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_endspent (d_endspent.U):
510 This variable conditionally defines HAS_ENDSPENT if endspent() is
511 available to finalize the scan of SysV shadow password entries.
513 d_eofnblk (nblock_io.U):
514 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
515 when reading from a non-blocking I/O source.
518 This variable conditionally defines the symbols EUNICE and VAX, which
519 alerts the C program that it must deal with ideosyncracies of VMS.
521 d_fchmod (d_fchmod.U):
522 This variable conditionally defines the HAS_FCHMOD symbol, which
523 indicates to the C program that the fchmod() routine is available
524 to change mode of opened files.
526 d_fchown (d_fchown.U):
527 This variable conditionally defines the HAS_FCHOWN symbol, which
528 indicates to the C program that the fchown() routine is available
529 to change ownership of opened files.
532 This variable conditionally defines the HAS_FCNTL symbol, and indicates
533 whether the fcntl() function exists
535 d_fd_macros (d_fd_set.U):
536 This variable contains the eventual value of the HAS_FD_MACROS symbol,
537 which indicates if your C compiler knows about the macros which
538 manipulate an fd_set.
540 d_fd_set (d_fd_set.U):
541 This variable contains the eventual value of the HAS_FD_SET symbol,
542 which indicates if your C compiler knows about the fd_set typedef.
544 d_fds_bits (d_fd_set.U):
545 This variable contains the eventual value of the HAS_FDS_BITS symbol,
546 which indicates if your fd_set typedef contains the fds_bits member.
547 If you have an fd_set typedef, but the dweebs who installed it did
548 a half-fast job and neglected to provide the macros to manipulate
549 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
551 d_fgetpos (d_fgetpos.U):
552 This variable conditionally defines HAS_FGETPOS if fgetpos() is
553 available to get the file position indicator.
555 d_flexfnam (d_flexfnam.U):
556 This variable conditionally defines the FLEXFILENAMES symbol, which
557 indicates that the system supports filenames longer than 14 characters.
560 This variable conditionally defines HAS_FLOCK if flock() is
561 available to do file locking.
564 This variable conditionally defines the HAS_FORK symbol, which
565 indicates to the C program that the fork() routine is available.
567 d_fpathconf (d_pathconf.U):
568 This variable conditionally defines the HAS_FPATHCONF symbol, which
569 indicates to the C program that the pathconf() routine is available
570 to determine file-system related limits and options associated
571 with a given open file descriptor.
573 d_fpos64_t (d_fpos64_t.U):
574 This symbol will be defined if the C compiler supports fpos64_t.
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_getfsstat (d_getfsstat.U):
620 This variable conditionally defines the HAS_GETFSSTAT symbol, which
621 indicates to the C program that the getfsstat() routine is available.
623 d_getgrent (d_getgrent.U):
624 This variable conditionally defines the HAS_GETGRENT symbol, which
625 indicates to the C program that the getgrent() routine is available
626 for sequential access of the group database.
628 d_getgrps (d_getgrps.U):
629 This variable conditionally defines the HAS_GETGROUPS symbol, which
630 indicates to the C program that the getgroups() routine is available
631 to get the list of process groups.
633 d_gethbyaddr (d_gethbyad.U):
634 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
635 indicates to the C program that the gethostbyaddr() routine is available
636 to look up hosts by their IP addresses.
638 d_gethbyname (d_gethbynm.U):
639 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
640 indicates to the C program that the gethostbyname() routine is available
641 to look up host names in some data base or other.
643 d_gethent (d_gethent.U):
644 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
645 available to look up host names in some data base or another.
647 d_gethname (d_gethname.U):
648 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
649 indicates to the C program that the gethostname() routine may be
650 used to derive the host name.
652 d_gethostprotos (d_gethostprotos.U):
653 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
654 which indicates to the C program that <netdb.h> supplies
655 prototypes for the various gethost*() functions.
656 See also netdbtype.U for probing for various netdb types.
658 d_getlogin (d_getlogin.U):
659 This variable conditionally defines the HAS_GETLOGIN symbol, which
660 indicates to the C program that the getlogin() routine is available
661 to get the login name.
663 d_getmnt (d_getmnt.U):
664 This variable conditionally defines the HAS_GETMNT symbol, which
665 indicates to the C program that the getmnt() routine is available
666 to retrieve one or more mount info blocks by filename.
668 d_getmntent (d_getmntent.U):
669 This variable conditionally defines the HAS_GETMNTENT symbol, which
670 indicates to the C program that the getmntent() routine is available
671 to iterate through mounted files to get their mount info.
673 d_getnbyaddr (d_getnbyad.U):
674 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
675 indicates to the C program that the getnetbyaddr() routine is available
676 to look up networks by their IP addresses.
678 d_getnbyname (d_getnbynm.U):
679 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
680 indicates to the C program that the getnetbyname() routine is available
681 to look up networks by their names.
683 d_getnent (d_getnent.U):
684 This variable conditionally defines HAS_GETNETENT if getnetent() is
685 available to look up network names in some data base or another.
687 d_getnetprotos (d_getnetprotos.U):
688 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
689 which indicates to the C program that <netdb.h> supplies
690 prototypes for the various getnet*() functions.
691 See also netdbtype.U for probing for various netdb types.
693 d_getpbyname (d_getprotby.U):
694 This variable conditionally defines the HAS_GETPROTOBYNAME
695 symbol, which indicates to the C program that the
696 getprotobyname() routine is available to look up protocols
699 d_getpbynumber (d_getprotby.U):
700 This variable conditionally defines the HAS_GETPROTOBYNUMBER
701 symbol, which indicates to the C program that the
702 getprotobynumber() routine is available to look up protocols
705 d_getpent (d_getpent.U):
706 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
707 available to look up protocols in some data base or another.
709 d_getpgid (d_getpgid.U):
710 This variable conditionally defines the HAS_GETPGID symbol, which
711 indicates to the C program that the getpgid(pid) function
712 is available to get the process group id.
714 d_getpgrp2 (d_getpgrp2.U):
715 This variable conditionally defines the HAS_GETPGRP2 symbol, which
716 indicates to the C program that the getpgrp2() (as in DG/UX) routine
717 is available to get the current process group.
719 d_getpgrp (d_getpgrp.U):
720 This variable conditionally defines HAS_GETPGRP if getpgrp() is
721 available to get the current process group.
723 d_getppid (d_getppid.U):
724 This variable conditionally defines the HAS_GETPPID symbol, which
725 indicates to the C program that the getppid() routine is available
726 to get the parent process ID.
728 d_getprior (d_getprior.U):
729 This variable conditionally defines HAS_GETPRIORITY if getpriority()
730 is available to get a process's priority.
732 d_getprotoprotos (d_getprotoprotos.U):
733 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
734 which indicates to the C program that <netdb.h> supplies
735 prototypes for the various getproto*() functions.
736 See also netdbtype.U for probing for various netdb types.
738 d_getpwent (d_getpwent.U):
739 This variable conditionally defines the HAS_GETPWENT symbol, which
740 indicates to the C program that the getpwent() routine is available
741 for sequential access of the passwd database.
743 d_getsbyname (d_getsrvby.U):
744 This variable conditionally defines the HAS_GETSERVBYNAME
745 symbol, which indicates to the C program that the
746 getservbyname() routine is available to look up services
749 d_getsbyport (d_getsrvby.U):
750 This variable conditionally defines the HAS_GETSERVBYPORT
751 symbol, which indicates to the C program that the
752 getservbyport() routine is available to look up services
755 d_getsent (d_getsent.U):
756 This variable conditionally defines HAS_GETSERVENT if getservent() is
757 available to look up network services in some data base or another.
759 d_getservprotos (d_getservprotos.U):
760 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
761 which indicates to the C program that <netdb.h> supplies
762 prototypes for the various getserv*() functions.
763 See also netdbtype.U for probing for various netdb types.
765 d_getspent (d_getspent.U):
766 This variable conditionally defines HAS_GETSPENT if getspent() is
767 available to retrieve SysV shadow password entries sequentially.
769 d_getspnam (d_getspnam.U):
770 This variable conditionally defines HAS_GETSPNAM if getspnam() is
771 available to retrieve SysV shadow password entries by name.
773 d_gettimeod (d_ftime.U):
774 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
775 indicates that the gettimeofday() system call exists (to obtain a
776 sub-second accuracy clock). You should probably include <sys/resource.h>.
778 d_gnulibc (d_gnulibc.U):
779 Defined if we're dealing with the GNU C Library.
781 d_grpasswd (i_grp.U):
782 This variable conditionally defines GRPASSWD, which indicates
783 that struct group in <grp.h> contains gr_passwd.
785 d_hasmntopt (d_hasmntopt.U):
786 This variable conditionally defines the HAS_HASMNTOPT symbol, which
787 indicates to the C program that the hasmntopt() routine is available
788 to query the mount options of file systems.
791 This variable conditionally defines HAS_HTONL if htonl() and its
792 friends are available to do network order byte swapping.
795 This variable conditionally defines the HAS_ICONV symbol, which
796 indicates to the C program that the iconv() routine is available.
798 d_index (d_strchr.U):
799 This variable conditionally defines HAS_INDEX if index() and
800 rindex() are available for string searching.
802 d_inetaton (d_inetaton.U):
803 This variable conditionally defines the HAS_INET_ATON symbol, which
804 indicates to the C program that the inet_aton() function is available
805 to parse IP address "dotted-quad" strings.
807 d_int64_t (d_int64_t.U):
808 This symbol will be defined if the C compiler supports int64_t.
810 d_isascii (d_isascii.U):
811 This variable conditionally defines the HAS_ISASCII constant,
812 which indicates to the C program that isascii() is available.
814 d_killpg (d_killpg.U):
815 This variable conditionally defines the HAS_KILLPG symbol, which
816 indicates to the C program that the killpg() routine is available
817 to kill process groups.
819 d_lchown (d_lchown.U):
820 This variable conditionally defines the HAS_LCHOWN symbol, which
821 indicates to the C program that the lchown() routine is available
822 to operate on a symbolic link (instead of following the link).
824 d_ldbl_dig (d_ldbl_dig.U):
825 This variable conditionally defines d_ldbl_dig if this system's
826 header files provide LDBL_DIG, which is the number of significant
827 digits in a long double precision number.
830 This variable conditionally defines HAS_LINK if link() is
831 available to create hard links.
833 d_locconv (d_locconv.U):
834 This variable conditionally defines HAS_LOCALECONV if localeconv() is
835 available for numeric and monetary formatting conventions.
838 This variable conditionally defines HAS_LOCKF if lockf() is
839 available to do file locking.
841 d_longdbl (d_longdbl.U):
842 This variable conditionally defines HAS_LONG_DOUBLE if
843 the long double type is supported.
845 d_longlong (d_longlong.U):
846 This variable conditionally defines HAS_LONG_LONG if
847 the long long type is supported.
849 d_lseekproto (d_lseekproto.U):
850 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
851 which indicates to the C program that the system provides
852 a prototype for the lseek() function. Otherwise, it is
853 up to the program to supply one.
856 This variable conditionally defines HAS_LSTAT if lstat() is
857 available to do file stats on symbolic links.
859 d_madvise (d_madvise.U):
860 This variable conditionally defines HAS_MADVISE if madvise() is
861 available to map a file into memory.
864 This variable conditionally defines the HAS_MBLEN symbol, which
865 indicates to the C program that the mblen() routine is available
866 to find the number of bytes in a multibye character.
868 d_mbstowcs (d_mbstowcs.U):
869 This variable conditionally defines the HAS_MBSTOWCS symbol, which
870 indicates to the C program that the mbstowcs() routine is available
871 to convert a multibyte string into a wide character string.
873 d_mbtowc (d_mbtowc.U):
874 This variable conditionally defines the HAS_MBTOWC symbol, which
875 indicates to the C program that the mbtowc() routine is available
876 to convert multibyte to a wide character.
878 d_memchr (d_memchr.U):
879 This variable conditionally defines the HAS_MEMCHR symbol, which
880 indicates to the C program that the memchr() routine is available
881 to locate characters within a C string.
883 d_memcmp (d_memcmp.U):
884 This variable conditionally defines the HAS_MEMCMP symbol, which
885 indicates to the C program that the memcmp() routine is available
886 to compare blocks of memory.
888 d_memcpy (d_memcpy.U):
889 This variable conditionally defines the HAS_MEMCPY symbol, which
890 indicates to the C program that the memcpy() routine is available
891 to copy blocks of memory.
893 d_memmove (d_memmove.U):
894 This variable conditionally defines the HAS_MEMMOVE symbol, which
895 indicates to the C program that the memmove() routine is available
896 to copy potentatially overlapping blocks of memory.
898 d_memset (d_memset.U):
899 This variable conditionally defines the HAS_MEMSET symbol, which
900 indicates to the C program that the memset() routine is available
901 to set blocks of memory.
904 This variable conditionally defines the HAS_MKDIR symbol, which
905 indicates to the C program that the mkdir() routine is available
906 to create directories..
908 d_mkdtemp (d_mkdtemp.U):
909 This variable conditionally defines the HAS_MKDTEMP symbol, which
910 indicates to the C program that the mkdtemp() routine is available
911 to exclusively create a uniquely named temporary directory.
913 d_mkfifo (d_mkfifo.U):
914 This variable conditionally defines the HAS_MKFIFO symbol, which
915 indicates to the C program that the mkfifo() routine is available.
917 d_mkstemp (d_mkstemp.U):
918 This variable conditionally defines the HAS_MKSTEMP symbol, which
919 indicates to the C program that the mkstemp() routine is available
920 to exclusively create and open a uniquely named temporary file.
