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. Usual values are 2, 4 and 8.
31 ansi2knr (ansi2knr.U):
32 This variable is set if the user needs to run ansi2knr.
33 Currently, this is not supported, so we just abort.
35 aphostname (d_gethname.U):
36 This variable contains the command which can be used to compute the
37 host name. The command is fully qualified by its absolute path, to make
38 it safe when used by a process with super-user privileges.
40 api_revision (patchlevel.U):
41 The three variables, api_revision, api_version, and
42 api_subversion, specify the version of the oldest perl binary
43 compatible with the present perl. In a full version string
44 such as '5.6.1', api_revision is the '5'.
45 Prior to 5.5.640, the format was a floating point number,
47 perl.c:incpush() and lib/lib.pm will automatically search in
48 $sitelib/.. for older directories back to the limit specified
49 by these api_ variables. This is only useful if you have a
50 perl library directory tree structured like the default one.
51 See INSTALL for how this works. The versioned site_perl
52 directory was introduced in 5.005, so that is the lowest
53 possible value. The version list appropriate for the current
54 system is determined in inc_version_list.U.
55 XXX To do: Since compatibility can depend on compile time
56 options (such as bincompat, longlong, etc.) it should
57 (perhaps) be set by Configure, but currently it isn't.
58 Currently, we read a hard-wired value from patchlevel.h.
59 Perhaps what we ought to do is take the hard-wired value from
60 patchlevel.h but then modify it if the current Configure
61 options warrant. patchlevel.h then would use an #ifdef guard.
63 api_subversion (patchlevel.U):
64 The three variables, api_revision, api_version, and
65 api_subversion, specify the version of the oldest perl binary
66 compatible with the present perl. In a full version string
67 such as '5.6.1', api_subversion is the '1'. See api_revision for
70 api_version (patchlevel.U):
71 The three variables, api_revision, api_version, and
72 api_subversion, specify the version of the oldest perl binary
73 compatible with the present perl. In a full version string
74 such as '5.6.1', api_version is the '6'. See api_revision for
75 full details. As a special case, 5.5.0 is rendered in the
76 old-style as 5.005. (In the 5.005_0x maintenance series,
77 this was the only versioned directory in $sitelib.)
79 api_versionstring (patchlevel.U):
80 This variable combines api_revision, api_version, and
81 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
82 for use as a directory name. This is filesystem dependent.
85 This variable is used internally by Configure to determine the
86 full pathname (if any) of the ar program. After Configure runs,
87 the value is reset to a plain "ar" and is not useful.
90 This variable holds the name of the directory in which the user wants
91 to put architecture-dependent public library files for $package.
92 It is most often a local directory such as /usr/local/lib.
93 Programs using this variable must be prepared to deal
94 with filename expansion.
96 archlibexp (archlib.U):
97 This variable is the same as the archlib variable, but is
98 filename expanded at configuration time, for convenient use.
100 archname64 (use64bits.U):
101 This variable is used for the 64-bitness part of $archname.
103 archname (archname.U):
104 This variable is a short name to characterize the current
105 architecture. It is used mainly to construct the default archlib.
108 This variable defines any additional objects that must be linked
109 in with the program on this architecture. On unix, it is usually
110 empty. It is typically used to include emulations of unix calls
111 or other facilities. For perl on OS/2, for example, this would
115 This variable is used internally by Configure to determine the
116 full pathname (if any) of the awk program. After Configure runs,
117 the value is reset to a plain "awk" and is not useful.
120 The base revision level of this package, from the .package file.
123 This variable is defined but not used by Configure.
124 The value is a plain '' and is not useful.
127 This variable holds the name of the directory in which the user wants
128 to put publicly executable images for the package in question. It
129 is most often a local directory such as /usr/local/bin. Programs using
130 this variable must be prepared to deal with ~name substitution.
132 bincompat5005 (bincompat5005.U):
133 This variable contains y if Perl 5.006 should be binary-compatible
137 This is the same as the bin variable, but is filename expanded at
138 configuration time, for use in your makefiles.
141 This variable is defined but not used by Configure.
142 The value is a plain '' and is not useful.
145 This variable is used internally by Configure to determine the
146 full pathname (if any) of the byacc program. After Configure runs,
147 the value is reset to a plain "byacc" and is not useful.
149 byteorder (byteorder.U):
150 This variable holds the byte order. In the following, larger digits
151 indicate more significance. The variable byteorder is either 4321
152 on a big-endian machine, or 1234 on a little-endian, or 87654321
153 on a Cray ... or 3412 with weird order !
156 This variable contains the \c string if that is what causes the echo
157 command to suppress newline. Otherwise it is null. Correct usage is
158 $echo $n "prompt for a question: $c".
160 castflags (d_castneg.U):
161 This variable contains a flag that precise difficulties the
162 compiler has casting odd floating values to unsigned long:
164 1 = couldn't cast < 0
165 2 = couldn't cast >= 0x80000000
166 4 = couldn't cast in argument expression list
169 This variable is used internally by Configure to determine the
170 full pathname (if any) of the cat program. After Configure runs,
171 the value is reset to a plain "cat" and is not useful.
174 This variable holds the name of a command to execute a C compiler which
175 can resolve multiple global references that happen to have the same
176 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
178 cccdlflags (dlsrc.U):
179 This variable contains any special flags that might need to be
180 passed with 'cc -c' to compile modules to be used to create a shared
181 library that will be used for dynamic loading. For hpux, this
182 should be +z. It is up to the makefile to use it.
185 This variable contains any special flags that might need to be
186 passed to cc to link with a shared library for dynamic loading.
187 It is up to the makefile to use it. For sunos 4.1, it should
191 This variable contains any additional C compiler flags desired by
192 the user. It is up to the Makefile to use this.
194 ccsymbols (Cppsym.U):
195 The variable contains the symbols defined by the C compiler alone.
196 The list is a space-separated list of symbol=value tokens.
199 Login name of the person who ran the Configure script and answered the
200 questions. This is used to tag both config.sh and config_h.SH.
202 cf_email (cf_email.U):
203 Electronic mail address of the person who ran Configure. This can be
204 used by units that require the user's e-mail, like MailList.U.
207 Holds the output of the "date" command when the configuration file was
208 produced. This is used to tag both config.sh and config_h.SH.
210 charsize (charsize.U):
211 This variable contains the value of the CHARSIZE symbol, which
212 indicates to the C program how many bytes there are in a character.
215 This variable is defined but not used by Configure.
216 The value is a plain '' and is not useful.
219 This variable is defined but not used by Configure.
220 The value is a plain '' and is not useful.
223 This variable is defined but not used by Configure.
224 The value is a plain '' and is not useful.
226 clocktype (d_times.U):
227 This variable holds the type returned by times(). It can be long,
228 or clock_t on BSD sites (in which case <sys/types.h> should be
232 This variable is used internally by Configure to determine the
233 full pathname (if any) of the comm program. After Configure runs,
234 the value is reset to a plain "comm" and is not useful.
237 This variable is defined but not used by Configure.
238 The value is a plain '' and is not useful.
240 CONFIGDOTSH (Oldsyms.U):
241 This is set to 'true' in config.sh so that a shell script
242 sourcing config.sh can tell if it has been sourced already.
244 contains (contains.U):
245 This variable holds the command to do a grep with a proper return
246 status. On most sane systems it is simply "grep". On insane systems
247 it is a grep followed by a cat followed by a test. This variable
248 is primarily for the use of other Configure units.
251 This variable is used internally by Configure to determine the
252 full pathname (if any) of the cp program. After Configure runs,
253 the value is reset to a plain "cp" and is not useful.
256 This variable is defined but not used by Configure.
257 The value is a plain '' and is not useful.
260 This variable is used internally by Configure to determine the
261 full pathname (if any) of the cpp program. After Configure runs,
262 the value is reset to a plain "cpp" and is not useful.
264 cpp_stuff (cpp_stuff.U):
265 This variable contains an identification of the catenation mechanism
266 used by the C preprocessor.
268 cppccsymbols (Cppsym.U):
269 The variable contains the symbols defined by both
270 the bare C compiler and during a compilation that
272 The list is a space-separated list of symbol=value tokens.
274 cppflags (ccflags.U):
275 This variable holds the flags that will be passed to the C pre-
276 processor. It is up to the Makefile to use it.
278 cpplast (cppstdin.U):
279 This variable has the same functionality as cppminus, only it applies
280 to cpprun and not cppstdin.
282 cppminus (cppstdin.U):
283 This variable contains the second part of the string which will invoke
284 the C preprocessor on the standard input and produce to standard
285 output. This variable will have the value "-" if cppstdin needs
286 a minus to specify standard input, otherwise the value is "".
289 This variable contains the command which will invoke a C preprocessor
290 on standard input and put the output to stdout. It is guaranteed not
291 to be a wrapper and may be a null string if no preprocessor can be
292 made directly available. This preprocessor might be different from the
293 one used by the C compiler. Don't forget to append cpplast after the
294 preprocessor options.
296 cppstdin (cppstdin.U):
297 This variable contains the command which will invoke the C
298 preprocessor on standard input and put the output to stdout.
299 It is primarily used by other Configure units that ask about
300 preprocessor symbols.
302 cppsymbols (Cppsym.U):
303 The variable contains the symbols during a compilation
304 that includes stdio.h.
305 The list is a space-separated list of symbol=value tokens.
307 crosscompile (crosscompile.U):
308 This variable conditionally defines the CROSSCOMPILE symbol
309 which signifies that the build process is be a cross-compilation.
310 This is normally set by hints files or from Configure command line.
312 cryptlib (d_crypt.U):
313 This variable holds -lcrypt or the path to a libcrypt.a archive if
314 the crypt() function is not defined in the standard C library. It is
315 up to the Makefile to use this.
318 This variable is used internally by Configure to determine the
319 full pathname (if any) of the csh program. After Configure runs,
320 the value is reset to a plain "csh" and is not useful.
322 d_access (d_access.U):
323 This variable conditionally defines HAS_ACCESS if the access() system
324 call is available to check for access permissions using real IDs.
326 d_accessx (d_accessx.U):
327 This variable conditionally defines the HAS_ACCESSX symbol, which
328 indicates to the C program that the accessx() routine is available.
331 This variable conditionally defines the HAS_ALARM symbol, which
332 indicates to the C program that the alarm() routine is available.
334 d_archlib (archlib.U):
335 This variable conditionally defines ARCHLIB to hold the pathname
336 of architecture-dependent library files for $package. If
337 $archlib is the same as $privlib, then this is set to undef.
340 This variable conditionally defines the HAS_ATOLF symbol, which
341 indicates to the C program that the atolf() routine is available.
344 This variable conditionally defines the HAS_ATOLL symbol, which
345 indicates to the C program that the atoll() routine is available.
347 d_attribut (d_attribut.U):
348 This variable conditionally defines HASATTRIBUTE, which
349 indicates the C compiler can check for function attributes,
350 such as printf formats.
353 This variable conditionally defines the HAS_BCMP symbol if
354 the bcmp() routine is available to compare strings.
357 This variable conditionally defines the HAS_BCOPY symbol if
358 the bcopy() routine is available to copy strings.
360 d_bincompat5005 (bincompat5005.U):
361 This variable conditionally defines BINCOMPAT5005 so that embed.h
362 can take special action if Perl 5.006 should be binary-compatible
363 with Perl 5.005. This is impossible for builds that use features
364 like threads and multiplicity it is always $undef for those versions.
367 This symbol conditionally defines the symbol BSD when running on a
370 d_bsdgetpgrp (d_getpgrp.U):
371 This variable conditionally defines USE_BSD_GETPGRP if
372 getpgrp needs one arguments whereas USG one needs none.
374 d_bsdsetpgrp (d_setpgrp.U):
375 This variable conditionally defines USE_BSD_SETPGRP if
376 setpgrp needs two arguments whereas USG one needs none.
377 See also d_setpgid for a POSIX interface.
380 This variable conditionally defines the HAS_BZERO symbol if
381 the bzero() routine is available to set memory to 0.
383 d_casti32 (d_casti32.U):
384 This variable conditionally defines CASTI32, which indicates
385 whether the C compiler can cast large floats to 32-bit ints.
387 d_castneg (d_castneg.U):
388 This variable conditionally defines CASTNEG, which indicates
389 wether the C compiler can cast negative float to unsigned.
391 d_charvspr (d_vprintf.U):
392 This variable conditionally defines CHARVSPRINTF if this system
393 has vsprintf returning type (char*). The trend seems to be to
394 declare it as "int vsprintf()".
397 This variable conditionally defines the HAS_CHOWN symbol, which
398 indicates to the C program that the chown() routine is available.
400 d_chroot (d_chroot.U):
401 This variable conditionally defines the HAS_CHROOT symbol, which
402 indicates to the C program that the chroot() routine is available.
404 d_chsize (d_chsize.U):
405 This variable conditionally defines the CHSIZE symbol, which
406 indicates to the C program that the chsize() routine is available
407 to truncate files. You might need a -lx to get this routine.
409 d_closedir (d_closedir.U):
410 This variable conditionally defines HAS_CLOSEDIR if closedir() is
414 This variable conditionally defines the HASCONST symbol, which
415 indicates to the C program that this C compiler knows about the
419 This variable conditionally defines the CRYPT symbol, which
420 indicates to the C program that the crypt() routine is available
421 to encrypt passwords and the like.
424 This variable conditionally defines the CSH symbol, which
425 indicates to the C program that the C-shell exists.
427 d_cuserid (d_cuserid.U):
428 This variable conditionally defines the HAS_CUSERID symbol, which
429 indicates to the C program that the cuserid() routine is available
430 to get character login names.
432 d_dbl_dig (d_dbl_dig.U):
433 This variable conditionally defines d_dbl_dig if this system's
434 header files provide DBL_DIG, which is the number of significant
435 digits in a double precision number.
437 d_difftime (d_difftime.U):
438 This variable conditionally defines the HAS_DIFFTIME symbol, which
439 indicates to the C program that the difftime() routine is available.
441 d_dirnamlen (i_dirent.U):
442 This variable conditionally defines DIRNAMLEN, which indicates
443 to the C program that the length of directory entry names is
444 provided by a d_namelen field.
446 d_dlerror (d_dlerror.U):
447 This variable conditionally defines the HAS_DLERROR symbol, which
448 indicates to the C program that the dlerror() routine is available.
450 d_dlopen (d_dlopen.U):
451 This variable conditionally defines the HAS_DLOPEN symbol, which
452 indicates to the C program that the dlopen() routine is available.
454 d_dlsymun (d_dlsymun.U):
455 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
456 indicates that we need to prepend an underscore to the symbol
457 name before calling dlsym().
459 d_dosuid (d_dosuid.U):
460 This variable conditionally defines the symbol DOSUID, which
461 tells the C program that it should insert setuid emulation code
462 on hosts which have setuid #! scripts disabled.
464 d_drand48proto (d_drand48proto.U):
465 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
466 which indicates to the C program that the system provides
467 a prototype for the drand48() function. Otherwise, it is
468 up to the program to supply one.
471 This variable conditionally defines HAS_DUP2 if dup2() is
472 available to duplicate file descriptors.
474 d_eaccess (d_eaccess.U):
475 This variable conditionally defines the HAS_EACCESS symbol, which
476 indicates to the C program that the eaccess() routine is available.
478 d_endgrent (d_endgrent.U):
479 This variable conditionally defines the HAS_ENDGRENT symbol, which
480 indicates to the C program that the endgrent() routine is available
481 for sequential access of the group database.
