1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double. Usual values are 2, 4 and 8.
31 ansi2knr (ansi2knr.U):
32 This variable is set if the user needs to run ansi2knr.
33 Currently, this is not supported, so we just abort.
35 aphostname (d_gethname.U):
36 This variable contains the command which can be used to compute the
37 host name. The command is fully qualified by its absolute path, to make
38 it safe when used by a process with super-user privileges.
40 apiversion (patchlevel.U):
41 MakeMaker will install add-on modules in a directory with the
42 PERL_APIVERSION version number. The value is set manually in
43 patchlevel.h. Normally, for maintenance releases, this is
44 just something like 5.005 or 5.6 or 5.7. That is, it does not
45 include the subversion number and does not change across
46 maintenance releases. This is so that add-on extensions can
47 be shared across maintenance versions. It is unclear how this
48 ought to work for developer versions. If a release breaks
49 binary compatibility, this number should be increased.
52 This variable is used internally by Configure to determine the
53 full pathname (if any) of the ar program. After Configure runs,
54 the value is reset to a plain "ar" and is not useful.
57 This variable holds the name of the directory in which the user wants
58 to put architecture-dependent public library files for $package.
59 It is most often a local directory such as /usr/local/lib.
60 Programs using this variable must be prepared to deal
61 with filename expansion.
63 archlibexp (archlib.U):
64 This variable is the same as the archlib variable, but is
65 filename expanded at configuration time, for convenient use.
67 archname64 (use64bits.U):
68 This variable is used for the 64-bitness part of $archname.
70 archname (archname.U):
71 This variable is a short name to characterize the current
72 architecture. It is used mainly to construct the default archlib.
75 This variable defines any additional objects that must be linked
76 in with the program on this architecture. On unix, it is usually
77 empty. It is typically used to include emulations of unix calls
78 or other facilities. For perl on OS/2, for example, this would
82 This variable is used internally by Configure to determine the
83 full pathname (if any) of the awk program. After Configure runs,
84 the value is reset to a plain "awk" and is not useful.
87 The base revision level of this package, from the .package file.
90 This variable is defined but not used by Configure.
91 The value is a plain '' and is not useful.
94 This variable holds the name of the directory in which the user wants
95 to put publicly executable images for the package in question. It
96 is most often a local directory such as /usr/local/bin. Programs using
97 this variable must be prepared to deal with ~name substitution.
99 bincompat5005 (bincompat5005.U):
100 This variable contains y if Perl 5.006 should be binary-compatible
104 This is the same as the bin variable, but is filename expanded at
105 configuration time, for use in your makefiles.
108 This variable is defined but not used by Configure.
109 The value is a plain '' and is not useful.
112 This variable is used internally by Configure to determine the
113 full pathname (if any) of the byacc program. After Configure runs,
114 the value is reset to a plain "byacc" and is not useful.
116 byteorder (byteorder.U):
117 This variable holds the byte order. In the following, larger digits
118 indicate more significance. The variable byteorder is either 4321
119 on a big-endian machine, or 1234 on a little-endian, or 87654321
120 on a Cray ... or 3412 with weird order !
123 This variable contains the \c string if that is what causes the echo
124 command to suppress newline. Otherwise it is null. Correct usage is
125 $echo $n "prompt for a question: $c".
127 castflags (d_castneg.U):
128 This variable contains a flag that precise difficulties the
129 compiler has casting odd floating values to unsigned long:
131 1 = couldn't cast < 0
132 2 = couldn't cast >= 0x80000000
133 4 = couldn't cast in argument expression list
136 This variable is used internally by Configure to determine the
137 full pathname (if any) of the cat program. After Configure runs,
138 the value is reset to a plain "cat" and is not useful.
141 This variable holds the name of a command to execute a C compiler which
142 can resolve multiple global references that happen to have the same
143 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
145 cccdlflags (dlsrc.U):
146 This variable contains any special flags that might need to be
147 passed with 'cc -c' to compile modules to be used to create a shared
148 library that will be used for dynamic loading. For hpux, this
149 should be +z. It is up to the makefile to use it.
152 This variable contains any special flags that might need to be
153 passed to cc to link with a shared library for dynamic loading.
154 It is up to the makefile to use it. For sunos 4.1, it should
158 This variable contains any additional C compiler flags desired by
159 the user. It is up to the Makefile to use this.
161 ccsymbols (Cppsym.U):
162 The variable contains the symbols defined by the C compiler alone.
163 The symbols defined by cpp or by cc when it calls cpp are not in
164 this list, see cppsymbols and cppccsymbols.
165 The list is a space-separated list of symbol=value tokens.
168 Login name of the person who ran the Configure script and answered the
169 questions. This is used to tag both config.sh and config_h.SH.
171 cf_email (cf_email.U):
172 Electronic mail address of the person who ran Configure. This can be
173 used by units that require the user's e-mail, like MailList.U.
176 Holds the output of the "date" command when the configuration file was
177 produced. This is used to tag both config.sh and config_h.SH.
180 This variable is defined but not used by Configure.
181 The value is a plain '' and is not useful.
184 This variable is defined but not used by Configure.
185 The value is a plain '' and is not useful.
188 This variable is defined but not used by Configure.
189 The value is a plain '' and is not useful.
191 clocktype (d_times.U):
192 This variable holds the type returned by times(). It can be long,
193 or clock_t on BSD sites (in which case <sys/types.h> should be
197 This variable is used internally by Configure to determine the
198 full pathname (if any) of the comm program. After Configure runs,
199 the value is reset to a plain "comm" and is not useful.
202 This variable is defined but not used by Configure.
203 The value is a plain '' and is not useful.
205 CONFIGDOTSH (Oldsyms.U):
206 This is set to 'true' in config.sh so that a shell script
207 sourcing config.sh can tell if it has been sourced already.
209 contains (contains.U):
210 This variable holds the command to do a grep with a proper return
211 status. On most sane systems it is simply "grep". On insane systems
212 it is a grep followed by a cat followed by a test. This variable
213 is primarily for the use of other Configure units.
216 This variable is used internally by Configure to determine the
217 full pathname (if any) of the cp program. After Configure runs,
218 the value is reset to a plain "cp" and is not useful.
221 This variable is defined but not used by Configure.
222 The value is a plain '' and is not useful.
225 This variable is used internally by Configure to determine the
226 full pathname (if any) of the cpp program. After Configure runs,
227 the value is reset to a plain "cpp" and is not useful.
229 cpp_stuff (cpp_stuff.U):
230 This variable contains an identification of the catenation mechanism
231 used by the C preprocessor.
233 cppccsymbols (Cppsym.U):
234 The variable contains the symbols defined by the C compiler when
235 when it calls cpp. The symbols defined by the cc alone or cpp
236 alone are not in this list, see ccsymbols and cppsymbols.
237 The list is a space-separated list of symbol=value tokens.
239 cppflags (ccflags.U):
240 This variable holds the flags that will be passed to the C pre-
241 processor. It is up to the Makefile to use it.
243 cpplast (cppstdin.U):
244 This variable has the same functionality as cppminus, only it applies
245 to cpprun and not cppstdin.
247 cppminus (cppstdin.U):
248 This variable contains the second part of the string which will invoke
249 the C preprocessor on the standard input and produce to standard
250 output. This variable will have the value "-" if cppstdin needs
251 a minus to specify standard input, otherwise the value is "".
254 This variable contains the command which will invoke a C preprocessor
255 on standard input and put the output to stdout. It is guaranteed not
256 to be a wrapper and may be a null string if no preprocessor can be
257 made directly available. This preprocessor might be different from the
258 one used by the C compiler. Don't forget to append cpplast after the
259 preprocessor options.
261 cppstdin (cppstdin.U):
262 This variable contains the command which will invoke the C
263 preprocessor on standard input and put the output to stdout.
264 It is primarily used by other Configure units that ask about
265 preprocessor symbols.
267 cppsymbols (Cppsym.U):
268 The variable contains the symbols defined by the C preprocessor
269 alone. The symbols defined by cc or by cc when it calls cpp are
270 not in this list, see ccsymbols and cppccsymbols.
271 The list is a space-separated list of symbol=value tokens.
273 crosscompile (crosscompile.U):
274 This variable conditionally defines the CROSSCOMPILE symbol
275 which signifies that the build process is be a cross-compilation.
276 This is normally set by hints files or from Configure command line.
278 cryptlib (d_crypt.U):
279 This variable holds -lcrypt or the path to a libcrypt.a archive if
280 the crypt() function is not defined in the standard C library. It is
281 up to the Makefile to use this.
284 This variable is used internally by Configure to determine the
285 full pathname (if any) of the csh program. After Configure runs,
286 the value is reset to a plain "csh" and is not useful.
288 d_access (d_access.U):
289 This variable conditionally defines HAS_ACCESS if the access() system
290 call is available to check for access permissions using real IDs.
292 d_accessx (d_accessx.U):
293 This variable conditionally defines the HAS_ACCESSX symbol, which
294 indicates to the C program that the accessx() routine is available.
297 This variable conditionally defines the HAS_ALARM symbol, which
298 indicates to the C program that the alarm() routine is available.
300 d_archlib (archlib.U):
301 This variable conditionally defines ARCHLIB to hold the pathname
302 of architecture-dependent library files for $package. If
303 $archlib is the same as $privlib, then this is set to undef.
306 This variable conditionally defines the HAS_ATOLF symbol, which
307 indicates to the C program that the atolf() routine is available.
310 This variable conditionally defines the HAS_ATOLL symbol, which
311 indicates to the C program that the atoll() routine is available.
313 d_attribut (d_attribut.U):
314 This variable conditionally defines HASATTRIBUTE, which
315 indicates the C compiler can check for function attributes,
316 such as printf formats.
319 This variable conditionally defines the HAS_BCMP symbol if
320 the bcmp() routine is available to compare strings.
323 This variable conditionally defines the HAS_BCOPY symbol if
324 the bcopy() routine is available to copy strings.
326 d_bincompat5005 (bincompat5005.U):
327 This variable conditionally defines BINCOMPAT5005 so that embed.h
328 can take special action if Perl 5.006 should be binary-compatible
329 with Perl 5.005. This is impossible for builds that use features
330 like threads and multiplicity it is always $undef for those versions.
333 This symbol conditionally defines the symbol BSD when running on a
336 d_bsdgetpgrp (d_getpgrp.U):
337 This variable conditionally defines USE_BSD_GETPGRP if
338 getpgrp needs one arguments whereas USG one needs none.
340 d_bsdsetpgrp (d_setpgrp.U):
341 This variable conditionally defines USE_BSD_SETPGRP if
342 setpgrp needs two arguments whereas USG one needs none.
343 See also d_setpgid for a POSIX interface.
346 This variable conditionally defines the HAS_BZERO symbol if
347 the bzero() routine is available to set memory to 0.
349 d_casti32 (d_casti32.U):
350 This variable conditionally defines CASTI32, which indicates
351 whether the C compiler can cast large floats to 32-bit ints.
353 d_castneg (d_castneg.U):
354 This variable conditionally defines CASTNEG, which indicates
355 wether the C compiler can cast negative float to unsigned.
357 d_charvspr (d_vprintf.U):
358 This variable conditionally defines CHARVSPRINTF if this system
359 has vsprintf returning type (char*). The trend seems to be to
360 declare it as "int vsprintf()".
363 This variable conditionally defines the HAS_CHOWN symbol, which
364 indicates to the C program that the chown() routine is available.
366 d_chroot (d_chroot.U):
367 This variable conditionally defines the HAS_CHROOT symbol, which
368 indicates to the C program that the chroot() routine is available.
370 d_chsize (d_chsize.U):
371 This variable conditionally defines the CHSIZE symbol, which
372 indicates to the C program that the chsize() routine is available
373 to truncate files. You might need a -lx to get this routine.
375 d_closedir (d_closedir.U):
376 This variable conditionally defines HAS_CLOSEDIR if closedir() is
379 d_cmsghdr_s (d_socket.U):
380 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
381 which indicates that the the struct cmsghdr is supported.
384 This variable conditionally defines the HASCONST symbol, which
385 indicates to the C program that this C compiler knows about the
389 This variable conditionally defines the CRYPT symbol, which
390 indicates to the C program that the crypt() routine is available
391 to encrypt passwords and the like.
394 This variable conditionally defines the CSH symbol, which
395 indicates to the C program that the C-shell exists.
397 d_cuserid (d_cuserid.U):
398 This variable conditionally defines the HAS_CUSERID symbol, which
399 indicates to the C program that the cuserid() routine is available
400 to get character login names.
402 d_dbl_dig (d_dbl_dig.U):
403 This variable conditionally defines d_dbl_dig if this system's
404 header files provide DBL_DIG, which is the number of significant
405 digits in a double precision number.
407 d_difftime (d_difftime.U):
408 This variable conditionally defines the HAS_DIFFTIME symbol, which
409 indicates to the C program that the difftime() routine is available.
411 d_dirnamlen (i_dirent.U):
412 This variable conditionally defines DIRNAMLEN, which indicates
413 to the C program that the length of directory entry names is
414 provided by a d_namelen field.
416 d_dlerror (d_dlerror.U):
417 This variable conditionally defines the HAS_DLERROR symbol, which
418 indicates to the C program that the dlerror() routine is available.
420 d_dlopen (d_dlopen.U):
421 This variable conditionally defines the HAS_DLOPEN symbol, which
422 indicates to the C program that the dlopen() routine is available.
424 d_dlsymun (d_dlsymun.U):
425 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
426 indicates that we need to prepend an underscore to the symbol
427 name before calling dlsym().
429 d_dosuid (d_dosuid.U):
430 This variable conditionally defines the symbol DOSUID, which
431 tells the C program that it should insert setuid emulation code
432 on hosts which have setuid #! scripts disabled.
434 d_drand48proto (d_drand48proto.U):
435 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
436 which indicates to the C program that the system provides
437 a prototype for the drand48() function. Otherwise, it is
438 up to the program to supply one.
441 This variable conditionally defines HAS_DUP2 if dup2() is
442 available to duplicate file descriptors.
444 d_eaccess (d_eaccess.U):
445 This variable conditionally defines the HAS_EACCESS symbol, which
446 indicates to the C program that the eaccess() routine is available.
448 d_endgrent (d_endgrent.U):
449 This variable conditionally defines the HAS_ENDGRENT symbol, which
450 indicates to the C program that the endgrent() routine is available
451 for sequential access of the group database.
453 d_endhent (d_endhent.U):
454 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
455 available to close whatever was being used for host queries.
