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 Perl 5.006 should be binary-compatible
138 This is the same as the bin variable, but is filename expanded at
139 configuration time, for use in your makefiles.
142 This variable is defined but not used by Configure.
143 The value is a plain '' and is not useful.
146 This variable is used internally by Configure to determine the
147 full pathname (if any) of the byacc program. After Configure runs,
148 the value is reset to a plain "byacc" and is not useful.
150 byteorder (byteorder.U):
151 This variable holds the byte order. In the following, larger digits
152 indicate more significance. The variable byteorder is either 4321
153 on a big-endian machine, or 1234 on a little-endian, or 87654321
154 on a Cray ... or 3412 with weird order !
157 This variable contains the \c string if that is what causes the echo
158 command to suppress newline. Otherwise it is null. Correct usage is
159 $echo $n "prompt for a question: $c".
161 castflags (d_castneg.U):
162 This variable contains a flag that precise difficulties the
163 compiler has casting odd floating values to unsigned long:
165 1 = couldn't cast < 0
166 2 = couldn't cast >= 0x80000000
167 4 = couldn't cast in argument expression list
170 This variable is used internally by Configure to determine the
171 full pathname (if any) of the cat program. After Configure runs,
172 the value is reset to a plain "cat" and is not useful.
175 This variable holds the name of a command to execute a C compiler which
176 can resolve multiple global references that happen to have the same
177 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
179 cccdlflags (dlsrc.U):
180 This variable contains any special flags that might need to be
181 passed with 'cc -c' to compile modules to be used to create a shared
182 library that will be used for dynamic loading. For hpux, this
183 should be +z. It is up to the makefile to use it.
186 This variable contains any special flags that might need to be
187 passed to cc to link with a shared library for dynamic loading.
188 It is up to the makefile to use it. For sunos 4.1, it should
192 This variable contains any additional C compiler flags desired by
193 the user. It is up to the Makefile to use this.
195 ccsymbols (Cppsym.U):
196 The variable contains the symbols defined by the C compiler alone.
197 The list is a space-separated list of symbol=value tokens.
200 Login name of the person who ran the Configure script and answered the
201 questions. This is used to tag both config.sh and config_h.SH.
203 cf_email (cf_email.U):
204 Electronic mail address of the person who ran Configure. This can be
205 used by units that require the user's e-mail, like MailList.U.
208 Holds the output of the "date" command when the configuration file was
209 produced. This is used to tag both config.sh and config_h.SH.
211 charsize (charsize.U):
212 This variable contains the value of the CHARSIZE symbol, which
213 indicates to the C program how many bytes there are in a character.
216 This variable is defined but not used by Configure.
217 The value is a plain '' and is not useful.
220 This variable is defined but not used by Configure.
221 The value is a plain '' and is not useful.
224 This variable is defined but not used by Configure.
225 The value is a plain '' and is not useful.
227 clocktype (d_times.U):
228 This variable holds the type returned by times(). It can be long,
229 or clock_t on BSD sites (in which case <sys/types.h> should be
233 This variable is used internally by Configure to determine the
234 full pathname (if any) of the comm program. After Configure runs,
235 the value is reset to a plain "comm" and is not useful.
238 This variable is defined but not used by Configure.
239 The value is a plain '' and is not useful.
241 CONFIGDOTSH (Oldsyms.U):
242 This is set to 'true' in config.sh so that a shell script
243 sourcing config.sh can tell if it has been sourced already.
245 contains (contains.U):
246 This variable holds the command to do a grep with a proper return
247 status. On most sane systems it is simply "grep". On insane systems
248 it is a grep followed by a cat followed by a test. This variable
249 is primarily for the use of other Configure units.
252 This variable is used internally by Configure to determine the
253 full pathname (if any) of the cp program. After Configure runs,
254 the value is reset to a plain "cp" and is not useful.
257 This variable is defined but not used by Configure.
258 The value is a plain '' and is not useful.
261 This variable is used internally by Configure to determine the
262 full pathname (if any) of the cpp program. After Configure runs,
263 the value is reset to a plain "cpp" and is not useful.
265 cpp_stuff (cpp_stuff.U):
266 This variable contains an identification of the catenation mechanism
267 used by the C preprocessor.
269 cppccsymbols (Cppsym.U):
270 The variable contains the symbols defined by both
271 the bare C compiler and during a compilation that
273 The list is a space-separated list of symbol=value tokens.
275 cppflags (ccflags.U):
276 This variable holds the flags that will be passed to the C pre-
277 processor. It is up to the Makefile to use it.
279 cpplast (cppstdin.U):
280 This variable has the same functionality as cppminus, only it applies
281 to cpprun and not cppstdin.
283 cppminus (cppstdin.U):
284 This variable contains the second part of the string which will invoke
285 the C preprocessor on the standard input and produce to standard
286 output. This variable will have the value "-" if cppstdin needs
287 a minus to specify standard input, otherwise the value is "".
290 This variable contains the command which will invoke a C preprocessor
291 on standard input and put the output to stdout. It is guaranteed not
292 to be a wrapper and may be a null string if no preprocessor can be
293 made directly available. This preprocessor might be different from the
294 one used by the C compiler. Don't forget to append cpplast after the
295 preprocessor options.
297 cppstdin (cppstdin.U):
298 This variable contains the command which will invoke the C
299 preprocessor on standard input and put the output to stdout.
300 It is primarily used by other Configure units that ask about
301 preprocessor symbols.
303 cppsymbols (Cppsym.U):
304 The variable contains the symbols during a compilation
305 that includes stdio.h.
306 The list is a space-separated list of symbol=value tokens.
308 crosscompile (crosscompile.U):
309 This variable conditionally defines the CROSSCOMPILE symbol
310 which signifies that the build process is be a cross-compilation.
311 This is normally set by hints files or from Configure command line.
313 cryptlib (d_crypt.U):
314 This variable holds -lcrypt or the path to a libcrypt.a archive if
315 the crypt() function is not defined in the standard C library. It is
316 up to the Makefile to use this.
319 This variable is used internally by Configure to determine the
320 full pathname (if any) of the csh program. After Configure runs,
321 the value is reset to a plain "csh" and is not useful.
323 d_access (d_access.U):
324 This variable conditionally defines HAS_ACCESS if the access() system
325 call is available to check for access permissions using real IDs.
327 d_accessx (d_accessx.U):
328 This variable conditionally defines the HAS_ACCESSX symbol, which
329 indicates to the C program that the accessx() routine is available.
332 This variable conditionally defines the HAS_ALARM symbol, which
333 indicates to the C program that the alarm() routine is available.
335 d_archlib (archlib.U):
336 This variable conditionally defines ARCHLIB to hold the pathname
337 of architecture-dependent library files for $package. If
338 $archlib is the same as $privlib, then this is set to undef.
341 This variable conditionally defines the HAS_ATOLF symbol, which
342 indicates to the C program that the atolf() routine is available.
345 This variable conditionally defines the HAS_ATOLL symbol, which
346 indicates to the C program that the atoll() routine is available.
348 d_attribut (d_attribut.U):
349 This variable conditionally defines HASATTRIBUTE, which
350 indicates the C compiler can check for function attributes,
351 such as printf formats.
354 This variable conditionally defines the HAS_BCMP symbol if
355 the bcmp() routine is available to compare strings.
358 This variable conditionally defines the HAS_BCOPY symbol if
359 the bcopy() routine is available to copy strings.
361 d_bincompat5005 (bincompat5005.U):
362 This variable conditionally defines BINCOMPAT5005 so that embed.h
363 can take special action if Perl 5.006 should be binary-compatible
364 with Perl 5.005. This is impossible for builds that use features
365 like threads and multiplicity it is always $undef for those versions.
368 This symbol conditionally defines the symbol BSD when running on a
371 d_bsdgetpgrp (d_getpgrp.U):
372 This variable conditionally defines USE_BSD_GETPGRP if
373 getpgrp needs one arguments whereas USG one needs none.
375 d_bsdsetpgrp (d_setpgrp.U):
376 This variable conditionally defines USE_BSD_SETPGRP if
377 setpgrp needs two arguments whereas USG one needs none.
378 See also d_setpgid for a POSIX interface.
381 This variable conditionally defines the HAS_BZERO symbol if
382 the bzero() routine is available to set memory to 0.
384 d_casti32 (d_casti32.U):
385 This variable conditionally defines CASTI32, which indicates
386 whether the C compiler can cast large floats to 32-bit ints.
388 d_castneg (d_castneg.U):
389 This variable conditionally defines CASTNEG, which indicates
390 wether the C compiler can cast negative float to unsigned.
392 d_charvspr (d_vprintf.U):
393 This variable conditionally defines CHARVSPRINTF if this system
394 has vsprintf returning type (char*). The trend seems to be to
395 declare it as "int vsprintf()".
398 This variable conditionally defines the HAS_CHOWN symbol, which
399 indicates to the C program that the chown() routine is available.
401 d_chroot (d_chroot.U):
402 This variable conditionally defines the HAS_CHROOT symbol, which
403 indicates to the C program that the chroot() routine is available.
405 d_chsize (d_chsize.U):
406 This variable conditionally defines the CHSIZE symbol, which
407 indicates to the C program that the chsize() routine is available
408 to truncate files. You might need a -lx to get this routine.
410 d_closedir (d_closedir.U):
411 This variable conditionally defines HAS_CLOSEDIR if closedir() is
415 This variable conditionally defines the HASCONST symbol, which
416 indicates to the C program that this C compiler knows about the
420 This variable conditionally defines the CRYPT symbol, which
421 indicates to the C program that the crypt() routine is available
422 to encrypt passwords and the like.
425 This variable conditionally defines the CSH symbol, which
426 indicates to the C program that the C-shell exists.
428 d_cuserid (d_cuserid.U):
429 This variable conditionally defines the HAS_CUSERID symbol, which
430 indicates to the C program that the cuserid() routine is available
431 to get character login names.
433 d_dbl_dig (d_dbl_dig.U):
434 This variable conditionally defines d_dbl_dig if this system's
435 header files provide DBL_DIG, which is the number of significant
436 digits in a double precision number.
438 d_difftime (d_difftime.U):
439 This variable conditionally defines the HAS_DIFFTIME symbol, which
440 indicates to the C program that the difftime() routine is available.
442 d_dirnamlen (i_dirent.U):
443 This variable conditionally defines DIRNAMLEN, which indicates
444 to the C program that the length of directory entry names is
445 provided by a d_namelen field.
447 d_dlerror (d_dlerror.U):
448 This variable conditionally defines the HAS_DLERROR symbol, which
449 indicates to the C program that the dlerror() routine is available.
451 d_dlopen (d_dlopen.U):
452 This variable conditionally defines the HAS_DLOPEN symbol, which
453 indicates to the C program that the dlopen() routine is available.
455 d_dlsymun (d_dlsymun.U):
456 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
457 indicates that we need to prepend an underscore to the symbol
458 name before calling dlsym().
460 d_dosuid (d_dosuid.U):
461 This variable conditionally defines the symbol DOSUID, which
462 tells the C program that it should insert setuid emulation code
463 on hosts which have setuid #! scripts disabled.
465 d_drand48proto (d_drand48proto.U):
466 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
467 which indicates to the C program that the system provides
468 a prototype for the drand48() function. Otherwise, it is
469 up to the program to supply one.
472 This variable conditionally defines HAS_DUP2 if dup2() is
473 available to duplicate file descriptors.
475 d_eaccess (d_eaccess.U):
476 This variable conditionally defines the HAS_EACCESS symbol, which
477 indicates to the C program that the eaccess() routine is available.
479 d_endgrent (d_endgrent.U):
480 This variable conditionally defines the HAS_ENDGRENT symbol, which
481 indicates to the C program that the endgrent() routine is available
482 for sequential access of the group database.
484 d_endhent (d_endhent.U):
485 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
486 available to close whatever was being used for host queries.
488 d_endnent (d_endnent.U):
489 This variable conditionally defines HAS_ENDNETENT if endnetent() is
490 available to close whatever was being used for network queries.
492 d_endpent (d_endpent.U):
493 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
494 available to close whatever was being used for protocol queries.
496 d_endpwent (d_endpwent.U):
497 This variable conditionally defines the HAS_ENDPWENT symbol, which
498 indicates to the C program that the endpwent() routine is available
499 for sequential access of the passwd database.
501 d_endsent (d_endsent.U):
502 This variable conditionally defines HAS_ENDSERVENT if endservent() is
503 available to close whatever was being used for service queries.
505 d_endspent (d_endspent.U):
506 This variable conditionally defines HAS_ENDSPENT if endspent() is
507 available to finalize the scan of SysV shadow password entries.
509 d_eofnblk (nblock_io.U):
510 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
511 when reading from a non-blocking I/O source.
514 This variable conditionally defines the symbols EUNICE and VAX, which
515 alerts the C program that it must deal with ideosyncracies of VMS.
517 d_fchmod (d_fchmod.U):
518 This variable conditionally defines the HAS_FCHMOD symbol, which
519 indicates to the C program that the fchmod() routine is available
520 to change mode of opened files.
522 d_fchown (d_fchown.U):
523 This variable conditionally defines the HAS_FCHOWN symbol, which
524 indicates to the C program that the fchown() routine is available
525 to change ownership of opened files.
528 This variable conditionally defines the HAS_FCNTL symbol, and indicates
529 whether the fcntl() function exists
531 d_fd_macros (d_fd_set.U):
532 This variable contains the eventual value of the HAS_FD_MACROS symbol,
533 which indicates if your C compiler knows about the macros which
534 manipulate an fd_set.
536 d_fd_set (d_fd_set.U):
537 This variable contains the eventual value of the HAS_FD_SET symbol,
538 which indicates if your C compiler knows about the fd_set typedef.
540 d_fds_bits (d_fd_set.U):
541 This variable contains the eventual value of the HAS_FDS_BITS symbol,
542 which indicates if your fd_set typedef contains the fds_bits member.
543 If you have an fd_set typedef, but the dweebs who installed it did
544 a half-fast job and neglected to provide the macros to manipulate
545 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
547 d_fgetpos (d_fgetpos.U):
548 This variable conditionally defines HAS_FGETPOS if fgetpos() is
549 available to get the file position indicator.
551 d_flexfnam (d_flexfnam.U):
552 This variable conditionally defines the FLEXFILENAMES symbol, which
553 indicates that the system supports filenames longer than 14 characters.
556 This variable conditionally defines HAS_FLOCK if flock() is
557 available to do file locking.
560 This variable conditionally defines the HAS_FORK symbol, which
561 indicates to the C program that the fork() routine is available.
563 d_fpathconf (d_pathconf.U):
564 This variable conditionally defines the HAS_FPATHCONF symbol, which
565 indicates to the C program that the pathconf() routine is available
566 to determine file-system related limits and options associated
567 with a given open file descriptor.
570 This symbol will be defined if the C compiler supports fpos64_t.
572 d_fs_data_s (d_fs_data_s.U):
573 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
574 which indicates that the struct fs_data is supported.
