1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
28 This variable is by default set to '/afs'. In the unlikely case
29 this is not the correct root, it is possible to override this with
30 a hint value or command line option. This will be used in subsequent
31 tests for AFSness in the Perl configure and test process.
33 alignbytes (alignbytes.U):
34 This variable holds the number of bytes required to align a
35 double-- or a long double when applicable. Usual values are
36 2, 4 and 8. The default is eight, for safety.
38 ansi2knr (ansi2knr.U):
39 This variable is set if the user needs to run ansi2knr.
40 Currently, this is not supported, so we just abort.
42 aphostname (d_gethname.U):
43 This variable contains the command which can be used to compute the
44 host name. The command is fully qualified by its absolute path, to make
45 it safe when used by a process with super-user privileges.
47 api_revision (patchlevel.U):
48 The three variables, api_revision, api_version, and
49 api_subversion, specify the version of the oldest perl binary
50 compatible with the present perl. In a full version string
51 such as '5.6.1', api_revision is the '5'.
52 Prior to 5.5.640, the format was a floating point number,
54 perl.c:incpush() and lib/lib.pm will automatically search in
55 $sitelib/.. for older directories back to the limit specified
56 by these api_ variables. This is only useful if you have a
57 perl library directory tree structured like the default one.
58 See INSTALL for how this works. The versioned site_perl
59 directory was introduced in 5.005, so that is the lowest
60 possible value. The version list appropriate for the current
61 system is determined in inc_version_list.U.
62 XXX To do: Since compatibility can depend on compile time
63 options (such as bincompat, longlong, etc.) it should
64 (perhaps) be set by Configure, but currently it isn't.
65 Currently, we read a hard-wired value from patchlevel.h.
66 Perhaps what we ought to do is take the hard-wired value from
67 patchlevel.h but then modify it if the current Configure
68 options warrant. patchlevel.h then would use an #ifdef guard.
70 api_subversion (patchlevel.U):
71 The three variables, api_revision, api_version, and
72 api_subversion, specify the version of the oldest perl binary
73 compatible with the present perl. In a full version string
74 such as '5.6.1', api_subversion is the '1'. See api_revision for
77 api_version (patchlevel.U):
78 The three variables, api_revision, api_version, and
79 api_subversion, specify the version of the oldest perl binary
80 compatible with the present perl. In a full version string
81 such as '5.6.1', api_version is the '6'. See api_revision for
82 full details. As a special case, 5.5.0 is rendered in the
83 old-style as 5.005. (In the 5.005_0x maintenance series,
84 this was the only versioned directory in $sitelib.)
86 api_versionstring (patchlevel.U):
87 This variable combines api_revision, api_version, and
88 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
89 for use as a directory name. This is filesystem dependent.
92 This variable is used internally by Configure to determine the
93 full pathname (if any) of the ar program. After Configure runs,
94 the value is reset to a plain "ar" and is not useful.
97 This variable holds the name of the directory in which the user wants
98 to put architecture-dependent public library files for $package.
99 It is most often a local directory such as /usr/local/lib.
100 Programs using this variable must be prepared to deal
101 with filename expansion.
103 archlibexp (archlib.U):
104 This variable is the same as the archlib variable, but is
105 filename expanded at configuration time, for convenient use.
107 archname64 (use64bits.U):
108 This variable is used for the 64-bitness part of $archname.
110 archname (archname.U):
111 This variable is a short name to characterize the current
112 architecture. It is used mainly to construct the default archlib.
115 This variable defines any additional objects that must be linked
116 in with the program on this architecture. On unix, it is usually
117 empty. It is typically used to include emulations of unix calls
118 or other facilities. For perl on OS/2, for example, this would
122 This variable is used internally by Configure to determine the
123 full pathname (if any) of the awk program. After Configure runs,
124 the value is reset to a plain "awk" and is not useful.
127 The base revision level of this package, from the .package file.
130 This variable is defined but not used by Configure.
131 The value is a plain '' and is not useful.
134 This variable holds the name of the directory in which the user wants
135 to put publicly executable images for the package in question. It
136 is most often a local directory such as /usr/local/bin. Programs using
137 this variable must be prepared to deal with ~name substitution.
139 bincompat5005 (bincompat5005.U):
140 This variable contains y if this version of Perl should be
141 binary-compatible with Perl 5.005.
144 This is the same as the bin variable, but is filename expanded at
145 configuration time, for use in your makefiles.
148 This variable is used internally by Configure to determine the
149 full pathname (if any) of the bison program. After Configure runs,
150 the value is reset to a plain "bison" and is not useful.
153 This variable is used internally by Configure to determine the
154 full pathname (if any) of the byacc program. After Configure runs,
155 the value is reset to a plain "byacc" and is not useful.
157 byteorder (byteorder.U):
158 This variable holds the byte order. In the following, larger digits
159 indicate more significance. The variable byteorder is either 4321
160 on a big-endian machine, or 1234 on a little-endian, or 87654321
161 on a Cray ... or 3412 with weird order !
164 This variable contains the \c string if that is what causes the echo
165 command to suppress newline. Otherwise it is null. Correct usage is
166 $echo $n "prompt for a question: $c".
168 castflags (d_castneg.U):
169 This variable contains a flag that precise difficulties the
170 compiler has casting odd floating values to unsigned long:
172 1 = couldn't cast < 0
173 2 = couldn't cast >= 0x80000000
174 4 = couldn't cast in argument expression list
177 This variable is used internally by Configure to determine the
178 full pathname (if any) of the cat program. After Configure runs,
179 the value is reset to a plain "cat" and is not useful.
182 This variable holds the name of a command to execute a C compiler which
183 can resolve multiple global references that happen to have the same
184 name. Usual values are 'cc' and 'gcc'.
185 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
187 cccdlflags (dlsrc.U):
188 This variable contains any special flags that might need to be
189 passed with 'cc -c' to compile modules to be used to create a shared
190 library that will be used for dynamic loading. For hpux, this
191 should be +z. It is up to the makefile to use it.
194 This variable contains any special flags that might need to be
195 passed to cc to link with a shared library for dynamic loading.
196 It is up to the makefile to use it. For sunos 4.1, it should
200 This variable contains any additional C compiler flags desired by
201 the user. It is up to the Makefile to use this.
203 ccflags_uselargefiles (uselfs.U):
204 This variable contains the compiler flags needed by large file builds
205 and added to ccflags by hints files.
208 This can set either by hints files or by Configure. If using
209 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
210 Some platforms, however, make good use of this by storing the
211 flavor of the C compiler being used here. For example if using
212 the Sun WorkShop suite, ccname will be 'workshop'.
214 ccsymbols (Cppsym.U):
215 The variable contains the symbols defined by the C compiler alone.
216 The symbols defined by cpp or by cc when it calls cpp are not in
217 this list, see cppsymbols and cppccsymbols.
218 The list is a space-separated list of symbol=value tokens.
220 ccversion (Checkcc.U):
221 This can set either by hints files or by Configure. If using
222 a (non-gcc) vendor cc, this variable may contain a version for
226 Login name of the person who ran the Configure script and answered the
227 questions. This is used to tag both config.sh and config_h.SH.
229 cf_email (cf_email.U):
230 Electronic mail address of the person who ran Configure. This can be
231 used by units that require the user's e-mail, like MailList.U.
234 Holds the output of the "date" command when the configuration file was
235 produced. This is used to tag both config.sh and config_h.SH.
237 charsize (charsize.U):
238 This variable contains the value of the CHARSIZE symbol, which
239 indicates to the C program how many bytes there are in a character.
242 This variable is defined but not used by Configure.
243 The value is a plain '' and is not useful.
246 This variable is used internally by Configure to determine the
247 full pathname (if any) of the chmod program. After Configure runs,
248 the value is reset to a plain "chmod" and is not useful.
251 This variable is defined but not used by Configure.
252 The value is a plain '' and is not useful.
254 clocktype (d_times.U):
255 This variable holds the type returned by times(). It can be long,
256 or clock_t on BSD sites (in which case <sys/types.h> should be
260 This variable is used internally by Configure to determine the
261 full pathname (if any) of the comm program. After Configure runs,
262 the value is reset to a plain "comm" and is not useful.
265 This variable is defined but not used by Configure.
266 The value is a plain '' and is not useful.
268 contains (contains.U):
269 This variable holds the command to do a grep with a proper return
270 status. On most sane systems it is simply "grep". On insane systems
271 it is a grep followed by a cat followed by a test. This variable
272 is primarily for the use of other Configure units.
275 This variable is used internally by Configure to determine the
276 full pathname (if any) of the cp program. After Configure runs,
277 the value is reset to a plain "cp" and is not useful.
280 This variable is defined but not used by Configure.
281 The value is a plain '' and is not useful.
284 This variable is used internally by Configure to determine the
285 full pathname (if any) of the cpp program. After Configure runs,
286 the value is reset to a plain "cpp" and is not useful.
288 cpp_stuff (cpp_stuff.U):
289 This variable contains an identification of the catenation mechanism
290 used by the C preprocessor.
292 cppccsymbols (Cppsym.U):
293 The variable contains the symbols defined by the C compiler
294 when it calls cpp. The symbols defined by the cc alone or cpp
295 alone are not in this list, see ccsymbols and cppsymbols.
296 The list is a space-separated list of symbol=value tokens.
298 cppflags (ccflags.U):
299 This variable holds the flags that will be passed to the C pre-
300 processor. It is up to the Makefile to use it.
302 cpplast (cppstdin.U):
303 This variable has the same functionality as cppminus, only it applies
304 to cpprun and not cppstdin.
306 cppminus (cppstdin.U):
307 This variable contains the second part of the string which will invoke
308 the C preprocessor on the standard input and produce to standard
309 output. This variable will have the value "-" if cppstdin needs
310 a minus to specify standard input, otherwise the value is "".
313 This variable contains the command which will invoke a C preprocessor
314 on standard input and put the output to stdout. It is guaranteed not
315 to be a wrapper and may be a null string if no preprocessor can be
316 made directly available. This preprocessor might be different from the
317 one used by the C compiler. Don't forget to append cpplast after the
318 preprocessor options.
320 cppstdin (cppstdin.U):
321 This variable contains the command which will invoke the C
322 preprocessor on standard input and put the output to stdout.
323 It is primarily used by other Configure units that ask about
324 preprocessor symbols.
326 cppsymbols (Cppsym.U):
327 The variable contains the symbols defined by the C preprocessor
328 alone. The symbols defined by cc or by cc when it calls cpp are
329 not in this list, see ccsymbols and cppccsymbols.
330 The list is a space-separated list of symbol=value tokens.
332 cryptlib (d_crypt.U):
333 This variable holds -lcrypt or the path to a libcrypt.a archive if
334 the crypt() function is not defined in the standard C library. It is
335 up to the Makefile to use this.
338 This variable is used internally by Configure to determine the
339 full pathname (if any) of the csh program. After Configure runs,
340 the value is reset to a plain "csh" and is not useful.
342 d__fwalk (d__fwalk.U):
343 This variable conditionally defines HAS__FWALK if _fwalk() is
344 available to apply a function to all the file handles.
346 d_access (d_access.U):
347 This variable conditionally defines HAS_ACCESS if the access() system
348 call is available to check for access permissions using real IDs.
350 d_accessx (d_accessx.U):
351 This variable conditionally defines the HAS_ACCESSX symbol, which
352 indicates to the C program that the accessx() routine is available.
355 This variable conditionally defines the HAS_ALARM symbol, which
356 indicates to the C program that the alarm() routine is available.
358 d_archlib (archlib.U):
359 This variable conditionally defines ARCHLIB to hold the pathname
360 of architecture-dependent library files for $package. If
361 $archlib is the same as $privlib, then this is set to undef.
364 This variable conditionally defines the HAS_ATOLF symbol, which
365 indicates to the C program that the atolf() routine is available.
368 This variable conditionally defines the HAS_ATOLL symbol, which
369 indicates to the C program that the atoll() routine is available.
371 d_attribut (d_attribut.U):
372 This variable conditionally defines HASATTRIBUTE, which
373 indicates the C compiler can check for function attributes,
374 such as printf formats.
377 This variable conditionally defines the HAS_BCMP symbol if
378 the bcmp() routine is available to compare strings.
381 This variable conditionally defines the HAS_BCOPY symbol if
382 the bcopy() routine is available to copy strings.
384 d_bincompat5005 (bincompat5005.U):
385 This variable conditionally defines BINCOMPAT5005 so that embed.h
386 can take special action if this version of Perl should be
387 binary-compatible with Perl 5.005. This is impossible for builds
388 that use features like threads and multiplicity it is always $undef
392 This symbol conditionally defines the symbol BSD when running on a
395 d_bsdgetpgrp (d_getpgrp.U):
396 This variable conditionally defines USE_BSD_GETPGRP if
397 getpgrp needs one arguments whereas USG one needs none.
399 d_bsdsetpgrp (d_setpgrp.U):
400 This variable conditionally defines USE_BSD_SETPGRP if
401 setpgrp needs two arguments whereas USG one needs none.
402 See also d_setpgid for a POSIX interface.
405 This variable conditionally defines the HAS_BZERO symbol if
406 the bzero() routine is available to set memory to 0.
408 d_casti32 (d_casti32.U):
409 This variable conditionally defines CASTI32, which indicates
410 whether the C compiler can cast large floats to 32-bit ints.
412 d_castneg (d_castneg.U):
413 This variable conditionally defines CASTNEG, which indicates
414 wether the C compiler can cast negative float to unsigned.
416 d_charvspr (d_vprintf.U):
417 This variable conditionally defines CHARVSPRINTF if this system
418 has vsprintf returning type (char*). The trend seems to be to
419 declare it as "int vsprintf()".
422 This variable conditionally defines the HAS_CHOWN symbol, which
423 indicates to the C program that the chown() routine is available.
425 d_chroot (d_chroot.U):
426 This variable conditionally defines the HAS_CHROOT symbol, which
427 indicates to the C program that the chroot() routine is available.
429 d_chsize (d_chsize.U):
430 This variable conditionally defines the CHSIZE symbol, which
431 indicates to the C program that the chsize() routine is available
432 to truncate files. You might need a -lx to get this routine.
435 This variable conditionally defines the HAS_CLASS symbol, which
436 indicates to the C program that the class() routine is available.
438 d_closedir (d_closedir.U):
439 This variable conditionally defines HAS_CLOSEDIR if closedir() is
442 d_cmsghdr_s (d_cmsghdr_s.U):
443 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
444 which indicates that the struct cmsghdr is supported.
447 This variable conditionally defines the HASCONST symbol, which
448 indicates to the C program that this C compiler knows about the
452 This variable conditionally defines the CRYPT symbol, which
453 indicates to the C program that the crypt() routine is available
454 to encrypt passwords and the like.
457 This variable conditionally defines the CSH symbol, which
458 indicates to the C program that the C-shell exists.
460 d_cuserid (d_cuserid.U):
461 This variable conditionally defines the HAS_CUSERID symbol, which
462 indicates to the C program that the cuserid() routine is available
463 to get character login names.
465 d_dbl_dig (d_dbl_dig.U):
466 This variable conditionally defines d_dbl_dig if this system's
467 header files provide DBL_DIG, which is the number of significant
468 digits in a double precision number.
470 d_dbminitproto (d_dbminitproto.U):
471 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
472 which indicates to the C program that the system provides
473 a prototype for the dbminit() function. Otherwise, it is
474 up to the program to supply one.
476 d_difftime (d_difftime.U):
477 This variable conditionally defines the HAS_DIFFTIME symbol, which
478 indicates to the C program that the difftime() routine is available.
480 d_dirnamlen (i_dirent.U):
481 This variable conditionally defines DIRNAMLEN, which indicates
482 to the C program that the length of directory entry names is
483 provided by a d_namelen field.
485 d_dlerror (d_dlerror.U):
486 This variable conditionally defines the HAS_DLERROR symbol, which
487 indicates to the C program that the dlerror() routine is available.
489 d_dlopen (d_dlopen.U):
490 This variable conditionally defines the HAS_DLOPEN symbol, which
491 indicates to the C program that the dlopen() routine is available.
493 d_dlsymun (d_dlsymun.U):
494 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
495 indicates that we need to prepend an underscore to the symbol
496 name before calling dlsym().
498 d_dosuid (d_dosuid.U):
499 This variable conditionally defines the symbol DOSUID, which
500 tells the C program that it should insert setuid emulation code
501 on hosts which have setuid #! scripts disabled.
503 d_drand48proto (d_drand48proto.U):
504 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
505 which indicates to the C program that the system provides
506 a prototype for the drand48() function. Otherwise, it is
507 up to the program to supply one.
510 This variable conditionally defines HAS_DUP2 if dup2() is
511 available to duplicate file descriptors.
513 d_eaccess (d_eaccess.U):
514 This variable conditionally defines the HAS_EACCESS symbol, which
515 indicates to the C program that the eaccess() routine is available.
517 d_endgrent (d_endgrent.U):
518 This variable conditionally defines the HAS_ENDGRENT symbol, which
519 indicates to the C program that the endgrent() routine is available
520 for sequential access of the group database.
522 d_endhent (d_endhent.U):
523 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
524 available to close whatever was being used for host queries.
526 d_endnent (d_endnent.U):
527 This variable conditionally defines HAS_ENDNETENT if endnetent() is
528 available to close whatever was being used for network queries.
530 d_endpent (d_endpent.U):
531 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
532 available to close whatever was being used for protocol queries.
534 d_endpwent (d_endpwent.U):
535 This variable conditionally defines the HAS_ENDPWENT symbol, which
536 indicates to the C program that the endpwent() routine is available
537 for sequential access of the passwd database.
539 d_endsent (d_endsent.U):
540 This variable conditionally defines HAS_ENDSERVENT if endservent() is
541 available to close whatever was being used for service queries.
543 d_eofnblk (nblock_io.U):
544 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
545 when reading from a non-blocking I/O source.
548 This variable conditionally defines the symbols EUNICE and VAX, which
549 alerts the C program that it must deal with ideosyncracies of VMS.
