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_int64t (d_int64t.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_sockpair (d_socket.U):
1363 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1364 indicates that the BSD socketpair() is supported.
1366 d_sqrtl (d_sqrtl.U):
1367 This variable conditionally defines the HAS_SQRTL symbol, which
1368 indicates to the C program that the sqrtl() routine is available.
1370 d_statblks (d_statblks.U):
1371 This variable conditionally defines USE_STAT_BLOCKS
1372 if this system has a stat structure declaring
1373 st_blksize and st_blocks.
1375 d_statfs_f_flags (d_statfs_f_flags.U):
1376 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1377 symbol, which indicates to struct statfs from has f_flags member.
1378 This kind of struct statfs is coming from sys/mount.h (BSD),
1379 not from sys/statfs.h (SYSV).
1381 d_statfs_s (d_statfs_s.U):
1382 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1383 which indicates that the struct statfs is supported.
1385 d_statvfs (d_statvfs.U):
1386 This variable conditionally defines the HAS_STATVFS symbol, which
1387 indicates to the C program that the statvfs() routine is available.
1389 d_stdio_cnt_lval (d_stdstdio.U):
1390 This variable conditionally defines STDIO_CNT_LVALUE if the
1391 FILE_cnt macro can be used as an lvalue.
1393 d_stdio_ptr_lval (d_stdstdio.U):
1394 This variable conditionally defines STDIO_PTR_LVALUE if the
1395 FILE_ptr macro can be used as an lvalue.
1397 d_stdio_stream_array (stdio_streams.U):
1398 This variable tells whether there is an array holding
1401 d_stdiobase (d_stdstdio.U):
1402 This variable conditionally defines USE_STDIO_BASE if this system
1403 has a FILE structure declaring a usable _base field (or equivalent)
1406 d_stdstdio (d_stdstdio.U):
1407 This variable conditionally defines USE_STDIO_PTR if this system
1408 has a FILE structure declaring usable _ptr and _cnt fields (or
1409 equivalent) in stdio.h.
1411 d_strchr (d_strchr.U):
1412 This variable conditionally defines HAS_STRCHR if strchr() and
1413 strrchr() are available for string searching.
1415 d_strcoll (d_strcoll.U):
1416 This variable conditionally defines HAS_STRCOLL if strcoll() is
1417 available to compare strings using collating information.
1419 d_strctcpy (d_strctcpy.U):
1420 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1421 indicates to the C program that this C compiler knows how to copy
1424 d_strerrm (d_strerror.U):
1425 This variable holds what Strerrr is defined as to translate an error
1426 code condition into an error message string. It could be 'strerror'
1427 or a more complex macro emulating strrror with sys_errlist[], or the
1428 "unknown" string when both strerror and sys_errlist are missing.
1430 d_strerror (d_strerror.U):
1431 This variable conditionally defines HAS_STRERROR if strerror() is
1432 available to translate error numbers to strings.
1434 d_strtod (d_strtod.U):
1435 This variable conditionally defines the HAS_STRTOD symbol, which
1436 indicates to the C program that the strtod() routine is available
1437 to provide better numeric string conversion than atof().
1439 d_strtol (d_strtol.U):
1440 This variable conditionally defines the HAS_STRTOL symbol, which
1441 indicates to the C program that the strtol() routine is available
1442 to provide better numeric string conversion than atoi() and friends.
1444 d_strtold (d_strtold.U):
1445 This variable conditionally defines the HAS_STRTOLD symbol, which
1446 indicates to the C program that the strtold() routine is available.
1448 d_strtoll (d_strtoll.U):
1449 This variable conditionally defines the HAS_STRTOLL symbol, which
1450 indicates to the C program that the strtoll() routine is available.
1452 d_strtoul (d_strtoul.U):
1453 This variable conditionally defines the HAS_STRTOUL symbol, which
1454 indicates to the C program that the strtoul() routine is available
1455 to provide conversion of strings to unsigned long.
1457 d_strtoull (d_strtoull.U):
1458 This variable conditionally defines the HAS_STRTOULL symbol, which
1459 indicates to the C program that the strtoull() routine is available.
1461 d_strtouq (d_strtouq.U):
1462 This variable conditionally defines the HAS_STRTOUQ symbol, which
1463 indicates to the C program that the strtouq() routine is available.
1465 d_strxfrm (d_strxfrm.U):
1466 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1467 available to transform strings.
1469 d_suidsafe (d_dosuid.U):
1470 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1471 if setuid scripts can be secure. This test looks in /dev/fd/.
1473 d_symlink (d_symlink.U):
1474 This variable conditionally defines the HAS_SYMLINK symbol, which
1475 indicates to the C program that the symlink() routine is available
1476 to create symbolic links.
1478 d_syscall (d_syscall.U):
1479 This variable conditionally defines HAS_SYSCALL if syscall() is
1480 available call arbitrary system calls.
1482 d_sysconf (d_sysconf.U):
1483 This variable conditionally defines the HAS_SYSCONF symbol, which
1484 indicates to the C program that the sysconf() routine is available
1485 to determine system related limits and options.
1487 d_sysernlst (d_strerror.U):
1488 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1489 is available to translate error numbers to the symbolic name.
1491 d_syserrlst (d_strerror.U):
1492 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1493 available to translate error numbers to strings.
1495 d_system (d_system.U):
1496 This variable conditionally defines HAS_SYSTEM if system() is
1497 available to issue a shell command.
1499 d_tcgetpgrp (d_tcgtpgrp.U):
1500 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1501 indicates to the C program that the tcgetpgrp() routine is available.
1502 to get foreground process group ID.
1504 d_tcsetpgrp (d_tcstpgrp.U):
1505 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1506 indicates to the C program that the tcsetpgrp() routine is available
1507 to set foreground process group ID.
1509 d_telldir (d_readdir.U):
1510 This variable conditionally defines HAS_TELLDIR if telldir() is
1513 d_telldirproto (d_telldirproto.U):
1514 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1515 which indicates to the C program that the system provides
1516 a prototype for the telldir() function. Otherwise, it is
1517 up to the program to supply one.
1520 This variable conditionally defines the HAS_TIME symbol, which indicates
1521 that the time() routine exists. The time() routine is normaly
1522 provided on UNIX systems.
1524 d_times (d_times.U):
1525 This variable conditionally defines the HAS_TIMES symbol, which indicates
1526 that the times() routine exists. The times() routine is normaly
1527 provided on UNIX systems. You may have to include <sys/times.h>.
1529 d_truncate (d_truncate.U):
1530 This variable conditionally defines HAS_TRUNCATE if truncate() is
1531 available to truncate files.
1533 d_tzname (d_tzname.U):
1534 This variable conditionally defines HAS_TZNAME if tzname[] is
1535 available to access timezone names.
1537 d_umask (d_umask.U):
1538 This variable conditionally defines the HAS_UMASK symbol, which
1539 indicates to the C program that the umask() routine is available.
1540 to set and get the value of the file creation mask.
1542 d_uname (d_gethname.U):
1543 This variable conditionally defines the HAS_UNAME symbol, which
1544 indicates to the C program that the uname() routine may be
1545 used to derive the host name.
1547 d_union_semun (d_union_semun.U):
1548 This variable conditionally defines HAS_UNION_SEMUN if the
1549 union semun is defined by including <sys/sem.h>.
1551 d_ustat (d_ustat.U):
1552 This variable conditionally defines HAS_USTAT if ustat() is
1553 available to query file system statistics by dev_t.
1555 d_vendorbin (vendorbin.U):
1556 This variable conditionally defines PERL_VENDORBIN.
1558 d_vendorlib (vendorlib.U):
1559 This variable conditionally defines PERL_VENDORLIB.
1561 d_vfork (d_vfork.U):
1562 This variable conditionally defines the HAS_VFORK symbol, which
1563 indicates the vfork() routine is available.
1565 d_void_closedir (d_closedir.U):
1566 This variable conditionally defines VOID_CLOSEDIR if closedir()
1567 does not return a value.
1569 d_voidsig (d_voidsig.U):
1570 This variable conditionally defines VOIDSIG if this system
1571 declares "void (*signal(...))()" in signal.h. The old way was to
1572 declare it as "int (*signal(...))()".
1574 d_voidtty (i_sysioctl.U):
1575 This variable conditionally defines USE_IOCNOTTY to indicate that the
1576 ioctl() call with TIOCNOTTY should be used to void tty association.
1577 Otherwise (on USG probably), it is enough to close the standard file
1578 decriptors and do a setpgrp().
1580 d_volatile (d_volatile.U):
1581 This variable conditionally defines the HASVOLATILE symbol, which
1582 indicates to the C program that this C compiler knows about the
1583 volatile declaration.
1585 d_vprintf (d_vprintf.U):
1586 This variable conditionally defines the HAS_VPRINTF symbol, which
1587 indicates to the C program that the vprintf() routine is available
1588 to printf with a pointer to an argument list.
1590 d_wait4 (d_wait4.U):
1591 This variable conditionally defines the HAS_WAIT4 symbol, which
1592 indicates the wait4() routine is available.
1594 d_waitpid (d_waitpid.U):
1595 This variable conditionally defines HAS_WAITPID if waitpid() is
1596 available to wait for child process.
1598 d_wcstombs (d_wcstombs.U):
1599 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1600 indicates to the C program that the wcstombs() routine is available
1601 to convert wide character strings to multibyte strings.
1603 d_wctomb (d_wctomb.U):
1604 This variable conditionally defines the HAS_WCTOMB symbol, which
1605 indicates to the C program that the wctomb() routine is available
1606 to convert a wide character to a multibyte.
1609 This variable conditionally defines the symbol XENIX, which alerts
1610 the C program that it runs under Xenix.