922 d_mkstemps (d_mkstemps.U):
923 This variable conditionally defines the HAS_MKSTEMPS symbol, which
924 indicates to the C program that the mkstemps() routine is available
925 to exclusively create and open a uniquely named (with a suffix)
928 d_mktime (d_mktime.U):
929 This variable conditionally defines the HAS_MKTIME symbol, which
930 indicates to the C program that the mktime() routine is available.
933 This variable conditionally defines HAS_MMAP if mmap() is
934 available to map a file into memory.
936 d_mprotect (d_mprotect.U):
937 This variable conditionally defines HAS_MPROTECT if mprotect() is
938 available to modify the access protection of a memory mapped file.
941 This variable conditionally defines the HAS_MSG symbol, which
942 indicates that the entire msg*(2) library is present.
944 d_msg_ctrunc (d_socket.U):
945 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
946 which indicates that the MSG_CTRUNC is available. #ifdef is
947 not enough because it may be an enum, glibc has been known to do this.
949 d_msg_dontroute (d_socket.U):
950 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
951 which indicates that the MSG_DONTROUTE is available. #ifdef is
952 not enough because it may be an enum, glibc has been known to do this.
954 d_msg_oob (d_socket.U):
955 This variable conditionally defines the HAS_MSG_OOB symbol,
956 which indicates that the MSG_OOB is available. #ifdef is
957 not enough because it may be an enum, glibc has been known to do this.
959 d_msg_peek (d_socket.U):
960 This variable conditionally defines the HAS_MSG_PEEK symbol,
961 which indicates that the MSG_PEEK is available. #ifdef is
962 not enough because it may be an enum, glibc has been known to do this.
964 d_msg_proxy (d_socket.U):
965 This variable conditionally defines the HAS_MSG_PROXY symbol,
966 which indicates that the MSG_PROXY is available. #ifdef is
967 not enough because it may be an enum, glibc has been known to do this.
969 d_msgctl (d_msgctl.U):
970 This variable conditionally defines the HAS_MSGCTL symbol, which
971 indicates to the C program that the msgctl() routine is available.
973 d_msgget (d_msgget.U):
974 This variable conditionally defines the HAS_MSGGET symbol, which
975 indicates to the C program that the msgget() routine is available.
977 d_msgrcv (d_msgrcv.U):
978 This variable conditionally defines the HAS_MSGRCV symbol, which
979 indicates to the C program that the msgrcv() routine is available.
981 d_msgsnd (d_msgsnd.U):
982 This variable conditionally defines the HAS_MSGSND symbol, which
983 indicates to the C program that the msgsnd() routine is available.
986 This variable conditionally defines HAS_MSYNC if msync() is
987 available to synchronize a mapped file.
989 d_munmap (d_munmap.U):
990 This variable conditionally defines HAS_MUNMAP if munmap() is
991 available to unmap a region mapped by mmap().
993 d_mymalloc (mallocsrc.U):
994 This variable conditionally defines MYMALLOC in case other parts
995 of the source want to take special action if MYMALLOC is used.
996 This may include different sorts of profiling or error detection.
999 This variable conditionally defines the HAS_NICE symbol, which
1000 indicates to the C program that the nice() routine is available.
1002 d_nv_preserves_uv (perlxv.U):
1003 This variable indicates whether a variable of type nvtype
1004 can preserve all the bits a variable of type uvtype.
1006 d_off64_t (d_off64_t.U):
1007 This symbol will be defined if the C compiler supports off64_t.
1009 d_old_pthread_create_joinable (d_pthrattrj.U):
1010 This variable conditionally defines pthread_create_joinable.
1011 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1013 d_oldpthreads (usethreads.U):
1014 This variable conditionally defines the OLD_PTHREADS_API symbol,
1015 and indicates that Perl should be built to use the old
1016 draft POSIX threads API. This is only potentially meaningful if
1019 d_oldsock (d_socket.U):
1020 This variable conditionally defines the OLDSOCKET symbol, which
1021 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1023 d_open3 (d_open3.U):
1024 This variable conditionally defines the HAS_OPEN3 manifest constant,
1025 which indicates to the C program that the 3 argument version of
1026 the open(2) function is available.
1028 d_pathconf (d_pathconf.U):
1029 This variable conditionally defines the HAS_PATHCONF symbol, which
1030 indicates to the C program that the pathconf() routine is available
1031 to determine file-system related limits and options associated
1032 with a given filename.
1034 d_pause (d_pause.U):
1035 This variable conditionally defines the HAS_PAUSE symbol, which
1036 indicates to the C program that the pause() routine is available
1037 to suspend a process until a signal is received.
1039 d_phostname (d_gethname.U):
1040 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1041 contains the shell command which, when fed to popen(), may be
1042 used to derive the host name.
1045 This variable conditionally defines the HAS_PIPE symbol, which
1046 indicates to the C program that the pipe() routine is available
1047 to create an inter-process channel.
1050 This variable conditionally defines the HAS_POLL symbol, which
1051 indicates to the C program that the poll() routine is available
1052 to poll active file descriptors.
1054 d_portable (d_portable.U):
1055 This variable conditionally defines the PORTABLE symbol, which
1056 indicates to the C program that it should not assume that it is
1057 running on the machine it was compiled on.
1059 d_PRId64 (quadfio.U):
1060 This variable conditionally defines the PERL_PRId64 symbol, which
1061 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1063 d_PRIeldbl (longdblfio.U):
1064 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1065 indiciates that stdio has a symbol to print long doubles.
1067 d_PRIEldbl (longdblfio.U):
1068 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1069 indiciates that stdio has a symbol to print long doubles.
1071 d_PRIfldbl (longdblfio.U):
1072 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1073 indiciates that stdio has a symbol to print long doubles.
1075 d_PRIFldbl (longdblfio.U):
1076 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1077 indiciates that stdio has a symbol to print long doubles.
1079 d_PRIgldbl (longdblfio.U):
1080 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1081 indiciates that stdio has a symbol to print long doubles.
1083 d_PRIGldbl (longdblfio.U):
1084 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1085 indiciates that stdio has a symbol to print long doubles.
1087 d_PRIi64 (quadfio.U):
1088 This variable conditionally defines the PERL_PRIi64 symbol, which
1089 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1091 d_PRIo64 (quadfio.U):
1092 This variable conditionally defines the PERL_PRIo64 symbol, which
1093 indiciates that stdio has a symbol to print 64-bit octal numbers.
1095 d_PRIu64 (quadfio.U):
1096 This variable conditionally defines the PERL_PRIu64 symbol, which
1097 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1100 d_PRIx64 (quadfio.U):
1101 This variable conditionally defines the PERL_PRIx64 symbol, which
1102 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1104 d_PRIX64 (quadfio.U):
1105 This variable conditionally defines the PERL_PRIX64 symbol, which
1106 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1108 d_pthread_yield (d_pthread_y.U):
1109 This variable conditionally defines the HAS_PTHREAD_YIELD
1110 symbol if the pthread_yield routine is available to yield
1111 the execution of the current thread.
1114 This variable conditionally defines PWAGE, which indicates
1115 that struct passwd contains pw_age.
1117 d_pwchange (i_pwd.U):
1118 This variable conditionally defines PWCHANGE, which indicates
1119 that struct passwd contains pw_change.
1121 d_pwclass (i_pwd.U):
1122 This variable conditionally defines PWCLASS, which indicates
1123 that struct passwd contains pw_class.
1125 d_pwcomment (i_pwd.U):
1126 This variable conditionally defines PWCOMMENT, which indicates
1127 that struct passwd contains pw_comment.
1129 d_pwexpire (i_pwd.U):
1130 This variable conditionally defines PWEXPIRE, which indicates
1131 that struct passwd contains pw_expire.
1133 d_pwgecos (i_pwd.U):
1134 This variable conditionally defines PWGECOS, which indicates
1135 that struct passwd contains pw_gecos.
1137 d_pwpasswd (i_pwd.U):
1138 This variable conditionally defines PWPASSWD, which indicates
1139 that struct passwd contains pw_passwd.
1141 d_pwquota (i_pwd.U):
1142 This variable conditionally defines PWQUOTA, which indicates
1143 that struct passwd contains pw_quota.
1145 d_qgcvt (d_qgcvt.U):
1146 This variable conditionally defines the HAS_QGCVT symbol, which
1147 indicates to the C program that the qgcvt() routine is available.
1149 d_quad (quadtype.U):
1150 This variable, if defined, tells that there's a 64-bit integer type,
1153 d_readdir (d_readdir.U):
1154 This variable conditionally defines HAS_READDIR if readdir() is
1155 available to read directory entries.
1157 d_readlink (d_readlink.U):
1158 This variable conditionally defines the HAS_READLINK symbol, which
1159 indicates to the C program that the readlink() routine is available
1160 to read the value of a symbolic link.
1162 d_rename (d_rename.U):
1163 This variable conditionally defines the HAS_RENAME symbol, which
1164 indicates to the C program that the rename() routine is available
1167 d_rewinddir (d_readdir.U):
1168 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1171 d_rmdir (d_rmdir.U):
1172 This variable conditionally defines HAS_RMDIR if rmdir() is
1173 available to remove directories.
1175 d_safebcpy (d_safebcpy.U):
1176 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1177 the bcopy() routine can do overlapping copies.
1179 d_safemcpy (d_safemcpy.U):
1180 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1181 the memcpy() routine can do overlapping copies.
1183 d_sanemcmp (d_sanemcmp.U):
1184 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1185 the memcpy() routine is available and can be used to compare relative
1186 magnitudes of chars with their high bits set.
1188 d_sched_yield (d_pthread_y.U):
1189 This variable conditionally defines the HAS_SCHED_YIELD
1190 symbol if the sched_yield routine is available to yield
1191 the execution of the current thread.
1193 d_scm_rights (d_socket.U):
1194 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1195 which indicates that the SCM_RIGHTS is available. #ifdef is
1196 not enough because it may be an enum, glibc has been known to do this.
1198 d_seekdir (d_readdir.U):
1199 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1202 d_select (d_select.U):
1203 This variable conditionally defines HAS_SELECT if select() is
1204 available to select active file descriptors. A <sys/time.h>
1205 inclusion may be necessary for the timeout field.
1208 This variable conditionally defines the HAS_SEM symbol, which
1209 indicates that the entire sem*(2) library is present.
1211 d_semctl (d_semctl.U):
1212 This variable conditionally defines the HAS_SEMCTL symbol, which
1213 indicates to the C program that the semctl() routine is available.
1215 d_semctl_semid_ds (d_union_semun.U):
1216 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1217 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1219 d_semctl_semun (d_union_semun.U):
1220 This variable conditionally defines USE_SEMCTL_SEMUN, which
1221 indicates that union semun is to be used for semctl IPC_STAT.
1223 d_semget (d_semget.U):
1224 This variable conditionally defines the HAS_SEMGET symbol, which
1225 indicates to the C program that the semget() routine is available.
1227 d_semop (d_semop.U):
1228 This variable conditionally defines the HAS_SEMOP symbol, which
1229 indicates to the C program that the semop() routine is available.
1231 d_setegid (d_setegid.U):
1232 This variable conditionally defines the HAS_SETEGID symbol, which
1233 indicates to the C program that the setegid() routine is available
1234 to change the effective gid of the current program.
1236 d_seteuid (d_seteuid.U):
1237 This variable conditionally defines the HAS_SETEUID symbol, which
1238 indicates to the C program that the seteuid() routine is available
1239 to change the effective uid of the current program.
1241 d_setgrent (d_setgrent.U):
1242 This variable conditionally defines the HAS_SETGRENT symbol, which
1243 indicates to the C program that the setgrent() routine is available
1244 for initializing sequential access to the group database.
1246 d_setgrps (d_setgrps.U):
1247 This variable conditionally defines the HAS_SETGROUPS symbol, which
1248 indicates to the C program that the setgroups() routine is available
1249 to set the list of process groups.
1251 d_sethent (d_sethent.U):
1252 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1255 d_setlinebuf (d_setlnbuf.U):
1256 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1257 indicates to the C program that the setlinebuf() routine is available
1258 to change stderr or stdout from block-buffered or unbuffered to a
1261 d_setlocale (d_setlocale.U):
1262 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1263 available to handle locale-specific ctype implementations.
1265 d_setnent (d_setnent.U):
1266 This variable conditionally defines HAS_SETNETENT if setnetent() is
1269 d_setpent (d_setpent.U):
1270 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1273 d_setpgid (d_setpgid.U):
1274 This variable conditionally defines the HAS_SETPGID symbol if the
1275 setpgid(pid, gpid) function is available to set process group ID.
1277 d_setpgrp2 (d_setpgrp2.U):
1278 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1279 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1280 is available to set the current process group.
1282 d_setpgrp (d_setpgrp.U):
1283 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1284 available to set the current process group.
1286 d_setprior (d_setprior.U):
1287 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1288 is available to set a process's priority.
1290 d_setpwent (d_setpwent.U):
1291 This variable conditionally defines the HAS_SETPWENT symbol, which
1292 indicates to the C program that the setpwent() routine is available
1293 for initializing sequential access to the passwd database.
1295 d_setregid (d_setregid.U):
1296 This variable conditionally defines HAS_SETREGID if setregid() is
1297 available to change the real and effective gid of the current
1300 d_setresgid (d_setregid.U):
1301 This variable conditionally defines HAS_SETRESGID if setresgid() is
1302 available to change the real, effective and saved gid of the current
1305 d_setresuid (d_setreuid.U):
1306 This variable conditionally defines HAS_SETREUID if setresuid() is
1307 available to change the real, effective and saved uid of the current
1310 d_setreuid (d_setreuid.U):
1311 This variable conditionally defines HAS_SETREUID if setreuid() is
1312 available to change the real and effective uid of the current
1315 d_setrgid (d_setrgid.U):
1316 This variable conditionally defines the HAS_SETRGID symbol, which
1317 indicates to the C program that the setrgid() routine is available
1318 to change the real gid of the current program.