551 d_fchdir (d_fchdir.U):
552 This variable conditionally defines the HAS_FCHDIR symbol, which
553 indicates to the C program that the fchdir() routine is available.
555 d_fchmod (d_fchmod.U):
556 This variable conditionally defines the HAS_FCHMOD symbol, which
557 indicates to the C program that the fchmod() routine is available
558 to change mode of opened files.
560 d_fchown (d_fchown.U):
561 This variable conditionally defines the HAS_FCHOWN symbol, which
562 indicates to the C program that the fchown() routine is available
563 to change ownership of opened files.
566 This variable conditionally defines the HAS_FCNTL symbol, and indicates
567 whether the fcntl() function exists
569 d_fcntl_can_lock (d_fcntl_can_lock.U):
570 This variable conditionally defines the FCNTL_CAN_LOCK symbol
571 and indicates whether file locking with fcntl() works.
573 d_fd_macros (d_fd_set.U):
574 This variable contains the eventual value of the HAS_FD_MACROS symbol,
575 which indicates if your C compiler knows about the macros which
576 manipulate an fd_set.
578 d_fd_set (d_fd_set.U):
579 This variable contains the eventual value of the HAS_FD_SET symbol,
580 which indicates if your C compiler knows about the fd_set typedef.
582 d_fds_bits (d_fd_set.U):
583 This variable contains the eventual value of the HAS_FDS_BITS symbol,
584 which indicates if your fd_set typedef contains the fds_bits member.
585 If you have an fd_set typedef, but the dweebs who installed it did
586 a half-fast job and neglected to provide the macros to manipulate
587 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
589 d_fgetpos (d_fgetpos.U):
590 This variable conditionally defines HAS_FGETPOS if fgetpos() is
591 available to get the file position indicator.
593 d_finite (d_finite.U):
594 This variable conditionally defines the HAS_FINITE symbol, which
595 indicates to the C program that the finite() routine is available.
597 d_finitel (d_finitel.U):
598 This variable conditionally defines the HAS_FINITEL symbol, which
599 indicates to the C program that the finitel() routine is available.
601 d_flexfnam (d_flexfnam.U):
602 This variable conditionally defines the FLEXFILENAMES symbol, which
603 indicates that the system supports filenames longer than 14 characters.
606 This variable conditionally defines HAS_FLOCK if flock() is
607 available to do file locking.
609 d_flockproto (d_flockproto.U):
610 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
611 which indicates to the C program that the system provides
612 a prototype for the flock() function. Otherwise, it is
613 up to the program to supply one.
616 This variable conditionally defines the HAS_FORK symbol, which
617 indicates to the C program that the fork() routine is available.
619 d_fp_class (d_fp_class.U):
620 This variable conditionally defines the HAS_FP_CLASS symbol, which
621 indicates to the C program that the fp_class() routine is available.
623 d_fpathconf (d_pathconf.U):
624 This variable conditionally defines the HAS_FPATHCONF symbol, which
625 indicates to the C program that the pathconf() routine is available
626 to determine file-system related limits and options associated
627 with a given open file descriptor.
629 d_fpclass (d_fpclass.U):
630 This variable conditionally defines the HAS_FPCLASS symbol, which
631 indicates to the C program that the fpclass() routine is available.
633 d_fpclassify (d_fpclassify.U):
634 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
635 indicates to the C program that the fpclassify() routine is available.
637 d_fpclassl (d_fpclassl.U):
638 This variable conditionally defines the HAS_FPCLASSL symbol, which
639 indicates to the C program that the fpclassl() routine is available.
641 d_fpos64_t (d_fpos64_t.U):
642 This symbol will be defined if the C compiler supports fpos64_t.
644 d_frexpl (d_frexpl.U):
645 This variable conditionally defines the HAS_FREXPL symbol, which
646 indicates to the C program that the frexpl() routine is available.
648 d_fs_data_s (d_fs_data_s.U):
649 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
650 which indicates that the struct fs_data is supported.
652 d_fseeko (d_fseeko.U):
653 This variable conditionally defines the HAS_FSEEKO symbol, which
654 indicates to the C program that the fseeko() routine is available.
656 d_fsetpos (d_fsetpos.U):
657 This variable conditionally defines HAS_FSETPOS if fsetpos() is
658 available to set the file position indicator.
660 d_fstatfs (d_fstatfs.U):
661 This variable conditionally defines the HAS_FSTATFS symbol, which
662 indicates to the C program that the fstatfs() routine is available.
664 d_fstatvfs (d_statvfs.U):
665 This variable conditionally defines the HAS_FSTATVFS symbol, which
666 indicates to the C program that the fstatvfs() routine is available.
669 This variable conditionally defines the HAS_FSYNC symbol, which
670 indicates to the C program that the fsync() routine is available.
672 d_ftello (d_ftello.U):
673 This variable conditionally defines the HAS_FTELLO symbol, which
674 indicates to the C program that the ftello() routine is available.
677 This variable conditionally defines the HAS_FTIME symbol, which indicates
678 that the ftime() routine exists. The ftime() routine is basically
679 a sub-second accuracy clock.
681 d_Gconvert (d_gconvert.U):
682 This variable holds what Gconvert is defined as to convert
683 floating point numbers into strings. It could be 'gconvert'
684 or a more complex macro emulating gconvert with gcvt() or sprintf.
686 d_Gconvert='gconvert((x),(n),(t),(b))'
687 d_Gconvert='gcvt((x),(n),(b))'
688 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
690 d_getcwd (d_getcwd.U):
691 This variable conditionally defines the HAS_GETCWD symbol, which
692 indicates to the C program that the getcwd() routine is available
693 to get the current working directory.
695 d_getespwnam (d_getespwnam.U):
696 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
697 available to retrieve enchanced (shadow) password entries by name.
699 d_getfsstat (d_getfsstat.U):
700 This variable conditionally defines the HAS_GETFSSTAT symbol, which
701 indicates to the C program that the getfsstat() routine is available.
703 d_getgrent (d_getgrent.U):
704 This variable conditionally defines the HAS_GETGRENT symbol, which
705 indicates to the C program that the getgrent() routine is available
706 for sequential access of the group database.
708 d_getgrps (d_getgrps.U):
709 This variable conditionally defines the HAS_GETGROUPS symbol, which
710 indicates to the C program that the getgroups() routine is available
711 to get the list of process groups.
713 d_gethbyaddr (d_gethbyad.U):
714 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
715 indicates to the C program that the gethostbyaddr() routine is available
716 to look up hosts by their IP addresses.
718 d_gethbyname (d_gethbynm.U):
719 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
720 indicates to the C program that the gethostbyname() routine is available
721 to look up host names in some data base or other.
723 d_gethent (d_gethent.U):
724 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
725 available to look up host names in some data base or another.
727 d_gethname (d_gethname.U):
728 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
729 indicates to the C program that the gethostname() routine may be
730 used to derive the host name.
732 d_gethostprotos (d_gethostprotos.U):
733 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
734 which indicates to the C program that <netdb.h> supplies
735 prototypes for the various gethost*() functions.
736 See also netdbtype.U for probing for various netdb types.
738 d_getitimer (d_getitimer.U):
739 This variable conditionally defines the HAS_GETITIMER symbol, which
740 indicates to the C program that the getitimer() routine is available.
742 d_getlogin (d_getlogin.U):
743 This variable conditionally defines the HAS_GETLOGIN symbol, which
744 indicates to the C program that the getlogin() routine is available
745 to get the login name.
747 d_getmnt (d_getmnt.U):
748 This variable conditionally defines the HAS_GETMNT symbol, which
749 indicates to the C program that the getmnt() routine is available
750 to retrieve one or more mount info blocks by filename.
752 d_getmntent (d_getmntent.U):
753 This variable conditionally defines the HAS_GETMNTENT symbol, which
754 indicates to the C program that the getmntent() routine is available
755 to iterate through mounted files to get their mount info.
757 d_getnbyaddr (d_getnbyad.U):
758 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
759 indicates to the C program that the getnetbyaddr() routine is available
760 to look up networks by their IP addresses.
762 d_getnbyname (d_getnbynm.U):
763 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
764 indicates to the C program that the getnetbyname() routine is available
765 to look up networks by their names.
767 d_getnent (d_getnent.U):
768 This variable conditionally defines HAS_GETNETENT if getnetent() is
769 available to look up network names in some data base or another.
771 d_getnetprotos (d_getnetprotos.U):
772 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
773 which indicates to the C program that <netdb.h> supplies
774 prototypes for the various getnet*() functions.
775 See also netdbtype.U for probing for various netdb types.
777 d_getpagsz (d_getpagsz.U):
778 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
779 is available to get the system page size.
781 d_getpbyname (d_getprotby.U):
782 This variable conditionally defines the HAS_GETPROTOBYNAME
783 symbol, which indicates to the C program that the
784 getprotobyname() routine is available to look up protocols
787 d_getpbynumber (d_getprotby.U):
788 This variable conditionally defines the HAS_GETPROTOBYNUMBER
789 symbol, which indicates to the C program that the
790 getprotobynumber() routine is available to look up protocols
793 d_getpent (d_getpent.U):
794 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
795 available to look up protocols in some data base or another.
797 d_getpgid (d_getpgid.U):
798 This variable conditionally defines the HAS_GETPGID symbol, which
799 indicates to the C program that the getpgid(pid) function
800 is available to get the process group id.
802 d_getpgrp2 (d_getpgrp2.U):
803 This variable conditionally defines the HAS_GETPGRP2 symbol, which
804 indicates to the C program that the getpgrp2() (as in DG/UX) routine
805 is available to get the current process group.
807 d_getpgrp (d_getpgrp.U):
808 This variable conditionally defines HAS_GETPGRP if getpgrp() is
809 available to get the current process group.
811 d_getppid (d_getppid.U):
812 This variable conditionally defines the HAS_GETPPID symbol, which
813 indicates to the C program that the getppid() routine is available
814 to get the parent process ID.
816 d_getprior (d_getprior.U):
817 This variable conditionally defines HAS_GETPRIORITY if getpriority()
818 is available to get a process's priority.
820 d_getprotoprotos (d_getprotoprotos.U):
821 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
822 which indicates to the C program that <netdb.h> supplies
823 prototypes for the various getproto*() functions.
824 See also netdbtype.U for probing for various netdb types.
826 d_getprpwnam (d_getprpwnam.U):
827 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
828 available to retrieve protected (shadow) password entries by name.
830 d_getpwent (d_getpwent.U):
831 This variable conditionally defines the HAS_GETPWENT symbol, which
832 indicates to the C program that the getpwent() routine is available
833 for sequential access of the passwd database.
835 d_getsbyname (d_getsrvby.U):
836 This variable conditionally defines the HAS_GETSERVBYNAME
837 symbol, which indicates to the C program that the
838 getservbyname() routine is available to look up services
841 d_getsbyport (d_getsrvby.U):
842 This variable conditionally defines the HAS_GETSERVBYPORT
843 symbol, which indicates to the C program that the
844 getservbyport() routine is available to look up services
847 d_getsent (d_getsent.U):
848 This variable conditionally defines HAS_GETSERVENT if getservent() is
849 available to look up network services in some data base or another.
851 d_getservprotos (d_getservprotos.U):
852 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
853 which indicates to the C program that <netdb.h> supplies
854 prototypes for the various getserv*() functions.
855 See also netdbtype.U for probing for various netdb types.
857 d_getspnam (d_getspnam.U):
858 This variable conditionally defines HAS_GETSPNAM if getspnam() is
859 available to retrieve SysV shadow password entries by name.
861 d_gettimeod (d_ftime.U):
862 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
863 indicates that the gettimeofday() system call exists (to obtain a
864 sub-second accuracy clock). You should probably include <sys/resource.h>.
866 d_gnulibc (d_gnulibc.U):
867 Defined if we're dealing with the GNU C Library.
869 d_grpasswd (i_grp.U):
870 This variable conditionally defines GRPASSWD, which indicates
871 that struct group in <grp.h> contains gr_passwd.
873 d_hasmntopt (d_hasmntopt.U):
874 This variable conditionally defines the HAS_HASMNTOPT symbol, which
875 indicates to the C program that the hasmntopt() routine is available
876 to query the mount options of file systems.
879 This variable conditionally defines HAS_HTONL if htonl() and its
880 friends are available to do network order byte swapping.
882 d_index (d_strchr.U):
883 This variable conditionally defines HAS_INDEX if index() and
884 rindex() are available for string searching.
886 d_inetaton (d_inetaton.U):
887 This variable conditionally defines the HAS_INET_ATON symbol, which
888 indicates to the C program that the inet_aton() function is available
889 to parse IP address "dotted-quad" strings.
891 d_int64_t (d_int64_t.U):
892 This symbol will be defined if the C compiler supports int64_t.
894 d_isascii (d_isascii.U):
895 This variable conditionally defines the HAS_ISASCII constant,
896 which indicates to the C program that isascii() is available.
898 d_isfinite (d_isfinite.U):
899 This variable conditionally defines the HAS_ISFINITE symbol, which
900 indicates to the C program that the isfinite() routine is available.
903 This variable conditionally defines the HAS_ISINF symbol, which
904 indicates to the C program that the isinf() routine is available.
907 This variable conditionally defines the HAS_ISNAN symbol, which
908 indicates to the C program that the isnan() routine is available.
910 d_isnanl (d_isnanl.U):
911 This variable conditionally defines the HAS_ISNANL symbol, which
912 indicates to the C program that the isnanl() routine is available.
914 d_killpg (d_killpg.U):
915 This variable conditionally defines the HAS_KILLPG symbol, which
916 indicates to the C program that the killpg() routine is available
917 to kill process groups.
919 d_lchown (d_lchown.U):
920 This variable conditionally defines the HAS_LCHOWN symbol, which
921 indicates to the C program that the lchown() routine is available
922 to operate on a symbolic link (instead of following the link).
924 d_ldbl_dig (d_ldbl_dig.U):
925 This variable conditionally defines d_ldbl_dig if this system's
926 header files provide LDBL_DIG, which is the number of significant
927 digits in a long double precision number.
930 This variable conditionally defines HAS_LINK if link() is
931 available to create hard links.
933 d_locconv (d_locconv.U):
934 This variable conditionally defines HAS_LOCALECONV if localeconv() is
935 available for numeric and monetary formatting conventions.
938 This variable conditionally defines HAS_LOCKF if lockf() is
939 available to do file locking.
941 d_longdbl (d_longdbl.U):
942 This variable conditionally defines HAS_LONG_DOUBLE if
943 the long double type is supported.
945 d_longlong (d_longlong.U):
946 This variable conditionally defines HAS_LONG_LONG if
947 the long long type is supported.
949 d_lseekproto (d_lseekproto.U):
950 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
951 which indicates to the C program that the system provides
952 a prototype for the lseek() function. Otherwise, it is
953 up to the program to supply one.
956 This variable conditionally defines HAS_LSTAT if lstat() is
957 available to do file stats on symbolic links.
959 d_madvise (d_madvise.U):
960 This variable conditionally defines HAS_MADVISE if madvise() is
961 available to map a file into memory.
964 This variable conditionally defines the HAS_MBLEN symbol, which
965 indicates to the C program that the mblen() routine is available
966 to find the number of bytes in a multibye character.
968 d_mbstowcs (d_mbstowcs.U):
969 This variable conditionally defines the HAS_MBSTOWCS symbol, which
970 indicates to the C program that the mbstowcs() routine is available
971 to convert a multibyte string into a wide character string.
973 d_mbtowc (d_mbtowc.U):
974 This variable conditionally defines the HAS_MBTOWC symbol, which
975 indicates to the C program that the mbtowc() routine is available
976 to convert multibyte to a wide character.
978 d_memchr (d_memchr.U):
979 This variable conditionally defines the HAS_MEMCHR symbol, which
980 indicates to the C program that the memchr() routine is available
981 to locate characters within a C string.
983 d_memcmp (d_memcmp.U):
984 This variable conditionally defines the HAS_MEMCMP symbol, which
985 indicates to the C program that the memcmp() routine is available
986 to compare blocks of memory.
988 d_memcpy (d_memcpy.U):
989 This variable conditionally defines the HAS_MEMCPY symbol, which
990 indicates to the C program that the memcpy() routine is available
991 to copy blocks of memory.
993 d_memmove (d_memmove.U):
994 This variable conditionally defines the HAS_MEMMOVE symbol, which
995 indicates to the C program that the memmove() routine is available
996 to copy potentatially overlapping blocks of memory.
998 d_memset (d_memset.U):
999 This variable conditionally defines the HAS_MEMSET symbol, which
1000 indicates to the C program that the memset() routine is available
1001 to set blocks of memory.
1003 d_mkdir (d_mkdir.U):
1004 This variable conditionally defines the HAS_MKDIR symbol, which
1005 indicates to the C program that the mkdir() routine is available
1006 to create directories..
1008 d_mkdtemp (d_mkdtemp.U):
1009 This variable conditionally defines the HAS_MKDTEMP symbol, which
1010 indicates to the C program that the mkdtemp() routine is available
1011 to exclusively create a uniquely named temporary directory.
1013 d_mkfifo (d_mkfifo.U):
1014 This variable conditionally defines the HAS_MKFIFO symbol, which
1015 indicates to the C program that the mkfifo() routine is available.
1017 d_mkstemp (d_mkstemp.U):
1018 This variable conditionally defines the HAS_MKSTEMP symbol, which
1019 indicates to the C program that the mkstemp() routine is available
1020 to exclusively create and open a uniquely named temporary file.
1022 d_mkstemps (d_mkstemps.U):
1023 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1024 indicates to the C program that the mkstemps() routine is available
1025 to exclusively create and open a uniquely named (with a suffix)
1028 d_mktime (d_mktime.U):
1029 This variable conditionally defines the HAS_MKTIME symbol, which
1030 indicates to the C program that the mktime() routine is available.
1033 This variable conditionally defines HAS_MMAP if mmap() is
1034 available to map a file into memory.
