1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double-- or a long double when applicable. Usual values are
30 2, 4 and 8. The default is eight, for safety.
32 ansi2knr (ansi2knr.U):
33 This variable is set if the user needs to run ansi2knr.
34 Currently, this is not supported, so we just abort.
36 aphostname (d_gethname.U):
37 This variable contains the command which can be used to compute the
38 host name. The command is fully qualified by its absolute path, to make
39 it safe when used by a process with super-user privileges.
41 api_revision (patchlevel.U):
42 The three variables, api_revision, api_version, and
43 api_subversion, specify the version of the oldest perl binary
44 compatible with the present perl. In a full version string
45 such as '5.6.1', api_revision is the '5'.
46 Prior to 5.5.640, the format was a floating point number,
48 perl.c:incpush() and lib/lib.pm will automatically search in
49 $sitelib/.. for older directories back to the limit specified
50 by these api_ variables. This is only useful if you have a
51 perl library directory tree structured like the default one.
52 See INSTALL for how this works. The versioned site_perl
53 directory was introduced in 5.005, so that is the lowest
54 possible value. The version list appropriate for the current
55 system is determined in inc_version_list.U.
56 XXX To do: Since compatibility can depend on compile time
57 options (such as bincompat, longlong, etc.) it should
58 (perhaps) be set by Configure, but currently it isn't.
59 Currently, we read a hard-wired value from patchlevel.h.
60 Perhaps what we ought to do is take the hard-wired value from
61 patchlevel.h but then modify it if the current Configure
62 options warrant. patchlevel.h then would use an #ifdef guard.
64 api_subversion (patchlevel.U):
65 The three variables, api_revision, api_version, and
66 api_subversion, specify the version of the oldest perl binary
67 compatible with the present perl. In a full version string
68 such as '5.6.1', api_subversion is the '1'. See api_revision for
71 api_version (patchlevel.U):
72 The three variables, api_revision, api_version, and
73 api_subversion, specify the version of the oldest perl binary
74 compatible with the present perl. In a full version string
75 such as '5.6.1', api_version is the '6'. See api_revision for
76 full details. As a special case, 5.5.0 is rendered in the
77 old-style as 5.005. (In the 5.005_0x maintenance series,
78 this was the only versioned directory in $sitelib.)
80 api_versionstring (patchlevel.U):
81 This variable combines api_revision, api_version, and
82 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
83 for use as a directory name. This is filesystem dependent.
86 This variable is used internally by Configure to determine the
87 full pathname (if any) of the ar program. After Configure runs,
88 the value is reset to a plain "ar" and is not useful.
91 This variable holds the name of the directory in which the user wants
92 to put architecture-dependent public library files for $package.
93 It is most often a local directory such as /usr/local/lib.
94 Programs using this variable must be prepared to deal
95 with filename expansion.
97 archlibexp (archlib.U):
98 This variable is the same as the archlib variable, but is
99 filename expanded at configuration time, for convenient use.
101 archname64 (use64bits.U):
102 This variable is used for the 64-bitness part of $archname.
104 archname (archname.U):
105 This variable is a short name to characterize the current
106 architecture. It is used mainly to construct the default archlib.
109 This variable defines any additional objects that must be linked
110 in with the program on this architecture. On unix, it is usually
111 empty. It is typically used to include emulations of unix calls
112 or other facilities. For perl on OS/2, for example, this would
116 This variable is used internally by Configure to determine the
117 full pathname (if any) of the awk program. After Configure runs,
118 the value is reset to a plain "awk" and is not useful.
121 The base revision level of this package, from the .package file.
124 This variable is defined but not used by Configure.
125 The value is a plain '' and is not useful.
128 This variable holds the name of the directory in which the user wants
129 to put publicly executable images for the package in question. It
130 is most often a local directory such as /usr/local/bin. Programs using
131 this variable must be prepared to deal with ~name substitution.
133 bincompat5005 (bincompat5005.U):
134 This variable contains y if this version of Perl should be
135 binary-compatible with Perl 5.005.
138 This is the same as the bin variable, but is filename expanded at
139 configuration time, for use in your makefiles.
142 This variable is defined but not used by Configure.
143 The value is a plain '' and is not useful.
146 This variable is used internally by Configure to determine the
147 full pathname (if any) of the byacc program. After Configure runs,
148 the value is reset to a plain "byacc" and is not useful.
150 byteorder (byteorder.U):
151 This variable holds the byte order. In the following, larger digits
152 indicate more significance. The variable byteorder is either 4321
153 on a big-endian machine, or 1234 on a little-endian, or 87654321
154 on a Cray ... or 3412 with weird order !
157 This variable contains the \c string if that is what causes the echo
158 command to suppress newline. Otherwise it is null. Correct usage is
159 $echo $n "prompt for a question: $c".
161 castflags (d_castneg.U):
162 This variable contains a flag that precise difficulties the
163 compiler has casting odd floating values to unsigned long:
165 1 = couldn't cast < 0
166 2 = couldn't cast >= 0x80000000
167 4 = couldn't cast in argument expression list
170 This variable is used internally by Configure to determine the
171 full pathname (if any) of the cat program. After Configure runs,
172 the value is reset to a plain "cat" and is not useful.
175 This variable holds the name of a command to execute a C compiler which
176 can resolve multiple global references that happen to have the same
177 name. Usual values are 'cc' and 'gcc'.
178 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
180 cccdlflags (dlsrc.U):
181 This variable contains any special flags that might need to be
182 passed with 'cc -c' to compile modules to be used to create a shared
183 library that will be used for dynamic loading. For hpux, this
184 should be +z. It is up to the makefile to use it.
187 This variable contains any special flags that might need to be
188 passed to cc to link with a shared library for dynamic loading.
189 It is up to the makefile to use it. For sunos 4.1, it should
193 This variable contains any additional C compiler flags desired by
194 the user. It is up to the Makefile to use this.
196 ccflags_uselargefiles (uselfs.U):
197 This variable contains the compiler flags needed by large file builds
198 and added to ccflags by hints files.
201 This can set either by hints files or by Configure. If using
202 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
203 Some platforms, however, make good use of this by storing the
204 flavor of the C compiler being used here. For example if using
205 the Sun WorkShop suite, ccname will be 'workshop'.
207 ccsymbols (Cppsym.U):
208 The variable contains the symbols defined by the C compiler alone.
209 The symbols defined by cpp or by cc when it calls cpp are not in
210 this list, see cppsymbols and cppccsymbols.
211 The list is a space-separated list of symbol=value tokens.
213 ccversion (Checkcc.U):
214 This can set either by hints files or by Configure. If using
215 a (non-gcc) vendor cc, this variable may contain a version for
219 Login name of the person who ran the Configure script and answered the
220 questions. This is used to tag both config.sh and config_h.SH.
222 cf_email (cf_email.U):
223 Electronic mail address of the person who ran Configure. This can be
224 used by units that require the user's e-mail, like MailList.U.
227 Holds the output of the "date" command when the configuration file was
228 produced. This is used to tag both config.sh and config_h.SH.
230 charsize (charsize.U):
231 This variable contains the value of the CHARSIZE symbol, which
232 indicates to the C program how many bytes there are in a character.
235 This variable is defined but not used by Configure.
236 The value is a plain '' and is not useful.
239 This variable is defined but not used by Configure.
240 The value is a plain '' and is not useful.
243 This variable is defined but not used by Configure.
244 The value is a plain '' and is not useful.
246 clocktype (d_times.U):
247 This variable holds the type returned by times(). It can be long,
248 or clock_t on BSD sites (in which case <sys/types.h> should be
252 This variable is used internally by Configure to determine the
253 full pathname (if any) of the comm program. After Configure runs,
254 the value is reset to a plain "comm" and is not useful.
257 This variable is defined but not used by Configure.
258 The value is a plain '' and is not useful.
260 CONFIGDOTSH (Oldsyms.U):
261 This is set to 'true' in config.sh so that a shell script
262 sourcing config.sh can tell if it has been sourced already.
264 contains (contains.U):
265 This variable holds the command to do a grep with a proper return
266 status. On most sane systems it is simply "grep". On insane systems
267 it is a grep followed by a cat followed by a test. This variable
268 is primarily for the use of other Configure units.
271 This variable is used internally by Configure to determine the
272 full pathname (if any) of the cp program. After Configure runs,
273 the value is reset to a plain "cp" and is not useful.
276 This variable is defined but not used by Configure.
277 The value is a plain '' and is not useful.
280 This variable is used internally by Configure to determine the
281 full pathname (if any) of the cpp program. After Configure runs,
282 the value is reset to a plain "cpp" and is not useful.
284 cpp_stuff (cpp_stuff.U):
285 This variable contains an identification of the catenation mechanism
286 used by the C preprocessor.
288 cppccsymbols (Cppsym.U):
289 The variable contains the symbols defined by the C compiler
290 when it calls cpp. The symbols defined by the cc alone or cpp
291 alone are not in this list, see ccsymbols and cppsymbols.
292 The list is a space-separated list of symbol=value tokens.
294 cppflags (ccflags.U):
295 This variable holds the flags that will be passed to the C pre-
296 processor. It is up to the Makefile to use it.
298 cpplast (cppstdin.U):
299 This variable has the same functionality as cppminus, only it applies
300 to cpprun and not cppstdin.
302 cppminus (cppstdin.U):
303 This variable contains the second part of the string which will invoke
304 the C preprocessor on the standard input and produce to standard
305 output. This variable will have the value "-" if cppstdin needs
306 a minus to specify standard input, otherwise the value is "".
309 This variable contains the command which will invoke a C preprocessor
310 on standard input and put the output to stdout. It is guaranteed not
311 to be a wrapper and may be a null string if no preprocessor can be
312 made directly available. This preprocessor might be different from the
313 one used by the C compiler. Don't forget to append cpplast after the
314 preprocessor options.
316 cppstdin (cppstdin.U):
317 This variable contains the command which will invoke the C
318 preprocessor on standard input and put the output to stdout.
319 It is primarily used by other Configure units that ask about
320 preprocessor symbols.
322 cppsymbols (Cppsym.U):
323 The variable contains the symbols defined by the C preprocessor
324 alone. The symbols defined by cc or by cc when it calls cpp are
325 not in this list, see ccsymbols and cppccsymbols.
326 The list is a space-separated list of symbol=value tokens.
328 crosscompile (crosscompile.U):
329 This variable conditionally defines the CROSSCOMPILE symbol
330 which signifies that the build process is be a cross-compilation.
331 This is normally set by hints files or from Configure command line.
333 cryptlib (d_crypt.U):
334 This variable holds -lcrypt or the path to a libcrypt.a archive if
335 the crypt() function is not defined in the standard C library. It is
336 up to the Makefile to use this.
339 This variable is used internally by Configure to determine the
340 full pathname (if any) of the csh program. After Configure runs,
341 the value is reset to a plain "csh" and is not useful.
343 d__fwalk (d__fwalk.U):
344 This variable conditionally defines HAS__FWALK if _fwalk() is
345 available to apply a function to all the file handles.
347 d_access (d_access.U):
348 This variable conditionally defines HAS_ACCESS if the access() system
349 call is available to check for access permissions using real IDs.
351 d_accessx (d_accessx.U):
352 This variable conditionally defines the HAS_ACCESSX symbol, which
353 indicates to the C program that the accessx() routine is available.
356 This variable conditionally defines the HAS_ALARM symbol, which
357 indicates to the C program that the alarm() routine is available.
359 d_archlib (archlib.U):
360 This variable conditionally defines ARCHLIB to hold the pathname
361 of architecture-dependent library files for $package. If
362 $archlib is the same as $privlib, then this is set to undef.
365 This variable conditionally defines the HAS_ATOLF symbol, which
366 indicates to the C program that the atolf() routine is available.
369 This variable conditionally defines the HAS_ATOLL symbol, which
370 indicates to the C program that the atoll() routine is available.
372 d_attribut (d_attribut.U):
373 This variable conditionally defines HASATTRIBUTE, which
374 indicates the C compiler can check for function attributes,
375 such as printf formats.
378 This variable conditionally defines the HAS_BCMP symbol if
379 the bcmp() routine is available to compare strings.
382 This variable conditionally defines the HAS_BCOPY symbol if
383 the bcopy() routine is available to copy strings.
385 d_bincompat5005 (bincompat5005.U):
386 This variable conditionally defines BINCOMPAT5005 so that embed.h
387 can take special action if this version of Perl should be
388 binary-compatible with Perl 5.005. This is impossible for builds
389 that use features like threads and multiplicity it is always $undef
393 This symbol conditionally defines the symbol BSD when running on a
396 d_bsdgetpgrp (d_getpgrp.U):
397 This variable conditionally defines USE_BSD_GETPGRP if
398 getpgrp needs one arguments whereas USG one needs none.
400 d_bsdsetpgrp (d_setpgrp.U):
401 This variable conditionally defines USE_BSD_SETPGRP if
402 setpgrp needs two arguments whereas USG one needs none.
403 See also d_setpgid for a POSIX interface.
406 This variable conditionally defines the HAS_BZERO symbol if
407 the bzero() routine is available to set memory to 0.
409 d_casti32 (d_casti32.U):
410 This variable conditionally defines CASTI32, which indicates
411 whether the C compiler can cast large floats to 32-bit ints.
413 d_castneg (d_castneg.U):
414 This variable conditionally defines CASTNEG, which indicates
415 wether the C compiler can cast negative float to unsigned.
417 d_charvspr (d_vprintf.U):
418 This variable conditionally defines CHARVSPRINTF if this system
419 has vsprintf returning type (char*). The trend seems to be to
420 declare it as "int vsprintf()".
423 This variable conditionally defines the HAS_CHOWN symbol, which
424 indicates to the C program that the chown() routine is available.
426 d_chroot (d_chroot.U):
427 This variable conditionally defines the HAS_CHROOT symbol, which
428 indicates to the C program that the chroot() routine is available.
430 d_chsize (d_chsize.U):
431 This variable conditionally defines the CHSIZE symbol, which
432 indicates to the C program that the chsize() routine is available
433 to truncate files. You might need a -lx to get this routine.
435 d_closedir (d_closedir.U):
436 This variable conditionally defines HAS_CLOSEDIR if closedir() is
440 This variable conditionally defines the HASCONST symbol, which
441 indicates to the C program that this C compiler knows about the
445 This variable conditionally defines the CRYPT symbol, which
446 indicates to the C program that the crypt() routine is available
447 to encrypt passwords and the like.
450 This variable conditionally defines the CSH symbol, which
451 indicates to the C program that the C-shell exists.
453 d_cuserid (d_cuserid.U):
454 This variable conditionally defines the HAS_CUSERID symbol, which
455 indicates to the C program that the cuserid() routine is available
456 to get character login names.
458 d_dbl_dig (d_dbl_dig.U):
459 This variable conditionally defines d_dbl_dig if this system's
460 header files provide DBL_DIG, which is the number of significant
461 digits in a double precision number.
463 d_difftime (d_difftime.U):
464 This variable conditionally defines the HAS_DIFFTIME symbol, which
465 indicates to the C program that the difftime() routine is available.
467 d_dirnamlen (i_dirent.U):
468 This variable conditionally defines DIRNAMLEN, which indicates
469 to the C program that the length of directory entry names is
470 provided by a d_namelen field.
472 d_dlerror (d_dlerror.U):
473 This variable conditionally defines the HAS_DLERROR symbol, which
474 indicates to the C program that the dlerror() routine is available.
476 d_dlopen (d_dlopen.U):
477 This variable conditionally defines the HAS_DLOPEN symbol, which
478 indicates to the C program that the dlopen() routine is available.
480 d_dlsymun (d_dlsymun.U):
481 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
482 indicates that we need to prepend an underscore to the symbol
483 name before calling dlsym().
485 d_dosuid (d_dosuid.U):
486 This variable conditionally defines the symbol DOSUID, which
487 tells the C program that it should insert setuid emulation code
488 on hosts which have setuid #! scripts disabled.
490 d_drand48proto (d_drand48proto.U):
491 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
492 which indicates to the C program that the system provides
493 a prototype for the drand48() function. Otherwise, it is
494 up to the program to supply one.
497 This variable conditionally defines HAS_DUP2 if dup2() is
498 available to duplicate file descriptors.
500 d_eaccess (d_eaccess.U):
501 This variable conditionally defines the HAS_EACCESS symbol, which
502 indicates to the C program that the eaccess() routine is available.
504 d_endgrent (d_endgrent.U):
505 This variable conditionally defines the HAS_ENDGRENT symbol, which
506 indicates to the C program that the endgrent() routine is available
507 for sequential access of the group database.
509 d_endhent (d_endhent.U):
510 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
511 available to close whatever was being used for host queries.
