1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double-- or a long double when applicable. Usual values are
30 2, 4 and 8. The default is eight, for safety.
32 ansi2knr (ansi2knr.U):
33 This variable is set if the user needs to run ansi2knr.
34 Currently, this is not supported, so we just abort.
36 aphostname (d_gethname.U):
37 This variable contains the command which can be used to compute the
38 host name. The command is fully qualified by its absolute path, to make
39 it safe when used by a process with super-user privileges.
41 api_revision (patchlevel.U):
42 The three variables, api_revision, api_version, and
43 api_subversion, specify the version of the oldest perl binary
44 compatible with the present perl. In a full version string
45 such as '5.6.1', api_revision is the '5'.
46 Prior to 5.5.640, the format was a floating point number,
48 perl.c:incpush() and lib/lib.pm will automatically search in
49 $sitelib/.. for older directories back to the limit specified
50 by these api_ variables. This is only useful if you have a
51 perl library directory tree structured like the default one.
52 See INSTALL for how this works. The versioned site_perl
53 directory was introduced in 5.005, so that is the lowest
54 possible value. The version list appropriate for the current
55 system is determined in inc_version_list.U.
56 XXX To do: Since compatibility can depend on compile time
57 options (such as bincompat, longlong, etc.) it should
58 (perhaps) be set by Configure, but currently it isn't.
59 Currently, we read a hard-wired value from patchlevel.h.
60 Perhaps what we ought to do is take the hard-wired value from
61 patchlevel.h but then modify it if the current Configure
62 options warrant. patchlevel.h then would use an #ifdef guard.
64 api_subversion (patchlevel.U):
65 The three variables, api_revision, api_version, and
66 api_subversion, specify the version of the oldest perl binary
67 compatible with the present perl. In a full version string
68 such as '5.6.1', api_subversion is the '1'. See api_revision for
71 api_version (patchlevel.U):
72 The three variables, api_revision, api_version, and
73 api_subversion, specify the version of the oldest perl binary
74 compatible with the present perl. In a full version string
75 such as '5.6.1', api_version is the '6'. See api_revision for
76 full details. As a special case, 5.5.0 is rendered in the
77 old-style as 5.005. (In the 5.005_0x maintenance series,
78 this was the only versioned directory in $sitelib.)
80 api_versionstring (patchlevel.U):
81 This variable combines api_revision, api_version, and
82 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
83 for use as a directory name. This is filesystem dependent.
86 This variable is used internally by Configure to determine the
87 full pathname (if any) of the ar program. After Configure runs,
88 the value is reset to a plain "ar" and is not useful.
91 This variable holds the name of the directory in which the user wants
92 to put architecture-dependent public library files for $package.
93 It is most often a local directory such as /usr/local/lib.
94 Programs using this variable must be prepared to deal
95 with filename expansion.
97 archlibexp (archlib.U):
98 This variable is the same as the archlib variable, but is
99 filename expanded at configuration time, for convenient use.
101 archname64 (use64bits.U):
102 This variable is used for the 64-bitness part of $archname.
104 archname (archname.U):
105 This variable is a short name to characterize the current
106 architecture. It is used mainly to construct the default archlib.
109 This variable defines any additional objects that must be linked
110 in with the program on this architecture. On unix, it is usually
111 empty. It is typically used to include emulations of unix calls
112 or other facilities. For perl on OS/2, for example, this would
116 This variable is used internally by Configure to determine the
117 full pathname (if any) of the awk program. After Configure runs,
118 the value is reset to a plain "awk" and is not useful.
121 The base revision level of this package, from the .package file.
124 This variable is defined but not used by Configure.
125 The value is a plain '' and is not useful.
128 This variable holds the name of the directory in which the user wants
129 to put publicly executable images for the package in question. It
130 is most often a local directory such as /usr/local/bin. Programs using
131 this variable must be prepared to deal with ~name substitution.
133 bincompat5005 (bincompat5005.U):
134 This variable contains y if this version of Perl should be
135 binary-compatible with Perl 5.005.
138 This is the same as the bin variable, but is filename expanded at
139 configuration time, for use in your makefiles.
142 This variable is defined but not used by Configure.
143 The value is a plain '' and is not useful.
146 This variable is used internally by Configure to determine the
147 full pathname (if any) of the byacc program. After Configure runs,
148 the value is reset to a plain "byacc" and is not useful.
150 byteorder (byteorder.U):
151 This variable holds the byte order. In the following, larger digits
152 indicate more significance. The variable byteorder is either 4321
153 on a big-endian machine, or 1234 on a little-endian, or 87654321
154 on a Cray ... or 3412 with weird order !
157 This variable contains the \c string if that is what causes the echo
158 command to suppress newline. Otherwise it is null. Correct usage is
159 $echo $n "prompt for a question: $c".
161 castflags (d_castneg.U):
162 This variable contains a flag that precise difficulties the
163 compiler has casting odd floating values to unsigned long:
165 1 = couldn't cast < 0
166 2 = couldn't cast >= 0x80000000
167 4 = couldn't cast in argument expression list
170 This variable is used internally by Configure to determine the
171 full pathname (if any) of the cat program. After Configure runs,
172 the value is reset to a plain "cat" and is not useful.
175 This variable holds the name of a command to execute a C compiler which
176 can resolve multiple global references that happen to have the same
177 name. Usual values are 'cc' and 'gcc'.
178 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
180 cccdlflags (dlsrc.U):
181 This variable contains any special flags that might need to be
182 passed with 'cc -c' to compile modules to be used to create a shared
183 library that will be used for dynamic loading. For hpux, this
184 should be +z. It is up to the makefile to use it.
187 This variable contains any special flags that might need to be
188 passed to cc to link with a shared library for dynamic loading.
189 It is up to the makefile to use it. For sunos 4.1, it should
193 This variable contains any additional C compiler flags desired by
194 the user. It is up to the Makefile to use this.
196 ccflags_uselargefiles (uselfs.U):
197 This variable contains the compiler flags needed by large file builds
198 and added to ccflags by hints files.
201 This can set either by hints files or by Configure. If using
202 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
203 Some platforms, however, make good use of this by storing the
204 flavor of the C compiler being used here. For example if using
205 the Sun WorkShop suite, ccname will be 'workshop'.
207 ccsymbols (Cppsym.U):
208 The variable contains the symbols defined by the C compiler alone.
209 The symbols defined by cpp or by cc when it calls cpp are not in
210 this list, see cppsymbols and cppccsymbols.
211 The list is a space-separated list of symbol=value tokens.
213 ccversion (Checkcc.U):
214 This can set either by hints files or by Configure. If using
215 a (non-gcc) vendor cc, this variable may contain a version for
219 Login name of the person who ran the Configure script and answered the
220 questions. This is used to tag both config.sh and config_h.SH.
222 cf_email (cf_email.U):
223 Electronic mail address of the person who ran Configure. This can be
224 used by units that require the user's e-mail, like MailList.U.
227 Holds the output of the "date" command when the configuration file was
228 produced. This is used to tag both config.sh and config_h.SH.
230 charsize (charsize.U):
231 This variable contains the value of the CHARSIZE symbol, which
232 indicates to the C program how many bytes there are in a character.
235 This variable is defined but not used by Configure.
236 The value is a plain '' and is not useful.
239 This variable is defined but not used by Configure.
240 The value is a plain '' and is not useful.
243 This variable is defined but not used by Configure.
244 The value is a plain '' and is not useful.
246 clocktype (d_times.U):
247 This variable holds the type returned by times(). It can be long,
248 or clock_t on BSD sites (in which case <sys/types.h> should be
252 This variable is used internally by Configure to determine the
253 full pathname (if any) of the comm program. After Configure runs,
254 the value is reset to a plain "comm" and is not useful.
257 This variable is defined but not used by Configure.
258 The value is a plain '' and is not useful.
260 CONFIGDOTSH (Oldsyms.U):
261 This is set to 'true' in config.sh so that a shell script
262 sourcing config.sh can tell if it has been sourced already.
264 contains (contains.U):
265 This variable holds the command to do a grep with a proper return
266 status. On most sane systems it is simply "grep". On insane systems
267 it is a grep followed by a cat followed by a test. This variable
268 is primarily for the use of other Configure units.
271 This variable is used internally by Configure to determine the
272 full pathname (if any) of the cp program. After Configure runs,
273 the value is reset to a plain "cp" and is not useful.
276 This variable is defined but not used by Configure.
277 The value is a plain '' and is not useful.
280 This variable is used internally by Configure to determine the
281 full pathname (if any) of the cpp program. After Configure runs,
282 the value is reset to a plain "cpp" and is not useful.
284 cpp_stuff (cpp_stuff.U):
285 This variable contains an identification of the catenation mechanism
286 used by the C preprocessor.
288 cppccsymbols (Cppsym.U):
289 The variable contains the symbols defined by the C compiler
290 when it calls cpp. The symbols defined by the cc alone or cpp
291 alone are not in this list, see ccsymbols and cppsymbols.
292 The list is a space-separated list of symbol=value tokens.
294 cppflags (ccflags.U):
295 This variable holds the flags that will be passed to the C pre-
296 processor. It is up to the Makefile to use it.
298 cpplast (cppstdin.U):
299 This variable has the same functionality as cppminus, only it applies
300 to cpprun and not cppstdin.
302 cppminus (cppstdin.U):
303 This variable contains the second part of the string which will invoke
304 the C preprocessor on the standard input and produce to standard
305 output. This variable will have the value "-" if cppstdin needs
306 a minus to specify standard input, otherwise the value is "".
309 This variable contains the command which will invoke a C preprocessor
310 on standard input and put the output to stdout. It is guaranteed not
311 to be a wrapper and may be a null string if no preprocessor can be
312 made directly available. This preprocessor might be different from the
313 one used by the C compiler. Don't forget to append cpplast after the
314 preprocessor options.
316 cppstdin (cppstdin.U):
317 This variable contains the command which will invoke the C
318 preprocessor on standard input and put the output to stdout.
319 It is primarily used by other Configure units that ask about
320 preprocessor symbols.
322 cppsymbols (Cppsym.U):
323 The variable contains the symbols defined by the C preprocessor
324 alone. The symbols defined by cc or by cc when it calls cpp are
325 not in this list, see ccsymbols and cppccsymbols.
326 The list is a space-separated list of symbol=value tokens.
328 crosscompile (crosscompile.U):
329 This variable conditionally defines the CROSSCOMPILE symbol
330 which signifies that the build process is be a cross-compilation.
331 This is normally set by hints files or from Configure command line.
333 cryptlib (d_crypt.U):
334 This variable holds -lcrypt or the path to a libcrypt.a archive if
335 the crypt() function is not defined in the standard C library. It is
336 up to the Makefile to use this.
339 This variable is used internally by Configure to determine the
340 full pathname (if any) of the csh program. After Configure runs,
341 the value is reset to a plain "csh" and is not useful.
343 d__fwalk (d__fwalk.U):
344 This variable conditionally defines HAS__FWALK if _fwalk() is
345 available to apply a function to all the file handles.
347 d_access (d_access.U):
348 This variable conditionally defines HAS_ACCESS if the access() system
349 call is available to check for access permissions using real IDs.
351 d_accessx (d_accessx.U):
352 This variable conditionally defines the HAS_ACCESSX symbol, which
353 indicates to the C program that the accessx() routine is available.
356 This variable conditionally defines the HAS_ALARM symbol, which
357 indicates to the C program that the alarm() routine is available.
359 d_archlib (archlib.U):
360 This variable conditionally defines ARCHLIB to hold the pathname
361 of architecture-dependent library files for $package. If
362 $archlib is the same as $privlib, then this is set to undef.
365 This variable conditionally defines the HAS_ATOLF symbol, which
366 indicates to the C program that the atolf() routine is available.
369 This variable conditionally defines the HAS_ATOLL symbol, which
370 indicates to the C program that the atoll() routine is available.
372 d_attribut (d_attribut.U):
373 This variable conditionally defines HASATTRIBUTE, which
374 indicates the C compiler can check for function attributes,
375 such as printf formats.
378 This variable conditionally defines the HAS_BCMP symbol if
379 the bcmp() routine is available to compare strings.
382 This variable conditionally defines the HAS_BCOPY symbol if
383 the bcopy() routine is available to copy strings.
385 d_bincompat5005 (bincompat5005.U):
386 This variable conditionally defines BINCOMPAT5005 so that embed.h
387 can take special action if this version of Perl should be
388 binary-compatible with Perl 5.005. This is impossible for builds
389 that use features like threads and multiplicity it is always $undef
393 This symbol conditionally defines the symbol BSD when running on a
396 d_bsdgetpgrp (d_getpgrp.U):
397 This variable conditionally defines USE_BSD_GETPGRP if
398 getpgrp needs one arguments whereas USG one needs none.
400 d_bsdsetpgrp (d_setpgrp.U):
401 This variable conditionally defines USE_BSD_SETPGRP if
402 setpgrp needs two arguments whereas USG one needs none.
403 See also d_setpgid for a POSIX interface.
406 This variable conditionally defines the HAS_BZERO symbol if
407 the bzero() routine is available to set memory to 0.
409 d_casti32 (d_casti32.U):
410 This variable conditionally defines CASTI32, which indicates
411 whether the C compiler can cast large floats to 32-bit ints.
413 d_castneg (d_castneg.U):
414 This variable conditionally defines CASTNEG, which indicates
415 wether the C compiler can cast negative float to unsigned.
417 d_charvspr (d_vprintf.U):
418 This variable conditionally defines CHARVSPRINTF if this system
419 has vsprintf returning type (char*). The trend seems to be to
420 declare it as "int vsprintf()".
423 This variable conditionally defines the HAS_CHOWN symbol, which
424 indicates to the C program that the chown() routine is available.
426 d_chroot (d_chroot.U):
427 This variable conditionally defines the HAS_CHROOT symbol, which
428 indicates to the C program that the chroot() routine is available.
430 d_chsize (d_chsize.U):
431 This variable conditionally defines the CHSIZE symbol, which
432 indicates to the C program that the chsize() routine is available
433 to truncate files. You might need a -lx to get this routine.
435 d_closedir (d_closedir.U):
436 This variable conditionally defines HAS_CLOSEDIR if closedir() is
440 This variable conditionally defines the HASCONST symbol, which
441 indicates to the C program that this C compiler knows about the
445 This variable conditionally defines the CRYPT symbol, which
446 indicates to the C program that the crypt() routine is available
447 to encrypt passwords and the like.
450 This variable conditionally defines the CSH symbol, which
451 indicates to the C program that the C-shell exists.
453 d_cuserid (d_cuserid.U):
454 This variable conditionally defines the HAS_CUSERID symbol, which
455 indicates to the C program that the cuserid() routine is available
456 to get character login names.
458 d_dbl_dig (d_dbl_dig.U):
459 This variable conditionally defines d_dbl_dig if this system's
460 header files provide DBL_DIG, which is the number of significant
461 digits in a double precision number.
463 d_difftime (d_difftime.U):
464 This variable conditionally defines the HAS_DIFFTIME symbol, which
465 indicates to the C program that the difftime() routine is available.
467 d_dirnamlen (i_dirent.U):
468 This variable conditionally defines DIRNAMLEN, which indicates
469 to the C program that the length of directory entry names is
470 provided by a d_namelen field.
472 d_dlerror (d_dlerror.U):
473 This variable conditionally defines the HAS_DLERROR symbol, which
474 indicates to the C program that the dlerror() routine is available.
476 d_dlopen (d_dlopen.U):
477 This variable conditionally defines the HAS_DLOPEN symbol, which
478 indicates to the C program that the dlopen() routine is available.
480 d_dlsymun (d_dlsymun.U):
481 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
482 indicates that we need to prepend an underscore to the symbol
483 name before calling dlsym().
485 d_dosuid (d_dosuid.U):
486 This variable conditionally defines the symbol DOSUID, which
487 tells the C program that it should insert setuid emulation code
488 on hosts which have setuid #! scripts disabled.
490 d_drand48proto (d_drand48proto.U):
491 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
492 which indicates to the C program that the system provides
493 a prototype for the drand48() function. Otherwise, it is
494 up to the program to supply one.
497 This variable conditionally defines HAS_DUP2 if dup2() is
498 available to duplicate file descriptors.
500 d_eaccess (d_eaccess.U):
501 This variable conditionally defines the HAS_EACCESS symbol, which
502 indicates to the C program that the eaccess() routine is available.
504 d_endgrent (d_endgrent.U):
505 This variable conditionally defines the HAS_ENDGRENT symbol, which
506 indicates to the C program that the endgrent() routine is available
507 for sequential access of the group database.
509 d_endhent (d_endhent.U):
510 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
511 available to close whatever was being used for host queries.
513 d_endnent (d_endnent.U):
514 This variable conditionally defines HAS_ENDNETENT if endnetent() is
515 available to close whatever was being used for network queries.
517 d_endpent (d_endpent.U):
518 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
519 available to close whatever was being used for protocol queries.