483 d_endhent (d_endhent.U):
484 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
485 available to close whatever was being used for host queries.
487 d_endnent (d_endnent.U):
488 This variable conditionally defines HAS_ENDNETENT if endnetent() is
489 available to close whatever was being used for network queries.
491 d_endpent (d_endpent.U):
492 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
493 available to close whatever was being used for protocol queries.
495 d_endpwent (d_endpwent.U):
496 This variable conditionally defines the HAS_ENDPWENT symbol, which
497 indicates to the C program that the endpwent() routine is available
498 for sequential access of the passwd database.
500 d_endsent (d_endsent.U):
501 This variable conditionally defines HAS_ENDSERVENT if endservent() is
502 available to close whatever was being used for service queries.
504 d_endspent (d_endspent.U):
505 This variable conditionally defines HAS_ENDSPENT if endspent() is
506 available to finalize the scan of SysV shadow password entries.
508 d_eofnblk (nblock_io.U):
509 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
510 when reading from a non-blocking I/O source.
513 This variable conditionally defines the symbols EUNICE and VAX, which
514 alerts the C program that it must deal with ideosyncracies of VMS.
516 d_fchmod (d_fchmod.U):
517 This variable conditionally defines the HAS_FCHMOD symbol, which
518 indicates to the C program that the fchmod() routine is available
519 to change mode of opened files.
521 d_fchown (d_fchown.U):
522 This variable conditionally defines the HAS_FCHOWN symbol, which
523 indicates to the C program that the fchown() routine is available
524 to change ownership of opened files.
527 This variable conditionally defines the HAS_FCNTL symbol, and indicates
528 whether the fcntl() function exists
530 d_fd_macros (d_fd_set.U):
531 This variable contains the eventual value of the HAS_FD_MACROS symbol,
532 which indicates if your C compiler knows about the macros which
533 manipulate an fd_set.
535 d_fd_set (d_fd_set.U):
536 This variable contains the eventual value of the HAS_FD_SET symbol,
537 which indicates if your C compiler knows about the fd_set typedef.
539 d_fds_bits (d_fd_set.U):
540 This variable contains the eventual value of the HAS_FDS_BITS symbol,
541 which indicates if your fd_set typedef contains the fds_bits member.
542 If you have an fd_set typedef, but the dweebs who installed it did
543 a half-fast job and neglected to provide the macros to manipulate
544 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
546 d_fgetpos (d_fgetpos.U):
547 This variable conditionally defines HAS_FGETPOS if fgetpos() is
548 available to get the file position indicator.
550 d_flexfnam (d_flexfnam.U):
551 This variable conditionally defines the FLEXFILENAMES symbol, which
552 indicates that the system supports filenames longer than 14 characters.
555 This variable conditionally defines HAS_FLOCK if flock() is
556 available to do file locking.
559 This variable conditionally defines the HAS_FORK symbol, which
560 indicates to the C program that the fork() routine is available.
562 d_fpathconf (d_pathconf.U):
563 This variable conditionally defines the HAS_FPATHCONF symbol, which
564 indicates to the C program that the pathconf() routine is available
565 to determine file-system related limits and options associated
566 with a given open file descriptor.
569 This symbol will be defined if the C compiler supports fpos64_t.
571 d_fs_data_s (d_fs_data_s.U):
572 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
573 which indicates that the struct fs_data is supported.
575 d_fseeko (d_fseeko.U):
576 This variable conditionally defines the HAS_FSEEKO symbol, which
577 indicates to the C program that the fseeko() routine is available.
579 d_fsetpos (d_fsetpos.U):
580 This variable conditionally defines HAS_FSETPOS if fsetpos() is
581 available to set the file position indicator.
583 d_fstatfs (d_fstatfs.U):
584 This variable conditionally defines the HAS_FSTATFS symbol, which
585 indicates to the C program that the fstatfs() routine is available.
587 d_fstatvfs (d_statvfs.U):
588 This variable conditionally defines the HAS_FSTATVFS symbol, which
589 indicates to the C program that the fstatvfs() routine is available.
591 d_ftello (d_ftello.U):
592 This variable conditionally defines the HAS_FTELLO symbol, which
593 indicates to the C program that the ftello() routine is available.
596 This variable conditionally defines the HAS_FTIME symbol, which indicates
597 that the ftime() routine exists. The ftime() routine is basically
598 a sub-second accuracy clock.
600 d_Gconvert (d_gconvert.U):
601 This variable holds what Gconvert is defined as to convert
602 floating point numbers into strings. It could be 'gconvert'
603 or a more complex macro emulating gconvert with gcvt() or sprintf.
605 d_Gconvert='gconvert((x),(n),(t),(b))'
606 d_Gconvert='gcvt((x),(n),(b))'
607 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
609 d_getgrent (d_getgrent.U):
610 This variable conditionally defines the HAS_GETGRENT symbol, which
611 indicates to the C program that the getgrent() routine is available
612 for sequential access of the group database.
614 d_getgrps (d_getgrps.U):
615 This variable conditionally defines the HAS_GETGROUPS symbol, which
616 indicates to the C program that the getgroups() routine is available
617 to get the list of process groups.
619 d_gethbyaddr (d_gethbyad.U):
620 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
621 indicates to the C program that the gethostbyaddr() routine is available
622 to look up hosts by their IP addresses.
624 d_gethbyname (d_gethbynm.U):
625 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
626 indicates to the C program that the gethostbyname() routine is available
627 to look up host names in some data base or other.
629 d_gethent (d_gethent.U):
630 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
631 available to look up host names in some data base or another.
633 d_gethname (d_gethname.U):
634 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
635 indicates to the C program that the gethostname() routine may be
636 used to derive the host name.
638 d_gethostprotos (d_gethostprotos.U):
639 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
640 which indicates to the C program that <netdb.h> supplies
641 prototypes for the various gethost*() functions.
642 See also netdbtype.U for probing for various netdb types.
644 d_getlogin (d_getlogin.U):
645 This variable conditionally defines the HAS_GETLOGIN symbol, which
646 indicates to the C program that the getlogin() routine is available
647 to get the login name.
649 d_getmnt (d_getmnt.U):
650 This variable conditionally defines the HAS_GETMNT symbol, which
651 indicates to the C program that the getmnt() routine is available
652 to retrieve one or more mount info blocks by filename.
654 d_getmntent (d_getmntent.U):
655 This variable conditionally defines the HAS_GETMNTENT symbol, which
656 indicates to the C program that the getmntent() routine is available
657 to iterate through mounted files to get their mount info.
659 d_getnbyaddr (d_getnbyad.U):
660 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
661 indicates to the C program that the getnetbyaddr() routine is available
662 to look up networks by their IP addresses.
664 d_getnbyname (d_getnbynm.U):
665 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
666 indicates to the C program that the getnetbyname() routine is available
667 to look up networks by their names.
669 d_getnent (d_getnent.U):
670 This variable conditionally defines HAS_GETNETENT if getnetent() is
671 available to look up network names in some data base or another.
673 d_getnetprotos (d_getnetprotos.U):
674 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
675 which indicates to the C program that <netdb.h> supplies
676 prototypes for the various getnet*() functions.
677 See also netdbtype.U for probing for various netdb types.
679 d_getpbyname (d_getprotby.U):
680 This variable conditionally defines the HAS_GETPROTOBYNAME
681 symbol, which indicates to the C program that the
682 getprotobyname() routine is available to look up protocols
685 d_getpbynumber (d_getprotby.U):
686 This variable conditionally defines the HAS_GETPROTOBYNUMBER
687 symbol, which indicates to the C program that the
688 getprotobynumber() routine is available to look up protocols
691 d_getpent (d_getpent.U):
692 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
693 available to look up protocols in some data base or another.
695 d_getpgid (d_getpgid.U):
696 This variable conditionally defines the HAS_GETPGID symbol, which
697 indicates to the C program that the getpgid(pid) function
698 is available to get the process group id.
700 d_getpgrp2 (d_getpgrp2.U):
701 This variable conditionally defines the HAS_GETPGRP2 symbol, which
702 indicates to the C program that the getpgrp2() (as in DG/UX) routine
703 is available to get the current process group.
705 d_getpgrp (d_getpgrp.U):
706 This variable conditionally defines HAS_GETPGRP if getpgrp() is
707 available to get the current process group.
709 d_getppid (d_getppid.U):
710 This variable conditionally defines the HAS_GETPPID symbol, which
711 indicates to the C program that the getppid() routine is available
712 to get the parent process ID.
714 d_getprior (d_getprior.U):
715 This variable conditionally defines HAS_GETPRIORITY if getpriority()
716 is available to get a process's priority.
718 d_getprotoprotos (d_getprotoprotos.U):
719 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
720 which indicates to the C program that <netdb.h> supplies
721 prototypes for the various getproto*() functions.
722 See also netdbtype.U for probing for various netdb types.
724 d_getpwent (d_getpwent.U):
725 This variable conditionally defines the HAS_GETPWENT symbol, which
726 indicates to the C program that the getpwent() routine is available
727 for sequential access of the passwd database.
729 d_getsbyname (d_getsrvby.U):
730 This variable conditionally defines the HAS_GETSERVBYNAME
731 symbol, which indicates to the C program that the
732 getservbyname() routine is available to look up services
735 d_getsbyport (d_getsrvby.U):
736 This variable conditionally defines the HAS_GETSERVBYPORT
737 symbol, which indicates to the C program that the
738 getservbyport() routine is available to look up services
741 d_getsent (d_getsent.U):
742 This variable conditionally defines HAS_GETSERVENT if getservent() is
743 available to look up network services in some data base or another.
745 d_getservprotos (d_getservprotos.U):
746 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
747 which indicates to the C program that <netdb.h> supplies
748 prototypes for the various getserv*() functions.
749 See also netdbtype.U for probing for various netdb types.
751 d_getspent (d_getspent.U):
752 This variable conditionally defines HAS_GETSPENT if getspent() is
753 available to retrieve SysV shadow password entries sequentially.
755 d_getspnam (d_getspnam.U):
756 This variable conditionally defines HAS_GETSPNAM if getspnam() is
757 available to retrieve SysV shadow password entries by name.
759 d_gettimeod (d_ftime.U):
760 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
761 indicates that the gettimeofday() system call exists (to obtain a
762 sub-second accuracy clock). You should probably include <sys/resource.h>.
764 d_gnulibc (d_gnulibc.U):
765 Defined if we're dealing with the GNU C Library.
767 d_grpasswd (i_grp.U):
768 This variable conditionally defines GRPASSWD, which indicates
769 that struct group in <grp.h> contains gr_passwd.
771 d_hasmntopt (d_hasmntopt.U):
772 This variable conditionally defines the HAS_HASMNTOPT symbol, which
773 indicates to the C program that the hasmntopt() routine is available
774 to query the mount options of file systems.
777 This variable conditionally defines HAS_HTONL if htonl() and its
778 friends are available to do network order byte swapping.
781 This variable conditionally defines the HAS_ICONV symbol, which
782 indicates to the C program that the iconv() routine is available.
784 d_index (d_strchr.U):
785 This variable conditionally defines HAS_INDEX if index() and
786 rindex() are available for string searching.
788 d_inetaton (d_inetaton.U):
789 This variable conditionally defines the HAS_INET_ATON symbol, which
790 indicates to the C program that the inet_aton() function is available
791 to parse IP address "dotted-quad" strings.
793 d_int64t (d_int64t.U):
794 This symbol will be defined if the C compiler supports int64_t.
796 d_isascii (d_isascii.U):
797 This variable conditionally defines the HAS_ISASCII constant,
798 which indicates to the C program that isascii() is available.
800 d_killpg (d_killpg.U):
801 This variable conditionally defines the HAS_KILLPG symbol, which
802 indicates to the C program that the killpg() routine is available
803 to kill process groups.
805 d_lchown (d_lchown.U):
806 This variable conditionally defines the HAS_LCHOWN symbol, which
807 indicates to the C program that the lchown() routine is available
808 to operate on a symbolic link (instead of following the link).
810 d_ldbl_dig (d_ldbl_dig.U):
811 This variable conditionally defines d_ldbl_dig if this system's
812 header files provide LDBL_DIG, which is the number of significant
813 digits in a long double precision number.
816 This variable conditionally defines HAS_LINK if link() is
817 available to create hard links.
819 d_locconv (d_locconv.U):
820 This variable conditionally defines HAS_LOCALECONV if localeconv() is
821 available for numeric and monetary formatting conventions.
824 This variable conditionally defines HAS_LOCKF if lockf() is
825 available to do file locking.
827 d_longdbl (d_longdbl.U):
828 This variable conditionally defines HAS_LONG_DOUBLE if
829 the long double type is supported.
831 d_longlong (d_longlong.U):
832 This variable conditionally defines HAS_LONG_LONG if
833 the long long type is supported.
836 This variable conditionally defines HAS_LSTAT if lstat() is
837 available to do file stats on symbolic links.
840 This variable conditionally defines the HAS_MBLEN symbol, which
841 indicates to the C program that the mblen() routine is available
842 to find the number of bytes in a multibye character.
844 d_mbstowcs (d_mbstowcs.U):
845 This variable conditionally defines the HAS_MBSTOWCS symbol, which
846 indicates to the C program that the mbstowcs() routine is available
847 to convert a multibyte string into a wide character string.
849 d_mbtowc (d_mbtowc.U):
850 This variable conditionally defines the HAS_MBTOWC symbol, which
851 indicates to the C program that the mbtowc() routine is available
852 to convert multibyte to a wide character.
854 d_memchr (d_memchr.U):
855 This variable conditionally defines the HAS_MEMCHR symbol, which
856 indicates to the C program that the memchr() routine is available
857 to locate characters within a C string.
859 d_memcmp (d_memcmp.U):
860 This variable conditionally defines the HAS_MEMCMP symbol, which
861 indicates to the C program that the memcmp() routine is available
862 to compare blocks of memory.
864 d_memcpy (d_memcpy.U):
865 This variable conditionally defines the HAS_MEMCPY symbol, which
866 indicates to the C program that the memcpy() routine is available
867 to copy blocks of memory.
869 d_memmove (d_memmove.U):
870 This variable conditionally defines the HAS_MEMMOVE symbol, which
871 indicates to the C program that the memmove() routine is available
872 to copy potentatially overlapping blocks of memory.
874 d_memset (d_memset.U):
875 This variable conditionally defines the HAS_MEMSET symbol, which
876 indicates to the C program that the memset() routine is available
877 to set blocks of memory.
880 This variable conditionally defines the HAS_MKDIR symbol, which
881 indicates to the C program that the mkdir() routine is available
882 to create directories..
884 d_mkdtemp (d_mkdtemp.U):
885 This variable conditionally defines the HAS_MKDTEMP symbol, which
886 indicates to the C program that the mkdtemp() routine is available
887 to exclusively create a uniquely named temporary directory.
889 d_mkfifo (d_mkfifo.U):
890 This variable conditionally defines the HAS_MKFIFO symbol, which
891 indicates to the C program that the mkfifo() routine is available.
893 d_mkstemp (d_mkstemp.U):
894 This variable conditionally defines the HAS_MKSTEMP symbol, which
895 indicates to the C program that the mkstemp() routine is available
896 to exclusively create and open a uniquely named temporary file.