1036 d_modfl (d_modfl.U):
1037 This variable conditionally defines the HAS_MODFL symbol, which
1038 indicates to the C program that the modfl() routine is available.
1040 d_modfl_pow32_bug (d_modfl.U):
1041 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1042 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1043 For example from 4294967303.150000 one would get 4294967302.000000
1044 and 1.150000. The bug has been seen in certain versions of glibc,
1045 release 2.2.2 is known to be okay.
1047 d_mprotect (d_mprotect.U):
1048 This variable conditionally defines HAS_MPROTECT if mprotect() is
1049 available to modify the access protection of a memory mapped file.
1052 This variable conditionally defines the HAS_MSG symbol, which
1053 indicates that the entire msg*(2) library is present.
1055 d_msg_ctrunc (d_socket.U):
1056 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1057 which indicates that the MSG_CTRUNC is available. #ifdef is
1058 not enough because it may be an enum, glibc has been known to do this.
1060 d_msg_dontroute (d_socket.U):
1061 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1062 which indicates that the MSG_DONTROUTE is available. #ifdef is
1063 not enough because it may be an enum, glibc has been known to do this.
1065 d_msg_oob (d_socket.U):
1066 This variable conditionally defines the HAS_MSG_OOB symbol,
1067 which indicates that the MSG_OOB is available. #ifdef is
1068 not enough because it may be an enum, glibc has been known to do this.
1070 d_msg_peek (d_socket.U):
1071 This variable conditionally defines the HAS_MSG_PEEK symbol,
1072 which indicates that the MSG_PEEK is available. #ifdef is
1073 not enough because it may be an enum, glibc has been known to do this.
1075 d_msg_proxy (d_socket.U):
1076 This variable conditionally defines the HAS_MSG_PROXY symbol,
1077 which indicates that the MSG_PROXY is available. #ifdef is
1078 not enough because it may be an enum, glibc has been known to do this.
1080 d_msgctl (d_msgctl.U):
1081 This variable conditionally defines the HAS_MSGCTL symbol, which
1082 indicates to the C program that the msgctl() routine is available.
1084 d_msgget (d_msgget.U):
1085 This variable conditionally defines the HAS_MSGGET symbol, which
1086 indicates to the C program that the msgget() routine is available.
1088 d_msghdr_s (d_msghdr_s.U):
1089 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1090 which indicates that the struct msghdr is supported.
1092 d_msgrcv (d_msgrcv.U):
1093 This variable conditionally defines the HAS_MSGRCV symbol, which
1094 indicates to the C program that the msgrcv() routine is available.
1096 d_msgsnd (d_msgsnd.U):
1097 This variable conditionally defines the HAS_MSGSND symbol, which
1098 indicates to the C program that the msgsnd() routine is available.
1100 d_msync (d_msync.U):
1101 This variable conditionally defines HAS_MSYNC if msync() is
1102 available to synchronize a mapped file.
1104 d_munmap (d_munmap.U):
1105 This variable conditionally defines HAS_MUNMAP if munmap() is
1106 available to unmap a region mapped by mmap().
1108 d_mymalloc (mallocsrc.U):
1109 This variable conditionally defines MYMALLOC in case other parts
1110 of the source want to take special action if MYMALLOC is used.
1111 This may include different sorts of profiling or error detection.
1114 This variable conditionally defines the HAS_NICE symbol, which
1115 indicates to the C program that the nice() routine is available.
1117 d_nl_langinfo (d_nl_langinfo.U):
1118 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1119 indicates to the C program that the nl_langinfo() routine is available.
1121 d_nv_preserves_uv (perlxv.U):
1122 This variable indicates whether a variable of type nvtype
1123 can preserve all the bits a variable of type uvtype.
1125 d_nv_preserves_uv_bits (perlxv.U):
1126 This variable indicates how many of bits type uvtype
1127 a variable nvtype can preserve.
1129 d_off64_t (d_off64_t.U):
1130 This symbol will be defined if the C compiler supports off64_t.
1132 d_old_pthread_create_joinable (d_pthrattrj.U):
1133 This variable conditionally defines pthread_create_joinable.
1134 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1136 d_oldpthreads (usethreads.U):
1137 This variable conditionally defines the OLD_PTHREADS_API symbol,
1138 and indicates that Perl should be built to use the old
1139 draft POSIX threads API. This is only potentially meaningful if
1142 d_oldsock (d_socket.U):
1143 This variable conditionally defines the OLDSOCKET symbol, which
1144 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1146 d_open3 (d_open3.U):
1147 This variable conditionally defines the HAS_OPEN3 manifest constant,
1148 which indicates to the C program that the 3 argument version of
1149 the open(2) function is available.
1151 d_pathconf (d_pathconf.U):
1152 This variable conditionally defines the HAS_PATHCONF symbol, which
1153 indicates to the C program that the pathconf() routine is available
1154 to determine file-system related limits and options associated
1155 with a given filename.
1157 d_pause (d_pause.U):
1158 This variable conditionally defines the HAS_PAUSE symbol, which
1159 indicates to the C program that the pause() routine is available
1160 to suspend a process until a signal is received.
1162 d_perl_otherlibdirs (otherlibdirs.U):
1163 This variable conditionally defines PERL_OTHERLIBDIRS, which
1164 contains a colon-separated set of paths for the perl binary to
1165 include in @INC. See also otherlibdirs.
1167 d_phostname (d_gethname.U):
1168 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1169 contains the shell command which, when fed to popen(), may be
1170 used to derive the host name.
1173 This variable conditionally defines the HAS_PIPE symbol, which
1174 indicates to the C program that the pipe() routine is available
1175 to create an inter-process channel.
1178 This variable conditionally defines the HAS_POLL symbol, which
1179 indicates to the C program that the poll() routine is available
1180 to poll active file descriptors.
1182 d_portable (d_portable.U):
1183 This variable conditionally defines the PORTABLE symbol, which
1184 indicates to the C program that it should not assume that it is
1185 running on the machine it was compiled on.
1187 d_PRId64 (quadfio.U):
1188 This variable conditionally defines the PERL_PRId64 symbol, which
1189 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1191 d_PRIeldbl (longdblfio.U):
1192 This variable conditionally defines the PERL_PRIfldbl symbol, which
1193 indiciates that stdio has a symbol to print long doubles.
1195 d_PRIEUldbl (longdblfio.U):
1196 This variable conditionally defines the PERL_PRIfldbl symbol, which
1197 indiciates that stdio has a symbol to print long doubles.
1198 The 'U' in the name is to separate this from d_PRIeldbl so that even
1199 case-blind systems can see the difference.
1201 d_PRIfldbl (longdblfio.U):
1202 This variable conditionally defines the PERL_PRIfldbl symbol, which
1203 indiciates that stdio has a symbol to print long doubles.
1205 d_PRIFUldbl (longdblfio.U):
1206 This variable conditionally defines the PERL_PRIfldbl symbol, which
1207 indiciates that stdio has a symbol to print long doubles.
1208 The 'U' in the name is to separate this from d_PRIfldbl so that even
1209 case-blind systems can see the difference.
1211 d_PRIgldbl (longdblfio.U):
1212 This variable conditionally defines the PERL_PRIfldbl symbol, which
1213 indiciates that stdio has a symbol to print long doubles.
1215 d_PRIGUldbl (longdblfio.U):
1216 This variable conditionally defines the PERL_PRIfldbl symbol, which
1217 indiciates that stdio has a symbol to print long doubles.
1218 The 'U' in the name is to separate this from d_PRIgldbl so that even
1219 case-blind systems can see the difference.
1221 d_PRIi64 (quadfio.U):
1222 This variable conditionally defines the PERL_PRIi64 symbol, which
1223 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1225 d_PRIo64 (quadfio.U):
1226 This variable conditionally defines the PERL_PRIo64 symbol, which
1227 indiciates that stdio has a symbol to print 64-bit octal numbers.
1229 d_PRIu64 (quadfio.U):
1230 This variable conditionally defines the PERL_PRIu64 symbol, which
1231 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1234 d_PRIx64 (quadfio.U):
1235 This variable conditionally defines the PERL_PRIx64 symbol, which
1236 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1238 d_PRIXU64 (quadfio.U):
1239 This variable conditionally defines the PERL_PRIXU64 symbol, which
1240 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1241 The 'U' in the name is to separate this from d_PRIx64 so that even
1242 case-blind systems can see the difference.
1244 d_pthread_atfork (d_pthread_atfork.U):
1245 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1246 which indicates to the C program that the pthread_atfork()
1247 routine is available.
1249 d_pthread_yield (d_pthread_y.U):
1250 This variable conditionally defines the HAS_PTHREAD_YIELD
1251 symbol if the pthread_yield routine is available to yield
1252 the execution of the current thread.
1255 This variable conditionally defines PWAGE, which indicates
1256 that struct passwd contains pw_age.
1258 d_pwchange (i_pwd.U):
1259 This variable conditionally defines PWCHANGE, which indicates
1260 that struct passwd contains pw_change.
1262 d_pwclass (i_pwd.U):
1263 This variable conditionally defines PWCLASS, which indicates
1264 that struct passwd contains pw_class.
1266 d_pwcomment (i_pwd.U):
1267 This variable conditionally defines PWCOMMENT, which indicates
1268 that struct passwd contains pw_comment.
1270 d_pwexpire (i_pwd.U):
1271 This variable conditionally defines PWEXPIRE, which indicates
1272 that struct passwd contains pw_expire.
1274 d_pwgecos (i_pwd.U):
1275 This variable conditionally defines PWGECOS, which indicates
1276 that struct passwd contains pw_gecos.
1278 d_pwpasswd (i_pwd.U):
1279 This variable conditionally defines PWPASSWD, which indicates
1280 that struct passwd contains pw_passwd.
1282 d_pwquota (i_pwd.U):
1283 This variable conditionally defines PWQUOTA, which indicates
1284 that struct passwd contains pw_quota.
1286 d_qgcvt (d_qgcvt.U):
1287 This variable conditionally defines the HAS_QGCVT symbol, which
1288 indicates to the C program that the qgcvt() routine is available.
1290 d_quad (quadtype.U):
1291 This variable, if defined, tells that there's a 64-bit integer type,
1294 d_readdir (d_readdir.U):
1295 This variable conditionally defines HAS_READDIR if readdir() is
1296 available to read directory entries.
1298 d_readlink (d_readlink.U):
1299 This variable conditionally defines the HAS_READLINK symbol, which
1300 indicates to the C program that the readlink() routine is available
1301 to read the value of a symbolic link.
1303 d_readv (d_readv.U):
1304 This variable conditionally defines the HAS_READV symbol, which
1305 indicates to the C program that the readv() routine is available.
1307 d_recvmsg (d_recvmsg.U):
1308 This variable conditionally defines the HAS_RECVMSG symbol, which
1309 indicates to the C program that the recvmsg() routine is available.
1311 d_rename (d_rename.U):
1312 This variable conditionally defines the HAS_RENAME symbol, which
1313 indicates to the C program that the rename() routine is available
1316 d_rewinddir (d_readdir.U):
1317 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1320 d_rmdir (d_rmdir.U):
1321 This variable conditionally defines HAS_RMDIR if rmdir() is
1322 available to remove directories.
1324 d_safebcpy (d_safebcpy.U):
1325 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1326 the bcopy() routine can do overlapping copies. Normally, you
1327 should probably use memmove().
1329 d_safemcpy (d_safemcpy.U):
1330 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1331 the memcpy() routine can do overlapping copies.
1332 For overlapping copies, memmove() should be used, if available.
1334 d_sanemcmp (d_sanemcmp.U):
1335 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1336 the memcpy() routine is available and can be used to compare relative
1337 magnitudes of chars with their high bits set.
1339 d_sbrkproto (d_sbrkproto.U):
1340 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1341 which indicates to the C program that the system provides
1342 a prototype for the sbrk() function. Otherwise, it is
1343 up to the program to supply one.
1345 d_sched_yield (d_pthread_y.U):
1346 This variable conditionally defines the HAS_SCHED_YIELD
1347 symbol if the sched_yield routine is available to yield
1348 the execution of the current thread.
1350 d_scm_rights (d_socket.U):
1351 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1352 which indicates that the SCM_RIGHTS is available. #ifdef is
1353 not enough because it may be an enum, glibc has been known to do this.
1355 d_SCNfldbl (longdblfio.U):
1356 This variable conditionally defines the PERL_PRIfldbl symbol, which
1357 indiciates that stdio has a symbol to scan long doubles.
1359 d_seekdir (d_readdir.U):
1360 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1363 d_select (d_select.U):
1364 This variable conditionally defines HAS_SELECT if select() is
1365 available to select active file descriptors. A <sys/time.h>
1366 inclusion may be necessary for the timeout field.
1369 This variable conditionally defines the HAS_SEM symbol, which
1370 indicates that the entire sem*(2) library is present.
1372 d_semctl (d_semctl.U):
1373 This variable conditionally defines the HAS_SEMCTL symbol, which
1374 indicates to the C program that the semctl() routine is available.
1376 d_semctl_semid_ds (d_union_semun.U):
1377 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1378 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1380 d_semctl_semun (d_union_semun.U):
1381 This variable conditionally defines USE_SEMCTL_SEMUN, which
1382 indicates that union semun is to be used for semctl IPC_STAT.
1384 d_semget (d_semget.U):
1385 This variable conditionally defines the HAS_SEMGET symbol, which
1386 indicates to the C program that the semget() routine is available.
1388 d_semop (d_semop.U):
1389 This variable conditionally defines the HAS_SEMOP symbol, which
1390 indicates to the C program that the semop() routine is available.
1392 d_sendmsg (d_sendmsg.U):
1393 This variable conditionally defines the HAS_SENDMSG symbol, which
1394 indicates to the C program that the sendmsg() routine is available.
1396 d_setegid (d_setegid.U):
1397 This variable conditionally defines the HAS_SETEGID symbol, which
1398 indicates to the C program that the setegid() routine is available
1399 to change the effective gid of the current program.
1401 d_seteuid (d_seteuid.U):
1402 This variable conditionally defines the HAS_SETEUID symbol, which
1403 indicates to the C program that the seteuid() routine is available
1404 to change the effective uid of the current program.
1406 d_setgrent (d_setgrent.U):
1407 This variable conditionally defines the HAS_SETGRENT symbol, which
1408 indicates to the C program that the setgrent() routine is available
1409 for initializing sequential access to the group database.
1411 d_setgrps (d_setgrps.U):
1412 This variable conditionally defines the HAS_SETGROUPS symbol, which
1413 indicates to the C program that the setgroups() routine is available
1414 to set the list of process groups.
1416 d_sethent (d_sethent.U):
1417 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1420 d_setitimer (d_setitimer.U):
1421 This variable conditionally defines the HAS_SETITIMER symbol, which
1422 indicates to the C program that the setitimer() routine is available.
1424 d_setlinebuf (d_setlnbuf.U):
1425 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1426 indicates to the C program that the setlinebuf() routine is available
1427 to change stderr or stdout from block-buffered or unbuffered to a
1430 d_setlocale (d_setlocale.U):
1431 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1432 available to handle locale-specific ctype implementations.
1434 d_setnent (d_setnent.U):
1435 This variable conditionally defines HAS_SETNETENT if setnetent() is
1438 d_setpent (d_setpent.U):
1439 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1442 d_setpgid (d_setpgid.U):
1443 This variable conditionally defines the HAS_SETPGID symbol if the
1444 setpgid(pid, gpid) function is available to set process group ID.
1446 d_setpgrp2 (d_setpgrp2.U):
1447 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1448 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1449 is available to set the current process group.
1451 d_setpgrp (d_setpgrp.U):
1452 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1453 available to set the current process group.
1455 d_setprior (d_setprior.U):
1456 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1457 is available to set a process's priority.
1459 d_setproctitle (d_setproctitle.U):
1460 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1461 which indicates to the C program that the setproctitle() routine
1464 d_setpwent (d_setpwent.U):
1465 This variable conditionally defines the HAS_SETPWENT symbol, which
1466 indicates to the C program that the setpwent() routine is available
1467 for initializing sequential access to the passwd database.
1469 d_setregid (d_setregid.U):
1470 This variable conditionally defines HAS_SETREGID if setregid() is
1471 available to change the real and effective gid of the current
1474 d_setresgid (d_setregid.U):
1475 This variable conditionally defines HAS_SETRESGID if setresgid() is
1476 available to change the real, effective and saved gid of the current
1479 d_setresuid (d_setreuid.U):
1480 This variable conditionally defines HAS_SETREUID if setresuid() is
1481 available to change the real, effective and saved uid of the current
1484 d_setreuid (d_setreuid.U):
1485 This variable conditionally defines HAS_SETREUID if setreuid() is
1486 available to change the real and effective uid of the current
1489 d_setrgid (d_setrgid.U):
1490 This variable conditionally defines the HAS_SETRGID symbol, which
1491 indicates to the C program that the setrgid() routine is available
1492 to change the real gid of the current program.
1494 d_setruid (d_setruid.U):
1495 This variable conditionally defines the HAS_SETRUID symbol, which
1496 indicates to the C program that the setruid() routine is available
1497 to change the real uid of the current program.
1499 d_setsent (d_setsent.U):
1500 This variable conditionally defines HAS_SETSERVENT if setservent() is
1503 d_setsid (d_setsid.U):
1504 This variable conditionally defines HAS_SETSID if setsid() is
1505 available to set the process group ID.
1507 d_setvbuf (d_setvbuf.U):
1508 This variable conditionally defines the HAS_SETVBUF symbol, which
1509 indicates to the C program that the setvbuf() routine is available
1510 to change buffering on an open stdio stream.
1513 This variable conditionally defines the USE_SFIO symbol,
1514 and indicates whether sfio is available (and should be used).
1517 This variable conditionally defines the HAS_SHM symbol, which
1518 indicates that the entire shm*(2) library is present.
1520 d_shmat (d_shmat.U):
1521 This variable conditionally defines the HAS_SHMAT symbol, which
1522 indicates to the C program that the shmat() routine is available.