576 d_fseeko (d_fseeko.U):
577 This variable conditionally defines the HAS_FSEEKO symbol, which
578 indicates to the C program that the fseeko() routine is available.
580 d_fsetpos (d_fsetpos.U):
581 This variable conditionally defines HAS_FSETPOS if fsetpos() is
582 available to set the file position indicator.
584 d_fstatfs (d_fstatfs.U):
585 This variable conditionally defines the HAS_FSTATFS symbol, which
586 indicates to the C program that the fstatfs() routine is available.
588 d_fstatvfs (d_statvfs.U):
589 This variable conditionally defines the HAS_FSTATVFS symbol, which
590 indicates to the C program that the fstatvfs() routine is available.
592 d_ftello (d_ftello.U):
593 This variable conditionally defines the HAS_FTELLO symbol, which
594 indicates to the C program that the ftello() routine is available.
597 This variable conditionally defines the HAS_FTIME symbol, which indicates
598 that the ftime() routine exists. The ftime() routine is basically
599 a sub-second accuracy clock.
601 d_Gconvert (d_gconvert.U):
602 This variable holds what Gconvert is defined as to convert
603 floating point numbers into strings. It could be 'gconvert'
604 or a more complex macro emulating gconvert with gcvt() or sprintf.
606 d_Gconvert='gconvert((x),(n),(t),(b))'
607 d_Gconvert='gcvt((x),(n),(b))'
608 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
610 d_getcwd (d_getcwd.U):
611 This variable conditionally defines the HAS_GETCWD symbol, which
612 indicates to the C program that the getcwd() routine is available
613 to get the current working directory.
615 d_getgrent (d_getgrent.U):
616 This variable conditionally defines the HAS_GETGRENT symbol, which
617 indicates to the C program that the getgrent() routine is available
618 for sequential access of the group database.
620 d_getgrps (d_getgrps.U):
621 This variable conditionally defines the HAS_GETGROUPS symbol, which
622 indicates to the C program that the getgroups() routine is available
623 to get the list of process groups.
625 d_gethbyaddr (d_gethbyad.U):
626 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
627 indicates to the C program that the gethostbyaddr() routine is available
628 to look up hosts by their IP addresses.
630 d_gethbyname (d_gethbynm.U):
631 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
632 indicates to the C program that the gethostbyname() routine is available
633 to look up host names in some data base or other.
635 d_gethent (d_gethent.U):
636 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
637 available to look up host names in some data base or another.
639 d_gethname (d_gethname.U):
640 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
641 indicates to the C program that the gethostname() routine may be
642 used to derive the host name.
644 d_gethostprotos (d_gethostprotos.U):
645 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
646 which indicates to the C program that <netdb.h> supplies
647 prototypes for the various gethost*() functions.
648 See also netdbtype.U for probing for various netdb types.
650 d_getlogin (d_getlogin.U):
651 This variable conditionally defines the HAS_GETLOGIN symbol, which
652 indicates to the C program that the getlogin() routine is available
653 to get the login name.
655 d_getmnt (d_getmnt.U):
656 This variable conditionally defines the HAS_GETMNT symbol, which
657 indicates to the C program that the getmnt() routine is available
658 to retrieve one or more mount info blocks by filename.
660 d_getmntent (d_getmntent.U):
661 This variable conditionally defines the HAS_GETMNTENT symbol, which
662 indicates to the C program that the getmntent() routine is available
663 to iterate through mounted files to get their mount info.
665 d_getnbyaddr (d_getnbyad.U):
666 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
667 indicates to the C program that the getnetbyaddr() routine is available
668 to look up networks by their IP addresses.
670 d_getnbyname (d_getnbynm.U):
671 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
672 indicates to the C program that the getnetbyname() routine is available
673 to look up networks by their names.
675 d_getnent (d_getnent.U):
676 This variable conditionally defines HAS_GETNETENT if getnetent() is
677 available to look up network names in some data base or another.
679 d_getnetprotos (d_getnetprotos.U):
680 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
681 which indicates to the C program that <netdb.h> supplies
682 prototypes for the various getnet*() functions.
683 See also netdbtype.U for probing for various netdb types.
685 d_getpbyname (d_getprotby.U):
686 This variable conditionally defines the HAS_GETPROTOBYNAME
687 symbol, which indicates to the C program that the
688 getprotobyname() routine is available to look up protocols
691 d_getpbynumber (d_getprotby.U):
692 This variable conditionally defines the HAS_GETPROTOBYNUMBER
693 symbol, which indicates to the C program that the
694 getprotobynumber() routine is available to look up protocols
697 d_getpent (d_getpent.U):
698 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
699 available to look up protocols in some data base or another.
701 d_getpgid (d_getpgid.U):
702 This variable conditionally defines the HAS_GETPGID symbol, which
703 indicates to the C program that the getpgid(pid) function
704 is available to get the process group id.
706 d_getpgrp2 (d_getpgrp2.U):
707 This variable conditionally defines the HAS_GETPGRP2 symbol, which
708 indicates to the C program that the getpgrp2() (as in DG/UX) routine
709 is available to get the current process group.
711 d_getpgrp (d_getpgrp.U):
712 This variable conditionally defines HAS_GETPGRP if getpgrp() is
713 available to get the current process group.
715 d_getppid (d_getppid.U):
716 This variable conditionally defines the HAS_GETPPID symbol, which
717 indicates to the C program that the getppid() routine is available
718 to get the parent process ID.
720 d_getprior (d_getprior.U):
721 This variable conditionally defines HAS_GETPRIORITY if getpriority()
722 is available to get a process's priority.
724 d_getprotoprotos (d_getprotoprotos.U):
725 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
726 which indicates to the C program that <netdb.h> supplies
727 prototypes for the various getproto*() functions.
728 See also netdbtype.U for probing for various netdb types.
730 d_getpwent (d_getpwent.U):
731 This variable conditionally defines the HAS_GETPWENT symbol, which
732 indicates to the C program that the getpwent() routine is available
733 for sequential access of the passwd database.
735 d_getsbyname (d_getsrvby.U):
736 This variable conditionally defines the HAS_GETSERVBYNAME
737 symbol, which indicates to the C program that the
738 getservbyname() routine is available to look up services
741 d_getsbyport (d_getsrvby.U):
742 This variable conditionally defines the HAS_GETSERVBYPORT
743 symbol, which indicates to the C program that the
744 getservbyport() routine is available to look up services
747 d_getsent (d_getsent.U):
748 This variable conditionally defines HAS_GETSERVENT if getservent() is
749 available to look up network services in some data base or another.
751 d_getservprotos (d_getservprotos.U):
752 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
753 which indicates to the C program that <netdb.h> supplies
754 prototypes for the various getserv*() functions.
755 See also netdbtype.U for probing for various netdb types.
757 d_getspent (d_getspent.U):
758 This variable conditionally defines HAS_GETSPENT if getspent() is
759 available to retrieve SysV shadow password entries sequentially.
761 d_getspnam (d_getspnam.U):
762 This variable conditionally defines HAS_GETSPNAM if getspnam() is
763 available to retrieve SysV shadow password entries by name.
765 d_gettimeod (d_ftime.U):
766 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
767 indicates that the gettimeofday() system call exists (to obtain a
768 sub-second accuracy clock). You should probably include <sys/resource.h>.
770 d_gnulibc (d_gnulibc.U):
771 Defined if we're dealing with the GNU C Library.
773 d_grpasswd (i_grp.U):
774 This variable conditionally defines GRPASSWD, which indicates
775 that struct group in <grp.h> contains gr_passwd.
777 d_hasmntopt (d_hasmntopt.U):
778 This variable conditionally defines the HAS_HASMNTOPT symbol, which
779 indicates to the C program that the hasmntopt() routine is available
780 to query the mount options of file systems.
783 This variable conditionally defines HAS_HTONL if htonl() and its
784 friends are available to do network order byte swapping.
787 This variable conditionally defines the HAS_ICONV symbol, which
788 indicates to the C program that the iconv() routine is available.
790 d_index (d_strchr.U):
791 This variable conditionally defines HAS_INDEX if index() and
792 rindex() are available for string searching.
794 d_inetaton (d_inetaton.U):
795 This variable conditionally defines the HAS_INET_ATON symbol, which
796 indicates to the C program that the inet_aton() function is available
797 to parse IP address "dotted-quad" strings.
799 d_int64_t (d_int64_t.U):
800 This symbol will be defined if the C compiler supports int64_t.
802 d_isascii (d_isascii.U):
803 This variable conditionally defines the HAS_ISASCII constant,
804 which indicates to the C program that isascii() is available.
806 d_killpg (d_killpg.U):
807 This variable conditionally defines the HAS_KILLPG symbol, which
808 indicates to the C program that the killpg() routine is available
809 to kill process groups.
811 d_lchown (d_lchown.U):
812 This variable conditionally defines the HAS_LCHOWN symbol, which
813 indicates to the C program that the lchown() routine is available
814 to operate on a symbolic link (instead of following the link).
816 d_ldbl_dig (d_ldbl_dig.U):
817 This variable conditionally defines d_ldbl_dig if this system's
818 header files provide LDBL_DIG, which is the number of significant
819 digits in a long double precision number.
822 This variable conditionally defines HAS_LINK if link() is
823 available to create hard links.
825 d_locconv (d_locconv.U):
826 This variable conditionally defines HAS_LOCALECONV if localeconv() is
827 available for numeric and monetary formatting conventions.
830 This variable conditionally defines HAS_LOCKF if lockf() is
831 available to do file locking.
833 d_longdbl (d_longdbl.U):
834 This variable conditionally defines HAS_LONG_DOUBLE if
835 the long double type is supported.
837 d_longlong (d_longlong.U):
838 This variable conditionally defines HAS_LONG_LONG if
839 the long long type is supported.
842 This variable conditionally defines HAS_LSTAT if lstat() is
843 available to do file stats on symbolic links.
846 This variable conditionally defines the HAS_MBLEN symbol, which
847 indicates to the C program that the mblen() routine is available
848 to find the number of bytes in a multibye character.
850 d_mbstowcs (d_mbstowcs.U):
851 This variable conditionally defines the HAS_MBSTOWCS symbol, which
852 indicates to the C program that the mbstowcs() routine is available
853 to convert a multibyte string into a wide character string.
855 d_mbtowc (d_mbtowc.U):
856 This variable conditionally defines the HAS_MBTOWC symbol, which
857 indicates to the C program that the mbtowc() routine is available
858 to convert multibyte to a wide character.
860 d_memchr (d_memchr.U):
861 This variable conditionally defines the HAS_MEMCHR symbol, which
862 indicates to the C program that the memchr() routine is available
863 to locate characters within a C string.
865 d_memcmp (d_memcmp.U):
866 This variable conditionally defines the HAS_MEMCMP symbol, which
867 indicates to the C program that the memcmp() routine is available
868 to compare blocks of memory.
870 d_memcpy (d_memcpy.U):
871 This variable conditionally defines the HAS_MEMCPY symbol, which
872 indicates to the C program that the memcpy() routine is available
873 to copy blocks of memory.
875 d_memmove (d_memmove.U):
876 This variable conditionally defines the HAS_MEMMOVE symbol, which
877 indicates to the C program that the memmove() routine is available
878 to copy potentatially overlapping blocks of memory.
880 d_memset (d_memset.U):
881 This variable conditionally defines the HAS_MEMSET symbol, which
882 indicates to the C program that the memset() routine is available
883 to set blocks of memory.
886 This variable conditionally defines the HAS_MKDIR symbol, which
887 indicates to the C program that the mkdir() routine is available
888 to create directories..
890 d_mkdtemp (d_mkdtemp.U):
891 This variable conditionally defines the HAS_MKDTEMP symbol, which
892 indicates to the C program that the mkdtemp() routine is available
893 to exclusively create a uniquely named temporary directory.
895 d_mkfifo (d_mkfifo.U):
896 This variable conditionally defines the HAS_MKFIFO symbol, which
897 indicates to the C program that the mkfifo() routine is available.
899 d_mkstemp (d_mkstemp.U):
900 This variable conditionally defines the HAS_MKSTEMP symbol, which
901 indicates to the C program that the mkstemp() routine is available
902 to exclusively create and open a uniquely named temporary file.
904 d_mkstemps (d_mkstemps.U):
905 This variable conditionally defines the HAS_MKSTEMPS symbol, which
906 indicates to the C program that the mkstemps() routine is available
907 to exclusively create and open a uniquely named (with a suffix)
910 d_mktime (d_mktime.U):
911 This variable conditionally defines the HAS_MKTIME symbol, which
912 indicates to the C program that the mktime() routine is available.
915 This variable conditionally defines HAS_MMAP if mmap() is
916 available to map a file into memory.
918 d_mprotect (d_mprotect.U):
919 This variable conditionally defines HAS_MPROTECT if mprotect() is
920 available to modify the access protection of a memory mapped file.
923 This variable conditionally defines the HAS_MSG symbol, which
924 indicates that the entire msg*(2) library is present.
926 d_msg_ctrunc (d_socket.U):
927 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
928 which indicates that the MSG_CTRUNC is available. #ifdef is
929 not enough because it may be an enum, glibc has been known to do this.
931 d_msg_dontroute (d_socket.U):
932 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
933 which indicates that the MSG_DONTROUTE is available. #ifdef is
934 not enough because it may be an enum, glibc has been known to do this.
936 d_msg_oob (d_socket.U):
937 This variable conditionally defines the HAS_MSG_OOB symbol,
938 which indicates that the MSG_OOB is available. #ifdef is
939 not enough because it may be an enum, glibc has been known to do this.
941 d_msg_peek (d_socket.U):
942 This variable conditionally defines the HAS_MSG_PEEK symbol,
943 which indicates that the MSG_PEEK is available. #ifdef is
944 not enough because it may be an enum, glibc has been known to do this.
946 d_msg_proxy (d_socket.U):
947 This variable conditionally defines the HAS_MSG_PROXY symbol,
948 which indicates that the MSG_PROXY is available. #ifdef is
949 not enough because it may be an enum, glibc has been known to do this.
951 d_msgctl (d_msgctl.U):
952 This variable conditionally defines the HAS_MSGCTL symbol, which
953 indicates to the C program that the msgctl() routine is available.
955 d_msgget (d_msgget.U):
956 This variable conditionally defines the HAS_MSGGET symbol, which
957 indicates to the C program that the msgget() routine is available.
959 d_msgrcv (d_msgrcv.U):
960 This variable conditionally defines the HAS_MSGRCV symbol, which
961 indicates to the C program that the msgrcv() routine is available.
963 d_msgsnd (d_msgsnd.U):
964 This variable conditionally defines the HAS_MSGSND symbol, which
965 indicates to the C program that the msgsnd() routine is available.
968 This variable conditionally defines HAS_MSYNC if msync() is
969 available to synchronize a mapped file.
971 d_munmap (d_munmap.U):
972 This variable conditionally defines HAS_MUNMAP if munmap() is
973 available to unmap a region mapped by mmap().
975 d_mymalloc (mallocsrc.U):
976 This variable conditionally defines MYMALLOC in case other parts
977 of the source want to take special action if MYMALLOC is used.