1320 d_setruid (d_setruid.U):
1321 This variable conditionally defines the HAS_SETRUID symbol, which
1322 indicates to the C program that the setruid() routine is available
1323 to change the real uid of the current program.
1325 d_setsent (d_setsent.U):
1326 This variable conditionally defines HAS_SETSERVENT if setservent() is
1329 d_setsid (d_setsid.U):
1330 This variable conditionally defines HAS_SETSID if setsid() is
1331 available to set the process group ID.
1333 d_setspent (d_setspent.U):
1334 This variable conditionally defines HAS_SETSPENT if setspent() is
1335 available to initialize the scan of SysV shadow password entries.
1337 d_setvbuf (d_setvbuf.U):
1338 This variable conditionally defines the HAS_SETVBUF symbol, which
1339 indicates to the C program that the setvbuf() routine is available
1340 to change buffering on an open stdio stream.
1343 This variable conditionally defines the USE_SFIO symbol,
1344 and indicates whether sfio is available (and should be used).
1347 This variable conditionally defines the HAS_SHM symbol, which
1348 indicates that the entire shm*(2) library is present.
1350 d_shmat (d_shmat.U):
1351 This variable conditionally defines the HAS_SHMAT symbol, which
1352 indicates to the C program that the shmat() routine is available.
1354 d_shmatprototype (d_shmat.U):
1355 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1356 symbol, which indicates that sys/shm.h has a prototype for
1359 d_shmctl (d_shmctl.U):
1360 This variable conditionally defines the HAS_SHMCTL symbol, which
1361 indicates to the C program that the shmctl() routine is available.
1363 d_shmdt (d_shmdt.U):
1364 This variable conditionally defines the HAS_SHMDT symbol, which
1365 indicates to the C program that the shmdt() routine is available.
1367 d_shmget (d_shmget.U):
1368 This variable conditionally defines the HAS_SHMGET symbol, which
1369 indicates to the C program that the shmget() routine is available.
1371 d_sigaction (d_sigaction.U):
1372 This variable conditionally defines the HAS_SIGACTION symbol, which
1373 indicates that the Vr4 sigaction() routine is available.
1375 d_sigsetjmp (d_sigsetjmp.U):
1376 This variable conditionally defines the HAS_SIGSETJMP symbol,
1377 which indicates that the sigsetjmp() routine is available to
1378 call setjmp() and optionally save the process's signal mask.
1380 d_socket (d_socket.U):
1381 This variable conditionally defines HAS_SOCKET, which indicates
1382 that the BSD socket interface is supported.
1384 d_socklen_t (d_socklen_t.U):
1385 This symbol will be defined if the C compiler supports socklen_t.
1387 d_sockpair (d_socket.U):
1388 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1389 indicates that the BSD socketpair() is supported.
1391 d_sqrtl (d_sqrtl.U):
1392 This variable conditionally defines the HAS_SQRTL symbol, which
1393 indicates to the C program that the sqrtl() routine is available.
1395 d_statblks (d_statblks.U):
1396 This variable conditionally defines USE_STAT_BLOCKS
1397 if this system has a stat structure declaring
1398 st_blksize and st_blocks.
1400 d_statfs_f_flags (d_statfs_f_flags.U):
1401 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1402 symbol, which indicates to struct statfs from has f_flags member.
1403 This kind of struct statfs is coming from sys/mount.h (BSD),
1404 not from sys/statfs.h (SYSV).
1406 d_statfs_s (d_statfs_s.U):
1407 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1408 which indicates that the struct statfs is supported.
1410 d_statvfs (d_statvfs.U):
1411 This variable conditionally defines the HAS_STATVFS symbol, which
1412 indicates to the C program that the statvfs() routine is available.
1414 d_stdio_cnt_lval (d_stdstdio.U):
1415 This variable conditionally defines STDIO_CNT_LVALUE if the
1416 FILE_cnt macro can be used as an lvalue.
1418 d_stdio_ptr_lval (d_stdstdio.U):
1419 This variable conditionally defines STDIO_PTR_LVALUE if the
1420 FILE_ptr macro can be used as an lvalue.
1422 d_stdio_stream_array (stdio_streams.U):
1423 This variable tells whether there is an array holding
1426 d_stdiobase (d_stdstdio.U):
1427 This variable conditionally defines USE_STDIO_BASE if this system
1428 has a FILE structure declaring a usable _base field (or equivalent)
1431 d_stdstdio (d_stdstdio.U):
1432 This variable conditionally defines USE_STDIO_PTR if this system
1433 has a FILE structure declaring usable _ptr and _cnt fields (or
1434 equivalent) in stdio.h.
1436 d_strchr (d_strchr.U):
1437 This variable conditionally defines HAS_STRCHR if strchr() and
1438 strrchr() are available for string searching.
1440 d_strcoll (d_strcoll.U):
1441 This variable conditionally defines HAS_STRCOLL if strcoll() is
1442 available to compare strings using collating information.
1444 d_strctcpy (d_strctcpy.U):
1445 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1446 indicates to the C program that this C compiler knows how to copy
1449 d_strerrm (d_strerror.U):
1450 This variable holds what Strerrr is defined as to translate an error
1451 code condition into an error message string. It could be 'strerror'
1452 or a more complex macro emulating strrror with sys_errlist[], or the
1453 "unknown" string when both strerror and sys_errlist are missing.
1455 d_strerror (d_strerror.U):
1456 This variable conditionally defines HAS_STRERROR if strerror() is
1457 available to translate error numbers to strings.
1459 d_strtod (d_strtod.U):
1460 This variable conditionally defines the HAS_STRTOD symbol, which
1461 indicates to the C program that the strtod() routine is available
1462 to provide better numeric string conversion than atof().
1464 d_strtol (d_strtol.U):
1465 This variable conditionally defines the HAS_STRTOL symbol, which
1466 indicates to the C program that the strtol() routine is available
1467 to provide better numeric string conversion than atoi() and friends.
1469 d_strtold (d_strtold.U):
1470 This variable conditionally defines the HAS_STRTOLD symbol, which
1471 indicates to the C program that the strtold() routine is available.
1473 d_strtoll (d_strtoll.U):
1474 This variable conditionally defines the HAS_STRTOLL symbol, which
1475 indicates to the C program that the strtoll() routine is available.
1477 d_strtoul (d_strtoul.U):
1478 This variable conditionally defines the HAS_STRTOUL symbol, which
1479 indicates to the C program that the strtoul() routine is available
1480 to provide conversion of strings to unsigned long.
1482 d_strtoull (d_strtoull.U):
1483 This variable conditionally defines the HAS_STRTOULL symbol, which
1484 indicates to the C program that the strtoull() routine is available.
1486 d_strtouq (d_strtouq.U):
1487 This variable conditionally defines the HAS_STRTOUQ symbol, which
1488 indicates to the C program that the strtouq() routine is available.
1490 d_strxfrm (d_strxfrm.U):
1491 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1492 available to transform strings.
1494 d_suidsafe (d_dosuid.U):
1495 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1496 if setuid scripts can be secure. This test looks in /dev/fd/.
1498 d_symlink (d_symlink.U):
1499 This variable conditionally defines the HAS_SYMLINK symbol, which
1500 indicates to the C program that the symlink() routine is available
1501 to create symbolic links.
1503 d_syscall (d_syscall.U):
1504 This variable conditionally defines HAS_SYSCALL if syscall() is
1505 available call arbitrary system calls.
1507 d_sysconf (d_sysconf.U):
1508 This variable conditionally defines the HAS_SYSCONF symbol, which
1509 indicates to the C program that the sysconf() routine is available
1510 to determine system related limits and options.
1512 d_sysernlst (d_strerror.U):
1513 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1514 is available to translate error numbers to the symbolic name.
1516 d_syserrlst (d_strerror.U):
1517 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1518 available to translate error numbers to strings.
1520 d_system (d_system.U):
1521 This variable conditionally defines HAS_SYSTEM if system() is
1522 available to issue a shell command.
1524 d_tcgetpgrp (d_tcgtpgrp.U):
1525 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1526 indicates to the C program that the tcgetpgrp() routine is available.
1527 to get foreground process group ID.
1529 d_tcsetpgrp (d_tcstpgrp.U):
1530 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1531 indicates to the C program that the tcsetpgrp() routine is available
1532 to set foreground process group ID.
1534 d_telldir (d_readdir.U):
1535 This variable conditionally defines HAS_TELLDIR if telldir() is
1538 d_telldirproto (d_telldirproto.U):
1539 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1540 which indicates to the C program that the system provides
1541 a prototype for the telldir() function. Otherwise, it is
1542 up to the program to supply one.
1545 This variable conditionally defines the HAS_TIME symbol, which indicates
1546 that the time() routine exists. The time() routine is normaly
1547 provided on UNIX systems.
1549 d_times (d_times.U):
1550 This variable conditionally defines the HAS_TIMES symbol, which indicates
1551 that the times() routine exists. The times() routine is normaly
1552 provided on UNIX systems. You may have to include <sys/times.h>.
1554 d_truncate (d_truncate.U):
1555 This variable conditionally defines HAS_TRUNCATE if truncate() is
1556 available to truncate files.
1558 d_tzname (d_tzname.U):
1559 This variable conditionally defines HAS_TZNAME if tzname[] is
1560 available to access timezone names.
1562 d_umask (d_umask.U):
1563 This variable conditionally defines the HAS_UMASK symbol, which
1564 indicates to the C program that the umask() routine is available.
1565 to set and get the value of the file creation mask.
1567 d_uname (d_gethname.U):
1568 This variable conditionally defines the HAS_UNAME symbol, which
1569 indicates to the C program that the uname() routine may be
1570 used to derive the host name.
1572 d_union_semun (d_union_semun.U):
1573 This variable conditionally defines HAS_UNION_SEMUN if the
1574 union semun is defined by including <sys/sem.h>.
1576 d_ustat (d_ustat.U):
1577 This variable conditionally defines HAS_USTAT if ustat() is
1578 available to query file system statistics by dev_t.
1580 d_vendorarch (vendorarch.U):
1581 This variable conditionally defined PERL_VENDORARCH.
1583 d_vendorbin (vendorbin.U):
1584 This variable conditionally defines PERL_VENDORBIN.
1586 d_vendorlib (vendorlib.U):
1587 This variable conditionally defines PERL_VENDORLIB.
1589 d_vfork (d_vfork.U):
1590 This variable conditionally defines the HAS_VFORK symbol, which
1591 indicates the vfork() routine is available.
1593 d_void_closedir (d_closedir.U):
1594 This variable conditionally defines VOID_CLOSEDIR if closedir()
1595 does not return a value.
1597 d_voidsig (d_voidsig.U):
1598 This variable conditionally defines VOIDSIG if this system
1599 declares "void (*signal(...))()" in signal.h. The old way was to
1600 declare it as "int (*signal(...))()".
1602 d_voidtty (i_sysioctl.U):
1603 This variable conditionally defines USE_IOCNOTTY to indicate that the
1604 ioctl() call with TIOCNOTTY should be used to void tty association.
1605 Otherwise (on USG probably), it is enough to close the standard file
1606 decriptors and do a setpgrp().
1608 d_volatile (d_volatile.U):
1609 This variable conditionally defines the HASVOLATILE symbol, which
1610 indicates to the C program that this C compiler knows about the
1611 volatile declaration.
1613 d_vprintf (d_vprintf.U):
1614 This variable conditionally defines the HAS_VPRINTF symbol, which
1615 indicates to the C program that the vprintf() routine is available
1616 to printf with a pointer to an argument list.
1618 d_wait4 (d_wait4.U):
1619 This variable conditionally defines the HAS_WAIT4 symbol, which
1620 indicates the wait4() routine is available.
1622 d_waitpid (d_waitpid.U):
1623 This variable conditionally defines HAS_WAITPID if waitpid() is
1624 available to wait for child process.
1626 d_wcstombs (d_wcstombs.U):
1627 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1628 indicates to the C program that the wcstombs() routine is available
1629 to convert wide character strings to multibyte strings.
1631 d_wctomb (d_wctomb.U):
1632 This variable conditionally defines the HAS_WCTOMB symbol, which
1633 indicates to the C program that the wctomb() routine is available
1634 to convert a wide character to a multibyte.
1637 This variable conditionally defines the symbol XENIX, which alerts
1638 the C program that it runs under Xenix.
1641 This variable is used internally by Configure to determine the
1642 full pathname (if any) of the date program. After Configure runs,
1643 the value is reset to a plain "date" and is not useful.
1645 db_hashtype (i_db.U):
1646 This variable contains the type of the hash structure element
1647 in the <db.h> header file. In older versions of DB, it was
1648 int, while in newer ones it is u_int32_t.
1650 db_prefixtype (i_db.U):
1651 This variable contains the type of the prefix structure element
1652 in the <db.h> header file. In older versions of DB, it was
1653 int, while in newer ones it is size_t.
1655 defvoidused (voidflags.U):
1656 This variable contains the default value of the VOIDUSED symbol (15).
1658 direntrytype (i_dirent.U):
1659 This symbol is set to 'struct direct' or 'struct dirent' depending on
1660 whether dirent is available or not. You should use this pseudo type to
1661 portably declare your directory entries.
1664 This variable contains the extension that is to be used for the
1665 dynamically loaded modules that perl generaties.
1668 This variable contains the name of the dynamic loading file that
1669 will be used with the package.
1671 doublesize (doublesize.U):
1672 This variable contains the value of the DOUBLESIZE symbol, which
1673 indicates to the C program how many bytes there are in a double.
1675 drand01 (randfunc.U):
1676 Indicates the macro to be used to generate normalized
1677 random numbers. Uses randfunc, often divided by
1678 (double) (((unsigned long) 1 << randbits)) in order to
1679 normalize the result.