898 d_mkstemps (d_mkstemps.U):
899 This variable conditionally defines the HAS_MKSTEMPS symbol, which
900 indicates to the C program that the mkstemps() routine is available
901 to exclusively create and open a uniquely named (with a suffix)
904 d_mktime (d_mktime.U):
905 This variable conditionally defines the HAS_MKTIME symbol, which
906 indicates to the C program that the mktime() routine is available.
909 This variable conditionally defines HAS_MMAP if mmap() is
910 available to map a file into memory.
912 d_mprotect (d_mprotect.U):
913 This variable conditionally defines HAS_MPROTECT if mprotect() is
914 available to modify the access protection of a memory mapped file.
917 This variable conditionally defines the HAS_MSG symbol, which
918 indicates that the entire msg*(2) library is present.
920 d_msg_ctrunc (d_socket.U):
921 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
922 which indicates that the MSG_CTRUNC is available. #ifdef is
923 not enough because it may be an enum, glibc has been known to do this.
925 d_msg_dontroute (d_socket.U):
926 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
927 which indicates that the MSG_DONTROUTE is available. #ifdef is
928 not enough because it may be an enum, glibc has been known to do this.
930 d_msg_oob (d_socket.U):
931 This variable conditionally defines the HAS_MSG_OOB symbol,
932 which indicates that the MSG_OOB is available. #ifdef is
933 not enough because it may be an enum, glibc has been known to do this.
935 d_msg_peek (d_socket.U):
936 This variable conditionally defines the HAS_MSG_PEEK symbol,
937 which indicates that the MSG_PEEK is available. #ifdef is
938 not enough because it may be an enum, glibc has been known to do this.
940 d_msg_proxy (d_socket.U):
941 This variable conditionally defines the HAS_MSG_PROXY symbol,
942 which indicates that the MSG_PROXY is available. #ifdef is
943 not enough because it may be an enum, glibc has been known to do this.
945 d_msgctl (d_msgctl.U):
946 This variable conditionally defines the HAS_MSGCTL symbol, which
947 indicates to the C program that the msgctl() routine is available.
949 d_msgget (d_msgget.U):
950 This variable conditionally defines the HAS_MSGGET symbol, which
951 indicates to the C program that the msgget() routine is available.
953 d_msgrcv (d_msgrcv.U):
954 This variable conditionally defines the HAS_MSGRCV symbol, which
955 indicates to the C program that the msgrcv() routine is available.
957 d_msgsnd (d_msgsnd.U):
958 This variable conditionally defines the HAS_MSGSND symbol, which
959 indicates to the C program that the msgsnd() routine is available.
962 This variable conditionally defines HAS_MSYNC if msync() is
963 available to synchronize a mapped file.
965 d_munmap (d_munmap.U):
966 This variable conditionally defines HAS_MUNMAP if munmap() is
967 available to unmap a region mapped by mmap().
969 d_mymalloc (mallocsrc.U):
970 This variable conditionally defines MYMALLOC in case other parts
971 of the source want to take special action if MYMALLOC is used.
972 This may include different sorts of profiling or error detection.
975 This variable conditionally defines the HAS_NICE symbol, which
976 indicates to the C program that the nice() routine is available.
978 d_nv_preserves_uv (perlxv.U):
979 This variable indicates whether a variable of type nvtype
980 can preserve all the bits a variable of type uvtype.
983 This symbol will be defined if the C compiler supports off64_t.
985 d_old_pthread_create_joinable (d_pthrattrj.U):
986 This variable conditionally defines pthread_create_joinable.
987 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
989 d_oldpthreads (usethreads.U):
990 This variable conditionally defines the OLD_PTHREADS_API symbol,
991 and indicates that Perl should be built to use the old
992 draft POSIX threads API. This is only potentially meaningful if
995 d_oldsock (d_socket.U):
996 This variable conditionally defines the OLDSOCKET symbol, which
997 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1000 This variable conditionally defines the HAS_OPEN3 manifest constant,
1001 which indicates to the C program that the 3 argument version of
1002 the open(2) function is available.
1004 d_pathconf (d_pathconf.U):
1005 This variable conditionally defines the HAS_PATHCONF symbol, which
1006 indicates to the C program that the pathconf() routine is available
1007 to determine file-system related limits and options associated
1008 with a given filename.
1010 d_pause (d_pause.U):
1011 This variable conditionally defines the HAS_PAUSE symbol, which
1012 indicates to the C program that the pause() routine is available
1013 to suspend a process until a signal is received.
1015 d_phostname (d_gethname.U):
1016 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1017 contains the shell command which, when fed to popen(), may be
1018 used to derive the host name.
1021 This variable conditionally defines the HAS_PIPE symbol, which
1022 indicates to the C program that the pipe() routine is available
1023 to create an inter-process channel.
1026 This variable conditionally defines the HAS_POLL symbol, which
1027 indicates to the C program that the poll() routine is available
1028 to poll active file descriptors.
1030 d_portable (d_portable.U):
1031 This variable conditionally defines the PORTABLE symbol, which
1032 indicates to the C program that it should not assume that it is
1033 running on the machine it was compiled on.
1035 d_PRId64 (quadfio.U):
1036 This variable conditionally defines the PERL_PRId64 symbol, which
1037 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1039 d_PRIeldbl (longdblfio.U):
1040 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1041 indiciates that stdio has a symbol to print long doubles.
1043 d_PRIEldbl (longdblfio.U):
1044 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1045 indiciates that stdio has a symbol to print long doubles.
1047 d_PRIfldbl (longdblfio.U):
1048 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1049 indiciates that stdio has a symbol to print long doubles.
1051 d_PRIFldbl (longdblfio.U):
1052 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1053 indiciates that stdio has a symbol to print long doubles.
1055 d_PRIgldbl (longdblfio.U):
1056 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1057 indiciates that stdio has a symbol to print long doubles.
1059 d_PRIGldbl (longdblfio.U):
1060 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1061 indiciates that stdio has a symbol to print long doubles.
1063 d_PRIi64 (quadfio.U):
1064 This variable conditionally defines the PERL_PRIi64 symbol, which
1065 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1067 d_PRIo64 (quadfio.U):
1068 This variable conditionally defines the PERL_PRIo64 symbol, which
1069 indiciates that stdio has a symbol to print 64-bit octal numbers.
1071 d_PRIu64 (quadfio.U):
1072 This variable conditionally defines the PERL_PRIu64 symbol, which
1073 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1076 d_PRIx64 (quadfio.U):
1077 This variable conditionally defines the PERL_PRIx64 symbol, which
1078 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1080 d_PRIX64 (quadfio.U):
1081 This variable conditionally defines the PERL_PRIX64 symbol, which
1082 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1084 d_pthread_yield (d_pthread_y.U):
1085 This variable conditionally defines the HAS_PTHREAD_YIELD
1086 symbol if the pthread_yield routine is available to yield
1087 the execution of the current thread.
1090 This variable conditionally defines PWAGE, which indicates
1091 that struct passwd contains pw_age.
1093 d_pwchange (i_pwd.U):
1094 This variable conditionally defines PWCHANGE, which indicates
1095 that struct passwd contains pw_change.
1097 d_pwclass (i_pwd.U):
1098 This variable conditionally defines PWCLASS, which indicates
1099 that struct passwd contains pw_class.
1101 d_pwcomment (i_pwd.U):
1102 This variable conditionally defines PWCOMMENT, which indicates
1103 that struct passwd contains pw_comment.
1105 d_pwexpire (i_pwd.U):
1106 This variable conditionally defines PWEXPIRE, which indicates
1107 that struct passwd contains pw_expire.
1109 d_pwgecos (i_pwd.U):
1110 This variable conditionally defines PWGECOS, which indicates
1111 that struct passwd contains pw_gecos.
1113 d_pwpasswd (i_pwd.U):
1114 This variable conditionally defines PWPASSWD, which indicates
1115 that struct passwd contains pw_passwd.
1117 d_pwquota (i_pwd.U):
1118 This variable conditionally defines PWQUOTA, which indicates
1119 that struct passwd contains pw_quota.
1121 d_quad (quadtype.U):
1122 This variable, if defined, tells that there's a 64-bit integer type,
1125 d_readdir (d_readdir.U):
1126 This variable conditionally defines HAS_READDIR if readdir() is
1127 available to read directory entries.
1129 d_readlink (d_readlink.U):
1130 This variable conditionally defines the HAS_READLINK symbol, which
1131 indicates to the C program that the readlink() routine is available
1132 to read the value of a symbolic link.
1134 d_rename (d_rename.U):
1135 This variable conditionally defines the HAS_RENAME symbol, which
1136 indicates to the C program that the rename() routine is available
1139 d_rewinddir (d_readdir.U):
1140 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1143 d_rmdir (d_rmdir.U):
1144 This variable conditionally defines HAS_RMDIR if rmdir() is
1145 available to remove directories.
1147 d_safebcpy (d_safebcpy.U):
1148 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1149 the bcopy() routine can do overlapping copies.
1151 d_safemcpy (d_safemcpy.U):
1152 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1153 the memcpy() routine can do overlapping copies.
1155 d_sanemcmp (d_sanemcmp.U):
1156 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1157 the memcpy() routine is available and can be used to compare relative
1158 magnitudes of chars with their high bits set.
1160 d_sched_yield (d_pthread_y.U):
1161 This variable conditionally defines the HAS_SCHED_YIELD
1162 symbol if the sched_yield routine is available to yield
1163 the execution of the current thread.
1165 d_scm_rights (d_socket.U):
1166 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1167 which indicates that the SCM_RIGHTS is available. #ifdef is
1168 not enough because it may be an enum, glibc has been known to do this.
1170 d_seekdir (d_readdir.U):
1171 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1174 d_select (d_select.U):
1175 This variable conditionally defines HAS_SELECT if select() is
1176 available to select active file descriptors. A <sys/time.h>
1177 inclusion may be necessary for the timeout field.
1180 This variable conditionally defines the HAS_SEM symbol, which
1181 indicates that the entire sem*(2) library is present.
1183 d_semctl (d_semctl.U):
1184 This variable conditionally defines the HAS_SEMCTL symbol, which
1185 indicates to the C program that the semctl() routine is available.
1187 d_semctl_semid_ds (d_union_semun.U):
1188 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1189 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1191 d_semctl_semun (d_union_semun.U):
1192 This variable conditionally defines USE_SEMCTL_SEMUN, which
1193 indicates that union semun is to be used for semctl IPC_STAT.
1195 d_semget (d_semget.U):
1196 This variable conditionally defines the HAS_SEMGET symbol, which
1197 indicates to the C program that the semget() routine is available.
1199 d_semop (d_semop.U):
1200 This variable conditionally defines the HAS_SEMOP symbol, which
1201 indicates to the C program that the semop() routine is available.
1203 d_setegid (d_setegid.U):
1204 This variable conditionally defines the HAS_SETEGID symbol, which
1205 indicates to the C program that the setegid() routine is available
1206 to change the effective gid of the current program.
1208 d_seteuid (d_seteuid.U):
1209 This variable conditionally defines the HAS_SETEUID symbol, which
1210 indicates to the C program that the seteuid() routine is available
1211 to change the effective uid of the current program.
1213 d_setgrent (d_setgrent.U):
1214 This variable conditionally defines the HAS_SETGRENT symbol, which
1215 indicates to the C program that the setgrent() routine is available
1216 for initializing sequential access to the group database.
1218 d_setgrps (d_setgrps.U):
1219 This variable conditionally defines the HAS_SETGROUPS symbol, which
1220 indicates to the C program that the setgroups() routine is available
1221 to set the list of process groups.
1223 d_sethent (d_sethent.U):
1224 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1227 d_setlinebuf (d_setlnbuf.U):
1228 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1229 indicates to the C program that the setlinebuf() routine is available
1230 to change stderr or stdout from block-buffered or unbuffered to a
1233 d_setlocale (d_setlocale.U):
1234 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1235 available to handle locale-specific ctype implementations.
1237 d_setnent (d_setnent.U):
1238 This variable conditionally defines HAS_SETNETENT if setnetent() is
1241 d_setpent (d_setpent.U):
1242 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1245 d_setpgid (d_setpgid.U):
1246 This variable conditionally defines the HAS_SETPGID symbol if the
1247 setpgid(pid, gpid) function is available to set process group ID.
1249 d_setpgrp2 (d_setpgrp2.U):
1250 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1251 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1252 is available to set the current process group.
1254 d_setpgrp (d_setpgrp.U):
1255 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1256 available to set the current process group.
1258 d_setprior (d_setprior.U):
1259 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1260 is available to set a process's priority.
1262 d_setpwent (d_setpwent.U):
1263 This variable conditionally defines the HAS_SETPWENT symbol, which
1264 indicates to the C program that the setpwent() routine is available
1265 for initializing sequential access to the passwd database.
1267 d_setregid (d_setregid.U):
1268 This variable conditionally defines HAS_SETREGID if setregid() is
1269 available to change the real and effective gid of the current
1272 d_setresgid (d_setregid.U):
1273 This variable conditionally defines HAS_SETRESGID if setresgid() is
1274 available to change the real, effective and saved gid of the current
1277 d_setresuid (d_setreuid.U):
1278 This variable conditionally defines HAS_SETREUID if setresuid() is
1279 available to change the real, effective and saved uid of the current
1282 d_setreuid (d_setreuid.U):
1283 This variable conditionally defines HAS_SETREUID if setreuid() is
1284 available to change the real and effective uid of the current
1287 d_setrgid (d_setrgid.U):
1288 This variable conditionally defines the HAS_SETRGID symbol, which
1289 indicates to the C program that the setrgid() routine is available
1290 to change the real gid of the current program.
1292 d_setruid (d_setruid.U):
1293 This variable conditionally defines the HAS_SETRUID symbol, which
1294 indicates to the C program that the setruid() routine is available
1295 to change the real uid of the current program.
1297 d_setsent (d_setsent.U):
1298 This variable conditionally defines HAS_SETSERVENT if setservent() is
1301 d_setsid (d_setsid.U):
1302 This variable conditionally defines HAS_SETSID if setsid() is
1303 available to set the process group ID.
1305 d_setspent (d_setspent.U):
1306 This variable conditionally defines HAS_SETSPENT if setspent() is
1307 available to initialize the scan of SysV shadow password entries.
1309 d_setvbuf (d_setvbuf.U):
1310 This variable conditionally defines the HAS_SETVBUF symbol, which
1311 indicates to the C program that the setvbuf() routine is available
1312 to change buffering on an open stdio stream.
1315 This variable conditionally defines the USE_SFIO symbol,
1316 and indicates whether sfio is available (and should be used).
1319 This variable conditionally defines the HAS_SHM symbol, which
1320 indicates that the entire shm*(2) library is present.
1322 d_shmat (d_shmat.U):
1323 This variable conditionally defines the HAS_SHMAT symbol, which
1324 indicates to the C program that the shmat() routine is available.
1326 d_shmatprototype (d_shmat.U):
1327 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1328 symbol, which indicates that sys/shm.h has a prototype for
1331 d_shmctl (d_shmctl.U):
1332 This variable conditionally defines the HAS_SHMCTL symbol, which
1333 indicates to the C program that the shmctl() routine is available.
1335 d_shmdt (d_shmdt.U):
1336 This variable conditionally defines the HAS_SHMDT symbol, which
1337 indicates to the C program that the shmdt() routine is available.
1339 d_shmget (d_shmget.U):
1340 This variable conditionally defines the HAS_SHMGET symbol, which
1341 indicates to the C program that the shmget() routine is available.