1524 d_shmatprototype (d_shmat.U):
1525 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1526 symbol, which indicates that sys/shm.h has a prototype for
1529 d_shmctl (d_shmctl.U):
1530 This variable conditionally defines the HAS_SHMCTL symbol, which
1531 indicates to the C program that the shmctl() routine is available.
1533 d_shmdt (d_shmdt.U):
1534 This variable conditionally defines the HAS_SHMDT symbol, which
1535 indicates to the C program that the shmdt() routine is available.
1537 d_shmget (d_shmget.U):
1538 This variable conditionally defines the HAS_SHMGET symbol, which
1539 indicates to the C program that the shmget() routine is available.
1541 d_sigaction (d_sigaction.U):
1542 This variable conditionally defines the HAS_SIGACTION symbol, which
1543 indicates that the Vr4 sigaction() routine is available.
1545 d_sigprocmask (d_sigprocmask.U):
1546 This variable conditionally defines HAS_SIGPROCMASK
1547 if sigprocmask() is available to examine or change the signal mask
1548 of the calling process.
1550 d_sigsetjmp (d_sigsetjmp.U):
1551 This variable conditionally defines the HAS_SIGSETJMP symbol,
1552 which indicates that the sigsetjmp() routine is available to
1553 call setjmp() and optionally save the process's signal mask.
1555 d_sockatmark (d_sockatmark.U):
1556 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1557 indicates to the C program that the sockatmark() routine is available.
1559 d_sockatmarkproto (d_sockatmarkproto.U):
1560 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1561 which indicates to the C program that the system provides
1562 a prototype for the sockatmark() function. Otherwise, it is
1563 up to the program to supply one.
1565 d_socket (d_socket.U):
1566 This variable conditionally defines HAS_SOCKET, which indicates
1567 that the BSD socket interface is supported.
1569 d_socklen_t (d_socklen_t.U):
1570 This symbol will be defined if the C compiler supports socklen_t.
1572 d_sockpair (d_socket.U):
1573 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1574 indicates that the BSD socketpair() is supported.
1576 d_socks5_init (d_socks5_init.U):
1577 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1578 indicates to the C program that the socks5_init() routine is available.
1580 d_sqrtl (d_sqrtl.U):
1581 This variable conditionally defines the HAS_SQRTL symbol, which
1582 indicates to the C program that the sqrtl() routine is available.
1584 d_sresgproto (d_sresgproto.U):
1585 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
1586 which indicates to the C program that the system provides
1587 a prototype for the setresgid() function. Otherwise, it is
1588 up to the program to supply one.
1590 d_sresuproto (d_sresuproto.U):
1591 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
1592 which indicates to the C program that the system provides
1593 a prototype for the setresuid() function. Otherwise, it is
1594 up to the program to supply one.
1596 d_statblks (d_statblks.U):
1597 This variable conditionally defines USE_STAT_BLOCKS
1598 if this system has a stat structure declaring
1599 st_blksize and st_blocks.
1601 d_statfs_f_flags (d_statfs_f_flags.U):
1602 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1603 symbol, which indicates to struct statfs from has f_flags member.
1604 This kind of struct statfs is coming from sys/mount.h (BSD),
1605 not from sys/statfs.h (SYSV).
1607 d_statfs_s (d_statfs_s.U):
1608 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1609 which indicates that the struct statfs is supported.
1611 d_statvfs (d_statvfs.U):
1612 This variable conditionally defines the HAS_STATVFS symbol, which
1613 indicates to the C program that the statvfs() routine is available.
1615 d_stdio_cnt_lval (d_stdstdio.U):
1616 This variable conditionally defines STDIO_CNT_LVALUE if the
1617 FILE_cnt macro can be used as an lvalue.
1619 d_stdio_ptr_lval (d_stdstdio.U):
1620 This variable conditionally defines STDIO_PTR_LVALUE if the
1621 FILE_ptr macro can be used as an lvalue.
1623 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1624 This symbol is defined if using the FILE_ptr macro as an lvalue
1625 to increase the pointer by n leaves File_cnt(fp) unchanged.
1627 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1628 This symbol is defined if using the FILE_ptr macro as an lvalue
1629 to increase the pointer by n has the side effect of decreasing the
1630 value of File_cnt(fp) by n.
1632 d_stdio_stream_array (stdio_streams.U):
1633 This variable tells whether there is an array holding
1636 d_stdiobase (d_stdstdio.U):
1637 This variable conditionally defines USE_STDIO_BASE if this system
1638 has a FILE structure declaring a usable _base field (or equivalent)
1641 d_stdstdio (d_stdstdio.U):
1642 This variable conditionally defines USE_STDIO_PTR if this system
1643 has a FILE structure declaring usable _ptr and _cnt fields (or
1644 equivalent) in stdio.h.
1646 d_strchr (d_strchr.U):
1647 This variable conditionally defines HAS_STRCHR if strchr() and
1648 strrchr() are available for string searching.
1650 d_strcoll (d_strcoll.U):
1651 This variable conditionally defines HAS_STRCOLL if strcoll() is
1652 available to compare strings using collating information.
1654 d_strctcpy (d_strctcpy.U):
1655 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1656 indicates to the C program that this C compiler knows how to copy
1659 d_strerrm (d_strerror.U):
1660 This variable holds what Strerrr is defined as to translate an error
1661 code condition into an error message string. It could be 'strerror'
1662 or a more complex macro emulating strrror with sys_errlist[], or the
1663 "unknown" string when both strerror and sys_errlist are missing.
1665 d_strerror (d_strerror.U):
1666 This variable conditionally defines HAS_STRERROR if strerror() is
1667 available to translate error numbers to strings.
1669 d_strftime (d_strftime.U):
1670 This variable conditionally defines the HAS_STRFTIME symbol, which
1671 indicates to the C program that the strftime() routine is available.
1673 d_strtod (d_strtod.U):
1674 This variable conditionally defines the HAS_STRTOD symbol, which
1675 indicates to the C program that the strtod() routine is available
1676 to provide better numeric string conversion than atof().
1678 d_strtol (d_strtol.U):
1679 This variable conditionally defines the HAS_STRTOL symbol, which
1680 indicates to the C program that the strtol() routine is available
1681 to provide better numeric string conversion than atoi() and friends.
1683 d_strtold (d_strtold.U):
1684 This variable conditionally defines the HAS_STRTOLD symbol, which
1685 indicates to the C program that the strtold() routine is available.
1687 d_strtoll (d_strtoll.U):
1688 This variable conditionally defines the HAS_STRTOLL symbol, which
1689 indicates to the C program that the strtoll() routine is available.
1691 d_strtoq (d_strtoq.U):
1692 This variable conditionally defines the HAS_STRTOQ symbol, which
1693 indicates to the C program that the strtoq() routine is available.
1695 d_strtoul (d_strtoul.U):
1696 This variable conditionally defines the HAS_STRTOUL symbol, which
1697 indicates to the C program that the strtoul() routine is available
1698 to provide conversion of strings to unsigned long.
1700 d_strtoull (d_strtoull.U):
1701 This variable conditionally defines the HAS_STRTOULL symbol, which
1702 indicates to the C program that the strtoull() routine is available.
1704 d_strtouq (d_strtouq.U):
1705 This variable conditionally defines the HAS_STRTOUQ symbol, which
1706 indicates to the C program that the strtouq() routine is available.
1708 d_strxfrm (d_strxfrm.U):
1709 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1710 available to transform strings.
1712 d_suidsafe (d_dosuid.U):
1713 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1714 if setuid scripts can be secure. This test looks in /dev/fd/.
1716 d_symlink (d_symlink.U):
1717 This variable conditionally defines the HAS_SYMLINK symbol, which
1718 indicates to the C program that the symlink() routine is available
1719 to create symbolic links.
1721 d_syscall (d_syscall.U):
1722 This variable conditionally defines HAS_SYSCALL if syscall() is
1723 available call arbitrary system calls.
1725 d_syscallproto (d_syscallproto.U):
1726 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
1727 which indicates to the C program that the system provides
1728 a prototype for the syscall() function. Otherwise, it is
1729 up to the program to supply one.
1731 d_sysconf (d_sysconf.U):
1732 This variable conditionally defines the HAS_SYSCONF symbol, which
1733 indicates to the C program that the sysconf() routine is available
1734 to determine system related limits and options.
1736 d_sysernlst (d_strerror.U):
1737 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1738 is available to translate error numbers to the symbolic name.
1740 d_syserrlst (d_strerror.U):
1741 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1742 available to translate error numbers to strings.
1744 d_system (d_system.U):
1745 This variable conditionally defines HAS_SYSTEM if system() is
1746 available to issue a shell command.
1748 d_tcgetpgrp (d_tcgtpgrp.U):
1749 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1750 indicates to the C program that the tcgetpgrp() routine is available.
1751 to get foreground process group ID.
1753 d_tcsetpgrp (d_tcstpgrp.U):
1754 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1755 indicates to the C program that the tcsetpgrp() routine is available
1756 to set foreground process group ID.
1758 d_telldir (d_readdir.U):
1759 This variable conditionally defines HAS_TELLDIR if telldir() is
1762 d_telldirproto (d_telldirproto.U):
1763 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1764 which indicates to the C program that the system provides
1765 a prototype for the telldir() function. Otherwise, it is
1766 up to the program to supply one.
1769 This variable conditionally defines the HAS_TIME symbol, which indicates
1770 that the time() routine exists. The time() routine is normaly
1771 provided on UNIX systems.
1773 d_times (d_times.U):
1774 This variable conditionally defines the HAS_TIMES symbol, which indicates
1775 that the times() routine exists. The times() routine is normaly
1776 provided on UNIX systems. You may have to include <sys/times.h>.
1778 d_truncate (d_truncate.U):
1779 This variable conditionally defines HAS_TRUNCATE if truncate() is
1780 available to truncate files.
1782 d_tzname (d_tzname.U):
1783 This variable conditionally defines HAS_TZNAME if tzname[] is
1784 available to access timezone names.
1786 d_u32align (d_u32align.U):
1787 This variable tells whether you must access character data
1788 through U32-aligned pointers.
1790 d_ualarm (d_ualarm.U):
1791 This variable conditionally defines the HAS_UALARM symbol, which
1792 indicates to the C program that the ualarm() routine is available.
1794 d_umask (d_umask.U):
1795 This variable conditionally defines the HAS_UMASK symbol, which
1796 indicates to the C program that the umask() routine is available.
1797 to set and get the value of the file creation mask.
1799 d_uname (d_gethname.U):
1800 This variable conditionally defines the HAS_UNAME symbol, which
1801 indicates to the C program that the uname() routine may be
1802 used to derive the host name.
1804 d_union_semun (d_union_semun.U):
1805 This variable conditionally defines HAS_UNION_SEMUN if the
1806 union semun is defined by including <sys/sem.h>.
1808 d_unordered (d_unordered.U):
1809 This variable conditionally defines the HAS_UNORDERED symbol, which
1810 indicates to the C program that the unordered() routine is available.
1812 d_usleep (d_usleep.U):
1813 This variable conditionally defines HAS_USLEEP if usleep() is
1814 available to do high granularity sleeps.
1816 d_usleepproto (d_usleepproto.U):
1817 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
1818 which indicates to the C program that the system provides
1819 a prototype for the usleep() function. Otherwise, it is
1820 up to the program to supply one.
1822 d_ustat (d_ustat.U):
1823 This variable conditionally defines HAS_USTAT if ustat() is
1824 available to query file system statistics by dev_t.
1826 d_vendorarch (vendorarch.U):
1827 This variable conditionally defined PERL_VENDORARCH.
1829 d_vendorbin (vendorbin.U):
1830 This variable conditionally defines PERL_VENDORBIN.
1832 d_vendorlib (vendorlib.U):
1833 This variable conditionally defines PERL_VENDORLIB.
1835 d_vfork (d_vfork.U):
1836 This variable conditionally defines the HAS_VFORK symbol, which
1837 indicates the vfork() routine is available.
1839 d_void_closedir (d_closedir.U):
1840 This variable conditionally defines VOID_CLOSEDIR if closedir()
1841 does not return a value.
1843 d_voidsig (d_voidsig.U):
1844 This variable conditionally defines VOIDSIG if this system
1845 declares "void (*signal(...))()" in signal.h. The old way was to
1846 declare it as "int (*signal(...))()".
1848 d_voidtty (i_sysioctl.U):
1849 This variable conditionally defines USE_IOCNOTTY to indicate that the
1850 ioctl() call with TIOCNOTTY should be used to void tty association.
1851 Otherwise (on USG probably), it is enough to close the standard file
1852 decriptors and do a setpgrp().
1854 d_volatile (d_volatile.U):
1855 This variable conditionally defines the HASVOLATILE symbol, which
1856 indicates to the C program that this C compiler knows about the
1857 volatile declaration.
1859 d_vprintf (d_vprintf.U):
1860 This variable conditionally defines the HAS_VPRINTF symbol, which
1861 indicates to the C program that the vprintf() routine is available
1862 to printf with a pointer to an argument list.
1864 d_wait4 (d_wait4.U):
1865 This variable conditionally defines the HAS_WAIT4 symbol, which
1866 indicates the wait4() routine is available.
1868 d_waitpid (d_waitpid.U):
1869 This variable conditionally defines HAS_WAITPID if waitpid() is
1870 available to wait for child process.
1872 d_wcstombs (d_wcstombs.U):
1873 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1874 indicates to the C program that the wcstombs() routine is available
1875 to convert wide character strings to multibyte strings.
1877 d_wctomb (d_wctomb.U):
1878 This variable conditionally defines the HAS_WCTOMB symbol, which
1879 indicates to the C program that the wctomb() routine is available
1880 to convert a wide character to a multibyte.
1882 d_writev (d_writev.U):
1883 This variable conditionally defines the HAS_WRITEV symbol, which
1884 indicates to the C program that the writev() routine is available.
1887 This variable conditionally defines the symbol XENIX, which alerts
1888 the C program that it runs under Xenix.
1891 This variable is used internally by Configure to determine the
1892 full pathname (if any) of the date program. After Configure runs,
1893 the value is reset to a plain "date" and is not useful.
1895 db_hashtype (i_db.U):
1896 This variable contains the type of the hash structure element
1897 in the <db.h> header file. In older versions of DB, it was
1898 int, while in newer ones it is u_int32_t.
1900 db_prefixtype (i_db.U):
1901 This variable contains the type of the prefix structure element
1902 in the <db.h> header file. In older versions of DB, it was
1903 int, while in newer ones it is size_t.
1905 db_version_major (i_db.U):
1906 This variable contains the major version number of
1907 Berkeley DB found in the <db.h> header file.
1909 db_version_minor (i_db.U):
1910 This variable contains the minor version number of
1911 Berkeley DB found in the <db.h> header file.
1912 For DB version 1 this is always 0.
1914 db_version_patch (i_db.U):
1915 This variable contains the patch version number of
1916 Berkeley DB found in the <db.h> header file.
1917 For DB version 1 this is always 0.
1919 defvoidused (voidflags.U):
1920 This variable contains the default value of the VOIDUSED symbol (15).
1922 direntrytype (i_dirent.U):
1923 This symbol is set to 'struct direct' or 'struct dirent' depending on
1924 whether dirent is available or not. You should use this pseudo type to
1925 portably declare your directory entries.
1928 This variable contains the extension that is to be used for the
1929 dynamically loaded modules that perl generaties.
1932 This variable contains the name of the dynamic loading file that
1933 will be used with the package.
1935 doublesize (doublesize.U):
1936 This variable contains the value of the DOUBLESIZE symbol, which
1937 indicates to the C program how many bytes there are in a double.
1939 drand01 (randfunc.U):
1940 Indicates the macro to be used to generate normalized
1941 random numbers. Uses randfunc, often divided by
1942 (double) (((unsigned long) 1 << randbits)) in order to
1943 normalize the result.
1944 In C programs, the macro 'Drand01' is mapped to drand01.
1946 dynamic_ext (Extensions.U):
1947 This variable holds a list of XS extension files we want to
1948 link dynamically into the package. It is used by Makefile.
1950 eagain (nblock_io.U):
1951 This variable bears the symbolic errno code set by read() when no
1952 data is present on the file and non-blocking I/O was enabled (otherwise,
1953 read() blocks naturally).
1956 This variable conditionally defines EBCDIC if this
1957 system uses EBCDIC encoding. Among other things, this
1958 means that the character ranges are not contiguous.
1962 This variable is used internally by Configure to determine the
1963 full pathname (if any) of the echo program. After Configure runs,
1964 the value is reset to a plain "echo" and is not useful.
1967 This variable is used internally by Configure to determine the
1968 full pathname (if any) of the egrep program. After Configure runs,
1969 the value is reset to a plain "egrep" and is not useful.
1972 This variable is defined but not used by Configure.
1973 The value is a plain '' and is not useful.
1976 When running under Eunice this variable contains a command which will
1977 convert a shell script to the proper form of text file for it to be
1978 executable by the shell. On other systems it is a no-op.
1981 This is an old synonym for _exe.
1984 This variable is used internally by Configure to determine the
1985 full pathname (if any) of the expr program. After Configure runs,
1986 the value is reset to a plain "expr" and is not useful.
1988 extensions (Extensions.U):
1989 This variable holds a list of all extension files (both XS and
1990 non-xs linked into the package. It is propagated to Config.pm
1991 and is typically used to test whether a particular extesion
1995 This variable holds a list of extra modules to install.
1997 fflushall (fflushall.U):
1998 This symbol, if defined, tells that to flush
1999 all pending stdio output one must loop through all
2000 the stdio file handles stored in an array and fflush them.
2001 Note that if fflushNULL is defined, fflushall will not
2002 even be probed for and will be left undefined.
2004 fflushNULL (fflushall.U):
2005 This symbol, if defined, tells that fflush(NULL) does flush
2006 all pending stdio output.
