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', 'Mcc', 'cc -M', and 'gcc'.
179 cccdlflags (dlsrc.U):
180 This variable contains any special flags that might need to be
181 passed with 'cc -c' to compile modules to be used to create a shared
182 library that will be used for dynamic loading. For hpux, this
183 should be +z. It is up to the makefile to use it.
186 This variable contains any special flags that might need to be
187 passed to cc to link with a shared library for dynamic loading.
188 It is up to the makefile to use it. For sunos 4.1, it should
192 This variable contains any additional C compiler flags desired by
193 the user. It is up to the Makefile to use this.
195 ccsymbols (Cppsym.U):
196 The variable contains the symbols defined by the C compiler alone.
197 The symbols defined by cpp or by cc when it calls cpp are not in
198 this list, see cppsymbols and cppccsymbols.
199 The list is a space-separated list of symbol=value tokens.
202 Login name of the person who ran the Configure script and answered the
203 questions. This is used to tag both config.sh and config_h.SH.
205 cf_email (cf_email.U):
206 Electronic mail address of the person who ran Configure. This can be
207 used by units that require the user's e-mail, like MailList.U.
210 Holds the output of the "date" command when the configuration file was
211 produced. This is used to tag both config.sh and config_h.SH.
213 charsize (charsize.U):
214 This variable contains the value of the CHARSIZE symbol, which
215 indicates to the C program how many bytes there are in a character.
218 This variable is defined but not used by Configure.
219 The value is a plain '' and is not useful.
222 This variable is defined but not used by Configure.
223 The value is a plain '' and is not useful.
226 This variable is defined but not used by Configure.
227 The value is a plain '' and is not useful.
229 clocktype (d_times.U):
230 This variable holds the type returned by times(). It can be long,
231 or clock_t on BSD sites (in which case <sys/types.h> should be
235 This variable is used internally by Configure to determine the
236 full pathname (if any) of the comm program. After Configure runs,
237 the value is reset to a plain "comm" and is not useful.
240 This variable is defined but not used by Configure.
241 The value is a plain '' and is not useful.
243 CONFIGDOTSH (Oldsyms.U):
244 This is set to 'true' in config.sh so that a shell script
245 sourcing config.sh can tell if it has been sourced already.
247 contains (contains.U):
248 This variable holds the command to do a grep with a proper return
249 status. On most sane systems it is simply "grep". On insane systems
250 it is a grep followed by a cat followed by a test. This variable
251 is primarily for the use of other Configure units.
254 This variable is used internally by Configure to determine the
255 full pathname (if any) of the cp program. After Configure runs,
256 the value is reset to a plain "cp" and is not useful.
259 This variable is defined but not used by Configure.
260 The value is a plain '' and is not useful.
263 This variable is used internally by Configure to determine the
264 full pathname (if any) of the cpp program. After Configure runs,
265 the value is reset to a plain "cpp" and is not useful.
267 cpp_stuff (cpp_stuff.U):
268 This variable contains an identification of the catenation mechanism
269 used by the C preprocessor.
271 cppccsymbols (Cppsym.U):
272 The variable contains the symbols defined by the C compiler
273 when it calls cpp. The symbols defined by the cc alone or cpp
274 alone are not in this list, see ccsymbols and cppsymbols.
275 The list is a space-separated list of symbol=value tokens.
277 cppflags (ccflags.U):
278 This variable holds the flags that will be passed to the C pre-
279 processor. It is up to the Makefile to use it.
281 cpplast (cppstdin.U):
282 This variable has the same functionality as cppminus, only it applies
283 to cpprun and not cppstdin.
285 cppminus (cppstdin.U):
286 This variable contains the second part of the string which will invoke
287 the C preprocessor on the standard input and produce to standard
288 output. This variable will have the value "-" if cppstdin needs
289 a minus to specify standard input, otherwise the value is "".
292 This variable contains the command which will invoke a C preprocessor
293 on standard input and put the output to stdout. It is guaranteed not
294 to be a wrapper and may be a null string if no preprocessor can be
295 made directly available. This preprocessor might be different from the
296 one used by the C compiler. Don't forget to append cpplast after the
297 preprocessor options.
299 cppstdin (cppstdin.U):
300 This variable contains the command which will invoke the C
301 preprocessor on standard input and put the output to stdout.
302 It is primarily used by other Configure units that ask about
303 preprocessor symbols.
305 cppsymbols (Cppsym.U):
306 The variable contains the symbols defined by the C preprocessor
307 alone. The symbols defined by cc or by cc when it calls cpp are
308 not in this list, see ccsymbols and cppccsymbols.
309 The list is a space-separated list of symbol=value tokens.
311 crosscompile (crosscompile.U):
312 This variable conditionally defines the CROSSCOMPILE symbol
313 which signifies that the build process is be a cross-compilation.
314 This is normally set by hints files or from Configure command line.
316 cryptlib (d_crypt.U):
317 This variable holds -lcrypt or the path to a libcrypt.a archive if
318 the crypt() function is not defined in the standard C library. It is
319 up to the Makefile to use this.
322 This variable is used internally by Configure to determine the
323 full pathname (if any) of the csh program. After Configure runs,
324 the value is reset to a plain "csh" and is not useful.
326 d_access (d_access.U):
327 This variable conditionally defines HAS_ACCESS if the access() system
328 call is available to check for access permissions using real IDs.
330 d_accessx (d_accessx.U):
331 This variable conditionally defines the HAS_ACCESSX symbol, which
332 indicates to the C program that the accessx() routine is available.
335 This variable conditionally defines the HAS_ALARM symbol, which
336 indicates to the C program that the alarm() routine is available.
338 d_archlib (archlib.U):
339 This variable conditionally defines ARCHLIB to hold the pathname
340 of architecture-dependent library files for $package. If
341 $archlib is the same as $privlib, then this is set to undef.
344 This variable conditionally defines the HAS_ATOLF symbol, which
345 indicates to the C program that the atolf() routine is available.
348 This variable conditionally defines the HAS_ATOLL symbol, which
349 indicates to the C program that the atoll() routine is available.
351 d_attribut (d_attribut.U):
352 This variable conditionally defines HASATTRIBUTE, which
353 indicates the C compiler can check for function attributes,
354 such as printf formats.
357 This variable conditionally defines the HAS_BCMP symbol if
358 the bcmp() routine is available to compare strings.
361 This variable conditionally defines the HAS_BCOPY symbol if
362 the bcopy() routine is available to copy strings.
364 d_bincompat5005 (bincompat5005.U):
365 This variable conditionally defines BINCOMPAT5005 so that embed.h
366 can take special action if this version of Perl should be
367 binary-compatible with Perl 5.005. This is impossible for builds
368 that use features like threads and multiplicity it is always $undef
372 This symbol conditionally defines the symbol BSD when running on a
375 d_bsdgetpgrp (d_getpgrp.U):
376 This variable conditionally defines USE_BSD_GETPGRP if
377 getpgrp needs one arguments whereas USG one needs none.
379 d_bsdsetpgrp (d_setpgrp.U):
380 This variable conditionally defines USE_BSD_SETPGRP if
381 setpgrp needs two arguments whereas USG one needs none.
382 See also d_setpgid for a POSIX interface.
385 This variable conditionally defines the HAS_BZERO symbol if
386 the bzero() routine is available to set memory to 0.
388 d_casti32 (d_casti32.U):
389 This variable conditionally defines CASTI32, which indicates
390 whether the C compiler can cast large floats to 32-bit ints.
392 d_castneg (d_castneg.U):
393 This variable conditionally defines CASTNEG, which indicates
394 wether the C compiler can cast negative float to unsigned.
396 d_charvspr (d_vprintf.U):
397 This variable conditionally defines CHARVSPRINTF if this system
398 has vsprintf returning type (char*). The trend seems to be to
399 declare it as "int vsprintf()".
402 This variable conditionally defines the HAS_CHOWN symbol, which
403 indicates to the C program that the chown() routine is available.
405 d_chroot (d_chroot.U):
406 This variable conditionally defines the HAS_CHROOT symbol, which
407 indicates to the C program that the chroot() routine is available.
409 d_chsize (d_chsize.U):
410 This variable conditionally defines the CHSIZE symbol, which
411 indicates to the C program that the chsize() routine is available
412 to truncate files. You might need a -lx to get this routine.
414 d_closedir (d_closedir.U):
415 This variable conditionally defines HAS_CLOSEDIR if closedir() is
419 This variable conditionally defines the HASCONST symbol, which
420 indicates to the C program that this C compiler knows about the
424 This variable conditionally defines the CRYPT symbol, which
425 indicates to the C program that the crypt() routine is available
426 to encrypt passwords and the like.
429 This variable conditionally defines the CSH symbol, which
430 indicates to the C program that the C-shell exists.
432 d_cuserid (d_cuserid.U):
433 This variable conditionally defines the HAS_CUSERID symbol, which
434 indicates to the C program that the cuserid() routine is available
435 to get character login names.
437 d_dbl_dig (d_dbl_dig.U):
438 This variable conditionally defines d_dbl_dig if this system's
439 header files provide DBL_DIG, which is the number of significant
440 digits in a double precision number.
442 d_difftime (d_difftime.U):
443 This variable conditionally defines the HAS_DIFFTIME symbol, which
444 indicates to the C program that the difftime() routine is available.
446 d_dirnamlen (i_dirent.U):
447 This variable conditionally defines DIRNAMLEN, which indicates
448 to the C program that the length of directory entry names is
449 provided by a d_namelen field.
451 d_dlerror (d_dlerror.U):
452 This variable conditionally defines the HAS_DLERROR symbol, which
453 indicates to the C program that the dlerror() routine is available.
455 d_dlopen (d_dlopen.U):
456 This variable conditionally defines the HAS_DLOPEN symbol, which
457 indicates to the C program that the dlopen() routine is available.
459 d_dlsymun (d_dlsymun.U):
460 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
461 indicates that we need to prepend an underscore to the symbol
462 name before calling dlsym().
464 d_dosuid (d_dosuid.U):
465 This variable conditionally defines the symbol DOSUID, which
466 tells the C program that it should insert setuid emulation code
467 on hosts which have setuid #! scripts disabled.
469 d_drand48proto (d_drand48proto.U):
470 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
471 which indicates to the C program that the system provides
472 a prototype for the drand48() function. Otherwise, it is
473 up to the program to supply one.
476 This variable conditionally defines HAS_DUP2 if dup2() is
477 available to duplicate file descriptors.
479 d_eaccess (d_eaccess.U):
480 This variable conditionally defines the HAS_EACCESS symbol, which
481 indicates to the C program that the eaccess() routine is available.
483 d_endgrent (d_endgrent.U):
484 This variable conditionally defines the HAS_ENDGRENT symbol, which
485 indicates to the C program that the endgrent() routine is available
486 for sequential access of the group database.
488 d_endhent (d_endhent.U):
489 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
490 available to close whatever was being used for host queries.
492 d_endnent (d_endnent.U):
493 This variable conditionally defines HAS_ENDNETENT if endnetent() is
494 available to close whatever was being used for network queries.
496 d_endpent (d_endpent.U):
497 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
498 available to close whatever was being used for protocol queries.
500 d_endpwent (d_endpwent.U):
501 This variable conditionally defines the HAS_ENDPWENT symbol, which
502 indicates to the C program that the endpwent() routine is available
503 for sequential access of the passwd database.
505 d_endsent (d_endsent.U):
506 This variable conditionally defines HAS_ENDSERVENT if endservent() is
507 available to close whatever was being used for service queries.
509 d_eofnblk (nblock_io.U):
510 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
511 when reading from a non-blocking I/O source.
514 This variable conditionally defines the symbols EUNICE and VAX, which
515 alerts the C program that it must deal with ideosyncracies of VMS.
517 d_fchmod (d_fchmod.U):
518 This variable conditionally defines the HAS_FCHMOD symbol, which
519 indicates to the C program that the fchmod() routine is available
520 to change mode of opened files.
522 d_fchown (d_fchown.U):
523 This variable conditionally defines the HAS_FCHOWN symbol, which
524 indicates to the C program that the fchown() routine is available
525 to change ownership of opened files.
528 This variable conditionally defines the HAS_FCNTL symbol, and indicates
529 whether the fcntl() function exists
531 d_fd_macros (d_fd_set.U):
532 This variable contains the eventual value of the HAS_FD_MACROS symbol,
533 which indicates if your C compiler knows about the macros which
534 manipulate an fd_set.
536 d_fd_set (d_fd_set.U):
537 This variable contains the eventual value of the HAS_FD_SET symbol,
538 which indicates if your C compiler knows about the fd_set typedef.
540 d_fds_bits (d_fd_set.U):
541 This variable contains the eventual value of the HAS_FDS_BITS symbol,
542 which indicates if your fd_set typedef contains the fds_bits member.
543 If you have an fd_set typedef, but the dweebs who installed it did
544 a half-fast job and neglected to provide the macros to manipulate
545 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
547 d_fgetpos (d_fgetpos.U):
548 This variable conditionally defines HAS_FGETPOS if fgetpos() is
549 available to get the file position indicator.
551 d_flexfnam (d_flexfnam.U):
552 This variable conditionally defines the FLEXFILENAMES symbol, which
553 indicates that the system supports filenames longer than 14 characters.
556 This variable conditionally defines HAS_FLOCK if flock() is
557 available to do file locking.
560 This variable conditionally defines the HAS_FORK symbol, which
561 indicates to the C program that the fork() routine is available.
563 d_fpathconf (d_pathconf.U):
564 This variable conditionally defines the HAS_FPATHCONF symbol, which
565 indicates to the C program that the pathconf() routine is available
566 to determine file-system related limits and options associated
567 with a given open file descriptor.
569 d_fpos64_t (d_fpos64_t.U):
570 This symbol will be defined if the C compiler supports fpos64_t.
572 d_frexpl (d_frexpl.U):
573 This variable conditionally defines the HAS_FREXPL symbol, which
574 indicates to the C program that the frexpl() routine is available.
576 d_fs_data_s (d_fs_data_s.U):
577 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
578 which indicates that the struct fs_data is supported.
580 d_fseeko (d_fseeko.U):
581 This variable conditionally defines the HAS_FSEEKO symbol, which
582 indicates to the C program that the fseeko() routine is available.
584 d_fsetpos (d_fsetpos.U):
585 This variable conditionally defines HAS_FSETPOS if fsetpos() is
586 available to set the file position indicator.
588 d_fstatfs (d_fstatfs.U):
589 This variable conditionally defines the HAS_FSTATFS symbol, which
590 indicates to the C program that the fstatfs() routine is available.
592 d_fstatvfs (d_statvfs.U):
593 This variable conditionally defines the HAS_FSTATVFS symbol, which
594 indicates to the C program that the fstatvfs() routine is available.
596 d_ftello (d_ftello.U):
597 This variable conditionally defines the HAS_FTELLO symbol, which
598 indicates to the C program that the ftello() routine is available.
601 This variable conditionally defines the HAS_FTIME symbol, which indicates
602 that the ftime() routine exists. The ftime() routine is basically
603 a sub-second accuracy clock.
605 d_Gconvert (d_gconvert.U):
606 This variable holds what Gconvert is defined as to convert
607 floating point numbers into strings. It could be 'gconvert'
608 or a more complex macro emulating gconvert with gcvt() or sprintf.
610 d_Gconvert='gconvert((x),(n),(t),(b))'
611 d_Gconvert='gcvt((x),(n),(b))'
612 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
614 d_getcwd (d_getcwd.U):
615 This variable conditionally defines the HAS_GETCWD symbol, which
616 indicates to the C program that the getcwd() routine is available
617 to get the current working directory.