521 d_endpwent (d_endpwent.U):
522 This variable conditionally defines the HAS_ENDPWENT symbol, which
523 indicates to the C program that the endpwent() routine is available
524 for sequential access of the passwd database.
526 d_endsent (d_endsent.U):
527 This variable conditionally defines HAS_ENDSERVENT if endservent() is
528 available to close whatever was being used for service queries.
530 d_eofnblk (nblock_io.U):
531 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
532 when reading from a non-blocking I/O source.
535 This variable conditionally defines the symbols EUNICE and VAX, which
536 alerts the C program that it must deal with ideosyncracies of VMS.
538 d_fchmod (d_fchmod.U):
539 This variable conditionally defines the HAS_FCHMOD symbol, which
540 indicates to the C program that the fchmod() routine is available
541 to change mode of opened files.
543 d_fchown (d_fchown.U):
544 This variable conditionally defines the HAS_FCHOWN symbol, which
545 indicates to the C program that the fchown() routine is available
546 to change ownership of opened files.
549 This variable conditionally defines the HAS_FCNTL symbol, and indicates
550 whether the fcntl() function exists
552 d_fcntl_can_lock (d_fcntl_can_lock.U):
553 This variable conditionally defines the FCNTL_CAN_LOCK symbol
554 and indicates whether file locking with fcntl() works.
556 d_fd_macros (d_fd_set.U):
557 This variable contains the eventual value of the HAS_FD_MACROS symbol,
558 which indicates if your C compiler knows about the macros which
559 manipulate an fd_set.
561 d_fd_set (d_fd_set.U):
562 This variable contains the eventual value of the HAS_FD_SET symbol,
563 which indicates if your C compiler knows about the fd_set typedef.
565 d_fds_bits (d_fd_set.U):
566 This variable contains the eventual value of the HAS_FDS_BITS symbol,
567 which indicates if your fd_set typedef contains the fds_bits member.
568 If you have an fd_set typedef, but the dweebs who installed it did
569 a half-fast job and neglected to provide the macros to manipulate
570 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
572 d_fgetpos (d_fgetpos.U):
573 This variable conditionally defines HAS_FGETPOS if fgetpos() is
574 available to get the file position indicator.
576 d_flexfnam (d_flexfnam.U):
577 This variable conditionally defines the FLEXFILENAMES symbol, which
578 indicates that the system supports filenames longer than 14 characters.
581 This variable conditionally defines HAS_FLOCK if flock() is
582 available to do file locking.
585 This variable conditionally defines the HAS_FORK symbol, which
586 indicates to the C program that the fork() routine is available.
588 d_fpathconf (d_pathconf.U):
589 This variable conditionally defines the HAS_FPATHCONF symbol, which
590 indicates to the C program that the pathconf() routine is available
591 to determine file-system related limits and options associated
592 with a given open file descriptor.
594 d_fpos64_t (d_fpos64_t.U):
595 This symbol will be defined if the C compiler supports fpos64_t.
597 d_frexpl (d_frexpl.U):
598 This variable conditionally defines the HAS_FREXPL symbol, which
599 indicates to the C program that the frexpl() routine is available.
601 d_fs_data_s (d_fs_data_s.U):
602 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
603 which indicates that the struct fs_data is supported.
605 d_fseeko (d_fseeko.U):
606 This variable conditionally defines the HAS_FSEEKO symbol, which
607 indicates to the C program that the fseeko() routine is available.
609 d_fsetpos (d_fsetpos.U):
610 This variable conditionally defines HAS_FSETPOS if fsetpos() is
611 available to set the file position indicator.
613 d_fstatfs (d_fstatfs.U):
614 This variable conditionally defines the HAS_FSTATFS symbol, which
615 indicates to the C program that the fstatfs() routine is available.
617 d_fstatvfs (d_statvfs.U):
618 This variable conditionally defines the HAS_FSTATVFS symbol, which
619 indicates to the C program that the fstatvfs() routine is available.
622 This variable conditionally defines the HAS_FSYNC symbol, which
623 indicates to the C program that the fsync() routine is available.
625 d_ftello (d_ftello.U):
626 This variable conditionally defines the HAS_FTELLO symbol, which
627 indicates to the C program that the ftello() routine is available.
630 This variable conditionally defines the HAS_FTIME symbol, which indicates
631 that the ftime() routine exists. The ftime() routine is basically
632 a sub-second accuracy clock.
634 d_Gconvert (d_gconvert.U):
635 This variable holds what Gconvert is defined as to convert
636 floating point numbers into strings. It could be 'gconvert'
637 or a more complex macro emulating gconvert with gcvt() or sprintf.
639 d_Gconvert='gconvert((x),(n),(t),(b))'
640 d_Gconvert='gcvt((x),(n),(b))'
641 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
643 d_getcwd (d_getcwd.U):
644 This variable conditionally defines the HAS_GETCWD symbol, which
645 indicates to the C program that the getcwd() routine is available
646 to get the current working directory.
648 d_getespwnam (d_getespwnam.U):
649 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
650 available to retrieve enchanced (shadow) password entries by name.
652 d_getfsstat (d_getfsstat.U):
653 This variable conditionally defines the HAS_GETFSSTAT symbol, which
654 indicates to the C program that the getfsstat() routine is available.
656 d_getgrent (d_getgrent.U):
657 This variable conditionally defines the HAS_GETGRENT symbol, which
658 indicates to the C program that the getgrent() routine is available
659 for sequential access of the group database.
661 d_getgrps (d_getgrps.U):
662 This variable conditionally defines the HAS_GETGROUPS symbol, which
663 indicates to the C program that the getgroups() routine is available
664 to get the list of process groups.
666 d_gethbyaddr (d_gethbyad.U):
667 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
668 indicates to the C program that the gethostbyaddr() routine is available
669 to look up hosts by their IP addresses.
671 d_gethbyname (d_gethbynm.U):
672 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
673 indicates to the C program that the gethostbyname() routine is available
674 to look up host names in some data base or other.
676 d_gethent (d_gethent.U):
677 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
678 available to look up host names in some data base or another.
680 d_gethname (d_gethname.U):
681 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
682 indicates to the C program that the gethostname() routine may be
683 used to derive the host name.
685 d_gethostprotos (d_gethostprotos.U):
686 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
687 which indicates to the C program that <netdb.h> supplies
688 prototypes for the various gethost*() functions.
689 See also netdbtype.U for probing for various netdb types.
691 d_getlogin (d_getlogin.U):
692 This variable conditionally defines the HAS_GETLOGIN symbol, which
693 indicates to the C program that the getlogin() routine is available
694 to get the login name.
696 d_getmnt (d_getmnt.U):
697 This variable conditionally defines the HAS_GETMNT symbol, which
698 indicates to the C program that the getmnt() routine is available
699 to retrieve one or more mount info blocks by filename.
701 d_getmntent (d_getmntent.U):
702 This variable conditionally defines the HAS_GETMNTENT symbol, which
703 indicates to the C program that the getmntent() routine is available
704 to iterate through mounted files to get their mount info.
706 d_getnbyaddr (d_getnbyad.U):
707 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
708 indicates to the C program that the getnetbyaddr() routine is available
709 to look up networks by their IP addresses.
711 d_getnbyname (d_getnbynm.U):
712 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
713 indicates to the C program that the getnetbyname() routine is available
714 to look up networks by their names.
716 d_getnent (d_getnent.U):
717 This variable conditionally defines HAS_GETNETENT if getnetent() is
718 available to look up network names in some data base or another.
720 d_getnetprotos (d_getnetprotos.U):
721 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
722 which indicates to the C program that <netdb.h> supplies
723 prototypes for the various getnet*() functions.
724 See also netdbtype.U for probing for various netdb types.
726 d_getpagsz (d_getpagsz.U):
727 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
728 is available to get the system page size.
730 d_getpbyname (d_getprotby.U):
731 This variable conditionally defines the HAS_GETPROTOBYNAME
732 symbol, which indicates to the C program that the
733 getprotobyname() routine is available to look up protocols
736 d_getpbynumber (d_getprotby.U):
737 This variable conditionally defines the HAS_GETPROTOBYNUMBER
738 symbol, which indicates to the C program that the
739 getprotobynumber() routine is available to look up protocols
742 d_getpent (d_getpent.U):
743 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
744 available to look up protocols in some data base or another.
746 d_getpgid (d_getpgid.U):
747 This variable conditionally defines the HAS_GETPGID symbol, which
748 indicates to the C program that the getpgid(pid) function
749 is available to get the process group id.
751 d_getpgrp2 (d_getpgrp2.U):
752 This variable conditionally defines the HAS_GETPGRP2 symbol, which
753 indicates to the C program that the getpgrp2() (as in DG/UX) routine
754 is available to get the current process group.
756 d_getpgrp (d_getpgrp.U):
757 This variable conditionally defines HAS_GETPGRP if getpgrp() is
758 available to get the current process group.
760 d_getppid (d_getppid.U):
761 This variable conditionally defines the HAS_GETPPID symbol, which
762 indicates to the C program that the getppid() routine is available
763 to get the parent process ID.
765 d_getprior (d_getprior.U):
766 This variable conditionally defines HAS_GETPRIORITY if getpriority()
767 is available to get a process's priority.
769 d_getprotoprotos (d_getprotoprotos.U):
770 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
771 which indicates to the C program that <netdb.h> supplies
772 prototypes for the various getproto*() functions.
773 See also netdbtype.U for probing for various netdb types.
775 d_getprpwnam (d_getprpwnam.U):
776 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
777 available to retrieve protected (shadow) password entries by name.
779 d_getpwent (d_getpwent.U):
780 This variable conditionally defines the HAS_GETPWENT symbol, which
781 indicates to the C program that the getpwent() routine is available
782 for sequential access of the passwd database.
784 d_getsbyname (d_getsrvby.U):
785 This variable conditionally defines the HAS_GETSERVBYNAME
786 symbol, which indicates to the C program that the
787 getservbyname() routine is available to look up services
790 d_getsbyport (d_getsrvby.U):
791 This variable conditionally defines the HAS_GETSERVBYPORT
792 symbol, which indicates to the C program that the
793 getservbyport() routine is available to look up services
796 d_getsent (d_getsent.U):
797 This variable conditionally defines HAS_GETSERVENT if getservent() is
798 available to look up network services in some data base or another.
800 d_getservprotos (d_getservprotos.U):
801 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
802 which indicates to the C program that <netdb.h> supplies
803 prototypes for the various getserv*() functions.
804 See also netdbtype.U for probing for various netdb types.
806 d_getspnam (d_getspnam.U):
807 This variable conditionally defines HAS_GETSPNAM if getspnam() is
808 available to retrieve SysV shadow password entries by name.
810 d_gettimeod (d_ftime.U):
811 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
812 indicates that the gettimeofday() system call exists (to obtain a
813 sub-second accuracy clock). You should probably include <sys/resource.h>.
815 d_gnulibc (d_gnulibc.U):
816 Defined if we're dealing with the GNU C Library.
818 d_grpasswd (i_grp.U):
819 This variable conditionally defines GRPASSWD, which indicates
820 that struct group in <grp.h> contains gr_passwd.
822 d_hasmntopt (d_hasmntopt.U):
823 This variable conditionally defines the HAS_HASMNTOPT symbol, which
824 indicates to the C program that the hasmntopt() routine is available
825 to query the mount options of file systems.
828 This variable conditionally defines HAS_HTONL if htonl() and its
829 friends are available to do network order byte swapping.
832 This variable conditionally defines the HAS_ICONV symbol, which
833 indicates to the C program that the iconv() routine is available.
835 d_index (d_strchr.U):
836 This variable conditionally defines HAS_INDEX if index() and
837 rindex() are available for string searching.
839 d_inetaton (d_inetaton.U):
840 This variable conditionally defines the HAS_INET_ATON symbol, which
841 indicates to the C program that the inet_aton() function is available
842 to parse IP address "dotted-quad" strings.
844 d_int64_t (d_int64_t.U):
845 This symbol will be defined if the C compiler supports int64_t.
847 d_isascii (d_isascii.U):
848 This variable conditionally defines the HAS_ISASCII constant,
849 which indicates to the C program that isascii() is available.
852 This variable conditionally defines the HAS_ISNAN symbol, which
853 indicates to the C program that the isnan() routine is available.
855 d_isnanl (d_isnanl.U):
856 This variable conditionally defines the HAS_ISNANL symbol, which
857 indicates to the C program that the isnanl() routine is available.
859 d_killpg (d_killpg.U):
860 This variable conditionally defines the HAS_KILLPG symbol, which
861 indicates to the C program that the killpg() routine is available
862 to kill process groups.
864 d_lchown (d_lchown.U):
865 This variable conditionally defines the HAS_LCHOWN symbol, which
866 indicates to the C program that the lchown() routine is available
867 to operate on a symbolic link (instead of following the link).
869 d_ldbl_dig (d_ldbl_dig.U):
870 This variable conditionally defines d_ldbl_dig if this system's
871 header files provide LDBL_DIG, which is the number of significant
872 digits in a long double precision number.
875 This variable conditionally defines HAS_LINK if link() is
876 available to create hard links.
878 d_locconv (d_locconv.U):
879 This variable conditionally defines HAS_LOCALECONV if localeconv() is
880 available for numeric and monetary formatting conventions.
883 This variable conditionally defines HAS_LOCKF if lockf() is
884 available to do file locking.
886 d_longdbl (d_longdbl.U):
887 This variable conditionally defines HAS_LONG_DOUBLE if
888 the long double type is supported.
890 d_longlong (d_longlong.U):
891 This variable conditionally defines HAS_LONG_LONG if
892 the long long type is supported.
894 d_lseekproto (d_lseekproto.U):
895 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
896 which indicates to the C program that the system provides
897 a prototype for the lseek() function. Otherwise, it is
898 up to the program to supply one.
901 This variable conditionally defines HAS_LSTAT if lstat() is
902 available to do file stats on symbolic links.
904 d_madvise (d_madvise.U):
905 This variable conditionally defines HAS_MADVISE if madvise() is
906 available to map a file into memory.
909 This variable conditionally defines the HAS_MBLEN symbol, which
910 indicates to the C program that the mblen() routine is available
911 to find the number of bytes in a multibye character.
913 d_mbstowcs (d_mbstowcs.U):
914 This variable conditionally defines the HAS_MBSTOWCS symbol, which
915 indicates to the C program that the mbstowcs() routine is available
916 to convert a multibyte string into a wide character string.
918 d_mbtowc (d_mbtowc.U):
919 This variable conditionally defines the HAS_MBTOWC symbol, which
920 indicates to the C program that the mbtowc() routine is available
921 to convert multibyte to a wide character.
923 d_memchr (d_memchr.U):
924 This variable conditionally defines the HAS_MEMCHR symbol, which
925 indicates to the C program that the memchr() routine is available
926 to locate characters within a C string.
928 d_memcmp (d_memcmp.U):
929 This variable conditionally defines the HAS_MEMCMP symbol, which
930 indicates to the C program that the memcmp() routine is available
931 to compare blocks of memory.
933 d_memcpy (d_memcpy.U):
934 This variable conditionally defines the HAS_MEMCPY symbol, which
935 indicates to the C program that the memcpy() routine is available
936 to copy blocks of memory.
938 d_memmove (d_memmove.U):
939 This variable conditionally defines the HAS_MEMMOVE symbol, which
940 indicates to the C program that the memmove() routine is available
941 to copy potentatially overlapping blocks of memory.
943 d_memset (d_memset.U):
944 This variable conditionally defines the HAS_MEMSET symbol, which
945 indicates to the C program that the memset() routine is available
946 to set blocks of memory.
949 This variable conditionally defines the HAS_MKDIR symbol, which
950 indicates to the C program that the mkdir() routine is available
951 to create directories..
953 d_mkdtemp (d_mkdtemp.U):
954 This variable conditionally defines the HAS_MKDTEMP symbol, which
955 indicates to the C program that the mkdtemp() routine is available
956 to exclusively create a uniquely named temporary directory.
958 d_mkfifo (d_mkfifo.U):
959 This variable conditionally defines the HAS_MKFIFO symbol, which
960 indicates to the C program that the mkfifo() routine is available.
962 d_mkstemp (d_mkstemp.U):
963 This variable conditionally defines the HAS_MKSTEMP symbol, which
964 indicates to the C program that the mkstemp() routine is available
965 to exclusively create and open a uniquely named temporary file.
967 d_mkstemps (d_mkstemps.U):
968 This variable conditionally defines the HAS_MKSTEMPS symbol, which
969 indicates to the C program that the mkstemps() routine is available
970 to exclusively create and open a uniquely named (with a suffix)
973 d_mktime (d_mktime.U):
974 This variable conditionally defines the HAS_MKTIME symbol, which
975 indicates to the C program that the mktime() routine is available.
978 This variable conditionally defines HAS_MMAP if mmap() is
979 available to map a file into memory.
