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
380 This variable conditionally defines the HASCONST symbol, which
381 indicates to the C program that this C compiler knows about the
385 This variable conditionally defines the CRYPT symbol, which
386 indicates to the C program that the crypt() routine is available
387 to encrypt passwords and the like.
390 This variable conditionally defines the CSH symbol, which
391 indicates to the C program that the C-shell exists.
393 d_cuserid (d_cuserid.U):
394 This variable conditionally defines the HAS_CUSERID symbol, which
395 indicates to the C program that the cuserid() routine is available
396 to get character login names.
398 d_dbl_dig (d_dbl_dig.U):
399 This variable conditionally defines d_dbl_dig if this system's
400 header files provide DBL_DIG, which is the number of significant
401 digits in a double precision number.
403 d_difftime (d_difftime.U):
404 This variable conditionally defines the HAS_DIFFTIME symbol, which
405 indicates to the C program that the difftime() routine is available.
407 d_dirnamlen (i_dirent.U):
408 This variable conditionally defines DIRNAMLEN, which indicates
409 to the C program that the length of directory entry names is
410 provided by a d_namelen field.
412 d_dlerror (d_dlerror.U):
413 This variable conditionally defines the HAS_DLERROR symbol, which
414 indicates to the C program that the dlerror() routine is available.
416 d_dlopen (d_dlopen.U):
417 This variable conditionally defines the HAS_DLOPEN symbol, which
418 indicates to the C program that the dlopen() routine is available.
420 d_dlsymun (d_dlsymun.U):
421 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
422 indicates that we need to prepend an underscore to the symbol
423 name before calling dlsym().
425 d_dosuid (d_dosuid.U):
426 This variable conditionally defines the symbol DOSUID, which
427 tells the C program that it should insert setuid emulation code
428 on hosts which have setuid #! scripts disabled.
430 d_drand48proto (d_drand48proto.U):
431 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
432 which indicates to the C program that the system provides
433 a prototype for the drand48() function. Otherwise, it is
434 up to the program to supply one.
437 This variable conditionally defines HAS_DUP2 if dup2() is
438 available to duplicate file descriptors.
440 d_eaccess (d_eaccess.U):
441 This variable conditionally defines the HAS_EACCESS symbol, which
442 indicates to the C program that the eaccess() routine is available.
444 d_endgrent (d_endgrent.U):
445 This variable conditionally defines the HAS_ENDGRENT symbol, which
446 indicates to the C program that the endgrent() routine is available
447 for sequential access of the group database.
449 d_endhent (d_endhent.U):
450 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
451 available to close whatever was being used for host queries.
453 d_endnent (d_endnent.U):
454 This variable conditionally defines HAS_ENDNETENT if endnetent() is
455 available to close whatever was being used for network queries.
457 d_endpent (d_endpent.U):
458 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
459 available to close whatever was being used for protocol queries.
461 d_endpwent (d_endpwent.U):
462 This variable conditionally defines the HAS_ENDPWENT symbol, which
463 indicates to the C program that the endpwent() routine is available
464 for sequential access of the passwd database.
466 d_endsent (d_endsent.U):
467 This variable conditionally defines HAS_ENDSERVENT if endservent() is
468 available to close whatever was being used for service queries.
470 d_endspent (d_endspent.U):
471 This variable conditionally defines HAS_ENDSPENT if endspent() is
472 available to finalize the scan of SysV shadow password entries.
474 d_eofnblk (nblock_io.U):
475 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
476 when reading from a non-blocking I/O source.
479 This variable conditionally defines the symbols EUNICE and VAX, which
480 alerts the C program that it must deal with ideosyncracies of VMS.
482 d_fchmod (d_fchmod.U):
483 This variable conditionally defines the HAS_FCHMOD symbol, which
484 indicates to the C program that the fchmod() routine is available
485 to change mode of opened files.
487 d_fchown (d_fchown.U):
488 This variable conditionally defines the HAS_FCHOWN symbol, which
489 indicates to the C program that the fchown() routine is available
490 to change ownership of opened files.
