1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
28 This variable is by default set to '/afs'. In the unlikely case
29 this is not the correct root, it is possible to override this with
30 a hint value or command line option. This will be used in subsequent
31 tests for AFSness in the Perl configure and test process.
33 alignbytes (alignbytes.U):
34 This variable holds the number of bytes required to align a
35 double-- or a long double when applicable. Usual values are
36 2, 4 and 8. The default is eight, for safety.
38 ansi2knr (ansi2knr.U):
39 This variable is set if the user needs to run ansi2knr.
40 Currently, this is not supported, so we just abort.
42 aphostname (d_gethname.U):
43 This variable contains the command which can be used to compute the
44 host name. The command is fully qualified by its absolute path, to make
45 it safe when used by a process with super-user privileges.
47 api_revision (patchlevel.U):
48 The three variables, api_revision, api_version, and
49 api_subversion, specify the version of the oldest perl binary
50 compatible with the present perl. In a full version string
51 such as '5.6.1', api_revision is the '5'.
52 Prior to 5.5.640, the format was a floating point number,
54 perl.c:incpush() and lib/lib.pm will automatically search in
55 $sitelib/.. for older directories back to the limit specified
56 by these api_ variables. This is only useful if you have a
57 perl library directory tree structured like the default one.
58 See INSTALL for how this works. The versioned site_perl
59 directory was introduced in 5.005, so that is the lowest
60 possible value. The version list appropriate for the current
61 system is determined in inc_version_list.U.
62 XXX To do: Since compatibility can depend on compile time
63 options (such as bincompat, longlong, etc.) it should
64 (perhaps) be set by Configure, but currently it isn't.
65 Currently, we read a hard-wired value from patchlevel.h.
66 Perhaps what we ought to do is take the hard-wired value from
67 patchlevel.h but then modify it if the current Configure
68 options warrant. patchlevel.h then would use an #ifdef guard.
70 api_subversion (patchlevel.U):
71 The three variables, api_revision, api_version, and
72 api_subversion, specify the version of the oldest perl binary
73 compatible with the present perl. In a full version string
74 such as '5.6.1', api_subversion is the '1'. See api_revision for
77 api_version (patchlevel.U):
78 The three variables, api_revision, api_version, and
79 api_subversion, specify the version of the oldest perl binary
80 compatible with the present perl. In a full version string
81 such as '5.6.1', api_version is the '6'. See api_revision for
82 full details. As a special case, 5.5.0 is rendered in the
83 old-style as 5.005. (In the 5.005_0x maintenance series,
84 this was the only versioned directory in $sitelib.)
86 api_versionstring (patchlevel.U):
87 This variable combines api_revision, api_version, and
88 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
89 for use as a directory name. This is filesystem dependent.
92 This variable is used internally by Configure to determine the
93 full pathname (if any) of the ar program. After Configure runs,
94 the value is reset to a plain "ar" and is not useful.
97 This variable holds the name of the directory in which the user wants
98 to put architecture-dependent public library files for $package.
99 It is most often a local directory such as /usr/local/lib.
100 Programs using this variable must be prepared to deal
101 with filename expansion.
103 archlibexp (archlib.U):
104 This variable is the same as the archlib variable, but is
105 filename expanded at configuration time, for convenient use.
107 archname64 (use64bits.U):
108 This variable is used for the 64-bitness part of $archname.
110 archname (archname.U):
111 This variable is a short name to characterize the current
112 architecture. It is used mainly to construct the default archlib.
115 This variable defines any additional objects that must be linked
116 in with the program on this architecture. On unix, it is usually
117 empty. It is typically used to include emulations of unix calls
118 or other facilities. For perl on OS/2, for example, this would
121 asctime_r_proto (d_asctime_r.U):
122 This variable encodes the prototype of asctime_r.
125 This variable is used internally by Configure to determine the
126 full pathname (if any) of the awk program. After Configure runs,
127 the value is reset to a plain "awk" and is not useful.
130 The base revision level of this package, from the .package file.
133 This variable is defined but not used by Configure.
134 The value is a plain '' and is not useful.
137 This variable holds the name of the directory in which the user wants
138 to put publicly executable images for the package in question. It
139 is most often a local directory such as /usr/local/bin. Programs using
140 this variable must be prepared to deal with ~name substitution.
142 bincompat5005 (bincompat5005.U):
143 This variable contains y if this version of Perl should be
144 binary-compatible with Perl 5.005.
147 This is the same as the bin variable, but is filename expanded at
148 configuration time, for use in your makefiles.
151 This variable is used internally by Configure to determine the
152 full pathname (if any) of the bison program. After Configure runs,
153 the value is reset to a plain "bison" and is not useful.
156 This variable is used internally by Configure to determine the
157 full pathname (if any) of the byacc program. After Configure runs,
158 the value is reset to a plain "byacc" and is not useful.
160 byteorder (byteorder.U):
161 This variable holds the byte order. In the following, larger digits
162 indicate more significance. The variable byteorder is either 4321
163 on a big-endian machine, or 1234 on a little-endian, or 87654321
164 on a Cray ... or 3412 with weird order !
167 This variable contains the \c string if that is what causes the echo
168 command to suppress newline. Otherwise it is null. Correct usage is
169 $echo $n "prompt for a question: $c".
171 castflags (d_castneg.U):
172 This variable contains a flag that precise difficulties the
173 compiler has casting odd floating values to unsigned long:
175 1 = couldn't cast < 0
176 2 = couldn't cast >= 0x80000000
177 4 = couldn't cast in argument expression list
180 This variable is used internally by Configure to determine the
181 full pathname (if any) of the cat program. After Configure runs,
182 the value is reset to a plain "cat" and is not useful.
185 This variable holds the name of a command to execute a C compiler which
186 can resolve multiple global references that happen to have the same
187 name. Usual values are 'cc' and 'gcc'.
188 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
190 cccdlflags (dlsrc.U):
191 This variable contains any special flags that might need to be
192 passed with 'cc -c' to compile modules to be used to create a shared
193 library that will be used for dynamic loading. For hpux, this
194 should be +z. It is up to the makefile to use it.
197 This variable contains any special flags that might need to be
198 passed to cc to link with a shared library for dynamic loading.
199 It is up to the makefile to use it. For sunos 4.1, it should
203 This variable contains any additional C compiler flags desired by
204 the user. It is up to the Makefile to use this.
206 ccflags_uselargefiles (uselfs.U):
207 This variable contains the compiler flags needed by large file builds
208 and added to ccflags by hints files.
211 This can set either by hints files or by Configure. If using
212 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
213 Some platforms, however, make good use of this by storing the
214 flavor of the C compiler being used here. For example if using
215 the Sun WorkShop suite, ccname will be 'workshop'.
217 ccsymbols (Cppsym.U):
218 The variable contains the symbols defined by the C compiler alone.
219 The symbols defined by cpp or by cc when it calls cpp are not in
220 this list, see cppsymbols and cppccsymbols.
221 The list is a space-separated list of symbol=value tokens.
223 ccversion (Checkcc.U):
224 This can set either by hints files or by Configure. If using
225 a (non-gcc) vendor cc, this variable may contain a version for
229 Login name of the person who ran the Configure script and answered the
230 questions. This is used to tag both config.sh and config_h.SH.
232 cf_email (cf_email.U):
233 Electronic mail address of the person who ran Configure. This can be
234 used by units that require the user's e-mail, like MailList.U.
237 Holds the output of the "date" command when the configuration file was
238 produced. This is used to tag both config.sh and config_h.SH.
240 charsize (charsize.U):
241 This variable contains the value of the CHARSIZE symbol, which
242 indicates to the C program how many bytes there are in a character.
245 This variable is defined but not used by Configure.
246 The value is a plain '' and is not useful.
249 This variable is used internally by Configure to determine the
250 full pathname (if any) of the chmod program. After Configure runs,
251 the value is reset to a plain "chmod" and is not useful.
254 This variable is defined but not used by Configure.
255 The value is a plain '' and is not useful.
257 clocktype (d_times.U):
258 This variable holds the type returned by times(). It can be long,
259 or clock_t on BSD sites (in which case <sys/types.h> should be
263 This variable is used internally by Configure to determine the
264 full pathname (if any) of the comm program. After Configure runs,
265 the value is reset to a plain "comm" and is not useful.
268 This variable is defined but not used by Configure.
269 The value is a plain '' and is not useful.
271 contains (contains.U):
272 This variable holds the command to do a grep with a proper return
273 status. On most sane systems it is simply "grep". On insane systems
274 it is a grep followed by a cat followed by a test. This variable
275 is primarily for the use of other Configure units.
278 This variable is used internally by Configure to determine the
279 full pathname (if any) of the cp program. After Configure runs,
280 the value is reset to a plain "cp" and is not useful.
283 This variable is defined but not used by Configure.
284 The value is a plain '' and is not useful.
287 This variable is used internally by Configure to determine the
288 full pathname (if any) of the cpp program. After Configure runs,
289 the value is reset to a plain "cpp" and is not useful.
291 cpp_stuff (cpp_stuff.U):
292 This variable contains an identification of the catenation mechanism
293 used by the C preprocessor.
295 cppccsymbols (Cppsym.U):
296 The variable contains the symbols defined by the C compiler
297 when it calls cpp. The symbols defined by the cc alone or cpp
298 alone are not in this list, see ccsymbols and cppsymbols.
299 The list is a space-separated list of symbol=value tokens.
301 cppflags (ccflags.U):
302 This variable holds the flags that will be passed to the C pre-
303 processor. It is up to the Makefile to use it.
305 cpplast (cppstdin.U):
306 This variable has the same functionality as cppminus, only it applies
307 to cpprun and not cppstdin.
309 cppminus (cppstdin.U):
310 This variable contains the second part of the string which will invoke
311 the C preprocessor on the standard input and produce to standard
312 output. This variable will have the value "-" if cppstdin needs
313 a minus to specify standard input, otherwise the value is "".
316 This variable contains the command which will invoke a C preprocessor
317 on standard input and put the output to stdout. It is guaranteed not
318 to be a wrapper and may be a null string if no preprocessor can be
319 made directly available. This preprocessor might be different from the
320 one used by the C compiler. Don't forget to append cpplast after the
321 preprocessor options.
323 cppstdin (cppstdin.U):
324 This variable contains the command which will invoke the C
325 preprocessor on standard input and put the output to stdout.
326 It is primarily used by other Configure units that ask about
327 preprocessor symbols.
329 cppsymbols (Cppsym.U):
330 The variable contains the symbols defined by the C preprocessor
331 alone. The symbols defined by cc or by cc when it calls cpp are
332 not in this list, see ccsymbols and cppccsymbols.
333 The list is a space-separated list of symbol=value tokens.
335 crypt_r_proto (d_crypt_r.U):
336 This variable encodes the prototype of crypt_r.
338 cryptlib (d_crypt.U):
339 This variable holds -lcrypt or the path to a libcrypt.a archive if
340 the crypt() function is not defined in the standard C library. It is
341 up to the Makefile to use this.
344 This variable is used internally by Configure to determine the
345 full pathname (if any) of the csh program. After Configure runs,
346 the value is reset to a plain "csh" and is not useful.
348 ctermid_r_proto (d_ctermid_r.U):
349 This variable encodes the prototype of ctermid_r.
351 ctime_r_proto (d_ctime_r.U):
352 This variable encodes the prototype of ctime_r.
354 d__fwalk (d__fwalk.U):
355 This variable conditionally defines HAS__FWALK if _fwalk() is
356 available to apply a function to all the file handles.
358 d_access (d_access.U):
359 This variable conditionally defines HAS_ACCESS if the access() system
360 call is available to check for access permissions using real IDs.
362 d_accessx (d_accessx.U):
363 This variable conditionally defines the HAS_ACCESSX symbol, which
364 indicates to the C program that the accessx() routine is available.
367 This variable conditionally defines the HAS_ALARM symbol, which
368 indicates to the C program that the alarm() routine is available.
370 d_archlib (archlib.U):
371 This variable conditionally defines ARCHLIB to hold the pathname
372 of architecture-dependent library files for $package. If
373 $archlib is the same as $privlib, then this is set to undef.
375 d_asctime_r (d_asctime_r.U):
376 This variable conditionally defines the HAS_ASCTIME_R symbol,
377 which indicates to the C program that the asctime_r()
378 routine is available.
381 This variable conditionally defines the HAS_ATOLF symbol, which
382 indicates to the C program that the atolf() routine is available.
385 This variable conditionally defines the HAS_ATOLL symbol, which
386 indicates to the C program that the atoll() routine is available.
388 d_attribut (d_attribut.U):
389 This variable conditionally defines HASATTRIBUTE, which
390 indicates the C compiler can check for function attributes,
391 such as printf formats.
394 This variable conditionally defines the HAS_BCMP symbol if
395 the bcmp() routine is available to compare strings.
398 This variable conditionally defines the HAS_BCOPY symbol if
399 the bcopy() routine is available to copy strings.
401 d_bincompat5005 (bincompat5005.U):
402 This variable conditionally defines BINCOMPAT5005 so that embed.h
403 can take special action if this version of Perl should be
404 binary-compatible with Perl 5.005. This is impossible for builds
405 that use features like threads and multiplicity it is always $undef
409 This symbol conditionally defines the symbol BSD when running on a
412 d_bsdgetpgrp (d_getpgrp.U):
413 This variable conditionally defines USE_BSD_GETPGRP if
414 getpgrp needs one arguments whereas USG one needs none.
416 d_bsdsetpgrp (d_setpgrp.U):
417 This variable conditionally defines USE_BSD_SETPGRP if
418 setpgrp needs two arguments whereas USG one needs none.
419 See also d_setpgid for a POSIX interface.
422 This variable conditionally defines the HAS_BZERO symbol if
423 the bzero() routine is available to set memory to 0.
425 d_casti32 (d_casti32.U):
426 This variable conditionally defines CASTI32, which indicates
427 whether the C compiler can cast large floats to 32-bit ints.
429 d_castneg (d_castneg.U):
430 This variable conditionally defines CASTNEG, which indicates
431 wether the C compiler can cast negative float to unsigned.
433 d_charvspr (d_vprintf.U):
434 This variable conditionally defines CHARVSPRINTF if this system
435 has vsprintf returning type (char*). The trend seems to be to
436 declare it as "int vsprintf()".
439 This variable conditionally defines the HAS_CHOWN symbol, which
440 indicates to the C program that the chown() routine is available.
442 d_chroot (d_chroot.U):
443 This variable conditionally defines the HAS_CHROOT symbol, which
444 indicates to the C program that the chroot() routine is available.
446 d_chsize (d_chsize.U):
447 This variable conditionally defines the CHSIZE symbol, which
448 indicates to the C program that the chsize() routine is available
449 to truncate files. You might need a -lx to get this routine.
452 This variable conditionally defines the HAS_CLASS symbol, which
453 indicates to the C program that the class() routine is available.
455 d_closedir (d_closedir.U):
456 This variable conditionally defines HAS_CLOSEDIR if closedir() is
459 d_cmsghdr_s (d_cmsghdr_s.U):
460 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
461 which indicates that the struct cmsghdr is supported.
464 This variable conditionally defines the HASCONST symbol, which
465 indicates to the C program that this C compiler knows about the
469 This variable conditionally defines the CRYPT symbol, which
470 indicates to the C program that the crypt() routine is available
471 to encrypt passwords and the like.
473 d_crypt_r (d_crypt_r.U):
474 This variable conditionally defines the HAS_CRYPT_R symbol,
475 which indicates to the C program that the crypt_r()
476 routine is available.
479 This variable conditionally defines the CSH symbol, which
480 indicates to the C program that the C-shell exists.
482 d_ctermid_r (d_ctermid_r.U):
483 This variable conditionally defines the HAS_CTERMID_R symbol,
484 which indicates to the C program that the ctermid_r()
485 routine is available.
487 d_ctime_r (d_ctime_r.U):
488 This variable conditionally defines the HAS_CTIME_R symbol,
489 which indicates to the C program that the ctime_r()
490 routine is available.
492 d_cuserid (d_cuserid.U):
493 This variable conditionally defines the HAS_CUSERID symbol, which
494 indicates to the C program that the cuserid() routine is available
495 to get character login names.
497 d_dbl_dig (d_dbl_dig.U):
498 This variable conditionally defines d_dbl_dig if this system's
499 header files provide DBL_DIG, which is the number of significant
500 digits in a double precision number.
502 d_dbminitproto (d_dbminitproto.U):
503 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
504 which indicates to the C program that the system provides
505 a prototype for the dbminit() function. Otherwise, it is
506 up to the program to supply one.
508 d_difftime (d_difftime.U):
509 This variable conditionally defines the HAS_DIFFTIME symbol, which
510 indicates to the C program that the difftime() routine is available.
513 This variable conditionally defines the HAS_DIRFD constant,
514 which indicates to the C program that dirfd() is available
515 to return the file descriptor of a directory stream.
517 d_dirnamlen (i_dirent.U):
518 This variable conditionally defines DIRNAMLEN, which indicates
519 to the C program that the length of directory entry names is
520 provided by a d_namelen field.
522 d_dlerror (d_dlerror.U):
523 This variable conditionally defines the HAS_DLERROR symbol, which
524 indicates to the C program that the dlerror() routine is available.
526 d_dlopen (d_dlopen.U):
527 This variable conditionally defines the HAS_DLOPEN symbol, which
528 indicates to the C program that the dlopen() routine is available.
530 d_dlsymun (d_dlsymun.U):
531 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
532 indicates that we need to prepend an underscore to the symbol
533 name before calling dlsym().
535 d_dosuid (d_dosuid.U):
536 This variable conditionally defines the symbol DOSUID, which
537 tells the C program that it should insert setuid emulation code
538 on hosts which have setuid #! scripts disabled.
540 d_drand48_r (d_drand48_r.U):
541 This variable conditionally defines the HAS_DRAND48_R symbol,
542 which indicates to the C program that the drand48_r()
543 routine is available.
545 d_drand48proto (d_drand48proto.U):
546 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
547 which indicates to the C program that the system provides
548 a prototype for the drand48() function. Otherwise, it is
549 up to the program to supply one.
552 This variable conditionally defines HAS_DUP2 if dup2() is
553 available to duplicate file descriptors.
555 d_eaccess (d_eaccess.U):
556 This variable conditionally defines the HAS_EACCESS symbol, which
557 indicates to the C program that the eaccess() routine is available.
559 d_endgrent (d_endgrent.U):
560 This variable conditionally defines the HAS_ENDGRENT symbol, which
561 indicates to the C program that the endgrent() routine is available
562 for sequential access of the group database.
564 d_endgrent_r (d_endgrent_r.U):
565 This variable conditionally defines the HAS_ENDGRENT_R symbol,
566 which indicates to the C program that the endgrent_r()
567 routine is available.
569 d_endhent (d_endhent.U):
570 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
571 available to close whatever was being used for host queries.
573 d_endhostent_r (d_endhostent_r.U):
574 This variable conditionally defines the HAS_ENDHOSTENT_R symbol,
575 which indicates to the C program that the endhostent_r()
576 routine is available.
578 d_endnent (d_endnent.U):
579 This variable conditionally defines HAS_ENDNETENT if endnetent() is
580 available to close whatever was being used for network queries.
582 d_endnetent_r (d_endnetent_r.U):
583 This variable conditionally defines the HAS_ENDNETENT_R symbol,
584 which indicates to the C program that the endnetent_r()
585 routine is available.
587 d_endpent (d_endpent.U):
588 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
589 available to close whatever was being used for protocol queries.
591 d_endprotoent_r (d_endprotoent_r.U):
592 This variable conditionally defines the HAS_ENDPROTOENT_R symbol,
593 which indicates to the C program that the endprotoent_r()
594 routine is available.
596 d_endpwent (d_endpwent.U):
597 This variable conditionally defines the HAS_ENDPWENT symbol, which
598 indicates to the C program that the endpwent() routine is available
599 for sequential access of the passwd database.
601 d_endpwent_r (d_endpwent_r.U):
602 This variable conditionally defines the HAS_ENDPWENT_R symbol,
603 which indicates to the C program that the endpwent_r()
604 routine is available.