982 This variable conditionally defines the HAS_MODFL symbol, which
983 indicates to the C program that the modfl() routine is available.
985 d_mprotect (d_mprotect.U):
986 This variable conditionally defines HAS_MPROTECT if mprotect() is
987 available to modify the access protection of a memory mapped file.
990 This variable conditionally defines the HAS_MSG symbol, which
991 indicates that the entire msg*(2) library is present.
993 d_msg_ctrunc (d_socket.U):
994 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
995 which indicates that the MSG_CTRUNC is available. #ifdef is
996 not enough because it may be an enum, glibc has been known to do this.
998 d_msg_dontroute (d_socket.U):
999 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1000 which indicates that the MSG_DONTROUTE is available. #ifdef is
1001 not enough because it may be an enum, glibc has been known to do this.
1003 d_msg_oob (d_socket.U):
1004 This variable conditionally defines the HAS_MSG_OOB symbol,
1005 which indicates that the MSG_OOB is available. #ifdef is
1006 not enough because it may be an enum, glibc has been known to do this.
1008 d_msg_peek (d_socket.U):
1009 This variable conditionally defines the HAS_MSG_PEEK symbol,
1010 which indicates that the MSG_PEEK is available. #ifdef is
1011 not enough because it may be an enum, glibc has been known to do this.
1013 d_msg_proxy (d_socket.U):
1014 This variable conditionally defines the HAS_MSG_PROXY symbol,
1015 which indicates that the MSG_PROXY is available. #ifdef is
1016 not enough because it may be an enum, glibc has been known to do this.
1018 d_msgctl (d_msgctl.U):
1019 This variable conditionally defines the HAS_MSGCTL symbol, which
1020 indicates to the C program that the msgctl() routine is available.
1022 d_msgget (d_msgget.U):
1023 This variable conditionally defines the HAS_MSGGET symbol, which
1024 indicates to the C program that the msgget() routine is available.
1026 d_msgrcv (d_msgrcv.U):
1027 This variable conditionally defines the HAS_MSGRCV symbol, which
1028 indicates to the C program that the msgrcv() routine is available.
1030 d_msgsnd (d_msgsnd.U):
1031 This variable conditionally defines the HAS_MSGSND symbol, which
1032 indicates to the C program that the msgsnd() routine is available.
1034 d_msync (d_msync.U):
1035 This variable conditionally defines HAS_MSYNC if msync() is
1036 available to synchronize a mapped file.
1038 d_munmap (d_munmap.U):
1039 This variable conditionally defines HAS_MUNMAP if munmap() is
1040 available to unmap a region mapped by mmap().
1042 d_mymalloc (mallocsrc.U):
1043 This variable conditionally defines MYMALLOC in case other parts
1044 of the source want to take special action if MYMALLOC is used.
1045 This may include different sorts of profiling or error detection.
1048 This variable conditionally defines the HAS_NICE symbol, which
1049 indicates to the C program that the nice() routine is available.
1051 d_nv_preserves_uv (perlxv.U):
1052 This variable indicates whether a variable of type nvtype
1053 can preserve all the bits a variable of type uvtype.
1055 d_nv_preserves_uv_bits (perlxv.U):
1056 This variable indicates how many of bits type uvtype
1057 a variable nvtype can preserve.
1059 d_off64_t (d_off64_t.U):
1060 This symbol will be defined if the C compiler supports off64_t.
1062 d_old_pthread_create_joinable (d_pthrattrj.U):
1063 This variable conditionally defines pthread_create_joinable.
1064 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1066 d_oldpthreads (usethreads.U):
1067 This variable conditionally defines the OLD_PTHREADS_API symbol,
1068 and indicates that Perl should be built to use the old
1069 draft POSIX threads API. This is only potentially meaningful if
1072 d_oldsock (d_socket.U):
1073 This variable conditionally defines the OLDSOCKET symbol, which
1074 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1076 d_open3 (d_open3.U):
1077 This variable conditionally defines the HAS_OPEN3 manifest constant,
1078 which indicates to the C program that the 3 argument version of
1079 the open(2) function is available.
1081 d_pathconf (d_pathconf.U):
1082 This variable conditionally defines the HAS_PATHCONF symbol, which
1083 indicates to the C program that the pathconf() routine is available
1084 to determine file-system related limits and options associated
1085 with a given filename.
1087 d_pause (d_pause.U):
1088 This variable conditionally defines the HAS_PAUSE symbol, which
1089 indicates to the C program that the pause() routine is available
1090 to suspend a process until a signal is received.
1092 d_perl_otherlibdirs (otherlibdirs.U):
1093 This variable conditionally defines PERL_OTHERLIBDIRS, which
1094 contains a colon-separated set of paths for the perl binary to
1095 include in @INC. See also otherlibdirs.
1097 d_phostname (d_gethname.U):
1098 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1099 contains the shell command which, when fed to popen(), may be
1100 used to derive the host name.
1103 This variable conditionally defines the HAS_PIPE symbol, which
1104 indicates to the C program that the pipe() routine is available
1105 to create an inter-process channel.
1108 This variable conditionally defines the HAS_POLL symbol, which
1109 indicates to the C program that the poll() routine is available
1110 to poll active file descriptors.
1112 d_portable (d_portable.U):
1113 This variable conditionally defines the PORTABLE symbol, which
1114 indicates to the C program that it should not assume that it is
1115 running on the machine it was compiled on.
1117 d_PRId64 (quadfio.U):
1118 This variable conditionally defines the PERL_PRId64 symbol, which
1119 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1121 d_PRIeldbl (longdblfio.U):
1122 This variable conditionally defines the PERL_PRIfldbl symbol, which
1123 indiciates that stdio has a symbol to print long doubles.
1125 d_PRIEUldbl (longdblfio.U):
1126 This variable conditionally defines the PERL_PRIfldbl symbol, which
1127 indiciates that stdio has a symbol to print long doubles.
1128 The 'U' in the name is to separate this from d_PRIeldbl so that even
1129 case-blind systems can see the difference.
1131 d_PRIfldbl (longdblfio.U):
1132 This variable conditionally defines the PERL_PRIfldbl symbol, which
1133 indiciates that stdio has a symbol to print long doubles.
1135 d_PRIFUldbl (longdblfio.U):
1136 This variable conditionally defines the PERL_PRIfldbl symbol, which
1137 indiciates that stdio has a symbol to print long doubles.
1138 The 'U' in the name is to separate this from d_PRIfldbl so that even
1139 case-blind systems can see the difference.
1141 d_PRIgldbl (longdblfio.U):
1142 This variable conditionally defines the PERL_PRIfldbl symbol, which
1143 indiciates that stdio has a symbol to print long doubles.
1145 d_PRIGUldbl (longdblfio.U):
1146 This variable conditionally defines the PERL_PRIfldbl symbol, which
1147 indiciates that stdio has a symbol to print long doubles.
1148 The 'U' in the name is to separate this from d_PRIgldbl so that even
1149 case-blind systems can see the difference.
1151 d_PRIi64 (quadfio.U):
1152 This variable conditionally defines the PERL_PRIi64 symbol, which
1153 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1155 d_PRIo64 (quadfio.U):
1156 This variable conditionally defines the PERL_PRIo64 symbol, which
1157 indiciates that stdio has a symbol to print 64-bit octal numbers.
1159 d_PRIu64 (quadfio.U):
1160 This variable conditionally defines the PERL_PRIu64 symbol, which
1161 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1164 d_PRIx64 (quadfio.U):
1165 This variable conditionally defines the PERL_PRIx64 symbol, which
1166 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1168 d_PRIXU64 (quadfio.U):
1169 This variable conditionally defines the PERL_PRIXU64 symbol, which
1170 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1171 The 'U' in the name is to separate this from d_PRIx64 so that even
1172 case-blind systems can see the difference.
1174 d_pthread_yield (d_pthread_y.U):
1175 This variable conditionally defines the HAS_PTHREAD_YIELD
1176 symbol if the pthread_yield routine is available to yield
1177 the execution of the current thread.
1180 This variable conditionally defines PWAGE, which indicates
1181 that struct passwd contains pw_age.
1183 d_pwchange (i_pwd.U):
1184 This variable conditionally defines PWCHANGE, which indicates
1185 that struct passwd contains pw_change.
1187 d_pwclass (i_pwd.U):
1188 This variable conditionally defines PWCLASS, which indicates
1189 that struct passwd contains pw_class.
1191 d_pwcomment (i_pwd.U):
1192 This variable conditionally defines PWCOMMENT, which indicates
1193 that struct passwd contains pw_comment.
1195 d_pwexpire (i_pwd.U):
1196 This variable conditionally defines PWEXPIRE, which indicates
1197 that struct passwd contains pw_expire.
1199 d_pwgecos (i_pwd.U):
1200 This variable conditionally defines PWGECOS, which indicates
1201 that struct passwd contains pw_gecos.
1203 d_pwpasswd (i_pwd.U):
1204 This variable conditionally defines PWPASSWD, which indicates
1205 that struct passwd contains pw_passwd.
1207 d_pwquota (i_pwd.U):
1208 This variable conditionally defines PWQUOTA, which indicates
1209 that struct passwd contains pw_quota.
1211 d_qgcvt (d_qgcvt.U):
1212 This variable conditionally defines the HAS_QGCVT symbol, which
1213 indicates to the C program that the qgcvt() routine is available.
1215 d_quad (quadtype.U):
1216 This variable, if defined, tells that there's a 64-bit integer type,
1219 d_readdir (d_readdir.U):
1220 This variable conditionally defines HAS_READDIR if readdir() is
1221 available to read directory entries.
1223 d_readlink (d_readlink.U):
1224 This variable conditionally defines the HAS_READLINK symbol, which
1225 indicates to the C program that the readlink() routine is available
1226 to read the value of a symbolic link.
1228 d_rename (d_rename.U):
1229 This variable conditionally defines the HAS_RENAME symbol, which
1230 indicates to the C program that the rename() routine is available
1233 d_rewinddir (d_readdir.U):
1234 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1237 d_rmdir (d_rmdir.U):
1238 This variable conditionally defines HAS_RMDIR if rmdir() is
1239 available to remove directories.
1241 d_safebcpy (d_safebcpy.U):
1242 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1243 the bcopy() routine can do overlapping copies.
1245 d_safemcpy (d_safemcpy.U):
1246 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1247 the memcpy() routine can do overlapping copies.
1249 d_sanemcmp (d_sanemcmp.U):
1250 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1251 the memcpy() routine is available and can be used to compare relative
1252 magnitudes of chars with their high bits set.
1254 d_sbrkproto (d_sbrkproto.U):
1255 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1256 which indicates to the C program that the system provides
1257 a prototype for the sbrk() function. Otherwise, it is
1258 up to the program to supply one.
1260 d_sched_yield (d_pthread_y.U):
1261 This variable conditionally defines the HAS_SCHED_YIELD
1262 symbol if the sched_yield routine is available to yield
1263 the execution of the current thread.
1265 d_scm_rights (d_socket.U):
1266 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1267 which indicates that the SCM_RIGHTS is available. #ifdef is
1268 not enough because it may be an enum, glibc has been known to do this.
1270 d_SCNfldbl (longdblfio.U):
1271 This variable conditionally defines the PERL_PRIfldbl symbol, which
1272 indiciates that stdio has a symbol to scan long doubles.
1274 d_seekdir (d_readdir.U):
1275 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1278 d_select (d_select.U):
1279 This variable conditionally defines HAS_SELECT if select() is
1280 available to select active file descriptors. A <sys/time.h>
1281 inclusion may be necessary for the timeout field.
1284 This variable conditionally defines the HAS_SEM symbol, which
1285 indicates that the entire sem*(2) library is present.
1287 d_semctl (d_semctl.U):
1288 This variable conditionally defines the HAS_SEMCTL symbol, which
1289 indicates to the C program that the semctl() routine is available.
1291 d_semctl_semid_ds (d_union_semun.U):
1292 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1293 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1295 d_semctl_semun (d_union_semun.U):
1296 This variable conditionally defines USE_SEMCTL_SEMUN, which
1297 indicates that union semun is to be used for semctl IPC_STAT.
1299 d_semget (d_semget.U):
1300 This variable conditionally defines the HAS_SEMGET symbol, which
1301 indicates to the C program that the semget() routine is available.
1303 d_semop (d_semop.U):
1304 This variable conditionally defines the HAS_SEMOP symbol, which
1305 indicates to the C program that the semop() routine is available.
1307 d_setegid (d_setegid.U):
1308 This variable conditionally defines the HAS_SETEGID symbol, which
1309 indicates to the C program that the setegid() routine is available
1310 to change the effective gid of the current program.
1312 d_seteuid (d_seteuid.U):
1313 This variable conditionally defines the HAS_SETEUID symbol, which
1314 indicates to the C program that the seteuid() routine is available
1315 to change the effective uid of the current program.
1317 d_setgrent (d_setgrent.U):
1318 This variable conditionally defines the HAS_SETGRENT symbol, which
1319 indicates to the C program that the setgrent() routine is available
1320 for initializing sequential access to the group database.
1322 d_setgrps (d_setgrps.U):
1323 This variable conditionally defines the HAS_SETGROUPS symbol, which
1324 indicates to the C program that the setgroups() routine is available
1325 to set the list of process groups.
1327 d_sethent (d_sethent.U):
1328 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1331 d_setlinebuf (d_setlnbuf.U):
1332 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1333 indicates to the C program that the setlinebuf() routine is available
1334 to change stderr or stdout from block-buffered or unbuffered to a
1337 d_setlocale (d_setlocale.U):
1338 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1339 available to handle locale-specific ctype implementations.
1341 d_setnent (d_setnent.U):
1342 This variable conditionally defines HAS_SETNETENT if setnetent() is
1345 d_setpent (d_setpent.U):
1346 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1349 d_setpgid (d_setpgid.U):
1350 This variable conditionally defines the HAS_SETPGID symbol if the
1351 setpgid(pid, gpid) function is available to set process group ID.
1353 d_setpgrp2 (d_setpgrp2.U):
1354 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1355 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1356 is available to set the current process group.
1358 d_setpgrp (d_setpgrp.U):
1359 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1360 available to set the current process group.
1362 d_setprior (d_setprior.U):
1363 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1364 is available to set a process's priority.
1366 d_setproctitle (d_setproctitle.U):
1367 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1368 which indicates to the C program that the setproctitle() routine
1371 d_setpwent (d_setpwent.U):
1372 This variable conditionally defines the HAS_SETPWENT symbol, which
1373 indicates to the C program that the setpwent() routine is available
1374 for initializing sequential access to the passwd database.
1376 d_setregid (d_setregid.U):
1377 This variable conditionally defines HAS_SETREGID if setregid() is
1378 available to change the real and effective gid of the current
1381 d_setresgid (d_setregid.U):
1382 This variable conditionally defines HAS_SETRESGID if setresgid() is
1383 available to change the real, effective and saved gid of the current
1386 d_setresuid (d_setreuid.U):
1387 This variable conditionally defines HAS_SETREUID if setresuid() is
1388 available to change the real, effective and saved uid of the current
1391 d_setreuid (d_setreuid.U):
1392 This variable conditionally defines HAS_SETREUID if setreuid() is
1393 available to change the real and effective uid of the current
1396 d_setrgid (d_setrgid.U):
1397 This variable conditionally defines the HAS_SETRGID symbol, which
1398 indicates to the C program that the setrgid() routine is available
1399 to change the real gid of the current program.
1401 d_setruid (d_setruid.U):
1402 This variable conditionally defines the HAS_SETRUID symbol, which
1403 indicates to the C program that the setruid() routine is available
1404 to change the real uid of the current program.
1406 d_setsent (d_setsent.U):
1407 This variable conditionally defines HAS_SETSERVENT if setservent() is
1410 d_setsid (d_setsid.U):
1411 This variable conditionally defines HAS_SETSID if setsid() is
1412 available to set the process group ID.
1414 d_setvbuf (d_setvbuf.U):
1415 This variable conditionally defines the HAS_SETVBUF symbol, which
1416 indicates to the C program that the setvbuf() routine is available
1417 to change buffering on an open stdio stream.
1420 This variable conditionally defines the USE_SFIO symbol,
1421 and indicates whether sfio is available (and should be used).
1424 This variable conditionally defines the HAS_SHM symbol, which
1425 indicates that the entire shm*(2) library is present.
1427 d_shmat (d_shmat.U):
1428 This variable conditionally defines the HAS_SHMAT symbol, which
1429 indicates to the C program that the shmat() routine is available.
1431 d_shmatprototype (d_shmat.U):
1432 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1433 symbol, which indicates that sys/shm.h has a prototype for
1436 d_shmctl (d_shmctl.U):
1437 This variable conditionally defines the HAS_SHMCTL symbol, which
1438 indicates to the C program that the shmctl() routine is available.
1440 d_shmdt (d_shmdt.U):
1441 This variable conditionally defines the HAS_SHMDT symbol, which
1442 indicates to the C program that the shmdt() routine is available.