1613 This variable is used internally by Configure to determine the
1614 full pathname (if any) of the date program. After Configure runs,
1615 the value is reset to a plain "date" and is not useful.
1617 db_hashtype (i_db.U):
1618 This variable contains the type of the hash structure element
1619 in the <db.h> header file. In older versions of DB, it was
1620 int, while in newer ones it is u_int32_t.
1622 db_prefixtype (i_db.U):
1623 This variable contains the type of the prefix structure element
1624 in the <db.h> header file. In older versions of DB, it was
1625 int, while in newer ones it is size_t.
1627 defvoidused (voidflags.U):
1628 This variable contains the default value of the VOIDUSED symbol (15).
1630 direntrytype (i_dirent.U):
1631 This symbol is set to 'struct direct' or 'struct dirent' depending on
1632 whether dirent is available or not. You should use this pseudo type to
1633 portably declare your directory entries.
1636 This variable contains the extension that is to be used for the
1637 dynamically loaded modules that perl generaties.
1640 This variable contains the name of the dynamic loading file that
1641 will be used with the package.
1643 doublesize (doublesize.U):
1644 This variable contains the value of the DOUBLESIZE symbol, which
1645 indicates to the C program how many bytes there are in a double.
1647 drand01 (randfunc.U):
1648 Indicates the macro to be used to generate normalized
1649 random numbers. Uses randfunc, often divided by
1650 (double) (((unsigned long) 1 << randbits)) in order to
1651 normalize the result.
1652 In C programs, the macro 'Drand01' is mapped to drand01.
1654 dynamic_ext (Extensions.U):
1655 This variable holds a list of XS extension files we want to
1656 link dynamically into the package. It is used by Makefile.
1658 eagain (nblock_io.U):
1659 This variable bears the symbolic errno code set by read() when no
1660 data is present on the file and non-blocking I/O was enabled (otherwise,
1661 read() blocks naturally).
1664 This variable conditionally defines EBCDIC if this
1665 system uses EBCDIC encoding. Among other things, this
1666 means that the character ranges are not contiguous.
1670 This variable is used internally by Configure to determine the
1671 full pathname (if any) of the echo program. After Configure runs,
1672 the value is reset to a plain "echo" and is not useful.
1675 This variable is used internally by Configure to determine the
1676 full pathname (if any) of the egrep program. After Configure runs,
1677 the value is reset to a plain "egrep" and is not useful.
1680 This variable is defined but not used by Configure.
1681 The value is a plain '' and is not useful.
1684 When running under Eunice this variable contains a command which will
1685 convert a shell script to the proper form of text file for it to be
1686 executable by the shell. On other systems it is a no-op.
1689 This is an old synonym for _exe.
1692 This variable is used internally by Configure to determine the
1693 full pathname (if any) of the expr program. After Configure runs,
1694 the value is reset to a plain "expr" and is not useful.
1696 extensions (Extensions.U):
1697 This variable holds a list of all extension files (both XS and
1698 non-xs linked into the package. It is propagated to Config.pm
1699 and is typically used to test whether a particular extesion
1702 fflushall (fflushall.U):
1703 This symbol, if defined, tells that to flush
1704 all pending stdio output one must loop through all
1705 the stdio file handles stored in an array and fflush them.
1706 Note that if fflushNULL is defined, fflushall will not
1707 even be probed for and will be left undefined.
1709 fflushNULL (fflushall.U):
1710 This symbol, if defined, tells that fflush(NULL) does flush
1711 all pending stdio output.
1714 This variable is defined but not used by Configure.
1715 The value is a plain '' and is not useful.
1717 firstmakefile (Unix.U):
1718 This variable defines the first file searched by make. On unix,
1719 it is makefile (then Makefile). On case-insensitive systems,
1720 it might be something else. This is only used to deal with
1721 convoluted make depend tricks.
1724 This variable is defined but not used by Configure.
1725 The value is a plain '' and is not useful.
1727 fpossize (fpossize.U):
1728 This variable contains the size of a fpostype in bytes.
1730 fpostype (fpostype.U):
1731 This variable defines Fpos_t to be something like fpos_t, long,
1732 uint, or whatever type is used to declare file positions in libc.
1734 freetype (mallocsrc.U):
1735 This variable contains the return type of free(). It is usually
1736 void, but occasionally int.
1739 This variable contains the full pathname to 'ar', whether or
1740 not the user has specified 'portability'. This is only used
1744 This variable contains the full pathname to 'csh', whether or
1745 not the user has specified 'portability'. This is only used
1746 in the compiled C program, and we assume that all systems which
1747 can share this executable will have the same full pathname to
1750 full_sed (Loc_sed.U):
1751 This variable contains the full pathname to 'sed', whether or
1752 not the user has specified 'portability'. This is only used
1753 in the compiled C program, and we assume that all systems which
1754 can share this executable will have the same full pathname to
1758 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1759 indicate whether the compiler is version 1 or 2. This is used in
1760 setting some of the default cflags. It is set to '' if not gcc.
1763 This variable contains the format string used for printing a Gid_t.
1765 gidsign (gidsign.U):
1766 This variable contains the signedness of a gidtype.
1767 1 for unsigned, -1 for signed.
1769 gidsize (gidsize.U):
1770 This variable contains the size of a gidtype in bytes.
1772 gidtype (gidtype.U):
1773 This variable defines Gid_t to be something like gid_t, int,
1774 ushort, or whatever type is used to declare the return type
1775 of getgid(). Typically, it is the type of group ids in the kernel.
1778 This variable holds the general path (space-separated) used to
1779 find libraries. It may contain directories that do not exist on
1780 this platform, libpth is the cleaned-up version.
1783 This variable is used internally by Configure to determine the
1784 full pathname (if any) of the grep program. After Configure runs,
1785 the value is reset to a plain "grep" and is not useful.
1788 This variable contains a command that produces the text of the
1789 /etc/group file. This is normally "cat /etc/group", but can be
1790 "ypcat group" when NIS is used.
1791 On some systems, such as os390, there may be no equivalent
1792 command, in which case this variable is unset.
1794 groupstype (groupstype.U):
1795 This variable defines Groups_t to be something like gid_t, int,
1796 ushort, or whatever type is used for the second argument to
1797 getgroups() and setgroups(). Usually, this is the same as
1798 gidtype (gid_t), but sometimes it isn't.
1801 This variable is used internally by Configure to determine the
1802 full pathname (if any) of the gzip program. After Configure runs,
1803 the value is reset to a plain "gzip" and is not useful.
1805 h_fcntl (h_fcntl.U):
1806 This is variable gets set in various places to tell i_fcntl that
1807 <fcntl.h> should be included.
1809 h_sysfile (h_sysfile.U):
1810 This is variable gets set in various places to tell i_sys_file that
1811 <sys/file.h> should be included.
1814 Gives the type of hints used for previous answers. May be one of
1815 "default", "recommended" or "previous".
1818 This variable contains a command that produces the text of the
1819 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1820 "ypcat hosts" when NIS is used.
1821 On some systems, such as os390, there may be no equivalent
1822 command, in which case this variable is unset.
1825 This variable contains a flag which will tell the C compiler and loader
1826 to produce a program running with a huge memory model. If the
1827 huge model is not supported, contains the flag to produce large
1828 model programs. It is up to the Makefile to use this.
1831 This variable is the size of an I16 in bytes.
1834 This variable contains the C type used for Perl's I16.
1837 This variable is the size of an I32 in bytes.
1840 This variable contains the C type used for Perl's I32.
1843 This variable is the size of an I64 in bytes.
1846 This variable contains the C type used for Perl's I64.
1849 This variable is the size of an I8 in bytes.
1852 This variable contains the C type used for Perl's I8.
1854 i_arpainet (i_arpainet.U):
1855 This variable conditionally defines the I_ARPA_INET symbol,
1856 and indicates whether a C program should include <arpa/inet.h>.
1858 i_bsdioctl (i_sysioctl.U):
1859 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1860 indicates to the C program that <sys/bsdioctl.h> exists and should
1864 This variable conditionally defines the I_DB symbol, and indicates
1865 whether a C program may include Berkeley's DB include file <db.h>.
1868 This variable conditionally defines the I_DBM symbol, which
1869 indicates to the C program that <dbm.h> exists and should
1872 i_dirent (i_dirent.U):
1873 This variable conditionally defines I_DIRENT, which indicates
1874 to the C program that it should include <dirent.h>.
1877 This variable conditionally defines the I_DLD symbol, which
1878 indicates to the C program that <dld.h> (GNU dynamic loading)
1879 exists and should be included.
1881 i_dlfcn (i_dlfcn.U):
1882 This variable conditionally defines the I_DLFCN symbol, which
1883 indicates to the C program that <dlfcn.h> exists and should
1886 i_fcntl (i_fcntl.U):
1887 This variable controls the value of I_FCNTL (which tells
1888 the C program to include <fcntl.h>).
1890 i_float (i_float.U):
1891 This variable conditionally defines the I_FLOAT symbol, and indicates
1892 whether a C program may include <float.h> to get symbols like DBL_MAX
1893 or DBL_MIN, i.e. machine dependent floating point values.
1896 This variable conditionally defines the I_GDBM symbol, which
1897 indicates to the C program that <gdbm.h> exists and should
1901 This variable conditionally defines the I_GRP symbol, and indicates
1902 whether a C program should include <grp.h>.
1904 i_iconv (i_iconv.U):
1905 This variable conditionally defines the I_ICONV symbol, and indicates
1906 whether a C program should include <iconv.h>.
1908 i_inttypes (i_inttypes.U):
1909 This variable conditionally defines the I_INTTYPES symbol,
1910 and indicates whether a C program should include <inttypes.h>.
