2 !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
3 This file is built by metaconfig.
5 This file contains a description of all the shell variables whose value is
6 determined by the Configure script. Variables intended for use in C
7 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
8 generates pod documentation for Config.pm from this file--please try to keep
9 the formatting regular.]
12 This variable defines the extension used for ordinary library files.
13 For unix, it is '.a'. The '.' is included. Other possible
14 values include '.lib'.
17 This variable defines the extension used for executable files.
18 DJGPP, Cygwin and OS/2 use '.exe'. Stratus VOS uses '.pm'.
19 On operating systems which do not require a specific extension
20 for executable files, this variable is empty.
23 This variable defines the extension used for object files.
24 For unix, it is '.o'. The '.' is included. Other possible
25 values include '.obj'.
28 This variable is set to 'true' if AFS (Andrew File System) is used
29 on the system, 'false' otherwise. It is possible to override this
30 with a hint value or command line option, but you'd better know
34 This variable is by default set to '/afs'. In the unlikely case
35 this is not the correct root, it is possible to override this with
36 a hint value or command line option. This will be used in subsequent
37 tests for AFSness in the Perl configure and test process.
39 alignbytes (alignbytes.U):
40 This variable holds the number of bytes required to align a
41 double-- or a long double when applicable. Usual values are
42 2, 4 and 8. The default is eight, for safety.
44 ansi2knr (ansi2knr.U):
45 This variable is set if the user needs to run ansi2knr.
46 Currently, this is not supported, so we just abort.
48 aphostname (d_gethname.U):
49 This variable contains the command which can be used to compute the
50 host name. The command is fully qualified by its absolute path, to make
51 it safe when used by a process with super-user privileges.
53 api_revision (patchlevel.U):
54 The three variables, api_revision, api_version, and
55 api_subversion, specify the version of the oldest perl binary
56 compatible with the present perl. In a full version string
57 such as '5.6.1', api_revision is the '5'.
58 Prior to 5.5.640, the format was a floating point number,
61 perl.c:incpush() and lib/lib.pm will automatically search in
62 $sitelib/.. for older directories back to the limit specified
63 by these api_ variables. This is only useful if you have a
64 perl library directory tree structured like the default one.
65 See INSTALL for how this works. The versioned site_perl
66 directory was introduced in 5.005, so that is the lowest
67 possible value. The version list appropriate for the current
68 system is determined in inc_version_list.U.
70 XXX To do: Since compatibility can depend on compile time
71 options (such as bincompat, longlong, etc.) it should
72 (perhaps) be set by Configure, but currently it isn't.
73 Currently, we read a hard-wired value from patchlevel.h.
74 Perhaps what we ought to do is take the hard-wired value from
75 patchlevel.h but then modify it if the current Configure
76 options warrant. patchlevel.h then would use an #ifdef guard.
78 api_subversion (patchlevel.U):
79 The three variables, api_revision, api_version, and
80 api_subversion, specify the version of the oldest perl binary
81 compatible with the present perl. In a full version string
82 such as '5.6.1', api_subversion is the '1'. See api_revision for
85 api_version (patchlevel.U):
86 The three variables, api_revision, api_version, and
87 api_subversion, specify the version of the oldest perl binary
88 compatible with the present perl. In a full version string
89 such as '5.6.1', api_version is the '6'. See api_revision for
90 full details. As a special case, 5.5.0 is rendered in the
91 old-style as 5.005. (In the 5.005_0x maintenance series,
92 this was the only versioned directory in $sitelib.)
94 api_versionstring (patchlevel.U):
95 This variable combines api_revision, api_version, and
96 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
97 for use as a directory name. This is filesystem dependent.
100 This variable is used internally by Configure to determine the
101 full pathname (if any) of the ar program. After Configure runs,
102 the value is reset to a plain "ar" and is not useful.
105 This variable holds the name of the directory in which the user wants
106 to put architecture-dependent public library files for $package.
107 It is most often a local directory such as /usr/local/lib.
108 Programs using this variable must be prepared to deal
109 with filename expansion.
111 archlibexp (archlib.U):
112 This variable is the same as the archlib variable, but is
113 filename expanded at configuration time, for convenient use.
115 archname (archname.U):
116 This variable is a short name to characterize the current
117 architecture. It is used mainly to construct the default archlib.
119 archname64 (use64bits.U):
120 This variable is used for the 64-bitness part of $archname.
123 This variable defines any additional objects that must be linked
124 in with the program on this architecture. On unix, it is usually
125 empty. It is typically used to include emulations of unix calls
126 or other facilities. For perl on OS/2, for example, this would
129 asctime_r_proto (d_asctime_r.U):
130 This variable encodes the prototype of asctime_r.
131 It is zero if d_asctime_r is undef, and one of the
132 REENTRANT_PROTO_T_ABC macros of reentr.h if d_asctime_r
136 This variable is used internally by Configure to determine the
137 full pathname (if any) of the awk program. After Configure runs,
138 the value is reset to a plain "awk" and is not useful.
141 The base revision level of this package, from the .package file.
144 This variable is defined but not used by Configure.
145 The value is a plain '' and is not useful.
148 This variable holds the name of the directory in which the user wants
149 to put publicly executable images for the package in question. It
150 is most often a local directory such as /usr/local/bin. Programs using
151 this variable must be prepared to deal with ~name substitution.
154 This is the same as the bin variable, but is filename expanded at
155 configuration time, for use in your makefiles.
158 This variable is used internally by Configure to determine the
159 full pathname (if any) of the bison program. After Configure runs,
160 the value is reset to a plain "bison" and is not useful.
163 This variable is used internally by Configure to determine the
164 full pathname (if any) of the byacc program. After Configure runs,
165 the value is reset to a plain "byacc" and is not useful.
167 byteorder (byteorder.U):
168 This variable holds the byte order in a UV. In the following,
169 larger digits indicate more significance. The variable byteorder
170 is either 4321 on a big-endian machine, or 1234 on a little-endian,
171 or 87654321 on a Cray ... or 3412 with weird order !
174 This variable contains the \c string if that is what causes the echo
175 command to suppress newline. Otherwise it is null. Correct usage is
176 $echo $n "prompt for a question: $c".
178 castflags (d_castneg.U):
179 This variable contains a flag that precise difficulties the
180 compiler has casting odd floating values to unsigned long:
182 1 = couldn't cast < 0
183 2 = couldn't cast >= 0x80000000
184 4 = couldn't cast in argument expression list
187 This variable is used internally by Configure to determine the
188 full pathname (if any) of the cat program. After Configure runs,
189 the value is reset to a plain "cat" and is not useful.
192 This variable holds the name of a command to execute a C compiler which
193 can resolve multiple global references that happen to have the same
194 name. Usual values are 'cc' and 'gcc'.
195 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
197 cccdlflags (dlsrc.U):
198 This variable contains any special flags that might need to be
199 passed with 'cc -c' to compile modules to be used to create a shared
200 library that will be used for dynamic loading. For hpux, this
201 should be +z. It is up to the makefile to use it.
204 This variable contains any special flags that might need to be
205 passed to cc to link with a shared library for dynamic loading.
206 It is up to the makefile to use it. For sunos 4.1, it should
210 This variable contains any additional C compiler flags desired by
211 the user. It is up to the Makefile to use this.
213 ccflags_uselargefiles (uselfs.U):
214 This variable contains the compiler flags needed by large file builds
215 and added to ccflags by hints files.
218 This can set either by hints files or by Configure. If using
219 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
220 Some platforms, however, make good use of this by storing the
221 flavor of the C compiler being used here. For example if using
222 the Sun WorkShop suite, ccname will be 'workshop'.
224 ccsymbols (Cppsym.U):
225 The variable contains the symbols defined by the C compiler alone.
226 The symbols defined by cpp or by cc when it calls cpp are not in
227 this list, see cppsymbols and cppccsymbols.
228 The list is a space-separated list of symbol=value tokens.
230 ccversion (Checkcc.U):
231 This can set either by hints files or by Configure. If using
232 a (non-gcc) vendor cc, this variable may contain a version for
236 Login name of the person who ran the Configure script and answered the
237 questions. This is used to tag both config.sh and config_h.SH.
239 cf_email (cf_email.U):
240 Electronic mail address of the person who ran Configure. This can be
241 used by units that require the user's e-mail, like MailList.U.
244 Holds the output of the "date" command when the configuration file was
245 produced. This is used to tag both config.sh and config_h.SH.
247 charsize (charsize.U):
248 This variable contains the value of the CHARSIZE symbol, which
249 indicates to the C program how many bytes there are in a character.
252 This variable is defined but not used by Configure.
253 The value is a plain '' and is not useful.
256 This variable is used internally by Configure to determine the
257 full pathname (if any) of the chmod program. After Configure runs,
258 the value is reset to a plain "chmod" and is not useful.
261 This variable is defined but not used by Configure.
262 The value is a plain '' and is not useful.
264 clocktype (d_times.U):
265 This variable holds the type returned by times(). It can be long,
266 or clock_t on BSD sites (in which case <sys/types.h> should be
270 This variable is used internally by Configure to determine the
271 full pathname (if any) of the comm program. After Configure runs,
272 the value is reset to a plain "comm" and is not useful.
275 This variable is defined but not used by Configure.
276 The value is a plain '' and is not useful.
278 contains (contains.U):
279 This variable holds the command to do a grep with a proper return
280 status. On most sane systems it is simply "grep". On insane systems
281 it is a grep followed by a cat followed by a test. This variable
282 is primarily for the use of other Configure units.
285 This variable is used internally by Configure to determine the
286 full pathname (if any) of the cp program. After Configure runs,
287 the value is reset to a plain "cp" and is not useful.
290 This variable is defined but not used by Configure.
291 The value is a plain '' and is not useful.
294 This variable is used internally by Configure to determine the
295 full pathname (if any) of the cpp program. After Configure runs,
296 the value is reset to a plain "cpp" and is not useful.
298 cpp_stuff (cpp_stuff.U):
299 This variable contains an identification of the concatenation mechanism
300 used by the C preprocessor.
302 cppccsymbols (Cppsym.U):
303 The variable contains the symbols defined by the C compiler
304 when it calls cpp. The symbols defined by the cc alone or cpp
305 alone are not in this list, see ccsymbols and cppsymbols.
306 The list is a space-separated list of symbol=value tokens.
308 cppflags (ccflags.U):
309 This variable holds the flags that will be passed to the C pre-
310 processor. It is up to the Makefile to use it.
312 cpplast (cppstdin.U):
313 This variable has the same functionality as cppminus, only it applies
314 to cpprun and not cppstdin.
316 cppminus (cppstdin.U):
317 This variable contains the second part of the string which will invoke
318 the C preprocessor on the standard input and produce to standard
319 output. This variable will have the value "-" if cppstdin needs
320 a minus to specify standard input, otherwise the value is "".
323 This variable contains the command which will invoke a C preprocessor
324 on standard input and put the output to stdout. It is guaranteed not
325 to be a wrapper and may be a null string if no preprocessor can be
326 made directly available. This preprocessor might be different from the
327 one used by the C compiler. Don't forget to append cpplast after the
328 preprocessor options.
330 cppstdin (cppstdin.U):
331 This variable contains the command which will invoke the C
332 preprocessor on standard input and put the output to stdout.
333 It is primarily used by other Configure units that ask about
334 preprocessor symbols.
336 cppsymbols (Cppsym.U):
337 The variable contains the symbols defined by the C preprocessor
338 alone. The symbols defined by cc or by cc when it calls cpp are
339 not in this list, see ccsymbols and cppccsymbols.
340 The list is a space-separated list of symbol=value tokens.
342 crypt_r_proto (d_crypt_r.U):
343 This variable encodes the prototype of crypt_r.
344 It is zero if d_crypt_r is undef, and one of the
345 REENTRANT_PROTO_T_ABC macros of reentr.h if d_crypt_r
348 cryptlib (d_crypt.U):
349 This variable holds -lcrypt or the path to a libcrypt.a archive if
350 the crypt() function is not defined in the standard C library. It is
351 up to the Makefile to use this.
354 This variable is used internally by Configure to determine the
355 full pathname (if any) of the csh program. After Configure runs,
356 the value is reset to a plain "csh" and is not useful.
358 ctermid_r_proto (d_ctermid_r.U):
359 This variable encodes the prototype of ctermid_r.
360 It is zero if d_ctermid_r is undef, and one of the
361 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctermid_r
364 ctime_r_proto (d_ctime_r.U):
365 This variable encodes the prototype of ctime_r.
366 It is zero if d_ctime_r is undef, and one of the
367 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctime_r
370 d__fwalk (d__fwalk.U):
371 This variable conditionally defines HAS__FWALK if _fwalk() is
372 available to apply a function to all the file handles.
374 d_access (d_access.U):
375 This variable conditionally defines HAS_ACCESS if the access() system
376 call is available to check for access permissions using real IDs.
378 d_accessx (d_accessx.U):
379 This variable conditionally defines the HAS_ACCESSX symbol, which
380 indicates to the C program that the accessx() routine is available.
383 This variable conditionally defines the HAS_AINTL symbol, which
384 indicates to the C program that the aintl() routine is available.
385 If copysignl is also present we can emulate modfl.
388 This variable conditionally defines the HAS_ALARM symbol, which
389 indicates to the C program that the alarm() routine is available.
391 d_archlib (archlib.U):
392 This variable conditionally defines ARCHLIB to hold the pathname
393 of architecture-dependent library files for $package. If
394 $archlib is the same as $privlib, then this is set to undef.
396 d_asctime_r (d_asctime_r.U):
397 This variable conditionally defines the HAS_ASCTIME_R symbol,
398 which indicates to the C program that the asctime_r()
399 routine is available.
402 This variable conditionally defines the HAS_ATOLF symbol, which
403 indicates to the C program that the atolf() routine is available.
406 This variable conditionally defines the HAS_ATOLL symbol, which
407 indicates to the C program that the atoll() routine is available.
409 d_attribute_format (d_attribut.U):
410 This variable conditionally defines HASATTRIBUTE_FORMAT, which
411 indicates the C compiler can check for printf-like formats.
413 d_attribute_malloc (d_attribut.U):
414 This variable conditionally defines HASATTRIBUTE_MALLOC, which
415 indicates the C compiler can understand functions as having
416 malloc-like semantics.
418 d_attribute_nonnull (d_attribut.U):
419 This variable conditionally defines HASATTRIBUTE_NONNULL, which
420 indicates that the C compiler can know that certain arguments
421 must not be NULL, and will check accordingly at compile time.
423 d_attribute_noreturn (d_attribut.U):
424 This variable conditionally defines HASATTRIBUTE_NORETURN, which
425 indicates that the C compiler can know that certain functions
426 are guaranteed never to return.
428 d_attribute_pure (d_attribut.U):
429 This variable conditionally defines HASATTRIBUTE_PURE, which
430 indicates that the C compiler can know that certain functions
431 are "pure" functions, meaning that they have no side effects, and
432 only rely on function input and/or global data for their results.
434 d_attribute_unused (d_attribut.U):
435 This variable conditionally defines HASATTRIBUTE_UNUSED, which
436 indicates that the C compiler can know that certain variables
437 and arguments may not always be used, and to not throw warnings
438 if they don't get used.
440 d_attribute_warn_unused_result (d_attribut.U):
441 This variable conditionally defines
442 HASATTRIBUTE_WARN_UNUSED_RESULT, which indicates that the C
443 compiler can know that certain functions have a return values
444 that must not be ignored, such as malloc() or open().
447 This variable conditionally defines the HAS_BCMP symbol if
448 the bcmp() routine is available to compare strings.
451 This variable conditionally defines the HAS_BCOPY symbol if
452 the bcopy() routine is available to copy strings.
455 This symbol conditionally defines the symbol BSD when running on a
458 d_bsdgetpgrp (d_getpgrp.U):
459 This variable conditionally defines USE_BSD_GETPGRP if
460 getpgrp needs one arguments whereas USG one needs none.
462 d_bsdsetpgrp (d_setpgrp.U):
463 This variable conditionally defines USE_BSD_SETPGRP if
464 setpgrp needs two arguments whereas USG one needs none.
465 See also d_setpgid for a POSIX interface.
467 d_builtin_choose_expr (d_builtin.U):
468 This conditionally defines HAS_BUILTIN_CHOOSE_EXPR, which
469 indicates that the compiler supports __builtin_choose_expr(x,y,z).
470 This built-in function is analogous to the "x?y:z" operator in C,
471 except that the expression returned has its type unaltered by
472 promotion rules. Also, the built-in function does not evaluate
473 the expression that was not chosen.
475 d_builtin_expect (d_builtin.U):
476 This conditionally defines HAS_BUILTIN_EXPECT, which indicates
477 that the compiler supports __builtin_expect(exp,c). You may use
478 __builtin_expect to provide the compiler with branch prediction
482 This variable conditionally defines the HAS_BZERO symbol if
483 the bzero() routine is available to set memory to 0.
485 d_c99_variadic_macros (d_c99_variadic.U):
486 This variable conditionally defines the HAS_C99_VARIADIC_MACROS
487 symbol, which indicates to the C program that C99 variadic macros
490 d_casti32 (d_casti32.U):
491 This variable conditionally defines CASTI32, which indicates
492 whether the C compiler can cast large floats to 32-bit ints.
494 d_castneg (d_castneg.U):
495 This variable conditionally defines CASTNEG, which indicates
496 wether the C compiler can cast negative float to unsigned.
498 d_charvspr (d_vprintf.U):
499 This variable conditionally defines CHARVSPRINTF if this system
500 has vsprintf returning type (char*). The trend seems to be to
501 declare it as "int vsprintf()".
504 This variable conditionally defines the HAS_CHOWN symbol, which
505 indicates to the C program that the chown() routine is available.
507 d_chroot (d_chroot.U):
508 This variable conditionally defines the HAS_CHROOT symbol, which
509 indicates to the C program that the chroot() routine is available.
511 d_chsize (d_chsize.U):
512 This variable conditionally defines the CHSIZE symbol, which
513 indicates to the C program that the chsize() routine is available
514 to truncate files. You might need a -lx to get this routine.
517 This variable conditionally defines the HAS_CLASS symbol, which
518 indicates to the C program that the class() routine is available.
520 d_clearenv (d_clearenv.U):
521 This variable conditionally defines the HAS_CLEARENV symbol, which
522 indicates to the C program that the clearenv () routine is available.
524 d_closedir (d_closedir.U):
525 This variable conditionally defines HAS_CLOSEDIR if closedir() is
528 d_cmsghdr_s (d_cmsghdr_s.U):
529 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
530 which indicates that the struct cmsghdr is supported.
533 This variable conditionally defines the HASCONST symbol, which
534 indicates to the C program that this C compiler knows about the
537 d_copysignl (d_copysignl.U):
538 This variable conditionally defines the HAS_COPYSIGNL symbol, which
539 indicates to the C program that the copysignl() routine is available.
540 If aintl is also present we can emulate modfl.
542 d_cplusplus (d_cplusplus.U):
543 This variable conditionally defines the USE_CPLUSPLUS symbol, which
544 indicates that a C++ compiler was used to compiled Perl and will be
545 used to compile extensions.
548 This variable conditionally defines the CRYPT symbol, which
549 indicates to the C program that the crypt() routine is available
550 to encrypt passwords and the like.
552 d_crypt_r (d_crypt_r.U):
553 This variable conditionally defines the HAS_CRYPT_R symbol,
554 which indicates to the C program that the crypt_r()
555 routine is available.
558 This variable conditionally defines the CSH symbol, which
559 indicates to the C program that the C-shell exists.
561 d_ctermid (d_ctermid.U):
562 This variable conditionally defines CTERMID if ctermid() is
563 available to generate filename for terminal.
565 d_ctermid_r (d_ctermid_r.U):
566 This variable conditionally defines the HAS_CTERMID_R symbol,
567 which indicates to the C program that the ctermid_r()
568 routine is available.
570 d_ctime_r (d_ctime_r.U):
571 This variable conditionally defines the HAS_CTIME_R symbol,
572 which indicates to the C program that the ctime_r()
573 routine is available.
575 d_cuserid (d_cuserid.U):
576 This variable conditionally defines the HAS_CUSERID symbol, which
577 indicates to the C program that the cuserid() routine is available
578 to get character login names.
580 d_dbl_dig (d_dbl_dig.U):
581 This variable conditionally defines d_dbl_dig if this system's
582 header files provide DBL_DIG, which is the number of significant
583 digits in a double precision number.
585 d_dbminitproto (d_dbminitproto.U):
586 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
587 which indicates to the C program that the system provides
588 a prototype for the dbminit() function. Otherwise, it is
589 up to the program to supply one.
591 d_difftime (d_difftime.U):
592 This variable conditionally defines the HAS_DIFFTIME symbol, which
593 indicates to the C program that the difftime() routine is available.
595 d_dir_dd_fd (d_dir_dd_fd.U):
596 This variable conditionally defines the HAS_DIR_DD_FD symbol, which
597 indicates that the DIR directory stream type contains a member
598 variable called dd_fd.
601 This variable conditionally defines the HAS_DIRFD constant,
602 which indicates to the C program that dirfd() is available
603 to return the file descriptor of a directory stream.
605 d_dirnamlen (i_dirent.U):
606 This variable conditionally defines DIRNAMLEN, which indicates
607 to the C program that the length of directory entry names is
608 provided by a d_namelen field.
610 d_dlerror (d_dlerror.U):
611 This variable conditionally defines the HAS_DLERROR symbol, which
612 indicates to the C program that the dlerror() routine is available.
614 d_dlopen (d_dlopen.U):
615 This variable conditionally defines the HAS_DLOPEN symbol, which
616 indicates to the C program that the dlopen() routine is available.
618 d_dlsymun (d_dlsymun.U):
619 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
620 indicates that we need to prepend an underscore to the symbol
621 name before calling dlsym().
623 d_dosuid (d_dosuid.U):
624 This variable conditionally defines the symbol DOSUID, which
625 tells the C program that it should insert setuid emulation code
626 on hosts which have setuid #! scripts disabled.
628 d_drand48_r (d_drand48_r.U):
629 This variable conditionally defines the HAS_DRAND48_R symbol,
630 which indicates to the C program that the drand48_r()
631 routine is available.
633 d_drand48proto (d_drand48proto.U):
634 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
635 which indicates to the C program that the system provides
636 a prototype for the drand48() function. Otherwise, it is
637 up to the program to supply one.
640 This variable conditionally defines HAS_DUP2 if dup2() is
641 available to duplicate file descriptors.
643 d_eaccess (d_eaccess.U):
644 This variable conditionally defines the HAS_EACCESS symbol, which
645 indicates to the C program that the eaccess() routine is available.
647 d_endgrent (d_endgrent.U):
648 This variable conditionally defines the HAS_ENDGRENT symbol, which
649 indicates to the C program that the endgrent() routine is available
650 for sequential access of the group database.
652 d_endgrent_r (d_endgrent_r.U):
653 This variable conditionally defines the HAS_ENDGRENT_R symbol,
654 which indicates to the C program that the endgrent_r()
655 routine is available.
657 d_endhent (d_endhent.U):
658 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
659 available to close whatever was being used for host queries.
661 d_endhostent_r (d_endhostent_r.U):
662 This variable conditionally defines the HAS_ENDHOSTENT_R symbol,
663 which indicates to the C program that the endhostent_r()
664 routine is available.
666 d_endnent (d_endnent.U):
667 This variable conditionally defines HAS_ENDNETENT if endnetent() is
668 available to close whatever was being used for network queries.