619 d_getespwnam (d_getespwnam.U):
620 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
621 available to retrieve enchanced (shadow) password entries by name.
623 d_getfsstat (d_getfsstat.U):
624 This variable conditionally defines the HAS_GETFSSTAT symbol, which
625 indicates to the C program that the getfsstat() routine is available.
627 d_getgrent (d_getgrent.U):
628 This variable conditionally defines the HAS_GETGRENT symbol, which
629 indicates to the C program that the getgrent() routine is available
630 for sequential access of the group database.
632 d_getgrps (d_getgrps.U):
633 This variable conditionally defines the HAS_GETGROUPS symbol, which
634 indicates to the C program that the getgroups() routine is available
635 to get the list of process groups.
637 d_gethbyaddr (d_gethbyad.U):
638 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
639 indicates to the C program that the gethostbyaddr() routine is available
640 to look up hosts by their IP addresses.
642 d_gethbyname (d_gethbynm.U):
643 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
644 indicates to the C program that the gethostbyname() routine is available
645 to look up host names in some data base or other.
647 d_gethent (d_gethent.U):
648 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
649 available to look up host names in some data base or another.
651 d_gethname (d_gethname.U):
652 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
653 indicates to the C program that the gethostname() routine may be
654 used to derive the host name.
656 d_gethostprotos (d_gethostprotos.U):
657 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
658 which indicates to the C program that <netdb.h> supplies
659 prototypes for the various gethost*() functions.
660 See also netdbtype.U for probing for various netdb types.
662 d_getlogin (d_getlogin.U):
663 This variable conditionally defines the HAS_GETLOGIN symbol, which
664 indicates to the C program that the getlogin() routine is available
665 to get the login name.
667 d_getmnt (d_getmnt.U):
668 This variable conditionally defines the HAS_GETMNT symbol, which
669 indicates to the C program that the getmnt() routine is available
670 to retrieve one or more mount info blocks by filename.
672 d_getmntent (d_getmntent.U):
673 This variable conditionally defines the HAS_GETMNTENT symbol, which
674 indicates to the C program that the getmntent() routine is available
675 to iterate through mounted files to get their mount info.
677 d_getnbyaddr (d_getnbyad.U):
678 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
679 indicates to the C program that the getnetbyaddr() routine is available
680 to look up networks by their IP addresses.
682 d_getnbyname (d_getnbynm.U):
683 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
684 indicates to the C program that the getnetbyname() routine is available
685 to look up networks by their names.
687 d_getnent (d_getnent.U):
688 This variable conditionally defines HAS_GETNETENT if getnetent() is
689 available to look up network names in some data base or another.
691 d_getnetprotos (d_getnetprotos.U):
692 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
693 which indicates to the C program that <netdb.h> supplies
694 prototypes for the various getnet*() functions.
695 See also netdbtype.U for probing for various netdb types.
697 d_getpbyname (d_getprotby.U):
698 This variable conditionally defines the HAS_GETPROTOBYNAME
699 symbol, which indicates to the C program that the
700 getprotobyname() routine is available to look up protocols
703 d_getpbynumber (d_getprotby.U):
704 This variable conditionally defines the HAS_GETPROTOBYNUMBER
705 symbol, which indicates to the C program that the
706 getprotobynumber() routine is available to look up protocols
709 d_getpent (d_getpent.U):
710 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
711 available to look up protocols in some data base or another.
713 d_getpgid (d_getpgid.U):
714 This variable conditionally defines the HAS_GETPGID symbol, which
715 indicates to the C program that the getpgid(pid) function
716 is available to get the process group id.
718 d_getpgrp2 (d_getpgrp2.U):
719 This variable conditionally defines the HAS_GETPGRP2 symbol, which
720 indicates to the C program that the getpgrp2() (as in DG/UX) routine
721 is available to get the current process group.
723 d_getpgrp (d_getpgrp.U):
724 This variable conditionally defines HAS_GETPGRP if getpgrp() is
725 available to get the current process group.
727 d_getppid (d_getppid.U):
728 This variable conditionally defines the HAS_GETPPID symbol, which
729 indicates to the C program that the getppid() routine is available
730 to get the parent process ID.
732 d_getprior (d_getprior.U):
733 This variable conditionally defines HAS_GETPRIORITY if getpriority()
734 is available to get a process's priority.
736 d_getprotoprotos (d_getprotoprotos.U):
737 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
738 which indicates to the C program that <netdb.h> supplies
739 prototypes for the various getproto*() functions.
740 See also netdbtype.U for probing for various netdb types.
742 d_getprpwnam (d_getprpwnam.U):
743 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
744 available to retrieve protected (shadow) password entries by name.
746 d_getpwent (d_getpwent.U):
747 This variable conditionally defines the HAS_GETPWENT symbol, which
748 indicates to the C program that the getpwent() routine is available
749 for sequential access of the passwd database.
751 d_getsbyname (d_getsrvby.U):
752 This variable conditionally defines the HAS_GETSERVBYNAME
753 symbol, which indicates to the C program that the
754 getservbyname() routine is available to look up services
757 d_getsbyport (d_getsrvby.U):
758 This variable conditionally defines the HAS_GETSERVBYPORT
759 symbol, which indicates to the C program that the
760 getservbyport() routine is available to look up services
763 d_getsent (d_getsent.U):
764 This variable conditionally defines HAS_GETSERVENT if getservent() is
765 available to look up network services in some data base or another.
767 d_getservprotos (d_getservprotos.U):
768 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
769 which indicates to the C program that <netdb.h> supplies
770 prototypes for the various getserv*() functions.
771 See also netdbtype.U for probing for various netdb types.
773 d_getspnam (d_getspnam.U):
774 This variable conditionally defines HAS_GETSPNAM if getspnam() is
775 available to retrieve SysV shadow password entries by name.
777 d_gettimeod (d_ftime.U):
778 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
779 indicates that the gettimeofday() system call exists (to obtain a
780 sub-second accuracy clock). You should probably include <sys/resource.h>.
782 d_gnulibc (d_gnulibc.U):
783 Defined if we're dealing with the GNU C Library.
785 d_grpasswd (i_grp.U):
786 This variable conditionally defines GRPASSWD, which indicates
787 that struct group in <grp.h> contains gr_passwd.
789 d_hasmntopt (d_hasmntopt.U):
790 This variable conditionally defines the HAS_HASMNTOPT symbol, which
791 indicates to the C program that the hasmntopt() routine is available
792 to query the mount options of file systems.
795 This variable conditionally defines HAS_HTONL if htonl() and its
796 friends are available to do network order byte swapping.
799 This variable conditionally defines the HAS_ICONV symbol, which
800 indicates to the C program that the iconv() routine is available.
802 d_index (d_strchr.U):
803 This variable conditionally defines HAS_INDEX if index() and
804 rindex() are available for string searching.
806 d_inetaton (d_inetaton.U):
807 This variable conditionally defines the HAS_INET_ATON symbol, which
808 indicates to the C program that the inet_aton() function is available
809 to parse IP address "dotted-quad" strings.
811 d_int64_t (d_int64_t.U):
812 This symbol will be defined if the C compiler supports int64_t.
814 d_isascii (d_isascii.U):
815 This variable conditionally defines the HAS_ISASCII constant,
816 which indicates to the C program that isascii() is available.
819 This variable conditionally defines the HAS_ISNAN symbol, which
820 indicates to the C program that the isnan() routine is available.
822 d_isnanl (d_isnanl.U):
823 This variable conditionally defines the HAS_ISNANL symbol, which
824 indicates to the C program that the isnanl() routine is available.
826 d_killpg (d_killpg.U):
827 This variable conditionally defines the HAS_KILLPG symbol, which
828 indicates to the C program that the killpg() routine is available
829 to kill process groups.
831 d_lchown (d_lchown.U):
832 This variable conditionally defines the HAS_LCHOWN symbol, which
833 indicates to the C program that the lchown() routine is available
834 to operate on a symbolic link (instead of following the link).
836 d_ldbl_dig (d_ldbl_dig.U):
837 This variable conditionally defines d_ldbl_dig if this system's
838 header files provide LDBL_DIG, which is the number of significant
839 digits in a long double precision number.
842 This variable conditionally defines HAS_LINK if link() is
843 available to create hard links.
845 d_locconv (d_locconv.U):
846 This variable conditionally defines HAS_LOCALECONV if localeconv() is
847 available for numeric and monetary formatting conventions.
850 This variable conditionally defines HAS_LOCKF if lockf() is
851 available to do file locking.
853 d_longdbl (d_longdbl.U):
854 This variable conditionally defines HAS_LONG_DOUBLE if
855 the long double type is supported.
857 d_longlong (d_longlong.U):
858 This variable conditionally defines HAS_LONG_LONG if
859 the long long type is supported.
861 d_lseekproto (d_lseekproto.U):
862 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
863 which indicates to the C program that the system provides
864 a prototype for the lseek() function. Otherwise, it is
865 up to the program to supply one.
868 This variable conditionally defines HAS_LSTAT if lstat() is
869 available to do file stats on symbolic links.
871 d_madvise (d_madvise.U):
872 This variable conditionally defines HAS_MADVISE if madvise() is
873 available to map a file into memory.
876 This variable conditionally defines the HAS_MBLEN symbol, which
877 indicates to the C program that the mblen() routine is available
878 to find the number of bytes in a multibye character.
880 d_mbstowcs (d_mbstowcs.U):
881 This variable conditionally defines the HAS_MBSTOWCS symbol, which
882 indicates to the C program that the mbstowcs() routine is available
883 to convert a multibyte string into a wide character string.
885 d_mbtowc (d_mbtowc.U):
886 This variable conditionally defines the HAS_MBTOWC symbol, which
887 indicates to the C program that the mbtowc() routine is available
888 to convert multibyte to a wide character.
890 d_memchr (d_memchr.U):
891 This variable conditionally defines the HAS_MEMCHR symbol, which
892 indicates to the C program that the memchr() routine is available
893 to locate characters within a C string.
895 d_memcmp (d_memcmp.U):
896 This variable conditionally defines the HAS_MEMCMP symbol, which
897 indicates to the C program that the memcmp() routine is available
898 to compare blocks of memory.
900 d_memcpy (d_memcpy.U):
901 This variable conditionally defines the HAS_MEMCPY symbol, which
902 indicates to the C program that the memcpy() routine is available
903 to copy blocks of memory.
905 d_memmove (d_memmove.U):
906 This variable conditionally defines the HAS_MEMMOVE symbol, which
907 indicates to the C program that the memmove() routine is available
908 to copy potentatially overlapping blocks of memory.
910 d_memset (d_memset.U):
911 This variable conditionally defines the HAS_MEMSET symbol, which
912 indicates to the C program that the memset() routine is available
913 to set blocks of memory.
916 This variable conditionally defines the HAS_MKDIR symbol, which
917 indicates to the C program that the mkdir() routine is available
918 to create directories..
920 d_mkdtemp (d_mkdtemp.U):
921 This variable conditionally defines the HAS_MKDTEMP symbol, which
922 indicates to the C program that the mkdtemp() routine is available
923 to exclusively create a uniquely named temporary directory.
925 d_mkfifo (d_mkfifo.U):
926 This variable conditionally defines the HAS_MKFIFO symbol, which
927 indicates to the C program that the mkfifo() routine is available.
929 d_mkstemp (d_mkstemp.U):
930 This variable conditionally defines the HAS_MKSTEMP symbol, which
931 indicates to the C program that the mkstemp() routine is available
932 to exclusively create and open a uniquely named temporary file.
934 d_mkstemps (d_mkstemps.U):
935 This variable conditionally defines the HAS_MKSTEMPS symbol, which
936 indicates to the C program that the mkstemps() routine is available
937 to exclusively create and open a uniquely named (with a suffix)
940 d_mktime (d_mktime.U):
941 This variable conditionally defines the HAS_MKTIME symbol, which
942 indicates to the C program that the mktime() routine is available.
945 This variable conditionally defines HAS_MMAP if mmap() is
946 available to map a file into memory.
949 This variable conditionally defines the HAS_MODFL symbol, which
950 indicates to the C program that the modfl() routine is available.
952 d_mprotect (d_mprotect.U):
953 This variable conditionally defines HAS_MPROTECT if mprotect() is
954 available to modify the access protection of a memory mapped file.
957 This variable conditionally defines the HAS_MSG symbol, which
958 indicates that the entire msg*(2) library is present.
960 d_msg_ctrunc (d_socket.U):
961 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
962 which indicates that the MSG_CTRUNC is available. #ifdef is
963 not enough because it may be an enum, glibc has been known to do this.
965 d_msg_dontroute (d_socket.U):
966 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
967 which indicates that the MSG_DONTROUTE is available. #ifdef is
968 not enough because it may be an enum, glibc has been known to do this.
970 d_msg_oob (d_socket.U):
971 This variable conditionally defines the HAS_MSG_OOB symbol,
972 which indicates that the MSG_OOB is available. #ifdef is
973 not enough because it may be an enum, glibc has been known to do this.
975 d_msg_peek (d_socket.U):
976 This variable conditionally defines the HAS_MSG_PEEK symbol,
977 which indicates that the MSG_PEEK is available. #ifdef is
978 not enough because it may be an enum, glibc has been known to do this.
980 d_msg_proxy (d_socket.U):
981 This variable conditionally defines the HAS_MSG_PROXY symbol,
982 which indicates that the MSG_PROXY is available. #ifdef is
983 not enough because it may be an enum, glibc has been known to do this.
985 d_msgctl (d_msgctl.U):
986 This variable conditionally defines the HAS_MSGCTL symbol, which
987 indicates to the C program that the msgctl() routine is available.
989 d_msgget (d_msgget.U):
990 This variable conditionally defines the HAS_MSGGET symbol, which
991 indicates to the C program that the msgget() routine is available.
993 d_msgrcv (d_msgrcv.U):
994 This variable conditionally defines the HAS_MSGRCV symbol, which
995 indicates to the C program that the msgrcv() routine is available.
997 d_msgsnd (d_msgsnd.U):
998 This variable conditionally defines the HAS_MSGSND symbol, which
999 indicates to the C program that the msgsnd() routine is available.
1001 d_msync (d_msync.U):
1002 This variable conditionally defines HAS_MSYNC if msync() is
1003 available to synchronize a mapped file.
1005 d_munmap (d_munmap.U):
1006 This variable conditionally defines HAS_MUNMAP if munmap() is
1007 available to unmap a region mapped by mmap().
1009 d_mymalloc (mallocsrc.U):
1010 This variable conditionally defines MYMALLOC in case other parts
1011 of the source want to take special action if MYMALLOC is used.
1012 This may include different sorts of profiling or error detection.
1015 This variable conditionally defines the HAS_NICE symbol, which
1016 indicates to the C program that the nice() routine is available.
1018 d_nv_preserves_uv (perlxv.U):
1019 This variable indicates whether a variable of type nvtype
1020 can preserve all the bits a variable of type uvtype.
1022 d_nv_preserves_uv_bits (perlxv.U):
1023 This variable indicates how many of bits type uvtype
1024 a variable nvtype can preserve.