493 This variable conditionally defines the HAS_FCNTL symbol, and indicates
494 whether the fcntl() function exists
496 d_fd_macros (d_fd_set.U):
497 This variable contains the eventual value of the HAS_FD_MACROS symbol,
498 which indicates if your C compiler knows about the macros which
499 manipulate an fd_set.
501 d_fd_set (d_fd_set.U):
502 This variable contains the eventual value of the HAS_FD_SET symbol,
503 which indicates if your C compiler knows about the fd_set typedef.
505 d_fds_bits (d_fd_set.U):
506 This variable contains the eventual value of the HAS_FDS_BITS symbol,
507 which indicates if your fd_set typedef contains the fds_bits member.
508 If you have an fd_set typedef, but the dweebs who installed it did
509 a half-fast job and neglected to provide the macros to manipulate
510 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
512 d_fgetpos (d_fgetpos.U):
513 This variable conditionally defines HAS_FGETPOS if fgetpos() is
514 available to get the file position indicator.
516 d_flexfnam (d_flexfnam.U):
517 This variable conditionally defines the FLEXFILENAMES symbol, which
518 indicates that the system supports filenames longer than 14 characters.
521 This variable conditionally defines HAS_FLOCK if flock() is
522 available to do file locking.
525 This variable conditionally defines the HAS_FORK symbol, which
526 indicates to the C program that the fork() routine is available.
528 d_fpathconf (d_pathconf.U):
529 This variable conditionally defines the HAS_FPATHCONF symbol, which
530 indicates to the C program that the pathconf() routine is available
531 to determine file-system related limits and options associated
532 with a given open file descriptor.
535 This symbol will be defined if the C compiler supports fpos64_t.
537 d_fs_data_s (d_fs_data_s.U):
538 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
539 which indicates that the struct fs_data is supported.
541 d_fseeko (d_fseeko.U):
542 This variable conditionally defines the HAS_FSEEKO symbol, which
543 indicates to the C program that the fseeko() routine is available.
545 d_fsetpos (d_fsetpos.U):
546 This variable conditionally defines HAS_FSETPOS if fsetpos() is
547 available to set the file position indicator.
549 d_fstatfs (d_fstatfs.U):
550 This variable conditionally defines the HAS_FSTATFS symbol, which
551 indicates to the C program that the fstatfs() routine is available.
553 d_fstatvfs (d_statvfs.U):
554 This variable conditionally defines the HAS_FSTATVFS symbol, which
555 indicates to the C program that the fstatvfs() routine is available.
557 d_ftello (d_ftello.U):
558 This variable conditionally defines the HAS_FTELLO symbol, which
559 indicates to the C program that the ftello() routine is available.
562 This variable conditionally defines the HAS_FTIME symbol, which indicates
563 that the ftime() routine exists. The ftime() routine is basically
564 a sub-second accuracy clock.
566 d_Gconvert (d_gconvert.U):
567 This variable holds what Gconvert is defined as to convert
568 floating point numbers into strings. It could be 'gconvert'
569 or a more complex macro emulating gconvert with gcvt() or sprintf.
571 d_Gconvert='gconvert((x),(n),(t),(b))'
572 d_Gconvert='gcvt((x),(n),(b))'
573 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
575 d_getgrent (d_getgrent.U):
576 This variable conditionally defines the HAS_GETGRENT symbol, which
577 indicates to the C program that the getgrent() routine is available
578 for sequential access of the group database.
580 d_getgrps (d_getgrps.U):
581 This variable conditionally defines the HAS_GETGROUPS symbol, which
582 indicates to the C program that the getgroups() routine is available
583 to get the list of process groups.
585 d_gethbyaddr (d_gethbyad.U):
586 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
587 indicates to the C program that the gethostbyaddr() routine is available
588 to look up hosts by their IP addresses.
590 d_gethbyname (d_gethbynm.U):
591 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
592 indicates to the C program that the gethostbyname() routine is available
593 to look up host names in some data base or other.