513 d_endnent (d_endnent.U):
514 This variable conditionally defines HAS_ENDNETENT if endnetent() is
515 available to close whatever was being used for network queries.
517 d_endpent (d_endpent.U):
518 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
519 available to close whatever was being used for protocol queries.
521 d_endpwent (d_endpwent.U):
522 This variable conditionally defines the HAS_ENDPWENT symbol, which
523 indicates to the C program that the endpwent() routine is available
524 for sequential access of the passwd database.
526 d_endsent (d_endsent.U):
527 This variable conditionally defines HAS_ENDSERVENT if endservent() is
528 available to close whatever was being used for service queries.
530 d_eofnblk (nblock_io.U):
531 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
532 when reading from a non-blocking I/O source.
535 This variable conditionally defines the symbols EUNICE and VAX, which
536 alerts the C program that it must deal with ideosyncracies of VMS.
538 d_fchmod (d_fchmod.U):
539 This variable conditionally defines the HAS_FCHMOD symbol, which
540 indicates to the C program that the fchmod() routine is available
541 to change mode of opened files.
543 d_fchown (d_fchown.U):
544 This variable conditionally defines the HAS_FCHOWN symbol, which
545 indicates to the C program that the fchown() routine is available
546 to change ownership of opened files.
549 This variable conditionally defines the HAS_FCNTL symbol, and indicates
550 whether the fcntl() function exists
552 d_fcntl_can_lock (d_fcntl_can_lock.U):
553 This variable conditionally defines the FCNTL_CAN_LOCK symbol
554 and indicates whether file locking with fcntl() works.
556 d_fd_macros (d_fd_set.U):
557 This variable contains the eventual value of the HAS_FD_MACROS symbol,
558 which indicates if your C compiler knows about the macros which
559 manipulate an fd_set.
561 d_fd_set (d_fd_set.U):
562 This variable contains the eventual value of the HAS_FD_SET symbol,
563 which indicates if your C compiler knows about the fd_set typedef.
565 d_fds_bits (d_fd_set.U):
566 This variable contains the eventual value of the HAS_FDS_BITS symbol,
567 which indicates if your fd_set typedef contains the fds_bits member.
568 If you have an fd_set typedef, but the dweebs who installed it did
569 a half-fast job and neglected to provide the macros to manipulate
570 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
572 d_fgetpos (d_fgetpos.U):
573 This variable conditionally defines HAS_FGETPOS if fgetpos() is
574 available to get the file position indicator.
576 d_flexfnam (d_flexfnam.U):
577 This variable conditionally defines the FLEXFILENAMES symbol, which
578 indicates that the system supports filenames longer than 14 characters.
581 This variable conditionally defines HAS_FLOCK if flock() is
582 available to do file locking.
585 This variable conditionally defines the HAS_FORK symbol, which
586 indicates to the C program that the fork() routine is available.
588 d_fpathconf (d_pathconf.U):
589 This variable conditionally defines the HAS_FPATHCONF symbol, which
590 indicates to the C program that the pathconf() routine is available
591 to determine file-system related limits and options associated
592 with a given open file descriptor.
594 d_fpos64_t (d_fpos64_t.U):
595 This symbol will be defined if the C compiler supports fpos64_t.
597 d_frexpl (d_frexpl.U):
598 This variable conditionally defines the HAS_FREXPL symbol, which
599 indicates to the C program that the frexpl() routine is available.
601 d_fs_data_s (d_fs_data_s.U):
602 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
603 which indicates that the struct fs_data is supported.
605 d_fseeko (d_fseeko.U):
606 This variable conditionally defines the HAS_FSEEKO symbol, which
607 indicates to the C program that the fseeko() routine is available.
609 d_fsetpos (d_fsetpos.U):
610 This variable conditionally defines HAS_FSETPOS if fsetpos() is
611 available to set the file position indicator.
613 d_fstatfs (d_fstatfs.U):
614 This variable conditionally defines the HAS_FSTATFS symbol, which
615 indicates to the C program that the fstatfs() routine is available.
617 d_fstatvfs (d_statvfs.U):
618 This variable conditionally defines the HAS_FSTATVFS symbol, which
619 indicates to the C program that the fstatvfs() routine is available.
622 This variable conditionally defines the HAS_FSYNC symbol, which
623 indicates to the C program that the fsync() routine is available.
625 d_ftello (d_ftello.U):
626 This variable conditionally defines the HAS_FTELLO symbol, which
627 indicates to the C program that the ftello() routine is available.
630 This variable conditionally defines the HAS_FTIME symbol, which indicates
631 that the ftime() routine exists. The ftime() routine is basically
632 a sub-second accuracy clock.
634 d_Gconvert (d_gconvert.U):
635 This variable holds what Gconvert is defined as to convert
636 floating point numbers into strings. It could be 'gconvert'
637 or a more complex macro emulating gconvert with gcvt() or sprintf.
639 d_Gconvert='gconvert((x),(n),(t),(b))'
640 d_Gconvert='gcvt((x),(n),(b))'
641 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
643 d_getcwd (d_getcwd.U):
644 This variable conditionally defines the HAS_GETCWD symbol, which
645 indicates to the C program that the getcwd() routine is available
646 to get the current working directory.
648 d_getespwnam (d_getespwnam.U):
649 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
650 available to retrieve enchanced (shadow) password entries by name.
652 d_getfsstat (d_getfsstat.U):
653 This variable conditionally defines the HAS_GETFSSTAT symbol, which
654 indicates to the C program that the getfsstat() routine is available.
656 d_getgrent (d_getgrent.U):
657 This variable conditionally defines the HAS_GETGRENT symbol, which
658 indicates to the C program that the getgrent() routine is available
659 for sequential access of the group database.
661 d_getgrps (d_getgrps.U):
662 This variable conditionally defines the HAS_GETGROUPS symbol, which
663 indicates to the C program that the getgroups() routine is available
664 to get the list of process groups.
666 d_gethbyaddr (d_gethbyad.U):
667 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
668 indicates to the C program that the gethostbyaddr() routine is available
669 to look up hosts by their IP addresses.
671 d_gethbyname (d_gethbynm.U):
672 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
673 indicates to the C program that the gethostbyname() routine is available
674 to look up host names in some data base or other.
676 d_gethent (d_gethent.U):
677 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
678 available to look up host names in some data base or another.
680 d_gethname (d_gethname.U):
681 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
682 indicates to the C program that the gethostname() routine may be
683 used to derive the host name.
685 d_gethostprotos (d_gethostprotos.U):
686 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
687 which indicates to the C program that <netdb.h> supplies
688 prototypes for the various gethost*() functions.
689 See also netdbtype.U for probing for various netdb types.
691 d_getlogin (d_getlogin.U):
692 This variable conditionally defines the HAS_GETLOGIN symbol, which
693 indicates to the C program that the getlogin() routine is available
694 to get the login name.
696 d_getmnt (d_getmnt.U):
697 This variable conditionally defines the HAS_GETMNT symbol, which
698 indicates to the C program that the getmnt() routine is available
699 to retrieve one or more mount info blocks by filename.
701 d_getmntent (d_getmntent.U):
702 This variable conditionally defines the HAS_GETMNTENT symbol, which
703 indicates to the C program that the getmntent() routine is available
704 to iterate through mounted files to get their mount info.
706 d_getnbyaddr (d_getnbyad.U):
707 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
708 indicates to the C program that the getnetbyaddr() routine is available
709 to look up networks by their IP addresses.
711 d_getnbyname (d_getnbynm.U):
712 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
713 indicates to the C program that the getnetbyname() routine is available
714 to look up networks by their names.
716 d_getnent (d_getnent.U):
717 This variable conditionally defines HAS_GETNETENT if getnetent() is
718 available to look up network names in some data base or another.
720 d_getnetprotos (d_getnetprotos.U):
721 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
722 which indicates to the C program that <netdb.h> supplies
723 prototypes for the various getnet*() functions.
724 See also netdbtype.U for probing for various netdb types.
726 d_getpagsz (d_getpagsz.U):
727 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
728 is available to get the system page size.
730 d_getpbyname (d_getprotby.U):
731 This variable conditionally defines the HAS_GETPROTOBYNAME
732 symbol, which indicates to the C program that the
733 getprotobyname() routine is available to look up protocols
736 d_getpbynumber (d_getprotby.U):
737 This variable conditionally defines the HAS_GETPROTOBYNUMBER
738 symbol, which indicates to the C program that the
739 getprotobynumber() routine is available to look up protocols
742 d_getpent (d_getpent.U):
743 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
744 available to look up protocols in some data base or another.
746 d_getpgid (d_getpgid.U):
747 This variable conditionally defines the HAS_GETPGID symbol, which
748 indicates to the C program that the getpgid(pid) function
749 is available to get the process group id.
751 d_getpgrp2 (d_getpgrp2.U):
752 This variable conditionally defines the HAS_GETPGRP2 symbol, which
753 indicates to the C program that the getpgrp2() (as in DG/UX) routine
754 is available to get the current process group.
756 d_getpgrp (d_getpgrp.U):
757 This variable conditionally defines HAS_GETPGRP if getpgrp() is
758 available to get the current process group.
760 d_getppid (d_getppid.U):
761 This variable conditionally defines the HAS_GETPPID symbol, which
762 indicates to the C program that the getppid() routine is available
763 to get the parent process ID.
765 d_getprior (d_getprior.U):
766 This variable conditionally defines HAS_GETPRIORITY if getpriority()
767 is available to get a process's priority.
769 d_getprotoprotos (d_getprotoprotos.U):
770 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
771 which indicates to the C program that <netdb.h> supplies
772 prototypes for the various getproto*() functions.
773 See also netdbtype.U for probing for various netdb types.
775 d_getprpwnam (d_getprpwnam.U):
776 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
777 available to retrieve protected (shadow) password entries by name.
779 d_getpwent (d_getpwent.U):
780 This variable conditionally defines the HAS_GETPWENT symbol, which
781 indicates to the C program that the getpwent() routine is available
782 for sequential access of the passwd database.
784 d_getsbyname (d_getsrvby.U):
785 This variable conditionally defines the HAS_GETSERVBYNAME
786 symbol, which indicates to the C program that the
787 getservbyname() routine is available to look up services
790 d_getsbyport (d_getsrvby.U):
791 This variable conditionally defines the HAS_GETSERVBYPORT
792 symbol, which indicates to the C program that the
793 getservbyport() routine is available to look up services
796 d_getsent (d_getsent.U):
797 This variable conditionally defines HAS_GETSERVENT if getservent() is
798 available to look up network services in some data base or another.
800 d_getservprotos (d_getservprotos.U):
801 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
802 which indicates to the C program that <netdb.h> supplies
803 prototypes for the various getserv*() functions.
804 See also netdbtype.U for probing for various netdb types.
806 d_getspnam (d_getspnam.U):
807 This variable conditionally defines HAS_GETSPNAM if getspnam() is
808 available to retrieve SysV shadow password entries by name.
810 d_gettimeod (d_ftime.U):
811 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
812 indicates that the gettimeofday() system call exists (to obtain a
813 sub-second accuracy clock). You should probably include <sys/resource.h>.
815 d_gnulibc (d_gnulibc.U):
816 Defined if we're dealing with the GNU C Library.
818 d_grpasswd (i_grp.U):
819 This variable conditionally defines GRPASSWD, which indicates
820 that struct group in <grp.h> contains gr_passwd.
822 d_hasmntopt (d_hasmntopt.U):
823 This variable conditionally defines the HAS_HASMNTOPT symbol, which
824 indicates to the C program that the hasmntopt() routine is available
825 to query the mount options of file systems.
828 This variable conditionally defines HAS_HTONL if htonl() and its
829 friends are available to do network order byte swapping.
832 This variable conditionally defines the HAS_ICONV symbol, which
833 indicates to the C program that the iconv() routine is available.
835 d_index (d_strchr.U):
836 This variable conditionally defines HAS_INDEX if index() and
837 rindex() are available for string searching.
839 d_inetaton (d_inetaton.U):
840 This variable conditionally defines the HAS_INET_ATON symbol, which
841 indicates to the C program that the inet_aton() function is available
842 to parse IP address "dotted-quad" strings.
844 d_int64_t (d_int64_t.U):
845 This symbol will be defined if the C compiler supports int64_t.
847 d_isascii (d_isascii.U):
848 This variable conditionally defines the HAS_ISASCII constant,
849 which indicates to the C program that isascii() is available.
852 This variable conditionally defines the HAS_ISNAN symbol, which
853 indicates to the C program that the isnan() routine is available.
855 d_isnanl (d_isnanl.U):
856 This variable conditionally defines the HAS_ISNANL symbol, which
857 indicates to the C program that the isnanl() routine is available.
859 d_killpg (d_killpg.U):
860 This variable conditionally defines the HAS_KILLPG symbol, which
861 indicates to the C program that the killpg() routine is available
862 to kill process groups.
864 d_lchown (d_lchown.U):
865 This variable conditionally defines the HAS_LCHOWN symbol, which
866 indicates to the C program that the lchown() routine is available
867 to operate on a symbolic link (instead of following the link).
869 d_ldbl_dig (d_ldbl_dig.U):
870 This variable conditionally defines d_ldbl_dig if this system's
871 header files provide LDBL_DIG, which is the number of significant
872 digits in a long double precision number.
875 This variable conditionally defines HAS_LINK if link() is
876 available to create hard links.
878 d_locconv (d_locconv.U):
879 This variable conditionally defines HAS_LOCALECONV if localeconv() is
880 available for numeric and monetary formatting conventions.
883 This variable conditionally defines HAS_LOCKF if lockf() is
884 available to do file locking.
886 d_longdbl (d_longdbl.U):
887 This variable conditionally defines HAS_LONG_DOUBLE if
888 the long double type is supported.
890 d_longlong (d_longlong.U):
891 This variable conditionally defines HAS_LONG_LONG if
892 the long long type is supported.
894 d_lseekproto (d_lseekproto.U):
895 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
896 which indicates to the C program that the system provides
897 a prototype for the lseek() function. Otherwise, it is
898 up to the program to supply one.
901 This variable conditionally defines HAS_LSTAT if lstat() is
902 available to do file stats on symbolic links.
904 d_madvise (d_madvise.U):
905 This variable conditionally defines HAS_MADVISE if madvise() is
906 available to map a file into memory.
909 This variable conditionally defines the HAS_MBLEN symbol, which
910 indicates to the C program that the mblen() routine is available
911 to find the number of bytes in a multibye character.
913 d_mbstowcs (d_mbstowcs.U):
914 This variable conditionally defines the HAS_MBSTOWCS symbol, which
915 indicates to the C program that the mbstowcs() routine is available
916 to convert a multibyte string into a wide character string.
918 d_mbtowc (d_mbtowc.U):
919 This variable conditionally defines the HAS_MBTOWC symbol, which
920 indicates to the C program that the mbtowc() routine is available
921 to convert multibyte to a wide character.
923 d_memchr (d_memchr.U):
924 This variable conditionally defines the HAS_MEMCHR symbol, which
925 indicates to the C program that the memchr() routine is available
926 to locate characters within a C string.
928 d_memcmp (d_memcmp.U):
929 This variable conditionally defines the HAS_MEMCMP symbol, which
930 indicates to the C program that the memcmp() routine is available
931 to compare blocks of memory.
933 d_memcpy (d_memcpy.U):
934 This variable conditionally defines the HAS_MEMCPY symbol, which
935 indicates to the C program that the memcpy() routine is available
936 to copy blocks of memory.
938 d_memmove (d_memmove.U):
939 This variable conditionally defines the HAS_MEMMOVE symbol, which
940 indicates to the C program that the memmove() routine is available
941 to copy potentatially overlapping blocks of memory.
943 d_memset (d_memset.U):
944 This variable conditionally defines the HAS_MEMSET symbol, which
945 indicates to the C program that the memset() routine is available
946 to set blocks of memory.
949 This variable conditionally defines the HAS_MKDIR symbol, which
950 indicates to the C program that the mkdir() routine is available
951 to create directories..
953 d_mkdtemp (d_mkdtemp.U):
954 This variable conditionally defines the HAS_MKDTEMP symbol, which
955 indicates to the C program that the mkdtemp() routine is available
956 to exclusively create a uniquely named temporary directory.
958 d_mkfifo (d_mkfifo.U):
959 This variable conditionally defines the HAS_MKFIFO symbol, which
960 indicates to the C program that the mkfifo() routine is available.
962 d_mkstemp (d_mkstemp.U):
963 This variable conditionally defines the HAS_MKSTEMP symbol, which
964 indicates to the C program that the mkstemp() routine is available
965 to exclusively create and open a uniquely named temporary file.