457 d_endnent (d_endnent.U):
458 This variable conditionally defines HAS_ENDNETENT if endnetent() is
459 available to close whatever was being used for network queries.
461 d_endpent (d_endpent.U):
462 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
463 available to close whatever was being used for protocol queries.
465 d_endpwent (d_endpwent.U):
466 This variable conditionally defines the HAS_ENDPWENT symbol, which
467 indicates to the C program that the endpwent() routine is available
468 for sequential access of the passwd database.
470 d_endsent (d_endsent.U):
471 This variable conditionally defines HAS_ENDSERVENT if endservent() is
472 available to close whatever was being used for service queries.
474 d_endspent (d_endspent.U):
475 This variable conditionally defines HAS_ENDSPENT if endspent() is
476 available to finalize the scan of SysV shadow password entries.
478 d_eofnblk (nblock_io.U):
479 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
480 when reading from a non-blocking I/O source.
483 This variable conditionally defines the symbols EUNICE and VAX, which
484 alerts the C program that it must deal with ideosyncracies of VMS.
486 d_fchmod (d_fchmod.U):
487 This variable conditionally defines the HAS_FCHMOD symbol, which
488 indicates to the C program that the fchmod() routine is available
489 to change mode of opened files.
491 d_fchown (d_fchown.U):
492 This variable conditionally defines the HAS_FCHOWN symbol, which
493 indicates to the C program that the fchown() routine is available
494 to change ownership of opened files.
497 This variable conditionally defines the HAS_FCNTL symbol, and indicates
498 whether the fcntl() function exists
500 d_fd_macros (d_fd_set.U):
501 This variable contains the eventual value of the HAS_FD_MACROS symbol,
502 which indicates if your C compiler knows about the macros which
503 manipulate an fd_set.
505 d_fd_set (d_fd_set.U):
506 This variable contains the eventual value of the HAS_FD_SET symbol,
507 which indicates if your C compiler knows about the fd_set typedef.
509 d_fds_bits (d_fd_set.U):
510 This variable contains the eventual value of the HAS_FDS_BITS symbol,
511 which indicates if your fd_set typedef contains the fds_bits member.
512 If you have an fd_set typedef, but the dweebs who installed it did
513 a half-fast job and neglected to provide the macros to manipulate
514 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
516 d_fgetpos (d_fgetpos.U):
517 This variable conditionally defines HAS_FGETPOS if fgetpos() is
518 available to get the file position indicator.
520 d_flexfnam (d_flexfnam.U):
521 This variable conditionally defines the FLEXFILENAMES symbol, which
522 indicates that the system supports filenames longer than 14 characters.
525 This variable conditionally defines HAS_FLOCK if flock() is
526 available to do file locking.
529 This variable conditionally defines the HAS_FORK symbol, which
530 indicates to the C program that the fork() routine is available.
532 d_fpathconf (d_pathconf.U):
533 This variable conditionally defines the HAS_FPATHCONF symbol, which
534 indicates to the C program that the pathconf() routine is available
535 to determine file-system related limits and options associated
536 with a given open file descriptor.
539 This symbol will be defined if the C compiler supports fpos64_t.
541 d_fs_data_s (d_fs_data_s.U):
542 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
543 which indicates that the struct fs_data is supported.
545 d_fseeko (d_fseeko.U):
546 This variable conditionally defines the HAS_FSEEKO symbol, which
547 indicates to the C program that the fseeko() routine is available.
549 d_fsetpos (d_fsetpos.U):
550 This variable conditionally defines HAS_FSETPOS if fsetpos() is
551 available to set the file position indicator.
553 d_fstatfs (d_fstatfs.U):
554 This variable conditionally defines the HAS_FSTATFS symbol, which
555 indicates to the C program that the fstatfs() routine is available.
557 d_fstatvfs (d_statvfs.U):
558 This variable conditionally defines the HAS_FSTATVFS symbol, which
559 indicates to the C program that the fstatvfs() routine is available.
561 d_ftello (d_ftello.U):
562 This variable conditionally defines the HAS_FTELLO symbol, which
563 indicates to the C program that the ftello() routine is available.
566 This variable conditionally defines the HAS_FTIME symbol, which indicates
567 that the ftime() routine exists. The ftime() routine is basically
568 a sub-second accuracy clock.
570 d_Gconvert (d_gconvert.U):
571 This variable holds what Gconvert is defined as to convert
572 floating point numbers into strings. It could be 'gconvert'
573 or a more complex macro emulating gconvert with gcvt() or sprintf.
575 d_Gconvert='gconvert((x),(n),(t),(b))'
576 d_Gconvert='gcvt((x),(n),(b))'
577 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
579 d_getgrent (d_getgrent.U):
580 This variable conditionally defines the HAS_GETGRENT symbol, which
581 indicates to the C program that the getgrent() routine is available
582 for sequential access of the group database.
584 d_getgrps (d_getgrps.U):
585 This variable conditionally defines the HAS_GETGROUPS symbol, which
586 indicates to the C program that the getgroups() routine is available
587 to get the list of process groups.
589 d_gethbyaddr (d_gethbyad.U):
590 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
591 indicates to the C program that the gethostbyaddr() routine is available
592 to look up hosts by their IP addresses.
594 d_gethbyname (d_gethbynm.U):
595 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
596 indicates to the C program that the gethostbyname() routine is available
597 to look up host names in some data base or other.
599 d_gethent (d_gethent.U):
600 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
601 available to look up host names in some data base or another.
603 d_gethname (d_gethname.U):
604 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
605 indicates to the C program that the gethostname() routine may be
606 used to derive the host name.
608 d_gethostprotos (d_gethostprotos.U):
609 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
610 which indicates to the C program that <netdb.h> supplies
611 prototypes for the various gethost*() functions.
612 See also netdbtype.U for probing for various netdb types.
614 d_getlogin (d_getlogin.U):
615 This variable conditionally defines the HAS_GETLOGIN symbol, which
616 indicates to the C program that the getlogin() routine is available
617 to get the login name.
619 d_getmnt (d_getmnt.U):
620 This variable conditionally defines the HAS_GETMNT symbol, which
621 indicates to the C program that the getmnt() routine is available
622 to retrieve one or more mount info blocks by filename.
624 d_getmntent (d_getmntent.U):
625 This variable conditionally defines the HAS_GETMNTENT symbol, which
626 indicates to the C program that the getmntent() routine is available
627 to iterate through mounted files to get their mount info.
629 d_getnbyaddr (d_getnbyad.U):
630 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
631 indicates to the C program that the getnetbyaddr() routine is available
632 to look up networks by their IP addresses.
634 d_getnbyname (d_getnbynm.U):
635 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
636 indicates to the C program that the getnetbyname() routine is available
637 to look up networks by their names.
639 d_getnent (d_getnent.U):
640 This variable conditionally defines HAS_GETNETENT if getnetent() is
641 available to look up network names in some data base or another.
643 d_getnetprotos (d_getnetprotos.U):
644 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
645 which indicates to the C program that <netdb.h> supplies
646 prototypes for the various getnet*() functions.
647 See also netdbtype.U for probing for various netdb types.
649 d_getpbyname (d_getprotby.U):
650 This variable conditionally defines the HAS_GETPROTOBYNAME
651 symbol, which indicates to the C program that the
652 getprotobyname() routine is available to look up protocols
655 d_getpbynumber (d_getprotby.U):
656 This variable conditionally defines the HAS_GETPROTOBYNUMBER
657 symbol, which indicates to the C program that the
658 getprotobynumber() routine is available to look up protocols
661 d_getpent (d_getpent.U):
662 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
663 available to look up protocols in some data base or another.
665 d_getpgid (d_getpgid.U):
666 This variable conditionally defines the HAS_GETPGID symbol, which
667 indicates to the C program that the getpgid(pid) function
668 is available to get the process group id.
670 d_getpgrp2 (d_getpgrp2.U):
671 This variable conditionally defines the HAS_GETPGRP2 symbol, which
672 indicates to the C program that the getpgrp2() (as in DG/UX) routine
673 is available to get the current process group.
675 d_getpgrp (d_getpgrp.U):
676 This variable conditionally defines HAS_GETPGRP if getpgrp() is
677 available to get the current process group.
679 d_getppid (d_getppid.U):
680 This variable conditionally defines the HAS_GETPPID symbol, which
681 indicates to the C program that the getppid() routine is available
682 to get the parent process ID.
684 d_getprior (d_getprior.U):
685 This variable conditionally defines HAS_GETPRIORITY if getpriority()
686 is available to get a process's priority.
688 d_getprotoprotos (d_getprotoprotos.U):
689 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
690 which indicates to the C program that <netdb.h> supplies
691 prototypes for the various getproto*() functions.
692 See also netdbtype.U for probing for various netdb types.
694 d_getpwent (d_getpwent.U):
695 This variable conditionally defines the HAS_GETPWENT symbol, which
696 indicates to the C program that the getpwent() routine is available
697 for sequential access of the passwd database.
699 d_getsbyname (d_getsrvby.U):
700 This variable conditionally defines the HAS_GETSERVBYNAME
701 symbol, which indicates to the C program that the
702 getservbyname() routine is available to look up services
705 d_getsbyport (d_getsrvby.U):
706 This variable conditionally defines the HAS_GETSERVBYPORT
707 symbol, which indicates to the C program that the
708 getservbyport() routine is available to look up services
711 d_getsent (d_getsent.U):
712 This variable conditionally defines HAS_GETSERVENT if getservent() is
713 available to look up network services in some data base or another.
715 d_getservprotos (d_getservprotos.U):
716 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
717 which indicates to the C program that <netdb.h> supplies
718 prototypes for the various getserv*() functions.
719 See also netdbtype.U for probing for various netdb types.
721 d_getspent (d_getspent.U):
722 This variable conditionally defines HAS_GETSPENT if getspent() is
723 available to retrieve SysV shadow password entries sequentially.
725 d_getspnam (d_getspnam.U):
726 This variable conditionally defines HAS_GETSPNAM if getspnam() is
727 available to retrieve SysV shadow password entries by name.
729 d_gettimeod (d_ftime.U):
730 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
731 indicates that the gettimeofday() system call exists (to obtain a
732 sub-second accuracy clock). You should probably include <sys/resource.h>.
734 d_gnulibc (d_gnulibc.U):
735 Defined if we're dealing with the GNU C Library.
737 d_grpasswd (i_grp.U):
738 This variable conditionally defines GRPASSWD, which indicates
739 that struct group in <grp.h> contains gr_passwd.
741 d_hasmntopt (d_hasmntopt.U):
742 This variable conditionally defines the HAS_HASMNTOPT symbol, which
743 indicates to the C program that the hasmntopt() routine is available
744 to query the mount options of file systems.
747 This variable conditionally defines HAS_HTONL if htonl() and its
748 friends are available to do network order byte swapping.
750 d_index (d_strchr.U):
751 This variable conditionally defines HAS_INDEX if index() and
752 rindex() are available for string searching.
754 d_inetaton (d_inetaton.U):
755 This variable conditionally defines the HAS_INET_ATON symbol, which
756 indicates to the C program that the inet_aton() function is available
757 to parse IP address "dotted-quad" strings.
759 d_int64t (i_inttypes.U):
760 This symbol will be defined if the C compiler supports int64_t.
762 d_iovec_s (i_sysuio.U):
763 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
764 which indicates that the struct iovec is supported.
766 d_isascii (d_isascii.U):
767 This variable conditionally defines the HAS_ISASCII constant,
768 which indicates to the C program that isascii() is available.
770 d_killpg (d_killpg.U):
771 This variable conditionally defines the HAS_KILLPG symbol, which
772 indicates to the C program that the killpg() routine is available
773 to kill process groups.
775 d_lchown (d_lchown.U):
776 This variable conditionally defines the HAS_LCHOWN symbol, which
777 indicates to the C program that the lchown() routine is available
778 to operate on a symbolic link (instead of following the link).
780 d_ldbl_dig (d_ldbl_dig.U):
781 This variable conditionally defines d_ldbl_dig if this system's
782 header files provide LDBL_DIG, which is the number of significant
783 digits in a long double precision number.
786 This variable conditionally defines HAS_LINK if link() is
787 available to create hard links.
790 This variable conditionally defines the HAS_LLSEEK symbol, which
791 indicates to the C program that the llseek() routine is available.
793 d_locconv (d_locconv.U):
794 This variable conditionally defines HAS_LOCALECONV if localeconv() is
795 available for numeric and monetary formatting conventions.
798 This variable conditionally defines HAS_LOCKF if lockf() is
799 available to do file locking.
801 d_longdbl (d_longdbl.U):
802 This variable conditionally defines HAS_LONG_DOUBLE if
803 the long double type is supported.
805 d_longlong (d_longlong.U):
806 This variable conditionally defines HAS_LONG_LONG if
807 the long long type is supported.
810 This variable conditionally defines HAS_LSTAT if lstat() is
811 available to do file stats on symbolic links.
813 d_madvise (d_madvise.U):
814 This variable conditionally defines HAS_MADVISE if madvise() is
815 available to map a file into memory.
818 This variable conditionally defines the HAS_MBLEN symbol, which
819 indicates to the C program that the mblen() routine is available
820 to find the number of bytes in a multibye character.
822 d_mbstowcs (d_mbstowcs.U):
823 This variable conditionally defines the HAS_MBSTOWCS symbol, which
824 indicates to the C program that the mbstowcs() routine is available
825 to convert a multibyte string into a wide character string.
827 d_mbtowc (d_mbtowc.U):
828 This variable conditionally defines the HAS_MBTOWC symbol, which
829 indicates to the C program that the mbtowc() routine is available
830 to convert multibyte to a wide character.
832 d_memchr (d_memchr.U):
833 This variable conditionally defines the HAS_MEMCHR symbol, which
834 indicates to the C program that the memchr() routine is available
835 to locate characters within a C string.
837 d_memcmp (d_memcmp.U):
838 This variable conditionally defines the HAS_MEMCMP symbol, which
839 indicates to the C program that the memcmp() routine is available
840 to compare blocks of memory.
842 d_memcpy (d_memcpy.U):
843 This variable conditionally defines the HAS_MEMCPY symbol, which
844 indicates to the C program that the memcpy() routine is available
845 to copy blocks of memory.
847 d_memmove (d_memmove.U):
848 This variable conditionally defines the HAS_MEMMOVE symbol, which
849 indicates to the C program that the memmove() routine is available
850 to copy potentatially overlapping blocks of memory.
852 d_memset (d_memset.U):
853 This variable conditionally defines the HAS_MEMSET symbol, which
854 indicates to the C program that the memset() routine is available
855 to set blocks of memory.