595 d_gethent (d_gethent.U):
596 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
597 available to look up host names in some data base or another.
599 d_gethname (d_gethname.U):
600 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
601 indicates to the C program that the gethostname() routine may be
602 used to derive the host name.
604 d_gethostprotos (d_gethostprotos.U):
605 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
606 which indicates to the C program that <netdb.h> supplies
607 prototypes for the various gethost*() functions.
608 See also netdbtype.U for probing for various netdb types.
610 d_getlogin (d_getlogin.U):
611 This variable conditionally defines the HAS_GETLOGIN symbol, which
612 indicates to the C program that the getlogin() routine is available
613 to get the login name.
615 d_getmnt (d_getmnt.U):
616 This variable conditionally defines the HAS_GETMNT symbol, which
617 indicates to the C program that the getmnt() routine is available
618 to retrieve one or more mount info blocks by filename.
620 d_getmntent (d_getmntent.U):
621 This variable conditionally defines the HAS_GETMNTENT symbol, which
622 indicates to the C program that the getmntent() routine is available
623 to iterate through mounted files to get their mount info.
625 d_getnbyaddr (d_getnbyad.U):
626 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
627 indicates to the C program that the getnetbyaddr() routine is available
628 to look up networks by their IP addresses.
630 d_getnbyname (d_getnbynm.U):
631 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
632 indicates to the C program that the getnetbyname() routine is available
633 to look up networks by their names.
635 d_getnent (d_getnent.U):
636 This variable conditionally defines HAS_GETNETENT if getnetent() is
637 available to look up network names in some data base or another.
639 d_getnetprotos (d_getnetprotos.U):
640 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
641 which indicates to the C program that <netdb.h> supplies
642 prototypes for the various getnet*() functions.
643 See also netdbtype.U for probing for various netdb types.
645 d_getpbyname (d_getprotby.U):
646 This variable conditionally defines the HAS_GETPROTOBYNAME
647 symbol, which indicates to the C program that the
648 getprotobyname() routine is available to look up protocols
651 d_getpbynumber (d_getprotby.U):
652 This variable conditionally defines the HAS_GETPROTOBYNUMBER
653 symbol, which indicates to the C program that the
654 getprotobynumber() routine is available to look up protocols
657 d_getpent (d_getpent.U):
658 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
659 available to look up protocols in some data base or another.
661 d_getpgid (d_getpgid.U):
662 This variable conditionally defines the HAS_GETPGID symbol, which
663 indicates to the C program that the getpgid(pid) function
664 is available to get the process group id.
666 d_getpgrp2 (d_getpgrp2.U):
667 This variable conditionally defines the HAS_GETPGRP2 symbol, which
668 indicates to the C program that the getpgrp2() (as in DG/UX) routine
669 is available to get the current process group.
671 d_getpgrp (d_getpgrp.U):
672 This variable conditionally defines HAS_GETPGRP if getpgrp() is
673 available to get the current process group.
675 d_getppid (d_getppid.U):
676 This variable conditionally defines the HAS_GETPPID symbol, which
677 indicates to the C program that the getppid() routine is available
678 to get the parent process ID.
680 d_getprior (d_getprior.U):
681 This variable conditionally defines HAS_GETPRIORITY if getpriority()
682 is available to get a process's priority.
684 d_getprotoprotos (d_getprotoprotos.U):
685 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
686 which indicates to the C program that <netdb.h> supplies
687 prototypes for the various getproto*() functions.
688 See also netdbtype.U for probing for various netdb types.
690 d_getpwent (d_getpwent.U):
691 This variable conditionally defines the HAS_GETPWENT symbol, which
692 indicates to the C program that the getpwent() routine is available
693 for sequential access of the passwd database.