670 d_endnetent_r (d_endnetent_r.U):
671 This variable conditionally defines the HAS_ENDNETENT_R symbol,
672 which indicates to the C program that the endnetent_r()
673 routine is available.
675 d_endpent (d_endpent.U):
676 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
677 available to close whatever was being used for protocol queries.
679 d_endprotoent_r (d_endprotoent_r.U):
680 This variable conditionally defines the HAS_ENDPROTOENT_R symbol,
681 which indicates to the C program that the endprotoent_r()
682 routine is available.
684 d_endpwent (d_endpwent.U):
685 This variable conditionally defines the HAS_ENDPWENT symbol, which
686 indicates to the C program that the endpwent() routine is available
687 for sequential access of the passwd database.
689 d_endpwent_r (d_endpwent_r.U):
690 This variable conditionally defines the HAS_ENDPWENT_R symbol,
691 which indicates to the C program that the endpwent_r()
692 routine is available.
694 d_endsent (d_endsent.U):
695 This variable conditionally defines HAS_ENDSERVENT if endservent() is
696 available to close whatever was being used for service queries.
698 d_endservent_r (d_endservent_r.U):
699 This variable conditionally defines the HAS_ENDSERVENT_R symbol,
700 which indicates to the C program that the endservent_r()
701 routine is available.
703 d_eofnblk (nblock_io.U):
704 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
705 when reading from a non-blocking I/O source.
708 This variable conditionally defines the symbols EUNICE and VAX, which
709 alerts the C program that it must deal with ideosyncracies of VMS.
711 d_faststdio (d_faststdio.U):
712 This variable conditionally defines the HAS_FAST_STDIO symbol,
713 which indicates to the C program that the "fast stdio" is available
714 to manipulate the stdio buffers directly.
716 d_fchdir (d_fchdir.U):
717 This variable conditionally defines the HAS_FCHDIR symbol, which
718 indicates to the C program that the fchdir() routine is available.
720 d_fchmod (d_fchmod.U):
721 This variable conditionally defines the HAS_FCHMOD symbol, which
722 indicates to the C program that the fchmod() routine is available
723 to change mode of opened files.
725 d_fchown (d_fchown.U):
726 This variable conditionally defines the HAS_FCHOWN symbol, which
727 indicates to the C program that the fchown() routine is available
728 to change ownership of opened files.
731 This variable conditionally defines the HAS_FCNTL symbol, and indicates
732 whether the fcntl() function exists
734 d_fcntl_can_lock (d_fcntl_can_lock.U):
735 This variable conditionally defines the FCNTL_CAN_LOCK symbol
736 and indicates whether file locking with fcntl() works.
738 d_fd_macros (d_fd_set.U):
739 This variable contains the eventual value of the HAS_FD_MACROS symbol,
740 which indicates if your C compiler knows about the macros which
741 manipulate an fd_set.
743 d_fd_set (d_fd_set.U):
744 This variable contains the eventual value of the HAS_FD_SET symbol,
745 which indicates if your C compiler knows about the fd_set typedef.
747 d_fds_bits (d_fd_set.U):
748 This variable contains the eventual value of the HAS_FDS_BITS symbol,
749 which indicates if your fd_set typedef contains the fds_bits member.
750 If you have an fd_set typedef, but the dweebs who installed it did
751 a half-fast job and neglected to provide the macros to manipulate
752 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
754 d_fgetpos (d_fgetpos.U):
755 This variable conditionally defines HAS_FGETPOS if fgetpos() is
756 available to get the file position indicator.
758 d_finite (d_finite.U):
759 This variable conditionally defines the HAS_FINITE symbol, which
760 indicates to the C program that the finite() routine is available.
762 d_finitel (d_finitel.U):
763 This variable conditionally defines the HAS_FINITEL symbol, which
764 indicates to the C program that the finitel() routine is available.
766 d_flexfnam (d_flexfnam.U):
767 This variable conditionally defines the FLEXFILENAMES symbol, which
768 indicates that the system supports filenames longer than 14 characters.
771 This variable conditionally defines HAS_FLOCK if flock() is
772 available to do file locking.
774 d_flockproto (d_flockproto.U):
775 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
776 which indicates to the C program that the system provides
777 a prototype for the flock() function. Otherwise, it is
778 up to the program to supply one.
781 This variable conditionally defines the HAS_FORK symbol, which
782 indicates to the C program that the fork() routine is available.
784 d_fp_class (d_fp_class.U):
785 This variable conditionally defines the HAS_FP_CLASS symbol, which
786 indicates to the C program that the fp_class() routine is available.
788 d_fpathconf (d_pathconf.U):
789 This variable conditionally defines the HAS_FPATHCONF symbol, which
790 indicates to the C program that the pathconf() routine is available
791 to determine file-system related limits and options associated
792 with a given open file descriptor.
794 d_fpclass (d_fpclass.U):
795 This variable conditionally defines the HAS_FPCLASS symbol, which
796 indicates to the C program that the fpclass() routine is available.
798 d_fpclassify (d_fpclassify.U):
799 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
800 indicates to the C program that the fpclassify() routine is available.
802 d_fpclassl (d_fpclassl.U):
803 This variable conditionally defines the HAS_FPCLASSL symbol, which
804 indicates to the C program that the fpclassl() routine is available.
806 d_fpos64_t (d_fpos64_t.U):
807 This symbol will be defined if the C compiler supports fpos64_t.
809 d_frexpl (d_frexpl.U):
810 This variable conditionally defines the HAS_FREXPL symbol, which
811 indicates to the C program that the frexpl() routine is available.
813 d_fs_data_s (d_fs_data_s.U):
814 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
815 which indicates that the struct fs_data is supported.
817 d_fseeko (d_fseeko.U):
818 This variable conditionally defines the HAS_FSEEKO symbol, which
819 indicates to the C program that the fseeko() routine is available.
821 d_fsetpos (d_fsetpos.U):
822 This variable conditionally defines HAS_FSETPOS if fsetpos() is
823 available to set the file position indicator.
825 d_fstatfs (d_fstatfs.U):
826 This variable conditionally defines the HAS_FSTATFS symbol, which
827 indicates to the C program that the fstatfs() routine is available.
829 d_fstatvfs (d_statvfs.U):
830 This variable conditionally defines the HAS_FSTATVFS symbol, which
831 indicates to the C program that the fstatvfs() routine is available.
834 This variable conditionally defines the HAS_FSYNC symbol, which
835 indicates to the C program that the fsync() routine is available.
837 d_ftello (d_ftello.U):
838 This variable conditionally defines the HAS_FTELLO symbol, which
839 indicates to the C program that the ftello() routine is available.
842 This variable conditionally defines the HAS_FTIME symbol, which indicates
843 that the ftime() routine exists. The ftime() routine is basically
844 a sub-second accuracy clock.
846 d_futimes (d_futimes.U):
847 This variable conditionally defines the HAS_FUTIMES symbol, which
848 indicates to the C program that the futimes() routine is available.
850 d_Gconvert (d_gconvert.U):
851 This variable holds what Gconvert is defined as to convert
852 floating point numbers into strings. By default, Configure
853 sets this macro to use the first of gconvert, gcvt, or sprintf
854 that pass sprintf-%g-like behaviour tests. If perl is using
855 long doubles, the macro uses the first of the following
856 functions that pass Configure's tests: qgcvt, sprintf (if
857 Configure knows how to make sprintf format long doubles--see
858 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
859 The gconvert_preference and gconvert_ld_preference variables
860 can be used to alter Configure's preferences, for doubles and
861 long doubles, respectively. If present, they contain a
862 space-separated list of one or more of the above function
863 names in the order they should be tried.
865 d_Gconvert may be set to override Configure with a platform-
866 specific function. If this function expects a double, a
867 different value may need to be set by the uselongdouble.cbu
868 call-back unit so that long doubles can be formatted without
871 d_getcwd (d_getcwd.U):
872 This variable conditionally defines the HAS_GETCWD symbol, which
873 indicates to the C program that the getcwd() routine is available
874 to get the current working directory.
876 d_getespwnam (d_getespwnam.U):
877 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
878 available to retrieve enchanced (shadow) password entries by name.
880 d_getfsstat (d_getfsstat.U):
881 This variable conditionally defines the HAS_GETFSSTAT symbol, which
882 indicates to the C program that the getfsstat() routine is available.
884 d_getgrent (d_getgrent.U):
885 This variable conditionally defines the HAS_GETGRENT symbol, which
886 indicates to the C program that the getgrent() routine is available
887 for sequential access of the group database.
889 d_getgrent_r (d_getgrent_r.U):
890 This variable conditionally defines the HAS_GETGRENT_R symbol,
891 which indicates to the C program that the getgrent_r()
892 routine is available.
894 d_getgrgid_r (d_getgrgid_r.U):
895 This variable conditionally defines the HAS_GETGRGID_R symbol,
896 which indicates to the C program that the getgrgid_r()
897 routine is available.
899 d_getgrnam_r (d_getgrnam_r.U):
900 This variable conditionally defines the HAS_GETGRNAM_R symbol,
901 which indicates to the C program that the getgrnam_r()
902 routine is available.
904 d_getgrps (d_getgrps.U):
905 This variable conditionally defines the HAS_GETGROUPS symbol, which
906 indicates to the C program that the getgroups() routine is available
907 to get the list of process groups.
909 d_gethbyaddr (d_gethbyad.U):
910 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
911 indicates to the C program that the gethostbyaddr() routine is available
912 to look up hosts by their IP addresses.
914 d_gethbyname (d_gethbynm.U):
915 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
916 indicates to the C program that the gethostbyname() routine is available
917 to look up host names in some data base or other.
919 d_gethent (d_gethent.U):
920 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
921 available to look up host names in some data base or another.
923 d_gethname (d_gethname.U):
924 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
925 indicates to the C program that the gethostname() routine may be
926 used to derive the host name.
928 d_gethostbyaddr_r (d_gethostbyaddr_r.U):
929 This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,
930 which indicates to the C program that the gethostbyaddr_r()
931 routine is available.
933 d_gethostbyname_r (d_gethostbyname_r.U):
934 This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,
935 which indicates to the C program that the gethostbyname_r()
936 routine is available.
938 d_gethostent_r (d_gethostent_r.U):
939 This variable conditionally defines the HAS_GETHOSTENT_R symbol,
940 which indicates to the C program that the gethostent_r()
941 routine is available.
943 d_gethostprotos (d_gethostprotos.U):
944 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
945 which indicates to the C program that <netdb.h> supplies
946 prototypes for the various gethost*() functions.
947 See also netdbtype.U for probing for various netdb types.
949 d_getitimer (d_getitimer.U):
950 This variable conditionally defines the HAS_GETITIMER symbol, which
951 indicates to the C program that the getitimer() routine is available.
953 d_getlogin (d_getlogin.U):
954 This variable conditionally defines the HAS_GETLOGIN symbol, which
955 indicates to the C program that the getlogin() routine is available
956 to get the login name.
958 d_getlogin_r (d_getlogin_r.U):
959 This variable conditionally defines the HAS_GETLOGIN_R symbol,
960 which indicates to the C program that the getlogin_r()
961 routine is available.
963 d_getmnt (d_getmnt.U):
964 This variable conditionally defines the HAS_GETMNT symbol, which
965 indicates to the C program that the getmnt() routine is available
966 to retrieve one or more mount info blocks by filename.
968 d_getmntent (d_getmntent.U):
969 This variable conditionally defines the HAS_GETMNTENT symbol, which
970 indicates to the C program that the getmntent() routine is available
971 to iterate through mounted files to get their mount info.
973 d_getnbyaddr (d_getnbyad.U):
974 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
975 indicates to the C program that the getnetbyaddr() routine is available
976 to look up networks by their IP addresses.
978 d_getnbyname (d_getnbynm.U):
979 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
980 indicates to the C program that the getnetbyname() routine is available
981 to look up networks by their names.
983 d_getnent (d_getnent.U):
984 This variable conditionally defines HAS_GETNETENT if getnetent() is
985 available to look up network names in some data base or another.
987 d_getnetbyaddr_r (d_getnetbyaddr_r.U):
988 This variable conditionally defines the HAS_GETNETBYADDR_R symbol,
989 which indicates to the C program that the getnetbyaddr_r()
990 routine is available.
992 d_getnetbyname_r (d_getnetbyname_r.U):
993 This variable conditionally defines the HAS_GETNETBYNAME_R symbol,
994 which indicates to the C program that the getnetbyname_r()
995 routine is available.
997 d_getnetent_r (d_getnetent_r.U):
998 This variable conditionally defines the HAS_GETNETENT_R symbol,
999 which indicates to the C program that the getnetent_r()
1000 routine is available.
1002 d_getnetprotos (d_getnetprotos.U):
1003 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
1004 which indicates to the C program that <netdb.h> supplies
1005 prototypes for the various getnet*() functions.
1006 See also netdbtype.U for probing for various netdb types.
1008 d_getpagsz (d_getpagsz.U):
1009 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
1010 is available to get the system page size.
1012 d_getpbyname (d_getprotby.U):
1013 This variable conditionally defines the HAS_GETPROTOBYNAME
1014 symbol, which indicates to the C program that the
1015 getprotobyname() routine is available to look up protocols
1018 d_getpbynumber (d_getprotby.U):
1019 This variable conditionally defines the HAS_GETPROTOBYNUMBER
1020 symbol, which indicates to the C program that the
1021 getprotobynumber() routine is available to look up protocols
1024 d_getpent (d_getpent.U):
1025 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
1026 available to look up protocols in some data base or another.
1028 d_getpgid (d_getpgid.U):
1029 This variable conditionally defines the HAS_GETPGID symbol, which
1030 indicates to the C program that the getpgid(pid) function
1031 is available to get the process group id.
1033 d_getpgrp (d_getpgrp.U):
1034 This variable conditionally defines HAS_GETPGRP if getpgrp() is
1035 available to get the current process group.
1037 d_getpgrp2 (d_getpgrp2.U):
1038 This variable conditionally defines the HAS_GETPGRP2 symbol, which
1039 indicates to the C program that the getpgrp2() (as in DG/UX) routine
1040 is available to get the current process group.
1042 d_getppid (d_getppid.U):
1043 This variable conditionally defines the HAS_GETPPID symbol, which
1044 indicates to the C program that the getppid() routine is available
1045 to get the parent process ID.
1047 d_getprior (d_getprior.U):
1048 This variable conditionally defines HAS_GETPRIORITY if getpriority()
1049 is available to get a process's priority.
1051 d_getprotobyname_r (d_getprotobyname_r.U):
1052 This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,
1053 which indicates to the C program that the getprotobyname_r()
1054 routine is available.
1056 d_getprotobynumber_r (d_getprotobynumber_r.U):
1057 This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,
1058 which indicates to the C program that the getprotobynumber_r()
1059 routine is available.
1061 d_getprotoent_r (d_getprotoent_r.U):
1062 This variable conditionally defines the HAS_GETPROTOENT_R symbol,
1063 which indicates to the C program that the getprotoent_r()
1064 routine is available.
1066 d_getprotoprotos (d_getprotoprotos.U):
1067 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
1068 which indicates to the C program that <netdb.h> supplies
1069 prototypes for the various getproto*() functions.
1070 See also netdbtype.U for probing for various netdb types.
1072 d_getprpwnam (d_getprpwnam.U):
1073 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
1074 available to retrieve protected (shadow) password entries by name.
1076 d_getpwent (d_getpwent.U):
1077 This variable conditionally defines the HAS_GETPWENT symbol, which
1078 indicates to the C program that the getpwent() routine is available
1079 for sequential access of the passwd database.
1081 d_getpwent_r (d_getpwent_r.U):
1082 This variable conditionally defines the HAS_GETPWENT_R symbol,
1083 which indicates to the C program that the getpwent_r()
1084 routine is available.
1086 d_getpwnam_r (d_getpwnam_r.U):
1087 This variable conditionally defines the HAS_GETPWNAM_R symbol,
1088 which indicates to the C program that the getpwnam_r()
1089 routine is available.
1091 d_getpwuid_r (d_getpwuid_r.U):
1092 This variable conditionally defines the HAS_GETPWUID_R symbol,
1093 which indicates to the C program that the getpwuid_r()
1094 routine is available.
1096 d_getsbyname (d_getsrvby.U):
1097 This variable conditionally defines the HAS_GETSERVBYNAME
1098 symbol, which indicates to the C program that the
1099 getservbyname() routine is available to look up services
1102 d_getsbyport (d_getsrvby.U):
1103 This variable conditionally defines the HAS_GETSERVBYPORT
1104 symbol, which indicates to the C program that the
1105 getservbyport() routine is available to look up services
1108 d_getsent (d_getsent.U):
1109 This variable conditionally defines HAS_GETSERVENT if getservent() is
1110 available to look up network services in some data base or another.
1112 d_getservbyname_r (d_getservbyname_r.U):
1113 This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,
1114 which indicates to the C program that the getservbyname_r()
1115 routine is available.
1117 d_getservbyport_r (d_getservbyport_r.U):
1118 This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,
1119 which indicates to the C program that the getservbyport_r()
1120 routine is available.
1122 d_getservent_r (d_getservent_r.U):
1123 This variable conditionally defines the HAS_GETSERVENT_R symbol,
1124 which indicates to the C program that the getservent_r()
1125 routine is available.
1127 d_getservprotos (d_getservprotos.U):
1128 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
1129 which indicates to the C program that <netdb.h> supplies
1130 prototypes for the various getserv*() functions.
1131 See also netdbtype.U for probing for various netdb types.
1133 d_getspnam (d_getspnam.U):
1134 This variable conditionally defines HAS_GETSPNAM if getspnam() is
1135 available to retrieve SysV shadow password entries by name.
1137 d_getspnam_r (d_getspnam_r.U):
1138 This variable conditionally defines the HAS_GETSPNAM_R symbol,
1139 which indicates to the C program that the getspnam_r()
1140 routine is available.
1142 d_gettimeod (d_ftime.U):
1143 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
1144 indicates that the gettimeofday() system call exists (to obtain a
1145 sub-second accuracy clock). You should probably include <sys/resource.h>.
1147 d_gmtime_r (d_gmtime_r.U):
1148 This variable conditionally defines the HAS_GMTIME_R symbol,
1149 which indicates to the C program that the gmtime_r()
1150 routine is available.
1152 d_gnulibc (d_gnulibc.U):
1153 Defined if we're dealing with the GNU C Library.
1155 d_grpasswd (i_grp.U):
1156 This variable conditionally defines GRPASSWD, which indicates
1157 that struct group in <grp.h> contains gr_passwd.
1159 d_hasmntopt (d_hasmntopt.U):
1160 This variable conditionally defines the HAS_HASMNTOPT symbol, which
1161 indicates to the C program that the hasmntopt() routine is available
1162 to query the mount options of file systems.
1164 d_htonl (d_htonl.U):
1165 This variable conditionally defines HAS_HTONL if htonl() and its
1166 friends are available to do network order byte swapping.
1168 d_ilogbl (d_ilogbl.U):
1169 This variable conditionally defines the HAS_ILOGBL symbol, which
1170 indicates to the C program that the ilogbl() routine is available.
1171 If scalbnl is also present we can emulate frexpl.
1173 d_inc_version_list (inc_version_list.U):
1174 This variable conditionally defines PERL_INC_VERSION_LIST.
1175 It is set to undef when PERL_INC_VERSION_LIST is empty.
1177 d_index (d_strchr.U):
1178 This variable conditionally defines HAS_INDEX if index() and
1179 rindex() are available for string searching.
1181 d_inetaton (d_inetaton.U):
1182 This variable conditionally defines the HAS_INET_ATON symbol, which
1183 indicates to the C program that the inet_aton() function is available
1184 to parse IP address "dotted-quad" strings.
1186 d_int64_t (d_int64_t.U):
1187 This symbol will be defined if the C compiler supports int64_t.
1189 d_isascii (d_isascii.U):
1190 This variable conditionally defines the HAS_ISASCII constant,
1191 which indicates to the C program that isascii() is available.
1193 d_isfinite (d_isfinite.U):
1194 This variable conditionally defines the HAS_ISFINITE symbol, which
1195 indicates to the C program that the isfinite() routine is available.
1197 d_isinf (d_isinf.U):
1198 This variable conditionally defines the HAS_ISINF symbol, which
1199 indicates to the C program that the isinf() routine is available.
1201 d_isnan (d_isnan.U):
1202 This variable conditionally defines the HAS_ISNAN symbol, which
1203 indicates to the C program that the isnan() routine is available.
1205 d_isnanl (d_isnanl.U):
1206 This variable conditionally defines the HAS_ISNANL symbol, which
1207 indicates to the C program that the isnanl() routine is available.
1209 d_killpg (d_killpg.U):
1210 This variable conditionally defines the HAS_KILLPG symbol, which
1211 indicates to the C program that the killpg() routine is available
1212 to kill process groups.
1214 d_lchown (d_lchown.U):
1215 This variable conditionally defines the HAS_LCHOWN symbol, which
1216 indicates to the C program that the lchown() routine is available
1217 to operate on a symbolic link (instead of following the link).
1219 d_ldbl_dig (d_ldbl_dig.U):
1220 This variable conditionally defines d_ldbl_dig if this system's
1221 header files provide LDBL_DIG, which is the number of significant
1222 digits in a long double precision number.
1224 d_libm_lib_version (d_libm_lib_version.U):
1225 This variable conditionally defines the LIBM_LIB_VERSION symbol,
1226 which indicates to the C program that math.h defines _LIB_VERSION
1227 being available in libm
1230 This variable conditionally defines HAS_LINK if link() is
1231 available to create hard links.
1233 d_localtime_r (d_localtime_r.U):
1234 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1235 which indicates to the C program that the localtime_r()
1236 routine is available.
1238 d_localtime_r_needs_tzset (d_localtime_r.U):
1239 This variable conditionally defines the LOCALTIME_R_NEEDS_TZSET
1240 symbol, which makes us call tzset before localtime_r()
1242 d_locconv (d_locconv.U):
1243 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1244 available for numeric and monetary formatting conventions.
1246 d_lockf (d_lockf.U):
1247 This variable conditionally defines HAS_LOCKF if lockf() is
1248 available to do file locking.
1250 d_longdbl (d_longdbl.U):
1251 This variable conditionally defines HAS_LONG_DOUBLE if
1252 the long double type is supported.
1254 d_longlong (d_longlong.U):
1255 This variable conditionally defines HAS_LONG_LONG if
1256 the long long type is supported.
1258 d_lseekproto (d_lseekproto.U):
1259 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1260 which indicates to the C program that the system provides
1261 a prototype for the lseek() function. Otherwise, it is
1262 up to the program to supply one.
1264 d_lstat (d_lstat.U):
1265 This variable conditionally defines HAS_LSTAT if lstat() is
1266 available to do file stats on symbolic links.
1268 d_madvise (d_madvise.U):
1269 This variable conditionally defines HAS_MADVISE if madvise() is
1270 available to map a file into memory.
1272 d_malloc_good_size (d_malloc_size.U):
1273 This symbol, if defined, indicates that the malloc_good_size
1274 routine is available for use.
1276 d_malloc_size (d_malloc_size.U):
1277 This symbol, if defined, indicates that the malloc_size
1278 routine is available for use.
1280 d_mblen (d_mblen.U):
1281 This variable conditionally defines the HAS_MBLEN symbol, which
1282 indicates to the C program that the mblen() routine is available
1283 to find the number of bytes in a multibye character.
