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
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double-- or a long double when applicable. Usual values are
30 2, 4 and 8. The default is eight, for safety.
32 ansi2knr (ansi2knr.U):
33 This variable is set if the user needs to run ansi2knr.
34 Currently, this is not supported, so we just abort.
36 aphostname (d_gethname.U):
37 This variable contains the command which can be used to compute the
38 host name. The command is fully qualified by its absolute path, to make
39 it safe when used by a process with super-user privileges.
41 api_revision (patchlevel.U):
42 The three variables, api_revision, api_version, and
43 api_subversion, specify the version of the oldest perl binary
44 compatible with the present perl. In a full version string
45 such as '5.6.1', api_revision is the '5'.
46 Prior to 5.5.640, the format was a floating point number,
48 perl.c:incpush() and lib/lib.pm will automatically search in
49 $sitelib/.. for older directories back to the limit specified
50 by these api_ variables. This is only useful if you have a
51 perl library directory tree structured like the default one.
52 See INSTALL for how this works. The versioned site_perl
53 directory was introduced in 5.005, so that is the lowest
54 possible value. The version list appropriate for the current
55 system is determined in inc_version_list.U.
56 XXX To do: Since compatibility can depend on compile time
57 options (such as bincompat, longlong, etc.) it should
58 (perhaps) be set by Configure, but currently it isn't.
59 Currently, we read a hard-wired value from patchlevel.h.
60 Perhaps what we ought to do is take the hard-wired value from
61 patchlevel.h but then modify it if the current Configure
62 options warrant. patchlevel.h then would use an #ifdef guard.
64 api_subversion (patchlevel.U):
65 The three variables, api_revision, api_version, and
66 api_subversion, specify the version of the oldest perl binary
67 compatible with the present perl. In a full version string
68 such as '5.6.1', api_subversion is the '1'. See api_revision for
71 api_version (patchlevel.U):
72 The three variables, api_revision, api_version, and
73 api_subversion, specify the version of the oldest perl binary
74 compatible with the present perl. In a full version string
75 such as '5.6.1', api_version is the '6'. See api_revision for
76 full details. As a special case, 5.5.0 is rendered in the
77 old-style as 5.005. (In the 5.005_0x maintenance series,
78 this was the only versioned directory in $sitelib.)
80 api_versionstring (patchlevel.U):
81 This variable combines api_revision, api_version, and
82 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
83 for use as a directory name. This is filesystem dependent.
86 This variable is used internally by Configure to determine the
87 full pathname (if any) of the ar program. After Configure runs,
88 the value is reset to a plain "ar" and is not useful.
91 This variable holds the name of the directory in which the user wants
92 to put architecture-dependent public library files for $package.
93 It is most often a local directory such as /usr/local/lib.
94 Programs using this variable must be prepared to deal
95 with filename expansion.
97 archlibexp (archlib.U):
98 This variable is the same as the archlib variable, but is
99 filename expanded at configuration time, for convenient use.
101 archname64 (use64bits.U):
102 This variable is used for the 64-bitness part of $archname.
104 archname (archname.U):
105 This variable is a short name to characterize the current
106 architecture. It is used mainly to construct the default archlib.
109 This variable defines any additional objects that must be linked
110 in with the program on this architecture. On unix, it is usually
111 empty. It is typically used to include emulations of unix calls
112 or other facilities. For perl on OS/2, for example, this would
116 This variable is used internally by Configure to determine the
117 full pathname (if any) of the awk program. After Configure runs,
118 the value is reset to a plain "awk" and is not useful.
121 The base revision level of this package, from the .package file.
124 This variable is defined but not used by Configure.
125 The value is a plain '' and is not useful.
128 This variable holds the name of the directory in which the user wants
129 to put publicly executable images for the package in question. It
130 is most often a local directory such as /usr/local/bin. Programs using
131 this variable must be prepared to deal with ~name substitution.
133 bincompat5005 (bincompat5005.U):
134 This variable contains y if this version of Perl should be
135 binary-compatible with Perl 5.005.
138 This is the same as the bin variable, but is filename expanded at
139 configuration time, for use in your makefiles.
142 This variable is defined but not used by Configure.
143 The value is a plain '' and is not useful.
146 This variable is used internally by Configure to determine the
147 full pathname (if any) of the byacc program. After Configure runs,
148 the value is reset to a plain "byacc" and is not useful.
150 byteorder (byteorder.U):
151 This variable holds the byte order. In the following, larger digits
152 indicate more significance. The variable byteorder is either 4321
153 on a big-endian machine, or 1234 on a little-endian, or 87654321
154 on a Cray ... or 3412 with weird order !
157 This variable contains the \c string if that is what causes the echo
158 command to suppress newline. Otherwise it is null. Correct usage is
159 $echo $n "prompt for a question: $c".
161 castflags (d_castneg.U):
162 This variable contains a flag that precise difficulties the
163 compiler has casting odd floating values to unsigned long:
165 1 = couldn't cast < 0
166 2 = couldn't cast >= 0x80000000
167 4 = couldn't cast in argument expression list
170 This variable is used internally by Configure to determine the
171 full pathname (if any) of the cat program. After Configure runs,
172 the value is reset to a plain "cat" and is not useful.
175 This variable holds the name of a command to execute a C compiler which
176 can resolve multiple global references that happen to have the same
177 name. Usual values are 'cc' and 'gcc'.
178 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
180 cccdlflags (dlsrc.U):
181 This variable contains any special flags that might need to be
182 passed with 'cc -c' to compile modules to be used to create a shared
183 library that will be used for dynamic loading. For hpux, this
184 should be +z. It is up to the makefile to use it.
187 This variable contains any special flags that might need to be
188 passed to cc to link with a shared library for dynamic loading.
189 It is up to the makefile to use it. For sunos 4.1, it should
193 This variable contains any additional C compiler flags desired by
194 the user. It is up to the Makefile to use this.
196 ccflags_uselargefiles (uselfs.U):
197 This variable contains the compiler flags needed by large file builds
198 and added to ccflags by hints files.
201 This can set either by hints files or by Configure. If using
202 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
203 Some platforms, however, make good use of this by storing the
204 flavor of the C compiler being used here. For example if using
205 the Sun WorkShop suite, ccname will be 'workshop'.
207 ccsymbols (Cppsym.U):
208 The variable contains the symbols defined by the C compiler alone.
209 The symbols defined by cpp or by cc when it calls cpp are not in
210 this list, see cppsymbols and cppccsymbols.
211 The list is a space-separated list of symbol=value tokens.
213 ccversion (Checkcc.U):
214 This can set either by hints files or by Configure. If using
215 a (non-gcc) vendor cc, this variable may contain a version for
219 Login name of the person who ran the Configure script and answered the
220 questions. This is used to tag both config.sh and config_h.SH.
222 cf_email (cf_email.U):
223 Electronic mail address of the person who ran Configure. This can be
224 used by units that require the user's e-mail, like MailList.U.
227 Holds the output of the "date" command when the configuration file was
228 produced. This is used to tag both config.sh and config_h.SH.
230 charsize (charsize.U):
231 This variable contains the value of the CHARSIZE symbol, which
232 indicates to the C program how many bytes there are in a character.
235 This variable is defined but not used by Configure.
236 The value is a plain '' and is not useful.
239 This variable is defined but not used by Configure.
240 The value is a plain '' and is not useful.
243 This variable is defined but not used by Configure.
244 The value is a plain '' and is not useful.
246 clocktype (d_times.U):
247 This variable holds the type returned by times(). It can be long,
248 or clock_t on BSD sites (in which case <sys/types.h> should be
252 This variable is used internally by Configure to determine the
253 full pathname (if any) of the comm program. After Configure runs,
254 the value is reset to a plain "comm" and is not useful.
257 This variable is defined but not used by Configure.
258 The value is a plain '' and is not useful.
260 CONFIGDOTSH (Oldsyms.U):
261 This is set to 'true' in config.sh so that a shell script
262 sourcing config.sh can tell if it has been sourced already.
264 contains (contains.U):
265 This variable holds the command to do a grep with a proper return
266 status. On most sane systems it is simply "grep". On insane systems
267 it is a grep followed by a cat followed by a test. This variable
268 is primarily for the use of other Configure units.
271 This variable is used internally by Configure to determine the
272 full pathname (if any) of the cp program. After Configure runs,
273 the value is reset to a plain "cp" and is not useful.
276 This variable is defined but not used by Configure.
277 The value is a plain '' and is not useful.
280 This variable is used internally by Configure to determine the
281 full pathname (if any) of the cpp program. After Configure runs,
282 the value is reset to a plain "cpp" and is not useful.
284 cpp_stuff (cpp_stuff.U):
285 This variable contains an identification of the catenation mechanism
286 used by the C preprocessor.
288 cppccsymbols (Cppsym.U):
289 The variable contains the symbols defined by the C compiler
290 when it calls cpp. The symbols defined by the cc alone or cpp
291 alone are not in this list, see ccsymbols and cppsymbols.
292 The list is a space-separated list of symbol=value tokens.
294 cppflags (ccflags.U):
295 This variable holds the flags that will be passed to the C pre-
296 processor. It is up to the Makefile to use it.
298 cpplast (cppstdin.U):
299 This variable has the same functionality as cppminus, only it applies
300 to cpprun and not cppstdin.
302 cppminus (cppstdin.U):
303 This variable contains the second part of the string which will invoke
304 the C preprocessor on the standard input and produce to standard
305 output. This variable will have the value "-" if cppstdin needs
306 a minus to specify standard input, otherwise the value is "".
309 This variable contains the command which will invoke a C preprocessor
310 on standard input and put the output to stdout. It is guaranteed not
311 to be a wrapper and may be a null string if no preprocessor can be
312 made directly available. This preprocessor might be different from the
313 one used by the C compiler. Don't forget to append cpplast after the
314 preprocessor options.
316 cppstdin (cppstdin.U):
317 This variable contains the command which will invoke the C
318 preprocessor on standard input and put the output to stdout.
319 It is primarily used by other Configure units that ask about
320 preprocessor symbols.
322 cppsymbols (Cppsym.U):
323 The variable contains the symbols defined by the C preprocessor
324 alone. The symbols defined by cc or by cc when it calls cpp are
325 not in this list, see ccsymbols and cppccsymbols.
326 The list is a space-separated list of symbol=value tokens.
328 crosscompile (crosscompile.U):
329 This variable conditionally defines the CROSSCOMPILE symbol
330 which signifies that the build process is be a cross-compilation.
331 This is normally set by hints files or from Configure command line.
333 cryptlib (d_crypt.U):
334 This variable holds -lcrypt or the path to a libcrypt.a archive if
335 the crypt() function is not defined in the standard C library. It is
336 up to the Makefile to use this.
339 This variable is used internally by Configure to determine the
340 full pathname (if any) of the csh program. After Configure runs,
341 the value is reset to a plain "csh" and is not useful.
343 d_access (d_access.U):
344 This variable conditionally defines HAS_ACCESS if the access() system
345 call is available to check for access permissions using real IDs.
347 d_accessx (d_accessx.U):
348 This variable conditionally defines the HAS_ACCESSX symbol, which
349 indicates to the C program that the accessx() routine is available.
352 This variable conditionally defines the HAS_ALARM symbol, which
353 indicates to the C program that the alarm() routine is available.
355 d_archlib (archlib.U):
356 This variable conditionally defines ARCHLIB to hold the pathname
357 of architecture-dependent library files for $package. If
358 $archlib is the same as $privlib, then this is set to undef.
361 This variable conditionally defines the HAS_ATOLF symbol, which
362 indicates to the C program that the atolf() routine is available.
365 This variable conditionally defines the HAS_ATOLL symbol, which
366 indicates to the C program that the atoll() routine is available.
368 d_attribut (d_attribut.U):
369 This variable conditionally defines HASATTRIBUTE, which
370 indicates the C compiler can check for function attributes,
371 such as printf formats.
374 This variable conditionally defines the HAS_BCMP symbol if
375 the bcmp() routine is available to compare strings.
378 This variable conditionally defines the HAS_BCOPY symbol if
379 the bcopy() routine is available to copy strings.
381 d_bincompat5005 (bincompat5005.U):
382 This variable conditionally defines BINCOMPAT5005 so that embed.h
383 can take special action if this version of Perl should be
384 binary-compatible with Perl 5.005. This is impossible for builds
385 that use features like threads and multiplicity it is always $undef
389 This symbol conditionally defines the symbol BSD when running on a
392 d_bsdgetpgrp (d_getpgrp.U):
393 This variable conditionally defines USE_BSD_GETPGRP if
394 getpgrp needs one arguments whereas USG one needs none.
396 d_bsdsetpgrp (d_setpgrp.U):
397 This variable conditionally defines USE_BSD_SETPGRP if
398 setpgrp needs two arguments whereas USG one needs none.
399 See also d_setpgid for a POSIX interface.
402 This variable conditionally defines the HAS_BZERO symbol if
403 the bzero() routine is available to set memory to 0.
405 d_casti32 (d_casti32.U):
406 This variable conditionally defines CASTI32, which indicates
407 whether the C compiler can cast large floats to 32-bit ints.
409 d_castneg (d_castneg.U):
410 This variable conditionally defines CASTNEG, which indicates
411 wether the C compiler can cast negative float to unsigned.
413 d_charvspr (d_vprintf.U):
414 This variable conditionally defines CHARVSPRINTF if this system
415 has vsprintf returning type (char*). The trend seems to be to
416 declare it as "int vsprintf()".
419 This variable conditionally defines the HAS_CHOWN symbol, which
420 indicates to the C program that the chown() routine is available.
422 d_chroot (d_chroot.U):
423 This variable conditionally defines the HAS_CHROOT symbol, which
424 indicates to the C program that the chroot() routine is available.
426 d_chsize (d_chsize.U):
427 This variable conditionally defines the CHSIZE symbol, which
428 indicates to the C program that the chsize() routine is available
429 to truncate files. You might need a -lx to get this routine.
431 d_closedir (d_closedir.U):
432 This variable conditionally defines HAS_CLOSEDIR if closedir() is
436 This variable conditionally defines the HASCONST symbol, which
437 indicates to the C program that this C compiler knows about the
441 This variable conditionally defines the CRYPT symbol, which
442 indicates to the C program that the crypt() routine is available
443 to encrypt passwords and the like.
446 This variable conditionally defines the CSH symbol, which
447 indicates to the C program that the C-shell exists.
449 d_cuserid (d_cuserid.U):
450 This variable conditionally defines the HAS_CUSERID symbol, which
451 indicates to the C program that the cuserid() routine is available
452 to get character login names.
454 d_dbl_dig (d_dbl_dig.U):
455 This variable conditionally defines d_dbl_dig if this system's
456 header files provide DBL_DIG, which is the number of significant
457 digits in a double precision number.
459 d_difftime (d_difftime.U):
460 This variable conditionally defines the HAS_DIFFTIME symbol, which
461 indicates to the C program that the difftime() routine is available.
463 d_dirnamlen (i_dirent.U):
464 This variable conditionally defines DIRNAMLEN, which indicates
465 to the C program that the length of directory entry names is
466 provided by a d_namelen field.
468 d_dlerror (d_dlerror.U):
469 This variable conditionally defines the HAS_DLERROR symbol, which
470 indicates to the C program that the dlerror() routine is available.
472 d_dlopen (d_dlopen.U):
473 This variable conditionally defines the HAS_DLOPEN symbol, which
474 indicates to the C program that the dlopen() routine is available.
476 d_dlsymun (d_dlsymun.U):
477 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
478 indicates that we need to prepend an underscore to the symbol
479 name before calling dlsym().
481 d_dosuid (d_dosuid.U):
482 This variable conditionally defines the symbol DOSUID, which
483 tells the C program that it should insert setuid emulation code
484 on hosts which have setuid #! scripts disabled.
486 d_drand48proto (d_drand48proto.U):
487 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
488 which indicates to the C program that the system provides
489 a prototype for the drand48() function. Otherwise, it is
490 up to the program to supply one.
493 This variable conditionally defines HAS_DUP2 if dup2() is
494 available to duplicate file descriptors.
496 d_eaccess (d_eaccess.U):
497 This variable conditionally defines the HAS_EACCESS symbol, which
498 indicates to the C program that the eaccess() routine is available.
500 d_endgrent (d_endgrent.U):
501 This variable conditionally defines the HAS_ENDGRENT symbol, which
502 indicates to the C program that the endgrent() routine is available
503 for sequential access of the group database.
505 d_endhent (d_endhent.U):
506 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
507 available to close whatever was being used for host queries.
509 d_endnent (d_endnent.U):
510 This variable conditionally defines HAS_ENDNETENT if endnetent() is
511 available to close whatever was being used for network queries.