967 d_mkstemps (d_mkstemps.U):
968 This variable conditionally defines the HAS_MKSTEMPS symbol, which
969 indicates to the C program that the mkstemps() routine is available
970 to exclusively create and open a uniquely named (with a suffix)
973 d_mktime (d_mktime.U):
974 This variable conditionally defines the HAS_MKTIME symbol, which
975 indicates to the C program that the mktime() routine is available.
978 This variable conditionally defines HAS_MMAP if mmap() is
979 available to map a file into memory.
982 This variable conditionally defines the HAS_MODFL symbol, which
983 indicates to the C program that the modfl() routine is available.
985 d_mprotect (d_mprotect.U):
986 This variable conditionally defines HAS_MPROTECT if mprotect() is
987 available to modify the access protection of a memory mapped file.
990 This variable conditionally defines the HAS_MSG symbol, which
991 indicates that the entire msg*(2) library is present.
993 d_msg_ctrunc (d_socket.U):
994 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
995 which indicates that the MSG_CTRUNC is available. #ifdef is
996 not enough because it may be an enum, glibc has been known to do this.
998 d_msg_dontroute (d_socket.U):
999 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1000 which indicates that the MSG_DONTROUTE is available. #ifdef is
1001 not enough because it may be an enum, glibc has been known to do this.
1003 d_msg_oob (d_socket.U):
1004 This variable conditionally defines the HAS_MSG_OOB symbol,
1005 which indicates that the MSG_OOB is available. #ifdef is
1006 not enough because it may be an enum, glibc has been known to do this.
1008 d_msg_peek (d_socket.U):
1009 This variable conditionally defines the HAS_MSG_PEEK symbol,
1010 which indicates that the MSG_PEEK is available. #ifdef is
1011 not enough because it may be an enum, glibc has been known to do this.
1013 d_msg_proxy (d_socket.U):
1014 This variable conditionally defines the HAS_MSG_PROXY symbol,
1015 which indicates that the MSG_PROXY is available. #ifdef is
1016 not enough because it may be an enum, glibc has been known to do this.
1018 d_msgctl (d_msgctl.U):
1019 This variable conditionally defines the HAS_MSGCTL symbol, which
1020 indicates to the C program that the msgctl() routine is available.
1022 d_msgget (d_msgget.U):
1023 This variable conditionally defines the HAS_MSGGET symbol, which
1024 indicates to the C program that the msgget() routine is available.
1026 d_msgrcv (d_msgrcv.U):
1027 This variable conditionally defines the HAS_MSGRCV symbol, which
1028 indicates to the C program that the msgrcv() routine is available.
1030 d_msgsnd (d_msgsnd.U):
1031 This variable conditionally defines the HAS_MSGSND symbol, which
1032 indicates to the C program that the msgsnd() routine is available.
1034 d_msync (d_msync.U):
1035 This variable conditionally defines HAS_MSYNC if msync() is
1036 available to synchronize a mapped file.
1038 d_munmap (d_munmap.U):
1039 This variable conditionally defines HAS_MUNMAP if munmap() is
1040 available to unmap a region mapped by mmap().
1042 d_mymalloc (mallocsrc.U):
1043 This variable conditionally defines MYMALLOC in case other parts
1044 of the source want to take special action if MYMALLOC is used.
1045 This may include different sorts of profiling or error detection.
1048 This variable conditionally defines the HAS_NICE symbol, which
1049 indicates to the C program that the nice() routine is available.
1051 d_nv_preserves_uv (perlxv.U):
1052 This variable indicates whether a variable of type nvtype
1053 can preserve all the bits a variable of type uvtype.
1055 d_nv_preserves_uv_bits (perlxv.U):
1056 This variable indicates how many of bits type uvtype
1057 a variable nvtype can preserve.
1059 d_off64_t (d_off64_t.U):
1060 This symbol will be defined if the C compiler supports off64_t.
1062 d_old_pthread_create_joinable (d_pthrattrj.U):
1063 This variable conditionally defines pthread_create_joinable.
1064 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1066 d_oldpthreads (usethreads.U):
1067 This variable conditionally defines the OLD_PTHREADS_API symbol,
1068 and indicates that Perl should be built to use the old
1069 draft POSIX threads API. This is only potentially meaningful if
1072 d_oldsock (d_socket.U):
1073 This variable conditionally defines the OLDSOCKET symbol, which
1074 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1076 d_open3 (d_open3.U):
1077 This variable conditionally defines the HAS_OPEN3 manifest constant,
1078 which indicates to the C program that the 3 argument version of
1079 the open(2) function is available.
1081 d_pathconf (d_pathconf.U):
1082 This variable conditionally defines the HAS_PATHCONF symbol, which
1083 indicates to the C program that the pathconf() routine is available
1084 to determine file-system related limits and options associated
1085 with a given filename.
1087 d_pause (d_pause.U):
1088 This variable conditionally defines the HAS_PAUSE symbol, which
1089 indicates to the C program that the pause() routine is available
1090 to suspend a process until a signal is received.
1092 d_perl_otherlibdirs (otherlibdirs.U):
1093 This variable conditionally defines PERL_OTHERLIBDIRS, which
1094 contains a colon-separated set of paths for the perl binary to
1095 include in @INC. See also otherlibdirs.
1097 d_phostname (d_gethname.U):
1098 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1099 contains the shell command which, when fed to popen(), may be
1100 used to derive the host name.
1103 This variable conditionally defines the HAS_PIPE symbol, which
1104 indicates to the C program that the pipe() routine is available
1105 to create an inter-process channel.
1108 This variable conditionally defines the HAS_POLL symbol, which
1109 indicates to the C program that the poll() routine is available
1110 to poll active file descriptors.
1112 d_portable (d_portable.U):
1113 This variable conditionally defines the PORTABLE symbol, which
1114 indicates to the C program that it should not assume that it is
1115 running on the machine it was compiled on.
1117 d_PRId64 (quadfio.U):
1118 This variable conditionally defines the PERL_PRId64 symbol, which
1119 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1121 d_PRIeldbl (longdblfio.U):
1122 This variable conditionally defines the PERL_PRIfldbl symbol, which
1123 indiciates that stdio has a symbol to print long doubles.
1125 d_PRIEUldbl (longdblfio.U):
1126 This variable conditionally defines the PERL_PRIfldbl symbol, which
1127 indiciates that stdio has a symbol to print long doubles.
1128 The 'U' in the name is to separate this from d_PRIeldbl so that even
1129 case-blind systems can see the difference.
1131 d_PRIfldbl (longdblfio.U):
1132 This variable conditionally defines the PERL_PRIfldbl symbol, which
1133 indiciates that stdio has a symbol to print long doubles.
1135 d_PRIFUldbl (longdblfio.U):
1136 This variable conditionally defines the PERL_PRIfldbl symbol, which
1137 indiciates that stdio has a symbol to print long doubles.
1138 The 'U' in the name is to separate this from d_PRIfldbl so that even
1139 case-blind systems can see the difference.
1141 d_PRIgldbl (longdblfio.U):
1142 This variable conditionally defines the PERL_PRIfldbl symbol, which
1143 indiciates that stdio has a symbol to print long doubles.
1145 d_PRIGUldbl (longdblfio.U):
1146 This variable conditionally defines the PERL_PRIfldbl symbol, which
1147 indiciates that stdio has a symbol to print long doubles.
1148 The 'U' in the name is to separate this from d_PRIgldbl so that even
1149 case-blind systems can see the difference.
1151 d_PRIi64 (quadfio.U):
1152 This variable conditionally defines the PERL_PRIi64 symbol, which
1153 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1155 d_PRIo64 (quadfio.U):
1156 This variable conditionally defines the PERL_PRIo64 symbol, which
1157 indiciates that stdio has a symbol to print 64-bit octal numbers.
1159 d_PRIu64 (quadfio.U):
1160 This variable conditionally defines the PERL_PRIu64 symbol, which
1161 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1164 d_PRIx64 (quadfio.U):
1165 This variable conditionally defines the PERL_PRIx64 symbol, which
1166 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1168 d_PRIXU64 (quadfio.U):
1169 This variable conditionally defines the PERL_PRIXU64 symbol, which
1170 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1171 The 'U' in the name is to separate this from d_PRIx64 so that even
1172 case-blind systems can see the difference.
1174 d_pthread_yield (d_pthread_y.U):
1175 This variable conditionally defines the HAS_PTHREAD_YIELD
1176 symbol if the pthread_yield routine is available to yield
1177 the execution of the current thread.
1180 This variable conditionally defines PWAGE, which indicates
1181 that struct passwd contains pw_age.
1183 d_pwchange (i_pwd.U):
1184 This variable conditionally defines PWCHANGE, which indicates
1185 that struct passwd contains pw_change.
1187 d_pwclass (i_pwd.U):
1188 This variable conditionally defines PWCLASS, which indicates
1189 that struct passwd contains pw_class.
1191 d_pwcomment (i_pwd.U):
1192 This variable conditionally defines PWCOMMENT, which indicates
1193 that struct passwd contains pw_comment.
1195 d_pwexpire (i_pwd.U):
1196 This variable conditionally defines PWEXPIRE, which indicates
1197 that struct passwd contains pw_expire.
1199 d_pwgecos (i_pwd.U):
1200 This variable conditionally defines PWGECOS, which indicates
1201 that struct passwd contains pw_gecos.
1203 d_pwpasswd (i_pwd.U):
1204 This variable conditionally defines PWPASSWD, which indicates
1205 that struct passwd contains pw_passwd.
1207 d_pwquota (i_pwd.U):
1208 This variable conditionally defines PWQUOTA, which indicates
1209 that struct passwd contains pw_quota.
1211 d_qgcvt (d_qgcvt.U):
1212 This variable conditionally defines the HAS_QGCVT symbol, which
1213 indicates to the C program that the qgcvt() routine is available.
1215 d_quad (quadtype.U):
1216 This variable, if defined, tells that there's a 64-bit integer type,
1219 d_readdir (d_readdir.U):
1220 This variable conditionally defines HAS_READDIR if readdir() is
1221 available to read directory entries.
1223 d_readlink (d_readlink.U):
1224 This variable conditionally defines the HAS_READLINK symbol, which
1225 indicates to the C program that the readlink() routine is available
1226 to read the value of a symbolic link.
1228 d_rename (d_rename.U):
1229 This variable conditionally defines the HAS_RENAME symbol, which
1230 indicates to the C program that the rename() routine is available
1233 d_rewinddir (d_readdir.U):
1234 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1237 d_rmdir (d_rmdir.U):
1238 This variable conditionally defines HAS_RMDIR if rmdir() is
1239 available to remove directories.
1241 d_safebcpy (d_safebcpy.U):
1242 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1243 the bcopy() routine can do overlapping copies.
1245 d_safemcpy (d_safemcpy.U):
1246 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1247 the memcpy() routine can do overlapping copies.
1249 d_sanemcmp (d_sanemcmp.U):
1250 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1251 the memcpy() routine is available and can be used to compare relative
1252 magnitudes of chars with their high bits set.
1254 d_sched_yield (d_pthread_y.U):
1255 This variable conditionally defines the HAS_SCHED_YIELD
1256 symbol if the sched_yield routine is available to yield
1257 the execution of the current thread.
1259 d_scm_rights (d_socket.U):
1260 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1261 which indicates that the SCM_RIGHTS is available. #ifdef is
1262 not enough because it may be an enum, glibc has been known to do this.
1264 d_SCNfldbl (longdblfio.U):
1265 This variable conditionally defines the PERL_PRIfldbl symbol, which
1266 indiciates that stdio has a symbol to scan long doubles.
1268 d_seekdir (d_readdir.U):
1269 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1272 d_select (d_select.U):
1273 This variable conditionally defines HAS_SELECT if select() is
1274 available to select active file descriptors. A <sys/time.h>
1275 inclusion may be necessary for the timeout field.
1278 This variable conditionally defines the HAS_SEM symbol, which
1279 indicates that the entire sem*(2) library is present.
1281 d_semctl (d_semctl.U):
1282 This variable conditionally defines the HAS_SEMCTL symbol, which
1283 indicates to the C program that the semctl() routine is available.
1285 d_semctl_semid_ds (d_union_semun.U):
1286 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1287 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1289 d_semctl_semun (d_union_semun.U):
1290 This variable conditionally defines USE_SEMCTL_SEMUN, which
1291 indicates that union semun is to be used for semctl IPC_STAT.
1293 d_semget (d_semget.U):
1294 This variable conditionally defines the HAS_SEMGET symbol, which
1295 indicates to the C program that the semget() routine is available.
1297 d_semop (d_semop.U):
1298 This variable conditionally defines the HAS_SEMOP symbol, which
1299 indicates to the C program that the semop() routine is available.
1301 d_setegid (d_setegid.U):
1302 This variable conditionally defines the HAS_SETEGID symbol, which
1303 indicates to the C program that the setegid() routine is available
1304 to change the effective gid of the current program.
1306 d_seteuid (d_seteuid.U):
1307 This variable conditionally defines the HAS_SETEUID symbol, which
1308 indicates to the C program that the seteuid() routine is available
1309 to change the effective uid of the current program.
1311 d_setgrent (d_setgrent.U):
1312 This variable conditionally defines the HAS_SETGRENT symbol, which
1313 indicates to the C program that the setgrent() routine is available
1314 for initializing sequential access to the group database.
1316 d_setgrps (d_setgrps.U):
1317 This variable conditionally defines the HAS_SETGROUPS symbol, which
1318 indicates to the C program that the setgroups() routine is available
1319 to set the list of process groups.
1321 d_sethent (d_sethent.U):
1322 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1325 d_setlinebuf (d_setlnbuf.U):
1326 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1327 indicates to the C program that the setlinebuf() routine is available
1328 to change stderr or stdout from block-buffered or unbuffered to a
1331 d_setlocale (d_setlocale.U):
1332 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1333 available to handle locale-specific ctype implementations.
1335 d_setnent (d_setnent.U):
1336 This variable conditionally defines HAS_SETNETENT if setnetent() is
1339 d_setpent (d_setpent.U):
1340 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1343 d_setpgid (d_setpgid.U):
1344 This variable conditionally defines the HAS_SETPGID symbol if the
1345 setpgid(pid, gpid) function is available to set process group ID.
1347 d_setpgrp2 (d_setpgrp2.U):
1348 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1349 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1350 is available to set the current process group.
1352 d_setpgrp (d_setpgrp.U):
1353 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1354 available to set the current process group.
1356 d_setprior (d_setprior.U):
1357 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1358 is available to set a process's priority.
1360 d_setproctitle (d_setproctitle.U):
1361 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1362 which indicates to the C program that the setproctitle() routine
1365 d_setpwent (d_setpwent.U):
1366 This variable conditionally defines the HAS_SETPWENT symbol, which
1367 indicates to the C program that the setpwent() routine is available
1368 for initializing sequential access to the passwd database.
1370 d_setregid (d_setregid.U):
1371 This variable conditionally defines HAS_SETREGID if setregid() is
1372 available to change the real and effective gid of the current
1375 d_setresgid (d_setregid.U):
1376 This variable conditionally defines HAS_SETRESGID if setresgid() is
1377 available to change the real, effective and saved gid of the current
1380 d_setresuid (d_setreuid.U):
1381 This variable conditionally defines HAS_SETREUID if setresuid() is
1382 available to change the real, effective and saved uid of the current
1385 d_setreuid (d_setreuid.U):
1386 This variable conditionally defines HAS_SETREUID if setreuid() is
1387 available to change the real and effective uid of the current
1390 d_setrgid (d_setrgid.U):
1391 This variable conditionally defines the HAS_SETRGID symbol, which
1392 indicates to the C program that the setrgid() routine is available
1393 to change the real gid of the current program.
1395 d_setruid (d_setruid.U):
1396 This variable conditionally defines the HAS_SETRUID symbol, which
1397 indicates to the C program that the setruid() routine is available
1398 to change the real uid of the current program.
1400 d_setsent (d_setsent.U):
1401 This variable conditionally defines HAS_SETSERVENT if setservent() is
1404 d_setsid (d_setsid.U):
1405 This variable conditionally defines HAS_SETSID if setsid() is
1406 available to set the process group ID.
1408 d_setvbuf (d_setvbuf.U):
1409 This variable conditionally defines the HAS_SETVBUF symbol, which
1410 indicates to the C program that the setvbuf() routine is available
1411 to change buffering on an open stdio stream.
1414 This variable conditionally defines the USE_SFIO symbol,
1415 and indicates whether sfio is available (and should be used).
1418 This variable conditionally defines the HAS_SHM symbol, which
1419 indicates that the entire shm*(2) library is present.
1421 d_shmat (d_shmat.U):
1422 This variable conditionally defines the HAS_SHMAT symbol, which
1423 indicates to the C program that the shmat() routine is available.