1444 d_shmget (d_shmget.U):
1445 This variable conditionally defines the HAS_SHMGET symbol, which
1446 indicates to the C program that the shmget() routine is available.
1448 d_sigaction (d_sigaction.U):
1449 This variable conditionally defines the HAS_SIGACTION symbol, which
1450 indicates that the Vr4 sigaction() routine is available.
1452 d_sigprocmask (d_sigprocmask.U):
1453 This variable conditionally defines HAS_SIGPROCMASK
1454 if sigprocmask() is available to examine or change the signal mask
1455 of the calling process.
1457 d_sigsetjmp (d_sigsetjmp.U):
1458 This variable conditionally defines the HAS_SIGSETJMP symbol,
1459 which indicates that the sigsetjmp() routine is available to
1460 call setjmp() and optionally save the process's signal mask.
1462 d_socket (d_socket.U):
1463 This variable conditionally defines HAS_SOCKET, which indicates
1464 that the BSD socket interface is supported.
1466 d_socklen_t (d_socklen_t.U):
1467 This symbol will be defined if the C compiler supports socklen_t.
1469 d_sockpair (d_socket.U):
1470 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1471 indicates that the BSD socketpair() is supported.
1473 d_socks5_init (d_socks5_init.U):
1474 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1475 indicates to the C program that the socks5_init() routine is available.
1477 d_sqrtl (d_sqrtl.U):
1478 This variable conditionally defines the HAS_SQRTL symbol, which
1479 indicates to the C program that the sqrtl() routine is available.
1481 d_statblks (d_statblks.U):
1482 This variable conditionally defines USE_STAT_BLOCKS
1483 if this system has a stat structure declaring
1484 st_blksize and st_blocks.
1486 d_statfs_f_flags (d_statfs_f_flags.U):
1487 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1488 symbol, which indicates to struct statfs from has f_flags member.
1489 This kind of struct statfs is coming from sys/mount.h (BSD),
1490 not from sys/statfs.h (SYSV).
1492 d_statfs_s (d_statfs_s.U):
1493 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1494 which indicates that the struct statfs is supported.
1496 d_statvfs (d_statvfs.U):
1497 This variable conditionally defines the HAS_STATVFS symbol, which
1498 indicates to the C program that the statvfs() routine is available.
1500 d_stdio_cnt_lval (d_stdstdio.U):
1501 This variable conditionally defines STDIO_CNT_LVALUE if the
1502 FILE_cnt macro can be used as an lvalue.
1504 d_stdio_ptr_lval (d_stdstdio.U):
1505 This variable conditionally defines STDIO_PTR_LVALUE if the
1506 FILE_ptr macro can be used as an lvalue.
1508 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1509 This symbol is defined if using the FILE_ptr macro as an lvalue
1510 to increase the pointer by n leaves File_cnt(fp) unchanged.
1512 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1513 This symbol is defined if using the FILE_ptr macro as an lvalue
1514 to increase the pointer by n has the side effect of decreasing the
1515 value of File_cnt(fp) by n.
1517 d_stdio_stream_array (stdio_streams.U):
1518 This variable tells whether there is an array holding
1521 d_stdiobase (d_stdstdio.U):
1522 This variable conditionally defines USE_STDIO_BASE if this system
1523 has a FILE structure declaring a usable _base field (or equivalent)
1526 d_stdstdio (d_stdstdio.U):
1527 This variable conditionally defines USE_STDIO_PTR if this system
1528 has a FILE structure declaring usable _ptr and _cnt fields (or
1529 equivalent) in stdio.h.
1531 d_strchr (d_strchr.U):
1532 This variable conditionally defines HAS_STRCHR if strchr() and
1533 strrchr() are available for string searching.
1535 d_strcoll (d_strcoll.U):
1536 This variable conditionally defines HAS_STRCOLL if strcoll() is
1537 available to compare strings using collating information.
1539 d_strctcpy (d_strctcpy.U):
1540 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1541 indicates to the C program that this C compiler knows how to copy
1544 d_strerrm (d_strerror.U):
1545 This variable holds what Strerrr is defined as to translate an error
1546 code condition into an error message string. It could be 'strerror'
1547 or a more complex macro emulating strrror with sys_errlist[], or the
1548 "unknown" string when both strerror and sys_errlist are missing.
1550 d_strerror (d_strerror.U):
1551 This variable conditionally defines HAS_STRERROR if strerror() is
1552 available to translate error numbers to strings.
1554 d_strtod (d_strtod.U):
1555 This variable conditionally defines the HAS_STRTOD symbol, which
1556 indicates to the C program that the strtod() routine is available
1557 to provide better numeric string conversion than atof().
1559 d_strtol (d_strtol.U):
1560 This variable conditionally defines the HAS_STRTOL symbol, which
1561 indicates to the C program that the strtol() routine is available
1562 to provide better numeric string conversion than atoi() and friends.
1564 d_strtold (d_strtold.U):
1565 This variable conditionally defines the HAS_STRTOLD symbol, which
1566 indicates to the C program that the strtold() routine is available.
1568 d_strtoll (d_strtoll.U):
1569 This variable conditionally defines the HAS_STRTOLL symbol, which
1570 indicates to the C program that the strtoll() routine is available.
1572 d_strtoq (d_strtoq.U):
1573 This variable conditionally defines the HAS_STRTOQ symbol, which
1574 indicates to the C program that the strtoq() routine is available.
1576 d_strtoul (d_strtoul.U):
1577 This variable conditionally defines the HAS_STRTOUL symbol, which
1578 indicates to the C program that the strtoul() routine is available
1579 to provide conversion of strings to unsigned long.
1581 d_strtoull (d_strtoull.U):
1582 This variable conditionally defines the HAS_STRTOULL symbol, which
1583 indicates to the C program that the strtoull() routine is available.
1585 d_strtouq (d_strtouq.U):
1586 This variable conditionally defines the HAS_STRTOUQ symbol, which
1587 indicates to the C program that the strtouq() routine is available.
1589 d_strxfrm (d_strxfrm.U):
1590 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1591 available to transform strings.
1593 d_suidsafe (d_dosuid.U):
1594 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1595 if setuid scripts can be secure. This test looks in /dev/fd/.
1597 d_symlink (d_symlink.U):
1598 This variable conditionally defines the HAS_SYMLINK symbol, which
1599 indicates to the C program that the symlink() routine is available
1600 to create symbolic links.
1602 d_syscall (d_syscall.U):
1603 This variable conditionally defines HAS_SYSCALL if syscall() is
1604 available call arbitrary system calls.
1606 d_sysconf (d_sysconf.U):
1607 This variable conditionally defines the HAS_SYSCONF symbol, which
1608 indicates to the C program that the sysconf() routine is available
1609 to determine system related limits and options.
1611 d_sysernlst (d_strerror.U):
1612 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1613 is available to translate error numbers to the symbolic name.
1615 d_syserrlst (d_strerror.U):
1616 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1617 available to translate error numbers to strings.
1619 d_system (d_system.U):
1620 This variable conditionally defines HAS_SYSTEM if system() is
1621 available to issue a shell command.
1623 d_tcgetpgrp (d_tcgtpgrp.U):
1624 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1625 indicates to the C program that the tcgetpgrp() routine is available.
1626 to get foreground process group ID.
1628 d_tcsetpgrp (d_tcstpgrp.U):
1629 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1630 indicates to the C program that the tcsetpgrp() routine is available
1631 to set foreground process group ID.
1633 d_telldir (d_readdir.U):
1634 This variable conditionally defines HAS_TELLDIR if telldir() is
1637 d_telldirproto (d_telldirproto.U):
1638 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1639 which indicates to the C program that the system provides
1640 a prototype for the telldir() function. Otherwise, it is
1641 up to the program to supply one.
1644 This variable conditionally defines the HAS_TIME symbol, which indicates
1645 that the time() routine exists. The time() routine is normaly
1646 provided on UNIX systems.
1648 d_times (d_times.U):
1649 This variable conditionally defines the HAS_TIMES symbol, which indicates
1650 that the times() routine exists. The times() routine is normaly
1651 provided on UNIX systems. You may have to include <sys/times.h>.
1653 d_truncate (d_truncate.U):
1654 This variable conditionally defines HAS_TRUNCATE if truncate() is
1655 available to truncate files.
1657 d_tzname (d_tzname.U):
1658 This variable conditionally defines HAS_TZNAME if tzname[] is
1659 available to access timezone names.
1661 d_umask (d_umask.U):
1662 This variable conditionally defines the HAS_UMASK symbol, which
1663 indicates to the C program that the umask() routine is available.
1664 to set and get the value of the file creation mask.
1666 d_uname (d_gethname.U):
1667 This variable conditionally defines the HAS_UNAME symbol, which
1668 indicates to the C program that the uname() routine may be
1669 used to derive the host name.
1671 d_union_semun (d_union_semun.U):
1672 This variable conditionally defines HAS_UNION_SEMUN if the
1673 union semun is defined by including <sys/sem.h>.
1675 d_ustat (d_ustat.U):
1676 This variable conditionally defines HAS_USTAT if ustat() is
1677 available to query file system statistics by dev_t.
1679 d_vendorarch (vendorarch.U):
1680 This variable conditionally defined PERL_VENDORARCH.
1682 d_vendorbin (vendorbin.U):
1683 This variable conditionally defines PERL_VENDORBIN.
1685 d_vendorlib (vendorlib.U):
1686 This variable conditionally defines PERL_VENDORLIB.
1688 d_vfork (d_vfork.U):
1689 This variable conditionally defines the HAS_VFORK symbol, which
1690 indicates the vfork() routine is available.
1692 d_void_closedir (d_closedir.U):
1693 This variable conditionally defines VOID_CLOSEDIR if closedir()
1694 does not return a value.
1696 d_voidsig (d_voidsig.U):
1697 This variable conditionally defines VOIDSIG if this system
1698 declares "void (*signal(...))()" in signal.h. The old way was to
1699 declare it as "int (*signal(...))()".
1701 d_voidtty (i_sysioctl.U):
1702 This variable conditionally defines USE_IOCNOTTY to indicate that the
1703 ioctl() call with TIOCNOTTY should be used to void tty association.
1704 Otherwise (on USG probably), it is enough to close the standard file
1705 decriptors and do a setpgrp().
1707 d_volatile (d_volatile.U):
1708 This variable conditionally defines the HASVOLATILE symbol, which
1709 indicates to the C program that this C compiler knows about the
1710 volatile declaration.
1712 d_vprintf (d_vprintf.U):
1713 This variable conditionally defines the HAS_VPRINTF symbol, which
1714 indicates to the C program that the vprintf() routine is available
1715 to printf with a pointer to an argument list.
1717 d_wait4 (d_wait4.U):
1718 This variable conditionally defines the HAS_WAIT4 symbol, which
1719 indicates the wait4() routine is available.
1721 d_waitpid (d_waitpid.U):
1722 This variable conditionally defines HAS_WAITPID if waitpid() is
1723 available to wait for child process.
1725 d_wcstombs (d_wcstombs.U):
1726 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1727 indicates to the C program that the wcstombs() routine is available
1728 to convert wide character strings to multibyte strings.
1730 d_wctomb (d_wctomb.U):
1731 This variable conditionally defines the HAS_WCTOMB symbol, which
1732 indicates to the C program that the wctomb() routine is available
1733 to convert a wide character to a multibyte.
1736 This variable conditionally defines the symbol XENIX, which alerts
1737 the C program that it runs under Xenix.
1740 This variable is used internally by Configure to determine the
1741 full pathname (if any) of the date program. After Configure runs,
1742 the value is reset to a plain "date" and is not useful.
1744 db_hashtype (i_db.U):
1745 This variable contains the type of the hash structure element
1746 in the <db.h> header file. In older versions of DB, it was
1747 int, while in newer ones it is u_int32_t.
1749 db_prefixtype (i_db.U):
1750 This variable contains the type of the prefix structure element
1751 in the <db.h> header file. In older versions of DB, it was
1752 int, while in newer ones it is size_t.
1754 defvoidused (voidflags.U):
1755 This variable contains the default value of the VOIDUSED symbol (15).
1757 direntrytype (i_dirent.U):
1758 This symbol is set to 'struct direct' or 'struct dirent' depending on
1759 whether dirent is available or not. You should use this pseudo type to
1760 portably declare your directory entries.
1763 This variable contains the extension that is to be used for the
1764 dynamically loaded modules that perl generaties.
1767 This variable contains the name of the dynamic loading file that
1768 will be used with the package.
1770 doublesize (doublesize.U):
1771 This variable contains the value of the DOUBLESIZE symbol, which
1772 indicates to the C program how many bytes there are in a double.
1774 drand01 (randfunc.U):
1775 Indicates the macro to be used to generate normalized
1776 random numbers. Uses randfunc, often divided by
1777 (double) (((unsigned long) 1 << randbits)) in order to
1778 normalize the result.
1779 In C programs, the macro 'Drand01' is mapped to drand01.
1781 dynamic_ext (Extensions.U):
1782 This variable holds a list of XS extension files we want to
1783 link dynamically into the package. It is used by Makefile.
1785 eagain (nblock_io.U):
1786 This variable bears the symbolic errno code set by read() when no
1787 data is present on the file and non-blocking I/O was enabled (otherwise,
1788 read() blocks naturally).
1791 This variable conditionally defines EBCDIC if this
1792 system uses EBCDIC encoding. Among other things, this
1793 means that the character ranges are not contiguous.
1797 This variable is used internally by Configure to determine the
1798 full pathname (if any) of the echo program. After Configure runs,
1799 the value is reset to a plain "echo" and is not useful.
1802 This variable is used internally by Configure to determine the
1803 full pathname (if any) of the egrep program. After Configure runs,
1804 the value is reset to a plain "egrep" and is not useful.
1807 This variable is defined but not used by Configure.
1808 The value is a plain '' and is not useful.
1811 When running under Eunice this variable contains a command which will
1812 convert a shell script to the proper form of text file for it to be
1813 executable by the shell. On other systems it is a no-op.
1816 This is an old synonym for _exe.
1819 This variable is used internally by Configure to determine the
1820 full pathname (if any) of the expr program. After Configure runs,
1821 the value is reset to a plain "expr" and is not useful.
1823 extensions (Extensions.U):
1824 This variable holds a list of all extension files (both XS and
1825 non-xs linked into the package. It is propagated to Config.pm
1826 and is typically used to test whether a particular extesion
1829 fflushall (fflushall.U):
1830 This symbol, if defined, tells that to flush
1831 all pending stdio output one must loop through all
1832 the stdio file handles stored in an array and fflush them.
1833 Note that if fflushNULL is defined, fflushall will not
1834 even be probed for and will be left undefined.
1836 fflushNULL (fflushall.U):
1837 This symbol, if defined, tells that fflush(NULL) does flush
1838 all pending stdio output.
1841 This variable is defined but not used by Configure.
1842 The value is a plain '' and is not useful.
1844 firstmakefile (Unix.U):
1845 This variable defines the first file searched by make. On unix,
1846 it is makefile (then Makefile). On case-insensitive systems,
1847 it might be something else. This is only used to deal with
1848 convoluted make depend tricks.
1851 This variable is defined but not used by Configure.
1852 The value is a plain '' and is not useful.
1854 fpossize (fpossize.U):
1855 This variable contains the size of a fpostype in bytes.
1857 fpostype (fpostype.U):
1858 This variable defines Fpos_t to be something like fpos_t, long,
1859 uint, or whatever type is used to declare file positions in libc.
1861 freetype (mallocsrc.U):
1862 This variable contains the return type of free(). It is usually
1863 void, but occasionally int.
1866 This variable contains the full pathname to 'ar', whether or
1867 not the user has specified 'portability'. This is only used
1871 This variable contains the full pathname to 'csh', whether or
1872 not the user has specified 'portability'. This is only used
1873 in the compiled C program, and we assume that all systems which
1874 can share this executable will have the same full pathname to
1877 full_sed (Loc_sed.U):
1878 This variable contains the full pathname to 'sed', whether or
1879 not the user has specified 'portability'. This is only used
1880 in the compiled C program, and we assume that all systems which
1881 can share this executable will have the same full pathname to
1884 gccosandvers (gccvers.U):
1885 If GNU cc (gcc) is used, this variable the operating system and
1886 version used to compile the gcc. It is set to '' if not gcc,
1887 or if nothing useful can be parsed as the os version.
1889 gccversion (gccvers.U):
1890 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1891 indicate whether the compiler is version 1 or 2. This is used in
1892 setting some of the default cflags. It is set to '' if not gcc.
1895 This variable contains the format string used for printing a Gid_t.
1897 gidsign (gidsign.U):
1898 This variable contains the signedness of a gidtype.
1899 1 for unsigned, -1 for signed.