1343 d_sigaction (d_sigaction.U):
1344 This variable conditionally defines the HAS_SIGACTION symbol, which
1345 indicates that the Vr4 sigaction() routine is available.
1347 d_sigsetjmp (d_sigsetjmp.U):
1348 This variable conditionally defines the HAS_SIGSETJMP symbol,
1349 which indicates that the sigsetjmp() routine is available to
1350 call setjmp() and optionally save the process's signal mask.
1352 d_socket (d_socket.U):
1353 This variable conditionally defines HAS_SOCKET, which indicates
1354 that the BSD socket interface is supported.
1356 d_sockpair (d_socket.U):
1357 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1358 indicates that the BSD socketpair() is supported.
1360 d_sqrtl (d_sqrtl.U):
1361 This variable conditionally defines the HAS_SQRTL symbol, which
1362 indicates to the C program that the sqrtl() routine is available.
1364 d_statblks (d_statblks.U):
1365 This variable conditionally defines USE_STAT_BLOCKS
1366 if this system has a stat structure declaring
1367 st_blksize and st_blocks.
1369 d_statfs_f_flags (d_statfs_f_flags.U):
1370 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1371 symbol, which indicates to struct statfs from has f_flags member.
1372 This kind of struct statfs is coming from sys/mount.h (BSD),
1373 not from sys/statfs.h (SYSV).
1375 d_statfs_s (d_statfs_s.U):
1376 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1377 which indicates that the struct statfs is supported.
1379 d_statvfs (d_statvfs.U):
1380 This variable conditionally defines the HAS_STATVFS symbol, which
1381 indicates to the C program that the statvfs() routine is available.
1383 d_stdio_cnt_lval (d_stdstdio.U):
1384 This variable conditionally defines STDIO_CNT_LVALUE if the
1385 FILE_cnt macro can be used as an lvalue.
1387 d_stdio_ptr_lval (d_stdstdio.U):
1388 This variable conditionally defines STDIO_PTR_LVALUE if the
1389 FILE_ptr macro can be used as an lvalue.
1391 d_stdio_stream_array (stdio_streams.U):
1392 This variable tells whether there is an array holding
1395 d_stdiobase (d_stdstdio.U):
1396 This variable conditionally defines USE_STDIO_BASE if this system
1397 has a FILE structure declaring a usable _base field (or equivalent)
1400 d_stdstdio (d_stdstdio.U):
1401 This variable conditionally defines USE_STDIO_PTR if this system
1402 has a FILE structure declaring usable _ptr and _cnt fields (or
1403 equivalent) in stdio.h.
1405 d_strchr (d_strchr.U):
1406 This variable conditionally defines HAS_STRCHR if strchr() and
1407 strrchr() are available for string searching.
1409 d_strcoll (d_strcoll.U):
1410 This variable conditionally defines HAS_STRCOLL if strcoll() is
1411 available to compare strings using collating information.
1413 d_strctcpy (d_strctcpy.U):
1414 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1415 indicates to the C program that this C compiler knows how to copy
1418 d_strerrm (d_strerror.U):
1419 This variable holds what Strerrr is defined as to translate an error
1420 code condition into an error message string. It could be 'strerror'
1421 or a more complex macro emulating strrror with sys_errlist[], or the
1422 "unknown" string when both strerror and sys_errlist are missing.
1424 d_strerror (d_strerror.U):
1425 This variable conditionally defines HAS_STRERROR if strerror() is
1426 available to translate error numbers to strings.
1428 d_strtod (d_strtod.U):
1429 This variable conditionally defines the HAS_STRTOD symbol, which
1430 indicates to the C program that the strtod() routine is available
1431 to provide better numeric string conversion than atof().
1433 d_strtol (d_strtol.U):
1434 This variable conditionally defines the HAS_STRTOL symbol, which
1435 indicates to the C program that the strtol() routine is available
1436 to provide better numeric string conversion than atoi() and friends.
1438 d_strtold (d_strtold.U):
1439 This variable conditionally defines the HAS_STRTOLD symbol, which
1440 indicates to the C program that the strtold() routine is available.
1442 d_strtoll (d_strtoll.U):
1443 This variable conditionally defines the HAS_STRTOLL symbol, which
1444 indicates to the C program that the strtoll() routine is available.
1446 d_strtoul (d_strtoul.U):
1447 This variable conditionally defines the HAS_STRTOUL symbol, which
1448 indicates to the C program that the strtoul() routine is available
1449 to provide conversion of strings to unsigned long.
1451 d_strtoull (d_strtoull.U):
1452 This variable conditionally defines the HAS_STRTOULL symbol, which
1453 indicates to the C program that the strtoull() routine is available.
1455 d_strtouq (d_strtouq.U):
1456 This variable conditionally defines the HAS_STRTOUQ symbol, which
1457 indicates to the C program that the strtouq() routine is available.
1459 d_strxfrm (d_strxfrm.U):
1460 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1461 available to transform strings.
1463 d_suidsafe (d_dosuid.U):
1464 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1465 if setuid scripts can be secure. This test looks in /dev/fd/.
1467 d_symlink (d_symlink.U):
1468 This variable conditionally defines the HAS_SYMLINK symbol, which
1469 indicates to the C program that the symlink() routine is available
1470 to create symbolic links.
1472 d_syscall (d_syscall.U):
1473 This variable conditionally defines HAS_SYSCALL if syscall() is
1474 available call arbitrary system calls.
1476 d_sysconf (d_sysconf.U):
1477 This variable conditionally defines the HAS_SYSCONF symbol, which
1478 indicates to the C program that the sysconf() routine is available
1479 to determine system related limits and options.
1481 d_sysernlst (d_strerror.U):
1482 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1483 is available to translate error numbers to the symbolic name.
1485 d_syserrlst (d_strerror.U):
1486 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1487 available to translate error numbers to strings.
1489 d_system (d_system.U):
1490 This variable conditionally defines HAS_SYSTEM if system() is
1491 available to issue a shell command.
1493 d_tcgetpgrp (d_tcgtpgrp.U):
1494 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1495 indicates to the C program that the tcgetpgrp() routine is available.
1496 to get foreground process group ID.
1498 d_tcsetpgrp (d_tcstpgrp.U):
1499 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1500 indicates to the C program that the tcsetpgrp() routine is available
1501 to set foreground process group ID.
1503 d_telldir (d_readdir.U):
1504 This variable conditionally defines HAS_TELLDIR if telldir() is
1507 d_telldirproto (d_telldirproto.U):
1508 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1509 which indicates to the C program that the system provides
1510 a prototype for the telldir() function. Otherwise, it is
1511 up to the program to supply one.
1514 This variable conditionally defines the HAS_TIME symbol, which indicates
1515 that the time() routine exists. The time() routine is normaly
1516 provided on UNIX systems.
1518 d_times (d_times.U):
1519 This variable conditionally defines the HAS_TIMES symbol, which indicates
1520 that the times() routine exists. The times() routine is normaly
1521 provided on UNIX systems. You may have to include <sys/times.h>.
1523 d_truncate (d_truncate.U):
1524 This variable conditionally defines HAS_TRUNCATE if truncate() is
1525 available to truncate files.
1527 d_tzname (d_tzname.U):
1528 This variable conditionally defines HAS_TZNAME if tzname[] is
1529 available to access timezone names.
1531 d_umask (d_umask.U):
1532 This variable conditionally defines the HAS_UMASK symbol, which
1533 indicates to the C program that the umask() routine is available.
1534 to set and get the value of the file creation mask.
1536 d_uname (d_gethname.U):
1537 This variable conditionally defines the HAS_UNAME symbol, which
1538 indicates to the C program that the uname() routine may be
1539 used to derive the host name.
1541 d_union_semun (d_union_semun.U):
1542 This variable conditionally defines HAS_UNION_SEMUN if the
1543 union semun is defined by including <sys/sem.h>.
1545 d_ustat (d_ustat.U):
1546 This variable conditionally defines HAS_USTAT if ustat() is
1547 available to query file system statistics by dev_t.
1549 d_vendorbin (vendorbin.U):
1550 This variable conditionally defines PERL_VENDORBIN.
1552 d_vendorlib (vendorlib.U):
1553 This variable conditionally defines PERL_VENDORLIB.
1555 d_vfork (d_vfork.U):
1556 This variable conditionally defines the HAS_VFORK symbol, which
1557 indicates the vfork() routine is available.
1559 d_void_closedir (d_closedir.U):
1560 This variable conditionally defines VOID_CLOSEDIR if closedir()
1561 does not return a value.
1563 d_voidsig (d_voidsig.U):
1564 This variable conditionally defines VOIDSIG if this system
1565 declares "void (*signal(...))()" in signal.h. The old way was to
1566 declare it as "int (*signal(...))()".
1568 d_voidtty (i_sysioctl.U):
1569 This variable conditionally defines USE_IOCNOTTY to indicate that the
1570 ioctl() call with TIOCNOTTY should be used to void tty association.
1571 Otherwise (on USG probably), it is enough to close the standard file
1572 decriptors and do a setpgrp().
1574 d_volatile (d_volatile.U):
1575 This variable conditionally defines the HASVOLATILE symbol, which
1576 indicates to the C program that this C compiler knows about the
1577 volatile declaration.
1579 d_vprintf (d_vprintf.U):
1580 This variable conditionally defines the HAS_VPRINTF symbol, which
1581 indicates to the C program that the vprintf() routine is available
1582 to printf with a pointer to an argument list.
1584 d_wait4 (d_wait4.U):
1585 This variable conditionally defines the HAS_WAIT4 symbol, which
1586 indicates the wait4() routine is available.
1588 d_waitpid (d_waitpid.U):
1589 This variable conditionally defines HAS_WAITPID if waitpid() is
1590 available to wait for child process.
1592 d_wcstombs (d_wcstombs.U):
1593 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1594 indicates to the C program that the wcstombs() routine is available
1595 to convert wide character strings to multibyte strings.
1597 d_wctomb (d_wctomb.U):
1598 This variable conditionally defines the HAS_WCTOMB symbol, which
1599 indicates to the C program that the wctomb() routine is available
1600 to convert a wide character to a multibyte.
1603 This variable conditionally defines the symbol XENIX, which alerts
1604 the C program that it runs under Xenix.
1607 This variable is used internally by Configure to determine the
1608 full pathname (if any) of the date program. After Configure runs,
1609 the value is reset to a plain "date" and is not useful.
1611 db_hashtype (i_db.U):
1612 This variable contains the type of the hash structure element
1613 in the <db.h> header file. In older versions of DB, it was
1614 int, while in newer ones it is u_int32_t.
1616 db_prefixtype (i_db.U):
1617 This variable contains the type of the prefix structure element
1618 in the <db.h> header file. In older versions of DB, it was
1619 int, while in newer ones it is size_t.
1621 defvoidused (voidflags.U):
1622 This variable contains the default value of the VOIDUSED symbol (15).
1624 direntrytype (i_dirent.U):
1625 This symbol is set to 'struct direct' or 'struct dirent' depending on
1626 whether dirent is available or not. You should use this pseudo type to
1627 portably declare your directory entries.
1630 This variable contains the extension that is to be used for the
1631 dynamically loaded modules that perl generaties.
1634 This variable contains the name of the dynamic loading file that
1635 will be used with the package.
1637 doublesize (doublesize.U):
1638 This variable contains the value of the DOUBLESIZE symbol, which
1639 indicates to the C program how many bytes there are in a double.
1641 drand01 (randfunc.U):
1642 Indicates the macro to be used to generate normalized
1643 random numbers. Uses randfunc, often divided by
1644 (double) (((unsigned long) 1 << randbits)) in order to
1645 normalize the result.
1646 In C programs, the macro 'Drand01' is mapped to drand01.
1648 dynamic_ext (Extensions.U):
1649 This variable holds a list of XS extension files we want to
1650 link dynamically into the package. It is used by Makefile.
1652 eagain (nblock_io.U):
1653 This variable bears the symbolic errno code set by read() when no
1654 data is present on the file and non-blocking I/O was enabled (otherwise,
1655 read() blocks naturally).
1658 This variable conditionally defines EBCDIC if this
1659 system uses EBCDIC encoding. Among other things, this
1660 means that the character ranges are not contiguous.
1664 This variable is used internally by Configure to determine the
1665 full pathname (if any) of the echo program. After Configure runs,
1666 the value is reset to a plain "echo" and is not useful.
1669 This variable is used internally by Configure to determine the
1670 full pathname (if any) of the egrep program. After Configure runs,
1671 the value is reset to a plain "egrep" and is not useful.
1674 This variable is defined but not used by Configure.
1675 The value is a plain '' and is not useful.
1678 When running under Eunice this variable contains a command which will
1679 convert a shell script to the proper form of text file for it to be
1680 executable by the shell. On other systems it is a no-op.
1683 This is an old synonym for _exe.
1686 This variable is used internally by Configure to determine the
1687 full pathname (if any) of the expr program. After Configure runs,
1688 the value is reset to a plain "expr" and is not useful.
1690 extensions (Extensions.U):
1691 This variable holds a list of all extension files (both XS and
1692 non-xs linked into the package. It is propagated to Config.pm
1693 and is typically used to test whether a particular extesion
1696 fflushall (fflushall.U):
1697 This symbol, if defined, tells that to flush
1698 all pending stdio output one must loop through all
1699 the stdio file handles stored in an array and fflush them.
1700 Note that if fflushNULL is defined, fflushall will not
1701 even be probed for and will be left undefined.
1703 fflushNULL (fflushall.U):
1704 This symbol, if defined, tells that fflush(NULL) does flush
1705 all pending stdio output.
1708 This variable is defined but not used by Configure.
1709 The value is a plain '' and is not useful.
1711 firstmakefile (Unix.U):
1712 This variable defines the first file searched by make. On unix,
1713 it is makefile (then Makefile). On case-insensitive systems,
1714 it might be something else. This is only used to deal with
1715 convoluted make depend tricks.
1718 This variable is defined but not used by Configure.
1719 The value is a plain '' and is not useful.
1721 fpossize (fpossize.U):
1722 This variable contains the size of a fpostype in bytes.
1724 fpostype (fpostype.U):
1725 This variable defines Fpos_t to be something like fpos_t, long,
1726 uint, or whatever type is used to declare file positions in libc.
1728 freetype (mallocsrc.U):
1729 This variable contains the return type of free(). It is usually
1730 void, but occasionally int.
1733 This variable contains the full pathname to 'ar', whether or
1734 not the user has specified 'portability'. This is only used
1738 This variable contains the full pathname to 'csh', whether or
1739 not the user has specified 'portability'. This is only used
1740 in the compiled C program, and we assume that all systems which
1741 can share this executable will have the same full pathname to
1744 full_sed (Loc_sed.U):
1745 This variable contains the full pathname to 'sed', whether or
1746 not the user has specified 'portability'. This is only used
1747 in the compiled C program, and we assume that all systems which
1748 can share this executable will have the same full pathname to
1752 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1753 indicate whether the compiler is version 1 or 2. This is used in
1754 setting some of the default cflags. It is set to '' if not gcc.
1757 This variable contains the format string used for printing a Gid_t.
1759 gidsign (gidsign.U):
1760 This variable contains the signedness of a gidtype.
1761 1 for unsigned, -1 for signed.
1763 gidsize (gidsize.U):
1764 This variable contains the size of a gidtype in bytes.
1766 gidtype (gidtype.U):
1767 This variable defines Gid_t to be something like gid_t, int,
1768 ushort, or whatever type is used to declare the return type
1769 of getgid(). Typically, it is the type of group ids in the kernel.