606 d_endsent (d_endsent.U):
607 This variable conditionally defines HAS_ENDSERVENT if endservent() is
608 available to close whatever was being used for service queries.
610 d_endservent_r (d_endservent_r.U):
611 This variable conditionally defines the HAS_ENDSERVENT_R symbol,
612 which indicates to the C program that the endservent_r()
613 routine is available.
615 d_eofnblk (nblock_io.U):
616 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
617 when reading from a non-blocking I/O source.
620 This variable conditionally defines the symbols EUNICE and VAX, which
621 alerts the C program that it must deal with ideosyncracies of VMS.
623 d_fchdir (d_fchdir.U):
624 This variable conditionally defines the HAS_FCHDIR symbol, which
625 indicates to the C program that the fchdir() routine is available.
627 d_fchmod (d_fchmod.U):
628 This variable conditionally defines the HAS_FCHMOD symbol, which
629 indicates to the C program that the fchmod() routine is available
630 to change mode of opened files.
632 d_fchown (d_fchown.U):
633 This variable conditionally defines the HAS_FCHOWN symbol, which
634 indicates to the C program that the fchown() routine is available
635 to change ownership of opened files.
638 This variable conditionally defines the HAS_FCNTL symbol, and indicates
639 whether the fcntl() function exists
641 d_fcntl_can_lock (d_fcntl_can_lock.U):
642 This variable conditionally defines the FCNTL_CAN_LOCK symbol
643 and indicates whether file locking with fcntl() works.
645 d_fd_macros (d_fd_set.U):
646 This variable contains the eventual value of the HAS_FD_MACROS symbol,
647 which indicates if your C compiler knows about the macros which
648 manipulate an fd_set.
650 d_fd_set (d_fd_set.U):
651 This variable contains the eventual value of the HAS_FD_SET symbol,
652 which indicates if your C compiler knows about the fd_set typedef.
654 d_fds_bits (d_fd_set.U):
655 This variable contains the eventual value of the HAS_FDS_BITS symbol,
656 which indicates if your fd_set typedef contains the fds_bits member.
657 If you have an fd_set typedef, but the dweebs who installed it did
658 a half-fast job and neglected to provide the macros to manipulate
659 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
661 d_fgetpos (d_fgetpos.U):
662 This variable conditionally defines HAS_FGETPOS if fgetpos() is
663 available to get the file position indicator.
665 d_finite (d_finite.U):
666 This variable conditionally defines the HAS_FINITE symbol, which
667 indicates to the C program that the finite() routine is available.
669 d_finitel (d_finitel.U):
670 This variable conditionally defines the HAS_FINITEL symbol, which
671 indicates to the C program that the finitel() routine is available.
673 d_flexfnam (d_flexfnam.U):
674 This variable conditionally defines the FLEXFILENAMES symbol, which
675 indicates that the system supports filenames longer than 14 characters.
678 This variable conditionally defines HAS_FLOCK if flock() is
679 available to do file locking.
681 d_flockproto (d_flockproto.U):
682 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
683 which indicates to the C program that the system provides
684 a prototype for the flock() function. Otherwise, it is
685 up to the program to supply one.
688 This variable conditionally defines the HAS_FORK symbol, which
689 indicates to the C program that the fork() routine is available.
691 d_fp_class (d_fp_class.U):
692 This variable conditionally defines the HAS_FP_CLASS symbol, which
693 indicates to the C program that the fp_class() routine is available.
695 d_fpathconf (d_pathconf.U):
696 This variable conditionally defines the HAS_FPATHCONF symbol, which
697 indicates to the C program that the pathconf() routine is available
698 to determine file-system related limits and options associated
699 with a given open file descriptor.
701 d_fpclass (d_fpclass.U):
702 This variable conditionally defines the HAS_FPCLASS symbol, which
703 indicates to the C program that the fpclass() routine is available.
705 d_fpclassify (d_fpclassify.U):
706 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
707 indicates to the C program that the fpclassify() routine is available.
709 d_fpclassl (d_fpclassl.U):
710 This variable conditionally defines the HAS_FPCLASSL symbol, which
711 indicates to the C program that the fpclassl() routine is available.
713 d_fpos64_t (d_fpos64_t.U):
714 This symbol will be defined if the C compiler supports fpos64_t.
716 d_frexpl (d_frexpl.U):
717 This variable conditionally defines the HAS_FREXPL symbol, which
718 indicates to the C program that the frexpl() routine is available.
720 d_fs_data_s (d_fs_data_s.U):
721 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
722 which indicates that the struct fs_data is supported.
724 d_fseeko (d_fseeko.U):
725 This variable conditionally defines the HAS_FSEEKO symbol, which
726 indicates to the C program that the fseeko() routine is available.
728 d_fsetpos (d_fsetpos.U):
729 This variable conditionally defines HAS_FSETPOS if fsetpos() is
730 available to set the file position indicator.
732 d_fstatfs (d_fstatfs.U):
733 This variable conditionally defines the HAS_FSTATFS symbol, which
734 indicates to the C program that the fstatfs() routine is available.
736 d_fstatvfs (d_statvfs.U):
737 This variable conditionally defines the HAS_FSTATVFS symbol, which
738 indicates to the C program that the fstatvfs() routine is available.
741 This variable conditionally defines the HAS_FSYNC symbol, which
742 indicates to the C program that the fsync() routine is available.
744 d_ftello (d_ftello.U):
745 This variable conditionally defines the HAS_FTELLO symbol, which
746 indicates to the C program that the ftello() routine is available.
749 This variable conditionally defines the HAS_FTIME symbol, which indicates
750 that the ftime() routine exists. The ftime() routine is basically
751 a sub-second accuracy clock.
753 d_Gconvert (d_gconvert.U):
754 This variable holds what Gconvert is defined as to convert
755 floating point numbers into strings. By default, Configure
756 sets this macro to use the first of gconvert, gcvt, or sprintf
757 that pass sprintf-%g-like behaviour tests. If perl is using
758 long doubles, the macro uses the first of the following
759 functions that pass Configure's tests: qgcvt, sprintf (if
760 Configure knows how to make sprintf format long doubles--see
761 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
762 The gconvert_preference and gconvert_ld_preference variables
763 can be used to alter Configure's preferences, for doubles and
764 long doubles, respectively. If present, they contain a
765 space-separated list of one or more of the above function
766 names in the order they should be tried.
767 d_Gconvert may be set to override Configure with a platform-
768 specific function. If this function expects a double, a
769 different value may need to be set by the uselongdouble.cbu
770 call-back unit so that long doubles can be formatted without
773 d_getcwd (d_getcwd.U):
774 This variable conditionally defines the HAS_GETCWD symbol, which
775 indicates to the C program that the getcwd() routine is available
776 to get the current working directory.
778 d_getespwnam (d_getespwnam.U):
779 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
780 available to retrieve enchanced (shadow) password entries by name.
782 d_getfsstat (d_getfsstat.U):
783 This variable conditionally defines the HAS_GETFSSTAT symbol, which
784 indicates to the C program that the getfsstat() routine is available.
786 d_getgrent (d_getgrent.U):
787 This variable conditionally defines the HAS_GETGRENT symbol, which
788 indicates to the C program that the getgrent() routine is available
789 for sequential access of the group database.
791 d_getgrent_r (d_getgrent_r.U):
792 This variable conditionally defines the HAS_GETGRENT_R symbol,
793 which indicates to the C program that the getgrent_r()
794 routine is available.
796 d_getgrgid_r (d_getgrgid_r.U):
797 This variable conditionally defines the HAS_GETGRGID_R symbol,
798 which indicates to the C program that the getgrgid_r()
799 routine is available.
801 d_getgrnam_r (d_getgrnam_r.U):
802 This variable conditionally defines the HAS_GETGRNAM_R symbol,
803 which indicates to the C program that the getgrnam_r()
804 routine is available.
806 d_getgrps (d_getgrps.U):
807 This variable conditionally defines the HAS_GETGROUPS symbol, which
808 indicates to the C program that the getgroups() routine is available
809 to get the list of process groups.
811 d_gethbyaddr (d_gethbyad.U):
812 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
813 indicates to the C program that the gethostbyaddr() routine is available
814 to look up hosts by their IP addresses.
816 d_gethbyname (d_gethbynm.U):
817 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
818 indicates to the C program that the gethostbyname() routine is available
819 to look up host names in some data base or other.
821 d_gethent (d_gethent.U):
822 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
823 available to look up host names in some data base or another.
825 d_gethname (d_gethname.U):
826 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
827 indicates to the C program that the gethostname() routine may be
828 used to derive the host name.
830 d_gethostbyaddr_r (d_gethostbyaddr_r.U):
831 This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,
832 which indicates to the C program that the gethostbyaddr_r()
833 routine is available.
835 d_gethostbyname_r (d_gethostbyname_r.U):
836 This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,
837 which indicates to the C program that the gethostbyname_r()
838 routine is available.
840 d_gethostent_r (d_gethostent_r.U):
841 This variable conditionally defines the HAS_GETHOSTENT_R symbol,
842 which indicates to the C program that the gethostent_r()
843 routine is available.
845 d_gethostprotos (d_gethostprotos.U):
846 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
847 which indicates to the C program that <netdb.h> supplies
848 prototypes for the various gethost*() functions.
849 See also netdbtype.U for probing for various netdb types.
851 d_getitimer (d_getitimer.U):
852 This variable conditionally defines the HAS_GETITIMER symbol, which
853 indicates to the C program that the getitimer() routine is available.
855 d_getlogin (d_getlogin.U):
856 This variable conditionally defines the HAS_GETLOGIN symbol, which
857 indicates to the C program that the getlogin() routine is available
858 to get the login name.
860 d_getlogin_r (d_getlogin_r.U):
861 This variable conditionally defines the HAS_GETLOGIN_R symbol,
862 which indicates to the C program that the getlogin_r()
863 routine is available.
865 d_getmnt (d_getmnt.U):
866 This variable conditionally defines the HAS_GETMNT symbol, which
867 indicates to the C program that the getmnt() routine is available
868 to retrieve one or more mount info blocks by filename.
870 d_getmntent (d_getmntent.U):
871 This variable conditionally defines the HAS_GETMNTENT symbol, which
872 indicates to the C program that the getmntent() routine is available
873 to iterate through mounted files to get their mount info.
875 d_getnbyaddr (d_getnbyad.U):
876 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
877 indicates to the C program that the getnetbyaddr() routine is available
878 to look up networks by their IP addresses.
880 d_getnbyname (d_getnbynm.U):
881 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
882 indicates to the C program that the getnetbyname() routine is available
883 to look up networks by their names.
885 d_getnent (d_getnent.U):
886 This variable conditionally defines HAS_GETNETENT if getnetent() is
887 available to look up network names in some data base or another.
889 d_getnetbyaddr_r (d_getnetbyaddr_r.U):
890 This variable conditionally defines the HAS_GETNETBYADDR_R symbol,
891 which indicates to the C program that the getnetbyaddr_r()
892 routine is available.
894 d_getnetbyname_r (d_getnetbyname_r.U):
895 This variable conditionally defines the HAS_GETNETBYNAME_R symbol,
896 which indicates to the C program that the getnetbyname_r()
897 routine is available.
899 d_getnetent_r (d_getnetent_r.U):
900 This variable conditionally defines the HAS_GETNETENT_R symbol,
901 which indicates to the C program that the getnetent_r()
902 routine is available.
904 d_getnetprotos (d_getnetprotos.U):
905 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
906 which indicates to the C program that <netdb.h> supplies
907 prototypes for the various getnet*() functions.
908 See also netdbtype.U for probing for various netdb types.
910 d_getpagsz (d_getpagsz.U):
911 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
912 is available to get the system page size.
914 d_getpbyname (d_getprotby.U):
915 This variable conditionally defines the HAS_GETPROTOBYNAME
916 symbol, which indicates to the C program that the
917 getprotobyname() routine is available to look up protocols
920 d_getpbynumber (d_getprotby.U):
921 This variable conditionally defines the HAS_GETPROTOBYNUMBER
922 symbol, which indicates to the C program that the
923 getprotobynumber() routine is available to look up protocols
926 d_getpent (d_getpent.U):
927 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
928 available to look up protocols in some data base or another.
930 d_getpgid (d_getpgid.U):
931 This variable conditionally defines the HAS_GETPGID symbol, which
932 indicates to the C program that the getpgid(pid) function
933 is available to get the process group id.
935 d_getpgrp2 (d_getpgrp2.U):
936 This variable conditionally defines the HAS_GETPGRP2 symbol, which
937 indicates to the C program that the getpgrp2() (as in DG/UX) routine
938 is available to get the current process group.
940 d_getpgrp (d_getpgrp.U):
941 This variable conditionally defines HAS_GETPGRP if getpgrp() is
942 available to get the current process group.
944 d_getppid (d_getppid.U):
945 This variable conditionally defines the HAS_GETPPID symbol, which
946 indicates to the C program that the getppid() routine is available
947 to get the parent process ID.
949 d_getprior (d_getprior.U):
950 This variable conditionally defines HAS_GETPRIORITY if getpriority()
951 is available to get a process's priority.
953 d_getprotobyname_r (d_getprotobyname_r.U):
954 This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,
955 which indicates to the C program that the getprotobyname_r()
956 routine is available.
958 d_getprotobynumber_r (d_getprotobynumber_r.U):
959 This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,
960 which indicates to the C program that the getprotobynumber_r()
961 routine is available.
963 d_getprotoent_r (d_getprotoent_r.U):
964 This variable conditionally defines the HAS_GETPROTOENT_R symbol,
965 which indicates to the C program that the getprotoent_r()
966 routine is available.
968 d_getprotoprotos (d_getprotoprotos.U):
969 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
970 which indicates to the C program that <netdb.h> supplies
971 prototypes for the various getproto*() functions.
972 See also netdbtype.U for probing for various netdb types.
974 d_getprpwnam (d_getprpwnam.U):
975 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
976 available to retrieve protected (shadow) password entries by name.
978 d_getpwent (d_getpwent.U):
979 This variable conditionally defines the HAS_GETPWENT symbol, which
980 indicates to the C program that the getpwent() routine is available
981 for sequential access of the passwd database.
983 d_getpwent_r (d_getpwent_r.U):
984 This variable conditionally defines the HAS_GETPWENT_R symbol,
985 which indicates to the C program that the getpwent_r()
986 routine is available.
988 d_getpwnam_r (d_getpwnam_r.U):
989 This variable conditionally defines the HAS_GETPWNAM_R symbol,
990 which indicates to the C program that the getpwnam_r()
991 routine is available.
993 d_getpwuid_r (d_getpwuid_r.U):
994 This variable conditionally defines the HAS_GETPWUID_R symbol,
995 which indicates to the C program that the getpwuid_r()
996 routine is available.
998 d_getsbyname (d_getsrvby.U):
999 This variable conditionally defines the HAS_GETSERVBYNAME
1000 symbol, which indicates to the C program that the
1001 getservbyname() routine is available to look up services
1004 d_getsbyport (d_getsrvby.U):
1005 This variable conditionally defines the HAS_GETSERVBYPORT
1006 symbol, which indicates to the C program that the
1007 getservbyport() routine is available to look up services
1010 d_getsent (d_getsent.U):
1011 This variable conditionally defines HAS_GETSERVENT if getservent() is
1012 available to look up network services in some data base or another.
1014 d_getservbyname_r (d_getservbyname_r.U):
1015 This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,
1016 which indicates to the C program that the getservbyname_r()
1017 routine is available.
1019 d_getservbyport_r (d_getservbyport_r.U):
1020 This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,
1021 which indicates to the C program that the getservbyport_r()
1022 routine is available.
1024 d_getservent_r (d_getservent_r.U):
1025 This variable conditionally defines the HAS_GETSERVENT_R symbol,
1026 which indicates to the C program that the getservent_r()
1027 routine is available.
1029 d_getservprotos (d_getservprotos.U):
1030 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
1031 which indicates to the C program that <netdb.h> supplies
1032 prototypes for the various getserv*() functions.
1033 See also netdbtype.U for probing for various netdb types.
1035 d_getspnam (d_getspnam.U):
1036 This variable conditionally defines HAS_GETSPNAM if getspnam() is
1037 available to retrieve SysV shadow password entries by name.
1039 d_getspnam_r (d_getspnam_r.U):
1040 This variable conditionally defines the HAS_GETSPNAM_R symbol,
1041 which indicates to the C program that the getspnam_r()
1042 routine is available.
1044 d_gettimeod (d_ftime.U):
1045 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
1046 indicates that the gettimeofday() system call exists (to obtain a
1047 sub-second accuracy clock). You should probably include <sys/resource.h>.
1049 d_gmtime_r (d_gmtime_r.U):
1050 This variable conditionally defines the HAS_GMTIME_R symbol,
1051 which indicates to the C program that the gmtime_r()
1052 routine is available.
1054 d_gnulibc (d_gnulibc.U):
1055 Defined if we're dealing with the GNU C Library.
1057 d_grpasswd (i_grp.U):
1058 This variable conditionally defines GRPASSWD, which indicates
1059 that struct group in <grp.h> contains gr_passwd.
1061 d_hasmntopt (d_hasmntopt.U):
1062 This variable conditionally defines the HAS_HASMNTOPT symbol, which
1063 indicates to the C program that the hasmntopt() routine is available
1064 to query the mount options of file systems.
1066 d_htonl (d_htonl.U):
1067 This variable conditionally defines HAS_HTONL if htonl() and its
1068 friends are available to do network order byte swapping.
1070 d_index (d_strchr.U):
1071 This variable conditionally defines HAS_INDEX if index() and
1072 rindex() are available for string searching.
1074 d_inetaton (d_inetaton.U):
1075 This variable conditionally defines the HAS_INET_ATON symbol, which
1076 indicates to the C program that the inet_aton() function is available
1077 to parse IP address "dotted-quad" strings.
1079 d_int64_t (d_int64_t.U):
1080 This symbol will be defined if the C compiler supports int64_t.
1082 d_isascii (d_isascii.U):
1083 This variable conditionally defines the HAS_ISASCII constant,
1084 which indicates to the C program that isascii() is available.
1086 d_isfinite (d_isfinite.U):
1087 This variable conditionally defines the HAS_ISFINITE symbol, which
1088 indicates to the C program that the isfinite() routine is available.
1090 d_isinf (d_isinf.U):
1091 This variable conditionally defines the HAS_ISINF symbol, which
1092 indicates to the C program that the isinf() routine is available.
1094 d_isnan (d_isnan.U):
1095 This variable conditionally defines the HAS_ISNAN symbol, which
1096 indicates to the C program that the isnan() routine is available.
1098 d_isnanl (d_isnanl.U):
1099 This variable conditionally defines the HAS_ISNANL symbol, which
1100 indicates to the C program that the isnanl() routine is available.
1102 d_killpg (d_killpg.U):
1103 This variable conditionally defines the HAS_KILLPG symbol, which
1104 indicates to the C program that the killpg() routine is available
1105 to kill process groups.
1107 d_lchown (d_lchown.U):
1108 This variable conditionally defines the HAS_LCHOWN symbol, which
1109 indicates to the C program that the lchown() routine is available
1110 to operate on a symbolic link (instead of following the link).
1112 d_ldbl_dig (d_ldbl_dig.U):
1113 This variable conditionally defines d_ldbl_dig if this system's
1114 header files provide LDBL_DIG, which is the number of significant
1115 digits in a long double precision number.
1118 This variable conditionally defines HAS_LINK if link() is
1119 available to create hard links.
1121 d_localtime_r (d_localtime_r.U):
1122 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1123 which indicates to the C program that the localtime_r()
1124 routine is available.
1126 d_locconv (d_locconv.U):
1127 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1128 available for numeric and monetary formatting conventions.
1130 d_lockf (d_lockf.U):
1131 This variable conditionally defines HAS_LOCKF if lockf() is
1132 available to do file locking.
1134 d_longdbl (d_longdbl.U):
1135 This variable conditionally defines HAS_LONG_DOUBLE if
1136 the long double type is supported.