1901 gidsize (gidsize.U):
1902 This variable contains the size of a gidtype in bytes.
1904 gidtype (gidtype.U):
1905 This variable defines Gid_t to be something like gid_t, int,
1906 ushort, or whatever type is used to declare the return type
1907 of getgid(). Typically, it is the type of group ids in the kernel.
1910 This variable holds the general path (space-separated) used to
1911 find libraries. It may contain directories that do not exist on
1912 this platform, libpth is the cleaned-up version.
1915 This variable is used internally by Configure to determine the
1916 full pathname (if any) of the grep program. After Configure runs,
1917 the value is reset to a plain "grep" and is not useful.
1920 This variable contains a command that produces the text of the
1921 /etc/group file. This is normally "cat /etc/group", but can be
1922 "ypcat group" when NIS is used.
1923 On some systems, such as os390, there may be no equivalent
1924 command, in which case this variable is unset.
1926 groupstype (groupstype.U):
1927 This variable defines Groups_t to be something like gid_t, int,
1928 ushort, or whatever type is used for the second argument to
1929 getgroups() and setgroups(). Usually, this is the same as
1930 gidtype (gid_t), but sometimes it isn't.
1933 This variable is used internally by Configure to determine the
1934 full pathname (if any) of the gzip program. After Configure runs,
1935 the value is reset to a plain "gzip" and is not useful.
1937 h_fcntl (h_fcntl.U):
1938 This is variable gets set in various places to tell i_fcntl that
1939 <fcntl.h> should be included.
1941 h_sysfile (h_sysfile.U):
1942 This is variable gets set in various places to tell i_sys_file that
1943 <sys/file.h> should be included.
1946 Gives the type of hints used for previous answers. May be one of
1947 "default", "recommended" or "previous".
1950 This variable contains a command that produces the text of the
1951 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1952 "ypcat hosts" when NIS is used.
1953 On some systems, such as os390, there may be no equivalent
1954 command, in which case this variable is unset.
1957 This variable is the size of an I16 in bytes.
1960 This variable contains the C type used for Perl's I16.
1963 This variable is the size of an I32 in bytes.
1966 This variable contains the C type used for Perl's I32.
1969 This variable is the size of an I64 in bytes.
1972 This variable contains the C type used for Perl's I64.
1975 This variable is the size of an I8 in bytes.
1978 This variable contains the C type used for Perl's I8.
1980 i_arpainet (i_arpainet.U):
1981 This variable conditionally defines the I_ARPA_INET symbol,
1982 and indicates whether a C program should include <arpa/inet.h>.
1984 i_bsdioctl (i_sysioctl.U):
1985 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1986 indicates to the C program that <sys/bsdioctl.h> exists and should
1990 This variable conditionally defines the I_DB symbol, and indicates
1991 whether a C program may include Berkeley's DB include file <db.h>.
1994 This variable conditionally defines the I_DBM symbol, which
1995 indicates to the C program that <dbm.h> exists and should
1998 i_dirent (i_dirent.U):
1999 This variable conditionally defines I_DIRENT, which indicates
2000 to the C program that it should include <dirent.h>.
2003 This variable conditionally defines the I_DLD symbol, which
2004 indicates to the C program that <dld.h> (GNU dynamic loading)
2005 exists and should be included.
2007 i_dlfcn (i_dlfcn.U):
2008 This variable conditionally defines the I_DLFCN symbol, which
2009 indicates to the C program that <dlfcn.h> exists and should
2012 i_fcntl (i_fcntl.U):
2013 This variable controls the value of I_FCNTL (which tells
2014 the C program to include <fcntl.h>).
2016 i_float (i_float.U):
2017 This variable conditionally defines the I_FLOAT symbol, and indicates
2018 whether a C program may include <float.h> to get symbols like DBL_MAX
2019 or DBL_MIN, i.e. machine dependent floating point values.
2022 This variable conditionally defines the I_GDBM symbol, which
2023 indicates to the C program that <gdbm.h> exists and should
2027 This variable conditionally defines the I_GRP symbol, and indicates
2028 whether a C program should include <grp.h>.
2030 i_iconv (i_iconv.U):
2031 This variable conditionally defines the I_ICONV symbol, and indicates
2032 whether a C program should include <iconv.h>.
2034 i_ieeefp (i_ieeefp.U):
2035 This variable conditionally defines the I_IEEEFP symbol, and indicates
2036 whether a C program should include <ieeefp.h>.
2038 i_inttypes (i_inttypes.U):
2039 This variable conditionally defines the I_INTTYPES symbol,
2040 and indicates whether a C program should include <inttypes.h>.
2042 i_libutil (i_libutil.U):
2043 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2044 whether a C program should include <libutil.h>.
2046 i_limits (i_limits.U):
2047 This variable conditionally defines the I_LIMITS symbol, and indicates
2048 whether a C program may include <limits.h> to get symbols like WORD_BIT
2051 i_locale (i_locale.U):
2052 This variable conditionally defines the I_LOCALE symbol,
2053 and indicates whether a C program should include <locale.h>.
2055 i_machcthr (i_machcthr.U):
2056 This variable conditionally defines the I_MACH_CTHREADS symbol,
2057 and indicates whether a C program should include <mach/cthreads.h>.
2059 i_malloc (i_malloc.U):
2060 This variable conditionally defines the I_MALLOC symbol, and indicates
2061 whether a C program should include <malloc.h>.
2064 This variable conditionally defines the I_MATH symbol, and indicates
2065 whether a C program may include <math.h>.
2067 i_memory (i_memory.U):
2068 This variable conditionally defines the I_MEMORY symbol, and indicates
2069 whether a C program should include <memory.h>.
2071 i_mntent (i_mntent.U):
2072 This variable conditionally defines the I_MNTENT symbol, and indicates
2073 whether a C program should include <mntent.h>.
2076 This variable conditionally defines the I_NDBM symbol, which
2077 indicates to the C program that <ndbm.h> exists and should
2080 i_netdb (i_netdb.U):
2081 This variable conditionally defines the I_NETDB symbol, and indicates
2082 whether a C program should include <netdb.h>.
2084 i_neterrno (i_neterrno.U):
2085 This variable conditionally defines the I_NET_ERRNO symbol, which
2086 indicates to the C program that <net/errno.h> exists and should
2089 i_netinettcp (i_netinettcp.U):
2090 This variable conditionally defines the I_NETINET_TCP symbol,
2091 and indicates whether a C program should include <netinet/tcp.h>.
2094 This variable conditionally defines I_NETINET_IN, which indicates
2095 to the C program that it should include <netinet/in.h>. Otherwise,
2096 you may try <sys/in.h>.
2099 This variable conditionally defines the I_POLL symbol, and indicates
2100 whether a C program should include <poll.h>.
2103 This variable conditionally defines the I_PROT symbol, and indicates
2104 whether a C program should include <prot.h>.
2106 i_pthread (i_pthread.U):
2107 This variable conditionally defines the I_PTHREAD symbol,
2108 and indicates whether a C program should include <pthread.h>.
2111 This variable conditionally defines I_PWD, which indicates
2112 to the C program that it should include <pwd.h>.
2114 i_rpcsvcdbm (i_dbm.U):
2115 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2116 indicates to the C program that <rpcsvc/dbm.h> exists and should
2117 be included. Some System V systems might need this instead of <dbm.h>.
2120 This variable conditionally defines the I_SFIO symbol,
2121 and indicates whether a C program should include <sfio.h>.
2123 i_sgtty (i_termio.U):
2124 This variable conditionally defines the I_SGTTY symbol, which
2125 indicates to the C program that it should include <sgtty.h> rather
2128 i_shadow (i_shadow.U):
2129 This variable conditionally defines the I_SHADOW symbol, and indicates
2130 whether a C program should include <shadow.h>.
2132 i_socks (i_socks.U):
2133 This variable conditionally defines the I_SOCKS symbol, and indicates
2134 whether a C program should include <socks.h>.
2136 i_stdarg (i_varhdr.U):
2137 This variable conditionally defines the I_STDARG symbol, which
2138 indicates to the C program that <stdarg.h> exists and should
2141 i_stddef (i_stddef.U):
2142 This variable conditionally defines the I_STDDEF symbol, which
2143 indicates to the C program that <stddef.h> exists and should
2146 i_stdlib (i_stdlib.U):
2147 This variable conditionally defines the I_STDLIB symbol, which
2148 indicates to the C program that <stdlib.h> exists and should
2151 i_string (i_string.U):
2152 This variable conditionally defines the I_STRING symbol, which
2153 indicates that <string.h> should be included rather than <strings.h>.
2155 i_sunmath (i_sunmath.U):
2156 This variable conditionally defines the I_SUNMATH symbol, and indicates
2157 whether a C program should include <sunmath.h>.
2159 i_sysaccess (i_sysaccess.U):
2160 This variable conditionally defines the I_SYS_ACCESS symbol,
2161 and indicates whether a C program should include <sys/access.h>.
2163 i_sysdir (i_sysdir.U):
2164 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2165 whether a C program should include <sys/dir.h>.
2167 i_sysfile (i_sysfile.U):
2168 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2169 whether a C program should include <sys/file.h> to get R_OK and friends.
2171 i_sysfilio (i_sysioctl.U):
2172 This variable conditionally defines the I_SYS_FILIO symbol, which
2173 indicates to the C program that <sys/filio.h> exists and should
2174 be included in preference to <sys/ioctl.h>.
2177 This variable conditionally defines I_SYS_IN, which indicates
2178 to the C program that it should include <sys/in.h> instead of
2181 i_sysioctl (i_sysioctl.U):
2182 This variable conditionally defines the I_SYS_IOCTL symbol, which
2183 indicates to the C program that <sys/ioctl.h> exists and should
2186 i_syslog (i_syslog.U):
2187 This variable conditionally defines the I_SYSLOG symbol,
2188 and indicates whether a C program should include <syslog.h>.
2190 i_sysmman (i_sysmman.U):
2191 This variable conditionally defines the I_SYS_MMAN symbol, and
2192 indicates whether a C program should include <sys/mman.h>.
2194 i_sysmode (i_sysmode.U):
2195 This variable conditionally defines the I_SYSMODE symbol,
2196 and indicates whether a C program should include <sys/mode.h>.
2198 i_sysmount (i_sysmount.U):
2199 This variable conditionally defines the I_SYSMOUNT symbol,
2200 and indicates whether a C program should include <sys/mount.h>.
2202 i_sysndir (i_sysndir.U):
2203 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2204 whether a C program should include <sys/ndir.h>.
2206 i_sysparam (i_sysparam.U):
2207 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2208 whether a C program should include <sys/param.h>.
2210 i_sysresrc (i_sysresrc.U):
2211 This variable conditionally defines the I_SYS_RESOURCE symbol,
2212 and indicates whether a C program should include <sys/resource.h>.
2214 i_syssecrt (i_syssecrt.U):
2215 This variable conditionally defines the I_SYS_SECURITY symbol,
2216 and indicates whether a C program should include <sys/security.h>.
2218 i_sysselct (i_sysselct.U):
2219 This variable conditionally defines I_SYS_SELECT, which indicates
2220 to the C program that it should include <sys/select.h> in order to
2221 get the definition of struct timeval.
2223 i_syssockio (i_sysioctl.U):
2224 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2225 C program that socket ioctl codes may be found in <sys/sockio.h>
2226 instead of <sys/ioctl.h>.
2228 i_sysstat (i_sysstat.U):
2229 This variable conditionally defines the I_SYS_STAT symbol,
2230 and indicates whether a C program should include <sys/stat.h>.
2232 i_sysstatfs (i_sysstatfs.U):
2233 This variable conditionally defines the I_SYSSTATFS symbol,
2234 and indicates whether a C program should include <sys/statfs.h>.
2236 i_sysstatvfs (i_sysstatvfs.U):
2237 This variable conditionally defines the I_SYSSTATVFS symbol,
2238 and indicates whether a C program should include <sys/statvfs.h>.
2240 i_systime (i_time.U):
2241 This variable conditionally defines I_SYS_TIME, which indicates
2242 to the C program that it should include <sys/time.h>.
2244 i_systimek (i_time.U):
2245 This variable conditionally defines I_SYS_TIME_KERNEL, which
2246 indicates to the C program that it should include <sys/time.h>
2247 with KERNEL defined.
2249 i_systimes (i_systimes.U):
2250 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2251 whether a C program should include <sys/times.h>.
2253 i_systypes (i_systypes.U):
2254 This variable conditionally defines the I_SYS_TYPES symbol,
2255 and indicates whether a C program should include <sys/types.h>.
2257 i_sysuio (i_sysuio.U):
2258 This variable conditionally defines the I_SYSUIO symbol, and indicates
2259 whether a C program should include <sys/uio.h>.
2261 i_sysun (i_sysun.U):
2262 This variable conditionally defines I_SYS_UN, which indicates
2263 to the C program that it should include <sys/un.h> to get UNIX
2264 domain socket definitions.
2266 i_sysutsname (i_sysutsname.U):
2267 This variable conditionally defines the I_SYSUTSNAME symbol,
2268 and indicates whether a C program should include <sys/utsname.h>.
2270 i_sysvfs (i_sysvfs.U):
2271 This variable conditionally defines the I_SYSVFS symbol,
2272 and indicates whether a C program should include <sys/vfs.h>.
2274 i_syswait (i_syswait.U):
2275 This variable conditionally defines I_SYS_WAIT, which indicates
2276 to the C program that it should include <sys/wait.h>.
2278 i_termio (i_termio.U):
2279 This variable conditionally defines the I_TERMIO symbol, which
2280 indicates to the C program that it should include <termio.h> rather
2283 i_termios (i_termio.U):
2284 This variable conditionally defines the I_TERMIOS symbol, which
2285 indicates to the C program that the POSIX <termios.h> file is
2289 This variable conditionally defines I_TIME, which indicates
2290 to the C program that it should include <time.h>.
2292 i_unistd (i_unistd.U):
2293 This variable conditionally defines the I_UNISTD symbol, and indicates
2294 whether a C program should include <unistd.h>.
2296 i_ustat (i_ustat.U):
2297 This variable conditionally defines the I_USTAT symbol, and indicates
2298 whether a C program should include <ustat.h>.
2300 i_utime (i_utime.U):
2301 This variable conditionally defines the I_UTIME symbol, and indicates
2302 whether a C program should include <utime.h>.
2304 i_values (i_values.U):
2305 This variable conditionally defines the I_VALUES symbol, and indicates
2306 whether a C program may include <values.h> to get symbols like MAXLONG
2309 i_varargs (i_varhdr.U):
2310 This variable conditionally defines I_VARARGS, which indicates
2311 to the C program that it should include <varargs.h>.
2313 i_varhdr (i_varhdr.U):
2314 Contains the name of the header to be included to get va_dcl definition.
2315 Typically one of varargs.h or stdarg.h.
2317 i_vfork (i_vfork.U):
2318 This variable conditionally defines the I_VFORK symbol, and indicates
2319 whether a C program should include vfork.h.
2321 ignore_versioned_solibs (libs.U):
2322 This variable should be non-empty if non-versioned shared
2323 libraries (libfoo.so.x.y) are to be ignored (because they
2324 cannot be linked against).
2326 inc_version_list (inc_version_list.U):
2327 This variable specifies the list of subdirectories in over
2328 which perl.c:incpush() and lib/lib.pm will automatically
2329 search when adding directories to @INC. The elements in
2330 the list are separated by spaces. This is only useful
2331 if you have a perl library directory tree structured like the
2332 default one. See INSTALL for how this works. The versioned
2333 site_perl directory was introduced in 5.005, so that is the
2334 lowest possible value.
2336 inc_version_list_init (inc_version_list.U):
2337 This variable holds the same list as inc_version_list, but
2338 each item is enclosed in double quotes and separated by commas,
2339 suitable for use in the PERL_INC_VERSION_LIST initialization.
2342 This variable must preceed the normal include path to get hte
2343 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2344 Value can be "" or "/bsd43" on mips.
2347 This variable is defined but not used by Configure.
2348 The value is a plain '' and is not useful.
2350 installarchlib (archlib.U):
2351 This variable is really the same as archlibexp but may differ on
2352 those systems using AFS. For extra portability, only this variable
2353 should be used in makefiles.
2356 This variable is the same as binexp unless AFS is running in which case
2357 the user is explicitely prompted for it. This variable should always
2358 be used in your makefiles for maximum portability.
2360 installman1dir (man1dir.U):
2361 This variable is really the same as man1direxp, unless you are using
2362 AFS in which case it points to the read/write location whereas
2363 man1direxp only points to the read-only access location. For extra
2364 portability, you should only use this variable within your makefiles.
2366 installman3dir (man3dir.U):
2367 This variable is really the same as man3direxp, unless you are using
2368 AFS in which case it points to the read/write location whereas
2369 man3direxp only points to the read-only access location. For extra
2370 portability, you should only use this variable within your makefiles.
2372 installprefix (installprefix.U):
2373 This variable holds the name of the directory below which
2374 "make install" will install the package. For most users, this
2375 is the same as prefix. However, it is useful for
2376 installing the software into a different (usually temporary)
2377 location after which it can be bundled up and moved somehow
2378 to the final location specified by prefix.