1912 i_limits (i_limits.U):
1913 This variable conditionally defines the I_LIMITS symbol, and indicates
1914 whether a C program may include <limits.h> to get symbols like WORD_BIT
1917 i_locale (i_locale.U):
1918 This variable conditionally defines the I_LOCALE symbol,
1919 and indicates whether a C program should include <locale.h>.
1921 i_machcthr (i_machcthr.U):
1922 This variable conditionally defines the I_MACH_CTHREADS symbol,
1923 and indicates whether a C program should include <mach/cthreads.h>.
1925 i_malloc (i_malloc.U):
1926 This variable conditionally defines the I_MALLOC symbol, and indicates
1927 whether a C program should include <malloc.h>.
1930 This variable conditionally defines the I_MATH symbol, and indicates
1931 whether a C program may include <math.h>.
1933 i_memory (i_memory.U):
1934 This variable conditionally defines the I_MEMORY symbol, and indicates
1935 whether a C program should include <memory.h>.
1937 i_mntent (i_mntent.U):
1938 This variable conditionally defines the I_MNTENT symbol, and indicates
1939 whether a C program should include <mntent.h>.
1942 This variable conditionally defines the I_NDBM symbol, which
1943 indicates to the C program that <ndbm.h> exists and should
1946 i_netdb (i_netdb.U):
1947 This variable conditionally defines the I_NETDB symbol, and indicates
1948 whether a C program should include <netdb.h>.
1950 i_neterrno (i_neterrno.U):
1951 This variable conditionally defines the I_NET_ERRNO symbol, which
1952 indicates to the C program that <net/errno.h> exists and should
1955 i_netinettcp (i_netinettcp.U):
1956 This variable conditionally defines the I_NETINET_TCP symbol,
1957 and indicates whether a C program should include <netinet/tcp.h>.
1960 This variable conditionally defines I_NETINET_IN, which indicates
1961 to the C program that it should include <netinet/in.h>. Otherwise,
1962 you may try <sys/in.h>.
1965 This variable conditionally defines the I_POLL symbol, and indicates
1966 whether a C program should include <poll.h>.
1968 i_pthread (i_pthread.U):
1969 This variable conditionally defines the I_PTHREAD symbol,
1970 and indicates whether a C program should include <pthread.h>.
1973 This variable conditionally defines I_PWD, which indicates
1974 to the C program that it should include <pwd.h>.
1976 i_rpcsvcdbm (i_dbm.U):
1977 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1978 indicates to the C program that <rpcsvc/dbm.h> exists and should
1979 be included. Some System V systems might need this instead of <dbm.h>.
1982 This variable conditionally defines the I_SFIO symbol,
1983 and indicates whether a C program should include <sfio.h>.
1985 i_sgtty (i_termio.U):
1986 This variable conditionally defines the I_SGTTY symbol, which
1987 indicates to the C program that it should include <sgtty.h> rather
1990 i_shadow (i_shadow.U):
1991 This variable conditionally defines the I_SHADOW symbol, and indicates
1992 whether a C program should include <shadow.h>.
1994 i_socks (i_socks.U):
1995 This variable conditionally defines the I_SOCKS symbol, and indicates
1996 whether a C program should include <socks.h>.
1998 i_stdarg (i_varhdr.U):
1999 This variable conditionally defines the I_STDARG symbol, which
2000 indicates to the C program that <stdarg.h> exists and should
2003 i_stddef (i_stddef.U):
2004 This variable conditionally defines the I_STDDEF symbol, which
2005 indicates to the C program that <stddef.h> exists and should
2008 i_stdlib (i_stdlib.U):
2009 This variable conditionally defines the I_STDLIB symbol, which
2010 indicates to the C program that <stdlib.h> exists and should
2013 i_string (i_string.U):
2014 This variable conditionally defines the I_STRING symbol, which
2015 indicates that <string.h> should be included rather than <strings.h>.
2017 i_sysaccess (i_sysaccess.U):
2018 This variable conditionally defines the I_SYS_ACCESS symbol,
2019 and indicates whether a C program should include <sys/access.h>.
2021 i_sysdir (i_sysdir.U):
2022 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2023 whether a C program should include <sys/dir.h>.
2025 i_sysfile (i_sysfile.U):
2026 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2027 whether a C program should include <sys/file.h> to get R_OK and friends.
2029 i_sysfilio (i_sysioctl.U):
2030 This variable conditionally defines the I_SYS_FILIO symbol, which
2031 indicates to the C program that <sys/filio.h> exists and should
2032 be included in preference to <sys/ioctl.h>.
2035 This variable conditionally defines I_SYS_IN, which indicates
2036 to the C program that it should include <sys/in.h> instead of
2039 i_sysioctl (i_sysioctl.U):
2040 This variable conditionally defines the I_SYS_IOCTL symbol, which
2041 indicates to the C program that <sys/ioctl.h> exists and should
2044 i_syslog (i_syslog.U):
2045 This variable conditionally defines the I_SYSLOG symbol,
2046 and indicates whether a C program should include <syslog.h>.
2048 i_sysmman (i_sysmman.U):
2049 This variable conditionally defines the I_SYS_MMAN symbol, and
2050 indicates whether a C program should include <sys/mman.h>.
2052 i_sysmode (i_sysmode.U):
2053 This variable conditionally defines the I_SYSMODE symbol,
2054 and indicates whether a C program should include <sys/mode.h>.
2056 i_sysmount (i_sysmount.U):
2057 This variable conditionally defines the I_SYSMOUNT symbol,
2058 and indicates whether a C program should include <sys/mount.h>.
2060 i_sysndir (i_sysndir.U):
2061 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2062 whether a C program should include <sys/ndir.h>.
2064 i_sysparam (i_sysparam.U):
2065 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2066 whether a C program should include <sys/param.h>.
2068 i_sysresrc (i_sysresrc.U):
2069 This variable conditionally defines the I_SYS_RESOURCE symbol,
2070 and indicates whether a C program should include <sys/resource.h>.
2072 i_syssecrt (i_syssecrt.U):
2073 This variable conditionally defines the I_SYS_SECURITY symbol,
2074 and indicates whether a C program should include <sys/security.h>.
2076 i_sysselct (i_sysselct.U):
2077 This variable conditionally defines I_SYS_SELECT, which indicates
2078 to the C program that it should include <sys/select.h> in order to
2079 get the definition of struct timeval.
2081 i_syssockio (i_sysioctl.U):
2082 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2083 C program that socket ioctl codes may be found in <sys/sockio.h>
2084 instead of <sys/ioctl.h>.
2086 i_sysstat (i_sysstat.U):
2087 This variable conditionally defines the I_SYS_STAT symbol,
2088 and indicates whether a C program should include <sys/stat.h>.
2090 i_sysstatfs (i_sysstatfs.U):
2091 This variable conditionally defines the I_SYSSTATFS symbol,
2092 and indicates whether a C program should include <sys/statfs.h>.
2094 i_sysstatvfs (i_sysstatvfs.U):
2095 This variable conditionally defines the I_SYSSTATVFS symbol,
2096 and indicates whether a C program should include <sys/statvfs.h>.
2098 i_systime (i_time.U):
2099 This variable conditionally defines I_SYS_TIME, which indicates
2100 to the C program that it should include <sys/time.h>.
2102 i_systimek (i_time.U):
2103 This variable conditionally defines I_SYS_TIME_KERNEL, which
2104 indicates to the C program that it should include <sys/time.h>
2105 with KERNEL defined.
2107 i_systimes (i_systimes.U):
2108 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2109 whether a C program should include <sys/times.h>.
2111 i_systypes (i_systypes.U):
2112 This variable conditionally defines the I_SYS_TYPES symbol,
2113 and indicates whether a C program should include <sys/types.h>.
2115 i_sysuio (i_sysuio.U):
2116 This variable conditionally defines the I_SYSUIO symbol, and indicates
2117 whether a C program should include <sys/uio.h>.
2119 i_sysun (i_sysun.U):
2120 This variable conditionally defines I_SYS_UN, which indicates
2121 to the C program that it should include <sys/un.h> to get UNIX
2122 domain socket definitions.
2124 i_sysutsname (i_sysutsname.U):
2125 This variable conditionally defines the I_SYSUTSNAME symbol,
2126 and indicates whether a C program should include <sys/utsname.h>.
2128 i_sysvfs (i_sysvfs.U):
2129 This variable conditionally defines the I_SYSVFS symbol,
2130 and indicates whether a C program should include <sys/vfs.h>.
2132 i_syswait (i_syswait.U):
2133 This variable conditionally defines I_SYS_WAIT, which indicates
2134 to the C program that it should include <sys/wait.h>.
2136 i_termio (i_termio.U):
2137 This variable conditionally defines the I_TERMIO symbol, which
2138 indicates to the C program that it should include <termio.h> rather
2141 i_termios (i_termio.U):
2142 This variable conditionally defines the I_TERMIOS symbol, which
2143 indicates to the C program that the POSIX <termios.h> file is
2147 This variable conditionally defines I_TIME, which indicates
2148 to the C program that it should include <time.h>.
2150 i_unistd (i_unistd.U):
2151 This variable conditionally defines the I_UNISTD symbol, and indicates
2152 whether a C program should include <unistd.h>.
2154 i_ustat (i_ustat.U):
2155 This variable conditionally defines the I_USTAT symbol, and indicates
2156 whether a C program should include <ustat.h>.
2158 i_utime (i_utime.U):
2159 This variable conditionally defines the I_UTIME symbol, and indicates
2160 whether a C program should include <utime.h>.
2162 i_values (i_values.U):
2163 This variable conditionally defines the I_VALUES symbol, and indicates
2164 whether a C program may include <values.h> to get symbols like MAXLONG
2167 i_varargs (i_varhdr.U):
2168 This variable conditionally defines I_VARARGS, which indicates
2169 to the C program that it should include <varargs.h>.