1772 This variable holds the general path (space-separated) used to
1773 find libraries. It may contain directories that do not exist on
1774 this platform, libpth is the cleaned-up version.
1777 This variable is used internally by Configure to determine the
1778 full pathname (if any) of the grep program. After Configure runs,
1779 the value is reset to a plain "grep" and is not useful.
1782 This variable contains a command that produces the text of the
1783 /etc/group file. This is normally "cat /etc/group", but can be
1784 "ypcat group" when NIS is used.
1785 On some systems, such as os390, there may be no equivalent
1786 command, in which case this variable is unset.
1788 groupstype (groupstype.U):
1789 This variable defines Groups_t to be something like gid_t, int,
1790 ushort, or whatever type is used for the second argument to
1791 getgroups() and setgroups(). Usually, this is the same as
1792 gidtype (gid_t), but sometimes it isn't.
1795 This variable is used internally by Configure to determine the
1796 full pathname (if any) of the gzip program. After Configure runs,
1797 the value is reset to a plain "gzip" and is not useful.
1799 h_fcntl (h_fcntl.U):
1800 This is variable gets set in various places to tell i_fcntl that
1801 <fcntl.h> should be included.
1803 h_sysfile (h_sysfile.U):
1804 This is variable gets set in various places to tell i_sys_file that
1805 <sys/file.h> should be included.
1808 Gives the type of hints used for previous answers. May be one of
1809 "default", "recommended" or "previous".
1812 This variable contains a command that produces the text of the
1813 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1814 "ypcat hosts" when NIS is used.
1815 On some systems, such as os390, there may be no equivalent
1816 command, in which case this variable is unset.
1819 This variable contains a flag which will tell the C compiler and loader
1820 to produce a program running with a huge memory model. If the
1821 huge model is not supported, contains the flag to produce large
1822 model programs. It is up to the Makefile to use this.
1825 This variable is the size of an I16 in bytes.
1828 This variable contains the C type used for Perl's I16.
1831 This variable is the size of an I32 in bytes.
1834 This variable contains the C type used for Perl's I32.
1837 This variable is the size of an I64 in bytes.
1840 This variable contains the C type used for Perl's I64.
1843 This variable is the size of an I8 in bytes.
1846 This variable contains the C type used for Perl's I8.
1848 i_arpainet (i_arpainet.U):
1849 This variable conditionally defines the I_ARPA_INET symbol,
1850 and indicates whether a C program should include <arpa/inet.h>.
1852 i_bsdioctl (i_sysioctl.U):
1853 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1854 indicates to the C program that <sys/bsdioctl.h> exists and should
1858 This variable conditionally defines the I_DB symbol, and indicates
1859 whether a C program may include Berkeley's DB include file <db.h>.
1862 This variable conditionally defines the I_DBM symbol, which
1863 indicates to the C program that <dbm.h> exists and should
1866 i_dirent (i_dirent.U):
1867 This variable conditionally defines I_DIRENT, which indicates
1868 to the C program that it should include <dirent.h>.
1871 This variable conditionally defines the I_DLD symbol, which
1872 indicates to the C program that <dld.h> (GNU dynamic loading)
1873 exists and should be included.
1875 i_dlfcn (i_dlfcn.U):
1876 This variable conditionally defines the I_DLFCN symbol, which
1877 indicates to the C program that <dlfcn.h> exists and should
1880 i_fcntl (i_fcntl.U):
1881 This variable controls the value of I_FCNTL (which tells
1882 the C program to include <fcntl.h>).
1884 i_float (i_float.U):
1885 This variable conditionally defines the I_FLOAT symbol, and indicates
1886 whether a C program may include <float.h> to get symbols like DBL_MAX
1887 or DBL_MIN, i.e. machine dependent floating point values.
1890 This variable conditionally defines the I_GDBM symbol, which
1891 indicates to the C program that <gdbm.h> exists and should
1895 This variable conditionally defines the I_GRP symbol, and indicates
1896 whether a C program should include <grp.h>.
1898 i_iconv (i_iconv.U):
1899 This variable conditionally defines the I_ICONV symbol, and indicates
1900 whether a C program should include <iconv.h>.
1902 i_inttypes (i_inttypes.U):
1903 This variable conditionally defines the I_INTTYPES symbol,
1904 and indicates whether a C program should include <inttypes.h>.
1906 i_limits (i_limits.U):
1907 This variable conditionally defines the I_LIMITS symbol, and indicates
1908 whether a C program may include <limits.h> to get symbols like WORD_BIT
1911 i_locale (i_locale.U):
1912 This variable conditionally defines the I_LOCALE symbol,
1913 and indicates whether a C program should include <locale.h>.
1915 i_machcthr (i_machcthr.U):
1916 This variable conditionally defines the I_MACH_CTHREADS symbol,
1917 and indicates whether a C program should include <mach/cthreads.h>.
1919 i_malloc (i_malloc.U):
1920 This variable conditionally defines the I_MALLOC symbol, and indicates
1921 whether a C program should include <malloc.h>.
1924 This variable conditionally defines the I_MATH symbol, and indicates
1925 whether a C program may include <math.h>.
1927 i_memory (i_memory.U):
1928 This variable conditionally defines the I_MEMORY symbol, and indicates
1929 whether a C program should include <memory.h>.
1931 i_mntent (i_mntent.U):
1932 This variable conditionally defines the I_MNTENT symbol, and indicates
1933 whether a C program should include <mntent.h>.
1936 This variable conditionally defines the I_NDBM symbol, which
1937 indicates to the C program that <ndbm.h> exists and should
1940 i_netdb (i_netdb.U):
1941 This variable conditionally defines the I_NETDB symbol, and indicates
1942 whether a C program should include <netdb.h>.
1944 i_neterrno (i_neterrno.U):
1945 This variable conditionally defines the I_NET_ERRNO symbol, which
1946 indicates to the C program that <net/errno.h> exists and should
1949 i_netinettcp (i_netinettcp.U):
1950 This variable conditionally defines the I_NETINET_TCP symbol,
1951 and indicates whether a C program should include <netinet/tcp.h>.
1954 This variable conditionally defines I_NETINET_IN, which indicates
1955 to the C program that it should include <netinet/in.h>. Otherwise,
1956 you may try <sys/in.h>.
1959 This variable conditionally defines the I_POLL symbol, and indicates
1960 whether a C program should include <poll.h>.
1962 i_pthread (i_pthread.U):
1963 This variable conditionally defines the I_PTHREAD symbol,
1964 and indicates whether a C program should include <pthread.h>.
1967 This variable conditionally defines I_PWD, which indicates
1968 to the C program that it should include <pwd.h>.
1970 i_rpcsvcdbm (i_dbm.U):
1971 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1972 indicates to the C program that <rpcsvc/dbm.h> exists and should
1973 be included. Some System V systems might need this instead of <dbm.h>.
1976 This variable conditionally defines the I_SFIO symbol,
1977 and indicates whether a C program should include <sfio.h>.
1979 i_sgtty (i_termio.U):
1980 This variable conditionally defines the I_SGTTY symbol, which
1981 indicates to the C program that it should include <sgtty.h> rather
1984 i_shadow (i_shadow.U):
1985 This variable conditionally defines the I_SHADOW symbol, and indicates
1986 whether a C program should include <shadow.h>.
1988 i_socks (i_socks.U):
1989 This variable conditionally defines the I_SOCKS symbol, and indicates
1990 whether a C program should include <socks.h>.
1992 i_stdarg (i_varhdr.U):
1993 This variable conditionally defines the I_STDARG symbol, which
1994 indicates to the C program that <stdarg.h> exists and should
1997 i_stddef (i_stddef.U):
1998 This variable conditionally defines the I_STDDEF symbol, which
1999 indicates to the C program that <stddef.h> exists and should
2002 i_stdlib (i_stdlib.U):
2003 This variable conditionally defines the I_STDLIB symbol, which
2004 indicates to the C program that <stdlib.h> exists and should
2007 i_string (i_string.U):
2008 This variable conditionally defines the I_STRING symbol, which
2009 indicates that <string.h> should be included rather than <strings.h>.
2011 i_sysaccess (i_sysaccess.U):
2012 This variable conditionally defines the I_SYS_ACCESS symbol,
2013 and indicates whether a C program should include <sys/access.h>.
2015 i_sysdir (i_sysdir.U):
2016 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2017 whether a C program should include <sys/dir.h>.
2019 i_sysfile (i_sysfile.U):
2020 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2021 whether a C program should include <sys/file.h> to get R_OK and friends.
2023 i_sysfilio (i_sysioctl.U):
2024 This variable conditionally defines the I_SYS_FILIO symbol, which
2025 indicates to the C program that <sys/filio.h> exists and should
2026 be included in preference to <sys/ioctl.h>.
2029 This variable conditionally defines I_SYS_IN, which indicates
2030 to the C program that it should include <sys/in.h> instead of
2033 i_sysioctl (i_sysioctl.U):
2034 This variable conditionally defines the I_SYS_IOCTL symbol, which
2035 indicates to the C program that <sys/ioctl.h> exists and should
2038 i_sysmman (i_sysmman.U):
2039 This variable conditionally defines the I_SYS_MMAN symbol, and
2040 indicates whether a C program should include <sys/mman.h>.
2042 i_sysmount (i_sysmount.U):
2043 This variable conditionally defines the I_SYSMOUNT symbol,
2044 and indicates whether a C program should include <sys/mount.h>.
2046 i_sysndir (i_sysndir.U):
2047 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2048 whether a C program should include <sys/ndir.h>.
2050 i_sysparam (i_sysparam.U):
2051 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2052 whether a C program should include <sys/param.h>.
2054 i_sysresrc (i_sysresrc.U):
2055 This variable conditionally defines the I_SYS_RESOURCE symbol,
2056 and indicates whether a C program should include <sys/resource.h>.
2058 i_syssecrt (i_syssecrt.U):
2059 This variable conditionally defines the I_SYS_SECURITY symbol,
2060 and indicates whether a C program should include <sys/security.h>.
2062 i_sysselct (i_sysselct.U):
2063 This variable conditionally defines I_SYS_SELECT, which indicates
2064 to the C program that it should include <sys/select.h> in order to
2065 get the definition of struct timeval.
2067 i_syssockio (i_sysioctl.U):
2068 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2069 C program that socket ioctl codes may be found in <sys/sockio.h>
2070 instead of <sys/ioctl.h>.
2072 i_sysstat (i_sysstat.U):
2073 This variable conditionally defines the I_SYS_STAT symbol,
2074 and indicates whether a C program should include <sys/stat.h>.
2076 i_sysstatfs (i_sysstatfs.U):
2077 This variable conditionally defines the I_SYSSTATFS symbol,
2078 and indicates whether a C program should include <sys/statfs.h>.
2080 i_sysstatvfs (i_sysstatvfs.U):
2081 This variable conditionally defines the I_SYSSTATVFS symbol,
2082 and indicates whether a C program should include <sys/statvfs.h>.
2084 i_systime (i_time.U):
2085 This variable conditionally defines I_SYS_TIME, which indicates
2086 to the C program that it should include <sys/time.h>.
2088 i_systimek (i_time.U):
2089 This variable conditionally defines I_SYS_TIME_KERNEL, which
2090 indicates to the C program that it should include <sys/time.h>
2091 with KERNEL defined.
2093 i_systimes (i_systimes.U):
2094 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2095 whether a C program should include <sys/times.h>.
2097 i_systypes (i_systypes.U):
2098 This variable conditionally defines the I_SYS_TYPES symbol,
2099 and indicates whether a C program should include <sys/types.h>.
2101 i_sysuio (i_sysuio.U):
2102 This variable conditionally defines the I_SYSUIO symbol, and indicates
2103 whether a C program should include <sys/uio.h>.
2105 i_sysun (i_sysun.U):
2106 This variable conditionally defines I_SYS_UN, which indicates
2107 to the C program that it should include <sys/un.h> to get UNIX
2108 domain socket definitions.
2110 i_sysvfs (i_sysvfs.U):
2111 This variable conditionally defines the I_SYSVFS symbol,
2112 and indicates whether a C program should include <sys/vfs.h>.
2114 i_syswait (i_syswait.U):
2115 This variable conditionally defines I_SYS_WAIT, which indicates
2116 to the C program that it should include <sys/wait.h>.
2118 i_termio (i_termio.U):
2119 This variable conditionally defines the I_TERMIO symbol, which
2120 indicates to the C program that it should include <termio.h> rather
2123 i_termios (i_termio.U):
2124 This variable conditionally defines the I_TERMIOS symbol, which
2125 indicates to the C program that the POSIX <termios.h> file is
2129 This variable conditionally defines I_TIME, which indicates
2130 to the C program that it should include <time.h>.
2132 i_unistd (i_unistd.U):
2133 This variable conditionally defines the I_UNISTD symbol, and indicates
2134 whether a C program should include <unistd.h>.
2136 i_ustat (i_ustat.U):
2137 This variable conditionally defines the I_USTAT symbol, and indicates
2138 whether a C program should include <ustat.h>.
2140 i_utime (i_utime.U):
2141 This variable conditionally defines the I_UTIME symbol, and indicates
2142 whether a C program should include <utime.h>.
2144 i_values (i_values.U):
2145 This variable conditionally defines the I_VALUES symbol, and indicates
2146 whether a C program may include <values.h> to get symbols like MAXLONG
2149 i_varargs (i_varhdr.U):
2150 This variable conditionally defines I_VARARGS, which indicates
2151 to the C program that it should include <varargs.h>.
2153 i_varhdr (i_varhdr.U):
2154 Contains the name of the header to be included to get va_dcl definition.
2155 Typically one of varargs.h or stdarg.h.
2157 i_vfork (i_vfork.U):
2158 This variable conditionally defines the I_VFORK symbol, and indicates
2159 whether a C program should include vfork.h.
2161 ignore_versioned_solibs (libs.U):
2162 This variable should be non-empty if non-versioned shared
2163 libraries (libfoo.so.x.y) are to be ignored (because they
2164 cannot be linked against).
2166 inc_version_list (inc_version_list.U):
2167 This variable specifies the list of subdirectories in over
2168 which perl.c:incpush() and lib/lib.pm will automatically
2169 search when adding directories to @INC. The elements in
2170 the list are separated by spaces. This is only useful
2171 if you have a perl library directory tree structured like the
2172 default one. See INSTALL for how this works. The versioned
2173 site_perl directory was introduced in 5.005, so that is the
2174 lowest possible value.
2176 inc_version_list_init (inc_version_list.U):
2177 This variable holds the same list as inc_version_list, but
2178 each item is enclosed in double quotes and separated by commas,
2179 suitable for use in the PERL_INC_VERSION_LIST initialization.
2182 This variable must preceed the normal include path to get hte
2183 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2184 Value can be "" or "/bsd43" on mips.
2187 This variable is defined but not used by Configure.
2188 The value is a plain '' and is not useful.
2190 installarchlib (archlib.U):
2191 This variable is really the same as archlibexp but may differ on
2192 those systems using AFS. For extra portability, only this variable
2193 should be used in makefiles.
2196 This variable is the same as binexp unless AFS is running in which case
2197 the user is explicitely prompted for it. This variable should always
2198 be used in your makefiles for maximum portability.
2200 installman1dir (man1dir.U):
2201 This variable is really the same as man1direxp, unless you are using
2202 AFS in which case it points to the read/write location whereas
2203 man1direxp only points to the read-only access location. For extra
2204 portability, you should only use this variable within your makefiles.