858 This variable conditionally defines the HAS_MKDIR symbol, which
859 indicates to the C program that the mkdir() routine is available
860 to create directories..
862 d_mkfifo (d_mkfifo.U):
863 This variable conditionally defines the HAS_MKFIFO symbol, which
864 indicates to the C program that the mkfifo() routine is available.
866 d_mktime (d_mktime.U):
867 This variable conditionally defines the HAS_MKTIME symbol, which
868 indicates to the C program that the mktime() routine is available.
871 This variable conditionally defines HAS_MMAP if mmap() is
872 available to map a file into memory.
874 d_mprotect (d_mprotect.U):
875 This variable conditionally defines HAS_MPROTECT if mprotect() is
876 available to modify the access protection of a memory mapped file.
879 This variable conditionally defines the HAS_MSG symbol, which
880 indicates that the entire msg*(2) library is present.
882 d_msg_ctrunc (d_socket.U):
883 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
884 which indicates that the MSG_CTRUNC is available. #ifdef is
885 not enough because it may be an enum, glibc has been known to do this.
887 d_msg_dontroute (d_socket.U):
888 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
889 which indicates that the MSG_DONTROUTE is available. #ifdef is
890 not enough because it may be an enum, glibc has been known to do this.
892 d_msg_oob (d_socket.U):
893 This variable conditionally defines the HAS_MSG_OOB symbol,
894 which indicates that the MSG_OOB is available. #ifdef is
895 not enough because it may be an enum, glibc has been known to do this.
897 d_msg_peek (d_socket.U):
898 This variable conditionally defines the HAS_MSG_PEEK symbol,
899 which indicates that the MSG_PEEK is available. #ifdef is
900 not enough because it may be an enum, glibc has been known to do this.
902 d_msg_proxy (d_socket.U):
903 This variable conditionally defines the HAS_MSG_PROXY symbol,
904 which indicates that the MSG_PROXY is available. #ifdef is
905 not enough because it may be an enum, glibc has been known to do this.
907 d_msgctl (d_msgctl.U):
908 This variable conditionally defines the HAS_MSGCTL symbol, which
909 indicates to the C program that the msgctl() routine is available.
911 d_msgget (d_msgget.U):
912 This variable conditionally defines the HAS_MSGGET symbol, which
913 indicates to the C program that the msgget() routine is available.
915 d_msghdr_s (d_socket.U):
916 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
917 which indicates that the struct msghdr is supported.
919 d_msgrcv (d_msgrcv.U):
920 This variable conditionally defines the HAS_MSGRCV symbol, which
921 indicates to the C program that the msgrcv() routine is available.
923 d_msgsnd (d_msgsnd.U):
924 This variable conditionally defines the HAS_MSGSND symbol, which
925 indicates to the C program that the msgsnd() routine is available.
928 This variable conditionally defines HAS_MSYNC if msync() is
929 available to synchronize a mapped file.
931 d_munmap (d_munmap.U):
932 This variable conditionally defines HAS_MUNMAP if munmap() is
933 available to unmap a region mapped by mmap().
935 d_mymalloc (mallocsrc.U):
936 This variable conditionally defines MYMALLOC in case other parts
937 of the source want to take special action if MYMALLOC is used.
938 This may include different sorts of profiling or error detection.
941 This variable conditionally defines the HAS_NICE symbol, which
942 indicates to the C program that the nice() routine is available.
945 This symbol will be defined if the C compiler supports off64_t.
947 d_old_pthread_create_joinable (d_pthrattrj.U):
948 This variable conditionally defines pthread_create_joinable.
949 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
951 d_oldpthreads (usethreads.U):
952 This variable conditionally defines the OLD_PTHREADS_API symbol,
953 and indicates that Perl should be built to use the old
954 draft POSIX threads API. This is only potentially meaningful if
957 d_oldsock (d_socket.U):
958 This variable conditionally defines the OLDSOCKET symbol, which
959 indicates that the BSD socket interface is based on 4.1c and not 4.2.
962 This variable conditionally defines the HAS_OPEN3 manifest constant,
963 which indicates to the C program that the 3 argument version of
964 the open(2) function is available.
966 d_pathconf (d_pathconf.U):
967 This variable conditionally defines the HAS_PATHCONF symbol, which
968 indicates to the C program that the pathconf() routine is available
969 to determine file-system related limits and options associated
970 with a given filename.
973 This variable conditionally defines the HAS_PAUSE symbol, which
974 indicates to the C program that the pause() routine is available
975 to suspend a process until a signal is received.
977 d_phostname (d_gethname.U):
978 This variable conditionally defines the HAS_PHOSTNAME symbol, which
979 contains the shell command which, when fed to popen(), may be
980 used to derive the host name.
983 This variable conditionally defines the HAS_PIPE symbol, which
984 indicates to the C program that the pipe() routine is available
985 to create an inter-process channel.
988 This variable conditionally defines the HAS_POLL symbol, which
989 indicates to the C program that the poll() routine is available
990 to poll active file descriptors.
992 d_portable (d_portable.U):
993 This variable conditionally defines the PORTABLE symbol, which
994 indicates to the C program that it should not assume that it is
995 running on the machine it was compiled on.
997 d_PRId64 (quadfio.U):
998 This variable conditionally defines the PERL_PRId64 symbol, which
999 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1001 d_PRIeldbl (longdblfio.U):
1002 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1003 indiciates that stdio has a symbol to print long doubles.
1005 d_PRIEldbl (longdblfio.U):
1006 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1007 indiciates that stdio has a symbol to print long doubles.
1009 d_PRIfldbl (longdblfio.U):
1010 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1011 indiciates that stdio has a symbol to print long doubles.
1013 d_PRIFldbl (longdblfio.U):
1014 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1015 indiciates that stdio has a symbol to print long doubles.
1017 d_PRIgldbl (longdblfio.U):
1018 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1019 indiciates that stdio has a symbol to print long doubles.
1021 d_PRIGldbl (longdblfio.U):
1022 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1023 indiciates that stdio has a symbol to print long doubles.
1025 d_PRIi64 (quadfio.U):
1026 This variable conditionally defines the PERL_PRIi64 symbol, which
1027 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1029 d_PRIo64 (quadfio.U):
1030 This variable conditionally defines the PERL_PRIo64 symbol, which
1031 indiciates that stdio has a symbol to print 64-bit octal numbers.
1033 d_PRIu64 (quadfio.U):
1034 This variable conditionally defines the PERL_PRIu64 symbol, which
1035 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1038 d_PRIx64 (quadfio.U):
1039 This variable conditionally defines the PERL_PRIx64 symbol, which
1040 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1042 d_PRIX64 (quadfio.U):
1043 This variable conditionally defines the PERL_PRIX64 symbol, which
1044 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1046 d_pthread_yield (d_pthread_y.U):
1047 This variable conditionally defines the HAS_PTHREAD_YIELD
1048 symbol if the pthread_yield routine is available to yield
1049 the execution of the current thread.
1052 This variable conditionally defines PWAGE, which indicates
1053 that struct passwd contains pw_age.
1055 d_pwchange (i_pwd.U):
1056 This variable conditionally defines PWCHANGE, which indicates
1057 that struct passwd contains pw_change.
1059 d_pwclass (i_pwd.U):
1060 This variable conditionally defines PWCLASS, which indicates
1061 that struct passwd contains pw_class.
1063 d_pwcomment (i_pwd.U):
1064 This variable conditionally defines PWCOMMENT, which indicates
1065 that struct passwd contains pw_comment.
1067 d_pwexpire (i_pwd.U):
1068 This variable conditionally defines PWEXPIRE, which indicates
1069 that struct passwd contains pw_expire.
1071 d_pwgecos (i_pwd.U):
1072 This variable conditionally defines PWGECOS, which indicates
1073 that struct passwd contains pw_gecos.
1075 d_pwpasswd (i_pwd.U):
1076 This variable conditionally defines PWPASSWD, which indicates
1077 that struct passwd contains pw_passwd.
1079 d_pwquota (i_pwd.U):
1080 This variable conditionally defines PWQUOTA, which indicates
1081 that struct passwd contains pw_quota.
1083 d_readdir (d_readdir.U):
1084 This variable conditionally defines HAS_READDIR if readdir() is
1085 available to read directory entries.
1087 d_readlink (d_readlink.U):
1088 This variable conditionally defines the HAS_READLINK symbol, which
1089 indicates to the C program that the readlink() routine is available
1090 to read the value of a symbolic link.
1092 d_readv (d_readv.U):
1093 This variable conditionally defines the HAS_READV symbol, which
1094 indicates to the C program that the readv() routine is available.
1096 d_recvmsg (d_socket.U):
1097 This variable conditionally defines the HAS_RECVMSG symbol,
1098 which indicates that the recvmsg is supported.
1100 d_rename (d_rename.U):
1101 This variable conditionally defines the HAS_RENAME symbol, which
1102 indicates to the C program that the rename() routine is available
1105 d_rewinddir (d_readdir.U):
1106 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1109 d_rmdir (d_rmdir.U):
1110 This variable conditionally defines HAS_RMDIR if rmdir() is
1111 available to remove directories.
1113 d_safebcpy (d_safebcpy.U):
1114 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1115 the bcopy() routine can do overlapping copies.
1117 d_safemcpy (d_safemcpy.U):
1118 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1119 the memcpy() routine can do overlapping copies.
1121 d_sanemcmp (d_sanemcmp.U):
1122 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1123 the memcpy() routine is available and can be used to compare relative
1124 magnitudes of chars with their high bits set.
1126 d_sched_yield (d_pthread_y.U):
1127 This variable conditionally defines the HAS_SCHED_YIELD
1128 symbol if the sched_yield routine is available to yield
1129 the execution of the current thread.
1131 d_scm_rights (d_socket.U):
1132 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1133 which indicates that the SCM_RIGHTS is available. #ifdef is
1134 not enough because it may be an enum, glibc has been known to do this.
1136 d_seekdir (d_readdir.U):
1137 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1140 d_select (d_select.U):
1141 This variable conditionally defines HAS_SELECT if select() is
1142 available to select active file descriptors. A <sys/time.h>
1143 inclusion may be necessary for the timeout field.
1146 This variable conditionally defines the HAS_SEM symbol, which
1147 indicates that the entire sem*(2) library is present.
1149 d_semctl (d_semctl.U):
1150 This variable conditionally defines the HAS_SEMCTL symbol, which
1151 indicates to the C program that the semctl() routine is available.
1153 d_semctl_semid_ds (d_union_semun.U):
1154 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1155 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1157 d_semctl_semun (d_union_semun.U):
1158 This variable conditionally defines USE_SEMCTL_SEMUN, which
1159 indicates that union semun is to be used for semctl IPC_STAT.
1161 d_semget (d_semget.U):
1162 This variable conditionally defines the HAS_SEMGET symbol, which
1163 indicates to the C program that the semget() routine is available.
1165 d_semop (d_semop.U):
1166 This variable conditionally defines the HAS_SEMOP symbol, which
1167 indicates to the C program that the semop() routine is available.
1169 d_sendmsg (d_socket.U):
1170 This variable conditionally defines the HAS_SENDMSG symbol,
1171 which indicates that the sendmsg is supported.
1173 d_setegid (d_setegid.U):
1174 This variable conditionally defines the HAS_SETEGID symbol, which
1175 indicates to the C program that the setegid() routine is available
1176 to change the effective gid of the current program.
1178 d_seteuid (d_seteuid.U):
1179 This variable conditionally defines the HAS_SETEUID symbol, which
1180 indicates to the C program that the seteuid() routine is available
1181 to change the effective uid of the current program.
1183 d_setgrent (d_setgrent.U):
1184 This variable conditionally defines the HAS_SETGRENT symbol, which
1185 indicates to the C program that the setgrent() routine is available
1186 for initializing sequential access to the group database.
1188 d_setgrps (d_setgrps.U):
1189 This variable conditionally defines the HAS_SETGROUPS symbol, which
1190 indicates to the C program that the setgroups() routine is available
1191 to set the list of process groups.
1193 d_sethent (d_sethent.U):
1194 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1197 d_setlinebuf (d_setlnbuf.U):
1198 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1199 indicates to the C program that the setlinebuf() routine is available
1200 to change stderr or stdout from block-buffered or unbuffered to a
1203 d_setlocale (d_setlocale.U):
1204 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1205 available to handle locale-specific ctype implementations.
1207 d_setnent (d_setnent.U):
1208 This variable conditionally defines HAS_SETNETENT if setnetent() is
1211 d_setpent (d_setpent.U):
1212 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1215 d_setpgid (d_setpgid.U):
1216 This variable conditionally defines the HAS_SETPGID symbol if the
1217 setpgid(pid, gpid) function is available to set process group ID.
1219 d_setpgrp2 (d_setpgrp2.U):
1220 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1221 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1222 is available to set the current process group.
1224 d_setpgrp (d_setpgrp.U):
1225 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1226 available to set the current process group.
1228 d_setprior (d_setprior.U):
1229 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1230 is available to set a process's priority.
1232 d_setpwent (d_setpwent.U):
1233 This variable conditionally defines the HAS_SETPWENT symbol, which
1234 indicates to the C program that the setpwent() routine is available
1235 for initializing sequential access to the passwd database.
1237 d_setregid (d_setregid.U):
1238 This variable conditionally defines HAS_SETREGID if setregid() is
1239 available to change the real and effective gid of the current
1242 d_setresgid (d_setregid.U):
1243 This variable conditionally defines HAS_SETRESGID if setresgid() is
1244 available to change the real, effective and saved gid of the current
1247 d_setresuid (d_setreuid.U):
1248 This variable conditionally defines HAS_SETREUID if setresuid() is
1249 available to change the real, effective and saved uid of the current
1252 d_setreuid (d_setreuid.U):
1253 This variable conditionally defines HAS_SETREUID if setreuid() is
1254 available to change the real and effective uid of the current
1257 d_setrgid (d_setrgid.U):
1258 This variable conditionally defines the HAS_SETRGID symbol, which
1259 indicates to the C program that the setrgid() routine is available
1260 to change the real gid of the current program.
1262 d_setruid (d_setruid.U):
1263 This variable conditionally defines the HAS_SETRUID symbol, which
1264 indicates to the C program that the setruid() routine is available
1265 to change the real uid of the current program.
1267 d_setsent (d_setsent.U):
1268 This variable conditionally defines HAS_SETSERVENT if setservent() is
1271 d_setsid (d_setsid.U):
1272 This variable conditionally defines HAS_SETSID if setsid() is
1273 available to set the process group ID.