513 d_endpent (d_endpent.U):
514 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
515 available to close whatever was being used for protocol queries.
517 d_endpwent (d_endpwent.U):
518 This variable conditionally defines the HAS_ENDPWENT symbol, which
519 indicates to the C program that the endpwent() routine is available
520 for sequential access of the passwd database.
522 d_endsent (d_endsent.U):
523 This variable conditionally defines HAS_ENDSERVENT if endservent() is
524 available to close whatever was being used for service queries.
526 d_eofnblk (nblock_io.U):
527 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
528 when reading from a non-blocking I/O source.
531 This variable conditionally defines the symbols EUNICE and VAX, which
532 alerts the C program that it must deal with ideosyncracies of VMS.
534 d_fchmod (d_fchmod.U):
535 This variable conditionally defines the HAS_FCHMOD symbol, which
536 indicates to the C program that the fchmod() routine is available
537 to change mode of opened files.
539 d_fchown (d_fchown.U):
540 This variable conditionally defines the HAS_FCHOWN symbol, which
541 indicates to the C program that the fchown() routine is available
542 to change ownership of opened files.
545 This variable conditionally defines the HAS_FCNTL symbol, and indicates
546 whether the fcntl() function exists
548 d_fcntl_can_lock (d_fcntl_can_lock.U):
549 This variable conditionally defines the FCNTL_CAN_LOCK symbol
550 and indicates whether file locking with fcntl() works.
552 d_fd_macros (d_fd_set.U):
553 This variable contains the eventual value of the HAS_FD_MACROS symbol,
554 which indicates if your C compiler knows about the macros which
555 manipulate an fd_set.
557 d_fd_set (d_fd_set.U):
558 This variable contains the eventual value of the HAS_FD_SET symbol,
559 which indicates if your C compiler knows about the fd_set typedef.
561 d_fds_bits (d_fd_set.U):
562 This variable contains the eventual value of the HAS_FDS_BITS symbol,
563 which indicates if your fd_set typedef contains the fds_bits member.
564 If you have an fd_set typedef, but the dweebs who installed it did
565 a half-fast job and neglected to provide the macros to manipulate
566 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
568 d_fgetpos (d_fgetpos.U):
569 This variable conditionally defines HAS_FGETPOS if fgetpos() is
570 available to get the file position indicator.
572 d_flexfnam (d_flexfnam.U):
573 This variable conditionally defines the FLEXFILENAMES symbol, which
574 indicates that the system supports filenames longer than 14 characters.
577 This variable conditionally defines HAS_FLOCK if flock() is
578 available to do file locking.
581 This variable conditionally defines the HAS_FORK symbol, which
582 indicates to the C program that the fork() routine is available.
584 d_fpathconf (d_pathconf.U):
585 This variable conditionally defines the HAS_FPATHCONF symbol, which
586 indicates to the C program that the pathconf() routine is available
587 to determine file-system related limits and options associated
588 with a given open file descriptor.
590 d_fpos64_t (d_fpos64_t.U):
591 This symbol will be defined if the C compiler supports fpos64_t.
593 d_frexpl (d_frexpl.U):
594 This variable conditionally defines the HAS_FREXPL symbol, which
595 indicates to the C program that the frexpl() routine is available.
597 d_fs_data_s (d_fs_data_s.U):
598 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
599 which indicates that the struct fs_data is supported.
601 d_fseeko (d_fseeko.U):
602 This variable conditionally defines the HAS_FSEEKO symbol, which
603 indicates to the C program that the fseeko() routine is available.
605 d_fsetpos (d_fsetpos.U):
606 This variable conditionally defines HAS_FSETPOS if fsetpos() is
607 available to set the file position indicator.
609 d_fstatfs (d_fstatfs.U):
610 This variable conditionally defines the HAS_FSTATFS symbol, which
611 indicates to the C program that the fstatfs() routine is available.
613 d_fstatvfs (d_statvfs.U):
614 This variable conditionally defines the HAS_FSTATVFS symbol, which
615 indicates to the C program that the fstatvfs() routine is available.
617 d_ftello (d_ftello.U):
618 This variable conditionally defines the HAS_FTELLO symbol, which
619 indicates to the C program that the ftello() routine is available.
622 This variable conditionally defines the HAS_FTIME symbol, which indicates
623 that the ftime() routine exists. The ftime() routine is basically
624 a sub-second accuracy clock.
626 d_Gconvert (d_gconvert.U):
627 This variable holds what Gconvert is defined as to convert
628 floating point numbers into strings. It could be 'gconvert'
629 or a more complex macro emulating gconvert with gcvt() or sprintf.
631 d_Gconvert='gconvert((x),(n),(t),(b))'
632 d_Gconvert='gcvt((x),(n),(b))'
633 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
635 d_getcwd (d_getcwd.U):
636 This variable conditionally defines the HAS_GETCWD symbol, which
637 indicates to the C program that the getcwd() routine is available
638 to get the current working directory.
640 d_getespwnam (d_getespwnam.U):
641 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
642 available to retrieve enchanced (shadow) password entries by name.
644 d_getfsstat (d_getfsstat.U):
645 This variable conditionally defines the HAS_GETFSSTAT symbol, which
646 indicates to the C program that the getfsstat() routine is available.
648 d_getgrent (d_getgrent.U):
649 This variable conditionally defines the HAS_GETGRENT symbol, which
650 indicates to the C program that the getgrent() routine is available
651 for sequential access of the group database.
653 d_getgrps (d_getgrps.U):
654 This variable conditionally defines the HAS_GETGROUPS symbol, which
655 indicates to the C program that the getgroups() routine is available
656 to get the list of process groups.
658 d_gethbyaddr (d_gethbyad.U):
659 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
660 indicates to the C program that the gethostbyaddr() routine is available
661 to look up hosts by their IP addresses.
663 d_gethbyname (d_gethbynm.U):
664 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
665 indicates to the C program that the gethostbyname() routine is available
666 to look up host names in some data base or other.
668 d_gethent (d_gethent.U):
669 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
670 available to look up host names in some data base or another.
672 d_gethname (d_gethname.U):
673 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
674 indicates to the C program that the gethostname() routine may be
675 used to derive the host name.
677 d_gethostprotos (d_gethostprotos.U):
678 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
679 which indicates to the C program that <netdb.h> supplies
680 prototypes for the various gethost*() functions.
681 See also netdbtype.U for probing for various netdb types.
683 d_getlogin (d_getlogin.U):
684 This variable conditionally defines the HAS_GETLOGIN symbol, which
685 indicates to the C program that the getlogin() routine is available
686 to get the login name.
688 d_getmnt (d_getmnt.U):
689 This variable conditionally defines the HAS_GETMNT symbol, which
690 indicates to the C program that the getmnt() routine is available
691 to retrieve one or more mount info blocks by filename.
693 d_getmntent (d_getmntent.U):
694 This variable conditionally defines the HAS_GETMNTENT symbol, which
695 indicates to the C program that the getmntent() routine is available
696 to iterate through mounted files to get their mount info.
698 d_getnbyaddr (d_getnbyad.U):
699 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
700 indicates to the C program that the getnetbyaddr() routine is available
701 to look up networks by their IP addresses.
703 d_getnbyname (d_getnbynm.U):
704 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
705 indicates to the C program that the getnetbyname() routine is available
706 to look up networks by their names.
708 d_getnent (d_getnent.U):
709 This variable conditionally defines HAS_GETNETENT if getnetent() is
710 available to look up network names in some data base or another.
712 d_getnetprotos (d_getnetprotos.U):
713 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
714 which indicates to the C program that <netdb.h> supplies
715 prototypes for the various getnet*() functions.
716 See also netdbtype.U for probing for various netdb types.
718 d_getpbyname (d_getprotby.U):
719 This variable conditionally defines the HAS_GETPROTOBYNAME
720 symbol, which indicates to the C program that the
721 getprotobyname() routine is available to look up protocols
724 d_getpbynumber (d_getprotby.U):
725 This variable conditionally defines the HAS_GETPROTOBYNUMBER
726 symbol, which indicates to the C program that the
727 getprotobynumber() routine is available to look up protocols
730 d_getpent (d_getpent.U):
731 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
732 available to look up protocols in some data base or another.
734 d_getpgid (d_getpgid.U):
735 This variable conditionally defines the HAS_GETPGID symbol, which
736 indicates to the C program that the getpgid(pid) function
737 is available to get the process group id.
739 d_getpgrp2 (d_getpgrp2.U):
740 This variable conditionally defines the HAS_GETPGRP2 symbol, which
741 indicates to the C program that the getpgrp2() (as in DG/UX) routine
742 is available to get the current process group.
744 d_getpgrp (d_getpgrp.U):
745 This variable conditionally defines HAS_GETPGRP if getpgrp() is
746 available to get the current process group.
748 d_getppid (d_getppid.U):
749 This variable conditionally defines the HAS_GETPPID symbol, which
750 indicates to the C program that the getppid() routine is available
751 to get the parent process ID.
753 d_getprior (d_getprior.U):
754 This variable conditionally defines HAS_GETPRIORITY if getpriority()
755 is available to get a process's priority.
757 d_getprotoprotos (d_getprotoprotos.U):
758 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
759 which indicates to the C program that <netdb.h> supplies
760 prototypes for the various getproto*() functions.
761 See also netdbtype.U for probing for various netdb types.
763 d_getprpwnam (d_getprpwnam.U):
764 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
765 available to retrieve protected (shadow) password entries by name.
767 d_getpwent (d_getpwent.U):
768 This variable conditionally defines the HAS_GETPWENT symbol, which
769 indicates to the C program that the getpwent() routine is available
770 for sequential access of the passwd database.
772 d_getsbyname (d_getsrvby.U):
773 This variable conditionally defines the HAS_GETSERVBYNAME
774 symbol, which indicates to the C program that the
775 getservbyname() routine is available to look up services
778 d_getsbyport (d_getsrvby.U):
779 This variable conditionally defines the HAS_GETSERVBYPORT
780 symbol, which indicates to the C program that the
781 getservbyport() routine is available to look up services
784 d_getsent (d_getsent.U):
785 This variable conditionally defines HAS_GETSERVENT if getservent() is
786 available to look up network services in some data base or another.
788 d_getservprotos (d_getservprotos.U):
789 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
790 which indicates to the C program that <netdb.h> supplies
791 prototypes for the various getserv*() functions.
792 See also netdbtype.U for probing for various netdb types.
794 d_getspnam (d_getspnam.U):
795 This variable conditionally defines HAS_GETSPNAM if getspnam() is
796 available to retrieve SysV shadow password entries by name.
798 d_gettimeod (d_ftime.U):
799 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
800 indicates that the gettimeofday() system call exists (to obtain a
801 sub-second accuracy clock). You should probably include <sys/resource.h>.
803 d_gnulibc (d_gnulibc.U):
804 Defined if we're dealing with the GNU C Library.
806 d_grpasswd (i_grp.U):
807 This variable conditionally defines GRPASSWD, which indicates
808 that struct group in <grp.h> contains gr_passwd.
810 d_hasmntopt (d_hasmntopt.U):
811 This variable conditionally defines the HAS_HASMNTOPT symbol, which
812 indicates to the C program that the hasmntopt() routine is available
813 to query the mount options of file systems.
816 This variable conditionally defines HAS_HTONL if htonl() and its
817 friends are available to do network order byte swapping.
820 This variable conditionally defines the HAS_ICONV symbol, which
821 indicates to the C program that the iconv() routine is available.
823 d_index (d_strchr.U):
824 This variable conditionally defines HAS_INDEX if index() and
825 rindex() are available for string searching.
827 d_inetaton (d_inetaton.U):
828 This variable conditionally defines the HAS_INET_ATON symbol, which
829 indicates to the C program that the inet_aton() function is available
830 to parse IP address "dotted-quad" strings.
832 d_int64_t (d_int64_t.U):
833 This symbol will be defined if the C compiler supports int64_t.
835 d_isascii (d_isascii.U):
836 This variable conditionally defines the HAS_ISASCII constant,
837 which indicates to the C program that isascii() is available.
840 This variable conditionally defines the HAS_ISNAN symbol, which
841 indicates to the C program that the isnan() routine is available.
843 d_isnanl (d_isnanl.U):
844 This variable conditionally defines the HAS_ISNANL symbol, which
845 indicates to the C program that the isnanl() routine is available.
847 d_killpg (d_killpg.U):
848 This variable conditionally defines the HAS_KILLPG symbol, which
849 indicates to the C program that the killpg() routine is available
850 to kill process groups.
852 d_lchown (d_lchown.U):
853 This variable conditionally defines the HAS_LCHOWN symbol, which
854 indicates to the C program that the lchown() routine is available
855 to operate on a symbolic link (instead of following the link).
857 d_ldbl_dig (d_ldbl_dig.U):
858 This variable conditionally defines d_ldbl_dig if this system's
859 header files provide LDBL_DIG, which is the number of significant
860 digits in a long double precision number.
863 This variable conditionally defines HAS_LINK if link() is
864 available to create hard links.
866 d_locconv (d_locconv.U):
867 This variable conditionally defines HAS_LOCALECONV if localeconv() is
868 available for numeric and monetary formatting conventions.
871 This variable conditionally defines HAS_LOCKF if lockf() is
872 available to do file locking.
874 d_longdbl (d_longdbl.U):
875 This variable conditionally defines HAS_LONG_DOUBLE if
876 the long double type is supported.
878 d_longlong (d_longlong.U):
879 This variable conditionally defines HAS_LONG_LONG if
880 the long long type is supported.
882 d_lseekproto (d_lseekproto.U):
883 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
884 which indicates to the C program that the system provides
885 a prototype for the lseek() function. Otherwise, it is
886 up to the program to supply one.
889 This variable conditionally defines HAS_LSTAT if lstat() is
890 available to do file stats on symbolic links.
892 d_madvise (d_madvise.U):
893 This variable conditionally defines HAS_MADVISE if madvise() is
894 available to map a file into memory.
897 This variable conditionally defines the HAS_MBLEN symbol, which
898 indicates to the C program that the mblen() routine is available
899 to find the number of bytes in a multibye character.
901 d_mbstowcs (d_mbstowcs.U):
902 This variable conditionally defines the HAS_MBSTOWCS symbol, which
903 indicates to the C program that the mbstowcs() routine is available
904 to convert a multibyte string into a wide character string.
906 d_mbtowc (d_mbtowc.U):
907 This variable conditionally defines the HAS_MBTOWC symbol, which
908 indicates to the C program that the mbtowc() routine is available
909 to convert multibyte to a wide character.
911 d_memchr (d_memchr.U):
912 This variable conditionally defines the HAS_MEMCHR symbol, which
913 indicates to the C program that the memchr() routine is available
914 to locate characters within a C string.
916 d_memcmp (d_memcmp.U):
917 This variable conditionally defines the HAS_MEMCMP symbol, which
918 indicates to the C program that the memcmp() routine is available
919 to compare blocks of memory.
921 d_memcpy (d_memcpy.U):
922 This variable conditionally defines the HAS_MEMCPY symbol, which
923 indicates to the C program that the memcpy() routine is available
924 to copy blocks of memory.
926 d_memmove (d_memmove.U):
927 This variable conditionally defines the HAS_MEMMOVE symbol, which
928 indicates to the C program that the memmove() routine is available
929 to copy potentatially overlapping blocks of memory.
931 d_memset (d_memset.U):
932 This variable conditionally defines the HAS_MEMSET symbol, which
933 indicates to the C program that the memset() routine is available
934 to set blocks of memory.
937 This variable conditionally defines the HAS_MKDIR symbol, which
938 indicates to the C program that the mkdir() routine is available
939 to create directories..
941 d_mkdtemp (d_mkdtemp.U):
942 This variable conditionally defines the HAS_MKDTEMP symbol, which
943 indicates to the C program that the mkdtemp() routine is available
944 to exclusively create a uniquely named temporary directory.
946 d_mkfifo (d_mkfifo.U):
947 This variable conditionally defines the HAS_MKFIFO symbol, which
948 indicates to the C program that the mkfifo() routine is available.
950 d_mkstemp (d_mkstemp.U):
951 This variable conditionally defines the HAS_MKSTEMP symbol, which
952 indicates to the C program that the mkstemp() routine is available
953 to exclusively create and open a uniquely named temporary file.
955 d_mkstemps (d_mkstemps.U):
956 This variable conditionally defines the HAS_MKSTEMPS symbol, which
957 indicates to the C program that the mkstemps() routine is available
958 to exclusively create and open a uniquely named (with a suffix)
961 d_mktime (d_mktime.U):
962 This variable conditionally defines the HAS_MKTIME symbol, which
963 indicates to the C program that the mktime() routine is available.