695 d_getsbyname (d_getsrvby.U):
696 This variable conditionally defines the HAS_GETSERVBYNAME
697 symbol, which indicates to the C program that the
698 getservbyname() routine is available to look up services
701 d_getsbyport (d_getsrvby.U):
702 This variable conditionally defines the HAS_GETSERVBYPORT
703 symbol, which indicates to the C program that the
704 getservbyport() routine is available to look up services
707 d_getsent (d_getsent.U):
708 This variable conditionally defines HAS_GETSERVENT if getservent() is
709 available to look up network services in some data base or another.
711 d_getservprotos (d_getservprotos.U):
712 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
713 which indicates to the C program that <netdb.h> supplies
714 prototypes for the various getserv*() functions.
715 See also netdbtype.U for probing for various netdb types.
717 d_getspent (d_getspent.U):
718 This variable conditionally defines HAS_GETSPENT if getspent() is
719 available to retrieve SysV shadow password entries sequentially.
721 d_getspnam (d_getspnam.U):
722 This variable conditionally defines HAS_GETSPNAM if getspnam() is
723 available to retrieve SysV shadow password entries by name.
725 d_gettimeod (d_ftime.U):
726 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
727 indicates that the gettimeofday() system call exists (to obtain a
728 sub-second accuracy clock). You should probably include <sys/resource.h>.
730 d_gnulibc (d_gnulibc.U):
731 Defined if we're dealing with the GNU C Library.
733 d_grpasswd (i_grp.U):
734 This variable conditionally defines GRPASSWD, which indicates
735 that struct group in <grp.h> contains gr_passwd.
737 d_hasmntopt (d_hasmntopt.U):
738 This variable conditionally defines the HAS_HASMNTOPT symbol, which
739 indicates to the C program that the hasmntopt() routine is available
740 to query the mount options of file systems.
743 This variable conditionally defines HAS_HTONL if htonl() and its
744 friends are available to do network order byte swapping.
746 d_index (d_strchr.U):
747 This variable conditionally defines HAS_INDEX if index() and
748 rindex() are available for string searching.
750 d_inetaton (d_inetaton.U):
751 This variable conditionally defines the HAS_INET_ATON symbol, which
752 indicates to the C program that the inet_aton() function is available
753 to parse IP address "dotted-quad" strings.
755 d_int64t (i_inttypes.U):
756 This symbol will be defined if the C compiler supports int64_t.
758 d_iovec_s (i_sysuio.U):
759 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
760 which indicates that the struct iovec is supported.
762 d_isascii (d_isascii.U):
763 This variable conditionally defines the HAS_ISASCII constant,
764 which indicates to the C program that isascii() is available.
766 d_killpg (d_killpg.U):
767 This variable conditionally defines the HAS_KILLPG symbol, which
768 indicates to the C program that the killpg() routine is available
769 to kill process groups.
771 d_lchown (d_lchown.U):
772 This variable conditionally defines the HAS_LCHOWN symbol, which
773 indicates to the C program that the lchown() routine is available
774 to operate on a symbolic link (instead of following the link).
776 d_ldbl_dig (d_ldbl_dig.U):
777 This variable conditionally defines d_ldbl_dig if this system's
778 header files provide LDBL_DIG, which is the number of significant
779 digits in a long double precision number.
782 This variable conditionally defines HAS_LINK if link() is
783 available to create hard links.
786 This variable conditionally defines the HAS_LLSEEK symbol, which
787 indicates to the C program that the llseek() routine is available.
789 d_locconv (d_locconv.U):
790 This variable conditionally defines HAS_LOCALECONV if localeconv() is
791 available for numeric and monetary formatting conventions.
794 This variable conditionally defines HAS_LOCKF if lockf() is
795 available to do file locking.
797 d_longdbl (d_longdbl.U):
798 This variable conditionally defines HAS_LONG_DOUBLE if
799 the long double type is supported.
801 d_longlong (d_longlong.U):
802 This variable conditionally defines HAS_LONG_LONG if
803 the long long type is supported.
806 This variable conditionally defines HAS_LSTAT if lstat() is
807 available to do file stats on symbolic links.