978 This may include different sorts of profiling or error detection.
981 This variable conditionally defines the HAS_NICE symbol, which
982 indicates to the C program that the nice() routine is available.
984 d_nv_preserves_uv (perlxv.U):
985 This variable indicates whether a variable of type nvtype
986 can preserve all the bits a variable of type uvtype.
989 This symbol will be defined if the C compiler supports off64_t.
991 d_old_pthread_create_joinable (d_pthrattrj.U):
992 This variable conditionally defines pthread_create_joinable.
993 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
995 d_oldpthreads (usethreads.U):
996 This variable conditionally defines the OLD_PTHREADS_API symbol,
997 and indicates that Perl should be built to use the old
998 draft POSIX threads API. This is only potentially meaningful if
1001 d_oldsock (d_socket.U):
1002 This variable conditionally defines the OLDSOCKET symbol, which
1003 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1005 d_open3 (d_open3.U):
1006 This variable conditionally defines the HAS_OPEN3 manifest constant,
1007 which indicates to the C program that the 3 argument version of
1008 the open(2) function is available.
1010 d_pathconf (d_pathconf.U):
1011 This variable conditionally defines the HAS_PATHCONF symbol, which
1012 indicates to the C program that the pathconf() routine is available
1013 to determine file-system related limits and options associated
1014 with a given filename.
1016 d_pause (d_pause.U):
1017 This variable conditionally defines the HAS_PAUSE symbol, which
1018 indicates to the C program that the pause() routine is available
1019 to suspend a process until a signal is received.
1021 d_phostname (d_gethname.U):
1022 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1023 contains the shell command which, when fed to popen(), may be
1024 used to derive the host name.
1027 This variable conditionally defines the HAS_PIPE symbol, which
1028 indicates to the C program that the pipe() routine is available
1029 to create an inter-process channel.
1032 This variable conditionally defines the HAS_POLL symbol, which
1033 indicates to the C program that the poll() routine is available
1034 to poll active file descriptors.
1036 d_portable (d_portable.U):
1037 This variable conditionally defines the PORTABLE symbol, which
1038 indicates to the C program that it should not assume that it is
1039 running on the machine it was compiled on.
1041 d_PRId64 (quadfio.U):
1042 This variable conditionally defines the PERL_PRId64 symbol, which
1043 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1045 d_PRIeldbl (longdblfio.U):
1046 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1047 indiciates that stdio has a symbol to print long doubles.
1049 d_PRIEldbl (longdblfio.U):
1050 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1051 indiciates that stdio has a symbol to print long doubles.
1053 d_PRIfldbl (longdblfio.U):
1054 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1055 indiciates that stdio has a symbol to print long doubles.
1057 d_PRIFldbl (longdblfio.U):
1058 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1059 indiciates that stdio has a symbol to print long doubles.
1061 d_PRIgldbl (longdblfio.U):
1062 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1063 indiciates that stdio has a symbol to print long doubles.
1065 d_PRIGldbl (longdblfio.U):
1066 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1067 indiciates that stdio has a symbol to print long doubles.
1069 d_PRIi64 (quadfio.U):
1070 This variable conditionally defines the PERL_PRIi64 symbol, which
1071 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1073 d_PRIo64 (quadfio.U):
1074 This variable conditionally defines the PERL_PRIo64 symbol, which
1075 indiciates that stdio has a symbol to print 64-bit octal numbers.
1077 d_PRIu64 (quadfio.U):
1078 This variable conditionally defines the PERL_PRIu64 symbol, which
1079 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1082 d_PRIx64 (quadfio.U):
1083 This variable conditionally defines the PERL_PRIx64 symbol, which
1084 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1086 d_PRIX64 (quadfio.U):
1087 This variable conditionally defines the PERL_PRIX64 symbol, which
1088 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1090 d_pthread_yield (d_pthread_y.U):
1091 This variable conditionally defines the HAS_PTHREAD_YIELD
1092 symbol if the pthread_yield routine is available to yield
1093 the execution of the current thread.
1096 This variable conditionally defines PWAGE, which indicates
1097 that struct passwd contains pw_age.
1099 d_pwchange (i_pwd.U):
1100 This variable conditionally defines PWCHANGE, which indicates
1101 that struct passwd contains pw_change.
1103 d_pwclass (i_pwd.U):
1104 This variable conditionally defines PWCLASS, which indicates
1105 that struct passwd contains pw_class.
1107 d_pwcomment (i_pwd.U):
1108 This variable conditionally defines PWCOMMENT, which indicates
1109 that struct passwd contains pw_comment.
1111 d_pwexpire (i_pwd.U):
1112 This variable conditionally defines PWEXPIRE, which indicates
1113 that struct passwd contains pw_expire.
1115 d_pwgecos (i_pwd.U):
1116 This variable conditionally defines PWGECOS, which indicates
1117 that struct passwd contains pw_gecos.
1119 d_pwpasswd (i_pwd.U):
1120 This variable conditionally defines PWPASSWD, which indicates
1121 that struct passwd contains pw_passwd.
1123 d_pwquota (i_pwd.U):
1124 This variable conditionally defines PWQUOTA, which indicates
1125 that struct passwd contains pw_quota.
1127 d_quad (quadtype.U):
1128 This variable, if defined, tells that there's a 64-bit integer type,
1131 d_readdir (d_readdir.U):
1132 This variable conditionally defines HAS_READDIR if readdir() is
1133 available to read directory entries.
1135 d_readlink (d_readlink.U):
1136 This variable conditionally defines the HAS_READLINK symbol, which
1137 indicates to the C program that the readlink() routine is available
1138 to read the value of a symbolic link.
1140 d_rename (d_rename.U):
1141 This variable conditionally defines the HAS_RENAME symbol, which
1142 indicates to the C program that the rename() routine is available
1145 d_rewinddir (d_readdir.U):
1146 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1149 d_rmdir (d_rmdir.U):
1150 This variable conditionally defines HAS_RMDIR if rmdir() is
1151 available to remove directories.
1153 d_safebcpy (d_safebcpy.U):
1154 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1155 the bcopy() routine can do overlapping copies.
1157 d_safemcpy (d_safemcpy.U):
1158 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1159 the memcpy() routine can do overlapping copies.
1161 d_sanemcmp (d_sanemcmp.U):
1162 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1163 the memcpy() routine is available and can be used to compare relative
1164 magnitudes of chars with their high bits set.
1166 d_sched_yield (d_pthread_y.U):
1167 This variable conditionally defines the HAS_SCHED_YIELD
1168 symbol if the sched_yield routine is available to yield
1169 the execution of the current thread.
1171 d_scm_rights (d_socket.U):
1172 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1173 which indicates that the SCM_RIGHTS is available. #ifdef is
1174 not enough because it may be an enum, glibc has been known to do this.
1176 d_seekdir (d_readdir.U):
1177 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1180 d_select (d_select.U):
1181 This variable conditionally defines HAS_SELECT if select() is
1182 available to select active file descriptors. A <sys/time.h>
1183 inclusion may be necessary for the timeout field.
1186 This variable conditionally defines the HAS_SEM symbol, which
1187 indicates that the entire sem*(2) library is present.
1189 d_semctl (d_semctl.U):
1190 This variable conditionally defines the HAS_SEMCTL symbol, which
1191 indicates to the C program that the semctl() routine is available.
1193 d_semctl_semid_ds (d_union_semun.U):
1194 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1195 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1197 d_semctl_semun (d_union_semun.U):
1198 This variable conditionally defines USE_SEMCTL_SEMUN, which
1199 indicates that union semun is to be used for semctl IPC_STAT.
1201 d_semget (d_semget.U):
1202 This variable conditionally defines the HAS_SEMGET symbol, which
1203 indicates to the C program that the semget() routine is available.
1205 d_semop (d_semop.U):
1206 This variable conditionally defines the HAS_SEMOP symbol, which
1207 indicates to the C program that the semop() routine is available.
1209 d_setegid (d_setegid.U):
1210 This variable conditionally defines the HAS_SETEGID symbol, which
1211 indicates to the C program that the setegid() routine is available
1212 to change the effective gid of the current program.
1214 d_seteuid (d_seteuid.U):
1215 This variable conditionally defines the HAS_SETEUID symbol, which
1216 indicates to the C program that the seteuid() routine is available
1217 to change the effective uid of the current program.
1219 d_setgrent (d_setgrent.U):
1220 This variable conditionally defines the HAS_SETGRENT symbol, which
1221 indicates to the C program that the setgrent() routine is available
1222 for initializing sequential access to the group database.
1224 d_setgrps (d_setgrps.U):
1225 This variable conditionally defines the HAS_SETGROUPS symbol, which
1226 indicates to the C program that the setgroups() routine is available
1227 to set the list of process groups.
1229 d_sethent (d_sethent.U):
1230 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1233 d_setlinebuf (d_setlnbuf.U):
1234 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1235 indicates to the C program that the setlinebuf() routine is available
1236 to change stderr or stdout from block-buffered or unbuffered to a
1239 d_setlocale (d_setlocale.U):
1240 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1241 available to handle locale-specific ctype implementations.
1243 d_setnent (d_setnent.U):
1244 This variable conditionally defines HAS_SETNETENT if setnetent() is
1247 d_setpent (d_setpent.U):
1248 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1251 d_setpgid (d_setpgid.U):
1252 This variable conditionally defines the HAS_SETPGID symbol if the
1253 setpgid(pid, gpid) function is available to set process group ID.
1255 d_setpgrp2 (d_setpgrp2.U):
1256 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1257 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1258 is available to set the current process group.
1260 d_setpgrp (d_setpgrp.U):
1261 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1262 available to set the current process group.
1264 d_setprior (d_setprior.U):
1265 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1266 is available to set a process's priority.
1268 d_setpwent (d_setpwent.U):
1269 This variable conditionally defines the HAS_SETPWENT symbol, which
1270 indicates to the C program that the setpwent() routine is available
1271 for initializing sequential access to the passwd database.
1273 d_setregid (d_setregid.U):
1274 This variable conditionally defines HAS_SETREGID if setregid() is
1275 available to change the real and effective gid of the current
1278 d_setresgid (d_setregid.U):
1279 This variable conditionally defines HAS_SETRESGID if setresgid() is
1280 available to change the real, effective and saved gid of the current
1283 d_setresuid (d_setreuid.U):
1284 This variable conditionally defines HAS_SETREUID if setresuid() is
1285 available to change the real, effective and saved uid of the current
1288 d_setreuid (d_setreuid.U):
1289 This variable conditionally defines HAS_SETREUID if setreuid() is
1290 available to change the real and effective uid of the current
1293 d_setrgid (d_setrgid.U):
1294 This variable conditionally defines the HAS_SETRGID symbol, which
1295 indicates to the C program that the setrgid() routine is available
1296 to change the real gid of the current program.
1298 d_setruid (d_setruid.U):
1299 This variable conditionally defines the HAS_SETRUID symbol, which
1300 indicates to the C program that the setruid() routine is available
1301 to change the real uid of the current program.
1303 d_setsent (d_setsent.U):
1304 This variable conditionally defines HAS_SETSERVENT if setservent() is
1307 d_setsid (d_setsid.U):
1308 This variable conditionally defines HAS_SETSID if setsid() is
1309 available to set the process group ID.
1311 d_setspent (d_setspent.U):
1312 This variable conditionally defines HAS_SETSPENT if setspent() is
1313 available to initialize the scan of SysV shadow password entries.
1315 d_setvbuf (d_setvbuf.U):
1316 This variable conditionally defines the HAS_SETVBUF symbol, which
1317 indicates to the C program that the setvbuf() routine is available
1318 to change buffering on an open stdio stream.
1321 This variable conditionally defines the USE_SFIO symbol,
1322 and indicates whether sfio is available (and should be used).
1325 This variable conditionally defines the HAS_SHM symbol, which
1326 indicates that the entire shm*(2) library is present.
1328 d_shmat (d_shmat.U):
1329 This variable conditionally defines the HAS_SHMAT symbol, which
1330 indicates to the C program that the shmat() routine is available.
1332 d_shmatprototype (d_shmat.U):
1333 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1334 symbol, which indicates that sys/shm.h has a prototype for
1337 d_shmctl (d_shmctl.U):
1338 This variable conditionally defines the HAS_SHMCTL symbol, which
1339 indicates to the C program that the shmctl() routine is available.
1341 d_shmdt (d_shmdt.U):
1342 This variable conditionally defines the HAS_SHMDT symbol, which
1343 indicates to the C program that the shmdt() routine is available.
1345 d_shmget (d_shmget.U):
1346 This variable conditionally defines the HAS_SHMGET symbol, which
1347 indicates to the C program that the shmget() routine is available.
1349 d_sigaction (d_sigaction.U):
1350 This variable conditionally defines the HAS_SIGACTION symbol, which
1351 indicates that the Vr4 sigaction() routine is available.
1353 d_sigsetjmp (d_sigsetjmp.U):
1354 This variable conditionally defines the HAS_SIGSETJMP symbol,
1355 which indicates that the sigsetjmp() routine is available to
1356 call setjmp() and optionally save the process's signal mask.
1358 d_socket (d_socket.U):
1359 This variable conditionally defines HAS_SOCKET, which indicates
1360 that the BSD socket interface is supported.
1362 d_socklen_t (d_socklen_t.U):
1363 This symbol will be defined if the C compiler supports socklen_t.
1365 d_sockpair (d_socket.U):
1366 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1367 indicates that the BSD socketpair() is supported.
1369 d_sqrtl (d_sqrtl.U):
1370 This variable conditionally defines the HAS_SQRTL symbol, which
1371 indicates to the C program that the sqrtl() routine is available.
1373 d_statblks (d_statblks.U):
1374 This variable conditionally defines USE_STAT_BLOCKS
1375 if this system has a stat structure declaring
1376 st_blksize and st_blocks.
1378 d_statfs_f_flags (d_statfs_f_flags.U):
1379 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1380 symbol, which indicates to struct statfs from has f_flags member.
1381 This kind of struct statfs is coming from sys/mount.h (BSD),
1382 not from sys/statfs.h (SYSV).
1384 d_statfs_s (d_statfs_s.U):
1385 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1386 which indicates that the struct statfs is supported.
1388 d_statvfs (d_statvfs.U):
1389 This variable conditionally defines the HAS_STATVFS symbol, which
1390 indicates to the C program that the statvfs() routine is available.
1392 d_stdio_cnt_lval (d_stdstdio.U):
1393 This variable conditionally defines STDIO_CNT_LVALUE if the
1394 FILE_cnt macro can be used as an lvalue.
1396 d_stdio_ptr_lval (d_stdstdio.U):
1397 This variable conditionally defines STDIO_PTR_LVALUE if the
1398 FILE_ptr macro can be used as an lvalue.
1400 d_stdio_stream_array (stdio_streams.U):
1401 This variable tells whether there is an array holding
1404 d_stdiobase (d_stdstdio.U):
1405 This variable conditionally defines USE_STDIO_BASE if this system
1406 has a FILE structure declaring a usable _base field (or equivalent)
1409 d_stdstdio (d_stdstdio.U):
1410 This variable conditionally defines USE_STDIO_PTR if this system
1411 has a FILE structure declaring usable _ptr and _cnt fields (or
1412 equivalent) in stdio.h.