966 This variable conditionally defines HAS_MMAP if mmap() is
967 available to map a file into memory.
970 This variable conditionally defines the HAS_MODFL symbol, which
971 indicates to the C program that the modfl() routine is available.
973 d_mprotect (d_mprotect.U):
974 This variable conditionally defines HAS_MPROTECT if mprotect() is
975 available to modify the access protection of a memory mapped file.
978 This variable conditionally defines the HAS_MSG symbol, which
979 indicates that the entire msg*(2) library is present.
981 d_msg_ctrunc (d_socket.U):
982 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
983 which indicates that the MSG_CTRUNC is available. #ifdef is
984 not enough because it may be an enum, glibc has been known to do this.
986 d_msg_dontroute (d_socket.U):
987 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
988 which indicates that the MSG_DONTROUTE is available. #ifdef is
989 not enough because it may be an enum, glibc has been known to do this.
991 d_msg_oob (d_socket.U):
992 This variable conditionally defines the HAS_MSG_OOB symbol,
993 which indicates that the MSG_OOB is available. #ifdef is
994 not enough because it may be an enum, glibc has been known to do this.
996 d_msg_peek (d_socket.U):
997 This variable conditionally defines the HAS_MSG_PEEK symbol,
998 which indicates that the MSG_PEEK is available. #ifdef is
999 not enough because it may be an enum, glibc has been known to do this.
1001 d_msg_proxy (d_socket.U):
1002 This variable conditionally defines the HAS_MSG_PROXY symbol,
1003 which indicates that the MSG_PROXY is available. #ifdef is
1004 not enough because it may be an enum, glibc has been known to do this.
1006 d_msgctl (d_msgctl.U):
1007 This variable conditionally defines the HAS_MSGCTL symbol, which
1008 indicates to the C program that the msgctl() routine is available.
1010 d_msgget (d_msgget.U):
1011 This variable conditionally defines the HAS_MSGGET symbol, which
1012 indicates to the C program that the msgget() routine is available.
1014 d_msgrcv (d_msgrcv.U):
1015 This variable conditionally defines the HAS_MSGRCV symbol, which
1016 indicates to the C program that the msgrcv() routine is available.
1018 d_msgsnd (d_msgsnd.U):
1019 This variable conditionally defines the HAS_MSGSND symbol, which
1020 indicates to the C program that the msgsnd() routine is available.
1022 d_msync (d_msync.U):
1023 This variable conditionally defines HAS_MSYNC if msync() is
1024 available to synchronize a mapped file.
1026 d_munmap (d_munmap.U):
1027 This variable conditionally defines HAS_MUNMAP if munmap() is
1028 available to unmap a region mapped by mmap().
1030 d_mymalloc (mallocsrc.U):
1031 This variable conditionally defines MYMALLOC in case other parts
1032 of the source want to take special action if MYMALLOC is used.
1033 This may include different sorts of profiling or error detection.
1036 This variable conditionally defines the HAS_NICE symbol, which
1037 indicates to the C program that the nice() routine is available.
1039 d_nv_preserves_uv (perlxv.U):
1040 This variable indicates whether a variable of type nvtype
1041 can preserve all the bits a variable of type uvtype.
1043 d_nv_preserves_uv_bits (perlxv.U):
1044 This variable indicates how many of bits type uvtype
1045 a variable nvtype can preserve.
1047 d_off64_t (d_off64_t.U):
1048 This symbol will be defined if the C compiler supports off64_t.
1050 d_old_pthread_create_joinable (d_pthrattrj.U):
1051 This variable conditionally defines pthread_create_joinable.
1052 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1054 d_oldpthreads (usethreads.U):
1055 This variable conditionally defines the OLD_PTHREADS_API symbol,
1056 and indicates that Perl should be built to use the old
1057 draft POSIX threads API. This is only potentially meaningful if
1060 d_oldsock (d_socket.U):
1061 This variable conditionally defines the OLDSOCKET symbol, which
1062 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1064 d_open3 (d_open3.U):
1065 This variable conditionally defines the HAS_OPEN3 manifest constant,
1066 which indicates to the C program that the 3 argument version of
1067 the open(2) function is available.
1069 d_pathconf (d_pathconf.U):
1070 This variable conditionally defines the HAS_PATHCONF symbol, which
1071 indicates to the C program that the pathconf() routine is available
1072 to determine file-system related limits and options associated
1073 with a given filename.
1075 d_pause (d_pause.U):
1076 This variable conditionally defines the HAS_PAUSE symbol, which
1077 indicates to the C program that the pause() routine is available
1078 to suspend a process until a signal is received.
1080 d_perl_otherlibdirs (otherlibdirs.U):
1081 This variable conditionally defines PERL_OTHERLIBDIRS, which
1082 contains a colon-separated set of paths for the perl binary to
1083 include in @INC. See also otherlibdirs.
1085 d_phostname (d_gethname.U):
1086 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1087 contains the shell command which, when fed to popen(), may be
1088 used to derive the host name.
1091 This variable conditionally defines the HAS_PIPE symbol, which
1092 indicates to the C program that the pipe() routine is available
1093 to create an inter-process channel.
1096 This variable conditionally defines the HAS_POLL symbol, which
1097 indicates to the C program that the poll() routine is available
1098 to poll active file descriptors.
1100 d_portable (d_portable.U):
1101 This variable conditionally defines the PORTABLE symbol, which
1102 indicates to the C program that it should not assume that it is
1103 running on the machine it was compiled on.
1105 d_PRId64 (quadfio.U):
1106 This variable conditionally defines the PERL_PRId64 symbol, which
1107 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1109 d_PRIeldbl (longdblfio.U):
1110 This variable conditionally defines the PERL_PRIfldbl symbol, which
1111 indiciates that stdio has a symbol to print long doubles.
1113 d_PRIEUldbl (longdblfio.U):
1114 This variable conditionally defines the PERL_PRIfldbl symbol, which
1115 indiciates that stdio has a symbol to print long doubles.
1116 The 'U' in the name is to separate this from d_PRIeldbl so that even
1117 case-blind systems can see the difference.
1119 d_PRIfldbl (longdblfio.U):
1120 This variable conditionally defines the PERL_PRIfldbl symbol, which
1121 indiciates that stdio has a symbol to print long doubles.
1123 d_PRIFUldbl (longdblfio.U):
1124 This variable conditionally defines the PERL_PRIfldbl symbol, which
1125 indiciates that stdio has a symbol to print long doubles.
1126 The 'U' in the name is to separate this from d_PRIfldbl so that even
1127 case-blind systems can see the difference.
1129 d_PRIgldbl (longdblfio.U):
1130 This variable conditionally defines the PERL_PRIfldbl symbol, which
1131 indiciates that stdio has a symbol to print long doubles.
1133 d_PRIGUldbl (longdblfio.U):
1134 This variable conditionally defines the PERL_PRIfldbl symbol, which
1135 indiciates that stdio has a symbol to print long doubles.
1136 The 'U' in the name is to separate this from d_PRIgldbl so that even
1137 case-blind systems can see the difference.
1139 d_PRIi64 (quadfio.U):
1140 This variable conditionally defines the PERL_PRIi64 symbol, which
1141 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1143 d_PRIo64 (quadfio.U):
1144 This variable conditionally defines the PERL_PRIo64 symbol, which
1145 indiciates that stdio has a symbol to print 64-bit octal numbers.
1147 d_PRIu64 (quadfio.U):
1148 This variable conditionally defines the PERL_PRIu64 symbol, which
1149 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1152 d_PRIx64 (quadfio.U):
1153 This variable conditionally defines the PERL_PRIx64 symbol, which
1154 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1156 d_PRIXU64 (quadfio.U):
1157 This variable conditionally defines the PERL_PRIXU64 symbol, which
1158 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1159 The 'U' in the name is to separate this from d_PRIx64 so that even
1160 case-blind systems can see the difference.
1162 d_pthread_yield (d_pthread_y.U):
1163 This variable conditionally defines the HAS_PTHREAD_YIELD
1164 symbol if the pthread_yield routine is available to yield
1165 the execution of the current thread.
1168 This variable conditionally defines PWAGE, which indicates
1169 that struct passwd contains pw_age.
1171 d_pwchange (i_pwd.U):
1172 This variable conditionally defines PWCHANGE, which indicates
1173 that struct passwd contains pw_change.
1175 d_pwclass (i_pwd.U):
1176 This variable conditionally defines PWCLASS, which indicates
1177 that struct passwd contains pw_class.
1179 d_pwcomment (i_pwd.U):
1180 This variable conditionally defines PWCOMMENT, which indicates
1181 that struct passwd contains pw_comment.
1183 d_pwexpire (i_pwd.U):
1184 This variable conditionally defines PWEXPIRE, which indicates
1185 that struct passwd contains pw_expire.
1187 d_pwgecos (i_pwd.U):
1188 This variable conditionally defines PWGECOS, which indicates
1189 that struct passwd contains pw_gecos.
1191 d_pwpasswd (i_pwd.U):
1192 This variable conditionally defines PWPASSWD, which indicates
1193 that struct passwd contains pw_passwd.
1195 d_pwquota (i_pwd.U):
1196 This variable conditionally defines PWQUOTA, which indicates
1197 that struct passwd contains pw_quota.
1199 d_qgcvt (d_qgcvt.U):
1200 This variable conditionally defines the HAS_QGCVT symbol, which
1201 indicates to the C program that the qgcvt() routine is available.
1203 d_quad (quadtype.U):
1204 This variable, if defined, tells that there's a 64-bit integer type,
1207 d_readdir (d_readdir.U):
1208 This variable conditionally defines HAS_READDIR if readdir() is
1209 available to read directory entries.
1211 d_readlink (d_readlink.U):
1212 This variable conditionally defines the HAS_READLINK symbol, which
1213 indicates to the C program that the readlink() routine is available
1214 to read the value of a symbolic link.
1216 d_rename (d_rename.U):
1217 This variable conditionally defines the HAS_RENAME symbol, which
1218 indicates to the C program that the rename() routine is available
1221 d_rewinddir (d_readdir.U):
1222 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1225 d_rmdir (d_rmdir.U):
1226 This variable conditionally defines HAS_RMDIR if rmdir() is
1227 available to remove directories.
1229 d_safebcpy (d_safebcpy.U):
1230 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1231 the bcopy() routine can do overlapping copies.
1233 d_safemcpy (d_safemcpy.U):
1234 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1235 the memcpy() routine can do overlapping copies.
1237 d_sanemcmp (d_sanemcmp.U):
1238 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1239 the memcpy() routine is available and can be used to compare relative
1240 magnitudes of chars with their high bits set.
1242 d_sched_yield (d_pthread_y.U):
1243 This variable conditionally defines the HAS_SCHED_YIELD
1244 symbol if the sched_yield routine is available to yield
1245 the execution of the current thread.
1247 d_scm_rights (d_socket.U):
1248 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1249 which indicates that the SCM_RIGHTS is available. #ifdef is
1250 not enough because it may be an enum, glibc has been known to do this.
1252 d_SCNfldbl (longdblfio.U):
1253 This variable conditionally defines the PERL_PRIfldbl symbol, which
1254 indiciates that stdio has a symbol to scan long doubles.
1256 d_seekdir (d_readdir.U):
1257 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1260 d_select (d_select.U):
1261 This variable conditionally defines HAS_SELECT if select() is
1262 available to select active file descriptors. A <sys/time.h>
1263 inclusion may be necessary for the timeout field.
1266 This variable conditionally defines the HAS_SEM symbol, which
1267 indicates that the entire sem*(2) library is present.
1269 d_semctl (d_semctl.U):
1270 This variable conditionally defines the HAS_SEMCTL symbol, which
1271 indicates to the C program that the semctl() routine is available.
1273 d_semctl_semid_ds (d_union_semun.U):
1274 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1275 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1277 d_semctl_semun (d_union_semun.U):
1278 This variable conditionally defines USE_SEMCTL_SEMUN, which
1279 indicates that union semun is to be used for semctl IPC_STAT.
1281 d_semget (d_semget.U):
1282 This variable conditionally defines the HAS_SEMGET symbol, which
1283 indicates to the C program that the semget() routine is available.
1285 d_semop (d_semop.U):
1286 This variable conditionally defines the HAS_SEMOP symbol, which
1287 indicates to the C program that the semop() routine is available.
1289 d_setegid (d_setegid.U):
1290 This variable conditionally defines the HAS_SETEGID symbol, which
1291 indicates to the C program that the setegid() routine is available
1292 to change the effective gid of the current program.
1294 d_seteuid (d_seteuid.U):
1295 This variable conditionally defines the HAS_SETEUID symbol, which
1296 indicates to the C program that the seteuid() routine is available
1297 to change the effective uid of the current program.
1299 d_setgrent (d_setgrent.U):
1300 This variable conditionally defines the HAS_SETGRENT symbol, which
1301 indicates to the C program that the setgrent() routine is available
1302 for initializing sequential access to the group database.
1304 d_setgrps (d_setgrps.U):
1305 This variable conditionally defines the HAS_SETGROUPS symbol, which
1306 indicates to the C program that the setgroups() routine is available
1307 to set the list of process groups.
1309 d_sethent (d_sethent.U):
1310 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1313 d_setlinebuf (d_setlnbuf.U):
1314 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1315 indicates to the C program that the setlinebuf() routine is available
1316 to change stderr or stdout from block-buffered or unbuffered to a
1319 d_setlocale (d_setlocale.U):
1320 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1321 available to handle locale-specific ctype implementations.
1323 d_setnent (d_setnent.U):
1324 This variable conditionally defines HAS_SETNETENT if setnetent() is
1327 d_setpent (d_setpent.U):
1328 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1331 d_setpgid (d_setpgid.U):
1332 This variable conditionally defines the HAS_SETPGID symbol if the
1333 setpgid(pid, gpid) function is available to set process group ID.
1335 d_setpgrp2 (d_setpgrp2.U):
1336 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1337 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1338 is available to set the current process group.
1340 d_setpgrp (d_setpgrp.U):
1341 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1342 available to set the current process group.
1344 d_setprior (d_setprior.U):
1345 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1346 is available to set a process's priority.
1348 d_setproctitle (d_setproctitle.U):
1349 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1350 which indicates to the C program that the setproctitle() routine
1353 d_setpwent (d_setpwent.U):
1354 This variable conditionally defines the HAS_SETPWENT symbol, which
1355 indicates to the C program that the setpwent() routine is available
1356 for initializing sequential access to the passwd database.
1358 d_setregid (d_setregid.U):
1359 This variable conditionally defines HAS_SETREGID if setregid() is
1360 available to change the real and effective gid of the current
1363 d_setresgid (d_setregid.U):
1364 This variable conditionally defines HAS_SETRESGID if setresgid() is
1365 available to change the real, effective and saved gid of the current
1368 d_setresuid (d_setreuid.U):
1369 This variable conditionally defines HAS_SETREUID if setresuid() is
1370 available to change the real, effective and saved uid of the current
1373 d_setreuid (d_setreuid.U):
1374 This variable conditionally defines HAS_SETREUID if setreuid() is
1375 available to change the real and effective uid of the current
1378 d_setrgid (d_setrgid.U):
1379 This variable conditionally defines the HAS_SETRGID symbol, which
1380 indicates to the C program that the setrgid() routine is available
1381 to change the real gid of the current program.
1383 d_setruid (d_setruid.U):
1384 This variable conditionally defines the HAS_SETRUID symbol, which
1385 indicates to the C program that the setruid() routine is available
1386 to change the real uid of the current program.
1388 d_setsent (d_setsent.U):
1389 This variable conditionally defines HAS_SETSERVENT if setservent() is
1392 d_setsid (d_setsid.U):
1393 This variable conditionally defines HAS_SETSID if setsid() is
1394 available to set the process group ID.
1396 d_setvbuf (d_setvbuf.U):
1397 This variable conditionally defines the HAS_SETVBUF symbol, which
1398 indicates to the C program that the setvbuf() routine is available
1399 to change buffering on an open stdio stream.
1402 This variable conditionally defines the USE_SFIO symbol,
1403 and indicates whether sfio is available (and should be used).
1406 This variable conditionally defines the HAS_SHM symbol, which
1407 indicates that the entire shm*(2) library is present.
1409 d_shmat (d_shmat.U):
1410 This variable conditionally defines the HAS_SHMAT symbol, which
1411 indicates to the C program that the shmat() routine is available.
1413 d_shmatprototype (d_shmat.U):
1414 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1415 symbol, which indicates that sys/shm.h has a prototype for
1418 d_shmctl (d_shmctl.U):
1419 This variable conditionally defines the HAS_SHMCTL symbol, which
1420 indicates to the C program that the shmctl() routine is available.