1285 d_mbstowcs (d_mbstowcs.U):
1286 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1287 indicates to the C program that the mbstowcs() routine is available
1288 to convert a multibyte string into a wide character string.
1290 d_mbtowc (d_mbtowc.U):
1291 This variable conditionally defines the HAS_MBTOWC symbol, which
1292 indicates to the C program that the mbtowc() routine is available
1293 to convert multibyte to a wide character.
1295 d_memchr (d_memchr.U):
1296 This variable conditionally defines the HAS_MEMCHR symbol, which
1297 indicates to the C program that the memchr() routine is available
1298 to locate characters within a C string.
1300 d_memcmp (d_memcmp.U):
1301 This variable conditionally defines the HAS_MEMCMP symbol, which
1302 indicates to the C program that the memcmp() routine is available
1303 to compare blocks of memory.
1305 d_memcpy (d_memcpy.U):
1306 This variable conditionally defines the HAS_MEMCPY symbol, which
1307 indicates to the C program that the memcpy() routine is available
1308 to copy blocks of memory.
1310 d_memmove (d_memmove.U):
1311 This variable conditionally defines the HAS_MEMMOVE symbol, which
1312 indicates to the C program that the memmove() routine is available
1313 to copy potentatially overlapping blocks of memory.
1315 d_memset (d_memset.U):
1316 This variable conditionally defines the HAS_MEMSET symbol, which
1317 indicates to the C program that the memset() routine is available
1318 to set blocks of memory.
1320 d_mkdir (d_mkdir.U):
1321 This variable conditionally defines the HAS_MKDIR symbol, which
1322 indicates to the C program that the mkdir() routine is available
1323 to create directories..
1325 d_mkdtemp (d_mkdtemp.U):
1326 This variable conditionally defines the HAS_MKDTEMP symbol, which
1327 indicates to the C program that the mkdtemp() routine is available
1328 to exclusively create a uniquely named temporary directory.
1330 d_mkfifo (d_mkfifo.U):
1331 This variable conditionally defines the HAS_MKFIFO symbol, which
1332 indicates to the C program that the mkfifo() routine is available.
1334 d_mkstemp (d_mkstemp.U):
1335 This variable conditionally defines the HAS_MKSTEMP symbol, which
1336 indicates to the C program that the mkstemp() routine is available
1337 to exclusively create and open a uniquely named temporary file.
1339 d_mkstemps (d_mkstemps.U):
1340 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1341 indicates to the C program that the mkstemps() routine is available
1342 to exclusively create and open a uniquely named (with a suffix)
1345 d_mktime (d_mktime.U):
1346 This variable conditionally defines the HAS_MKTIME symbol, which
1347 indicates to the C program that the mktime() routine is available.
1350 This variable conditionally defines HAS_MMAP if mmap() is
1351 available to map a file into memory.
1353 d_modfl (d_modfl.U):
1354 This variable conditionally defines the HAS_MODFL symbol, which
1355 indicates to the C program that the modfl() routine is available.
1357 d_modfl_pow32_bug (d_modfl.U):
1358 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1359 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1360 For example from 4294967303.150000 one would get 4294967302.000000
1361 and 1.150000. The bug has been seen in certain versions of glibc,
1362 release 2.2.2 is known to be okay.
1364 d_modflproto (d_modfl.U):
1365 This symbol, if defined, indicates that the system provides
1366 a prototype for the modfl() function. Otherwise, it is up
1367 to the program to supply one. C99 says it should be
1368 long double modfl(long double, long double *);
1370 d_mprotect (d_mprotect.U):
1371 This variable conditionally defines HAS_MPROTECT if mprotect() is
1372 available to modify the access protection of a memory mapped file.
1375 This variable conditionally defines the HAS_MSG symbol, which
1376 indicates that the entire msg*(2) library is present.
1378 d_msg_ctrunc (d_socket.U):
1379 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1380 which indicates that the MSG_CTRUNC is available. #ifdef is
1381 not enough because it may be an enum, glibc has been known to do this.
1383 d_msg_dontroute (d_socket.U):
1384 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1385 which indicates that the MSG_DONTROUTE is available. #ifdef is
1386 not enough because it may be an enum, glibc has been known to do this.
1388 d_msg_oob (d_socket.U):
1389 This variable conditionally defines the HAS_MSG_OOB symbol,
1390 which indicates that the MSG_OOB is available. #ifdef is
1391 not enough because it may be an enum, glibc has been known to do this.
1393 d_msg_peek (d_socket.U):
1394 This variable conditionally defines the HAS_MSG_PEEK symbol,
1395 which indicates that the MSG_PEEK is available. #ifdef is
1396 not enough because it may be an enum, glibc has been known to do this.
1398 d_msg_proxy (d_socket.U):
1399 This variable conditionally defines the HAS_MSG_PROXY symbol,
1400 which indicates that the MSG_PROXY is available. #ifdef is
1401 not enough because it may be an enum, glibc has been known to do this.
1403 d_msgctl (d_msgctl.U):
1404 This variable conditionally defines the HAS_MSGCTL symbol, which
1405 indicates to the C program that the msgctl() routine is available.
1407 d_msgget (d_msgget.U):
1408 This variable conditionally defines the HAS_MSGGET symbol, which
1409 indicates to the C program that the msgget() routine is available.
1411 d_msghdr_s (d_msghdr_s.U):
1412 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1413 which indicates that the struct msghdr is supported.
1415 d_msgrcv (d_msgrcv.U):
1416 This variable conditionally defines the HAS_MSGRCV symbol, which
1417 indicates to the C program that the msgrcv() routine is available.
1419 d_msgsnd (d_msgsnd.U):
1420 This variable conditionally defines the HAS_MSGSND symbol, which
1421 indicates to the C program that the msgsnd() routine is available.
1423 d_msync (d_msync.U):
1424 This variable conditionally defines HAS_MSYNC if msync() is
1425 available to synchronize a mapped file.
1427 d_munmap (d_munmap.U):
1428 This variable conditionally defines HAS_MUNMAP if munmap() is
1429 available to unmap a region mapped by mmap().
1431 d_mymalloc (mallocsrc.U):
1432 This variable conditionally defines MYMALLOC in case other parts
1433 of the source want to take special action if MYMALLOC is used.
1434 This may include different sorts of profiling or error detection.
1437 This variable conditionally defines the HAS_NICE symbol, which
1438 indicates to the C program that the nice() routine is available.
1440 d_nl_langinfo (d_nl_langinfo.U):
1441 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1442 indicates to the C program that the nl_langinfo() routine is available.
1444 d_nv_preserves_uv (perlxv.U):
1445 This variable indicates whether a variable of type nvtype
1446 can preserve all the bits a variable of type uvtype.
1448 d_nv_zero_is_allbits_zero (perlxv.U):
1449 This variable indicates whether a variable of type nvtype
1450 stores 0.0 in memory as all bits zero.
1452 d_off64_t (d_off64_t.U):
1453 This symbol will be defined if the C compiler supports off64_t.
1455 d_old_pthread_create_joinable (d_pthrattrj.U):
1456 This variable conditionally defines pthread_create_joinable.
1457 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1459 d_oldpthreads (usethreads.U):
1460 This variable conditionally defines the OLD_PTHREADS_API symbol,
1461 and indicates that Perl should be built to use the old
1462 draft POSIX threads API. This is only potentially meaningful if
1465 d_oldsock (d_socket.U):
1466 This variable conditionally defines the OLDSOCKET symbol, which
1467 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1469 d_open3 (d_open3.U):
1470 This variable conditionally defines the HAS_OPEN3 manifest constant,
1471 which indicates to the C program that the 3 argument version of
1472 the open(2) function is available.
1474 d_pathconf (d_pathconf.U):
1475 This variable conditionally defines the HAS_PATHCONF symbol, which
1476 indicates to the C program that the pathconf() routine is available
1477 to determine file-system related limits and options associated
1478 with a given filename.
1480 d_pause (d_pause.U):
1481 This variable conditionally defines the HAS_PAUSE symbol, which
1482 indicates to the C program that the pause() routine is available
1483 to suspend a process until a signal is received.
1485 d_perl_otherlibdirs (otherlibdirs.U):
1486 This variable conditionally defines PERL_OTHERLIBDIRS, which
1487 contains a colon-separated set of paths for the perl binary to
1488 include in @INC. See also otherlibdirs.
1490 d_phostname (d_gethname.U):
1491 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1492 contains the shell command which, when fed to popen(), may be
1493 used to derive the host name.
1496 This variable conditionally defines the HAS_PIPE symbol, which
1497 indicates to the C program that the pipe() routine is available
1498 to create an inter-process channel.
1501 This variable conditionally defines the HAS_POLL symbol, which
1502 indicates to the C program that the poll() routine is available
1503 to poll active file descriptors.
1505 d_portable (d_portable.U):
1506 This variable conditionally defines the PORTABLE symbol, which
1507 indicates to the C program that it should not assume that it is
1508 running on the machine it was compiled on.
1510 d_PRId64 (quadfio.U):
1511 This variable conditionally defines the PERL_PRId64 symbol, which
1512 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1514 d_PRIeldbl (longdblfio.U):
1515 This variable conditionally defines the PERL_PRIfldbl symbol, which
1516 indiciates that stdio has a symbol to print long doubles.
1518 d_PRIEUldbl (longdblfio.U):
1519 This variable conditionally defines the PERL_PRIfldbl symbol, which
1520 indiciates that stdio has a symbol to print long doubles.
1521 The 'U' in the name is to separate this from d_PRIeldbl so that even
1522 case-blind systems can see the difference.
1524 d_PRIfldbl (longdblfio.U):
1525 This variable conditionally defines the PERL_PRIfldbl symbol, which
1526 indiciates that stdio has a symbol to print long doubles.
1528 d_PRIFUldbl (longdblfio.U):
1529 This variable conditionally defines the PERL_PRIfldbl symbol, which
1530 indiciates that stdio has a symbol to print long doubles.
1531 The 'U' in the name is to separate this from d_PRIfldbl so that even
1532 case-blind systems can see the difference.
1534 d_PRIgldbl (longdblfio.U):
1535 This variable conditionally defines the PERL_PRIfldbl symbol, which
1536 indiciates that stdio has a symbol to print long doubles.
1538 d_PRIGUldbl (longdblfio.U):
1539 This variable conditionally defines the PERL_PRIfldbl symbol, which
1540 indiciates that stdio has a symbol to print long doubles.
1541 The 'U' in the name is to separate this from d_PRIgldbl so that even
1542 case-blind systems can see the difference.
1544 d_PRIi64 (quadfio.U):
1545 This variable conditionally defines the PERL_PRIi64 symbol, which
1546 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1548 d_printf_format_null (d_attribut.U):
1549 This variable conditionally defines PRINTF_FORMAT_NULL_OK, which
1550 indicates the C compiler allows printf-like formats to be null.
1552 d_PRIo64 (quadfio.U):
1553 This variable conditionally defines the PERL_PRIo64 symbol, which
1554 indiciates that stdio has a symbol to print 64-bit octal numbers.
1556 d_PRIu64 (quadfio.U):
1557 This variable conditionally defines the PERL_PRIu64 symbol, which
1558 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1561 d_PRIx64 (quadfio.U):
1562 This variable conditionally defines the PERL_PRIx64 symbol, which
1563 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1565 d_PRIXU64 (quadfio.U):
1566 This variable conditionally defines the PERL_PRIXU64 symbol, which
1567 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1568 The 'U' in the name is to separate this from d_PRIx64 so that even
1569 case-blind systems can see the difference.
1571 d_procselfexe (d_procselfexe.U):
1572 Defined if $procselfexe is symlink to the absolute
1573 pathname of the executing program.
1575 d_pseudofork (d_vfork.U):
1576 This variable conditionally defines the HAS_PSEUDOFORK symbol,
1577 which indicates that an emulation of the fork routine is available.
1579 d_pthread_atfork (d_pthread_atfork.U):
1580 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1581 which indicates to the C program that the pthread_atfork()
1582 routine is available.
1584 d_pthread_attr_setscope (d_pthread_attr_ss.U):
1585 This variable conditionally defines HAS_PTHREAD_ATTR_SETSCOPE if
1586 pthread_attr_setscope() is available to set the contention scope
1587 attribute of a thread attribute object.
1589 d_pthread_yield (d_pthread_y.U):
1590 This variable conditionally defines the HAS_PTHREAD_YIELD
1591 symbol if the pthread_yield routine is available to yield
1592 the execution of the current thread.
1595 This variable conditionally defines PWAGE, which indicates
1596 that struct passwd contains pw_age.
1598 d_pwchange (i_pwd.U):
1599 This variable conditionally defines PWCHANGE, which indicates
1600 that struct passwd contains pw_change.
1602 d_pwclass (i_pwd.U):
1603 This variable conditionally defines PWCLASS, which indicates
1604 that struct passwd contains pw_class.
1606 d_pwcomment (i_pwd.U):
1607 This variable conditionally defines PWCOMMENT, which indicates
1608 that struct passwd contains pw_comment.
1610 d_pwexpire (i_pwd.U):
1611 This variable conditionally defines PWEXPIRE, which indicates
1612 that struct passwd contains pw_expire.
1614 d_pwgecos (i_pwd.U):
1615 This variable conditionally defines PWGECOS, which indicates
1616 that struct passwd contains pw_gecos.
1618 d_pwpasswd (i_pwd.U):
1619 This variable conditionally defines PWPASSWD, which indicates
1620 that struct passwd contains pw_passwd.
1622 d_pwquota (i_pwd.U):
1623 This variable conditionally defines PWQUOTA, which indicates
1624 that struct passwd contains pw_quota.
1626 d_qgcvt (d_qgcvt.U):
1627 This variable conditionally defines the HAS_QGCVT symbol, which
1628 indicates to the C program that the qgcvt() routine is available.
1630 d_quad (quadtype.U):
1631 This variable, if defined, tells that there's a 64-bit integer type,
1634 d_random_r (d_random_r.U):
1635 This variable conditionally defines the HAS_RANDOM_R symbol,
1636 which indicates to the C program that the random_r()
1637 routine is available.
1639 d_readdir (d_readdir.U):
1640 This variable conditionally defines HAS_READDIR if readdir() is
1641 available to read directory entries.
1643 d_readdir64_r (d_readdir64_r.U):
1644 This variable conditionally defines the HAS_READDIR64_R symbol,
1645 which indicates to the C program that the readdir64_r()
1646 routine is available.
1648 d_readdir_r (d_readdir_r.U):
1649 This variable conditionally defines the HAS_READDIR_R symbol,
1650 which indicates to the C program that the readdir_r()
1651 routine is available.
1653 d_readlink (d_readlink.U):
1654 This variable conditionally defines the HAS_READLINK symbol, which
1655 indicates to the C program that the readlink() routine is available
1656 to read the value of a symbolic link.
1658 d_readv (d_readv.U):
1659 This variable conditionally defines the HAS_READV symbol, which
1660 indicates to the C program that the readv() routine is available.
1662 d_recvmsg (d_recvmsg.U):
1663 This variable conditionally defines the HAS_RECVMSG symbol, which
1664 indicates to the C program that the recvmsg() routine is available.
1666 d_rename (d_rename.U):
1667 This variable conditionally defines the HAS_RENAME symbol, which
1668 indicates to the C program that the rename() routine is available
1671 d_rewinddir (d_readdir.U):
1672 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1675 d_rmdir (d_rmdir.U):
1676 This variable conditionally defines HAS_RMDIR if rmdir() is
1677 available to remove directories.
1679 d_safebcpy (d_safebcpy.U):
1680 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1681 the bcopy() routine can do overlapping copies. Normally, you
1682 should probably use memmove().
1684 d_safemcpy (d_safemcpy.U):
1685 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1686 the memcpy() routine can do overlapping copies.
1687 For overlapping copies, memmove() should be used, if available.
1689 d_sanemcmp (d_sanemcmp.U):
1690 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1691 the memcpy() routine is available and can be used to compare relative
1692 magnitudes of chars with their high bits set.
1694 d_sbrkproto (d_sbrkproto.U):
1695 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1696 which indicates to the C program that the system provides
1697 a prototype for the sbrk() function. Otherwise, it is
1698 up to the program to supply one.
1700 d_scalbnl (d_scalbnl.U):
1701 This variable conditionally defines the HAS_SCALBNL symbol, which
1702 indicates to the C program that the scalbnl() routine is available.
1703 If ilogbl is also present we can emulate frexpl.
1705 d_sched_yield (d_pthread_y.U):
1706 This variable conditionally defines the HAS_SCHED_YIELD
1707 symbol if the sched_yield routine is available to yield
1708 the execution of the current thread.
1710 d_scm_rights (d_socket.U):
1711 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1712 which indicates that the SCM_RIGHTS is available. #ifdef is
1713 not enough because it may be an enum, glibc has been known to do this.
1715 d_SCNfldbl (longdblfio.U):
1716 This variable conditionally defines the PERL_PRIfldbl symbol, which
1717 indiciates that stdio has a symbol to scan long doubles.
1719 d_seekdir (d_readdir.U):
1720 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1723 d_select (d_select.U):
1724 This variable conditionally defines HAS_SELECT if select() is
1725 available to select active file descriptors. A <sys/time.h>
1726 inclusion may be necessary for the timeout field.
1729 This variable conditionally defines the HAS_SEM symbol, which
1730 indicates that the entire sem*(2) library is present.
1732 d_semctl (d_semctl.U):
1733 This variable conditionally defines the HAS_SEMCTL symbol, which
1734 indicates to the C program that the semctl() routine is available.
1736 d_semctl_semid_ds (d_union_semun.U):
1737 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1738 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1740 d_semctl_semun (d_union_semun.U):
1741 This variable conditionally defines USE_SEMCTL_SEMUN, which
1742 indicates that union semun is to be used for semctl IPC_STAT.
1744 d_semget (d_semget.U):
1745 This variable conditionally defines the HAS_SEMGET symbol, which
1746 indicates to the C program that the semget() routine is available.
1748 d_semop (d_semop.U):
1749 This variable conditionally defines the HAS_SEMOP symbol, which
1750 indicates to the C program that the semop() routine is available.
1752 d_sendmsg (d_sendmsg.U):
1753 This variable conditionally defines the HAS_SENDMSG symbol, which
1754 indicates to the C program that the sendmsg() routine is available.
1756 d_setegid (d_setegid.U):
1757 This variable conditionally defines the HAS_SETEGID symbol, which
1758 indicates to the C program that the setegid() routine is available
1759 to change the effective gid of the current program.
1761 d_seteuid (d_seteuid.U):
1762 This variable conditionally defines the HAS_SETEUID symbol, which
1763 indicates to the C program that the seteuid() routine is available
1764 to change the effective uid of the current program.
1766 d_setgrent (d_setgrent.U):
1767 This variable conditionally defines the HAS_SETGRENT symbol, which
1768 indicates to the C program that the setgrent() routine is available
1769 for initializing sequential access to the group database.
1771 d_setgrent_r (d_setgrent_r.U):
1772 This variable conditionally defines the HAS_SETGRENT_R symbol,
1773 which indicates to the C program that the setgrent_r()
1774 routine is available.
1776 d_setgrps (d_setgrps.U):
1777 This variable conditionally defines the HAS_SETGROUPS symbol, which
1778 indicates to the C program that the setgroups() routine is available
1779 to set the list of process groups.
1781 d_sethent (d_sethent.U):
1782 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1785 d_sethostent_r (d_sethostent_r.U):
1786 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
1787 which indicates to the C program that the sethostent_r()
1788 routine is available.
1790 d_setitimer (d_setitimer.U):
1791 This variable conditionally defines the HAS_SETITIMER symbol, which
1792 indicates to the C program that the setitimer() routine is available.
1794 d_setlinebuf (d_setlnbuf.U):
1795 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1796 indicates to the C program that the setlinebuf() routine is available
1797 to change stderr or stdout from block-buffered or unbuffered to a
1800 d_setlocale (d_setlocale.U):
1801 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1802 available to handle locale-specific ctype implementations.
1804 d_setlocale_r (d_setlocale_r.U):
1805 This variable conditionally defines the HAS_SETLOCALE_R symbol,
1806 which indicates to the C program that the setlocale_r()
1807 routine is available.
1809 d_setnent (d_setnent.U):
1810 This variable conditionally defines HAS_SETNETENT if setnetent() is
1813 d_setnetent_r (d_setnetent_r.U):
1814 This variable conditionally defines the HAS_SETNETENT_R symbol,
1815 which indicates to the C program that the setnetent_r()
1816 routine is available.
1818 d_setpent (d_setpent.U):
1819 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1822 d_setpgid (d_setpgid.U):
1823 This variable conditionally defines the HAS_SETPGID symbol if the
1824 setpgid(pid, gpid) function is available to set process group ID.
1826 d_setpgrp (d_setpgrp.U):
1827 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1828 available to set the current process group.
1830 d_setpgrp2 (d_setpgrp2.U):
1831 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1832 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1833 is available to set the current process group.
1835 d_setprior (d_setprior.U):
1836 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1837 is available to set a process's priority.
1839 d_setproctitle (d_setproctitle.U):
1840 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1841 which indicates to the C program that the setproctitle() routine
1844 d_setprotoent_r (d_setprotoent_r.U):
1845 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
1846 which indicates to the C program that the setprotoent_r()
1847 routine is available.
1849 d_setpwent (d_setpwent.U):
1850 This variable conditionally defines the HAS_SETPWENT symbol, which
1851 indicates to the C program that the setpwent() routine is available
1852 for initializing sequential access to the passwd database.
1854 d_setpwent_r (d_setpwent_r.U):
1855 This variable conditionally defines the HAS_SETPWENT_R symbol,
1856 which indicates to the C program that the setpwent_r()
1857 routine is available.
1859 d_setregid (d_setregid.U):
1860 This variable conditionally defines HAS_SETREGID if setregid() is
1861 available to change the real and effective gid of the current
1864 d_setresgid (d_setregid.U):
1865 This variable conditionally defines HAS_SETRESGID if setresgid() is
1866 available to change the real, effective and saved gid of the current
1869 d_setresuid (d_setreuid.U):
1870 This variable conditionally defines HAS_SETREUID if setresuid() is
1871 available to change the real, effective and saved uid of the current
1874 d_setreuid (d_setreuid.U):
1875 This variable conditionally defines HAS_SETREUID if setreuid() is
1876 available to change the real and effective uid of the current
1879 d_setrgid (d_setrgid.U):
1880 This variable conditionally defines the HAS_SETRGID symbol, which
1881 indicates to the C program that the setrgid() routine is available
1882 to change the real gid of the current program.
1884 d_setruid (d_setruid.U):
1885 This variable conditionally defines the HAS_SETRUID symbol, which
1886 indicates to the C program that the setruid() routine is available
1887 to change the real uid of the current program.
1889 d_setsent (d_setsent.U):
1890 This variable conditionally defines HAS_SETSERVENT if setservent() is
1893 d_setservent_r (d_setservent_r.U):
1894 This variable conditionally defines the HAS_SETSERVENT_R symbol,
1895 which indicates to the C program that the setservent_r()
1896 routine is available.
1898 d_setsid (d_setsid.U):
1899 This variable conditionally defines HAS_SETSID if setsid() is
1900 available to set the process group ID.
1902 d_setvbuf (d_setvbuf.U):
1903 This variable conditionally defines the HAS_SETVBUF symbol, which
1904 indicates to the C program that the setvbuf() routine is available
1905 to change buffering on an open stdio stream.