1414 d_strchr (d_strchr.U):
1415 This variable conditionally defines HAS_STRCHR if strchr() and
1416 strrchr() are available for string searching.
1418 d_strcoll (d_strcoll.U):
1419 This variable conditionally defines HAS_STRCOLL if strcoll() is
1420 available to compare strings using collating information.
1422 d_strctcpy (d_strctcpy.U):
1423 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1424 indicates to the C program that this C compiler knows how to copy
1427 d_strerrm (d_strerror.U):
1428 This variable holds what Strerrr is defined as to translate an error
1429 code condition into an error message string. It could be 'strerror'
1430 or a more complex macro emulating strrror with sys_errlist[], or the
1431 "unknown" string when both strerror and sys_errlist are missing.
1433 d_strerror (d_strerror.U):
1434 This variable conditionally defines HAS_STRERROR if strerror() is
1435 available to translate error numbers to strings.
1437 d_strtod (d_strtod.U):
1438 This variable conditionally defines the HAS_STRTOD symbol, which
1439 indicates to the C program that the strtod() routine is available
1440 to provide better numeric string conversion than atof().
1442 d_strtol (d_strtol.U):
1443 This variable conditionally defines the HAS_STRTOL symbol, which
1444 indicates to the C program that the strtol() routine is available
1445 to provide better numeric string conversion than atoi() and friends.
1447 d_strtold (d_strtold.U):
1448 This variable conditionally defines the HAS_STRTOLD symbol, which
1449 indicates to the C program that the strtold() routine is available.
1451 d_strtoll (d_strtoll.U):
1452 This variable conditionally defines the HAS_STRTOLL symbol, which
1453 indicates to the C program that the strtoll() routine is available.
1455 d_strtoul (d_strtoul.U):
1456 This variable conditionally defines the HAS_STRTOUL symbol, which
1457 indicates to the C program that the strtoul() routine is available
1458 to provide conversion of strings to unsigned long.
1460 d_strtoull (d_strtoull.U):
1461 This variable conditionally defines the HAS_STRTOULL symbol, which
1462 indicates to the C program that the strtoull() routine is available.
1464 d_strtouq (d_strtouq.U):
1465 This variable conditionally defines the HAS_STRTOUQ symbol, which
1466 indicates to the C program that the strtouq() routine is available.
1468 d_strxfrm (d_strxfrm.U):
1469 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1470 available to transform strings.
1472 d_suidsafe (d_dosuid.U):
1473 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1474 if setuid scripts can be secure. This test looks in /dev/fd/.
1476 d_symlink (d_symlink.U):
1477 This variable conditionally defines the HAS_SYMLINK symbol, which
1478 indicates to the C program that the symlink() routine is available
1479 to create symbolic links.
1481 d_syscall (d_syscall.U):
1482 This variable conditionally defines HAS_SYSCALL if syscall() is
1483 available call arbitrary system calls.
1485 d_sysconf (d_sysconf.U):
1486 This variable conditionally defines the HAS_SYSCONF symbol, which
1487 indicates to the C program that the sysconf() routine is available
1488 to determine system related limits and options.
1490 d_sysernlst (d_strerror.U):
1491 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1492 is available to translate error numbers to the symbolic name.
1494 d_syserrlst (d_strerror.U):
1495 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1496 available to translate error numbers to strings.
1498 d_system (d_system.U):
1499 This variable conditionally defines HAS_SYSTEM if system() is
1500 available to issue a shell command.
1502 d_tcgetpgrp (d_tcgtpgrp.U):
1503 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1504 indicates to the C program that the tcgetpgrp() routine is available.
1505 to get foreground process group ID.
1507 d_tcsetpgrp (d_tcstpgrp.U):
1508 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1509 indicates to the C program that the tcsetpgrp() routine is available
1510 to set foreground process group ID.
1512 d_telldir (d_readdir.U):
1513 This variable conditionally defines HAS_TELLDIR if telldir() is
1516 d_telldirproto (d_telldirproto.U):
1517 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1518 which indicates to the C program that the system provides
1519 a prototype for the telldir() function. Otherwise, it is
1520 up to the program to supply one.
1523 This variable conditionally defines the HAS_TIME symbol, which indicates
1524 that the time() routine exists. The time() routine is normaly
1525 provided on UNIX systems.
1527 d_times (d_times.U):
1528 This variable conditionally defines the HAS_TIMES symbol, which indicates
1529 that the times() routine exists. The times() routine is normaly
1530 provided on UNIX systems. You may have to include <sys/times.h>.
1532 d_truncate (d_truncate.U):
1533 This variable conditionally defines HAS_TRUNCATE if truncate() is
1534 available to truncate files.
1536 d_tzname (d_tzname.U):
1537 This variable conditionally defines HAS_TZNAME if tzname[] is
1538 available to access timezone names.
1540 d_umask (d_umask.U):
1541 This variable conditionally defines the HAS_UMASK symbol, which
1542 indicates to the C program that the umask() routine is available.
1543 to set and get the value of the file creation mask.
1545 d_uname (d_gethname.U):
1546 This variable conditionally defines the HAS_UNAME symbol, which
1547 indicates to the C program that the uname() routine may be
1548 used to derive the host name.
1550 d_union_semun (d_union_semun.U):
1551 This variable conditionally defines HAS_UNION_SEMUN if the
1552 union semun is defined by including <sys/sem.h>.
1554 d_ustat (d_ustat.U):
1555 This variable conditionally defines HAS_USTAT if ustat() is
1556 available to query file system statistics by dev_t.
1558 d_vendorbin (vendorbin.U):
1559 This variable conditionally defines PERL_VENDORBIN.
1561 d_vendorlib (vendorlib.U):
1562 This variable conditionally defines PERL_VENDORLIB.
1564 d_vfork (d_vfork.U):
1565 This variable conditionally defines the HAS_VFORK symbol, which
1566 indicates the vfork() routine is available.
1568 d_void_closedir (d_closedir.U):
1569 This variable conditionally defines VOID_CLOSEDIR if closedir()
1570 does not return a value.
1572 d_voidsig (d_voidsig.U):
1573 This variable conditionally defines VOIDSIG if this system
1574 declares "void (*signal(...))()" in signal.h. The old way was to
1575 declare it as "int (*signal(...))()".
1577 d_voidtty (i_sysioctl.U):
1578 This variable conditionally defines USE_IOCNOTTY to indicate that the
1579 ioctl() call with TIOCNOTTY should be used to void tty association.
1580 Otherwise (on USG probably), it is enough to close the standard file
1581 decriptors and do a setpgrp().
1583 d_volatile (d_volatile.U):
1584 This variable conditionally defines the HASVOLATILE symbol, which
1585 indicates to the C program that this C compiler knows about the
1586 volatile declaration.
1588 d_vprintf (d_vprintf.U):
1589 This variable conditionally defines the HAS_VPRINTF symbol, which
1590 indicates to the C program that the vprintf() routine is available
1591 to printf with a pointer to an argument list.
1593 d_wait4 (d_wait4.U):
1594 This variable conditionally defines the HAS_WAIT4 symbol, which
1595 indicates the wait4() routine is available.
1597 d_waitpid (d_waitpid.U):
1598 This variable conditionally defines HAS_WAITPID if waitpid() is
1599 available to wait for child process.
1601 d_wcstombs (d_wcstombs.U):
1602 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1603 indicates to the C program that the wcstombs() routine is available
1604 to convert wide character strings to multibyte strings.
1606 d_wctomb (d_wctomb.U):
1607 This variable conditionally defines the HAS_WCTOMB symbol, which
1608 indicates to the C program that the wctomb() routine is available
1609 to convert a wide character to a multibyte.
1612 This variable conditionally defines the symbol XENIX, which alerts
1613 the C program that it runs under Xenix.
1616 This variable is used internally by Configure to determine the
1617 full pathname (if any) of the date program. After Configure runs,
1618 the value is reset to a plain "date" and is not useful.
1620 db_hashtype (i_db.U):
1621 This variable contains the type of the hash structure element
1622 in the <db.h> header file. In older versions of DB, it was
1623 int, while in newer ones it is u_int32_t.
1625 db_prefixtype (i_db.U):
1626 This variable contains the type of the prefix structure element
1627 in the <db.h> header file. In older versions of DB, it was
1628 int, while in newer ones it is size_t.
1630 defvoidused (voidflags.U):
1631 This variable contains the default value of the VOIDUSED symbol (15).
1633 direntrytype (i_dirent.U):
1634 This symbol is set to 'struct direct' or 'struct dirent' depending on
1635 whether dirent is available or not. You should use this pseudo type to
1636 portably declare your directory entries.
1639 This variable contains the extension that is to be used for the
1640 dynamically loaded modules that perl generaties.
1643 This variable contains the name of the dynamic loading file that
1644 will be used with the package.
1646 doublesize (doublesize.U):
1647 This variable contains the value of the DOUBLESIZE symbol, which
1648 indicates to the C program how many bytes there are in a double.
1650 drand01 (randfunc.U):
1651 Indicates the macro to be used to generate normalized
1652 random numbers. Uses randfunc, often divided by
1653 (double) (((unsigned long) 1 << randbits)) in order to
1654 normalize the result.
1655 In C programs, the macro 'Drand01' is mapped to drand01.
1657 dynamic_ext (Extensions.U):
1658 This variable holds a list of XS extension files we want to
1659 link dynamically into the package. It is used by Makefile.
1661 eagain (nblock_io.U):
1662 This variable bears the symbolic errno code set by read() when no
1663 data is present on the file and non-blocking I/O was enabled (otherwise,
1664 read() blocks naturally).
1667 This variable conditionally defines EBCDIC if this
1668 system uses EBCDIC encoding. Among other things, this
1669 means that the character ranges are not contiguous.
1673 This variable is used internally by Configure to determine the
1674 full pathname (if any) of the echo program. After Configure runs,
1675 the value is reset to a plain "echo" and is not useful.
1678 This variable is used internally by Configure to determine the
1679 full pathname (if any) of the egrep program. After Configure runs,
1680 the value is reset to a plain "egrep" and is not useful.
1683 This variable is defined but not used by Configure.
1684 The value is a plain '' and is not useful.
1687 When running under Eunice this variable contains a command which will
1688 convert a shell script to the proper form of text file for it to be
1689 executable by the shell. On other systems it is a no-op.
1692 This is an old synonym for _exe.
1695 This variable is used internally by Configure to determine the
1696 full pathname (if any) of the expr program. After Configure runs,
1697 the value is reset to a plain "expr" and is not useful.
1699 extensions (Extensions.U):
1700 This variable holds a list of all extension files (both XS and
1701 non-xs linked into the package. It is propagated to Config.pm
1702 and is typically used to test whether a particular extesion
1705 fflushall (fflushall.U):
1706 This symbol, if defined, tells that to flush
1707 all pending stdio output one must loop through all
1708 the stdio file handles stored in an array and fflush them.
1709 Note that if fflushNULL is defined, fflushall will not
1710 even be probed for and will be left undefined.
1712 fflushNULL (fflushall.U):
1713 This symbol, if defined, tells that fflush(NULL) does flush
1714 all pending stdio output.
1717 This variable is defined but not used by Configure.
1718 The value is a plain '' and is not useful.
1720 firstmakefile (Unix.U):
1721 This variable defines the first file searched by make. On unix,
1722 it is makefile (then Makefile). On case-insensitive systems,
1723 it might be something else. This is only used to deal with
1724 convoluted make depend tricks.
1727 This variable is defined but not used by Configure.
1728 The value is a plain '' and is not useful.
1730 fpossize (fpossize.U):
1731 This variable contains the size of a fpostype in bytes.
1733 fpostype (fpostype.U):
1734 This variable defines Fpos_t to be something like fpos_t, long,
1735 uint, or whatever type is used to declare file positions in libc.
1737 freetype (mallocsrc.U):
1738 This variable contains the return type of free(). It is usually
1739 void, but occasionally int.
1742 This variable contains the full pathname to 'ar', whether or
1743 not the user has specified 'portability'. This is only used
1747 This variable contains the full pathname to 'csh', whether or
1748 not the user has specified 'portability'. This is only used
1749 in the compiled C program, and we assume that all systems which
1750 can share this executable will have the same full pathname to
1753 full_sed (Loc_sed.U):
1754 This variable contains the full pathname to 'sed', whether or
1755 not the user has specified 'portability'. This is only used
1756 in the compiled C program, and we assume that all systems which
1757 can share this executable will have the same full pathname to
1761 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1762 indicate whether the compiler is version 1 or 2. This is used in
1763 setting some of the default cflags. It is set to '' if not gcc.
1766 This variable contains the format string used for printing a Gid_t.
1768 gidsign (gidsign.U):
1769 This variable contains the signedness of a gidtype.
1770 1 for unsigned, -1 for signed.
1772 gidsize (gidsize.U):
1773 This variable contains the size of a gidtype in bytes.
1775 gidtype (gidtype.U):
1776 This variable defines Gid_t to be something like gid_t, int,
1777 ushort, or whatever type is used to declare the return type
1778 of getgid(). Typically, it is the type of group ids in the kernel.
1781 This variable holds the general path (space-separated) used to
1782 find libraries. It may contain directories that do not exist on
1783 this platform, libpth is the cleaned-up version.
1786 This variable is used internally by Configure to determine the
1787 full pathname (if any) of the grep program. After Configure runs,
1788 the value is reset to a plain "grep" and is not useful.
1791 This variable contains a command that produces the text of the
1792 /etc/group file. This is normally "cat /etc/group", but can be
1793 "ypcat group" when NIS is used.
1794 On some systems, such as os390, there may be no equivalent
1795 command, in which case this variable is unset.
1797 groupstype (groupstype.U):
1798 This variable defines Groups_t to be something like gid_t, int,
1799 ushort, or whatever type is used for the second argument to
1800 getgroups() and setgroups(). Usually, this is the same as
1801 gidtype (gid_t), but sometimes it isn't.
1804 This variable is used internally by Configure to determine the
1805 full pathname (if any) of the gzip program. After Configure runs,
1806 the value is reset to a plain "gzip" and is not useful.
1808 h_fcntl (h_fcntl.U):
1809 This is variable gets set in various places to tell i_fcntl that
1810 <fcntl.h> should be included.
1812 h_sysfile (h_sysfile.U):
1813 This is variable gets set in various places to tell i_sys_file that
1814 <sys/file.h> should be included.
1817 Gives the type of hints used for previous answers. May be one of
1818 "default", "recommended" or "previous".
1821 This variable contains a command that produces the text of the
1822 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1823 "ypcat hosts" when NIS is used.
1824 On some systems, such as os390, there may be no equivalent
1825 command, in which case this variable is unset.
1828 This variable contains a flag which will tell the C compiler and loader
1829 to produce a program running with a huge memory model. If the
1830 huge model is not supported, contains the flag to produce large
1831 model programs. It is up to the Makefile to use this.