1026 d_off64_t (d_off64_t.U):
1027 This symbol will be defined if the C compiler supports off64_t.
1029 d_old_pthread_create_joinable (d_pthrattrj.U):
1030 This variable conditionally defines pthread_create_joinable.
1031 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1033 d_oldpthreads (usethreads.U):
1034 This variable conditionally defines the OLD_PTHREADS_API symbol,
1035 and indicates that Perl should be built to use the old
1036 draft POSIX threads API. This is only potentially meaningful if
1039 d_oldsock (d_socket.U):
1040 This variable conditionally defines the OLDSOCKET symbol, which
1041 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1043 d_open3 (d_open3.U):
1044 This variable conditionally defines the HAS_OPEN3 manifest constant,
1045 which indicates to the C program that the 3 argument version of
1046 the open(2) function is available.
1048 d_pathconf (d_pathconf.U):
1049 This variable conditionally defines the HAS_PATHCONF symbol, which
1050 indicates to the C program that the pathconf() routine is available
1051 to determine file-system related limits and options associated
1052 with a given filename.
1054 d_pause (d_pause.U):
1055 This variable conditionally defines the HAS_PAUSE symbol, which
1056 indicates to the C program that the pause() routine is available
1057 to suspend a process until a signal is received.
1059 d_perl_otherlibdirs (otherlibdirs.U):
1060 This variable conditionally defines PERL_OTHERLIBDIRS, which
1061 contains a colon-separated set of paths for the perl binary to
1062 include in @INC. See also otherlibdirs.
1064 d_phostname (d_gethname.U):
1065 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1066 contains the shell command which, when fed to popen(), may be
1067 used to derive the host name.
1070 This variable conditionally defines the HAS_PIPE symbol, which
1071 indicates to the C program that the pipe() routine is available
1072 to create an inter-process channel.
1075 This variable conditionally defines the HAS_POLL symbol, which
1076 indicates to the C program that the poll() routine is available
1077 to poll active file descriptors.
1079 d_portable (d_portable.U):
1080 This variable conditionally defines the PORTABLE symbol, which
1081 indicates to the C program that it should not assume that it is
1082 running on the machine it was compiled on.
1084 d_PRId64 (quadfio.U):
1085 This variable conditionally defines the PERL_PRId64 symbol, which
1086 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1088 d_PRIeldbl (longdblfio.U):
1089 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1090 indiciates that stdio has a symbol to print long doubles.
1092 d_PRIEldbl (longdblfio.U):
1093 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1094 indiciates that stdio has a symbol to print long doubles.
1096 d_PRIfldbl (longdblfio.U):
1097 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1098 indiciates that stdio has a symbol to print long doubles.
1100 d_PRIFldbl (longdblfio.U):
1101 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1102 indiciates that stdio has a symbol to print long doubles.
1104 d_PRIgldbl (longdblfio.U):
1105 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1106 indiciates that stdio has a symbol to print long doubles.
1108 d_PRIGldbl (longdblfio.U):
1109 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1110 indiciates that stdio has a symbol to print long doubles.
1112 d_PRIi64 (quadfio.U):
1113 This variable conditionally defines the PERL_PRIi64 symbol, which
1114 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1116 d_PRIo64 (quadfio.U):
1117 This variable conditionally defines the PERL_PRIo64 symbol, which
1118 indiciates that stdio has a symbol to print 64-bit octal numbers.
1120 d_PRIu64 (quadfio.U):
1121 This variable conditionally defines the PERL_PRIu64 symbol, which
1122 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1125 d_PRIx64 (quadfio.U):
1126 This variable conditionally defines the PERL_PRIx64 symbol, which
1127 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1129 d_PRIX64 (quadfio.U):
1130 This variable conditionally defines the PERL_PRIX64 symbol, which
1131 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1133 d_pthread_yield (d_pthread_y.U):
1134 This variable conditionally defines the HAS_PTHREAD_YIELD
1135 symbol if the pthread_yield routine is available to yield
1136 the execution of the current thread.
1139 This variable conditionally defines PWAGE, which indicates
1140 that struct passwd contains pw_age.
1142 d_pwchange (i_pwd.U):
1143 This variable conditionally defines PWCHANGE, which indicates
1144 that struct passwd contains pw_change.
1146 d_pwclass (i_pwd.U):
1147 This variable conditionally defines PWCLASS, which indicates
1148 that struct passwd contains pw_class.
1150 d_pwcomment (i_pwd.U):
1151 This variable conditionally defines PWCOMMENT, which indicates
1152 that struct passwd contains pw_comment.
1154 d_pwexpire (i_pwd.U):
1155 This variable conditionally defines PWEXPIRE, which indicates
1156 that struct passwd contains pw_expire.
1158 d_pwgecos (i_pwd.U):
1159 This variable conditionally defines PWGECOS, which indicates
1160 that struct passwd contains pw_gecos.
1162 d_pwpasswd (i_pwd.U):
1163 This variable conditionally defines PWPASSWD, which indicates
1164 that struct passwd contains pw_passwd.
1166 d_pwquota (i_pwd.U):
1167 This variable conditionally defines PWQUOTA, which indicates
1168 that struct passwd contains pw_quota.
1170 d_qgcvt (d_qgcvt.U):
1171 This variable conditionally defines the HAS_QGCVT symbol, which
1172 indicates to the C program that the qgcvt() routine is available.
1174 d_quad (quadtype.U):
1175 This variable, if defined, tells that there's a 64-bit integer type,
1178 d_readdir (d_readdir.U):
1179 This variable conditionally defines HAS_READDIR if readdir() is
1180 available to read directory entries.
1182 d_readlink (d_readlink.U):
1183 This variable conditionally defines the HAS_READLINK symbol, which
1184 indicates to the C program that the readlink() routine is available
1185 to read the value of a symbolic link.
1187 d_rename (d_rename.U):
1188 This variable conditionally defines the HAS_RENAME symbol, which
1189 indicates to the C program that the rename() routine is available
1192 d_rewinddir (d_readdir.U):
1193 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1196 d_rmdir (d_rmdir.U):
1197 This variable conditionally defines HAS_RMDIR if rmdir() is
1198 available to remove directories.
1200 d_safebcpy (d_safebcpy.U):
1201 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1202 the bcopy() routine can do overlapping copies.
1204 d_safemcpy (d_safemcpy.U):
1205 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1206 the memcpy() routine can do overlapping copies.
1208 d_sanemcmp (d_sanemcmp.U):
1209 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1210 the memcpy() routine is available and can be used to compare relative
1211 magnitudes of chars with their high bits set.
1213 d_sched_yield (d_pthread_y.U):
1214 This variable conditionally defines the HAS_SCHED_YIELD
1215 symbol if the sched_yield routine is available to yield
1216 the execution of the current thread.
1218 d_scm_rights (d_socket.U):
1219 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1220 which indicates that the SCM_RIGHTS is available. #ifdef is
1221 not enough because it may be an enum, glibc has been known to do this.
1223 d_seekdir (d_readdir.U):
1224 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1227 d_select (d_select.U):
1228 This variable conditionally defines HAS_SELECT if select() is
1229 available to select active file descriptors. A <sys/time.h>
1230 inclusion may be necessary for the timeout field.
1233 This variable conditionally defines the HAS_SEM symbol, which
1234 indicates that the entire sem*(2) library is present.
1236 d_semctl (d_semctl.U):
1237 This variable conditionally defines the HAS_SEMCTL symbol, which
1238 indicates to the C program that the semctl() routine is available.
1240 d_semctl_semid_ds (d_union_semun.U):
1241 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1242 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1244 d_semctl_semun (d_union_semun.U):
1245 This variable conditionally defines USE_SEMCTL_SEMUN, which
1246 indicates that union semun is to be used for semctl IPC_STAT.
1248 d_semget (d_semget.U):
1249 This variable conditionally defines the HAS_SEMGET symbol, which
1250 indicates to the C program that the semget() routine is available.
1252 d_semop (d_semop.U):
1253 This variable conditionally defines the HAS_SEMOP symbol, which
1254 indicates to the C program that the semop() routine is available.
1256 d_setegid (d_setegid.U):
1257 This variable conditionally defines the HAS_SETEGID symbol, which
1258 indicates to the C program that the setegid() routine is available
1259 to change the effective gid of the current program.
1261 d_seteuid (d_seteuid.U):
1262 This variable conditionally defines the HAS_SETEUID symbol, which
1263 indicates to the C program that the seteuid() routine is available
1264 to change the effective uid of the current program.
1266 d_setgrent (d_setgrent.U):
1267 This variable conditionally defines the HAS_SETGRENT symbol, which
1268 indicates to the C program that the setgrent() routine is available
1269 for initializing sequential access to the group database.
1271 d_setgrps (d_setgrps.U):
1272 This variable conditionally defines the HAS_SETGROUPS symbol, which
1273 indicates to the C program that the setgroups() routine is available
1274 to set the list of process groups.
1276 d_sethent (d_sethent.U):
1277 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1280 d_setlinebuf (d_setlnbuf.U):
1281 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1282 indicates to the C program that the setlinebuf() routine is available
1283 to change stderr or stdout from block-buffered or unbuffered to a
1286 d_setlocale (d_setlocale.U):
1287 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1288 available to handle locale-specific ctype implementations.
1290 d_setnent (d_setnent.U):
1291 This variable conditionally defines HAS_SETNETENT if setnetent() is
1294 d_setpent (d_setpent.U):
1295 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1298 d_setpgid (d_setpgid.U):
1299 This variable conditionally defines the HAS_SETPGID symbol if the
1300 setpgid(pid, gpid) function is available to set process group ID.
1302 d_setpgrp2 (d_setpgrp2.U):
1303 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1304 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1305 is available to set the current process group.
1307 d_setpgrp (d_setpgrp.U):
1308 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1309 available to set the current process group.
1311 d_setprior (d_setprior.U):
1312 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1313 is available to set a process's priority.
1315 d_setpwent (d_setpwent.U):
1316 This variable conditionally defines the HAS_SETPWENT symbol, which
1317 indicates to the C program that the setpwent() routine is available
1318 for initializing sequential access to the passwd database.
1320 d_setregid (d_setregid.U):
1321 This variable conditionally defines HAS_SETREGID if setregid() is
1322 available to change the real and effective gid of the current
1325 d_setresgid (d_setregid.U):
1326 This variable conditionally defines HAS_SETRESGID if setresgid() is
1327 available to change the real, effective and saved gid of the current
1330 d_setresuid (d_setreuid.U):
1331 This variable conditionally defines HAS_SETREUID if setresuid() is
1332 available to change the real, effective and saved uid of the current
1335 d_setreuid (d_setreuid.U):
1336 This variable conditionally defines HAS_SETREUID if setreuid() is
1337 available to change the real and effective uid of the current
1340 d_setrgid (d_setrgid.U):
1341 This variable conditionally defines the HAS_SETRGID symbol, which
1342 indicates to the C program that the setrgid() routine is available
1343 to change the real gid of the current program.
1345 d_setruid (d_setruid.U):
1346 This variable conditionally defines the HAS_SETRUID symbol, which
1347 indicates to the C program that the setruid() routine is available
1348 to change the real uid of the current program.
1350 d_setsent (d_setsent.U):
1351 This variable conditionally defines HAS_SETSERVENT if setservent() is
1354 d_setsid (d_setsid.U):
1355 This variable conditionally defines HAS_SETSID if setsid() is
1356 available to set the process group ID.
1358 d_setvbuf (d_setvbuf.U):
1359 This variable conditionally defines the HAS_SETVBUF symbol, which
1360 indicates to the C program that the setvbuf() routine is available
1361 to change buffering on an open stdio stream.
1364 This variable conditionally defines the USE_SFIO symbol,
1365 and indicates whether sfio is available (and should be used).
1368 This variable conditionally defines the HAS_SHM symbol, which
1369 indicates that the entire shm*(2) library is present.
1371 d_shmat (d_shmat.U):
1372 This variable conditionally defines the HAS_SHMAT symbol, which
1373 indicates to the C program that the shmat() routine is available.
1375 d_shmatprototype (d_shmat.U):
1376 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1377 symbol, which indicates that sys/shm.h has a prototype for
1380 d_shmctl (d_shmctl.U):
1381 This variable conditionally defines the HAS_SHMCTL symbol, which
1382 indicates to the C program that the shmctl() routine is available.
1384 d_shmdt (d_shmdt.U):
1385 This variable conditionally defines the HAS_SHMDT symbol, which
1386 indicates to the C program that the shmdt() routine is available.
1388 d_shmget (d_shmget.U):
1389 This variable conditionally defines the HAS_SHMGET symbol, which
1390 indicates to the C program that the shmget() routine is available.
1392 d_sigaction (d_sigaction.U):
1393 This variable conditionally defines the HAS_SIGACTION symbol, which
1394 indicates that the Vr4 sigaction() routine is available.
1396 d_sigsetjmp (d_sigsetjmp.U):
1397 This variable conditionally defines the HAS_SIGSETJMP symbol,
1398 which indicates that the sigsetjmp() routine is available to
1399 call setjmp() and optionally save the process's signal mask.
1401 d_socket (d_socket.U):
1402 This variable conditionally defines HAS_SOCKET, which indicates
1403 that the BSD socket interface is supported.
1405 d_socklen_t (d_socklen_t.U):
1406 This symbol will be defined if the C compiler supports socklen_t.
1408 d_sockpair (d_socket.U):
1409 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1410 indicates that the BSD socketpair() is supported.
1412 d_sqrtl (d_sqrtl.U):
1413 This variable conditionally defines the HAS_SQRTL symbol, which
1414 indicates to the C program that the sqrtl() routine is available.
1416 d_statblks (d_statblks.U):
1417 This variable conditionally defines USE_STAT_BLOCKS
1418 if this system has a stat structure declaring
1419 st_blksize and st_blocks.
1421 d_statfs_f_flags (d_statfs_f_flags.U):
1422 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1423 symbol, which indicates to struct statfs from has f_flags member.
1424 This kind of struct statfs is coming from sys/mount.h (BSD),
1425 not from sys/statfs.h (SYSV).
1427 d_statfs_s (d_statfs_s.U):
1428 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1429 which indicates that the struct statfs is supported.
1431 d_statvfs (d_statvfs.U):
1432 This variable conditionally defines the HAS_STATVFS symbol, which
1433 indicates to the C program that the statvfs() routine is available.
1435 d_stdio_cnt_lval (d_stdstdio.U):
1436 This variable conditionally defines STDIO_CNT_LVALUE if the
1437 FILE_cnt macro can be used as an lvalue.
1439 d_stdio_ptr_lval (d_stdstdio.U):
1440 This variable conditionally defines STDIO_PTR_LVALUE if the
1441 FILE_ptr macro can be used as an lvalue.
1443 d_stdio_stream_array (stdio_streams.U):
1444 This variable tells whether there is an array holding
1447 d_stdiobase (d_stdstdio.U):
1448 This variable conditionally defines USE_STDIO_BASE if this system
1449 has a FILE structure declaring a usable _base field (or equivalent)
1452 d_stdstdio (d_stdstdio.U):
1453 This variable conditionally defines USE_STDIO_PTR if this system
1454 has a FILE structure declaring usable _ptr and _cnt fields (or
1455 equivalent) in stdio.h.
1457 d_strchr (d_strchr.U):
1458 This variable conditionally defines HAS_STRCHR if strchr() and
1459 strrchr() are available for string searching.
1461 d_strcoll (d_strcoll.U):
1462 This variable conditionally defines HAS_STRCOLL if strcoll() is
1463 available to compare strings using collating information.
1465 d_strctcpy (d_strctcpy.U):
1466 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1467 indicates to the C program that this C compiler knows how to copy
1470 d_strerrm (d_strerror.U):
1471 This variable holds what Strerrr is defined as to translate an error
1472 code condition into an error message string. It could be 'strerror'
1473 or a more complex macro emulating strrror with sys_errlist[], or the
1474 "unknown" string when both strerror and sys_errlist are missing.