1908 This variable conditionally defines the USE_SFIO symbol,
1909 and indicates whether sfio is available (and should be used).
1912 This variable conditionally defines the HAS_SHM symbol, which
1913 indicates that the entire shm*(2) library is present.
1915 d_shmat (d_shmat.U):
1916 This variable conditionally defines the HAS_SHMAT symbol, which
1917 indicates to the C program that the shmat() routine is available.
1919 d_shmatprototype (d_shmat.U):
1920 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1921 symbol, which indicates that sys/shm.h has a prototype for
1924 d_shmctl (d_shmctl.U):
1925 This variable conditionally defines the HAS_SHMCTL symbol, which
1926 indicates to the C program that the shmctl() routine is available.
1928 d_shmdt (d_shmdt.U):
1929 This variable conditionally defines the HAS_SHMDT symbol, which
1930 indicates to the C program that the shmdt() routine is available.
1932 d_shmget (d_shmget.U):
1933 This variable conditionally defines the HAS_SHMGET symbol, which
1934 indicates to the C program that the shmget() routine is available.
1936 d_sigaction (d_sigaction.U):
1937 This variable conditionally defines the HAS_SIGACTION symbol, which
1938 indicates that the Vr4 sigaction() routine is available.
1940 d_sigprocmask (d_sigprocmask.U):
1941 This variable conditionally defines HAS_SIGPROCMASK
1942 if sigprocmask() is available to examine or change the signal mask
1943 of the calling process.
1945 d_sigsetjmp (d_sigsetjmp.U):
1946 This variable conditionally defines the HAS_SIGSETJMP symbol,
1947 which indicates that the sigsetjmp() routine is available to
1948 call setjmp() and optionally save the process's signal mask.
1950 d_sitearch (sitearch.U):
1951 This variable conditionally defines SITEARCH to hold the pathname
1952 of architecture-dependent library files for $package. If
1953 $sitearch is the same as $archlib, then this is set to undef.
1955 d_snprintf (d_snprintf.U):
1956 This variable conditionally defines the HAS_SNPRINTF symbol, which
1957 indicates to the C program that the snprintf () library function
1960 d_sockatmark (d_sockatmark.U):
1961 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1962 indicates to the C program that the sockatmark() routine is available.
1964 d_sockatmarkproto (d_sockatmarkproto.U):
1965 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1966 which indicates to the C program that the system provides
1967 a prototype for the sockatmark() function. Otherwise, it is
1968 up to the program to supply one.
1970 d_socket (d_socket.U):
1971 This variable conditionally defines HAS_SOCKET, which indicates
1972 that the BSD socket interface is supported.
1974 d_socklen_t (d_socklen_t.U):
1975 This symbol will be defined if the C compiler supports socklen_t.
1977 d_sockpair (d_socket.U):
1978 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1979 indicates that the BSD socketpair() is supported.
1981 d_socks5_init (d_socks5_init.U):
1982 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1983 indicates to the C program that the socks5_init() routine is available.
1985 d_sprintf_returns_strlen (d_sprintf_len.U):
1986 This variable defines whether sprintf returns the length of the string
1987 (as per the ANSI spec). Some C libraries retain compatibility with
1988 pre-ANSI C and return a pointer to the passed in buffer; for these
1989 this variable will be undef.
1991 d_sqrtl (d_sqrtl.U):
1992 This variable conditionally defines the HAS_SQRTL symbol, which
1993 indicates to the C program that the sqrtl() routine is available.
1995 d_srand48_r (d_srand48_r.U):
1996 This variable conditionally defines the HAS_SRAND48_R symbol,
1997 which indicates to the C program that the srand48_r()
1998 routine is available.
2000 d_srandom_r (d_srandom_r.U):
2001 This variable conditionally defines the HAS_SRANDOM_R symbol,
2002 which indicates to the C program that the srandom_r()
2003 routine is available.
2005 d_sresgproto (d_sresgproto.U):
2006 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
2007 which indicates to the C program that the system provides
2008 a prototype for the setresgid() function. Otherwise, it is
2009 up to the program to supply one.
2011 d_sresuproto (d_sresuproto.U):
2012 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
2013 which indicates to the C program that the system provides
2014 a prototype for the setresuid() function. Otherwise, it is
2015 up to the program to supply one.
2017 d_statblks (d_statblks.U):
2018 This variable conditionally defines USE_STAT_BLOCKS
2019 if this system has a stat structure declaring
2020 st_blksize and st_blocks.
2022 d_statfs_f_flags (d_statfs_f_flags.U):
2023 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
2024 symbol, which indicates to struct statfs from has f_flags member.
2025 This kind of struct statfs is coming from sys/mount.h (BSD),
2026 not from sys/statfs.h (SYSV).
2028 d_statfs_s (d_statfs_s.U):
2029 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
2030 which indicates that the struct statfs is supported.
2032 d_statvfs (d_statvfs.U):
2033 This variable conditionally defines the HAS_STATVFS symbol, which
2034 indicates to the C program that the statvfs() routine is available.
2036 d_stdio_cnt_lval (d_stdstdio.U):
2037 This variable conditionally defines STDIO_CNT_LVALUE if the
2038 FILE_cnt macro can be used as an lvalue.
2040 d_stdio_ptr_lval (d_stdstdio.U):
2041 This variable conditionally defines STDIO_PTR_LVALUE if the
2042 FILE_ptr macro can be used as an lvalue.
2044 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
2045 This symbol is defined if using the FILE_ptr macro as an lvalue
2046 to increase the pointer by n leaves File_cnt(fp) unchanged.
2048 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
2049 This symbol is defined if using the FILE_ptr macro as an lvalue
2050 to increase the pointer by n has the side effect of decreasing the
2051 value of File_cnt(fp) by n.
2053 d_stdio_stream_array (stdio_streams.U):
2054 This variable tells whether there is an array holding
2057 d_stdiobase (d_stdstdio.U):
2058 This variable conditionally defines USE_STDIO_BASE if this system
2059 has a FILE structure declaring a usable _base field (or equivalent)
2062 d_stdstdio (d_stdstdio.U):
2063 This variable conditionally defines USE_STDIO_PTR if this system
2064 has a FILE structure declaring usable _ptr and _cnt fields (or
2065 equivalent) in stdio.h.
2067 d_strchr (d_strchr.U):
2068 This variable conditionally defines HAS_STRCHR if strchr() and
2069 strrchr() are available for string searching.
2071 d_strcoll (d_strcoll.U):
2072 This variable conditionally defines HAS_STRCOLL if strcoll() is
2073 available to compare strings using collating information.
2075 d_strctcpy (d_strctcpy.U):
2076 This variable conditionally defines the USE_STRUCT_COPY symbol, which
2077 indicates to the C program that this C compiler knows how to copy
2080 d_strerrm (d_strerror.U):
2081 This variable holds what Strerrr is defined as to translate an error
2082 code condition into an error message string. It could be 'strerror'
2083 or a more complex macro emulating strrror with sys_errlist[], or the
2084 "unknown" string when both strerror and sys_errlist are missing.
2086 d_strerror (d_strerror.U):
2087 This variable conditionally defines HAS_STRERROR if strerror() is
2088 available to translate error numbers to strings.
2090 d_strerror_r (d_strerror_r.U):
2091 This variable conditionally defines the HAS_STRERROR_R symbol,
2092 which indicates to the C program that the strerror_r()
2093 routine is available.
2095 d_strftime (d_strftime.U):
2096 This variable conditionally defines the HAS_STRFTIME symbol, which
2097 indicates to the C program that the strftime() routine is available.
2099 d_strlcat (d_strlcat.U):
2100 This variable conditionally defines the HAS_STRLCAT symbol, which
2101 indicates to the C program that the strlcat () routine is available.
2103 d_strlcpy (d_strlcpy.U):
2104 This variable conditionally defines the HAS_STRLCPY symbol, which
2105 indicates to the C program that the strlcpy () routine is available.
2107 d_strtod (d_strtod.U):
2108 This variable conditionally defines the HAS_STRTOD symbol, which
2109 indicates to the C program that the strtod() routine is available
2110 to provide better numeric string conversion than atof().
2112 d_strtol (d_strtol.U):
2113 This variable conditionally defines the HAS_STRTOL symbol, which
2114 indicates to the C program that the strtol() routine is available
2115 to provide better numeric string conversion than atoi() and friends.
2117 d_strtold (d_strtold.U):
2118 This variable conditionally defines the HAS_STRTOLD symbol, which
2119 indicates to the C program that the strtold() routine is available.
2121 d_strtoll (d_strtoll.U):
2122 This variable conditionally defines the HAS_STRTOLL symbol, which
2123 indicates to the C program that the strtoll() routine is available.
2125 d_strtoq (d_strtoq.U):
2126 This variable conditionally defines the HAS_STRTOQ symbol, which
2127 indicates to the C program that the strtoq() routine is available.
2129 d_strtoul (d_strtoul.U):
2130 This variable conditionally defines the HAS_STRTOUL symbol, which
2131 indicates to the C program that the strtoul() routine is available
2132 to provide conversion of strings to unsigned long.
2134 d_strtoull (d_strtoull.U):
2135 This variable conditionally defines the HAS_STRTOULL symbol, which
2136 indicates to the C program that the strtoull() routine is available.
2138 d_strtouq (d_strtouq.U):
2139 This variable conditionally defines the HAS_STRTOUQ symbol, which
2140 indicates to the C program that the strtouq() routine is available.
2142 d_strxfrm (d_strxfrm.U):
2143 This variable conditionally defines HAS_STRXFRM if strxfrm() is
2144 available to transform strings.
2146 d_suidsafe (d_dosuid.U):
2147 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
2148 if setuid scripts can be secure. This test looks in /dev/fd/.
2150 d_symlink (d_symlink.U):
2151 This variable conditionally defines the HAS_SYMLINK symbol, which
2152 indicates to the C program that the symlink() routine is available
2153 to create symbolic links.
2155 d_syscall (d_syscall.U):
2156 This variable conditionally defines HAS_SYSCALL if syscall() is
2157 available call arbitrary system calls.
2159 d_syscallproto (d_syscallproto.U):
2160 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
2161 which indicates to the C program that the system provides
2162 a prototype for the syscall() function. Otherwise, it is
2163 up to the program to supply one.
2165 d_sysconf (d_sysconf.U):
2166 This variable conditionally defines the HAS_SYSCONF symbol, which
2167 indicates to the C program that the sysconf() routine is available
2168 to determine system related limits and options.
2170 d_sysernlst (d_strerror.U):
2171 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
2172 is available to translate error numbers to the symbolic name.
2174 d_syserrlst (d_strerror.U):
2175 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
2176 available to translate error numbers to strings.
2178 d_system (d_system.U):
2179 This variable conditionally defines HAS_SYSTEM if system() is
2180 available to issue a shell command.
2182 d_tcgetpgrp (d_tcgtpgrp.U):
2183 This variable conditionally defines the HAS_TCGETPGRP symbol, which
2184 indicates to the C program that the tcgetpgrp() routine is available.
2185 to get foreground process group ID.
2187 d_tcsetpgrp (d_tcstpgrp.U):
2188 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2189 indicates to the C program that the tcsetpgrp() routine is available
2190 to set foreground process group ID.
2192 d_telldir (d_readdir.U):
2193 This variable conditionally defines HAS_TELLDIR if telldir() is
2196 d_telldirproto (d_telldirproto.U):
2197 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2198 which indicates to the C program that the system provides
2199 a prototype for the telldir() function. Otherwise, it is
2200 up to the program to supply one.
2203 This variable conditionally defines the HAS_TIME symbol, which indicates
2204 that the time() routine exists. The time() routine is normaly
2205 provided on UNIX systems.
2207 d_times (d_times.U):
2208 This variable conditionally defines the HAS_TIMES symbol, which indicates
2209 that the times() routine exists. The times() routine is normaly
2210 provided on UNIX systems. You may have to include <sys/times.h>.
2212 d_tm_tm_gmtoff (i_time.U):
2213 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2214 indicates to the C program that the struct tm has the tm_gmtoff field.
2216 d_tm_tm_zone (i_time.U):
2217 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2218 indicates to the C program that the struct tm has the tm_zone field.
2220 d_tmpnam_r (d_tmpnam_r.U):
2221 This variable conditionally defines the HAS_TMPNAM_R symbol,
2222 which indicates to the C program that the tmpnam_r()
2223 routine is available.
2225 d_truncate (d_truncate.U):
2226 This variable conditionally defines HAS_TRUNCATE if truncate() is
2227 available to truncate files.
2229 d_ttyname_r (d_ttyname_r.U):
2230 This variable conditionally defines the HAS_TTYNAME_R symbol,
2231 which indicates to the C program that the ttyname_r()
2232 routine is available.
2234 d_tzname (d_tzname.U):
2235 This variable conditionally defines HAS_TZNAME if tzname[] is
2236 available to access timezone names.
2238 d_u32align (d_u32align.U):
2239 This variable tells whether you must access character data
2240 through U32-aligned pointers.
2242 d_ualarm (d_ualarm.U):
2243 This variable conditionally defines the HAS_UALARM symbol, which
2244 indicates to the C program that the ualarm() routine is available.
2246 d_umask (d_umask.U):
2247 This variable conditionally defines the HAS_UMASK symbol, which
2248 indicates to the C program that the umask() routine is available.
2249 to set and get the value of the file creation mask.
2251 d_uname (d_gethname.U):
2252 This variable conditionally defines the HAS_UNAME symbol, which
2253 indicates to the C program that the uname() routine may be
2254 used to derive the host name.
2256 d_union_semun (d_union_semun.U):
2257 This variable conditionally defines HAS_UNION_SEMUN if the
2258 union semun is defined by including <sys/sem.h>.
2260 d_unordered (d_unordered.U):
2261 This variable conditionally defines the HAS_UNORDERED symbol, which
2262 indicates to the C program that the unordered() routine is available.
2264 d_unsetenv (d_unsetenv.U):
2265 This variable conditionally defines the HAS_UNSETENV symbol, which
2266 indicates to the C program that the unsetenv () routine is available.
2268 d_usleep (d_usleep.U):
2269 This variable conditionally defines HAS_USLEEP if usleep() is
2270 available to do high granularity sleeps.
2272 d_usleepproto (d_usleepproto.U):
2273 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2274 which indicates to the C program that the system provides
2275 a prototype for the usleep() function. Otherwise, it is
2276 up to the program to supply one.
2278 d_ustat (d_ustat.U):
2279 This variable conditionally defines HAS_USTAT if ustat() is
2280 available to query file system statistics by dev_t.
2282 d_vendorarch (vendorarch.U):
2283 This variable conditionally defined PERL_VENDORARCH.
2285 d_vendorbin (vendorbin.U):
2286 This variable conditionally defines PERL_VENDORBIN.
2288 d_vendorlib (vendorlib.U):
2289 This variable conditionally defines PERL_VENDORLIB.
2291 d_vendorscript (vendorscript.U):
2292 This variable conditionally defines PERL_VENDORSCRIPT.
2294 d_vfork (d_vfork.U):
2295 This variable conditionally defines the HAS_VFORK symbol, which
2296 indicates the vfork() routine is available.
2298 d_void_closedir (d_closedir.U):
2299 This variable conditionally defines VOID_CLOSEDIR if closedir()
2300 does not return a value.
2302 d_voidsig (d_voidsig.U):
2303 This variable conditionally defines VOIDSIG if this system
2304 declares "void (*signal(...))()" in signal.h. The old way was to
2305 declare it as "int (*signal(...))()".
2307 d_voidtty (i_sysioctl.U):
2308 This variable conditionally defines USE_IOCNOTTY to indicate that the
2309 ioctl() call with TIOCNOTTY should be used to void tty association.
2310 Otherwise (on USG probably), it is enough to close the standard file
2311 decriptors and do a setpgrp().
2313 d_volatile (d_volatile.U):
2314 This variable conditionally defines the HASVOLATILE symbol, which
2315 indicates to the C program that this C compiler knows about the
2316 volatile declaration.
2318 d_vprintf (d_vprintf.U):
2319 This variable conditionally defines the HAS_VPRINTF symbol, which
2320 indicates to the C program that the vprintf() routine is available
2321 to printf with a pointer to an argument list.
2323 d_vsnprintf (d_snprintf.U):
2324 This variable conditionally defines the HAS_VSNPRINTF symbol, which
2325 indicates to the C program that the vsnprintf () library function
2328 d_wait4 (d_wait4.U):
2329 This variable conditionally defines the HAS_WAIT4 symbol, which
2330 indicates the wait4() routine is available.
2332 d_waitpid (d_waitpid.U):
2333 This variable conditionally defines HAS_WAITPID if waitpid() is
2334 available to wait for child process.
2336 d_wcstombs (d_wcstombs.U):
2337 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2338 indicates to the C program that the wcstombs() routine is available
2339 to convert wide character strings to multibyte strings.
2341 d_wctomb (d_wctomb.U):
2342 This variable conditionally defines the HAS_WCTOMB symbol, which
2343 indicates to the C program that the wctomb() routine is available
2344 to convert a wide character to a multibyte.
2346 d_writev (d_writev.U):
2347 This variable conditionally defines the HAS_WRITEV symbol, which
2348 indicates to the C program that the writev() routine is available.
2351 This variable conditionally defines the symbol XENIX, which alerts
2352 the C program that it runs under Xenix.
2355 This variable is used internally by Configure to determine the
2356 full pathname (if any) of the date program. After Configure runs,
2357 the value is reset to a plain "date" and is not useful.
2359 db_hashtype (i_db.U):
2360 This variable contains the type of the hash structure element
2361 in the <db.h> header file. In older versions of DB, it was
2362 int, while in newer ones it is u_int32_t.
2364 db_prefixtype (i_db.U):
2365 This variable contains the type of the prefix structure element
2366 in the <db.h> header file. In older versions of DB, it was
2367 int, while in newer ones it is size_t.
2369 db_version_major (i_db.U):
2370 This variable contains the major version number of
2371 Berkeley DB found in the <db.h> header file.
2373 db_version_minor (i_db.U):
2374 This variable contains the minor version number of
2375 Berkeley DB found in the <db.h> header file.
2376 For DB version 1 this is always 0.
2378 db_version_patch (i_db.U):
2379 This variable contains the patch version number of
2380 Berkeley DB found in the <db.h> header file.
2381 For DB version 1 this is always 0.
2383 defvoidused (voidflags.U):
2384 This variable contains the default value of the VOIDUSED symbol (15).
2386 direntrytype (i_dirent.U):
2387 This symbol is set to 'struct direct' or 'struct dirent' depending on
2388 whether dirent is available or not. You should use this pseudo type to
2389 portably declare your directory entries.
2392 This variable contains the extension that is to be used for the
2393 dynamically loaded modules that perl generaties.
2396 This variable contains the name of the dynamic loading file that
2397 will be used with the package.
2399 doublesize (doublesize.U):
2400 This variable contains the value of the DOUBLESIZE symbol, which
2401 indicates to the C program how many bytes there are in a double.
2403 drand01 (randfunc.U):
2404 Indicates the macro to be used to generate normalized
2405 random numbers. Uses randfunc, often divided by
2406 (double) (((unsigned long) 1 << randbits)) in order to
2407 normalize the result.
2408 In C programs, the macro 'Drand01' is mapped to drand01.
2410 drand48_r_proto (d_drand48_r.U):
2411 This variable encodes the prototype of drand48_r.
2412 It is zero if d_drand48_r is undef, and one of the
2413 REENTRANT_PROTO_T_ABC macros of reentr.h if d_drand48_r
2416 dynamic_ext (Extensions.U):
2417 This variable holds a list of XS extension files we want to
2418 link dynamically into the package. It is used by Makefile.
2420 eagain (nblock_io.U):
2421 This variable bears the symbolic errno code set by read() when no
2422 data is present on the file and non-blocking I/O was enabled (otherwise,
2423 read() blocks naturally).
2426 This variable conditionally defines EBCDIC if this
2427 system uses EBCDIC encoding. Among other things, this
2428 means that the character ranges are not contiguous.
2432 This variable is used internally by Configure to determine the
2433 full pathname (if any) of the echo program. After Configure runs,
2434 the value is reset to a plain "echo" and is not useful.
2437 This variable is used internally by Configure to determine the
2438 full pathname (if any) of the egrep program. After Configure runs,
2439 the value is reset to a plain "egrep" and is not useful.
2442 This variable is defined but not used by Configure.
2443 The value is a plain '' and is not useful.
2445 endgrent_r_proto (d_endgrent_r.U):
2446 This variable encodes the prototype of endgrent_r.
2447 It is zero if d_endgrent_r is undef, and one of the
2448 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endgrent_r
2451 endhostent_r_proto (d_endhostent_r.U):
2452 This variable encodes the prototype of endhostent_r.
2453 It is zero if d_endhostent_r is undef, and one of the
2454 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endhostent_r
2457 endnetent_r_proto (d_endnetent_r.U):
2458 This variable encodes the prototype of endnetent_r.
2459 It is zero if d_endnetent_r is undef, and one of the
2460 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endnetent_r
2463 endprotoent_r_proto (d_endprotoent_r.U):
2464 This variable encodes the prototype of endprotoent_r.
2465 It is zero if d_endprotoent_r is undef, and one of the
2466 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endprotoent_r
2469 endpwent_r_proto (d_endpwent_r.U):
2470 This variable encodes the prototype of endpwent_r.
2471 It is zero if d_endpwent_r is undef, and one of the
2472 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endpwent_r
2475 endservent_r_proto (d_endservent_r.U):
2476 This variable encodes the prototype of endservent_r.
2477 It is zero if d_endservent_r is undef, and one of the
2478 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endservent_r
2482 When running under Eunice this variable contains a command which will
2483 convert a shell script to the proper form of text file for it to be
2484 executable by the shell. On other systems it is a no-op.
2487 This is an old synonym for _exe.
2490 This variable is used internally by Configure to determine the
2491 full pathname (if any) of the expr program. After Configure runs,
2492 the value is reset to a plain "expr" and is not useful.
2494 extensions (Extensions.U):
2495 This variable holds a list of all extension files (both XS and
2496 non-xs linked into the package. It is propagated to Config.pm
2497 and is typically used to test whether a particular extesion
2501 This variable holds a list of extra modules to install.
2503 fflushall (fflushall.U):
2504 This symbol, if defined, tells that to flush
2505 all pending stdio output one must loop through all
2506 the stdio file handles stored in an array and fflush them.
2507 Note that if fflushNULL is defined, fflushall will not
2508 even be probed for and will be left undefined.
2510 fflushNULL (fflushall.U):
2511 This symbol, if defined, tells that fflush(NULL) does flush
2512 all pending stdio output.
2515 This variable is defined but not used by Configure.
2516 The value is a plain '' and is not useful.
2518 firstmakefile (Unix.U):
2519 This variable defines the first file searched by make. On unix,
2520 it is makefile (then Makefile). On case-insensitive systems,
2521 it might be something else. This is only used to deal with
2522 convoluted make depend tricks.
2525 This variable is defined but not used by Configure.
2526 The value is a plain '' and is not useful.
2528 fpossize (fpossize.U):
2529 This variable contains the size of a fpostype in bytes.
2531 fpostype (fpostype.U):
2532 This variable defines Fpos_t to be something like fpos_t, long,
2533 uint, or whatever type is used to declare file positions in libc.
2535 freetype (mallocsrc.U):
2536 This variable contains the return type of free(). It is usually
2537 void, but occasionally int.