1425 d_shmatprototype (d_shmat.U):
1426 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1427 symbol, which indicates that sys/shm.h has a prototype for
1430 d_shmctl (d_shmctl.U):
1431 This variable conditionally defines the HAS_SHMCTL symbol, which
1432 indicates to the C program that the shmctl() routine is available.
1434 d_shmdt (d_shmdt.U):
1435 This variable conditionally defines the HAS_SHMDT symbol, which
1436 indicates to the C program that the shmdt() routine is available.
1438 d_shmget (d_shmget.U):
1439 This variable conditionally defines the HAS_SHMGET symbol, which
1440 indicates to the C program that the shmget() routine is available.
1442 d_sigaction (d_sigaction.U):
1443 This variable conditionally defines the HAS_SIGACTION symbol, which
1444 indicates that the Vr4 sigaction() routine is available.
1446 d_sigsetjmp (d_sigsetjmp.U):
1447 This variable conditionally defines the HAS_SIGSETJMP symbol,
1448 which indicates that the sigsetjmp() routine is available to
1449 call setjmp() and optionally save the process's signal mask.
1451 d_socket (d_socket.U):
1452 This variable conditionally defines HAS_SOCKET, which indicates
1453 that the BSD socket interface is supported.
1455 d_socklen_t (d_socklen_t.U):
1456 This symbol will be defined if the C compiler supports socklen_t.
1458 d_sockpair (d_socket.U):
1459 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1460 indicates that the BSD socketpair() is supported.
1462 d_socks5_init (d_socks5_init.U):
1463 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1464 indicates to the C program that the socks5_init() routine is available.
1466 d_sqrtl (d_sqrtl.U):
1467 This variable conditionally defines the HAS_SQRTL symbol, which
1468 indicates to the C program that the sqrtl() routine is available.
1470 d_statblks (d_statblks.U):
1471 This variable conditionally defines USE_STAT_BLOCKS
1472 if this system has a stat structure declaring
1473 st_blksize and st_blocks.
1475 d_statfs_f_flags (d_statfs_f_flags.U):
1476 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1477 symbol, which indicates to struct statfs from has f_flags member.
1478 This kind of struct statfs is coming from sys/mount.h (BSD),
1479 not from sys/statfs.h (SYSV).
1481 d_statfs_s (d_statfs_s.U):
1482 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1483 which indicates that the struct statfs is supported.
1485 d_statvfs (d_statvfs.U):
1486 This variable conditionally defines the HAS_STATVFS symbol, which
1487 indicates to the C program that the statvfs() routine is available.
1489 d_stdio_cnt_lval (d_stdstdio.U):
1490 This variable conditionally defines STDIO_CNT_LVALUE if the
1491 FILE_cnt macro can be used as an lvalue.
1493 d_stdio_ptr_lval (d_stdstdio.U):
1494 This variable conditionally defines STDIO_PTR_LVALUE if the
1495 FILE_ptr macro can be used as an lvalue.
1497 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1498 This symbol is defined if using the FILE_ptr macro as an lvalue
1499 to increase the pointer by n leaves File_cnt(fp) unchanged.
1501 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1502 This symbol is defined if using the FILE_ptr macro as an lvalue
1503 to increase the pointer by n has the side effect of decreasing the
1504 value of File_cnt(fp) by n.
1506 d_stdio_stream_array (stdio_streams.U):
1507 This variable tells whether there is an array holding
1510 d_stdiobase (d_stdstdio.U):
1511 This variable conditionally defines USE_STDIO_BASE if this system
1512 has a FILE structure declaring a usable _base field (or equivalent)
1515 d_stdstdio (d_stdstdio.U):
1516 This variable conditionally defines USE_STDIO_PTR if this system
1517 has a FILE structure declaring usable _ptr and _cnt fields (or
1518 equivalent) in stdio.h.
1520 d_strchr (d_strchr.U):
1521 This variable conditionally defines HAS_STRCHR if strchr() and
1522 strrchr() are available for string searching.
1524 d_strcoll (d_strcoll.U):
1525 This variable conditionally defines HAS_STRCOLL if strcoll() is
1526 available to compare strings using collating information.
1528 d_strctcpy (d_strctcpy.U):
1529 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1530 indicates to the C program that this C compiler knows how to copy
1533 d_strerrm (d_strerror.U):
1534 This variable holds what Strerrr is defined as to translate an error
1535 code condition into an error message string. It could be 'strerror'
1536 or a more complex macro emulating strrror with sys_errlist[], or the
1537 "unknown" string when both strerror and sys_errlist are missing.
1539 d_strerror (d_strerror.U):
1540 This variable conditionally defines HAS_STRERROR if strerror() is
1541 available to translate error numbers to strings.
1543 d_strtod (d_strtod.U):
1544 This variable conditionally defines the HAS_STRTOD symbol, which
1545 indicates to the C program that the strtod() routine is available
1546 to provide better numeric string conversion than atof().
1548 d_strtol (d_strtol.U):
1549 This variable conditionally defines the HAS_STRTOL symbol, which
1550 indicates to the C program that the strtol() routine is available
1551 to provide better numeric string conversion than atoi() and friends.
1553 d_strtold (d_strtold.U):
1554 This variable conditionally defines the HAS_STRTOLD symbol, which
1555 indicates to the C program that the strtold() routine is available.
1557 d_strtoll (d_strtoll.U):
1558 This variable conditionally defines the HAS_STRTOLL symbol, which
1559 indicates to the C program that the strtoll() routine is available.
1561 d_strtoul (d_strtoul.U):
1562 This variable conditionally defines the HAS_STRTOUL symbol, which
1563 indicates to the C program that the strtoul() routine is available
1564 to provide conversion of strings to unsigned long.
1566 d_strtoull (d_strtoull.U):
1567 This variable conditionally defines the HAS_STRTOULL symbol, which
1568 indicates to the C program that the strtoull() routine is available.
1570 d_strtouq (d_strtouq.U):
1571 This variable conditionally defines the HAS_STRTOUQ symbol, which
1572 indicates to the C program that the strtouq() routine is available.
1574 d_strxfrm (d_strxfrm.U):
1575 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1576 available to transform strings.
1578 d_suidsafe (d_dosuid.U):
1579 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1580 if setuid scripts can be secure. This test looks in /dev/fd/.
1582 d_symlink (d_symlink.U):
1583 This variable conditionally defines the HAS_SYMLINK symbol, which
1584 indicates to the C program that the symlink() routine is available
1585 to create symbolic links.
1587 d_syscall (d_syscall.U):
1588 This variable conditionally defines HAS_SYSCALL if syscall() is
1589 available call arbitrary system calls.
1591 d_sysconf (d_sysconf.U):
1592 This variable conditionally defines the HAS_SYSCONF symbol, which
1593 indicates to the C program that the sysconf() routine is available
1594 to determine system related limits and options.
1596 d_sysernlst (d_strerror.U):
1597 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1598 is available to translate error numbers to the symbolic name.
1600 d_syserrlst (d_strerror.U):
1601 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1602 available to translate error numbers to strings.
1604 d_system (d_system.U):
1605 This variable conditionally defines HAS_SYSTEM if system() is
1606 available to issue a shell command.
1608 d_tcgetpgrp (d_tcgtpgrp.U):
1609 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1610 indicates to the C program that the tcgetpgrp() routine is available.
1611 to get foreground process group ID.
1613 d_tcsetpgrp (d_tcstpgrp.U):
1614 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1615 indicates to the C program that the tcsetpgrp() routine is available
1616 to set foreground process group ID.
1618 d_telldir (d_readdir.U):
1619 This variable conditionally defines HAS_TELLDIR if telldir() is
1622 d_telldirproto (d_telldirproto.U):
1623 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1624 which indicates to the C program that the system provides
1625 a prototype for the telldir() function. Otherwise, it is
1626 up to the program to supply one.
1629 This variable conditionally defines the HAS_TIME symbol, which indicates
1630 that the time() routine exists. The time() routine is normaly
1631 provided on UNIX systems.
1633 d_times (d_times.U):
1634 This variable conditionally defines the HAS_TIMES symbol, which indicates
1635 that the times() routine exists. The times() routine is normaly
1636 provided on UNIX systems. You may have to include <sys/times.h>.
1638 d_truncate (d_truncate.U):
1639 This variable conditionally defines HAS_TRUNCATE if truncate() is
1640 available to truncate files.
1642 d_tzname (d_tzname.U):
1643 This variable conditionally defines HAS_TZNAME if tzname[] is
1644 available to access timezone names.
1646 d_umask (d_umask.U):
1647 This variable conditionally defines the HAS_UMASK symbol, which
1648 indicates to the C program that the umask() routine is available.
1649 to set and get the value of the file creation mask.
1651 d_uname (d_gethname.U):
1652 This variable conditionally defines the HAS_UNAME symbol, which
1653 indicates to the C program that the uname() routine may be
1654 used to derive the host name.
1656 d_union_semun (d_union_semun.U):
1657 This variable conditionally defines HAS_UNION_SEMUN if the
1658 union semun is defined by including <sys/sem.h>.
1660 d_ustat (d_ustat.U):
1661 This variable conditionally defines HAS_USTAT if ustat() is
1662 available to query file system statistics by dev_t.
1664 d_vendorarch (vendorarch.U):
1665 This variable conditionally defined PERL_VENDORARCH.
1667 d_vendorbin (vendorbin.U):
1668 This variable conditionally defines PERL_VENDORBIN.
1670 d_vendorlib (vendorlib.U):
1671 This variable conditionally defines PERL_VENDORLIB.
1673 d_vfork (d_vfork.U):
1674 This variable conditionally defines the HAS_VFORK symbol, which
1675 indicates the vfork() routine is available.
1677 d_void_closedir (d_closedir.U):
1678 This variable conditionally defines VOID_CLOSEDIR if closedir()
1679 does not return a value.
1681 d_voidsig (d_voidsig.U):
1682 This variable conditionally defines VOIDSIG if this system
1683 declares "void (*signal(...))()" in signal.h. The old way was to
1684 declare it as "int (*signal(...))()".
1686 d_voidtty (i_sysioctl.U):
1687 This variable conditionally defines USE_IOCNOTTY to indicate that the
1688 ioctl() call with TIOCNOTTY should be used to void tty association.
1689 Otherwise (on USG probably), it is enough to close the standard file
1690 decriptors and do a setpgrp().
1692 d_volatile (d_volatile.U):
1693 This variable conditionally defines the HASVOLATILE symbol, which
1694 indicates to the C program that this C compiler knows about the
1695 volatile declaration.
1697 d_vprintf (d_vprintf.U):
1698 This variable conditionally defines the HAS_VPRINTF symbol, which
1699 indicates to the C program that the vprintf() routine is available
1700 to printf with a pointer to an argument list.
1702 d_wait4 (d_wait4.U):
1703 This variable conditionally defines the HAS_WAIT4 symbol, which
1704 indicates the wait4() routine is available.
1706 d_waitpid (d_waitpid.U):
1707 This variable conditionally defines HAS_WAITPID if waitpid() is
1708 available to wait for child process.
1710 d_wcstombs (d_wcstombs.U):
1711 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1712 indicates to the C program that the wcstombs() routine is available
1713 to convert wide character strings to multibyte strings.
1715 d_wctomb (d_wctomb.U):
1716 This variable conditionally defines the HAS_WCTOMB symbol, which
1717 indicates to the C program that the wctomb() routine is available
1718 to convert a wide character to a multibyte.
1721 This variable conditionally defines the symbol XENIX, which alerts
1722 the C program that it runs under Xenix.
1725 This variable is used internally by Configure to determine the
1726 full pathname (if any) of the date program. After Configure runs,
1727 the value is reset to a plain "date" and is not useful.
1729 db_hashtype (i_db.U):
1730 This variable contains the type of the hash structure element
1731 in the <db.h> header file. In older versions of DB, it was
1732 int, while in newer ones it is u_int32_t.
1734 db_prefixtype (i_db.U):
1735 This variable contains the type of the prefix structure element
1736 in the <db.h> header file. In older versions of DB, it was
1737 int, while in newer ones it is size_t.
1739 defvoidused (voidflags.U):
1740 This variable contains the default value of the VOIDUSED symbol (15).
1742 direntrytype (i_dirent.U):
1743 This symbol is set to 'struct direct' or 'struct dirent' depending on
1744 whether dirent is available or not. You should use this pseudo type to
1745 portably declare your directory entries.
1748 This variable contains the extension that is to be used for the
1749 dynamically loaded modules that perl generaties.
1752 This variable contains the name of the dynamic loading file that
1753 will be used with the package.
1755 doublesize (doublesize.U):
1756 This variable contains the value of the DOUBLESIZE symbol, which
1757 indicates to the C program how many bytes there are in a double.
1759 drand01 (randfunc.U):
1760 Indicates the macro to be used to generate normalized
1761 random numbers. Uses randfunc, often divided by
1762 (double) (((unsigned long) 1 << randbits)) in order to
1763 normalize the result.
1764 In C programs, the macro 'Drand01' is mapped to drand01.
1766 dynamic_ext (Extensions.U):
1767 This variable holds a list of XS extension files we want to
1768 link dynamically into the package. It is used by Makefile.
1770 eagain (nblock_io.U):
1771 This variable bears the symbolic errno code set by read() when no
1772 data is present on the file and non-blocking I/O was enabled (otherwise,
1773 read() blocks naturally).
1776 This variable conditionally defines EBCDIC if this
1777 system uses EBCDIC encoding. Among other things, this
1778 means that the character ranges are not contiguous.
1782 This variable is used internally by Configure to determine the
1783 full pathname (if any) of the echo program. After Configure runs,
1784 the value is reset to a plain "echo" and is not useful.
1787 This variable is used internally by Configure to determine the
1788 full pathname (if any) of the egrep program. After Configure runs,
1789 the value is reset to a plain "egrep" and is not useful.
1792 This variable is defined but not used by Configure.
1793 The value is a plain '' and is not useful.
1796 When running under Eunice this variable contains a command which will
1797 convert a shell script to the proper form of text file for it to be
1798 executable by the shell. On other systems it is a no-op.
1801 This is an old synonym for _exe.
1804 This variable is used internally by Configure to determine the
1805 full pathname (if any) of the expr program. After Configure runs,
1806 the value is reset to a plain "expr" and is not useful.
1808 extensions (Extensions.U):
1809 This variable holds a list of all extension files (both XS and
1810 non-xs linked into the package. It is propagated to Config.pm
1811 and is typically used to test whether a particular extesion
1814 fflushall (fflushall.U):
1815 This symbol, if defined, tells that to flush
1816 all pending stdio output one must loop through all
1817 the stdio file handles stored in an array and fflush them.
1818 Note that if fflushNULL is defined, fflushall will not
1819 even be probed for and will be left undefined.
1821 fflushNULL (fflushall.U):
1822 This symbol, if defined, tells that fflush(NULL) does flush
1823 all pending stdio output.
1826 This variable is defined but not used by Configure.
1827 The value is a plain '' and is not useful.
1829 firstmakefile (Unix.U):
1830 This variable defines the first file searched by make. On unix,
1831 it is makefile (then Makefile). On case-insensitive systems,
1832 it might be something else. This is only used to deal with
1833 convoluted make depend tricks.
1836 This variable is defined but not used by Configure.
1837 The value is a plain '' and is not useful.
1839 fpossize (fpossize.U):
1840 This variable contains the size of a fpostype in bytes.
1842 fpostype (fpostype.U):
1843 This variable defines Fpos_t to be something like fpos_t, long,
1844 uint, or whatever type is used to declare file positions in libc.
1846 freetype (mallocsrc.U):
1847 This variable contains the return type of free(). It is usually
1848 void, but occasionally int.
1851 This variable contains the full pathname to 'ar', whether or
1852 not the user has specified 'portability'. This is only used
1856 This variable contains the full pathname to 'csh', whether or
1857 not the user has specified 'portability'. This is only used
1858 in the compiled C program, and we assume that all systems which
1859 can share this executable will have the same full pathname to
1862 full_sed (Loc_sed.U):
1863 This variable contains the full pathname to 'sed', whether or
1864 not the user has specified 'portability'. This is only used
1865 in the compiled C program, and we assume that all systems which
1866 can share this executable will have the same full pathname to
1869 gccosandvers (gccvers.U):
1870 If GNU cc (gcc) is used, this variable the operating system and
1871 version used to compile the gcc. It is set to '' if not gcc,
1872 or if nothing useful can be parsed as the os version.
1874 gccversion (gccvers.U):
1875 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1876 indicate whether the compiler is version 1 or 2. This is used in
1877 setting some of the default cflags. It is set to '' if not gcc.
1880 This variable contains the format string used for printing a Gid_t.
1882 gidsign (gidsign.U):
1883 This variable contains the signedness of a gidtype.
1884 1 for unsigned, -1 for signed.