2171 i_varhdr (i_varhdr.U):
2172 Contains the name of the header to be included to get va_dcl definition.
2173 Typically one of varargs.h or stdarg.h.
2175 i_vfork (i_vfork.U):
2176 This variable conditionally defines the I_VFORK symbol, and indicates
2177 whether a C program should include vfork.h.
2179 ignore_versioned_solibs (libs.U):
2180 This variable should be non-empty if non-versioned shared
2181 libraries (libfoo.so.x.y) are to be ignored (because they
2182 cannot be linked against).
2184 inc_version_list (inc_version_list.U):
2185 This variable specifies the list of subdirectories in over
2186 which perl.c:incpush() and lib/lib.pm will automatically
2187 search when adding directories to @INC. The elements in
2188 the list are separated by spaces. This is only useful
2189 if you have a perl library directory tree structured like the
2190 default one. See INSTALL for how this works. The versioned
2191 site_perl directory was introduced in 5.005, so that is the
2192 lowest possible value.
2194 inc_version_list_init (inc_version_list.U):
2195 This variable holds the same list as inc_version_list, but
2196 each item is enclosed in double quotes and separated by commas,
2197 suitable for use in the PERL_INC_VERSION_LIST initialization.
2200 This variable must preceed the normal include path to get hte
2201 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2202 Value can be "" or "/bsd43" on mips.
2205 This variable is defined but not used by Configure.
2206 The value is a plain '' and is not useful.
2208 installarchlib (archlib.U):
2209 This variable is really the same as archlibexp but may differ on
2210 those systems using AFS. For extra portability, only this variable
2211 should be used in makefiles.
2214 This variable is the same as binexp unless AFS is running in which case
2215 the user is explicitely prompted for it. This variable should always
2216 be used in your makefiles for maximum portability.
2218 installman1dir (man1dir.U):
2219 This variable is really the same as man1direxp, unless you are using
2220 AFS in which case it points to the read/write location whereas
2221 man1direxp only points to the read-only access location. For extra
2222 portability, you should only use this variable within your makefiles.
2224 installman3dir (man3dir.U):
2225 This variable is really the same as man3direxp, unless you are using
2226 AFS in which case it points to the read/write location whereas
2227 man3direxp only points to the read-only access location. For extra
2228 portability, you should only use this variable within your makefiles.
2230 installprefix (installprefix.U):
2231 This variable holds the name of the directory below which
2232 "make install" will install the package. For most users, this
2233 is the same as prefix. However, it is useful for
2234 installing the software into a different (usually temporary)
2235 location after which it can be bundled up and moved somehow
2236 to the final location specified by prefix.
2238 installprefixexp (installprefix.U):
2239 This variable holds the full absolute path of installprefix
2240 with all ~-expansion done.
2242 installprivlib (privlib.U):
2243 This variable is really the same as privlibexp but may differ on
2244 those systems using AFS. For extra portability, only this variable
2245 should be used in makefiles.
2247 installscript (scriptdir.U):
2248 This variable is usually the same as scriptdirexp, unless you are on
2249 a system running AFS, in which case they may differ slightly. You
2250 should always use this variable within your makefiles for portability.
2252 installsitearch (sitearch.U):
2253 This variable is really the same as sitearchexp but may differ on
2254 those systems using AFS. For extra portability, only this variable
2255 should be used in makefiles.
2257 installsitebin (sitebin.U):
2258 This variable is usually the same as sitebinexp, unless you are on
2259 a system running AFS, in which case they may differ slightly. You
2260 should always use this variable within your makefiles for portability.
2262 installsitelib (sitelib.U):
2263 This variable is really the same as sitelibexp but may differ on
2264 those systems using AFS. For extra portability, only this variable
2265 should be used in makefiles.
2267 installstyle (installstyle.U):
2268 This variable describes the "style" of the perl installation.
2269 This is intended to be useful for tools that need to
2270 manipulate entire perl distributions. Perl itself doesn't use
2271 this to find its libraries -- the library directories are
2272 stored directly in Config.pm. Currently, there are only two
2273 styles: "lib" and "lib/perl5". The default library locations
2274 (e.g. privlib, sitelib) are either $prefix/lib or
2275 $prefix/lib/perl5. The former is useful if $prefix is a
2276 directory dedicated to perl (e.g. /opt/perl), while the latter
2277 is useful if $prefix is shared by many packages, e.g. if
2279 This may later be extended to include other information, so
2280 be careful with pattern-matching on the results.
2281 For compatibility with perl5.005 and earlier, the default
2282 setting is based on whether or not $prefix contains the string
2285 installusrbinperl (instubperl.U):
2286 This variable tells whether Perl should be installed also as
2287 /usr/bin/perl in addition to
2290 installvendorbin (vendorbin.U):
2291 This variable is really the same as vendorbinexp but may differ on
2292 those systems using AFS. For extra portability, only this variable
2293 should be used in makefiles.
2295 installvendorlib (vendorlib.U):
2296 This variable is really the same as vendorlibexp but may differ on
2297 those systems using AFS. For extra portability, only this variable
2298 should be used in makefiles.
2300 intsize (intsize.U):
2301 This variable contains the value of the INTSIZE symbol, which
2302 indicates to the C program how many bytes there are in an int.
2304 ivdformat (perlxvf.U):
2305 This variable contains the format string used for printing
2306 a Perl IV as a signed decimal integer.
2309 This variable is the size of an IV in bytes.
2312 This variable contains the C type used for Perl's IV.
2314 known_extensions (Extensions.U):
2315 This variable holds a list of all XS extensions included in
2319 This variable is defined but not used by Configure.
2320 The value is a plain '' and is not useful.
2323 This variable contains a flag which will tell the C compiler and loader
2324 to produce a program running with a large memory model. It is up to
2325 the Makefile to use this.
2328 This variable indicates the program to be used to link
2329 libraries for dynamic loading. On some systems, it is 'ld'.
2330 On ELF systems, it should be $cc. Mostly, we'll try to respect
2331 the hint file setting.
2333 lddlflags (dlsrc.U):
2334 This variable contains any special flags that might need to be
2335 passed to $ld to create a shared library suitable for dynamic
2336 loading. It is up to the makefile to use it. For hpux, it
2337 should be '-b'. For sunos 4.1, it is empty.
2339 ldflags (ccflags.U):
2340 This variable contains any additional C loader flags desired by
2341 the user. It is up to the Makefile to use this.
2343 ldlibpthname (libperl.U):
2344 This variable holds the name of the shared library
2345 search path, often LD_LIBRARY_PATH. To get an empty
2346 string, the hints file must set this to 'none'.
2349 This variable is used internally by Configure to determine the
2350 full pathname (if any) of the less program. After Configure runs,
2351 the value is reset to a plain "less" and is not useful.
2354 This is an old synonym for _a.
2357 This variable contains the location of the C library.
2359 libperl (libperl.U):
2360 The perl executable is obtained by linking perlmain.c with
2361 libperl, any static extensions (usually just DynaLoader),
2362 and any other libraries needed on this system. libperl
2363 is usually libperl.a, but can also be libperl.so.xxx if
2364 the user wishes to build a perl executable with a shared
2368 This variable holds the general path (space-separated) used to find
2369 libraries. It is intended to be used by other units.
2372 This variable holds the additional libraries we want to use.
2373 It is up to the Makefile to deal with it.
2376 This variable holds the directory names aka dirnames of the libraries
2377 we found and accepted, duplicates are removed.
2380 This variable holds the filenames aka basenames of the libraries
2381 we found and accepted.
2384 This variable holds the full pathnames of the libraries
2385 we found and accepted.
2387 libswanted (Myinit.U):
2388 This variable holds a list of all the libraries we want to
2389 search. The order is chosen to pick up the c library
2390 ahead of ucb or bsd libraries for SVR4.
2393 This variable is defined but not used by Configure.
2394 The value is a plain '' and is not useful.
2397 This variable is defined but not used by Configure.
2398 The value is a plain '' and is not useful.
2400 lkflags (ccflags.U):
2401 This variable contains any additional C partial linker flags desired by
2402 the user. It is up to the Makefile to use this.
2405 This variable is used internally by Configure to determine the
2406 full pathname (if any) of the ln program. After Configure runs,
2407 the value is reset to a plain "ln" and is not useful.
2410 This variable holds the name of the command to make
2411 symbolic links (if they are supported). It can be used
2412 in the Makefile. It is either 'ln -s' or 'ln'
2414 locincpth (ccflags.U):
2415 This variable contains a list of additional directories to be
2416 searched by the compiler. The appropriate '-I' directives will
2417 be added to ccflags. This is intended to simplify setting
2418 local directories from the Configure command line.
2419 It's not much, but it parallels the loclibpth stuff in libpth.U.
2421 loclibpth (libpth.U):
2422 This variable holds the paths (space-separated) used to find local
2423 libraries. It is prepended to libpth, and is intended to be easily
2424 set from the command line.
2426 longdblsize (d_longdbl.U):
2427 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2428 indicates to the C program how many bytes there are in a long double,
2429 if this system supports long doubles.
2431 longlongsize (d_longlong.U):
2432 This variable contains the value of the LONGLONGSIZE symbol, which
2433 indicates to the C program how many bytes there are in a long long,
2434 if this system supports long long.
2436 longsize (intsize.U):
2437 This variable contains the value of the LONGSIZE symbol, which
2438 indicates to the C program how many bytes there are in a long.
2441 This variable is defined but not used by Configure.
2442 The value is a plain '' and is not useful.
2445 This variable is defined but not used by Configure.
2446 The value is a plain '' and is not useful.
2449 This variable is used internally by Configure to determine the
2450 full pathname (if any) of the ls program. After Configure runs,
2451 the value is reset to a plain "ls" and is not useful.