1138 d_longlong (d_longlong.U):
1139 This variable conditionally defines HAS_LONG_LONG if
1140 the long long type is supported.
1142 d_lseekproto (d_lseekproto.U):
1143 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1144 which indicates to the C program that the system provides
1145 a prototype for the lseek() function. Otherwise, it is
1146 up to the program to supply one.
1148 d_lstat (d_lstat.U):
1149 This variable conditionally defines HAS_LSTAT if lstat() is
1150 available to do file stats on symbolic links.
1152 d_madvise (d_madvise.U):
1153 This variable conditionally defines HAS_MADVISE if madvise() is
1154 available to map a file into memory.
1156 d_mblen (d_mblen.U):
1157 This variable conditionally defines the HAS_MBLEN symbol, which
1158 indicates to the C program that the mblen() routine is available
1159 to find the number of bytes in a multibye character.
1161 d_mbstowcs (d_mbstowcs.U):
1162 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1163 indicates to the C program that the mbstowcs() routine is available
1164 to convert a multibyte string into a wide character string.
1166 d_mbtowc (d_mbtowc.U):
1167 This variable conditionally defines the HAS_MBTOWC symbol, which
1168 indicates to the C program that the mbtowc() routine is available
1169 to convert multibyte to a wide character.
1171 d_memchr (d_memchr.U):
1172 This variable conditionally defines the HAS_MEMCHR symbol, which
1173 indicates to the C program that the memchr() routine is available
1174 to locate characters within a C string.
1176 d_memcmp (d_memcmp.U):
1177 This variable conditionally defines the HAS_MEMCMP symbol, which
1178 indicates to the C program that the memcmp() routine is available
1179 to compare blocks of memory.
1181 d_memcpy (d_memcpy.U):
1182 This variable conditionally defines the HAS_MEMCPY symbol, which
1183 indicates to the C program that the memcpy() routine is available
1184 to copy blocks of memory.
1186 d_memmove (d_memmove.U):
1187 This variable conditionally defines the HAS_MEMMOVE symbol, which
1188 indicates to the C program that the memmove() routine is available
1189 to copy potentatially overlapping blocks of memory.
1191 d_memset (d_memset.U):
1192 This variable conditionally defines the HAS_MEMSET symbol, which
1193 indicates to the C program that the memset() routine is available
1194 to set blocks of memory.
1196 d_mkdir (d_mkdir.U):
1197 This variable conditionally defines the HAS_MKDIR symbol, which
1198 indicates to the C program that the mkdir() routine is available
1199 to create directories..
1201 d_mkdtemp (d_mkdtemp.U):
1202 This variable conditionally defines the HAS_MKDTEMP symbol, which
1203 indicates to the C program that the mkdtemp() routine is available
1204 to exclusively create a uniquely named temporary directory.
1206 d_mkfifo (d_mkfifo.U):
1207 This variable conditionally defines the HAS_MKFIFO symbol, which
1208 indicates to the C program that the mkfifo() routine is available.
1210 d_mkstemp (d_mkstemp.U):
1211 This variable conditionally defines the HAS_MKSTEMP symbol, which
1212 indicates to the C program that the mkstemp() routine is available
1213 to exclusively create and open a uniquely named temporary file.
1215 d_mkstemps (d_mkstemps.U):
1216 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1217 indicates to the C program that the mkstemps() routine is available
1218 to exclusively create and open a uniquely named (with a suffix)
1221 d_mktime (d_mktime.U):
1222 This variable conditionally defines the HAS_MKTIME symbol, which
1223 indicates to the C program that the mktime() routine is available.
1226 This variable conditionally defines HAS_MMAP if mmap() is
1227 available to map a file into memory.
1229 d_modfl (d_modfl.U):
1230 This variable conditionally defines the HAS_MODFL symbol, which
1231 indicates to the C program that the modfl() routine is available.
1233 d_modfl_pow32_bug (d_modfl.U):
1234 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1235 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1236 For example from 4294967303.150000 one would get 4294967302.000000
1237 and 1.150000. The bug has been seen in certain versions of glibc,
1238 release 2.2.2 is known to be okay.
1240 d_mprotect (d_mprotect.U):
1241 This variable conditionally defines HAS_MPROTECT if mprotect() is
1242 available to modify the access protection of a memory mapped file.
1245 This variable conditionally defines the HAS_MSG symbol, which
1246 indicates that the entire msg*(2) library is present.
1248 d_msg_ctrunc (d_socket.U):
1249 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1250 which indicates that the MSG_CTRUNC is available. #ifdef is
1251 not enough because it may be an enum, glibc has been known to do this.
1253 d_msg_dontroute (d_socket.U):
1254 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1255 which indicates that the MSG_DONTROUTE is available. #ifdef is
1256 not enough because it may be an enum, glibc has been known to do this.
1258 d_msg_oob (d_socket.U):
1259 This variable conditionally defines the HAS_MSG_OOB symbol,
1260 which indicates that the MSG_OOB is available. #ifdef is
1261 not enough because it may be an enum, glibc has been known to do this.
1263 d_msg_peek (d_socket.U):
1264 This variable conditionally defines the HAS_MSG_PEEK symbol,
1265 which indicates that the MSG_PEEK is available. #ifdef is
1266 not enough because it may be an enum, glibc has been known to do this.
1268 d_msg_proxy (d_socket.U):
1269 This variable conditionally defines the HAS_MSG_PROXY symbol,
1270 which indicates that the MSG_PROXY is available. #ifdef is
1271 not enough because it may be an enum, glibc has been known to do this.
1273 d_msgctl (d_msgctl.U):
1274 This variable conditionally defines the HAS_MSGCTL symbol, which
1275 indicates to the C program that the msgctl() routine is available.
1277 d_msgget (d_msgget.U):
1278 This variable conditionally defines the HAS_MSGGET symbol, which
1279 indicates to the C program that the msgget() routine is available.
1281 d_msghdr_s (d_msghdr_s.U):
1282 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1283 which indicates that the struct msghdr is supported.
1285 d_msgrcv (d_msgrcv.U):
1286 This variable conditionally defines the HAS_MSGRCV symbol, which
1287 indicates to the C program that the msgrcv() routine is available.
1289 d_msgsnd (d_msgsnd.U):
1290 This variable conditionally defines the HAS_MSGSND symbol, which
1291 indicates to the C program that the msgsnd() routine is available.
1293 d_msync (d_msync.U):
1294 This variable conditionally defines HAS_MSYNC if msync() is
1295 available to synchronize a mapped file.
1297 d_munmap (d_munmap.U):
1298 This variable conditionally defines HAS_MUNMAP if munmap() is
1299 available to unmap a region mapped by mmap().
1301 d_mymalloc (mallocsrc.U):
1302 This variable conditionally defines MYMALLOC in case other parts
1303 of the source want to take special action if MYMALLOC is used.
1304 This may include different sorts of profiling or error detection.
1307 This variable conditionally defines the HAS_NICE symbol, which
1308 indicates to the C program that the nice() routine is available.
1310 d_nl_langinfo (d_nl_langinfo.U):
1311 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1312 indicates to the C program that the nl_langinfo() routine is available.
1314 d_nv_preserves_uv (perlxv.U):
1315 This variable indicates whether a variable of type nvtype
1316 can preserve all the bits a variable of type uvtype.
1318 d_off64_t (d_off64_t.U):
1319 This symbol will be defined if the C compiler supports off64_t.
1321 d_old_pthread_create_joinable (d_pthrattrj.U):
1322 This variable conditionally defines pthread_create_joinable.
1323 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1325 d_oldpthreads (usethreads.U):
1326 This variable conditionally defines the OLD_PTHREADS_API symbol,
1327 and indicates that Perl should be built to use the old
1328 draft POSIX threads API. This is only potentially meaningful if
1331 d_oldsock (d_socket.U):
1332 This variable conditionally defines the OLDSOCKET symbol, which
1333 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1335 d_open3 (d_open3.U):
1336 This variable conditionally defines the HAS_OPEN3 manifest constant,
1337 which indicates to the C program that the 3 argument version of
1338 the open(2) function is available.
1340 d_pathconf (d_pathconf.U):
1341 This variable conditionally defines the HAS_PATHCONF symbol, which
1342 indicates to the C program that the pathconf() routine is available
1343 to determine file-system related limits and options associated
1344 with a given filename.
1346 d_pause (d_pause.U):
1347 This variable conditionally defines the HAS_PAUSE symbol, which
1348 indicates to the C program that the pause() routine is available
1349 to suspend a process until a signal is received.
1351 d_perl_otherlibdirs (otherlibdirs.U):
1352 This variable conditionally defines PERL_OTHERLIBDIRS, which
1353 contains a colon-separated set of paths for the perl binary to
1354 include in @INC. See also otherlibdirs.
1356 d_phostname (d_gethname.U):
1357 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1358 contains the shell command which, when fed to popen(), may be
1359 used to derive the host name.
1362 This variable conditionally defines the HAS_PIPE symbol, which
1363 indicates to the C program that the pipe() routine is available
1364 to create an inter-process channel.
1367 This variable conditionally defines the HAS_POLL symbol, which
1368 indicates to the C program that the poll() routine is available
1369 to poll active file descriptors.
1371 d_portable (d_portable.U):
1372 This variable conditionally defines the PORTABLE symbol, which
1373 indicates to the C program that it should not assume that it is
1374 running on the machine it was compiled on.
1376 d_PRId64 (quadfio.U):
1377 This variable conditionally defines the PERL_PRId64 symbol, which
1378 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1380 d_PRIeldbl (longdblfio.U):
1381 This variable conditionally defines the PERL_PRIfldbl symbol, which
1382 indiciates that stdio has a symbol to print long doubles.
1384 d_PRIEUldbl (longdblfio.U):
1385 This variable conditionally defines the PERL_PRIfldbl symbol, which
1386 indiciates that stdio has a symbol to print long doubles.
1387 The 'U' in the name is to separate this from d_PRIeldbl so that even
1388 case-blind systems can see the difference.
1390 d_PRIfldbl (longdblfio.U):
1391 This variable conditionally defines the PERL_PRIfldbl symbol, which
1392 indiciates that stdio has a symbol to print long doubles.
1394 d_PRIFUldbl (longdblfio.U):
1395 This variable conditionally defines the PERL_PRIfldbl symbol, which
1396 indiciates that stdio has a symbol to print long doubles.
1397 The 'U' in the name is to separate this from d_PRIfldbl so that even
1398 case-blind systems can see the difference.
1400 d_PRIgldbl (longdblfio.U):
1401 This variable conditionally defines the PERL_PRIfldbl symbol, which
1402 indiciates that stdio has a symbol to print long doubles.
1404 d_PRIGUldbl (longdblfio.U):
1405 This variable conditionally defines the PERL_PRIfldbl symbol, which
1406 indiciates that stdio has a symbol to print long doubles.
1407 The 'U' in the name is to separate this from d_PRIgldbl so that even
1408 case-blind systems can see the difference.
1410 d_PRIi64 (quadfio.U):
1411 This variable conditionally defines the PERL_PRIi64 symbol, which
1412 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1414 d_PRIo64 (quadfio.U):
1415 This variable conditionally defines the PERL_PRIo64 symbol, which
1416 indiciates that stdio has a symbol to print 64-bit octal numbers.
1418 d_PRIu64 (quadfio.U):
1419 This variable conditionally defines the PERL_PRIu64 symbol, which
1420 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1423 d_PRIx64 (quadfio.U):
1424 This variable conditionally defines the PERL_PRIx64 symbol, which
1425 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1427 d_PRIXU64 (quadfio.U):
1428 This variable conditionally defines the PERL_PRIXU64 symbol, which
1429 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1430 The 'U' in the name is to separate this from d_PRIx64 so that even
1431 case-blind systems can see the difference.
1433 d_procselfexe (d_procselfexe.U):
1434 Defined if $procselfexe is symlink to the absolute
1435 pathname of the executing program.
1437 d_pthread_atfork (d_pthread_atfork.U):
1438 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1439 which indicates to the C program that the pthread_atfork()
1440 routine is available.
1442 d_pthread_yield (d_pthread_y.U):
1443 This variable conditionally defines the HAS_PTHREAD_YIELD
1444 symbol if the pthread_yield routine is available to yield
1445 the execution of the current thread.
1448 This variable conditionally defines PWAGE, which indicates
1449 that struct passwd contains pw_age.
1451 d_pwchange (i_pwd.U):
1452 This variable conditionally defines PWCHANGE, which indicates
1453 that struct passwd contains pw_change.
1455 d_pwclass (i_pwd.U):
1456 This variable conditionally defines PWCLASS, which indicates
1457 that struct passwd contains pw_class.
1459 d_pwcomment (i_pwd.U):
1460 This variable conditionally defines PWCOMMENT, which indicates
1461 that struct passwd contains pw_comment.
1463 d_pwexpire (i_pwd.U):
1464 This variable conditionally defines PWEXPIRE, which indicates
1465 that struct passwd contains pw_expire.
1467 d_pwgecos (i_pwd.U):
1468 This variable conditionally defines PWGECOS, which indicates
1469 that struct passwd contains pw_gecos.
1471 d_pwpasswd (i_pwd.U):
1472 This variable conditionally defines PWPASSWD, which indicates
1473 that struct passwd contains pw_passwd.
1475 d_pwquota (i_pwd.U):
1476 This variable conditionally defines PWQUOTA, which indicates
1477 that struct passwd contains pw_quota.
1479 d_qgcvt (d_qgcvt.U):
1480 This variable conditionally defines the HAS_QGCVT symbol, which
1481 indicates to the C program that the qgcvt() routine is available.
1483 d_quad (quadtype.U):
1484 This variable, if defined, tells that there's a 64-bit integer type,
1487 d_random_r (d_random_r.U):
1488 This variable conditionally defines the HAS_RANDOM_R symbol,
1489 which indicates to the C program that the random_r()
1490 routine is available.
1492 d_readdir64_r (d_readdir64_r.U):
1493 This variable conditionally defines the HAS_READDIR64_R symbol,
1494 which indicates to the C program that the readdir64_r()
1495 routine is available.
1497 d_readdir (d_readdir.U):
1498 This variable conditionally defines HAS_READDIR if readdir() is
1499 available to read directory entries.
1501 d_readdir_r (d_readdir_r.U):
1502 This variable conditionally defines the HAS_READDIR_R symbol,
1503 which indicates to the C program that the readdir_r()
1504 routine is available.
1506 d_readlink (d_readlink.U):
1507 This variable conditionally defines the HAS_READLINK symbol, which
1508 indicates to the C program that the readlink() routine is available
1509 to read the value of a symbolic link.
1511 d_readv (d_readv.U):
1512 This variable conditionally defines the HAS_READV symbol, which
1513 indicates to the C program that the readv() routine is available.
1515 d_recvmsg (d_recvmsg.U):
1516 This variable conditionally defines the HAS_RECVMSG symbol, which
1517 indicates to the C program that the recvmsg() routine is available.
1519 d_rename (d_rename.U):
1520 This variable conditionally defines the HAS_RENAME symbol, which
1521 indicates to the C program that the rename() routine is available
1524 d_rewinddir (d_readdir.U):
1525 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1528 d_rmdir (d_rmdir.U):
1529 This variable conditionally defines HAS_RMDIR if rmdir() is
1530 available to remove directories.
1532 d_safebcpy (d_safebcpy.U):
1533 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1534 the bcopy() routine can do overlapping copies. Normally, you
1535 should probably use memmove().
1537 d_safemcpy (d_safemcpy.U):
1538 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1539 the memcpy() routine can do overlapping copies.
1540 For overlapping copies, memmove() should be used, if available.
1542 d_sanemcmp (d_sanemcmp.U):
1543 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1544 the memcpy() routine is available and can be used to compare relative
1545 magnitudes of chars with their high bits set.
1547 d_sbrkproto (d_sbrkproto.U):
1548 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1549 which indicates to the C program that the system provides
1550 a prototype for the sbrk() function. Otherwise, it is
1551 up to the program to supply one.
1553 d_sched_yield (d_pthread_y.U):
1554 This variable conditionally defines the HAS_SCHED_YIELD
1555 symbol if the sched_yield routine is available to yield
1556 the execution of the current thread.
1558 d_scm_rights (d_socket.U):
1559 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1560 which indicates that the SCM_RIGHTS is available. #ifdef is
1561 not enough because it may be an enum, glibc has been known to do this.
1563 d_SCNfldbl (longdblfio.U):
1564 This variable conditionally defines the PERL_PRIfldbl symbol, which
1565 indiciates that stdio has a symbol to scan long doubles.
1567 d_seekdir (d_readdir.U):
1568 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1571 d_select (d_select.U):
1572 This variable conditionally defines HAS_SELECT if select() is
1573 available to select active file descriptors. A <sys/time.h>
1574 inclusion may be necessary for the timeout field.
1577 This variable conditionally defines the HAS_SEM symbol, which
1578 indicates that the entire sem*(2) library is present.
1580 d_semctl (d_semctl.U):
1581 This variable conditionally defines the HAS_SEMCTL symbol, which
1582 indicates to the C program that the semctl() routine is available.
1584 d_semctl_semid_ds (d_union_semun.U):
1585 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1586 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1588 d_semctl_semun (d_union_semun.U):
1589 This variable conditionally defines USE_SEMCTL_SEMUN, which
1590 indicates that union semun is to be used for semctl IPC_STAT.
1592 d_semget (d_semget.U):
1593 This variable conditionally defines the HAS_SEMGET symbol, which
1594 indicates to the C program that the semget() routine is available.
1596 d_semop (d_semop.U):
1597 This variable conditionally defines the HAS_SEMOP symbol, which
1598 indicates to the C program that the semop() routine is available.
1600 d_sendmsg (d_sendmsg.U):
1601 This variable conditionally defines the HAS_SENDMSG symbol, which
1602 indicates to the C program that the sendmsg() routine is available.
1604 d_setegid (d_setegid.U):
1605 This variable conditionally defines the HAS_SETEGID symbol, which
1606 indicates to the C program that the setegid() routine is available
1607 to change the effective gid of the current program.
1609 d_seteuid (d_seteuid.U):
1610 This variable conditionally defines the HAS_SETEUID symbol, which
1611 indicates to the C program that the seteuid() routine is available
1612 to change the effective uid of the current program.
1614 d_setgrent (d_setgrent.U):
1615 This variable conditionally defines the HAS_SETGRENT symbol, which
1616 indicates to the C program that the setgrent() routine is available
1617 for initializing sequential access to the group database.
1619 d_setgrent_r (d_setgrent_r.U):
1620 This variable conditionally defines the HAS_SETGRENT_R symbol,
1621 which indicates to the C program that the setgrent_r()
1622 routine is available.
1624 d_setgrps (d_setgrps.U):
1625 This variable conditionally defines the HAS_SETGROUPS symbol, which
1626 indicates to the C program that the setgroups() routine is available
1627 to set the list of process groups.
1629 d_sethent (d_sethent.U):
1630 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1633 d_sethostent_r (d_sethostent_r.U):
1634 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
1635 which indicates to the C program that the sethostent_r()
1636 routine is available.
1638 d_setitimer (d_setitimer.U):
1639 This variable conditionally defines the HAS_SETITIMER symbol, which
1640 indicates to the C program that the setitimer() routine is available.
1642 d_setlinebuf (d_setlnbuf.U):
1643 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1644 indicates to the C program that the setlinebuf() routine is available
1645 to change stderr or stdout from block-buffered or unbuffered to a
1648 d_setlocale (d_setlocale.U):
1649 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1650 available to handle locale-specific ctype implementations.
1652 d_setlocale_r (d_setlocale_r.U):
1653 This variable conditionally defines the HAS_SETLOCALE_R symbol,
1654 which indicates to the C program that the setlocale_r()
1655 routine is available.
1657 d_setnent (d_setnent.U):
1658 This variable conditionally defines HAS_SETNETENT if setnetent() is
1661 d_setnetent_r (d_setnetent_r.U):
1662 This variable conditionally defines the HAS_SETNETENT_R symbol,
1663 which indicates to the C program that the setnetent_r()
1664 routine is available.