1275 d_setspent (d_setspent.U):
1276 This variable conditionally defines HAS_SETSPENT if setspent() is
1277 available to initialize the scan of SysV shadow password entries.
1279 d_setvbuf (d_setvbuf.U):
1280 This variable conditionally defines the HAS_SETVBUF symbol, which
1281 indicates to the C program that the setvbuf() routine is available
1282 to change buffering on an open stdio stream.
1285 This variable conditionally defines the USE_SFIO symbol,
1286 and indicates whether sfio is available (and should be used).
1289 This variable conditionally defines the HAS_SHM symbol, which
1290 indicates that the entire shm*(2) library is present.
1292 d_shmat (d_shmat.U):
1293 This variable conditionally defines the HAS_SHMAT symbol, which
1294 indicates to the C program that the shmat() routine is available.
1296 d_shmatprototype (d_shmat.U):
1297 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1298 symbol, which indicates that sys/shm.h has a prototype for
1301 d_shmctl (d_shmctl.U):
1302 This variable conditionally defines the HAS_SHMCTL symbol, which
1303 indicates to the C program that the shmctl() routine is available.
1305 d_shmdt (d_shmdt.U):
1306 This variable conditionally defines the HAS_SHMDT symbol, which
1307 indicates to the C program that the shmdt() routine is available.
1309 d_shmget (d_shmget.U):
1310 This variable conditionally defines the HAS_SHMGET symbol, which
1311 indicates to the C program that the shmget() routine is available.
1313 d_sigaction (d_sigaction.U):
1314 This variable conditionally defines the HAS_SIGACTION symbol, which
1315 indicates that the Vr4 sigaction() routine is available.
1317 d_sigsetjmp (d_sigsetjmp.U):
1318 This variable conditionally defines the HAS_SIGSETJMP symbol,
1319 which indicates that the sigsetjmp() routine is available to
1320 call setjmp() and optionally save the process's signal mask.
1322 d_socket (d_socket.U):
1323 This variable conditionally defines HAS_SOCKET, which indicates
1324 that the BSD socket interface is supported.
1326 d_sockpair (d_socket.U):
1327 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1328 indicates that the BSD socketpair() is supported.
1330 d_sqrtl (d_sqrtl.U):
1331 This variable conditionally defines the HAS_SQRTL symbol, which
1332 indicates to the C program that the sqrtl() routine is available.
1334 d_statblks (d_statblks.U):
1335 This variable conditionally defines USE_STAT_BLOCKS
1336 if this system has a stat structure declaring
1337 st_blksize and st_blocks.
1339 d_statfs_f_flags (d_statfs_f_flags.U):
1340 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1341 symbol, which indicates to struct statfs from has f_flags member.
1342 This kind of struct statfs is coming from sys/mount.h (BSD),
1343 not from sys/statfs.h (SYSV).
1345 d_statfs_s (d_statfs_s.U):
1346 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1347 which indicates that the struct statfs is supported.
1349 d_statvfs (d_statvfs.U):
1350 This variable conditionally defines the HAS_STATVFS symbol, which
1351 indicates to the C program that the statvfs() routine is available.
1353 d_stdio_cnt_lval (d_stdstdio.U):
1354 This variable conditionally defines STDIO_CNT_LVALUE if the
1355 FILE_cnt macro can be used as an lvalue.
1357 d_stdio_ptr_lval (d_stdstdio.U):
1358 This variable conditionally defines STDIO_PTR_LVALUE if the
1359 FILE_ptr macro can be used as an lvalue.
1361 d_stdio_stream_array (stdio_streams.U):
1362 This variable tells whether there is an array holding
1365 d_stdiobase (d_stdstdio.U):
1366 This variable conditionally defines USE_STDIO_BASE if this system
1367 has a FILE structure declaring a usable _base field (or equivalent)
1370 d_stdstdio (d_stdstdio.U):
1371 This variable conditionally defines USE_STDIO_PTR if this system
1372 has a FILE structure declaring usable _ptr and _cnt fields (or
1373 equivalent) in stdio.h.
1375 d_strchr (d_strchr.U):
1376 This variable conditionally defines HAS_STRCHR if strchr() and
1377 strrchr() are available for string searching.
1379 d_strcoll (d_strcoll.U):
1380 This variable conditionally defines HAS_STRCOLL if strcoll() is
1381 available to compare strings using collating information.
1383 d_strctcpy (d_strctcpy.U):
1384 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1385 indicates to the C program that this C compiler knows how to copy
1388 d_strerrm (d_strerror.U):
1389 This variable holds what Strerrr is defined as to translate an error
1390 code condition into an error message string. It could be 'strerror'
1391 or a more complex macro emulating strrror with sys_errlist[], or the
1392 "unknown" string when both strerror and sys_errlist are missing.
1394 d_strerror (d_strerror.U):
1395 This variable conditionally defines HAS_STRERROR if strerror() is
1396 available to translate error numbers to strings.
1398 d_strtod (d_strtod.U):
1399 This variable conditionally defines the HAS_STRTOD symbol, which
1400 indicates to the C program that the strtod() routine is available
1401 to provide better numeric string conversion than atof().
1403 d_strtol (d_strtol.U):
1404 This variable conditionally defines the HAS_STRTOL symbol, which
1405 indicates to the C program that the strtol() routine is available
1406 to provide better numeric string conversion than atoi() and friends.
1408 d_strtoul (d_strtoul.U):
1409 This variable conditionally defines the HAS_STRTOUL symbol, which
1410 indicates to the C program that the strtoul() routine is available
1411 to provide conversion of strings to unsigned long.
1413 d_strtoull (strtoull.U):
1414 This variable conditionally defines the HAS_STRTOULL symbol, which
1415 indicates to the C program that the strtoull() routine is available.
1417 d_strxfrm (d_strxfrm.U):
1418 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1419 available to transform strings.
1421 d_suidsafe (d_dosuid.U):
1422 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1423 if setuid scripts can be secure. This test looks in /dev/fd/.
1425 d_symlink (d_symlink.U):
1426 This variable conditionally defines the HAS_SYMLINK symbol, which
1427 indicates to the C program that the symlink() routine is available
1428 to create symbolic links.
1430 d_syscall (d_syscall.U):
1431 This variable conditionally defines HAS_SYSCALL if syscall() is
1432 available call arbitrary system calls.
1434 d_sysconf (d_sysconf.U):
1435 This variable conditionally defines the HAS_SYSCONF symbol, which
1436 indicates to the C program that the sysconf() routine is available
1437 to determine system related limits and options.
1439 d_sysernlst (d_strerror.U):
1440 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1441 is available to translate error numbers to the symbolic name.
1443 d_syserrlst (d_strerror.U):
1444 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1445 available to translate error numbers to strings.
1447 d_system (d_system.U):
1448 This variable conditionally defines HAS_SYSTEM if system() is
1449 available to issue a shell command.
1451 d_tcgetpgrp (d_tcgtpgrp.U):
1452 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1453 indicates to the C program that the tcgetpgrp() routine is available.
1454 to get foreground process group ID.
1456 d_tcsetpgrp (d_tcstpgrp.U):
1457 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1458 indicates to the C program that the tcsetpgrp() routine is available
1459 to set foreground process group ID.
1461 d_telldir (d_readdir.U):
1462 This variable conditionally defines HAS_TELLDIR if telldir() is
1465 d_telldirproto (d_telldirproto.U):
1466 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1467 which indicates to the C program that the system provides
1468 a prototype for the telldir() function. Otherwise, it is
1469 up to the program to supply one.
1472 This variable conditionally defines the HAS_TIME symbol, which indicates
1473 that the time() routine exists. The time() routine is normaly
1474 provided on UNIX systems.
1476 d_times (d_times.U):
1477 This variable conditionally defines the HAS_TIMES symbol, which indicates
1478 that the times() routine exists. The times() routine is normaly
1479 provided on UNIX systems. You may have to include <sys/times.h>.
1481 d_truncate (d_truncate.U):
1482 This variable conditionally defines HAS_TRUNCATE if truncate() is
1483 available to truncate files.
1485 d_tzname (d_tzname.U):
1486 This variable conditionally defines HAS_TZNAME if tzname[] is
1487 available to access timezone names.
1489 d_umask (d_umask.U):
1490 This variable conditionally defines the HAS_UMASK symbol, which
1491 indicates to the C program that the umask() routine is available.
1492 to set and get the value of the file creation mask.
1494 d_uname (d_gethname.U):
1495 This variable conditionally defines the HAS_UNAME symbol, which
1496 indicates to the C program that the uname() routine may be
1497 used to derive the host name.
1499 d_union_semun (d_union_semun.U):
1500 This variable conditionally defines HAS_UNION_SEMUN if the
1501 union semun is defined by including <sys/sem.h>.
1503 d_ustat (d_ustat.U):
1504 This variable conditionally defines HAS_USTAT if ustat() is
1505 available to query file system statistics by dev_t.
1507 d_vendorbin (vendorbin.U):
1508 This variable conditionally defines PERL_VENDORBIN.
1510 d_vendorlib (vendorlib.U):
1511 This variable conditionally defines PERL_VENDORLIB.
1513 d_vfork (d_vfork.U):
1514 This variable conditionally defines the HAS_VFORK symbol, which
1515 indicates the vfork() routine is available.
1517 d_void_closedir (d_closedir.U):
1518 This variable conditionally defines VOID_CLOSEDIR if closedir()
1519 does not return a value.
1521 d_voidsig (d_voidsig.U):
1522 This variable conditionally defines VOIDSIG if this system
1523 declares "void (*signal(...))()" in signal.h. The old way was to
1524 declare it as "int (*signal(...))()".
1526 d_voidtty (i_sysioctl.U):
1527 This variable conditionally defines USE_IOCNOTTY to indicate that the
1528 ioctl() call with TIOCNOTTY should be used to void tty association.
1529 Otherwise (on USG probably), it is enough to close the standard file
1530 decriptors and do a setpgrp().
1532 d_volatile (d_volatile.U):
1533 This variable conditionally defines the HASVOLATILE symbol, which
1534 indicates to the C program that this C compiler knows about the
1535 volatile declaration.
1537 d_vprintf (d_vprintf.U):
1538 This variable conditionally defines the HAS_VPRINTF symbol, which
1539 indicates to the C program that the vprintf() routine is available
1540 to printf with a pointer to an argument list.
1542 d_wait4 (d_wait4.U):
1543 This variable conditionally defines the HAS_WAIT4 symbol, which
1544 indicates the wait4() routine is available.
1546 d_waitpid (d_waitpid.U):
1547 This variable conditionally defines HAS_WAITPID if waitpid() is
1548 available to wait for child process.
1550 d_wcstombs (d_wcstombs.U):
1551 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1552 indicates to the C program that the wcstombs() routine is available
1553 to convert wide character strings to multibyte strings.
1555 d_wctomb (d_wctomb.U):
1556 This variable conditionally defines the HAS_WCTOMB symbol, which
1557 indicates to the C program that the wctomb() routine is available
1558 to convert a wide character to a multibyte.
1560 d_writev (d_writev.U):
1561 This variable conditionally defines the HAS_WRITEV symbol, which
1562 indicates to the C program that the writev() routine is available.
1565 This variable conditionally defines the symbol XENIX, which alerts
1566 the C program that it runs under Xenix.
1569 This variable is used internally by Configure to determine the
1570 full pathname (if any) of the date program. After Configure runs,
1571 the value is reset to a plain "date" and is not useful.
1573 db_hashtype (i_db.U):
1574 This variable contains the type of the hash structure element
1575 in the <db.h> header file. In older versions of DB, it was
1576 int, while in newer ones it is u_int32_t.
1578 db_prefixtype (i_db.U):
1579 This variable contains the type of the prefix structure element
1580 in the <db.h> header file. In older versions of DB, it was
1581 int, while in newer ones it is size_t.
1583 defvoidused (voidflags.U):
1584 This variable contains the default value of the VOIDUSED symbol (15).
1586 direntrytype (i_dirent.U):
1587 This symbol is set to 'struct direct' or 'struct dirent' depending on
1588 whether dirent is available or not. You should use this pseudo type to
1589 portably declare your directory entries.
1592 This variable contains the extension that is to be used for the
1593 dynamically loaded modules that perl generaties.
1596 This variable contains the name of the dynamic loading file that
1597 will be used with the package.
1599 doublesize (doublesize.U):
1600 This variable contains the value of the DOUBLESIZE symbol, which
1601 indicates to the C program how many bytes there are in a double.
1603 drand01 (randfunc.U):
1604 Indicates the macro to be used to generate normalized
1605 random numbers. Uses randfunc, often divided by
1606 (double) (((unsigned long) 1 << randbits)) in order to
1607 normalize the result.
1608 In C programs, the macro 'Drand01' is mapped to drand01.
1610 dynamic_ext (Extensions.U):
1611 This variable holds a list of XS extension files we want to
1612 link dynamically into the package. It is used by Makefile.
1614 eagain (nblock_io.U):
1615 This variable bears the symbolic errno code set by read() when no
1616 data is present on the file and non-blocking I/O was enabled (otherwise,
1617 read() blocks naturally).
1620 This variable conditionally defines EBCDIC if this
1621 system uses EBCDIC encoding. Among other things, this
1622 means that the character ranges are not contiguous.
1626 This variable is used internally by Configure to determine the
1627 full pathname (if any) of the echo program. After Configure runs,
1628 the value is reset to a plain "echo" and is not useful.
1631 This variable is used internally by Configure to determine the
1632 full pathname (if any) of the egrep program. After Configure runs,
1633 the value is reset to a plain "egrep" and is not useful.
1636 This variable is defined but not used by Configure.
1637 The value is a plain '' and is not useful.
1640 When running under Eunice this variable contains a command which will
1641 convert a shell script to the proper form of text file for it to be
1642 executable by the shell. On other systems it is a no-op.
1645 This is an old synonym for _exe.
1648 This variable is used internally by Configure to determine the
1649 full pathname (if any) of the expr program. After Configure runs,
1650 the value is reset to a plain "expr" and is not useful.
1652 extensions (Extensions.U):
1653 This variable holds a list of all extension files (both XS and
1654 non-xs linked into the package. It is propagated to Config.pm
1655 and is typically used to test whether a particular extesion
1658 fflushall (fflushall.U):
1659 This symbol, if defined, tells that to flush
1660 all pending stdio output one must loop through all
1661 the stdio file handles stored in an array and fflush them.
1662 Note that if fflushNULL is defined, fflushall will not
1663 even be probed for and will be left undefined.
1665 fflushNULL (fflushall.U):
1666 This symbol, if defined, tells that fflush(NULL) does flush
1667 all pending stdio output.