1422 d_shmdt (d_shmdt.U):
1423 This variable conditionally defines the HAS_SHMDT symbol, which
1424 indicates to the C program that the shmdt() routine is available.
1426 d_shmget (d_shmget.U):
1427 This variable conditionally defines the HAS_SHMGET symbol, which
1428 indicates to the C program that the shmget() routine is available.
1430 d_sigaction (d_sigaction.U):
1431 This variable conditionally defines the HAS_SIGACTION symbol, which
1432 indicates that the Vr4 sigaction() routine is available.
1434 d_sigsetjmp (d_sigsetjmp.U):
1435 This variable conditionally defines the HAS_SIGSETJMP symbol,
1436 which indicates that the sigsetjmp() routine is available to
1437 call setjmp() and optionally save the process's signal mask.
1439 d_socket (d_socket.U):
1440 This variable conditionally defines HAS_SOCKET, which indicates
1441 that the BSD socket interface is supported.
1443 d_socklen_t (d_socklen_t.U):
1444 This symbol will be defined if the C compiler supports socklen_t.
1446 d_sockpair (d_socket.U):
1447 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1448 indicates that the BSD socketpair() is supported.
1450 d_socks5_init (d_socks5_init.U):
1451 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1452 indicates to the C program that the socks5_init() routine is available.
1454 d_sqrtl (d_sqrtl.U):
1455 This variable conditionally defines the HAS_SQRTL symbol, which
1456 indicates to the C program that the sqrtl() routine is available.
1458 d_statblks (d_statblks.U):
1459 This variable conditionally defines USE_STAT_BLOCKS
1460 if this system has a stat structure declaring
1461 st_blksize and st_blocks.
1463 d_statfs_f_flags (d_statfs_f_flags.U):
1464 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1465 symbol, which indicates to struct statfs from has f_flags member.
1466 This kind of struct statfs is coming from sys/mount.h (BSD),
1467 not from sys/statfs.h (SYSV).
1469 d_statfs_s (d_statfs_s.U):
1470 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1471 which indicates that the struct statfs is supported.
1473 d_statvfs (d_statvfs.U):
1474 This variable conditionally defines the HAS_STATVFS symbol, which
1475 indicates to the C program that the statvfs() routine is available.
1477 d_stdio_cnt_lval (d_stdstdio.U):
1478 This variable conditionally defines STDIO_CNT_LVALUE if the
1479 FILE_cnt macro can be used as an lvalue.
1481 d_stdio_ptr_lval (d_stdstdio.U):
1482 This variable conditionally defines STDIO_PTR_LVALUE if the
1483 FILE_ptr macro can be used as an lvalue.
1485 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1486 This symbol is defined if using the FILE_ptr macro as an lvalue
1487 to increase the pointer by n leaves File_cnt(fp) unchanged.
1489 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1490 This symbol is defined if using the FILE_ptr macro as an lvalue
1491 to increase the pointer by n has the side effect of decreasing the
1492 value of File_cnt(fp) by n.
1494 d_stdio_stream_array (stdio_streams.U):
1495 This variable tells whether there is an array holding
1498 d_stdiobase (d_stdstdio.U):
1499 This variable conditionally defines USE_STDIO_BASE if this system
1500 has a FILE structure declaring a usable _base field (or equivalent)
1503 d_stdstdio (d_stdstdio.U):
1504 This variable conditionally defines USE_STDIO_PTR if this system
1505 has a FILE structure declaring usable _ptr and _cnt fields (or
1506 equivalent) in stdio.h.
1508 d_strchr (d_strchr.U):
1509 This variable conditionally defines HAS_STRCHR if strchr() and
1510 strrchr() are available for string searching.
1512 d_strcoll (d_strcoll.U):
1513 This variable conditionally defines HAS_STRCOLL if strcoll() is
1514 available to compare strings using collating information.
1516 d_strctcpy (d_strctcpy.U):
1517 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1518 indicates to the C program that this C compiler knows how to copy
1521 d_strerrm (d_strerror.U):
1522 This variable holds what Strerrr is defined as to translate an error
1523 code condition into an error message string. It could be 'strerror'
1524 or a more complex macro emulating strrror with sys_errlist[], or the
1525 "unknown" string when both strerror and sys_errlist are missing.
1527 d_strerror (d_strerror.U):
1528 This variable conditionally defines HAS_STRERROR if strerror() is
1529 available to translate error numbers to strings.
1531 d_strtod (d_strtod.U):
1532 This variable conditionally defines the HAS_STRTOD symbol, which
1533 indicates to the C program that the strtod() routine is available
1534 to provide better numeric string conversion than atof().
1536 d_strtol (d_strtol.U):
1537 This variable conditionally defines the HAS_STRTOL symbol, which
1538 indicates to the C program that the strtol() routine is available
1539 to provide better numeric string conversion than atoi() and friends.
1541 d_strtold (d_strtold.U):
1542 This variable conditionally defines the HAS_STRTOLD symbol, which
1543 indicates to the C program that the strtold() routine is available.
1545 d_strtoll (d_strtoll.U):
1546 This variable conditionally defines the HAS_STRTOLL symbol, which
1547 indicates to the C program that the strtoll() routine is available.
1549 d_strtoul (d_strtoul.U):
1550 This variable conditionally defines the HAS_STRTOUL symbol, which
1551 indicates to the C program that the strtoul() routine is available
1552 to provide conversion of strings to unsigned long.
1554 d_strtoull (d_strtoull.U):
1555 This variable conditionally defines the HAS_STRTOULL symbol, which
1556 indicates to the C program that the strtoull() routine is available.
1558 d_strtouq (d_strtouq.U):
1559 This variable conditionally defines the HAS_STRTOUQ symbol, which
1560 indicates to the C program that the strtouq() routine is available.
1562 d_strxfrm (d_strxfrm.U):
1563 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1564 available to transform strings.
1566 d_suidsafe (d_dosuid.U):
1567 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1568 if setuid scripts can be secure. This test looks in /dev/fd/.
1570 d_symlink (d_symlink.U):
1571 This variable conditionally defines the HAS_SYMLINK symbol, which
1572 indicates to the C program that the symlink() routine is available
1573 to create symbolic links.
1575 d_syscall (d_syscall.U):
1576 This variable conditionally defines HAS_SYSCALL if syscall() is
1577 available call arbitrary system calls.
1579 d_sysconf (d_sysconf.U):
1580 This variable conditionally defines the HAS_SYSCONF symbol, which
1581 indicates to the C program that the sysconf() routine is available
1582 to determine system related limits and options.
1584 d_sysernlst (d_strerror.U):
1585 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1586 is available to translate error numbers to the symbolic name.
1588 d_syserrlst (d_strerror.U):
1589 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1590 available to translate error numbers to strings.
1592 d_system (d_system.U):
1593 This variable conditionally defines HAS_SYSTEM if system() is
1594 available to issue a shell command.
1596 d_tcgetpgrp (d_tcgtpgrp.U):
1597 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1598 indicates to the C program that the tcgetpgrp() routine is available.
1599 to get foreground process group ID.
1601 d_tcsetpgrp (d_tcstpgrp.U):
1602 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1603 indicates to the C program that the tcsetpgrp() routine is available
1604 to set foreground process group ID.
1606 d_telldir (d_readdir.U):
1607 This variable conditionally defines HAS_TELLDIR if telldir() is
1610 d_telldirproto (d_telldirproto.U):
1611 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1612 which indicates to the C program that the system provides
1613 a prototype for the telldir() function. Otherwise, it is
1614 up to the program to supply one.
1617 This variable conditionally defines the HAS_TIME symbol, which indicates
1618 that the time() routine exists. The time() routine is normaly
1619 provided on UNIX systems.
1621 d_times (d_times.U):
1622 This variable conditionally defines the HAS_TIMES symbol, which indicates
1623 that the times() routine exists. The times() routine is normaly
1624 provided on UNIX systems. You may have to include <sys/times.h>.
1626 d_truncate (d_truncate.U):
1627 This variable conditionally defines HAS_TRUNCATE if truncate() is
1628 available to truncate files.
1630 d_tzname (d_tzname.U):
1631 This variable conditionally defines HAS_TZNAME if tzname[] is
1632 available to access timezone names.
1634 d_umask (d_umask.U):
1635 This variable conditionally defines the HAS_UMASK symbol, which
1636 indicates to the C program that the umask() routine is available.
1637 to set and get the value of the file creation mask.
1639 d_uname (d_gethname.U):
1640 This variable conditionally defines the HAS_UNAME symbol, which
1641 indicates to the C program that the uname() routine may be
1642 used to derive the host name.
1644 d_union_semun (d_union_semun.U):
1645 This variable conditionally defines HAS_UNION_SEMUN if the
1646 union semun is defined by including <sys/sem.h>.
1648 d_ustat (d_ustat.U):
1649 This variable conditionally defines HAS_USTAT if ustat() is
1650 available to query file system statistics by dev_t.
1652 d_vendorarch (vendorarch.U):
1653 This variable conditionally defined PERL_VENDORARCH.
1655 d_vendorbin (vendorbin.U):
1656 This variable conditionally defines PERL_VENDORBIN.
1658 d_vendorlib (vendorlib.U):
1659 This variable conditionally defines PERL_VENDORLIB.
1661 d_vfork (d_vfork.U):
1662 This variable conditionally defines the HAS_VFORK symbol, which
1663 indicates the vfork() routine is available.
1665 d_void_closedir (d_closedir.U):
1666 This variable conditionally defines VOID_CLOSEDIR if closedir()
1667 does not return a value.
1669 d_voidsig (d_voidsig.U):
1670 This variable conditionally defines VOIDSIG if this system
1671 declares "void (*signal(...))()" in signal.h. The old way was to
1672 declare it as "int (*signal(...))()".
1674 d_voidtty (i_sysioctl.U):
1675 This variable conditionally defines USE_IOCNOTTY to indicate that the
1676 ioctl() call with TIOCNOTTY should be used to void tty association.
1677 Otherwise (on USG probably), it is enough to close the standard file
1678 decriptors and do a setpgrp().
1680 d_volatile (d_volatile.U):
1681 This variable conditionally defines the HASVOLATILE symbol, which
1682 indicates to the C program that this C compiler knows about the
1683 volatile declaration.
1685 d_vprintf (d_vprintf.U):
1686 This variable conditionally defines the HAS_VPRINTF symbol, which
1687 indicates to the C program that the vprintf() routine is available
1688 to printf with a pointer to an argument list.
1690 d_wait4 (d_wait4.U):
1691 This variable conditionally defines the HAS_WAIT4 symbol, which
1692 indicates the wait4() routine is available.
1694 d_waitpid (d_waitpid.U):
1695 This variable conditionally defines HAS_WAITPID if waitpid() is
1696 available to wait for child process.
1698 d_wcstombs (d_wcstombs.U):
1699 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1700 indicates to the C program that the wcstombs() routine is available
1701 to convert wide character strings to multibyte strings.
1703 d_wctomb (d_wctomb.U):
1704 This variable conditionally defines the HAS_WCTOMB symbol, which
1705 indicates to the C program that the wctomb() routine is available
1706 to convert a wide character to a multibyte.
1709 This variable conditionally defines the symbol XENIX, which alerts
1710 the C program that it runs under Xenix.
1713 This variable is used internally by Configure to determine the
1714 full pathname (if any) of the date program. After Configure runs,
1715 the value is reset to a plain "date" and is not useful.
1717 db_hashtype (i_db.U):
1718 This variable contains the type of the hash structure element
1719 in the <db.h> header file. In older versions of DB, it was
1720 int, while in newer ones it is u_int32_t.
1722 db_prefixtype (i_db.U):
1723 This variable contains the type of the prefix structure element
1724 in the <db.h> header file. In older versions of DB, it was
1725 int, while in newer ones it is size_t.
1727 defvoidused (voidflags.U):
1728 This variable contains the default value of the VOIDUSED symbol (15).
1730 direntrytype (i_dirent.U):
1731 This symbol is set to 'struct direct' or 'struct dirent' depending on
1732 whether dirent is available or not. You should use this pseudo type to
1733 portably declare your directory entries.
1736 This variable contains the extension that is to be used for the
1737 dynamically loaded modules that perl generaties.
1740 This variable contains the name of the dynamic loading file that
1741 will be used with the package.
1743 doublesize (doublesize.U):
1744 This variable contains the value of the DOUBLESIZE symbol, which
1745 indicates to the C program how many bytes there are in a double.
1747 drand01 (randfunc.U):
1748 Indicates the macro to be used to generate normalized
1749 random numbers. Uses randfunc, often divided by
1750 (double) (((unsigned long) 1 << randbits)) in order to
1751 normalize the result.
1752 In C programs, the macro 'Drand01' is mapped to drand01.
1754 dynamic_ext (Extensions.U):
1755 This variable holds a list of XS extension files we want to
1756 link dynamically into the package. It is used by Makefile.
1758 eagain (nblock_io.U):
1759 This variable bears the symbolic errno code set by read() when no
1760 data is present on the file and non-blocking I/O was enabled (otherwise,
1761 read() blocks naturally).
1764 This variable conditionally defines EBCDIC if this
1765 system uses EBCDIC encoding. Among other things, this
1766 means that the character ranges are not contiguous.
1770 This variable is used internally by Configure to determine the
1771 full pathname (if any) of the echo program. After Configure runs,
1772 the value is reset to a plain "echo" and is not useful.
1775 This variable is used internally by Configure to determine the
1776 full pathname (if any) of the egrep program. After Configure runs,
1777 the value is reset to a plain "egrep" and is not useful.
1780 This variable is defined but not used by Configure.
1781 The value is a plain '' and is not useful.
1784 When running under Eunice this variable contains a command which will
1785 convert a shell script to the proper form of text file for it to be
1786 executable by the shell. On other systems it is a no-op.
1789 This is an old synonym for _exe.
1792 This variable is used internally by Configure to determine the
1793 full pathname (if any) of the expr program. After Configure runs,
1794 the value is reset to a plain "expr" and is not useful.
1796 extensions (Extensions.U):
1797 This variable holds a list of all extension files (both XS and
1798 non-xs linked into the package. It is propagated to Config.pm
1799 and is typically used to test whether a particular extesion
1802 fflushall (fflushall.U):
1803 This symbol, if defined, tells that to flush
1804 all pending stdio output one must loop through all
1805 the stdio file handles stored in an array and fflush them.
1806 Note that if fflushNULL is defined, fflushall will not
1807 even be probed for and will be left undefined.
1809 fflushNULL (fflushall.U):
1810 This symbol, if defined, tells that fflush(NULL) does flush
1811 all pending stdio output.
1814 This variable is defined but not used by Configure.
1815 The value is a plain '' and is not useful.
1817 firstmakefile (Unix.U):
1818 This variable defines the first file searched by make. On unix,
1819 it is makefile (then Makefile). On case-insensitive systems,
1820 it might be something else. This is only used to deal with
1821 convoluted make depend tricks.
1824 This variable is defined but not used by Configure.
1825 The value is a plain '' and is not useful.
1827 fpossize (fpossize.U):
1828 This variable contains the size of a fpostype in bytes.
1830 fpostype (fpostype.U):
1831 This variable defines Fpos_t to be something like fpos_t, long,
1832 uint, or whatever type is used to declare file positions in libc.
1834 freetype (mallocsrc.U):
1835 This variable contains the return type of free(). It is usually
1836 void, but occasionally int.
1839 This variable contains the full pathname to 'ar', whether or
1840 not the user has specified 'portability'. This is only used
1844 This variable contains the full pathname to 'csh', whether or
1845 not the user has specified 'portability'. This is only used
1846 in the compiled C program, and we assume that all systems which
1847 can share this executable will have the same full pathname to
1850 full_sed (Loc_sed.U):
1851 This variable contains the full pathname to 'sed', whether or
1852 not the user has specified 'portability'. This is only used
1853 in the compiled C program, and we assume that all systems which
1854 can share this executable will have the same full pathname to
1857 gccosandvers (gccvers.U):
1858 If GNU cc (gcc) is used, this variable the operating system and
1859 version used to compile the gcc. It is set to '' if not gcc,
1860 or if nothing useful can be parsed as the os version.
1862 gccversion (gccvers.U):
1863 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1864 indicate whether the compiler is version 1 or 2. This is used in
1865 setting some of the default cflags. It is set to '' if not gcc.
1868 This variable contains the format string used for printing a Gid_t.
1870 gidsign (gidsign.U):
1871 This variable contains the signedness of a gidtype.
1872 1 for unsigned, -1 for signed.
1874 gidsize (gidsize.U):
1875 This variable contains the size of a gidtype in bytes.
1877 gidtype (gidtype.U):
1878 This variable defines Gid_t to be something like gid_t, int,
1879 ushort, or whatever type is used to declare the return type
1880 of getgid(). Typically, it is the type of group ids in the kernel.