2453 lseeksize (lseektype.U):
2454 This variable defines lseektype to be something like off_t, long,
2455 or whatever type is used to declare lseek offset's type in the
2456 kernel (which also appears to be lseek's return type).
2458 lseektype (lseektype.U):
2459 This variable defines lseektype to be something like off_t, long,
2460 or whatever type is used to declare lseek offset's type in the
2461 kernel (which also appears to be lseek's return type).
2464 This variable is defined but not used by Configure.
2465 The value is a plain '' and is not useful.
2468 This variable is defined but not used by Configure.
2469 The value is a plain '' and is not useful.
2472 This variable is used internally by Configure to determine the
2473 full pathname (if any) of the make program. After Configure runs,
2474 the value is reset to a plain "make" and is not useful.
2476 make_set_make (make.U):
2477 Some versions of 'make' set the variable MAKE. Others do not.
2478 This variable contains the string to be included in Makefile.SH
2479 so that MAKE is set if needed, and not if not needed.
2480 Possible values are:
2481 make_set_make='#' # If your make program handles this for you,
2482 make_set_make="MAKE=$make" # if it doesn't.
2483 I used a comment character so that we can distinguish a
2484 'set' value (from a previous config.sh or Configure '-D' option)
2485 from an uncomputed value.
2487 mallocobj (mallocsrc.U):
2488 This variable contains the name of the malloc.o that this package
2489 generates, if that malloc.o is preferred over the system malloc.
2490 Otherwise the value is null. This variable is intended for generating
2491 Makefiles. See mallocsrc.
2493 mallocsrc (mallocsrc.U):
2494 This variable contains the name of the malloc.c that comes with
2495 the package, if that malloc.c is preferred over the system malloc.
2496 Otherwise the value is null. This variable is intended for generating
2499 malloctype (mallocsrc.U):
2500 This variable contains the kind of ptr returned by malloc and realloc.
2502 man1dir (man1dir.U):
2503 This variable contains the name of the directory in which manual
2504 source pages are to be put. It is the responsibility of the
2505 Makefile.SH to get the value of this into the proper command.
2506 You must be prepared to do the ~name expansion yourself.
2508 man1direxp (man1dir.U):
2509 This variable is the same as the man1dir variable, but is filename
2510 expanded at configuration time, for convenient use in makefiles.
2512 man1ext (man1dir.U):
2513 This variable contains the extension that the manual page should
2514 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2517 man3dir (man3dir.U):
2518 This variable contains the name of the directory in which manual
2519 source pages are to be put. It is the responsibility of the
2520 Makefile.SH to get the value of this into the proper command.
2521 You must be prepared to do the ~name expansion yourself.
2523 man3direxp (man3dir.U):
2524 This variable is the same as the man3dir variable, but is filename
2525 expanded at configuration time, for convenient use in makefiles.
2527 man3ext (man3dir.U):
2528 This variable contains the extension that the manual page should
2529 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2533 This variable is used internally by Configure to determine the
2534 full pathname (if any) of the Mcc program. After Configure runs,
2535 the value is reset to a plain "Mcc" and is not useful.
2538 This variable contains a flag which will tell the C compiler and loader
2539 to produce a program running with a medium memory model. If the
2540 medium model is not supported, contains the flag to produce large
2541 model programs. It is up to the Makefile to use this.
2543 mips_type (usrinc.U):
2544 This variable holds the environment type for the mips system.
2545 Possible values are "BSD 4.3" and "System V".
2548 This variable is used internally by Configure to determine the
2549 full pathname (if any) of the mkdir program. After Configure runs,
2550 the value is reset to a plain "mkdir" and is not useful.
2552 mmaptype (d_mmap.U):
2553 This symbol contains the type of pointer returned by mmap()
2554 (and simultaneously the type of the first argument).
2555 It can be 'void *' or 'caddr_t'.
2558 This variable contains the list of memory models supported by this
2559 system. Possible component values are none, split, unsplit, small,
2560 medium, large, and huge. The component values are space separated.
2562 modetype (modetype.U):
2563 This variable defines modetype to be something like mode_t,
2564 int, unsigned short, or whatever type is used to declare file
2565 modes for system calls.
2568 This variable is used internally by Configure to determine the
2569 full pathname (if any) of the more program. After Configure runs,
2570 the value is reset to a plain "more" and is not useful.
2572 multiarch (multiarch.U):
2573 This variable conditionally defines the MULTIARCH symbol
2574 which signifies the presence of multiplatform files.
2575 This is normally set by hints files.
2578 This variable is defined but not used by Configure.
2579 The value is a plain '' and is not useful.
2581 myarchname (archname.U):
2582 This variable holds the architecture name computed by Configure in
2583 a previous run. It is not intended to be perused by any user and
2584 should never be set in a hint file.
2586 mydomain (myhostname.U):
2587 This variable contains the eventual value of the MYDOMAIN symbol,
2588 which is the domain of the host the program is going to run on.
2589 The domain must be appended to myhostname to form a complete host name.
2590 The dot comes with mydomain, and need not be supplied by the program.
2592 myhostname (myhostname.U):
2593 This variable contains the eventual value of the MYHOSTNAME symbol,
2594 which is the name of the host the program is going to run on.
2595 The domain is not kept with hostname, but must be gotten from mydomain.
2596 The dot comes with mydomain, and need not be supplied by the program.
2598 myuname (Oldconfig.U):
2599 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2600 pseudo variables assignments in the output are stripped, thank you. The
2601 whole thing is then lower-cased.
2604 This variable contains the '-n' flag if that is what causes the echo
2605 command to suppress newline. Otherwise it is null. Correct usage is
2606 $echo $n "prompt for a question: $c".
2608 netdb_hlen_type (netdbtype.U):
2609 This variable holds the type used for the 2nd argument to
2610 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2611 This is only useful if you have gethostbyaddr(), naturally.
2613 netdb_host_type (netdbtype.U):
2614 This variable holds the type used for the 1st argument to
2615 gethostbyaddr(). Usually, this is char * or void *, possibly
2616 with or without a const prefix.
2617 This is only useful if you have gethostbyaddr(), naturally.
2619 netdb_name_type (netdbtype.U):
2620 This variable holds the type used for the argument to
2621 gethostbyname(). Usually, this is char * or const char *.
2622 This is only useful if you have gethostbyname(), naturally.
2624 netdb_net_type (netdbtype.U):
2625 This variable holds the type used for the 1st argument to
2626 getnetbyaddr(). Usually, this is int or long.
2627 This is only useful if you have getnetbyaddr(), naturally.
2630 This variable is used internally by Configure to determine the
2631 full pathname (if any) of the nm program. After Configure runs,
2632 the value is reset to a plain "nm" and is not useful.
2635 This variable holds the options that may be necessary for nm.
2637 nm_so_opt (usenm.U):
2638 This variable holds the options that may be necessary for nm
2639 to work on a shared library but that can not be used on an
2640 archive library. Currently, this is only used by Linux, where
2641 nm --dynamic is *required* to get symbols from an ELF library which
2642 has been stripped, but nm --dynamic is *fatal* on an archive library.
2643 Maybe Linux should just always set usenm=false.
2645 nonxs_ext (Extensions.U):
2646 This variable holds a list of all non-xs extensions included
2647 in the package. All of them will be built.
2650 This variable is used internally by Configure to determine the
2651 full pathname (if any) of the nroff program. After Configure runs,
2652 the value is reset to a plain "nroff" and is not useful.
2655 This variable is the size of an NV in bytes.
2658 This variable contains the C type used for Perl's NV.
2660 o_nonblock (nblock_io.U):
2661 This variable bears the symbol value to be used during open() or fcntl()
2662 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2663 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2664 but that is only supported by some devices.
2667 This is an old synonym for _o.
2669 old_pthread_create_joinable (d_pthrattrj.U):
2670 This variable defines the constant to use for creating joinable
2671 (aka undetached) pthreads. Unused if pthread.h defines
2672 PTHREAD_CREATE_JOINABLE. If used, possible values are
2673 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2675 optimize (ccflags.U):
2676 This variable contains any optimizer/debugger flag that should be used.
2677 It is up to the Makefile to use it.
2679 orderlib (orderlib.U):
2680 This variable is "true" if the components of libraries must be ordered
2681 (with `lorder $* | tsort`) before placing them in an archive. Set to
2682 "false" if ranlib or ar can generate random libraries.
2684 osname (Oldconfig.U):
2685 This variable contains the operating system name (e.g. sunos,
2686 solaris, hpux, etc.). It can be useful later on for setting
2687 defaults. Any spaces are replaced with underscores. It is set
2688 to a null string if we can't figure it out.
2690 osvers (Oldconfig.U):
2691 This variable contains the operating system version (e.g.
2692 4.1.3, 5.2, etc.). It is primarily used for helping select
2693 an appropriate hints file, but might be useful elsewhere for
2694 setting defaults. It is set to '' if we can't figure it out.
2695 We try to be flexible about how much of the version number
2696 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2697 same for this package, hints files might just be os_4.0 or
2698 os_4.1, etc., not keeping separate files for each little release.
2700 package (package.U):
2701 This variable contains the name of the package being constructed.
2702 It is primarily intended for the use of later Configure units.
2705 This variable contains the name of the preferred pager on the system.
2706 Usual values are (the full pathnames of) more, less, pg, or cat.
2709 This variable contains a command that produces the text of the
2710 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2711 "ypcat passwd" when NIS is used.
2712 On some systems, such as os390, there may be no equivalent
2713 command, in which case this variable is unset.