1666 d_setpent (d_setpent.U):
1667 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1670 d_setpgid (d_setpgid.U):
1671 This variable conditionally defines the HAS_SETPGID symbol if the
1672 setpgid(pid, gpid) function is available to set process group ID.
1674 d_setpgrp2 (d_setpgrp2.U):
1675 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1676 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1677 is available to set the current process group.
1679 d_setpgrp (d_setpgrp.U):
1680 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1681 available to set the current process group.
1683 d_setprior (d_setprior.U):
1684 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1685 is available to set a process's priority.
1687 d_setproctitle (d_setproctitle.U):
1688 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1689 which indicates to the C program that the setproctitle() routine
1692 d_setprotoent_r (d_setprotoent_r.U):
1693 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
1694 which indicates to the C program that the setprotoent_r()
1695 routine is available.
1697 d_setpwent (d_setpwent.U):
1698 This variable conditionally defines the HAS_SETPWENT symbol, which
1699 indicates to the C program that the setpwent() routine is available
1700 for initializing sequential access to the passwd database.
1702 d_setpwent_r (d_setpwent_r.U):
1703 This variable conditionally defines the HAS_SETPWENT_R symbol,
1704 which indicates to the C program that the setpwent_r()
1705 routine is available.
1707 d_setregid (d_setregid.U):
1708 This variable conditionally defines HAS_SETREGID if setregid() is
1709 available to change the real and effective gid of the current
1712 d_setresgid (d_setregid.U):
1713 This variable conditionally defines HAS_SETRESGID if setresgid() is
1714 available to change the real, effective and saved gid of the current
1717 d_setresuid (d_setreuid.U):
1718 This variable conditionally defines HAS_SETREUID if setresuid() is
1719 available to change the real, effective and saved uid of the current
1722 d_setreuid (d_setreuid.U):
1723 This variable conditionally defines HAS_SETREUID if setreuid() is
1724 available to change the real and effective uid of the current
1727 d_setrgid (d_setrgid.U):
1728 This variable conditionally defines the HAS_SETRGID symbol, which
1729 indicates to the C program that the setrgid() routine is available
1730 to change the real gid of the current program.
1732 d_setruid (d_setruid.U):
1733 This variable conditionally defines the HAS_SETRUID symbol, which
1734 indicates to the C program that the setruid() routine is available
1735 to change the real uid of the current program.
1737 d_setsent (d_setsent.U):
1738 This variable conditionally defines HAS_SETSERVENT if setservent() is
1741 d_setservent_r (d_setservent_r.U):
1742 This variable conditionally defines the HAS_SETSERVENT_R symbol,
1743 which indicates to the C program that the setservent_r()
1744 routine is available.
1746 d_setsid (d_setsid.U):
1747 This variable conditionally defines HAS_SETSID if setsid() is
1748 available to set the process group ID.
1750 d_setvbuf (d_setvbuf.U):
1751 This variable conditionally defines the HAS_SETVBUF symbol, which
1752 indicates to the C program that the setvbuf() routine is available
1753 to change buffering on an open stdio stream.
1756 This variable conditionally defines the USE_SFIO symbol,
1757 and indicates whether sfio is available (and should be used).
1760 This variable conditionally defines the HAS_SHM symbol, which
1761 indicates that the entire shm*(2) library is present.
1763 d_shmat (d_shmat.U):
1764 This variable conditionally defines the HAS_SHMAT symbol, which
1765 indicates to the C program that the shmat() routine is available.
1767 d_shmatprototype (d_shmat.U):
1768 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1769 symbol, which indicates that sys/shm.h has a prototype for
1772 d_shmctl (d_shmctl.U):
1773 This variable conditionally defines the HAS_SHMCTL symbol, which
1774 indicates to the C program that the shmctl() routine is available.
1776 d_shmdt (d_shmdt.U):
1777 This variable conditionally defines the HAS_SHMDT symbol, which
1778 indicates to the C program that the shmdt() routine is available.
1780 d_shmget (d_shmget.U):
1781 This variable conditionally defines the HAS_SHMGET symbol, which
1782 indicates to the C program that the shmget() routine is available.
1784 d_sigaction (d_sigaction.U):
1785 This variable conditionally defines the HAS_SIGACTION symbol, which
1786 indicates that the Vr4 sigaction() routine is available.
1788 d_sigprocmask (d_sigprocmask.U):
1789 This variable conditionally defines HAS_SIGPROCMASK
1790 if sigprocmask() is available to examine or change the signal mask
1791 of the calling process.
1793 d_sigsetjmp (d_sigsetjmp.U):
1794 This variable conditionally defines the HAS_SIGSETJMP symbol,
1795 which indicates that the sigsetjmp() routine is available to
1796 call setjmp() and optionally save the process's signal mask.
1798 d_sockatmark (d_sockatmark.U):
1799 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1800 indicates to the C program that the sockatmark() routine is available.
1802 d_sockatmarkproto (d_sockatmarkproto.U):
1803 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1804 which indicates to the C program that the system provides
1805 a prototype for the sockatmark() function. Otherwise, it is
1806 up to the program to supply one.
1808 d_socket (d_socket.U):
1809 This variable conditionally defines HAS_SOCKET, which indicates
1810 that the BSD socket interface is supported.
1812 d_socklen_t (d_socklen_t.U):
1813 This symbol will be defined if the C compiler supports socklen_t.
1815 d_sockpair (d_socket.U):
1816 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1817 indicates that the BSD socketpair() is supported.
1819 d_socks5_init (d_socks5_init.U):
1820 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1821 indicates to the C program that the socks5_init() routine is available.
1823 d_sqrtl (d_sqrtl.U):
1824 This variable conditionally defines the HAS_SQRTL symbol, which
1825 indicates to the C program that the sqrtl() routine is available.
1827 d_srand48_r (d_srand48_r.U):
1828 This variable conditionally defines the HAS_SRAND48_R symbol,
1829 which indicates to the C program that the srand48_r()
1830 routine is available.
1832 d_srandom_r (d_srandom_r.U):
1833 This variable conditionally defines the HAS_SRANDOM_R symbol,
1834 which indicates to the C program that the srandom_r()
1835 routine is available.
1837 d_sresgproto (d_sresgproto.U):
1838 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
1839 which indicates to the C program that the system provides
1840 a prototype for the setresgid() function. Otherwise, it is
1841 up to the program to supply one.
1843 d_sresuproto (d_sresuproto.U):
1844 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
1845 which indicates to the C program that the system provides
1846 a prototype for the setresuid() function. Otherwise, it is
1847 up to the program to supply one.
1849 d_statblks (d_statblks.U):
1850 This variable conditionally defines USE_STAT_BLOCKS
1851 if this system has a stat structure declaring
1852 st_blksize and st_blocks.
1854 d_statfs_f_flags (d_statfs_f_flags.U):
1855 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1856 symbol, which indicates to struct statfs from has f_flags member.
1857 This kind of struct statfs is coming from sys/mount.h (BSD),
1858 not from sys/statfs.h (SYSV).
1860 d_statfs_s (d_statfs_s.U):
1861 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1862 which indicates that the struct statfs is supported.
1864 d_statvfs (d_statvfs.U):
1865 This variable conditionally defines the HAS_STATVFS symbol, which
1866 indicates to the C program that the statvfs() routine is available.
1868 d_stdio_cnt_lval (d_stdstdio.U):
1869 This variable conditionally defines STDIO_CNT_LVALUE if the
1870 FILE_cnt macro can be used as an lvalue.
1872 d_stdio_ptr_lval (d_stdstdio.U):
1873 This variable conditionally defines STDIO_PTR_LVALUE if the
1874 FILE_ptr macro can be used as an lvalue.
1876 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1877 This symbol is defined if using the FILE_ptr macro as an lvalue
1878 to increase the pointer by n leaves File_cnt(fp) unchanged.
1880 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1881 This symbol is defined if using the FILE_ptr macro as an lvalue
1882 to increase the pointer by n has the side effect of decreasing the
1883 value of File_cnt(fp) by n.
1885 d_stdio_stream_array (stdio_streams.U):
1886 This variable tells whether there is an array holding
1889 d_stdiobase (d_stdstdio.U):
1890 This variable conditionally defines USE_STDIO_BASE if this system
1891 has a FILE structure declaring a usable _base field (or equivalent)
1894 d_stdstdio (d_stdstdio.U):
1895 This variable conditionally defines USE_STDIO_PTR if this system
1896 has a FILE structure declaring usable _ptr and _cnt fields (or
1897 equivalent) in stdio.h.
1899 d_strchr (d_strchr.U):
1900 This variable conditionally defines HAS_STRCHR if strchr() and
1901 strrchr() are available for string searching.
1903 d_strcoll (d_strcoll.U):
1904 This variable conditionally defines HAS_STRCOLL if strcoll() is
1905 available to compare strings using collating information.
1907 d_strctcpy (d_strctcpy.U):
1908 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1909 indicates to the C program that this C compiler knows how to copy
1912 d_strerrm (d_strerror.U):
1913 This variable holds what Strerrr is defined as to translate an error
1914 code condition into an error message string. It could be 'strerror'
1915 or a more complex macro emulating strrror with sys_errlist[], or the
1916 "unknown" string when both strerror and sys_errlist are missing.
1918 d_strerror (d_strerror.U):
1919 This variable conditionally defines HAS_STRERROR if strerror() is
1920 available to translate error numbers to strings.
1922 d_strerror_r (d_strerror_r.U):
1923 This variable conditionally defines the HAS_STRERROR_R symbol,
1924 which indicates to the C program that the strerror_r()
1925 routine is available.
1927 d_strftime (d_strftime.U):
1928 This variable conditionally defines the HAS_STRFTIME symbol, which
1929 indicates to the C program that the strftime() routine is available.
1931 d_strtod (d_strtod.U):
1932 This variable conditionally defines the HAS_STRTOD symbol, which
1933 indicates to the C program that the strtod() routine is available
1934 to provide better numeric string conversion than atof().
1936 d_strtol (d_strtol.U):
1937 This variable conditionally defines the HAS_STRTOL symbol, which
1938 indicates to the C program that the strtol() routine is available
1939 to provide better numeric string conversion than atoi() and friends.
1941 d_strtold (d_strtold.U):
1942 This variable conditionally defines the HAS_STRTOLD symbol, which
1943 indicates to the C program that the strtold() routine is available.
1945 d_strtoll (d_strtoll.U):
1946 This variable conditionally defines the HAS_STRTOLL symbol, which
1947 indicates to the C program that the strtoll() routine is available.
1949 d_strtoq (d_strtoq.U):
1950 This variable conditionally defines the HAS_STRTOQ symbol, which
1951 indicates to the C program that the strtoq() routine is available.
1953 d_strtoul (d_strtoul.U):
1954 This variable conditionally defines the HAS_STRTOUL symbol, which
1955 indicates to the C program that the strtoul() routine is available
1956 to provide conversion of strings to unsigned long.
1958 d_strtoull (d_strtoull.U):
1959 This variable conditionally defines the HAS_STRTOULL symbol, which
1960 indicates to the C program that the strtoull() routine is available.
1962 d_strtouq (d_strtouq.U):
1963 This variable conditionally defines the HAS_STRTOUQ symbol, which
1964 indicates to the C program that the strtouq() routine is available.
1966 d_strxfrm (d_strxfrm.U):
1967 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1968 available to transform strings.
1970 d_suidsafe (d_dosuid.U):
1971 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1972 if setuid scripts can be secure. This test looks in /dev/fd/.
1974 d_symlink (d_symlink.U):
1975 This variable conditionally defines the HAS_SYMLINK symbol, which
1976 indicates to the C program that the symlink() routine is available
1977 to create symbolic links.
1979 d_syscall (d_syscall.U):
1980 This variable conditionally defines HAS_SYSCALL if syscall() is
1981 available call arbitrary system calls.
1983 d_syscallproto (d_syscallproto.U):
1984 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
1985 which indicates to the C program that the system provides
1986 a prototype for the syscall() function. Otherwise, it is
1987 up to the program to supply one.
1989 d_sysconf (d_sysconf.U):
1990 This variable conditionally defines the HAS_SYSCONF symbol, which
1991 indicates to the C program that the sysconf() routine is available
1992 to determine system related limits and options.
1994 d_sysernlst (d_strerror.U):
1995 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1996 is available to translate error numbers to the symbolic name.
1998 d_syserrlst (d_strerror.U):
1999 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
2000 available to translate error numbers to strings.
2002 d_system (d_system.U):
2003 This variable conditionally defines HAS_SYSTEM if system() is
2004 available to issue a shell command.
2006 d_tcgetpgrp (d_tcgtpgrp.U):
2007 This variable conditionally defines the HAS_TCGETPGRP symbol, which
2008 indicates to the C program that the tcgetpgrp() routine is available.
2009 to get foreground process group ID.
2011 d_tcsetpgrp (d_tcstpgrp.U):
2012 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2013 indicates to the C program that the tcsetpgrp() routine is available
2014 to set foreground process group ID.
2016 d_telldir (d_readdir.U):
2017 This variable conditionally defines HAS_TELLDIR if telldir() is
2020 d_telldirproto (d_telldirproto.U):
2021 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2022 which indicates to the C program that the system provides
2023 a prototype for the telldir() function. Otherwise, it is
2024 up to the program to supply one.
2027 This variable conditionally defines the HAS_TIME symbol, which indicates
2028 that the time() routine exists. The time() routine is normaly
2029 provided on UNIX systems.
2031 d_times (d_times.U):
2032 This variable conditionally defines the HAS_TIMES symbol, which indicates
2033 that the times() routine exists. The times() routine is normaly
2034 provided on UNIX systems. You may have to include <sys/times.h>.
2036 d_tm_tm_gmtoff (i_time.U):
2037 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2038 indicates to the C program that the struct tm has the tm_gmtoff field.
2040 d_tm_tm_zone (i_time.U):
2041 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2042 indicates to the C program that the struct tm has the tm_zone field.
2044 d_tmpnam_r (d_tmpnam_r.U):
2045 This variable conditionally defines the HAS_TMPNAM_R symbol,
2046 which indicates to the C program that the tmpnam_r()
2047 routine is available.
2049 d_truncate (d_truncate.U):
2050 This variable conditionally defines HAS_TRUNCATE if truncate() is
2051 available to truncate files.
2053 d_ttyname_r (d_ttyname_r.U):
2054 This variable conditionally defines the HAS_TTYNAME_R symbol,
2055 which indicates to the C program that the ttyname_r()
2056 routine is available.
2058 d_tzname (d_tzname.U):
2059 This variable conditionally defines HAS_TZNAME if tzname[] is
2060 available to access timezone names.
2062 d_u32align (d_u32align.U):
2063 This variable tells whether you must access character data
2064 through U32-aligned pointers.
2066 d_ualarm (d_ualarm.U):
2067 This variable conditionally defines the HAS_UALARM symbol, which
2068 indicates to the C program that the ualarm() routine is available.
2070 d_umask (d_umask.U):
2071 This variable conditionally defines the HAS_UMASK symbol, which
2072 indicates to the C program that the umask() routine is available.
2073 to set and get the value of the file creation mask.
2075 d_uname (d_gethname.U):
2076 This variable conditionally defines the HAS_UNAME symbol, which
2077 indicates to the C program that the uname() routine may be
2078 used to derive the host name.
2080 d_union_semun (d_union_semun.U):
2081 This variable conditionally defines HAS_UNION_SEMUN if the
2082 union semun is defined by including <sys/sem.h>.
2084 d_unordered (d_unordered.U):
2085 This variable conditionally defines the HAS_UNORDERED symbol, which
2086 indicates to the C program that the unordered() routine is available.
2088 d_usleep (d_usleep.U):
2089 This variable conditionally defines HAS_USLEEP if usleep() is
2090 available to do high granularity sleeps.
2092 d_usleepproto (d_usleepproto.U):
2093 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2094 which indicates to the C program that the system provides
2095 a prototype for the usleep() function. Otherwise, it is
2096 up to the program to supply one.
2098 d_ustat (d_ustat.U):
2099 This variable conditionally defines HAS_USTAT if ustat() is
2100 available to query file system statistics by dev_t.
2102 d_vendorarch (vendorarch.U):
2103 This variable conditionally defined PERL_VENDORARCH.
2105 d_vendorbin (vendorbin.U):
2106 This variable conditionally defines PERL_VENDORBIN.
2108 d_vendorlib (vendorlib.U):
2109 This variable conditionally defines PERL_VENDORLIB.
2111 d_vfork (d_vfork.U):
2112 This variable conditionally defines the HAS_VFORK symbol, which
2113 indicates the vfork() routine is available.
2115 d_void_closedir (d_closedir.U):
2116 This variable conditionally defines VOID_CLOSEDIR if closedir()
2117 does not return a value.
2119 d_voidsig (d_voidsig.U):
2120 This variable conditionally defines VOIDSIG if this system
2121 declares "void (*signal(...))()" in signal.h. The old way was to
2122 declare it as "int (*signal(...))()".
2124 d_voidtty (i_sysioctl.U):
2125 This variable conditionally defines USE_IOCNOTTY to indicate that the
2126 ioctl() call with TIOCNOTTY should be used to void tty association.
2127 Otherwise (on USG probably), it is enough to close the standard file
2128 decriptors and do a setpgrp().
2130 d_volatile (d_volatile.U):
2131 This variable conditionally defines the HASVOLATILE symbol, which
2132 indicates to the C program that this C compiler knows about the
2133 volatile declaration.
2135 d_vprintf (d_vprintf.U):
2136 This variable conditionally defines the HAS_VPRINTF symbol, which
2137 indicates to the C program that the vprintf() routine is available
2138 to printf with a pointer to an argument list.
2140 d_wait4 (d_wait4.U):
2141 This variable conditionally defines the HAS_WAIT4 symbol, which
2142 indicates the wait4() routine is available.
2144 d_waitpid (d_waitpid.U):
2145 This variable conditionally defines HAS_WAITPID if waitpid() is
2146 available to wait for child process.
2148 d_wcstombs (d_wcstombs.U):
2149 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2150 indicates to the C program that the wcstombs() routine is available
2151 to convert wide character strings to multibyte strings.
2153 d_wctomb (d_wctomb.U):
2154 This variable conditionally defines the HAS_WCTOMB symbol, which
2155 indicates to the C program that the wctomb() routine is available
2156 to convert a wide character to a multibyte.
2158 d_writev (d_writev.U):
2159 This variable conditionally defines the HAS_WRITEV symbol, which
2160 indicates to the C program that the writev() routine is available.
2163 This variable conditionally defines the symbol XENIX, which alerts
2164 the C program that it runs under Xenix.
2167 This variable is used internally by Configure to determine the
2168 full pathname (if any) of the date program. After Configure runs,
2169 the value is reset to a plain "date" and is not useful.
2171 db_hashtype (i_db.U):
2172 This variable contains the type of the hash structure element
2173 in the <db.h> header file. In older versions of DB, it was
2174 int, while in newer ones it is u_int32_t.
2176 db_prefixtype (i_db.U):
2177 This variable contains the type of the prefix structure element
2178 in the <db.h> header file. In older versions of DB, it was
2179 int, while in newer ones it is size_t.
2181 db_version_major (i_db.U):
2182 This variable contains the major version number of
2183 Berkeley DB found in the <db.h> header file.
2185 db_version_minor (i_db.U):
2186 This variable contains the minor version number of
2187 Berkeley DB found in the <db.h> header file.
2188 For DB version 1 this is always 0.
2190 db_version_patch (i_db.U):
2191 This variable contains the patch version number of
2192 Berkeley DB found in the <db.h> header file.
2193 For DB version 1 this is always 0.
2195 defvoidused (voidflags.U):
2196 This variable contains the default value of the VOIDUSED symbol (15).
2198 direntrytype (i_dirent.U):
2199 This symbol is set to 'struct direct' or 'struct dirent' depending on
2200 whether dirent is available or not. You should use this pseudo type to
2201 portably declare your directory entries.
2204 This variable contains the extension that is to be used for the
2205 dynamically loaded modules that perl generaties.
2208 This variable contains the name of the dynamic loading file that
2209 will be used with the package.