1680 In C programs, the macro 'Drand01' is mapped to drand01.
1682 dynamic_ext (Extensions.U):
1683 This variable holds a list of XS extension files we want to
1684 link dynamically into the package. It is used by Makefile.
1686 eagain (nblock_io.U):
1687 This variable bears the symbolic errno code set by read() when no
1688 data is present on the file and non-blocking I/O was enabled (otherwise,
1689 read() blocks naturally).
1692 This variable conditionally defines EBCDIC if this
1693 system uses EBCDIC encoding. Among other things, this
1694 means that the character ranges are not contiguous.
1698 This variable is used internally by Configure to determine the
1699 full pathname (if any) of the echo program. After Configure runs,
1700 the value is reset to a plain "echo" and is not useful.
1703 This variable is used internally by Configure to determine the
1704 full pathname (if any) of the egrep program. After Configure runs,
1705 the value is reset to a plain "egrep" and is not useful.
1708 This variable is defined but not used by Configure.
1709 The value is a plain '' and is not useful.
1712 When running under Eunice this variable contains a command which will
1713 convert a shell script to the proper form of text file for it to be
1714 executable by the shell. On other systems it is a no-op.
1717 This is an old synonym for _exe.
1720 This variable is used internally by Configure to determine the
1721 full pathname (if any) of the expr program. After Configure runs,
1722 the value is reset to a plain "expr" and is not useful.
1724 extensions (Extensions.U):
1725 This variable holds a list of all extension files (both XS and
1726 non-xs linked into the package. It is propagated to Config.pm
1727 and is typically used to test whether a particular extesion
1730 fflushall (fflushall.U):
1731 This symbol, if defined, tells that to flush
1732 all pending stdio output one must loop through all
1733 the stdio file handles stored in an array and fflush them.
1734 Note that if fflushNULL is defined, fflushall will not
1735 even be probed for and will be left undefined.
1737 fflushNULL (fflushall.U):
1738 This symbol, if defined, tells that fflush(NULL) does flush
1739 all pending stdio output.
1742 This variable is defined but not used by Configure.
1743 The value is a plain '' and is not useful.
1745 firstmakefile (Unix.U):
1746 This variable defines the first file searched by make. On unix,
1747 it is makefile (then Makefile). On case-insensitive systems,
1748 it might be something else. This is only used to deal with
1749 convoluted make depend tricks.
1752 This variable is defined but not used by Configure.
1753 The value is a plain '' and is not useful.
1755 fpossize (fpossize.U):
1756 This variable contains the size of a fpostype in bytes.
1758 fpostype (fpostype.U):
1759 This variable defines Fpos_t to be something like fpos_t, long,
1760 uint, or whatever type is used to declare file positions in libc.
1762 freetype (mallocsrc.U):
1763 This variable contains the return type of free(). It is usually
1764 void, but occasionally int.
1767 This variable contains the full pathname to 'ar', whether or
1768 not the user has specified 'portability'. This is only used
1772 This variable contains the full pathname to 'csh', whether or
1773 not the user has specified 'portability'. This is only used
1774 in the compiled C program, and we assume that all systems which
1775 can share this executable will have the same full pathname to
1778 full_sed (Loc_sed.U):
1779 This variable contains the full pathname to 'sed', whether or
1780 not the user has specified 'portability'. This is only used
1781 in the compiled C program, and we assume that all systems which
1782 can share this executable will have the same full pathname to
1786 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1787 indicate whether the compiler is version 1 or 2. This is used in
1788 setting some of the default cflags. It is set to '' if not gcc.
1791 This variable contains the format string used for printing a Gid_t.
1793 gidsign (gidsign.U):
1794 This variable contains the signedness of a gidtype.
1795 1 for unsigned, -1 for signed.
1797 gidsize (gidsize.U):
1798 This variable contains the size of a gidtype in bytes.
1800 gidtype (gidtype.U):
1801 This variable defines Gid_t to be something like gid_t, int,
1802 ushort, or whatever type is used to declare the return type
1803 of getgid(). Typically, it is the type of group ids in the kernel.
1806 This variable holds the general path (space-separated) used to
1807 find libraries. It may contain directories that do not exist on
1808 this platform, libpth is the cleaned-up version.
1811 This variable is used internally by Configure to determine the
1812 full pathname (if any) of the grep program. After Configure runs,
1813 the value is reset to a plain "grep" and is not useful.
1816 This variable contains a command that produces the text of the
1817 /etc/group file. This is normally "cat /etc/group", but can be
1818 "ypcat group" when NIS is used.
1819 On some systems, such as os390, there may be no equivalent
1820 command, in which case this variable is unset.
1822 groupstype (groupstype.U):
1823 This variable defines Groups_t to be something like gid_t, int,
1824 ushort, or whatever type is used for the second argument to
1825 getgroups() and setgroups(). Usually, this is the same as
1826 gidtype (gid_t), but sometimes it isn't.
1829 This variable is used internally by Configure to determine the
1830 full pathname (if any) of the gzip program. After Configure runs,
1831 the value is reset to a plain "gzip" and is not useful.
1833 h_fcntl (h_fcntl.U):
1834 This is variable gets set in various places to tell i_fcntl that
1835 <fcntl.h> should be included.
1837 h_sysfile (h_sysfile.U):
1838 This is variable gets set in various places to tell i_sys_file that
1839 <sys/file.h> should be included.
1842 Gives the type of hints used for previous answers. May be one of
1843 "default", "recommended" or "previous".
1846 This variable contains a command that produces the text of the
1847 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1848 "ypcat hosts" when NIS is used.
1849 On some systems, such as os390, there may be no equivalent
1850 command, in which case this variable is unset.
1853 This variable contains a flag which will tell the C compiler and loader
1854 to produce a program running with a huge memory model. If the
1855 huge model is not supported, contains the flag to produce large
1856 model programs. It is up to the Makefile to use this.
1859 This variable is the size of an I16 in bytes.
1862 This variable contains the C type used for Perl's I16.
1865 This variable is the size of an I32 in bytes.
1868 This variable contains the C type used for Perl's I32.
1871 This variable is the size of an I64 in bytes.
1874 This variable contains the C type used for Perl's I64.
1877 This variable is the size of an I8 in bytes.
1880 This variable contains the C type used for Perl's I8.
1882 i_arpainet (i_arpainet.U):
1883 This variable conditionally defines the I_ARPA_INET symbol,
1884 and indicates whether a C program should include <arpa/inet.h>.
1886 i_bsdioctl (i_sysioctl.U):
1887 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1888 indicates to the C program that <sys/bsdioctl.h> exists and should
1892 This variable conditionally defines the I_DB symbol, and indicates
1893 whether a C program may include Berkeley's DB include file <db.h>.
1896 This variable conditionally defines the I_DBM symbol, which
1897 indicates to the C program that <dbm.h> exists and should
1900 i_dirent (i_dirent.U):
1901 This variable conditionally defines I_DIRENT, which indicates
1902 to the C program that it should include <dirent.h>.
1905 This variable conditionally defines the I_DLD symbol, which
1906 indicates to the C program that <dld.h> (GNU dynamic loading)
1907 exists and should be included.
1909 i_dlfcn (i_dlfcn.U):
1910 This variable conditionally defines the I_DLFCN symbol, which
1911 indicates to the C program that <dlfcn.h> exists and should
1914 i_fcntl (i_fcntl.U):
1915 This variable controls the value of I_FCNTL (which tells
1916 the C program to include <fcntl.h>).
1918 i_float (i_float.U):
1919 This variable conditionally defines the I_FLOAT symbol, and indicates
1920 whether a C program may include <float.h> to get symbols like DBL_MAX
1921 or DBL_MIN, i.e. machine dependent floating point values.
1924 This variable conditionally defines the I_GDBM symbol, which
1925 indicates to the C program that <gdbm.h> exists and should
1929 This variable conditionally defines the I_GRP symbol, and indicates
1930 whether a C program should include <grp.h>.
1932 i_iconv (i_iconv.U):
1933 This variable conditionally defines the I_ICONV symbol, and indicates
1934 whether a C program should include <iconv.h>.
1936 i_ieeefp (i_ieeefp.U):
1937 This variable conditionally defines the I_IEEEFP symbol, and indicates
1938 whether a C program should include <ieeefp.h>.
1940 i_inttypes (i_inttypes.U):
1941 This variable conditionally defines the I_INTTYPES symbol,
1942 and indicates whether a C program should include <inttypes.h>.
1944 i_limits (i_limits.U):
1945 This variable conditionally defines the I_LIMITS symbol, and indicates
1946 whether a C program may include <limits.h> to get symbols like WORD_BIT
1949 i_locale (i_locale.U):
1950 This variable conditionally defines the I_LOCALE symbol,
1951 and indicates whether a C program should include <locale.h>.
1953 i_machcthr (i_machcthr.U):
1954 This variable conditionally defines the I_MACH_CTHREADS symbol,
1955 and indicates whether a C program should include <mach/cthreads.h>.
1957 i_malloc (i_malloc.U):
1958 This variable conditionally defines the I_MALLOC symbol, and indicates
1959 whether a C program should include <malloc.h>.
1962 This variable conditionally defines the I_MATH symbol, and indicates
1963 whether a C program may include <math.h>.
1965 i_memory (i_memory.U):
1966 This variable conditionally defines the I_MEMORY symbol, and indicates
1967 whether a C program should include <memory.h>.
1969 i_mntent (i_mntent.U):
1970 This variable conditionally defines the I_MNTENT symbol, and indicates
1971 whether a C program should include <mntent.h>.
1974 This variable conditionally defines the I_NDBM symbol, which
1975 indicates to the C program that <ndbm.h> exists and should
1978 i_netdb (i_netdb.U):
1979 This variable conditionally defines the I_NETDB symbol, and indicates
1980 whether a C program should include <netdb.h>.
1982 i_neterrno (i_neterrno.U):
1983 This variable conditionally defines the I_NET_ERRNO symbol, which
1984 indicates to the C program that <net/errno.h> exists and should
1987 i_netinettcp (i_netinettcp.U):
1988 This variable conditionally defines the I_NETINET_TCP symbol,
1989 and indicates whether a C program should include <netinet/tcp.h>.
1992 This variable conditionally defines I_NETINET_IN, which indicates
1993 to the C program that it should include <netinet/in.h>. Otherwise,
1994 you may try <sys/in.h>.
1997 This variable conditionally defines the I_POLL symbol, and indicates
1998 whether a C program should include <poll.h>.
2000 i_pthread (i_pthread.U):
2001 This variable conditionally defines the I_PTHREAD symbol,
2002 and indicates whether a C program should include <pthread.h>.
2005 This variable conditionally defines I_PWD, which indicates
2006 to the C program that it should include <pwd.h>.
2008 i_rpcsvcdbm (i_dbm.U):
2009 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2010 indicates to the C program that <rpcsvc/dbm.h> exists and should
2011 be included. Some System V systems might need this instead of <dbm.h>.
2014 This variable conditionally defines the I_SFIO symbol,
2015 and indicates whether a C program should include <sfio.h>.
2017 i_sgtty (i_termio.U):
2018 This variable conditionally defines the I_SGTTY symbol, which
2019 indicates to the C program that it should include <sgtty.h> rather
2022 i_shadow (i_shadow.U):
2023 This variable conditionally defines the I_SHADOW symbol, and indicates
2024 whether a C program should include <shadow.h>.
2026 i_socks (i_socks.U):
2027 This variable conditionally defines the I_SOCKS symbol, and indicates
2028 whether a C program should include <socks.h>.
2030 i_stdarg (i_varhdr.U):
2031 This variable conditionally defines the I_STDARG symbol, which
2032 indicates to the C program that <stdarg.h> exists and should
2035 i_stddef (i_stddef.U):
2036 This variable conditionally defines the I_STDDEF symbol, which
2037 indicates to the C program that <stddef.h> exists and should
2040 i_stdlib (i_stdlib.U):
2041 This variable conditionally defines the I_STDLIB symbol, which
2042 indicates to the C program that <stdlib.h> exists and should
2045 i_string (i_string.U):
2046 This variable conditionally defines the I_STRING symbol, which
2047 indicates that <string.h> should be included rather than <strings.h>.
2049 i_sunmath (i_sunmath.U):
2050 This variable conditionally defines the I_SUNMATH symbol, and indicates
2051 whether a C program should include <sunmath.h>.
2053 i_sysaccess (i_sysaccess.U):
2054 This variable conditionally defines the I_SYS_ACCESS symbol,
2055 and indicates whether a C program should include <sys/access.h>.
2057 i_sysdir (i_sysdir.U):
2058 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2059 whether a C program should include <sys/dir.h>.
2061 i_sysfile (i_sysfile.U):
2062 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2063 whether a C program should include <sys/file.h> to get R_OK and friends.
2065 i_sysfilio (i_sysioctl.U):
2066 This variable conditionally defines the I_SYS_FILIO symbol, which
2067 indicates to the C program that <sys/filio.h> exists and should
2068 be included in preference to <sys/ioctl.h>.
2071 This variable conditionally defines I_SYS_IN, which indicates
2072 to the C program that it should include <sys/in.h> instead of
2075 i_sysioctl (i_sysioctl.U):
2076 This variable conditionally defines the I_SYS_IOCTL symbol, which
2077 indicates to the C program that <sys/ioctl.h> exists and should
2080 i_syslog (i_syslog.U):
2081 This variable conditionally defines the I_SYSLOG symbol,
2082 and indicates whether a C program should include <syslog.h>.
2084 i_sysmman (i_sysmman.U):
2085 This variable conditionally defines the I_SYS_MMAN symbol, and
2086 indicates whether a C program should include <sys/mman.h>.
2088 i_sysmode (i_sysmode.U):
2089 This variable conditionally defines the I_SYSMODE symbol,
2090 and indicates whether a C program should include <sys/mode.h>.