1883 This variable holds the general path (space-separated) used to
1884 find libraries. It may contain directories that do not exist on
1885 this platform, libpth is the cleaned-up version.
1888 This variable is used internally by Configure to determine the
1889 full pathname (if any) of the grep program. After Configure runs,
1890 the value is reset to a plain "grep" and is not useful.
1893 This variable contains a command that produces the text of the
1894 /etc/group file. This is normally "cat /etc/group", but can be
1895 "ypcat group" when NIS is used.
1896 On some systems, such as os390, there may be no equivalent
1897 command, in which case this variable is unset.
1899 groupstype (groupstype.U):
1900 This variable defines Groups_t to be something like gid_t, int,
1901 ushort, or whatever type is used for the second argument to
1902 getgroups() and setgroups(). Usually, this is the same as
1903 gidtype (gid_t), but sometimes it isn't.
1906 This variable is used internally by Configure to determine the
1907 full pathname (if any) of the gzip program. After Configure runs,
1908 the value is reset to a plain "gzip" and is not useful.
1910 h_fcntl (h_fcntl.U):
1911 This is variable gets set in various places to tell i_fcntl that
1912 <fcntl.h> should be included.
1914 h_sysfile (h_sysfile.U):
1915 This is variable gets set in various places to tell i_sys_file that
1916 <sys/file.h> should be included.
1919 Gives the type of hints used for previous answers. May be one of
1920 "default", "recommended" or "previous".
1923 This variable contains a command that produces the text of the
1924 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1925 "ypcat hosts" when NIS is used.
1926 On some systems, such as os390, there may be no equivalent
1927 command, in which case this variable is unset.
1930 This variable is the size of an I16 in bytes.
1933 This variable contains the C type used for Perl's I16.
1936 This variable is the size of an I32 in bytes.
1939 This variable contains the C type used for Perl's I32.
1942 This variable is the size of an I64 in bytes.
1945 This variable contains the C type used for Perl's I64.
1948 This variable is the size of an I8 in bytes.
1951 This variable contains the C type used for Perl's I8.
1953 i_arpainet (i_arpainet.U):
1954 This variable conditionally defines the I_ARPA_INET symbol,
1955 and indicates whether a C program should include <arpa/inet.h>.
1957 i_bsdioctl (i_sysioctl.U):
1958 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1959 indicates to the C program that <sys/bsdioctl.h> exists and should
1963 This variable conditionally defines the I_DB symbol, and indicates
1964 whether a C program may include Berkeley's DB include file <db.h>.
1967 This variable conditionally defines the I_DBM symbol, which
1968 indicates to the C program that <dbm.h> exists and should
1971 i_dirent (i_dirent.U):
1972 This variable conditionally defines I_DIRENT, which indicates
1973 to the C program that it should include <dirent.h>.
1976 This variable conditionally defines the I_DLD symbol, which
1977 indicates to the C program that <dld.h> (GNU dynamic loading)
1978 exists and should be included.
1980 i_dlfcn (i_dlfcn.U):
1981 This variable conditionally defines the I_DLFCN symbol, which
1982 indicates to the C program that <dlfcn.h> exists and should
1985 i_fcntl (i_fcntl.U):
1986 This variable controls the value of I_FCNTL (which tells
1987 the C program to include <fcntl.h>).
1989 i_float (i_float.U):
1990 This variable conditionally defines the I_FLOAT symbol, and indicates
1991 whether a C program may include <float.h> to get symbols like DBL_MAX
1992 or DBL_MIN, i.e. machine dependent floating point values.
1995 This variable conditionally defines the I_GDBM symbol, which
1996 indicates to the C program that <gdbm.h> exists and should
2000 This variable conditionally defines the I_GRP symbol, and indicates
2001 whether a C program should include <grp.h>.
2003 i_iconv (i_iconv.U):
2004 This variable conditionally defines the I_ICONV symbol, and indicates
2005 whether a C program should include <iconv.h>.
2007 i_ieeefp (i_ieeefp.U):
2008 This variable conditionally defines the I_IEEEFP symbol, and indicates
2009 whether a C program should include <ieeefp.h>.
2011 i_inttypes (i_inttypes.U):
2012 This variable conditionally defines the I_INTTYPES symbol,
2013 and indicates whether a C program should include <inttypes.h>.
2015 i_libutil (i_libutil.U):
2016 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2017 whether a C program should include <libutil.h>.
2019 i_limits (i_limits.U):
2020 This variable conditionally defines the I_LIMITS symbol, and indicates
2021 whether a C program may include <limits.h> to get symbols like WORD_BIT
2024 i_locale (i_locale.U):
2025 This variable conditionally defines the I_LOCALE symbol,
2026 and indicates whether a C program should include <locale.h>.
2028 i_machcthr (i_machcthr.U):
2029 This variable conditionally defines the I_MACH_CTHREADS symbol,
2030 and indicates whether a C program should include <mach/cthreads.h>.
2032 i_malloc (i_malloc.U):
2033 This variable conditionally defines the I_MALLOC symbol, and indicates
2034 whether a C program should include <malloc.h>.
2037 This variable conditionally defines the I_MATH symbol, and indicates
2038 whether a C program may include <math.h>.
2040 i_memory (i_memory.U):
2041 This variable conditionally defines the I_MEMORY symbol, and indicates
2042 whether a C program should include <memory.h>.
2044 i_mntent (i_mntent.U):
2045 This variable conditionally defines the I_MNTENT symbol, and indicates
2046 whether a C program should include <mntent.h>.
2049 This variable conditionally defines the I_NDBM symbol, which
2050 indicates to the C program that <ndbm.h> exists and should
2053 i_netdb (i_netdb.U):
2054 This variable conditionally defines the I_NETDB symbol, and indicates
2055 whether a C program should include <netdb.h>.
2057 i_neterrno (i_neterrno.U):
2058 This variable conditionally defines the I_NET_ERRNO symbol, which
2059 indicates to the C program that <net/errno.h> exists and should
2062 i_netinettcp (i_netinettcp.U):
2063 This variable conditionally defines the I_NETINET_TCP symbol,
2064 and indicates whether a C program should include <netinet/tcp.h>.
2067 This variable conditionally defines I_NETINET_IN, which indicates
2068 to the C program that it should include <netinet/in.h>. Otherwise,
2069 you may try <sys/in.h>.
2072 This variable conditionally defines the I_POLL symbol, and indicates
2073 whether a C program should include <poll.h>.
2076 This variable conditionally defines the I_PROT symbol, and indicates
2077 whether a C program should include <prot.h>.
2079 i_pthread (i_pthread.U):
2080 This variable conditionally defines the I_PTHREAD symbol,
2081 and indicates whether a C program should include <pthread.h>.
2084 This variable conditionally defines I_PWD, which indicates
2085 to the C program that it should include <pwd.h>.
2087 i_rpcsvcdbm (i_dbm.U):
2088 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2089 indicates to the C program that <rpcsvc/dbm.h> exists and should
2090 be included. Some System V systems might need this instead of <dbm.h>.
2093 This variable conditionally defines the I_SFIO symbol,
2094 and indicates whether a C program should include <sfio.h>.
2096 i_sgtty (i_termio.U):
2097 This variable conditionally defines the I_SGTTY symbol, which
2098 indicates to the C program that it should include <sgtty.h> rather
2101 i_shadow (i_shadow.U):
2102 This variable conditionally defines the I_SHADOW symbol, and indicates
2103 whether a C program should include <shadow.h>.
2105 i_socks (i_socks.U):
2106 This variable conditionally defines the I_SOCKS symbol, and indicates
2107 whether a C program should include <socks.h>.
2109 i_stdarg (i_varhdr.U):
2110 This variable conditionally defines the I_STDARG symbol, which
2111 indicates to the C program that <stdarg.h> exists and should
2114 i_stddef (i_stddef.U):
2115 This variable conditionally defines the I_STDDEF symbol, which
2116 indicates to the C program that <stddef.h> exists and should
2119 i_stdlib (i_stdlib.U):
2120 This variable conditionally defines the I_STDLIB symbol, which
2121 indicates to the C program that <stdlib.h> exists and should
2124 i_string (i_string.U):
2125 This variable conditionally defines the I_STRING symbol, which
2126 indicates that <string.h> should be included rather than <strings.h>.
2128 i_sunmath (i_sunmath.U):
2129 This variable conditionally defines the I_SUNMATH symbol, and indicates
2130 whether a C program should include <sunmath.h>.
2132 i_sysaccess (i_sysaccess.U):
2133 This variable conditionally defines the I_SYS_ACCESS symbol,
2134 and indicates whether a C program should include <sys/access.h>.
2136 i_sysdir (i_sysdir.U):
2137 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2138 whether a C program should include <sys/dir.h>.
2140 i_sysfile (i_sysfile.U):
2141 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2142 whether a C program should include <sys/file.h> to get R_OK and friends.
2144 i_sysfilio (i_sysioctl.U):
2145 This variable conditionally defines the I_SYS_FILIO symbol, which
2146 indicates to the C program that <sys/filio.h> exists and should
2147 be included in preference to <sys/ioctl.h>.
2150 This variable conditionally defines I_SYS_IN, which indicates
2151 to the C program that it should include <sys/in.h> instead of
2154 i_sysioctl (i_sysioctl.U):
2155 This variable conditionally defines the I_SYS_IOCTL symbol, which
2156 indicates to the C program that <sys/ioctl.h> exists and should
2159 i_syslog (i_syslog.U):
2160 This variable conditionally defines the I_SYSLOG symbol,
2161 and indicates whether a C program should include <syslog.h>.
2163 i_sysmman (i_sysmman.U):
2164 This variable conditionally defines the I_SYS_MMAN symbol, and
2165 indicates whether a C program should include <sys/mman.h>.
2167 i_sysmode (i_sysmode.U):
2168 This variable conditionally defines the I_SYSMODE symbol,
2169 and indicates whether a C program should include <sys/mode.h>.
2171 i_sysmount (i_sysmount.U):
2172 This variable conditionally defines the I_SYSMOUNT symbol,
2173 and indicates whether a C program should include <sys/mount.h>.
2175 i_sysndir (i_sysndir.U):
2176 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2177 whether a C program should include <sys/ndir.h>.
2179 i_sysparam (i_sysparam.U):
2180 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2181 whether a C program should include <sys/param.h>.
2183 i_sysresrc (i_sysresrc.U):
2184 This variable conditionally defines the I_SYS_RESOURCE symbol,
2185 and indicates whether a C program should include <sys/resource.h>.
2187 i_syssecrt (i_syssecrt.U):
2188 This variable conditionally defines the I_SYS_SECURITY symbol,
2189 and indicates whether a C program should include <sys/security.h>.
2191 i_sysselct (i_sysselct.U):
2192 This variable conditionally defines I_SYS_SELECT, which indicates
2193 to the C program that it should include <sys/select.h> in order to
2194 get the definition of struct timeval.
2196 i_syssockio (i_sysioctl.U):
2197 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2198 C program that socket ioctl codes may be found in <sys/sockio.h>
2199 instead of <sys/ioctl.h>.
2201 i_sysstat (i_sysstat.U):
2202 This variable conditionally defines the I_SYS_STAT symbol,
2203 and indicates whether a C program should include <sys/stat.h>.
2205 i_sysstatfs (i_sysstatfs.U):
2206 This variable conditionally defines the I_SYSSTATFS symbol,
2207 and indicates whether a C program should include <sys/statfs.h>.
2209 i_sysstatvfs (i_sysstatvfs.U):
2210 This variable conditionally defines the I_SYSSTATVFS symbol,
2211 and indicates whether a C program should include <sys/statvfs.h>.
2213 i_systime (i_time.U):
2214 This variable conditionally defines I_SYS_TIME, which indicates
2215 to the C program that it should include <sys/time.h>.
2217 i_systimek (i_time.U):
2218 This variable conditionally defines I_SYS_TIME_KERNEL, which
2219 indicates to the C program that it should include <sys/time.h>
2220 with KERNEL defined.
2222 i_systimes (i_systimes.U):
2223 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2224 whether a C program should include <sys/times.h>.
2226 i_systypes (i_systypes.U):
2227 This variable conditionally defines the I_SYS_TYPES symbol,
2228 and indicates whether a C program should include <sys/types.h>.
2230 i_sysuio (i_sysuio.U):
2231 This variable conditionally defines the I_SYSUIO symbol, and indicates
2232 whether a C program should include <sys/uio.h>.
2234 i_sysun (i_sysun.U):
2235 This variable conditionally defines I_SYS_UN, which indicates
2236 to the C program that it should include <sys/un.h> to get UNIX
2237 domain socket definitions.
2239 i_sysutsname (i_sysutsname.U):
2240 This variable conditionally defines the I_SYSUTSNAME symbol,
2241 and indicates whether a C program should include <sys/utsname.h>.
2243 i_sysvfs (i_sysvfs.U):
2244 This variable conditionally defines the I_SYSVFS symbol,
2245 and indicates whether a C program should include <sys/vfs.h>.
2247 i_syswait (i_syswait.U):
2248 This variable conditionally defines I_SYS_WAIT, which indicates
2249 to the C program that it should include <sys/wait.h>.
2251 i_termio (i_termio.U):
2252 This variable conditionally defines the I_TERMIO symbol, which
2253 indicates to the C program that it should include <termio.h> rather
2256 i_termios (i_termio.U):
2257 This variable conditionally defines the I_TERMIOS symbol, which
2258 indicates to the C program that the POSIX <termios.h> file is
2262 This variable conditionally defines I_TIME, which indicates
2263 to the C program that it should include <time.h>.
2265 i_unistd (i_unistd.U):
2266 This variable conditionally defines the I_UNISTD symbol, and indicates
2267 whether a C program should include <unistd.h>.
2269 i_ustat (i_ustat.U):
2270 This variable conditionally defines the I_USTAT symbol, and indicates
2271 whether a C program should include <ustat.h>.
2273 i_utime (i_utime.U):
2274 This variable conditionally defines the I_UTIME symbol, and indicates
2275 whether a C program should include <utime.h>.
2277 i_values (i_values.U):
2278 This variable conditionally defines the I_VALUES symbol, and indicates
2279 whether a C program may include <values.h> to get symbols like MAXLONG
2282 i_varargs (i_varhdr.U):
2283 This variable conditionally defines I_VARARGS, which indicates
2284 to the C program that it should include <varargs.h>.
2286 i_varhdr (i_varhdr.U):
2287 Contains the name of the header to be included to get va_dcl definition.
2288 Typically one of varargs.h or stdarg.h.
2290 i_vfork (i_vfork.U):
2291 This variable conditionally defines the I_VFORK symbol, and indicates
2292 whether a C program should include vfork.h.
2294 ignore_versioned_solibs (libs.U):
2295 This variable should be non-empty if non-versioned shared
2296 libraries (libfoo.so.x.y) are to be ignored (because they
2297 cannot be linked against).
2299 inc_version_list (inc_version_list.U):
2300 This variable specifies the list of subdirectories in over
2301 which perl.c:incpush() and lib/lib.pm will automatically
2302 search when adding directories to @INC. The elements in
2303 the list are separated by spaces. This is only useful
2304 if you have a perl library directory tree structured like the
2305 default one. See INSTALL for how this works. The versioned
2306 site_perl directory was introduced in 5.005, so that is the
2307 lowest possible value.
2309 inc_version_list_init (inc_version_list.U):
2310 This variable holds the same list as inc_version_list, but
2311 each item is enclosed in double quotes and separated by commas,
2312 suitable for use in the PERL_INC_VERSION_LIST initialization.
2315 This variable must preceed the normal include path to get hte
2316 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2317 Value can be "" or "/bsd43" on mips.
2320 This variable is defined but not used by Configure.
2321 The value is a plain '' and is not useful.
2323 installarchlib (archlib.U):
2324 This variable is really the same as archlibexp but may differ on
2325 those systems using AFS. For extra portability, only this variable
2326 should be used in makefiles.
2329 This variable is the same as binexp unless AFS is running in which case
2330 the user is explicitely prompted for it. This variable should always
2331 be used in your makefiles for maximum portability.
2333 installman1dir (man1dir.U):
2334 This variable is really the same as man1direxp, unless you are using
2335 AFS in which case it points to the read/write location whereas
2336 man1direxp only points to the read-only access location. For extra
2337 portability, you should only use this variable within your makefiles.
2339 installman3dir (man3dir.U):
2340 This variable is really the same as man3direxp, unless you are using
2341 AFS in which case it points to the read/write location whereas
2342 man3direxp only points to the read-only access location. For extra
2343 portability, you should only use this variable within your makefiles.