2540 This variable contains the command used by Configure
2541 to copy files from the target host. Useful and available
2542 only during Perl build.
2543 The string ':' if not cross-compiling.
2546 This variable contains the full pathname to 'ar', whether or
2547 not the user has specified 'portability'. This is only used
2551 This variable contains the full pathname to 'csh', whether or
2552 not the user has specified 'portability'. This is only used
2553 in the compiled C program, and we assume that all systems which
2554 can share this executable will have the same full pathname to
2557 full_sed (Loc_sed.U):
2558 This variable contains the full pathname to 'sed', whether or
2559 not the user has specified 'portability'. This is only used
2560 in the compiled C program, and we assume that all systems which
2561 can share this executable will have the same full pathname to
2564 gccansipedantic (gccvers.U):
2565 If GNU cc (gcc) is used, this variable will enable (if set) the
2566 -ansi and -pedantic ccflags for building core files (through
2567 cflags script). (See Porting/pumpkin.pod for full description).
2569 gccosandvers (gccvers.U):
2570 If GNU cc (gcc) is used, this variable holds the operating system
2571 and version used to compile gcc. It is set to '' if not gcc,
2572 or if nothing useful can be parsed as the os version.
2574 gccversion (gccvers.U):
2575 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2576 indicate whether the compiler is version 1 or 2. This is used in
2577 setting some of the default cflags. It is set to '' if not gcc.
2579 getgrent_r_proto (d_getgrent_r.U):
2580 This variable encodes the prototype of getgrent_r.
2581 It is zero if d_getgrent_r is undef, and one of the
2582 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrent_r
2585 getgrgid_r_proto (d_getgrgid_r.U):
2586 This variable encodes the prototype of getgrgid_r.
2587 It is zero if d_getgrgid_r is undef, and one of the
2588 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrgid_r
2591 getgrnam_r_proto (d_getgrnam_r.U):
2592 This variable encodes the prototype of getgrnam_r.
2593 It is zero if d_getgrnam_r is undef, and one of the
2594 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrnam_r
2597 gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
2598 This variable encodes the prototype of gethostbyaddr_r.
2599 It is zero if d_gethostbyaddr_r is undef, and one of the
2600 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyaddr_r
2603 gethostbyname_r_proto (d_gethostbyname_r.U):
2604 This variable encodes the prototype of gethostbyname_r.
2605 It is zero if d_gethostbyname_r is undef, and one of the
2606 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyname_r
2609 gethostent_r_proto (d_gethostent_r.U):
2610 This variable encodes the prototype of gethostent_r.
2611 It is zero if d_gethostent_r is undef, and one of the
2612 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostent_r
2615 getlogin_r_proto (d_getlogin_r.U):
2616 This variable encodes the prototype of getlogin_r.
2617 It is zero if d_getlogin_r is undef, and one of the
2618 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getlogin_r
2621 getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
2622 This variable encodes the prototype of getnetbyaddr_r.
2623 It is zero if d_getnetbyaddr_r is undef, and one of the
2624 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyaddr_r
2627 getnetbyname_r_proto (d_getnetbyname_r.U):
2628 This variable encodes the prototype of getnetbyname_r.
2629 It is zero if d_getnetbyname_r is undef, and one of the
2630 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyname_r
2633 getnetent_r_proto (d_getnetent_r.U):
2634 This variable encodes the prototype of getnetent_r.
2635 It is zero if d_getnetent_r is undef, and one of the
2636 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetent_r
2639 getprotobyname_r_proto (d_getprotobyname_r.U):
2640 This variable encodes the prototype of getprotobyname_r.
2641 It is zero if d_getprotobyname_r is undef, and one of the
2642 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobyname_r
2645 getprotobynumber_r_proto (d_getprotobynumber_r.U):
2646 This variable encodes the prototype of getprotobynumber_r.
2647 It is zero if d_getprotobynumber_r is undef, and one of the
2648 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobynumber_r
2651 getprotoent_r_proto (d_getprotoent_r.U):
2652 This variable encodes the prototype of getprotoent_r.
2653 It is zero if d_getprotoent_r is undef, and one of the
2654 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotoent_r
2657 getpwent_r_proto (d_getpwent_r.U):
2658 This variable encodes the prototype of getpwent_r.
2659 It is zero if d_getpwent_r is undef, and one of the
2660 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwent_r
2663 getpwnam_r_proto (d_getpwnam_r.U):
2664 This variable encodes the prototype of getpwnam_r.
2665 It is zero if d_getpwnam_r is undef, and one of the
2666 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwnam_r
2669 getpwuid_r_proto (d_getpwuid_r.U):
2670 This variable encodes the prototype of getpwuid_r.
2671 It is zero if d_getpwuid_r is undef, and one of the
2672 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwuid_r
2675 getservbyname_r_proto (d_getservbyname_r.U):
2676 This variable encodes the prototype of getservbyname_r.
2677 It is zero if d_getservbyname_r is undef, and one of the
2678 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyname_r
2681 getservbyport_r_proto (d_getservbyport_r.U):
2682 This variable encodes the prototype of getservbyport_r.
2683 It is zero if d_getservbyport_r is undef, and one of the
2684 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyport_r
2687 getservent_r_proto (d_getservent_r.U):
2688 This variable encodes the prototype of getservent_r.
2689 It is zero if d_getservent_r is undef, and one of the
2690 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservent_r
2693 getspnam_r_proto (d_getspnam_r.U):
2694 This variable encodes the prototype of getspnam_r.
2695 It is zero if d_getspnam_r is undef, and one of the
2696 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getspnam_r
2700 This variable contains the format string used for printing a Gid_t.
2702 gidsign (gidsign.U):
2703 This variable contains the signedness of a gidtype.
2704 1 for unsigned, -1 for signed.
2706 gidsize (gidsize.U):
2707 This variable contains the size of a gidtype in bytes.
2709 gidtype (gidtype.U):
2710 This variable defines Gid_t to be something like gid_t, int,
2711 ushort, or whatever type is used to declare the return type
2712 of getgid(). Typically, it is the type of group ids in the kernel.
2715 This variable holds the general path (space-separated) used to
2716 find libraries. It may contain directories that do not exist on
2717 this platform, libpth is the cleaned-up version.
2720 This variable is used internally by Configure to determine the
2721 full pathname (if any) of the gmake program. After Configure runs,
2722 the value is reset to a plain "gmake" and is not useful.
2724 gmtime_r_proto (d_gmtime_r.U):
2725 This variable encodes the prototype of gmtime_r.
2726 It is zero if d_gmtime_r is undef, and one of the
2727 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gmtime_r
2730 gnulibc_version (d_gnulibc.U):
2731 This variable contains the version number of the GNU C library.
2732 It is usually something like '2.2.5'. It is a plain '' if this
2733 is not the GNU C library, or if the version is unknown.
2736 This variable is used internally by Configure to determine the
2737 full pathname (if any) of the grep program. After Configure runs,
2738 the value is reset to a plain "grep" and is not useful.
2741 This variable contains a command that produces the text of the
2742 /etc/group file. This is normally "cat /etc/group", but can be
2743 "ypcat group" when NIS is used.
2744 On some systems, such as os390, there may be no equivalent
2745 command, in which case this variable is unset.
2747 groupstype (groupstype.U):
2748 This variable defines Groups_t to be something like gid_t, int,
2749 ushort, or whatever type is used for the second argument to
2750 getgroups() and setgroups(). Usually, this is the same as
2751 gidtype (gid_t), but sometimes it isn't.
2754 This variable is used internally by Configure to determine the
2755 full pathname (if any) of the gzip program. After Configure runs,
2756 the value is reset to a plain "gzip" and is not useful.
2758 h_fcntl (h_fcntl.U):
2759 This is variable gets set in various places to tell i_fcntl that
2760 <fcntl.h> should be included.
2762 h_sysfile (h_sysfile.U):
2763 This is variable gets set in various places to tell i_sys_file that
2764 <sys/file.h> should be included.
2767 Gives the type of hints used for previous answers. May be one of
2768 "default", "recommended" or "previous".
2771 This variable contains a command that produces the text of the
2772 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2773 "ypcat hosts" when NIS is used.
2774 On some systems, such as os390, there may be no equivalent
2775 command, in which case this variable is unset.
2777 html1dir (html1dir.U):
2778 This variable contains the name of the directory in which html
2779 source pages are to be put. This directory is for pages
2780 that describe whole programs, not libraries or modules. It
2781 is intended to correspond roughly to section 1 of the Unix
2784 html1direxp (html1dir.U):
2785 This variable is the same as the html1dir variable, but is filename
2786 expanded at configuration time, for convenient use in makefiles.
2788 html3dir (html3dir.U):
2789 This variable contains the name of the directory in which html
2790 source pages are to be put. This directory is for pages
2791 that describe libraries or modules. It is intended to
2792 correspond roughly to section 3 of the Unix manuals.
2794 html3direxp (html3dir.U):
2795 This variable is the same as the html3dir variable, but is filename
2796 expanded at configuration time, for convenient use in makefiles.
2799 This variable is the size of an I16 in bytes.
2802 This variable contains the C type used for Perl's I16.
2805 This variable is the size of an I32 in bytes.
2808 This variable contains the C type used for Perl's I32.
2811 This variable is the size of an I64 in bytes.
2814 This variable contains the C type used for Perl's I64.
2817 This variable is the size of an I8 in bytes.
2820 This variable contains the C type used for Perl's I8.
2822 i_arpainet (i_arpainet.U):
2823 This variable conditionally defines the I_ARPA_INET symbol,
2824 and indicates whether a C program should include <arpa/inet.h>.
2826 i_bsdioctl (i_sysioctl.U):
2827 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2828 indicates to the C program that <sys/bsdioctl.h> exists and should
2831 i_crypt (i_crypt.U):
2832 This variable conditionally defines the I_CRYPT symbol, and indicates
2833 whether a C program should include <crypt.h>.
2836 This variable conditionally defines the I_DB symbol, and indicates
2837 whether a C program may include Berkeley's DB include file <db.h>.
2840 This variable conditionally defines the I_DBM symbol, which
2841 indicates to the C program that <dbm.h> exists and should
2844 i_dirent (i_dirent.U):
2845 This variable conditionally defines I_DIRENT, which indicates
2846 to the C program that it should include <dirent.h>.
2849 This variable conditionally defines the I_DLD symbol, which
2850 indicates to the C program that <dld.h> (GNU dynamic loading)
2851 exists and should be included.
2853 i_dlfcn (i_dlfcn.U):
2854 This variable conditionally defines the I_DLFCN symbol, which
2855 indicates to the C program that <dlfcn.h> exists and should
2858 i_fcntl (i_fcntl.U):
2859 This variable controls the value of I_FCNTL (which tells
2860 the C program to include <fcntl.h>).
2862 i_float (i_float.U):
2863 This variable conditionally defines the I_FLOAT symbol, and indicates
2864 whether a C program may include <float.h> to get symbols like DBL_MAX
2865 or DBL_MIN, i.e. machine dependent floating point values.
2868 This variable conditionally defines the I_FP symbol, and indicates
2869 whether a C program should include <fp.h>.
2871 i_fp_class (i_fp_class.U):
2872 This variable conditionally defines the I_FP_CLASS symbol, and indicates
2873 whether a C program should include <fp_class.h>.
2876 This variable conditionally defines the I_GDBM symbol, which
2877 indicates to the C program that <gdbm.h> exists and should
2881 This variable conditionally defines the I_GRP symbol, and indicates
2882 whether a C program should include <grp.h>.
2884 i_ieeefp (i_ieeefp.U):
2885 This variable conditionally defines the I_IEEEFP symbol, and indicates
2886 whether a C program should include <ieeefp.h>.
2888 i_inttypes (i_inttypes.U):
2889 This variable conditionally defines the I_INTTYPES symbol,
2890 and indicates whether a C program should include <inttypes.h>.
2892 i_langinfo (i_langinfo.U):
2893 This variable conditionally defines the I_LANGINFO symbol,
2894 and indicates whether a C program should include <langinfo.h>.
2896 i_libutil (i_libutil.U):
2897 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2898 whether a C program should include <libutil.h>.
2900 i_limits (i_limits.U):
2901 This variable conditionally defines the I_LIMITS symbol, and indicates
2902 whether a C program may include <limits.h> to get symbols like WORD_BIT
2905 i_locale (i_locale.U):
2906 This variable conditionally defines the I_LOCALE symbol,
2907 and indicates whether a C program should include <locale.h>.
2909 i_machcthr (i_machcthr.U):
2910 This variable conditionally defines the I_MACH_CTHREADS symbol,
2911 and indicates whether a C program should include <mach/cthreads.h>.
2913 i_malloc (i_malloc.U):
2914 This variable conditionally defines the I_MALLOC symbol, and indicates
2915 whether a C program should include <malloc.h>.
2918 This variable conditionally defines the I_MATH symbol, and indicates
2919 whether a C program may include <math.h>.
2921 i_memory (i_memory.U):
2922 This variable conditionally defines the I_MEMORY symbol, and indicates
2923 whether a C program should include <memory.h>.
2925 i_mntent (i_mntent.U):
2926 This variable conditionally defines the I_MNTENT symbol, and indicates
2927 whether a C program should include <mntent.h>.
2930 This variable conditionally defines the I_NDBM symbol, which
2931 indicates to the C program that <ndbm.h> exists and should
2934 i_netdb (i_netdb.U):
2935 This variable conditionally defines the I_NETDB symbol, and indicates
2936 whether a C program should include <netdb.h>.
2938 i_neterrno (i_neterrno.U):
2939 This variable conditionally defines the I_NET_ERRNO symbol, which
2940 indicates to the C program that <net/errno.h> exists and should
2943 i_netinettcp (i_netinettcp.U):
2944 This variable conditionally defines the I_NETINET_TCP symbol,
2945 and indicates whether a C program should include <netinet/tcp.h>.
2948 This variable conditionally defines I_NETINET_IN, which indicates
2949 to the C program that it should include <netinet/in.h>. Otherwise,
2950 you may try <sys/in.h>.
2953 This variable conditionally defines the I_POLL symbol, and indicates
2954 whether a C program should include <poll.h>.
2957 This variable conditionally defines the I_PROT symbol, and indicates
2958 whether a C program should include <prot.h>.
2960 i_pthread (i_pthread.U):
2961 This variable conditionally defines the I_PTHREAD symbol,
2962 and indicates whether a C program should include <pthread.h>.
2965 This variable conditionally defines I_PWD, which indicates
2966 to the C program that it should include <pwd.h>.
2968 i_rpcsvcdbm (i_dbm.U):
2969 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2970 indicates to the C program that <rpcsvc/dbm.h> exists and should
2971 be included. Some System V systems might need this instead of <dbm.h>.
2974 This variable conditionally defines the I_SFIO symbol,
2975 and indicates whether a C program should include <sfio.h>.
2977 i_sgtty (i_termio.U):
2978 This variable conditionally defines the I_SGTTY symbol, which
2979 indicates to the C program that it should include <sgtty.h> rather
2982 i_shadow (i_shadow.U):
2983 This variable conditionally defines the I_SHADOW symbol, and indicates
2984 whether a C program should include <shadow.h>.
2986 i_socks (i_socks.U):
2987 This variable conditionally defines the I_SOCKS symbol, and indicates
2988 whether a C program should include <socks.h>.
2990 i_stdarg (i_varhdr.U):
2991 This variable conditionally defines the I_STDARG symbol, which
2992 indicates to the C program that <stdarg.h> exists and should
2995 i_stddef (i_stddef.U):
2996 This variable conditionally defines the I_STDDEF symbol, which
2997 indicates to the C program that <stddef.h> exists and should
3000 i_stdlib (i_stdlib.U):
3001 This variable conditionally defines the I_STDLIB symbol, which
3002 indicates to the C program that <stdlib.h> exists and should
3005 i_string (i_string.U):
3006 This variable conditionally defines the I_STRING symbol, which
3007 indicates that <string.h> should be included rather than <strings.h>.
3009 i_sunmath (i_sunmath.U):
3010 This variable conditionally defines the I_SUNMATH symbol, and indicates
3011 whether a C program should include <sunmath.h>.
3013 i_sysaccess (i_sysaccess.U):
3014 This variable conditionally defines the I_SYS_ACCESS symbol,
3015 and indicates whether a C program should include <sys/access.h>.
3017 i_sysdir (i_sysdir.U):
3018 This variable conditionally defines the I_SYS_DIR symbol, and indicates
3019 whether a C program should include <sys/dir.h>.
3021 i_sysfile (i_sysfile.U):
3022 This variable conditionally defines the I_SYS_FILE symbol, and indicates
3023 whether a C program should include <sys/file.h> to get R_OK and friends.
3025 i_sysfilio (i_sysioctl.U):
3026 This variable conditionally defines the I_SYS_FILIO symbol, which
3027 indicates to the C program that <sys/filio.h> exists and should
3028 be included in preference to <sys/ioctl.h>.
3031 This variable conditionally defines I_SYS_IN, which indicates
3032 to the C program that it should include <sys/in.h> instead of
3035 i_sysioctl (i_sysioctl.U):
3036 This variable conditionally defines the I_SYS_IOCTL symbol, which
3037 indicates to the C program that <sys/ioctl.h> exists and should
3040 i_syslog (i_syslog.U):
3041 This variable conditionally defines the I_SYSLOG symbol,
3042 and indicates whether a C program should include <syslog.h>.
3044 i_sysmman (i_sysmman.U):
3045 This variable conditionally defines the I_SYS_MMAN symbol, and
3046 indicates whether a C program should include <sys/mman.h>.
3048 i_sysmode (i_sysmode.U):
3049 This variable conditionally defines the I_SYSMODE symbol,
3050 and indicates whether a C program should include <sys/mode.h>.
3052 i_sysmount (i_sysmount.U):
3053 This variable conditionally defines the I_SYSMOUNT symbol,
3054 and indicates whether a C program should include <sys/mount.h>.
3056 i_sysndir (i_sysndir.U):
3057 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
3058 whether a C program should include <sys/ndir.h>.
3060 i_sysparam (i_sysparam.U):
3061 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
3062 whether a C program should include <sys/param.h>.
3064 i_sysresrc (i_sysresrc.U):
3065 This variable conditionally defines the I_SYS_RESOURCE symbol,
3066 and indicates whether a C program should include <sys/resource.h>.
3068 i_syssecrt (i_syssecrt.U):
3069 This variable conditionally defines the I_SYS_SECURITY symbol,
3070 and indicates whether a C program should include <sys/security.h>.
3072 i_sysselct (i_sysselct.U):
3073 This variable conditionally defines I_SYS_SELECT, which indicates
3074 to the C program that it should include <sys/select.h> in order to
3075 get the definition of struct timeval.
3077 i_syssockio (i_sysioctl.U):
3078 This variable conditionally defines I_SYS_SOCKIO to indicate to the
3079 C program that socket ioctl codes may be found in <sys/sockio.h>
3080 instead of <sys/ioctl.h>.
3082 i_sysstat (i_sysstat.U):
3083 This variable conditionally defines the I_SYS_STAT symbol,
3084 and indicates whether a C program should include <sys/stat.h>.
3086 i_sysstatfs (i_sysstatfs.U):
3087 This variable conditionally defines the I_SYSSTATFS symbol,
3088 and indicates whether a C program should include <sys/statfs.h>.
3090 i_sysstatvfs (i_sysstatvfs.U):
3091 This variable conditionally defines the I_SYSSTATVFS symbol,
3092 and indicates whether a C program should include <sys/statvfs.h>.
3094 i_systime (i_time.U):
3095 This variable conditionally defines I_SYS_TIME, which indicates
3096 to the C program that it should include <sys/time.h>.
3098 i_systimek (i_time.U):
3099 This variable conditionally defines I_SYS_TIME_KERNEL, which
3100 indicates to the C program that it should include <sys/time.h>
3101 with KERNEL defined.
3103 i_systimes (i_systimes.U):
3104 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
3105 whether a C program should include <sys/times.h>.
3107 i_systypes (i_systypes.U):
3108 This variable conditionally defines the I_SYS_TYPES symbol,
3109 and indicates whether a C program should include <sys/types.h>.
3111 i_sysuio (i_sysuio.U):
3112 This variable conditionally defines the I_SYSUIO symbol, and indicates
3113 whether a C program should include <sys/uio.h>.
3115 i_sysun (i_sysun.U):
3116 This variable conditionally defines I_SYS_UN, which indicates
3117 to the C program that it should include <sys/un.h> to get UNIX
3118 domain socket definitions.
3120 i_sysutsname (i_sysutsname.U):
3121 This variable conditionally defines the I_SYSUTSNAME symbol,
3122 and indicates whether a C program should include <sys/utsname.h>.
3124 i_sysvfs (i_sysvfs.U):
3125 This variable conditionally defines the I_SYSVFS symbol,
3126 and indicates whether a C program should include <sys/vfs.h>.
3128 i_syswait (i_syswait.U):
3129 This variable conditionally defines I_SYS_WAIT, which indicates
3130 to the C program that it should include <sys/wait.h>.
3132 i_termio (i_termio.U):
3133 This variable conditionally defines the I_TERMIO symbol, which
3134 indicates to the C program that it should include <termio.h> rather
3137 i_termios (i_termio.U):
3138 This variable conditionally defines the I_TERMIOS symbol, which
3139 indicates to the C program that the POSIX <termios.h> file is
3143 This variable conditionally defines I_TIME, which indicates
3144 to the C program that it should include <time.h>.
3146 i_unistd (i_unistd.U):
3147 This variable conditionally defines the I_UNISTD symbol, and indicates
3148 whether a C program should include <unistd.h>.
3150 i_ustat (i_ustat.U):
3151 This variable conditionally defines the I_USTAT symbol, and indicates
3152 whether a C program should include <ustat.h>.
3154 i_utime (i_utime.U):
3155 This variable conditionally defines the I_UTIME symbol, and indicates
3156 whether a C program should include <utime.h>.
3158 i_values (i_values.U):
3159 This variable conditionally defines the I_VALUES symbol, and indicates
3160 whether a C program may include <values.h> to get symbols like MAXLONG
3163 i_varargs (i_varhdr.U):
3164 This variable conditionally defines I_VARARGS, which indicates
3165 to the C program that it should include <varargs.h>.
3167 i_varhdr (i_varhdr.U):
3168 Contains the name of the header to be included to get va_dcl definition.
3169 Typically one of varargs.h or stdarg.h.
3171 i_vfork (i_vfork.U):
3172 This variable conditionally defines the I_VFORK symbol, and indicates
3173 whether a C program should include vfork.h.
3175 ignore_versioned_solibs (libs.U):
3176 This variable should be non-empty if non-versioned shared
3177 libraries (libfoo.so.x.y) are to be ignored (because they
3178 cannot be linked against).
3180 inc_version_list (inc_version_list.U):
3181 This variable specifies the list of subdirectories in over
3182 which perl.c:incpush() and lib/lib.pm will automatically
3183 search when adding directories to @INC. The elements in
3184 the list are separated by spaces. This is only useful
3185 if you have a perl library directory tree structured like the
3186 default one. See INSTALL for how this works. The versioned
3187 site_perl directory was introduced in 5.005, so that is the
3188 lowest possible value.
3190 This list includes architecture-dependent directories back to
3191 version $api_versionstring (e.g. 5.5.640) and
3192 architecture-independent directories all the way back to
3195 inc_version_list_init (inc_version_list.U):
3196 This variable holds the same list as inc_version_list, but
3197 each item is enclosed in double quotes and separated by commas,
3198 suitable for use in the PERL_INC_VERSION_LIST initialization.