2211 doublesize (doublesize.U):
2212 This variable contains the value of the DOUBLESIZE symbol, which
2213 indicates to the C program how many bytes there are in a double.
2215 drand01 (randfunc.U):
2216 Indicates the macro to be used to generate normalized
2217 random numbers. Uses randfunc, often divided by
2218 (double) (((unsigned long) 1 << randbits)) in order to
2219 normalize the result.
2220 In C programs, the macro 'Drand01' is mapped to drand01.
2222 drand48_r_proto (d_drand48_r.U):
2223 This variable encodes the prototype of drand48_r.
2225 dynamic_ext (Extensions.U):
2226 This variable holds a list of XS extension files we want to
2227 link dynamically into the package. It is used by Makefile.
2229 eagain (nblock_io.U):
2230 This variable bears the symbolic errno code set by read() when no
2231 data is present on the file and non-blocking I/O was enabled (otherwise,
2232 read() blocks naturally).
2235 This variable conditionally defines EBCDIC if this
2236 system uses EBCDIC encoding. Among other things, this
2237 means that the character ranges are not contiguous.
2241 This variable is used internally by Configure to determine the
2242 full pathname (if any) of the echo program. After Configure runs,
2243 the value is reset to a plain "echo" and is not useful.
2246 This variable is used internally by Configure to determine the
2247 full pathname (if any) of the egrep program. After Configure runs,
2248 the value is reset to a plain "egrep" and is not useful.
2251 This variable is defined but not used by Configure.
2252 The value is a plain '' and is not useful.
2254 endgrent_r_proto (d_endgrent_r.U):
2255 This variable encodes the prototype of endgrent_r.
2257 endhostent_r_proto (d_endhostent_r.U):
2258 This variable encodes the prototype of endhostent_r.
2260 endnetent_r_proto (d_endnetent_r.U):
2261 This variable encodes the prototype of endnetent_r.
2263 endprotoent_r_proto (d_endprotoent_r.U):
2264 This variable encodes the prototype of endprotoent_r.
2266 endpwent_r_proto (d_endpwent_r.U):
2267 This variable encodes the prototype of endpwent_r.
2269 endservent_r_proto (d_endservent_r.U):
2270 This variable encodes the prototype of endservent_r.
2273 When running under Eunice this variable contains a command which will
2274 convert a shell script to the proper form of text file for it to be
2275 executable by the shell. On other systems it is a no-op.
2278 This is an old synonym for _exe.
2281 This variable is used internally by Configure to determine the
2282 full pathname (if any) of the expr program. After Configure runs,
2283 the value is reset to a plain "expr" and is not useful.
2285 extensions (Extensions.U):
2286 This variable holds a list of all extension files (both XS and
2287 non-xs linked into the package. It is propagated to Config.pm
2288 and is typically used to test whether a particular extesion
2292 This variable holds a list of extra modules to install.
2294 fflushall (fflushall.U):
2295 This symbol, if defined, tells that to flush
2296 all pending stdio output one must loop through all
2297 the stdio file handles stored in an array and fflush them.
2298 Note that if fflushNULL is defined, fflushall will not
2299 even be probed for and will be left undefined.
2301 fflushNULL (fflushall.U):
2302 This symbol, if defined, tells that fflush(NULL) does flush
2303 all pending stdio output.
2306 This variable is defined but not used by Configure.
2307 The value is a plain '' and is not useful.
2309 firstmakefile (Unix.U):
2310 This variable defines the first file searched by make. On unix,
2311 it is makefile (then Makefile). On case-insensitive systems,
2312 it might be something else. This is only used to deal with
2313 convoluted make depend tricks.
2316 This variable is defined but not used by Configure.
2317 The value is a plain '' and is not useful.
2319 fpossize (fpossize.U):
2320 This variable contains the size of a fpostype in bytes.
2322 fpostype (fpostype.U):
2323 This variable defines Fpos_t to be something like fpos_t, long,
2324 uint, or whatever type is used to declare file positions in libc.
2326 freetype (mallocsrc.U):
2327 This variable contains the return type of free(). It is usually
2328 void, but occasionally int.
2331 This variable contains the command used by Configure
2332 to copy files from the target host. Useful and available
2333 only during Perl build.
2334 The string ':' if not cross-compiling.
2337 This variable contains the full pathname to 'ar', whether or
2338 not the user has specified 'portability'. This is only used
2342 This variable contains the full pathname to 'csh', whether or
2343 not the user has specified 'portability'. This is only used
2344 in the compiled C program, and we assume that all systems which
2345 can share this executable will have the same full pathname to
2348 full_sed (Loc_sed.U):
2349 This variable contains the full pathname to 'sed', whether or
2350 not the user has specified 'portability'. This is only used
2351 in the compiled C program, and we assume that all systems which
2352 can share this executable will have the same full pathname to
2355 gccosandvers (gccvers.U):
2356 If GNU cc (gcc) is used, this variable the operating system and
2357 version used to compile the gcc. It is set to '' if not gcc,
2358 or if nothing useful can be parsed as the os version.
2360 gccversion (gccvers.U):
2361 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2362 indicate whether the compiler is version 1 or 2. This is used in
2363 setting some of the default cflags. It is set to '' if not gcc.
2365 getgrent_r_proto (d_getgrent_r.U):
2366 This variable encodes the prototype of getgrent_r.
2368 getgrgid_r_proto (d_getgrgid_r.U):
2369 This variable encodes the prototype of getgrgid_r.
2371 getgrnam_r_proto (d_getgrnam_r.U):
2372 This variable encodes the prototype of getgrnam_r.
2374 gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
2375 This variable encodes the prototype of gethostbyaddr_r.
2377 gethostbyname_r_proto (d_gethostbyname_r.U):
2378 This variable encodes the prototype of gethostbyname_r.
2380 gethostent_r_proto (d_gethostent_r.U):
2381 This variable encodes the prototype of gethostent_r.
2383 getlogin_r_proto (d_getlogin_r.U):
2384 This variable encodes the prototype of getlogin_r.
2386 getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
2387 This variable encodes the prototype of getnetbyaddr_r.
2389 getnetbyname_r_proto (d_getnetbyname_r.U):
2390 This variable encodes the prototype of getnetbyname_r.
2392 getnetent_r_proto (d_getnetent_r.U):
2393 This variable encodes the prototype of getnetent_r.
2395 getprotobyname_r_proto (d_getprotobyname_r.U):
2396 This variable encodes the prototype of getprotobyname_r.
2398 getprotobynumber_r_proto (d_getprotobynumber_r.U):
2399 This variable encodes the prototype of getprotobynumber_r.
2401 getprotoent_r_proto (d_getprotoent_r.U):
2402 This variable encodes the prototype of getprotoent_r.
2404 getpwent_r_proto (d_getpwent_r.U):
2405 This variable encodes the prototype of getpwent_r.
2407 getpwnam_r_proto (d_getpwnam_r.U):
2408 This variable encodes the prototype of getpwnam_r.
2410 getpwuid_r_proto (d_getpwuid_r.U):
2411 This variable encodes the prototype of getpwuid_r.
2413 getservbyname_r_proto (d_getservbyname_r.U):
2414 This variable encodes the prototype of getservbyname_r.
2416 getservbyport_r_proto (d_getservbyport_r.U):
2417 This variable encodes the prototype of getservbyport_r.
2419 getservent_r_proto (d_getservent_r.U):
2420 This variable encodes the prototype of getservent_r.
2422 getspnam_r_proto (d_getspnam_r.U):
2423 This variable encodes the prototype of getspnam_r.
2426 This variable contains the format string used for printing a Gid_t.
2428 gidsign (gidsign.U):
2429 This variable contains the signedness of a gidtype.
2430 1 for unsigned, -1 for signed.
2432 gidsize (gidsize.U):
2433 This variable contains the size of a gidtype in bytes.
2435 gidtype (gidtype.U):
2436 This variable defines Gid_t to be something like gid_t, int,
2437 ushort, or whatever type is used to declare the return type
2438 of getgid(). Typically, it is the type of group ids in the kernel.
2441 This variable holds the general path (space-separated) used to
2442 find libraries. It may contain directories that do not exist on
2443 this platform, libpth is the cleaned-up version.
2446 This variable is used internally by Configure to determine the
2447 full pathname (if any) of the gmake program. After Configure runs,
2448 the value is reset to a plain "gmake" and is not useful.
2450 gmtime_r_proto (d_gmtime_r.U):
2451 This variable encodes the prototype of gmtime_r.
2454 This variable is used internally by Configure to determine the
2455 full pathname (if any) of the grep program. After Configure runs,
2456 the value is reset to a plain "grep" and is not useful.
2459 This variable contains a command that produces the text of the
2460 /etc/group file. This is normally "cat /etc/group", but can be
2461 "ypcat group" when NIS is used.
2462 On some systems, such as os390, there may be no equivalent
2463 command, in which case this variable is unset.
2465 groupstype (groupstype.U):
2466 This variable defines Groups_t to be something like gid_t, int,
2467 ushort, or whatever type is used for the second argument to
2468 getgroups() and setgroups(). Usually, this is the same as
2469 gidtype (gid_t), but sometimes it isn't.
2472 This variable is used internally by Configure to determine the
2473 full pathname (if any) of the gzip program. After Configure runs,
2474 the value is reset to a plain "gzip" and is not useful.
2476 h_fcntl (h_fcntl.U):
2477 This is variable gets set in various places to tell i_fcntl that
2478 <fcntl.h> should be included.
2480 h_sysfile (h_sysfile.U):
2481 This is variable gets set in various places to tell i_sys_file that
2482 <sys/file.h> should be included.
2485 Gives the type of hints used for previous answers. May be one of
2486 "default", "recommended" or "previous".
2489 This variable contains a command that produces the text of the
2490 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2491 "ypcat hosts" when NIS is used.
2492 On some systems, such as os390, there may be no equivalent
2493 command, in which case this variable is unset.
2496 This variable is the size of an I16 in bytes.
2499 This variable contains the C type used for Perl's I16.
2502 This variable is the size of an I32 in bytes.
2505 This variable contains the C type used for Perl's I32.
2508 This variable is the size of an I64 in bytes.
2511 This variable contains the C type used for Perl's I64.
2514 This variable is the size of an I8 in bytes.
2517 This variable contains the C type used for Perl's I8.
2519 i_arpainet (i_arpainet.U):
2520 This variable conditionally defines the I_ARPA_INET symbol,
2521 and indicates whether a C program should include <arpa/inet.h>.
2523 i_bsdioctl (i_sysioctl.U):
2524 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2525 indicates to the C program that <sys/bsdioctl.h> exists and should
2528 i_crypt (i_crypt.U):
2529 This variable conditionally defines the I_CRYPT symbol, and indicates
2530 whether a C program should include <crypt.h>.
2533 This variable conditionally defines the I_DB symbol, and indicates
2534 whether a C program may include Berkeley's DB include file <db.h>.
2537 This variable conditionally defines the I_DBM symbol, which
2538 indicates to the C program that <dbm.h> exists and should
2541 i_dirent (i_dirent.U):
2542 This variable conditionally defines I_DIRENT, which indicates
2543 to the C program that it should include <dirent.h>.
2546 This variable conditionally defines the I_DLD symbol, which
2547 indicates to the C program that <dld.h> (GNU dynamic loading)
2548 exists and should be included.
2550 i_dlfcn (i_dlfcn.U):
2551 This variable conditionally defines the I_DLFCN symbol, which
2552 indicates to the C program that <dlfcn.h> exists and should
2555 i_fcntl (i_fcntl.U):
2556 This variable controls the value of I_FCNTL (which tells
2557 the C program to include <fcntl.h>).
2559 i_float (i_float.U):
2560 This variable conditionally defines the I_FLOAT symbol, and indicates
2561 whether a C program may include <float.h> to get symbols like DBL_MAX
2562 or DBL_MIN, i.e. machine dependent floating point values.
2565 This variable conditionally defines the I_FP symbol, and indicates
2566 whether a C program should include <fp.h>.
2568 i_fp_class (i_fp_class.U):
2569 This variable conditionally defines the I_FP_CLASS symbol, and indicates
2570 whether a C program should include <fp_class.h>.
2573 This variable conditionally defines the I_GDBM symbol, which
2574 indicates to the C program that <gdbm.h> exists and should
2578 This variable conditionally defines the I_GRP symbol, and indicates
2579 whether a C program should include <grp.h>.
2581 i_ieeefp (i_ieeefp.U):
2582 This variable conditionally defines the I_IEEEFP symbol, and indicates
2583 whether a C program should include <ieeefp.h>.
2585 i_inttypes (i_inttypes.U):
2586 This variable conditionally defines the I_INTTYPES symbol,
2587 and indicates whether a C program should include <inttypes.h>.
2589 i_langinfo (i_langinfo.U):
2590 This variable conditionally defines the I_LANGINFO symbol,
2591 and indicates whether a C program should include <langinfo.h>.
2593 i_libutil (i_libutil.U):
2594 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2595 whether a C program should include <libutil.h>.
2597 i_limits (i_limits.U):
2598 This variable conditionally defines the I_LIMITS symbol, and indicates
2599 whether a C program may include <limits.h> to get symbols like WORD_BIT
2602 i_locale (i_locale.U):
2603 This variable conditionally defines the I_LOCALE symbol,
2604 and indicates whether a C program should include <locale.h>.
2606 i_machcthr (i_machcthr.U):
2607 This variable conditionally defines the I_MACH_CTHREADS symbol,
2608 and indicates whether a C program should include <mach/cthreads.h>.
2610 i_malloc (i_malloc.U):
2611 This variable conditionally defines the I_MALLOC symbol, and indicates
2612 whether a C program should include <malloc.h>.
2615 This variable conditionally defines the I_MATH symbol, and indicates
2616 whether a C program may include <math.h>.
2618 i_memory (i_memory.U):
2619 This variable conditionally defines the I_MEMORY symbol, and indicates
2620 whether a C program should include <memory.h>.
2622 i_mntent (i_mntent.U):
2623 This variable conditionally defines the I_MNTENT symbol, and indicates
2624 whether a C program should include <mntent.h>.
2627 This variable conditionally defines the I_NDBM symbol, which
2628 indicates to the C program that <ndbm.h> exists and should
2631 i_netdb (i_netdb.U):
2632 This variable conditionally defines the I_NETDB symbol, and indicates
2633 whether a C program should include <netdb.h>.
2635 i_neterrno (i_neterrno.U):
2636 This variable conditionally defines the I_NET_ERRNO symbol, which
2637 indicates to the C program that <net/errno.h> exists and should
2640 i_netinettcp (i_netinettcp.U):
2641 This variable conditionally defines the I_NETINET_TCP symbol,
2642 and indicates whether a C program should include <netinet/tcp.h>.
2645 This variable conditionally defines I_NETINET_IN, which indicates
2646 to the C program that it should include <netinet/in.h>. Otherwise,
2647 you may try <sys/in.h>.
2650 This variable conditionally defines the I_POLL symbol, and indicates
2651 whether a C program should include <poll.h>.
2654 This variable conditionally defines the I_PROT symbol, and indicates
2655 whether a C program should include <prot.h>.
2657 i_pthread (i_pthread.U):
2658 This variable conditionally defines the I_PTHREAD symbol,
2659 and indicates whether a C program should include <pthread.h>.
2662 This variable conditionally defines I_PWD, which indicates
2663 to the C program that it should include <pwd.h>.
2665 i_rpcsvcdbm (i_dbm.U):
2666 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2667 indicates to the C program that <rpcsvc/dbm.h> exists and should
2668 be included. Some System V systems might need this instead of <dbm.h>.
2671 This variable conditionally defines the I_SFIO symbol,
2672 and indicates whether a C program should include <sfio.h>.
2674 i_sgtty (i_termio.U):
2675 This variable conditionally defines the I_SGTTY symbol, which
2676 indicates to the C program that it should include <sgtty.h> rather
2679 i_shadow (i_shadow.U):
2680 This variable conditionally defines the I_SHADOW symbol, and indicates
2681 whether a C program should include <shadow.h>.
2683 i_socks (i_socks.U):
2684 This variable conditionally defines the I_SOCKS symbol, and indicates
2685 whether a C program should include <socks.h>.
2687 i_stdarg (i_varhdr.U):
2688 This variable conditionally defines the I_STDARG symbol, which
2689 indicates to the C program that <stdarg.h> exists and should
2692 i_stddef (i_stddef.U):
2693 This variable conditionally defines the I_STDDEF symbol, which
2694 indicates to the C program that <stddef.h> exists and should
2697 i_stdlib (i_stdlib.U):
2698 This variable conditionally defines the I_STDLIB symbol, which
2699 indicates to the C program that <stdlib.h> exists and should
2702 i_string (i_string.U):
2703 This variable conditionally defines the I_STRING symbol, which
2704 indicates that <string.h> should be included rather than <strings.h>.
2706 i_sunmath (i_sunmath.U):
2707 This variable conditionally defines the I_SUNMATH symbol, and indicates
2708 whether a C program should include <sunmath.h>.
2710 i_sysaccess (i_sysaccess.U):
2711 This variable conditionally defines the I_SYS_ACCESS symbol,
2712 and indicates whether a C program should include <sys/access.h>.
2714 i_sysdir (i_sysdir.U):
2715 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2716 whether a C program should include <sys/dir.h>.
2718 i_sysfile (i_sysfile.U):
2719 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2720 whether a C program should include <sys/file.h> to get R_OK and friends.
2722 i_sysfilio (i_sysioctl.U):
2723 This variable conditionally defines the I_SYS_FILIO symbol, which
2724 indicates to the C program that <sys/filio.h> exists and should
2725 be included in preference to <sys/ioctl.h>.
2728 This variable conditionally defines I_SYS_IN, which indicates
2729 to the C program that it should include <sys/in.h> instead of
2732 i_sysioctl (i_sysioctl.U):
2733 This variable conditionally defines the I_SYS_IOCTL symbol, which
2734 indicates to the C program that <sys/ioctl.h> exists and should
2737 i_syslog (i_syslog.U):
2738 This variable conditionally defines the I_SYSLOG symbol,
2739 and indicates whether a C program should include <syslog.h>.
2741 i_sysmman (i_sysmman.U):
2742 This variable conditionally defines the I_SYS_MMAN symbol, and
2743 indicates whether a C program should include <sys/mman.h>.
2745 i_sysmode (i_sysmode.U):
2746 This variable conditionally defines the I_SYSMODE symbol,
2747 and indicates whether a C program should include <sys/mode.h>.
2749 i_sysmount (i_sysmount.U):
2750 This variable conditionally defines the I_SYSMOUNT symbol,
2751 and indicates whether a C program should include <sys/mount.h>.
2753 i_sysndir (i_sysndir.U):
2754 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2755 whether a C program should include <sys/ndir.h>.
2757 i_sysparam (i_sysparam.U):
2758 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2759 whether a C program should include <sys/param.h>.
2761 i_sysresrc (i_sysresrc.U):
2762 This variable conditionally defines the I_SYS_RESOURCE symbol,
2763 and indicates whether a C program should include <sys/resource.h>.
2765 i_syssecrt (i_syssecrt.U):
2766 This variable conditionally defines the I_SYS_SECURITY symbol,
2767 and indicates whether a C program should include <sys/security.h>.
2769 i_sysselct (i_sysselct.U):
2770 This variable conditionally defines I_SYS_SELECT, which indicates
2771 to the C program that it should include <sys/select.h> in order to
2772 get the definition of struct timeval.
2774 i_syssockio (i_sysioctl.U):
2775 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2776 C program that socket ioctl codes may be found in <sys/sockio.h>
2777 instead of <sys/ioctl.h>.
2779 i_sysstat (i_sysstat.U):
2780 This variable conditionally defines the I_SYS_STAT symbol,
2781 and indicates whether a C program should include <sys/stat.h>.
2783 i_sysstatfs (i_sysstatfs.U):
2784 This variable conditionally defines the I_SYSSTATFS symbol,
2785 and indicates whether a C program should include <sys/statfs.h>.
2787 i_sysstatvfs (i_sysstatvfs.U):
2788 This variable conditionally defines the I_SYSSTATVFS symbol,
2789 and indicates whether a C program should include <sys/statvfs.h>.