1670 This variable is defined but not used by Configure.
1671 The value is a plain '' and is not useful.
1673 firstmakefile (Unix.U):
1674 This variable defines the first file searched by make. On unix,
1675 it is makefile (then Makefile). On case-insensitive systems,
1676 it might be something else. This is only used to deal with
1677 convoluted make depend tricks.
1680 This variable is defined but not used by Configure.
1681 The value is a plain '' and is not useful.
1683 fpostype (fpostype.U):
1684 This variable defines Fpos_t to be something like fpost_t, long,
1685 uint, or whatever type is used to declare file positions in libc.
1687 freetype (mallocsrc.U):
1688 This variable contains the return type of free(). It is usually
1689 void, but occasionally int.
1692 This variable contains the full pathname to 'ar', whether or
1693 not the user has specified 'portability'. This is only used
1697 This variable contains the full pathname to 'csh', whether or
1698 not the user has specified 'portability'. This is only used
1699 in the compiled C program, and we assume that all systems which
1700 can share this executable will have the same full pathname to
1703 full_sed (Loc_sed.U):
1704 This variable contains the full pathname to 'sed', whether or
1705 not the user has specified 'portability'. This is only used
1706 in the compiled C program, and we assume that all systems which
1707 can share this executable will have the same full pathname to
1711 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1712 indicate whether the compiler is version 1 or 2. This is used in
1713 setting some of the default cflags. It is set to '' if not gcc.
1715 gidtype (gidtype.U):
1716 This variable defines Gid_t to be something like gid_t, int,
1717 ushort, or whatever type is used to declare the return type
1718 of getgid(). Typically, it is the type of group ids in the kernel.
1721 This variable holds the general path (space-separated) used to
1722 find libraries. It may contain directories that do not exist on
1723 this platform, libpth is the cleaned-up version.
1726 This variable is used internally by Configure to determine the
1727 full pathname (if any) of the grep program. After Configure runs,
1728 the value is reset to a plain "grep" and is not useful.
1731 This variable contains a command that produces the text of the
1732 /etc/group file. This is normally "cat /etc/group", but can be
1733 "ypcat group" when NIS is used.
1735 groupstype (groupstype.U):
1736 This variable defines Groups_t to be something like gid_t, int,
1737 ushort, or whatever type is used for the second argument to
1738 getgroups() and setgroups(). Usually, this is the same as
1739 gidtype (gid_t), but sometimes it isn't.
1742 This variable is used internally by Configure to determine the
1743 full pathname (if any) of the gzip program. After Configure runs,
1744 the value is reset to a plain "gzip" and is not useful.
1746 h_fcntl (h_fcntl.U):
1747 This is variable gets set in various places to tell i_fcntl that
1748 <fcntl.h> should be included.
1750 h_sysfile (h_sysfile.U):
1751 This is variable gets set in various places to tell i_sys_file that
1752 <sys/file.h> should be included.
1755 Gives the type of hints used for previous answers. May be one of
1756 "default", "recommended" or "previous".
1759 This variable contains a command that produces the text of the
1760 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1761 "ypcat hosts" when NIS is used.
1764 This variable contains a flag which will tell the C compiler and loader
1765 to produce a program running with a huge memory model. If the
1766 huge model is not supported, contains the flag to produce large
1767 model programs. It is up to the Makefile to use this.
1769 i_arpainet (i_arpainet.U):
1770 This variable conditionally defines the I_ARPA_INET symbol,
1771 and indicates whether a C program should include <arpa/inet.h>.
1773 i_bsdioctl (i_sysioctl.U):
1774 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1775 indicates to the C program that <sys/bsdioctl.h> exists and should
1779 This variable conditionally defines the I_DB symbol, and indicates
1780 whether a C program may include Berkeley's DB include file <db.h>.
1783 This variable conditionally defines the I_DBM symbol, which
1784 indicates to the C program that <dbm.h> exists and should
1787 i_dirent (i_dirent.U):
1788 This variable conditionally defines I_DIRENT, which indicates
1789 to the C program that it should include <dirent.h>.
1792 This variable conditionally defines the I_DLD symbol, which
1793 indicates to the C program that <dld.h> (GNU dynamic loading)
1794 exists and should be included.
1796 i_dlfcn (i_dlfcn.U):
1797 This variable conditionally defines the I_DLFCN symbol, which
1798 indicates to the C program that <dlfcn.h> exists and should
1801 i_fcntl (i_fcntl.U):
1802 This variable controls the value of I_FCNTL (which tells
1803 the C program to include <fcntl.h>).
1805 i_float (i_float.U):
1806 This variable conditionally defines the I_FLOAT symbol, and indicates
1807 whether a C program may include <float.h> to get symbols like DBL_MAX
1808 or DBL_MIN, i.e. machine dependent floating point values.
1811 This variable conditionally defines the I_GDBM symbol, which
1812 indicates to the C program that <gdbm.h> exists and should
1816 This variable conditionally defines the I_GRP symbol, and indicates
1817 whether a C program should include <grp.h>.
1819 i_inttypes (i_inttypes.U):
1820 This variable conditionally defines the I_INTTYPES symbol,
1821 and indicates whether a C program should include <inttypes.h>.
1823 i_limits (i_limits.U):
1824 This variable conditionally defines the I_LIMITS symbol, and indicates
1825 whether a C program may include <limits.h> to get symbols like WORD_BIT
1828 i_locale (i_locale.U):
1829 This variable conditionally defines the I_LOCALE symbol,
1830 and indicates whether a C program should include <locale.h>.
1832 i_machcthr (i_machcthr.U):
1833 This variable conditionally defines the I_MACH_CTHREADS symbol,
1834 and indicates whether a C program should include <mach/cthreads.h>.
1836 i_malloc (i_malloc.U):
1837 This variable conditionally defines the I_MALLOC symbol, and indicates
1838 whether a C program should include <malloc.h>.
1841 This variable conditionally defines the I_MATH symbol, and indicates
1842 whether a C program may include <math.h>.
1844 i_memory (i_memory.U):
1845 This variable conditionally defines the I_MEMORY symbol, and indicates
1846 whether a C program should include <memory.h>.
1848 i_mntent (i_mntent.U):
1849 This variable conditionally defines the I_MNTENT symbol, and indicates
1850 whether a C program should include <mntent.h>.
1853 This variable conditionally defines the I_NDBM symbol, which
1854 indicates to the C program that <ndbm.h> exists and should
1857 i_netdb (i_netdb.U):
1858 This variable conditionally defines the I_NETDB symbol, and indicates
1859 whether a C program should include <netdb.h>.
1861 i_neterrno (i_neterrno.U):
1862 This variable conditionally defines the I_NET_ERRNO symbol, which
1863 indicates to the C program that <net/errno.h> exists and should
1866 i_netinettcp (i_netinettcp.U):
1867 This variable conditionally defines the I_NETINET_TCP symbol,
1868 and indicates whether a C program should include <netinet/tcp.h>.
1871 This variable conditionally defines I_NETINET_IN, which indicates
1872 to the C program that it should include <netinet/in.h>. Otherwise,
1873 you may try <sys/in.h>.
1876 This variable conditionally defines the I_POLL symbol, and indicates
1877 whether a C program should include <poll.h>.
1879 i_pthread (i_pthread.U):
1880 This variable conditionally defines the I_PTHREAD symbol,
1881 and indicates whether a C program should include <pthread.h>.
1884 This variable conditionally defines I_PWD, which indicates
1885 to the C program that it should include <pwd.h>.
1887 i_rpcsvcdbm (i_dbm.U):
1888 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1889 indicates to the C program that <rpcsvc/dbm.h> exists and should
1890 be included. Some System V systems might need this instead of <dbm.h>.
1893 This variable conditionally defines the I_SFIO symbol,
1894 and indicates whether a C program should include <sfio.h>.
1896 i_sgtty (i_termio.U):
1897 This variable conditionally defines the I_SGTTY symbol, which
1898 indicates to the C program that it should include <sgtty.h> rather
1901 i_shadow (i_shadow.U):
1902 This variable conditionally defines the I_SHADOW symbol, and indicates
1903 whether a C program should include <shadow.h>.
1905 i_socks (i_socks.U):
1906 This variable conditionally defines the I_SOCKS symbol, and indicates
1907 whether a C program should include <socks.h>.
1909 i_stdarg (i_varhdr.U):
1910 This variable conditionally defines the I_STDARG symbol, which
1911 indicates to the C program that <stdarg.h> exists and should
1914 i_stddef (i_stddef.U):
1915 This variable conditionally defines the I_STDDEF symbol, which
1916 indicates to the C program that <stddef.h> exists and should
1919 i_stdlib (i_stdlib.U):
1920 This variable conditionally defines the I_STDLIB symbol, which
1921 indicates to the C program that <stdlib.h> exists and should
1924 i_string (i_string.U):
1925 This variable conditionally defines the I_STRING symbol, which
1926 indicates that <string.h> should be included rather than <strings.h>.
1928 i_sysaccess (i_sysaccess.U):
1929 This variable conditionally defines the I_SYS_ACCESS symbol,
1930 and indicates whether a C program should include <sys/access.h>.
1932 i_sysdir (i_sysdir.U):
1933 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1934 whether a C program should include <sys/dir.h>.
1936 i_sysfile (i_sysfile.U):
1937 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1938 whether a C program should include <sys/file.h> to get R_OK and friends.
1940 i_sysfilio (i_sysioctl.U):
1941 This variable conditionally defines the I_SYS_FILIO symbol, which
1942 indicates to the C program that <sys/filio.h> exists and should
1943 be included in preference to <sys/ioctl.h>.
1946 This variable conditionally defines I_SYS_IN, which indicates
1947 to the C program that it should include <sys/in.h> instead of
1950 i_sysioctl (i_sysioctl.U):
1951 This variable conditionally defines the I_SYS_IOCTL symbol, which
1952 indicates to the C program that <sys/ioctl.h> exists and should
1955 i_sysmman (i_sysmman.U):
1956 This variable conditionally defines the I_SYS_MMAN symbol, and
1957 indicates whether a C program should include <sys/mman.h>.
1959 i_sysmount (i_sysmount.U):
1960 This variable conditionally defines the I_SYSMOUNT symbol,
1961 and indicates whether a C program should include <sys/mount.h>.
1963 i_sysndir (i_sysndir.U):
1964 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1965 whether a C program should include <sys/ndir.h>.
1967 i_sysparam (i_sysparam.U):
1968 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1969 whether a C program should include <sys/param.h>.
1971 i_sysresrc (i_sysresrc.U):
1972 This variable conditionally defines the I_SYS_RESOURCE symbol,
1973 and indicates whether a C program should include <sys/resource.h>.
1975 i_syssecrt (i_syssecrt.U):
1976 This variable conditionally defines the I_SYS_SECURITY symbol,
1977 and indicates whether a C program should include <sys/security.h>.
1979 i_sysselct (i_sysselct.U):
1980 This variable conditionally defines I_SYS_SELECT, which indicates
1981 to the C program that it should include <sys/select.h> in order to
1982 get the definition of struct timeval.
1984 i_syssockio (i_sysioctl.U):
1985 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1986 C program that socket ioctl codes may be found in <sys/sockio.h>
1987 instead of <sys/ioctl.h>.
1989 i_sysstat (i_sysstat.U):
1990 This variable conditionally defines the I_SYS_STAT symbol,
1991 and indicates whether a C program should include <sys/stat.h>.
1993 i_sysstatfs (i_sysstatfs.U):
1994 This variable conditionally defines the I_SYSSTATFS symbol,
1995 and indicates whether a C program should include <sys/statfs.h>.
1997 i_sysstatvfs (i_sysstatvfs.U):
1998 This variable conditionally defines the I_SYSSTATVFS symbol,
1999 and indicates whether a C program should include <sys/statvfs.h>.
2001 i_systime (i_time.U):
2002 This variable conditionally defines I_SYS_TIME, which indicates
2003 to the C program that it should include <sys/time.h>.
2005 i_systimek (i_time.U):
2006 This variable conditionally defines I_SYS_TIME_KERNEL, which
2007 indicates to the C program that it should include <sys/time.h>
2008 with KERNEL defined.
2010 i_systimes (i_systimes.U):
2011 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2012 whether a C program should include <sys/times.h>.
2014 i_systypes (i_systypes.U):
2015 This variable conditionally defines the I_SYS_TYPES symbol,
2016 and indicates whether a C program should include <sys/types.h>.
2018 i_sysuio (i_sysuio.U):
2019 This variable conditionally defines the I_SYSUIO symbol, and indicates
2020 whether a C program should include <sys/uio.h>.
2022 i_sysun (i_sysun.U):
2023 This variable conditionally defines I_SYS_UN, which indicates
2024 to the C program that it should include <sys/un.h> to get UNIX
2025 domain socket definitions.
2027 i_sysvfs (i_sysvfs.U):
2028 This variable conditionally defines the I_SYSVFS symbol,
2029 and indicates whether a C program should include <sys/vfs.h>.
2031 i_syswait (i_syswait.U):
2032 This variable conditionally defines I_SYS_WAIT, which indicates
2033 to the C program that it should include <sys/wait.h>.
2035 i_termio (i_termio.U):
2036 This variable conditionally defines the I_TERMIO symbol, which
2037 indicates to the C program that it should include <termio.h> rather
2040 i_termios (i_termio.U):
2041 This variable conditionally defines the I_TERMIOS symbol, which
2042 indicates to the C program that the POSIX <termios.h> file is
2046 This variable conditionally defines I_TIME, which indicates
2047 to the C program that it should include <time.h>.
2049 i_unistd (i_unistd.U):
2050 This variable conditionally defines the I_UNISTD symbol, and indicates
2051 whether a C program should include <unistd.h>.
2053 i_ustat (i_ustat.U):
2054 This variable conditionally defines the I_USTAT symbol, and indicates
2055 whether a C program should include <ustat.h>.
2057 i_utime (i_utime.U):
2058 This variable conditionally defines the I_UTIME symbol, and indicates
2059 whether a C program should include <utime.h>.
2061 i_values (i_values.U):
2062 This variable conditionally defines the I_VALUES symbol, and indicates
2063 whether a C program may include <values.h> to get symbols like MAXLONG
2066 i_varargs (i_varhdr.U):
2067 This variable conditionally defines I_VARARGS, which indicates
2068 to the C program that it should include <varargs.h>.
2070 i_varhdr (i_varhdr.U):
2071 Contains the name of the header to be included to get va_dcl definition.
2072 Typically one of varargs.h or stdarg.h.
2074 i_vfork (i_vfork.U):
2075 This variable conditionally defines the I_VFORK symbol, and indicates
2076 whether a C program should include vfork.h.