1834 This variable is the size of an I16 in bytes.
1837 This variable contains the C type used for Perl's I16.
1840 This variable is the size of an I32 in bytes.
1843 This variable contains the C type used for Perl's I32.
1846 This variable is the size of an I64 in bytes.
1849 This variable contains the C type used for Perl's I64.
1852 This variable is the size of an I8 in bytes.
1855 This variable contains the C type used for Perl's I8.
1857 i_arpainet (i_arpainet.U):
1858 This variable conditionally defines the I_ARPA_INET symbol,
1859 and indicates whether a C program should include <arpa/inet.h>.
1861 i_bsdioctl (i_sysioctl.U):
1862 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1863 indicates to the C program that <sys/bsdioctl.h> exists and should
1867 This variable conditionally defines the I_DB symbol, and indicates
1868 whether a C program may include Berkeley's DB include file <db.h>.
1871 This variable conditionally defines the I_DBM symbol, which
1872 indicates to the C program that <dbm.h> exists and should
1875 i_dirent (i_dirent.U):
1876 This variable conditionally defines I_DIRENT, which indicates
1877 to the C program that it should include <dirent.h>.
1880 This variable conditionally defines the I_DLD symbol, which
1881 indicates to the C program that <dld.h> (GNU dynamic loading)
1882 exists and should be included.
1884 i_dlfcn (i_dlfcn.U):
1885 This variable conditionally defines the I_DLFCN symbol, which
1886 indicates to the C program that <dlfcn.h> exists and should
1889 i_fcntl (i_fcntl.U):
1890 This variable controls the value of I_FCNTL (which tells
1891 the C program to include <fcntl.h>).
1893 i_float (i_float.U):
1894 This variable conditionally defines the I_FLOAT symbol, and indicates
1895 whether a C program may include <float.h> to get symbols like DBL_MAX
1896 or DBL_MIN, i.e. machine dependent floating point values.
1899 This variable conditionally defines the I_GDBM symbol, which
1900 indicates to the C program that <gdbm.h> exists and should
1904 This variable conditionally defines the I_GRP symbol, and indicates
1905 whether a C program should include <grp.h>.
1907 i_iconv (i_iconv.U):
1908 This variable conditionally defines the I_ICONV symbol, and indicates
1909 whether a C program should include <iconv.h>.
1911 i_inttypes (i_inttypes.U):
1912 This variable conditionally defines the I_INTTYPES symbol,
1913 and indicates whether a C program should include <inttypes.h>.
1915 i_limits (i_limits.U):
1916 This variable conditionally defines the I_LIMITS symbol, and indicates
1917 whether a C program may include <limits.h> to get symbols like WORD_BIT
1920 i_locale (i_locale.U):
1921 This variable conditionally defines the I_LOCALE symbol,
1922 and indicates whether a C program should include <locale.h>.
1924 i_machcthr (i_machcthr.U):
1925 This variable conditionally defines the I_MACH_CTHREADS symbol,
1926 and indicates whether a C program should include <mach/cthreads.h>.
1928 i_malloc (i_malloc.U):
1929 This variable conditionally defines the I_MALLOC symbol, and indicates
1930 whether a C program should include <malloc.h>.
1933 This variable conditionally defines the I_MATH symbol, and indicates
1934 whether a C program may include <math.h>.
1936 i_memory (i_memory.U):
1937 This variable conditionally defines the I_MEMORY symbol, and indicates
1938 whether a C program should include <memory.h>.
1940 i_mntent (i_mntent.U):
1941 This variable conditionally defines the I_MNTENT symbol, and indicates
1942 whether a C program should include <mntent.h>.
1945 This variable conditionally defines the I_NDBM symbol, which
1946 indicates to the C program that <ndbm.h> exists and should
1949 i_netdb (i_netdb.U):
1950 This variable conditionally defines the I_NETDB symbol, and indicates
1951 whether a C program should include <netdb.h>.
1953 i_neterrno (i_neterrno.U):
1954 This variable conditionally defines the I_NET_ERRNO symbol, which
1955 indicates to the C program that <net/errno.h> exists and should
1958 i_netinettcp (i_netinettcp.U):
1959 This variable conditionally defines the I_NETINET_TCP symbol,
1960 and indicates whether a C program should include <netinet/tcp.h>.
1963 This variable conditionally defines I_NETINET_IN, which indicates
1964 to the C program that it should include <netinet/in.h>. Otherwise,
1965 you may try <sys/in.h>.
1968 This variable conditionally defines the I_POLL symbol, and indicates
1969 whether a C program should include <poll.h>.
1971 i_pthread (i_pthread.U):
1972 This variable conditionally defines the I_PTHREAD symbol,
1973 and indicates whether a C program should include <pthread.h>.
1976 This variable conditionally defines I_PWD, which indicates
1977 to the C program that it should include <pwd.h>.
1979 i_rpcsvcdbm (i_dbm.U):
1980 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1981 indicates to the C program that <rpcsvc/dbm.h> exists and should
1982 be included. Some System V systems might need this instead of <dbm.h>.
1985 This variable conditionally defines the I_SFIO symbol,
1986 and indicates whether a C program should include <sfio.h>.
1988 i_sgtty (i_termio.U):
1989 This variable conditionally defines the I_SGTTY symbol, which
1990 indicates to the C program that it should include <sgtty.h> rather
1993 i_shadow (i_shadow.U):
1994 This variable conditionally defines the I_SHADOW symbol, and indicates
1995 whether a C program should include <shadow.h>.
1997 i_socks (i_socks.U):
1998 This variable conditionally defines the I_SOCKS symbol, and indicates
1999 whether a C program should include <socks.h>.
2001 i_stdarg (i_varhdr.U):
2002 This variable conditionally defines the I_STDARG symbol, which
2003 indicates to the C program that <stdarg.h> exists and should
2006 i_stddef (i_stddef.U):
2007 This variable conditionally defines the I_STDDEF symbol, which
2008 indicates to the C program that <stddef.h> exists and should
2011 i_stdlib (i_stdlib.U):
2012 This variable conditionally defines the I_STDLIB symbol, which
2013 indicates to the C program that <stdlib.h> exists and should
2016 i_string (i_string.U):
2017 This variable conditionally defines the I_STRING symbol, which
2018 indicates that <string.h> should be included rather than <strings.h>.
2020 i_sysaccess (i_sysaccess.U):
2021 This variable conditionally defines the I_SYS_ACCESS symbol,
2022 and indicates whether a C program should include <sys/access.h>.
2024 i_sysdir (i_sysdir.U):
2025 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2026 whether a C program should include <sys/dir.h>.
2028 i_sysfile (i_sysfile.U):
2029 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2030 whether a C program should include <sys/file.h> to get R_OK and friends.
2032 i_sysfilio (i_sysioctl.U):
2033 This variable conditionally defines the I_SYS_FILIO symbol, which
2034 indicates to the C program that <sys/filio.h> exists and should
2035 be included in preference to <sys/ioctl.h>.
2038 This variable conditionally defines I_SYS_IN, which indicates
2039 to the C program that it should include <sys/in.h> instead of
2042 i_sysioctl (i_sysioctl.U):
2043 This variable conditionally defines the I_SYS_IOCTL symbol, which
2044 indicates to the C program that <sys/ioctl.h> exists and should
2047 i_syslog (i_syslog.U):
2048 This variable conditionally defines the I_SYSLOG symbol,
2049 and indicates whether a C program should include <syslog.h>.
2051 i_sysmman (i_sysmman.U):
2052 This variable conditionally defines the I_SYS_MMAN symbol, and
2053 indicates whether a C program should include <sys/mman.h>.
2055 i_sysmode (i_sysmode.U):
2056 This variable conditionally defines the I_SYSMODE symbol,
2057 and indicates whether a C program should include <sys/mode.h>.
2059 i_sysmount (i_sysmount.U):
2060 This variable conditionally defines the I_SYSMOUNT symbol,
2061 and indicates whether a C program should include <sys/mount.h>.
2063 i_sysndir (i_sysndir.U):
2064 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2065 whether a C program should include <sys/ndir.h>.
2067 i_sysparam (i_sysparam.U):
2068 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2069 whether a C program should include <sys/param.h>.
2071 i_sysresrc (i_sysresrc.U):
2072 This variable conditionally defines the I_SYS_RESOURCE symbol,
2073 and indicates whether a C program should include <sys/resource.h>.
2075 i_syssecrt (i_syssecrt.U):
2076 This variable conditionally defines the I_SYS_SECURITY symbol,
2077 and indicates whether a C program should include <sys/security.h>.
2079 i_sysselct (i_sysselct.U):
2080 This variable conditionally defines I_SYS_SELECT, which indicates
2081 to the C program that it should include <sys/select.h> in order to
2082 get the definition of struct timeval.
2084 i_syssockio (i_sysioctl.U):
2085 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2086 C program that socket ioctl codes may be found in <sys/sockio.h>
2087 instead of <sys/ioctl.h>.
2089 i_sysstat (i_sysstat.U):
2090 This variable conditionally defines the I_SYS_STAT symbol,
2091 and indicates whether a C program should include <sys/stat.h>.
2093 i_sysstatfs (i_sysstatfs.U):
2094 This variable conditionally defines the I_SYSSTATFS symbol,
2095 and indicates whether a C program should include <sys/statfs.h>.
2097 i_sysstatvfs (i_sysstatvfs.U):
2098 This variable conditionally defines the I_SYSSTATVFS symbol,
2099 and indicates whether a C program should include <sys/statvfs.h>.
2101 i_systime (i_time.U):
2102 This variable conditionally defines I_SYS_TIME, which indicates
2103 to the C program that it should include <sys/time.h>.
2105 i_systimek (i_time.U):
2106 This variable conditionally defines I_SYS_TIME_KERNEL, which
2107 indicates to the C program that it should include <sys/time.h>
2108 with KERNEL defined.
2110 i_systimes (i_systimes.U):
2111 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2112 whether a C program should include <sys/times.h>.
2114 i_systypes (i_systypes.U):
2115 This variable conditionally defines the I_SYS_TYPES symbol,
2116 and indicates whether a C program should include <sys/types.h>.
2118 i_sysuio (i_sysuio.U):
2119 This variable conditionally defines the I_SYSUIO symbol, and indicates
2120 whether a C program should include <sys/uio.h>.
2122 i_sysun (i_sysun.U):
2123 This variable conditionally defines I_SYS_UN, which indicates
2124 to the C program that it should include <sys/un.h> to get UNIX
2125 domain socket definitions.
2127 i_sysutsname (i_sysutsname.U):
2128 This variable conditionally defines the I_SYSUTSNAME symbol,
2129 and indicates whether a C program should include <sys/utsname.h>.
2131 i_sysvfs (i_sysvfs.U):
2132 This variable conditionally defines the I_SYSVFS symbol,
2133 and indicates whether a C program should include <sys/vfs.h>.
2135 i_syswait (i_syswait.U):
2136 This variable conditionally defines I_SYS_WAIT, which indicates
2137 to the C program that it should include <sys/wait.h>.
2139 i_termio (i_termio.U):
2140 This variable conditionally defines the I_TERMIO symbol, which
2141 indicates to the C program that it should include <termio.h> rather
2144 i_termios (i_termio.U):
2145 This variable conditionally defines the I_TERMIOS symbol, which
2146 indicates to the C program that the POSIX <termios.h> file is
2150 This variable conditionally defines I_TIME, which indicates
2151 to the C program that it should include <time.h>.
2153 i_unistd (i_unistd.U):
2154 This variable conditionally defines the I_UNISTD symbol, and indicates
2155 whether a C program should include <unistd.h>.
2157 i_ustat (i_ustat.U):
2158 This variable conditionally defines the I_USTAT symbol, and indicates
2159 whether a C program should include <ustat.h>.
2161 i_utime (i_utime.U):
2162 This variable conditionally defines the I_UTIME symbol, and indicates
2163 whether a C program should include <utime.h>.
2165 i_values (i_values.U):
2166 This variable conditionally defines the I_VALUES symbol, and indicates
2167 whether a C program may include <values.h> to get symbols like MAXLONG
2170 i_varargs (i_varhdr.U):
2171 This variable conditionally defines I_VARARGS, which indicates
2172 to the C program that it should include <varargs.h>.
2174 i_varhdr (i_varhdr.U):
2175 Contains the name of the header to be included to get va_dcl definition.
2176 Typically one of varargs.h or stdarg.h.
2178 i_vfork (i_vfork.U):
2179 This variable conditionally defines the I_VFORK symbol, and indicates
2180 whether a C program should include vfork.h.
2182 ignore_versioned_solibs (libs.U):
2183 This variable should be non-empty if non-versioned shared
2184 libraries (libfoo.so.x.y) are to be ignored (because they
2185 cannot be linked against).
2187 inc_version_list (inc_version_list.U):
2188 This variable specifies the list of subdirectories in over
2189 which perl.c:incpush() and lib/lib.pm will automatically
2190 search when adding directories to @INC. The elements in
2191 the list are separated by spaces. This is only useful
2192 if you have a perl library directory tree structured like the
2193 default one. See INSTALL for how this works. The versioned
2194 site_perl directory was introduced in 5.005, so that is the
2195 lowest possible value.
2197 inc_version_list_init (inc_version_list.U):
2198 This variable holds the same list as inc_version_list, but
2199 each item is enclosed in double quotes and separated by commas,
2200 suitable for use in the PERL_INC_VERSION_LIST initialization.
2203 This variable must preceed the normal include path to get hte
2204 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2205 Value can be "" or "/bsd43" on mips.
2208 This variable is defined but not used by Configure.
2209 The value is a plain '' and is not useful.
2211 installarchlib (archlib.U):
2212 This variable is really the same as archlibexp but may differ on
2213 those systems using AFS. For extra portability, only this variable
2214 should be used in makefiles.
2217 This variable is the same as binexp unless AFS is running in which case
2218 the user is explicitely prompted for it. This variable should always
2219 be used in your makefiles for maximum portability.
2221 installman1dir (man1dir.U):
2222 This variable is really the same as man1direxp, unless you are using
2223 AFS in which case it points to the read/write location whereas
2224 man1direxp only points to the read-only access location. For extra
2225 portability, you should only use this variable within your makefiles.
2227 installman3dir (man3dir.U):
2228 This variable is really the same as man3direxp, unless you are using
2229 AFS in which case it points to the read/write location whereas
2230 man3direxp only points to the read-only access location. For extra
2231 portability, you should only use this variable within your makefiles.
2233 installprefix (installprefix.U):
2234 This variable holds the name of the directory below which
2235 "make install" will install the package. For most users, this
2236 is the same as prefix. However, it is useful for
2237 installing the software into a different (usually temporary)
2238 location after which it can be bundled up and moved somehow
2239 to the final location specified by prefix.
2241 installprefixexp (installprefix.U):
2242 This variable holds the full absolute path of installprefix
2243 with all ~-expansion done.
2245 installprivlib (privlib.U):
2246 This variable is really the same as privlibexp but may differ on
2247 those systems using AFS. For extra portability, only this variable
2248 should be used in makefiles.