2345 installprefix (installprefix.U):
2346 This variable holds the name of the directory below which
2347 "make install" will install the package. For most users, this
2348 is the same as prefix. However, it is useful for
2349 installing the software into a different (usually temporary)
2350 location after which it can be bundled up and moved somehow
2351 to the final location specified by prefix.
2353 installprefixexp (installprefix.U):
2354 This variable holds the full absolute path of installprefix
2355 with all ~-expansion done.
2357 installprivlib (privlib.U):
2358 This variable is really the same as privlibexp but may differ on
2359 those systems using AFS. For extra portability, only this variable
2360 should be used in makefiles.
2362 installscript (scriptdir.U):
2363 This variable is usually the same as scriptdirexp, unless you are on
2364 a system running AFS, in which case they may differ slightly. You
2365 should always use this variable within your makefiles for portability.
2367 installsitearch (sitearch.U):
2368 This variable is really the same as sitearchexp but may differ on
2369 those systems using AFS. For extra portability, only this variable
2370 should be used in makefiles.
2372 installsitebin (sitebin.U):
2373 This variable is usually the same as sitebinexp, unless you are on
2374 a system running AFS, in which case they may differ slightly. You
2375 should always use this variable within your makefiles for portability.
2377 installsitelib (sitelib.U):
2378 This variable is really the same as sitelibexp but may differ on
2379 those systems using AFS. For extra portability, only this variable
2380 should be used in makefiles.
2382 installstyle (installstyle.U):
2383 This variable describes the "style" of the perl installation.
2384 This is intended to be useful for tools that need to
2385 manipulate entire perl distributions. Perl itself doesn't use
2386 this to find its libraries -- the library directories are
2387 stored directly in Config.pm. Currently, there are only two
2388 styles: "lib" and "lib/perl5". The default library locations
2389 (e.g. privlib, sitelib) are either $prefix/lib or
2390 $prefix/lib/perl5. The former is useful if $prefix is a
2391 directory dedicated to perl (e.g. /opt/perl), while the latter
2392 is useful if $prefix is shared by many packages, e.g. if
2394 This may later be extended to include other information, so
2395 be careful with pattern-matching on the results.
2396 For compatibility with perl5.005 and earlier, the default
2397 setting is based on whether or not $prefix contains the string
2400 installusrbinperl (instubperl.U):
2401 This variable tells whether Perl should be installed also as
2402 /usr/bin/perl in addition to
2405 installvendorarch (vendorarch.U):
2406 This variable is really the same as vendorarchexp but may differ on
2407 those systems using AFS. For extra portability, only this variable
2408 should be used in makefiles.
2410 installvendorbin (vendorbin.U):
2411 This variable is really the same as vendorbinexp but may differ on
2412 those systems using AFS. For extra portability, only this variable
2413 should be used in makefiles.
2415 installvendorlib (vendorlib.U):
2416 This variable is really the same as vendorlibexp but may differ on
2417 those systems using AFS. For extra portability, only this variable
2418 should be used in makefiles.
2420 intsize (intsize.U):
2421 This variable contains the value of the INTSIZE symbol, which
2422 indicates to the C program how many bytes there are in an int.
2424 ivdformat (perlxvf.U):
2425 This variable contains the format string used for printing
2426 a Perl IV as a signed decimal integer.
2429 This variable is the size of an IV in bytes.
2432 This variable contains the C type used for Perl's IV.
2434 known_extensions (Extensions.U):
2435 This variable holds a list of all XS extensions included in
2439 This variable is defined but not used by Configure.
2440 The value is a plain '' and is not useful.
2443 This variable indicates the program to be used to link
2444 libraries for dynamic loading. On some systems, it is 'ld'.
2445 On ELF systems, it should be $cc. Mostly, we'll try to respect
2446 the hint file setting.
2448 lddlflags (dlsrc.U):
2449 This variable contains any special flags that might need to be
2450 passed to $ld to create a shared library suitable for dynamic
2451 loading. It is up to the makefile to use it. For hpux, it
2452 should be '-b'. For sunos 4.1, it is empty.
2454 ldflags (ccflags.U):
2455 This variable contains any additional C loader flags desired by
2456 the user. It is up to the Makefile to use this.
2458 ldflags_uselargefiles (uselfs.U):
2459 This variable contains the loader flags needed by large file builds
2460 and added to ldflags by hints files.
2462 ldlibpthname (libperl.U):
2463 This variable holds the name of the shared library
2464 search path, often LD_LIBRARY_PATH. To get an empty
2465 string, the hints file must set this to 'none'.
2468 This variable is used internally by Configure to determine the
2469 full pathname (if any) of the less program. After Configure runs,
2470 the value is reset to a plain "less" and is not useful.
2473 This is an old synonym for _a.
2476 This variable contains the location of the C library.
2478 libperl (libperl.U):
2479 The perl executable is obtained by linking perlmain.c with
2480 libperl, any static extensions (usually just DynaLoader),
2481 and any other libraries needed on this system. libperl
2482 is usually libperl.a, but can also be libperl.so.xxx if
2483 the user wishes to build a perl executable with a shared
2487 This variable holds the general path (space-separated) used to find
2488 libraries. It is intended to be used by other units.
2491 This variable holds the additional libraries we want to use.
2492 It is up to the Makefile to deal with it.
2495 This variable holds the directory names aka dirnames of the libraries
2496 we found and accepted, duplicates are removed.
2499 This variable holds the filenames aka basenames of the libraries
2500 we found and accepted.
2503 This variable holds the full pathnames of the libraries
2504 we found and accepted.
2507 This variable holds the directory names probed for libraries.
2509 libswanted (Myinit.U):
2510 This variable holds a list of all the libraries we want to
2511 search. The order is chosen to pick up the c library
2512 ahead of ucb or bsd libraries for SVR4.
2514 libswanted_uselargefiles (uselfs.U):
2515 This variable contains the libraries needed by large file builds
2516 and added to ldflags by hints files. It is a space separated list
2517 of the library names without the "lib" prefix or any suffix, just
2521 This variable is defined but not used by Configure.
2522 The value is a plain '' and is not useful.
2525 This variable is defined but not used by Configure.
2526 The value is a plain '' and is not useful.
2528 lkflags (ccflags.U):
2529 This variable contains any additional C partial linker flags desired by
2530 the user. It is up to the Makefile to use this.
2533 This variable is used internally by Configure to determine the
2534 full pathname (if any) of the ln program. After Configure runs,
2535 the value is reset to a plain "ln" and is not useful.
2538 This variable holds the name of the command to make
2539 symbolic links (if they are supported). It can be used
2540 in the Makefile. It is either 'ln -s' or 'ln'
2542 locincpth (ccflags.U):
2543 This variable contains a list of additional directories to be
2544 searched by the compiler. The appropriate '-I' directives will
2545 be added to ccflags. This is intended to simplify setting
2546 local directories from the Configure command line.
2547 It's not much, but it parallels the loclibpth stuff in libpth.U.
2549 loclibpth (libpth.U):
2550 This variable holds the paths (space-separated) used to find local
2551 libraries. It is prepended to libpth, and is intended to be easily
2552 set from the command line.
2554 longdblsize (d_longdbl.U):
2555 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2556 indicates to the C program how many bytes there are in a long double,
2557 if this system supports long doubles.
2559 longlongsize (d_longlong.U):
2560 This variable contains the value of the LONGLONGSIZE symbol, which
2561 indicates to the C program how many bytes there are in a long long,
2562 if this system supports long long.
2564 longsize (intsize.U):
2565 This variable contains the value of the LONGSIZE symbol, which
2566 indicates to the C program how many bytes there are in a long.
2569 This variable is defined but not used by Configure.
2570 The value is a plain '' and is not useful.
2573 This variable is defined but not used by Configure.
2574 The value is a plain '' and is not useful.
2577 This variable is used internally by Configure to determine the
2578 full pathname (if any) of the ls program. After Configure runs,
2579 the value is reset to a plain "ls" and is not useful.
2581 lseeksize (lseektype.U):
2582 This variable defines lseektype to be something like off_t, long,
2583 or whatever type is used to declare lseek offset's type in the
2584 kernel (which also appears to be lseek's return type).
2586 lseektype (lseektype.U):
2587 This variable defines lseektype to be something like off_t, long,
2588 or whatever type is used to declare lseek offset's type in the
2589 kernel (which also appears to be lseek's return type).
2592 This variable is defined but not used by Configure.
2593 The value is a plain '' and is not useful.
2596 This variable is defined but not used by Configure.
2597 The value is a plain '' and is not useful.
2600 This variable is used internally by Configure to determine the
2601 full pathname (if any) of the make program. After Configure runs,
2602 the value is reset to a plain "make" and is not useful.
2604 make_set_make (make.U):
2605 Some versions of 'make' set the variable MAKE. Others do not.
2606 This variable contains the string to be included in Makefile.SH
2607 so that MAKE is set if needed, and not if not needed.
2608 Possible values are:
2609 make_set_make='#' # If your make program handles this for you,
2610 make_set_make="MAKE=$make" # if it doesn't.
2611 I used a comment character so that we can distinguish a
2612 'set' value (from a previous config.sh or Configure '-D' option)
2613 from an uncomputed value.
2615 mallocobj (mallocsrc.U):
2616 This variable contains the name of the malloc.o that this package
2617 generates, if that malloc.o is preferred over the system malloc.
2618 Otherwise the value is null. This variable is intended for generating
2619 Makefiles. See mallocsrc.
2621 mallocsrc (mallocsrc.U):
2622 This variable contains the name of the malloc.c that comes with
2623 the package, if that malloc.c is preferred over the system malloc.
2624 Otherwise the value is null. This variable is intended for generating
2627 malloctype (mallocsrc.U):
2628 This variable contains the kind of ptr returned by malloc and realloc.
2630 man1dir (man1dir.U):
2631 This variable contains the name of the directory in which manual
2632 source pages are to be put. It is the responsibility of the
2633 Makefile.SH to get the value of this into the proper command.
2634 You must be prepared to do the ~name expansion yourself.
2636 man1direxp (man1dir.U):
2637 This variable is the same as the man1dir variable, but is filename
2638 expanded at configuration time, for convenient use in makefiles.
2640 man1ext (man1dir.U):
2641 This variable contains the extension that the manual page should
2642 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2645 man3dir (man3dir.U):
2646 This variable contains the name of the directory in which manual
2647 source pages are to be put. It is the responsibility of the
2648 Makefile.SH to get the value of this into the proper command.
2649 You must be prepared to do the ~name expansion yourself.
2651 man3direxp (man3dir.U):
2652 This variable is the same as the man3dir variable, but is filename
2653 expanded at configuration time, for convenient use in makefiles.
2655 man3ext (man3dir.U):
2656 This variable contains the extension that the manual page should
2657 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2661 This variable is used internally by Configure to determine the
2662 full pathname (if any) of the Mcc program. After Configure runs,
2663 the value is reset to a plain "Mcc" and is not useful.
2665 mips_type (usrinc.U):
2666 This variable holds the environment type for the mips system.
2667 Possible values are "BSD 4.3" and "System V".
2670 This variable is used internally by Configure to determine the
2671 full pathname (if any) of the mkdir program. After Configure runs,
2672 the value is reset to a plain "mkdir" and is not useful.
2674 mmaptype (d_mmap.U):
2675 This symbol contains the type of pointer returned by mmap()
2676 (and simultaneously the type of the first argument).
2677 It can be 'void *' or 'caddr_t'.
2679 modetype (modetype.U):
2680 This variable defines modetype to be something like mode_t,
2681 int, unsigned short, or whatever type is used to declare file
2682 modes for system calls.
2685 This variable is used internally by Configure to determine the
2686 full pathname (if any) of the more program. After Configure runs,
2687 the value is reset to a plain "more" and is not useful.
2689 multiarch (multiarch.U):
2690 This variable conditionally defines the MULTIARCH symbol
2691 which signifies the presence of multiplatform files.
2692 This is normally set by hints files.
2695 This variable is defined but not used by Configure.
2696 The value is a plain '' and is not useful.
2698 myarchname (archname.U):
2699 This variable holds the architecture name computed by Configure in
2700 a previous run. It is not intended to be perused by any user and
2701 should never be set in a hint file.
2703 mydomain (myhostname.U):
2704 This variable contains the eventual value of the MYDOMAIN symbol,
2705 which is the domain of the host the program is going to run on.
2706 The domain must be appended to myhostname to form a complete host name.
2707 The dot comes with mydomain, and need not be supplied by the program.
2709 myhostname (myhostname.U):
2710 This variable contains the eventual value of the MYHOSTNAME symbol,
2711 which is the name of the host the program is going to run on.
2712 The domain is not kept with hostname, but must be gotten from mydomain.
2713 The dot comes with mydomain, and need not be supplied by the program.
2715 myuname (Oldconfig.U):
2716 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2717 pseudo variables assignments in the output are stripped, thank you. The
2718 whole thing is then lower-cased.
2721 This variable contains the '-n' flag if that is what causes the echo
2722 command to suppress newline. Otherwise it is null. Correct usage is
2723 $echo $n "prompt for a question: $c".
2725 netdb_hlen_type (netdbtype.U):
2726 This variable holds the type used for the 2nd argument to
2727 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2728 This is only useful if you have gethostbyaddr(), naturally.
2730 netdb_host_type (netdbtype.U):
2731 This variable holds the type used for the 1st argument to
2732 gethostbyaddr(). Usually, this is char * or void *, possibly
2733 with or without a const prefix.
2734 This is only useful if you have gethostbyaddr(), naturally.
2736 netdb_name_type (netdbtype.U):
2737 This variable holds the type used for the argument to
2738 gethostbyname(). Usually, this is char * or const char *.
2739 This is only useful if you have gethostbyname(), naturally.
2741 netdb_net_type (netdbtype.U):
2742 This variable holds the type used for the 1st argument to
2743 getnetbyaddr(). Usually, this is int or long.
2744 This is only useful if you have getnetbyaddr(), naturally.
2747 This variable is used internally by Configure to determine the
2748 full pathname (if any) of the nm program. After Configure runs,
2749 the value is reset to a plain "nm" and is not useful.
2752 This variable holds the options that may be necessary for nm.
2754 nm_so_opt (usenm.U):
2755 This variable holds the options that may be necessary for nm
2756 to work on a shared library but that can not be used on an
2757 archive library. Currently, this is only used by Linux, where
2758 nm --dynamic is *required* to get symbols from an ELF library which
2759 has been stripped, but nm --dynamic is *fatal* on an archive library.
2760 Maybe Linux should just always set usenm=false.
2762 nonxs_ext (Extensions.U):
2763 This variable holds a list of all non-xs extensions included
2764 in the package. All of them will be built.
2767 This variable is used internally by Configure to determine the
2768 full pathname (if any) of the nroff program. After Configure runs,
2769 the value is reset to a plain "nroff" and is not useful.
2771 nveformat (perlxvf.U):
2772 This variable contains the format string used for printing
2773 a Perl NV using %e-ish floating point format.
2775 nvEUformat (perlxvf.U):
2776 This variable contains the format string used for printing
2777 a Perl NV using %E-ish floating point format.
2779 nvfformat (perlxvf.U):
2780 This variable confains the format string used for printing
2781 a Perl NV using %f-ish floating point format.
2783 nvFUformat (perlxvf.U):
2784 This variable confains the format string used for printing
2785 a Perl NV using %F-ish floating point format.
2787 nvgformat (perlxvf.U):
2788 This variable contains the format string used for printing
2789 a Perl NV using %g-ish floating point format.
2791 nvGUformat (perlxvf.U):
2792 This variable contains the format string used for printing
2793 a Perl NV using %G-ish floating point format.
2796 This variable is the size of an NV in bytes.
2799 This variable contains the C type used for Perl's NV.
2801 o_nonblock (nblock_io.U):
2802 This variable bears the symbol value to be used during open() or fcntl()
2803 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2804 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2805 but that is only supported by some devices.
2808 This is an old synonym for _o.
2810 old_pthread_create_joinable (d_pthrattrj.U):
2811 This variable defines the constant to use for creating joinable
2812 (aka undetached) pthreads. Unused if pthread.h defines
2813 PTHREAD_CREATE_JOINABLE. If used, possible values are
2814 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2816 optimize (ccflags.U):
2817 This variable contains any optimizer/debugger flag that should be used.
2818 It is up to the Makefile to use it.
2820 orderlib (orderlib.U):
2821 This variable is "true" if the components of libraries must be ordered
2822 (with `lorder $* | tsort`) before placing them in an archive. Set to
2823 "false" if ranlib or ar can generate random libraries.
2825 osname (Oldconfig.U):
2826 This variable contains the operating system name (e.g. sunos,
2827 solaris, hpux, etc.). It can be useful later on for setting
2828 defaults. Any spaces are replaced with underscores. It is set
2829 to a null string if we can't figure it out.