2206 installman3dir (man3dir.U):
2207 This variable is really the same as man3direxp, unless you are using
2208 AFS in which case it points to the read/write location whereas
2209 man3direxp only points to the read-only access location. For extra
2210 portability, you should only use this variable within your makefiles.
2212 installprefix (installprefix.U):
2213 This variable holds the name of the directory below which
2214 "make install" will install the package. For most users, this
2215 is the same as prefix. However, it is useful for
2216 installing the software into a different (usually temporary)
2217 location after which it can be bundled up and moved somehow
2218 to the final location specified by prefix.
2220 installprefixexp (installprefix.U):
2221 This variable holds the full absolute path of installprefix
2222 with all ~-expansion done.
2224 installprivlib (privlib.U):
2225 This variable is really the same as privlibexp but may differ on
2226 those systems using AFS. For extra portability, only this variable
2227 should be used in makefiles.
2229 installscript (scriptdir.U):
2230 This variable is usually the same as scriptdirexp, unless you are on
2231 a system running AFS, in which case they may differ slightly. You
2232 should always use this variable within your makefiles for portability.
2234 installsitearch (sitearch.U):
2235 This variable is really the same as sitearchexp but may differ on
2236 those systems using AFS. For extra portability, only this variable
2237 should be used in makefiles.
2239 installsitebin (sitebin.U):
2240 This variable is usually the same as sitebinexp, unless you are on
2241 a system running AFS, in which case they may differ slightly. You
2242 should always use this variable within your makefiles for portability.
2244 installsitelib (sitelib.U):
2245 This variable is really the same as sitelibexp but may differ on
2246 those systems using AFS. For extra portability, only this variable
2247 should be used in makefiles.
2249 installstyle (installstyle.U):
2250 This variable describes the "style" of the perl installation.
2251 This is intended to be useful for tools that need to
2252 manipulate entire perl distributions. Perl itself doesn't use
2253 this to find its libraries -- the library directories are
2254 stored directly in Config.pm. Currently, there are only two
2255 styles: "lib" and "lib/perl5". The default library locations
2256 (e.g. privlib, sitelib) are either $prefix/lib or
2257 $prefix/lib/perl5. The former is useful if $prefix is a
2258 directory dedicated to perl (e.g. /opt/perl), while the latter
2259 is useful if $prefix is shared by many packages, e.g. if
2261 This may later be extended to include other information, so
2262 be careful with pattern-matching on the results.
2263 For compatibility with perl5.005 and earlier, the default
2264 setting is based on whether or not $prefix contains the string
2267 installusrbinperl (instubperl.U):
2268 This variable tells whether Perl should be installed also as
2269 /usr/bin/perl in addition to
2272 installvendorbin (vendorbin.U):
2273 This variable is really the same as vendorbinexp but may differ on
2274 those systems using AFS. For extra portability, only this variable
2275 should be used in makefiles.
2277 installvendorlib (vendorlib.U):
2278 This variable is really the same as vendorlibexp but may differ on
2279 those systems using AFS. For extra portability, only this variable
2280 should be used in makefiles.
2282 intsize (intsize.U):
2283 This variable contains the value of the INTSIZE symbol, which
2284 indicates to the C program how many bytes there are in an int.
2286 ivdformat (perlxvf.U):
2287 This variable contains the format string used for printing
2288 a Perl IV as a signed decimal integer.
2291 This variable is the size of an IV in bytes.
2294 This variable contains the C type used for Perl's IV.
2296 known_extensions (Extensions.U):
2297 This variable holds a list of all XS extensions included in
2301 This variable is defined but not used by Configure.
2302 The value is a plain '' and is not useful.
2305 This variable contains a flag which will tell the C compiler and loader
2306 to produce a program running with a large memory model. It is up to
2307 the Makefile to use this.
2310 This variable indicates the program to be used to link
2311 libraries for dynamic loading. On some systems, it is 'ld'.
2312 On ELF systems, it should be $cc. Mostly, we'll try to respect
2313 the hint file setting.
2315 lddlflags (dlsrc.U):
2316 This variable contains any special flags that might need to be
2317 passed to $ld to create a shared library suitable for dynamic
2318 loading. It is up to the makefile to use it. For hpux, it
2319 should be '-b'. For sunos 4.1, it is empty.
2321 ldflags (ccflags.U):
2322 This variable contains any additional C loader flags desired by
2323 the user. It is up to the Makefile to use this.
2325 ldlibpthname (libperl.U):
2326 This variable holds the name of the shared library
2327 search path, often LD_LIBRARY_PATH. To get an empty
2328 string, the hints file must set this to 'none'.
2331 This variable is used internally by Configure to determine the
2332 full pathname (if any) of the less program. After Configure runs,
2333 the value is reset to a plain "less" and is not useful.
2336 This is an old synonym for _a.
2339 This variable contains the location of the C library.
2341 libperl (libperl.U):
2342 The perl executable is obtained by linking perlmain.c with
2343 libperl, any static extensions (usually just DynaLoader),
2344 and any other libraries needed on this system. libperl
2345 is usually libperl.a, but can also be libperl.so.xxx if
2346 the user wishes to build a perl executable with a shared
2350 This variable holds the general path (space-separated) used to find
2351 libraries. It is intended to be used by other units.
2354 This variable holds the additional libraries we want to use.
2355 It is up to the Makefile to deal with it.
2358 This variable holds the directory names aka dirnames of the libraries
2359 we found and accepted, duplicates are removed.
2362 This variable holds the filenames aka basenames of the libraries
2363 we found and accepted.
2366 This variable holds the full pathnames of the libraries
2367 we found and accepted.
2369 libswanted (Myinit.U):
2370 This variable holds a list of all the libraries we want to
2371 search. The order is chosen to pick up the c library
2372 ahead of ucb or bsd libraries for SVR4.
2375 This variable is defined but not used by Configure.
2376 The value is a plain '' and is not useful.
2379 This variable is defined but not used by Configure.
2380 The value is a plain '' and is not useful.
2382 lkflags (ccflags.U):
2383 This variable contains any additional C partial linker flags desired by
2384 the user. It is up to the Makefile to use this.
2387 This variable is used internally by Configure to determine the
2388 full pathname (if any) of the ln program. After Configure runs,
2389 the value is reset to a plain "ln" and is not useful.
2392 This variable holds the name of the command to make
2393 symbolic links (if they are supported). It can be used
2394 in the Makefile. It is either 'ln -s' or 'ln'
2396 locincpth (ccflags.U):
2397 This variable contains a list of additional directories to be
2398 searched by the compiler. The appropriate '-I' directives will
2399 be added to ccflags. This is intended to simplify setting
2400 local directories from the Configure command line.
2401 It's not much, but it parallels the loclibpth stuff in libpth.U.
2403 loclibpth (libpth.U):
2404 This variable holds the paths (space-separated) used to find local
2405 libraries. It is prepended to libpth, and is intended to be easily
2406 set from the command line.
2408 longdblsize (d_longdbl.U):
2409 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2410 indicates to the C program how many bytes there are in a long double,
2411 if this system supports long doubles.
2413 longlongsize (d_longlong.U):
2414 This variable contains the value of the LONGLONGSIZE symbol, which
2415 indicates to the C program how many bytes there are in a long long,
2416 if this system supports long long.
2418 longsize (intsize.U):
2419 This variable contains the value of the LONGSIZE symbol, which
2420 indicates to the C program how many bytes there are in a long.
2423 This variable is defined but not used by Configure.
2424 The value is a plain '' and is not useful.
2427 This variable is defined but not used by Configure.
2428 The value is a plain '' and is not useful.
2431 This variable is used internally by Configure to determine the
2432 full pathname (if any) of the ls program. After Configure runs,
2433 the value is reset to a plain "ls" and is not useful.
2435 lseeksize (lseektype.U):
2436 This variable defines lseektype to be something like off_t, long,
2437 or whatever type is used to declare lseek offset's type in the
2438 kernel (which also appears to be lseek's return type).
2440 lseektype (lseektype.U):
2441 This variable defines lseektype to be something like off_t, long,
2442 or whatever type is used to declare lseek offset's type in the
2443 kernel (which also appears to be lseek's return type).
2446 This variable is defined but not used by Configure.
2447 The value is a plain '' and is not useful.
2450 This variable is defined but not used by Configure.
2451 The value is a plain '' and is not useful.
2454 This variable is used internally by Configure to determine the
2455 full pathname (if any) of the make program. After Configure runs,
2456 the value is reset to a plain "make" and is not useful.
2458 make_set_make (make.U):
2459 Some versions of 'make' set the variable MAKE. Others do not.
2460 This variable contains the string to be included in Makefile.SH
2461 so that MAKE is set if needed, and not if not needed.
2462 Possible values are:
2463 make_set_make='#' # If your make program handles this for you,
2464 make_set_make="MAKE=$make" # if it doesn't.
2465 I used a comment character so that we can distinguish a
2466 'set' value (from a previous config.sh or Configure '-D' option)
2467 from an uncomputed value.
2469 mallocobj (mallocsrc.U):
2470 This variable contains the name of the malloc.o that this package
2471 generates, if that malloc.o is preferred over the system malloc.
2472 Otherwise the value is null. This variable is intended for generating
2473 Makefiles. See mallocsrc.
2475 mallocsrc (mallocsrc.U):
2476 This variable contains the name of the malloc.c that comes with
2477 the package, if that malloc.c is preferred over the system malloc.
2478 Otherwise the value is null. This variable is intended for generating
2481 malloctype (mallocsrc.U):
2482 This variable contains the kind of ptr returned by malloc and realloc.
2484 man1dir (man1dir.U):
2485 This variable contains the name of the directory in which manual
2486 source pages are to be put. It is the responsibility of the
2487 Makefile.SH to get the value of this into the proper command.
2488 You must be prepared to do the ~name expansion yourself.
2490 man1direxp (man1dir.U):
2491 This variable is the same as the man1dir variable, but is filename
2492 expanded at configuration time, for convenient use in makefiles.
2494 man1ext (man1dir.U):
2495 This variable contains the extension that the manual page should
2496 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2499 man3dir (man3dir.U):
2500 This variable contains the name of the directory in which manual
2501 source pages are to be put. It is the responsibility of the
2502 Makefile.SH to get the value of this into the proper command.
2503 You must be prepared to do the ~name expansion yourself.
2505 man3direxp (man3dir.U):
2506 This variable is the same as the man3dir variable, but is filename
2507 expanded at configuration time, for convenient use in makefiles.
2509 man3ext (man3dir.U):
2510 This variable contains the extension that the manual page should
2511 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2515 This variable is used internally by Configure to determine the
2516 full pathname (if any) of the Mcc program. After Configure runs,
2517 the value is reset to a plain "Mcc" and is not useful.
2520 This variable contains a flag which will tell the C compiler and loader
2521 to produce a program running with a medium memory model. If the
2522 medium model is not supported, contains the flag to produce large
2523 model programs. It is up to the Makefile to use this.
2525 mips_type (usrinc.U):
2526 This variable holds the environment type for the mips system.
2527 Possible values are "BSD 4.3" and "System V".
2530 This variable is used internally by Configure to determine the
2531 full pathname (if any) of the mkdir program. After Configure runs,
2532 the value is reset to a plain "mkdir" and is not useful.
2534 mmaptype (d_mmap.U):
2535 This symbol contains the type of pointer returned by mmap()
2536 (and simultaneously the type of the first argument).
2537 It can be 'void *' or 'caddr_t'.
2540 This variable contains the list of memory models supported by this
2541 system. Possible component values are none, split, unsplit, small,
2542 medium, large, and huge. The component values are space separated.
2544 modetype (modetype.U):
2545 This variable defines modetype to be something like mode_t,
2546 int, unsigned short, or whatever type is used to declare file
2547 modes for system calls.
2550 This variable is used internally by Configure to determine the
2551 full pathname (if any) of the more program. After Configure runs,
2552 the value is reset to a plain "more" and is not useful.
2554 multiarch (multiarch.U):
2555 This variable conditionally defines the MULTIARCH symbol
2556 which signifies the presence of multiplatform files.
2557 This is normally set by hints files.
2560 This variable is defined but not used by Configure.
2561 The value is a plain '' and is not useful.
2563 myarchname (archname.U):
2564 This variable holds the architecture name computed by Configure in
2565 a previous run. It is not intended to be perused by any user and
2566 should never be set in a hint file.
2568 mydomain (myhostname.U):
2569 This variable contains the eventual value of the MYDOMAIN symbol,
2570 which is the domain of the host the program is going to run on.
2571 The domain must be appended to myhostname to form a complete host name.
2572 The dot comes with mydomain, and need not be supplied by the program.
2574 myhostname (myhostname.U):
2575 This variable contains the eventual value of the MYHOSTNAME symbol,
2576 which is the name of the host the program is going to run on.
2577 The domain is not kept with hostname, but must be gotten from mydomain.
2578 The dot comes with mydomain, and need not be supplied by the program.
2580 myuname (Oldconfig.U):
2581 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2582 pseudo variables assignments in the output are stripped, thank you. The
2583 whole thing is then lower-cased.
2586 This variable contains the '-n' flag if that is what causes the echo
2587 command to suppress newline. Otherwise it is null. Correct usage is
2588 $echo $n "prompt for a question: $c".
2590 netdb_hlen_type (netdbtype.U):
2591 This variable holds the type used for the 2nd argument to
2592 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2593 This is only useful if you have gethostbyaddr(), naturally.
2595 netdb_host_type (netdbtype.U):
2596 This variable holds the type used for the 1st argument to
2597 gethostbyaddr(). Usually, this is char * or void *, possibly
2598 with or without a const prefix.
2599 This is only useful if you have gethostbyaddr(), naturally.
2601 netdb_name_type (netdbtype.U):
2602 This variable holds the type used for the argument to
2603 gethostbyname(). Usually, this is char * or const char *.
2604 This is only useful if you have gethostbyname(), naturally.
2606 netdb_net_type (netdbtype.U):
2607 This variable holds the type used for the 1st argument to
2608 getnetbyaddr(). Usually, this is int or long.
2609 This is only useful if you have getnetbyaddr(), naturally.
2612 This variable is used internally by Configure to determine the
2613 full pathname (if any) of the nm program. After Configure runs,
2614 the value is reset to a plain "nm" and is not useful.
2617 This variable holds the options that may be necessary for nm.
2619 nm_so_opt (usenm.U):
2620 This variable holds the options that may be necessary for nm
2621 to work on a shared library but that can not be used on an
2622 archive library. Currently, this is only used by Linux, where
2623 nm --dynamic is *required* to get symbols from an ELF library which
2624 has been stripped, but nm --dynamic is *fatal* on an archive library.
2625 Maybe Linux should just always set usenm=false.
2627 nonxs_ext (Extensions.U):
2628 This variable holds a list of all non-xs extensions included
2629 in the package. All of them will be built.
2632 This variable is used internally by Configure to determine the
2633 full pathname (if any) of the nroff program. After Configure runs,
2634 the value is reset to a plain "nroff" and is not useful.
2637 This variable is the size of an NV in bytes.
2640 This variable contains the C type used for Perl's NV.
2642 o_nonblock (nblock_io.U):
2643 This variable bears the symbol value to be used during open() or fcntl()
2644 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2645 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2646 but that is only supported by some devices.