2250 installscript (scriptdir.U):
2251 This variable is usually the same as scriptdirexp, unless you are on
2252 a system running AFS, in which case they may differ slightly. You
2253 should always use this variable within your makefiles for portability.
2255 installsitearch (sitearch.U):
2256 This variable is really the same as sitearchexp but may differ on
2257 those systems using AFS. For extra portability, only this variable
2258 should be used in makefiles.
2260 installsitebin (sitebin.U):
2261 This variable is usually the same as sitebinexp, unless you are on
2262 a system running AFS, in which case they may differ slightly. You
2263 should always use this variable within your makefiles for portability.
2265 installsitelib (sitelib.U):
2266 This variable is really the same as sitelibexp but may differ on
2267 those systems using AFS. For extra portability, only this variable
2268 should be used in makefiles.
2270 installstyle (installstyle.U):
2271 This variable describes the "style" of the perl installation.
2272 This is intended to be useful for tools that need to
2273 manipulate entire perl distributions. Perl itself doesn't use
2274 this to find its libraries -- the library directories are
2275 stored directly in Config.pm. Currently, there are only two
2276 styles: "lib" and "lib/perl5". The default library locations
2277 (e.g. privlib, sitelib) are either $prefix/lib or
2278 $prefix/lib/perl5. The former is useful if $prefix is a
2279 directory dedicated to perl (e.g. /opt/perl), while the latter
2280 is useful if $prefix is shared by many packages, e.g. if
2282 This may later be extended to include other information, so
2283 be careful with pattern-matching on the results.
2284 For compatibility with perl5.005 and earlier, the default
2285 setting is based on whether or not $prefix contains the string
2288 installusrbinperl (instubperl.U):
2289 This variable tells whether Perl should be installed also as
2290 /usr/bin/perl in addition to
2293 installvendorbin (vendorbin.U):
2294 This variable is really the same as vendorbinexp but may differ on
2295 those systems using AFS. For extra portability, only this variable
2296 should be used in makefiles.
2298 installvendorlib (vendorlib.U):
2299 This variable is really the same as vendorlibexp but may differ on
2300 those systems using AFS. For extra portability, only this variable
2301 should be used in makefiles.
2303 intsize (intsize.U):
2304 This variable contains the value of the INTSIZE symbol, which
2305 indicates to the C program how many bytes there are in an int.
2307 ivdformat (perlxvf.U):
2308 This variable contains the format string used for printing
2309 a Perl IV as a signed decimal integer.
2312 This variable is the size of an IV in bytes.
2315 This variable contains the C type used for Perl's IV.
2317 known_extensions (Extensions.U):
2318 This variable holds a list of all XS extensions included in
2322 This variable is defined but not used by Configure.
2323 The value is a plain '' and is not useful.
2326 This variable contains a flag which will tell the C compiler and loader
2327 to produce a program running with a large memory model. It is up to
2328 the Makefile to use this.
2331 This variable indicates the program to be used to link
2332 libraries for dynamic loading. On some systems, it is 'ld'.
2333 On ELF systems, it should be $cc. Mostly, we'll try to respect
2334 the hint file setting.
2336 lddlflags (dlsrc.U):
2337 This variable contains any special flags that might need to be
2338 passed to $ld to create a shared library suitable for dynamic
2339 loading. It is up to the makefile to use it. For hpux, it
2340 should be '-b'. For sunos 4.1, it is empty.
2342 ldflags (ccflags.U):
2343 This variable contains any additional C loader flags desired by
2344 the user. It is up to the Makefile to use this.
2346 ldlibpthname (libperl.U):
2347 This variable holds the name of the shared library
2348 search path, often LD_LIBRARY_PATH. To get an empty
2349 string, the hints file must set this to 'none'.
2352 This variable is used internally by Configure to determine the
2353 full pathname (if any) of the less program. After Configure runs,
2354 the value is reset to a plain "less" and is not useful.
2357 This is an old synonym for _a.
2360 This variable contains the location of the C library.
2362 libperl (libperl.U):
2363 The perl executable is obtained by linking perlmain.c with
2364 libperl, any static extensions (usually just DynaLoader),
2365 and any other libraries needed on this system. libperl
2366 is usually libperl.a, but can also be libperl.so.xxx if
2367 the user wishes to build a perl executable with a shared
2371 This variable holds the general path (space-separated) used to find
2372 libraries. It is intended to be used by other units.
2375 This variable holds the additional libraries we want to use.
2376 It is up to the Makefile to deal with it.
2379 This variable holds the directory names aka dirnames of the libraries
2380 we found and accepted, duplicates are removed.
2383 This variable holds the filenames aka basenames of the libraries
2384 we found and accepted.
2387 This variable holds the full pathnames of the libraries
2388 we found and accepted.
2391 This variable holds the directory names probed for libraries.
2393 libswanted (Myinit.U):
2394 This variable holds a list of all the libraries we want to
2395 search. The order is chosen to pick up the c library
2396 ahead of ucb or bsd libraries for SVR4.
2399 This variable is defined but not used by Configure.
2400 The value is a plain '' and is not useful.
2403 This variable is defined but not used by Configure.
2404 The value is a plain '' and is not useful.
2406 lkflags (ccflags.U):
2407 This variable contains any additional C partial linker flags desired by
2408 the user. It is up to the Makefile to use this.
2411 This variable is used internally by Configure to determine the
2412 full pathname (if any) of the ln program. After Configure runs,
2413 the value is reset to a plain "ln" and is not useful.
2416 This variable holds the name of the command to make
2417 symbolic links (if they are supported). It can be used
2418 in the Makefile. It is either 'ln -s' or 'ln'
2420 locincpth (ccflags.U):
2421 This variable contains a list of additional directories to be
2422 searched by the compiler. The appropriate '-I' directives will
2423 be added to ccflags. This is intended to simplify setting
2424 local directories from the Configure command line.
2425 It's not much, but it parallels the loclibpth stuff in libpth.U.
2427 loclibpth (libpth.U):
2428 This variable holds the paths (space-separated) used to find local
2429 libraries. It is prepended to libpth, and is intended to be easily
2430 set from the command line.
2432 longdblsize (d_longdbl.U):
2433 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2434 indicates to the C program how many bytes there are in a long double,
2435 if this system supports long doubles.
2437 longlongsize (d_longlong.U):
2438 This variable contains the value of the LONGLONGSIZE symbol, which
2439 indicates to the C program how many bytes there are in a long long,
2440 if this system supports long long.
2442 longsize (intsize.U):
2443 This variable contains the value of the LONGSIZE symbol, which
2444 indicates to the C program how many bytes there are in a long.
2447 This variable is defined but not used by Configure.
2448 The value is a plain '' and is not useful.
2451 This variable is defined but not used by Configure.
2452 The value is a plain '' and is not useful.
2455 This variable is used internally by Configure to determine the
2456 full pathname (if any) of the ls program. After Configure runs,
2457 the value is reset to a plain "ls" and is not useful.
2459 lseeksize (lseektype.U):
2460 This variable defines lseektype to be something like off_t, long,
2461 or whatever type is used to declare lseek offset's type in the
2462 kernel (which also appears to be lseek's return type).
2464 lseektype (lseektype.U):
2465 This variable defines lseektype to be something like off_t, long,
2466 or whatever type is used to declare lseek offset's type in the
2467 kernel (which also appears to be lseek's return type).
2470 This variable is defined but not used by Configure.
2471 The value is a plain '' and is not useful.
2474 This variable is defined but not used by Configure.
2475 The value is a plain '' and is not useful.
2478 This variable is used internally by Configure to determine the
2479 full pathname (if any) of the make program. After Configure runs,
2480 the value is reset to a plain "make" and is not useful.
2482 make_set_make (make.U):
2483 Some versions of 'make' set the variable MAKE. Others do not.
2484 This variable contains the string to be included in Makefile.SH
2485 so that MAKE is set if needed, and not if not needed.
2486 Possible values are:
2487 make_set_make='#' # If your make program handles this for you,
2488 make_set_make="MAKE=$make" # if it doesn't.
2489 I used a comment character so that we can distinguish a
2490 'set' value (from a previous config.sh or Configure '-D' option)
2491 from an uncomputed value.
2493 mallocobj (mallocsrc.U):
2494 This variable contains the name of the malloc.o that this package
2495 generates, if that malloc.o is preferred over the system malloc.
2496 Otherwise the value is null. This variable is intended for generating
2497 Makefiles. See mallocsrc.
2499 mallocsrc (mallocsrc.U):
2500 This variable contains the name of the malloc.c that comes with
2501 the package, if that malloc.c is preferred over the system malloc.
2502 Otherwise the value is null. This variable is intended for generating
2505 malloctype (mallocsrc.U):
2506 This variable contains the kind of ptr returned by malloc and realloc.
2508 man1dir (man1dir.U):
2509 This variable contains the name of the directory in which manual
2510 source pages are to be put. It is the responsibility of the
2511 Makefile.SH to get the value of this into the proper command.
2512 You must be prepared to do the ~name expansion yourself.
2514 man1direxp (man1dir.U):
2515 This variable is the same as the man1dir variable, but is filename
2516 expanded at configuration time, for convenient use in makefiles.
2518 man1ext (man1dir.U):
2519 This variable contains the extension that the manual page should
2520 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2523 man3dir (man3dir.U):
2524 This variable contains the name of the directory in which manual
2525 source pages are to be put. It is the responsibility of the
2526 Makefile.SH to get the value of this into the proper command.
2527 You must be prepared to do the ~name expansion yourself.
2529 man3direxp (man3dir.U):
2530 This variable is the same as the man3dir variable, but is filename
2531 expanded at configuration time, for convenient use in makefiles.
2533 man3ext (man3dir.U):
2534 This variable contains the extension that the manual page should
2535 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2539 This variable is used internally by Configure to determine the
2540 full pathname (if any) of the Mcc program. After Configure runs,
2541 the value is reset to a plain "Mcc" and is not useful.
2544 This variable contains a flag which will tell the C compiler and loader
2545 to produce a program running with a medium memory model. If the
2546 medium model is not supported, contains the flag to produce large
2547 model programs. It is up to the Makefile to use this.
2549 mips_type (usrinc.U):
2550 This variable holds the environment type for the mips system.
2551 Possible values are "BSD 4.3" and "System V".
2554 This variable is used internally by Configure to determine the
2555 full pathname (if any) of the mkdir program. After Configure runs,
2556 the value is reset to a plain "mkdir" and is not useful.
2558 mmaptype (d_mmap.U):
2559 This symbol contains the type of pointer returned by mmap()
2560 (and simultaneously the type of the first argument).
2561 It can be 'void *' or 'caddr_t'.
2564 This variable contains the list of memory models supported by this
2565 system. Possible component values are none, split, unsplit, small,
2566 medium, large, and huge. The component values are space separated.
2568 modetype (modetype.U):
2569 This variable defines modetype to be something like mode_t,
2570 int, unsigned short, or whatever type is used to declare file
2571 modes for system calls.
2574 This variable is used internally by Configure to determine the
2575 full pathname (if any) of the more program. After Configure runs,
2576 the value is reset to a plain "more" and is not useful.
2578 multiarch (multiarch.U):
2579 This variable conditionally defines the MULTIARCH symbol
2580 which signifies the presence of multiplatform files.
2581 This is normally set by hints files.
2584 This variable is defined but not used by Configure.
2585 The value is a plain '' and is not useful.
2587 myarchname (archname.U):
2588 This variable holds the architecture name computed by Configure in
2589 a previous run. It is not intended to be perused by any user and
2590 should never be set in a hint file.
2592 mydomain (myhostname.U):
2593 This variable contains the eventual value of the MYDOMAIN symbol,
2594 which is the domain of the host the program is going to run on.
2595 The domain must be appended to myhostname to form a complete host name.
2596 The dot comes with mydomain, and need not be supplied by the program.
2598 myhostname (myhostname.U):
2599 This variable contains the eventual value of the MYHOSTNAME symbol,
2600 which is the name of the host the program is going to run on.
2601 The domain is not kept with hostname, but must be gotten from mydomain.
2602 The dot comes with mydomain, and need not be supplied by the program.
2604 myuname (Oldconfig.U):
2605 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2606 pseudo variables assignments in the output are stripped, thank you. The
2607 whole thing is then lower-cased.
2610 This variable contains the '-n' flag if that is what causes the echo
2611 command to suppress newline. Otherwise it is null. Correct usage is
2612 $echo $n "prompt for a question: $c".
2614 netdb_hlen_type (netdbtype.U):
2615 This variable holds the type used for the 2nd argument to
2616 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2617 This is only useful if you have gethostbyaddr(), naturally.
2619 netdb_host_type (netdbtype.U):
2620 This variable holds the type used for the 1st argument to
2621 gethostbyaddr(). Usually, this is char * or void *, possibly
2622 with or without a const prefix.
2623 This is only useful if you have gethostbyaddr(), naturally.
2625 netdb_name_type (netdbtype.U):
2626 This variable holds the type used for the argument to
2627 gethostbyname(). Usually, this is char * or const char *.
2628 This is only useful if you have gethostbyname(), naturally.
2630 netdb_net_type (netdbtype.U):
2631 This variable holds the type used for the 1st argument to
2632 getnetbyaddr(). Usually, this is int or long.
2633 This is only useful if you have getnetbyaddr(), naturally.
2636 This variable is used internally by Configure to determine the
2637 full pathname (if any) of the nm program. After Configure runs,
2638 the value is reset to a plain "nm" and is not useful.
2641 This variable holds the options that may be necessary for nm.
2643 nm_so_opt (usenm.U):
2644 This variable holds the options that may be necessary for nm
2645 to work on a shared library but that can not be used on an
2646 archive library. Currently, this is only used by Linux, where
2647 nm --dynamic is *required* to get symbols from an ELF library which
2648 has been stripped, but nm --dynamic is *fatal* on an archive library.
2649 Maybe Linux should just always set usenm=false.
2651 nonxs_ext (Extensions.U):
2652 This variable holds a list of all non-xs extensions included
2653 in the package. All of them will be built.
2656 This variable is used internally by Configure to determine the
2657 full pathname (if any) of the nroff program. After Configure runs,
2658 the value is reset to a plain "nroff" and is not useful.
2661 This variable is the size of an NV in bytes.
2664 This variable contains the C type used for Perl's NV.
2666 o_nonblock (nblock_io.U):
2667 This variable bears the symbol value to be used during open() or fcntl()
2668 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2669 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2670 but that is only supported by some devices.
2673 This is an old synonym for _o.
2675 old_pthread_create_joinable (d_pthrattrj.U):
2676 This variable defines the constant to use for creating joinable
2677 (aka undetached) pthreads. Unused if pthread.h defines
2678 PTHREAD_CREATE_JOINABLE. If used, possible values are
2679 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2681 optimize (ccflags.U):
2682 This variable contains any optimizer/debugger flag that should be used.
2683 It is up to the Makefile to use it.
2685 orderlib (orderlib.U):
2686 This variable is "true" if the components of libraries must be ordered
2687 (with `lorder $* | tsort`) before placing them in an archive. Set to
2688 "false" if ranlib or ar can generate random libraries.