1886 gidsize (gidsize.U):
1887 This variable contains the size of a gidtype in bytes.
1889 gidtype (gidtype.U):
1890 This variable defines Gid_t to be something like gid_t, int,
1891 ushort, or whatever type is used to declare the return type
1892 of getgid(). Typically, it is the type of group ids in the kernel.
1895 This variable holds the general path (space-separated) used to
1896 find libraries. It may contain directories that do not exist on
1897 this platform, libpth is the cleaned-up version.
1900 This variable is used internally by Configure to determine the
1901 full pathname (if any) of the grep program. After Configure runs,
1902 the value is reset to a plain "grep" and is not useful.
1905 This variable contains a command that produces the text of the
1906 /etc/group file. This is normally "cat /etc/group", but can be
1907 "ypcat group" when NIS is used.
1908 On some systems, such as os390, there may be no equivalent
1909 command, in which case this variable is unset.
1911 groupstype (groupstype.U):
1912 This variable defines Groups_t to be something like gid_t, int,
1913 ushort, or whatever type is used for the second argument to
1914 getgroups() and setgroups(). Usually, this is the same as
1915 gidtype (gid_t), but sometimes it isn't.
1918 This variable is used internally by Configure to determine the
1919 full pathname (if any) of the gzip program. After Configure runs,
1920 the value is reset to a plain "gzip" and is not useful.
1922 h_fcntl (h_fcntl.U):
1923 This is variable gets set in various places to tell i_fcntl that
1924 <fcntl.h> should be included.
1926 h_sysfile (h_sysfile.U):
1927 This is variable gets set in various places to tell i_sys_file that
1928 <sys/file.h> should be included.
1931 Gives the type of hints used for previous answers. May be one of
1932 "default", "recommended" or "previous".
1935 This variable contains a command that produces the text of the
1936 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1937 "ypcat hosts" when NIS is used.
1938 On some systems, such as os390, there may be no equivalent
1939 command, in which case this variable is unset.
1942 This variable is the size of an I16 in bytes.
1945 This variable contains the C type used for Perl's I16.
1948 This variable is the size of an I32 in bytes.
1951 This variable contains the C type used for Perl's I32.
1954 This variable is the size of an I64 in bytes.
1957 This variable contains the C type used for Perl's I64.
1960 This variable is the size of an I8 in bytes.
1963 This variable contains the C type used for Perl's I8.
1965 i_arpainet (i_arpainet.U):
1966 This variable conditionally defines the I_ARPA_INET symbol,
1967 and indicates whether a C program should include <arpa/inet.h>.
1969 i_bsdioctl (i_sysioctl.U):
1970 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1971 indicates to the C program that <sys/bsdioctl.h> exists and should
1975 This variable conditionally defines the I_DB symbol, and indicates
1976 whether a C program may include Berkeley's DB include file <db.h>.
1979 This variable conditionally defines the I_DBM symbol, which
1980 indicates to the C program that <dbm.h> exists and should
1983 i_dirent (i_dirent.U):
1984 This variable conditionally defines I_DIRENT, which indicates
1985 to the C program that it should include <dirent.h>.
1988 This variable conditionally defines the I_DLD symbol, which
1989 indicates to the C program that <dld.h> (GNU dynamic loading)
1990 exists and should be included.
1992 i_dlfcn (i_dlfcn.U):
1993 This variable conditionally defines the I_DLFCN symbol, which
1994 indicates to the C program that <dlfcn.h> exists and should
1997 i_fcntl (i_fcntl.U):
1998 This variable controls the value of I_FCNTL (which tells
1999 the C program to include <fcntl.h>).
2001 i_float (i_float.U):
2002 This variable conditionally defines the I_FLOAT symbol, and indicates
2003 whether a C program may include <float.h> to get symbols like DBL_MAX
2004 or DBL_MIN, i.e. machine dependent floating point values.
2007 This variable conditionally defines the I_GDBM symbol, which
2008 indicates to the C program that <gdbm.h> exists and should
2012 This variable conditionally defines the I_GRP symbol, and indicates
2013 whether a C program should include <grp.h>.
2015 i_iconv (i_iconv.U):
2016 This variable conditionally defines the I_ICONV symbol, and indicates
2017 whether a C program should include <iconv.h>.
2019 i_ieeefp (i_ieeefp.U):
2020 This variable conditionally defines the I_IEEEFP symbol, and indicates
2021 whether a C program should include <ieeefp.h>.
2023 i_inttypes (i_inttypes.U):
2024 This variable conditionally defines the I_INTTYPES symbol,
2025 and indicates whether a C program should include <inttypes.h>.
2027 i_libutil (i_libutil.U):
2028 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2029 whether a C program should include <libutil.h>.
2031 i_limits (i_limits.U):
2032 This variable conditionally defines the I_LIMITS symbol, and indicates
2033 whether a C program may include <limits.h> to get symbols like WORD_BIT
2036 i_locale (i_locale.U):
2037 This variable conditionally defines the I_LOCALE symbol,
2038 and indicates whether a C program should include <locale.h>.
2040 i_machcthr (i_machcthr.U):
2041 This variable conditionally defines the I_MACH_CTHREADS symbol,
2042 and indicates whether a C program should include <mach/cthreads.h>.
2044 i_malloc (i_malloc.U):
2045 This variable conditionally defines the I_MALLOC symbol, and indicates
2046 whether a C program should include <malloc.h>.
2049 This variable conditionally defines the I_MATH symbol, and indicates
2050 whether a C program may include <math.h>.
2052 i_memory (i_memory.U):
2053 This variable conditionally defines the I_MEMORY symbol, and indicates
2054 whether a C program should include <memory.h>.
2056 i_mntent (i_mntent.U):
2057 This variable conditionally defines the I_MNTENT symbol, and indicates
2058 whether a C program should include <mntent.h>.
2061 This variable conditionally defines the I_NDBM symbol, which
2062 indicates to the C program that <ndbm.h> exists and should
2065 i_netdb (i_netdb.U):
2066 This variable conditionally defines the I_NETDB symbol, and indicates
2067 whether a C program should include <netdb.h>.
2069 i_neterrno (i_neterrno.U):
2070 This variable conditionally defines the I_NET_ERRNO symbol, which
2071 indicates to the C program that <net/errno.h> exists and should
2074 i_netinettcp (i_netinettcp.U):
2075 This variable conditionally defines the I_NETINET_TCP symbol,
2076 and indicates whether a C program should include <netinet/tcp.h>.
2079 This variable conditionally defines I_NETINET_IN, which indicates
2080 to the C program that it should include <netinet/in.h>. Otherwise,
2081 you may try <sys/in.h>.
2084 This variable conditionally defines the I_POLL symbol, and indicates
2085 whether a C program should include <poll.h>.
2088 This variable conditionally defines the I_PROT symbol, and indicates
2089 whether a C program should include <prot.h>.
2091 i_pthread (i_pthread.U):
2092 This variable conditionally defines the I_PTHREAD symbol,
2093 and indicates whether a C program should include <pthread.h>.
2096 This variable conditionally defines I_PWD, which indicates
2097 to the C program that it should include <pwd.h>.
2099 i_rpcsvcdbm (i_dbm.U):
2100 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2101 indicates to the C program that <rpcsvc/dbm.h> exists and should
2102 be included. Some System V systems might need this instead of <dbm.h>.
2105 This variable conditionally defines the I_SFIO symbol,
2106 and indicates whether a C program should include <sfio.h>.
2108 i_sgtty (i_termio.U):
2109 This variable conditionally defines the I_SGTTY symbol, which
2110 indicates to the C program that it should include <sgtty.h> rather
2113 i_shadow (i_shadow.U):
2114 This variable conditionally defines the I_SHADOW symbol, and indicates
2115 whether a C program should include <shadow.h>.
2117 i_socks (i_socks.U):
2118 This variable conditionally defines the I_SOCKS symbol, and indicates
2119 whether a C program should include <socks.h>.
2121 i_stdarg (i_varhdr.U):
2122 This variable conditionally defines the I_STDARG symbol, which
2123 indicates to the C program that <stdarg.h> exists and should
2126 i_stddef (i_stddef.U):
2127 This variable conditionally defines the I_STDDEF symbol, which
2128 indicates to the C program that <stddef.h> exists and should
2131 i_stdlib (i_stdlib.U):
2132 This variable conditionally defines the I_STDLIB symbol, which
2133 indicates to the C program that <stdlib.h> exists and should
2136 i_string (i_string.U):
2137 This variable conditionally defines the I_STRING symbol, which
2138 indicates that <string.h> should be included rather than <strings.h>.
2140 i_sunmath (i_sunmath.U):
2141 This variable conditionally defines the I_SUNMATH symbol, and indicates
2142 whether a C program should include <sunmath.h>.
2144 i_sysaccess (i_sysaccess.U):
2145 This variable conditionally defines the I_SYS_ACCESS symbol,
2146 and indicates whether a C program should include <sys/access.h>.
2148 i_sysdir (i_sysdir.U):
2149 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2150 whether a C program should include <sys/dir.h>.
2152 i_sysfile (i_sysfile.U):
2153 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2154 whether a C program should include <sys/file.h> to get R_OK and friends.
2156 i_sysfilio (i_sysioctl.U):
2157 This variable conditionally defines the I_SYS_FILIO symbol, which
2158 indicates to the C program that <sys/filio.h> exists and should
2159 be included in preference to <sys/ioctl.h>.
2162 This variable conditionally defines I_SYS_IN, which indicates
2163 to the C program that it should include <sys/in.h> instead of
2166 i_sysioctl (i_sysioctl.U):
2167 This variable conditionally defines the I_SYS_IOCTL symbol, which
2168 indicates to the C program that <sys/ioctl.h> exists and should
2171 i_syslog (i_syslog.U):
2172 This variable conditionally defines the I_SYSLOG symbol,
2173 and indicates whether a C program should include <syslog.h>.
2175 i_sysmman (i_sysmman.U):
2176 This variable conditionally defines the I_SYS_MMAN symbol, and
2177 indicates whether a C program should include <sys/mman.h>.
2179 i_sysmode (i_sysmode.U):
2180 This variable conditionally defines the I_SYSMODE symbol,
2181 and indicates whether a C program should include <sys/mode.h>.
2183 i_sysmount (i_sysmount.U):
2184 This variable conditionally defines the I_SYSMOUNT symbol,
2185 and indicates whether a C program should include <sys/mount.h>.
2187 i_sysndir (i_sysndir.U):
2188 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2189 whether a C program should include <sys/ndir.h>.
2191 i_sysparam (i_sysparam.U):
2192 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2193 whether a C program should include <sys/param.h>.
2195 i_sysresrc (i_sysresrc.U):
2196 This variable conditionally defines the I_SYS_RESOURCE symbol,
2197 and indicates whether a C program should include <sys/resource.h>.
2199 i_syssecrt (i_syssecrt.U):
2200 This variable conditionally defines the I_SYS_SECURITY symbol,
2201 and indicates whether a C program should include <sys/security.h>.
2203 i_sysselct (i_sysselct.U):
2204 This variable conditionally defines I_SYS_SELECT, which indicates
2205 to the C program that it should include <sys/select.h> in order to
2206 get the definition of struct timeval.
2208 i_syssockio (i_sysioctl.U):
2209 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2210 C program that socket ioctl codes may be found in <sys/sockio.h>
2211 instead of <sys/ioctl.h>.
2213 i_sysstat (i_sysstat.U):
2214 This variable conditionally defines the I_SYS_STAT symbol,
2215 and indicates whether a C program should include <sys/stat.h>.
2217 i_sysstatfs (i_sysstatfs.U):
2218 This variable conditionally defines the I_SYSSTATFS symbol,
2219 and indicates whether a C program should include <sys/statfs.h>.
2221 i_sysstatvfs (i_sysstatvfs.U):
2222 This variable conditionally defines the I_SYSSTATVFS symbol,
2223 and indicates whether a C program should include <sys/statvfs.h>.
2225 i_systime (i_time.U):
2226 This variable conditionally defines I_SYS_TIME, which indicates
2227 to the C program that it should include <sys/time.h>.
2229 i_systimek (i_time.U):
2230 This variable conditionally defines I_SYS_TIME_KERNEL, which
2231 indicates to the C program that it should include <sys/time.h>
2232 with KERNEL defined.
2234 i_systimes (i_systimes.U):
2235 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2236 whether a C program should include <sys/times.h>.
2238 i_systypes (i_systypes.U):
2239 This variable conditionally defines the I_SYS_TYPES symbol,
2240 and indicates whether a C program should include <sys/types.h>.
2242 i_sysuio (i_sysuio.U):
2243 This variable conditionally defines the I_SYSUIO symbol, and indicates
2244 whether a C program should include <sys/uio.h>.
2246 i_sysun (i_sysun.U):
2247 This variable conditionally defines I_SYS_UN, which indicates
2248 to the C program that it should include <sys/un.h> to get UNIX
2249 domain socket definitions.
2251 i_sysutsname (i_sysutsname.U):
2252 This variable conditionally defines the I_SYSUTSNAME symbol,
2253 and indicates whether a C program should include <sys/utsname.h>.
2255 i_sysvfs (i_sysvfs.U):
2256 This variable conditionally defines the I_SYSVFS symbol,
2257 and indicates whether a C program should include <sys/vfs.h>.
2259 i_syswait (i_syswait.U):
2260 This variable conditionally defines I_SYS_WAIT, which indicates
2261 to the C program that it should include <sys/wait.h>.
2263 i_termio (i_termio.U):
2264 This variable conditionally defines the I_TERMIO symbol, which
2265 indicates to the C program that it should include <termio.h> rather
2268 i_termios (i_termio.U):
2269 This variable conditionally defines the I_TERMIOS symbol, which
2270 indicates to the C program that the POSIX <termios.h> file is
2274 This variable conditionally defines I_TIME, which indicates
2275 to the C program that it should include <time.h>.
2277 i_unistd (i_unistd.U):
2278 This variable conditionally defines the I_UNISTD symbol, and indicates
2279 whether a C program should include <unistd.h>.
2281 i_ustat (i_ustat.U):
2282 This variable conditionally defines the I_USTAT symbol, and indicates
2283 whether a C program should include <ustat.h>.
2285 i_utime (i_utime.U):
2286 This variable conditionally defines the I_UTIME symbol, and indicates
2287 whether a C program should include <utime.h>.
2289 i_values (i_values.U):
2290 This variable conditionally defines the I_VALUES symbol, and indicates
2291 whether a C program may include <values.h> to get symbols like MAXLONG
2294 i_varargs (i_varhdr.U):
2295 This variable conditionally defines I_VARARGS, which indicates
2296 to the C program that it should include <varargs.h>.
2298 i_varhdr (i_varhdr.U):
2299 Contains the name of the header to be included to get va_dcl definition.
2300 Typically one of varargs.h or stdarg.h.
2302 i_vfork (i_vfork.U):
2303 This variable conditionally defines the I_VFORK symbol, and indicates
2304 whether a C program should include vfork.h.
2306 ignore_versioned_solibs (libs.U):
2307 This variable should be non-empty if non-versioned shared
2308 libraries (libfoo.so.x.y) are to be ignored (because they
2309 cannot be linked against).
2311 inc_version_list (inc_version_list.U):
2312 This variable specifies the list of subdirectories in over
2313 which perl.c:incpush() and lib/lib.pm will automatically
2314 search when adding directories to @INC. The elements in
2315 the list are separated by spaces. This is only useful
2316 if you have a perl library directory tree structured like the
2317 default one. See INSTALL for how this works. The versioned
2318 site_perl directory was introduced in 5.005, so that is the
2319 lowest possible value.
2321 inc_version_list_init (inc_version_list.U):
2322 This variable holds the same list as inc_version_list, but
2323 each item is enclosed in double quotes and separated by commas,
2324 suitable for use in the PERL_INC_VERSION_LIST initialization.
2327 This variable must preceed the normal include path to get hte
2328 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2329 Value can be "" or "/bsd43" on mips.
2332 This variable is defined but not used by Configure.
2333 The value is a plain '' and is not useful.
2335 installarchlib (archlib.U):
2336 This variable is really the same as archlibexp but may differ on
2337 those systems using AFS. For extra portability, only this variable
2338 should be used in makefiles.
2341 This variable is the same as binexp unless AFS is running in which case
2342 the user is explicitely prompted for it. This variable should always
2343 be used in your makefiles for maximum portability.
2345 installman1dir (man1dir.U):
2346 This variable is really the same as man1direxp, unless you are using
2347 AFS in which case it points to the read/write location whereas
2348 man1direxp only points to the read-only access location. For extra
2349 portability, you should only use this variable within your makefiles.
2351 installman3dir (man3dir.U):
2352 This variable is really the same as man3direxp, unless you are using
2353 AFS in which case it points to the read/write location whereas
2354 man3direxp only points to the read-only access location. For extra
2355 portability, you should only use this variable within your makefiles.