2078 ignore_versioned_solibs (libs.U):
2079 This variable should be non-empty if non-versioned shared
2080 libraries (libfoo.so.x.y) are to be ignored (because they
2081 cannot be linked against).
2084 This variable must preceed the normal include path to get hte
2085 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2086 Value can be "" or "/bsd43" on mips.
2089 This variable is defined but not used by Configure.
2090 The value is a plain '' and is not useful.
2092 installarchlib (archlib.U):
2093 This variable is really the same as archlibexp but may differ on
2094 those systems using AFS. For extra portability, only this variable
2095 should be used in makefiles.
2098 This variable is the same as binexp unless AFS is running in which case
2099 the user is explicitely prompted for it. This variable should always
2100 be used in your makefiles for maximum portability.
2102 installman1dir (man1dir.U):
2103 This variable is really the same as man1direxp, unless you are using
2104 AFS in which case it points to the read/write location whereas
2105 man1direxp only points to the read-only access location. For extra
2106 portability, you should only use this variable within your makefiles.
2108 installman3dir (man3dir.U):
2109 This variable is really the same as man3direxp, unless you are using
2110 AFS in which case it points to the read/write location whereas
2111 man3direxp only points to the read-only access location. For extra
2112 portability, you should only use this variable within your makefiles.
2114 installprefix (installprefix.U):
2115 This variable holds the name of the directory below which
2116 "make install" will install the package. For most users, this
2117 is the same as prefix. However, it is useful for
2118 installing the software into a different (usually temporary)
2119 location after which it can be bundled up and moved somehow
2120 to the final location specified by prefix.
2122 installprefixexp (installprefix.U):
2123 This variable holds the full absolute path of installprefix
2124 with all ~-expansion done.
2126 installprivlib (privlib.U):
2127 This variable is really the same as privlibexp but may differ on
2128 those systems using AFS. For extra portability, only this variable
2129 should be used in makefiles.
2131 installscript (scriptdir.U):
2132 This variable is usually the same as scriptdirexp, unless you are on
2133 a system running AFS, in which case they may differ slightly. You
2134 should always use this variable within your makefiles for portability.
2136 installsitearch (sitearch.U):
2137 This variable is really the same as sitearchexp but may differ on
2138 those systems using AFS. For extra portability, only this variable
2139 should be used in makefiles.
2141 installsitebin (sitebin.U):
2142 This variable is usually the same as sitebinexp, unless you are on
2143 a system running AFS, in which case they may differ slightly. You
2144 should always use this variable within your makefiles for portability.
2146 installsitelib (sitelib.U):
2147 This variable is really the same as sitelibexp but may differ on
2148 those systems using AFS. For extra portability, only this variable
2149 should be used in makefiles.
2151 installstyle (installstyle.U):
2152 This variable describes the "style" of the perl installation.
2153 This is intended to be useful for tools that need to
2154 manipulate entire perl distributions. Perl itself doesn't use
2155 this to find its libraries -- the library directories are
2156 stored directly in Config.pm. Currently, there are only two
2157 styles: "lib" and "lib/perl5". The default library locations
2158 (e.g. privlib, sitelib) are either $prefix/lib or
2159 $prefix/lib/perl5. The former is useful if $prefix is a
2160 directory dedicated to perl (e.g. /opt/perl), while the latter
2161 is useful if $prefix is shared by many packages, e.g. if
2163 This may later be extended to include other information, so
2164 be careful with pattern-matching on the results.
2165 For compatibility with perl5.005 and earlier, the default
2166 setting is based on whether or not $prefix contains the string
2169 installusrbinperl (instubperl.U):
2170 This variable tells whether Perl should be installed also as
2171 /usr/bin/perl in addition to
2174 installvendorbin (vendorbin.U):
2175 This variable is really the same as vendorbinexp but may differ on
2176 those systems using AFS. For extra portability, only this variable
2177 should be used in makefiles.
2179 installvendorlib (vendorlib.U):
2180 This variable is really the same as vendorlibexp but may differ on
2181 those systems using AFS. For extra portability, only this variable
2182 should be used in makefiles.
2184 intsize (intsize.U):
2185 This variable contains the value of the INTSIZE symbol, which
2186 indicates to the C program how many bytes there are in an int.
2188 known_extensions (Extensions.U):
2189 This variable holds a list of all XS extensions included in
2193 This variable is defined but not used by Configure.
2194 The value is a plain '' and is not useful.
2197 This variable contains a flag which will tell the C compiler and loader
2198 to produce a program running with a large memory model. It is up to
2199 the Makefile to use this.
2202 This variable indicates the program to be used to link
2203 libraries for dynamic loading. On some systems, it is 'ld'.
2204 On ELF systems, it should be $cc. Mostly, we'll try to respect
2205 the hint file setting.
2207 lddlflags (dlsrc.U):
2208 This variable contains any special flags that might need to be
2209 passed to $ld to create a shared library suitable for dynamic
2210 loading. It is up to the makefile to use it. For hpux, it
2211 should be '-b'. For sunos 4.1, it is empty.
2213 ldflags (ccflags.U):
2214 This variable contains any additional C loader flags desired by
2215 the user. It is up to the Makefile to use this.
2217 ldlibpthname (libperl.U):
2218 This variable holds the name of the shared library
2219 search path, often LD_LIBRARY_PATH. To get an empty
2220 string, the hints file must set this to 'none'.
2223 This variable is used internally by Configure to determine the
2224 full pathname (if any) of the less program. After Configure runs,
2225 the value is reset to a plain "less" and is not useful.
2228 This is an old synonym for _a.
2231 This variable contains the location of the C library.
2233 libperl (libperl.U):
2234 The perl executable is obtained by linking perlmain.c with
2235 libperl, any static extensions (usually just DynaLoader),
2236 and any other libraries needed on this system. libperl
2237 is usually libperl.a, but can also be libperl.so.xxx if
2238 the user wishes to build a perl executable with a shared
2242 This variable holds the general path (space-separated) used to find
2243 libraries. It is intended to be used by other units.
2246 This variable holds the additional libraries we want to use.
2247 It is up to the Makefile to deal with it.
2249 libswanted (Myinit.U):
2250 This variable holds a list of all the libraries we want to
2251 search. The order is chosen to pick up the c library
2252 ahead of ucb or bsd libraries for SVR4.
2255 This variable is defined but not used by Configure.
2256 The value is a plain '' and is not useful.
2259 This variable is defined but not used by Configure.
2260 The value is a plain '' and is not useful.
2262 lkflags (ccflags.U):
2263 This variable contains any additional C partial linker flags desired by
2264 the user. It is up to the Makefile to use this.
2267 This variable is used internally by Configure to determine the
2268 full pathname (if any) of the ln program. After Configure runs,
2269 the value is reset to a plain "ln" and is not useful.
2272 This variable holds the name of the command to make
2273 symbolic links (if they are supported). It can be used
2274 in the Makefile. It is either 'ln -s' or 'ln'
2276 locincpth (ccflags.U):
2277 This variable contains a list of additional directories to be
2278 searched by the compiler. The appropriate '-I' directives will
2279 be added to ccflags. This is intended to simplify setting
2280 local directories from the Configure command line.
2281 It's not much, but it parallels the loclibpth stuff in libpth.U.
2283 loclibpth (libpth.U):
2284 This variable holds the paths (space-separated) used to find local
2285 libraries. It is prepended to libpth, and is intended to be easily
2286 set from the command line.
2288 longdblsize (d_longdbl.U):
2289 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2290 indicates to the C program how many bytes there are in a long double,
2291 if this system supports long doubles.
2293 longlongsize (d_longlong.U):
2294 This variable contains the value of the LONGLONGSIZE symbol, which
2295 indicates to the C program how many bytes there are in a long long,
2296 if this system supports long long.
2298 longsize (intsize.U):
2299 This variable contains the value of the LONGSIZE symbol, which
2300 indicates to the C program how many bytes there are in a long.
2303 This variable is defined but not used by Configure.
2304 The value is a plain '' and is not useful.
2307 This variable is defined but not used by Configure.
2308 The value is a plain '' and is not useful.
2311 This variable is used internally by Configure to determine the
2312 full pathname (if any) of the ls program. After Configure runs,
2313 the value is reset to a plain "ls" and is not useful.
2315 lseeksize (lseektype.U):
2316 This variable defines lseektype to be something like off_t, long,
2317 or whatever type is used to declare lseek offset's type in the
2318 kernel (which also appears to be lseek's return type).
2320 lseektype (lseektype.U):
2321 This variable defines lseektype to be something like off_t, long,
2322 or whatever type is used to declare lseek offset's type in the
2323 kernel (which also appears to be lseek's return type).
2326 This variable is defined but not used by Configure.
2327 The value is a plain '' and is not useful.
2330 This variable is defined but not used by Configure.
2331 The value is a plain '' and is not useful.
2334 This variable is used internally by Configure to determine the
2335 full pathname (if any) of the make program. After Configure runs,
2336 the value is reset to a plain "make" and is not useful.
2338 make_set_make (make.U):
2339 Some versions of 'make' set the variable MAKE. Others do not.
2340 This variable contains the string to be included in Makefile.SH
2341 so that MAKE is set if needed, and not if not needed.
2342 Possible values are:
2343 make_set_make='#' # If your make program handles this for you,
2344 make_set_make="MAKE=$make" # if it doesn't.
2345 I used a comment character so that we can distinguish a
2346 'set' value (from a previous config.sh or Configure '-D' option)
2347 from an uncomputed value.
2349 mallocobj (mallocsrc.U):
2350 This variable contains the name of the malloc.o that this package
2351 generates, if that malloc.o is preferred over the system malloc.
2352 Otherwise the value is null. This variable is intended for generating
2353 Makefiles. See mallocsrc.
2355 mallocsrc (mallocsrc.U):
2356 This variable contains the name of the malloc.c that comes with
2357 the package, if that malloc.c is preferred over the system malloc.
2358 Otherwise the value is null. This variable is intended for generating
2361 malloctype (mallocsrc.U):
2362 This variable contains the kind of ptr returned by malloc and realloc.
2364 man1dir (man1dir.U):
2365 This variable contains the name of the directory in which manual
2366 source pages are to be put. It is the responsibility of the
2367 Makefile.SH to get the value of this into the proper command.
2368 You must be prepared to do the ~name expansion yourself.
2370 man1direxp (man1dir.U):
2371 This variable is the same as the man1dir variable, but is filename
2372 expanded at configuration time, for convenient use in makefiles.
2374 man1ext (man1dir.U):
2375 This variable contains the extension that the manual page should
2376 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2379 man3dir (man3dir.U):
2380 This variable contains the name of the directory in which manual
2381 source pages are to be put. It is the responsibility of the
2382 Makefile.SH to get the value of this into the proper command.
2383 You must be prepared to do the ~name expansion yourself.
2385 man3direxp (man3dir.U):
2386 This variable is the same as the man3dir variable, but is filename
2387 expanded at configuration time, for convenient use in makefiles.
2389 man3ext (man3dir.U):
2390 This variable contains the extension that the manual page should
2391 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2395 This variable is used internally by Configure to determine the
2396 full pathname (if any) of the Mcc program. After Configure runs,
2397 the value is reset to a plain "Mcc" and is not useful.
2400 This variable contains a flag which will tell the C compiler and loader
2401 to produce a program running with a medium memory model. If the
2402 medium model is not supported, contains the flag to produce large
2403 model programs. It is up to the Makefile to use this.
2405 mips_type (usrinc.U):
2406 This variable holds the environment type for the mips system.
2407 Possible values are "BSD 4.3" and "System V".
2410 This variable is used internally by Configure to determine the
2411 full pathname (if any) of the mkdir program. After Configure runs,
2412 the value is reset to a plain "mkdir" and is not useful.
2414 mmaptype (d_mmap.U):
2415 This symbol contains the type of pointer returned by mmap()
2416 (and simultaneously the type of the first argument).
2417 It can be 'void *' or 'caddr_t'.
2420 This variable contains the list of memory models supported by this
2421 system. Possible component values are none, split, unsplit, small,
2422 medium, large, and huge. The component values are space separated.
2424 modetype (modetype.U):
2425 This variable defines modetype to be something like mode_t,
2426 int, unsigned short, or whatever type is used to declare file
2427 modes for system calls.
2430 This variable is used internally by Configure to determine the
2431 full pathname (if any) of the more program. After Configure runs,
2432 the value is reset to a plain "more" and is not useful.
2434 multiarch (multiarch.U):
2435 This variable conditionally defines the MULTIARCH symbol
2436 which signifies the presence of multiplatform files.
2437 This is normally set by hints files.
2440 This variable is defined but not used by Configure.
2441 The value is a plain '' and is not useful.
2443 myarchname (archname.U):
2444 This variable holds the architecture name computed by Configure in
2445 a previous run. It is not intended to be perused by any user and
2446 should never be set in a hint file.
2448 mydomain (myhostname.U):
2449 This variable contains the eventual value of the MYDOMAIN symbol,
2450 which is the domain of the host the program is going to run on.
2451 The domain must be appended to myhostname to form a complete host name.
2452 The dot comes with mydomain, and need not be supplied by the program.
2454 myhostname (myhostname.U):
2455 This variable contains the eventual value of the MYHOSTNAME symbol,
2456 which is the name of the host the program is going to run on.
2457 The domain is not kept with hostname, but must be gotten from mydomain.
2458 The dot comes with mydomain, and need not be supplied by the program.
2460 myuname (Oldconfig.U):
2461 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2462 pseudo variables assignments in the output are stripped, thank you. The
2463 whole thing is then lower-cased.
2466 This variable contains the '-n' flag if that is what causes the echo
2467 command to suppress newline. Otherwise it is null. Correct usage is
2468 $echo $n "prompt for a question: $c".
2470 netdb_hlen_type (netdbtype.U):
2471 This variable holds the type used for the 2nd argument to
2472 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2473 This is only useful if you have gethostbyaddr(), naturally.
2475 netdb_host_type (netdbtype.U):
2476 This variable holds the type used for the 1st argument to
2477 gethostbyaddr(). Usually, this is char * or void *, possibly
2478 with or without a const prefix.
2479 This is only useful if you have gethostbyaddr(), naturally.
2481 netdb_name_type (netdbtype.U):
2482 This variable holds the type used for the argument to
2483 gethostbyname(). Usually, this is char * or const char *.