2690 osname (Oldconfig.U):
2691 This variable contains the operating system name (e.g. sunos,
2692 solaris, hpux, etc.). It can be useful later on for setting
2693 defaults. Any spaces are replaced with underscores. It is set
2694 to a null string if we can't figure it out.
2696 osvers (Oldconfig.U):
2697 This variable contains the operating system version (e.g.
2698 4.1.3, 5.2, etc.). It is primarily used for helping select
2699 an appropriate hints file, but might be useful elsewhere for
2700 setting defaults. It is set to '' if we can't figure it out.
2701 We try to be flexible about how much of the version number
2702 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2703 same for this package, hints files might just be os_4.0 or
2704 os_4.1, etc., not keeping separate files for each little release.
2706 package (package.U):
2707 This variable contains the name of the package being constructed.
2708 It is primarily intended for the use of later Configure units.
2711 This variable contains the name of the preferred pager on the system.
2712 Usual values are (the full pathnames of) more, less, pg, or cat.
2715 This variable contains a command that produces the text of the
2716 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2717 "ypcat passwd" when NIS is used.
2718 On some systems, such as os390, there may be no equivalent
2719 command, in which case this variable is unset.
2721 patchlevel (patchlevel.U):
2722 The patchlevel level of this package.
2723 The value of patchlevel comes from the patchlevel.h file.
2724 In a version number such as 5.6.1, this is the "6".
2725 In patchlevel.h, this is referred to as the "PERL_VERSION".
2728 This is an old synonym for p_ in Head.U, the character
2729 used to separate elements in the command shell search PATH.
2732 This variable is used internally by Configure to determine the
2733 full pathname (if any) of the perl program. After Configure runs,
2734 the value is reset to a plain "perl" and is not useful.
2736 PERL_REVISION (Oldsyms.U):
2737 In a Perl version number such as 5.6.2, this is the 5.
2738 This value is manually set in patchlevel.h
2740 PERL_SUBVERSION (Oldsyms.U):
2741 In a Perl version number such as 5.6.2, this is the 2.
2742 Values greater than 50 represent potentially unstable
2743 development subversions.
2744 This value is manually set in patchlevel.h
2746 PERL_VERSION (Oldsyms.U):
2747 In a Perl version number such as 5.6.2, this is the 6.
2748 This value is manually set in patchlevel.h
2750 perladmin (perladmin.U):
2751 Electronic mail address of the perl5 administrator.
2753 perlpath (perlpath.U):
2754 This variable contains the eventual value of the PERLPATH symbol,
2755 which contains the name of the perl interpreter to be used in
2756 shell scripts and in the "eval 'exec'" idiom.
2759 This variable is used internally by Configure to determine the
2760 full pathname (if any) of the pg program. After Configure runs,
2761 the value is reset to a plain "pg" and is not useful.
2763 phostname (myhostname.U):
2764 This variable contains the eventual value of the PHOSTNAME symbol,
2765 which is a command that can be fed to popen() to get the host name.
2766 The program should probably not presume that the domain is or isn't
2769 pidtype (pidtype.U):
2770 This variable defines PIDTYPE to be something like pid_t, int,
2771 ushort, or whatever type is used to declare process ids in the kernel.
2774 Holds the private path used by Configure to find out the libraries.
2775 Its value is prepend to libpth. This variable takes care of special
2776 machines, like the mips. Usually, it should be empty.
2778 pm_apiversion (xs_apiversion.U):
2779 This variable contains the version of the oldest perl
2780 compatible with the present perl. (That is, pure perl modules
2781 written for $pm_apiversion will still work for the current
2782 version). perl.c:incpush() and lib/lib.pm will automatically
2783 search in $sitelib for older directories across major versions
2784 back to pm_apiversion. This is only useful if you have a perl
2785 library directory tree structured like the default one. The
2786 versioned site_perl library was introduced in 5.005, so that's
2787 the default setting for this variable. It's hard to imagine
2788 it changing before Perl6. It is included here for symmetry
2789 with xs_apiveprsion -- the searching algorithms will
2790 (presumably) be similar.
2791 See the INSTALL file for how this works.
2794 This variable is defined but not used by Configure.
2795 The value is a plain '' and is not useful.
2798 This variable is defined but not used by Configure.
2799 The value is a plain '' and is not useful.
2802 This variable holds the name of the directory below which the
2803 user will install the package. Usually, this is /usr/local, and
2804 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2805 man pages in /usr/local/man, etc. It is only used to set defaults
2806 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2808 prefixexp (prefix.U):
2809 This variable holds the full absolute path of the directory below
2810 which the user will install the package. Derived from prefix.
2812 privlib (privlib.U):
2813 This variable contains the eventual value of the PRIVLIB symbol,
2814 which is the name of the private library for this package. It may
2815 have a ~ on the front. It is up to the makefile to eventually create
2816 this directory while performing installation (with ~ substitution).
2818 privlibexp (privlib.U):
2819 This variable is the ~name expanded version of privlib, so that you
2820 may use it directly in Makefiles or shell scripts.
2822 prototype (prototype.U):
2823 This variable holds the eventual value of CAN_PROTOTYPE, which
2824 indicates the C compiler can handle funciton prototypes.
2826 ptrsize (ptrsize.U):
2827 This variable contains the value of the PTRSIZE symbol, which
2828 indicates to the C program how many bytes there are in a pointer.
2830 quadkind (quadtype.U):
2831 This variable, if defined, encodes the type of a quad:
2832 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2834 quadtype (quadtype.U):
2835 This variable defines Quad_t to be something like long, int,
2836 long long, int64_t, or whatever type is used for 64-bit integers.
2838 randbits (randfunc.U):
2839 Indicates how many bits are produced by the function used to
2840 generate normalized random numbers.
2842 randfunc (randfunc.U):
2843 Indicates the name of the random number function to use.
2844 Values include drand48, random, and rand. In C programs,
2845 the 'Drand01' macro is defined to generate uniformly distributed
2846 random numbers over the range [0., 1.[ (see drand01 and nrand).
2848 randseedtype (randfunc.U):
2849 Indicates the type of the argument of the seedfunc.
2851 ranlib (orderlib.U):
2852 This variable is set to the pathname of the ranlib program, if it is
2853 needed to generate random libraries. Set to ":" if ar can generate
2854 random libraries or if random libraries are not supported
2856 rd_nodata (nblock_io.U):
2857 This variable holds the return code from read() when no data is
2858 present. It should be -1, but some systems return 0 when O_NDELAY is
2859 used, which is a shame because you cannot make the difference between
2860 no data and an EOF.. Sigh!
2863 This variable is used internally by Configure to determine the
2864 full pathname (if any) of the rm program. After Configure runs,
2865 the value is reset to a plain "rm" and is not useful.
2868 This variable is defined but not used by Configure.
2869 The value is a plain '' and is not useful.
2872 This variable contains 'true' or 'false' depending whether the
2873 nm extraction should be performed or not, according to the value
2874 of usenm and the flags on the Configure command line.
2876 sched_yield (d_pthread_y.U):
2877 This variable defines the way to yield the execution
2878 of the current thread.
2880 scriptdir (scriptdir.U):
2881 This variable holds the name of the directory in which the user wants
2882 to put publicly scripts for the package in question. It is either
2883 the same directory as for binaries, or a special one that can be
2884 mounted across different architectures, like /usr/share. Programs
2885 must be prepared to deal with ~name expansion.
2887 scriptdirexp (scriptdir.U):
2888 This variable is the same as scriptdir, but is filename expanded
2889 at configuration time, for programs not wanting to bother with it.
2892 This variable is used internally by Configure to determine the
2893 full pathname (if any) of the sed program. After Configure runs,
2894 the value is reset to a plain "sed" and is not useful.
2896 seedfunc (randfunc.U):
2897 Indicates the random number generating seed function.
2898 Values include srand48, srandom, and srand.
2900 selectminbits (selectminbits.U):
2901 This variable holds the minimum number of bits operated by select.
2902 That is, if you do select(n, ...), how many bits at least will be
2903 cleared in the masks if some activity is detected. Usually this
2904 is either n or 32*ceil(n/32), especially many little-endians do
2905 the latter. This is only useful if you have select(), naturally.
2907 selecttype (selecttype.U):
2908 This variable holds the type used for the 2nd, 3rd, and 4th
2909 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2910 is defined, and 'int *' otherwise. This is only useful if you
2911 have select(), naturally.
2914 This variable is defined but not used by Configure.
2915 The value is a plain '' and is not useful.
2918 This variable contains the full pathname of the shell used
2919 on this system to execute Bourne shell scripts. Usually, this will be
2920 /bin/sh, though it's possible that some systems will have /bin/ksh,
2921 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2923 This unit comes before Options.U, so you can't set sh with a '-D'
2924 option, though you can override this (and startsh)
2925 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2928 This variable is defined but not used by Configure.
2929 The value is a plain '' and is not useful.
2931 sharpbang (spitshell.U):
2932 This variable contains the string #! if this system supports that
2935 shmattype (d_shmat.U):
2936 This symbol contains the type of pointer returned by shmat().
2937 It can be 'void *' or 'char *'.
2939 shortsize (intsize.U):
2940 This variable contains the value of the SHORTSIZE symbol which
2941 indicates to the C program how many bytes there are in a short.
2943 shrpenv (libperl.U):
2944 If the user builds a shared libperl.so, then we need to tell the
2945 'perl' executable where it will be able to find the installed libperl.so.
2946 One way to do this on some systems is to set the environment variable
2947 LD_RUN_PATH to the directory that will be the final location of the
2948 shared libperl.so. The makefile can use this with something like
2949 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2951 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2954 See the main perl Makefile.SH for actual working usage.
2955 Alternatively, we might be able to use a command line option such
2956 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2957 $archlibexp/CORE (Linux).
2959 shsharp (spitshell.U):
2960 This variable tells further Configure units whether your sh can
2963 sig_count (sig_name.U):
2964 This variable holds a number larger than the largest valid
2965 signal number. This is usually the same as the NSIG macro.
2967 sig_name (sig_name.U):
2968 This variable holds the signal names, space separated. The leading
2969 SIG in signal name is removed. A ZERO is prepended to the
2970 list. This is currently not used.
2972 sig_name_init (sig_name.U):
2973 This variable holds the signal names, enclosed in double quotes and
2974 separated by commas, suitable for use in the SIG_NAME definition
2975 below. A "ZERO" is prepended to the list, and the list is
2976 terminated with a plain 0. The leading SIG in signal names
2977 is removed. See sig_num.
2979 sig_num (sig_name.U):
2980 This variable holds the signal numbers, space separated. A ZERO is
2981 prepended to the list (corresponding to the fake SIGZERO), and
2982 the list is terminated with a 0. Those numbers correspond to
2983 the value of the signal listed in the same place within the
2986 sig_num_init (sig_name.U):
2987 This variable holds the signal numbers, enclosed in double quotes and
2988 separated by commas, suitable for use in the SIG_NUM definition
2989 below. A "ZERO" is prepended to the list, and the list is
2990 terminated with a plain 0.
2992 signal_t (d_voidsig.U):
2993 This variable holds the type of the signal handler (void or int).
2995 sitearch (sitearch.U):
2996 This variable contains the eventual value of the SITEARCH symbol,
2997 which is the name of the private library for this package. It may
2998 have a ~ on the front. It is up to the makefile to eventually create
2999 this directory while performing installation (with ~ substitution).
3000 The standard distribution will put nothing in this directory.
3001 After perl has been installed, users may install their own local
3002 architecture-dependent modules in this directory with
3003 MakeMaker Makefile.PL
3004 or equivalent. See INSTALL for details.
3006 sitearchexp (sitearch.U):
3007 This variable is the ~name expanded version of sitearch, so that you
3008 may use it directly in Makefiles or shell scripts.
3010 sitebin (sitebin.U):
3011 This variable holds the name of the directory in which the user wants
3012 to put add-on publicly executable files for the package in question. It
3013 is most often a local directory such as /usr/local/bin. Programs using
3014 this variable must be prepared to deal with ~name substitution.
3015 The standard distribution will put nothing in this directory.
3016 After perl has been installed, users may install their own local
3017 executables in this directory with
3018 MakeMaker Makefile.PL
3019 or equivalent. See INSTALL for details.
3021 sitebinexp (sitebin.U):
3022 This is the same as the sitebin variable, but is filename expanded at
3023 configuration time, for use in your makefiles.
3025 sitelib (sitelib.U):
3026 This variable contains the eventual value of the SITELIB symbol,
3027 which is the name of the private library for this package. It may
3028 have a ~ on the front. It is up to the makefile to eventually create
3029 this directory while performing installation (with ~ substitution).
3030 The standard distribution will put nothing in this directory.
3031 After perl has been installed, users may install their own local
3032 architecture-independent modules in this directory with
3033 MakeMaker Makefile.PL
3034 or equivalent. See INSTALL for details.
3036 sitelibexp (sitelib.U):
3037 This variable is the ~name expanded version of sitelib, so that you
3038 may use it directly in Makefiles or shell scripts.
3040 siteprefix (siteprefix.U):
3041 This variable holds the full absolute path of the directory below
3042 which the user will install add-on packages.
3043 See INSTALL for usage and examples.
3045 siteprefixexp (siteprefix.U):
3046 This variable holds the full absolute path of the directory below
3047 which the user will install add-on packages. Derived from siteprefix.
3049 sizetype (sizetype.U):
3050 This variable defines sizetype to be something like size_t,
3051 unsigned long, or whatever type is used to declare length
3052 parameters for string functions.
3055 This variable is defined but not used by Configure.
3056 The value is a plain '' and is not useful.
3059 This variable is defined but not used by Configure.
3060 The value is a plain '' and is not useful.
3063 This variable contains a flag which will tell the C compiler and loader
3064 to produce a program running with a small memory model. It is up to
3065 the Makefile to use this.
3068 This variable holds the extension used to identify shared libraries
3069 (also known as shared objects) on the system. Usually set to 'so'.
3071 sockethdr (d_socket.U):
3072 This variable has any cpp '-I' flags needed for socket support.
3074 socketlib (d_socket.U):
3075 This variable has the names of any libraries needed for socket support.
3078 This variable is used internally by Configure to determine the
3079 full pathname (if any) of the sort program. After Configure runs,
3080 the value is reset to a plain "sort" and is not useful.
3082 spackage (package.U):
3083 This variable contains the name of the package being constructed,
3084 with the first letter uppercased, i.e. suitable for starting
3087 spitshell (spitshell.U):
3088 This variable contains the command necessary to spit out a runnable
3089 shell on this system. It is either cat or a grep '-v' for # comments.
3092 This variable contains a flag which will tell the C compiler and loader
3093 to produce a program that will run in separate I and D space, for those
3094 machines that support separation of instruction and data space. It is
3095 up to the Makefile to use this.
3097 sPRId64 (quadfio.U):
3098 This variable, if defined, contains the string used by stdio to
3099 format 64-bit decimal numbers (format 'd') for output.
3101 sPRIeldbl (longdblfio.U):
3102 This variable, if defined, contains the string used by stdio to
3103 format long doubles (format 'e') for output.