3201 This variable must preceed the normal include path to get hte
3202 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
3203 Value can be "" or "/bsd43" on mips.
3206 This variable is defined but not used by Configure.
3207 The value is a plain '' and is not useful.
3209 initialinstalllocation (bin.U):
3210 When userelocatableinc is true, this variable holds the location
3211 that make install should copy the perl binary to, with all the
3212 run-time relocatable paths calculated from this at install time.
3213 When used, it is initialised to the original value of binexp, and
3214 then binexp is set to '.../', as the other binaries are found
3215 relative to the perl binary.
3217 installarchlib (archlib.U):
3218 This variable is really the same as archlibexp but may differ on
3219 those systems using AFS. For extra portability, only this variable
3220 should be used in makefiles.
3223 This variable is the same as binexp unless AFS is running in which case
3224 the user is explicitely prompted for it. This variable should always
3225 be used in your makefiles for maximum portability.
3227 installhtml1dir (html1dir.U):
3228 This variable is really the same as html1direxp, unless you are
3229 using a different installprefix. For extra portability, you
3230 should only use this variable within your makefiles.
3232 installhtml3dir (html3dir.U):
3233 This variable is really the same as html3direxp, unless you are
3234 using a different installprefix. For extra portability, you
3235 should only use this variable within your makefiles.
3237 installman1dir (man1dir.U):
3238 This variable is really the same as man1direxp, unless you are using
3239 AFS in which case it points to the read/write location whereas
3240 man1direxp only points to the read-only access location. For extra
3241 portability, you should only use this variable within your makefiles.
3243 installman3dir (man3dir.U):
3244 This variable is really the same as man3direxp, unless you are using
3245 AFS in which case it points to the read/write location whereas
3246 man3direxp only points to the read-only access location. For extra
3247 portability, you should only use this variable within your makefiles.
3249 installprefix (installprefix.U):
3250 This variable holds the name of the directory below which
3251 "make install" will install the package. For most users, this
3252 is the same as prefix. However, it is useful for
3253 installing the software into a different (usually temporary)
3254 location after which it can be bundled up and moved somehow
3255 to the final location specified by prefix.
3257 installprefixexp (installprefix.U):
3258 This variable holds the full absolute path of installprefix
3259 with all ~-expansion done.
3261 installprivlib (privlib.U):
3262 This variable is really the same as privlibexp but may differ on
3263 those systems using AFS. For extra portability, only this variable
3264 should be used in makefiles.
3266 installscript (scriptdir.U):
3267 This variable is usually the same as scriptdirexp, unless you are on
3268 a system running AFS, in which case they may differ slightly. You
3269 should always use this variable within your makefiles for portability.
3271 installsitearch (sitearch.U):
3272 This variable is really the same as sitearchexp but may differ on
3273 those systems using AFS. For extra portability, only this variable
3274 should be used in makefiles.
3276 installsitebin (sitebin.U):
3277 This variable is usually the same as sitebinexp, unless you are on
3278 a system running AFS, in which case they may differ slightly. You
3279 should always use this variable within your makefiles for portability.
3281 installsitehtml1dir (sitehtml1dir.U):
3282 This variable is really the same as sitehtml1direxp, unless you are using
3283 AFS in which case it points to the read/write location whereas
3284 html1direxp only points to the read-only access location. For extra
3285 portability, you should only use this variable within your makefiles.
3287 installsitehtml3dir (sitehtml3dir.U):
3288 This variable is really the same as sitehtml3direxp, unless you are using
3289 AFS in which case it points to the read/write location whereas
3290 html3direxp only points to the read-only access location. For extra
3291 portability, you should only use this variable within your makefiles.
3293 installsitelib (sitelib.U):
3294 This variable is really the same as sitelibexp but may differ on
3295 those systems using AFS. For extra portability, only this variable
3296 should be used in makefiles.
3298 installsiteman1dir (siteman1dir.U):
3299 This variable is really the same as siteman1direxp, unless you are using
3300 AFS in which case it points to the read/write location whereas
3301 man1direxp only points to the read-only access location. For extra
3302 portability, you should only use this variable within your makefiles.
3304 installsiteman3dir (siteman3dir.U):
3305 This variable is really the same as siteman3direxp, unless you are using
3306 AFS in which case it points to the read/write location whereas
3307 man3direxp only points to the read-only access location. For extra
3308 portability, you should only use this variable within your makefiles.
3310 installsitescript (sitescript.U):
3311 This variable is usually the same as sitescriptexp, unless you are on
3312 a system running AFS, in which case they may differ slightly. You
3313 should always use this variable within your makefiles for portability.
3315 installstyle (installstyle.U):
3316 This variable describes the "style" of the perl installation.
3317 This is intended to be useful for tools that need to
3318 manipulate entire perl distributions. Perl itself doesn't use
3319 this to find its libraries -- the library directories are
3320 stored directly in Config.pm. Currently, there are only two
3321 styles: "lib" and "lib/perl5". The default library locations
3322 (e.g. privlib, sitelib) are either $prefix/lib or
3323 $prefix/lib/perl5. The former is useful if $prefix is a
3324 directory dedicated to perl (e.g. /opt/perl), while the latter
3325 is useful if $prefix is shared by many packages, e.g. if
3328 Unfortunately, while this "style" variable is used to set
3329 defaults for all three directory hierarchies (core, vendor, and
3330 site), there is no guarantee that the same style is actually
3331 appropriate for all those directories. For example, $prefix
3332 might be /opt/perl, but $siteprefix might be /usr/local.
3333 (Perhaps, in retrospect, the "lib" style should never have been
3334 supported, but it did seem like a nice idea at the time.)
3336 The situation is even less clear for tools such as MakeMaker
3337 that can be used to install additional modules into
3338 non-standard places. For example, if a user intends to install
3339 a module into a private directory (perhaps by setting PREFIX on
3340 the Makefile.PL command line), then there is no reason to
3341 assume that the Configure-time $installstyle setting will be
3342 relevant for that PREFIX.
3344 This may later be extended to include other information, so
3345 be careful with pattern-matching on the results.
3347 For compatibility with perl5.005 and earlier, the default
3348 setting is based on whether or not $prefix contains the string
3351 installusrbinperl (instubperl.U):
3352 This variable tells whether Perl should be installed also as
3353 /usr/bin/perl in addition to
3356 installvendorarch (vendorarch.U):
3357 This variable is really the same as vendorarchexp but may differ on
3358 those systems using AFS. For extra portability, only this variable
3359 should be used in makefiles.
3361 installvendorbin (vendorbin.U):
3362 This variable is really the same as vendorbinexp but may differ on
3363 those systems using AFS. For extra portability, only this variable
3364 should be used in makefiles.
3366 installvendorhtml1dir (vendorhtml1dir.U):
3367 This variable is really the same as vendorhtml1direxp but may differ on
3368 those systems using AFS. For extra portability, only this variable
3369 should be used in makefiles.
3371 installvendorhtml3dir (vendorhtml3dir.U):
3372 This variable is really the same as vendorhtml3direxp but may differ on
3373 those systems using AFS. For extra portability, only this variable
3374 should be used in makefiles.
3376 installvendorlib (vendorlib.U):
3377 This variable is really the same as vendorlibexp but may differ on
3378 those systems using AFS. For extra portability, only this variable
3379 should be used in makefiles.
3381 installvendorman1dir (vendorman1dir.U):
3382 This variable is really the same as vendorman1direxp but may differ on
3383 those systems using AFS. For extra portability, only this variable
3384 should be used in makefiles.
3386 installvendorman3dir (vendorman3dir.U):
3387 This variable is really the same as vendorman3direxp but may differ on
3388 those systems using AFS. For extra portability, only this variable
3389 should be used in makefiles.
3391 installvendorscript (vendorscript.U):
3392 This variable is really the same as vendorscriptexp but may differ on
3393 those systems using AFS. For extra portability, only this variable
3394 should be used in makefiles.
3396 intsize (intsize.U):
3397 This variable contains the value of the INTSIZE symbol, which
3398 indicates to the C program how many bytes there are in an int.
3400 issymlink (issymlink.U):
3401 This variable holds the test command to test for a symbolic link
3402 (if they are supported). Typical values include 'test -h' and
3405 ivdformat (perlxvf.U):
3406 This variable contains the format string used for printing
3407 a Perl IV as a signed decimal integer.
3410 This variable is the size of an IV in bytes.
3413 This variable contains the C type used for Perl's IV.
3415 known_extensions (Extensions.U):
3416 This variable holds a list of all XS extensions included in
3420 This variable is defined but not used by Configure.
3421 The value is a plain '' and is not useful.
3424 This variable indicates the program to be used to link
3425 libraries for dynamic loading. On some systems, it is 'ld'.
3426 On ELF systems, it should be $cc. Mostly, we'll try to respect
3427 the hint file setting.
3429 lddlflags (dlsrc.U):
3430 This variable contains any special flags that might need to be
3431 passed to $ld to create a shared library suitable for dynamic
3432 loading. It is up to the makefile to use it. For hpux, it
3433 should be '-b'. For sunos 4.1, it is empty.
3435 ldflags (ccflags.U):
3436 This variable contains any additional C loader flags desired by
3437 the user. It is up to the Makefile to use this.
3439 ldflags_uselargefiles (uselfs.U):
3440 This variable contains the loader flags needed by large file builds
3441 and added to ldflags by hints files.
3443 ldlibpthname (libperl.U):
3444 This variable holds the name of the shared library
3445 search path, often LD_LIBRARY_PATH. To get an empty
3446 string, the hints file must set this to 'none'.
3449 This variable is used internally by Configure to determine the
3450 full pathname (if any) of the less program. After Configure runs,
3451 the value is reset to a plain "less" and is not useful.
3454 This is an old synonym for _a.
3457 This variable contains the location of the C library.
3459 libperl (libperl.U):
3460 The perl executable is obtained by linking perlmain.c with
3461 libperl, any static extensions (usually just DynaLoader),
3462 and any other libraries needed on this system. libperl
3463 is usually libperl.a, but can also be libperl.so.xxx if
3464 the user wishes to build a perl executable with a shared
3468 This variable holds the general path (space-separated) used to find
3469 libraries. It is intended to be used by other units.
3472 This variable holds the additional libraries we want to use.
3473 It is up to the Makefile to deal with it. The list can be empty.
3476 This variable holds the directory names aka dirnames of the libraries
3477 we found and accepted, duplicates are removed.
3480 This variable holds the filenames aka basenames of the libraries
3481 we found and accepted.
3484 This variable holds the full pathnames of the libraries
3485 we found and accepted.
3488 This variable holds the directory names probed for libraries.
3490 libswanted (Myinit.U):
3491 This variable holds a list of all the libraries we want to
3492 search. The order is chosen to pick up the c library
3493 ahead of ucb or bsd libraries for SVR4.
3495 libswanted_uselargefiles (uselfs.U):
3496 This variable contains the libraries needed by large file builds
3497 and added to ldflags by hints files. It is a space separated list
3498 of the library names without the "lib" prefix or any suffix, just
3502 This variable is defined but not used by Configure.
3503 The value is a plain '' and is not useful.
3506 This variable is defined but not used by Configure.
3507 The value is a plain '' and is not useful.
3509 lkflags (ccflags.U):
3510 This variable contains any additional C partial linker flags desired by
3511 the user. It is up to the Makefile to use this.
3514 This variable is used internally by Configure to determine the
3515 full pathname (if any) of the ln program. After Configure runs,
3516 the value is reset to a plain "ln" and is not useful.
3519 This variable holds the name of the command to make
3520 symbolic links (if they are supported). It can be used
3521 in the Makefile. It is either 'ln -s' or 'ln'
3523 localtime_r_proto (d_localtime_r.U):
3524 This variable encodes the prototype of localtime_r.
3525 It is zero if d_localtime_r is undef, and one of the
3526 REENTRANT_PROTO_T_ABC macros of reentr.h if d_localtime_r
3529 locincpth (ccflags.U):
3530 This variable contains a list of additional directories to be
3531 searched by the compiler. The appropriate '-I' directives will
3532 be added to ccflags. This is intended to simplify setting
3533 local directories from the Configure command line.
3534 It's not much, but it parallels the loclibpth stuff in libpth.U.
3536 loclibpth (libpth.U):
3537 This variable holds the paths (space-separated) used to find local
3538 libraries. It is prepended to libpth, and is intended to be easily
3539 set from the command line.
3541 longdblsize (d_longdbl.U):
3542 This variable contains the value of the LONG_DOUBLESIZE symbol, which
3543 indicates to the C program how many bytes there are in a long double,
3544 if this system supports long doubles.
3546 longlongsize (d_longlong.U):
3547 This variable contains the value of the LONGLONGSIZE symbol, which
3548 indicates to the C program how many bytes there are in a long long,
3549 if this system supports long long.
3551 longsize (intsize.U):
3552 This variable contains the value of the LONGSIZE symbol, which
3553 indicates to the C program how many bytes there are in a long.
3556 This variable is defined but not used by Configure.
3557 The value is a plain '' and is not useful.
3560 This variable is defined but not used by Configure.
3561 The value is a plain '' and is not useful.
3564 This variable is used internally by Configure to determine the
3565 full pathname (if any) of the ls program. After Configure runs,
3566 the value is reset to a plain "ls" and is not useful.
3568 lseeksize (lseektype.U):
3569 This variable defines lseektype to be something like off_t, long,
3570 or whatever type is used to declare lseek offset's type in the
3571 kernel (which also appears to be lseek's return type).
3573 lseektype (lseektype.U):
3574 This variable defines lseektype to be something like off_t, long,
3575 or whatever type is used to declare lseek offset's type in the
3576 kernel (which also appears to be lseek's return type).
3579 This variable indicates that the Misc Attribute Definition code is to
3583 If the Misc Attribute Decoration is to be compiled, this variable is
3584 set to the name of the extra header files to be used, else it is ''
3587 If the Misc Attribute Decoration is to be compiled, this variable is
3588 set to the name of the extra object files to be used, else it is ''
3591 If the Misc Attribute Decoration is to be compiled, this variable is
3592 set to the name of the extra C source files to be used, else it is ''
3595 This variable is defined but not used by Configure.
3596 The value is a plain '' and is not useful.
3599 This variable is defined but not used by Configure.
3600 The value is a plain '' and is not useful.
3603 This variable is used internally by Configure to determine the
3604 full pathname (if any) of the make program. After Configure runs,
3605 the value is reset to a plain "make" and is not useful.
3607 make_set_make (make.U):
3608 Some versions of 'make' set the variable MAKE. Others do not.
3609 This variable contains the string to be included in Makefile.SH
3610 so that MAKE is set if needed, and not if not needed.
3611 Possible values are:
3613 make_set_make='#' # If your make program handles this for you,
3615 make_set_make="MAKE=$make" # if it doesn't.
3617 This uses a comment character to distinguish a
3618 'set' value (from a previous config.sh or Configure '-D' option)
3619 from an uncomputed value.
3621 mallocobj (mallocsrc.U):
3622 This variable contains the name of the malloc.o that this package
3623 generates, if that malloc.o is preferred over the system malloc.
3624 Otherwise the value is null. This variable is intended for generating
3625 Makefiles. See mallocsrc.
3627 mallocsrc (mallocsrc.U):
3628 This variable contains the name of the malloc.c that comes with
3629 the package, if that malloc.c is preferred over the system malloc.
3630 Otherwise the value is null. This variable is intended for generating
3633 malloctype (mallocsrc.U):
3634 This variable contains the kind of ptr returned by malloc and realloc.
3636 man1dir (man1dir.U):
3637 This variable contains the name of the directory in which manual
3638 source pages are to be put. It is the responsibility of the
3639 Makefile.SH to get the value of this into the proper command.
3640 You must be prepared to do the ~name expansion yourself.
3642 man1direxp (man1dir.U):
3643 This variable is the same as the man1dir variable, but is filename
3644 expanded at configuration time, for convenient use in makefiles.
3646 man1ext (man1dir.U):
3647 This variable contains the extension that the manual page should
3648 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
3651 man3dir (man3dir.U):
3652 This variable contains the name of the directory in which manual
3653 source pages are to be put. It is the responsibility of the
3654 Makefile.SH to get the value of this into the proper command.
3655 You must be prepared to do the ~name expansion yourself.
3657 man3direxp (man3dir.U):
3658 This variable is the same as the man3dir variable, but is filename
3659 expanded at configuration time, for convenient use in makefiles.
3661 man3ext (man3dir.U):
3662 This variable contains the extension that the manual page should
3663 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
3667 This variable is used internally by Configure to determine the
3668 full pathname (if any) of the Mcc program. After Configure runs,
3669 the value is reset to a plain "Mcc" and is not useful.
3671 mips_type (usrinc.U):
3672 This variable holds the environment type for the mips system.
3673 Possible values are "BSD 4.3" and "System V".
3675 mistrustnm (Csym.U):
3676 This variable can be used to establish a fallthrough for the cases
3677 where nm fails to find a symbol. If usenm is false or usenm is true
3678 and mistrustnm is false, this variable has no effect. If usenm is true
3679 and mistrustnm is "compile", a test program will be compiled to try to
3680 find any symbol that can't be located via nm lookup. If mistrustnm is
3681 "run", the test program will be run as well as being compiled.
3684 This variable is used internally by Configure to determine the
3685 full pathname (if any) of the mkdir program. After Configure runs,
3686 the value is reset to a plain "mkdir" and is not useful.
3688 mmaptype (d_mmap.U):
3689 This symbol contains the type of pointer returned by mmap()
3690 (and simultaneously the type of the first argument).
3691 It can be 'void *' or 'caddr_t'.
3693 modetype (modetype.U):
3694 This variable defines modetype to be something like mode_t,
3695 int, unsigned short, or whatever type is used to declare file
3696 modes for system calls.
3699 This variable is used internally by Configure to determine the
3700 full pathname (if any) of the more program. After Configure runs,
3701 the value is reset to a plain "more" and is not useful.
3703 multiarch (multiarch.U):
3704 This variable conditionally defines the MULTIARCH symbol
3705 which signifies the presence of multiplatform files.
3706 This is normally set by hints files.
3709 This variable is defined but not used by Configure.
3710 The value is a plain '' and is not useful.
3712 myarchname (archname.U):
3713 This variable holds the architecture name computed by Configure in
3714 a previous run. It is not intended to be perused by any user and
3715 should never be set in a hint file.
3717 mydomain (myhostname.U):
3718 This variable contains the eventual value of the MYDOMAIN symbol,
3719 which is the domain of the host the program is going to run on.
3720 The domain must be appended to myhostname to form a complete host name.
3721 The dot comes with mydomain, and need not be supplied by the program.
3723 myhostname (myhostname.U):
3724 This variable contains the eventual value of the MYHOSTNAME symbol,
3725 which is the name of the host the program is going to run on.
3726 The domain is not kept with hostname, but must be gotten from mydomain.
3727 The dot comes with mydomain, and need not be supplied by the program.
3729 myuname (Oldconfig.U):
3730 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
3731 pseudo variables assignments in the output are stripped, thank you. The
3732 whole thing is then lower-cased.
3735 This variable contains the '-n' flag if that is what causes the echo
3736 command to suppress newline. Otherwise it is null. Correct usage is
3737 $echo $n "prompt for a question: $c".
3739 need_va_copy (need_va_copy.U):
3740 This symbol, if defined, indicates that the system stores
3741 the variable argument list datatype, va_list, in a format
3742 that cannot be copied by simple assignment, so that some
3743 other means must be used when copying is required.
3744 As such systems vary in their provision (or non-provision)
3745 of copying mechanisms, handy.h defines a platform-
3746 independent macro, Perl_va_copy(src, dst), to do the job.
3748 netdb_hlen_type (netdbtype.U):
3749 This variable holds the type used for the 2nd argument to
3750 gethostbyaddr(). Usually, this is int or size_t or unsigned.
3751 This is only useful if you have gethostbyaddr(), naturally.
3753 netdb_host_type (netdbtype.U):
3754 This variable holds the type used for the 1st argument to
3755 gethostbyaddr(). Usually, this is char * or void *, possibly
3756 with or without a const prefix.
3757 This is only useful if you have gethostbyaddr(), naturally.
3759 netdb_name_type (netdbtype.U):
3760 This variable holds the type used for the argument to
3761 gethostbyname(). Usually, this is char * or const char *.
3762 This is only useful if you have gethostbyname(), naturally.
3764 netdb_net_type (netdbtype.U):
3765 This variable holds the type used for the 1st argument to
3766 getnetbyaddr(). Usually, this is int or long.
3767 This is only useful if you have getnetbyaddr(), naturally.
3770 This variable is used internally by Configure to determine the
3771 full pathname (if any) of the nm program. After Configure runs,
3772 the value is reset to a plain "nm" and is not useful.
3775 This variable holds the options that may be necessary for nm.
3777 nm_so_opt (usenm.U):
3778 This variable holds the options that may be necessary for nm
3779 to work on a shared library but that can not be used on an
3780 archive library. Currently, this is only used by Linux, where
3781 nm --dynamic is *required* to get symbols from an ELF library which
3782 has been stripped, but nm --dynamic is *fatal* on an archive library.
3783 Maybe Linux should just always set usenm=false.
3785 nonxs_ext (Extensions.U):
3786 This variable holds a list of all non-xs extensions included
3787 in the package. All of them will be built.
3790 This variable is used internally by Configure to determine the
3791 full pathname (if any) of the nroff program. After Configure runs,
3792 the value is reset to a plain "nroff" and is not useful.
3794 nv_preserves_uv_bits (perlxv.U):
3795 This variable indicates how many of bits type uvtype
3796 a variable nvtype can preserve.
3798 nveformat (perlxvf.U):
3799 This variable contains the format string used for printing
3800 a Perl NV using %e-ish floating point format.
3802 nvEUformat (perlxvf.U):
3803 This variable contains the format string used for printing
3804 a Perl NV using %E-ish floating point format.
3806 nvfformat (perlxvf.U):
3807 This variable confains the format string used for printing
3808 a Perl NV using %f-ish floating point format.
3810 nvFUformat (perlxvf.U):
3811 This variable confains the format string used for printing
3812 a Perl NV using %F-ish floating point format.
3814 nvgformat (perlxvf.U):
3815 This variable contains the format string used for printing
3816 a Perl NV using %g-ish floating point format.
3818 nvGUformat (perlxvf.U):
3819 This variable contains the format string used for printing
3820 a Perl NV using %G-ish floating point format.
3823 This variable is the size of an NV in bytes.
3826 This variable contains the C type used for Perl's NV.
3828 o_nonblock (nblock_io.U):
3829 This variable bears the symbol value to be used during open() or fcntl()
3830 to turn on non-blocking I/O for a file descriptor. If you wish to switch
3831 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
3832 but that is only supported by some devices.
3835 This is an old synonym for _o.
3837 old_pthread_create_joinable (d_pthrattrj.U):
3838 This variable defines the constant to use for creating joinable
3839 (aka undetached) pthreads. Unused if pthread.h defines
3840 PTHREAD_CREATE_JOINABLE. If used, possible values are
3841 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
3843 optimize (ccflags.U):
3844 This variable contains any optimizer/debugger flag that should be used.
3845 It is up to the Makefile to use it.
3847 orderlib (orderlib.U):
3848 This variable is "true" if the components of libraries must be ordered
3849 (with `lorder $* | tsort`) before placing them in an archive. Set to
3850 "false" if ranlib or ar can generate random libraries.