810 This variable conditionally defines the HAS_MBLEN symbol, which
811 indicates to the C program that the mblen() routine is available
812 to find the number of bytes in a multibye character.
814 d_mbstowcs (d_mbstowcs.U):
815 This variable conditionally defines the HAS_MBSTOWCS symbol, which
816 indicates to the C program that the mbstowcs() routine is available
817 to convert a multibyte string into a wide character string.
819 d_mbtowc (d_mbtowc.U):
820 This variable conditionally defines the HAS_MBTOWC symbol, which
821 indicates to the C program that the mbtowc() routine is available
822 to convert multibyte to a wide character.
824 d_memchr (d_memchr.U):
825 This variable conditionally defines the HAS_MEMCHR symbol, which
826 indicates to the C program that the memchr() routine is available
827 to locate characters within a C string.
829 d_memcmp (d_memcmp.U):
830 This variable conditionally defines the HAS_MEMCMP symbol, which
831 indicates to the C program that the memcmp() routine is available
832 to compare blocks of memory.
834 d_memcpy (d_memcpy.U):
835 This variable conditionally defines the HAS_MEMCPY symbol, which
836 indicates to the C program that the memcpy() routine is available
837 to copy blocks of memory.
839 d_memmove (d_memmove.U):
840 This variable conditionally defines the HAS_MEMMOVE symbol, which
841 indicates to the C program that the memmove() routine is available
842 to copy potentatially overlapping blocks of memory.
844 d_memset (d_memset.U):
845 This variable conditionally defines the HAS_MEMSET symbol, which
846 indicates to the C program that the memset() routine is available
847 to set blocks of memory.
850 This variable conditionally defines the HAS_MKDIR symbol, which
851 indicates to the C program that the mkdir() routine is available
852 to create directories..
854 d_mkfifo (d_mkfifo.U):
855 This variable conditionally defines the HAS_MKFIFO symbol, which
856 indicates to the C program that the mkfifo() routine is available.
858 d_mktime (d_mktime.U):
859 This variable conditionally defines the HAS_MKTIME symbol, which
860 indicates to the C program that the mktime() routine is available.
863 This variable conditionally defines the HAS_MSG symbol, which
864 indicates that the entire msg*(2) library is present.
866 d_msg_ctrunc (d_socket.U):
867 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
868 which indicates that the MSG_CTRUNC is available. #ifdef is
869 not enough because it may be an enum, glibc has been known to do this.
871 d_msg_dontroute (d_socket.U):
872 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
873 which indicates that the MSG_DONTROUTE is available. #ifdef is
874 not enough because it may be an enum, glibc has been known to do this.
876 d_msg_oob (d_socket.U):
877 This variable conditionally defines the HAS_MSG_OOB symbol,
878 which indicates that the MSG_OOB is available. #ifdef is
879 not enough because it may be an enum, glibc has been known to do this.
881 d_msg_peek (d_socket.U):
882 This variable conditionally defines the HAS_MSG_PEEK symbol,
883 which indicates that the MSG_PEEK is available. #ifdef is
884 not enough because it may be an enum, glibc has been known to do this.
886 d_msg_proxy (d_socket.U):
887 This variable conditionally defines the HAS_MSG_PROXY symbol,
888 which indicates that the MSG_PROXY is available. #ifdef is
889 not enough because it may be an enum, glibc has been known to do this.
891 d_msgctl (d_msgctl.U):
892 This variable conditionally defines the HAS_MSGCTL symbol, which
893 indicates to the C program that the msgctl() routine is available.
895 d_msgget (d_msgget.U):
896 This variable conditionally defines the HAS_MSGGET symbol, which
897 indicates to the C program that the msgget() routine is available.
899 d_msgrcv (d_msgrcv.U):
900 This variable conditionally defines the HAS_MSGRCV symbol, which
901 indicates to the C program that the msgrcv() routine is available.
903 d_msgsnd (d_msgsnd.U):
904 This variable conditionally defines the HAS_MSGSND symbol, which
905 indicates to the C program that the msgsnd() routine is available.