2009 This variable is defined but not used by Configure.
2010 The value is a plain '' and is not useful.
2012 firstmakefile (Unix.U):
2013 This variable defines the first file searched by make. On unix,
2014 it is makefile (then Makefile). On case-insensitive systems,
2015 it might be something else. This is only used to deal with
2016 convoluted make depend tricks.
2019 This variable is defined but not used by Configure.
2020 The value is a plain '' and is not useful.
2022 fpossize (fpossize.U):
2023 This variable contains the size of a fpostype in bytes.
2025 fpostype (fpostype.U):
2026 This variable defines Fpos_t to be something like fpos_t, long,
2027 uint, or whatever type is used to declare file positions in libc.
2029 freetype (mallocsrc.U):
2030 This variable contains the return type of free(). It is usually
2031 void, but occasionally int.
2034 This variable contains the command used by Configure
2035 to copy files from the target host. Useful and available
2036 only during Perl build.
2037 The string ':' if not cross-compiling.
2040 This variable contains the full pathname to 'ar', whether or
2041 not the user has specified 'portability'. This is only used
2045 This variable contains the full pathname to 'csh', whether or
2046 not the user has specified 'portability'. This is only used
2047 in the compiled C program, and we assume that all systems which
2048 can share this executable will have the same full pathname to
2051 full_sed (Loc_sed.U):
2052 This variable contains the full pathname to 'sed', whether or
2053 not the user has specified 'portability'. This is only used
2054 in the compiled C program, and we assume that all systems which
2055 can share this executable will have the same full pathname to
2058 gccosandvers (gccvers.U):
2059 If GNU cc (gcc) is used, this variable the operating system and
2060 version used to compile the gcc. It is set to '' if not gcc,
2061 or if nothing useful can be parsed as the os version.
2063 gccversion (gccvers.U):
2064 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2065 indicate whether the compiler is version 1 or 2. This is used in
2066 setting some of the default cflags. It is set to '' if not gcc.
2069 This variable contains the format string used for printing a Gid_t.
2071 gidsign (gidsign.U):
2072 This variable contains the signedness of a gidtype.
2073 1 for unsigned, -1 for signed.
2075 gidsize (gidsize.U):
2076 This variable contains the size of a gidtype in bytes.
2078 gidtype (gidtype.U):
2079 This variable defines Gid_t to be something like gid_t, int,
2080 ushort, or whatever type is used to declare the return type
2081 of getgid(). Typically, it is the type of group ids in the kernel.
2084 This variable holds the general path (space-separated) used to
2085 find libraries. It may contain directories that do not exist on
2086 this platform, libpth is the cleaned-up version.
2089 This variable is used internally by Configure to determine the
2090 full pathname (if any) of the grep program. After Configure runs,
2091 the value is reset to a plain "grep" and is not useful.
2094 This variable contains a command that produces the text of the
2095 /etc/group file. This is normally "cat /etc/group", but can be
2096 "ypcat group" when NIS is used.
2097 On some systems, such as os390, there may be no equivalent
2098 command, in which case this variable is unset.
2100 groupstype (groupstype.U):
2101 This variable defines Groups_t to be something like gid_t, int,
2102 ushort, or whatever type is used for the second argument to
2103 getgroups() and setgroups(). Usually, this is the same as
2104 gidtype (gid_t), but sometimes it isn't.
2107 This variable is used internally by Configure to determine the
2108 full pathname (if any) of the gzip program. After Configure runs,
2109 the value is reset to a plain "gzip" and is not useful.
2111 h_fcntl (h_fcntl.U):
2112 This is variable gets set in various places to tell i_fcntl that
2113 <fcntl.h> should be included.
2115 h_sysfile (h_sysfile.U):
2116 This is variable gets set in various places to tell i_sys_file that
2117 <sys/file.h> should be included.
2120 Gives the type of hints used for previous answers. May be one of
2121 "default", "recommended" or "previous".
2124 This variable contains a command that produces the text of the
2125 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2126 "ypcat hosts" when NIS is used.
2127 On some systems, such as os390, there may be no equivalent
2128 command, in which case this variable is unset.
2131 This variable is the size of an I16 in bytes.
2134 This variable contains the C type used for Perl's I16.
2137 This variable is the size of an I32 in bytes.
2140 This variable contains the C type used for Perl's I32.
2143 This variable is the size of an I64 in bytes.
2146 This variable contains the C type used for Perl's I64.
2149 This variable is the size of an I8 in bytes.
2152 This variable contains the C type used for Perl's I8.
2154 i_arpainet (i_arpainet.U):
2155 This variable conditionally defines the I_ARPA_INET symbol,
2156 and indicates whether a C program should include <arpa/inet.h>.
2158 i_bsdioctl (i_sysioctl.U):
2159 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2160 indicates to the C program that <sys/bsdioctl.h> exists and should
2164 This variable conditionally defines the I_DB symbol, and indicates
2165 whether a C program may include Berkeley's DB include file <db.h>.
2168 This variable conditionally defines the I_DBM symbol, which
2169 indicates to the C program that <dbm.h> exists and should
2172 i_dirent (i_dirent.U):
2173 This variable conditionally defines I_DIRENT, which indicates
2174 to the C program that it should include <dirent.h>.
2177 This variable conditionally defines the I_DLD symbol, which
2178 indicates to the C program that <dld.h> (GNU dynamic loading)
2179 exists and should be included.
2181 i_dlfcn (i_dlfcn.U):
2182 This variable conditionally defines the I_DLFCN symbol, which
2183 indicates to the C program that <dlfcn.h> exists and should
2186 i_fcntl (i_fcntl.U):
2187 This variable controls the value of I_FCNTL (which tells
2188 the C program to include <fcntl.h>).
2190 i_float (i_float.U):
2191 This variable conditionally defines the I_FLOAT symbol, and indicates
2192 whether a C program may include <float.h> to get symbols like DBL_MAX
2193 or DBL_MIN, i.e. machine dependent floating point values.
2196 This variable conditionally defines the I_FP symbol, and indicates
2197 whether a C program should include <fp.h>.
2199 i_fp_class (i_fp_class.U):
2200 This variable conditionally defines the I_FP_CLASS symbol, and indicates
2201 whether a C program should include <fp_class.h>.
2204 This variable conditionally defines the I_GDBM symbol, which
2205 indicates to the C program that <gdbm.h> exists and should
2209 This variable conditionally defines the I_GRP symbol, and indicates
2210 whether a C program should include <grp.h>.
2212 i_ieeefp (i_ieeefp.U):
2213 This variable conditionally defines the I_IEEEFP symbol, and indicates
2214 whether a C program should include <ieeefp.h>.
2216 i_inttypes (i_inttypes.U):
2217 This variable conditionally defines the I_INTTYPES symbol,
2218 and indicates whether a C program should include <inttypes.h>.
2220 i_langinfo (i_langinfo.U):
2221 This variable conditionally defines the I_LANGINFO symbol,
2222 and indicates whether a C program should include <langinfo.h>.
2224 i_libutil (i_libutil.U):
2225 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2226 whether a C program should include <libutil.h>.
2228 i_limits (i_limits.U):
2229 This variable conditionally defines the I_LIMITS symbol, and indicates
2230 whether a C program may include <limits.h> to get symbols like WORD_BIT
2233 i_locale (i_locale.U):
2234 This variable conditionally defines the I_LOCALE symbol,
2235 and indicates whether a C program should include <locale.h>.
2237 i_machcthr (i_machcthr.U):
2238 This variable conditionally defines the I_MACH_CTHREADS symbol,
2239 and indicates whether a C program should include <mach/cthreads.h>.
2241 i_malloc (i_malloc.U):
2242 This variable conditionally defines the I_MALLOC symbol, and indicates
2243 whether a C program should include <malloc.h>.
2246 This variable conditionally defines the I_MATH symbol, and indicates
2247 whether a C program may include <math.h>.
2249 i_memory (i_memory.U):
2250 This variable conditionally defines the I_MEMORY symbol, and indicates
2251 whether a C program should include <memory.h>.
2253 i_mntent (i_mntent.U):
2254 This variable conditionally defines the I_MNTENT symbol, and indicates
2255 whether a C program should include <mntent.h>.
2258 This variable conditionally defines the I_NDBM symbol, which
2259 indicates to the C program that <ndbm.h> exists and should
2262 i_netdb (i_netdb.U):
2263 This variable conditionally defines the I_NETDB symbol, and indicates
2264 whether a C program should include <netdb.h>.
2266 i_neterrno (i_neterrno.U):
2267 This variable conditionally defines the I_NET_ERRNO symbol, which
2268 indicates to the C program that <net/errno.h> exists and should
2271 i_netinettcp (i_netinettcp.U):
2272 This variable conditionally defines the I_NETINET_TCP symbol,
2273 and indicates whether a C program should include <netinet/tcp.h>.
2276 This variable conditionally defines I_NETINET_IN, which indicates
2277 to the C program that it should include <netinet/in.h>. Otherwise,
2278 you may try <sys/in.h>.
2281 This variable conditionally defines the I_POLL symbol, and indicates
2282 whether a C program should include <poll.h>.
2285 This variable conditionally defines the I_PROT symbol, and indicates
2286 whether a C program should include <prot.h>.
2288 i_pthread (i_pthread.U):
2289 This variable conditionally defines the I_PTHREAD symbol,
2290 and indicates whether a C program should include <pthread.h>.
2293 This variable conditionally defines I_PWD, which indicates
2294 to the C program that it should include <pwd.h>.
2296 i_rpcsvcdbm (i_dbm.U):
2297 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2298 indicates to the C program that <rpcsvc/dbm.h> exists and should
2299 be included. Some System V systems might need this instead of <dbm.h>.
2302 This variable conditionally defines the I_SFIO symbol,
2303 and indicates whether a C program should include <sfio.h>.
2305 i_sgtty (i_termio.U):
2306 This variable conditionally defines the I_SGTTY symbol, which
2307 indicates to the C program that it should include <sgtty.h> rather
2310 i_shadow (i_shadow.U):
2311 This variable conditionally defines the I_SHADOW symbol, and indicates
2312 whether a C program should include <shadow.h>.
2314 i_socks (i_socks.U):
2315 This variable conditionally defines the I_SOCKS symbol, and indicates
2316 whether a C program should include <socks.h>.
2318 i_stdarg (i_varhdr.U):
2319 This variable conditionally defines the I_STDARG symbol, which
2320 indicates to the C program that <stdarg.h> exists and should
2323 i_stddef (i_stddef.U):
2324 This variable conditionally defines the I_STDDEF symbol, which
2325 indicates to the C program that <stddef.h> exists and should
2328 i_stdlib (i_stdlib.U):
2329 This variable conditionally defines the I_STDLIB symbol, which
2330 indicates to the C program that <stdlib.h> exists and should
2333 i_string (i_string.U):
2334 This variable conditionally defines the I_STRING symbol, which
2335 indicates that <string.h> should be included rather than <strings.h>.
2337 i_sunmath (i_sunmath.U):
2338 This variable conditionally defines the I_SUNMATH symbol, and indicates
2339 whether a C program should include <sunmath.h>.
2341 i_sysaccess (i_sysaccess.U):
2342 This variable conditionally defines the I_SYS_ACCESS symbol,
2343 and indicates whether a C program should include <sys/access.h>.
2345 i_sysdir (i_sysdir.U):
2346 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2347 whether a C program should include <sys/dir.h>.
2349 i_sysfile (i_sysfile.U):
2350 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2351 whether a C program should include <sys/file.h> to get R_OK and friends.
2353 i_sysfilio (i_sysioctl.U):
2354 This variable conditionally defines the I_SYS_FILIO symbol, which
2355 indicates to the C program that <sys/filio.h> exists and should
2356 be included in preference to <sys/ioctl.h>.
2359 This variable conditionally defines I_SYS_IN, which indicates
2360 to the C program that it should include <sys/in.h> instead of
2363 i_sysioctl (i_sysioctl.U):
2364 This variable conditionally defines the I_SYS_IOCTL symbol, which
2365 indicates to the C program that <sys/ioctl.h> exists and should
2368 i_syslog (i_syslog.U):
2369 This variable conditionally defines the I_SYSLOG symbol,
2370 and indicates whether a C program should include <syslog.h>.
2372 i_sysmman (i_sysmman.U):
2373 This variable conditionally defines the I_SYS_MMAN symbol, and
2374 indicates whether a C program should include <sys/mman.h>.
2376 i_sysmode (i_sysmode.U):
2377 This variable conditionally defines the I_SYSMODE symbol,
2378 and indicates whether a C program should include <sys/mode.h>.
2380 i_sysmount (i_sysmount.U):
2381 This variable conditionally defines the I_SYSMOUNT symbol,
2382 and indicates whether a C program should include <sys/mount.h>.
2384 i_sysndir (i_sysndir.U):
2385 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2386 whether a C program should include <sys/ndir.h>.
2388 i_sysparam (i_sysparam.U):
2389 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2390 whether a C program should include <sys/param.h>.
2392 i_sysresrc (i_sysresrc.U):
2393 This variable conditionally defines the I_SYS_RESOURCE symbol,
2394 and indicates whether a C program should include <sys/resource.h>.
2396 i_syssecrt (i_syssecrt.U):
2397 This variable conditionally defines the I_SYS_SECURITY symbol,
2398 and indicates whether a C program should include <sys/security.h>.
2400 i_sysselct (i_sysselct.U):
2401 This variable conditionally defines I_SYS_SELECT, which indicates
2402 to the C program that it should include <sys/select.h> in order to
2403 get the definition of struct timeval.
2405 i_syssockio (i_sysioctl.U):
2406 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2407 C program that socket ioctl codes may be found in <sys/sockio.h>
2408 instead of <sys/ioctl.h>.
2410 i_sysstat (i_sysstat.U):
2411 This variable conditionally defines the I_SYS_STAT symbol,
2412 and indicates whether a C program should include <sys/stat.h>.
2414 i_sysstatfs (i_sysstatfs.U):
2415 This variable conditionally defines the I_SYSSTATFS symbol,
2416 and indicates whether a C program should include <sys/statfs.h>.
2418 i_sysstatvfs (i_sysstatvfs.U):
2419 This variable conditionally defines the I_SYSSTATVFS symbol,
2420 and indicates whether a C program should include <sys/statvfs.h>.
2422 i_systime (i_time.U):
2423 This variable conditionally defines I_SYS_TIME, which indicates
2424 to the C program that it should include <sys/time.h>.
2426 i_systimek (i_time.U):
2427 This variable conditionally defines I_SYS_TIME_KERNEL, which
2428 indicates to the C program that it should include <sys/time.h>
2429 with KERNEL defined.
2431 i_systimes (i_systimes.U):
2432 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2433 whether a C program should include <sys/times.h>.
2435 i_systypes (i_systypes.U):
2436 This variable conditionally defines the I_SYS_TYPES symbol,
2437 and indicates whether a C program should include <sys/types.h>.
2439 i_sysuio (i_sysuio.U):
2440 This variable conditionally defines the I_SYSUIO symbol, and indicates
2441 whether a C program should include <sys/uio.h>.
2443 i_sysun (i_sysun.U):
2444 This variable conditionally defines I_SYS_UN, which indicates
2445 to the C program that it should include <sys/un.h> to get UNIX
2446 domain socket definitions.
2448 i_sysutsname (i_sysutsname.U):
2449 This variable conditionally defines the I_SYSUTSNAME symbol,
2450 and indicates whether a C program should include <sys/utsname.h>.
2452 i_sysvfs (i_sysvfs.U):
2453 This variable conditionally defines the I_SYSVFS symbol,
2454 and indicates whether a C program should include <sys/vfs.h>.
2456 i_syswait (i_syswait.U):
2457 This variable conditionally defines I_SYS_WAIT, which indicates
2458 to the C program that it should include <sys/wait.h>.
2460 i_termio (i_termio.U):
2461 This variable conditionally defines the I_TERMIO symbol, which
2462 indicates to the C program that it should include <termio.h> rather
2465 i_termios (i_termio.U):
2466 This variable conditionally defines the I_TERMIOS symbol, which
2467 indicates to the C program that the POSIX <termios.h> file is
2471 This variable conditionally defines I_TIME, which indicates
2472 to the C program that it should include <time.h>.
2474 i_unistd (i_unistd.U):
2475 This variable conditionally defines the I_UNISTD symbol, and indicates
2476 whether a C program should include <unistd.h>.
2478 i_ustat (i_ustat.U):
2479 This variable conditionally defines the I_USTAT symbol, and indicates
2480 whether a C program should include <ustat.h>.
2482 i_utime (i_utime.U):
2483 This variable conditionally defines the I_UTIME symbol, and indicates
2484 whether a C program should include <utime.h>.
2486 i_values (i_values.U):
2487 This variable conditionally defines the I_VALUES symbol, and indicates
2488 whether a C program may include <values.h> to get symbols like MAXLONG
2491 i_varargs (i_varhdr.U):
2492 This variable conditionally defines I_VARARGS, which indicates
2493 to the C program that it should include <varargs.h>.
2495 i_varhdr (i_varhdr.U):
2496 Contains the name of the header to be included to get va_dcl definition.
2497 Typically one of varargs.h or stdarg.h.
2499 i_vfork (i_vfork.U):
2500 This variable conditionally defines the I_VFORK symbol, and indicates
2501 whether a C program should include vfork.h.
2503 ignore_versioned_solibs (libs.U):
2504 This variable should be non-empty if non-versioned shared
2505 libraries (libfoo.so.x.y) are to be ignored (because they
2506 cannot be linked against).
2508 inc_version_list (inc_version_list.U):
2509 This variable specifies the list of subdirectories in over
2510 which perl.c:incpush() and lib/lib.pm will automatically
2511 search when adding directories to @INC. The elements in
2512 the list are separated by spaces. This is only useful
2513 if you have a perl library directory tree structured like the
2514 default one. See INSTALL for how this works. The versioned
2515 site_perl directory was introduced in 5.005, so that is the
2516 lowest possible value.