1476 d_strerror (d_strerror.U):
1477 This variable conditionally defines HAS_STRERROR if strerror() is
1478 available to translate error numbers to strings.
1480 d_strtod (d_strtod.U):
1481 This variable conditionally defines the HAS_STRTOD symbol, which
1482 indicates to the C program that the strtod() routine is available
1483 to provide better numeric string conversion than atof().
1485 d_strtol (d_strtol.U):
1486 This variable conditionally defines the HAS_STRTOL symbol, which
1487 indicates to the C program that the strtol() routine is available
1488 to provide better numeric string conversion than atoi() and friends.
1490 d_strtold (d_strtold.U):
1491 This variable conditionally defines the HAS_STRTOLD symbol, which
1492 indicates to the C program that the strtold() routine is available.
1494 d_strtoll (d_strtoll.U):
1495 This variable conditionally defines the HAS_STRTOLL symbol, which
1496 indicates to the C program that the strtoll() routine is available.
1498 d_strtoul (d_strtoul.U):
1499 This variable conditionally defines the HAS_STRTOUL symbol, which
1500 indicates to the C program that the strtoul() routine is available
1501 to provide conversion of strings to unsigned long.
1503 d_strtoull (d_strtoull.U):
1504 This variable conditionally defines the HAS_STRTOULL symbol, which
1505 indicates to the C program that the strtoull() routine is available.
1507 d_strtouq (d_strtouq.U):
1508 This variable conditionally defines the HAS_STRTOUQ symbol, which
1509 indicates to the C program that the strtouq() routine is available.
1511 d_strxfrm (d_strxfrm.U):
1512 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1513 available to transform strings.
1515 d_suidsafe (d_dosuid.U):
1516 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1517 if setuid scripts can be secure. This test looks in /dev/fd/.
1519 d_symlink (d_symlink.U):
1520 This variable conditionally defines the HAS_SYMLINK symbol, which
1521 indicates to the C program that the symlink() routine is available
1522 to create symbolic links.
1524 d_syscall (d_syscall.U):
1525 This variable conditionally defines HAS_SYSCALL if syscall() is
1526 available call arbitrary system calls.
1528 d_sysconf (d_sysconf.U):
1529 This variable conditionally defines the HAS_SYSCONF symbol, which
1530 indicates to the C program that the sysconf() routine is available
1531 to determine system related limits and options.
1533 d_sysernlst (d_strerror.U):
1534 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1535 is available to translate error numbers to the symbolic name.
1537 d_syserrlst (d_strerror.U):
1538 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1539 available to translate error numbers to strings.
1541 d_system (d_system.U):
1542 This variable conditionally defines HAS_SYSTEM if system() is
1543 available to issue a shell command.
1545 d_tcgetpgrp (d_tcgtpgrp.U):
1546 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1547 indicates to the C program that the tcgetpgrp() routine is available.
1548 to get foreground process group ID.
1550 d_tcsetpgrp (d_tcstpgrp.U):
1551 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1552 indicates to the C program that the tcsetpgrp() routine is available
1553 to set foreground process group ID.
1555 d_telldir (d_readdir.U):
1556 This variable conditionally defines HAS_TELLDIR if telldir() is
1559 d_telldirproto (d_telldirproto.U):
1560 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1561 which indicates to the C program that the system provides
1562 a prototype for the telldir() function. Otherwise, it is
1563 up to the program to supply one.
1566 This variable conditionally defines the HAS_TIME symbol, which indicates
1567 that the time() routine exists. The time() routine is normaly
1568 provided on UNIX systems.
1570 d_times (d_times.U):
1571 This variable conditionally defines the HAS_TIMES symbol, which indicates
1572 that the times() routine exists. The times() routine is normaly
1573 provided on UNIX systems. You may have to include <sys/times.h>.
1575 d_truncate (d_truncate.U):
1576 This variable conditionally defines HAS_TRUNCATE if truncate() is
1577 available to truncate files.
1579 d_tzname (d_tzname.U):
1580 This variable conditionally defines HAS_TZNAME if tzname[] is
1581 available to access timezone names.
1583 d_umask (d_umask.U):
1584 This variable conditionally defines the HAS_UMASK symbol, which
1585 indicates to the C program that the umask() routine is available.
1586 to set and get the value of the file creation mask.
1588 d_uname (d_gethname.U):
1589 This variable conditionally defines the HAS_UNAME symbol, which
1590 indicates to the C program that the uname() routine may be
1591 used to derive the host name.
1593 d_union_semun (d_union_semun.U):
1594 This variable conditionally defines HAS_UNION_SEMUN if the
1595 union semun is defined by including <sys/sem.h>.
1597 d_ustat (d_ustat.U):
1598 This variable conditionally defines HAS_USTAT if ustat() is
1599 available to query file system statistics by dev_t.
1601 d_vendorarch (vendorarch.U):
1602 This variable conditionally defined PERL_VENDORARCH.
1604 d_vendorbin (vendorbin.U):
1605 This variable conditionally defines PERL_VENDORBIN.
1607 d_vendorlib (vendorlib.U):
1608 This variable conditionally defines PERL_VENDORLIB.
1610 d_vfork (d_vfork.U):
1611 This variable conditionally defines the HAS_VFORK symbol, which
1612 indicates the vfork() routine is available.
1614 d_void_closedir (d_closedir.U):
1615 This variable conditionally defines VOID_CLOSEDIR if closedir()
1616 does not return a value.
1618 d_voidsig (d_voidsig.U):
1619 This variable conditionally defines VOIDSIG if this system
1620 declares "void (*signal(...))()" in signal.h. The old way was to
1621 declare it as "int (*signal(...))()".
1623 d_voidtty (i_sysioctl.U):
1624 This variable conditionally defines USE_IOCNOTTY to indicate that the
1625 ioctl() call with TIOCNOTTY should be used to void tty association.
1626 Otherwise (on USG probably), it is enough to close the standard file
1627 decriptors and do a setpgrp().
1629 d_volatile (d_volatile.U):
1630 This variable conditionally defines the HASVOLATILE symbol, which
1631 indicates to the C program that this C compiler knows about the
1632 volatile declaration.
1634 d_vprintf (d_vprintf.U):
1635 This variable conditionally defines the HAS_VPRINTF symbol, which
1636 indicates to the C program that the vprintf() routine is available
1637 to printf with a pointer to an argument list.
1639 d_wait4 (d_wait4.U):
1640 This variable conditionally defines the HAS_WAIT4 symbol, which
1641 indicates the wait4() routine is available.
1643 d_waitpid (d_waitpid.U):
1644 This variable conditionally defines HAS_WAITPID if waitpid() is
1645 available to wait for child process.
1647 d_wcstombs (d_wcstombs.U):
1648 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1649 indicates to the C program that the wcstombs() routine is available
1650 to convert wide character strings to multibyte strings.
1652 d_wctomb (d_wctomb.U):
1653 This variable conditionally defines the HAS_WCTOMB symbol, which
1654 indicates to the C program that the wctomb() routine is available
1655 to convert a wide character to a multibyte.
1658 This variable conditionally defines the symbol XENIX, which alerts
1659 the C program that it runs under Xenix.
1662 This variable is used internally by Configure to determine the
1663 full pathname (if any) of the date program. After Configure runs,
1664 the value is reset to a plain "date" and is not useful.
1666 db_hashtype (i_db.U):
1667 This variable contains the type of the hash structure element
1668 in the <db.h> header file. In older versions of DB, it was
1669 int, while in newer ones it is u_int32_t.
1671 db_prefixtype (i_db.U):
1672 This variable contains the type of the prefix structure element
1673 in the <db.h> header file. In older versions of DB, it was
1674 int, while in newer ones it is size_t.
1676 defvoidused (voidflags.U):
1677 This variable contains the default value of the VOIDUSED symbol (15).
1679 direntrytype (i_dirent.U):
1680 This symbol is set to 'struct direct' or 'struct dirent' depending on
1681 whether dirent is available or not. You should use this pseudo type to
1682 portably declare your directory entries.
1685 This variable contains the extension that is to be used for the
1686 dynamically loaded modules that perl generaties.
1689 This variable contains the name of the dynamic loading file that
1690 will be used with the package.
1692 doublesize (doublesize.U):
1693 This variable contains the value of the DOUBLESIZE symbol, which
1694 indicates to the C program how many bytes there are in a double.
1696 drand01 (randfunc.U):
1697 Indicates the macro to be used to generate normalized
1698 random numbers. Uses randfunc, often divided by
1699 (double) (((unsigned long) 1 << randbits)) in order to
1700 normalize the result.
1701 In C programs, the macro 'Drand01' is mapped to drand01.
1703 dynamic_ext (Extensions.U):
1704 This variable holds a list of XS extension files we want to
1705 link dynamically into the package. It is used by Makefile.
1707 eagain (nblock_io.U):
1708 This variable bears the symbolic errno code set by read() when no
1709 data is present on the file and non-blocking I/O was enabled (otherwise,
1710 read() blocks naturally).
1713 This variable conditionally defines EBCDIC if this
1714 system uses EBCDIC encoding. Among other things, this
1715 means that the character ranges are not contiguous.
1719 This variable is used internally by Configure to determine the
1720 full pathname (if any) of the echo program. After Configure runs,
1721 the value is reset to a plain "echo" and is not useful.
1724 This variable is used internally by Configure to determine the
1725 full pathname (if any) of the egrep program. After Configure runs,
1726 the value is reset to a plain "egrep" and is not useful.
1729 This variable is defined but not used by Configure.
1730 The value is a plain '' and is not useful.
1733 When running under Eunice this variable contains a command which will
1734 convert a shell script to the proper form of text file for it to be
1735 executable by the shell. On other systems it is a no-op.
1738 This is an old synonym for _exe.
1741 This variable is used internally by Configure to determine the
1742 full pathname (if any) of the expr program. After Configure runs,
1743 the value is reset to a plain "expr" and is not useful.
1745 extensions (Extensions.U):
1746 This variable holds a list of all extension files (both XS and
1747 non-xs linked into the package. It is propagated to Config.pm
1748 and is typically used to test whether a particular extesion
1751 fflushall (fflushall.U):
1752 This symbol, if defined, tells that to flush
1753 all pending stdio output one must loop through all
1754 the stdio file handles stored in an array and fflush them.
1755 Note that if fflushNULL is defined, fflushall will not
1756 even be probed for and will be left undefined.
1758 fflushNULL (fflushall.U):
1759 This symbol, if defined, tells that fflush(NULL) does flush
1760 all pending stdio output.
1763 This variable is defined but not used by Configure.
1764 The value is a plain '' and is not useful.
1766 firstmakefile (Unix.U):
1767 This variable defines the first file searched by make. On unix,
1768 it is makefile (then Makefile). On case-insensitive systems,
1769 it might be something else. This is only used to deal with
1770 convoluted make depend tricks.
1773 This variable is defined but not used by Configure.
1774 The value is a plain '' and is not useful.
1776 fpossize (fpossize.U):
1777 This variable contains the size of a fpostype in bytes.
1779 fpostype (fpostype.U):
1780 This variable defines Fpos_t to be something like fpos_t, long,
1781 uint, or whatever type is used to declare file positions in libc.
1783 freetype (mallocsrc.U):
1784 This variable contains the return type of free(). It is usually
1785 void, but occasionally int.
1788 This variable contains the full pathname to 'ar', whether or
1789 not the user has specified 'portability'. This is only used
1793 This variable contains the full pathname to 'csh', whether or
1794 not the user has specified 'portability'. This is only used
1795 in the compiled C program, and we assume that all systems which
1796 can share this executable will have the same full pathname to
1799 full_sed (Loc_sed.U):
1800 This variable contains the full pathname to 'sed', whether or
1801 not the user has specified 'portability'. This is only used
1802 in the compiled C program, and we assume that all systems which
1803 can share this executable will have the same full pathname to
1807 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1808 indicate whether the compiler is version 1 or 2. This is used in
1809 setting some of the default cflags. It is set to '' if not gcc.
1812 This variable contains the format string used for printing a Gid_t.
1814 gidsign (gidsign.U):
1815 This variable contains the signedness of a gidtype.
1816 1 for unsigned, -1 for signed.
1818 gidsize (gidsize.U):
1819 This variable contains the size of a gidtype in bytes.
1821 gidtype (gidtype.U):
1822 This variable defines Gid_t to be something like gid_t, int,
1823 ushort, or whatever type is used to declare the return type
1824 of getgid(). Typically, it is the type of group ids in the kernel.
1827 This variable holds the general path (space-separated) used to
1828 find libraries. It may contain directories that do not exist on
1829 this platform, libpth is the cleaned-up version.
1832 This variable is used internally by Configure to determine the
1833 full pathname (if any) of the grep program. After Configure runs,
1834 the value is reset to a plain "grep" and is not useful.
1837 This variable contains a command that produces the text of the
1838 /etc/group file. This is normally "cat /etc/group", but can be
1839 "ypcat group" when NIS is used.
1840 On some systems, such as os390, there may be no equivalent
1841 command, in which case this variable is unset.
1843 groupstype (groupstype.U):
1844 This variable defines Groups_t to be something like gid_t, int,
1845 ushort, or whatever type is used for the second argument to
1846 getgroups() and setgroups(). Usually, this is the same as
1847 gidtype (gid_t), but sometimes it isn't.
1850 This variable is used internally by Configure to determine the
1851 full pathname (if any) of the gzip program. After Configure runs,
1852 the value is reset to a plain "gzip" and is not useful.
1854 h_fcntl (h_fcntl.U):
1855 This is variable gets set in various places to tell i_fcntl that
1856 <fcntl.h> should be included.
1858 h_sysfile (h_sysfile.U):
1859 This is variable gets set in various places to tell i_sys_file that
1860 <sys/file.h> should be included.
1863 Gives the type of hints used for previous answers. May be one of
1864 "default", "recommended" or "previous".
1867 This variable contains a command that produces the text of the
1868 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1869 "ypcat hosts" when NIS is used.
1870 On some systems, such as os390, there may be no equivalent
1871 command, in which case this variable is unset.
1874 This variable contains a flag which will tell the C compiler and loader
1875 to produce a program running with a huge memory model. If the
1876 huge model is not supported, contains the flag to produce large
1877 model programs. It is up to the Makefile to use this.
1880 This variable is the size of an I16 in bytes.
1883 This variable contains the C type used for Perl's I16.
1886 This variable is the size of an I32 in bytes.
1889 This variable contains the C type used for Perl's I32.
1892 This variable is the size of an I64 in bytes.
1895 This variable contains the C type used for Perl's I64.
1898 This variable is the size of an I8 in bytes.
1901 This variable contains the C type used for Perl's I8.
1903 i_arpainet (i_arpainet.U):
1904 This variable conditionally defines the I_ARPA_INET symbol,
1905 and indicates whether a C program should include <arpa/inet.h>.
1907 i_bsdioctl (i_sysioctl.U):
1908 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1909 indicates to the C program that <sys/bsdioctl.h> exists and should
1913 This variable conditionally defines the I_DB symbol, and indicates
1914 whether a C program may include Berkeley's DB include file <db.h>.
1917 This variable conditionally defines the I_DBM symbol, which
1918 indicates to the C program that <dbm.h> exists and should
1921 i_dirent (i_dirent.U):
1922 This variable conditionally defines I_DIRENT, which indicates
1923 to the C program that it should include <dirent.h>.
1926 This variable conditionally defines the I_DLD symbol, which
1927 indicates to the C program that <dld.h> (GNU dynamic loading)
1928 exists and should be included.