2791 i_systime (i_time.U):
2792 This variable conditionally defines I_SYS_TIME, which indicates
2793 to the C program that it should include <sys/time.h>.
2795 i_systimek (i_time.U):
2796 This variable conditionally defines I_SYS_TIME_KERNEL, which
2797 indicates to the C program that it should include <sys/time.h>
2798 with KERNEL defined.
2800 i_systimes (i_systimes.U):
2801 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2802 whether a C program should include <sys/times.h>.
2804 i_systypes (i_systypes.U):
2805 This variable conditionally defines the I_SYS_TYPES symbol,
2806 and indicates whether a C program should include <sys/types.h>.
2808 i_sysuio (i_sysuio.U):
2809 This variable conditionally defines the I_SYSUIO symbol, and indicates
2810 whether a C program should include <sys/uio.h>.
2812 i_sysun (i_sysun.U):
2813 This variable conditionally defines I_SYS_UN, which indicates
2814 to the C program that it should include <sys/un.h> to get UNIX
2815 domain socket definitions.
2817 i_sysutsname (i_sysutsname.U):
2818 This variable conditionally defines the I_SYSUTSNAME symbol,
2819 and indicates whether a C program should include <sys/utsname.h>.
2821 i_sysvfs (i_sysvfs.U):
2822 This variable conditionally defines the I_SYSVFS symbol,
2823 and indicates whether a C program should include <sys/vfs.h>.
2825 i_syswait (i_syswait.U):
2826 This variable conditionally defines I_SYS_WAIT, which indicates
2827 to the C program that it should include <sys/wait.h>.
2829 i_termio (i_termio.U):
2830 This variable conditionally defines the I_TERMIO symbol, which
2831 indicates to the C program that it should include <termio.h> rather
2834 i_termios (i_termio.U):
2835 This variable conditionally defines the I_TERMIOS symbol, which
2836 indicates to the C program that the POSIX <termios.h> file is
2840 This variable conditionally defines I_TIME, which indicates
2841 to the C program that it should include <time.h>.
2843 i_unistd (i_unistd.U):
2844 This variable conditionally defines the I_UNISTD symbol, and indicates
2845 whether a C program should include <unistd.h>.
2847 i_ustat (i_ustat.U):
2848 This variable conditionally defines the I_USTAT symbol, and indicates
2849 whether a C program should include <ustat.h>.
2851 i_utime (i_utime.U):
2852 This variable conditionally defines the I_UTIME symbol, and indicates
2853 whether a C program should include <utime.h>.
2855 i_values (i_values.U):
2856 This variable conditionally defines the I_VALUES symbol, and indicates
2857 whether a C program may include <values.h> to get symbols like MAXLONG
2860 i_varargs (i_varhdr.U):
2861 This variable conditionally defines I_VARARGS, which indicates
2862 to the C program that it should include <varargs.h>.
2864 i_varhdr (i_varhdr.U):
2865 Contains the name of the header to be included to get va_dcl definition.
2866 Typically one of varargs.h or stdarg.h.
2868 i_vfork (i_vfork.U):
2869 This variable conditionally defines the I_VFORK symbol, and indicates
2870 whether a C program should include vfork.h.
2872 ignore_versioned_solibs (libs.U):
2873 This variable should be non-empty if non-versioned shared
2874 libraries (libfoo.so.x.y) are to be ignored (because they
2875 cannot be linked against).
2877 inc_version_list (inc_version_list.U):
2878 This variable specifies the list of subdirectories in over
2879 which perl.c:incpush() and lib/lib.pm will automatically
2880 search when adding directories to @INC. The elements in
2881 the list are separated by spaces. This is only useful
2882 if you have a perl library directory tree structured like the
2883 default one. See INSTALL for how this works. The versioned
2884 site_perl directory was introduced in 5.005, so that is the
2885 lowest possible value.
2887 inc_version_list_init (inc_version_list.U):
2888 This variable holds the same list as inc_version_list, but
2889 each item is enclosed in double quotes and separated by commas,
2890 suitable for use in the PERL_INC_VERSION_LIST initialization.
2893 This variable must preceed the normal include path to get hte
2894 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2895 Value can be "" or "/bsd43" on mips.
2898 This variable is defined but not used by Configure.
2899 The value is a plain '' and is not useful.
2901 installarchlib (archlib.U):
2902 This variable is really the same as archlibexp but may differ on
2903 those systems using AFS. For extra portability, only this variable
2904 should be used in makefiles.
2907 This variable is the same as binexp unless AFS is running in which case
2908 the user is explicitely prompted for it. This variable should always
2909 be used in your makefiles for maximum portability.
2911 installman1dir (man1dir.U):
2912 This variable is really the same as man1direxp, unless you are using
2913 AFS in which case it points to the read/write location whereas
2914 man1direxp only points to the read-only access location. For extra
2915 portability, you should only use this variable within your makefiles.
2917 installman3dir (man3dir.U):
2918 This variable is really the same as man3direxp, unless you are using
2919 AFS in which case it points to the read/write location whereas
2920 man3direxp only points to the read-only access location. For extra
2921 portability, you should only use this variable within your makefiles.
2923 installprefix (installprefix.U):
2924 This variable holds the name of the directory below which
2925 "make install" will install the package. For most users, this
2926 is the same as prefix. However, it is useful for
2927 installing the software into a different (usually temporary)
2928 location after which it can be bundled up and moved somehow
2929 to the final location specified by prefix.
2931 installprefixexp (installprefix.U):
2932 This variable holds the full absolute path of installprefix
2933 with all ~-expansion done.
2935 installprivlib (privlib.U):
2936 This variable is really the same as privlibexp but may differ on
2937 those systems using AFS. For extra portability, only this variable
2938 should be used in makefiles.
2940 installscript (scriptdir.U):
2941 This variable is usually the same as scriptdirexp, unless you are on
2942 a system running AFS, in which case they may differ slightly. You
2943 should always use this variable within your makefiles for portability.
2945 installsitearch (sitearch.U):
2946 This variable is really the same as sitearchexp but may differ on
2947 those systems using AFS. For extra portability, only this variable
2948 should be used in makefiles.
2950 installsitebin (sitebin.U):
2951 This variable is usually the same as sitebinexp, unless you are on
2952 a system running AFS, in which case they may differ slightly. You
2953 should always use this variable within your makefiles for portability.
2955 installsitelib (sitelib.U):
2956 This variable is really the same as sitelibexp but may differ on
2957 those systems using AFS. For extra portability, only this variable
2958 should be used in makefiles.
2960 installstyle (installstyle.U):
2961 This variable describes the "style" of the perl installation.
2962 This is intended to be useful for tools that need to
2963 manipulate entire perl distributions. Perl itself doesn't use
2964 this to find its libraries -- the library directories are
2965 stored directly in Config.pm. Currently, there are only two
2966 styles: "lib" and "lib/perl5". The default library locations
2967 (e.g. privlib, sitelib) are either $prefix/lib or
2968 $prefix/lib/perl5. The former is useful if $prefix is a
2969 directory dedicated to perl (e.g. /opt/perl), while the latter
2970 is useful if $prefix is shared by many packages, e.g. if
2972 This may later be extended to include other information, so
2973 be careful with pattern-matching on the results.
2974 For compatibility with perl5.005 and earlier, the default
2975 setting is based on whether or not $prefix contains the string
2978 installusrbinperl (instubperl.U):
2979 This variable tells whether Perl should be installed also as
2980 /usr/bin/perl in addition to
2983 installvendorarch (vendorarch.U):
2984 This variable is really the same as vendorarchexp but may differ on
2985 those systems using AFS. For extra portability, only this variable
2986 should be used in makefiles.
2988 installvendorbin (vendorbin.U):
2989 This variable is really the same as vendorbinexp but may differ on
2990 those systems using AFS. For extra portability, only this variable
2991 should be used in makefiles.
2993 installvendorlib (vendorlib.U):
2994 This variable is really the same as vendorlibexp but may differ on
2995 those systems using AFS. For extra portability, only this variable
2996 should be used in makefiles.
2998 intsize (intsize.U):
2999 This variable contains the value of the INTSIZE symbol, which
3000 indicates to the C program how many bytes there are in an int.
3002 issymlink (issymlink.U):
3003 This variable holds the test command to test for a symbolic link
3004 (if they are supported). Typical values include 'test -h' and
3007 ivdformat (perlxvf.U):
3008 This variable contains the format string used for printing
3009 a Perl IV as a signed decimal integer.
3012 This variable is the size of an IV in bytes.
3015 This variable contains the C type used for Perl's IV.
3017 known_extensions (Extensions.U):
3018 This variable holds a list of all XS extensions included in
3022 This variable is defined but not used by Configure.
3023 The value is a plain '' and is not useful.
3026 This variable indicates the program to be used to link
3027 libraries for dynamic loading. On some systems, it is 'ld'.
3028 On ELF systems, it should be $cc. Mostly, we'll try to respect
3029 the hint file setting.
3031 lddlflags (dlsrc.U):
3032 This variable contains any special flags that might need to be
3033 passed to $ld to create a shared library suitable for dynamic
3034 loading. It is up to the makefile to use it. For hpux, it
3035 should be '-b'. For sunos 4.1, it is empty.
3037 ldflags (ccflags.U):
3038 This variable contains any additional C loader flags desired by
3039 the user. It is up to the Makefile to use this.
3041 ldflags_uselargefiles (uselfs.U):
3042 This variable contains the loader flags needed by large file builds
3043 and added to ldflags by hints files.
3045 ldlibpthname (libperl.U):
3046 This variable holds the name of the shared library
3047 search path, often LD_LIBRARY_PATH. To get an empty
3048 string, the hints file must set this to 'none'.
3051 This variable is used internally by Configure to determine the
3052 full pathname (if any) of the less program. After Configure runs,
3053 the value is reset to a plain "less" and is not useful.
3056 This is an old synonym for _a.
3059 This variable contains the location of the C library.
3061 libperl (libperl.U):
3062 The perl executable is obtained by linking perlmain.c with
3063 libperl, any static extensions (usually just DynaLoader),
3064 and any other libraries needed on this system. libperl
3065 is usually libperl.a, but can also be libperl.so.xxx if
3066 the user wishes to build a perl executable with a shared
3070 This variable holds the general path (space-separated) used to find
3071 libraries. It is intended to be used by other units.
3074 This variable holds the additional libraries we want to use.
3075 It is up to the Makefile to deal with it.
3078 This variable holds the directory names aka dirnames of the libraries
3079 we found and accepted, duplicates are removed.
3082 This variable holds the filenames aka basenames of the libraries
3083 we found and accepted.
3086 This variable holds the full pathnames of the libraries
3087 we found and accepted.
3090 This variable holds the directory names probed for libraries.
3092 libswanted (Myinit.U):
3093 This variable holds a list of all the libraries we want to
3094 search. The order is chosen to pick up the c library
3095 ahead of ucb or bsd libraries for SVR4.
3097 libswanted_uselargefiles (uselfs.U):
3098 This variable contains the libraries needed by large file builds
3099 and added to ldflags by hints files. It is a space separated list
3100 of the library names without the "lib" prefix or any suffix, just
3104 This variable is defined but not used by Configure.
3105 The value is a plain '' and is not useful.
3108 This variable is defined but not used by Configure.
3109 The value is a plain '' and is not useful.
3111 lkflags (ccflags.U):
3112 This variable contains any additional C partial linker flags desired by
3113 the user. It is up to the Makefile to use this.
3116 This variable is used internally by Configure to determine the
3117 full pathname (if any) of the ln program. After Configure runs,
3118 the value is reset to a plain "ln" and is not useful.
3121 This variable holds the name of the command to make
3122 symbolic links (if they are supported). It can be used
3123 in the Makefile. It is either 'ln -s' or 'ln'
3125 localtime_r_proto (d_localtime_r.U):
3126 This variable encodes the prototype of localtime_r.
3128 locincpth (ccflags.U):
3129 This variable contains a list of additional directories to be
3130 searched by the compiler. The appropriate '-I' directives will
3131 be added to ccflags. This is intended to simplify setting
3132 local directories from the Configure command line.
3133 It's not much, but it parallels the loclibpth stuff in libpth.U.
3135 loclibpth (libpth.U):
3136 This variable holds the paths (space-separated) used to find local
3137 libraries. It is prepended to libpth, and is intended to be easily
3138 set from the command line.
3140 longdblsize (d_longdbl.U):
3141 This variable contains the value of the LONG_DOUBLESIZE symbol, which
3142 indicates to the C program how many bytes there are in a long double,
3143 if this system supports long doubles.
3145 longlongsize (d_longlong.U):
3146 This variable contains the value of the LONGLONGSIZE symbol, which
3147 indicates to the C program how many bytes there are in a long long,
3148 if this system supports long long.
3150 longsize (intsize.U):
3151 This variable contains the value of the LONGSIZE symbol, which
3152 indicates to the C program how many bytes there are in a long.
3155 This variable is defined but not used by Configure.
3156 The value is a plain '' and is not useful.
3159 This variable is defined but not used by Configure.
3160 The value is a plain '' and is not useful.
3163 This variable is used internally by Configure to determine the
3164 full pathname (if any) of the ls program. After Configure runs,
3165 the value is reset to a plain "ls" and is not useful.
3167 lseeksize (lseektype.U):
3168 This variable defines lseektype to be something like off_t, long,
3169 or whatever type is used to declare lseek offset's type in the
3170 kernel (which also appears to be lseek's return type).
3172 lseektype (lseektype.U):
3173 This variable defines lseektype to be something like off_t, long,
3174 or whatever type is used to declare lseek offset's type in the
3175 kernel (which also appears to be lseek's return type).
3178 This variable is defined but not used by Configure.
3179 The value is a plain '' and is not useful.
3182 This variable is defined but not used by Configure.
3183 The value is a plain '' and is not useful.
3186 This variable is used internally by Configure to determine the
3187 full pathname (if any) of the make program. After Configure runs,
3188 the value is reset to a plain "make" and is not useful.
3190 make_set_make (make.U):
3191 Some versions of 'make' set the variable MAKE. Others do not.
3192 This variable contains the string to be included in Makefile.SH
3193 so that MAKE is set if needed, and not if not needed.
3194 Possible values are:
3195 make_set_make='#' # If your make program handles this for you,
3196 make_set_make="MAKE=$make" # if it doesn't.
3197 I used a comment character so that we can distinguish a
3198 'set' value (from a previous config.sh or Configure '-D' option)
3199 from an uncomputed value.
3201 mallocobj (mallocsrc.U):
3202 This variable contains the name of the malloc.o that this package
3203 generates, if that malloc.o is preferred over the system malloc.
3204 Otherwise the value is null. This variable is intended for generating
3205 Makefiles. See mallocsrc.
3207 mallocsrc (mallocsrc.U):
3208 This variable contains the name of the malloc.c that comes with
3209 the package, if that malloc.c is preferred over the system malloc.
3210 Otherwise the value is null. This variable is intended for generating
3213 malloctype (mallocsrc.U):
3214 This variable contains the kind of ptr returned by malloc and realloc.
3216 man1dir (man1dir.U):
3217 This variable contains the name of the directory in which manual
3218 source pages are to be put. It is the responsibility of the
3219 Makefile.SH to get the value of this into the proper command.
3220 You must be prepared to do the ~name expansion yourself.
3222 man1direxp (man1dir.U):
3223 This variable is the same as the man1dir variable, but is filename
3224 expanded at configuration time, for convenient use in makefiles.
3226 man1ext (man1dir.U):
3227 This variable contains the extension that the manual page should
3228 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
3231 man3dir (man3dir.U):
3232 This variable contains the name of the directory in which manual
3233 source pages are to be put. It is the responsibility of the
3234 Makefile.SH to get the value of this into the proper command.
3235 You must be prepared to do the ~name expansion yourself.
3237 man3direxp (man3dir.U):
3238 This variable is the same as the man3dir variable, but is filename
3239 expanded at configuration time, for convenient use in makefiles.
3241 man3ext (man3dir.U):
3242 This variable contains the extension that the manual page should
3243 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
3247 This variable is used internally by Configure to determine the
3248 full pathname (if any) of the Mcc program. After Configure runs,
3249 the value is reset to a plain "Mcc" and is not useful.
3251 mips_type (usrinc.U):
3252 This variable holds the environment type for the mips system.
3253 Possible values are "BSD 4.3" and "System V".
3256 This variable is used internally by Configure to determine the
3257 full pathname (if any) of the mkdir program. After Configure runs,
3258 the value is reset to a plain "mkdir" and is not useful.
3260 mmaptype (d_mmap.U):
3261 This symbol contains the type of pointer returned by mmap()
3262 (and simultaneously the type of the first argument).
3263 It can be 'void *' or 'caddr_t'.
3265 modetype (modetype.U):
3266 This variable defines modetype to be something like mode_t,
3267 int, unsigned short, or whatever type is used to declare file
3268 modes for system calls.
3271 This variable is used internally by Configure to determine the
3272 full pathname (if any) of the more program. After Configure runs,
3273 the value is reset to a plain "more" and is not useful.
3275 multiarch (multiarch.U):
3276 This variable conditionally defines the MULTIARCH symbol
3277 which signifies the presence of multiplatform files.
3278 This is normally set by hints files.
3281 This variable is defined but not used by Configure.
3282 The value is a plain '' and is not useful.
3284 myarchname (archname.U):
3285 This variable holds the architecture name computed by Configure in
3286 a previous run. It is not intended to be perused by any user and
3287 should never be set in a hint file.
3289 mydomain (myhostname.U):
3290 This variable contains the eventual value of the MYDOMAIN symbol,
3291 which is the domain of the host the program is going to run on.
3292 The domain must be appended to myhostname to form a complete host name.
3293 The dot comes with mydomain, and need not be supplied by the program.
3295 myhostname (myhostname.U):
3296 This variable contains the eventual value of the MYHOSTNAME symbol,
3297 which is the name of the host the program is going to run on.
3298 The domain is not kept with hostname, but must be gotten from mydomain.
3299 The dot comes with mydomain, and need not be supplied by the program.
3301 myuname (Oldconfig.U):
3302 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
3303 pseudo variables assignments in the output are stripped, thank you. The
3304 whole thing is then lower-cased.
3307 This variable contains the '-n' flag if that is what causes the echo
3308 command to suppress newline. Otherwise it is null. Correct usage is
3309 $echo $n "prompt for a question: $c".
3311 need_va_copy (need_va_copy.U):
3312 This symbol, if defined, indicates that the system stores
3313 the variable argument list datatype, va_list, in a format
3314 that cannot be copied by simple assignment, so that some
3315 other means must be used when copying is required.
3316 As such systems vary in their provision (or non-provision)
3317 of copying mechanisms, handy.h defines a platform-
3318 independent macro, Perl_va_copy(src, dst), to do the job.
3320 netdb_hlen_type (netdbtype.U):
3321 This variable holds the type used for the 2nd argument to
3322 gethostbyaddr(). Usually, this is int or size_t or unsigned.
3323 This is only useful if you have gethostbyaddr(), naturally.
3325 netdb_host_type (netdbtype.U):
3326 This variable holds the type used for the 1st argument to
3327 gethostbyaddr(). Usually, this is char * or void *, possibly
3328 with or without a const prefix.
3329 This is only useful if you have gethostbyaddr(), naturally.
3331 netdb_name_type (netdbtype.U):
3332 This variable holds the type used for the argument to
3333 gethostbyname(). Usually, this is char * or const char *.
3334 This is only useful if you have gethostbyname(), naturally.
3336 netdb_net_type (netdbtype.U):
3337 This variable holds the type used for the 1st argument to
3338 getnetbyaddr(). Usually, this is int or long.
3339 This is only useful if you have getnetbyaddr(), naturally.
3342 This variable is used internally by Configure to determine the
3343 full pathname (if any) of the nm program. After Configure runs,
3344 the value is reset to a plain "nm" and is not useful.