2357 installprefix (installprefix.U):
2358 This variable holds the name of the directory below which
2359 "make install" will install the package. For most users, this
2360 is the same as prefix. However, it is useful for
2361 installing the software into a different (usually temporary)
2362 location after which it can be bundled up and moved somehow
2363 to the final location specified by prefix.
2365 installprefixexp (installprefix.U):
2366 This variable holds the full absolute path of installprefix
2367 with all ~-expansion done.
2369 installprivlib (privlib.U):
2370 This variable is really the same as privlibexp but may differ on
2371 those systems using AFS. For extra portability, only this variable
2372 should be used in makefiles.
2374 installscript (scriptdir.U):
2375 This variable is usually the same as scriptdirexp, unless you are on
2376 a system running AFS, in which case they may differ slightly. You
2377 should always use this variable within your makefiles for portability.
2379 installsitearch (sitearch.U):
2380 This variable is really the same as sitearchexp but may differ on
2381 those systems using AFS. For extra portability, only this variable
2382 should be used in makefiles.
2384 installsitebin (sitebin.U):
2385 This variable is usually the same as sitebinexp, unless you are on
2386 a system running AFS, in which case they may differ slightly. You
2387 should always use this variable within your makefiles for portability.
2389 installsitelib (sitelib.U):
2390 This variable is really the same as sitelibexp but may differ on
2391 those systems using AFS. For extra portability, only this variable
2392 should be used in makefiles.
2394 installstyle (installstyle.U):
2395 This variable describes the "style" of the perl installation.
2396 This is intended to be useful for tools that need to
2397 manipulate entire perl distributions. Perl itself doesn't use
2398 this to find its libraries -- the library directories are
2399 stored directly in Config.pm. Currently, there are only two
2400 styles: "lib" and "lib/perl5". The default library locations
2401 (e.g. privlib, sitelib) are either $prefix/lib or
2402 $prefix/lib/perl5. The former is useful if $prefix is a
2403 directory dedicated to perl (e.g. /opt/perl), while the latter
2404 is useful if $prefix is shared by many packages, e.g. if
2406 This may later be extended to include other information, so
2407 be careful with pattern-matching on the results.
2408 For compatibility with perl5.005 and earlier, the default
2409 setting is based on whether or not $prefix contains the string
2412 installusrbinperl (instubperl.U):
2413 This variable tells whether Perl should be installed also as
2414 /usr/bin/perl in addition to
2417 installvendorarch (vendorarch.U):
2418 This variable is really the same as vendorarchexp but may differ on
2419 those systems using AFS. For extra portability, only this variable
2420 should be used in makefiles.
2422 installvendorbin (vendorbin.U):
2423 This variable is really the same as vendorbinexp but may differ on
2424 those systems using AFS. For extra portability, only this variable
2425 should be used in makefiles.
2427 installvendorlib (vendorlib.U):
2428 This variable is really the same as vendorlibexp but may differ on
2429 those systems using AFS. For extra portability, only this variable
2430 should be used in makefiles.
2432 intsize (intsize.U):
2433 This variable contains the value of the INTSIZE symbol, which
2434 indicates to the C program how many bytes there are in an int.
2436 ivdformat (perlxvf.U):
2437 This variable contains the format string used for printing
2438 a Perl IV as a signed decimal integer.
2441 This variable is the size of an IV in bytes.
2444 This variable contains the C type used for Perl's IV.
2446 known_extensions (Extensions.U):
2447 This variable holds a list of all XS extensions included in
2451 This variable is defined but not used by Configure.
2452 The value is a plain '' and is not useful.
2455 This variable indicates the program to be used to link
2456 libraries for dynamic loading. On some systems, it is 'ld'.
2457 On ELF systems, it should be $cc. Mostly, we'll try to respect
2458 the hint file setting.
2460 lddlflags (dlsrc.U):
2461 This variable contains any special flags that might need to be
2462 passed to $ld to create a shared library suitable for dynamic
2463 loading. It is up to the makefile to use it. For hpux, it
2464 should be '-b'. For sunos 4.1, it is empty.
2466 ldflags (ccflags.U):
2467 This variable contains any additional C loader flags desired by
2468 the user. It is up to the Makefile to use this.
2470 ldflags_uselargefiles (uselfs.U):
2471 This variable contains the loader flags needed by large file builds
2472 and added to ldflags by hints files.
2474 ldlibpthname (libperl.U):
2475 This variable holds the name of the shared library
2476 search path, often LD_LIBRARY_PATH. To get an empty
2477 string, the hints file must set this to 'none'.
2480 This variable is used internally by Configure to determine the
2481 full pathname (if any) of the less program. After Configure runs,
2482 the value is reset to a plain "less" and is not useful.
2485 This is an old synonym for _a.
2488 This variable contains the location of the C library.
2490 libperl (libperl.U):
2491 The perl executable is obtained by linking perlmain.c with
2492 libperl, any static extensions (usually just DynaLoader),
2493 and any other libraries needed on this system. libperl
2494 is usually libperl.a, but can also be libperl.so.xxx if
2495 the user wishes to build a perl executable with a shared
2499 This variable holds the general path (space-separated) used to find
2500 libraries. It is intended to be used by other units.
2503 This variable holds the additional libraries we want to use.
2504 It is up to the Makefile to deal with it.
2507 This variable holds the directory names aka dirnames of the libraries
2508 we found and accepted, duplicates are removed.
2511 This variable holds the filenames aka basenames of the libraries
2512 we found and accepted.
2515 This variable holds the full pathnames of the libraries
2516 we found and accepted.
2519 This variable holds the directory names probed for libraries.
2521 libswanted (Myinit.U):
2522 This variable holds a list of all the libraries we want to
2523 search. The order is chosen to pick up the c library
2524 ahead of ucb or bsd libraries for SVR4.
2526 libswanted_uselargefiles (uselfs.U):
2527 This variable contains the libraries needed by large file builds
2528 and added to ldflags by hints files. It is a space separated list
2529 of the library names without the "lib" prefix or any suffix, just
2533 This variable is defined but not used by Configure.
2534 The value is a plain '' and is not useful.
2537 This variable is defined but not used by Configure.
2538 The value is a plain '' and is not useful.
2540 lkflags (ccflags.U):
2541 This variable contains any additional C partial linker flags desired by
2542 the user. It is up to the Makefile to use this.
2545 This variable is used internally by Configure to determine the
2546 full pathname (if any) of the ln program. After Configure runs,
2547 the value is reset to a plain "ln" and is not useful.
2550 This variable holds the name of the command to make
2551 symbolic links (if they are supported). It can be used
2552 in the Makefile. It is either 'ln -s' or 'ln'
2554 locincpth (ccflags.U):
2555 This variable contains a list of additional directories to be
2556 searched by the compiler. The appropriate '-I' directives will
2557 be added to ccflags. This is intended to simplify setting
2558 local directories from the Configure command line.
2559 It's not much, but it parallels the loclibpth stuff in libpth.U.
2561 loclibpth (libpth.U):
2562 This variable holds the paths (space-separated) used to find local
2563 libraries. It is prepended to libpth, and is intended to be easily
2564 set from the command line.
2566 longdblsize (d_longdbl.U):
2567 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2568 indicates to the C program how many bytes there are in a long double,
2569 if this system supports long doubles.
2571 longlongsize (d_longlong.U):
2572 This variable contains the value of the LONGLONGSIZE symbol, which
2573 indicates to the C program how many bytes there are in a long long,
2574 if this system supports long long.
2576 longsize (intsize.U):
2577 This variable contains the value of the LONGSIZE symbol, which
2578 indicates to the C program how many bytes there are in a long.
2581 This variable is defined but not used by Configure.
2582 The value is a plain '' and is not useful.
2585 This variable is defined but not used by Configure.
2586 The value is a plain '' and is not useful.
2589 This variable is used internally by Configure to determine the
2590 full pathname (if any) of the ls program. After Configure runs,
2591 the value is reset to a plain "ls" and is not useful.
2593 lseeksize (lseektype.U):
2594 This variable defines lseektype to be something like off_t, long,
2595 or whatever type is used to declare lseek offset's type in the
2596 kernel (which also appears to be lseek's return type).
2598 lseektype (lseektype.U):
2599 This variable defines lseektype to be something like off_t, long,
2600 or whatever type is used to declare lseek offset's type in the
2601 kernel (which also appears to be lseek's return type).
2604 This variable is defined but not used by Configure.
2605 The value is a plain '' and is not useful.
2608 This variable is defined but not used by Configure.
2609 The value is a plain '' and is not useful.
2612 This variable is used internally by Configure to determine the
2613 full pathname (if any) of the make program. After Configure runs,
2614 the value is reset to a plain "make" and is not useful.
2616 make_set_make (make.U):
2617 Some versions of 'make' set the variable MAKE. Others do not.
2618 This variable contains the string to be included in Makefile.SH
2619 so that MAKE is set if needed, and not if not needed.
2620 Possible values are:
2621 make_set_make='#' # If your make program handles this for you,
2622 make_set_make="MAKE=$make" # if it doesn't.
2623 I used a comment character so that we can distinguish a
2624 'set' value (from a previous config.sh or Configure '-D' option)
2625 from an uncomputed value.
2627 mallocobj (mallocsrc.U):
2628 This variable contains the name of the malloc.o that this package
2629 generates, if that malloc.o is preferred over the system malloc.
2630 Otherwise the value is null. This variable is intended for generating
2631 Makefiles. See mallocsrc.
2633 mallocsrc (mallocsrc.U):
2634 This variable contains the name of the malloc.c that comes with
2635 the package, if that malloc.c is preferred over the system malloc.
2636 Otherwise the value is null. This variable is intended for generating
2639 malloctype (mallocsrc.U):
2640 This variable contains the kind of ptr returned by malloc and realloc.
2642 man1dir (man1dir.U):
2643 This variable contains the name of the directory in which manual
2644 source pages are to be put. It is the responsibility of the
2645 Makefile.SH to get the value of this into the proper command.
2646 You must be prepared to do the ~name expansion yourself.
2648 man1direxp (man1dir.U):
2649 This variable is the same as the man1dir variable, but is filename
2650 expanded at configuration time, for convenient use in makefiles.
2652 man1ext (man1dir.U):
2653 This variable contains the extension that the manual page should
2654 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2657 man3dir (man3dir.U):
2658 This variable contains the name of the directory in which manual
2659 source pages are to be put. It is the responsibility of the
2660 Makefile.SH to get the value of this into the proper command.
2661 You must be prepared to do the ~name expansion yourself.
2663 man3direxp (man3dir.U):
2664 This variable is the same as the man3dir variable, but is filename
2665 expanded at configuration time, for convenient use in makefiles.
2667 man3ext (man3dir.U):
2668 This variable contains the extension that the manual page should
2669 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2673 This variable is used internally by Configure to determine the
2674 full pathname (if any) of the Mcc program. After Configure runs,
2675 the value is reset to a plain "Mcc" and is not useful.
2677 mips_type (usrinc.U):
2678 This variable holds the environment type for the mips system.
2679 Possible values are "BSD 4.3" and "System V".
2682 This variable is used internally by Configure to determine the
2683 full pathname (if any) of the mkdir program. After Configure runs,
2684 the value is reset to a plain "mkdir" and is not useful.
2686 mmaptype (d_mmap.U):
2687 This symbol contains the type of pointer returned by mmap()
2688 (and simultaneously the type of the first argument).
2689 It can be 'void *' or 'caddr_t'.
2691 modetype (modetype.U):
2692 This variable defines modetype to be something like mode_t,
2693 int, unsigned short, or whatever type is used to declare file
2694 modes for system calls.
2697 This variable is used internally by Configure to determine the
2698 full pathname (if any) of the more program. After Configure runs,
2699 the value is reset to a plain "more" and is not useful.
2701 multiarch (multiarch.U):
2702 This variable conditionally defines the MULTIARCH symbol
2703 which signifies the presence of multiplatform files.
2704 This is normally set by hints files.
2707 This variable is defined but not used by Configure.
2708 The value is a plain '' and is not useful.
2710 myarchname (archname.U):
2711 This variable holds the architecture name computed by Configure in
2712 a previous run. It is not intended to be perused by any user and
2713 should never be set in a hint file.
2715 mydomain (myhostname.U):
2716 This variable contains the eventual value of the MYDOMAIN symbol,
2717 which is the domain of the host the program is going to run on.
2718 The domain must be appended to myhostname to form a complete host name.
2719 The dot comes with mydomain, and need not be supplied by the program.
2721 myhostname (myhostname.U):
2722 This variable contains the eventual value of the MYHOSTNAME symbol,
2723 which is the name of the host the program is going to run on.
2724 The domain is not kept with hostname, but must be gotten from mydomain.
2725 The dot comes with mydomain, and need not be supplied by the program.
2727 myuname (Oldconfig.U):
2728 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2729 pseudo variables assignments in the output are stripped, thank you. The
2730 whole thing is then lower-cased.
2733 This variable contains the '-n' flag if that is what causes the echo
2734 command to suppress newline. Otherwise it is null. Correct usage is
2735 $echo $n "prompt for a question: $c".
2737 netdb_hlen_type (netdbtype.U):
2738 This variable holds the type used for the 2nd argument to
2739 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2740 This is only useful if you have gethostbyaddr(), naturally.
2742 netdb_host_type (netdbtype.U):
2743 This variable holds the type used for the 1st argument to
2744 gethostbyaddr(). Usually, this is char * or void *, possibly
2745 with or without a const prefix.
2746 This is only useful if you have gethostbyaddr(), naturally.
2748 netdb_name_type (netdbtype.U):
2749 This variable holds the type used for the argument to
2750 gethostbyname(). Usually, this is char * or const char *.
2751 This is only useful if you have gethostbyname(), naturally.
2753 netdb_net_type (netdbtype.U):
2754 This variable holds the type used for the 1st argument to
2755 getnetbyaddr(). Usually, this is int or long.
2756 This is only useful if you have getnetbyaddr(), naturally.
2759 This variable is used internally by Configure to determine the
2760 full pathname (if any) of the nm program. After Configure runs,
2761 the value is reset to a plain "nm" and is not useful.
2764 This variable holds the options that may be necessary for nm.
2766 nm_so_opt (usenm.U):
2767 This variable holds the options that may be necessary for nm
2768 to work on a shared library but that can not be used on an
2769 archive library. Currently, this is only used by Linux, where
2770 nm --dynamic is *required* to get symbols from an ELF library which
2771 has been stripped, but nm --dynamic is *fatal* on an archive library.
2772 Maybe Linux should just always set usenm=false.
2774 nonxs_ext (Extensions.U):
2775 This variable holds a list of all non-xs extensions included
2776 in the package. All of them will be built.
2779 This variable is used internally by Configure to determine the
2780 full pathname (if any) of the nroff program. After Configure runs,
2781 the value is reset to a plain "nroff" and is not useful.
2783 nveformat (perlxvf.U):
2784 This variable contains the format string used for printing
2785 a Perl NV using %e-ish floating point format.
2787 nvEUformat (perlxvf.U):
2788 This variable contains the format string used for printing
2789 a Perl NV using %E-ish floating point format.
2791 nvfformat (perlxvf.U):
2792 This variable confains the format string used for printing
2793 a Perl NV using %f-ish floating point format.
2795 nvFUformat (perlxvf.U):
2796 This variable confains the format string used for printing
2797 a Perl NV using %F-ish floating point format.
2799 nvgformat (perlxvf.U):
2800 This variable contains the format string used for printing
2801 a Perl NV using %g-ish floating point format.
2803 nvGUformat (perlxvf.U):
2804 This variable contains the format string used for printing
2805 a Perl NV using %G-ish floating point format.
2808 This variable is the size of an NV in bytes.
2811 This variable contains the C type used for Perl's NV.
2813 o_nonblock (nblock_io.U):
2814 This variable bears the symbol value to be used during open() or fcntl()
2815 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2816 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2817 but that is only supported by some devices.
2820 This is an old synonym for _o.
2822 old_pthread_create_joinable (d_pthrattrj.U):
2823 This variable defines the constant to use for creating joinable
2824 (aka undetached) pthreads. Unused if pthread.h defines
2825 PTHREAD_CREATE_JOINABLE. If used, possible values are
2826 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2828 optimize (ccflags.U):
2829 This variable contains any optimizer/debugger flag that should be used.
2830 It is up to the Makefile to use it.
2832 orderlib (orderlib.U):
2833 This variable is "true" if the components of libraries must be ordered
2834 (with `lorder $* | tsort`) before placing them in an archive. Set to
2835 "false" if ranlib or ar can generate random libraries.