1930 i_dlfcn (i_dlfcn.U):
1931 This variable conditionally defines the I_DLFCN symbol, which
1932 indicates to the C program that <dlfcn.h> exists and should
1935 i_fcntl (i_fcntl.U):
1936 This variable controls the value of I_FCNTL (which tells
1937 the C program to include <fcntl.h>).
1939 i_float (i_float.U):
1940 This variable conditionally defines the I_FLOAT symbol, and indicates
1941 whether a C program may include <float.h> to get symbols like DBL_MAX
1942 or DBL_MIN, i.e. machine dependent floating point values.
1945 This variable conditionally defines the I_GDBM symbol, which
1946 indicates to the C program that <gdbm.h> exists and should
1950 This variable conditionally defines the I_GRP symbol, and indicates
1951 whether a C program should include <grp.h>.
1953 i_iconv (i_iconv.U):
1954 This variable conditionally defines the I_ICONV symbol, and indicates
1955 whether a C program should include <iconv.h>.
1957 i_ieeefp (i_ieeefp.U):
1958 This variable conditionally defines the I_IEEEFP symbol, and indicates
1959 whether a C program should include <ieeefp.h>.
1961 i_inttypes (i_inttypes.U):
1962 This variable conditionally defines the I_INTTYPES symbol,
1963 and indicates whether a C program should include <inttypes.h>.
1965 i_limits (i_limits.U):
1966 This variable conditionally defines the I_LIMITS symbol, and indicates
1967 whether a C program may include <limits.h> to get symbols like WORD_BIT
1970 i_locale (i_locale.U):
1971 This variable conditionally defines the I_LOCALE symbol,
1972 and indicates whether a C program should include <locale.h>.
1974 i_machcthr (i_machcthr.U):
1975 This variable conditionally defines the I_MACH_CTHREADS symbol,
1976 and indicates whether a C program should include <mach/cthreads.h>.
1978 i_malloc (i_malloc.U):
1979 This variable conditionally defines the I_MALLOC symbol, and indicates
1980 whether a C program should include <malloc.h>.
1983 This variable conditionally defines the I_MATH symbol, and indicates
1984 whether a C program may include <math.h>.
1986 i_memory (i_memory.U):
1987 This variable conditionally defines the I_MEMORY symbol, and indicates
1988 whether a C program should include <memory.h>.
1990 i_mntent (i_mntent.U):
1991 This variable conditionally defines the I_MNTENT symbol, and indicates
1992 whether a C program should include <mntent.h>.
1995 This variable conditionally defines the I_NDBM symbol, which
1996 indicates to the C program that <ndbm.h> exists and should
1999 i_netdb (i_netdb.U):
2000 This variable conditionally defines the I_NETDB symbol, and indicates
2001 whether a C program should include <netdb.h>.
2003 i_neterrno (i_neterrno.U):
2004 This variable conditionally defines the I_NET_ERRNO symbol, which
2005 indicates to the C program that <net/errno.h> exists and should
2008 i_netinettcp (i_netinettcp.U):
2009 This variable conditionally defines the I_NETINET_TCP symbol,
2010 and indicates whether a C program should include <netinet/tcp.h>.
2013 This variable conditionally defines I_NETINET_IN, which indicates
2014 to the C program that it should include <netinet/in.h>. Otherwise,
2015 you may try <sys/in.h>.
2018 This variable conditionally defines the I_POLL symbol, and indicates
2019 whether a C program should include <poll.h>.
2022 This variable conditionally defines the I_PROT symbol, and indicates
2023 whether a C program should include <prot.h>.
2025 i_pthread (i_pthread.U):
2026 This variable conditionally defines the I_PTHREAD symbol,
2027 and indicates whether a C program should include <pthread.h>.
2030 This variable conditionally defines I_PWD, which indicates
2031 to the C program that it should include <pwd.h>.
2033 i_rpcsvcdbm (i_dbm.U):
2034 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2035 indicates to the C program that <rpcsvc/dbm.h> exists and should
2036 be included. Some System V systems might need this instead of <dbm.h>.
2039 This variable conditionally defines the I_SFIO symbol,
2040 and indicates whether a C program should include <sfio.h>.
2042 i_sgtty (i_termio.U):
2043 This variable conditionally defines the I_SGTTY symbol, which
2044 indicates to the C program that it should include <sgtty.h> rather
2047 i_shadow (i_shadow.U):
2048 This variable conditionally defines the I_SHADOW symbol, and indicates
2049 whether a C program should include <shadow.h>.
2051 i_socks (i_socks.U):
2052 This variable conditionally defines the I_SOCKS symbol, and indicates
2053 whether a C program should include <socks.h>.
2055 i_stdarg (i_varhdr.U):
2056 This variable conditionally defines the I_STDARG symbol, which
2057 indicates to the C program that <stdarg.h> exists and should
2060 i_stddef (i_stddef.U):
2061 This variable conditionally defines the I_STDDEF symbol, which
2062 indicates to the C program that <stddef.h> exists and should
2065 i_stdlib (i_stdlib.U):
2066 This variable conditionally defines the I_STDLIB symbol, which
2067 indicates to the C program that <stdlib.h> exists and should
2070 i_string (i_string.U):
2071 This variable conditionally defines the I_STRING symbol, which
2072 indicates that <string.h> should be included rather than <strings.h>.
2074 i_sunmath (i_sunmath.U):
2075 This variable conditionally defines the I_SUNMATH symbol, and indicates
2076 whether a C program should include <sunmath.h>.
2078 i_sysaccess (i_sysaccess.U):
2079 This variable conditionally defines the I_SYS_ACCESS symbol,
2080 and indicates whether a C program should include <sys/access.h>.
2082 i_sysdir (i_sysdir.U):
2083 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2084 whether a C program should include <sys/dir.h>.
2086 i_sysfile (i_sysfile.U):
2087 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2088 whether a C program should include <sys/file.h> to get R_OK and friends.
2090 i_sysfilio (i_sysioctl.U):
2091 This variable conditionally defines the I_SYS_FILIO symbol, which
2092 indicates to the C program that <sys/filio.h> exists and should
2093 be included in preference to <sys/ioctl.h>.
2096 This variable conditionally defines I_SYS_IN, which indicates
2097 to the C program that it should include <sys/in.h> instead of
2100 i_sysioctl (i_sysioctl.U):
2101 This variable conditionally defines the I_SYS_IOCTL symbol, which
2102 indicates to the C program that <sys/ioctl.h> exists and should
2105 i_syslog (i_syslog.U):
2106 This variable conditionally defines the I_SYSLOG symbol,
2107 and indicates whether a C program should include <syslog.h>.
2109 i_sysmman (i_sysmman.U):
2110 This variable conditionally defines the I_SYS_MMAN symbol, and
2111 indicates whether a C program should include <sys/mman.h>.
2113 i_sysmode (i_sysmode.U):
2114 This variable conditionally defines the I_SYSMODE symbol,
2115 and indicates whether a C program should include <sys/mode.h>.
2117 i_sysmount (i_sysmount.U):
2118 This variable conditionally defines the I_SYSMOUNT symbol,
2119 and indicates whether a C program should include <sys/mount.h>.
2121 i_sysndir (i_sysndir.U):
2122 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2123 whether a C program should include <sys/ndir.h>.
2125 i_sysparam (i_sysparam.U):
2126 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2127 whether a C program should include <sys/param.h>.
2129 i_sysresrc (i_sysresrc.U):
2130 This variable conditionally defines the I_SYS_RESOURCE symbol,
2131 and indicates whether a C program should include <sys/resource.h>.
2133 i_syssecrt (i_syssecrt.U):
2134 This variable conditionally defines the I_SYS_SECURITY symbol,
2135 and indicates whether a C program should include <sys/security.h>.
2137 i_sysselct (i_sysselct.U):
2138 This variable conditionally defines I_SYS_SELECT, which indicates
2139 to the C program that it should include <sys/select.h> in order to
2140 get the definition of struct timeval.
2142 i_syssockio (i_sysioctl.U):
2143 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2144 C program that socket ioctl codes may be found in <sys/sockio.h>
2145 instead of <sys/ioctl.h>.
2147 i_sysstat (i_sysstat.U):
2148 This variable conditionally defines the I_SYS_STAT symbol,
2149 and indicates whether a C program should include <sys/stat.h>.
2151 i_sysstatfs (i_sysstatfs.U):
2152 This variable conditionally defines the I_SYSSTATFS symbol,
2153 and indicates whether a C program should include <sys/statfs.h>.
2155 i_sysstatvfs (i_sysstatvfs.U):
2156 This variable conditionally defines the I_SYSSTATVFS symbol,
2157 and indicates whether a C program should include <sys/statvfs.h>.
2159 i_systime (i_time.U):
2160 This variable conditionally defines I_SYS_TIME, which indicates
2161 to the C program that it should include <sys/time.h>.
2163 i_systimek (i_time.U):
2164 This variable conditionally defines I_SYS_TIME_KERNEL, which
2165 indicates to the C program that it should include <sys/time.h>
2166 with KERNEL defined.
2168 i_systimes (i_systimes.U):
2169 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2170 whether a C program should include <sys/times.h>.
2172 i_systypes (i_systypes.U):
2173 This variable conditionally defines the I_SYS_TYPES symbol,
2174 and indicates whether a C program should include <sys/types.h>.
2176 i_sysuio (i_sysuio.U):
2177 This variable conditionally defines the I_SYSUIO symbol, and indicates
2178 whether a C program should include <sys/uio.h>.
2180 i_sysun (i_sysun.U):
2181 This variable conditionally defines I_SYS_UN, which indicates
2182 to the C program that it should include <sys/un.h> to get UNIX
2183 domain socket definitions.
2185 i_sysutsname (i_sysutsname.U):
2186 This variable conditionally defines the I_SYSUTSNAME symbol,
2187 and indicates whether a C program should include <sys/utsname.h>.
2189 i_sysvfs (i_sysvfs.U):
2190 This variable conditionally defines the I_SYSVFS symbol,
2191 and indicates whether a C program should include <sys/vfs.h>.
2193 i_syswait (i_syswait.U):
2194 This variable conditionally defines I_SYS_WAIT, which indicates
2195 to the C program that it should include <sys/wait.h>.
2197 i_termio (i_termio.U):
2198 This variable conditionally defines the I_TERMIO symbol, which
2199 indicates to the C program that it should include <termio.h> rather
2202 i_termios (i_termio.U):
2203 This variable conditionally defines the I_TERMIOS symbol, which
2204 indicates to the C program that the POSIX <termios.h> file is
2208 This variable conditionally defines I_TIME, which indicates
2209 to the C program that it should include <time.h>.
2211 i_unistd (i_unistd.U):
2212 This variable conditionally defines the I_UNISTD symbol, and indicates
2213 whether a C program should include <unistd.h>.
2215 i_ustat (i_ustat.U):
2216 This variable conditionally defines the I_USTAT symbol, and indicates
2217 whether a C program should include <ustat.h>.
2219 i_utime (i_utime.U):
2220 This variable conditionally defines the I_UTIME symbol, and indicates
2221 whether a C program should include <utime.h>.
2223 i_values (i_values.U):
2224 This variable conditionally defines the I_VALUES symbol, and indicates
2225 whether a C program may include <values.h> to get symbols like MAXLONG
2228 i_varargs (i_varhdr.U):
2229 This variable conditionally defines I_VARARGS, which indicates
2230 to the C program that it should include <varargs.h>.
2232 i_varhdr (i_varhdr.U):
2233 Contains the name of the header to be included to get va_dcl definition.
2234 Typically one of varargs.h or stdarg.h.
2236 i_vfork (i_vfork.U):
2237 This variable conditionally defines the I_VFORK symbol, and indicates
2238 whether a C program should include vfork.h.
2240 ignore_versioned_solibs (libs.U):
2241 This variable should be non-empty if non-versioned shared
2242 libraries (libfoo.so.x.y) are to be ignored (because they
2243 cannot be linked against).
2245 inc_version_list (inc_version_list.U):
2246 This variable specifies the list of subdirectories in over
2247 which perl.c:incpush() and lib/lib.pm will automatically
2248 search when adding directories to @INC. The elements in
2249 the list are separated by spaces. This is only useful
2250 if you have a perl library directory tree structured like the
2251 default one. See INSTALL for how this works. The versioned
2252 site_perl directory was introduced in 5.005, so that is the
2253 lowest possible value.
2255 inc_version_list_init (inc_version_list.U):
2256 This variable holds the same list as inc_version_list, but
2257 each item is enclosed in double quotes and separated by commas,
2258 suitable for use in the PERL_INC_VERSION_LIST initialization.
2261 This variable must preceed the normal include path to get hte
2262 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2263 Value can be "" or "/bsd43" on mips.
2266 This variable is defined but not used by Configure.
2267 The value is a plain '' and is not useful.
2269 installarchlib (archlib.U):
2270 This variable is really the same as archlibexp but may differ on
2271 those systems using AFS. For extra portability, only this variable
2272 should be used in makefiles.
2275 This variable is the same as binexp unless AFS is running in which case
2276 the user is explicitely prompted for it. This variable should always
2277 be used in your makefiles for maximum portability.
2279 installman1dir (man1dir.U):
2280 This variable is really the same as man1direxp, unless you are using
2281 AFS in which case it points to the read/write location whereas
2282 man1direxp only points to the read-only access location. For extra
2283 portability, you should only use this variable within your makefiles.
2285 installman3dir (man3dir.U):
2286 This variable is really the same as man3direxp, unless you are using
2287 AFS in which case it points to the read/write location whereas
2288 man3direxp only points to the read-only access location. For extra
2289 portability, you should only use this variable within your makefiles.
2291 installprefix (installprefix.U):
2292 This variable holds the name of the directory below which
2293 "make install" will install the package. For most users, this
2294 is the same as prefix. However, it is useful for
2295 installing the software into a different (usually temporary)
2296 location after which it can be bundled up and moved somehow
2297 to the final location specified by prefix.
2299 installprefixexp (installprefix.U):
2300 This variable holds the full absolute path of installprefix
2301 with all ~-expansion done.
2303 installprivlib (privlib.U):
2304 This variable is really the same as privlibexp but may differ on
2305 those systems using AFS. For extra portability, only this variable
2306 should be used in makefiles.
2308 installscript (scriptdir.U):
2309 This variable is usually the same as scriptdirexp, unless you are on
2310 a system running AFS, in which case they may differ slightly. You
2311 should always use this variable within your makefiles for portability.
2313 installsitearch (sitearch.U):
2314 This variable is really the same as sitearchexp but may differ on
2315 those systems using AFS. For extra portability, only this variable
2316 should be used in makefiles.
2318 installsitebin (sitebin.U):
2319 This variable is usually the same as sitebinexp, unless you are on
2320 a system running AFS, in which case they may differ slightly. You
2321 should always use this variable within your makefiles for portability.
2323 installsitelib (sitelib.U):
2324 This variable is really the same as sitelibexp but may differ on
2325 those systems using AFS. For extra portability, only this variable
2326 should be used in makefiles.
2328 installstyle (installstyle.U):
2329 This variable describes the "style" of the perl installation.
2330 This is intended to be useful for tools that need to
2331 manipulate entire perl distributions. Perl itself doesn't use
2332 this to find its libraries -- the library directories are
2333 stored directly in Config.pm. Currently, there are only two
2334 styles: "lib" and "lib/perl5". The default library locations
2335 (e.g. privlib, sitelib) are either $prefix/lib or
2336 $prefix/lib/perl5. The former is useful if $prefix is a
2337 directory dedicated to perl (e.g. /opt/perl), while the latter
2338 is useful if $prefix is shared by many packages, e.g. if
2340 This may later be extended to include other information, so
2341 be careful with pattern-matching on the results.