2715 patchlevel (patchlevel.U):
2716 The patchlevel level of this package.
2717 The value of patchlevel comes from the patchlevel.h file.
2718 In a version number such as 5.6.1, this is the "6".
2719 In patchlevel.h, this is referred to as the "PERL_VERSION".
2722 This is an old synonym for p_ in Head.U, the character
2723 used to separate elements in the command shell search PATH.
2726 This variable is used internally by Configure to determine the
2727 full pathname (if any) of the perl program. After Configure runs,
2728 the value is reset to a plain "perl" and is not useful.
2730 PERL_REVISION (Oldsyms.U):
2731 In a Perl version number such as 5.6.2, this is the 5.
2732 This value is manually set in patchlevel.h
2734 PERL_SUBVERSION (Oldsyms.U):
2735 In a Perl version number such as 5.6.2, this is the 2.
2736 Values greater than 50 represent potentially unstable
2737 development subversions.
2738 This value is manually set in patchlevel.h
2740 PERL_VERSION (Oldsyms.U):
2741 In a Perl version number such as 5.6.2, this is the 6.
2742 This value is manually set in patchlevel.h
2744 perladmin (perladmin.U):
2745 Electronic mail address of the perl5 administrator.
2747 perlpath (perlpath.U):
2748 This variable contains the eventual value of the PERLPATH symbol,
2749 which contains the name of the perl interpreter to be used in
2750 shell scripts and in the "eval 'exec'" idiom.
2753 This variable is used internally by Configure to determine the
2754 full pathname (if any) of the pg program. After Configure runs,
2755 the value is reset to a plain "pg" and is not useful.
2757 phostname (myhostname.U):
2758 This variable contains the eventual value of the PHOSTNAME symbol,
2759 which is a command that can be fed to popen() to get the host name.
2760 The program should probably not presume that the domain is or isn't
2763 pidtype (pidtype.U):
2764 This variable defines PIDTYPE to be something like pid_t, int,
2765 ushort, or whatever type is used to declare process ids in the kernel.
2768 Holds the private path used by Configure to find out the libraries.
2769 Its value is prepend to libpth. This variable takes care of special
2770 machines, like the mips. Usually, it should be empty.
2772 pm_apiversion (xs_apiversion.U):
2773 This variable contains the version of the oldest perl
2774 compatible with the present perl. (That is, pure perl modules
2775 written for $pm_apiversion will still work for the current
2776 version). perl.c:incpush() and lib/lib.pm will automatically
2777 search in $sitelib for older directories across major versions
2778 back to pm_apiversion. This is only useful if you have a perl
2779 library directory tree structured like the default one. The
2780 versioned site_perl library was introduced in 5.005, so that's
2781 the default setting for this variable. It's hard to imagine
2782 it changing before Perl6. It is included here for symmetry
2783 with xs_apiveprsion -- the searching algorithms will
2784 (presumably) be similar.
2785 See the INSTALL file for how this works.
2788 This variable is defined but not used by Configure.
2789 The value is a plain '' and is not useful.
2792 This variable is defined but not used by Configure.
2793 The value is a plain '' and is not useful.
2796 This variable holds the name of the directory below which the
2797 user will install the package. Usually, this is /usr/local, and
2798 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2799 man pages in /usr/local/man, etc. It is only used to set defaults
2800 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2802 prefixexp (prefix.U):
2803 This variable holds the full absolute path of the directory below
2804 which the user will install the package. Derived from prefix.
2806 privlib (privlib.U):
2807 This variable contains the eventual value of the PRIVLIB symbol,
2808 which is the name of the private library for this package. It may
2809 have a ~ on the front. It is up to the makefile to eventually create
2810 this directory while performing installation (with ~ substitution).
2812 privlibexp (privlib.U):
2813 This variable is the ~name expanded version of privlib, so that you
2814 may use it directly in Makefiles or shell scripts.
2816 prototype (prototype.U):
2817 This variable holds the eventual value of CAN_PROTOTYPE, which
2818 indicates the C compiler can handle funciton prototypes.
2820 ptrsize (ptrsize.U):
2821 This variable contains the value of the PTRSIZE symbol, which
2822 indicates to the C program how many bytes there are in a pointer.
2824 quadkind (quadtype.U):
2825 This variable, if defined, encodes the type of a quad:
2826 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2828 quadtype (quadtype.U):
2829 This variable defines Quad_t to be something like long, int,
2830 long long, int64_t, or whatever type is used for 64-bit integers.
2832 randbits (randfunc.U):
2833 Indicates how many bits are produced by the function used to
2834 generate normalized random numbers.
2836 randfunc (randfunc.U):
2837 Indicates the name of the random number function to use.
2838 Values include drand48, random, and rand. In C programs,
2839 the 'Drand01' macro is defined to generate uniformly distributed
2840 random numbers over the range [0., 1.[ (see drand01 and nrand).
2842 randseedtype (randfunc.U):
2843 Indicates the type of the argument of the seedfunc.
2845 ranlib (orderlib.U):
2846 This variable is set to the pathname of the ranlib program, if it is
2847 needed to generate random libraries. Set to ":" if ar can generate
2848 random libraries or if random libraries are not supported
2850 rd_nodata (nblock_io.U):
2851 This variable holds the return code from read() when no data is
2852 present. It should be -1, but some systems return 0 when O_NDELAY is
2853 used, which is a shame because you cannot make the difference between
2854 no data and an EOF.. Sigh!
2857 This variable is used internally by Configure to determine the
2858 full pathname (if any) of the rm program. After Configure runs,
2859 the value is reset to a plain "rm" and is not useful.
2862 This variable is defined but not used by Configure.
2863 The value is a plain '' and is not useful.
2866 This variable contains 'true' or 'false' depending whether the
2867 nm extraction should be performed or not, according to the value
2868 of usenm and the flags on the Configure command line.
2870 sched_yield (d_pthread_y.U):
2871 This variable defines the way to yield the execution
2872 of the current thread.
2874 scriptdir (scriptdir.U):
2875 This variable holds the name of the directory in which the user wants
2876 to put publicly scripts for the package in question. It is either
2877 the same directory as for binaries, or a special one that can be
2878 mounted across different architectures, like /usr/share. Programs
2879 must be prepared to deal with ~name expansion.
2881 scriptdirexp (scriptdir.U):
2882 This variable is the same as scriptdir, but is filename expanded
2883 at configuration time, for programs not wanting to bother with it.
2886 This variable is used internally by Configure to determine the
2887 full pathname (if any) of the sed program. After Configure runs,
2888 the value is reset to a plain "sed" and is not useful.
2890 seedfunc (randfunc.U):
2891 Indicates the random number generating seed function.
2892 Values include srand48, srandom, and srand.
2894 selectminbits (selectminbits.U):
2895 This variable holds the minimum number of bits operated by select.
2896 That is, if you do select(n, ...), how many bits at least will be
2897 cleared in the masks if some activity is detected. Usually this
2898 is either n or 32*ceil(n/32), especially many little-endians do
2899 the latter. This is only useful if you have select(), naturally.
2901 selecttype (selecttype.U):
2902 This variable holds the type used for the 2nd, 3rd, and 4th
2903 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2904 is defined, and 'int *' otherwise. This is only useful if you
2905 have select(), naturally.
2908 This variable is defined but not used by Configure.
2909 The value is a plain '' and is not useful.
2912 This variable contains the full pathname of the shell used
2913 on this system to execute Bourne shell scripts. Usually, this will be
2914 /bin/sh, though it's possible that some systems will have /bin/ksh,
2915 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2917 This unit comes before Options.U, so you can't set sh with a '-D'
2918 option, though you can override this (and startsh)
2919 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2922 This variable is defined but not used by Configure.
2923 The value is a plain '' and is not useful.
2925 sharpbang (spitshell.U):
2926 This variable contains the string #! if this system supports that
2929 shmattype (d_shmat.U):
2930 This symbol contains the type of pointer returned by shmat().
2931 It can be 'void *' or 'char *'.
2933 shortsize (intsize.U):
2934 This variable contains the value of the SHORTSIZE symbol which
2935 indicates to the C program how many bytes there are in a short.
2937 shrpenv (libperl.U):
2938 If the user builds a shared libperl.so, then we need to tell the
2939 'perl' executable where it will be able to find the installed libperl.so.
2940 One way to do this on some systems is to set the environment variable
2941 LD_RUN_PATH to the directory that will be the final location of the
2942 shared libperl.so. The makefile can use this with something like
2943 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2945 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2948 See the main perl Makefile.SH for actual working usage.
2949 Alternatively, we might be able to use a command line option such
2950 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2951 $archlibexp/CORE (Linux).
2953 shsharp (spitshell.U):
2954 This variable tells further Configure units whether your sh can
2957 sig_count (sig_name.U):
2958 This variable holds a number larger than the largest valid
2959 signal number. This is usually the same as the NSIG macro.
2961 sig_name (sig_name.U):
2962 This variable holds the signal names, space separated. The leading
2963 SIG in signal name is removed. A ZERO is prepended to the
2964 list. This is currently not used.
2966 sig_name_init (sig_name.U):
2967 This variable holds the signal names, enclosed in double quotes and
2968 separated by commas, suitable for use in the SIG_NAME definition
2969 below. A "ZERO" is prepended to the list, and the list is
2970 terminated with a plain 0. The leading SIG in signal names
2971 is removed. See sig_num.
2973 sig_num (sig_name.U):
2974 This variable holds the signal numbers, space separated. A ZERO is
2975 prepended to the list (corresponding to the fake SIGZERO), and
2976 the list is terminated with a 0. Those numbers correspond to
2977 the value of the signal listed in the same place within the
2980 sig_num_init (sig_name.U):
2981 This variable holds the signal numbers, enclosed in double quotes and
2982 separated by commas, suitable for use in the SIG_NUM definition
2983 below. A "ZERO" is prepended to the list, and the list is
2984 terminated with a plain 0.