2092 i_sysmount (i_sysmount.U):
2093 This variable conditionally defines the I_SYSMOUNT symbol,
2094 and indicates whether a C program should include <sys/mount.h>.
2096 i_sysndir (i_sysndir.U):
2097 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2098 whether a C program should include <sys/ndir.h>.
2100 i_sysparam (i_sysparam.U):
2101 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2102 whether a C program should include <sys/param.h>.
2104 i_sysresrc (i_sysresrc.U):
2105 This variable conditionally defines the I_SYS_RESOURCE symbol,
2106 and indicates whether a C program should include <sys/resource.h>.
2108 i_syssecrt (i_syssecrt.U):
2109 This variable conditionally defines the I_SYS_SECURITY symbol,
2110 and indicates whether a C program should include <sys/security.h>.
2112 i_sysselct (i_sysselct.U):
2113 This variable conditionally defines I_SYS_SELECT, which indicates
2114 to the C program that it should include <sys/select.h> in order to
2115 get the definition of struct timeval.
2117 i_syssockio (i_sysioctl.U):
2118 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2119 C program that socket ioctl codes may be found in <sys/sockio.h>
2120 instead of <sys/ioctl.h>.
2122 i_sysstat (i_sysstat.U):
2123 This variable conditionally defines the I_SYS_STAT symbol,
2124 and indicates whether a C program should include <sys/stat.h>.
2126 i_sysstatfs (i_sysstatfs.U):
2127 This variable conditionally defines the I_SYSSTATFS symbol,
2128 and indicates whether a C program should include <sys/statfs.h>.
2130 i_sysstatvfs (i_sysstatvfs.U):
2131 This variable conditionally defines the I_SYSSTATVFS symbol,
2132 and indicates whether a C program should include <sys/statvfs.h>.
2134 i_systime (i_time.U):
2135 This variable conditionally defines I_SYS_TIME, which indicates
2136 to the C program that it should include <sys/time.h>.
2138 i_systimek (i_time.U):
2139 This variable conditionally defines I_SYS_TIME_KERNEL, which
2140 indicates to the C program that it should include <sys/time.h>
2141 with KERNEL defined.
2143 i_systimes (i_systimes.U):
2144 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2145 whether a C program should include <sys/times.h>.
2147 i_systypes (i_systypes.U):
2148 This variable conditionally defines the I_SYS_TYPES symbol,
2149 and indicates whether a C program should include <sys/types.h>.
2151 i_sysuio (i_sysuio.U):
2152 This variable conditionally defines the I_SYSUIO symbol, and indicates
2153 whether a C program should include <sys/uio.h>.
2155 i_sysun (i_sysun.U):
2156 This variable conditionally defines I_SYS_UN, which indicates
2157 to the C program that it should include <sys/un.h> to get UNIX
2158 domain socket definitions.
2160 i_sysutsname (i_sysutsname.U):
2161 This variable conditionally defines the I_SYSUTSNAME symbol,
2162 and indicates whether a C program should include <sys/utsname.h>.
2164 i_sysvfs (i_sysvfs.U):
2165 This variable conditionally defines the I_SYSVFS symbol,
2166 and indicates whether a C program should include <sys/vfs.h>.
2168 i_syswait (i_syswait.U):
2169 This variable conditionally defines I_SYS_WAIT, which indicates
2170 to the C program that it should include <sys/wait.h>.
2172 i_termio (i_termio.U):
2173 This variable conditionally defines the I_TERMIO symbol, which
2174 indicates to the C program that it should include <termio.h> rather
2177 i_termios (i_termio.U):
2178 This variable conditionally defines the I_TERMIOS symbol, which
2179 indicates to the C program that the POSIX <termios.h> file is
2183 This variable conditionally defines I_TIME, which indicates
2184 to the C program that it should include <time.h>.
2186 i_unistd (i_unistd.U):
2187 This variable conditionally defines the I_UNISTD symbol, and indicates
2188 whether a C program should include <unistd.h>.
2190 i_ustat (i_ustat.U):
2191 This variable conditionally defines the I_USTAT symbol, and indicates
2192 whether a C program should include <ustat.h>.
2194 i_utime (i_utime.U):
2195 This variable conditionally defines the I_UTIME symbol, and indicates
2196 whether a C program should include <utime.h>.
2198 i_values (i_values.U):
2199 This variable conditionally defines the I_VALUES symbol, and indicates
2200 whether a C program may include <values.h> to get symbols like MAXLONG
2203 i_varargs (i_varhdr.U):
2204 This variable conditionally defines I_VARARGS, which indicates
2205 to the C program that it should include <varargs.h>.
2207 i_varhdr (i_varhdr.U):
2208 Contains the name of the header to be included to get va_dcl definition.
2209 Typically one of varargs.h or stdarg.h.
2211 i_vfork (i_vfork.U):
2212 This variable conditionally defines the I_VFORK symbol, and indicates
2213 whether a C program should include vfork.h.
2215 ignore_versioned_solibs (libs.U):
2216 This variable should be non-empty if non-versioned shared
2217 libraries (libfoo.so.x.y) are to be ignored (because they
2218 cannot be linked against).
2220 inc_version_list (inc_version_list.U):
2221 This variable specifies the list of subdirectories in over
2222 which perl.c:incpush() and lib/lib.pm will automatically
2223 search when adding directories to @INC. The elements in
2224 the list are separated by spaces. This is only useful
2225 if you have a perl library directory tree structured like the
2226 default one. See INSTALL for how this works. The versioned
2227 site_perl directory was introduced in 5.005, so that is the
2228 lowest possible value.
2230 inc_version_list_init (inc_version_list.U):
2231 This variable holds the same list as inc_version_list, but
2232 each item is enclosed in double quotes and separated by commas,
2233 suitable for use in the PERL_INC_VERSION_LIST initialization.
2236 This variable must preceed the normal include path to get hte
2237 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2238 Value can be "" or "/bsd43" on mips.
2241 This variable is defined but not used by Configure.
2242 The value is a plain '' and is not useful.
2244 installarchlib (archlib.U):
2245 This variable is really the same as archlibexp but may differ on
2246 those systems using AFS. For extra portability, only this variable
2247 should be used in makefiles.
2250 This variable is the same as binexp unless AFS is running in which case
2251 the user is explicitely prompted for it. This variable should always
2252 be used in your makefiles for maximum portability.
2254 installman1dir (man1dir.U):
2255 This variable is really the same as man1direxp, unless you are using
2256 AFS in which case it points to the read/write location whereas
2257 man1direxp only points to the read-only access location. For extra
2258 portability, you should only use this variable within your makefiles.
2260 installman3dir (man3dir.U):
2261 This variable is really the same as man3direxp, unless you are using
2262 AFS in which case it points to the read/write location whereas
2263 man3direxp only points to the read-only access location. For extra
2264 portability, you should only use this variable within your makefiles.
2266 installprefix (installprefix.U):
2267 This variable holds the name of the directory below which
2268 "make install" will install the package. For most users, this
2269 is the same as prefix. However, it is useful for
2270 installing the software into a different (usually temporary)
2271 location after which it can be bundled up and moved somehow
2272 to the final location specified by prefix.
2274 installprefixexp (installprefix.U):
2275 This variable holds the full absolute path of installprefix
2276 with all ~-expansion done.
2278 installprivlib (privlib.U):
2279 This variable is really the same as privlibexp but may differ on
2280 those systems using AFS. For extra portability, only this variable
2281 should be used in makefiles.
2283 installscript (scriptdir.U):
2284 This variable is usually the same as scriptdirexp, unless you are on
2285 a system running AFS, in which case they may differ slightly. You
2286 should always use this variable within your makefiles for portability.
2288 installsitearch (sitearch.U):
2289 This variable is really the same as sitearchexp but may differ on
2290 those systems using AFS. For extra portability, only this variable
2291 should be used in makefiles.
2293 installsitebin (sitebin.U):
2294 This variable is usually the same as sitebinexp, unless you are on
2295 a system running AFS, in which case they may differ slightly. You
2296 should always use this variable within your makefiles for portability.
2298 installsitelib (sitelib.U):
2299 This variable is really the same as sitelibexp but may differ on
2300 those systems using AFS. For extra portability, only this variable
2301 should be used in makefiles.
2303 installstyle (installstyle.U):
2304 This variable describes the "style" of the perl installation.
2305 This is intended to be useful for tools that need to
2306 manipulate entire perl distributions. Perl itself doesn't use
2307 this to find its libraries -- the library directories are
2308 stored directly in Config.pm. Currently, there are only two
2309 styles: "lib" and "lib/perl5". The default library locations
2310 (e.g. privlib, sitelib) are either $prefix/lib or
2311 $prefix/lib/perl5. The former is useful if $prefix is a
2312 directory dedicated to perl (e.g. /opt/perl), while the latter
2313 is useful if $prefix is shared by many packages, e.g. if
2315 This may later be extended to include other information, so
2316 be careful with pattern-matching on the results.
2317 For compatibility with perl5.005 and earlier, the default
2318 setting is based on whether or not $prefix contains the string
2321 installusrbinperl (instubperl.U):
2322 This variable tells whether Perl should be installed also as
2323 /usr/bin/perl in addition to
2326 installvendorarch (vendorarch.U):
2327 This variable is really the same as vendorarchexp but may differ on
2328 those systems using AFS. For extra portability, only this variable
2329 should be used in makefiles.
2331 installvendorbin (vendorbin.U):
2332 This variable is really the same as vendorbinexp but may differ on
2333 those systems using AFS. For extra portability, only this variable
2334 should be used in makefiles.
2336 installvendorlib (vendorlib.U):
2337 This variable is really the same as vendorlibexp but may differ on
2338 those systems using AFS. For extra portability, only this variable
2339 should be used in makefiles.
2341 intsize (intsize.U):
2342 This variable contains the value of the INTSIZE symbol, which
2343 indicates to the C program how many bytes there are in an int.
2345 ivdformat (perlxvf.U):
2346 This variable contains the format string used for printing
2347 a Perl IV as a signed decimal integer.
2350 This variable is the size of an IV in bytes.
2353 This variable contains the C type used for Perl's IV.
2355 known_extensions (Extensions.U):
2356 This variable holds a list of all XS extensions included in
2360 This variable is defined but not used by Configure.
2361 The value is a plain '' and is not useful.
2364 This variable contains a flag which will tell the C compiler and loader
2365 to produce a program running with a large memory model. It is up to
2366 the Makefile to use this.
2369 This variable indicates the program to be used to link
2370 libraries for dynamic loading. On some systems, it is 'ld'.
2371 On ELF systems, it should be $cc. Mostly, we'll try to respect
2372 the hint file setting.
2374 lddlflags (dlsrc.U):
2375 This variable contains any special flags that might need to be
2376 passed to $ld to create a shared library suitable for dynamic
2377 loading. It is up to the makefile to use it. For hpux, it
2378 should be '-b'. For sunos 4.1, it is empty.
2380 ldflags (ccflags.U):
2381 This variable contains any additional C loader flags desired by
2382 the user. It is up to the Makefile to use this.
2384 ldlibpthname (libperl.U):
2385 This variable holds the name of the shared library
2386 search path, often LD_LIBRARY_PATH. To get an empty
2387 string, the hints file must set this to 'none'.
2390 This variable is used internally by Configure to determine the
2391 full pathname (if any) of the less program. After Configure runs,
2392 the value is reset to a plain "less" and is not useful.
2395 This is an old synonym for _a.
2398 This variable contains the location of the C library.
2400 libperl (libperl.U):
2401 The perl executable is obtained by linking perlmain.c with
2402 libperl, any static extensions (usually just DynaLoader),
2403 and any other libraries needed on this system. libperl
2404 is usually libperl.a, but can also be libperl.so.xxx if
2405 the user wishes to build a perl executable with a shared
2409 This variable holds the general path (space-separated) used to find
2410 libraries. It is intended to be used by other units.
2413 This variable holds the additional libraries we want to use.
2414 It is up to the Makefile to deal with it.
2417 This variable holds the directory names aka dirnames of the libraries
2418 we found and accepted, duplicates are removed.
2421 This variable holds the filenames aka basenames of the libraries
2422 we found and accepted.
2425 This variable holds the full pathnames of the libraries
2426 we found and accepted.
2429 This variable holds the directory names probed for libraries.
2431 libswanted (Myinit.U):
2432 This variable holds a list of all the libraries we want to
2433 search. The order is chosen to pick up the c library
2434 ahead of ucb or bsd libraries for SVR4.
2437 This variable is defined but not used by Configure.
2438 The value is a plain '' and is not useful.
2441 This variable is defined but not used by Configure.
2442 The value is a plain '' and is not useful.
2444 lkflags (ccflags.U):
2445 This variable contains any additional C partial linker flags desired by
2446 the user. It is up to the Makefile to use this.
2449 This variable is used internally by Configure to determine the
2450 full pathname (if any) of the ln program. After Configure runs,
2451 the value is reset to a plain "ln" and is not useful.
2454 This variable holds the name of the command to make
2455 symbolic links (if they are supported). It can be used
2456 in the Makefile. It is either 'ln -s' or 'ln'
2458 locincpth (ccflags.U):
2459 This variable contains a list of additional directories to be
2460 searched by the compiler. The appropriate '-I' directives will
2461 be added to ccflags. This is intended to simplify setting
2462 local directories from the Configure command line.
2463 It's not much, but it parallels the loclibpth stuff in libpth.U.
2465 loclibpth (libpth.U):
2466 This variable holds the paths (space-separated) used to find local
2467 libraries. It is prepended to libpth, and is intended to be easily
2468 set from the command line.
2470 longdblsize (d_longdbl.U):
2471 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2472 indicates to the C program how many bytes there are in a long double,
2473 if this system supports long doubles.