2837 osname (Oldconfig.U):
2838 This variable contains the operating system name (e.g. sunos,
2839 solaris, hpux, etc.). It can be useful later on for setting
2840 defaults. Any spaces are replaced with underscores. It is set
2841 to a null string if we can't figure it out.
2843 osvers (Oldconfig.U):
2844 This variable contains the operating system version (e.g.
2845 4.1.3, 5.2, etc.). It is primarily used for helping select
2846 an appropriate hints file, but might be useful elsewhere for
2847 setting defaults. It is set to '' if we can't figure it out.
2848 We try to be flexible about how much of the version number
2849 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2850 same for this package, hints files might just be os_4.0 or
2851 os_4.1, etc., not keeping separate files for each little release.
2853 otherlibdirs (otherlibdirs.U):
2854 This variable contains a colon-separated set of paths for the perl
2855 binary to search for additional library files or modules.
2856 These directories will be tacked to the end of @INC.
2857 Perl will automatically search below each path for version-
2858 and architecture-specific directories. See inc_version_list
2860 A value of ' ' means 'none' and is used to preserve this value
2861 for the next run through Configure.
2863 package (package.U):
2864 This variable contains the name of the package being constructed.
2865 It is primarily intended for the use of later Configure units.
2868 This variable contains the name of the preferred pager on the system.
2869 Usual values are (the full pathnames of) more, less, pg, or cat.
2872 This variable contains a command that produces the text of the
2873 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2874 "ypcat passwd" when NIS is used.
2875 On some systems, such as os390, there may be no equivalent
2876 command, in which case this variable is unset.
2878 patchlevel (patchlevel.U):
2879 The patchlevel level of this package.
2880 The value of patchlevel comes from the patchlevel.h file.
2881 In a version number such as 5.6.1, this is the "6".
2882 In patchlevel.h, this is referred to as "PERL_VERSION".
2885 This is an old synonym for p_ in Head.U, the character
2886 used to separate elements in the command shell search PATH.
2889 This variable contains the full path (if any) to a previously
2890 installed perl5.005 or later suitable for running the script
2891 to determine inc_version_list.
2894 This variable is defined but not used by Configure.
2895 The value is a plain '' and is not useful.
2897 PERL_REVISION (Oldsyms.U):
2898 In a Perl version number such as 5.6.2, this is the 5.
2899 This value is manually set in patchlevel.h
2901 PERL_SUBVERSION (Oldsyms.U):
2902 In a Perl version number such as 5.6.2, this is the 2.
2903 Values greater than 50 represent potentially unstable
2904 development subversions.
2905 This value is manually set in patchlevel.h
2907 PERL_VERSION (Oldsyms.U):
2908 In a Perl version number such as 5.6.2, this is the 6.
2909 This value is manually set in patchlevel.h
2911 perladmin (perladmin.U):
2912 Electronic mail address of the perl5 administrator.
2915 The list of libraries needed by Perl only (any libraries needed
2916 by extensions only will by dropped, if using dynamic loading).
2918 perlpath (perlpath.U):
2919 This variable contains the eventual value of the PERLPATH symbol,
2920 which contains the name of the perl interpreter to be used in
2921 shell scripts and in the "eval 'exec'" idiom.
2924 This variable is used internally by Configure to determine the
2925 full pathname (if any) of the pg program. After Configure runs,
2926 the value is reset to a plain "pg" and is not useful.
2928 phostname (myhostname.U):
2929 This variable contains the eventual value of the PHOSTNAME symbol,
2930 which is a command that can be fed to popen() to get the host name.
2931 The program should probably not presume that the domain is or isn't
2934 pidtype (pidtype.U):
2935 This variable defines PIDTYPE to be something like pid_t, int,
2936 ushort, or whatever type is used to declare process ids in the kernel.
2939 Holds the private path used by Configure to find out the libraries.
2940 Its value is prepend to libpth. This variable takes care of special
2941 machines, like the mips. Usually, it should be empty.
2943 pm_apiversion (xs_apiversion.U):
2944 This variable contains the version of the oldest perl
2945 compatible with the present perl. (That is, pure perl modules
2946 written for $pm_apiversion will still work for the current
2947 version). perl.c:incpush() and lib/lib.pm will automatically
2948 search in $sitelib for older directories across major versions
2949 back to pm_apiversion. This is only useful if you have a perl
2950 library directory tree structured like the default one. The
2951 versioned site_perl library was introduced in 5.005, so that's
2952 the default setting for this variable. It's hard to imagine
2953 it changing before Perl6. It is included here for symmetry
2954 with xs_apiveprsion -- the searching algorithms will
2955 (presumably) be similar.
2956 See the INSTALL file for how this works.
2959 This variable is defined but not used by Configure.
2960 The value is a plain '' and is not useful.
2963 This variable is defined but not used by Configure.
2964 The value is a plain '' and is not useful.
2967 This variable holds the name of the directory below which the
2968 user will install the package. Usually, this is /usr/local, and
2969 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2970 man pages in /usr/local/man, etc. It is only used to set defaults
2971 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2973 prefixexp (prefix.U):
2974 This variable holds the full absolute path of the directory below
2975 which the user will install the package. Derived from prefix.
2977 privlib (privlib.U):
2978 This variable contains the eventual value of the PRIVLIB symbol,
2979 which is the name of the private library for this package. It may
2980 have a ~ on the front. It is up to the makefile to eventually create
2981 this directory while performing installation (with ~ substitution).
2983 privlibexp (privlib.U):
2984 This variable is the ~name expanded version of privlib, so that you
2985 may use it directly in Makefiles or shell scripts.
2987 prototype (prototype.U):
2988 This variable holds the eventual value of CAN_PROTOTYPE, which
2989 indicates the C compiler can handle funciton prototypes.
2991 ptrsize (ptrsize.U):
2992 This variable contains the value of the PTRSIZE symbol, which
2993 indicates to the C program how many bytes there are in a pointer.
2995 quadkind (quadtype.U):
2996 This variable, if defined, encodes the type of a quad:
2997 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2999 quadtype (quadtype.U):
3000 This variable defines Quad_t to be something like long, int,
3001 long long, int64_t, or whatever type is used for 64-bit integers.
3003 randbits (randfunc.U):
3004 Indicates how many bits are produced by the function used to
3005 generate normalized random numbers.
3007 randfunc (randfunc.U):
3008 Indicates the name of the random number function to use.
3009 Values include drand48, random, and rand. In C programs,
3010 the 'Drand01' macro is defined to generate uniformly distributed
3011 random numbers over the range [0., 1.[ (see drand01 and nrand).
3013 randseedtype (randfunc.U):
3014 Indicates the type of the argument of the seedfunc.
3016 ranlib (orderlib.U):
3017 This variable is set to the pathname of the ranlib program, if it is
3018 needed to generate random libraries. Set to ":" if ar can generate
3019 random libraries or if random libraries are not supported
3021 rd_nodata (nblock_io.U):
3022 This variable holds the return code from read() when no data is
3023 present. It should be -1, but some systems return 0 when O_NDELAY is
3024 used, which is a shame because you cannot make the difference between
3025 no data and an EOF.. Sigh!
3027 revision (patchlevel.U):
3028 The value of revision comes from the patchlevel.h file.
3029 In a version number such as 5.6.1, this is the "5".
3030 In patchlevel.h, this is referred to as "PERL_REVISION".
3033 This variable is used internally by Configure to determine the
3034 full pathname (if any) of the rm program. After Configure runs,
3035 the value is reset to a plain "rm" and is not useful.
3038 This variable is defined but not used by Configure.
3039 The value is a plain '' and is not useful.
3042 This variable contains 'true' or 'false' depending whether the
3043 nm extraction should be performed or not, according to the value
3044 of usenm and the flags on the Configure command line.
3046 sched_yield (d_pthread_y.U):
3047 This variable defines the way to yield the execution
3048 of the current thread.
3050 scriptdir (scriptdir.U):
3051 This variable holds the name of the directory in which the user wants
3052 to put publicly scripts for the package in question. It is either
3053 the same directory as for binaries, or a special one that can be
3054 mounted across different architectures, like /usr/share. Programs
3055 must be prepared to deal with ~name expansion.
3057 scriptdirexp (scriptdir.U):
3058 This variable is the same as scriptdir, but is filename expanded
3059 at configuration time, for programs not wanting to bother with it.
3062 This variable is used internally by Configure to determine the
3063 full pathname (if any) of the sed program. After Configure runs,
3064 the value is reset to a plain "sed" and is not useful.
3066 seedfunc (randfunc.U):
3067 Indicates the random number generating seed function.
3068 Values include srand48, srandom, and srand.
3070 selectminbits (selectminbits.U):
3071 This variable holds the minimum number of bits operated by select.
3072 That is, if you do select(n, ...), how many bits at least will be
3073 cleared in the masks if some activity is detected. Usually this
3074 is either n or 32*ceil(n/32), especially many little-endians do
3075 the latter. This is only useful if you have select(), naturally.
3077 selecttype (selecttype.U):
3078 This variable holds the type used for the 2nd, 3rd, and 4th
3079 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3080 is defined, and 'int *' otherwise. This is only useful if you
3081 have select(), naturally.
3084 This variable is defined but not used by Configure.
3085 The value is a plain '' and is not useful.
3088 This variable contains the full pathname of the shell used
3089 on this system to execute Bourne shell scripts. Usually, this will be
3090 /bin/sh, though it's possible that some systems will have /bin/ksh,
3091 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3093 This unit comes before Options.U, so you can't set sh with a '-D'
3094 option, though you can override this (and startsh)
3095 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3098 This variable is defined but not used by Configure.
3099 The value is a plain '' and is not useful.
3101 sharpbang (spitshell.U):
3102 This variable contains the string #! if this system supports that
3105 shmattype (d_shmat.U):
3106 This symbol contains the type of pointer returned by shmat().
3107 It can be 'void *' or 'char *'.
3109 shortsize (intsize.U):
3110 This variable contains the value of the SHORTSIZE symbol which
3111 indicates to the C program how many bytes there are in a short.
3113 shrpenv (libperl.U):
3114 If the user builds a shared libperl.so, then we need to tell the
3115 'perl' executable where it will be able to find the installed libperl.so.
3116 One way to do this on some systems is to set the environment variable
3117 LD_RUN_PATH to the directory that will be the final location of the
3118 shared libperl.so. The makefile can use this with something like
3119 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3121 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3124 See the main perl Makefile.SH for actual working usage.
3125 Alternatively, we might be able to use a command line option such
3126 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3127 $archlibexp/CORE (Linux).
3129 shsharp (spitshell.U):
3130 This variable tells further Configure units whether your sh can
3133 sig_count (sig_name.U):
3134 This variable holds a number larger than the largest valid
3135 signal number. This is usually the same as the NSIG macro.
3137 sig_name (sig_name.U):
3138 This variable holds the signal names, space separated. The leading
3139 SIG in signal name is removed. A ZERO is prepended to the
3140 list. This is currently not used.
3142 sig_name_init (sig_name.U):
3143 This variable holds the signal names, enclosed in double quotes and
3144 separated by commas, suitable for use in the SIG_NAME definition
3145 below. A "ZERO" is prepended to the list, and the list is
3146 terminated with a plain 0. The leading SIG in signal names
3147 is removed. See sig_num.
3149 sig_num (sig_name.U):
3150 This variable holds the signal numbers, space separated. A ZERO is
3151 prepended to the list (corresponding to the fake SIGZERO), and
3152 the list is terminated with a 0. Those numbers correspond to
3153 the value of the signal listed in the same place within the
3156 sig_num_init (sig_name.U):
3157 This variable holds the signal numbers, enclosed in double quotes and
3158 separated by commas, suitable for use in the SIG_NUM definition
3159 below. A "ZERO" is prepended to the list, and the list is
3160 terminated with a plain 0.
3162 signal_t (d_voidsig.U):
3163 This variable holds the type of the signal handler (void or int).
3165 sitearch (sitearch.U):
3166 This variable contains the eventual value of the SITEARCH symbol,
3167 which is the name of the private library for this package. It may
3168 have a ~ on the front. It is up to the makefile to eventually create
3169 this directory while performing installation (with ~ substitution).
3170 The standard distribution will put nothing in this directory.
3171 After perl has been installed, users may install their own local
3172 architecture-dependent modules in this directory with
3173 MakeMaker Makefile.PL
3174 or equivalent. See INSTALL for details.
3176 sitearchexp (sitearch.U):
3177 This variable is the ~name expanded version of sitearch, so that you
3178 may use it directly in Makefiles or shell scripts.
3180 sitebin (sitebin.U):
3181 This variable holds the name of the directory in which the user wants
3182 to put add-on publicly executable files for the package in question. It
3183 is most often a local directory such as /usr/local/bin. Programs using
3184 this variable must be prepared to deal with ~name substitution.
3185 The standard distribution will put nothing in this directory.
3186 After perl has been installed, users may install their own local
3187 executables in this directory with
3188 MakeMaker Makefile.PL
3189 or equivalent. See INSTALL for details.
3191 sitebinexp (sitebin.U):
3192 This is the same as the sitebin variable, but is filename expanded at
3193 configuration time, for use in your makefiles.
3195 sitelib (sitelib.U):
3196 This variable contains the eventual value of the SITELIB symbol,
3197 which is the name of the private library for this package. It may
3198 have a ~ on the front. It is up to the makefile to eventually create
3199 this directory while performing installation (with ~ substitution).
3200 The standard distribution will put nothing in this directory.
3201 After perl has been installed, users may install their own local
3202 architecture-independent modules in this directory with
3203 MakeMaker Makefile.PL
3204 or equivalent. See INSTALL for details.
3206 sitelib_stem (sitelib.U):
3207 This variable is $sitelibexp with any trailing version-specific component
3208 removed. The elements in inc_version_list (inc_version_list.U) can
3209 be tacked onto this variable to generate a list of directories to search.
3211 sitelibexp (sitelib.U):
3212 This variable is the ~name expanded version of sitelib, so that you
3213 may use it directly in Makefiles or shell scripts.
3215 siteprefix (siteprefix.U):
3216 This variable holds the full absolute path of the directory below
3217 which the user will install add-on packages.
3218 See INSTALL for usage and examples.
3220 siteprefixexp (siteprefix.U):
3221 This variable holds the full absolute path of the directory below
3222 which the user will install add-on packages. Derived from siteprefix.
3224 sizesize (sizesize.U):
3225 This variable contains the size of a sizetype in bytes.
3227 sizetype (sizetype.U):
3228 This variable defines sizetype to be something like size_t,
3229 unsigned long, or whatever type is used to declare length
3230 parameters for string functions.
3233 This variable is defined but not used by Configure.
3234 The value is a plain '' and is not useful.
3237 This variable is defined but not used by Configure.
3238 The value is a plain '' and is not useful.
3241 This variable holds the extension used to identify shared libraries
3242 (also known as shared objects) on the system. Usually set to 'so'.
3244 sockethdr (d_socket.U):
3245 This variable has any cpp '-I' flags needed for socket support.
3247 socketlib (d_socket.U):
3248 This variable has the names of any libraries needed for socket support.
3250 socksizetype (socksizetype.U):
3251 This variable holds the type used for the size argument
3252 for various socket calls like accept. Usual values include
3253 socklen_t, size_t, and int.
3256 This variable is used internally by Configure to determine the
3257 full pathname (if any) of the sort program. After Configure runs,
3258 the value is reset to a plain "sort" and is not useful.
3260 spackage (package.U):
3261 This variable contains the name of the package being constructed,
3262 with the first letter uppercased, i.e. suitable for starting
3265 spitshell (spitshell.U):
3266 This variable contains the command necessary to spit out a runnable
3267 shell on this system. It is either cat or a grep '-v' for # comments.
3269 sPRId64 (quadfio.U):
3270 This variable, if defined, contains the string used by stdio to
3271 format 64-bit decimal numbers (format 'd') for output.
3273 sPRIeldbl (longdblfio.U):
3274 This variable, if defined, contains the string used by stdio to
3275 format long doubles (format 'e') for output.
3277 sPRIEUldbl (longdblfio.U):
3278 This variable, if defined, contains the string used by stdio to
3279 format long doubles (format 'E') for output.
3280 The 'U' in the name is to separate this from sPRIeldbl so that even
3281 case-blind systems can see the difference.
3283 sPRIfldbl (longdblfio.U):
3284 This variable, if defined, contains the string used by stdio to
3285 format long doubles (format 'f') for output.
3287 sPRIFUldbl (longdblfio.U):
3288 This variable, if defined, contains the string used by stdio to
3289 format long doubles (format 'F') for output.
3290 The 'U' in the name is to separate this from sPRIfldbl so that even
3291 case-blind systems can see the difference.
3293 sPRIgldbl (longdblfio.U):
3294 This variable, if defined, contains the string used by stdio to
3295 format long doubles (format 'g') for output.