2986 signal_t (d_voidsig.U):
2987 This variable holds the type of the signal handler (void or int).
2989 sitearch (sitearch.U):
2990 This variable contains the eventual value of the SITEARCH symbol,
2991 which is the name of the private library for this package. It may
2992 have a ~ on the front. It is up to the makefile to eventually create
2993 this directory while performing installation (with ~ substitution).
2994 The standard distribution will put nothing in this directory.
2995 After perl has been installed, users may install their own local
2996 architecture-dependent modules in this directory with
2997 MakeMaker Makefile.PL
2998 or equivalent. See INSTALL for details.
3000 sitearchexp (sitearch.U):
3001 This variable is the ~name expanded version of sitearch, so that you
3002 may use it directly in Makefiles or shell scripts.
3004 sitebin (sitebin.U):
3005 This variable holds the name of the directory in which the user wants
3006 to put add-on publicly executable files for the package in question. It
3007 is most often a local directory such as /usr/local/bin. Programs using
3008 this variable must be prepared to deal with ~name substitution.
3009 The standard distribution will put nothing in this directory.
3010 After perl has been installed, users may install their own local
3011 executables in this directory with
3012 MakeMaker Makefile.PL
3013 or equivalent. See INSTALL for details.
3015 sitebinexp (sitebin.U):
3016 This is the same as the sitebin variable, but is filename expanded at
3017 configuration time, for use in your makefiles.
3019 sitelib (sitelib.U):
3020 This variable contains the eventual value of the SITELIB symbol,
3021 which is the name of the private library for this package. It may
3022 have a ~ on the front. It is up to the makefile to eventually create
3023 this directory while performing installation (with ~ substitution).
3024 The standard distribution will put nothing in this directory.
3025 After perl has been installed, users may install their own local
3026 architecture-independent modules in this directory with
3027 MakeMaker Makefile.PL
3028 or equivalent. See INSTALL for details.
3030 sitelibexp (sitelib.U):
3031 This variable is the ~name expanded version of sitelib, so that you
3032 may use it directly in Makefiles or shell scripts.
3034 siteprefix (siteprefix.U):
3035 This variable holds the full absolute path of the directory below
3036 which the user will install add-on packages.
3037 See INSTALL for usage and examples.
3039 siteprefixexp (siteprefix.U):
3040 This variable holds the full absolute path of the directory below
3041 which the user will install add-on packages. Derived from siteprefix.
3043 sizetype (sizetype.U):
3044 This variable defines sizetype to be something like size_t,
3045 unsigned long, or whatever type is used to declare length
3046 parameters for string functions.
3049 This variable is defined but not used by Configure.
3050 The value is a plain '' and is not useful.
3053 This variable is defined but not used by Configure.
3054 The value is a plain '' and is not useful.
3057 This variable contains a flag which will tell the C compiler and loader
3058 to produce a program running with a small memory model. It is up to
3059 the Makefile to use this.
3062 This variable holds the extension used to identify shared libraries
3063 (also known as shared objects) on the system. Usually set to 'so'.
3065 sockethdr (d_socket.U):
3066 This variable has any cpp '-I' flags needed for socket support.
3068 socketlib (d_socket.U):
3069 This variable has the names of any libraries needed for socket support.
3072 This variable is used internally by Configure to determine the
3073 full pathname (if any) of the sort program. After Configure runs,
3074 the value is reset to a plain "sort" and is not useful.
3076 spackage (package.U):
3077 This variable contains the name of the package being constructed,
3078 with the first letter uppercased, i.e. suitable for starting
3081 spitshell (spitshell.U):
3082 This variable contains the command necessary to spit out a runnable
3083 shell on this system. It is either cat or a grep '-v' for # comments.
3086 This variable contains a flag which will tell the C compiler and loader
3087 to produce a program that will run in separate I and D space, for those
3088 machines that support separation of instruction and data space. It is
3089 up to the Makefile to use this.
3091 sPRId64 (quadfio.U):
3092 This variable, if defined, contains the string used by stdio to
3093 format 64-bit decimal numbers (format 'd') for output.
3095 sPRIeldbl (longdblfio.U):
3096 This variable, if defined, contains the string used by stdio to
3097 format long doubles (format 'e') for output.
3099 sPRIEldbl (longdblfio.U):
3100 This variable, if defined, contains the string used by stdio to
3101 format long doubles (format 'E') for output.
3103 sPRIfldbl (longdblfio.U):
3104 This variable, if defined, contains the string used by stdio to
3105 format long doubles (format 'f') for output.
3107 sPRIFldbl (longdblfio.U):
3108 This variable, if defined, contains the string used by stdio to
3109 format long doubles (format 'F') for output.
3111 sPRIgldbl (longdblfio.U):
3112 This variable, if defined, contains the string used by stdio to
3113 format long doubles (format 'g') for output.
3115 sPRIGldbl (longdblfio.U):
3116 This variable, if defined, contains the string used by stdio to
3117 format long doubles (format 'G') for output.
3119 sPRIi64 (quadfio.U):
3120 This variable, if defined, contains the string used by stdio to
3121 format 64-bit decimal numbers (format 'i') for output.
3123 sPRIo64 (quadfio.U):
3124 This variable, if defined, contains the string used by stdio to
3125 format 64-bit octal numbers (format 'o') for output.
3127 sPRIu64 (quadfio.U):
3128 This variable, if defined, contains the string used by stdio to
3129 format 64-bit unsigned decimal numbers (format 'u') for output.
3131 sPRIx64 (quadfio.U):
3132 This variable, if defined, contains the string used by stdio to
3133 format 64-bit hexadecimal numbers (format 'x') for output.
3135 sPRIX64 (quadfio.U):
3136 This variable, if defined, contains the string used by stdio to
3137 format 64-bit hExADECimAl numbers (format 'X') for output.
3140 This variable holds the path to the package source. It is up to
3141 the Makefile to use this variable and set VPATH accordingly to
3142 find the sources remotely.
3144 ssizetype (ssizetype.U):
3145 This variable defines ssizetype to be something like ssize_t,
3146 long or int. It is used by functions that return a count
3147 of bytes or an error condition. It must be a signed type.
3148 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3150 startperl (startperl.U):
3151 This variable contains the string to put on the front of a perl
3152 script to make sure (hopefully) that it runs with perl and not some
3153 shell. Of course, that leading line must be followed by the classical
3155 eval 'exec perl -S $0 ${1+"$@"}'
3156 if $running_under_some_shell;
3157 to guarantee perl startup should the shell execute the script. Note
3158 that this magic incatation is not understood by csh.
3160 startsh (startsh.U):
3161 This variable contains the string to put on the front of a shell
3162 script to make sure (hopefully) that it runs with sh and not some
3165 static_ext (Extensions.U):
3166 This variable holds a list of XS extension files we want to
3167 link statically into the package. It is used by Makefile.
3169 stdchar (stdchar.U):
3170 This variable conditionally defines STDCHAR to be the type of char
3171 used in stdio.h. It has the values "unsigned char" or "char".
3173 stdio_base (d_stdstdio.U):
3174 This variable defines how, given a FILE pointer, fp, to access the
3175 _base field (or equivalent) of stdio.h's FILE structure. This will
3176 be used to define the macro FILE_base(fp).
3178 stdio_bufsiz (d_stdstdio.U):
3179 This variable defines how, given a FILE pointer, fp, to determine
3180 the number of bytes store in the I/O buffer pointer to by the
3181 _base field (or equivalent) of stdio.h's FILE structure. This will
3182 be used to define the macro FILE_bufsiz(fp).
3184 stdio_cnt (d_stdstdio.U):
3185 This variable defines how, given a FILE pointer, fp, to access the
3186 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3187 be used to define the macro FILE_cnt(fp).
3189 stdio_filbuf (d_stdstdio.U):
3190 This variable defines how, given a FILE pointer, fp, to tell
3191 stdio to refill it's internal buffers (?). This will
3192 be used to define the macro FILE_filbuf(fp).
3194 stdio_ptr (d_stdstdio.U):
3195 This variable defines how, given a FILE pointer, fp, to access the
3196 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3197 be used to define the macro FILE_ptr(fp).
3199 stdio_stream_array (stdio_streams.U):
3200 This variable tells the name of the array holding the stdio streams.
3201 Usual values include _iob, __iob, and __sF.
3203 strings (i_string.U):
3204 This variable holds the full path of the string header that will be
3205 used. Typically /usr/include/string.h or /usr/include/strings.h.
3208 This variable is defined but not used by Configure.
3209 The value is a plain '' and is not useful.
3211 subversion (patchlevel.U):
3212 The subversion level of this package.
3213 The value of subversion comes from the patchlevel.h file.
3214 In a version number such as 5.6.1, this is the "1".
3215 This is unique to perl.
3218 This variable holds the place where the manual is located on this
3219 system. It is not the place where the user wants to put his manual
3220 pages. Rather it is the place where Configure may look to find manual
3221 for unix commands (section 1 of the manual usually). See mansrc.
3224 This variable is defined but not used by Configure.
3225 The value is a plain '' and is not useful.
3228 This variable is defined but not used by Configure.
3229 The value is a plain '' and is not useful.
3232 This variable is defined but not used by Configure.
3233 The value is a plain '' and is not useful.
3236 This variable is defined but not used by Configure.
3237 The value is a plain '' and is not useful.
3240 This variable is used internally by Configure to determine the
3241 full pathname (if any) of the test program. After Configure runs,
3242 the value is reset to a plain "test" and is not useful.