3347 This variable holds the options that may be necessary for nm.
3349 nm_so_opt (usenm.U):
3350 This variable holds the options that may be necessary for nm
3351 to work on a shared library but that can not be used on an
3352 archive library. Currently, this is only used by Linux, where
3353 nm --dynamic is *required* to get symbols from an ELF library which
3354 has been stripped, but nm --dynamic is *fatal* on an archive library.
3355 Maybe Linux should just always set usenm=false.
3357 nonxs_ext (Extensions.U):
3358 This variable holds a list of all non-xs extensions included
3359 in the package. All of them will be built.
3362 This variable is used internally by Configure to determine the
3363 full pathname (if any) of the nroff program. After Configure runs,
3364 the value is reset to a plain "nroff" and is not useful.
3366 nv_preserves_uv_bits (perlxv.U):
3367 This variable indicates how many of bits type uvtype
3368 a variable nvtype can preserve.
3370 nveformat (perlxvf.U):
3371 This variable contains the format string used for printing
3372 a Perl NV using %e-ish floating point format.
3374 nvEUformat (perlxvf.U):
3375 This variable contains the format string used for printing
3376 a Perl NV using %E-ish floating point format.
3378 nvfformat (perlxvf.U):
3379 This variable confains the format string used for printing
3380 a Perl NV using %f-ish floating point format.
3382 nvFUformat (perlxvf.U):
3383 This variable confains the format string used for printing
3384 a Perl NV using %F-ish floating point format.
3386 nvgformat (perlxvf.U):
3387 This variable contains the format string used for printing
3388 a Perl NV using %g-ish floating point format.
3390 nvGUformat (perlxvf.U):
3391 This variable contains the format string used for printing
3392 a Perl NV using %G-ish floating point format.
3395 This variable is the size of an NV in bytes.
3398 This variable contains the C type used for Perl's NV.
3400 o_nonblock (nblock_io.U):
3401 This variable bears the symbol value to be used during open() or fcntl()
3402 to turn on non-blocking I/O for a file descriptor. If you wish to switch
3403 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
3404 but that is only supported by some devices.
3407 This is an old synonym for _o.
3409 old_pthread_create_joinable (d_pthrattrj.U):
3410 This variable defines the constant to use for creating joinable
3411 (aka undetached) pthreads. Unused if pthread.h defines
3412 PTHREAD_CREATE_JOINABLE. If used, possible values are
3413 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
3415 optimize (ccflags.U):
3416 This variable contains any optimizer/debugger flag that should be used.
3417 It is up to the Makefile to use it.
3419 orderlib (orderlib.U):
3420 This variable is "true" if the components of libraries must be ordered
3421 (with `lorder $* | tsort`) before placing them in an archive. Set to
3422 "false" if ranlib or ar can generate random libraries.
3424 osname (Oldconfig.U):
3425 This variable contains the operating system name (e.g. sunos,
3426 solaris, hpux, etc.). It can be useful later on for setting
3427 defaults. Any spaces are replaced with underscores. It is set
3428 to a null string if we can't figure it out.
3430 osvers (Oldconfig.U):
3431 This variable contains the operating system version (e.g.
3432 4.1.3, 5.2, etc.). It is primarily used for helping select
3433 an appropriate hints file, but might be useful elsewhere for
3434 setting defaults. It is set to '' if we can't figure it out.
3435 We try to be flexible about how much of the version number
3436 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3437 same for this package, hints files might just be os_4.0 or
3438 os_4.1, etc., not keeping separate files for each little release.
3440 otherlibdirs (otherlibdirs.U):
3441 This variable contains a colon-separated set of paths for the perl
3442 binary to search for additional library files or modules.
3443 These directories will be tacked to the end of @INC.
3444 Perl will automatically search below each path for version-
3445 and architecture-specific directories. See inc_version_list
3447 A value of ' ' means 'none' and is used to preserve this value
3448 for the next run through Configure.
3450 package (package.U):
3451 This variable contains the name of the package being constructed.
3452 It is primarily intended for the use of later Configure units.
3455 This variable contains the name of the preferred pager on the system.
3456 Usual values are (the full pathnames of) more, less, pg, or cat.
3459 This variable contains a command that produces the text of the
3460 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3461 "ypcat passwd" when NIS is used.
3462 On some systems, such as os390, there may be no equivalent
3463 command, in which case this variable is unset.
3465 patchlevel (patchlevel.U):
3466 The patchlevel level of this package.
3467 The value of patchlevel comes from the patchlevel.h file.
3468 In a version number such as 5.6.1, this is the "6".
3469 In patchlevel.h, this is referred to as "PERL_VERSION".
3472 This is an old synonym for p_ in Head.U, the character
3473 used to separate elements in the command shell search PATH.
3476 This variable contains the full path (if any) to a previously
3477 installed perl5.005 or later suitable for running the script
3478 to determine inc_version_list.
3481 This variable is defined but not used by Configure.
3482 The value is a plain '' and is not useful.
3484 perl_patchlevel (patchlevel.U):
3485 This is the Perl patch level, a numeric change identifier,
3486 as defined by whichever source code maintenance system
3487 is used to maintain the patches; currently Perforce.
3488 It does not correlate with the Perl version numbers or
3489 the maintenance versus development dichotomy except
3490 by also being increasing.
3492 PERL_REVISION (Oldsyms.U):
3493 In a Perl version number such as 5.6.2, this is the 5.
3494 This value is manually set in patchlevel.h
3496 PERL_SUBVERSION (Oldsyms.U):
3497 In a Perl version number such as 5.6.2, this is the 2.
3498 Values greater than 50 represent potentially unstable
3499 development subversions.
3500 This value is manually set in patchlevel.h
3502 PERL_VERSION (Oldsyms.U):
3503 In a Perl version number such as 5.6.2, this is the 6.
3504 This value is manually set in patchlevel.h
3506 perladmin (perladmin.U):
3507 Electronic mail address of the perl5 administrator.
3510 The list of libraries needed by Perl only (any libraries needed
3511 by extensions only will by dropped, if using dynamic loading).
3513 perlpath (perlpath.U):
3514 This variable contains the eventual value of the PERLPATH symbol,
3515 which contains the name of the perl interpreter to be used in
3516 shell scripts and in the "eval 'exec'" idiom.
3519 This variable is used internally by Configure to determine the
3520 full pathname (if any) of the pg program. After Configure runs,
3521 the value is reset to a plain "pg" and is not useful.
3523 phostname (myhostname.U):
3524 This variable contains the eventual value of the PHOSTNAME symbol,
3525 which is a command that can be fed to popen() to get the host name.
3526 The program should probably not presume that the domain is or isn't
3529 pidtype (pidtype.U):
3530 This variable defines PIDTYPE to be something like pid_t, int,
3531 ushort, or whatever type is used to declare process ids in the kernel.
3534 Holds the private path used by Configure to find out the libraries.
3535 Its value is prepend to libpth. This variable takes care of special
3536 machines, like the mips. Usually, it should be empty.
3538 pm_apiversion (xs_apiversion.U):
3539 This variable contains the version of the oldest perl
3540 compatible with the present perl. (That is, pure perl modules
3541 written for $pm_apiversion will still work for the current
3542 version). perl.c:incpush() and lib/lib.pm will automatically
3543 search in $sitelib for older directories across major versions
3544 back to pm_apiversion. This is only useful if you have a perl
3545 library directory tree structured like the default one. The
3546 versioned site_perl library was introduced in 5.005, so that's
3547 the default setting for this variable. It's hard to imagine
3548 it changing before Perl6. It is included here for symmetry
3549 with xs_apiveprsion -- the searching algorithms will
3550 (presumably) be similar.
3551 See the INSTALL file for how this works.
3554 This variable is defined but not used by Configure.
3555 The value is a plain '' and is not useful.
3558 This variable is defined but not used by Configure.
3559 The value is a plain '' and is not useful.
3562 This variable holds the name of the directory below which the
3563 user will install the package. Usually, this is /usr/local, and
3564 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3565 man pages in /usr/local/man, etc. It is only used to set defaults
3566 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3568 prefixexp (prefix.U):
3569 This variable holds the full absolute path of the directory below
3570 which the user will install the package. Derived from prefix.
3572 privlib (privlib.U):
3573 This variable contains the eventual value of the PRIVLIB symbol,
3574 which is the name of the private library for this package. It may
3575 have a ~ on the front. It is up to the makefile to eventually create
3576 this directory while performing installation (with ~ substitution).
3578 privlibexp (privlib.U):
3579 This variable is the ~name expanded version of privlib, so that you
3580 may use it directly in Makefiles or shell scripts.
3582 procselfexe (d_procselfexe.U):
3583 If d_procselfexe is defined, $procselfexe is the filename
3584 of the symbolic link pointing to the absolute pathname of
3585 the executing program.
3587 prototype (prototype.U):
3588 This variable holds the eventual value of CAN_PROTOTYPE, which
3589 indicates the C compiler can handle funciton prototypes.
3591 ptrsize (ptrsize.U):
3592 This variable contains the value of the PTRSIZE symbol, which
3593 indicates to the C program how many bytes there are in a pointer.
3595 quadkind (quadtype.U):
3596 This variable, if defined, encodes the type of a quad:
3597 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3599 quadtype (quadtype.U):
3600 This variable defines Quad_t to be something like long, int,
3601 long long, int64_t, or whatever type is used for 64-bit integers.
3603 randbits (randfunc.U):
3604 Indicates how many bits are produced by the function used to
3605 generate normalized random numbers.
3607 randfunc (randfunc.U):
3608 Indicates the name of the random number function to use.
3609 Values include drand48, random, and rand. In C programs,
3610 the 'Drand01' macro is defined to generate uniformly distributed
3611 random numbers over the range [0., 1.[ (see drand01 and nrand).
3613 random_r_proto (d_random_r.U):
3614 This variable encodes the prototype of random_r.
3616 randseedtype (randfunc.U):
3617 Indicates the type of the argument of the seedfunc.
3619 ranlib (orderlib.U):
3620 This variable is set to the pathname of the ranlib program, if it is
3621 needed to generate random libraries. Set to ":" if ar can generate
3622 random libraries or if random libraries are not supported
3624 rd_nodata (nblock_io.U):
3625 This variable holds the return code from read() when no data is
3626 present. It should be -1, but some systems return 0 when O_NDELAY is
3627 used, which is a shame because you cannot make the difference between
3628 no data and an EOF.. Sigh!
3630 readdir64_r_proto (d_readdir64_r.U):
3631 This variable encodes the prototype of readdir64_r.
3633 readdir_r_proto (d_readdir_r.U):
3634 This variable encodes the prototype of readdir_r.
3636 revision (patchlevel.U):
3637 The value of revision comes from the patchlevel.h file.
3638 In a version number such as 5.6.1, this is the "5".
3639 In patchlevel.h, this is referred to as "PERL_REVISION".
3642 This variable is used internally by Configure to determine the
3643 full pathname (if any) of the rm program. After Configure runs,
3644 the value is reset to a plain "rm" and is not useful.
3647 This variable is defined but not used by Configure.
3648 The value is a plain '' and is not useful.
3651 This variable contains the command used by Configure
3652 to copy and execute a cross-compiled executable in the
3653 target host. Useful and available only during Perl build.
3654 Empty string '' if not cross-compiling.
3657 This variable contains 'true' or 'false' depending whether the
3658 nm extraction should be performed or not, according to the value
3659 of usenm and the flags on the Configure command line.
3661 sched_yield (d_pthread_y.U):
3662 This variable defines the way to yield the execution
3663 of the current thread.
3665 scriptdir (scriptdir.U):
3666 This variable holds the name of the directory in which the user wants
3667 to put publicly scripts for the package in question. It is either
3668 the same directory as for binaries, or a special one that can be
3669 mounted across different architectures, like /usr/share. Programs
3670 must be prepared to deal with ~name expansion.
3672 scriptdirexp (scriptdir.U):
3673 This variable is the same as scriptdir, but is filename expanded
3674 at configuration time, for programs not wanting to bother with it.
3677 This variable is used internally by Configure to determine the
3678 full pathname (if any) of the sed program. After Configure runs,
3679 the value is reset to a plain "sed" and is not useful.
3681 seedfunc (randfunc.U):
3682 Indicates the random number generating seed function.
3683 Values include srand48, srandom, and srand.
3685 selectminbits (selectminbits.U):
3686 This variable holds the minimum number of bits operated by select.
3687 That is, if you do select(n, ...), how many bits at least will be
3688 cleared in the masks if some activity is detected. Usually this
3689 is either n or 32*ceil(n/32), especially many little-endians do
3690 the latter. This is only useful if you have select(), naturally.
3692 selecttype (selecttype.U):
3693 This variable holds the type used for the 2nd, 3rd, and 4th
3694 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3695 is defined, and 'int *' otherwise. This is only useful if you
3696 have select(), naturally.
3699 This variable is defined but not used by Configure.
3700 The value is a plain '' and is not useful.
3702 setgrent_r_proto (d_setgrent_r.U):
3703 This variable encodes the prototype of setgrent_r.
3705 sethostent_r_proto (d_sethostent_r.U):
3706 This variable encodes the prototype of sethostent_r.
3708 setlocale_r_proto (d_setlocale_r.U):
3709 This variable encodes the prototype of setlocale_r.
3711 setnetent_r_proto (d_setnetent_r.U):
3712 This variable encodes the prototype of setnetent_r.
3714 setprotoent_r_proto (d_setprotoent_r.U):
3715 This variable encodes the prototype of setprotoent_r.
3717 setpwent_r_proto (d_setpwent_r.U):
3718 This variable encodes the prototype of setpwent_r.
3720 setservent_r_proto (d_setservent_r.U):
3721 This variable encodes the prototype of setservent_r.
3724 This variable contains the full pathname of the shell used
3725 on this system to execute Bourne shell scripts. Usually, this will be
3726 /bin/sh, though it's possible that some systems will have /bin/ksh,
3727 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3729 This unit comes before Options.U, so you can't set sh with a '-D'
3730 option, though you can override this (and startsh)
3731 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3734 This variable is defined but not used by Configure.
3735 The value is a plain '' and is not useful.
3737 sharpbang (spitshell.U):
3738 This variable contains the string #! if this system supports that
3741 shmattype (d_shmat.U):
3742 This symbol contains the type of pointer returned by shmat().
3743 It can be 'void *' or 'char *'.
3745 shortsize (intsize.U):
3746 This variable contains the value of the SHORTSIZE symbol which
3747 indicates to the C program how many bytes there are in a short.
3749 shrpenv (libperl.U):
3750 If the user builds a shared libperl.so, then we need to tell the
3751 'perl' executable where it will be able to find the installed libperl.so.
3752 One way to do this on some systems is to set the environment variable
3753 LD_RUN_PATH to the directory that will be the final location of the
3754 shared libperl.so. The makefile can use this with something like
3755 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3757 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3760 See the main perl Makefile.SH for actual working usage.
3761 Alternatively, we might be able to use a command line option such
3762 as -R $archlibexp/CORE (Solaris) or -Wl,-rpath
3763 $archlibexp/CORE (Linux).
3765 shsharp (spitshell.U):
3766 This variable tells further Configure units whether your sh can
3769 sig_count (sig_name.U):
3770 This variable holds a number larger than the largest valid
3771 signal number. This is usually the same as the NSIG macro.
3773 sig_name (sig_name.U):
3774 This variable holds the signal names, space separated. The leading
3775 SIG in signal name is removed. A ZERO is prepended to the
3776 list. This is currently not used.
3778 sig_name_init (sig_name.U):
3779 This variable holds the signal names, enclosed in double quotes and
3780 separated by commas, suitable for use in the SIG_NAME definition
3781 below. A "ZERO" is prepended to the list, and the list is
3782 terminated with a plain 0. The leading SIG in signal names
3783 is removed. See sig_num.
3785 sig_num (sig_name.U):
3786 This variable holds the signal numbers, space separated. A ZERO is
3787 prepended to the list (corresponding to the fake SIGZERO), and
3788 the list is terminated with a 0. Those numbers correspond to
3789 the value of the signal listed in the same place within the
3792 sig_num_init (sig_name.U):
3793 This variable holds the signal numbers, enclosed in double quotes and
3794 separated by commas, suitable for use in the SIG_NUM definition
3795 below. A "ZERO" is prepended to the list, and the list is
3796 terminated with a plain 0.
3798 sig_size (sig_name.U):
3799 This variable contains the number of elements of the sig_name
3800 and sig_num arrays, excluding the final NULL entry.
3802 signal_t (d_voidsig.U):
3803 This variable holds the type of the signal handler (void or int).
3805 sitearch (sitearch.U):
3806 This variable contains the eventual value of the SITEARCH symbol,
3807 which is the name of the private library for this package. It may
3808 have a ~ on the front. It is up to the makefile to eventually create
3809 this directory while performing installation (with ~ substitution).
3810 The standard distribution will put nothing in this directory.
3811 After perl has been installed, users may install their own local
3812 architecture-dependent modules in this directory with
3813 MakeMaker Makefile.PL
3814 or equivalent. See INSTALL for details.
3816 sitearchexp (sitearch.U):
3817 This variable is the ~name expanded version of sitearch, so that you
3818 may use it directly in Makefiles or shell scripts.
3820 sitebin (sitebin.U):
3821 This variable holds the name of the directory in which the user wants
3822 to put add-on publicly executable files for the package in question. It
3823 is most often a local directory such as /usr/local/bin. Programs using
3824 this variable must be prepared to deal with ~name substitution.
3825 The standard distribution will put nothing in this directory.
3826 After perl has been installed, users may install their own local
3827 executables in this directory with
3828 MakeMaker Makefile.PL
3829 or equivalent. See INSTALL for details.
3831 sitebinexp (sitebin.U):
3832 This is the same as the sitebin variable, but is filename expanded at
3833 configuration time, for use in your makefiles.
3835 sitelib (sitelib.U):
3836 This variable contains the eventual value of the SITELIB symbol,
3837 which is the name of the private library for this package. It may
3838 have a ~ on the front. It is up to the makefile to eventually create
3839 this directory while performing installation (with ~ substitution).
3840 The standard distribution will put nothing in this directory.
3841 After perl has been installed, users may install their own local
3842 architecture-independent modules in this directory with
3843 MakeMaker Makefile.PL
3844 or equivalent. See INSTALL for details.
3846 sitelib_stem (sitelib.U):
3847 This variable is $sitelibexp with any trailing version-specific component
3848 removed. The elements in inc_version_list (inc_version_list.U) can
3849 be tacked onto this variable to generate a list of directories to search.
3851 sitelibexp (sitelib.U):
3852 This variable is the ~name expanded version of sitelib, so that you
3853 may use it directly in Makefiles or shell scripts.
3855 siteprefix (siteprefix.U):
3856 This variable holds the full absolute path of the directory below
3857 which the user will install add-on packages.
3858 See INSTALL for usage and examples.
3860 siteprefixexp (siteprefix.U):
3861 This variable holds the full absolute path of the directory below
3862 which the user will install add-on packages. Derived from siteprefix.
3864 sizesize (sizesize.U):
3865 This variable contains the size of a sizetype in bytes.
3867 sizetype (sizetype.U):
3868 This variable defines sizetype to be something like size_t,
3869 unsigned long, or whatever type is used to declare length
3870 parameters for string functions.
3873 This variable is defined but not used by Configure.
3874 The value is a plain '' and is not useful.
3877 This variable is defined but not used by Configure.
3878 The value is a plain '' and is not useful.
3881 This variable holds the extension used to identify shared libraries
3882 (also known as shared objects) on the system. Usually set to 'so'.
3884 sockethdr (d_socket.U):
3885 This variable has any cpp '-I' flags needed for socket support.
3887 socketlib (d_socket.U):
3888 This variable has the names of any libraries needed for socket support.
3890 socksizetype (socksizetype.U):
3891 This variable holds the type used for the size argument
3892 for various socket calls like accept. Usual values include
3893 socklen_t, size_t, and int.
3896 This variable is used internally by Configure to determine the
3897 full pathname (if any) of the sort program. After Configure runs,
3898 the value is reset to a plain "sort" and is not useful.