3105 sPRIEldbl (longdblfio.U):
3106 This variable, if defined, contains the string used by stdio to
3107 format long doubles (format 'E') for output.
3109 sPRIfldbl (longdblfio.U):
3110 This variable, if defined, contains the string used by stdio to
3111 format long doubles (format 'f') for output.
3113 sPRIFldbl (longdblfio.U):
3114 This variable, if defined, contains the string used by stdio to
3115 format long doubles (format 'F') for output.
3117 sPRIgldbl (longdblfio.U):
3118 This variable, if defined, contains the string used by stdio to
3119 format long doubles (format 'g') for output.
3121 sPRIGldbl (longdblfio.U):
3122 This variable, if defined, contains the string used by stdio to
3123 format long doubles (format 'G') for output.
3125 sPRIi64 (quadfio.U):
3126 This variable, if defined, contains the string used by stdio to
3127 format 64-bit decimal numbers (format 'i') for output.
3129 sPRIo64 (quadfio.U):
3130 This variable, if defined, contains the string used by stdio to
3131 format 64-bit octal numbers (format 'o') for output.
3133 sPRIu64 (quadfio.U):
3134 This variable, if defined, contains the string used by stdio to
3135 format 64-bit unsigned decimal numbers (format 'u') for output.
3137 sPRIx64 (quadfio.U):
3138 This variable, if defined, contains the string used by stdio to
3139 format 64-bit hexadecimal numbers (format 'x') for output.
3141 sPRIX64 (quadfio.U):
3142 This variable, if defined, contains the string used by stdio to
3143 format 64-bit hExADECimAl numbers (format 'X') for output.
3146 This variable holds the path to the package source. It is up to
3147 the Makefile to use this variable and set VPATH accordingly to
3148 find the sources remotely.
3150 ssizetype (ssizetype.U):
3151 This variable defines ssizetype to be something like ssize_t,
3152 long or int. It is used by functions that return a count
3153 of bytes or an error condition. It must be a signed type.
3154 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3156 startperl (startperl.U):
3157 This variable contains the string to put on the front of a perl
3158 script to make sure (hopefully) that it runs with perl and not some
3159 shell. Of course, that leading line must be followed by the classical
3161 eval 'exec perl -S $0 ${1+"$@"}'
3162 if $running_under_some_shell;
3163 to guarantee perl startup should the shell execute the script. Note
3164 that this magic incatation is not understood by csh.
3166 startsh (startsh.U):
3167 This variable contains the string to put on the front of a shell
3168 script to make sure (hopefully) that it runs with sh and not some
3171 static_ext (Extensions.U):
3172 This variable holds a list of XS extension files we want to
3173 link statically into the package. It is used by Makefile.
3175 stdchar (stdchar.U):
3176 This variable conditionally defines STDCHAR to be the type of char
3177 used in stdio.h. It has the values "unsigned char" or "char".
3179 stdio_base (d_stdstdio.U):
3180 This variable defines how, given a FILE pointer, fp, to access the
3181 _base field (or equivalent) of stdio.h's FILE structure. This will
3182 be used to define the macro FILE_base(fp).
3184 stdio_bufsiz (d_stdstdio.U):
3185 This variable defines how, given a FILE pointer, fp, to determine
3186 the number of bytes store in the I/O buffer pointer to by the
3187 _base field (or equivalent) of stdio.h's FILE structure. This will
3188 be used to define the macro FILE_bufsiz(fp).
3190 stdio_cnt (d_stdstdio.U):
3191 This variable defines how, given a FILE pointer, fp, to access the
3192 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3193 be used to define the macro FILE_cnt(fp).
3195 stdio_filbuf (d_stdstdio.U):
3196 This variable defines how, given a FILE pointer, fp, to tell
3197 stdio to refill it's internal buffers (?). This will
3198 be used to define the macro FILE_filbuf(fp).
3200 stdio_ptr (d_stdstdio.U):
3201 This variable defines how, given a FILE pointer, fp, to access the
3202 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3203 be used to define the macro FILE_ptr(fp).
3205 stdio_stream_array (stdio_streams.U):
3206 This variable tells the name of the array holding the stdio streams.
3207 Usual values include _iob, __iob, and __sF.
3209 strings (i_string.U):
3210 This variable holds the full path of the string header that will be
3211 used. Typically /usr/include/string.h or /usr/include/strings.h.
3214 This variable is defined but not used by Configure.
3215 The value is a plain '' and is not useful.
3217 subversion (patchlevel.U):
3218 The subversion level of this package.
3219 The value of subversion comes from the patchlevel.h file.
3220 In a version number such as 5.6.1, this is the "1".
3221 This is unique to perl.
3224 This variable holds the place where the manual is located on this
3225 system. It is not the place where the user wants to put his manual
3226 pages. Rather it is the place where Configure may look to find manual
3227 for unix commands (section 1 of the manual usually). See mansrc.
3230 This variable is defined but not used by Configure.
3231 The value is a plain '' and is not useful.
3234 This variable is defined but not used by Configure.
3235 The value is a plain '' and is not useful.
3238 This variable is defined but not used by Configure.
3239 The value is a plain '' and is not useful.
3242 This variable is defined but not used by Configure.
3243 The value is a plain '' and is not useful.
3246 This variable is used internally by Configure to determine the
3247 full pathname (if any) of the test program. After Configure runs,
3248 the value is reset to a plain "test" and is not useful.
3250 timeincl (i_time.U):
3251 This variable holds the full path of the included time header(s).
3253 timetype (d_time.U):
3254 This variable holds the type returned by time(). It can be long,
3255 or time_t on BSD sites (in which case <sys/types.h> should be
3256 included). Anyway, the type Time_t should be used.
3259 This variable is used internally by Configure to determine the
3260 full pathname (if any) of the touch program. After Configure runs,
3261 the value is reset to a plain "touch" and is not useful.
3264 This variable is used internally by Configure to determine the
3265 full pathname (if any) of the tr program. After Configure runs,
3266 the value is reset to a plain "tr" and is not useful.
3269 This variable contains the value to be passed to the tr(1)
3270 command to transliterate a newline. Typical values are
3271 '\012' and '\n'. This is needed for EBCDIC systems where
3272 newline is not necessarily '\012'.
3275 This variable is defined but not used by Configure.
3276 The value is a plain '' and is not useful.
3279 This variable is the size of an U16 in bytes.
3282 This variable contains the C type used for Perl's U16.
3285 This variable is the size of an U32 in bytes.
3288 This variable contains the C type used for Perl's U32.
3291 This variable is the size of an U64 in bytes.
3294 This variable contains the C type used for Perl's U64.
3297 This variable is the size of an U8 in bytes.
3300 This variable contains the C type used for Perl's U8.
3303 This variable contains the format string used for printing a Uid_t.
3305 uidsign (uidsign.U):
3306 This variable contains the signedness of a uidtype.
3307 1 for unsigned, -1 for signed.
3309 uidsize (uidsize.U):
3310 This variable contains the size of a uidtype in bytes.
3312 uidtype (uidtype.U):
3313 This variable defines Uid_t to be something like uid_t, int,
3314 ushort, or whatever type is used to declare user ids in the kernel.
3317 This variable is used internally by Configure to determine the
3318 full pathname (if any) of the uname program. After Configure runs,
3319 the value is reset to a plain "uname" and is not useful.
3322 This variable is used internally by Configure to determine the
3323 full pathname (if any) of the uniq program. After Configure runs,
3324 the value is reset to a plain "uniq" and is not useful.
3326 uquadtype (quadtype.U):
3327 This variable defines Uquad_t to be something like unsigned long,
3328 unsigned int, unsigned long long, uint64_t, or whatever type is
3329 used for 64-bit integers.
3331 use5005threads (usethreads.U):
3332 This variable conditionally defines the USE_5005THREADS symbol,
3333 and indicates that Perl should be built to use the 5.005-based
3334 threading implementation.
3336 use64bits (use64bits.U):
3337 This variable conditionally defines the USE_64_BITS symbol,
3338 and indicates that 64-bit integer types should be used
3342 This variable indicates if the system supports dynamic
3343 loading of some sort. See also dlsrc and dlobj.
3345 useithreads (usethreads.U):
3346 This variable conditionally defines the USE_ITHREADS symbol,
3347 and indicates that Perl should be built to use the interpreter-based
3348 threading implementation.
3350 uselargefiles (uselfs.U):
3351 This variable conditionally defines the USE_LARGE_FILES symbol,
3352 and indicates that large file interfaces should be used when
3353 available. The use64bits symbol will also be turned on if necessary.
3355 uselongdouble (uselongdbl.U):
3356 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3357 and indicates that long doubles should be used when available.
3359 usemorebits (usemorebits.U):
3360 This variable conditionally defines the USE_MORE_BITS symbol,
3361 and indicates that explicit 64-bit interfaces and long doubles
3362 should be used when available.
3364 usemultiplicity (usemultiplicity.U):
3365 This variable conditionally defines the MULTIPLICITY symbol,
3366 and indicates that Perl should be built to use multiplicity.
3368 usemymalloc (mallocsrc.U):
3369 This variable contains y if the malloc that comes with this package
3370 is desired over the system's version of malloc. People often include
3371 special versions of malloc for effiency, but such versions are often
3372 less portable. See also mallocsrc and mallocobj.
3373 If this is 'y', then -lmalloc is removed from $libs.
3376 This variable contains 'true' or 'false' depending whether the
3377 nm extraction is wanted or not.
3379 useopcode (Extensions.U):
3380 This variable holds either 'true' or 'false' to indicate
3381 whether the Opcode extension should be used. The sole
3382 use for this currently is to allow an easy mechanism
3383 for users to skip the Opcode extension from the Configure
3386 useperlio (useperlio.U):
3387 This variable conditionally defines the USE_PERLIO symbol,
3388 and indicates that the PerlIO abstraction should be
3391 useposix (Extensions.U):
3392 This variable holds either 'true' or 'false' to indicate
3393 whether the POSIX extension should be used. The sole
3394 use for this currently is to allow an easy mechanism
3395 for hints files to indicate that POSIX will not compile
3396 on a particular system.
3399 This variable is set to true when the user agrees to use sfio.
3400 It is set to false when sfio is not available or when the user
3401 explicitely requests not to use sfio. It is here primarily so
3402 that command-line settings can override the auto-detection of
3403 d_sfio without running into a "WHOA THERE".
3405 useshrplib (libperl.U):
3406 This variable is set to 'yes' if the user wishes
3407 to build a shared libperl, and 'no' otherwise.
3409 usesocks (usesocks.U):
3410 This variable conditionally defines the USE_SOCKS symbol,
3411 and indicates that Perl should be built to use SOCKS.
3413 usethreads (usethreads.U):
3414 This variable conditionally defines the USE_THREADS symbol,
3415 and indicates that Perl should be built to use threads.
3417 usevendorprefix (vendorprefix.U):
3418 This variable tells whether the vendorprefix
3419 and consequently other vendor* paths are in use.
3421 usevfork (d_vfork.U):
3422 This variable is set to true when the user accepts to use vfork.
3423 It is set to false when no vfork is available or when the user
3424 explicitely requests not to use vfork.
3427 This variable holds the path of the include files, which is
3428 usually /usr/include. It is mainly used by other Configure units.
3431 This variable is defined but not used by Configure.
3432 The value is a plain '' and is not useful.
3434 uvoformat (perlxvf.U):
3435 This variable contains the format string used for printing
3436 a Perl UV as an unsigned octal integer.
3439 This variable is the size of a UV in bytes.
3442 This variable contains the C type used for Perl's UV.
3444 uvuformat (perlxvf.U):
3445 This variable contains the format string used for printing
3446 a Perl UV as an unsigned decimal integer.
3448 uvxformat (perlxvf.U):
3449 This variable contains the format string used for printing
3450 a Perl UV as an unsigned hexadecimal integer.
3452 vendorbin (vendorbin.U):
3453 This variable contains the eventual value of the VENDORBIN symbol.
3454 It may have a ~ on the front.
3455 The standard distribution will put nothing in this directory.
3456 Vendors who distribute perl may wish to place additional
3457 binaries in this directory with
3458 MakeMaker Makefile.PL INSTALLDIRS=vendor
3459 or equivalent. See INSTALL for details.
3461 vendorbinexp (vendorbin.U):
3462 This variable is the ~name expanded version of vendorbin, so that you
3463 may use it directly in Makefiles or shell scripts.
3465 vendorlib (vendorlib.U):
3466 This variable contains the eventual value of the VENDORLIB symbol,
3467 which is the name of the private library for this package.
3468 The standard distribution will put nothing in this directory.
3469 Vendors who distribute perl may wish to place their own
3470 modules in this directory with
3471 MakeMaker Makefile.PL INSTALLDIRS=vendor
3472 or equivalent. See INSTALL for details.
3474 vendorlibexp (vendorlib.U):
3475 This variable is the ~name expanded version of vendorlib, so that you
3476 may use it directly in Makefiles or shell scripts.
3478 vendorprefix (vendorprefix.U):
3479 This variable holds the full absolute path of the directory below
3480 which the vendor will install add-on packages.
3481 See INSTALL for usage and examples.
3483 vendorprefixexp (vendorprefix.U):
3484 This variable holds the full absolute path of the directory below
3485 which the vendor will install add-on packages. Derived from vendorprefix.
3487 version (patchlevel.U):
3488 The full version number of this package, such as 5.6.1 (or 5_6_1).
3489 This combines baserev, patchlevel, and subversion to get the
3490 full version number, including any possible subversions.
3491 This is suitable for use as a directory name, and hence is
3492 filesystem dependent.
3495 This variable is defined but not used by Configure.
3496 The value is a plain '' and is not useful.
3498 voidflags (voidflags.U):
3499 This variable contains the eventual value of the VOIDFLAGS symbol,
3500 which indicates how much support of the void type is given by this
3501 compiler. See VOIDFLAGS for more info.
3504 This variable holds extra path (space-separated) used to find
3505 libraries on this platform, for example CPU-specific libraries
3506 (on multi-CPU platforms) may be listed here.
3508 xs_apiversion (xs_apiversion.U):
3509 This variable contains the version of the oldest perl binary
3510 compatible with the present perl. perl.c:incpush() and
3511 lib/lib.pm will automatically search in $sitearch for older
3512 directories across major versions back to xs_apiversion.
3513 This is only useful if you have a perl library directory tree
3514 structured like the default one.
3515 See INSTALL for how this works.
3516 The versioned site_perl directory was introduced in 5.005,
3517 so that is the lowest possible value.
3518 Since this can depend on compile time options (such as
3519 bincompat) it is set by Configure. Other non-default sources
3520 of potential incompatibility, such as multiplicity, threads,
3521 debugging, 64bits, sfio, etc., are not checked for currently,
3522 though in principle we could go snooping around in old
3526 This variable is defined but not used by Configure.
3527 The value is a plain '' and is not useful.
3530 This variable is used internally by Configure to determine the
3531 full pathname (if any) of the zip program. After Configure runs,
3532 the value is reset to a plain "zip" and is not useful.