2380 installprefixexp (installprefix.U):
2381 This variable holds the full absolute path of installprefix
2382 with all ~-expansion done.
2384 installprivlib (privlib.U):
2385 This variable is really the same as privlibexp but may differ on
2386 those systems using AFS. For extra portability, only this variable
2387 should be used in makefiles.
2389 installscript (scriptdir.U):
2390 This variable is usually the same as scriptdirexp, unless you are on
2391 a system running AFS, in which case they may differ slightly. You
2392 should always use this variable within your makefiles for portability.
2394 installsitearch (sitearch.U):
2395 This variable is really the same as sitearchexp but may differ on
2396 those systems using AFS. For extra portability, only this variable
2397 should be used in makefiles.
2399 installsitebin (sitebin.U):
2400 This variable is usually the same as sitebinexp, unless you are on
2401 a system running AFS, in which case they may differ slightly. You
2402 should always use this variable within your makefiles for portability.
2404 installsitelib (sitelib.U):
2405 This variable is really the same as sitelibexp but may differ on
2406 those systems using AFS. For extra portability, only this variable
2407 should be used in makefiles.
2409 installstyle (installstyle.U):
2410 This variable describes the "style" of the perl installation.
2411 This is intended to be useful for tools that need to
2412 manipulate entire perl distributions. Perl itself doesn't use
2413 this to find its libraries -- the library directories are
2414 stored directly in Config.pm. Currently, there are only two
2415 styles: "lib" and "lib/perl5". The default library locations
2416 (e.g. privlib, sitelib) are either $prefix/lib or
2417 $prefix/lib/perl5. The former is useful if $prefix is a
2418 directory dedicated to perl (e.g. /opt/perl), while the latter
2419 is useful if $prefix is shared by many packages, e.g. if
2421 This may later be extended to include other information, so
2422 be careful with pattern-matching on the results.
2423 For compatibility with perl5.005 and earlier, the default
2424 setting is based on whether or not $prefix contains the string
2427 installusrbinperl (instubperl.U):
2428 This variable tells whether Perl should be installed also as
2429 /usr/bin/perl in addition to
2432 installvendorarch (vendorarch.U):
2433 This variable is really the same as vendorarchexp but may differ on
2434 those systems using AFS. For extra portability, only this variable
2435 should be used in makefiles.
2437 installvendorbin (vendorbin.U):
2438 This variable is really the same as vendorbinexp but may differ on
2439 those systems using AFS. For extra portability, only this variable
2440 should be used in makefiles.
2442 installvendorlib (vendorlib.U):
2443 This variable is really the same as vendorlibexp but may differ on
2444 those systems using AFS. For extra portability, only this variable
2445 should be used in makefiles.
2447 intsize (intsize.U):
2448 This variable contains the value of the INTSIZE symbol, which
2449 indicates to the C program how many bytes there are in an int.
2451 issymlink (issymlink.U):
2452 This variable holds the test command to test for a symbolic link
2453 (if they are supported). Typical values include 'test -h' and
2456 ivdformat (perlxvf.U):
2457 This variable contains the format string used for printing
2458 a Perl IV as a signed decimal integer.
2461 This variable is the size of an IV in bytes.
2464 This variable contains the C type used for Perl's IV.
2466 known_extensions (Extensions.U):
2467 This variable holds a list of all XS extensions included in
2471 This variable is defined but not used by Configure.
2472 The value is a plain '' and is not useful.
2475 This variable indicates the program to be used to link
2476 libraries for dynamic loading. On some systems, it is 'ld'.
2477 On ELF systems, it should be $cc. Mostly, we'll try to respect
2478 the hint file setting.
2480 lddlflags (dlsrc.U):
2481 This variable contains any special flags that might need to be
2482 passed to $ld to create a shared library suitable for dynamic
2483 loading. It is up to the makefile to use it. For hpux, it
2484 should be '-b'. For sunos 4.1, it is empty.
2486 ldflags (ccflags.U):
2487 This variable contains any additional C loader flags desired by
2488 the user. It is up to the Makefile to use this.
2490 ldflags_uselargefiles (uselfs.U):
2491 This variable contains the loader flags needed by large file builds
2492 and added to ldflags by hints files.
2494 ldlibpthname (libperl.U):
2495 This variable holds the name of the shared library
2496 search path, often LD_LIBRARY_PATH. To get an empty
2497 string, the hints file must set this to 'none'.
2500 This variable is used internally by Configure to determine the
2501 full pathname (if any) of the less program. After Configure runs,
2502 the value is reset to a plain "less" and is not useful.
2505 This is an old synonym for _a.
2508 This variable contains the location of the C library.
2510 libperl (libperl.U):
2511 The perl executable is obtained by linking perlmain.c with
2512 libperl, any static extensions (usually just DynaLoader),
2513 and any other libraries needed on this system. libperl
2514 is usually libperl.a, but can also be libperl.so.xxx if
2515 the user wishes to build a perl executable with a shared
2519 This variable holds the general path (space-separated) used to find
2520 libraries. It is intended to be used by other units.
2523 This variable holds the additional libraries we want to use.
2524 It is up to the Makefile to deal with it.
2527 This variable holds the directory names aka dirnames of the libraries
2528 we found and accepted, duplicates are removed.
2531 This variable holds the filenames aka basenames of the libraries
2532 we found and accepted.
2535 This variable holds the full pathnames of the libraries
2536 we found and accepted.
2539 This variable holds the directory names probed for libraries.
2541 libswanted (Myinit.U):
2542 This variable holds a list of all the libraries we want to
2543 search. The order is chosen to pick up the c library
2544 ahead of ucb or bsd libraries for SVR4.
2546 libswanted_uselargefiles (uselfs.U):
2547 This variable contains the libraries needed by large file builds
2548 and added to ldflags by hints files. It is a space separated list
2549 of the library names without the "lib" prefix or any suffix, just
2553 This variable is defined but not used by Configure.
2554 The value is a plain '' and is not useful.
2557 This variable is defined but not used by Configure.
2558 The value is a plain '' and is not useful.
2560 lkflags (ccflags.U):
2561 This variable contains any additional C partial linker flags desired by
2562 the user. It is up to the Makefile to use this.
2565 This variable is used internally by Configure to determine the
2566 full pathname (if any) of the ln program. After Configure runs,
2567 the value is reset to a plain "ln" and is not useful.
2570 This variable holds the name of the command to make
2571 symbolic links (if they are supported). It can be used
2572 in the Makefile. It is either 'ln -s' or 'ln'
2574 locincpth (ccflags.U):
2575 This variable contains a list of additional directories to be
2576 searched by the compiler. The appropriate '-I' directives will
2577 be added to ccflags. This is intended to simplify setting
2578 local directories from the Configure command line.
2579 It's not much, but it parallels the loclibpth stuff in libpth.U.
2581 loclibpth (libpth.U):
2582 This variable holds the paths (space-separated) used to find local
2583 libraries. It is prepended to libpth, and is intended to be easily
2584 set from the command line.
2586 longdblsize (d_longdbl.U):
2587 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2588 indicates to the C program how many bytes there are in a long double,
2589 if this system supports long doubles.
2591 longlongsize (d_longlong.U):
2592 This variable contains the value of the LONGLONGSIZE symbol, which
2593 indicates to the C program how many bytes there are in a long long,
2594 if this system supports long long.
2596 longsize (intsize.U):
2597 This variable contains the value of the LONGSIZE symbol, which
2598 indicates to the C program how many bytes there are in a long.
2601 This variable is defined but not used by Configure.
2602 The value is a plain '' and is not useful.
2605 This variable is defined but not used by Configure.
2606 The value is a plain '' and is not useful.
2609 This variable is used internally by Configure to determine the
2610 full pathname (if any) of the ls program. After Configure runs,
2611 the value is reset to a plain "ls" and is not useful.
2613 lseeksize (lseektype.U):
2614 This variable defines lseektype to be something like off_t, long,
2615 or whatever type is used to declare lseek offset's type in the
2616 kernel (which also appears to be lseek's return type).
2618 lseektype (lseektype.U):
2619 This variable defines lseektype to be something like off_t, long,
2620 or whatever type is used to declare lseek offset's type in the
2621 kernel (which also appears to be lseek's return type).
2624 This variable is defined but not used by Configure.
2625 The value is a plain '' and is not useful.
2628 This variable is defined but not used by Configure.
2629 The value is a plain '' and is not useful.
2632 This variable is used internally by Configure to determine the
2633 full pathname (if any) of the make program. After Configure runs,
2634 the value is reset to a plain "make" and is not useful.
2636 make_set_make (make.U):
2637 Some versions of 'make' set the variable MAKE. Others do not.
2638 This variable contains the string to be included in Makefile.SH
2639 so that MAKE is set if needed, and not if not needed.
2640 Possible values are:
2641 make_set_make='#' # If your make program handles this for you,
2642 make_set_make="MAKE=$make" # if it doesn't.
2643 I used a comment character so that we can distinguish a
2644 'set' value (from a previous config.sh or Configure '-D' option)
2645 from an uncomputed value.
2647 mallocobj (mallocsrc.U):
2648 This variable contains the name of the malloc.o that this package
2649 generates, if that malloc.o is preferred over the system malloc.
2650 Otherwise the value is null. This variable is intended for generating
2651 Makefiles. See mallocsrc.
2653 mallocsrc (mallocsrc.U):
2654 This variable contains the name of the malloc.c that comes with
2655 the package, if that malloc.c is preferred over the system malloc.
2656 Otherwise the value is null. This variable is intended for generating
2659 malloctype (mallocsrc.U):
2660 This variable contains the kind of ptr returned by malloc and realloc.
2662 man1dir (man1dir.U):
2663 This variable contains the name of the directory in which manual
2664 source pages are to be put. It is the responsibility of the
2665 Makefile.SH to get the value of this into the proper command.
2666 You must be prepared to do the ~name expansion yourself.
2668 man1direxp (man1dir.U):
2669 This variable is the same as the man1dir variable, but is filename
2670 expanded at configuration time, for convenient use in makefiles.
2672 man1ext (man1dir.U):
2673 This variable contains the extension that the manual page should
2674 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2677 man3dir (man3dir.U):
2678 This variable contains the name of the directory in which manual
2679 source pages are to be put. It is the responsibility of the
2680 Makefile.SH to get the value of this into the proper command.
2681 You must be prepared to do the ~name expansion yourself.
2683 man3direxp (man3dir.U):
2684 This variable is the same as the man3dir variable, but is filename
2685 expanded at configuration time, for convenient use in makefiles.
2687 man3ext (man3dir.U):
2688 This variable contains the extension that the manual page should
2689 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2693 This variable is used internally by Configure to determine the
2694 full pathname (if any) of the Mcc program. After Configure runs,
2695 the value is reset to a plain "Mcc" and is not useful.
2697 mips_type (usrinc.U):
2698 This variable holds the environment type for the mips system.
2699 Possible values are "BSD 4.3" and "System V".
2702 This variable is used internally by Configure to determine the
2703 full pathname (if any) of the mkdir program. After Configure runs,
2704 the value is reset to a plain "mkdir" and is not useful.
2706 mmaptype (d_mmap.U):
2707 This symbol contains the type of pointer returned by mmap()
2708 (and simultaneously the type of the first argument).
2709 It can be 'void *' or 'caddr_t'.
2711 modetype (modetype.U):
2712 This variable defines modetype to be something like mode_t,
2713 int, unsigned short, or whatever type is used to declare file
2714 modes for system calls.
2717 This variable is used internally by Configure to determine the
2718 full pathname (if any) of the more program. After Configure runs,
2719 the value is reset to a plain "more" and is not useful.
2721 multiarch (multiarch.U):
2722 This variable conditionally defines the MULTIARCH symbol
2723 which signifies the presence of multiplatform files.
2724 This is normally set by hints files.
2727 This variable is defined but not used by Configure.
2728 The value is a plain '' and is not useful.
2730 myarchname (archname.U):
2731 This variable holds the architecture name computed by Configure in
2732 a previous run. It is not intended to be perused by any user and
2733 should never be set in a hint file.
2735 mydomain (myhostname.U):
2736 This variable contains the eventual value of the MYDOMAIN symbol,
2737 which is the domain of the host the program is going to run on.
2738 The domain must be appended to myhostname to form a complete host name.
2739 The dot comes with mydomain, and need not be supplied by the program.
2741 myhostname (myhostname.U):
2742 This variable contains the eventual value of the MYHOSTNAME symbol,
2743 which is the name of the host the program is going to run on.
2744 The domain is not kept with hostname, but must be gotten from mydomain.
2745 The dot comes with mydomain, and need not be supplied by the program.
2747 myuname (Oldconfig.U):
2748 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2749 pseudo variables assignments in the output are stripped, thank you. The
2750 whole thing is then lower-cased.
2753 This variable contains the '-n' flag if that is what causes the echo
2754 command to suppress newline. Otherwise it is null. Correct usage is
2755 $echo $n "prompt for a question: $c".
2757 need_va_copy (need_va_copy.U):
2758 This symbol, if defined, indicates that the system stores
2759 the variable argument list datatype, va_list, in a format
2760 that cannot be copied by simple assignment, so that some
2761 other means must be used when copying is required.
2762 As such systems vary in their provision (or non-provision)
2763 of copying mechanisms, handy.h defines a platform-
2764 independent macro, Perl_va_copy(src, dst), to do the job.
2766 netdb_hlen_type (netdbtype.U):
2767 This variable holds the type used for the 2nd argument to
2768 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2769 This is only useful if you have gethostbyaddr(), naturally.
2771 netdb_host_type (netdbtype.U):
2772 This variable holds the type used for the 1st argument to
2773 gethostbyaddr(). Usually, this is char * or void *, possibly
2774 with or without a const prefix.
2775 This is only useful if you have gethostbyaddr(), naturally.
2777 netdb_name_type (netdbtype.U):
2778 This variable holds the type used for the argument to
2779 gethostbyname(). Usually, this is char * or const char *.
2780 This is only useful if you have gethostbyname(), naturally.
2782 netdb_net_type (netdbtype.U):
2783 This variable holds the type used for the 1st argument to
2784 getnetbyaddr(). Usually, this is int or long.
2785 This is only useful if you have getnetbyaddr(), naturally.
2788 This variable is used internally by Configure to determine the
2789 full pathname (if any) of the nm program. After Configure runs,
2790 the value is reset to a plain "nm" and is not useful.
2793 This variable holds the options that may be necessary for nm.
2795 nm_so_opt (usenm.U):
2796 This variable holds the options that may be necessary for nm
2797 to work on a shared library but that can not be used on an
2798 archive library. Currently, this is only used by Linux, where
2799 nm --dynamic is *required* to get symbols from an ELF library which
2800 has been stripped, but nm --dynamic is *fatal* on an archive library.
2801 Maybe Linux should just always set usenm=false.
2803 nonxs_ext (Extensions.U):
2804 This variable holds a list of all non-xs extensions included
2805 in the package. All of them will be built.
2808 This variable is used internally by Configure to determine the
2809 full pathname (if any) of the nroff program. After Configure runs,
2810 the value is reset to a plain "nroff" and is not useful.
2812 nveformat (perlxvf.U):
2813 This variable contains the format string used for printing
2814 a Perl NV using %e-ish floating point format.
2816 nvEUformat (perlxvf.U):
2817 This variable contains the format string used for printing
2818 a Perl NV using %E-ish floating point format.
2820 nvfformat (perlxvf.U):
2821 This variable confains the format string used for printing
2822 a Perl NV using %f-ish floating point format.
2824 nvFUformat (perlxvf.U):
2825 This variable confains the format string used for printing
2826 a Perl NV using %F-ish floating point format.
2828 nvgformat (perlxvf.U):
2829 This variable contains the format string used for printing
2830 a Perl NV using %g-ish floating point format.
2832 nvGUformat (perlxvf.U):
2833 This variable contains the format string used for printing
2834 a Perl NV using %G-ish floating point format.
2837 This variable is the size of an NV in bytes.
2840 This variable contains the C type used for Perl's NV.
2842 o_nonblock (nblock_io.U):
2843 This variable bears the symbol value to be used during open() or fcntl()
2844 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2845 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2846 but that is only supported by some devices.
2849 This is an old synonym for _o.
2851 old_pthread_create_joinable (d_pthrattrj.U):
2852 This variable defines the constant to use for creating joinable
2853 (aka undetached) pthreads. Unused if pthread.h defines
2854 PTHREAD_CREATE_JOINABLE. If used, possible values are
2855 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2857 optimize (ccflags.U):
2858 This variable contains any optimizer/debugger flag that should be used.
2859 It is up to the Makefile to use it.
2861 orderlib (orderlib.U):
2862 This variable is "true" if the components of libraries must be ordered
2863 (with `lorder $* | tsort`) before placing them in an archive. Set to
2864 "false" if ranlib or ar can generate random libraries.