3900 spackage (package.U):
3901 This variable contains the name of the package being constructed,
3902 with the first letter uppercased, i.e. suitable for starting
3905 spitshell (spitshell.U):
3906 This variable contains the command necessary to spit out a runnable
3907 shell on this system. It is either cat or a grep '-v' for # comments.
3909 sPRId64 (quadfio.U):
3910 This variable, if defined, contains the string used by stdio to
3911 format 64-bit decimal numbers (format 'd') for output.
3913 sPRIeldbl (longdblfio.U):
3914 This variable, if defined, contains the string used by stdio to
3915 format long doubles (format 'e') for output.
3917 sPRIEUldbl (longdblfio.U):
3918 This variable, if defined, contains the string used by stdio to
3919 format long doubles (format 'E') for output.
3920 The 'U' in the name is to separate this from sPRIeldbl so that even
3921 case-blind systems can see the difference.
3923 sPRIfldbl (longdblfio.U):
3924 This variable, if defined, contains the string used by stdio to
3925 format long doubles (format 'f') for output.
3927 sPRIFUldbl (longdblfio.U):
3928 This variable, if defined, contains the string used by stdio to
3929 format long doubles (format 'F') for output.
3930 The 'U' in the name is to separate this from sPRIfldbl so that even
3931 case-blind systems can see the difference.
3933 sPRIgldbl (longdblfio.U):
3934 This variable, if defined, contains the string used by stdio to
3935 format long doubles (format 'g') for output.
3937 sPRIGUldbl (longdblfio.U):
3938 This variable, if defined, contains the string used by stdio to
3939 format long doubles (format 'G') for output.
3940 The 'U' in the name is to separate this from sPRIgldbl so that even
3941 case-blind systems can see the difference.
3943 sPRIi64 (quadfio.U):
3944 This variable, if defined, contains the string used by stdio to
3945 format 64-bit decimal numbers (format 'i') for output.
3947 sPRIo64 (quadfio.U):
3948 This variable, if defined, contains the string used by stdio to
3949 format 64-bit octal numbers (format 'o') for output.
3951 sPRIu64 (quadfio.U):
3952 This variable, if defined, contains the string used by stdio to
3953 format 64-bit unsigned decimal numbers (format 'u') for output.
3955 sPRIx64 (quadfio.U):
3956 This variable, if defined, contains the string used by stdio to
3957 format 64-bit hexadecimal numbers (format 'x') for output.
3959 sPRIXU64 (quadfio.U):
3960 This variable, if defined, contains the string used by stdio to
3961 format 64-bit hExADECimAl numbers (format 'X') for output.
3962 The 'U' in the name is to separate this from sPRIx64 so that even
3963 case-blind systems can see the difference.
3965 srand48_r_proto (d_srand48_r.U):
3966 This variable encodes the prototype of srand48_r.
3968 srandom_r_proto (d_srandom_r.U):
3969 This variable encodes the prototype of srandom_r.
3972 This variable holds the path to the package source. It is up to
3973 the Makefile to use this variable and set VPATH accordingly to
3974 find the sources remotely.
3976 sSCNfldbl (longdblfio.U):
3977 This variable, if defined, contains the string used by stdio to
3978 format long doubles (format 'f') for input.
3980 ssizetype (ssizetype.U):
3981 This variable defines ssizetype to be something like ssize_t,
3982 long or int. It is used by functions that return a count
3983 of bytes or an error condition. It must be a signed type.
3984 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3986 startperl (startperl.U):
3987 This variable contains the string to put on the front of a perl
3988 script to make sure (hopefully) that it runs with perl and not some
3989 shell. Of course, that leading line must be followed by the classical
3991 eval 'exec perl -S $0 ${1+"$@"}'
3992 if $running_under_some_shell;
3993 to guarantee perl startup should the shell execute the script. Note
3994 that this magic incatation is not understood by csh.
3996 startsh (startsh.U):
3997 This variable contains the string to put on the front of a shell
3998 script to make sure (hopefully) that it runs with sh and not some
4001 static_ext (Extensions.U):
4002 This variable holds a list of XS extension files we want to
4003 link statically into the package. It is used by Makefile.
4005 stdchar (stdchar.U):
4006 This variable conditionally defines STDCHAR to be the type of char
4007 used in stdio.h. It has the values "unsigned char" or "char".
4009 stdio_base (d_stdstdio.U):
4010 This variable defines how, given a FILE pointer, fp, to access the
4011 _base field (or equivalent) of stdio.h's FILE structure. This will
4012 be used to define the macro FILE_base(fp).
4014 stdio_bufsiz (d_stdstdio.U):
4015 This variable defines how, given a FILE pointer, fp, to determine
4016 the number of bytes store in the I/O buffer pointer to by the
4017 _base field (or equivalent) of stdio.h's FILE structure. This will
4018 be used to define the macro FILE_bufsiz(fp).
4020 stdio_cnt (d_stdstdio.U):
4021 This variable defines how, given a FILE pointer, fp, to access the
4022 _cnt field (or equivalent) of stdio.h's FILE structure. This will
4023 be used to define the macro FILE_cnt(fp).
4025 stdio_filbuf (d_stdstdio.U):
4026 This variable defines how, given a FILE pointer, fp, to tell
4027 stdio to refill its internal buffers (?). This will
4028 be used to define the macro FILE_filbuf(fp).
4030 stdio_ptr (d_stdstdio.U):
4031 This variable defines how, given a FILE pointer, fp, to access the
4032 _ptr field (or equivalent) of stdio.h's FILE structure. This will
4033 be used to define the macro FILE_ptr(fp).
4035 stdio_stream_array (stdio_streams.U):
4036 This variable tells the name of the array holding the stdio streams.
4037 Usual values include _iob, __iob, and __sF.
4039 strerror_r_proto (d_strerror_r.U):
4040 This variable encodes the prototype of strerror_r.
4042 strings (i_string.U):
4043 This variable holds the full path of the string header that will be
4044 used. Typically /usr/include/string.h or /usr/include/strings.h.
4047 This variable is defined but not used by Configure.
4048 The value is a plain '' and is not useful.
4050 subversion (patchlevel.U):
4051 The subversion level of this package.
4052 The value of subversion comes from the patchlevel.h file.
4053 In a version number such as 5.6.1, this is the "1".
4054 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
4055 This is unique to perl.
4058 This variable holds the place where the manual is located on this
4059 system. It is not the place where the user wants to put his manual
4060 pages. Rather it is the place where Configure may look to find manual
4061 for unix commands (section 1 of the manual usually). See mansrc.
4064 This variable is defined but not used by Configure.
4065 The value is a plain '' and is not useful.
4068 This variable is defined but not used by Configure.
4069 The value is a plain '' and is not useful.
4071 targetarch (Cross.U):
4072 If cross-compiling, this variable contains the target architecture.
4073 If not, this will be empty.
4076 This variable is defined but not used by Configure.
4077 The value is a plain '' and is not useful.
4080 This variable is defined but not used by Configure.
4081 The value is a plain '' and is not useful.
4084 This variable is used internally by Configure to determine the
4085 full pathname (if any) of the test program. After Configure runs,
4086 the value is reset to a plain "test" and is not useful.
4088 timeincl (i_time.U):
4089 This variable holds the full path of the included time header(s).
4091 timetype (d_time.U):
4092 This variable holds the type returned by time(). It can be long,
4093 or time_t on BSD sites (in which case <sys/types.h> should be
4094 included). Anyway, the type Time_t should be used.
4096 tmpnam_r_proto (d_tmpnam_r.U):
4097 This variable encodes the prototype of tmpnam_r.
4100 This variable contains the command used by Configure
4101 to copy to from the target host. Useful and available
4102 only during Perl build.
4103 The string ':' if not cross-compiling.
4106 This variable is used internally by Configure to determine the
4107 full pathname (if any) of the touch program. After Configure runs,
4108 the value is reset to a plain "touch" and is not useful.
4111 This variable is used internally by Configure to determine the
4112 full pathname (if any) of the tr program. After Configure runs,
4113 the value is reset to a plain "tr" and is not useful.
4116 This variable contains the value to be passed to the tr(1)
4117 command to transliterate a newline. Typical values are
4118 '\012' and '\n'. This is needed for EBCDIC systems where
4119 newline is not necessarily '\012'.
4122 This variable is defined but not used by Configure.
4123 The value is a plain '' and is not useful.
4125 ttyname_r_proto (d_ttyname_r.U):
4126 This variable encodes the prototype of ttyname_r.
4129 This variable is the size of an U16 in bytes.
4132 This variable contains the C type used for Perl's U16.
4135 This variable is the size of an U32 in bytes.
4138 This variable contains the C type used for Perl's U32.
4141 This variable is the size of an U64 in bytes.
4144 This variable contains the C type used for Perl's U64.
4147 This variable is the size of an U8 in bytes.
4150 This variable contains the C type used for Perl's U8.
4153 This variable contains the format string used for printing a Uid_t.
4155 uidsign (uidsign.U):
4156 This variable contains the signedness of a uidtype.
4157 1 for unsigned, -1 for signed.
4159 uidsize (uidsize.U):
4160 This variable contains the size of a uidtype in bytes.
4162 uidtype (uidtype.U):
4163 This variable defines Uid_t to be something like uid_t, int,
4164 ushort, or whatever type is used to declare user ids in the kernel.
4167 This variable is used internally by Configure to determine the
4168 full pathname (if any) of the uname program. After Configure runs,
4169 the value is reset to a plain "uname" and is not useful.
4172 This variable is used internally by Configure to determine the
4173 full pathname (if any) of the uniq program. After Configure runs,
4174 the value is reset to a plain "uniq" and is not useful.
4176 uquadtype (quadtype.U):
4177 This variable defines Uquad_t to be something like unsigned long,
4178 unsigned int, unsigned long long, uint64_t, or whatever type is
4179 used for 64-bit integers.
4181 use5005threads (usethreads.U):
4182 This variable conditionally defines the USE_5005THREADS symbol,
4183 and indicates that Perl should be built to use the 5.005-based
4184 threading implementation.
4186 use64bitall (use64bits.U):
4187 This variable conditionally defines the USE_64_BIT_ALL symbol,
4188 and indicates that 64-bit integer types should be used
4189 when available. The maximal possible
4190 64-bitness is employed: LP64 or ILP64, meaning that you will
4191 be able to use more than 2 gigabytes of memory. This mode is
4192 even more binary incompatible than USE_64_BIT_INT. You may not
4193 be able to run the resulting executable in a 32-bit CPU at all or
4194 you may need at least to reboot your OS to 64-bit mode.
4196 use64bitint (use64bits.U):
4197 This variable conditionally defines the USE_64_BIT_INT symbol,
4198 and indicates that 64-bit integer types should be used
4199 when available. The minimal possible 64-bitness
4200 is employed, just enough to get 64-bit integers into Perl.
4201 This may mean using for example "long longs", while your memory
4202 may still be limited to 2 gigabytes.
4204 usecrosscompile (Cross.U):
4205 This variable conditionally defines the USE_CROSS_COMPILE symbol,
4206 and indicates that Perl has been cross-compiled.
4209 This variable indicates if the system supports dynamic
4210 loading of some sort. See also dlsrc and dlobj.
4212 useithreads (usethreads.U):
4213 This variable conditionally defines the USE_ITHREADS symbol,
4214 and indicates that Perl should be built to use the interpreter-based
4215 threading implementation.
4217 uselargefiles (uselfs.U):
4218 This variable conditionally defines the USE_LARGE_FILES symbol,
4219 and indicates that large file interfaces should be used when
4222 uselongdouble (uselongdbl.U):
4223 This variable conditionally defines the USE_LONG_DOUBLE symbol,
4224 and indicates that long doubles should be used when available.
4226 usemorebits (usemorebits.U):
4227 This variable conditionally defines the USE_MORE_BITS symbol,
4228 and indicates that explicit 64-bit interfaces and long doubles
4229 should be used when available.
4231 usemultiplicity (usemultiplicity.U):
4232 This variable conditionally defines the MULTIPLICITY symbol,
4233 and indicates that Perl should be built to use multiplicity.
4235 usemymalloc (mallocsrc.U):
4236 This variable contains y if the malloc that comes with this package
4237 is desired over the system's version of malloc. People often include
4238 special versions of malloc for effiency, but such versions are often
4239 less portable. See also mallocsrc and mallocobj.
4240 If this is 'y', then -lmalloc is removed from $libs.
4243 This variable contains 'true' or 'false' depending whether the
4244 nm extraction is wanted or not.
4246 useopcode (Extensions.U):
4247 This variable holds either 'true' or 'false' to indicate
4248 whether the Opcode extension should be used. The sole
4249 use for this currently is to allow an easy mechanism
4250 for users to skip the Opcode extension from the Configure
4253 useperlio (useperlio.U):
4254 This variable conditionally defines the USE_PERLIO symbol,
4255 and indicates that the PerlIO abstraction should be
4258 useposix (Extensions.U):
4259 This variable holds either 'true' or 'false' to indicate
4260 whether the POSIX extension should be used. The sole
4261 use for this currently is to allow an easy mechanism
4262 for hints files to indicate that POSIX will not compile
4263 on a particular system.
4265 usereentrant (usethreads.U):
4266 This variable conditionally defines the USE_REENTRANT_API symbol,
4267 which indicates that the thread code may try to use the various
4268 _r versions of library functions. This is only potentially
4269 meaningful if usethreads is set and is very experimental, it is
4270 not even prompted for.
4273 This variable is set to true when the user agrees to use sfio.
4274 It is set to false when sfio is not available or when the user
4275 explicitely requests not to use sfio. It is here primarily so
4276 that command-line settings can override the auto-detection of
4277 d_sfio without running into a "WHOA THERE".
4279 useshrplib (libperl.U):
4280 This variable is set to 'yes' if the user wishes
4281 to build a shared libperl, and 'no' otherwise.
4283 usesocks (usesocks.U):
4284 This variable conditionally defines the USE_SOCKS symbol,
4285 and indicates that Perl should be built to use SOCKS.
4287 usethreads (usethreads.U):
4288 This variable conditionally defines the USE_THREADS symbol,
4289 and indicates that Perl should be built to use threads.
4291 usevendorprefix (vendorprefix.U):
4292 This variable tells whether the vendorprefix
4293 and consequently other vendor* paths are in use.
4295 usevfork (d_vfork.U):
4296 This variable is set to true when the user accepts to use vfork.
4297 It is set to false when no vfork is available or when the user
4298 explicitely requests not to use vfork.
4301 This variable holds the path of the include files, which is
4302 usually /usr/include. It is mainly used by other Configure units.
4305 This variable is defined but not used by Configure.
4306 The value is a plain '' and is not useful.
4308 uvoformat (perlxvf.U):
4309 This variable contains the format string used for printing
4310 a Perl UV as an unsigned octal integer.
4313 This variable is the size of a UV in bytes.
4316 This variable contains the C type used for Perl's UV.
4318 uvuformat (perlxvf.U):
4319 This variable contains the format string used for printing
4320 a Perl UV as an unsigned decimal integer.
4322 uvxformat (perlxvf.U):
4323 This variable contains the format string used for printing
4324 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
4326 uvXUformat (perlxvf.U):
4327 This variable contains the format string used for printing
4328 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
4330 vendorarch (vendorarch.U):
4331 This variable contains the value of the PERL_VENDORARCH symbol.
4332 It may have a ~ on the front.
4333 The standard distribution will put nothing in this directory.
4334 Vendors who distribute perl may wish to place their own
4335 architecture-dependent modules and extensions in this directory with
4336 MakeMaker Makefile.PL INSTALLDIRS=vendor
4337 or equivalent. See INSTALL for details.
4339 vendorarchexp (vendorarch.U):
4340 This variable is the ~name expanded version of vendorarch, so that you
4341 may use it directly in Makefiles or shell scripts.
4343 vendorbin (vendorbin.U):
4344 This variable contains the eventual value of the VENDORBIN symbol.
4345 It may have a ~ on the front.
4346 The standard distribution will put nothing in this directory.
4347 Vendors who distribute perl may wish to place additional
4348 binaries in this directory with
4349 MakeMaker Makefile.PL INSTALLDIRS=vendor
4350 or equivalent. See INSTALL for details.
4352 vendorbinexp (vendorbin.U):
4353 This variable is the ~name expanded version of vendorbin, so that you
4354 may use it directly in Makefiles or shell scripts.
4356 vendorlib (vendorlib.U):
4357 This variable contains the eventual value of the VENDORLIB symbol,
4358 which is the name of the private library for this package.
4359 The standard distribution will put nothing in this directory.
4360 Vendors who distribute perl may wish to place their own
4361 modules in this directory with
4362 MakeMaker Makefile.PL INSTALLDIRS=vendor
4363 or equivalent. See INSTALL for details.
4365 vendorlib_stem (vendorlib.U):
4366 This variable is $vendorlibexp with any trailing version-specific component
4367 removed. The elements in inc_version_list (inc_version_list.U) can
4368 be tacked onto this variable to generate a list of directories to search.
4370 vendorlibexp (vendorlib.U):
4371 This variable is the ~name expanded version of vendorlib, so that you
4372 may use it directly in Makefiles or shell scripts.
4374 vendorprefix (vendorprefix.U):
4375 This variable holds the full absolute path of the directory below
4376 which the vendor will install add-on packages.
4377 See INSTALL for usage and examples.
4379 vendorprefixexp (vendorprefix.U):
4380 This variable holds the full absolute path of the directory below
4381 which the vendor will install add-on packages. Derived from vendorprefix.
4383 version (patchlevel.U):
4384 The full version number of this package, such as 5.6.1 (or 5_6_1).
4385 This combines revision, patchlevel, and subversion to get the
4386 full version number, including any possible subversions.
4387 This is suitable for use as a directory name, and hence is
4388 filesystem dependent.
4390 version_patchlevel_string (patchlevel.U):
4391 This is a string combining version, subversion and
4392 perl_patchlevel (if perl_patchlevel is non-zero).
4393 It is typically something like
4394 'version 7 subversion 1' or
4395 'version 7 subversion 1 patchlevel 11224'
4396 It is computed here to avoid duplication of code in myconfig.SH
4399 versiononly (versiononly.U):
4400 If set, this symbol indicates that only the version-specific
4401 components of a perl installation should be installed.
4402 This may be useful for making a test installation of a new
4403 version without disturbing the existing installation.
4404 Setting versiononly is equivalent to setting installperl's -v option.
4405 In particular, the non-versioned scripts and programs such as
4406 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
4407 (see INSTALL for a more complete list). Nor are the man
4409 Usually, this is undef.
4412 This variable is defined but not used by Configure.
4413 The value is a plain '' and is not useful.
4415 voidflags (voidflags.U):
4416 This variable contains the eventual value of the VOIDFLAGS symbol,
4417 which indicates how much support of the void type is given by this
4418 compiler. See VOIDFLAGS for more info.
4421 This variable holds extra path (space-separated) used to find
4422 libraries on this platform, for example CPU-specific libraries
4423 (on multi-CPU platforms) may be listed here.
4425 xs_apiversion (xs_apiversion.U):
4426 This variable contains the version of the oldest perl binary
4427 compatible with the present perl. perl.c:incpush() and
4428 lib/lib.pm will automatically search in $sitearch for older
4429 directories across major versions back to xs_apiversion.
4430 This is only useful if you have a perl library directory tree
4431 structured like the default one.
4432 See INSTALL for how this works.
4433 The versioned site_perl directory was introduced in 5.005,
4434 so that is the lowest possible value.
4435 Since this can depend on compile time options (such as
4436 bincompat) it is set by Configure. Other non-default sources
4437 of potential incompatibility, such as multiplicity, threads,
4438 debugging, 64bits, sfio, etc., are not checked for currently,
4439 though in principle we could go snooping around in old
4443 This variable holds the name of the compiler compiler we
4444 want to use in the Makefile. It can be yacc, byacc, or bison -y.
4447 This variable contains any additional yacc flags desired by the
4448 user. It is up to the Makefile to use this.
4451 This variable is defined but not used by Configure.
4452 The value is a plain '' and is not useful.
4455 This variable is used internally by Configure to determine the
4456 full pathname (if any) of the zip program. After Configure runs,
4457 the value is reset to a plain "zip" and is not useful.