2342 For compatibility with perl5.005 and earlier, the default
2343 setting is based on whether or not $prefix contains the string
2346 installusrbinperl (instubperl.U):
2347 This variable tells whether Perl should be installed also as
2348 /usr/bin/perl in addition to
2351 installvendorarch (vendorarch.U):
2352 This variable is really the same as vendorarchexp but may differ on
2353 those systems using AFS. For extra portability, only this variable
2354 should be used in makefiles.
2356 installvendorbin (vendorbin.U):
2357 This variable is really the same as vendorbinexp but may differ on
2358 those systems using AFS. For extra portability, only this variable
2359 should be used in makefiles.
2361 installvendorlib (vendorlib.U):
2362 This variable is really the same as vendorlibexp but may differ on
2363 those systems using AFS. For extra portability, only this variable
2364 should be used in makefiles.
2366 intsize (intsize.U):
2367 This variable contains the value of the INTSIZE symbol, which
2368 indicates to the C program how many bytes there are in an int.
2370 ivdformat (perlxvf.U):
2371 This variable contains the format string used for printing
2372 a Perl IV as a signed decimal integer.
2375 This variable is the size of an IV in bytes.
2378 This variable contains the C type used for Perl's IV.
2380 known_extensions (Extensions.U):
2381 This variable holds a list of all XS extensions included in
2385 This variable is defined but not used by Configure.
2386 The value is a plain '' and is not useful.
2389 This variable contains a flag which will tell the C compiler and loader
2390 to produce a program running with a large memory model. It is up to
2391 the Makefile to use this.
2394 This variable indicates the program to be used to link
2395 libraries for dynamic loading. On some systems, it is 'ld'.
2396 On ELF systems, it should be $cc. Mostly, we'll try to respect
2397 the hint file setting.
2399 lddlflags (dlsrc.U):
2400 This variable contains any special flags that might need to be
2401 passed to $ld to create a shared library suitable for dynamic
2402 loading. It is up to the makefile to use it. For hpux, it
2403 should be '-b'. For sunos 4.1, it is empty.
2405 ldflags (ccflags.U):
2406 This variable contains any additional C loader flags desired by
2407 the user. It is up to the Makefile to use this.
2409 ldlibpthname (libperl.U):
2410 This variable holds the name of the shared library
2411 search path, often LD_LIBRARY_PATH. To get an empty
2412 string, the hints file must set this to 'none'.
2415 This variable is used internally by Configure to determine the
2416 full pathname (if any) of the less program. After Configure runs,
2417 the value is reset to a plain "less" and is not useful.
2420 This is an old synonym for _a.
2423 This variable contains the location of the C library.
2425 libperl (libperl.U):
2426 The perl executable is obtained by linking perlmain.c with
2427 libperl, any static extensions (usually just DynaLoader),
2428 and any other libraries needed on this system. libperl
2429 is usually libperl.a, but can also be libperl.so.xxx if
2430 the user wishes to build a perl executable with a shared
2434 This variable holds the general path (space-separated) used to find
2435 libraries. It is intended to be used by other units.
2438 This variable holds the additional libraries we want to use.
2439 It is up to the Makefile to deal with it.
2442 This variable holds the directory names aka dirnames of the libraries
2443 we found and accepted, duplicates are removed.
2446 This variable holds the filenames aka basenames of the libraries
2447 we found and accepted.
2450 This variable holds the full pathnames of the libraries
2451 we found and accepted.
2454 This variable holds the directory names probed for libraries.
2456 libswanted (Myinit.U):
2457 This variable holds a list of all the libraries we want to
2458 search. The order is chosen to pick up the c library
2459 ahead of ucb or bsd libraries for SVR4.
2462 This variable is defined but not used by Configure.
2463 The value is a plain '' and is not useful.
2466 This variable is defined but not used by Configure.
2467 The value is a plain '' and is not useful.
2469 lkflags (ccflags.U):
2470 This variable contains any additional C partial linker flags desired by
2471 the user. It is up to the Makefile to use this.
2474 This variable is used internally by Configure to determine the
2475 full pathname (if any) of the ln program. After Configure runs,
2476 the value is reset to a plain "ln" and is not useful.
2479 This variable holds the name of the command to make
2480 symbolic links (if they are supported). It can be used
2481 in the Makefile. It is either 'ln -s' or 'ln'
2483 locincpth (ccflags.U):
2484 This variable contains a list of additional directories to be
2485 searched by the compiler. The appropriate '-I' directives will
2486 be added to ccflags. This is intended to simplify setting
2487 local directories from the Configure command line.
2488 It's not much, but it parallels the loclibpth stuff in libpth.U.
2490 loclibpth (libpth.U):
2491 This variable holds the paths (space-separated) used to find local
2492 libraries. It is prepended to libpth, and is intended to be easily
2493 set from the command line.
2495 longdblsize (d_longdbl.U):
2496 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2497 indicates to the C program how many bytes there are in a long double,
2498 if this system supports long doubles.
2500 longlongsize (d_longlong.U):
2501 This variable contains the value of the LONGLONGSIZE symbol, which
2502 indicates to the C program how many bytes there are in a long long,
2503 if this system supports long long.
2505 longsize (intsize.U):
2506 This variable contains the value of the LONGSIZE symbol, which
2507 indicates to the C program how many bytes there are in a long.
2510 This variable is defined but not used by Configure.
2511 The value is a plain '' and is not useful.
2514 This variable is defined but not used by Configure.
2515 The value is a plain '' and is not useful.
2518 This variable is used internally by Configure to determine the
2519 full pathname (if any) of the ls program. After Configure runs,
2520 the value is reset to a plain "ls" and is not useful.
2522 lseeksize (lseektype.U):
2523 This variable defines lseektype to be something like off_t, long,
2524 or whatever type is used to declare lseek offset's type in the
2525 kernel (which also appears to be lseek's return type).
2527 lseektype (lseektype.U):
2528 This variable defines lseektype to be something like off_t, long,
2529 or whatever type is used to declare lseek offset's type in the
2530 kernel (which also appears to be lseek's return type).
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.
2541 This variable is used internally by Configure to determine the
2542 full pathname (if any) of the make program. After Configure runs,
2543 the value is reset to a plain "make" and is not useful.
2545 make_set_make (make.U):
2546 Some versions of 'make' set the variable MAKE. Others do not.
2547 This variable contains the string to be included in Makefile.SH
2548 so that MAKE is set if needed, and not if not needed.
2549 Possible values are:
2550 make_set_make='#' # If your make program handles this for you,
2551 make_set_make="MAKE=$make" # if it doesn't.
2552 I used a comment character so that we can distinguish a
2553 'set' value (from a previous config.sh or Configure '-D' option)
2554 from an uncomputed value.
2556 mallocobj (mallocsrc.U):
2557 This variable contains the name of the malloc.o that this package
2558 generates, if that malloc.o is preferred over the system malloc.
2559 Otherwise the value is null. This variable is intended for generating
2560 Makefiles. See mallocsrc.
2562 mallocsrc (mallocsrc.U):
2563 This variable contains the name of the malloc.c that comes with
2564 the package, if that malloc.c is preferred over the system malloc.
2565 Otherwise the value is null. This variable is intended for generating
2568 malloctype (mallocsrc.U):
2569 This variable contains the kind of ptr returned by malloc and realloc.
2571 man1dir (man1dir.U):
2572 This variable contains the name of the directory in which manual
2573 source pages are to be put. It is the responsibility of the
2574 Makefile.SH to get the value of this into the proper command.
2575 You must be prepared to do the ~name expansion yourself.
2577 man1direxp (man1dir.U):
2578 This variable is the same as the man1dir variable, but is filename
2579 expanded at configuration time, for convenient use in makefiles.
2581 man1ext (man1dir.U):
2582 This variable contains the extension that the manual page should
2583 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2586 man3dir (man3dir.U):
2587 This variable contains the name of the directory in which manual
2588 source pages are to be put. It is the responsibility of the
2589 Makefile.SH to get the value of this into the proper command.
2590 You must be prepared to do the ~name expansion yourself.
2592 man3direxp (man3dir.U):
2593 This variable is the same as the man3dir variable, but is filename
2594 expanded at configuration time, for convenient use in makefiles.
2596 man3ext (man3dir.U):
2597 This variable contains the extension that the manual page should
2598 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2602 This variable is used internally by Configure to determine the
2603 full pathname (if any) of the Mcc program. After Configure runs,
2604 the value is reset to a plain "Mcc" and is not useful.
2607 This variable contains a flag which will tell the C compiler and loader
2608 to produce a program running with a medium memory model. If the
2609 medium model is not supported, contains the flag to produce large
2610 model programs. It is up to the Makefile to use this.
2612 mips_type (usrinc.U):
2613 This variable holds the environment type for the mips system.
2614 Possible values are "BSD 4.3" and "System V".
2617 This variable is used internally by Configure to determine the
2618 full pathname (if any) of the mkdir program. After Configure runs,
2619 the value is reset to a plain "mkdir" and is not useful.
2621 mmaptype (d_mmap.U):
2622 This symbol contains the type of pointer returned by mmap()
2623 (and simultaneously the type of the first argument).
2624 It can be 'void *' or 'caddr_t'.
2627 This variable contains the list of memory models supported by this
2628 system. Possible component values are none, split, unsplit, small,
2629 medium, large, and huge. The component values are space separated.
2631 modetype (modetype.U):
2632 This variable defines modetype to be something like mode_t,
2633 int, unsigned short, or whatever type is used to declare file
2634 modes for system calls.
2637 This variable is used internally by Configure to determine the
2638 full pathname (if any) of the more program. After Configure runs,
2639 the value is reset to a plain "more" and is not useful.
2641 multiarch (multiarch.U):
2642 This variable conditionally defines the MULTIARCH symbol
2643 which signifies the presence of multiplatform files.
2644 This is normally set by hints files.
2647 This variable is defined but not used by Configure.
2648 The value is a plain '' and is not useful.
2650 myarchname (archname.U):
2651 This variable holds the architecture name computed by Configure in
2652 a previous run. It is not intended to be perused by any user and
2653 should never be set in a hint file.
2655 mydomain (myhostname.U):
2656 This variable contains the eventual value of the MYDOMAIN symbol,
2657 which is the domain of the host the program is going to run on.
2658 The domain must be appended to myhostname to form a complete host name.
2659 The dot comes with mydomain, and need not be supplied by the program.
2661 myhostname (myhostname.U):
2662 This variable contains the eventual value of the MYHOSTNAME symbol,
2663 which is the name of the host the program is going to run on.
2664 The domain is not kept with hostname, but must be gotten from mydomain.
2665 The dot comes with mydomain, and need not be supplied by the program.
2667 myuname (Oldconfig.U):
2668 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2669 pseudo variables assignments in the output are stripped, thank you. The
2670 whole thing is then lower-cased.
2673 This variable contains the '-n' flag if that is what causes the echo
2674 command to suppress newline. Otherwise it is null. Correct usage is
2675 $echo $n "prompt for a question: $c".
2677 netdb_hlen_type (netdbtype.U):
2678 This variable holds the type used for the 2nd argument to
2679 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2680 This is only useful if you have gethostbyaddr(), naturally.
2682 netdb_host_type (netdbtype.U):
2683 This variable holds the type used for the 1st argument to
2684 gethostbyaddr(). Usually, this is char * or void *, possibly
2685 with or without a const prefix.
2686 This is only useful if you have gethostbyaddr(), naturally.
2688 netdb_name_type (netdbtype.U):
2689 This variable holds the type used for the argument to
2690 gethostbyname(). Usually, this is char * or const char *.
2691 This is only useful if you have gethostbyname(), naturally.
2693 netdb_net_type (netdbtype.U):
2694 This variable holds the type used for the 1st argument to
2695 getnetbyaddr(). Usually, this is int or long.
2696 This is only useful if you have getnetbyaddr(), naturally.
2699 This variable is used internally by Configure to determine the
2700 full pathname (if any) of the nm program. After Configure runs,
2701 the value is reset to a plain "nm" and is not useful.
2704 This variable holds the options that may be necessary for nm.
2706 nm_so_opt (usenm.U):
2707 This variable holds the options that may be necessary for nm
2708 to work on a shared library but that can not be used on an
2709 archive library. Currently, this is only used by Linux, where
2710 nm --dynamic is *required* to get symbols from an ELF library which
2711 has been stripped, but nm --dynamic is *fatal* on an archive library.
2712 Maybe Linux should just always set usenm=false.
2714 nonxs_ext (Extensions.U):
2715 This variable holds a list of all non-xs extensions included
2716 in the package. All of them will be built.
2719 This variable is used internally by Configure to determine the
2720 full pathname (if any) of the nroff program. After Configure runs,
2721 the value is reset to a plain "nroff" and is not useful.
2724 This variable is the size of an NV in bytes.
2727 This variable contains the C type used for Perl's NV.
2729 o_nonblock (nblock_io.U):
2730 This variable bears the symbol value to be used during open() or fcntl()
2731 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2732 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2733 but that is only supported by some devices.
2736 This is an old synonym for _o.
2738 old_pthread_create_joinable (d_pthrattrj.U):
2739 This variable defines the constant to use for creating joinable
2740 (aka undetached) pthreads. Unused if pthread.h defines
2741 PTHREAD_CREATE_JOINABLE. If used, possible values are
2742 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2744 optimize (ccflags.U):
2745 This variable contains any optimizer/debugger flag that should be used.
2746 It is up to the Makefile to use it.
2748 orderlib (orderlib.U):
2749 This variable is "true" if the components of libraries must be ordered
2750 (with `lorder $* | tsort`) before placing them in an archive. Set to
2751 "false" if ranlib or ar can generate random libraries.
2753 osname (Oldconfig.U):
2754 This variable contains the operating system name (e.g. sunos,
2755 solaris, hpux, etc.). It can be useful later on for setting
2756 defaults. Any spaces are replaced with underscores. It is set
2757 to a null string if we can't figure it out.
2759 osvers (Oldconfig.U):
2760 This variable contains the operating system version (e.g.
2761 4.1.3, 5.2, etc.). It is primarily used for helping select
2762 an appropriate hints file, but might be useful elsewhere for
2763 setting defaults. It is set to '' if we can't figure it out.
2764 We try to be flexible about how much of the version number
2765 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2766 same for this package, hints files might just be os_4.0 or
2767 os_4.1, etc., not keeping separate files for each little release.
2769 otherlibdirs (otherlibdirs.U):
2770 This variable contains a colon-separated set of paths for the perl
2771 binary to search for additional library files or modules.
2772 These directories will be tacked to the end of @INC.
2773 Perl will automatically search below each path for version-
2774 and architecture-specific directories. See inc_version_list
2776 A value of ' ' means 'none' and is used to preserve this value
2777 for the next run through Configure.
2779 package (package.U):
2780 This variable contains the name of the package being constructed.
2781 It is primarily intended for the use of later Configure units.
2784 This variable contains the name of the preferred pager on the system.
2785 Usual values are (the full pathnames of) more, less, pg, or cat.
2788 This variable contains a command that produces the text of the
2789 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2790 "ypcat passwd" when NIS is used.
2791 On some systems, such as os390, there may be no equivalent
2792 command, in which case this variable is unset.