2484 This is only useful if you have gethostbyname(), naturally.
2486 netdb_net_type (netdbtype.U):
2487 This variable holds the type used for the 1st argument to
2488 getnetbyaddr(). Usually, this is int or long.
2489 This is only useful if you have getnetbyaddr(), naturally.
2492 This variable is used internally by Configure to determine the
2493 full pathname (if any) of the nm program. After Configure runs,
2494 the value is reset to a plain "nm" and is not useful.
2497 This variable holds the options that may be necessary for nm.
2499 nm_so_opt (usenm.U):
2500 This variable holds the options that may be necessary for nm
2501 to work on a shared library but that can not be used on an
2502 archive library. Currently, this is only used by Linux, where
2503 nm --dynamic is *required* to get symbols from an ELF library which
2504 has been stripped, but nm --dynamic is *fatal* on an archive library.
2505 Maybe Linux should just always set usenm=false.
2507 nonxs_ext (Extensions.U):
2508 This variable holds a list of all non-xs extensions included
2509 in the package. All of them will be built.
2512 This variable is used internally by Configure to determine the
2513 full pathname (if any) of the nroff program. After Configure runs,
2514 the value is reset to a plain "nroff" and is not useful.
2516 o_nonblock (nblock_io.U):
2517 This variable bears the symbol value to be used during open() or fcntl()
2518 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2519 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2520 but that is only supported by some devices.
2523 This is an old synonym for _o.
2525 old_pthread_create_joinable (d_pthrattrj.U):
2526 This variable defines the constant to use for creating joinable
2527 (aka undetached) pthreads. Unused if pthread.h defines
2528 PTHREAD_CREATE_JOINABLE. If used, possible values are
2529 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2531 optimize (ccflags.U):
2532 This variable contains any optimizer/debugger flag that should be used.
2533 It is up to the Makefile to use it.
2535 orderlib (orderlib.U):
2536 This variable is "true" if the components of libraries must be ordered
2537 (with `lorder $* | tsort`) before placing them in an archive. Set to
2538 "false" if ranlib or ar can generate random libraries.
2540 osname (Oldconfig.U):
2541 This variable contains the operating system name (e.g. sunos,
2542 solaris, hpux, etc.). It can be useful later on for setting
2543 defaults. Any spaces are replaced with underscores. It is set
2544 to a null string if we can't figure it out.
2546 osvers (Oldconfig.U):
2547 This variable contains the operating system version (e.g.
2548 4.1.3, 5.2, etc.). It is primarily used for helping select
2549 an appropriate hints file, but might be useful elsewhere for
2550 setting defaults. It is set to '' if we can't figure it out.
2551 We try to be flexible about how much of the version number
2552 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2553 same for this package, hints files might just be os_4.0 or
2554 os_4.1, etc., not keeping separate files for each little release.
2556 package (package.U):
2557 This variable contains the name of the package being constructed.
2558 It is primarily intended for the use of later Configure units.
2561 This variable contains the name of the preferred pager on the system.
2562 Usual values are (the full pathnames of) more, less, pg, or cat.
2565 This variable contains a command that produces the text of the
2566 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2567 "ypcat passwd" when NIS is used.
2569 patchlevel (patchlevel.U):
2570 The patchlevel level of this package.
2571 The value of patchlevel comes from the patchlevel.h file.
2574 This is an old synonym for p_ in Head.U, the character
2575 used to separate elements in the command shell search PATH.
2578 This variable is defined but not used by Configure.
2579 The value is a plain '' and is not useful.
2581 PERL_APIVERSION (Oldsyms.U):
2582 This value is manually set in patchlevel.h and is used
2583 to set the Configure apiversion variable.
2585 PERL_REVISION (Oldsyms.U):
2586 In a Perl version number such as 5.6.2, this is the 5.
2587 This value is manually set in patchlevel.h
2589 PERL_SUBVERSION (Oldsyms.U):
2590 In a Perl version number such as 5.6.2, this is the 2.
2591 Values greater than 50 represent potentially unstable
2592 development subversions.
2593 This value is manually set in patchlevel.h
2595 PERL_VERSION (Oldsyms.U):
2596 In a Perl version number such as 5.6.2, this is the 6.
2597 This value is manually set in patchlevel.h
2599 perladmin (perladmin.U):
2600 Electronic mail address of the perl5 administrator.
2602 perlpath (perlpath.U):
2603 This variable contains the eventual value of the PERLPATH symbol,
2604 which contains the name of the perl interpreter to be used in
2605 shell scripts and in the "eval 'exec'" idiom.
2608 This variable is used internally by Configure to determine the
2609 full pathname (if any) of the pg program. After Configure runs,
2610 the value is reset to a plain "pg" and is not useful.
2612 phostname (myhostname.U):
2613 This variable contains the eventual value of the PHOSTNAME symbol,
2614 which is a command that can be fed to popen() to get the host name.
2615 The program should probably not presume that the domain is or isn't
2618 pidtype (pidtype.U):
2619 This variable defines PIDTYPE to be something like pid_t, int,
2620 ushort, or whatever type is used to declare process ids in the kernel.
2623 Holds the private path used by Configure to find out the libraries.
2624 Its value is prepend to libpth. This variable takes care of special
2625 machines, like the mips. Usually, it should be empty.
2627 pm_apiversion (xs_apiversion.U):
2628 This variable contains the version of the oldest perl
2629 compatible with the present perl. (That is, pure perl modules
2630 written for $pm_apiversion will still work for the current
2631 version). perl.c:incpush() and lib/lib.pm will automatically
2632 search in $sitelib for older directories across major versions
2633 back to pm_apiversion. This is only useful if you have a perl
2634 library directory tree structured like the default one. The
2635 versioned site_perl library was introduced in 5.005, so that's
2636 the default setting for this variable. It's hard to imagine
2637 it changing before Perl6. It is included here for symmetry
2638 with xs_apiveprsion -- the searching algorithms will
2639 (presumably) be similar.
2640 See the INSTALL file for how this works.
2643 This variable is defined but not used by Configure.
2644 The value is a plain '' and is not useful.
2647 This variable is defined but not used by Configure.
2648 The value is a plain '' and is not useful.
2651 This variable holds the name of the directory below which the
2652 user will install the package. Usually, this is /usr/local, and
2653 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2654 man pages in /usr/local/man, etc. It is only used to set defaults
2655 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2657 prefixexp (prefix.U):
2658 This variable holds the full absolute path of the directory below
2659 which the user will install the package. Derived from prefix.
2661 privlib (privlib.U):
2662 This variable contains the eventual value of the PRIVLIB symbol,
2663 which is the name of the private library for this package. It may
2664 have a ~ on the front. It is up to the makefile to eventually create
2665 this directory while performing installation (with ~ substitution).
2667 privlibexp (privlib.U):
2668 This variable is the ~name expanded version of privlib, so that you
2669 may use it directly in Makefiles or shell scripts.
2671 prototype (prototype.U):
2672 This variable holds the eventual value of CAN_PROTOTYPE, which
2673 indicates the C compiler can handle funciton prototypes.
2675 ptrsize (ptrsize.U):
2676 This variable contains the value of the PTRSIZE symbol, which
2677 indicates to the C program how many bytes there are in a pointer.
2679 randbits (randfunc.U):
2680 Indicates how many bits are produced by the function used to
2681 generate normalized random numbers.
2683 randfunc (randfunc.U):
2684 Indicates the name of the random number function to use.
2685 Values include drand48, random, and rand. In C programs,
2686 the 'Drand01' macro is defined to generate uniformly distributed
2687 random numbers over the range [0., 1.[ (see drand01 and nrand).
2689 randseedtype (randfunc.U):
2690 Indicates the type of the argument of the seedfunc.
2692 ranlib (orderlib.U):
2693 This variable is set to the pathname of the ranlib program, if it is
2694 needed to generate random libraries. Set to ":" if ar can generate
2695 random libraries or if random libraries are not supported
2697 rd_nodata (nblock_io.U):
2698 This variable holds the return code from read() when no data is
2699 present. It should be -1, but some systems return 0 when O_NDELAY is
2700 used, which is a shame because you cannot make the difference between
2701 no data and an EOF.. Sigh!
2704 This variable is used internally by Configure to determine the
2705 full pathname (if any) of the rm program. After Configure runs,
2706 the value is reset to a plain "rm" and is not useful.
2709 This variable is defined but not used by Configure.
2710 The value is a plain '' and is not useful.
2713 This variable contains 'true' or 'false' depending whether the
2714 nm extraction should be performed or not, according to the value
2715 of usenm and the flags on the Configure command line.
2717 sched_yield (d_pthread_y.U):
2718 This variable defines the way to yield the execution
2719 of the current thread.
2721 scriptdir (scriptdir.U):
2722 This variable holds the name of the directory in which the user wants
2723 to put publicly scripts for the package in question. It is either
2724 the same directory as for binaries, or a special one that can be
2725 mounted across different architectures, like /usr/share. Programs
2726 must be prepared to deal with ~name expansion.
2728 scriptdirexp (scriptdir.U):
2729 This variable is the same as scriptdir, but is filename expanded
2730 at configuration time, for programs not wanting to bother with it.
2733 This variable is used internally by Configure to determine the
2734 full pathname (if any) of the sed program. After Configure runs,
2735 the value is reset to a plain "sed" and is not useful.
2737 seedfunc (randfunc.U):
2738 Indicates the random number generating seed function.
2739 Values include srand48, srandom, and srand.
2741 selectminbits (selectminbits.U):
2742 This variable holds the minimum number of bits operated by select.
2743 That is, if you do select(n, ...), how many bits at least will be
2744 cleared in the masks if some activity is detected. Usually this
2745 is either n or 32*ceil(n/32), especially many little-endians do
2746 the latter. This is only useful if you have select(), naturally.
2748 selecttype (selecttype.U):
2749 This variable holds the type used for the 2nd, 3rd, and 4th
2750 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2751 is defined, and 'int *' otherwise. This is only useful if you
2752 have select(), naturally.
2755 This variable is defined but not used by Configure.
2756 The value is a plain '' and is not useful.
2759 This variable contains the full pathname of the shell used
2760 on this system to execute Bourne shell scripts. Usually, this will be
2761 /bin/sh, though it's possible that some systems will have /bin/ksh,
2762 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2764 This unit comes before Options.U, so you can't set sh with a '-D'
2765 option, though you can override this (and startsh)
2766 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2769 This variable is defined but not used by Configure.
2770 The value is a plain '' and is not useful.
2772 sharpbang (spitshell.U):
2773 This variable contains the string #! if this system supports that
2776 shmattype (d_shmat.U):
2777 This symbol contains the type of pointer returned by shmat().
2778 It can be 'void *' or 'char *'.
2780 shortsize (intsize.U):
2781 This variable contains the value of the SHORTSIZE symbol which
2782 indicates to the C program how many bytes there are in a short.
2784 shrpenv (libperl.U):
2785 If the user builds a shared libperl.so, then we need to tell the
2786 'perl' executable where it will be able to find the installed libperl.so.
2787 One way to do this on some systems is to set the environment variable
2788 LD_RUN_PATH to the directory that will be the final location of the
2789 shared libperl.so. The makefile can use this with something like
2790 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2792 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2795 See the main perl Makefile.SH for actual working usage.
2796 Alternatively, we might be able to use a command line option such
2797 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2798 $archlibexp/CORE (Linux).
2800 shsharp (spitshell.U):
2801 This variable tells further Configure units whether your sh can
2804 sig_count (sig_name.U):
2805 This variable holds a number larger than the largest valid
2806 signal number. This is usually the same as the NSIG macro.
2808 sig_name (sig_name.U):
2809 This variable holds the signal names, space separated. The leading
2810 SIG in signal name is removed. A ZERO is prepended to the
2811 list. This is currently not used.
2813 sig_name_init (sig_name.U):
2814 This variable holds the signal names, enclosed in double quotes and
2815 separated by commas, suitable for use in the SIG_NAME definition
2816 below. A "ZERO" is prepended to the list, and the list is
2817 terminated with a plain 0. The leading SIG in signal names
2818 is removed. See sig_num.
2820 sig_num (sig_name.U):
2821 This variable holds the signal numbers, space separated. A ZERO is
2822 prepended to the list (corresponding to the fake SIGZERO), and
2823 the list is terminated with a 0. Those numbers correspond to
2824 the value of the signal listed in the same place within the
2827 sig_num_init (sig_name.U):
2828 This variable holds the signal numbers, enclosed in double quotes and
2829 separated by commas, suitable for use in the SIG_NUM definition
2830 below. A "ZERO" is prepended to the list, and the list is
2831 terminated with a plain 0.
2833 signal_t (d_voidsig.U):
2834 This variable holds the type of the signal handler (void or int).
2836 sitearch (sitearch.U):
2837 This variable contains the eventual value of the SITEARCH symbol,
2838 which is the name of the private library for this package. It may
2839 have a ~ on the front. It is up to the makefile to eventually create
2840 this directory while performing installation (with ~ substitution).
2842 sitearchexp (sitearch.U):
2843 This variable is the ~name expanded version of sitearch, so that you
2844 may use it directly in Makefiles or shell scripts.
2846 sitebin (sitebin.U):
2847 This variable holds the name of the directory in which the user wants
2848 to put add-on publicly executable files for the package in question. It
2849 is most often a local directory such as /usr/local/bin. Programs using
2850 this variable must be prepared to deal with ~name substitution.
2852 sitebinexp (sitebin.U):
2853 This is the same as the sitebin variable, but is filename expanded at
2854 configuration time, for use in your makefiles.
2856 sitelib (sitelib.U):
2857 This variable contains the eventual value of the SITELIB symbol,
2858 which is the name of the private library for this package. It may
2859 have a ~ on the front. It is up to the makefile to eventually create
2860 this directory while performing installation (with ~ substitution).
2862 sitelibexp (sitelib.U):
2863 This variable is the ~name expanded version of sitelib, so that you
2864 may use it directly in Makefiles or shell scripts.
2866 siteprefix (siteprefix.U):
2867 This variable holds the full absolute path of the directory below
2868 which the user will install add-on packages.
2870 siteprefixexp (siteprefix.U):
2871 This variable holds the full absolute path of the directory below
2872 which the user will install add-on packages. Derived from siteprefix.
2874 sizetype (sizetype.U):
2875 This variable defines sizetype to be something like size_t,
2876 unsigned long, or whatever type is used to declare length
2877 parameters for string functions.
2880 This variable is defined but not used by Configure.
2881 The value is a plain '' and is not useful.
2884 This variable is defined but not used by Configure.
2885 The value is a plain '' and is not useful.
2888 This variable contains a flag which will tell the C compiler and loader
2889 to produce a program running with a small memory model. It is up to
2890 the Makefile to use this.