907 d_mymalloc (mallocsrc.U):
908 This variable conditionally defines MYMALLOC in case other parts
909 of the source want to take special action if MYMALLOC is used.
910 This may include different sorts of profiling or error detection.
913 This variable conditionally defines the HAS_NICE symbol, which
914 indicates to the C program that the nice() routine is available.
917 This symbol will be defined if the C compiler supports off64_t.
919 d_old_pthread_create_joinable (d_pthrattrj.U):
920 This variable conditionally defines pthread_create_joinable.
921 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
923 d_oldpthreads (usethreads.U):
924 This variable conditionally defines the OLD_PTHREADS_API symbol,
925 and indicates that Perl should be built to use the old
926 draft POSIX threads API. This is only potentially meaningful if
929 d_oldsock (d_socket.U):
930 This variable conditionally defines the OLDSOCKET symbol, which
931 indicates that the BSD socket interface is based on 4.1c and not 4.2.
934 This variable conditionally defines the HAS_OPEN3 manifest constant,
935 which indicates to the C program that the 3 argument version of
936 the open(2) function is available.
938 d_pathconf (d_pathconf.U):
939 This variable conditionally defines the HAS_PATHCONF symbol, which
940 indicates to the C program that the pathconf() routine is available
941 to determine file-system related limits and options associated
942 with a given filename.
945 This variable conditionally defines the HAS_PAUSE symbol, which
946 indicates to the C program that the pause() routine is available
947 to suspend a process until a signal is received.
949 d_phostname (d_gethname.U):
950 This variable conditionally defines the HAS_PHOSTNAME symbol, which
951 contains the shell command which, when fed to popen(), may be
952 used to derive the host name.
955 This variable conditionally defines the HAS_PIPE symbol, which
956 indicates to the C program that the pipe() routine is available
957 to create an inter-process channel.
960 This variable conditionally defines the HAS_POLL symbol, which
961 indicates to the C program that the poll() routine is available
962 to poll active file descriptors.
964 d_portable (d_portable.U):
965 This variable conditionally defines the PORTABLE symbol, which
966 indicates to the C program that it should not assume that it is
967 running on the machine it was compiled on.
969 d_PRId64 (quadfio.U):
970 This variable conditionally defines the PERL_PRId64 symbol, which
971 indiciates that stdio has a symbol to print 64-bit decimal numbers.
973 d_PRIeldbl (longdblfio.U):
974 This variable conditionally defines the PERL_PRIfldlbl symbol, which
975 indiciates that stdio has a symbol to print long doubles.
977 d_PRIEldbl (longdblfio.U):
978 This variable conditionally defines the PERL_PRIfldlbl symbol, which
979 indiciates that stdio has a symbol to print long doubles.
981 d_PRIfldbl (longdblfio.U):
982 This variable conditionally defines the PERL_PRIfldlbl symbol, which
983 indiciates that stdio has a symbol to print long doubles.
985 d_PRIFldbl (longdblfio.U):
986 This variable conditionally defines the PERL_PRIfldlbl symbol, which
987 indiciates that stdio has a symbol to print long doubles.
989 d_PRIgldbl (longdblfio.U):
990 This variable conditionally defines the PERL_PRIfldlbl symbol, which
991 indiciates that stdio has a symbol to print long doubles.
993 d_PRIGldbl (longdblfio.U):
994 This variable conditionally defines the PERL_PRIfldlbl symbol, which
995 indiciates that stdio has a symbol to print long doubles.
997 d_PRIi64 (quadfio.U):
998 This variable conditionally defines the PERL_PRIi64 symbol, which
999 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1001 d_PRIo64 (quadfio.U):
1002 This variable conditionally defines the PERL_PRIo64 symbol, which
1003 indiciates that stdio has a symbol to print 64-bit octal numbers.