2866 osname (Oldconfig.U):
2867 This variable contains the operating system name (e.g. sunos,
2868 solaris, hpux, etc.). It can be useful later on for setting
2869 defaults. Any spaces are replaced with underscores. It is set
2870 to a null string if we can't figure it out.
2872 osvers (Oldconfig.U):
2873 This variable contains the operating system version (e.g.
2874 4.1.3, 5.2, etc.). It is primarily used for helping select
2875 an appropriate hints file, but might be useful elsewhere for
2876 setting defaults. It is set to '' if we can't figure it out.
2877 We try to be flexible about how much of the version number
2878 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2879 same for this package, hints files might just be os_4.0 or
2880 os_4.1, etc., not keeping separate files for each little release.
2882 otherlibdirs (otherlibdirs.U):
2883 This variable contains a colon-separated set of paths for the perl
2884 binary to search for additional library files or modules.
2885 These directories will be tacked to the end of @INC.
2886 Perl will automatically search below each path for version-
2887 and architecture-specific directories. See inc_version_list
2889 A value of ' ' means 'none' and is used to preserve this value
2890 for the next run through Configure.
2892 package (package.U):
2893 This variable contains the name of the package being constructed.
2894 It is primarily intended for the use of later Configure units.
2897 This variable contains the name of the preferred pager on the system.
2898 Usual values are (the full pathnames of) more, less, pg, or cat.
2901 This variable contains a command that produces the text of the
2902 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2903 "ypcat passwd" when NIS is used.
2904 On some systems, such as os390, there may be no equivalent
2905 command, in which case this variable is unset.
2907 patchlevel (patchlevel.U):
2908 The patchlevel level of this package.
2909 The value of patchlevel comes from the patchlevel.h file.
2910 In a version number such as 5.6.1, this is the "6".
2911 In patchlevel.h, this is referred to as "PERL_VERSION".
2914 This is an old synonym for p_ in Head.U, the character
2915 used to separate elements in the command shell search PATH.
2918 This variable contains the full path (if any) to a previously
2919 installed perl5.005 or later suitable for running the script
2920 to determine inc_version_list.
2923 This variable is defined but not used by Configure.
2924 The value is a plain '' and is not useful.
2926 PERL_REVISION (Oldsyms.U):
2927 In a Perl version number such as 5.6.2, this is the 5.
2928 This value is manually set in patchlevel.h
2930 PERL_SUBVERSION (Oldsyms.U):
2931 In a Perl version number such as 5.6.2, this is the 2.
2932 Values greater than 50 represent potentially unstable
2933 development subversions.
2934 This value is manually set in patchlevel.h
2936 PERL_VERSION (Oldsyms.U):
2937 In a Perl version number such as 5.6.2, this is the 6.
2938 This value is manually set in patchlevel.h
2940 perladmin (perladmin.U):
2941 Electronic mail address of the perl5 administrator.
2944 The list of libraries needed by Perl only (any libraries needed
2945 by extensions only will by dropped, if using dynamic loading).
2947 perlpath (perlpath.U):
2948 This variable contains the eventual value of the PERLPATH symbol,
2949 which contains the name of the perl interpreter to be used in
2950 shell scripts and in the "eval 'exec'" idiom.
2953 This variable is used internally by Configure to determine the
2954 full pathname (if any) of the pg program. After Configure runs,
2955 the value is reset to a plain "pg" and is not useful.
2957 phostname (myhostname.U):
2958 This variable contains the eventual value of the PHOSTNAME symbol,
2959 which is a command that can be fed to popen() to get the host name.
2960 The program should probably not presume that the domain is or isn't
2963 pidtype (pidtype.U):
2964 This variable defines PIDTYPE to be something like pid_t, int,
2965 ushort, or whatever type is used to declare process ids in the kernel.
2968 Holds the private path used by Configure to find out the libraries.
2969 Its value is prepend to libpth. This variable takes care of special
2970 machines, like the mips. Usually, it should be empty.
2972 pm_apiversion (xs_apiversion.U):
2973 This variable contains the version of the oldest perl
2974 compatible with the present perl. (That is, pure perl modules
2975 written for $pm_apiversion will still work for the current
2976 version). perl.c:incpush() and lib/lib.pm will automatically
2977 search in $sitelib for older directories across major versions
2978 back to pm_apiversion. This is only useful if you have a perl
2979 library directory tree structured like the default one. The
2980 versioned site_perl library was introduced in 5.005, so that's
2981 the default setting for this variable. It's hard to imagine
2982 it changing before Perl6. It is included here for symmetry
2983 with xs_apiveprsion -- the searching algorithms will
2984 (presumably) be similar.
2985 See the INSTALL file for how this works.
2988 This variable is defined but not used by Configure.
2989 The value is a plain '' and is not useful.
2992 This variable is defined but not used by Configure.
2993 The value is a plain '' and is not useful.
2996 This variable holds the name of the directory below which the
2997 user will install the package. Usually, this is /usr/local, and
2998 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2999 man pages in /usr/local/man, etc. It is only used to set defaults
3000 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3002 prefixexp (prefix.U):
3003 This variable holds the full absolute path of the directory below
3004 which the user will install the package. Derived from prefix.
3006 privlib (privlib.U):
3007 This variable contains the eventual value of the PRIVLIB symbol,
3008 which is the name of the private library for this package. It may
3009 have a ~ on the front. It is up to the makefile to eventually create
3010 this directory while performing installation (with ~ substitution).
3012 privlibexp (privlib.U):
3013 This variable is the ~name expanded version of privlib, so that you
3014 may use it directly in Makefiles or shell scripts.
3016 prototype (prototype.U):
3017 This variable holds the eventual value of CAN_PROTOTYPE, which
3018 indicates the C compiler can handle funciton prototypes.
3020 ptrsize (ptrsize.U):
3021 This variable contains the value of the PTRSIZE symbol, which
3022 indicates to the C program how many bytes there are in a pointer.
3024 quadkind (quadtype.U):
3025 This variable, if defined, encodes the type of a quad:
3026 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3028 quadtype (quadtype.U):
3029 This variable defines Quad_t to be something like long, int,
3030 long long, int64_t, or whatever type is used for 64-bit integers.
3032 randbits (randfunc.U):
3033 Indicates how many bits are produced by the function used to
3034 generate normalized random numbers.
3036 randfunc (randfunc.U):
3037 Indicates the name of the random number function to use.
3038 Values include drand48, random, and rand. In C programs,
3039 the 'Drand01' macro is defined to generate uniformly distributed
3040 random numbers over the range [0., 1.[ (see drand01 and nrand).
3042 randseedtype (randfunc.U):
3043 Indicates the type of the argument of the seedfunc.
3045 ranlib (orderlib.U):
3046 This variable is set to the pathname of the ranlib program, if it is
3047 needed to generate random libraries. Set to ":" if ar can generate
3048 random libraries or if random libraries are not supported
3050 rd_nodata (nblock_io.U):
3051 This variable holds the return code from read() when no data is
3052 present. It should be -1, but some systems return 0 when O_NDELAY is
3053 used, which is a shame because you cannot make the difference between
3054 no data and an EOF.. Sigh!
3056 revision (patchlevel.U):
3057 The value of revision comes from the patchlevel.h file.
3058 In a version number such as 5.6.1, this is the "5".
3059 In patchlevel.h, this is referred to as "PERL_REVISION".
3062 This variable is used internally by Configure to determine the
3063 full pathname (if any) of the rm program. After Configure runs,
3064 the value is reset to a plain "rm" and is not useful.
3067 This variable is defined but not used by Configure.
3068 The value is a plain '' and is not useful.
3071 This variable contains 'true' or 'false' depending whether the
3072 nm extraction should be performed or not, according to the value
3073 of usenm and the flags on the Configure command line.
3075 sched_yield (d_pthread_y.U):
3076 This variable defines the way to yield the execution
3077 of the current thread.
3079 scriptdir (scriptdir.U):
3080 This variable holds the name of the directory in which the user wants
3081 to put publicly scripts for the package in question. It is either
3082 the same directory as for binaries, or a special one that can be
3083 mounted across different architectures, like /usr/share. Programs
3084 must be prepared to deal with ~name expansion.
3086 scriptdirexp (scriptdir.U):
3087 This variable is the same as scriptdir, but is filename expanded
3088 at configuration time, for programs not wanting to bother with it.
3091 This variable is used internally by Configure to determine the
3092 full pathname (if any) of the sed program. After Configure runs,
3093 the value is reset to a plain "sed" and is not useful.
3095 seedfunc (randfunc.U):
3096 Indicates the random number generating seed function.
3097 Values include srand48, srandom, and srand.
3099 selectminbits (selectminbits.U):
3100 This variable holds the minimum number of bits operated by select.
3101 That is, if you do select(n, ...), how many bits at least will be
3102 cleared in the masks if some activity is detected. Usually this
3103 is either n or 32*ceil(n/32), especially many little-endians do
3104 the latter. This is only useful if you have select(), naturally.
3106 selecttype (selecttype.U):
3107 This variable holds the type used for the 2nd, 3rd, and 4th
3108 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3109 is defined, and 'int *' otherwise. This is only useful if you
3110 have select(), naturally.
3113 This variable is defined but not used by Configure.
3114 The value is a plain '' and is not useful.
3117 This variable contains the full pathname of the shell used
3118 on this system to execute Bourne shell scripts. Usually, this will be
3119 /bin/sh, though it's possible that some systems will have /bin/ksh,
3120 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3122 This unit comes before Options.U, so you can't set sh with a '-D'
3123 option, though you can override this (and startsh)
3124 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3127 This variable is defined but not used by Configure.
3128 The value is a plain '' and is not useful.
3130 sharpbang (spitshell.U):
3131 This variable contains the string #! if this system supports that
3134 shmattype (d_shmat.U):
3135 This symbol contains the type of pointer returned by shmat().
3136 It can be 'void *' or 'char *'.
3138 shortsize (intsize.U):
3139 This variable contains the value of the SHORTSIZE symbol which
3140 indicates to the C program how many bytes there are in a short.
3142 shrpenv (libperl.U):
3143 If the user builds a shared libperl.so, then we need to tell the
3144 'perl' executable where it will be able to find the installed libperl.so.
3145 One way to do this on some systems is to set the environment variable
3146 LD_RUN_PATH to the directory that will be the final location of the
3147 shared libperl.so. The makefile can use this with something like
3148 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3150 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3153 See the main perl Makefile.SH for actual working usage.
3154 Alternatively, we might be able to use a command line option such
3155 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3156 $archlibexp/CORE (Linux).
3158 shsharp (spitshell.U):
3159 This variable tells further Configure units whether your sh can
3162 sig_count (sig_name.U):
3163 This variable holds a number larger than the largest valid
3164 signal number. This is usually the same as the NSIG macro.
3166 sig_name (sig_name.U):
3167 This variable holds the signal names, space separated. The leading
3168 SIG in signal name is removed. A ZERO is prepended to the
3169 list. This is currently not used.
3171 sig_name_init (sig_name.U):
3172 This variable holds the signal names, enclosed in double quotes and
3173 separated by commas, suitable for use in the SIG_NAME definition
3174 below. A "ZERO" is prepended to the list, and the list is
3175 terminated with a plain 0. The leading SIG in signal names
3176 is removed. See sig_num.
3178 sig_num (sig_name.U):
3179 This variable holds the signal numbers, space separated. A ZERO is
3180 prepended to the list (corresponding to the fake SIGZERO), and
3181 the list is terminated with a 0. Those numbers correspond to
3182 the value of the signal listed in the same place within the
3185 sig_num_init (sig_name.U):
3186 This variable holds the signal numbers, enclosed in double quotes and
3187 separated by commas, suitable for use in the SIG_NUM definition
3188 below. A "ZERO" is prepended to the list, and the list is
3189 terminated with a plain 0.
3191 sig_size (sig_name.U):
3192 This variable contains the number of elements of the sig_name
3193 and sig_num arrays, excluding the final NULL entry.
3195 signal_t (d_voidsig.U):
3196 This variable holds the type of the signal handler (void or int).
3198 sitearch (sitearch.U):
3199 This variable contains the eventual value of the SITEARCH symbol,
3200 which is the name of the private library for this package. It may
3201 have a ~ on the front. It is up to the makefile to eventually create
3202 this directory while performing installation (with ~ substitution).
3203 The standard distribution will put nothing in this directory.
3204 After perl has been installed, users may install their own local
3205 architecture-dependent modules in this directory with
3206 MakeMaker Makefile.PL
3207 or equivalent. See INSTALL for details.
3209 sitearchexp (sitearch.U):
3210 This variable is the ~name expanded version of sitearch, so that you
3211 may use it directly in Makefiles or shell scripts.
3213 sitebin (sitebin.U):
3214 This variable holds the name of the directory in which the user wants
3215 to put add-on publicly executable files for the package in question. It
3216 is most often a local directory such as /usr/local/bin. Programs using
3217 this variable must be prepared to deal with ~name substitution.
3218 The standard distribution will put nothing in this directory.
3219 After perl has been installed, users may install their own local
3220 executables in this directory with
3221 MakeMaker Makefile.PL
3222 or equivalent. See INSTALL for details.
3224 sitebinexp (sitebin.U):
3225 This is the same as the sitebin variable, but is filename expanded at
3226 configuration time, for use in your makefiles.
3228 sitelib (sitelib.U):
3229 This variable contains the eventual value of the SITELIB symbol,
3230 which is the name of the private library for this package. It may
3231 have a ~ on the front. It is up to the makefile to eventually create
3232 this directory while performing installation (with ~ substitution).
3233 The standard distribution will put nothing in this directory.
3234 After perl has been installed, users may install their own local
3235 architecture-independent modules in this directory with
3236 MakeMaker Makefile.PL
3237 or equivalent. See INSTALL for details.
3239 sitelib_stem (sitelib.U):
3240 This variable is $sitelibexp with any trailing version-specific component
3241 removed. The elements in inc_version_list (inc_version_list.U) can
3242 be tacked onto this variable to generate a list of directories to search.
3244 sitelibexp (sitelib.U):
3245 This variable is the ~name expanded version of sitelib, so that you
3246 may use it directly in Makefiles or shell scripts.
3248 siteprefix (siteprefix.U):
3249 This variable holds the full absolute path of the directory below
3250 which the user will install add-on packages.
3251 See INSTALL for usage and examples.
3253 siteprefixexp (siteprefix.U):
3254 This variable holds the full absolute path of the directory below
3255 which the user will install add-on packages. Derived from siteprefix.
3257 sizesize (sizesize.U):
3258 This variable contains the size of a sizetype in bytes.
3260 sizetype (sizetype.U):
3261 This variable defines sizetype to be something like size_t,
3262 unsigned long, or whatever type is used to declare length
3263 parameters for string functions.
3266 This variable is defined but not used by Configure.
3267 The value is a plain '' and is not useful.
3270 This variable is defined but not used by Configure.
3271 The value is a plain '' and is not useful.
3274 This variable holds the extension used to identify shared libraries
3275 (also known as shared objects) on the system. Usually set to 'so'.
3277 sockethdr (d_socket.U):
3278 This variable has any cpp '-I' flags needed for socket support.
3280 socketlib (d_socket.U):
3281 This variable has the names of any libraries needed for socket support.
3283 socksizetype (socksizetype.U):
3284 This variable holds the type used for the size argument
3285 for various socket calls like accept. Usual values include
3286 socklen_t, size_t, and int.
3289 This variable is used internally by Configure to determine the
3290 full pathname (if any) of the sort program. After Configure runs,
3291 the value is reset to a plain "sort" and is not useful.
3293 spackage (package.U):
3294 This variable contains the name of the package being constructed,
3295 with the first letter uppercased, i.e. suitable for starting
3298 spitshell (spitshell.U):
3299 This variable contains the command necessary to spit out a runnable
3300 shell on this system. It is either cat or a grep '-v' for # comments.
3302 sPRId64 (quadfio.U):
3303 This variable, if defined, contains the string used by stdio to
3304 format 64-bit decimal numbers (format 'd') for output.
3306 sPRIeldbl (longdblfio.U):
3307 This variable, if defined, contains the string used by stdio to
3308 format long doubles (format 'e') for output.
3310 sPRIEUldbl (longdblfio.U):
3311 This variable, if defined, contains the string used by stdio to
3312 format long doubles (format 'E') for output.
3313 The 'U' in the name is to separate this from sPRIeldbl so that even
3314 case-blind systems can see the difference.
3316 sPRIfldbl (longdblfio.U):
3317 This variable, if defined, contains the string used by stdio to
3318 format long doubles (format 'f') for output.
3320 sPRIFUldbl (longdblfio.U):
3321 This variable, if defined, contains the string used by stdio to
3322 format long doubles (format 'F') for output.
3323 The 'U' in the name is to separate this from sPRIfldbl so that even
3324 case-blind systems can see the difference.