2649 This is an old synonym for _o.
2651 old_pthread_create_joinable (d_pthrattrj.U):
2652 This variable defines the constant to use for creating joinable
2653 (aka undetached) pthreads. Unused if pthread.h defines
2654 PTHREAD_CREATE_JOINABLE. If used, possible values are
2655 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2657 optimize (ccflags.U):
2658 This variable contains any optimizer/debugger flag that should be used.
2659 It is up to the Makefile to use it.
2661 orderlib (orderlib.U):
2662 This variable is "true" if the components of libraries must be ordered
2663 (with `lorder $* | tsort`) before placing them in an archive. Set to
2664 "false" if ranlib or ar can generate random libraries.
2666 osname (Oldconfig.U):
2667 This variable contains the operating system name (e.g. sunos,
2668 solaris, hpux, etc.). It can be useful later on for setting
2669 defaults. Any spaces are replaced with underscores. It is set
2670 to a null string if we can't figure it out.
2672 osvers (Oldconfig.U):
2673 This variable contains the operating system version (e.g.
2674 4.1.3, 5.2, etc.). It is primarily used for helping select
2675 an appropriate hints file, but might be useful elsewhere for
2676 setting defaults. It is set to '' if we can't figure it out.
2677 We try to be flexible about how much of the version number
2678 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2679 same for this package, hints files might just be os_4.0 or
2680 os_4.1, etc., not keeping separate files for each little release.
2682 package (package.U):
2683 This variable contains the name of the package being constructed.
2684 It is primarily intended for the use of later Configure units.
2687 This variable contains the name of the preferred pager on the system.
2688 Usual values are (the full pathnames of) more, less, pg, or cat.
2691 This variable contains a command that produces the text of the
2692 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2693 "ypcat passwd" when NIS is used.
2694 On some systems, such as os390, there may be no equivalent
2695 command, in which case this variable is unset.
2697 patchlevel (patchlevel.U):
2698 The patchlevel level of this package.
2699 The value of patchlevel comes from the patchlevel.h file.
2700 In a version number such as 5.6.1, this is the "6".
2701 In patchlevel.h, this is referred to as the "PERL_VERSION".
2704 This is an old synonym for p_ in Head.U, the character
2705 used to separate elements in the command shell search PATH.
2708 This variable is used internally by Configure to determine the
2709 full pathname (if any) of the perl program. After Configure runs,
2710 the value is reset to a plain "perl" and is not useful.
2712 PERL_REVISION (Oldsyms.U):
2713 In a Perl version number such as 5.6.2, this is the 5.
2714 This value is manually set in patchlevel.h
2716 PERL_SUBVERSION (Oldsyms.U):
2717 In a Perl version number such as 5.6.2, this is the 2.
2718 Values greater than 50 represent potentially unstable
2719 development subversions.
2720 This value is manually set in patchlevel.h
2722 PERL_VERSION (Oldsyms.U):
2723 In a Perl version number such as 5.6.2, this is the 6.
2724 This value is manually set in patchlevel.h
2726 perladmin (perladmin.U):
2727 Electronic mail address of the perl5 administrator.
2729 perlpath (perlpath.U):
2730 This variable contains the eventual value of the PERLPATH symbol,
2731 which contains the name of the perl interpreter to be used in
2732 shell scripts and in the "eval 'exec'" idiom.
2735 This variable is used internally by Configure to determine the
2736 full pathname (if any) of the pg program. After Configure runs,
2737 the value is reset to a plain "pg" and is not useful.
2739 phostname (myhostname.U):
2740 This variable contains the eventual value of the PHOSTNAME symbol,
2741 which is a command that can be fed to popen() to get the host name.
2742 The program should probably not presume that the domain is or isn't
2745 pidtype (pidtype.U):
2746 This variable defines PIDTYPE to be something like pid_t, int,
2747 ushort, or whatever type is used to declare process ids in the kernel.
2750 Holds the private path used by Configure to find out the libraries.
2751 Its value is prepend to libpth. This variable takes care of special
2752 machines, like the mips. Usually, it should be empty.
2754 pm_apiversion (xs_apiversion.U):
2755 This variable contains the version of the oldest perl
2756 compatible with the present perl. (That is, pure perl modules
2757 written for $pm_apiversion will still work for the current
2758 version). perl.c:incpush() and lib/lib.pm will automatically
2759 search in $sitelib for older directories across major versions
2760 back to pm_apiversion. This is only useful if you have a perl
2761 library directory tree structured like the default one. The
2762 versioned site_perl library was introduced in 5.005, so that's
2763 the default setting for this variable. It's hard to imagine
2764 it changing before Perl6. It is included here for symmetry
2765 with xs_apiveprsion -- the searching algorithms will
2766 (presumably) be similar.
2767 See the INSTALL file for how this works.
2770 This variable is defined but not used by Configure.
2771 The value is a plain '' and is not useful.
2774 This variable is defined but not used by Configure.
2775 The value is a plain '' and is not useful.
2778 This variable holds the name of the directory below which the
2779 user will install the package. Usually, this is /usr/local, and
2780 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2781 man pages in /usr/local/man, etc. It is only used to set defaults
2782 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2784 prefixexp (prefix.U):
2785 This variable holds the full absolute path of the directory below
2786 which the user will install the package. Derived from prefix.
2788 privlib (privlib.U):
2789 This variable contains the eventual value of the PRIVLIB symbol,
2790 which is the name of the private library for this package. It may
2791 have a ~ on the front. It is up to the makefile to eventually create
2792 this directory while performing installation (with ~ substitution).
2794 privlibexp (privlib.U):
2795 This variable is the ~name expanded version of privlib, so that you
2796 may use it directly in Makefiles or shell scripts.
2798 prototype (prototype.U):
2799 This variable holds the eventual value of CAN_PROTOTYPE, which
2800 indicates the C compiler can handle funciton prototypes.
2802 ptrsize (ptrsize.U):
2803 This variable contains the value of the PTRSIZE symbol, which
2804 indicates to the C program how many bytes there are in a pointer.
2806 quadkind (quadtype.U):
2807 This variable, if defined, encodes the type of a quad:
2808 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2810 quadtype (quadtype.U):
2811 This variable defines Quad_t to be something like long, int,
2812 long long, int64_t, or whatever type is used for 64-bit integers.
2814 randbits (randfunc.U):
2815 Indicates how many bits are produced by the function used to
2816 generate normalized random numbers.
2818 randfunc (randfunc.U):
2819 Indicates the name of the random number function to use.
2820 Values include drand48, random, and rand. In C programs,
2821 the 'Drand01' macro is defined to generate uniformly distributed
2822 random numbers over the range [0., 1.[ (see drand01 and nrand).
2824 randseedtype (randfunc.U):
2825 Indicates the type of the argument of the seedfunc.
2827 ranlib (orderlib.U):
2828 This variable is set to the pathname of the ranlib program, if it is
2829 needed to generate random libraries. Set to ":" if ar can generate
2830 random libraries or if random libraries are not supported
2832 rd_nodata (nblock_io.U):
2833 This variable holds the return code from read() when no data is
2834 present. It should be -1, but some systems return 0 when O_NDELAY is
2835 used, which is a shame because you cannot make the difference between
2836 no data and an EOF.. Sigh!
2839 This variable is used internally by Configure to determine the
2840 full pathname (if any) of the rm program. After Configure runs,
2841 the value is reset to a plain "rm" and is not useful.
2844 This variable is defined but not used by Configure.
2845 The value is a plain '' and is not useful.
2848 This variable contains 'true' or 'false' depending whether the
2849 nm extraction should be performed or not, according to the value
2850 of usenm and the flags on the Configure command line.
2852 sched_yield (d_pthread_y.U):
2853 This variable defines the way to yield the execution
2854 of the current thread.
2856 scriptdir (scriptdir.U):
2857 This variable holds the name of the directory in which the user wants
2858 to put publicly scripts for the package in question. It is either
2859 the same directory as for binaries, or a special one that can be
2860 mounted across different architectures, like /usr/share. Programs
2861 must be prepared to deal with ~name expansion.
2863 scriptdirexp (scriptdir.U):
2864 This variable is the same as scriptdir, but is filename expanded
2865 at configuration time, for programs not wanting to bother with it.
2868 This variable is used internally by Configure to determine the
2869 full pathname (if any) of the sed program. After Configure runs,
2870 the value is reset to a plain "sed" and is not useful.
2872 seedfunc (randfunc.U):
2873 Indicates the random number generating seed function.
2874 Values include srand48, srandom, and srand.
2876 selectminbits (selectminbits.U):
2877 This variable holds the minimum number of bits operated by select.
2878 That is, if you do select(n, ...), how many bits at least will be
2879 cleared in the masks if some activity is detected. Usually this
2880 is either n or 32*ceil(n/32), especially many little-endians do
2881 the latter. This is only useful if you have select(), naturally.
2883 selecttype (selecttype.U):
2884 This variable holds the type used for the 2nd, 3rd, and 4th
2885 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2886 is defined, and 'int *' otherwise. This is only useful if you
2887 have select(), naturally.
2890 This variable is defined but not used by Configure.
2891 The value is a plain '' and is not useful.
2894 This variable contains the full pathname of the shell used
2895 on this system to execute Bourne shell scripts. Usually, this will be
2896 /bin/sh, though it's possible that some systems will have /bin/ksh,
2897 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2899 This unit comes before Options.U, so you can't set sh with a '-D'
2900 option, though you can override this (and startsh)
2901 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2904 This variable is defined but not used by Configure.
2905 The value is a plain '' and is not useful.
2907 sharpbang (spitshell.U):
2908 This variable contains the string #! if this system supports that
2911 shmattype (d_shmat.U):
2912 This symbol contains the type of pointer returned by shmat().
2913 It can be 'void *' or 'char *'.
2915 shortsize (intsize.U):
2916 This variable contains the value of the SHORTSIZE symbol which
2917 indicates to the C program how many bytes there are in a short.
2919 shrpenv (libperl.U):
2920 If the user builds a shared libperl.so, then we need to tell the
2921 'perl' executable where it will be able to find the installed libperl.so.
2922 One way to do this on some systems is to set the environment variable
2923 LD_RUN_PATH to the directory that will be the final location of the
2924 shared libperl.so. The makefile can use this with something like
2925 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2927 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2930 See the main perl Makefile.SH for actual working usage.
2931 Alternatively, we might be able to use a command line option such
2932 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2933 $archlibexp/CORE (Linux).
2935 shsharp (spitshell.U):
2936 This variable tells further Configure units whether your sh can
2939 sig_count (sig_name.U):
2940 This variable holds a number larger than the largest valid
2941 signal number. This is usually the same as the NSIG macro.
2943 sig_name (sig_name.U):
2944 This variable holds the signal names, space separated. The leading
2945 SIG in signal name is removed. A ZERO is prepended to the
2946 list. This is currently not used.
2948 sig_name_init (sig_name.U):
2949 This variable holds the signal names, enclosed in double quotes and
2950 separated by commas, suitable for use in the SIG_NAME definition
2951 below. A "ZERO" is prepended to the list, and the list is
2952 terminated with a plain 0. The leading SIG in signal names
2953 is removed. See sig_num.
2955 sig_num (sig_name.U):
2956 This variable holds the signal numbers, space separated. A ZERO is
2957 prepended to the list (corresponding to the fake SIGZERO), and
2958 the list is terminated with a 0. Those numbers correspond to
2959 the value of the signal listed in the same place within the
2962 sig_num_init (sig_name.U):
2963 This variable holds the signal numbers, enclosed in double quotes and
2964 separated by commas, suitable for use in the SIG_NUM definition
2965 below. A "ZERO" is prepended to the list, and the list is
2966 terminated with a plain 0.
2968 signal_t (d_voidsig.U):
2969 This variable holds the type of the signal handler (void or int).
2971 sitearch (sitearch.U):
2972 This variable contains the eventual value of the SITEARCH symbol,
2973 which is the name of the private library for this package. It may
2974 have a ~ on the front. It is up to the makefile to eventually create
2975 this directory while performing installation (with ~ substitution).
2976 The standard distribution will put nothing in this directory.
2977 After perl has been installed, users may install their own local
2978 architecture-dependent modules in this directory with
2979 MakeMaker Makefile.PL
2980 or equivalent. See INSTALL for details.
2982 sitearchexp (sitearch.U):
2983 This variable is the ~name expanded version of sitearch, so that you
2984 may use it directly in Makefiles or shell scripts.
2986 sitebin (sitebin.U):
2987 This variable holds the name of the directory in which the user wants
2988 to put add-on publicly executable files for the package in question. It
2989 is most often a local directory such as /usr/local/bin. Programs using
2990 this variable must be prepared to deal with ~name substitution.
2991 The standard distribution will put nothing in this directory.
2992 After perl has been installed, users may install their own local
2993 executables in this directory with
2994 MakeMaker Makefile.PL
2995 or equivalent. See INSTALL for details.
2997 sitebinexp (sitebin.U):
2998 This is the same as the sitebin variable, but is filename expanded at
2999 configuration time, for use in your makefiles.
3001 sitelib (sitelib.U):
3002 This variable contains the eventual value of the SITELIB symbol,
3003 which is the name of the private library for this package. It may
3004 have a ~ on the front. It is up to the makefile to eventually create
3005 this directory while performing installation (with ~ substitution).
3006 The standard distribution will put nothing in this directory.
3007 After perl has been installed, users may install their own local
3008 architecture-independent modules in this directory with
3009 MakeMaker Makefile.PL
3010 or equivalent. See INSTALL for details.
3012 sitelibexp (sitelib.U):
3013 This variable is the ~name expanded version of sitelib, so that you
3014 may use it directly in Makefiles or shell scripts.
3016 siteprefix (siteprefix.U):
3017 This variable holds the full absolute path of the directory below
3018 which the user will install add-on packages.
3019 See INSTALL for usage and examples.
3021 siteprefixexp (siteprefix.U):
3022 This variable holds the full absolute path of the directory below
3023 which the user will install add-on packages. Derived from siteprefix.
3025 sizetype (sizetype.U):
3026 This variable defines sizetype to be something like size_t,
3027 unsigned long, or whatever type is used to declare length
3028 parameters for string functions.
3031 This variable is defined but not used by Configure.
3032 The value is a plain '' and is not useful.
3035 This variable is defined but not used by Configure.
3036 The value is a plain '' and is not useful.
3039 This variable contains a flag which will tell the C compiler and loader
3040 to produce a program running with a small memory model. It is up to
3041 the Makefile to use this.
3044 This variable holds the extension used to identify shared libraries
3045 (also known as shared objects) on the system. Usually set to 'so'.
3047 sockethdr (d_socket.U):
3048 This variable has any cpp '-I' flags needed for socket support.
3050 socketlib (d_socket.U):
3051 This variable has the names of any libraries needed for socket support.
3054 This variable is used internally by Configure to determine the
3055 full pathname (if any) of the sort program. After Configure runs,
3056 the value is reset to a plain "sort" and is not useful.
3058 spackage (package.U):
3059 This variable contains the name of the package being constructed,
3060 with the first letter uppercased, i.e. suitable for starting
3063 spitshell (spitshell.U):
3064 This variable contains the command necessary to spit out a runnable
3065 shell on this system. It is either cat or a grep '-v' for # comments.
3068 This variable contains a flag which will tell the C compiler and loader
3069 to produce a program that will run in separate I and D space, for those
3070 machines that support separation of instruction and data space. It is
3071 up to the Makefile to use this.