2518 inc_version_list_init (inc_version_list.U):
2519 This variable holds the same list as inc_version_list, but
2520 each item is enclosed in double quotes and separated by commas,
2521 suitable for use in the PERL_INC_VERSION_LIST initialization.
2524 This variable must preceed the normal include path to get hte
2525 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2526 Value can be "" or "/bsd43" on mips.
2529 This variable is defined but not used by Configure.
2530 The value is a plain '' and is not useful.
2532 installarchlib (archlib.U):
2533 This variable is really the same as archlibexp but may differ on
2534 those systems using AFS. For extra portability, only this variable
2535 should be used in makefiles.
2538 This variable is the same as binexp unless AFS is running in which case
2539 the user is explicitely prompted for it. This variable should always
2540 be used in your makefiles for maximum portability.
2542 installman1dir (man1dir.U):
2543 This variable is really the same as man1direxp, unless you are using
2544 AFS in which case it points to the read/write location whereas
2545 man1direxp only points to the read-only access location. For extra
2546 portability, you should only use this variable within your makefiles.
2548 installman3dir (man3dir.U):
2549 This variable is really the same as man3direxp, unless you are using
2550 AFS in which case it points to the read/write location whereas
2551 man3direxp only points to the read-only access location. For extra
2552 portability, you should only use this variable within your makefiles.
2554 installprefix (installprefix.U):
2555 This variable holds the name of the directory below which
2556 "make install" will install the package. For most users, this
2557 is the same as prefix. However, it is useful for
2558 installing the software into a different (usually temporary)
2559 location after which it can be bundled up and moved somehow
2560 to the final location specified by prefix.
2562 installprefixexp (installprefix.U):
2563 This variable holds the full absolute path of installprefix
2564 with all ~-expansion done.
2566 installprivlib (privlib.U):
2567 This variable is really the same as privlibexp but may differ on
2568 those systems using AFS. For extra portability, only this variable
2569 should be used in makefiles.
2571 installscript (scriptdir.U):
2572 This variable is usually the same as scriptdirexp, unless you are on
2573 a system running AFS, in which case they may differ slightly. You
2574 should always use this variable within your makefiles for portability.
2576 installsitearch (sitearch.U):
2577 This variable is really the same as sitearchexp but may differ on
2578 those systems using AFS. For extra portability, only this variable
2579 should be used in makefiles.
2581 installsitebin (sitebin.U):
2582 This variable is usually the same as sitebinexp, unless you are on
2583 a system running AFS, in which case they may differ slightly. You
2584 should always use this variable within your makefiles for portability.
2586 installsitelib (sitelib.U):
2587 This variable is really the same as sitelibexp but may differ on
2588 those systems using AFS. For extra portability, only this variable
2589 should be used in makefiles.
2591 installstyle (installstyle.U):
2592 This variable describes the "style" of the perl installation.
2593 This is intended to be useful for tools that need to
2594 manipulate entire perl distributions. Perl itself doesn't use
2595 this to find its libraries -- the library directories are
2596 stored directly in Config.pm. Currently, there are only two
2597 styles: "lib" and "lib/perl5". The default library locations
2598 (e.g. privlib, sitelib) are either $prefix/lib or
2599 $prefix/lib/perl5. The former is useful if $prefix is a
2600 directory dedicated to perl (e.g. /opt/perl), while the latter
2601 is useful if $prefix is shared by many packages, e.g. if
2603 This may later be extended to include other information, so
2604 be careful with pattern-matching on the results.
2605 For compatibility with perl5.005 and earlier, the default
2606 setting is based on whether or not $prefix contains the string
2609 installusrbinperl (instubperl.U):
2610 This variable tells whether Perl should be installed also as
2611 /usr/bin/perl in addition to
2614 installvendorarch (vendorarch.U):
2615 This variable is really the same as vendorarchexp but may differ on
2616 those systems using AFS. For extra portability, only this variable
2617 should be used in makefiles.
2619 installvendorbin (vendorbin.U):
2620 This variable is really the same as vendorbinexp but may differ on
2621 those systems using AFS. For extra portability, only this variable
2622 should be used in makefiles.
2624 installvendorlib (vendorlib.U):
2625 This variable is really the same as vendorlibexp but may differ on
2626 those systems using AFS. For extra portability, only this variable
2627 should be used in makefiles.
2629 intsize (intsize.U):
2630 This variable contains the value of the INTSIZE symbol, which
2631 indicates to the C program how many bytes there are in an int.
2633 issymlink (issymlink.U):
2634 This variable holds the test command to test for a symbolic link
2635 (if they are supported). Typical values include 'test -h' and
2638 ivdformat (perlxvf.U):
2639 This variable contains the format string used for printing
2640 a Perl IV as a signed decimal integer.
2643 This variable is the size of an IV in bytes.
2646 This variable contains the C type used for Perl's IV.
2648 known_extensions (Extensions.U):
2649 This variable holds a list of all XS extensions included in
2653 This variable is defined but not used by Configure.
2654 The value is a plain '' and is not useful.
2657 This variable indicates the program to be used to link
2658 libraries for dynamic loading. On some systems, it is 'ld'.
2659 On ELF systems, it should be $cc. Mostly, we'll try to respect
2660 the hint file setting.
2662 lddlflags (dlsrc.U):
2663 This variable contains any special flags that might need to be
2664 passed to $ld to create a shared library suitable for dynamic
2665 loading. It is up to the makefile to use it. For hpux, it
2666 should be '-b'. For sunos 4.1, it is empty.
2668 ldflags (ccflags.U):
2669 This variable contains any additional C loader flags desired by
2670 the user. It is up to the Makefile to use this.
2672 ldflags_uselargefiles (uselfs.U):
2673 This variable contains the loader flags needed by large file builds
2674 and added to ldflags by hints files.
2676 ldlibpthname (libperl.U):
2677 This variable holds the name of the shared library
2678 search path, often LD_LIBRARY_PATH. To get an empty
2679 string, the hints file must set this to 'none'.
2682 This variable is used internally by Configure to determine the
2683 full pathname (if any) of the less program. After Configure runs,
2684 the value is reset to a plain "less" and is not useful.
2687 This is an old synonym for _a.
2690 This variable contains the location of the C library.
2692 libperl (libperl.U):
2693 The perl executable is obtained by linking perlmain.c with
2694 libperl, any static extensions (usually just DynaLoader),
2695 and any other libraries needed on this system. libperl
2696 is usually libperl.a, but can also be libperl.so.xxx if
2697 the user wishes to build a perl executable with a shared
2701 This variable holds the general path (space-separated) used to find
2702 libraries. It is intended to be used by other units.
2705 This variable holds the additional libraries we want to use.
2706 It is up to the Makefile to deal with it.
2709 This variable holds the directory names aka dirnames of the libraries
2710 we found and accepted, duplicates are removed.
2713 This variable holds the filenames aka basenames of the libraries
2714 we found and accepted.
2717 This variable holds the full pathnames of the libraries
2718 we found and accepted.
2721 This variable holds the directory names probed for libraries.
2723 libswanted (Myinit.U):
2724 This variable holds a list of all the libraries we want to
2725 search. The order is chosen to pick up the c library
2726 ahead of ucb or bsd libraries for SVR4.
2728 libswanted_uselargefiles (uselfs.U):
2729 This variable contains the libraries needed by large file builds
2730 and added to ldflags by hints files. It is a space separated list
2731 of the library names without the "lib" prefix or any suffix, just
2735 This variable is defined but not used by Configure.
2736 The value is a plain '' and is not useful.
2739 This variable is defined but not used by Configure.
2740 The value is a plain '' and is not useful.
2742 lkflags (ccflags.U):
2743 This variable contains any additional C partial linker flags desired by
2744 the user. It is up to the Makefile to use this.
2747 This variable is used internally by Configure to determine the
2748 full pathname (if any) of the ln program. After Configure runs,
2749 the value is reset to a plain "ln" and is not useful.
2752 This variable holds the name of the command to make
2753 symbolic links (if they are supported). It can be used
2754 in the Makefile. It is either 'ln -s' or 'ln'
2756 locincpth (ccflags.U):
2757 This variable contains a list of additional directories to be
2758 searched by the compiler. The appropriate '-I' directives will
2759 be added to ccflags. This is intended to simplify setting
2760 local directories from the Configure command line.
2761 It's not much, but it parallels the loclibpth stuff in libpth.U.
2763 loclibpth (libpth.U):
2764 This variable holds the paths (space-separated) used to find local
2765 libraries. It is prepended to libpth, and is intended to be easily
2766 set from the command line.
2768 longdblsize (d_longdbl.U):
2769 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2770 indicates to the C program how many bytes there are in a long double,
2771 if this system supports long doubles.
2773 longlongsize (d_longlong.U):
2774 This variable contains the value of the LONGLONGSIZE symbol, which
2775 indicates to the C program how many bytes there are in a long long,
2776 if this system supports long long.
2778 longsize (intsize.U):
2779 This variable contains the value of the LONGSIZE symbol, which
2780 indicates to the C program how many bytes there are in a long.
2783 This variable is defined but not used by Configure.
2784 The value is a plain '' and is not useful.
2787 This variable is defined but not used by Configure.
2788 The value is a plain '' and is not useful.
2791 This variable is used internally by Configure to determine the
2792 full pathname (if any) of the ls program. After Configure runs,
2793 the value is reset to a plain "ls" and is not useful.
2795 lseeksize (lseektype.U):
2796 This variable defines lseektype to be something like off_t, long,
2797 or whatever type is used to declare lseek offset's type in the
2798 kernel (which also appears to be lseek's return type).
2800 lseektype (lseektype.U):
2801 This variable defines lseektype to be something like off_t, long,
2802 or whatever type is used to declare lseek offset's type in the
2803 kernel (which also appears to be lseek's return type).
2806 This variable is defined but not used by Configure.
2807 The value is a plain '' and is not useful.
2810 This variable is defined but not used by Configure.
2811 The value is a plain '' and is not useful.
2814 This variable is used internally by Configure to determine the
2815 full pathname (if any) of the make program. After Configure runs,
2816 the value is reset to a plain "make" and is not useful.
2818 make_set_make (make.U):
2819 Some versions of 'make' set the variable MAKE. Others do not.
2820 This variable contains the string to be included in Makefile.SH
2821 so that MAKE is set if needed, and not if not needed.
2822 Possible values are:
2823 make_set_make='#' # If your make program handles this for you,
2824 make_set_make="MAKE=$make" # if it doesn't.
2825 I used a comment character so that we can distinguish a
2826 'set' value (from a previous config.sh or Configure '-D' option)
2827 from an uncomputed value.
2829 mallocobj (mallocsrc.U):
2830 This variable contains the name of the malloc.o that this package
2831 generates, if that malloc.o is preferred over the system malloc.
2832 Otherwise the value is null. This variable is intended for generating
2833 Makefiles. See mallocsrc.
2835 mallocsrc (mallocsrc.U):
2836 This variable contains the name of the malloc.c that comes with
2837 the package, if that malloc.c is preferred over the system malloc.
2838 Otherwise the value is null. This variable is intended for generating
2841 malloctype (mallocsrc.U):
2842 This variable contains the kind of ptr returned by malloc and realloc.
2844 man1dir (man1dir.U):
2845 This variable contains the name of the directory in which manual
2846 source pages are to be put. It is the responsibility of the
2847 Makefile.SH to get the value of this into the proper command.
2848 You must be prepared to do the ~name expansion yourself.
2850 man1direxp (man1dir.U):
2851 This variable is the same as the man1dir variable, but is filename
2852 expanded at configuration time, for convenient use in makefiles.
2854 man1ext (man1dir.U):
2855 This variable contains the extension that the manual page should
2856 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2859 man3dir (man3dir.U):
2860 This variable contains the name of the directory in which manual
2861 source pages are to be put. It is the responsibility of the
2862 Makefile.SH to get the value of this into the proper command.
2863 You must be prepared to do the ~name expansion yourself.
2865 man3direxp (man3dir.U):
2866 This variable is the same as the man3dir variable, but is filename
2867 expanded at configuration time, for convenient use in makefiles.
2869 man3ext (man3dir.U):
2870 This variable contains the extension that the manual page should
2871 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2875 This variable is used internally by Configure to determine the
2876 full pathname (if any) of the Mcc program. After Configure runs,
2877 the value is reset to a plain "Mcc" and is not useful.
2879 mips_type (usrinc.U):
2880 This variable holds the environment type for the mips system.
2881 Possible values are "BSD 4.3" and "System V".
2884 This variable is used internally by Configure to determine the
2885 full pathname (if any) of the mkdir program. After Configure runs,
2886 the value is reset to a plain "mkdir" and is not useful.
2888 mmaptype (d_mmap.U):
2889 This symbol contains the type of pointer returned by mmap()
2890 (and simultaneously the type of the first argument).
2891 It can be 'void *' or 'caddr_t'.
2893 modetype (modetype.U):
2894 This variable defines modetype to be something like mode_t,
2895 int, unsigned short, or whatever type is used to declare file
2896 modes for system calls.
2899 This variable is used internally by Configure to determine the
2900 full pathname (if any) of the more program. After Configure runs,
2901 the value is reset to a plain "more" and is not useful.
2903 multiarch (multiarch.U):
2904 This variable conditionally defines the MULTIARCH symbol
2905 which signifies the presence of multiplatform files.
2906 This is normally set by hints files.
2909 This variable is defined but not used by Configure.
2910 The value is a plain '' and is not useful.
2912 myarchname (archname.U):
2913 This variable holds the architecture name computed by Configure in
2914 a previous run. It is not intended to be perused by any user and
2915 should never be set in a hint file.
2917 mydomain (myhostname.U):
2918 This variable contains the eventual value of the MYDOMAIN symbol,
2919 which is the domain of the host the program is going to run on.
2920 The domain must be appended to myhostname to form a complete host name.
2921 The dot comes with mydomain, and need not be supplied by the program.
2923 myhostname (myhostname.U):
2924 This variable contains the eventual value of the MYHOSTNAME symbol,
2925 which is the name of the host the program is going to run on.
2926 The domain is not kept with hostname, but must be gotten from mydomain.
2927 The dot comes with mydomain, and need not be supplied by the program.
2929 myuname (Oldconfig.U):
2930 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2931 pseudo variables assignments in the output are stripped, thank you. The
2932 whole thing is then lower-cased.
2935 This variable contains the '-n' flag if that is what causes the echo
2936 command to suppress newline. Otherwise it is null. Correct usage is
2937 $echo $n "prompt for a question: $c".
2939 need_va_copy (need_va_copy.U):
2940 This symbol, if defined, indicates that the system stores
2941 the variable argument list datatype, va_list, in a format
2942 that cannot be copied by simple assignment, so that some
2943 other means must be used when copying is required.
2944 As such systems vary in their provision (or non-provision)
2945 of copying mechanisms, handy.h defines a platform-
2946 independent macro, Perl_va_copy(src, dst), to do the job.
2948 netdb_hlen_type (netdbtype.U):
2949 This variable holds the type used for the 2nd argument to
2950 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2951 This is only useful if you have gethostbyaddr(), naturally.
2953 netdb_host_type (netdbtype.U):
2954 This variable holds the type used for the 1st argument to
2955 gethostbyaddr(). Usually, this is char * or void *, possibly
2956 with or without a const prefix.
2957 This is only useful if you have gethostbyaddr(), naturally.
2959 netdb_name_type (netdbtype.U):
2960 This variable holds the type used for the argument to
2961 gethostbyname(). Usually, this is char * or const char *.
2962 This is only useful if you have gethostbyname(), naturally.
2964 netdb_net_type (netdbtype.U):
2965 This variable holds the type used for the 1st argument to
2966 getnetbyaddr(). Usually, this is int or long.
2967 This is only useful if you have getnetbyaddr(), naturally.
2970 This variable is used internally by Configure to determine the
2971 full pathname (if any) of the nm program. After Configure runs,
2972 the value is reset to a plain "nm" and is not useful.
2975 This variable holds the options that may be necessary for nm.
2977 nm_so_opt (usenm.U):
2978 This variable holds the options that may be necessary for nm
2979 to work on a shared library but that can not be used on an
2980 archive library. Currently, this is only used by Linux, where
2981 nm --dynamic is *required* to get symbols from an ELF library which
2982 has been stripped, but nm --dynamic is *fatal* on an archive library.
2983 Maybe Linux should just always set usenm=false.
2985 nonxs_ext (Extensions.U):
2986 This variable holds a list of all non-xs extensions included
2987 in the package. All of them will be built.
2990 This variable is used internally by Configure to determine the
2991 full pathname (if any) of the nroff program. After Configure runs,
2992 the value is reset to a plain "nroff" and is not useful.
2994 nveformat (perlxvf.U):
2995 This variable contains the format string used for printing
2996 a Perl NV using %e-ish floating point format.
2998 nvEUformat (perlxvf.U):
2999 This variable contains the format string used for printing
3000 a Perl NV using %E-ish floating point format.
3002 nvfformat (perlxvf.U):
3003 This variable confains the format string used for printing
3004 a Perl NV using %f-ish floating point format.
3006 nvFUformat (perlxvf.U):
3007 This variable confains the format string used for printing
3008 a Perl NV using %F-ish floating point format.
3010 nvgformat (perlxvf.U):
3011 This variable contains the format string used for printing
3012 a Perl NV using %g-ish floating point format.
3014 nvGUformat (perlxvf.U):
3015 This variable contains the format string used for printing
3016 a Perl NV using %G-ish floating point format.
3019 This variable is the size of an NV in bytes.
3022 This variable contains the C type used for Perl's NV.
3024 o_nonblock (nblock_io.U):
3025 This variable bears the symbol value to be used during open() or fcntl()
3026 to turn on non-blocking I/O for a file descriptor. If you wish to switch
3027 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
3028 but that is only supported by some devices.