1005 d_PRIu64 (quadfio.U):
1006 This variable conditionally defines the PERL_PRIu64 symbol, which
1007 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1010 d_PRIx64 (quadfio.U):
1011 This variable conditionally defines the PERL_PRIx64 symbol, which
1012 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1014 d_PRIX64 (quadfio.U):
1015 This variable conditionally defines the PERL_PRIX64 symbol, which
1016 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1018 d_pthread_yield (d_pthread_y.U):
1019 This variable conditionally defines the HAS_PTHREAD_YIELD
1020 symbol if the pthread_yield routine is available to yield
1021 the execution of the current thread.
1024 This variable conditionally defines PWAGE, which indicates
1025 that struct passwd contains pw_age.
1027 d_pwchange (i_pwd.U):
1028 This variable conditionally defines PWCHANGE, which indicates
1029 that struct passwd contains pw_change.
1031 d_pwclass (i_pwd.U):
1032 This variable conditionally defines PWCLASS, which indicates
1033 that struct passwd contains pw_class.
1035 d_pwcomment (i_pwd.U):
1036 This variable conditionally defines PWCOMMENT, which indicates
1037 that struct passwd contains pw_comment.
1039 d_pwexpire (i_pwd.U):
1040 This variable conditionally defines PWEXPIRE, which indicates
1041 that struct passwd contains pw_expire.
1043 d_pwgecos (i_pwd.U):
1044 This variable conditionally defines PWGECOS, which indicates
1045 that struct passwd contains pw_gecos.
1047 d_pwpasswd (i_pwd.U):
1048 This variable conditionally defines PWPASSWD, which indicates
1049 that struct passwd contains pw_passwd.
1051 d_pwquota (i_pwd.U):
1052 This variable conditionally defines PWQUOTA, which indicates
1053 that struct passwd contains pw_quota.
1055 d_readdir (d_readdir.U):
1056 This variable conditionally defines HAS_READDIR if readdir() is
1057 available to read directory entries.
1059 d_readlink (d_readlink.U):
1060 This variable conditionally defines the HAS_READLINK symbol, which
1061 indicates to the C program that the readlink() routine is available
1062 to read the value of a symbolic link.
1064 d_rename (d_rename.U):
1065 This variable conditionally defines the HAS_RENAME symbol, which
1066 indicates to the C program that the rename() routine is available
1069 d_rewinddir (d_readdir.U):
1070 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1073 d_rmdir (d_rmdir.U):
1074 This variable conditionally defines HAS_RMDIR if rmdir() is
1075 available to remove directories.
1077 d_safebcpy (d_safebcpy.U):
1078 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1079 the bcopy() routine can do overlapping copies.
1081 d_safemcpy (d_safemcpy.U):
1082 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1083 the memcpy() routine can do overlapping copies.
1085 d_sanemcmp (d_sanemcmp.U):
1086 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1087 the memcpy() routine is available and can be used to compare relative
1088 magnitudes of chars with their high bits set.
1090 d_sched_yield (d_pthread_y.U):
1091 This variable conditionally defines the HAS_SCHED_YIELD
1092 symbol if the sched_yield routine is available to yield
1093 the execution of the current thread.
1095 d_scm_rights (d_socket.U):
1096 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1097 which indicates that the SCM_RIGHTS is available. #ifdef is
1098 not enough because it may be an enum, glibc has been known to do this.
1100 d_seekdir (d_readdir.U):
1101 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1104 d_select (d_select.U):
1105 This variable conditionally defines HAS_SELECT if select() is
1106 available to select active file descriptors. A <sys/time.h>
1107 inclusion may be necessary for the timeout field.
1110 This variable conditionally defines the HAS_SEM symbol, which
1111 indicates that the entire sem*(2) library is present.
1113 d_semctl (d_semctl.U):
1114 This variable conditionally defines the HAS_SEMCTL symbol, which
1115 indicates to the C program that the semctl() routine is available.
1117 d_semctl_semid_ds (d_union_semun.U):
1118 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1119 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1121 d_semctl_semun (d_union_semun.U):
1122 This variable conditionally defines USE_SEMCTL_SEMUN, which
1123 indicates that union semun is to be used for semctl IPC_STAT.