2475 longlongsize (d_longlong.U):
2476 This variable contains the value of the LONGLONGSIZE symbol, which
2477 indicates to the C program how many bytes there are in a long long,
2478 if this system supports long long.
2480 longsize (intsize.U):
2481 This variable contains the value of the LONGSIZE symbol, which
2482 indicates to the C program how many bytes there are in a long.
2485 This variable is defined but not used by Configure.
2486 The value is a plain '' and is not useful.
2489 This variable is defined but not used by Configure.
2490 The value is a plain '' and is not useful.
2493 This variable is used internally by Configure to determine the
2494 full pathname (if any) of the ls program. After Configure runs,
2495 the value is reset to a plain "ls" and is not useful.
2497 lseeksize (lseektype.U):
2498 This variable defines lseektype to be something like off_t, long,
2499 or whatever type is used to declare lseek offset's type in the
2500 kernel (which also appears to be lseek's return type).
2502 lseektype (lseektype.U):
2503 This variable defines lseektype to be something like off_t, long,
2504 or whatever type is used to declare lseek offset's type in the
2505 kernel (which also appears to be lseek's return type).
2508 This variable is defined but not used by Configure.
2509 The value is a plain '' and is not useful.
2512 This variable is defined but not used by Configure.
2513 The value is a plain '' and is not useful.
2516 This variable is used internally by Configure to determine the
2517 full pathname (if any) of the make program. After Configure runs,
2518 the value is reset to a plain "make" and is not useful.
2520 make_set_make (make.U):
2521 Some versions of 'make' set the variable MAKE. Others do not.
2522 This variable contains the string to be included in Makefile.SH
2523 so that MAKE is set if needed, and not if not needed.
2524 Possible values are:
2525 make_set_make='#' # If your make program handles this for you,
2526 make_set_make="MAKE=$make" # if it doesn't.
2527 I used a comment character so that we can distinguish a
2528 'set' value (from a previous config.sh or Configure '-D' option)
2529 from an uncomputed value.
2531 mallocobj (mallocsrc.U):
2532 This variable contains the name of the malloc.o that this package
2533 generates, if that malloc.o is preferred over the system malloc.
2534 Otherwise the value is null. This variable is intended for generating
2535 Makefiles. See mallocsrc.
2537 mallocsrc (mallocsrc.U):
2538 This variable contains the name of the malloc.c that comes with
2539 the package, if that malloc.c is preferred over the system malloc.
2540 Otherwise the value is null. This variable is intended for generating
2543 malloctype (mallocsrc.U):
2544 This variable contains the kind of ptr returned by malloc and realloc.
2546 man1dir (man1dir.U):
2547 This variable contains the name of the directory in which manual
2548 source pages are to be put. It is the responsibility of the
2549 Makefile.SH to get the value of this into the proper command.
2550 You must be prepared to do the ~name expansion yourself.
2552 man1direxp (man1dir.U):
2553 This variable is the same as the man1dir variable, but is filename
2554 expanded at configuration time, for convenient use in makefiles.
2556 man1ext (man1dir.U):
2557 This variable contains the extension that the manual page should
2558 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2561 man3dir (man3dir.U):
2562 This variable contains the name of the directory in which manual
2563 source pages are to be put. It is the responsibility of the
2564 Makefile.SH to get the value of this into the proper command.
2565 You must be prepared to do the ~name expansion yourself.
2567 man3direxp (man3dir.U):
2568 This variable is the same as the man3dir variable, but is filename
2569 expanded at configuration time, for convenient use in makefiles.
2571 man3ext (man3dir.U):
2572 This variable contains the extension that the manual page should
2573 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2577 This variable is used internally by Configure to determine the
2578 full pathname (if any) of the Mcc program. After Configure runs,
2579 the value is reset to a plain "Mcc" and is not useful.
2582 This variable contains a flag which will tell the C compiler and loader
2583 to produce a program running with a medium memory model. If the
2584 medium model is not supported, contains the flag to produce large
2585 model programs. It is up to the Makefile to use this.
2587 mips_type (usrinc.U):
2588 This variable holds the environment type for the mips system.
2589 Possible values are "BSD 4.3" and "System V".
2592 This variable is used internally by Configure to determine the
2593 full pathname (if any) of the mkdir program. After Configure runs,
2594 the value is reset to a plain "mkdir" and is not useful.
2596 mmaptype (d_mmap.U):
2597 This symbol contains the type of pointer returned by mmap()
2598 (and simultaneously the type of the first argument).
2599 It can be 'void *' or 'caddr_t'.
2602 This variable contains the list of memory models supported by this
2603 system. Possible component values are none, split, unsplit, small,
2604 medium, large, and huge. The component values are space separated.
2606 modetype (modetype.U):
2607 This variable defines modetype to be something like mode_t,
2608 int, unsigned short, or whatever type is used to declare file
2609 modes for system calls.
2612 This variable is used internally by Configure to determine the
2613 full pathname (if any) of the more program. After Configure runs,
2614 the value is reset to a plain "more" and is not useful.
2616 multiarch (multiarch.U):
2617 This variable conditionally defines the MULTIARCH symbol
2618 which signifies the presence of multiplatform files.
2619 This is normally set by hints files.
2622 This variable is defined but not used by Configure.
2623 The value is a plain '' and is not useful.
2625 myarchname (archname.U):
2626 This variable holds the architecture name computed by Configure in
2627 a previous run. It is not intended to be perused by any user and
2628 should never be set in a hint file.
2630 mydomain (myhostname.U):
2631 This variable contains the eventual value of the MYDOMAIN symbol,
2632 which is the domain of the host the program is going to run on.
2633 The domain must be appended to myhostname to form a complete host name.
2634 The dot comes with mydomain, and need not be supplied by the program.
2636 myhostname (myhostname.U):
2637 This variable contains the eventual value of the MYHOSTNAME symbol,
2638 which is the name of the host the program is going to run on.
2639 The domain is not kept with hostname, but must be gotten from mydomain.
2640 The dot comes with mydomain, and need not be supplied by the program.
2642 myuname (Oldconfig.U):
2643 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2644 pseudo variables assignments in the output are stripped, thank you. The
2645 whole thing is then lower-cased.
2648 This variable contains the '-n' flag if that is what causes the echo
2649 command to suppress newline. Otherwise it is null. Correct usage is
2650 $echo $n "prompt for a question: $c".
2652 netdb_hlen_type (netdbtype.U):
2653 This variable holds the type used for the 2nd argument to
2654 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2655 This is only useful if you have gethostbyaddr(), naturally.
2657 netdb_host_type (netdbtype.U):
2658 This variable holds the type used for the 1st argument to
2659 gethostbyaddr(). Usually, this is char * or void *, possibly
2660 with or without a const prefix.
2661 This is only useful if you have gethostbyaddr(), naturally.
2663 netdb_name_type (netdbtype.U):
2664 This variable holds the type used for the argument to
2665 gethostbyname(). Usually, this is char * or const char *.
2666 This is only useful if you have gethostbyname(), naturally.
2668 netdb_net_type (netdbtype.U):
2669 This variable holds the type used for the 1st argument to
2670 getnetbyaddr(). Usually, this is int or long.
2671 This is only useful if you have getnetbyaddr(), naturally.
2674 This variable is used internally by Configure to determine the
2675 full pathname (if any) of the nm program. After Configure runs,
2676 the value is reset to a plain "nm" and is not useful.
2679 This variable holds the options that may be necessary for nm.
2681 nm_so_opt (usenm.U):
2682 This variable holds the options that may be necessary for nm
2683 to work on a shared library but that can not be used on an
2684 archive library. Currently, this is only used by Linux, where
2685 nm --dynamic is *required* to get symbols from an ELF library which
2686 has been stripped, but nm --dynamic is *fatal* on an archive library.
2687 Maybe Linux should just always set usenm=false.
2689 nonxs_ext (Extensions.U):
2690 This variable holds a list of all non-xs extensions included
2691 in the package. All of them will be built.
2694 This variable is used internally by Configure to determine the
2695 full pathname (if any) of the nroff program. After Configure runs,
2696 the value is reset to a plain "nroff" and is not useful.
2699 This variable is the size of an NV in bytes.
2702 This variable contains the C type used for Perl's NV.
2704 o_nonblock (nblock_io.U):
2705 This variable bears the symbol value to be used during open() or fcntl()
2706 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2707 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2708 but that is only supported by some devices.
2711 This is an old synonym for _o.
2713 old_pthread_create_joinable (d_pthrattrj.U):
2714 This variable defines the constant to use for creating joinable
2715 (aka undetached) pthreads. Unused if pthread.h defines
2716 PTHREAD_CREATE_JOINABLE. If used, possible values are
2717 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2719 optimize (ccflags.U):
2720 This variable contains any optimizer/debugger flag that should be used.
2721 It is up to the Makefile to use it.
2723 orderlib (orderlib.U):
2724 This variable is "true" if the components of libraries must be ordered
2725 (with `lorder $* | tsort`) before placing them in an archive. Set to
2726 "false" if ranlib or ar can generate random libraries.
2728 osname (Oldconfig.U):
2729 This variable contains the operating system name (e.g. sunos,
2730 solaris, hpux, etc.). It can be useful later on for setting
2731 defaults. Any spaces are replaced with underscores. It is set
2732 to a null string if we can't figure it out.
2734 osvers (Oldconfig.U):
2735 This variable contains the operating system version (e.g.
2736 4.1.3, 5.2, etc.). It is primarily used for helping select
2737 an appropriate hints file, but might be useful elsewhere for
2738 setting defaults. It is set to '' if we can't figure it out.
2739 We try to be flexible about how much of the version number
2740 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2741 same for this package, hints files might just be os_4.0 or
2742 os_4.1, etc., not keeping separate files for each little release.
2744 package (package.U):
2745 This variable contains the name of the package being constructed.
2746 It is primarily intended for the use of later Configure units.
2749 This variable contains the name of the preferred pager on the system.
2750 Usual values are (the full pathnames of) more, less, pg, or cat.
2753 This variable contains a command that produces the text of the
2754 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2755 "ypcat passwd" when NIS is used.
2756 On some systems, such as os390, there may be no equivalent
2757 command, in which case this variable is unset.
2759 patchlevel (patchlevel.U):
2760 The patchlevel level of this package.
2761 The value of patchlevel comes from the patchlevel.h file.
2762 In a version number such as 5.6.1, this is the "6".
2763 In patchlevel.h, this is referred to as "PERL_VERSION".
2766 This is an old synonym for p_ in Head.U, the character
2767 used to separate elements in the command shell search PATH.
2770 This variable contains the full path (if any) to a previously
2771 installed perl5.005 or later suitable for running the script
2772 to determine inc_version_list.
2775 This variable is defined but not used by Configure.
2776 The value is a plain '' and is not useful.
2778 PERL_REVISION (Oldsyms.U):
2779 In a Perl version number such as 5.6.2, this is the 5.
2780 This value is manually set in patchlevel.h
2782 PERL_SUBVERSION (Oldsyms.U):
2783 In a Perl version number such as 5.6.2, this is the 2.
2784 Values greater than 50 represent potentially unstable
2785 development subversions.
2786 This value is manually set in patchlevel.h
2788 PERL_VERSION (Oldsyms.U):
2789 In a Perl version number such as 5.6.2, this is the 6.
2790 This value is manually set in patchlevel.h
2792 perladmin (perladmin.U):
2793 Electronic mail address of the perl5 administrator.
2795 perlpath (perlpath.U):
2796 This variable contains the eventual value of the PERLPATH symbol,
2797 which contains the name of the perl interpreter to be used in
2798 shell scripts and in the "eval 'exec'" idiom.
2801 This variable is used internally by Configure to determine the
2802 full pathname (if any) of the pg program. After Configure runs,
2803 the value is reset to a plain "pg" and is not useful.
2805 phostname (myhostname.U):
2806 This variable contains the eventual value of the PHOSTNAME symbol,
2807 which is a command that can be fed to popen() to get the host name.
2808 The program should probably not presume that the domain is or isn't
2811 pidtype (pidtype.U):
2812 This variable defines PIDTYPE to be something like pid_t, int,
2813 ushort, or whatever type is used to declare process ids in the kernel.
2816 Holds the private path used by Configure to find out the libraries.
2817 Its value is prepend to libpth. This variable takes care of special
2818 machines, like the mips. Usually, it should be empty.
2820 pm_apiversion (xs_apiversion.U):
2821 This variable contains the version of the oldest perl
2822 compatible with the present perl. (That is, pure perl modules
2823 written for $pm_apiversion will still work for the current
2824 version). perl.c:incpush() and lib/lib.pm will automatically
2825 search in $sitelib for older directories across major versions
2826 back to pm_apiversion. This is only useful if you have a perl
2827 library directory tree structured like the default one. The
2828 versioned site_perl library was introduced in 5.005, so that's
2829 the default setting for this variable. It's hard to imagine
2830 it changing before Perl6. It is included here for symmetry
2831 with xs_apiveprsion -- the searching algorithms will
2832 (presumably) be similar.
2833 See the INSTALL file for how this works.
2836 This variable is defined but not used by Configure.
2837 The value is a plain '' and is not useful.
2840 This variable is defined but not used by Configure.
2841 The value is a plain '' and is not useful.
2844 This variable holds the name of the directory below which the
2845 user will install the package. Usually, this is /usr/local, and
2846 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2847 man pages in /usr/local/man, etc. It is only used to set defaults
2848 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2850 prefixexp (prefix.U):
2851 This variable holds the full absolute path of the directory below
2852 which the user will install the package. Derived from prefix.
2854 privlib (privlib.U):
2855 This variable contains the eventual value of the PRIVLIB symbol,
2856 which is the name of the private library for this package. It may
2857 have a ~ on the front. It is up to the makefile to eventually create
2858 this directory while performing installation (with ~ substitution).