2893 This variable holds the extension used to identify shared libraries
2894 (also known as shared objects) on the system. Usually set to 'so'.
2896 sockethdr (d_socket.U):
2897 This variable has any cpp '-I' flags needed for socket support.
2899 socketlib (d_socket.U):
2900 This variable has the names of any libraries needed for socket support.
2903 This variable is used internally by Configure to determine the
2904 full pathname (if any) of the sort program. After Configure runs,
2905 the value is reset to a plain "sort" and is not useful.
2907 spackage (package.U):
2908 This variable contains the name of the package being constructed,
2909 with the first letter uppercased, i.e. suitable for starting
2912 spitshell (spitshell.U):
2913 This variable contains the command necessary to spit out a runnable
2914 shell on this system. It is either cat or a grep '-v' for # comments.
2917 This variable contains a flag which will tell the C compiler and loader
2918 to produce a program that will run in separate I and D space, for those
2919 machines that support separation of instruction and data space. It is
2920 up to the Makefile to use this.
2922 sPRId64 (quadfio.U):
2923 This variable, if defined, contains the string used by stdio to
2924 format 64-bit decimal numbers (format 'd') for output.
2926 sPRIeldbl (longdblfio.U):
2927 This variable, if defined, contains the string used by stdio to
2928 format long doubles (format 'e') for output.
2930 sPRIEldbl (longdblfio.U):
2931 This variable, if defined, contains the string used by stdio to
2932 format long doubles (format 'E') for output.
2934 sPRIfldbl (longdblfio.U):
2935 This variable, if defined, contains the string used by stdio to
2936 format long doubles (format 'f') for output.
2938 sPRIFldbl (longdblfio.U):
2939 This variable, if defined, contains the string used by stdio to
2940 format long doubles (format 'F') for output.
2942 sPRIgldbl (longdblfio.U):
2943 This variable, if defined, contains the string used by stdio to
2944 format long doubles (format 'g') for output.
2946 sPRIGldbl (longdblfio.U):
2947 This variable, if defined, contains the string used by stdio to
2948 format long doubles (format 'G') for output.
2950 sPRIi64 (quadfio.U):
2951 This variable, if defined, contains the string used by stdio to
2952 format 64-bit decimal numbers (format 'i') for output.
2954 sPRIo64 (quadfio.U):
2955 This variable, if defined, contains the string used by stdio to
2956 format 64-bit octal numbers (format 'o') for output.
2958 sPRIu64 (quadfio.U):
2959 This variable, if defined, contains the string used by stdio to
2960 format 64-bit unsigned decimal numbers (format 'u') for output.
2962 sPRIx64 (quadfio.U):
2963 This variable, if defined, contains the string used by stdio to
2964 format 64-bit hexadecimal numbers (format 'x') for output.
2966 sPRIX64 (quadfio.U):
2967 This variable, if defined, contains the string used by stdio to
2968 format 64-bit hExADECimAl numbers (format 'X') for output.
2971 This variable holds the path to the package source. It is up to
2972 the Makefile to use this variable and set VPATH accordingly to
2973 find the sources remotely.
2975 ssizetype (ssizetype.U):
2976 This variable defines ssizetype to be something like ssize_t,
2977 long or int. It is used by functions that return a count
2978 of bytes or an error condition. It must be a signed type.
2979 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2981 startperl (startperl.U):
2982 This variable contains the string to put on the front of a perl
2983 script to make sure (hopefully) that it runs with perl and not some
2984 shell. Of course, that leading line must be followed by the classical
2986 eval 'exec perl -S $0 ${1+"$@"}'
2987 if $running_under_some_shell;
2988 to guarantee perl startup should the shell execute the script. Note
2989 that this magic incatation is not understood by csh.
2991 startsh (startsh.U):
2992 This variable contains the string to put on the front of a shell
2993 script to make sure (hopefully) that it runs with sh and not some
2996 static_ext (Extensions.U):
2997 This variable holds a list of XS extension files we want to
2998 link statically into the package. It is used by Makefile.
3000 stdchar (stdchar.U):
3001 This variable conditionally defines STDCHAR to be the type of char
3002 used in stdio.h. It has the values "unsigned char" or "char".
3004 stdio_base (d_stdstdio.U):
3005 This variable defines how, given a FILE pointer, fp, to access the
3006 _base field (or equivalent) of stdio.h's FILE structure. This will
3007 be used to define the macro FILE_base(fp).
3009 stdio_bufsiz (d_stdstdio.U):
3010 This variable defines how, given a FILE pointer, fp, to determine
3011 the number of bytes store in the I/O buffer pointer to by the
3012 _base field (or equivalent) of stdio.h's FILE structure. This will
3013 be used to define the macro FILE_bufsiz(fp).
3015 stdio_cnt (d_stdstdio.U):
3016 This variable defines how, given a FILE pointer, fp, to access the
3017 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3018 be used to define the macro FILE_cnt(fp).
3020 stdio_filbuf (d_stdstdio.U):
3021 This variable defines how, given a FILE pointer, fp, to tell
3022 stdio to refill it's internal buffers (?). This will
3023 be used to define the macro FILE_filbuf(fp).
3025 stdio_ptr (d_stdstdio.U):
3026 This variable defines how, given a FILE pointer, fp, to access the
3027 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3028 be used to define the macro FILE_ptr(fp).
3030 stdio_stream_array (stdio_streams.U):
3031 This variable tells the name of the array holding the stdio streams.
3032 Usual values include _iob, __iob, and __sF.
3034 strings (i_string.U):
3035 This variable holds the full path of the string header that will be
3036 used. Typically /usr/include/string.h or /usr/include/strings.h.
3039 This variable is defined but not used by Configure.
3040 The value is a plain '' and is not useful.
3042 subversion (patchlevel.U):
3043 The subversion level of this package.
3044 The value of subversion comes from the patchlevel.h file.
3045 This is unique to perl.
3048 This variable holds the place where the manual is located on this
3049 system. It is not the place where the user wants to put his manual
3050 pages. Rather it is the place where Configure may look to find manual
3051 for unix commands (section 1 of the manual usually). See mansrc.
3054 This variable is defined but not used by Configure.
3055 The value is a plain '' and is not useful.
3058 This variable is defined but not used by Configure.
3059 The value is a plain '' and is not useful.
3062 This variable is defined but not used by Configure.
3063 The value is a plain '' and is not useful.
3066 This variable is defined but not used by Configure.
3067 The value is a plain '' and is not useful.
3070 This variable is used internally by Configure to determine the
3071 full pathname (if any) of the test program. After Configure runs,
3072 the value is reset to a plain "test" and is not useful.
3074 timeincl (i_time.U):
3075 This variable holds the full path of the included time header(s).
3077 timetype (d_time.U):
3078 This variable holds the type returned by time(). It can be long,
3079 or time_t on BSD sites (in which case <sys/types.h> should be
3080 included). Anyway, the type Time_t should be used.
3083 This variable is used internally by Configure to determine the
3084 full pathname (if any) of the touch program. After Configure runs,
3085 the value is reset to a plain "touch" and is not useful.
3088 This variable is used internally by Configure to determine the
3089 full pathname (if any) of the tr program. After Configure runs,
3090 the value is reset to a plain "tr" and is not useful.
3093 This variable contains the value to be passed to the tr(1)
3094 command to transliterate a newline. Typical values are
3095 '\012' and '\n'. This is needed for EBCDIC systems where
3096 newline is not necessarily '\012'.
3099 This variable is defined but not used by Configure.
3100 The value is a plain '' and is not useful.
3102 uidsign (uidsign.U):
3103 This variable contains the signedness of a uidtype.
3104 1 for unsigned, -1 for signed.
3106 uidtype (uidtype.U):
3107 This variable defines Uid_t to be something like uid_t, int,
3108 ushort, or whatever type is used to declare user ids in the kernel.
3111 This variable is used internally by Configure to determine the
3112 full pathname (if any) of the uname program. After Configure runs,
3113 the value is reset to a plain "uname" and is not useful.
3116 This variable is used internally by Configure to determine the
3117 full pathname (if any) of the uniq program. After Configure runs,
3118 the value is reset to a plain "uniq" and is not useful.
3120 use64bits (use64bits.U):
3121 This variable conditionally defines the USE_64_BITS symbol,
3122 and indicates that explicit 64-bit interfaces should be used
3126 This variable indicates if the the system supports dynamic
3127 loading of some sort. See also dlsrc and dlobj.
3129 uselargefiles (uselfs.U):
3130 This variable conditionally defines the USE_LARGE_FILES symbol,
3131 and indicates that large file interfaces should be used when
3132 available. The use64bits symbol will also be turned on if necessary.
3134 uselongdouble (uselongdbl.U):
3135 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3136 and indicates that long doubles should be used when available.
3138 usemorebits (usemorebits.U):
3139 This variable conditionally defines the USE_MORE_BITS symbol,
3140 and indicates that explicit 64-bit interfaces and long doubles
3141 should be used when available.
3143 usemultiplicity (usemultiplicity.U):
3144 This variable conditionally defines the MULTIPLICITY symbol,
3145 and indicates that Perl should be built to use multiplicity.
3147 usemymalloc (mallocsrc.U):
3148 This variable contains y if the malloc that comes with this package
3149 is desired over the system's version of malloc. People often include
3150 special versions of malloc for effiency, but such versions are often
3151 less portable. See also mallocsrc and mallocobj.
3152 If this is 'y', then -lmalloc is removed from $libs.
3155 This variable contains 'true' or 'false' depending whether the
3156 nm extraction is wanted or not.
3158 useopcode (Extensions.U):
3159 This variable holds either 'true' or 'false' to indicate
3160 whether the Opcode extension should be used. The sole
3161 use for this currently is to allow an easy mechanism
3162 for users to skip the Opcode extension from the Configure
3165 useperlio (useperlio.U):
3166 This variable conditionally defines the USE_PERLIO symbol,
3167 and indicates that the PerlIO abstraction should be
3170 useposix (Extensions.U):
3171 This variable holds either 'true' or 'false' to indicate
3172 whether the POSIX extension should be used. The sole
3173 use for this currently is to allow an easy mechanism
3174 for hints files to indicate that POSIX will not compile
3175 on a particular system.
3178 This variable is set to true when the user agrees to use sfio.
3179 It is set to false when sfio is not available or when the user
3180 explicitely requests not to use sfio. It is here primarily so
3181 that command-line settings can override the auto-detection of
3182 d_sfio without running into a "WHOA THERE".
3184 useshrplib (libperl.U):
3185 This variable is set to 'yes' if the user wishes
3186 to build a shared libperl, and 'no' otherwise.
3188 usesocks (usesocks.U):
3189 This variable conditionally defines the USE_SOCKS symbol,
3190 and indicates that Perl should be built to use SOCKS.
3192 usethreads (usethreads.U):
3193 This variable conditionally defines the USE_THREADS symbol,
3194 and indicates that Perl should be built to use threads.
3196 usevendorprefix (vendorprefix.U):
3197 This variable tells whether the vendorprefix
3198 and consequently other vendor* paths are in use.
3200 usevfork (d_vfork.U):
3201 This variable is set to true when the user accepts to use vfork.
3202 It is set to false when no vfork is available or when the user
3203 explicitely requests not to use vfork.
3206 This variable holds the path of the include files, which is
3207 usually /usr/include. It is mainly used by other Configure units.
3210 This variable is defined but not used by Configure.
3211 The value is a plain '' and is not useful.
3213 vendorbin (vendorbin.U):
3214 This variable contains the eventual value of the VENDORBIN symbol,
3215 which is the name of the private directory for exuctables for this package.
3216 It may have a ~ on the front. It is up to the makefile to eventually create
3217 this directory while performing installation (with ~ substitution).
3218 Vendors who distribute perl binaries may place their own
3219 extensions and modules in this directory.
3221 vendorbinexp (vendorbin.U):
3222 This variable is the ~name expanded version of vendorbin, so that you
3223 may use it directly in Makefiles or shell scripts.
3225 vendorlib (vendorlib.U):
3226 This variable contains the eventual value of the VENDORLIB symbol,
3227 which is the name of the private library for this package. It may
3228 have a ~ on the front. It is up to the makefile to eventually create
3229 this directory while performing installation (with ~ substitution).
3230 Vendors who distribute perl binaries may place their own
3231 extensions and modules in this directory.
3233 vendorlibexp (vendorlib.U):
3234 This variable is the ~name expanded version of vendorlib, so that you
3235 may use it directly in Makefiles or shell scripts.
3237 vendorprefix (vendorprefix.U):
3238 This variable holds the full absolute path of the directory below
3239 which the vendor will install add-on packages.
3241 vendorprefixexp (vendorprefix.U):
3242 This variable holds the full absolute path of the directory below
3243 which the vendor will install add-on packages. Derived from vendorprefix.
3245 version (patchlevel.U):
3246 The full version number of this package. This combines
3247 baserev, patchlevel, and subversion to get the full
3248 version number, including any possible subversions. Care
3249 is taken to use the C locale in order to get something
3250 like 5.004 instead of 5,004. This is unique to perl.
3253 This variable is defined but not used by Configure.
3254 The value is a plain '' and is not useful.
3256 voidflags (voidflags.U):
3257 This variable contains the eventual value of the VOIDFLAGS symbol,
3258 which indicates how much support of the void type is given by this
3259 compiler. See VOIDFLAGS for more info.
3262 This variable holds extra path (space-separated) used to find
3263 libraries on this platform, for example CPU-specific libraries
3264 (on multi-CPU platforms) may be listed here.
3266 xs_apiversion (xs_apiversion.U):
3267 This variable contains the version of the oldest perl binary
3268 compatible with the present perl. perl.c:incpush() and
3269 lib/lib.pm will automatically search in $sitearch for older
3270 directories across major versions back to xs_apiversion.
3271 This is only useful if you have a perl library directory tree
3272 structured like the default one.
3273 See INSTALL for how this works.
3274 The versioned site_perl directory was introduced in 5.005,
3275 so that is the lowest possible value.
3276 Since this can depend on compile time options (such as
3277 bincompat) it is set by Configure. Other non-default sources
3278 of potential incompatibility, such as multiplicity, threads,
3279 debugging, 64bits, sfio, etc., are not checked for currently,
3280 though in principle we could go snooping around in old
3284 This variable is defined but not used by Configure.
3285 The value is a plain '' and is not useful.
3288 This variable is used internally by Configure to determine the
3289 full pathname (if any) of the zip program. After Configure runs,
3290 the value is reset to a plain "zip" and is not useful.