3852 osname (Oldconfig.U):
3853 This variable contains the operating system name (e.g. sunos,
3854 solaris, hpux, etc.). It can be useful later on for setting
3855 defaults. Any spaces are replaced with underscores. It is set
3856 to a null string if we can't figure it out.
3858 osvers (Oldconfig.U):
3859 This variable contains the operating system version (e.g.
3860 4.1.3, 5.2, etc.). It is primarily used for helping select
3861 an appropriate hints file, but might be useful elsewhere for
3862 setting defaults. It is set to '' if we can't figure it out.
3863 We try to be flexible about how much of the version number
3864 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3865 same for this package, hints files might just be os_4.0 or
3866 os_4.1, etc., not keeping separate files for each little release.
3868 otherlibdirs (otherlibdirs.U):
3869 This variable contains a colon-separated set of paths for the perl
3870 binary to search for additional library files or modules.
3871 These directories will be tacked to the end of @INC.
3872 Perl will automatically search below each path for version-
3873 and architecture-specific directories. See inc_version_list
3875 A value of ' ' means 'none' and is used to preserve this value
3876 for the next run through Configure.
3878 package (package.U):
3879 This variable contains the name of the package being constructed.
3880 It is primarily intended for the use of later Configure units.
3883 This variable contains the name of the preferred pager on the system.
3884 Usual values are (the full pathnames of) more, less, pg, or cat.
3887 This variable contains a command that produces the text of the
3888 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3889 "ypcat passwd" when NIS is used.
3890 On some systems, such as os390, there may be no equivalent
3891 command, in which case this variable is unset.
3893 patchlevel (patchlevel.U):
3894 The patchlevel level of this package.
3895 The value of patchlevel comes from the patchlevel.h file.
3896 In a version number such as 5.6.1, this is the "6".
3897 In patchlevel.h, this is referred to as "PERL_VERSION".
3900 This is an old synonym for p_ in Head.U, the character
3901 used to separate elements in the command shell search PATH.
3904 This variable is defined but not used by Configure.
3905 The value is a plain '' and is not useful.
3908 This variable contains the full path (if any) to a previously
3909 installed perl5.005 or later suitable for running the script
3910 to determine inc_version_list.
3912 PERL_API_REVISION (patchlevel.h):
3913 This number describes the earliest compatible PERL_REVISION of
3914 Perl ("compatibility" here being defined as sufficient binary/API
3915 compatibility to run XS code built with the older version).
3916 Normally this does not change across maintenance releases.
3917 Please read the comment in patchlevel.h.
3919 PERL_API_SUBVERSION (patchlevel.h):
3920 This number describes the earliest compatible PERL_SUBVERSION of
3921 Perl ("compatibility" here being defined as sufficient binary/API
3922 compatibility to run XS code built with the older version).
3923 Normally this does not change across maintenance releases.
3924 Please read the comment in patchlevel.h.
3926 PERL_API_VERSION (patchlevel.h):
3927 This number describes the earliest compatible PERL_VERSION of
3928 Perl ("compatibility" here being defined as sufficient binary/API
3929 compatibility to run XS code built with the older version).
3930 Normally this does not change across maintenance releases.
3931 Please read the comment in patchlevel.h.
3933 PERL_CONFIG_SH (Oldsyms.U):
3934 This is set to 'true' in config.sh so that a shell script
3935 sourcing config.sh can tell if it has been sourced already.
3937 PERL_PATCHLEVEL (Oldsyms.U):
3938 This symbol reflects the patchlevel, if available. Will usually
3939 come from the .patch file, which is available when the perl
3940 source tree was fetched with rsync.
3942 perl_patchlevel (patchlevel.U):
3943 This is the Perl patch level, a numeric change identifier,
3944 as defined by whichever source code maintenance system
3945 is used to maintain the patches; currently Perforce.
3946 It does not correlate with the Perl version numbers or
3947 the maintenance versus development dichotomy except
3948 by also being increasing.
3950 PERL_REVISION (Oldsyms.U):
3951 In a Perl version number such as 5.6.2, this is the 5.
3952 This value is manually set in patchlevel.h
3954 PERL_SUBVERSION (Oldsyms.U):
3955 In a Perl version number such as 5.6.2, this is the 2.
3956 Values greater than 50 represent potentially unstable
3957 development subversions.
3958 This value is manually set in patchlevel.h
3960 PERL_VERSION (Oldsyms.U):
3961 In a Perl version number such as 5.6.2, this is the 6.
3962 This value is manually set in patchlevel.h
3964 perladmin (perladmin.U):
3965 Electronic mail address of the perl5 administrator.
3968 The list of libraries needed by Perl only (any libraries needed
3969 by extensions only will by dropped, if using dynamic loading).
3971 perlpath (perlpath.U):
3972 This variable contains the eventual value of the PERLPATH symbol,
3973 which contains the name of the perl interpreter to be used in
3974 shell scripts and in the "eval 'exec'" idiom. This variable is
3975 not necessarily the pathname of the file containing the perl
3976 interpreter; you must append the executable extension (_exe) if
3977 it is not already present. Note that Perl code that runs during
3978 the Perl build process cannot reference this variable, as Perl
3979 may not have been installed, or even if installed, may be a
3980 different version of Perl.
3983 This variable is used internally by Configure to determine the
3984 full pathname (if any) of the pg program. After Configure runs,
3985 the value is reset to a plain "pg" and is not useful.
3987 phostname (myhostname.U):
3988 This variable contains the eventual value of the PHOSTNAME symbol,
3989 which is a command that can be fed to popen() to get the host name.
3990 The program should probably not presume that the domain is or isn't
3993 pidtype (pidtype.U):
3994 This variable defines PIDTYPE to be something like pid_t, int,
3995 ushort, or whatever type is used to declare process ids in the kernel.
3998 Holds the private path used by Configure to find out the libraries.
3999 Its value is prepend to libpth. This variable takes care of special
4000 machines, like the mips. Usually, it should be empty.
4003 This variable is defined but not used by Configure.
4004 The value is a plain '' and is not useful.
4007 This variable is defined but not used by Configure.
4008 The value is a plain '' and is not useful.
4011 This variable holds the name of the directory below which the
4012 user will install the package. Usually, this is /usr/local, and
4013 executables go in /usr/local/bin, library stuff in /usr/local/lib,
4014 man pages in /usr/local/man, etc. It is only used to set defaults
4015 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
4017 prefixexp (prefix.U):
4018 This variable holds the full absolute path of the directory below
4019 which the user will install the package. Derived from prefix.
4021 privlib (privlib.U):
4022 This variable contains the eventual value of the PRIVLIB symbol,
4023 which is the name of the private library for this package. It may
4024 have a ~ on the front. It is up to the makefile to eventually create
4025 this directory while performing installation (with ~ substitution).
4027 privlibexp (privlib.U):
4028 This variable is the ~name expanded version of privlib, so that you
4029 may use it directly in Makefiles or shell scripts.
4031 procselfexe (d_procselfexe.U):
4032 If d_procselfexe is defined, $procselfexe is the filename
4033 of the symbolic link pointing to the absolute pathname of
4034 the executing program.
4036 prototype (prototype.U):
4037 This variable holds the eventual value of CAN_PROTOTYPE, which
4038 indicates the C compiler can handle funciton prototypes.
4040 ptrsize (ptrsize.U):
4041 This variable contains the value of the PTRSIZE symbol, which
4042 indicates to the C program how many bytes there are in a pointer.
4044 quadkind (quadtype.U):
4045 This variable, if defined, encodes the type of a quad:
4046 1 = int, 2 = long, 3 = long long, 4 = int64_t.
4048 quadtype (quadtype.U):
4049 This variable defines Quad_t to be something like long, int,
4050 long long, int64_t, or whatever type is used for 64-bit integers.
4052 randbits (randfunc.U):
4053 Indicates how many bits are produced by the function used to
4054 generate normalized random numbers.
4056 randfunc (randfunc.U):
4057 Indicates the name of the random number function to use.
4058 Values include drand48, random, and rand. In C programs,
4059 the 'Drand01' macro is defined to generate uniformly distributed
4060 random numbers over the range [0., 1.[ (see drand01 and nrand).
4062 random_r_proto (d_random_r.U):
4063 This variable encodes the prototype of random_r.
4064 It is zero if d_random_r is undef, and one of the
4065 REENTRANT_PROTO_T_ABC macros of reentr.h if d_random_r
4068 randseedtype (randfunc.U):
4069 Indicates the type of the argument of the seedfunc.
4071 ranlib (orderlib.U):
4072 This variable is set to the pathname of the ranlib program, if it is
4073 needed to generate random libraries. Set to ":" if ar can generate
4074 random libraries or if random libraries are not supported
4076 rd_nodata (nblock_io.U):
4077 This variable holds the return code from read() when no data is
4078 present. It should be -1, but some systems return 0 when O_NDELAY is
4079 used, which is a shame because you cannot make the difference between
4080 no data and an EOF.. Sigh!
4082 readdir64_r_proto (d_readdir64_r.U):
4083 This variable encodes the prototype of readdir64_r.
4084 It is zero if d_readdir64_r is undef, and one of the
4085 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir64_r
4088 readdir_r_proto (d_readdir_r.U):
4089 This variable encodes the prototype of readdir_r.
4090 It is zero if d_readdir_r is undef, and one of the
4091 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir_r
4094 revision (patchlevel.U):
4095 The value of revision comes from the patchlevel.h file.
4096 In a version number such as 5.6.1, this is the "5".
4097 In patchlevel.h, this is referred to as "PERL_REVISION".
4100 This variable is used internally by Configure to determine the
4101 full pathname (if any) of the rm program. After Configure runs,
4102 the value is reset to a plain "rm" and is not useful.
4105 This variable is defined but not used by Configure.
4106 The value is a plain '' and is not useful.
4109 This variable contains the command used by Configure
4110 to copy and execute a cross-compiled executable in the
4111 target host. Useful and available only during Perl build.
4112 Empty string '' if not cross-compiling.
4115 This variable contains 'true' or 'false' depending whether the
4116 nm extraction should be performed or not, according to the value
4117 of usenm and the flags on the Configure command line.
4119 sched_yield (d_pthread_y.U):
4120 This variable defines the way to yield the execution
4121 of the current thread.
4123 scriptdir (scriptdir.U):
4124 This variable holds the name of the directory in which the user wants
4125 to put publicly scripts for the package in question. It is either
4126 the same directory as for binaries, or a special one that can be
4127 mounted across different architectures, like /usr/share. Programs
4128 must be prepared to deal with ~name expansion.
4130 scriptdirexp (scriptdir.U):
4131 This variable is the same as scriptdir, but is filename expanded
4132 at configuration time, for programs not wanting to bother with it.
4135 This variable is used internally by Configure to determine the
4136 full pathname (if any) of the sed program. After Configure runs,
4137 the value is reset to a plain "sed" and is not useful.
4139 seedfunc (randfunc.U):
4140 Indicates the random number generating seed function.
4141 Values include srand48, srandom, and srand.
4143 selectminbits (selectminbits.U):
4144 This variable holds the minimum number of bits operated by select.
4145 That is, if you do select(n, ...), how many bits at least will be
4146 cleared in the masks if some activity is detected. Usually this
4147 is either n or 32*ceil(n/32), especially many little-endians do
4148 the latter. This is only useful if you have select(), naturally.
4150 selecttype (selecttype.U):
4151 This variable holds the type used for the 2nd, 3rd, and 4th
4152 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
4153 is defined, and 'int *' otherwise. This is only useful if you
4154 have select(), naturally.
4157 This variable is defined but not used by Configure.
4158 The value is a plain '' and is not useful.
4160 setgrent_r_proto (d_setgrent_r.U):
4161 This variable encodes the prototype of setgrent_r.
4162 It is zero if d_setgrent_r is undef, and one of the
4163 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setgrent_r
4166 sethostent_r_proto (d_sethostent_r.U):
4167 This variable encodes the prototype of sethostent_r.
4168 It is zero if d_sethostent_r is undef, and one of the
4169 REENTRANT_PROTO_T_ABC macros of reentr.h if d_sethostent_r
4172 setlocale_r_proto (d_setlocale_r.U):
4173 This variable encodes the prototype of setlocale_r.
4174 It is zero if d_setlocale_r is undef, and one of the
4175 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setlocale_r
4178 setnetent_r_proto (d_setnetent_r.U):
4179 This variable encodes the prototype of setnetent_r.
4180 It is zero if d_setnetent_r is undef, and one of the
4181 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setnetent_r
4184 setprotoent_r_proto (d_setprotoent_r.U):
4185 This variable encodes the prototype of setprotoent_r.
4186 It is zero if d_setprotoent_r is undef, and one of the
4187 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setprotoent_r
4190 setpwent_r_proto (d_setpwent_r.U):
4191 This variable encodes the prototype of setpwent_r.
4192 It is zero if d_setpwent_r is undef, and one of the
4193 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setpwent_r
4196 setservent_r_proto (d_setservent_r.U):
4197 This variable encodes the prototype of setservent_r.
4198 It is zero if d_setservent_r is undef, and one of the
4199 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setservent_r
4203 This variable contains the full pathname of the shell used
4204 on this system to execute Bourne shell scripts. Usually, this will be
4205 /bin/sh, though it's possible that some systems will have /bin/ksh,
4206 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
4208 This unit comes before Options.U, so you can't set sh with a '-D'
4209 option, though you can override this (and startsh)
4210 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
4213 This variable is defined but not used by Configure.
4214 The value is a plain '' and is not useful.
4216 sharpbang (spitshell.U):
4217 This variable contains the string #! if this system supports that
4220 shmattype (d_shmat.U):
4221 This symbol contains the type of pointer returned by shmat().
4222 It can be 'void *' or 'char *'.
4224 shortsize (intsize.U):
4225 This variable contains the value of the SHORTSIZE symbol which
4226 indicates to the C program how many bytes there are in a short.
4228 shrpenv (libperl.U):
4229 If the user builds a shared libperl.so, then we need to tell the
4230 'perl' executable where it will be able to find the installed libperl.so.
4231 One way to do this on some systems is to set the environment variable
4232 LD_RUN_PATH to the directory that will be the final location of the
4233 shared libperl.so. The makefile can use this with something like
4234 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
4236 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
4239 See the main perl Makefile.SH for actual working usage.
4240 Alternatively, we might be able to use a command line option such
4241 as -R $archlibexp/CORE (Solaris) or -Wl,-rpath
4242 $archlibexp/CORE (Linux).
4244 shsharp (spitshell.U):
4245 This variable tells further Configure units whether your sh can
4248 sig_count (sig_name.U):
4249 This variable holds a number larger than the largest valid
4250 signal number. This is usually the same as the NSIG macro.
4252 sig_name (sig_name.U):
4253 This variable holds the signal names, space separated. The leading
4254 SIG in signal name is removed. A ZERO is prepended to the list.
4255 This is currently not used, sig_name_init is used instead.
4257 sig_name_init (sig_name.U):
4258 This variable holds the signal names, enclosed in double quotes and
4259 separated by commas, suitable for use in the SIG_NAME definition
4260 below. A "ZERO" is prepended to the list, and the list is
4261 terminated with a plain 0. The leading SIG in signal names
4262 is removed. See sig_num.
4264 sig_num (sig_name.U):
4265 This variable holds the signal numbers, space separated. A ZERO is
4266 prepended to the list (corresponding to the fake SIGZERO).
4267 Those numbers correspond to the value of the signal listed
4268 in the same place within the sig_name list.
4269 This is currently not used, sig_num_init is used instead.
4271 sig_num_init (sig_name.U):
4272 This variable holds the signal numbers, enclosed in double quotes and
4273 separated by commas, suitable for use in the SIG_NUM definition
4274 below. A "ZERO" is prepended to the list, and the list is
4275 terminated with a plain 0.
4277 sig_size (sig_name.U):
4278 This variable contains the number of elements of the sig_name
4281 signal_t (d_voidsig.U):
4282 This variable holds the type of the signal handler (void or int).
4284 sitearch (sitearch.U):
4285 This variable contains the eventual value of the SITEARCH symbol,
4286 which is the name of the private library for this package. It may
4287 have a ~ on the front. It is up to the makefile to eventually create
4288 this directory while performing installation (with ~ substitution).
4289 The standard distribution will put nothing in this directory.
4290 After perl has been installed, users may install their own local
4291 architecture-dependent modules in this directory with
4292 MakeMaker Makefile.PL
4293 or equivalent. See INSTALL for details.
4295 sitearchexp (sitearch.U):
4296 This variable is the ~name expanded version of sitearch, so that you
4297 may use it directly in Makefiles or shell scripts.
4299 sitebin (sitebin.U):
4300 This variable holds the name of the directory in which the user wants
4301 to put add-on publicly executable files for the package in question. It
4302 is most often a local directory such as /usr/local/bin. Programs using
4303 this variable must be prepared to deal with ~name substitution.
4304 The standard distribution will put nothing in this directory.
4305 After perl has been installed, users may install their own local
4306 executables in this directory with
4307 MakeMaker Makefile.PL
4308 or equivalent. See INSTALL for details.
4310 sitebinexp (sitebin.U):
4311 This is the same as the sitebin variable, but is filename expanded at
4312 configuration time, for use in your makefiles.
4314 sitehtml1dir (sitehtml1dir.U):
4315 This variable contains the name of the directory in which site-specific
4316 html source pages are to be put. It is the responsibility of the
4317 Makefile.SH to get the value of this into the proper command.
4318 You must be prepared to do the ~name expansion yourself.
4319 The standard distribution will put nothing in this directory.
4320 After perl has been installed, users may install their own local
4321 html pages in this directory with
4322 MakeMaker Makefile.PL
4323 or equivalent. See INSTALL for details.
4325 sitehtml1direxp (sitehtml1dir.U):
4326 This variable is the same as the sitehtml1dir variable, but is filename
4327 expanded at configuration time, for convenient use in makefiles.
4329 sitehtml3dir (sitehtml3dir.U):
4330 This variable contains the name of the directory in which site-specific
4331 library html source pages are to be put. It is the responsibility of the
4332 Makefile.SH to get the value of this into the proper command.
4333 You must be prepared to do the ~name expansion yourself.
4334 The standard distribution will put nothing in this directory.
4335 After perl has been installed, users may install their own local
4336 library html pages in this directory with
4337 MakeMaker Makefile.PL
4338 or equivalent. See INSTALL for details.
4340 sitehtml3direxp (sitehtml3dir.U):
4341 This variable is the same as the sitehtml3dir variable, but is filename
4342 expanded at configuration time, for convenient use in makefiles.
4344 sitelib (sitelib.U):
4345 This variable contains the eventual value of the SITELIB symbol,
4346 which is the name of the private library for this package. It may
4347 have a ~ on the front. It is up to the makefile to eventually create
4348 this directory while performing installation (with ~ substitution).
4349 The standard distribution will put nothing in this directory.
4350 After perl has been installed, users may install their own local
4351 architecture-independent modules in this directory with
4352 MakeMaker Makefile.PL
4353 or equivalent. See INSTALL for details.
4355 sitelib_stem (sitelib.U):
4356 This variable is $sitelibexp with any trailing version-specific component
4357 removed. The elements in inc_version_list (inc_version_list.U) can
4358 be tacked onto this variable to generate a list of directories to search.
4360 sitelibexp (sitelib.U):
4361 This variable is the ~name expanded version of sitelib, so that you
4362 may use it directly in Makefiles or shell scripts.
4364 siteman1dir (siteman1dir.U):
4365 This variable contains the name of the directory in which site-specific
4366 manual source pages are to be put. It is the responsibility of the
4367 Makefile.SH to get the value of this into the proper command.
4368 You must be prepared to do the ~name expansion yourself.
4369 The standard distribution will put nothing in this directory.
4370 After perl has been installed, users may install their own local
4371 man1 pages in this directory with
4372 MakeMaker Makefile.PL
4373 or equivalent. See INSTALL for details.
4375 siteman1direxp (siteman1dir.U):
4376 This variable is the same as the siteman1dir variable, but is filename
4377 expanded at configuration time, for convenient use in makefiles.
4379 siteman3dir (siteman3dir.U):
4380 This variable contains the name of the directory in which site-specific
4381 library man source pages are to be put. It is the responsibility of the
4382 Makefile.SH to get the value of this into the proper command.
4383 You must be prepared to do the ~name expansion yourself.
4384 The standard distribution will put nothing in this directory.
4385 After perl has been installed, users may install their own local
4386 man3 pages in this directory with
4387 MakeMaker Makefile.PL
4388 or equivalent. See INSTALL for details.
4390 siteman3direxp (siteman3dir.U):
4391 This variable is the same as the siteman3dir variable, but is filename
4392 expanded at configuration time, for convenient use in makefiles.
4394 siteprefix (siteprefix.U):
4395 This variable holds the full absolute path of the directory below
4396 which the user will install add-on packages.
4397 See INSTALL for usage and examples.
4399 siteprefixexp (siteprefix.U):
4400 This variable holds the full absolute path of the directory below
4401 which the user will install add-on packages. Derived from siteprefix.
4403 sitescript (sitescript.U):
4404 This variable holds the name of the directory in which the user wants
4405 to put add-on publicly executable files for the package in question. It
4406 is most often a local directory such as /usr/local/bin. Programs using
4407 this variable must be prepared to deal with ~name substitution.
4408 The standard distribution will put nothing in this directory.
4409 After perl has been installed, users may install their own local
4410 scripts in this directory with
4411 MakeMaker Makefile.PL
4412 or equivalent. See INSTALL for details.
4414 sitescriptexp (sitescript.U):
4415 This is the same as the sitescript variable, but is filename expanded at
4416 configuration time, for use in your makefiles.
4418 sizesize (sizesize.U):
4419 This variable contains the size of a sizetype in bytes.
4421 sizetype (sizetype.U):
4422 This variable defines sizetype to be something like size_t,
4423 unsigned long, or whatever type is used to declare length
4424 parameters for string functions.
4427 This variable is defined but not used by Configure.
4428 The value is a plain '' and is not useful.
4431 This variable is defined but not used by Configure.
4432 The value is a plain '' and is not useful.
4435 This variable holds the extension used to identify shared libraries
4436 (also known as shared objects) on the system. Usually set to 'so'.
4438 sockethdr (d_socket.U):
4439 This variable has any cpp '-I' flags needed for socket support.
4441 socketlib (d_socket.U):
4442 This variable has the names of any libraries needed for socket support.
4444 socksizetype (socksizetype.U):
4445 This variable holds the type used for the size argument
4446 for various socket calls like accept. Usual values include
4447 socklen_t, size_t, and int.
4450 This variable is used internally by Configure to determine the
4451 full pathname (if any) of the sort program. After Configure runs,
4452 the value is reset to a plain "sort" and is not useful.
4454 spackage (package.U):
4455 This variable contains the name of the package being constructed,
4456 with the first letter uppercased, i.e. suitable for starting
4459 spitshell (spitshell.U):
4460 This variable contains the command necessary to spit out a runnable
4461 shell on this system. It is either cat or a grep '-v' for # comments.
4463 sPRId64 (quadfio.U):
4464 This variable, if defined, contains the string used by stdio to
4465 format 64-bit decimal numbers (format 'd') for output.
4467 sPRIeldbl (longdblfio.U):
4468 This variable, if defined, contains the string used by stdio to
4469 format long doubles (format 'e') for output.