2794 patchlevel (patchlevel.U):
2795 The patchlevel level of this package.
2796 The value of patchlevel comes from the patchlevel.h file.
2797 In a version number such as 5.6.1, this is the "6".
2798 In patchlevel.h, this is referred to as "PERL_VERSION".
2801 This is an old synonym for p_ in Head.U, the character
2802 used to separate elements in the command shell search PATH.
2805 This variable contains the full path (if any) to a previously
2806 installed perl5.005 or later suitable for running the script
2807 to determine inc_version_list.
2810 This variable is defined but not used by Configure.
2811 The value is a plain '' and is not useful.
2813 PERL_REVISION (Oldsyms.U):
2814 In a Perl version number such as 5.6.2, this is the 5.
2815 This value is manually set in patchlevel.h
2817 PERL_SUBVERSION (Oldsyms.U):
2818 In a Perl version number such as 5.6.2, this is the 2.
2819 Values greater than 50 represent potentially unstable
2820 development subversions.
2821 This value is manually set in patchlevel.h
2823 PERL_VERSION (Oldsyms.U):
2824 In a Perl version number such as 5.6.2, this is the 6.
2825 This value is manually set in patchlevel.h
2827 perladmin (perladmin.U):
2828 Electronic mail address of the perl5 administrator.
2830 perlpath (perlpath.U):
2831 This variable contains the eventual value of the PERLPATH symbol,
2832 which contains the name of the perl interpreter to be used in
2833 shell scripts and in the "eval 'exec'" idiom.
2836 This variable is used internally by Configure to determine the
2837 full pathname (if any) of the pg program. After Configure runs,
2838 the value is reset to a plain "pg" and is not useful.
2840 phostname (myhostname.U):
2841 This variable contains the eventual value of the PHOSTNAME symbol,
2842 which is a command that can be fed to popen() to get the host name.
2843 The program should probably not presume that the domain is or isn't
2846 pidtype (pidtype.U):
2847 This variable defines PIDTYPE to be something like pid_t, int,
2848 ushort, or whatever type is used to declare process ids in the kernel.
2851 Holds the private path used by Configure to find out the libraries.
2852 Its value is prepend to libpth. This variable takes care of special
2853 machines, like the mips. Usually, it should be empty.
2855 pm_apiversion (xs_apiversion.U):
2856 This variable contains the version of the oldest perl
2857 compatible with the present perl. (That is, pure perl modules
2858 written for $pm_apiversion will still work for the current
2859 version). perl.c:incpush() and lib/lib.pm will automatically
2860 search in $sitelib for older directories across major versions
2861 back to pm_apiversion. This is only useful if you have a perl
2862 library directory tree structured like the default one. The
2863 versioned site_perl library was introduced in 5.005, so that's
2864 the default setting for this variable. It's hard to imagine
2865 it changing before Perl6. It is included here for symmetry
2866 with xs_apiveprsion -- the searching algorithms will
2867 (presumably) be similar.
2868 See the INSTALL file for how this works.
2871 This variable is defined but not used by Configure.
2872 The value is a plain '' and is not useful.
2875 This variable is defined but not used by Configure.
2876 The value is a plain '' and is not useful.
2879 This variable holds the name of the directory below which the
2880 user will install the package. Usually, this is /usr/local, and
2881 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2882 man pages in /usr/local/man, etc. It is only used to set defaults
2883 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2885 prefixexp (prefix.U):
2886 This variable holds the full absolute path of the directory below
2887 which the user will install the package. Derived from prefix.
2889 privlib (privlib.U):
2890 This variable contains the eventual value of the PRIVLIB symbol,
2891 which is the name of the private library for this package. It may
2892 have a ~ on the front. It is up to the makefile to eventually create
2893 this directory while performing installation (with ~ substitution).
2895 privlibexp (privlib.U):
2896 This variable is the ~name expanded version of privlib, so that you
2897 may use it directly in Makefiles or shell scripts.
2899 prototype (prototype.U):
2900 This variable holds the eventual value of CAN_PROTOTYPE, which
2901 indicates the C compiler can handle funciton prototypes.
2903 ptrsize (ptrsize.U):
2904 This variable contains the value of the PTRSIZE symbol, which
2905 indicates to the C program how many bytes there are in a pointer.
2907 quadkind (quadtype.U):
2908 This variable, if defined, encodes the type of a quad:
2909 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2911 quadtype (quadtype.U):
2912 This variable defines Quad_t to be something like long, int,
2913 long long, int64_t, or whatever type is used for 64-bit integers.
2915 randbits (randfunc.U):
2916 Indicates how many bits are produced by the function used to
2917 generate normalized random numbers.
2919 randfunc (randfunc.U):
2920 Indicates the name of the random number function to use.
2921 Values include drand48, random, and rand. In C programs,
2922 the 'Drand01' macro is defined to generate uniformly distributed
2923 random numbers over the range [0., 1.[ (see drand01 and nrand).
2925 randseedtype (randfunc.U):
2926 Indicates the type of the argument of the seedfunc.
2928 ranlib (orderlib.U):
2929 This variable is set to the pathname of the ranlib program, if it is
2930 needed to generate random libraries. Set to ":" if ar can generate
2931 random libraries or if random libraries are not supported
2933 rd_nodata (nblock_io.U):
2934 This variable holds the return code from read() when no data is
2935 present. It should be -1, but some systems return 0 when O_NDELAY is
2936 used, which is a shame because you cannot make the difference between
2937 no data and an EOF.. Sigh!
2939 revision (patchlevel.U):
2940 The value of revision comes from the patchlevel.h file.
2941 In a version number such as 5.6.1, this is the "5".
2942 In patchlevel.h, this is referred to as "PERL_REVISION".
2945 This variable is used internally by Configure to determine the
2946 full pathname (if any) of the rm program. After Configure runs,
2947 the value is reset to a plain "rm" and is not useful.
2950 This variable is defined but not used by Configure.
2951 The value is a plain '' and is not useful.
2954 This variable contains 'true' or 'false' depending whether the
2955 nm extraction should be performed or not, according to the value
2956 of usenm and the flags on the Configure command line.
2958 sched_yield (d_pthread_y.U):
2959 This variable defines the way to yield the execution
2960 of the current thread.
2962 scriptdir (scriptdir.U):
2963 This variable holds the name of the directory in which the user wants
2964 to put publicly scripts for the package in question. It is either
2965 the same directory as for binaries, or a special one that can be
2966 mounted across different architectures, like /usr/share. Programs
2967 must be prepared to deal with ~name expansion.
2969 scriptdirexp (scriptdir.U):
2970 This variable is the same as scriptdir, but is filename expanded
2971 at configuration time, for programs not wanting to bother with it.
2974 This variable is used internally by Configure to determine the
2975 full pathname (if any) of the sed program. After Configure runs,
2976 the value is reset to a plain "sed" and is not useful.
2978 seedfunc (randfunc.U):
2979 Indicates the random number generating seed function.
2980 Values include srand48, srandom, and srand.
2982 selectminbits (selectminbits.U):
2983 This variable holds the minimum number of bits operated by select.
2984 That is, if you do select(n, ...), how many bits at least will be
2985 cleared in the masks if some activity is detected. Usually this
2986 is either n or 32*ceil(n/32), especially many little-endians do
2987 the latter. This is only useful if you have select(), naturally.
2989 selecttype (selecttype.U):
2990 This variable holds the type used for the 2nd, 3rd, and 4th
2991 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2992 is defined, and 'int *' otherwise. This is only useful if you
2993 have select(), naturally.
2996 This variable is defined but not used by Configure.
2997 The value is a plain '' and is not useful.
3000 This variable contains the full pathname of the shell used
3001 on this system to execute Bourne shell scripts. Usually, this will be
3002 /bin/sh, though it's possible that some systems will have /bin/ksh,
3003 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3005 This unit comes before Options.U, so you can't set sh with a '-D'
3006 option, though you can override this (and startsh)
3007 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3010 This variable is defined but not used by Configure.
3011 The value is a plain '' and is not useful.
3013 sharpbang (spitshell.U):
3014 This variable contains the string #! if this system supports that
3017 shmattype (d_shmat.U):
3018 This symbol contains the type of pointer returned by shmat().
3019 It can be 'void *' or 'char *'.
3021 shortsize (intsize.U):
3022 This variable contains the value of the SHORTSIZE symbol which
3023 indicates to the C program how many bytes there are in a short.
3025 shrpenv (libperl.U):
3026 If the user builds a shared libperl.so, then we need to tell the
3027 'perl' executable where it will be able to find the installed libperl.so.
3028 One way to do this on some systems is to set the environment variable
3029 LD_RUN_PATH to the directory that will be the final location of the
3030 shared libperl.so. The makefile can use this with something like
3031 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3033 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3036 See the main perl Makefile.SH for actual working usage.
3037 Alternatively, we might be able to use a command line option such
3038 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3039 $archlibexp/CORE (Linux).
3041 shsharp (spitshell.U):
3042 This variable tells further Configure units whether your sh can
3045 sig_count (sig_name.U):
3046 This variable holds a number larger than the largest valid
3047 signal number. This is usually the same as the NSIG macro.
3049 sig_name (sig_name.U):
3050 This variable holds the signal names, space separated. The leading
3051 SIG in signal name is removed. A ZERO is prepended to the
3052 list. This is currently not used.
3054 sig_name_init (sig_name.U):
3055 This variable holds the signal names, enclosed in double quotes and
3056 separated by commas, suitable for use in the SIG_NAME definition
3057 below. A "ZERO" is prepended to the list, and the list is
3058 terminated with a plain 0. The leading SIG in signal names
3059 is removed. See sig_num.
3061 sig_num (sig_name.U):
3062 This variable holds the signal numbers, space separated. A ZERO is
3063 prepended to the list (corresponding to the fake SIGZERO), and
3064 the list is terminated with a 0. Those numbers correspond to
3065 the value of the signal listed in the same place within the
3068 sig_num_init (sig_name.U):
3069 This variable holds the signal numbers, enclosed in double quotes and
3070 separated by commas, suitable for use in the SIG_NUM definition
3071 below. A "ZERO" is prepended to the list, and the list is
3072 terminated with a plain 0.
3074 signal_t (d_voidsig.U):
3075 This variable holds the type of the signal handler (void or int).
3077 sitearch (sitearch.U):
3078 This variable contains the eventual value of the SITEARCH symbol,
3079 which is the name of the private library for this package. It may
3080 have a ~ on the front. It is up to the makefile to eventually create
3081 this directory while performing installation (with ~ substitution).
3082 The standard distribution will put nothing in this directory.
3083 After perl has been installed, users may install their own local
3084 architecture-dependent modules in this directory with
3085 MakeMaker Makefile.PL
3086 or equivalent. See INSTALL for details.
3088 sitearchexp (sitearch.U):
3089 This variable is the ~name expanded version of sitearch, so that you
3090 may use it directly in Makefiles or shell scripts.
3092 sitebin (sitebin.U):
3093 This variable holds the name of the directory in which the user wants
3094 to put add-on publicly executable files for the package in question. It
3095 is most often a local directory such as /usr/local/bin. Programs using
3096 this variable must be prepared to deal with ~name substitution.
3097 The standard distribution will put nothing in this directory.
3098 After perl has been installed, users may install their own local
3099 executables in this directory with
3100 MakeMaker Makefile.PL
3101 or equivalent. See INSTALL for details.
3103 sitebinexp (sitebin.U):
3104 This is the same as the sitebin variable, but is filename expanded at
3105 configuration time, for use in your makefiles.
3107 sitelib (sitelib.U):
3108 This variable contains the eventual value of the SITELIB symbol,
3109 which is the name of the private library for this package. It may
3110 have a ~ on the front. It is up to the makefile to eventually create
3111 this directory while performing installation (with ~ substitution).
3112 The standard distribution will put nothing in this directory.
3113 After perl has been installed, users may install their own local
3114 architecture-independent modules in this directory with
3115 MakeMaker Makefile.PL
3116 or equivalent. See INSTALL for details.
3118 sitelib_stem (sitelib.U):
3119 This variable is $sitelibexp with any trailing version-specific component
3120 removed. The elements in inc_version_list (inc_version_list.U) can
3121 be tacked onto this variable to generate a list of directories to search.
3123 sitelibexp (sitelib.U):
3124 This variable is the ~name expanded version of sitelib, so that you
3125 may use it directly in Makefiles or shell scripts.
3127 siteprefix (siteprefix.U):
3128 This variable holds the full absolute path of the directory below
3129 which the user will install add-on packages.
3130 See INSTALL for usage and examples.
3132 siteprefixexp (siteprefix.U):
3133 This variable holds the full absolute path of the directory below
3134 which the user will install add-on packages. Derived from siteprefix.
3136 sizesize (sizesize.U):
3137 This variable contains the size of a sizetype in bytes.
3139 sizetype (sizetype.U):
3140 This variable defines sizetype to be something like size_t,
3141 unsigned long, or whatever type is used to declare length
3142 parameters for string functions.
3145 This variable is defined but not used by Configure.
3146 The value is a plain '' and is not useful.
3149 This variable is defined but not used by Configure.
3150 The value is a plain '' and is not useful.
3153 This variable contains a flag which will tell the C compiler and loader
3154 to produce a program running with a small memory model. It is up to
3155 the Makefile to use this.
3158 This variable holds the extension used to identify shared libraries
3159 (also known as shared objects) on the system. Usually set to 'so'.
3161 sockethdr (d_socket.U):
3162 This variable has any cpp '-I' flags needed for socket support.
3164 socketlib (d_socket.U):
3165 This variable has the names of any libraries needed for socket support.
3167 socksizetype (socksizetype.U):
3168 This variable holds the type used for the size argument
3169 for various socket calls like accept. Usual values include
3170 socklen_t, size_t, and int.
3173 This variable is used internally by Configure to determine the
3174 full pathname (if any) of the sort program. After Configure runs,
3175 the value is reset to a plain "sort" and is not useful.
3177 spackage (package.U):
3178 This variable contains the name of the package being constructed,
3179 with the first letter uppercased, i.e. suitable for starting
3182 spitshell (spitshell.U):
3183 This variable contains the command necessary to spit out a runnable
3184 shell on this system. It is either cat or a grep '-v' for # comments.
3187 This variable contains a flag which will tell the C compiler and loader
3188 to produce a program that will run in separate I and D space, for those
3189 machines that support separation of instruction and data space. It is
3190 up to the Makefile to use this.
3192 sPRId64 (quadfio.U):
3193 This variable, if defined, contains the string used by stdio to
3194 format 64-bit decimal numbers (format 'd') for output.
3196 sPRIeldbl (longdblfio.U):
3197 This variable, if defined, contains the string used by stdio to
3198 format long doubles (format 'e') for output.
3200 sPRIEldbl (longdblfio.U):
3201 This variable, if defined, contains the string used by stdio to
3202 format long doubles (format 'E') for output.
3204 sPRIfldbl (longdblfio.U):
3205 This variable, if defined, contains the string used by stdio to
3206 format long doubles (format 'f') for output.
3208 sPRIFldbl (longdblfio.U):
3209 This variable, if defined, contains the string used by stdio to
3210 format long doubles (format 'F') for output.
3212 sPRIgldbl (longdblfio.U):
3213 This variable, if defined, contains the string used by stdio to
3214 format long doubles (format 'g') for output.
3216 sPRIGldbl (longdblfio.U):
3217 This variable, if defined, contains the string used by stdio to
3218 format long doubles (format 'G') for output.
3220 sPRIi64 (quadfio.U):
3221 This variable, if defined, contains the string used by stdio to
3222 format 64-bit decimal numbers (format 'i') for output.
3224 sPRIo64 (quadfio.U):
3225 This variable, if defined, contains the string used by stdio to
3226 format 64-bit octal numbers (format 'o') for output.