3244 timeincl (i_time.U):
3245 This variable holds the full path of the included time header(s).
3247 timetype (d_time.U):
3248 This variable holds the type returned by time(). It can be long,
3249 or time_t on BSD sites (in which case <sys/types.h> should be
3250 included). Anyway, the type Time_t should be used.
3253 This variable is used internally by Configure to determine the
3254 full pathname (if any) of the touch program. After Configure runs,
3255 the value is reset to a plain "touch" and is not useful.
3258 This variable is used internally by Configure to determine the
3259 full pathname (if any) of the tr program. After Configure runs,
3260 the value is reset to a plain "tr" and is not useful.
3263 This variable contains the value to be passed to the tr(1)
3264 command to transliterate a newline. Typical values are
3265 '\012' and '\n'. This is needed for EBCDIC systems where
3266 newline is not necessarily '\012'.
3269 This variable is defined but not used by Configure.
3270 The value is a plain '' and is not useful.
3273 This variable is the size of an U16 in bytes.
3276 This variable contains the C type used for Perl's U16.
3279 This variable is the size of an U32 in bytes.
3282 This variable contains the C type used for Perl's U32.
3285 This variable is the size of an U64 in bytes.
3288 This variable contains the C type used for Perl's U64.
3291 This variable is the size of an U8 in bytes.
3294 This variable contains the C type used for Perl's U8.
3297 This variable contains the format string used for printing a Uid_t.
3299 uidsign (uidsign.U):
3300 This variable contains the signedness of a uidtype.
3301 1 for unsigned, -1 for signed.
3303 uidsize (uidsize.U):
3304 This variable contains the size of a uidtype in bytes.
3306 uidtype (uidtype.U):
3307 This variable defines Uid_t to be something like uid_t, int,
3308 ushort, or whatever type is used to declare user ids in the kernel.
3311 This variable is used internally by Configure to determine the
3312 full pathname (if any) of the uname program. After Configure runs,
3313 the value is reset to a plain "uname" and is not useful.
3316 This variable is used internally by Configure to determine the
3317 full pathname (if any) of the uniq program. After Configure runs,
3318 the value is reset to a plain "uniq" and is not useful.
3320 uquadtype (quadtype.U):
3321 This variable defines Uquad_t to be something like unsigned long,
3322 unsigned int, unsigned long long, uint64_t, or whatever type is
3323 used for 64-bit integers.
3325 use5005threads (usethreads.U):
3326 This variable conditionally defines the USE_5005THREADS symbol,
3327 and indicates that Perl should be built to use the 5.005-based
3328 threading implementation.
3330 use64bits (use64bits.U):
3331 This variable conditionally defines the USE_64_BITS symbol,
3332 and indicates that 64-bit integer types should be used
3336 This variable indicates if the system supports dynamic
3337 loading of some sort. See also dlsrc and dlobj.
3339 useithreads (usethreads.U):
3340 This variable conditionally defines the USE_ITHREADS symbol,
3341 and indicates that Perl should be built to use the interpreter-based
3342 threading implementation.
3344 uselargefiles (uselfs.U):
3345 This variable conditionally defines the USE_LARGE_FILES symbol,
3346 and indicates that large file interfaces should be used when
3347 available. The use64bits symbol will also be turned on if necessary.
3349 uselongdouble (uselongdbl.U):
3350 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3351 and indicates that long doubles should be used when available.
3353 usemorebits (usemorebits.U):
3354 This variable conditionally defines the USE_MORE_BITS symbol,
3355 and indicates that explicit 64-bit interfaces and long doubles
3356 should be used when available.
3358 usemultiplicity (usemultiplicity.U):
3359 This variable conditionally defines the MULTIPLICITY symbol,
3360 and indicates that Perl should be built to use multiplicity.
3362 usemymalloc (mallocsrc.U):
3363 This variable contains y if the malloc that comes with this package
3364 is desired over the system's version of malloc. People often include
3365 special versions of malloc for effiency, but such versions are often
3366 less portable. See also mallocsrc and mallocobj.
3367 If this is 'y', then -lmalloc is removed from $libs.
3370 This variable contains 'true' or 'false' depending whether the
3371 nm extraction is wanted or not.
3373 useopcode (Extensions.U):
3374 This variable holds either 'true' or 'false' to indicate
3375 whether the Opcode extension should be used. The sole
3376 use for this currently is to allow an easy mechanism
3377 for users to skip the Opcode extension from the Configure
3380 useperlio (useperlio.U):
3381 This variable conditionally defines the USE_PERLIO symbol,
3382 and indicates that the PerlIO abstraction should be
3385 useposix (Extensions.U):
3386 This variable holds either 'true' or 'false' to indicate
3387 whether the POSIX extension should be used. The sole
3388 use for this currently is to allow an easy mechanism
3389 for hints files to indicate that POSIX will not compile
3390 on a particular system.
3393 This variable is set to true when the user agrees to use sfio.
3394 It is set to false when sfio is not available or when the user
3395 explicitely requests not to use sfio. It is here primarily so
3396 that command-line settings can override the auto-detection of
3397 d_sfio without running into a "WHOA THERE".
3399 useshrplib (libperl.U):
3400 This variable is set to 'yes' if the user wishes
3401 to build a shared libperl, and 'no' otherwise.
3403 usesocks (usesocks.U):
3404 This variable conditionally defines the USE_SOCKS symbol,
3405 and indicates that Perl should be built to use SOCKS.
3407 usethreads (usethreads.U):
3408 This variable conditionally defines the USE_THREADS symbol,
3409 and indicates that Perl should be built to use threads.
3411 usevendorprefix (vendorprefix.U):
3412 This variable tells whether the vendorprefix
3413 and consequently other vendor* paths are in use.
3415 usevfork (d_vfork.U):
3416 This variable is set to true when the user accepts to use vfork.
3417 It is set to false when no vfork is available or when the user
3418 explicitely requests not to use vfork.
3421 This variable holds the path of the include files, which is
3422 usually /usr/include. It is mainly used by other Configure units.
3425 This variable is defined but not used by Configure.
3426 The value is a plain '' and is not useful.
3428 uvoformat (perlxvf.U):
3429 This variable contains the format string used for printing
3430 a Perl UV as an unsigned octal integer.
3433 This variable is the size of a UV in bytes.
3436 This variable contains the C type used for Perl's UV.
3438 uvuformat (perlxvf.U):
3439 This variable contains the format string used for printing
3440 a Perl UV as an unsigned decimal integer.
3442 uvxformat (perlxvf.U):
3443 This variable contains the format string used for printing
3444 a Perl UV as an unsigned hexadecimal integer.
3446 vendorbin (vendorbin.U):
3447 This variable contains the eventual value of the VENDORBIN symbol.
3448 It may have a ~ on the front.
3449 The standard distribution will put nothing in this directory.
3450 Vendors who distribute perl may wish to place additional
3451 binaries in this directory with
3452 MakeMaker Makefile.PL INSTALLDIRS=vendor
3453 or equivalent. See INSTALL for details.
3455 vendorbinexp (vendorbin.U):
3456 This variable is the ~name expanded version of vendorbin, so that you
3457 may use it directly in Makefiles or shell scripts.
3459 vendorlib (vendorlib.U):
3460 This variable contains the eventual value of the VENDORLIB symbol,
3461 which is the name of the private library for this package.
3462 The standard distribution will put nothing in this directory.
3463 Vendors who distribute perl may wish to place their own
3464 modules in this directory with
3465 MakeMaker Makefile.PL INSTALLDIRS=vendor
3466 or equivalent. See INSTALL for details.
3468 vendorlibexp (vendorlib.U):
3469 This variable is the ~name expanded version of vendorlib, so that you
3470 may use it directly in Makefiles or shell scripts.
3472 vendorprefix (vendorprefix.U):
3473 This variable holds the full absolute path of the directory below
3474 which the vendor will install add-on packages.
3475 See INSTALL for usage and examples.
3477 vendorprefixexp (vendorprefix.U):
3478 This variable holds the full absolute path of the directory below
3479 which the vendor will install add-on packages. Derived from vendorprefix.
3481 version (patchlevel.U):
3482 The full version number of this package, such as 5.6.1 (or 5_6_1).
3483 This combines baserev, patchlevel, and subversion to get the
3484 full version number, including any possible subversions.
3485 This is suitable for use as a directory name, and hence is
3486 filesystem dependent.
3489 This variable is defined but not used by Configure.
3490 The value is a plain '' and is not useful.
3492 voidflags (voidflags.U):
3493 This variable contains the eventual value of the VOIDFLAGS symbol,
3494 which indicates how much support of the void type is given by this
3495 compiler. See VOIDFLAGS for more info.
3498 This variable holds extra path (space-separated) used to find
3499 libraries on this platform, for example CPU-specific libraries
3500 (on multi-CPU platforms) may be listed here.
3502 xs_apiversion (xs_apiversion.U):
3503 This variable contains the version of the oldest perl binary
3504 compatible with the present perl. perl.c:incpush() and
3505 lib/lib.pm will automatically search in $sitearch for older
3506 directories across major versions back to xs_apiversion.
3507 This is only useful if you have a perl library directory tree
3508 structured like the default one.
3509 See INSTALL for how this works.
3510 The versioned site_perl directory was introduced in 5.005,
3511 so that is the lowest possible value.
3512 Since this can depend on compile time options (such as
3513 bincompat) it is set by Configure. Other non-default sources
3514 of potential incompatibility, such as multiplicity, threads,
3515 debugging, 64bits, sfio, etc., are not checked for currently,
3516 though in principle we could go snooping around in old
3520 This variable is defined but not used by Configure.
3521 The value is a plain '' and is not useful.
3524 This variable is used internally by Configure to determine the
3525 full pathname (if any) of the zip program. After Configure runs,
3526 the value is reset to a plain "zip" and is not useful.