3297 sPRIGUldbl (longdblfio.U):
3298 This variable, if defined, contains the string used by stdio to
3299 format long doubles (format 'G') for output.
3300 The 'U' in the name is to separate this from sPRIgldbl so that even
3301 case-blind systems can see the difference.
3303 sPRIi64 (quadfio.U):
3304 This variable, if defined, contains the string used by stdio to
3305 format 64-bit decimal numbers (format 'i') for output.
3307 sPRIo64 (quadfio.U):
3308 This variable, if defined, contains the string used by stdio to
3309 format 64-bit octal numbers (format 'o') for output.
3311 sPRIu64 (quadfio.U):
3312 This variable, if defined, contains the string used by stdio to
3313 format 64-bit unsigned decimal numbers (format 'u') for output.
3315 sPRIx64 (quadfio.U):
3316 This variable, if defined, contains the string used by stdio to
3317 format 64-bit hexadecimal numbers (format 'x') for output.
3319 sPRIXU64 (quadfio.U):
3320 This variable, if defined, contains the string used by stdio to
3321 format 64-bit hExADECimAl numbers (format 'X') for output.
3322 The 'U' in the name is to separate this from sPRIx64 so that even
3323 case-blind systems can see the difference.
3326 This variable holds the path to the package source. It is up to
3327 the Makefile to use this variable and set VPATH accordingly to
3328 find the sources remotely.
3330 sSCNfldbl (longdblfio.U):
3331 This variable, if defined, contains the string used by stdio to
3332 format long doubles (format 'f') for input.
3334 ssizetype (ssizetype.U):
3335 This variable defines ssizetype to be something like ssize_t,
3336 long or int. It is used by functions that return a count
3337 of bytes or an error condition. It must be a signed type.
3338 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3340 startperl (startperl.U):
3341 This variable contains the string to put on the front of a perl
3342 script to make sure (hopefully) that it runs with perl and not some
3343 shell. Of course, that leading line must be followed by the classical
3345 eval 'exec perl -S $0 ${1+"$@"}'
3346 if $running_under_some_shell;
3347 to guarantee perl startup should the shell execute the script. Note
3348 that this magic incatation is not understood by csh.
3350 startsh (startsh.U):
3351 This variable contains the string to put on the front of a shell
3352 script to make sure (hopefully) that it runs with sh and not some
3355 static_ext (Extensions.U):
3356 This variable holds a list of XS extension files we want to
3357 link statically into the package. It is used by Makefile.
3359 stdchar (stdchar.U):
3360 This variable conditionally defines STDCHAR to be the type of char
3361 used in stdio.h. It has the values "unsigned char" or "char".
3363 stdio_base (d_stdstdio.U):
3364 This variable defines how, given a FILE pointer, fp, to access the
3365 _base field (or equivalent) of stdio.h's FILE structure. This will
3366 be used to define the macro FILE_base(fp).
3368 stdio_bufsiz (d_stdstdio.U):
3369 This variable defines how, given a FILE pointer, fp, to determine
3370 the number of bytes store in the I/O buffer pointer to by the
3371 _base field (or equivalent) of stdio.h's FILE structure. This will
3372 be used to define the macro FILE_bufsiz(fp).
3374 stdio_cnt (d_stdstdio.U):
3375 This variable defines how, given a FILE pointer, fp, to access the
3376 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3377 be used to define the macro FILE_cnt(fp).
3379 stdio_filbuf (d_stdstdio.U):
3380 This variable defines how, given a FILE pointer, fp, to tell
3381 stdio to refill it's internal buffers (?). This will
3382 be used to define the macro FILE_filbuf(fp).
3384 stdio_ptr (d_stdstdio.U):
3385 This variable defines how, given a FILE pointer, fp, to access the
3386 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3387 be used to define the macro FILE_ptr(fp).
3389 stdio_stream_array (stdio_streams.U):
3390 This variable tells the name of the array holding the stdio streams.
3391 Usual values include _iob, __iob, and __sF.
3393 strings (i_string.U):
3394 This variable holds the full path of the string header that will be
3395 used. Typically /usr/include/string.h or /usr/include/strings.h.
3398 This variable is defined but not used by Configure.
3399 The value is a plain '' and is not useful.
3401 subversion (patchlevel.U):
3402 The subversion level of this package.
3403 The value of subversion comes from the patchlevel.h file.
3404 In a version number such as 5.6.1, this is the "1".
3405 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3406 This is unique to perl.
3409 This variable holds the place where the manual is located on this
3410 system. It is not the place where the user wants to put his manual
3411 pages. Rather it is the place where Configure may look to find manual
3412 for unix commands (section 1 of the manual usually). See mansrc.
3415 This variable is defined but not used by Configure.
3416 The value is a plain '' and is not useful.
3419 This variable is defined but not used by Configure.
3420 The value is a plain '' and is not useful.
3423 This variable is defined but not used by Configure.
3424 The value is a plain '' and is not useful.
3427 This variable is defined but not used by Configure.
3428 The value is a plain '' and is not useful.
3431 This variable is used internally by Configure to determine the
3432 full pathname (if any) of the test program. After Configure runs,
3433 the value is reset to a plain "test" and is not useful.
3435 timeincl (i_time.U):
3436 This variable holds the full path of the included time header(s).
3438 timetype (d_time.U):
3439 This variable holds the type returned by time(). It can be long,
3440 or time_t on BSD sites (in which case <sys/types.h> should be
3441 included). Anyway, the type Time_t should be used.
3444 This variable is used internally by Configure to determine the
3445 full pathname (if any) of the touch program. After Configure runs,
3446 the value is reset to a plain "touch" and is not useful.
3449 This variable is used internally by Configure to determine the
3450 full pathname (if any) of the tr program. After Configure runs,
3451 the value is reset to a plain "tr" and is not useful.
3454 This variable contains the value to be passed to the tr(1)
3455 command to transliterate a newline. Typical values are
3456 '\012' and '\n'. This is needed for EBCDIC systems where
3457 newline is not necessarily '\012'.
3460 This variable is defined but not used by Configure.
3461 The value is a plain '' and is not useful.
3464 This variable is the size of an U16 in bytes.
3467 This variable contains the C type used for Perl's U16.
3470 This variable is the size of an U32 in bytes.
3473 This variable contains the C type used for Perl's U32.
3476 This variable is the size of an U64 in bytes.
3479 This variable contains the C type used for Perl's U64.
3482 This variable is the size of an U8 in bytes.
3485 This variable contains the C type used for Perl's U8.
3488 This variable contains the format string used for printing a Uid_t.
3490 uidsign (uidsign.U):
3491 This variable contains the signedness of a uidtype.
3492 1 for unsigned, -1 for signed.
3494 uidsize (uidsize.U):
3495 This variable contains the size of a uidtype in bytes.
3497 uidtype (uidtype.U):
3498 This variable defines Uid_t to be something like uid_t, int,
3499 ushort, or whatever type is used to declare user ids in the kernel.
3502 This variable is used internally by Configure to determine the
3503 full pathname (if any) of the uname program. After Configure runs,
3504 the value is reset to a plain "uname" and is not useful.
3507 This variable is used internally by Configure to determine the
3508 full pathname (if any) of the uniq program. After Configure runs,
3509 the value is reset to a plain "uniq" and is not useful.
3511 uquadtype (quadtype.U):
3512 This variable defines Uquad_t to be something like unsigned long,
3513 unsigned int, unsigned long long, uint64_t, or whatever type is
3514 used for 64-bit integers.
3516 use5005threads (usethreads.U):
3517 This variable conditionally defines the USE_5005THREADS symbol,
3518 and indicates that Perl should be built to use the 5.005-based
3519 threading implementation.
3521 use64bitall (use64bits.U):
3522 This variable conditionally defines the USE_64_BIT_ALL symbol,
3523 and indicates that 64-bit integer types should be used
3524 when available. The maximal possible
3525 64-bitness is employed: LP64 or ILP64, meaning that you will
3526 be able to use more than 2 gigabytes of memory. This mode is
3527 even more binary incompatible than USE_64_BIT_INT. You may not
3528 be able to run the resulting executable in a 32-bit CPU at all or
3529 you may need at least to reboot your OS to 64-bit mode.
3531 use64bitint (use64bits.U):
3532 This variable conditionally defines the USE_64_BIT_INT symbol,
3533 and indicates that 64-bit integer types should be used
3534 when available. The minimal possible 64-bitness
3535 is employed, just enough to get 64-bit integers into Perl.
3536 This may mean using for example "long longs", while your memory
3537 may still be limited to 2 gigabytes.
3540 This variable indicates if the system supports dynamic
3541 loading of some sort. See also dlsrc and dlobj.
3543 useithreads (usethreads.U):
3544 This variable conditionally defines the USE_ITHREADS symbol,
3545 and indicates that Perl should be built to use the interpreter-based
3546 threading implementation.
3548 uselargefiles (uselfs.U):
3549 This variable conditionally defines the USE_LARGE_FILES symbol,
3550 and indicates that large file interfaces should be used when
3553 uselongdouble (uselongdbl.U):
3554 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3555 and indicates that long doubles should be used when available.
3557 usemorebits (usemorebits.U):
3558 This variable conditionally defines the USE_MORE_BITS symbol,
3559 and indicates that explicit 64-bit interfaces and long doubles
3560 should be used when available.
3562 usemultiplicity (usemultiplicity.U):
3563 This variable conditionally defines the MULTIPLICITY symbol,
3564 and indicates that Perl should be built to use multiplicity.
3566 usemymalloc (mallocsrc.U):
3567 This variable contains y if the malloc that comes with this package
3568 is desired over the system's version of malloc. People often include
3569 special versions of malloc for effiency, but such versions are often
3570 less portable. See also mallocsrc and mallocobj.
3571 If this is 'y', then -lmalloc is removed from $libs.
3574 This variable contains 'true' or 'false' depending whether the
3575 nm extraction is wanted or not.
3577 useopcode (Extensions.U):
3578 This variable holds either 'true' or 'false' to indicate
3579 whether the Opcode extension should be used. The sole
3580 use for this currently is to allow an easy mechanism
3581 for users to skip the Opcode extension from the Configure
3584 useperlio (useperlio.U):
3585 This variable conditionally defines the USE_PERLIO symbol,
3586 and indicates that the PerlIO abstraction should be
3589 useposix (Extensions.U):
3590 This variable holds either 'true' or 'false' to indicate
3591 whether the POSIX extension should be used. The sole
3592 use for this currently is to allow an easy mechanism
3593 for hints files to indicate that POSIX will not compile
3594 on a particular system.
3597 This variable is set to true when the user agrees to use sfio.
3598 It is set to false when sfio is not available or when the user
3599 explicitely requests not to use sfio. It is here primarily so
3600 that command-line settings can override the auto-detection of
3601 d_sfio without running into a "WHOA THERE".
3603 useshrplib (libperl.U):
3604 This variable is set to 'yes' if the user wishes
3605 to build a shared libperl, and 'no' otherwise.
3607 usesocks (usesocks.U):
3608 This variable conditionally defines the USE_SOCKS symbol,
3609 and indicates that Perl should be built to use SOCKS.
3611 usethreads (usethreads.U):
3612 This variable conditionally defines the USE_THREADS symbol,
3613 and indicates that Perl should be built to use threads.
3615 usevendorprefix (vendorprefix.U):
3616 This variable tells whether the vendorprefix
3617 and consequently other vendor* paths are in use.
3619 usevfork (d_vfork.U):
3620 This variable is set to true when the user accepts to use vfork.
3621 It is set to false when no vfork is available or when the user
3622 explicitely requests not to use vfork.
3625 This variable holds the path of the include files, which is
3626 usually /usr/include. It is mainly used by other Configure units.
3629 This variable is defined but not used by Configure.
3630 The value is a plain '' and is not useful.
3632 uvoformat (perlxvf.U):
3633 This variable contains the format string used for printing
3634 a Perl UV as an unsigned octal integer.
3637 This variable is the size of a UV in bytes.
3640 This variable contains the C type used for Perl's UV.
3642 uvuformat (perlxvf.U):
3643 This variable contains the format string used for printing
3644 a Perl UV as an unsigned decimal integer.
3646 uvxformat (perlxvf.U):
3647 This variable contains the format string used for printing
3648 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3650 uvXUformat (perlxvf.U):
3651 This variable contains the format string used for printing
3652 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3654 vendorarch (vendorarch.U):
3655 This variable contains the value of the PERL_VENDORARCH symbol.
3656 It may have a ~ on the front.
3657 The standard distribution will put nothing in this directory.
3658 Vendors who distribute perl may wish to place their own
3659 architecture-dependent modules and extensions in this directory with
3660 MakeMaker Makefile.PL INSTALLDIRS=vendor
3661 or equivalent. See INSTALL for details.
3663 vendorarchexp (vendorarch.U):
3664 This variable is the ~name expanded version of vendorarch, so that you
3665 may use it directly in Makefiles or shell scripts.
3667 vendorbin (vendorbin.U):
3668 This variable contains the eventual value of the VENDORBIN symbol.
3669 It may have a ~ on the front.
3670 The standard distribution will put nothing in this directory.
3671 Vendors who distribute perl may wish to place additional
3672 binaries in this directory with
3673 MakeMaker Makefile.PL INSTALLDIRS=vendor
3674 or equivalent. See INSTALL for details.
3676 vendorbinexp (vendorbin.U):
3677 This variable is the ~name expanded version of vendorbin, so that you
3678 may use it directly in Makefiles or shell scripts.
3680 vendorlib (vendorlib.U):
3681 This variable contains the eventual value of the VENDORLIB symbol,
3682 which is the name of the private library for this package.
3683 The standard distribution will put nothing in this directory.
3684 Vendors who distribute perl may wish to place their own
3685 modules in this directory with
3686 MakeMaker Makefile.PL INSTALLDIRS=vendor
3687 or equivalent. See INSTALL for details.
3689 vendorlib_stem (vendorlib.U):
3690 This variable is $vendorlibexp with any trailing version-specific component
3691 removed. The elements in inc_version_list (inc_version_list.U) can
3692 be tacked onto this variable to generate a list of directories to search.
3694 vendorlibexp (vendorlib.U):
3695 This variable is the ~name expanded version of vendorlib, so that you
3696 may use it directly in Makefiles or shell scripts.
3698 vendorprefix (vendorprefix.U):
3699 This variable holds the full absolute path of the directory below
3700 which the vendor will install add-on packages.
3701 See INSTALL for usage and examples.
3703 vendorprefixexp (vendorprefix.U):
3704 This variable holds the full absolute path of the directory below
3705 which the vendor will install add-on packages. Derived from vendorprefix.
3707 version (patchlevel.U):
3708 The full version number of this package, such as 5.6.1 (or 5_6_1).
3709 This combines revision, patchlevel, and subversion to get the
3710 full version number, including any possible subversions.
3711 This is suitable for use as a directory name, and hence is
3712 filesystem dependent.
3714 versiononly (versiononly.U):
3715 If set, this symbol indicates that only the version-specific
3716 components of a perl installation should be installed.
3717 This may be useful for making a test installation of a new
3718 version without disturbing the existing installation.
3719 Setting versiononly is equivalent to setting installperl's -v option.
3720 In particular, the non-versioned scripts and programs such as
3721 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3722 (see INSTALL for a more complete list). Nor are the man
3724 Usually, this is undef.
3727 This variable is defined but not used by Configure.
3728 The value is a plain '' and is not useful.
3730 voidflags (voidflags.U):
3731 This variable contains the eventual value of the VOIDFLAGS symbol,
3732 which indicates how much support of the void type is given by this
3733 compiler. See VOIDFLAGS for more info.
3736 This variable holds extra path (space-separated) used to find
3737 libraries on this platform, for example CPU-specific libraries
3738 (on multi-CPU platforms) may be listed here.
3740 xs_apiversion (xs_apiversion.U):
3741 This variable contains the version of the oldest perl binary
3742 compatible with the present perl. perl.c:incpush() and
3743 lib/lib.pm will automatically search in $sitearch for older
3744 directories across major versions back to xs_apiversion.
3745 This is only useful if you have a perl library directory tree
3746 structured like the default one.
3747 See INSTALL for how this works.
3748 The versioned site_perl directory was introduced in 5.005,
3749 so that is the lowest possible value.
3750 Since this can depend on compile time options (such as
3751 bincompat) it is set by Configure. Other non-default sources
3752 of potential incompatibility, such as multiplicity, threads,
3753 debugging, 64bits, sfio, etc., are not checked for currently,
3754 though in principle we could go snooping around in old
3758 This variable is defined but not used by Configure.
3759 The value is a plain '' and is not useful.
3762 This variable is used internally by Configure to determine the
3763 full pathname (if any) of the zip program. After Configure runs,
3764 the value is reset to a plain "zip" and is not useful.