3031 This is an old synonym for _o.
3033 old_pthread_create_joinable (d_pthrattrj.U):
3034 This variable defines the constant to use for creating joinable
3035 (aka undetached) pthreads. Unused if pthread.h defines
3036 PTHREAD_CREATE_JOINABLE. If used, possible values are
3037 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
3039 optimize (ccflags.U):
3040 This variable contains any optimizer/debugger flag that should be used.
3041 It is up to the Makefile to use it.
3043 orderlib (orderlib.U):
3044 This variable is "true" if the components of libraries must be ordered
3045 (with `lorder $* | tsort`) before placing them in an archive. Set to
3046 "false" if ranlib or ar can generate random libraries.
3048 osname (Oldconfig.U):
3049 This variable contains the operating system name (e.g. sunos,
3050 solaris, hpux, etc.). It can be useful later on for setting
3051 defaults. Any spaces are replaced with underscores. It is set
3052 to a null string if we can't figure it out.
3054 osvers (Oldconfig.U):
3055 This variable contains the operating system version (e.g.
3056 4.1.3, 5.2, etc.). It is primarily used for helping select
3057 an appropriate hints file, but might be useful elsewhere for
3058 setting defaults. It is set to '' if we can't figure it out.
3059 We try to be flexible about how much of the version number
3060 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3061 same for this package, hints files might just be os_4.0 or
3062 os_4.1, etc., not keeping separate files for each little release.
3064 otherlibdirs (otherlibdirs.U):
3065 This variable contains a colon-separated set of paths for the perl
3066 binary to search for additional library files or modules.
3067 These directories will be tacked to the end of @INC.
3068 Perl will automatically search below each path for version-
3069 and architecture-specific directories. See inc_version_list
3071 A value of ' ' means 'none' and is used to preserve this value
3072 for the next run through Configure.
3074 package (package.U):
3075 This variable contains the name of the package being constructed.
3076 It is primarily intended for the use of later Configure units.
3079 This variable contains the name of the preferred pager on the system.
3080 Usual values are (the full pathnames of) more, less, pg, or cat.
3083 This variable contains a command that produces the text of the
3084 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3085 "ypcat passwd" when NIS is used.
3086 On some systems, such as os390, there may be no equivalent
3087 command, in which case this variable is unset.
3089 patchlevel (patchlevel.U):
3090 The patchlevel level of this package.
3091 The value of patchlevel comes from the patchlevel.h file.
3092 In a version number such as 5.6.1, this is the "6".
3093 In patchlevel.h, this is referred to as "PERL_VERSION".
3096 This is an old synonym for p_ in Head.U, the character
3097 used to separate elements in the command shell search PATH.
3100 This variable contains the full path (if any) to a previously
3101 installed perl5.005 or later suitable for running the script
3102 to determine inc_version_list.
3105 This variable is defined but not used by Configure.
3106 The value is a plain '' and is not useful.
3108 perl_patchlevel (patchlevel.U):
3109 This is the Perl patch level, a numeric change identifier,
3110 as defined by whichever source code maintenance system
3111 is used to maintain the patches; currently Perforce.
3112 It does not correlate with the Perl version numbers or
3113 the maintenance versus development dichotomy except
3114 by also being increasing.
3116 PERL_REVISION (Oldsyms.U):
3117 In a Perl version number such as 5.6.2, this is the 5.
3118 This value is manually set in patchlevel.h
3120 PERL_SUBVERSION (Oldsyms.U):
3121 In a Perl version number such as 5.6.2, this is the 2.
3122 Values greater than 50 represent potentially unstable
3123 development subversions.
3124 This value is manually set in patchlevel.h
3126 PERL_VERSION (Oldsyms.U):
3127 In a Perl version number such as 5.6.2, this is the 6.
3128 This value is manually set in patchlevel.h
3130 perladmin (perladmin.U):
3131 Electronic mail address of the perl5 administrator.
3134 The list of libraries needed by Perl only (any libraries needed
3135 by extensions only will by dropped, if using dynamic loading).
3137 perlpath (perlpath.U):
3138 This variable contains the eventual value of the PERLPATH symbol,
3139 which contains the name of the perl interpreter to be used in
3140 shell scripts and in the "eval 'exec'" idiom.
3143 This variable is used internally by Configure to determine the
3144 full pathname (if any) of the pg program. After Configure runs,
3145 the value is reset to a plain "pg" and is not useful.
3147 phostname (myhostname.U):
3148 This variable contains the eventual value of the PHOSTNAME symbol,
3149 which is a command that can be fed to popen() to get the host name.
3150 The program should probably not presume that the domain is or isn't
3153 pidtype (pidtype.U):
3154 This variable defines PIDTYPE to be something like pid_t, int,
3155 ushort, or whatever type is used to declare process ids in the kernel.
3158 Holds the private path used by Configure to find out the libraries.
3159 Its value is prepend to libpth. This variable takes care of special
3160 machines, like the mips. Usually, it should be empty.
3162 pm_apiversion (xs_apiversion.U):
3163 This variable contains the version of the oldest perl
3164 compatible with the present perl. (That is, pure perl modules
3165 written for $pm_apiversion will still work for the current
3166 version). perl.c:incpush() and lib/lib.pm will automatically
3167 search in $sitelib for older directories across major versions
3168 back to pm_apiversion. This is only useful if you have a perl
3169 library directory tree structured like the default one. The
3170 versioned site_perl library was introduced in 5.005, so that's
3171 the default setting for this variable. It's hard to imagine
3172 it changing before Perl6. It is included here for symmetry
3173 with xs_apiveprsion -- the searching algorithms will
3174 (presumably) be similar.
3175 See the INSTALL file for how this works.
3178 This variable is defined but not used by Configure.
3179 The value is a plain '' and is not useful.
3182 This variable is defined but not used by Configure.
3183 The value is a plain '' and is not useful.
3186 This variable holds the name of the directory below which the
3187 user will install the package. Usually, this is /usr/local, and
3188 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3189 man pages in /usr/local/man, etc. It is only used to set defaults
3190 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3192 prefixexp (prefix.U):
3193 This variable holds the full absolute path of the directory below
3194 which the user will install the package. Derived from prefix.
3196 privlib (privlib.U):
3197 This variable contains the eventual value of the PRIVLIB symbol,
3198 which is the name of the private library for this package. It may
3199 have a ~ on the front. It is up to the makefile to eventually create
3200 this directory while performing installation (with ~ substitution).
3202 privlibexp (privlib.U):
3203 This variable is the ~name expanded version of privlib, so that you
3204 may use it directly in Makefiles or shell scripts.
3206 prototype (prototype.U):
3207 This variable holds the eventual value of CAN_PROTOTYPE, which
3208 indicates the C compiler can handle funciton prototypes.
3210 ptrsize (ptrsize.U):
3211 This variable contains the value of the PTRSIZE symbol, which
3212 indicates to the C program how many bytes there are in a pointer.
3214 quadkind (quadtype.U):
3215 This variable, if defined, encodes the type of a quad:
3216 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3218 quadtype (quadtype.U):
3219 This variable defines Quad_t to be something like long, int,
3220 long long, int64_t, or whatever type is used for 64-bit integers.
3222 randbits (randfunc.U):
3223 Indicates how many bits are produced by the function used to
3224 generate normalized random numbers.
3226 randfunc (randfunc.U):
3227 Indicates the name of the random number function to use.
3228 Values include drand48, random, and rand. In C programs,
3229 the 'Drand01' macro is defined to generate uniformly distributed
3230 random numbers over the range [0., 1.[ (see drand01 and nrand).
3232 randseedtype (randfunc.U):
3233 Indicates the type of the argument of the seedfunc.
3235 ranlib (orderlib.U):
3236 This variable is set to the pathname of the ranlib program, if it is
3237 needed to generate random libraries. Set to ":" if ar can generate
3238 random libraries or if random libraries are not supported
3240 rd_nodata (nblock_io.U):
3241 This variable holds the return code from read() when no data is
3242 present. It should be -1, but some systems return 0 when O_NDELAY is
3243 used, which is a shame because you cannot make the difference between
3244 no data and an EOF.. Sigh!
3246 revision (patchlevel.U):
3247 The value of revision comes from the patchlevel.h file.
3248 In a version number such as 5.6.1, this is the "5".
3249 In patchlevel.h, this is referred to as "PERL_REVISION".
3252 This variable is used internally by Configure to determine the
3253 full pathname (if any) of the rm program. After Configure runs,
3254 the value is reset to a plain "rm" and is not useful.
3257 This variable is defined but not used by Configure.
3258 The value is a plain '' and is not useful.
3261 This variable contains the command used by Configure
3262 to copy and execute a cross-compiled executable in the
3263 target host. Useful and available only during Perl build.
3264 Empty string '' if not cross-compiling.
3267 This variable contains 'true' or 'false' depending whether the
3268 nm extraction should be performed or not, according to the value
3269 of usenm and the flags on the Configure command line.
3271 sched_yield (d_pthread_y.U):
3272 This variable defines the way to yield the execution
3273 of the current thread.
3275 scriptdir (scriptdir.U):
3276 This variable holds the name of the directory in which the user wants
3277 to put publicly scripts for the package in question. It is either
3278 the same directory as for binaries, or a special one that can be
3279 mounted across different architectures, like /usr/share. Programs
3280 must be prepared to deal with ~name expansion.
3282 scriptdirexp (scriptdir.U):
3283 This variable is the same as scriptdir, but is filename expanded
3284 at configuration time, for programs not wanting to bother with it.
3287 This variable is used internally by Configure to determine the
3288 full pathname (if any) of the sed program. After Configure runs,
3289 the value is reset to a plain "sed" and is not useful.
3291 seedfunc (randfunc.U):
3292 Indicates the random number generating seed function.
3293 Values include srand48, srandom, and srand.
3295 selectminbits (selectminbits.U):
3296 This variable holds the minimum number of bits operated by select.
3297 That is, if you do select(n, ...), how many bits at least will be
3298 cleared in the masks if some activity is detected. Usually this
3299 is either n or 32*ceil(n/32), especially many little-endians do
3300 the latter. This is only useful if you have select(), naturally.
3302 selecttype (selecttype.U):
3303 This variable holds the type used for the 2nd, 3rd, and 4th
3304 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3305 is defined, and 'int *' otherwise. This is only useful if you
3306 have select(), naturally.
3309 This variable is defined but not used by Configure.
3310 The value is a plain '' and is not useful.
3313 This variable contains the full pathname of the shell used
3314 on this system to execute Bourne shell scripts. Usually, this will be
3315 /bin/sh, though it's possible that some systems will have /bin/ksh,
3316 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3318 This unit comes before Options.U, so you can't set sh with a '-D'
3319 option, though you can override this (and startsh)
3320 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3323 This variable is defined but not used by Configure.
3324 The value is a plain '' and is not useful.
3326 sharpbang (spitshell.U):
3327 This variable contains the string #! if this system supports that
3330 shmattype (d_shmat.U):
3331 This symbol contains the type of pointer returned by shmat().
3332 It can be 'void *' or 'char *'.
3334 shortsize (intsize.U):
3335 This variable contains the value of the SHORTSIZE symbol which
3336 indicates to the C program how many bytes there are in a short.
3338 shrpenv (libperl.U):
3339 If the user builds a shared libperl.so, then we need to tell the
3340 'perl' executable where it will be able to find the installed libperl.so.
3341 One way to do this on some systems is to set the environment variable
3342 LD_RUN_PATH to the directory that will be the final location of the
3343 shared libperl.so. The makefile can use this with something like
3344 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3346 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3349 See the main perl Makefile.SH for actual working usage.
3350 Alternatively, we might be able to use a command line option such
3351 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3352 $archlibexp/CORE (Linux).
3354 shsharp (spitshell.U):
3355 This variable tells further Configure units whether your sh can
3358 sig_count (sig_name.U):
3359 This variable holds a number larger than the largest valid
3360 signal number. This is usually the same as the NSIG macro.
3362 sig_name (sig_name.U):
3363 This variable holds the signal names, space separated. The leading
3364 SIG in signal name is removed. A ZERO is prepended to the
3365 list. This is currently not used.
3367 sig_name_init (sig_name.U):
3368 This variable holds the signal names, enclosed in double quotes and
3369 separated by commas, suitable for use in the SIG_NAME definition
3370 below. A "ZERO" is prepended to the list, and the list is
3371 terminated with a plain 0. The leading SIG in signal names
3372 is removed. See sig_num.
3374 sig_num (sig_name.U):
3375 This variable holds the signal numbers, space separated. A ZERO is
3376 prepended to the list (corresponding to the fake SIGZERO), and
3377 the list is terminated with a 0. Those numbers correspond to
3378 the value of the signal listed in the same place within the
3381 sig_num_init (sig_name.U):
3382 This variable holds the signal numbers, enclosed in double quotes and
3383 separated by commas, suitable for use in the SIG_NUM definition
3384 below. A "ZERO" is prepended to the list, and the list is
3385 terminated with a plain 0.
3387 sig_size (sig_name.U):
3388 This variable contains the number of elements of the sig_name
3389 and sig_num arrays, excluding the final NULL entry.
3391 signal_t (d_voidsig.U):
3392 This variable holds the type of the signal handler (void or int).
3394 sitearch (sitearch.U):
3395 This variable contains the eventual value of the SITEARCH symbol,
3396 which is the name of the private library for this package. It may
3397 have a ~ on the front. It is up to the makefile to eventually create
3398 this directory while performing installation (with ~ substitution).
3399 The standard distribution will put nothing in this directory.
3400 After perl has been installed, users may install their own local
3401 architecture-dependent modules in this directory with
3402 MakeMaker Makefile.PL
3403 or equivalent. See INSTALL for details.
3405 sitearchexp (sitearch.U):
3406 This variable is the ~name expanded version of sitearch, so that you
3407 may use it directly in Makefiles or shell scripts.
3409 sitebin (sitebin.U):
3410 This variable holds the name of the directory in which the user wants
3411 to put add-on publicly executable files for the package in question. It
3412 is most often a local directory such as /usr/local/bin. Programs using
3413 this variable must be prepared to deal with ~name substitution.
3414 The standard distribution will put nothing in this directory.
3415 After perl has been installed, users may install their own local
3416 executables in this directory with
3417 MakeMaker Makefile.PL
3418 or equivalent. See INSTALL for details.
3420 sitebinexp (sitebin.U):
3421 This is the same as the sitebin variable, but is filename expanded at
3422 configuration time, for use in your makefiles.
3424 sitelib (sitelib.U):
3425 This variable contains the eventual value of the SITELIB symbol,
3426 which is the name of the private library for this package. It may
3427 have a ~ on the front. It is up to the makefile to eventually create
3428 this directory while performing installation (with ~ substitution).
3429 The standard distribution will put nothing in this directory.
3430 After perl has been installed, users may install their own local
3431 architecture-independent modules in this directory with
3432 MakeMaker Makefile.PL
3433 or equivalent. See INSTALL for details.
3435 sitelib_stem (sitelib.U):
3436 This variable is $sitelibexp with any trailing version-specific component
3437 removed. The elements in inc_version_list (inc_version_list.U) can
3438 be tacked onto this variable to generate a list of directories to search.
3440 sitelibexp (sitelib.U):
3441 This variable is the ~name expanded version of sitelib, so that you
3442 may use it directly in Makefiles or shell scripts.
3444 siteprefix (siteprefix.U):
3445 This variable holds the full absolute path of the directory below
3446 which the user will install add-on packages.
3447 See INSTALL for usage and examples.
3449 siteprefixexp (siteprefix.U):
3450 This variable holds the full absolute path of the directory below
3451 which the user will install add-on packages. Derived from siteprefix.
3453 sizesize (sizesize.U):
3454 This variable contains the size of a sizetype in bytes.
3456 sizetype (sizetype.U):
3457 This variable defines sizetype to be something like size_t,
3458 unsigned long, or whatever type is used to declare length
3459 parameters for string functions.
3462 This variable is defined but not used by Configure.
3463 The value is a plain '' and is not useful.
3466 This variable is defined but not used by Configure.
3467 The value is a plain '' and is not useful.
3470 This variable holds the extension used to identify shared libraries
3471 (also known as shared objects) on the system. Usually set to 'so'.
3473 sockethdr (d_socket.U):
3474 This variable has any cpp '-I' flags needed for socket support.
3476 socketlib (d_socket.U):
3477 This variable has the names of any libraries needed for socket support.
3479 socksizetype (socksizetype.U):
3480 This variable holds the type used for the size argument
3481 for various socket calls like accept. Usual values include
3482 socklen_t, size_t, and int.
3485 This variable is used internally by Configure to determine the
3486 full pathname (if any) of the sort program. After Configure runs,
3487 the value is reset to a plain "sort" and is not useful.
3489 spackage (package.U):
3490 This variable contains the name of the package being constructed,
3491 with the first letter uppercased, i.e. suitable for starting
3494 spitshell (spitshell.U):
3495 This variable contains the command necessary to spit out a runnable
3496 shell on this system. It is either cat or a grep '-v' for # comments.
3498 sPRId64 (quadfio.U):
3499 This variable, if defined, contains the string used by stdio to
3500 format 64-bit decimal numbers (format 'd') for output.
3502 sPRIeldbl (longdblfio.U):
3503 This variable, if defined, contains the string used by stdio to
3504 format long doubles (format 'e') for output.
3506 sPRIEUldbl (longdblfio.U):
3507 This variable, if defined, contains the string used by stdio to
3508 format long doubles (format 'E') for output.
3509 The 'U' in the name is to separate this from sPRIeldbl so that even
3510 case-blind systems can see the difference.
3512 sPRIfldbl (longdblfio.U):
3513 This variable, if defined, contains the string used by stdio to
3514 format long doubles (format 'f') for output.
3516 sPRIFUldbl (longdblfio.U):
3517 This variable, if defined, contains the string used by stdio to
3518 format long doubles (format 'F') for output.
3519 The 'U' in the name is to separate this from sPRIfldbl so that even
3520 case-blind systems can see the difference.
3522 sPRIgldbl (longdblfio.U):
3523 This variable, if defined, contains the string used by stdio to
3524 format long doubles (format 'g') for output.
3526 sPRIGUldbl (longdblfio.U):
3527 This variable, if defined, contains the string used by stdio to
3528 format long doubles (format 'G') for output.