2831 osvers (Oldconfig.U):
2832 This variable contains the operating system version (e.g.
2833 4.1.3, 5.2, etc.). It is primarily used for helping select
2834 an appropriate hints file, but might be useful elsewhere for
2835 setting defaults. It is set to '' if we can't figure it out.
2836 We try to be flexible about how much of the version number
2837 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2838 same for this package, hints files might just be os_4.0 or
2839 os_4.1, etc., not keeping separate files for each little release.
2841 otherlibdirs (otherlibdirs.U):
2842 This variable contains a colon-separated set of paths for the perl
2843 binary to search for additional library files or modules.
2844 These directories will be tacked to the end of @INC.
2845 Perl will automatically search below each path for version-
2846 and architecture-specific directories. See inc_version_list
2848 A value of ' ' means 'none' and is used to preserve this value
2849 for the next run through Configure.
2851 package (package.U):
2852 This variable contains the name of the package being constructed.
2853 It is primarily intended for the use of later Configure units.
2856 This variable contains the name of the preferred pager on the system.
2857 Usual values are (the full pathnames of) more, less, pg, or cat.
2860 This variable contains a command that produces the text of the
2861 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2862 "ypcat passwd" when NIS is used.
2863 On some systems, such as os390, there may be no equivalent
2864 command, in which case this variable is unset.
2866 patchlevel (patchlevel.U):
2867 The patchlevel level of this package.
2868 The value of patchlevel comes from the patchlevel.h file.
2869 In a version number such as 5.6.1, this is the "6".
2870 In patchlevel.h, this is referred to as "PERL_VERSION".
2873 This is an old synonym for p_ in Head.U, the character
2874 used to separate elements in the command shell search PATH.
2877 This variable contains the full path (if any) to a previously
2878 installed perl5.005 or later suitable for running the script
2879 to determine inc_version_list.
2882 This variable is defined but not used by Configure.
2883 The value is a plain '' and is not useful.
2885 PERL_REVISION (Oldsyms.U):
2886 In a Perl version number such as 5.6.2, this is the 5.
2887 This value is manually set in patchlevel.h
2889 PERL_SUBVERSION (Oldsyms.U):
2890 In a Perl version number such as 5.6.2, this is the 2.
2891 Values greater than 50 represent potentially unstable
2892 development subversions.
2893 This value is manually set in patchlevel.h
2895 PERL_VERSION (Oldsyms.U):
2896 In a Perl version number such as 5.6.2, this is the 6.
2897 This value is manually set in patchlevel.h
2899 perladmin (perladmin.U):
2900 Electronic mail address of the perl5 administrator.
2903 The list of libraries needed by Perl only (any libraries needed
2904 by extensions only will by dropped, if using dynamic loading).
2906 perlpath (perlpath.U):
2907 This variable contains the eventual value of the PERLPATH symbol,
2908 which contains the name of the perl interpreter to be used in
2909 shell scripts and in the "eval 'exec'" idiom.
2912 This variable is used internally by Configure to determine the
2913 full pathname (if any) of the pg program. After Configure runs,
2914 the value is reset to a plain "pg" and is not useful.
2916 phostname (myhostname.U):
2917 This variable contains the eventual value of the PHOSTNAME symbol,
2918 which is a command that can be fed to popen() to get the host name.
2919 The program should probably not presume that the domain is or isn't
2922 pidtype (pidtype.U):
2923 This variable defines PIDTYPE to be something like pid_t, int,
2924 ushort, or whatever type is used to declare process ids in the kernel.
2927 Holds the private path used by Configure to find out the libraries.
2928 Its value is prepend to libpth. This variable takes care of special
2929 machines, like the mips. Usually, it should be empty.
2931 pm_apiversion (xs_apiversion.U):
2932 This variable contains the version of the oldest perl
2933 compatible with the present perl. (That is, pure perl modules
2934 written for $pm_apiversion will still work for the current
2935 version). perl.c:incpush() and lib/lib.pm will automatically
2936 search in $sitelib for older directories across major versions
2937 back to pm_apiversion. This is only useful if you have a perl
2938 library directory tree structured like the default one. The
2939 versioned site_perl library was introduced in 5.005, so that's
2940 the default setting for this variable. It's hard to imagine
2941 it changing before Perl6. It is included here for symmetry
2942 with xs_apiveprsion -- the searching algorithms will
2943 (presumably) be similar.
2944 See the INSTALL file for how this works.
2947 This variable is defined but not used by Configure.
2948 The value is a plain '' and is not useful.
2951 This variable is defined but not used by Configure.
2952 The value is a plain '' and is not useful.
2955 This variable holds the name of the directory below which the
2956 user will install the package. Usually, this is /usr/local, and
2957 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2958 man pages in /usr/local/man, etc. It is only used to set defaults
2959 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2961 prefixexp (prefix.U):
2962 This variable holds the full absolute path of the directory below
2963 which the user will install the package. Derived from prefix.
2965 privlib (privlib.U):
2966 This variable contains the eventual value of the PRIVLIB symbol,
2967 which is the name of the private library for this package. It may
2968 have a ~ on the front. It is up to the makefile to eventually create
2969 this directory while performing installation (with ~ substitution).
2971 privlibexp (privlib.U):
2972 This variable is the ~name expanded version of privlib, so that you
2973 may use it directly in Makefiles or shell scripts.
2975 prototype (prototype.U):
2976 This variable holds the eventual value of CAN_PROTOTYPE, which
2977 indicates the C compiler can handle funciton prototypes.
2979 ptrsize (ptrsize.U):
2980 This variable contains the value of the PTRSIZE symbol, which
2981 indicates to the C program how many bytes there are in a pointer.
2983 quadkind (quadtype.U):
2984 This variable, if defined, encodes the type of a quad:
2985 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2987 quadtype (quadtype.U):
2988 This variable defines Quad_t to be something like long, int,
2989 long long, int64_t, or whatever type is used for 64-bit integers.
2991 randbits (randfunc.U):
2992 Indicates how many bits are produced by the function used to
2993 generate normalized random numbers.
2995 randfunc (randfunc.U):
2996 Indicates the name of the random number function to use.
2997 Values include drand48, random, and rand. In C programs,
2998 the 'Drand01' macro is defined to generate uniformly distributed
2999 random numbers over the range [0., 1.[ (see drand01 and nrand).
3001 randseedtype (randfunc.U):
3002 Indicates the type of the argument of the seedfunc.
3004 ranlib (orderlib.U):
3005 This variable is set to the pathname of the ranlib program, if it is
3006 needed to generate random libraries. Set to ":" if ar can generate
3007 random libraries or if random libraries are not supported
3009 rd_nodata (nblock_io.U):
3010 This variable holds the return code from read() when no data is
3011 present. It should be -1, but some systems return 0 when O_NDELAY is
3012 used, which is a shame because you cannot make the difference between
3013 no data and an EOF.. Sigh!
3015 revision (patchlevel.U):
3016 The value of revision comes from the patchlevel.h file.
3017 In a version number such as 5.6.1, this is the "5".
3018 In patchlevel.h, this is referred to as "PERL_REVISION".
3021 This variable is used internally by Configure to determine the
3022 full pathname (if any) of the rm program. After Configure runs,
3023 the value is reset to a plain "rm" and is not useful.
3026 This variable is defined but not used by Configure.
3027 The value is a plain '' and is not useful.
3030 This variable contains 'true' or 'false' depending whether the
3031 nm extraction should be performed or not, according to the value
3032 of usenm and the flags on the Configure command line.
3034 sched_yield (d_pthread_y.U):
3035 This variable defines the way to yield the execution
3036 of the current thread.
3038 scriptdir (scriptdir.U):
3039 This variable holds the name of the directory in which the user wants
3040 to put publicly scripts for the package in question. It is either
3041 the same directory as for binaries, or a special one that can be
3042 mounted across different architectures, like /usr/share. Programs
3043 must be prepared to deal with ~name expansion.
3045 scriptdirexp (scriptdir.U):
3046 This variable is the same as scriptdir, but is filename expanded
3047 at configuration time, for programs not wanting to bother with it.
3050 This variable is used internally by Configure to determine the
3051 full pathname (if any) of the sed program. After Configure runs,
3052 the value is reset to a plain "sed" and is not useful.
3054 seedfunc (randfunc.U):
3055 Indicates the random number generating seed function.
3056 Values include srand48, srandom, and srand.
3058 selectminbits (selectminbits.U):
3059 This variable holds the minimum number of bits operated by select.
3060 That is, if you do select(n, ...), how many bits at least will be
3061 cleared in the masks if some activity is detected. Usually this
3062 is either n or 32*ceil(n/32), especially many little-endians do
3063 the latter. This is only useful if you have select(), naturally.
3065 selecttype (selecttype.U):
3066 This variable holds the type used for the 2nd, 3rd, and 4th
3067 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3068 is defined, and 'int *' otherwise. This is only useful if you
3069 have select(), naturally.
3072 This variable is defined but not used by Configure.
3073 The value is a plain '' and is not useful.
3076 This variable contains the full pathname of the shell used
3077 on this system to execute Bourne shell scripts. Usually, this will be
3078 /bin/sh, though it's possible that some systems will have /bin/ksh,
3079 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3081 This unit comes before Options.U, so you can't set sh with a '-D'
3082 option, though you can override this (and startsh)
3083 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3086 This variable is defined but not used by Configure.
3087 The value is a plain '' and is not useful.
3089 sharpbang (spitshell.U):
3090 This variable contains the string #! if this system supports that
3093 shmattype (d_shmat.U):
3094 This symbol contains the type of pointer returned by shmat().
3095 It can be 'void *' or 'char *'.
3097 shortsize (intsize.U):
3098 This variable contains the value of the SHORTSIZE symbol which
3099 indicates to the C program how many bytes there are in a short.
3101 shrpenv (libperl.U):
3102 If the user builds a shared libperl.so, then we need to tell the
3103 'perl' executable where it will be able to find the installed libperl.so.
3104 One way to do this on some systems is to set the environment variable
3105 LD_RUN_PATH to the directory that will be the final location of the
3106 shared libperl.so. The makefile can use this with something like
3107 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3109 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3112 See the main perl Makefile.SH for actual working usage.
3113 Alternatively, we might be able to use a command line option such
3114 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3115 $archlibexp/CORE (Linux).
3117 shsharp (spitshell.U):
3118 This variable tells further Configure units whether your sh can
3121 sig_count (sig_name.U):
3122 This variable holds a number larger than the largest valid
3123 signal number. This is usually the same as the NSIG macro.
3125 sig_name (sig_name.U):
3126 This variable holds the signal names, space separated. The leading
3127 SIG in signal name is removed. A ZERO is prepended to the
3128 list. This is currently not used.
3130 sig_name_init (sig_name.U):
3131 This variable holds the signal names, enclosed in double quotes and
3132 separated by commas, suitable for use in the SIG_NAME definition
3133 below. A "ZERO" is prepended to the list, and the list is
3134 terminated with a plain 0. The leading SIG in signal names
3135 is removed. See sig_num.
3137 sig_num (sig_name.U):
3138 This variable holds the signal numbers, space separated. A ZERO is
3139 prepended to the list (corresponding to the fake SIGZERO), and
3140 the list is terminated with a 0. Those numbers correspond to
3141 the value of the signal listed in the same place within the
3144 sig_num_init (sig_name.U):
3145 This variable holds the signal numbers, enclosed in double quotes and
3146 separated by commas, suitable for use in the SIG_NUM definition
3147 below. A "ZERO" is prepended to the list, and the list is
3148 terminated with a plain 0.
3150 signal_t (d_voidsig.U):
3151 This variable holds the type of the signal handler (void or int).
3153 sitearch (sitearch.U):
3154 This variable contains the eventual value of the SITEARCH symbol,
3155 which is the name of the private library for this package. It may
3156 have a ~ on the front. It is up to the makefile to eventually create
3157 this directory while performing installation (with ~ substitution).
3158 The standard distribution will put nothing in this directory.
3159 After perl has been installed, users may install their own local
3160 architecture-dependent modules in this directory with
3161 MakeMaker Makefile.PL
3162 or equivalent. See INSTALL for details.
3164 sitearchexp (sitearch.U):
3165 This variable is the ~name expanded version of sitearch, so that you
3166 may use it directly in Makefiles or shell scripts.
3168 sitebin (sitebin.U):
3169 This variable holds the name of the directory in which the user wants
3170 to put add-on publicly executable files for the package in question. It
3171 is most often a local directory such as /usr/local/bin. Programs using
3172 this variable must be prepared to deal with ~name substitution.
3173 The standard distribution will put nothing in this directory.
3174 After perl has been installed, users may install their own local
3175 executables in this directory with
3176 MakeMaker Makefile.PL
3177 or equivalent. See INSTALL for details.
3179 sitebinexp (sitebin.U):
3180 This is the same as the sitebin variable, but is filename expanded at
3181 configuration time, for use in your makefiles.
3183 sitelib (sitelib.U):
3184 This variable contains the eventual value of the SITELIB symbol,
3185 which is the name of the private library for this package. It may
3186 have a ~ on the front. It is up to the makefile to eventually create
3187 this directory while performing installation (with ~ substitution).
3188 The standard distribution will put nothing in this directory.
3189 After perl has been installed, users may install their own local
3190 architecture-independent modules in this directory with
3191 MakeMaker Makefile.PL
3192 or equivalent. See INSTALL for details.
3194 sitelib_stem (sitelib.U):
3195 This variable is $sitelibexp with any trailing version-specific component
3196 removed. The elements in inc_version_list (inc_version_list.U) can
3197 be tacked onto this variable to generate a list of directories to search.
3199 sitelibexp (sitelib.U):
3200 This variable is the ~name expanded version of sitelib, so that you
3201 may use it directly in Makefiles or shell scripts.
3203 siteprefix (siteprefix.U):
3204 This variable holds the full absolute path of the directory below
3205 which the user will install add-on packages.
3206 See INSTALL for usage and examples.
3208 siteprefixexp (siteprefix.U):
3209 This variable holds the full absolute path of the directory below
3210 which the user will install add-on packages. Derived from siteprefix.
3212 sizesize (sizesize.U):
3213 This variable contains the size of a sizetype in bytes.
3215 sizetype (sizetype.U):
3216 This variable defines sizetype to be something like size_t,
3217 unsigned long, or whatever type is used to declare length
3218 parameters for string functions.
3221 This variable is defined but not used by Configure.
3222 The value is a plain '' and is not useful.
3225 This variable is defined but not used by Configure.
3226 The value is a plain '' and is not useful.
3229 This variable holds the extension used to identify shared libraries
3230 (also known as shared objects) on the system. Usually set to 'so'.
3232 sockethdr (d_socket.U):
3233 This variable has any cpp '-I' flags needed for socket support.
3235 socketlib (d_socket.U):
3236 This variable has the names of any libraries needed for socket support.
3238 socksizetype (socksizetype.U):
3239 This variable holds the type used for the size argument
3240 for various socket calls like accept. Usual values include
3241 socklen_t, size_t, and int.
3244 This variable is used internally by Configure to determine the
3245 full pathname (if any) of the sort program. After Configure runs,
3246 the value is reset to a plain "sort" and is not useful.
3248 spackage (package.U):
3249 This variable contains the name of the package being constructed,
3250 with the first letter uppercased, i.e. suitable for starting
3253 spitshell (spitshell.U):
3254 This variable contains the command necessary to spit out a runnable
3255 shell on this system. It is either cat or a grep '-v' for # comments.
3257 sPRId64 (quadfio.U):
3258 This variable, if defined, contains the string used by stdio to
3259 format 64-bit decimal numbers (format 'd') for output.
3261 sPRIeldbl (longdblfio.U):
3262 This variable, if defined, contains the string used by stdio to
3263 format long doubles (format 'e') for output.
3265 sPRIEUldbl (longdblfio.U):
3266 This variable, if defined, contains the string used by stdio to
3267 format long doubles (format 'E') for output.
3268 The 'U' in the name is to separate this from sPRIeldbl so that even
3269 case-blind systems can see the difference.
3271 sPRIfldbl (longdblfio.U):
3272 This variable, if defined, contains the string used by stdio to
3273 format long doubles (format 'f') for output.
3275 sPRIFUldbl (longdblfio.U):
3276 This variable, if defined, contains the string used by stdio to
3277 format long doubles (format 'F') for output.
3278 The 'U' in the name is to separate this from sPRIfldbl so that even
3279 case-blind systems can see the difference.
3281 sPRIgldbl (longdblfio.U):
3282 This variable, if defined, contains the string used by stdio to
3283 format long doubles (format 'g') for output.