4471 sPRIEUldbl (longdblfio.U):
4472 This variable, if defined, contains the string used by stdio to
4473 format long doubles (format 'E') for output.
4474 The 'U' in the name is to separate this from sPRIeldbl so that even
4475 case-blind systems can see the difference.
4477 sPRIfldbl (longdblfio.U):
4478 This variable, if defined, contains the string used by stdio to
4479 format long doubles (format 'f') for output.
4481 sPRIFUldbl (longdblfio.U):
4482 This variable, if defined, contains the string used by stdio to
4483 format long doubles (format 'F') for output.
4484 The 'U' in the name is to separate this from sPRIfldbl so that even
4485 case-blind systems can see the difference.
4487 sPRIgldbl (longdblfio.U):
4488 This variable, if defined, contains the string used by stdio to
4489 format long doubles (format 'g') for output.
4491 sPRIGUldbl (longdblfio.U):
4492 This variable, if defined, contains the string used by stdio to
4493 format long doubles (format 'G') for output.
4494 The 'U' in the name is to separate this from sPRIgldbl so that even
4495 case-blind systems can see the difference.
4497 sPRIi64 (quadfio.U):
4498 This variable, if defined, contains the string used by stdio to
4499 format 64-bit decimal numbers (format 'i') for output.
4501 sPRIo64 (quadfio.U):
4502 This variable, if defined, contains the string used by stdio to
4503 format 64-bit octal numbers (format 'o') for output.
4505 sPRIu64 (quadfio.U):
4506 This variable, if defined, contains the string used by stdio to
4507 format 64-bit unsigned decimal numbers (format 'u') for output.
4509 sPRIx64 (quadfio.U):
4510 This variable, if defined, contains the string used by stdio to
4511 format 64-bit hexadecimal numbers (format 'x') for output.
4513 sPRIXU64 (quadfio.U):
4514 This variable, if defined, contains the string used by stdio to
4515 format 64-bit hExADECimAl numbers (format 'X') for output.
4516 The 'U' in the name is to separate this from sPRIx64 so that even
4517 case-blind systems can see the difference.
4519 srand48_r_proto (d_srand48_r.U):
4520 This variable encodes the prototype of srand48_r.
4521 It is zero if d_srand48_r is undef, and one of the
4522 REENTRANT_PROTO_T_ABC macros of reentr.h if d_srand48_r
4525 srandom_r_proto (d_srandom_r.U):
4526 This variable encodes the prototype of srandom_r.
4527 It is zero if d_srandom_r is undef, and one of the
4528 REENTRANT_PROTO_T_ABC macros of reentr.h if d_srandom_r
4532 This variable holds the path to the package source. It is up to
4533 the Makefile to use this variable and set VPATH accordingly to
4534 find the sources remotely.
4536 sSCNfldbl (longdblfio.U):
4537 This variable, if defined, contains the string used by stdio to
4538 format long doubles (format 'f') for input.
4540 ssizetype (ssizetype.U):
4541 This variable defines ssizetype to be something like ssize_t,
4542 long or int. It is used by functions that return a count
4543 of bytes or an error condition. It must be a signed type.
4544 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
4546 startperl (startperl.U):
4547 This variable contains the string to put on the front of a perl
4548 script to make sure (hopefully) that it runs with perl and not some
4549 shell. Of course, that leading line must be followed by the classical
4551 eval 'exec perl -S $0 ${1+"$@"}'
4552 if $running_under_some_shell;
4553 to guarantee perl startup should the shell execute the script. Note
4554 that this magic incatation is not understood by csh.
4556 startsh (startsh.U):
4557 This variable contains the string to put on the front of a shell
4558 script to make sure (hopefully) that it runs with sh and not some
4561 static_ext (Extensions.U):
4562 This variable holds a list of XS extension files we want to
4563 link statically into the package. It is used by Makefile.
4565 stdchar (stdchar.U):
4566 This variable conditionally defines STDCHAR to be the type of char
4567 used in stdio.h. It has the values "unsigned char" or "char".
4569 stdio_base (d_stdstdio.U):
4570 This variable defines how, given a FILE pointer, fp, to access the
4571 _base field (or equivalent) of stdio.h's FILE structure. This will
4572 be used to define the macro FILE_base(fp).
4574 stdio_bufsiz (d_stdstdio.U):
4575 This variable defines how, given a FILE pointer, fp, to determine
4576 the number of bytes store in the I/O buffer pointer to by the
4577 _base field (or equivalent) of stdio.h's FILE structure. This will
4578 be used to define the macro FILE_bufsiz(fp).
4580 stdio_cnt (d_stdstdio.U):
4581 This variable defines how, given a FILE pointer, fp, to access the
4582 _cnt field (or equivalent) of stdio.h's FILE structure. This will
4583 be used to define the macro FILE_cnt(fp).
4585 stdio_filbuf (d_stdstdio.U):
4586 This variable defines how, given a FILE pointer, fp, to tell
4587 stdio to refill its internal buffers (?). This will
4588 be used to define the macro FILE_filbuf(fp).
4590 stdio_ptr (d_stdstdio.U):
4591 This variable defines how, given a FILE pointer, fp, to access the
4592 _ptr field (or equivalent) of stdio.h's FILE structure. This will
4593 be used to define the macro FILE_ptr(fp).
4595 stdio_stream_array (stdio_streams.U):
4596 This variable tells the name of the array holding the stdio streams.
4597 Usual values include _iob, __iob, and __sF.
4599 strerror_r_proto (d_strerror_r.U):
4600 This variable encodes the prototype of strerror_r.
4601 It is zero if d_strerror_r is undef, and one of the
4602 REENTRANT_PROTO_T_ABC macros of reentr.h if d_strerror_r
4605 strings (i_string.U):
4606 This variable holds the full path of the string header that will be
4607 used. Typically /usr/include/string.h or /usr/include/strings.h.
4610 This variable is defined but not used by Configure.
4611 The value is a plain '' and is not useful.
4613 subversion (patchlevel.U):
4614 The subversion level of this package.
4615 The value of subversion comes from the patchlevel.h file.
4616 In a version number such as 5.6.1, this is the "1".
4617 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
4618 This is unique to perl.
4621 This variable holds the place where the manual is located on this
4622 system. It is not the place where the user wants to put his manual
4623 pages. Rather it is the place where Configure may look to find manual
4624 for unix commands (section 1 of the manual usually). See mansrc.
4627 This variable is defined but not used by Configure.
4628 The value is a plain '' and is not useful.
4631 This variable is defined but not used by Configure.
4632 The value is a plain '' and is not useful.
4634 targetarch (Cross.U):
4635 If cross-compiling, this variable contains the target architecture.
4636 If not, this will be empty.
4639 This variable is defined but not used by Configure.
4640 The value is a plain '' and is not useful.
4643 This variable is defined but not used by Configure.
4644 The value is a plain '' and is not useful.
4647 This variable is used internally by Configure to determine the
4648 full pathname (if any) of the test program. After Configure runs,
4649 the value is reset to a plain "test" and is not useful.
4651 timeincl (i_time.U):
4652 This variable holds the full path of the included time header(s).
4654 timetype (d_time.U):
4655 This variable holds the type returned by time(). It can be long,
4656 or time_t on BSD sites (in which case <sys/types.h> should be
4657 included). Anyway, the type Time_t should be used.
4659 tmpnam_r_proto (d_tmpnam_r.U):
4660 This variable encodes the prototype of tmpnam_r.
4661 It is zero if d_tmpnam_r is undef, and one of the
4662 REENTRANT_PROTO_T_ABC macros of reentr.h if d_tmpnam_r
4666 This variable contains the command used by Configure
4667 to copy to from the target host. Useful and available
4668 only during Perl build.
4669 The string ':' if not cross-compiling.
4672 This variable is used internally by Configure to determine the
4673 full pathname (if any) of the touch program. After Configure runs,
4674 the value is reset to a plain "touch" and is not useful.
4677 This variable is used internally by Configure to determine the
4678 full pathname (if any) of the tr program. After Configure runs,
4679 the value is reset to a plain "tr" and is not useful.
4682 This variable contains the value to be passed to the tr(1)
4683 command to transliterate a newline. Typical values are
4684 '\012' and '\n'. This is needed for EBCDIC systems where
4685 newline is not necessarily '\012'.
4688 This variable is defined but not used by Configure.
4689 The value is a plain '' and is not useful.
4691 ttyname_r_proto (d_ttyname_r.U):
4692 This variable encodes the prototype of ttyname_r.
4693 It is zero if d_ttyname_r is undef, and one of the
4694 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ttyname_r
4698 This variable is the size of an U16 in bytes.
4701 This variable contains the C type used for Perl's U16.
4704 This variable is the size of an U32 in bytes.
4707 This variable contains the C type used for Perl's U32.
4710 This variable is the size of an U64 in bytes.
4713 This variable contains the C type used for Perl's U64.
4716 This variable is the size of an U8 in bytes.
4719 This variable contains the C type used for Perl's U8.
4722 This variable contains the format string used for printing a Uid_t.
4724 uidsign (uidsign.U):
4725 This variable contains the signedness of a uidtype.
4726 1 for unsigned, -1 for signed.
4728 uidsize (uidsize.U):
4729 This variable contains the size of a uidtype in bytes.
4731 uidtype (uidtype.U):
4732 This variable defines Uid_t to be something like uid_t, int,
4733 ushort, or whatever type is used to declare user ids in the kernel.
4736 This variable is used internally by Configure to determine the
4737 full pathname (if any) of the uname program. After Configure runs,
4738 the value is reset to a plain "uname" and is not useful.
4741 This variable is used internally by Configure to determine the
4742 full pathname (if any) of the uniq program. After Configure runs,
4743 the value is reset to a plain "uniq" and is not useful.
4745 uquadtype (quadtype.U):
4746 This variable defines Uquad_t to be something like unsigned long,
4747 unsigned int, unsigned long long, uint64_t, or whatever type is
4748 used for 64-bit integers.
4750 use5005threads (usethreads.U):
4751 This variable conditionally defines the USE_5005THREADS symbol,
4752 and indicates that Perl should be built to use the 5.005-based
4753 threading implementation. Only valid up to 5.8.x.
4755 use64bitall (use64bits.U):
4756 This variable conditionally defines the USE_64_BIT_ALL symbol,
4757 and indicates that 64-bit integer types should be used
4758 when available. The maximal possible
4759 64-bitness is employed: LP64 or ILP64, meaning that you will
4760 be able to use more than 2 gigabytes of memory. This mode is
4761 even more binary incompatible than USE_64_BIT_INT. You may not
4762 be able to run the resulting executable in a 32-bit CPU at all or
4763 you may need at least to reboot your OS to 64-bit mode.
4765 use64bitint (use64bits.U):
4766 This variable conditionally defines the USE_64_BIT_INT symbol,
4767 and indicates that 64-bit integer types should be used
4768 when available. The minimal possible 64-bitness
4769 is employed, just enough to get 64-bit integers into Perl.
4770 This may mean using for example "long longs", while your memory
4771 may still be limited to 2 gigabytes.
4773 usecrosscompile (Cross.U):
4774 This variable conditionally defines the USE_CROSS_COMPILE symbol,
4775 and indicates that Perl has been cross-compiled.
4778 This variable indicates if the system supports dynamic
4779 loading of some sort. See also dlsrc and dlobj.
4781 usefaststdio (usefaststdio.U):
4782 This variable conditionally defines the USE_FAST_STDIO symbol,
4783 and indicates that Perl should be built to use 'fast stdio'.
4784 Defaults to define in Perls 5.8 and earlier, to undef later.
4786 useithreads (usethreads.U):
4787 This variable conditionally defines the USE_ITHREADS symbol,
4788 and indicates that Perl should be built to use the interpreter-based
4789 threading implementation.
4791 uselargefiles (uselfs.U):
4792 This variable conditionally defines the USE_LARGE_FILES symbol,
4793 and indicates that large file interfaces should be used when
4796 uselongdouble (uselongdbl.U):
4797 This variable conditionally defines the USE_LONG_DOUBLE symbol,
4798 and indicates that long doubles should be used when available.
4800 usemallocwrap (mallocsrc.U):
4801 This variable contains y if we are wrapping malloc to prevent
4802 integer overflow during size calculations.
4804 usemorebits (usemorebits.U):
4805 This variable conditionally defines the USE_MORE_BITS symbol,
4806 and indicates that explicit 64-bit interfaces and long doubles
4807 should be used when available.
4809 usemultiplicity (usemultiplicity.U):
4810 This variable conditionally defines the MULTIPLICITY symbol,
4811 and indicates that Perl should be built to use multiplicity.
4813 usemymalloc (mallocsrc.U):
4814 This variable contains y if the malloc that comes with this package
4815 is desired over the system's version of malloc. People often include
4816 special versions of malloc for effiency, but such versions are often
4817 less portable. See also mallocsrc and mallocobj.
4818 If this is 'y', then -lmalloc is removed from $libs.
4821 This variable contains 'true' or 'false' depending whether the
4822 nm extraction is wanted or not.
4824 useopcode (Extensions.U):
4825 This variable holds either 'true' or 'false' to indicate
4826 whether the Opcode extension should be used. The sole
4827 use for this currently is to allow an easy mechanism
4828 for users to skip the Opcode extension from the Configure
4831 useperlio (useperlio.U):
4832 This variable conditionally defines the USE_PERLIO symbol,
4833 and indicates that the PerlIO abstraction should be
4836 useposix (Extensions.U):
4837 This variable holds either 'true' or 'false' to indicate
4838 whether the POSIX extension should be used. The sole
4839 use for this currently is to allow an easy mechanism
4840 for hints files to indicate that POSIX will not compile
4841 on a particular system.
4843 usereentrant (usethreads.U):
4844 This variable conditionally defines the USE_REENTRANT_API symbol,
4845 which indicates that the thread code may try to use the various
4846 _r versions of library functions. This is only potentially
4847 meaningful if usethreads is set and is very experimental, it is
4848 not even prompted for.
4850 userelocatableinc (bin.U):
4851 This variable is set to true to indicate that perl should relocate
4852 @INC entries at runtime based on the path to the perl binary.
4853 Any @INC paths starting ".../" are relocated relative to the directory
4854 containing the perl binary, and a logical cleanup of the path is then
4855 made around the join point (removing "dir/../" pairs)
4858 This variable is set to true when the user agrees to use sfio.
4859 It is set to false when sfio is not available or when the user
4860 explicitely requests not to use sfio. It is here primarily so
4861 that command-line settings can override the auto-detection of
4862 d_sfio without running into a "WHOA THERE".
4864 useshrplib (libperl.U):
4865 This variable is set to 'true' if the user wishes
4866 to build a shared libperl, and 'false' otherwise.
4868 usesitecustomize (d_sitecustomize.U):
4869 This variable is set to true when the user requires a mechanism that
4870 allows the sysadmin to add entries to @INC at runtime. This variable
4871 being set, makes perl run '$sitelib/sitecustomize.pl' at startup.
4873 usesocks (usesocks.U):
4874 This variable conditionally defines the USE_SOCKS symbol,
4875 and indicates that Perl should be built to use SOCKS.
4877 usethreads (usethreads.U):
4878 This variable conditionally defines the USE_THREADS symbol,
4879 and indicates that Perl should be built to use threads.
4881 usevendorprefix (vendorprefix.U):
4882 This variable tells whether the vendorprefix
4883 and consequently other vendor* paths are in use.
4885 usevfork (d_vfork.U):
4886 This variable is set to true when the user accepts to use vfork.
4887 It is set to false when no vfork is available or when the user
4888 explicitely requests not to use vfork.
4891 This variable holds the path of the include files, which is
4892 usually /usr/include. It is mainly used by other Configure units.
4895 This variable is defined but not used by Configure.
4896 The value is a plain '' and is not useful.
4898 uvoformat (perlxvf.U):
4899 This variable contains the format string used for printing
4900 a Perl UV as an unsigned octal integer.
4903 This variable is the size of a UV in bytes.
4906 This variable contains the C type used for Perl's UV.
4908 uvuformat (perlxvf.U):
4909 This variable contains the format string used for printing
4910 a Perl UV as an unsigned decimal integer.
4912 uvxformat (perlxvf.U):
4913 This variable contains the format string used for printing
4914 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
4916 uvXUformat (perlxvf.U):
4917 This variable contains the format string used for printing
4918 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
4920 vendorarch (vendorarch.U):
4921 This variable contains the value of the PERL_VENDORARCH symbol.
4922 It may have a ~ on the front.
4923 The standard distribution will put nothing in this directory.
4924 Vendors who distribute perl may wish to place their own
4925 architecture-dependent modules and extensions in this directory with
4926 MakeMaker Makefile.PL INSTALLDIRS=vendor
4927 or equivalent. See INSTALL for details.
4929 vendorarchexp (vendorarch.U):
4930 This variable is the ~name expanded version of vendorarch, so that you
4931 may use it directly in Makefiles or shell scripts.
4933 vendorbin (vendorbin.U):
4934 This variable contains the eventual value of the VENDORBIN symbol.
4935 It may have a ~ on the front.
4936 The standard distribution will put nothing in this directory.
4937 Vendors who distribute perl may wish to place additional
4938 binaries in this directory with
4939 MakeMaker Makefile.PL INSTALLDIRS=vendor
4940 or equivalent. See INSTALL for details.
4942 vendorbinexp (vendorbin.U):
4943 This variable is the ~name expanded version of vendorbin, so that you
4944 may use it directly in Makefiles or shell scripts.
4946 vendorhtml1dir (vendorhtml1dir.U):
4947 This variable contains the name of the directory for html
4948 pages. It may have a ~ on the front.
4949 The standard distribution will put nothing in this directory.
4950 Vendors who distribute perl may wish to place their own
4951 html pages in this directory with
4952 MakeMaker Makefile.PL INSTALLDIRS=vendor
4953 or equivalent. See INSTALL for details.
4955 vendorhtml1direxp (vendorhtml1dir.U):
4956 This variable is the ~name expanded version of vendorhtml1dir, so that you
4957 may use it directly in Makefiles or shell scripts.
4959 vendorhtml3dir (vendorhtml3dir.U):
4960 This variable contains the name of the directory for html
4961 library pages. It may have a ~ on the front.
4962 The standard distribution will put nothing in this directory.
4963 Vendors who distribute perl may wish to place their own
4964 html pages for modules and extensions in this directory with
4965 MakeMaker Makefile.PL INSTALLDIRS=vendor
4966 or equivalent. See INSTALL for details.
4968 vendorhtml3direxp (vendorhtml3dir.U):
4969 This variable is the ~name expanded version of vendorhtml3dir, so that you
4970 may use it directly in Makefiles or shell scripts.
4972 vendorlib (vendorlib.U):
4973 This variable contains the eventual value of the VENDORLIB symbol,
4974 which is the name of the private library for this package.
4975 The standard distribution will put nothing in this directory.
4976 Vendors who distribute perl may wish to place their own
4977 modules in this directory with
4978 MakeMaker Makefile.PL INSTALLDIRS=vendor
4979 or equivalent. See INSTALL for details.
4981 vendorlib_stem (vendorlib.U):
4982 This variable is $vendorlibexp with any trailing version-specific component
4983 removed. The elements in inc_version_list (inc_version_list.U) can
4984 be tacked onto this variable to generate a list of directories to search.
4986 vendorlibexp (vendorlib.U):
4987 This variable is the ~name expanded version of vendorlib, so that you
4988 may use it directly in Makefiles or shell scripts.
4990 vendorman1dir (vendorman1dir.U):
4991 This variable contains the name of the directory for man1
4992 pages. It may have a ~ on the front.
4993 The standard distribution will put nothing in this directory.
4994 Vendors who distribute perl may wish to place their own
4995 man1 pages in this directory with
4996 MakeMaker Makefile.PL INSTALLDIRS=vendor
4997 or equivalent. See INSTALL for details.
4999 vendorman1direxp (vendorman1dir.U):
5000 This variable is the ~name expanded version of vendorman1dir, so that you
5001 may use it directly in Makefiles or shell scripts.
5003 vendorman3dir (vendorman3dir.U):
5004 This variable contains the name of the directory for man3
5005 pages. It may have a ~ on the front.
5006 The standard distribution will put nothing in this directory.
5007 Vendors who distribute perl may wish to place their own
5008 man3 pages in this directory with
5009 MakeMaker Makefile.PL INSTALLDIRS=vendor
5010 or equivalent. See INSTALL for details.
5012 vendorman3direxp (vendorman3dir.U):
5013 This variable is the ~name expanded version of vendorman3dir, so that you
5014 may use it directly in Makefiles or shell scripts.
5016 vendorprefix (vendorprefix.U):
5017 This variable holds the full absolute path of the directory below
5018 which the vendor will install add-on packages.
5019 See INSTALL for usage and examples.
5021 vendorprefixexp (vendorprefix.U):
5022 This variable holds the full absolute path of the directory below
5023 which the vendor will install add-on packages. Derived from vendorprefix.
5025 vendorscript (vendorscript.U):
5026 This variable contains the eventual value of the VENDORSCRIPT symbol.
5027 It may have a ~ on the front.
5028 The standard distribution will put nothing in this directory.
5029 Vendors who distribute perl may wish to place additional
5030 executable scripts in this directory with
5031 MakeMaker Makefile.PL INSTALLDIRS=vendor
5032 or equivalent. See INSTALL for details.
5034 vendorscriptexp (vendorscript.U):
5035 This variable is the ~name expanded version of vendorscript, so that you
5036 may use it directly in Makefiles or shell scripts.
5038 version (patchlevel.U):
5039 The full version number of this package, such as 5.6.1 (or 5_6_1).
5040 This combines revision, patchlevel, and subversion to get the
5041 full version number, including any possible subversions.
5042 This is suitable for use as a directory name, and hence is
5043 filesystem dependent.
5045 version_patchlevel_string (patchlevel.U):
5046 This is a string combining version, subversion and
5047 perl_patchlevel (if perl_patchlevel is non-zero).
5048 It is typically something like
5049 'version 7 subversion 1' or
5050 'version 7 subversion 1 patchlevel 11224'
5051 It is computed here to avoid duplication of code in myconfig.SH
5054 versiononly (versiononly.U):
5055 If set, this symbol indicates that only the version-specific
5056 components of a perl installation should be installed.
5057 This may be useful for making a test installation of a new
5058 version without disturbing the existing installation.
5059 Setting versiononly is equivalent to setting installperl's -v option.
5060 In particular, the non-versioned scripts and programs such as
5061 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
5062 (see INSTALL for a more complete list). Nor are the man
5064 Usually, this is undef.
5067 This variable is defined but not used by Configure.
5068 The value is a plain '' and is not useful.
5070 voidflags (voidflags.U):
5071 This variable contains the eventual value of the VOIDFLAGS symbol,
5072 which indicates how much support of the void type is given by this
5073 compiler. See VOIDFLAGS for more info.
5076 This variable holds extra path (space-separated) used to find
5077 libraries on this platform, for example CPU-specific libraries
5078 (on multi-CPU platforms) may be listed here.
5081 This variable holds the name of the compiler compiler we
5082 want to use in the Makefile. It can be yacc, byacc, or bison -y.
5085 This variable contains any additional yacc flags desired by the
5086 user. It is up to the Makefile to use this.
5089 This variable is defined but not used by Configure.
5090 The value is a plain '' and is not useful.
5093 This variable is used internally by Configure to determine the
5094 full pathname (if any) of the zip program. After Configure runs,
5095 the value is reset to a plain "zip" and is not useful.