3529 The 'U' in the name is to separate this from sPRIgldbl so that even
3530 case-blind systems can see the difference.
3532 sPRIi64 (quadfio.U):
3533 This variable, if defined, contains the string used by stdio to
3534 format 64-bit decimal numbers (format 'i') for output.
3536 sPRIo64 (quadfio.U):
3537 This variable, if defined, contains the string used by stdio to
3538 format 64-bit octal numbers (format 'o') for output.
3540 sPRIu64 (quadfio.U):
3541 This variable, if defined, contains the string used by stdio to
3542 format 64-bit unsigned decimal numbers (format 'u') for output.
3544 sPRIx64 (quadfio.U):
3545 This variable, if defined, contains the string used by stdio to
3546 format 64-bit hexadecimal numbers (format 'x') for output.
3548 sPRIXU64 (quadfio.U):
3549 This variable, if defined, contains the string used by stdio to
3550 format 64-bit hExADECimAl numbers (format 'X') for output.
3551 The 'U' in the name is to separate this from sPRIx64 so that even
3552 case-blind systems can see the difference.
3555 This variable holds the path to the package source. It is up to
3556 the Makefile to use this variable and set VPATH accordingly to
3557 find the sources remotely.
3559 sSCNfldbl (longdblfio.U):
3560 This variable, if defined, contains the string used by stdio to
3561 format long doubles (format 'f') for input.
3563 ssizetype (ssizetype.U):
3564 This variable defines ssizetype to be something like ssize_t,
3565 long or int. It is used by functions that return a count
3566 of bytes or an error condition. It must be a signed type.
3567 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3569 startperl (startperl.U):
3570 This variable contains the string to put on the front of a perl
3571 script to make sure (hopefully) that it runs with perl and not some
3572 shell. Of course, that leading line must be followed by the classical
3574 eval 'exec perl -S $0 ${1+"$@"}'
3575 if $running_under_some_shell;
3576 to guarantee perl startup should the shell execute the script. Note
3577 that this magic incatation is not understood by csh.
3579 startsh (startsh.U):
3580 This variable contains the string to put on the front of a shell
3581 script to make sure (hopefully) that it runs with sh and not some
3584 static_ext (Extensions.U):
3585 This variable holds a list of XS extension files we want to
3586 link statically into the package. It is used by Makefile.
3588 stdchar (stdchar.U):
3589 This variable conditionally defines STDCHAR to be the type of char
3590 used in stdio.h. It has the values "unsigned char" or "char".
3592 stdio_base (d_stdstdio.U):
3593 This variable defines how, given a FILE pointer, fp, to access the
3594 _base field (or equivalent) of stdio.h's FILE structure. This will
3595 be used to define the macro FILE_base(fp).
3597 stdio_bufsiz (d_stdstdio.U):
3598 This variable defines how, given a FILE pointer, fp, to determine
3599 the number of bytes store in the I/O buffer pointer to by the
3600 _base field (or equivalent) of stdio.h's FILE structure. This will
3601 be used to define the macro FILE_bufsiz(fp).
3603 stdio_cnt (d_stdstdio.U):
3604 This variable defines how, given a FILE pointer, fp, to access the
3605 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3606 be used to define the macro FILE_cnt(fp).
3608 stdio_filbuf (d_stdstdio.U):
3609 This variable defines how, given a FILE pointer, fp, to tell
3610 stdio to refill its internal buffers (?). This will
3611 be used to define the macro FILE_filbuf(fp).
3613 stdio_ptr (d_stdstdio.U):
3614 This variable defines how, given a FILE pointer, fp, to access the
3615 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3616 be used to define the macro FILE_ptr(fp).
3618 stdio_stream_array (stdio_streams.U):
3619 This variable tells the name of the array holding the stdio streams.
3620 Usual values include _iob, __iob, and __sF.
3622 strings (i_string.U):
3623 This variable holds the full path of the string header that will be
3624 used. Typically /usr/include/string.h or /usr/include/strings.h.
3627 This variable is defined but not used by Configure.
3628 The value is a plain '' and is not useful.
3630 subversion (patchlevel.U):
3631 The subversion level of this package.
3632 The value of subversion comes from the patchlevel.h file.
3633 In a version number such as 5.6.1, this is the "1".
3634 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3635 This is unique to perl.
3638 This variable holds the place where the manual is located on this
3639 system. It is not the place where the user wants to put his manual
3640 pages. Rather it is the place where Configure may look to find manual
3641 for unix commands (section 1 of the manual usually). See mansrc.
3644 This variable is defined but not used by Configure.
3645 The value is a plain '' and is not useful.
3648 This variable is defined but not used by Configure.
3649 The value is a plain '' and is not useful.
3651 targetarch (Cross.U):
3652 If cross-compiling, this variable contains the target architecture.
3653 If not, this will be empty.
3656 This variable is defined but not used by Configure.
3657 The value is a plain '' and is not useful.
3660 This variable is defined but not used by Configure.
3661 The value is a plain '' and is not useful.
3664 This variable is used internally by Configure to determine the
3665 full pathname (if any) of the test program. After Configure runs,
3666 the value is reset to a plain "test" and is not useful.
3668 timeincl (i_time.U):
3669 This variable holds the full path of the included time header(s).
3671 timetype (d_time.U):
3672 This variable holds the type returned by time(). It can be long,
3673 or time_t on BSD sites (in which case <sys/types.h> should be
3674 included). Anyway, the type Time_t should be used.
3677 This variable contains the command used by Configure
3678 to copy to from the target host. Useful and available
3679 only during Perl build.
3680 The string ':' if not cross-compiling.
3683 This variable is used internally by Configure to determine the
3684 full pathname (if any) of the touch program. After Configure runs,
3685 the value is reset to a plain "touch" and is not useful.
3688 This variable is used internally by Configure to determine the
3689 full pathname (if any) of the tr program. After Configure runs,
3690 the value is reset to a plain "tr" and is not useful.
3693 This variable contains the value to be passed to the tr(1)
3694 command to transliterate a newline. Typical values are
3695 '\012' and '\n'. This is needed for EBCDIC systems where
3696 newline is not necessarily '\012'.
3699 This variable is defined but not used by Configure.
3700 The value is a plain '' and is not useful.
3703 This variable is the size of an U16 in bytes.
3706 This variable contains the C type used for Perl's U16.
3709 This variable is the size of an U32 in bytes.
3712 This variable contains the C type used for Perl's U32.
3715 This variable is the size of an U64 in bytes.
3718 This variable contains the C type used for Perl's U64.
3721 This variable is the size of an U8 in bytes.
3724 This variable contains the C type used for Perl's U8.
3727 This variable contains the format string used for printing a Uid_t.
3729 uidsign (uidsign.U):
3730 This variable contains the signedness of a uidtype.
3731 1 for unsigned, -1 for signed.
3733 uidsize (uidsize.U):
3734 This variable contains the size of a uidtype in bytes.
3736 uidtype (uidtype.U):
3737 This variable defines Uid_t to be something like uid_t, int,
3738 ushort, or whatever type is used to declare user ids in the kernel.
3741 This variable is used internally by Configure to determine the
3742 full pathname (if any) of the uname program. After Configure runs,
3743 the value is reset to a plain "uname" and is not useful.
3746 This variable is used internally by Configure to determine the
3747 full pathname (if any) of the uniq program. After Configure runs,
3748 the value is reset to a plain "uniq" and is not useful.
3750 uquadtype (quadtype.U):
3751 This variable defines Uquad_t to be something like unsigned long,
3752 unsigned int, unsigned long long, uint64_t, or whatever type is
3753 used for 64-bit integers.
3755 use5005threads (usethreads.U):
3756 This variable conditionally defines the USE_5005THREADS symbol,
3757 and indicates that Perl should be built to use the 5.005-based
3758 threading implementation.
3760 use64bitall (use64bits.U):
3761 This variable conditionally defines the USE_64_BIT_ALL symbol,
3762 and indicates that 64-bit integer types should be used
3763 when available. The maximal possible
3764 64-bitness is employed: LP64 or ILP64, meaning that you will
3765 be able to use more than 2 gigabytes of memory. This mode is
3766 even more binary incompatible than USE_64_BIT_INT. You may not
3767 be able to run the resulting executable in a 32-bit CPU at all or
3768 you may need at least to reboot your OS to 64-bit mode.
3770 use64bitint (use64bits.U):
3771 This variable conditionally defines the USE_64_BIT_INT symbol,
3772 and indicates that 64-bit integer types should be used
3773 when available. The minimal possible 64-bitness
3774 is employed, just enough to get 64-bit integers into Perl.
3775 This may mean using for example "long longs", while your memory
3776 may still be limited to 2 gigabytes.
3778 usecrosscompile (Cross.U):
3779 This variable conditionally defines the USE_CROSS_COMPILE symbol,
3780 and indicates that Perl has been cross-compiled.
3783 This variable indicates if the system supports dynamic
3784 loading of some sort. See also dlsrc and dlobj.
3786 useithreads (usethreads.U):
3787 This variable conditionally defines the USE_ITHREADS symbol,
3788 and indicates that Perl should be built to use the interpreter-based
3789 threading implementation.
3791 uselargefiles (uselfs.U):
3792 This variable conditionally defines the USE_LARGE_FILES symbol,
3793 and indicates that large file interfaces should be used when
3796 uselongdouble (uselongdbl.U):
3797 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3798 and indicates that long doubles should be used when available.
3800 usemorebits (usemorebits.U):
3801 This variable conditionally defines the USE_MORE_BITS symbol,
3802 and indicates that explicit 64-bit interfaces and long doubles
3803 should be used when available.
3805 usemultiplicity (usemultiplicity.U):
3806 This variable conditionally defines the MULTIPLICITY symbol,
3807 and indicates that Perl should be built to use multiplicity.
3809 usemymalloc (mallocsrc.U):
3810 This variable contains y if the malloc that comes with this package
3811 is desired over the system's version of malloc. People often include
3812 special versions of malloc for effiency, but such versions are often
3813 less portable. See also mallocsrc and mallocobj.
3814 If this is 'y', then -lmalloc is removed from $libs.
3817 This variable contains 'true' or 'false' depending whether the
3818 nm extraction is wanted or not.
3820 useopcode (Extensions.U):
3821 This variable holds either 'true' or 'false' to indicate
3822 whether the Opcode extension should be used. The sole
3823 use for this currently is to allow an easy mechanism
3824 for users to skip the Opcode extension from the Configure
3827 useperlio (useperlio.U):
3828 This variable conditionally defines the USE_PERLIO symbol,
3829 and indicates that the PerlIO abstraction should be
3832 useposix (Extensions.U):
3833 This variable holds either 'true' or 'false' to indicate
3834 whether the POSIX extension should be used. The sole
3835 use for this currently is to allow an easy mechanism
3836 for hints files to indicate that POSIX will not compile
3837 on a particular system.
3839 usereentrant (usethreads.U):
3840 This variable conditionally defines the USE_REENTRANT_API symbol,
3841 which indicates that the thread code may try to use the various
3842 _r versions of library functions. This is only potentially
3843 meaningful if usethreads is set and is very experimental, it is
3844 not even prompted for.
3847 This variable is set to true when the user agrees to use sfio.
3848 It is set to false when sfio is not available or when the user
3849 explicitely requests not to use sfio. It is here primarily so
3850 that command-line settings can override the auto-detection of
3851 d_sfio without running into a "WHOA THERE".
3853 useshrplib (libperl.U):
3854 This variable is set to 'yes' if the user wishes
3855 to build a shared libperl, and 'no' otherwise.
3857 usesocks (usesocks.U):
3858 This variable conditionally defines the USE_SOCKS symbol,
3859 and indicates that Perl should be built to use SOCKS.
3861 usethreads (usethreads.U):
3862 This variable conditionally defines the USE_THREADS symbol,
3863 and indicates that Perl should be built to use threads.
3865 usevendorprefix (vendorprefix.U):
3866 This variable tells whether the vendorprefix
3867 and consequently other vendor* paths are in use.
3869 usevfork (d_vfork.U):
3870 This variable is set to true when the user accepts to use vfork.
3871 It is set to false when no vfork is available or when the user
3872 explicitely requests not to use vfork.
3875 This variable holds the path of the include files, which is
3876 usually /usr/include. It is mainly used by other Configure units.
3879 This variable is defined but not used by Configure.
3880 The value is a plain '' and is not useful.
3882 uvoformat (perlxvf.U):
3883 This variable contains the format string used for printing
3884 a Perl UV as an unsigned octal integer.
3887 This variable is the size of a UV in bytes.
3890 This variable contains the C type used for Perl's UV.
3892 uvuformat (perlxvf.U):
3893 This variable contains the format string used for printing
3894 a Perl UV as an unsigned decimal integer.
3896 uvxformat (perlxvf.U):
3897 This variable contains the format string used for printing
3898 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3900 uvXUformat (perlxvf.U):
3901 This variable contains the format string used for printing
3902 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3904 vendorarch (vendorarch.U):
3905 This variable contains the value of the PERL_VENDORARCH symbol.
3906 It may have a ~ on the front.
3907 The standard distribution will put nothing in this directory.
3908 Vendors who distribute perl may wish to place their own
3909 architecture-dependent modules and extensions in this directory with
3910 MakeMaker Makefile.PL INSTALLDIRS=vendor
3911 or equivalent. See INSTALL for details.
3913 vendorarchexp (vendorarch.U):
3914 This variable is the ~name expanded version of vendorarch, so that you
3915 may use it directly in Makefiles or shell scripts.
3917 vendorbin (vendorbin.U):
3918 This variable contains the eventual value of the VENDORBIN symbol.
3919 It may have a ~ on the front.
3920 The standard distribution will put nothing in this directory.
3921 Vendors who distribute perl may wish to place additional
3922 binaries in this directory with
3923 MakeMaker Makefile.PL INSTALLDIRS=vendor
3924 or equivalent. See INSTALL for details.
3926 vendorbinexp (vendorbin.U):
3927 This variable is the ~name expanded version of vendorbin, so that you
3928 may use it directly in Makefiles or shell scripts.
3930 vendorlib (vendorlib.U):
3931 This variable contains the eventual value of the VENDORLIB symbol,
3932 which is the name of the private library for this package.
3933 The standard distribution will put nothing in this directory.
3934 Vendors who distribute perl may wish to place their own
3935 modules in this directory with
3936 MakeMaker Makefile.PL INSTALLDIRS=vendor
3937 or equivalent. See INSTALL for details.
3939 vendorlib_stem (vendorlib.U):
3940 This variable is $vendorlibexp with any trailing version-specific component
3941 removed. The elements in inc_version_list (inc_version_list.U) can
3942 be tacked onto this variable to generate a list of directories to search.
3944 vendorlibexp (vendorlib.U):
3945 This variable is the ~name expanded version of vendorlib, so that you
3946 may use it directly in Makefiles or shell scripts.
3948 vendorprefix (vendorprefix.U):
3949 This variable holds the full absolute path of the directory below
3950 which the vendor will install add-on packages.
3951 See INSTALL for usage and examples.
3953 vendorprefixexp (vendorprefix.U):
3954 This variable holds the full absolute path of the directory below
3955 which the vendor will install add-on packages. Derived from vendorprefix.
3957 version (patchlevel.U):
3958 The full version number of this package, such as 5.6.1 (or 5_6_1).
3959 This combines revision, patchlevel, and subversion to get the
3960 full version number, including any possible subversions.
3961 This is suitable for use as a directory name, and hence is
3962 filesystem dependent.
3964 version_patchlevel_string (patchlevel.U):
3965 This is a string combining version, subversion and
3966 perl_patchlevel (if perl_patchlevel is non-zero).
3967 It is typically something like
3968 'version 7 subversion 1' or
3969 'version 7 subversion 1 patchlevel 11224'
3970 It is computed here to avoid duplication of code in myconfig.SH
3973 versiononly (versiononly.U):
3974 If set, this symbol indicates that only the version-specific
3975 components of a perl installation should be installed.
3976 This may be useful for making a test installation of a new
3977 version without disturbing the existing installation.
3978 Setting versiononly is equivalent to setting installperl's -v option.
3979 In particular, the non-versioned scripts and programs such as
3980 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3981 (see INSTALL for a more complete list). Nor are the man
3983 Usually, this is undef.
3986 This variable is defined but not used by Configure.
3987 The value is a plain '' and is not useful.
3989 voidflags (voidflags.U):
3990 This variable contains the eventual value of the VOIDFLAGS symbol,
3991 which indicates how much support of the void type is given by this
3992 compiler. See VOIDFLAGS for more info.
3995 This variable holds extra path (space-separated) used to find
3996 libraries on this platform, for example CPU-specific libraries
3997 (on multi-CPU platforms) may be listed here.
3999 xs_apiversion (xs_apiversion.U):
4000 This variable contains the version of the oldest perl binary
4001 compatible with the present perl. perl.c:incpush() and
4002 lib/lib.pm will automatically search in $sitearch for older
4003 directories across major versions back to xs_apiversion.
4004 This is only useful if you have a perl library directory tree
4005 structured like the default one.
4006 See INSTALL for how this works.
4007 The versioned site_perl directory was introduced in 5.005,
4008 so that is the lowest possible value.
4009 Since this can depend on compile time options (such as
4010 bincompat) it is set by Configure. Other non-default sources
4011 of potential incompatibility, such as multiplicity, threads,
4012 debugging, 64bits, sfio, etc., are not checked for currently,
4013 though in principle we could go snooping around in old
4017 This variable holds the name of the compiler compiler we
4018 want to use in the Makefile. It can be yacc, byacc, or bison -y.
4021 This variable contains any additional yacc flags desired by the
4022 user. It is up to the Makefile to use this.
4025 This variable is defined but not used by Configure.
4026 The value is a plain '' and is not useful.
4029 This variable is used internally by Configure to determine the
4030 full pathname (if any) of the zip program. After Configure runs,
4031 the value is reset to a plain "zip" and is not useful.