3285 sPRIGUldbl (longdblfio.U):
3286 This variable, if defined, contains the string used by stdio to
3287 format long doubles (format 'G') for output.
3288 The 'U' in the name is to separate this from sPRIgldbl so that even
3289 case-blind systems can see the difference.
3291 sPRIi64 (quadfio.U):
3292 This variable, if defined, contains the string used by stdio to
3293 format 64-bit decimal numbers (format 'i') for output.
3295 sPRIo64 (quadfio.U):
3296 This variable, if defined, contains the string used by stdio to
3297 format 64-bit octal numbers (format 'o') for output.
3299 sPRIu64 (quadfio.U):
3300 This variable, if defined, contains the string used by stdio to
3301 format 64-bit unsigned decimal numbers (format 'u') for output.
3303 sPRIx64 (quadfio.U):
3304 This variable, if defined, contains the string used by stdio to
3305 format 64-bit hexadecimal numbers (format 'x') for output.
3307 sPRIXU64 (quadfio.U):
3308 This variable, if defined, contains the string used by stdio to
3309 format 64-bit hExADECimAl numbers (format 'X') for output.
3310 The 'U' in the name is to separate this from sPRIx64 so that even
3311 case-blind systems can see the difference.
3314 This variable holds the path to the package source. It is up to
3315 the Makefile to use this variable and set VPATH accordingly to
3316 find the sources remotely.
3318 sSCNfldbl (longdblfio.U):
3319 This variable, if defined, contains the string used by stdio to
3320 format long doubles (format 'f') for input.
3322 ssizetype (ssizetype.U):
3323 This variable defines ssizetype to be something like ssize_t,
3324 long or int. It is used by functions that return a count
3325 of bytes or an error condition. It must be a signed type.
3326 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3328 startperl (startperl.U):
3329 This variable contains the string to put on the front of a perl
3330 script to make sure (hopefully) that it runs with perl and not some
3331 shell. Of course, that leading line must be followed by the classical
3333 eval 'exec perl -S $0 ${1+"$@"}'
3334 if $running_under_some_shell;
3335 to guarantee perl startup should the shell execute the script. Note
3336 that this magic incatation is not understood by csh.
3338 startsh (startsh.U):
3339 This variable contains the string to put on the front of a shell
3340 script to make sure (hopefully) that it runs with sh and not some
3343 static_ext (Extensions.U):
3344 This variable holds a list of XS extension files we want to
3345 link statically into the package. It is used by Makefile.
3347 stdchar (stdchar.U):
3348 This variable conditionally defines STDCHAR to be the type of char
3349 used in stdio.h. It has the values "unsigned char" or "char".
3351 stdio_base (d_stdstdio.U):
3352 This variable defines how, given a FILE pointer, fp, to access the
3353 _base field (or equivalent) of stdio.h's FILE structure. This will
3354 be used to define the macro FILE_base(fp).
3356 stdio_bufsiz (d_stdstdio.U):
3357 This variable defines how, given a FILE pointer, fp, to determine
3358 the number of bytes store in the I/O buffer pointer to by the
3359 _base field (or equivalent) of stdio.h's FILE structure. This will
3360 be used to define the macro FILE_bufsiz(fp).
3362 stdio_cnt (d_stdstdio.U):
3363 This variable defines how, given a FILE pointer, fp, to access the
3364 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3365 be used to define the macro FILE_cnt(fp).
3367 stdio_filbuf (d_stdstdio.U):
3368 This variable defines how, given a FILE pointer, fp, to tell
3369 stdio to refill it's internal buffers (?). This will
3370 be used to define the macro FILE_filbuf(fp).
3372 stdio_ptr (d_stdstdio.U):
3373 This variable defines how, given a FILE pointer, fp, to access the
3374 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3375 be used to define the macro FILE_ptr(fp).
3377 stdio_stream_array (stdio_streams.U):
3378 This variable tells the name of the array holding the stdio streams.
3379 Usual values include _iob, __iob, and __sF.
3381 strings (i_string.U):
3382 This variable holds the full path of the string header that will be
3383 used. Typically /usr/include/string.h or /usr/include/strings.h.
3386 This variable is defined but not used by Configure.
3387 The value is a plain '' and is not useful.
3389 subversion (patchlevel.U):
3390 The subversion level of this package.
3391 The value of subversion comes from the patchlevel.h file.
3392 In a version number such as 5.6.1, this is the "1".
3393 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3394 This is unique to perl.
3397 This variable holds the place where the manual is located on this
3398 system. It is not the place where the user wants to put his manual
3399 pages. Rather it is the place where Configure may look to find manual
3400 for unix commands (section 1 of the manual usually). See mansrc.
3403 This variable is defined but not used by Configure.
3404 The value is a plain '' and is not useful.
3407 This variable is defined but not used by Configure.
3408 The value is a plain '' and is not useful.
3411 This variable is defined but not used by Configure.
3412 The value is a plain '' and is not useful.
3415 This variable is defined but not used by Configure.
3416 The value is a plain '' and is not useful.
3419 This variable is used internally by Configure to determine the
3420 full pathname (if any) of the test program. After Configure runs,
3421 the value is reset to a plain "test" and is not useful.
3423 timeincl (i_time.U):
3424 This variable holds the full path of the included time header(s).
3426 timetype (d_time.U):
3427 This variable holds the type returned by time(). It can be long,
3428 or time_t on BSD sites (in which case <sys/types.h> should be
3429 included). Anyway, the type Time_t should be used.
3432 This variable is used internally by Configure to determine the
3433 full pathname (if any) of the touch program. After Configure runs,
3434 the value is reset to a plain "touch" and is not useful.
3437 This variable is used internally by Configure to determine the
3438 full pathname (if any) of the tr program. After Configure runs,
3439 the value is reset to a plain "tr" and is not useful.
3442 This variable contains the value to be passed to the tr(1)
3443 command to transliterate a newline. Typical values are
3444 '\012' and '\n'. This is needed for EBCDIC systems where
3445 newline is not necessarily '\012'.
3448 This variable is defined but not used by Configure.
3449 The value is a plain '' and is not useful.
3452 This variable is the size of an U16 in bytes.
3455 This variable contains the C type used for Perl's U16.
3458 This variable is the size of an U32 in bytes.
3461 This variable contains the C type used for Perl's U32.
3464 This variable is the size of an U64 in bytes.
3467 This variable contains the C type used for Perl's U64.
3470 This variable is the size of an U8 in bytes.
3473 This variable contains the C type used for Perl's U8.
3476 This variable contains the format string used for printing a Uid_t.
3478 uidsign (uidsign.U):
3479 This variable contains the signedness of a uidtype.
3480 1 for unsigned, -1 for signed.
3482 uidsize (uidsize.U):
3483 This variable contains the size of a uidtype in bytes.
3485 uidtype (uidtype.U):
3486 This variable defines Uid_t to be something like uid_t, int,
3487 ushort, or whatever type is used to declare user ids in the kernel.
3490 This variable is used internally by Configure to determine the
3491 full pathname (if any) of the uname program. After Configure runs,
3492 the value is reset to a plain "uname" and is not useful.
3495 This variable is used internally by Configure to determine the
3496 full pathname (if any) of the uniq program. After Configure runs,
3497 the value is reset to a plain "uniq" and is not useful.
3499 uquadtype (quadtype.U):
3500 This variable defines Uquad_t to be something like unsigned long,
3501 unsigned int, unsigned long long, uint64_t, or whatever type is
3502 used for 64-bit integers.
3504 use5005threads (usethreads.U):
3505 This variable conditionally defines the USE_5005THREADS symbol,
3506 and indicates that Perl should be built to use the 5.005-based
3507 threading implementation.
3509 use64bitall (use64bits.U):
3510 This variable conditionally defines the USE_64_BIT_ALL symbol,
3511 and indicates that 64-bit integer types should be used
3512 when available. The maximal possible
3513 64-bitness is employed: LP64 or ILP64, meaning that you will
3514 be able to use more than 2 gigabytes of memory. This mode is
3515 even more binary incompatible than USE_64_BIT_INT. You may not
3516 be able to run the resulting executable in a 32-bit CPU at all or
3517 you may need at least to reboot your OS to 64-bit mode.
3519 use64bitint (use64bits.U):
3520 This variable conditionally defines the USE_64_BIT_INT symbol,
3521 and indicates that 64-bit integer types should be used
3522 when available. The minimal possible 64-bitness
3523 is employed, just enough to get 64-bit integers into Perl.
3524 This may mean using for example "long longs", while your memory
3525 may still be limited to 2 gigabytes.
3528 This variable indicates if the system supports dynamic
3529 loading of some sort. See also dlsrc and dlobj.
3531 useithreads (usethreads.U):
3532 This variable conditionally defines the USE_ITHREADS symbol,
3533 and indicates that Perl should be built to use the interpreter-based
3534 threading implementation.
3536 uselargefiles (uselfs.U):
3537 This variable conditionally defines the USE_LARGE_FILES symbol,
3538 and indicates that large file interfaces should be used when
3541 uselongdouble (uselongdbl.U):
3542 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3543 and indicates that long doubles should be used when available.
3545 usemorebits (usemorebits.U):
3546 This variable conditionally defines the USE_MORE_BITS symbol,
3547 and indicates that explicit 64-bit interfaces and long doubles
3548 should be used when available.
3550 usemultiplicity (usemultiplicity.U):
3551 This variable conditionally defines the MULTIPLICITY symbol,
3552 and indicates that Perl should be built to use multiplicity.
3554 usemymalloc (mallocsrc.U):
3555 This variable contains y if the malloc that comes with this package
3556 is desired over the system's version of malloc. People often include
3557 special versions of malloc for effiency, but such versions are often
3558 less portable. See also mallocsrc and mallocobj.
3559 If this is 'y', then -lmalloc is removed from $libs.
3562 This variable contains 'true' or 'false' depending whether the
3563 nm extraction is wanted or not.
3565 useopcode (Extensions.U):
3566 This variable holds either 'true' or 'false' to indicate
3567 whether the Opcode extension should be used. The sole
3568 use for this currently is to allow an easy mechanism
3569 for users to skip the Opcode extension from the Configure
3572 useperlio (useperlio.U):
3573 This variable conditionally defines the USE_PERLIO symbol,
3574 and indicates that the PerlIO abstraction should be
3577 useposix (Extensions.U):
3578 This variable holds either 'true' or 'false' to indicate
3579 whether the POSIX extension should be used. The sole
3580 use for this currently is to allow an easy mechanism
3581 for hints files to indicate that POSIX will not compile
3582 on a particular system.
3585 This variable is set to true when the user agrees to use sfio.
3586 It is set to false when sfio is not available or when the user
3587 explicitely requests not to use sfio. It is here primarily so
3588 that command-line settings can override the auto-detection of
3589 d_sfio without running into a "WHOA THERE".
3591 useshrplib (libperl.U):
3592 This variable is set to 'yes' if the user wishes
3593 to build a shared libperl, and 'no' otherwise.
3595 usesocks (usesocks.U):
3596 This variable conditionally defines the USE_SOCKS symbol,
3597 and indicates that Perl should be built to use SOCKS.
3599 usethreads (usethreads.U):
3600 This variable conditionally defines the USE_THREADS symbol,
3601 and indicates that Perl should be built to use threads.
3603 usevendorprefix (vendorprefix.U):
3604 This variable tells whether the vendorprefix
3605 and consequently other vendor* paths are in use.
3607 usevfork (d_vfork.U):
3608 This variable is set to true when the user accepts to use vfork.
3609 It is set to false when no vfork is available or when the user
3610 explicitely requests not to use vfork.
3613 This variable holds the path of the include files, which is
3614 usually /usr/include. It is mainly used by other Configure units.
3617 This variable is defined but not used by Configure.
3618 The value is a plain '' and is not useful.
3620 uvoformat (perlxvf.U):
3621 This variable contains the format string used for printing
3622 a Perl UV as an unsigned octal integer.
3625 This variable is the size of a UV in bytes.
3628 This variable contains the C type used for Perl's UV.
3630 uvuformat (perlxvf.U):
3631 This variable contains the format string used for printing
3632 a Perl UV as an unsigned decimal integer.
3634 uvxformat (perlxvf.U):
3635 This variable contains the format string used for printing
3636 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3638 uvXUformat (perlxvf.U):
3639 This variable contains the format string used for printing
3640 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3642 vendorarch (vendorarch.U):
3643 This variable contains the value of the PERL_VENDORARCH symbol.
3644 It may have a ~ on the front.
3645 The standard distribution will put nothing in this directory.
3646 Vendors who distribute perl may wish to place their own
3647 architecture-dependent modules and extensions in this directory with
3648 MakeMaker Makefile.PL INSTALLDIRS=vendor
3649 or equivalent. See INSTALL for details.
3651 vendorarchexp (vendorarch.U):
3652 This variable is the ~name expanded version of vendorarch, so that you
3653 may use it directly in Makefiles or shell scripts.
3655 vendorbin (vendorbin.U):
3656 This variable contains the eventual value of the VENDORBIN symbol.
3657 It may have a ~ on the front.
3658 The standard distribution will put nothing in this directory.
3659 Vendors who distribute perl may wish to place additional
3660 binaries in this directory with
3661 MakeMaker Makefile.PL INSTALLDIRS=vendor
3662 or equivalent. See INSTALL for details.
3664 vendorbinexp (vendorbin.U):
3665 This variable is the ~name expanded version of vendorbin, so that you
3666 may use it directly in Makefiles or shell scripts.
3668 vendorlib (vendorlib.U):
3669 This variable contains the eventual value of the VENDORLIB symbol,
3670 which is the name of the private library for this package.
3671 The standard distribution will put nothing in this directory.
3672 Vendors who distribute perl may wish to place their own
3673 modules in this directory with
3674 MakeMaker Makefile.PL INSTALLDIRS=vendor
3675 or equivalent. See INSTALL for details.
3677 vendorlib_stem (vendorlib.U):
3678 This variable is $vendorlibexp with any trailing version-specific component
3679 removed. The elements in inc_version_list (inc_version_list.U) can
3680 be tacked onto this variable to generate a list of directories to search.
3682 vendorlibexp (vendorlib.U):
3683 This variable is the ~name expanded version of vendorlib, so that you
3684 may use it directly in Makefiles or shell scripts.
3686 vendorprefix (vendorprefix.U):
3687 This variable holds the full absolute path of the directory below
3688 which the vendor will install add-on packages.
3689 See INSTALL for usage and examples.
3691 vendorprefixexp (vendorprefix.U):
3692 This variable holds the full absolute path of the directory below
3693 which the vendor will install add-on packages. Derived from vendorprefix.
3695 version (patchlevel.U):
3696 The full version number of this package, such as 5.6.1 (or 5_6_1).
3697 This combines revision, patchlevel, and subversion to get the
3698 full version number, including any possible subversions.
3699 This is suitable for use as a directory name, and hence is
3700 filesystem dependent.
3702 versiononly (versiononly.U):
3703 If set, this symbol indicates that only the version-specific
3704 components of a perl installation should be installed.
3705 This may be useful for making a test installation of a new
3706 version without disturbing the existing installation.
3707 Setting versiononly is equivalent to setting installperl's -v option.
3708 In particular, the non-versioned scripts and programs such as
3709 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3710 (see INSTALL for a more complete list). Nor are the man
3712 Usually, this is undef.
3715 This variable is defined but not used by Configure.
3716 The value is a plain '' and is not useful.
3718 voidflags (voidflags.U):
3719 This variable contains the eventual value of the VOIDFLAGS symbol,
3720 which indicates how much support of the void type is given by this
3721 compiler. See VOIDFLAGS for more info.
3724 This variable holds extra path (space-separated) used to find
3725 libraries on this platform, for example CPU-specific libraries
3726 (on multi-CPU platforms) may be listed here.
3728 xs_apiversion (xs_apiversion.U):
3729 This variable contains the version of the oldest perl binary
3730 compatible with the present perl. perl.c:incpush() and
3731 lib/lib.pm will automatically search in $sitearch for older
3732 directories across major versions back to xs_apiversion.
3733 This is only useful if you have a perl library directory tree
3734 structured like the default one.
3735 See INSTALL for how this works.
3736 The versioned site_perl directory was introduced in 5.005,
3737 so that is the lowest possible value.
3738 Since this can depend on compile time options (such as
3739 bincompat) it is set by Configure. Other non-default sources
3740 of potential incompatibility, such as multiplicity, threads,
3741 debugging, 64bits, sfio, etc., are not checked for currently,
3742 though in principle we could go snooping around in old
3746 This variable is defined but not used by Configure.
3747 The value is a plain '' and is not useful.
3750 This variable is used internally by Configure to determine the
3751 full pathname (if any) of the zip program. After Configure runs,
3752 the value is reset to a plain "zip" and is not useful.