3073 sPRId64 (quadfio.U):
3074 This variable, if defined, contains the string used by stdio to
3075 format 64-bit decimal numbers (format 'd') for output.
3077 sPRIeldbl (longdblfio.U):
3078 This variable, if defined, contains the string used by stdio to
3079 format long doubles (format 'e') for output.
3081 sPRIEldbl (longdblfio.U):
3082 This variable, if defined, contains the string used by stdio to
3083 format long doubles (format 'E') for output.
3085 sPRIfldbl (longdblfio.U):
3086 This variable, if defined, contains the string used by stdio to
3087 format long doubles (format 'f') for output.
3089 sPRIFldbl (longdblfio.U):
3090 This variable, if defined, contains the string used by stdio to
3091 format long doubles (format 'F') for output.
3093 sPRIgldbl (longdblfio.U):
3094 This variable, if defined, contains the string used by stdio to
3095 format long doubles (format 'g') for output.
3097 sPRIGldbl (longdblfio.U):
3098 This variable, if defined, contains the string used by stdio to
3099 format long doubles (format 'G') for output.
3101 sPRIi64 (quadfio.U):
3102 This variable, if defined, contains the string used by stdio to
3103 format 64-bit decimal numbers (format 'i') for output.
3105 sPRIo64 (quadfio.U):
3106 This variable, if defined, contains the string used by stdio to
3107 format 64-bit octal numbers (format 'o') for output.
3109 sPRIu64 (quadfio.U):
3110 This variable, if defined, contains the string used by stdio to
3111 format 64-bit unsigned decimal numbers (format 'u') for output.
3113 sPRIx64 (quadfio.U):
3114 This variable, if defined, contains the string used by stdio to
3115 format 64-bit hexadecimal numbers (format 'x') for output.
3117 sPRIX64 (quadfio.U):
3118 This variable, if defined, contains the string used by stdio to
3119 format 64-bit hExADECimAl numbers (format 'X') for output.
3122 This variable holds the path to the package source. It is up to
3123 the Makefile to use this variable and set VPATH accordingly to
3124 find the sources remotely.
3126 ssizetype (ssizetype.U):
3127 This variable defines ssizetype to be something like ssize_t,
3128 long or int. It is used by functions that return a count
3129 of bytes or an error condition. It must be a signed type.
3130 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3132 startperl (startperl.U):
3133 This variable contains the string to put on the front of a perl
3134 script to make sure (hopefully) that it runs with perl and not some
3135 shell. Of course, that leading line must be followed by the classical
3137 eval 'exec perl -S $0 ${1+"$@"}'
3138 if $running_under_some_shell;
3139 to guarantee perl startup should the shell execute the script. Note
3140 that this magic incatation is not understood by csh.
3142 startsh (startsh.U):
3143 This variable contains the string to put on the front of a shell
3144 script to make sure (hopefully) that it runs with sh and not some
3147 static_ext (Extensions.U):
3148 This variable holds a list of XS extension files we want to
3149 link statically into the package. It is used by Makefile.
3151 stdchar (stdchar.U):
3152 This variable conditionally defines STDCHAR to be the type of char
3153 used in stdio.h. It has the values "unsigned char" or "char".
3155 stdio_base (d_stdstdio.U):
3156 This variable defines how, given a FILE pointer, fp, to access the
3157 _base field (or equivalent) of stdio.h's FILE structure. This will
3158 be used to define the macro FILE_base(fp).
3160 stdio_bufsiz (d_stdstdio.U):
3161 This variable defines how, given a FILE pointer, fp, to determine
3162 the number of bytes store in the I/O buffer pointer to by the
3163 _base field (or equivalent) of stdio.h's FILE structure. This will
3164 be used to define the macro FILE_bufsiz(fp).
3166 stdio_cnt (d_stdstdio.U):
3167 This variable defines how, given a FILE pointer, fp, to access the
3168 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3169 be used to define the macro FILE_cnt(fp).
3171 stdio_filbuf (d_stdstdio.U):
3172 This variable defines how, given a FILE pointer, fp, to tell
3173 stdio to refill it's internal buffers (?). This will
3174 be used to define the macro FILE_filbuf(fp).
3176 stdio_ptr (d_stdstdio.U):
3177 This variable defines how, given a FILE pointer, fp, to access the
3178 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3179 be used to define the macro FILE_ptr(fp).
3181 stdio_stream_array (stdio_streams.U):
3182 This variable tells the name of the array holding the stdio streams.
3183 Usual values include _iob, __iob, and __sF.
3185 strings (i_string.U):
3186 This variable holds the full path of the string header that will be
3187 used. Typically /usr/include/string.h or /usr/include/strings.h.
3190 This variable is defined but not used by Configure.
3191 The value is a plain '' and is not useful.
3193 subversion (patchlevel.U):
3194 The subversion level of this package.
3195 The value of subversion comes from the patchlevel.h file.
3196 In a version number such as 5.6.1, this is the "1".
3197 This is unique to perl.
3200 This variable holds the place where the manual is located on this
3201 system. It is not the place where the user wants to put his manual
3202 pages. Rather it is the place where Configure may look to find manual
3203 for unix commands (section 1 of the manual usually). See mansrc.
3206 This variable is defined but not used by Configure.
3207 The value is a plain '' and is not useful.
3210 This variable is defined but not used by Configure.
3211 The value is a plain '' and is not useful.
3214 This variable is defined but not used by Configure.
3215 The value is a plain '' and is not useful.
3218 This variable is defined but not used by Configure.
3219 The value is a plain '' and is not useful.
3222 This variable is used internally by Configure to determine the
3223 full pathname (if any) of the test program. After Configure runs,
3224 the value is reset to a plain "test" and is not useful.
3226 timeincl (i_time.U):
3227 This variable holds the full path of the included time header(s).
3229 timetype (d_time.U):
3230 This variable holds the type returned by time(). It can be long,
3231 or time_t on BSD sites (in which case <sys/types.h> should be
3232 included). Anyway, the type Time_t should be used.
3235 This variable is used internally by Configure to determine the
3236 full pathname (if any) of the touch program. After Configure runs,
3237 the value is reset to a plain "touch" and is not useful.
3240 This variable is used internally by Configure to determine the
3241 full pathname (if any) of the tr program. After Configure runs,
3242 the value is reset to a plain "tr" and is not useful.
3245 This variable contains the value to be passed to the tr(1)
3246 command to transliterate a newline. Typical values are
3247 '\012' and '\n'. This is needed for EBCDIC systems where
3248 newline is not necessarily '\012'.
3251 This variable is defined but not used by Configure.
3252 The value is a plain '' and is not useful.
3255 This variable is the size of an U16 in bytes.
3258 This variable contains the C type used for Perl's U16.
3261 This variable is the size of an U32 in bytes.
3264 This variable contains the C type used for Perl's U32.
3267 This variable is the size of an U64 in bytes.
3270 This variable contains the C type used for Perl's U64.
3273 This variable is the size of an U8 in bytes.
3276 This variable contains the C type used for Perl's U8.
3279 This variable contains the format string used for printing a Uid_t.
3281 uidsign (uidsign.U):
3282 This variable contains the signedness of a uidtype.
3283 1 for unsigned, -1 for signed.
3285 uidsize (uidsize.U):
3286 This variable contains the size of a uidtype in bytes.
3288 uidtype (uidtype.U):
3289 This variable defines Uid_t to be something like uid_t, int,
3290 ushort, or whatever type is used to declare user ids in the kernel.
3293 This variable is used internally by Configure to determine the
3294 full pathname (if any) of the uname program. After Configure runs,
3295 the value is reset to a plain "uname" and is not useful.
3298 This variable is used internally by Configure to determine the
3299 full pathname (if any) of the uniq program. After Configure runs,
3300 the value is reset to a plain "uniq" and is not useful.
3302 uquadtype (quadtype.U):
3303 This variable defines Uquad_t to be something like unsigned long,
3304 unsigned int, unsigned long long, uint64_t, or whatever type is
3305 used for 64-bit integers.
3307 use5005threads (usethreads.U):
3308 This variable conditionally defines the USE_5005THREADS symbol,
3309 and indicates that Perl should be built to use the 5.005-based
3310 threading implementation.
3312 use64bits (use64bits.U):
3313 This variable conditionally defines the USE_64_BITS symbol,
3314 and indicates that 64-bit integer types should be used
3318 This variable indicates if the system supports dynamic
3319 loading of some sort. See also dlsrc and dlobj.
3321 useithreads (usethreads.U):
3322 This variable conditionally defines the USE_ITHREADS symbol,
3323 and indicates that Perl should be built to use the interpreter-based
3324 threading implementation.
3326 uselargefiles (uselfs.U):
3327 This variable conditionally defines the USE_LARGE_FILES symbol,
3328 and indicates that large file interfaces should be used when
3329 available. The use64bits symbol will also be turned on if necessary.
3331 uselongdouble (uselongdbl.U):
3332 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3333 and indicates that long doubles should be used when available.
3335 uselonglong (uselonglong.U):
3336 This variable conditionally defines the USE_LONG_LONG symbol,
3337 and indicates that long longs should be used when available.
3339 usemorebits (usemorebits.U):
3340 This variable conditionally defines the USE_MORE_BITS symbol,
3341 and indicates that explicit 64-bit interfaces and long doubles
3342 should be used when available.
3344 usemultiplicity (usemultiplicity.U):
3345 This variable conditionally defines the MULTIPLICITY symbol,
3346 and indicates that Perl should be built to use multiplicity.
3348 usemymalloc (mallocsrc.U):
3349 This variable contains y if the malloc that comes with this package
3350 is desired over the system's version of malloc. People often include
3351 special versions of malloc for effiency, but such versions are often
3352 less portable. See also mallocsrc and mallocobj.
3353 If this is 'y', then -lmalloc is removed from $libs.
3356 This variable contains 'true' or 'false' depending whether the
3357 nm extraction is wanted or not.
3359 useopcode (Extensions.U):
3360 This variable holds either 'true' or 'false' to indicate
3361 whether the Opcode extension should be used. The sole
3362 use for this currently is to allow an easy mechanism
3363 for users to skip the Opcode extension from the Configure
3366 useperlio (useperlio.U):
3367 This variable conditionally defines the USE_PERLIO symbol,
3368 and indicates that the PerlIO abstraction should be
3371 useposix (Extensions.U):
3372 This variable holds either 'true' or 'false' to indicate
3373 whether the POSIX extension should be used. The sole
3374 use for this currently is to allow an easy mechanism
3375 for hints files to indicate that POSIX will not compile
3376 on a particular system.
3379 This variable is set to true when the user agrees to use sfio.
3380 It is set to false when sfio is not available or when the user
3381 explicitely requests not to use sfio. It is here primarily so
3382 that command-line settings can override the auto-detection of
3383 d_sfio without running into a "WHOA THERE".
3385 useshrplib (libperl.U):
3386 This variable is set to 'yes' if the user wishes
3387 to build a shared libperl, and 'no' otherwise.
3389 usesocks (usesocks.U):
3390 This variable conditionally defines the USE_SOCKS symbol,
3391 and indicates that Perl should be built to use SOCKS.
3393 usethreads (usethreads.U):
3394 This variable conditionally defines the USE_THREADS symbol,
3395 and indicates that Perl should be built to use threads.
3397 usevendorprefix (vendorprefix.U):
3398 This variable tells whether the vendorprefix
3399 and consequently other vendor* paths are in use.
3401 usevfork (d_vfork.U):
3402 This variable is set to true when the user accepts to use vfork.
3403 It is set to false when no vfork is available or when the user
3404 explicitely requests not to use vfork.
3407 This variable holds the path of the include files, which is
3408 usually /usr/include. It is mainly used by other Configure units.
3411 This variable is defined but not used by Configure.
3412 The value is a plain '' and is not useful.
3414 uvoformat (perlxvf.U):
3415 This variable contains the format string used for printing
3416 a Perl UV as an unsigned octal integer.
3419 This variable is the size of a UV in bytes.
3422 This variable contains the C type used for Perl's UV.
3424 uvuformat (perlxvf.U):
3425 This variable contains the format string used for printing
3426 a Perl UV as an unsigned decimal integer.
3428 uvxformat (perlxvf.U):
3429 This variable contains the format string used for printing
3430 a Perl UV as an unsigned hexadecimal integer.
3432 vendorbin (vendorbin.U):
3433 This variable contains the eventual value of the VENDORBIN symbol.
3434 It may have a ~ on the front.
3435 The standard distribution will put nothing in this directory.
3436 Vendors who distribute perl may wish to place additional
3437 binaries in this directory with
3438 MakeMaker Makefile.PL INSTALLDIRS=vendor
3439 or equivalent. See INSTALL for details.
3441 vendorbinexp (vendorbin.U):
3442 This variable is the ~name expanded version of vendorbin, so that you
3443 may use it directly in Makefiles or shell scripts.
3445 vendorlib (vendorlib.U):
3446 This variable contains the eventual value of the VENDORLIB symbol,
3447 which is the name of the private library for this package.
3448 The standard distribution will put nothing in this directory.
3449 Vendors who distribute perl may wish to place their own
3450 modules in this directory with
3451 MakeMaker Makefile.PL INSTALLDIRS=vendor
3452 or equivalent. See INSTALL for details.
3454 vendorlibexp (vendorlib.U):
3455 This variable is the ~name expanded version of vendorlib, so that you
3456 may use it directly in Makefiles or shell scripts.
3458 vendorprefix (vendorprefix.U):
3459 This variable holds the full absolute path of the directory below
3460 which the vendor will install add-on packages.
3461 See INSTALL for usage and examples.
3463 vendorprefixexp (vendorprefix.U):
3464 This variable holds the full absolute path of the directory below
3465 which the vendor will install add-on packages. Derived from vendorprefix.
3467 version (patchlevel.U):
3468 The full version number of this package, such as 5.6.1 (or 5_6_1).
3469 This combines baserev, patchlevel, and subversion to get the
3470 full version number, including any possible subversions.
3471 This is suitable for use as a directory name, and hence is
3472 filesystem dependent.
3475 This variable is defined but not used by Configure.
3476 The value is a plain '' and is not useful.
3478 voidflags (voidflags.U):
3479 This variable contains the eventual value of the VOIDFLAGS symbol,
3480 which indicates how much support of the void type is given by this
3481 compiler. See VOIDFLAGS for more info.
3484 This variable holds extra path (space-separated) used to find
3485 libraries on this platform, for example CPU-specific libraries
3486 (on multi-CPU platforms) may be listed here.
3488 xs_apiversion (xs_apiversion.U):
3489 This variable contains the version of the oldest perl binary
3490 compatible with the present perl. perl.c:incpush() and
3491 lib/lib.pm will automatically search in $sitearch for older
3492 directories across major versions back to xs_apiversion.
3493 This is only useful if you have a perl library directory tree
3494 structured like the default one.
3495 See INSTALL for how this works.
3496 The versioned site_perl directory was introduced in 5.005,
3497 so that is the lowest possible value.
3498 Since this can depend on compile time options (such as
3499 bincompat) it is set by Configure. Other non-default sources
3500 of potential incompatibility, such as multiplicity, threads,
3501 debugging, 64bits, sfio, etc., are not checked for currently,
3502 though in principle we could go snooping around in old
3506 This variable is defined but not used by Configure.
3507 The value is a plain '' and is not useful.
3510 This variable is used internally by Configure to determine the
3511 full pathname (if any) of the zip program. After Configure runs,
3512 the value is reset to a plain "zip" and is not useful.