3326 sPRIgldbl (longdblfio.U):
3327 This variable, if defined, contains the string used by stdio to
3328 format long doubles (format 'g') for output.
3330 sPRIGUldbl (longdblfio.U):
3331 This variable, if defined, contains the string used by stdio to
3332 format long doubles (format 'G') for output.
3333 The 'U' in the name is to separate this from sPRIgldbl so that even
3334 case-blind systems can see the difference.
3336 sPRIi64 (quadfio.U):
3337 This variable, if defined, contains the string used by stdio to
3338 format 64-bit decimal numbers (format 'i') for output.
3340 sPRIo64 (quadfio.U):
3341 This variable, if defined, contains the string used by stdio to
3342 format 64-bit octal numbers (format 'o') for output.
3344 sPRIu64 (quadfio.U):
3345 This variable, if defined, contains the string used by stdio to
3346 format 64-bit unsigned decimal numbers (format 'u') for output.
3348 sPRIx64 (quadfio.U):
3349 This variable, if defined, contains the string used by stdio to
3350 format 64-bit hexadecimal numbers (format 'x') for output.
3352 sPRIXU64 (quadfio.U):
3353 This variable, if defined, contains the string used by stdio to
3354 format 64-bit hExADECimAl numbers (format 'X') for output.
3355 The 'U' in the name is to separate this from sPRIx64 so that even
3356 case-blind systems can see the difference.
3359 This variable holds the path to the package source. It is up to
3360 the Makefile to use this variable and set VPATH accordingly to
3361 find the sources remotely.
3363 sSCNfldbl (longdblfio.U):
3364 This variable, if defined, contains the string used by stdio to
3365 format long doubles (format 'f') for input.
3367 ssizetype (ssizetype.U):
3368 This variable defines ssizetype to be something like ssize_t,
3369 long or int. It is used by functions that return a count
3370 of bytes or an error condition. It must be a signed type.
3371 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3373 startperl (startperl.U):
3374 This variable contains the string to put on the front of a perl
3375 script to make sure (hopefully) that it runs with perl and not some
3376 shell. Of course, that leading line must be followed by the classical
3378 eval 'exec perl -S $0 ${1+"$@"}'
3379 if $running_under_some_shell;
3380 to guarantee perl startup should the shell execute the script. Note
3381 that this magic incatation is not understood by csh.
3383 startsh (startsh.U):
3384 This variable contains the string to put on the front of a shell
3385 script to make sure (hopefully) that it runs with sh and not some
3388 static_ext (Extensions.U):
3389 This variable holds a list of XS extension files we want to
3390 link statically into the package. It is used by Makefile.
3392 stdchar (stdchar.U):
3393 This variable conditionally defines STDCHAR to be the type of char
3394 used in stdio.h. It has the values "unsigned char" or "char".
3396 stdio_base (d_stdstdio.U):
3397 This variable defines how, given a FILE pointer, fp, to access the
3398 _base field (or equivalent) of stdio.h's FILE structure. This will
3399 be used to define the macro FILE_base(fp).
3401 stdio_bufsiz (d_stdstdio.U):
3402 This variable defines how, given a FILE pointer, fp, to determine
3403 the number of bytes store in the I/O buffer pointer to by the
3404 _base field (or equivalent) of stdio.h's FILE structure. This will
3405 be used to define the macro FILE_bufsiz(fp).
3407 stdio_cnt (d_stdstdio.U):
3408 This variable defines how, given a FILE pointer, fp, to access the
3409 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3410 be used to define the macro FILE_cnt(fp).
3412 stdio_filbuf (d_stdstdio.U):
3413 This variable defines how, given a FILE pointer, fp, to tell
3414 stdio to refill it's internal buffers (?). This will
3415 be used to define the macro FILE_filbuf(fp).
3417 stdio_ptr (d_stdstdio.U):
3418 This variable defines how, given a FILE pointer, fp, to access the
3419 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3420 be used to define the macro FILE_ptr(fp).
3422 stdio_stream_array (stdio_streams.U):
3423 This variable tells the name of the array holding the stdio streams.
3424 Usual values include _iob, __iob, and __sF.
3426 strings (i_string.U):
3427 This variable holds the full path of the string header that will be
3428 used. Typically /usr/include/string.h or /usr/include/strings.h.
3431 This variable is defined but not used by Configure.
3432 The value is a plain '' and is not useful.
3434 subversion (patchlevel.U):
3435 The subversion level of this package.
3436 The value of subversion comes from the patchlevel.h file.
3437 In a version number such as 5.6.1, this is the "1".
3438 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3439 This is unique to perl.
3442 This variable holds the place where the manual is located on this
3443 system. It is not the place where the user wants to put his manual
3444 pages. Rather it is the place where Configure may look to find manual
3445 for unix commands (section 1 of the manual usually). See mansrc.
3448 This variable is defined but not used by Configure.
3449 The value is a plain '' and is not useful.
3452 This variable is defined but not used by Configure.
3453 The value is a plain '' and is not useful.
3456 This variable is defined but not used by Configure.
3457 The value is a plain '' and is not useful.
3460 This variable is defined but not used by Configure.
3461 The value is a plain '' and is not useful.
3464 This variable is used internally by Configure to determine the
3465 full pathname (if any) of the test program. After Configure runs,
3466 the value is reset to a plain "test" and is not useful.
3468 timeincl (i_time.U):
3469 This variable holds the full path of the included time header(s).
3471 timetype (d_time.U):
3472 This variable holds the type returned by time(). It can be long,
3473 or time_t on BSD sites (in which case <sys/types.h> should be
3474 included). Anyway, the type Time_t should be used.
3477 This variable is used internally by Configure to determine the
3478 full pathname (if any) of the touch program. After Configure runs,
3479 the value is reset to a plain "touch" and is not useful.
3482 This variable is used internally by Configure to determine the
3483 full pathname (if any) of the tr program. After Configure runs,
3484 the value is reset to a plain "tr" and is not useful.
3487 This variable contains the value to be passed to the tr(1)
3488 command to transliterate a newline. Typical values are
3489 '\012' and '\n'. This is needed for EBCDIC systems where
3490 newline is not necessarily '\012'.
3493 This variable is defined but not used by Configure.
3494 The value is a plain '' and is not useful.
3497 This variable is the size of an U16 in bytes.
3500 This variable contains the C type used for Perl's U16.
3503 This variable is the size of an U32 in bytes.
3506 This variable contains the C type used for Perl's U32.
3509 This variable is the size of an U64 in bytes.
3512 This variable contains the C type used for Perl's U64.
3515 This variable is the size of an U8 in bytes.
3518 This variable contains the C type used for Perl's U8.
3521 This variable contains the format string used for printing a Uid_t.
3523 uidsign (uidsign.U):
3524 This variable contains the signedness of a uidtype.
3525 1 for unsigned, -1 for signed.
3527 uidsize (uidsize.U):
3528 This variable contains the size of a uidtype in bytes.
3530 uidtype (uidtype.U):
3531 This variable defines Uid_t to be something like uid_t, int,
3532 ushort, or whatever type is used to declare user ids in the kernel.
3535 This variable is used internally by Configure to determine the
3536 full pathname (if any) of the uname program. After Configure runs,
3537 the value is reset to a plain "uname" and is not useful.
3540 This variable is used internally by Configure to determine the
3541 full pathname (if any) of the uniq program. After Configure runs,
3542 the value is reset to a plain "uniq" and is not useful.
3544 uquadtype (quadtype.U):
3545 This variable defines Uquad_t to be something like unsigned long,
3546 unsigned int, unsigned long long, uint64_t, or whatever type is
3547 used for 64-bit integers.
3549 use5005threads (usethreads.U):
3550 This variable conditionally defines the USE_5005THREADS symbol,
3551 and indicates that Perl should be built to use the 5.005-based
3552 threading implementation.
3554 use64bitall (use64bits.U):
3555 This variable conditionally defines the USE_64_BIT_ALL symbol,
3556 and indicates that 64-bit integer types should be used
3557 when available. The maximal possible
3558 64-bitness is employed: LP64 or ILP64, meaning that you will
3559 be able to use more than 2 gigabytes of memory. This mode is
3560 even more binary incompatible than USE_64_BIT_INT. You may not
3561 be able to run the resulting executable in a 32-bit CPU at all or
3562 you may need at least to reboot your OS to 64-bit mode.
3564 use64bitint (use64bits.U):
3565 This variable conditionally defines the USE_64_BIT_INT symbol,
3566 and indicates that 64-bit integer types should be used
3567 when available. The minimal possible 64-bitness
3568 is employed, just enough to get 64-bit integers into Perl.
3569 This may mean using for example "long longs", while your memory
3570 may still be limited to 2 gigabytes.
3573 This variable indicates if the system supports dynamic
3574 loading of some sort. See also dlsrc and dlobj.
3576 useithreads (usethreads.U):
3577 This variable conditionally defines the USE_ITHREADS symbol,
3578 and indicates that Perl should be built to use the interpreter-based
3579 threading implementation.
3581 uselargefiles (uselfs.U):
3582 This variable conditionally defines the USE_LARGE_FILES symbol,
3583 and indicates that large file interfaces should be used when
3586 uselongdouble (uselongdbl.U):
3587 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3588 and indicates that long doubles should be used when available.
3590 usemorebits (usemorebits.U):
3591 This variable conditionally defines the USE_MORE_BITS symbol,
3592 and indicates that explicit 64-bit interfaces and long doubles
3593 should be used when available.
3595 usemultiplicity (usemultiplicity.U):
3596 This variable conditionally defines the MULTIPLICITY symbol,
3597 and indicates that Perl should be built to use multiplicity.
3599 usemymalloc (mallocsrc.U):
3600 This variable contains y if the malloc that comes with this package
3601 is desired over the system's version of malloc. People often include
3602 special versions of malloc for effiency, but such versions are often
3603 less portable. See also mallocsrc and mallocobj.
3604 If this is 'y', then -lmalloc is removed from $libs.
3607 This variable contains 'true' or 'false' depending whether the
3608 nm extraction is wanted or not.
3610 useopcode (Extensions.U):
3611 This variable holds either 'true' or 'false' to indicate
3612 whether the Opcode extension should be used. The sole
3613 use for this currently is to allow an easy mechanism
3614 for users to skip the Opcode extension from the Configure
3617 useperlio (useperlio.U):
3618 This variable conditionally defines the USE_PERLIO symbol,
3619 and indicates that the PerlIO abstraction should be
3622 useposix (Extensions.U):
3623 This variable holds either 'true' or 'false' to indicate
3624 whether the POSIX extension should be used. The sole
3625 use for this currently is to allow an easy mechanism
3626 for hints files to indicate that POSIX will not compile
3627 on a particular system.
3630 This variable is set to true when the user agrees to use sfio.
3631 It is set to false when sfio is not available or when the user
3632 explicitely requests not to use sfio. It is here primarily so
3633 that command-line settings can override the auto-detection of
3634 d_sfio without running into a "WHOA THERE".
3636 useshrplib (libperl.U):
3637 This variable is set to 'yes' if the user wishes
3638 to build a shared libperl, and 'no' otherwise.
3640 usesocks (usesocks.U):
3641 This variable conditionally defines the USE_SOCKS symbol,
3642 and indicates that Perl should be built to use SOCKS.
3644 usethreads (usethreads.U):
3645 This variable conditionally defines the USE_THREADS symbol,
3646 and indicates that Perl should be built to use threads.
3648 usevendorprefix (vendorprefix.U):
3649 This variable tells whether the vendorprefix
3650 and consequently other vendor* paths are in use.
3652 usevfork (d_vfork.U):
3653 This variable is set to true when the user accepts to use vfork.
3654 It is set to false when no vfork is available or when the user
3655 explicitely requests not to use vfork.
3658 This variable holds the path of the include files, which is
3659 usually /usr/include. It is mainly used by other Configure units.
3662 This variable is defined but not used by Configure.
3663 The value is a plain '' and is not useful.
3665 uvoformat (perlxvf.U):
3666 This variable contains the format string used for printing
3667 a Perl UV as an unsigned octal integer.
3670 This variable is the size of a UV in bytes.
3673 This variable contains the C type used for Perl's UV.
3675 uvuformat (perlxvf.U):
3676 This variable contains the format string used for printing
3677 a Perl UV as an unsigned decimal integer.
3679 uvxformat (perlxvf.U):
3680 This variable contains the format string used for printing
3681 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3683 uvXUformat (perlxvf.U):
3684 This variable contains the format string used for printing
3685 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3687 vendorarch (vendorarch.U):
3688 This variable contains the value of the PERL_VENDORARCH symbol.
3689 It may have a ~ on the front.
3690 The standard distribution will put nothing in this directory.
3691 Vendors who distribute perl may wish to place their own
3692 architecture-dependent modules and extensions in this directory with
3693 MakeMaker Makefile.PL INSTALLDIRS=vendor
3694 or equivalent. See INSTALL for details.
3696 vendorarchexp (vendorarch.U):
3697 This variable is the ~name expanded version of vendorarch, so that you
3698 may use it directly in Makefiles or shell scripts.
3700 vendorbin (vendorbin.U):
3701 This variable contains the eventual value of the VENDORBIN symbol.
3702 It may have a ~ on the front.
3703 The standard distribution will put nothing in this directory.
3704 Vendors who distribute perl may wish to place additional
3705 binaries in this directory with
3706 MakeMaker Makefile.PL INSTALLDIRS=vendor
3707 or equivalent. See INSTALL for details.
3709 vendorbinexp (vendorbin.U):
3710 This variable is the ~name expanded version of vendorbin, so that you
3711 may use it directly in Makefiles or shell scripts.
3713 vendorlib (vendorlib.U):
3714 This variable contains the eventual value of the VENDORLIB symbol,
3715 which is the name of the private library for this package.
3716 The standard distribution will put nothing in this directory.
3717 Vendors who distribute perl may wish to place their own
3718 modules in this directory with
3719 MakeMaker Makefile.PL INSTALLDIRS=vendor
3720 or equivalent. See INSTALL for details.
3722 vendorlib_stem (vendorlib.U):
3723 This variable is $vendorlibexp with any trailing version-specific component
3724 removed. The elements in inc_version_list (inc_version_list.U) can
3725 be tacked onto this variable to generate a list of directories to search.
3727 vendorlibexp (vendorlib.U):
3728 This variable is the ~name expanded version of vendorlib, so that you
3729 may use it directly in Makefiles or shell scripts.
3731 vendorprefix (vendorprefix.U):
3732 This variable holds the full absolute path of the directory below
3733 which the vendor will install add-on packages.
3734 See INSTALL for usage and examples.
3736 vendorprefixexp (vendorprefix.U):
3737 This variable holds the full absolute path of the directory below
3738 which the vendor will install add-on packages. Derived from vendorprefix.
3740 version (patchlevel.U):
3741 The full version number of this package, such as 5.6.1 (or 5_6_1).
3742 This combines revision, patchlevel, and subversion to get the
3743 full version number, including any possible subversions.
3744 This is suitable for use as a directory name, and hence is
3745 filesystem dependent.
3747 versiononly (versiononly.U):
3748 If set, this symbol indicates that only the version-specific
3749 components of a perl installation should be installed.
3750 This may be useful for making a test installation of a new
3751 version without disturbing the existing installation.
3752 Setting versiononly is equivalent to setting installperl's -v option.
3753 In particular, the non-versioned scripts and programs such as
3754 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3755 (see INSTALL for a more complete list). Nor are the man
3757 Usually, this is undef.
3760 This variable is defined but not used by Configure.
3761 The value is a plain '' and is not useful.
3763 voidflags (voidflags.U):
3764 This variable contains the eventual value of the VOIDFLAGS symbol,
3765 which indicates how much support of the void type is given by this
3766 compiler. See VOIDFLAGS for more info.
3769 This variable holds extra path (space-separated) used to find
3770 libraries on this platform, for example CPU-specific libraries
3771 (on multi-CPU platforms) may be listed here.
3773 xs_apiversion (xs_apiversion.U):
3774 This variable contains the version of the oldest perl binary
3775 compatible with the present perl. perl.c:incpush() and
3776 lib/lib.pm will automatically search in $sitearch for older
3777 directories across major versions back to xs_apiversion.
3778 This is only useful if you have a perl library directory tree
3779 structured like the default one.
3780 See INSTALL for how this works.
3781 The versioned site_perl directory was introduced in 5.005,
3782 so that is the lowest possible value.
3783 Since this can depend on compile time options (such as
3784 bincompat) it is set by Configure. Other non-default sources
3785 of potential incompatibility, such as multiplicity, threads,
3786 debugging, 64bits, sfio, etc., are not checked for currently,
3787 though in principle we could go snooping around in old
3791 This variable is defined but not used by Configure.
3792 The value is a plain '' and is not useful.
3795 This variable is used internally by Configure to determine the
3796 full pathname (if any) of the zip program. After Configure runs,
3797 the value is reset to a plain "zip" and is not useful.