3228 sPRIu64 (quadfio.U):
3229 This variable, if defined, contains the string used by stdio to
3230 format 64-bit unsigned decimal numbers (format 'u') for output.
3232 sPRIx64 (quadfio.U):
3233 This variable, if defined, contains the string used by stdio to
3234 format 64-bit hexadecimal numbers (format 'x') for output.
3236 sPRIX64 (quadfio.U):
3237 This variable, if defined, contains the string used by stdio to
3238 format 64-bit hExADECimAl numbers (format 'X') for output.
3241 This variable holds the path to the package source. It is up to
3242 the Makefile to use this variable and set VPATH accordingly to
3243 find the sources remotely.
3245 ssizetype (ssizetype.U):
3246 This variable defines ssizetype to be something like ssize_t,
3247 long or int. It is used by functions that return a count
3248 of bytes or an error condition. It must be a signed type.
3249 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3251 startperl (startperl.U):
3252 This variable contains the string to put on the front of a perl
3253 script to make sure (hopefully) that it runs with perl and not some
3254 shell. Of course, that leading line must be followed by the classical
3256 eval 'exec perl -S $0 ${1+"$@"}'
3257 if $running_under_some_shell;
3258 to guarantee perl startup should the shell execute the script. Note
3259 that this magic incatation is not understood by csh.
3261 startsh (startsh.U):
3262 This variable contains the string to put on the front of a shell
3263 script to make sure (hopefully) that it runs with sh and not some
3266 static_ext (Extensions.U):
3267 This variable holds a list of XS extension files we want to
3268 link statically into the package. It is used by Makefile.
3270 stdchar (stdchar.U):
3271 This variable conditionally defines STDCHAR to be the type of char
3272 used in stdio.h. It has the values "unsigned char" or "char".
3274 stdio_base (d_stdstdio.U):
3275 This variable defines how, given a FILE pointer, fp, to access the
3276 _base field (or equivalent) of stdio.h's FILE structure. This will
3277 be used to define the macro FILE_base(fp).
3279 stdio_bufsiz (d_stdstdio.U):
3280 This variable defines how, given a FILE pointer, fp, to determine
3281 the number of bytes store in the I/O buffer pointer to by the
3282 _base field (or equivalent) of stdio.h's FILE structure. This will
3283 be used to define the macro FILE_bufsiz(fp).
3285 stdio_cnt (d_stdstdio.U):
3286 This variable defines how, given a FILE pointer, fp, to access the
3287 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3288 be used to define the macro FILE_cnt(fp).
3290 stdio_filbuf (d_stdstdio.U):
3291 This variable defines how, given a FILE pointer, fp, to tell
3292 stdio to refill it's internal buffers (?). This will
3293 be used to define the macro FILE_filbuf(fp).
3295 stdio_ptr (d_stdstdio.U):
3296 This variable defines how, given a FILE pointer, fp, to access the
3297 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3298 be used to define the macro FILE_ptr(fp).
3300 stdio_stream_array (stdio_streams.U):
3301 This variable tells the name of the array holding the stdio streams.
3302 Usual values include _iob, __iob, and __sF.
3304 strings (i_string.U):
3305 This variable holds the full path of the string header that will be
3306 used. Typically /usr/include/string.h or /usr/include/strings.h.
3309 This variable is defined but not used by Configure.
3310 The value is a plain '' and is not useful.
3312 subversion (patchlevel.U):
3313 The subversion level of this package.
3314 The value of subversion comes from the patchlevel.h file.
3315 In a version number such as 5.6.1, this is the "1".
3316 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3317 This is unique to perl.
3320 This variable holds the place where the manual is located on this
3321 system. It is not the place where the user wants to put his manual
3322 pages. Rather it is the place where Configure may look to find manual
3323 for unix commands (section 1 of the manual usually). See mansrc.
3326 This variable is defined but not used by Configure.
3327 The value is a plain '' and is not useful.
3330 This variable is defined but not used by Configure.
3331 The value is a plain '' and is not useful.
3334 This variable is defined but not used by Configure.
3335 The value is a plain '' and is not useful.
3338 This variable is defined but not used by Configure.
3339 The value is a plain '' and is not useful.
3342 This variable is used internally by Configure to determine the
3343 full pathname (if any) of the test program. After Configure runs,
3344 the value is reset to a plain "test" and is not useful.
3346 timeincl (i_time.U):
3347 This variable holds the full path of the included time header(s).
3349 timetype (d_time.U):
3350 This variable holds the type returned by time(). It can be long,
3351 or time_t on BSD sites (in which case <sys/types.h> should be
3352 included). Anyway, the type Time_t should be used.
3355 This variable is used internally by Configure to determine the
3356 full pathname (if any) of the touch program. After Configure runs,
3357 the value is reset to a plain "touch" and is not useful.
3360 This variable is used internally by Configure to determine the
3361 full pathname (if any) of the tr program. After Configure runs,
3362 the value is reset to a plain "tr" and is not useful.
3365 This variable contains the value to be passed to the tr(1)
3366 command to transliterate a newline. Typical values are
3367 '\012' and '\n'. This is needed for EBCDIC systems where
3368 newline is not necessarily '\012'.
3371 This variable is defined but not used by Configure.
3372 The value is a plain '' and is not useful.
3375 This variable is the size of an U16 in bytes.
3378 This variable contains the C type used for Perl's U16.
3381 This variable is the size of an U32 in bytes.
3384 This variable contains the C type used for Perl's U32.
3387 This variable is the size of an U64 in bytes.
3390 This variable contains the C type used for Perl's U64.
3393 This variable is the size of an U8 in bytes.
3396 This variable contains the C type used for Perl's U8.
3399 This variable contains the format string used for printing a Uid_t.
3401 uidsign (uidsign.U):
3402 This variable contains the signedness of a uidtype.
3403 1 for unsigned, -1 for signed.
3405 uidsize (uidsize.U):
3406 This variable contains the size of a uidtype in bytes.
3408 uidtype (uidtype.U):
3409 This variable defines Uid_t to be something like uid_t, int,
3410 ushort, or whatever type is used to declare user ids in the kernel.
3413 This variable is used internally by Configure to determine the
3414 full pathname (if any) of the uname program. After Configure runs,
3415 the value is reset to a plain "uname" and is not useful.
3418 This variable is used internally by Configure to determine the
3419 full pathname (if any) of the uniq program. After Configure runs,
3420 the value is reset to a plain "uniq" and is not useful.
3422 uquadtype (quadtype.U):
3423 This variable defines Uquad_t to be something like unsigned long,
3424 unsigned int, unsigned long long, uint64_t, or whatever type is
3425 used for 64-bit integers.
3427 use5005threads (usethreads.U):
3428 This variable conditionally defines the USE_5005THREADS symbol,
3429 and indicates that Perl should be built to use the 5.005-based
3430 threading implementation.
3432 use64bitall (use64bits.U):
3433 This variable conditionally defines the USE_64_BIT_ALL symbol,
3434 and indicates that 64-bit integer types should be used
3435 when available. The maximal possible
3436 64-bitness is employed: LP64 or ILP64, meaning that you will
3437 be able to use more than 2 gigabytes of memory. This mode is
3438 even more binary incompatible than USE_64_BIT_INT. You may not
3439 be able to run the resulting executable in a 32-bit CPU at all or
3440 you may need at least to reboot your OS to 64-bit mode.
3442 use64bitint (use64bits.U):
3443 This variable conditionally defines the USE_64_BIT_INT symbol,
3444 and indicates that 64-bit integer types should be used
3445 when available. The minimal possible 64-bitness
3446 is employed, just enough to get 64-bit integers into Perl.
3447 This may mean using for example "long longs", while your memory
3448 may still be limited to 2 gigabytes.
3451 This variable indicates if the system supports dynamic
3452 loading of some sort. See also dlsrc and dlobj.
3454 useithreads (usethreads.U):
3455 This variable conditionally defines the USE_ITHREADS symbol,
3456 and indicates that Perl should be built to use the interpreter-based
3457 threading implementation.
3459 uselargefiles (uselfs.U):
3460 This variable conditionally defines the USE_LARGE_FILES symbol,
3461 and indicates that large file interfaces should be used when
3464 uselongdouble (uselongdbl.U):
3465 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3466 and indicates that long doubles should be used when available.
3468 usemorebits (usemorebits.U):
3469 This variable conditionally defines the USE_MORE_BITS symbol,
3470 and indicates that explicit 64-bit interfaces and long doubles
3471 should be used when available.
3473 usemultiplicity (usemultiplicity.U):
3474 This variable conditionally defines the MULTIPLICITY symbol,
3475 and indicates that Perl should be built to use multiplicity.
3477 usemymalloc (mallocsrc.U):
3478 This variable contains y if the malloc that comes with this package
3479 is desired over the system's version of malloc. People often include
3480 special versions of malloc for effiency, but such versions are often
3481 less portable. See also mallocsrc and mallocobj.
3482 If this is 'y', then -lmalloc is removed from $libs.
3485 This variable contains 'true' or 'false' depending whether the
3486 nm extraction is wanted or not.
3488 useopcode (Extensions.U):
3489 This variable holds either 'true' or 'false' to indicate
3490 whether the Opcode extension should be used. The sole
3491 use for this currently is to allow an easy mechanism
3492 for users to skip the Opcode extension from the Configure
3495 useperlio (useperlio.U):
3496 This variable conditionally defines the USE_PERLIO symbol,
3497 and indicates that the PerlIO abstraction should be
3500 useposix (Extensions.U):
3501 This variable holds either 'true' or 'false' to indicate
3502 whether the POSIX extension should be used. The sole
3503 use for this currently is to allow an easy mechanism
3504 for hints files to indicate that POSIX will not compile
3505 on a particular system.
3508 This variable is set to true when the user agrees to use sfio.
3509 It is set to false when sfio is not available or when the user
3510 explicitely requests not to use sfio. It is here primarily so
3511 that command-line settings can override the auto-detection of
3512 d_sfio without running into a "WHOA THERE".
3514 useshrplib (libperl.U):
3515 This variable is set to 'yes' if the user wishes
3516 to build a shared libperl, and 'no' otherwise.
3518 usesocks (usesocks.U):
3519 This variable conditionally defines the USE_SOCKS symbol,
3520 and indicates that Perl should be built to use SOCKS.
3522 usethreads (usethreads.U):
3523 This variable conditionally defines the USE_THREADS symbol,
3524 and indicates that Perl should be built to use threads.
3526 usevendorprefix (vendorprefix.U):
3527 This variable tells whether the vendorprefix
3528 and consequently other vendor* paths are in use.
3530 usevfork (d_vfork.U):
3531 This variable is set to true when the user accepts to use vfork.
3532 It is set to false when no vfork is available or when the user
3533 explicitely requests not to use vfork.
3536 This variable holds the path of the include files, which is
3537 usually /usr/include. It is mainly used by other Configure units.
3540 This variable is defined but not used by Configure.
3541 The value is a plain '' and is not useful.
3543 uvoformat (perlxvf.U):
3544 This variable contains the format string used for printing
3545 a Perl UV as an unsigned octal integer.
3548 This variable is the size of a UV in bytes.
3551 This variable contains the C type used for Perl's UV.
3553 uvuformat (perlxvf.U):
3554 This variable contains the format string used for printing
3555 a Perl UV as an unsigned decimal integer.
3557 uvxformat (perlxvf.U):
3558 This variable contains the format string used for printing
3559 a Perl UV as an unsigned hexadecimal integer.
3561 vendorarch (vendorarch.U):
3562 This variable contains the value of the PERL_VENDORARCH symbol.
3563 It may have a ~ on the front.
3564 The standard distribution will put nothing in this directory.
3565 Vendors who distribute perl may wish to place their own
3566 architecture-dependent modules and extensions in this directory with
3567 MakeMaker Makefile.PL INSTALLDIRS=vendor
3568 or equivalent. See INSTALL for details.
3570 vendorarchexp (vendorarch.U):
3571 This variable is the ~name expanded version of vendorarch, so that you
3572 may use it directly in Makefiles or shell scripts.
3574 vendorbin (vendorbin.U):
3575 This variable contains the eventual value of the VENDORBIN symbol.
3576 It may have a ~ on the front.
3577 The standard distribution will put nothing in this directory.
3578 Vendors who distribute perl may wish to place additional
3579 binaries in this directory with
3580 MakeMaker Makefile.PL INSTALLDIRS=vendor
3581 or equivalent. See INSTALL for details.
3583 vendorbinexp (vendorbin.U):
3584 This variable is the ~name expanded version of vendorbin, so that you
3585 may use it directly in Makefiles or shell scripts.
3587 vendorlib (vendorlib.U):
3588 This variable contains the eventual value of the VENDORLIB symbol,
3589 which is the name of the private library for this package.
3590 The standard distribution will put nothing in this directory.
3591 Vendors who distribute perl may wish to place their own
3592 modules in this directory with
3593 MakeMaker Makefile.PL INSTALLDIRS=vendor
3594 or equivalent. See INSTALL for details.
3596 vendorlib_stem (vendorlib.U):
3597 This variable is $vendorlibexp with any trailing version-specific component
3598 removed. The elements in inc_version_list (inc_version_list.U) can
3599 be tacked onto this variable to generate a list of directories to search.
3601 vendorlibexp (vendorlib.U):
3602 This variable is the ~name expanded version of vendorlib, so that you
3603 may use it directly in Makefiles or shell scripts.
3605 vendorprefix (vendorprefix.U):
3606 This variable holds the full absolute path of the directory below
3607 which the vendor will install add-on packages.
3608 See INSTALL for usage and examples.
3610 vendorprefixexp (vendorprefix.U):
3611 This variable holds the full absolute path of the directory below
3612 which the vendor will install add-on packages. Derived from vendorprefix.
3614 version (patchlevel.U):
3615 The full version number of this package, such as 5.6.1 (or 5_6_1).
3616 This combines revision, patchlevel, and subversion to get the
3617 full version number, including any possible subversions.
3618 This is suitable for use as a directory name, and hence is
3619 filesystem dependent.
3622 This variable is defined but not used by Configure.
3623 The value is a plain '' and is not useful.
3625 voidflags (voidflags.U):
3626 This variable contains the eventual value of the VOIDFLAGS symbol,
3627 which indicates how much support of the void type is given by this
3628 compiler. See VOIDFLAGS for more info.
3631 This variable holds extra path (space-separated) used to find
3632 libraries on this platform, for example CPU-specific libraries
3633 (on multi-CPU platforms) may be listed here.
3635 xs_apiversion (xs_apiversion.U):
3636 This variable contains the version of the oldest perl binary
3637 compatible with the present perl. perl.c:incpush() and
3638 lib/lib.pm will automatically search in $sitearch for older
3639 directories across major versions back to xs_apiversion.
3640 This is only useful if you have a perl library directory tree
3641 structured like the default one.
3642 See INSTALL for how this works.
3643 The versioned site_perl directory was introduced in 5.005,
3644 so that is the lowest possible value.
3645 Since this can depend on compile time options (such as
3646 bincompat) it is set by Configure. Other non-default sources
3647 of potential incompatibility, such as multiplicity, threads,
3648 debugging, 64bits, sfio, etc., are not checked for currently,
3649 though in principle we could go snooping around in old
3653 This variable is defined but not used by Configure.
3654 The value is a plain '' and is not useful.
3657 This variable is used internally by Configure to determine the
3658 full pathname (if any) of the zip program. After Configure runs,
3659 the value is reset to a plain "zip" and is not useful.