2860 privlibexp (privlib.U):
2861 This variable is the ~name expanded version of privlib, so that you
2862 may use it directly in Makefiles or shell scripts.
2864 prototype (prototype.U):
2865 This variable holds the eventual value of CAN_PROTOTYPE, which
2866 indicates the C compiler can handle funciton prototypes.
2868 ptrsize (ptrsize.U):
2869 This variable contains the value of the PTRSIZE symbol, which
2870 indicates to the C program how many bytes there are in a pointer.
2872 quadkind (quadtype.U):
2873 This variable, if defined, encodes the type of a quad:
2874 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2876 quadtype (quadtype.U):
2877 This variable defines Quad_t to be something like long, int,
2878 long long, int64_t, or whatever type is used for 64-bit integers.
2880 randbits (randfunc.U):
2881 Indicates how many bits are produced by the function used to
2882 generate normalized random numbers.
2884 randfunc (randfunc.U):
2885 Indicates the name of the random number function to use.
2886 Values include drand48, random, and rand. In C programs,
2887 the 'Drand01' macro is defined to generate uniformly distributed
2888 random numbers over the range [0., 1.[ (see drand01 and nrand).
2890 randseedtype (randfunc.U):
2891 Indicates the type of the argument of the seedfunc.
2893 ranlib (orderlib.U):
2894 This variable is set to the pathname of the ranlib program, if it is
2895 needed to generate random libraries. Set to ":" if ar can generate
2896 random libraries or if random libraries are not supported
2898 rd_nodata (nblock_io.U):
2899 This variable holds the return code from read() when no data is
2900 present. It should be -1, but some systems return 0 when O_NDELAY is
2901 used, which is a shame because you cannot make the difference between
2902 no data and an EOF.. Sigh!
2904 revision (patchlevel.U):
2905 The value of revision comes from the patchlevel.h file.
2906 In a version number such as 5.6.1, this is the "5".
2907 In patchlevel.h, this is referred to as "PERL_REVISION".
2910 This variable is used internally by Configure to determine the
2911 full pathname (if any) of the rm program. After Configure runs,
2912 the value is reset to a plain "rm" and is not useful.
2915 This variable is defined but not used by Configure.
2916 The value is a plain '' and is not useful.
2919 This variable contains 'true' or 'false' depending whether the
2920 nm extraction should be performed or not, according to the value
2921 of usenm and the flags on the Configure command line.
2923 sched_yield (d_pthread_y.U):
2924 This variable defines the way to yield the execution
2925 of the current thread.
2927 scriptdir (scriptdir.U):
2928 This variable holds the name of the directory in which the user wants
2929 to put publicly scripts for the package in question. It is either
2930 the same directory as for binaries, or a special one that can be
2931 mounted across different architectures, like /usr/share. Programs
2932 must be prepared to deal with ~name expansion.
2934 scriptdirexp (scriptdir.U):
2935 This variable is the same as scriptdir, but is filename expanded
2936 at configuration time, for programs not wanting to bother with it.
2939 This variable is used internally by Configure to determine the
2940 full pathname (if any) of the sed program. After Configure runs,
2941 the value is reset to a plain "sed" and is not useful.
2943 seedfunc (randfunc.U):
2944 Indicates the random number generating seed function.
2945 Values include srand48, srandom, and srand.
2947 selectminbits (selectminbits.U):
2948 This variable holds the minimum number of bits operated by select.
2949 That is, if you do select(n, ...), how many bits at least will be
2950 cleared in the masks if some activity is detected. Usually this
2951 is either n or 32*ceil(n/32), especially many little-endians do
2952 the latter. This is only useful if you have select(), naturally.
2954 selecttype (selecttype.U):
2955 This variable holds the type used for the 2nd, 3rd, and 4th
2956 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2957 is defined, and 'int *' otherwise. This is only useful if you
2958 have select(), naturally.
2961 This variable is defined but not used by Configure.
2962 The value is a plain '' and is not useful.
2965 This variable contains the full pathname of the shell used
2966 on this system to execute Bourne shell scripts. Usually, this will be
2967 /bin/sh, though it's possible that some systems will have /bin/ksh,
2968 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2970 This unit comes before Options.U, so you can't set sh with a '-D'
2971 option, though you can override this (and startsh)
2972 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2975 This variable is defined but not used by Configure.
2976 The value is a plain '' and is not useful.
2978 sharpbang (spitshell.U):
2979 This variable contains the string #! if this system supports that
2982 shmattype (d_shmat.U):
2983 This symbol contains the type of pointer returned by shmat().
2984 It can be 'void *' or 'char *'.
2986 shortsize (intsize.U):
2987 This variable contains the value of the SHORTSIZE symbol which
2988 indicates to the C program how many bytes there are in a short.
2990 shrpenv (libperl.U):
2991 If the user builds a shared libperl.so, then we need to tell the
2992 'perl' executable where it will be able to find the installed libperl.so.
2993 One way to do this on some systems is to set the environment variable
2994 LD_RUN_PATH to the directory that will be the final location of the
2995 shared libperl.so. The makefile can use this with something like
2996 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2998 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3001 See the main perl Makefile.SH for actual working usage.
3002 Alternatively, we might be able to use a command line option such
3003 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3004 $archlibexp/CORE (Linux).
3006 shsharp (spitshell.U):
3007 This variable tells further Configure units whether your sh can
3010 sig_count (sig_name.U):
3011 This variable holds a number larger than the largest valid
3012 signal number. This is usually the same as the NSIG macro.
3014 sig_name (sig_name.U):
3015 This variable holds the signal names, space separated. The leading
3016 SIG in signal name is removed. A ZERO is prepended to the
3017 list. This is currently not used.
3019 sig_name_init (sig_name.U):
3020 This variable holds the signal names, enclosed in double quotes and
3021 separated by commas, suitable for use in the SIG_NAME definition
3022 below. A "ZERO" is prepended to the list, and the list is
3023 terminated with a plain 0. The leading SIG in signal names
3024 is removed. See sig_num.
3026 sig_num (sig_name.U):
3027 This variable holds the signal numbers, space separated. A ZERO is
3028 prepended to the list (corresponding to the fake SIGZERO), and
3029 the list is terminated with a 0. Those numbers correspond to
3030 the value of the signal listed in the same place within the
3033 sig_num_init (sig_name.U):
3034 This variable holds the signal numbers, enclosed in double quotes and
3035 separated by commas, suitable for use in the SIG_NUM definition
3036 below. A "ZERO" is prepended to the list, and the list is
3037 terminated with a plain 0.
3039 signal_t (d_voidsig.U):
3040 This variable holds the type of the signal handler (void or int).
3042 sitearch (sitearch.U):
3043 This variable contains the eventual value of the SITEARCH symbol,
3044 which is the name of the private library for this package. It may
3045 have a ~ on the front. It is up to the makefile to eventually create
3046 this directory while performing installation (with ~ substitution).
3047 The standard distribution will put nothing in this directory.
3048 After perl has been installed, users may install their own local
3049 architecture-dependent modules in this directory with
3050 MakeMaker Makefile.PL
3051 or equivalent. See INSTALL for details.
3053 sitearchexp (sitearch.U):
3054 This variable is the ~name expanded version of sitearch, so that you
3055 may use it directly in Makefiles or shell scripts.
3057 sitebin (sitebin.U):
3058 This variable holds the name of the directory in which the user wants
3059 to put add-on publicly executable files for the package in question. It
3060 is most often a local directory such as /usr/local/bin. Programs using
3061 this variable must be prepared to deal with ~name substitution.
3062 The standard distribution will put nothing in this directory.
3063 After perl has been installed, users may install their own local
3064 executables in this directory with
3065 MakeMaker Makefile.PL
3066 or equivalent. See INSTALL for details.
3068 sitebinexp (sitebin.U):
3069 This is the same as the sitebin variable, but is filename expanded at
3070 configuration time, for use in your makefiles.
3072 sitelib (sitelib.U):
3073 This variable contains the eventual value of the SITELIB symbol,
3074 which is the name of the private library for this package. It may
3075 have a ~ on the front. It is up to the makefile to eventually create
3076 this directory while performing installation (with ~ substitution).
3077 The standard distribution will put nothing in this directory.
3078 After perl has been installed, users may install their own local
3079 architecture-independent modules in this directory with
3080 MakeMaker Makefile.PL
3081 or equivalent. See INSTALL for details.
3083 sitelib_stem (sitelib.U):
3084 This variable is $sitelibexp with any trailing version-specific component
3085 removed. The elements in inc_version_list (inc_version_list.U) can
3086 be tacked onto this variable to generate a list of directories to search.
3088 sitelibexp (sitelib.U):
3089 This variable is the ~name expanded version of sitelib, so that you
3090 may use it directly in Makefiles or shell scripts.
3092 siteprefix (siteprefix.U):
3093 This variable holds the full absolute path of the directory below
3094 which the user will install add-on packages.
3095 See INSTALL for usage and examples.
3097 siteprefixexp (siteprefix.U):
3098 This variable holds the full absolute path of the directory below
3099 which the user will install add-on packages. Derived from siteprefix.
3101 sizesize (sizesize.U):
3102 This variable contains the size of a sizetype in bytes.
3104 sizetype (sizetype.U):
3105 This variable defines sizetype to be something like size_t,
3106 unsigned long, or whatever type is used to declare length
3107 parameters for string functions.
3110 This variable is defined but not used by Configure.
3111 The value is a plain '' and is not useful.
3114 This variable is defined but not used by Configure.
3115 The value is a plain '' and is not useful.
3118 This variable contains a flag which will tell the C compiler and loader
3119 to produce a program running with a small memory model. It is up to
3120 the Makefile to use this.
3123 This variable holds the extension used to identify shared libraries
3124 (also known as shared objects) on the system. Usually set to 'so'.
3126 sockethdr (d_socket.U):
3127 This variable has any cpp '-I' flags needed for socket support.
3129 socketlib (d_socket.U):
3130 This variable has the names of any libraries needed for socket support.
3132 socksizetype (socksizetype.U):
3133 This variable holds the type used for the size argument
3134 for various socket calls like accept. Usual values include
3135 socklen_t, size_t, and int.
3138 This variable is used internally by Configure to determine the
3139 full pathname (if any) of the sort program. After Configure runs,
3140 the value is reset to a plain "sort" and is not useful.
3142 spackage (package.U):
3143 This variable contains the name of the package being constructed,
3144 with the first letter uppercased, i.e. suitable for starting
3147 spitshell (spitshell.U):
3148 This variable contains the command necessary to spit out a runnable
3149 shell on this system. It is either cat or a grep '-v' for # comments.
3152 This variable contains a flag which will tell the C compiler and loader
3153 to produce a program that will run in separate I and D space, for those
3154 machines that support separation of instruction and data space. It is
3155 up to the Makefile to use this.
3157 sPRId64 (quadfio.U):
3158 This variable, if defined, contains the string used by stdio to
3159 format 64-bit decimal numbers (format 'd') for output.
3161 sPRIeldbl (longdblfio.U):
3162 This variable, if defined, contains the string used by stdio to
3163 format long doubles (format 'e') for output.
3165 sPRIEldbl (longdblfio.U):
3166 This variable, if defined, contains the string used by stdio to
3167 format long doubles (format 'E') for output.
3169 sPRIfldbl (longdblfio.U):
3170 This variable, if defined, contains the string used by stdio to
3171 format long doubles (format 'f') for output.
3173 sPRIFldbl (longdblfio.U):
3174 This variable, if defined, contains the string used by stdio to
3175 format long doubles (format 'F') for output.
3177 sPRIgldbl (longdblfio.U):
3178 This variable, if defined, contains the string used by stdio to
3179 format long doubles (format 'g') for output.
3181 sPRIGldbl (longdblfio.U):
3182 This variable, if defined, contains the string used by stdio to
3183 format long doubles (format 'G') for output.
3185 sPRIi64 (quadfio.U):
3186 This variable, if defined, contains the string used by stdio to
3187 format 64-bit decimal numbers (format 'i') for output.
3189 sPRIo64 (quadfio.U):
3190 This variable, if defined, contains the string used by stdio to
3191 format 64-bit octal numbers (format 'o') for output.
3193 sPRIu64 (quadfio.U):
3194 This variable, if defined, contains the string used by stdio to
3195 format 64-bit unsigned decimal numbers (format 'u') for output.
3197 sPRIx64 (quadfio.U):
3198 This variable, if defined, contains the string used by stdio to
3199 format 64-bit hexadecimal numbers (format 'x') for output.
3201 sPRIX64 (quadfio.U):
3202 This variable, if defined, contains the string used by stdio to
3203 format 64-bit hExADECimAl numbers (format 'X') for output.
3206 This variable holds the path to the package source. It is up to
3207 the Makefile to use this variable and set VPATH accordingly to
3208 find the sources remotely.
3210 ssizetype (ssizetype.U):
3211 This variable defines ssizetype to be something like ssize_t,
3212 long or int. It is used by functions that return a count
3213 of bytes or an error condition. It must be a signed type.
3214 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3216 startperl (startperl.U):
3217 This variable contains the string to put on the front of a perl
3218 script to make sure (hopefully) that it runs with perl and not some
3219 shell. Of course, that leading line must be followed by the classical
3221 eval 'exec perl -S $0 ${1+"$@"}'
3222 if $running_under_some_shell;
3223 to guarantee perl startup should the shell execute the script. Note
3224 that this magic incatation is not understood by csh.
3226 startsh (startsh.U):
3227 This variable contains the string to put on the front of a shell
3228 script to make sure (hopefully) that it runs with sh and not some
3231 static_ext (Extensions.U):
3232 This variable holds a list of XS extension files we want to
3233 link statically into the package. It is used by Makefile.
3235 stdchar (stdchar.U):
3236 This variable conditionally defines STDCHAR to be the type of char
3237 used in stdio.h. It has the values "unsigned char" or "char".
3239 stdio_base (d_stdstdio.U):
3240 This variable defines how, given a FILE pointer, fp, to access the
3241 _base field (or equivalent) of stdio.h's FILE structure. This will
3242 be used to define the macro FILE_base(fp).
3244 stdio_bufsiz (d_stdstdio.U):
3245 This variable defines how, given a FILE pointer, fp, to determine
3246 the number of bytes store in the I/O buffer pointer to by the
3247 _base field (or equivalent) of stdio.h's FILE structure. This will
3248 be used to define the macro FILE_bufsiz(fp).
3250 stdio_cnt (d_stdstdio.U):
3251 This variable defines how, given a FILE pointer, fp, to access the
3252 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3253 be used to define the macro FILE_cnt(fp).
3255 stdio_filbuf (d_stdstdio.U):
3256 This variable defines how, given a FILE pointer, fp, to tell
3257 stdio to refill it's internal buffers (?). This will
3258 be used to define the macro FILE_filbuf(fp).
3260 stdio_ptr (d_stdstdio.U):
3261 This variable defines how, given a FILE pointer, fp, to access the
3262 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3263 be used to define the macro FILE_ptr(fp).
3265 stdio_stream_array (stdio_streams.U):
3266 This variable tells the name of the array holding the stdio streams.
3267 Usual values include _iob, __iob, and __sF.
3269 strings (i_string.U):
3270 This variable holds the full path of the string header that will be
3271 used. Typically /usr/include/string.h or /usr/include/strings.h.
3274 This variable is defined but not used by Configure.
3275 The value is a plain '' and is not useful.
3277 subversion (patchlevel.U):
3278 The subversion level of this package.
3279 The value of subversion comes from the patchlevel.h file.
3280 In a version number such as 5.6.1, this is the "1".
3281 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3282 This is unique to perl.
3285 This variable holds the place where the manual is located on this
3286 system. It is not the place where the user wants to put his manual
3287 pages. Rather it is the place where Configure may look to find manual
3288 for unix commands (section 1 of the manual usually). See mansrc.
3291 This variable is defined but not used by Configure.
3292 The value is a plain '' and is not useful.
3295 This variable is defined but not used by Configure.
3296 The value is a plain '' and is not useful.
3299 This variable is defined but not used by Configure.
3300 The value is a plain '' and is not useful.
3303 This variable is defined but not used by Configure.
3304 The value is a plain '' and is not useful.
3307 This variable is used internally by Configure to determine the
3308 full pathname (if any) of the test program. After Configure runs,
3309 the value is reset to a plain "test" and is not useful.
3311 timeincl (i_time.U):
3312 This variable holds the full path of the included time header(s).
3314 timetype (d_time.U):
3315 This variable holds the type returned by time(). It can be long,
3316 or time_t on BSD sites (in which case <sys/types.h> should be
3317 included). Anyway, the type Time_t should be used.
3320 This variable is used internally by Configure to determine the
3321 full pathname (if any) of the touch program. After Configure runs,
3322 the value is reset to a plain "touch" and is not useful.
3325 This variable is used internally by Configure to determine the
3326 full pathname (if any) of the tr program. After Configure runs,
3327 the value is reset to a plain "tr" and is not useful.
3330 This variable contains the value to be passed to the tr(1)
3331 command to transliterate a newline. Typical values are
3332 '\012' and '\n'. This is needed for EBCDIC systems where
3333 newline is not necessarily '\012'.
3336 This variable is defined but not used by Configure.
3337 The value is a plain '' and is not useful.
3340 This variable is the size of an U16 in bytes.
3343 This variable contains the C type used for Perl's U16.
3346 This variable is the size of an U32 in bytes.
3349 This variable contains the C type used for Perl's U32.
3352 This variable is the size of an U64 in bytes.
3355 This variable contains the C type used for Perl's U64.
3358 This variable is the size of an U8 in bytes.
3361 This variable contains the C type used for Perl's U8.
3364 This variable contains the format string used for printing a Uid_t.
3366 uidsign (uidsign.U):
3367 This variable contains the signedness of a uidtype.
3368 1 for unsigned, -1 for signed.
3370 uidsize (uidsize.U):
3371 This variable contains the size of a uidtype in bytes.
3373 uidtype (uidtype.U):
3374 This variable defines Uid_t to be something like uid_t, int,
3375 ushort, or whatever type is used to declare user ids in the kernel.
3378 This variable is used internally by Configure to determine the
3379 full pathname (if any) of the uname program. After Configure runs,
3380 the value is reset to a plain "uname" and is not useful.
3383 This variable is used internally by Configure to determine the
3384 full pathname (if any) of the uniq program. After Configure runs,
3385 the value is reset to a plain "uniq" and is not useful.
3387 uquadtype (quadtype.U):
3388 This variable defines Uquad_t to be something like unsigned long,
3389 unsigned int, unsigned long long, uint64_t, or whatever type is
3390 used for 64-bit integers.
3392 use5005threads (usethreads.U):
3393 This variable conditionally defines the USE_5005THREADS symbol,
3394 and indicates that Perl should be built to use the 5.005-based
3395 threading implementation.
3397 use64bitall (use64bits.U):
3398 This variable conditionally defines the USE_64_BIT_ALL symbol,
3399 and indicates that 64-bit integer types should be used
3400 when available. The maximal possible
3401 64-bitness is employed: LP64 or ILP64, meaning that you will
3402 be able to use more than 2 gigabytes of memory. This mode is
3403 even more binary incompatible than USE_64_BIT_INT. You may not
3404 be able to run the resulting executable in a 32-bit CPU at all or
3405 you may need at least to reboot your OS to 64-bit mode.
3407 use64bitint (use64bits.U):
3408 This variable conditionally defines the USE_64_BIT_INT symbol,
3409 and indicates that 64-bit integer types should be used
3410 when available. The minimal possible 64-bitness
3411 is employed, just enough to get 64-bit integers into Perl.
3412 This may mean using for example "long longs", while your memory
3413 may still be limited to 2 gigabytes.
3416 This variable indicates if the system supports dynamic
3417 loading of some sort. See also dlsrc and dlobj.
3419 useithreads (usethreads.U):
3420 This variable conditionally defines the USE_ITHREADS symbol,
3421 and indicates that Perl should be built to use the interpreter-based
3422 threading implementation.
3424 uselargefiles (uselfs.U):
3425 This variable conditionally defines the USE_LARGE_FILES symbol,
3426 and indicates that large file interfaces should be used when
3429 uselongdouble (uselongdbl.U):
3430 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3431 and indicates that long doubles should be used when available.
3433 usemorebits (usemorebits.U):
3434 This variable conditionally defines the USE_MORE_BITS symbol,
3435 and indicates that explicit 64-bit interfaces and long doubles
3436 should be used when available.
3438 usemultiplicity (usemultiplicity.U):
3439 This variable conditionally defines the MULTIPLICITY symbol,
3440 and indicates that Perl should be built to use multiplicity.
3442 usemymalloc (mallocsrc.U):
3443 This variable contains y if the malloc that comes with this package
3444 is desired over the system's version of malloc. People often include
3445 special versions of malloc for effiency, but such versions are often
3446 less portable. See also mallocsrc and mallocobj.
3447 If this is 'y', then -lmalloc is removed from $libs.
3450 This variable contains 'true' or 'false' depending whether the
3451 nm extraction is wanted or not.
3453 useopcode (Extensions.U):
3454 This variable holds either 'true' or 'false' to indicate
3455 whether the Opcode extension should be used. The sole
3456 use for this currently is to allow an easy mechanism
3457 for users to skip the Opcode extension from the Configure
3460 useperlio (useperlio.U):
3461 This variable conditionally defines the USE_PERLIO symbol,
3462 and indicates that the PerlIO abstraction should be
3465 useposix (Extensions.U):
3466 This variable holds either 'true' or 'false' to indicate
3467 whether the POSIX extension should be used. The sole
3468 use for this currently is to allow an easy mechanism
3469 for hints files to indicate that POSIX will not compile
3470 on a particular system.
3473 This variable is set to true when the user agrees to use sfio.
3474 It is set to false when sfio is not available or when the user
3475 explicitely requests not to use sfio. It is here primarily so
3476 that command-line settings can override the auto-detection of
3477 d_sfio without running into a "WHOA THERE".
3479 useshrplib (libperl.U):
3480 This variable is set to 'yes' if the user wishes
3481 to build a shared libperl, and 'no' otherwise.
3483 usesocks (usesocks.U):
3484 This variable conditionally defines the USE_SOCKS symbol,
3485 and indicates that Perl should be built to use SOCKS.
3487 usethreads (usethreads.U):
3488 This variable conditionally defines the USE_THREADS symbol,
3489 and indicates that Perl should be built to use threads.
3491 usevendorprefix (vendorprefix.U):
3492 This variable tells whether the vendorprefix
3493 and consequently other vendor* paths are in use.
3495 usevfork (d_vfork.U):
3496 This variable is set to true when the user accepts to use vfork.
3497 It is set to false when no vfork is available or when the user
3498 explicitely requests not to use vfork.
3501 This variable holds the path of the include files, which is
3502 usually /usr/include. It is mainly used by other Configure units.
3505 This variable is defined but not used by Configure.
3506 The value is a plain '' and is not useful.
3508 uvoformat (perlxvf.U):
3509 This variable contains the format string used for printing
3510 a Perl UV as an unsigned octal integer.
3513 This variable is the size of a UV in bytes.
3516 This variable contains the C type used for Perl's UV.
3518 uvuformat (perlxvf.U):
3519 This variable contains the format string used for printing
3520 a Perl UV as an unsigned decimal integer.
3522 uvxformat (perlxvf.U):
3523 This variable contains the format string used for printing
3524 a Perl UV as an unsigned hexadecimal integer.
3526 vendorarch (vendorarch.U):
3527 This variable contains the value of the PERL_VENDORARCH symbol.
3528 It may have a ~ on the front.
3529 The standard distribution will put nothing in this directory.
3530 Vendors who distribute perl may wish to place their own
3531 architecture-dependent modules and extensions in this directory with
3532 MakeMaker Makefile.PL INSTALLDIRS=vendor
3533 or equivalent. See INSTALL for details.
3535 vendorarchexp (vendorarch.U):
3536 This variable is the ~name expanded version of vendorarch, so that you
3537 may use it directly in Makefiles or shell scripts.
3539 vendorbin (vendorbin.U):
3540 This variable contains the eventual value of the VENDORBIN symbol.
3541 It may have a ~ on the front.
3542 The standard distribution will put nothing in this directory.
3543 Vendors who distribute perl may wish to place additional
3544 binaries in this directory with
3545 MakeMaker Makefile.PL INSTALLDIRS=vendor
3546 or equivalent. See INSTALL for details.
3548 vendorbinexp (vendorbin.U):
3549 This variable is the ~name expanded version of vendorbin, so that you
3550 may use it directly in Makefiles or shell scripts.
3552 vendorlib (vendorlib.U):
3553 This variable contains the eventual value of the VENDORLIB symbol,
3554 which is the name of the private library for this package.
3555 The standard distribution will put nothing in this directory.
3556 Vendors who distribute perl may wish to place their own
3557 modules in this directory with
3558 MakeMaker Makefile.PL INSTALLDIRS=vendor
3559 or equivalent. See INSTALL for details.
3561 vendorlib_stem (vendorlib.U):
3562 This variable is $vendorlibexp with any trailing version-specific component
3563 removed. The elements in inc_version_list (inc_version_list.U) can
3564 be tacked onto this variable to generate a list of directories to search.
3566 vendorlibexp (vendorlib.U):
3567 This variable is the ~name expanded version of vendorlib, so that you
3568 may use it directly in Makefiles or shell scripts.
3570 vendorprefix (vendorprefix.U):
3571 This variable holds the full absolute path of the directory below
3572 which the vendor will install add-on packages.
3573 See INSTALL for usage and examples.
3575 vendorprefixexp (vendorprefix.U):
3576 This variable holds the full absolute path of the directory below
3577 which the vendor will install add-on packages. Derived from vendorprefix.
3579 version (patchlevel.U):
3580 The full version number of this package, such as 5.6.1 (or 5_6_1).
3581 This combines revision, patchlevel, and subversion to get the
3582 full version number, including any possible subversions.
3583 This is suitable for use as a directory name, and hence is
3584 filesystem dependent.
3587 This variable is defined but not used by Configure.
3588 The value is a plain '' and is not useful.
3590 voidflags (voidflags.U):
3591 This variable contains the eventual value of the VOIDFLAGS symbol,
3592 which indicates how much support of the void type is given by this
3593 compiler. See VOIDFLAGS for more info.
3596 This variable holds extra path (space-separated) used to find
3597 libraries on this platform, for example CPU-specific libraries
3598 (on multi-CPU platforms) may be listed here.
3600 xs_apiversion (xs_apiversion.U):
3601 This variable contains the version of the oldest perl binary
3602 compatible with the present perl. perl.c:incpush() and
3603 lib/lib.pm will automatically search in $sitearch for older
3604 directories across major versions back to xs_apiversion.
3605 This is only useful if you have a perl library directory tree
3606 structured like the default one.
3607 See INSTALL for how this works.
3608 The versioned site_perl directory was introduced in 5.005,
3609 so that is the lowest possible value.
3610 Since this can depend on compile time options (such as
3611 bincompat) it is set by Configure. Other non-default sources
3612 of potential incompatibility, such as multiplicity, threads,
3613 debugging, 64bits, sfio, etc., are not checked for currently,
3614 though in principle we could go snooping around in old
3618 This variable is defined but not used by Configure.
3619 The value is a plain '' and is not useful.
3622 This variable is used internally by Configure to determine the
3623 full pathname (if any) of the zip program. After Configure runs,
3624 the value is reset to a plain "zip" and is not useful.