1125 d_semget (d_semget.U):
1126 This variable conditionally defines the HAS_SEMGET symbol, which
1127 indicates to the C program that the semget() routine is available.
1129 d_semop (d_semop.U):
1130 This variable conditionally defines the HAS_SEMOP symbol, which
1131 indicates to the C program that the semop() routine is available.
1133 d_setegid (d_setegid.U):
1134 This variable conditionally defines the HAS_SETEGID symbol, which
1135 indicates to the C program that the setegid() routine is available
1136 to change the effective gid of the current program.
1138 d_seteuid (d_seteuid.U):
1139 This variable conditionally defines the HAS_SETEUID symbol, which
1140 indicates to the C program that the seteuid() routine is available
1141 to change the effective uid of the current program.
1143 d_setgrent (d_setgrent.U):
1144 This variable conditionally defines the HAS_SETGRENT symbol, which
1145 indicates to the C program that the setgrent() routine is available
1146 for initializing sequential access to the group database.
1148 d_setgrps (d_setgrps.U):
1149 This variable conditionally defines the HAS_SETGROUPS symbol, which
1150 indicates to the C program that the setgroups() routine is available
1151 to set the list of process groups.
1153 d_sethent (d_sethent.U):
1154 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1157 d_setlinebuf (d_setlnbuf.U):
1158 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1159 indicates to the C program that the setlinebuf() routine is available
1160 to change stderr or stdout from block-buffered or unbuffered to a
1163 d_setlocale (d_setlocale.U):
1164 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1165 available to handle locale-specific ctype implementations.
1167 d_setnent (d_setnent.U):
1168 This variable conditionally defines HAS_SETNETENT if setnetent() is
1171 d_setpent (d_setpent.U):
1172 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1175 d_setpgid (d_setpgid.U):
1176 This variable conditionally defines the HAS_SETPGID symbol if the
1177 setpgid(pid, gpid) function is available to set process group ID.
1179 d_setpgrp2 (d_setpgrp2.U):
1180 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1181 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1182 is available to set the current process group.
1184 d_setpgrp (d_setpgrp.U):
1185 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1186 available to set the current process group.
1188 d_setprior (d_setprior.U):
1189 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1190 is available to set a process's priority.
1192 d_setpwent (d_setpwent.U):
1193 This variable conditionally defines the HAS_SETPWENT symbol, which
1194 indicates to the C program that the setpwent() routine is available
1195 for initializing sequential access to the passwd database.
1197 d_setregid (d_setregid.U):
1198 This variable conditionally defines HAS_SETREGID if setregid() is
1199 available to change the real and effective gid of the current
1202 d_setresgid (d_setregid.U):
1203 This variable conditionally defines HAS_SETRESGID if setresgid() is
1204 available to change the real, effective and saved gid of the current
1207 d_setresuid (d_setreuid.U):
1208 This variable conditionally defines HAS_SETREUID if setresuid() is
1209 available to change the real, effective and saved uid of the current
1212 d_setreuid (d_setreuid.U):
1213 This variable conditionally defines HAS_SETREUID if setreuid() is
1214 available to change the real and effective uid of the current
1217 d_setrgid (d_setrgid.U):
1218 This variable conditionally defines the HAS_SETRGID symbol, which
1219 indicates to the C program that the setrgid() routine is available
1220 to change the real gid of the current program.
1222 d_setruid (d_setruid.U):
1223 This variable conditionally defines the HAS_SETRUID symbol, which
1224 indicates to the C program that the setruid() routine is available
1225 to change the real uid of the current program.
1227 d_setsent (d_setsent.U):
1228 This variable conditionally defines HAS_SETSERVENT if setservent() is
1231 d_setsid (d_setsid.U):
1232 This variable conditionally defines HAS_SETSID if setsid() is
1233 available to set the process group ID.
1235 d_setspent (d_setspent.U):
1236 This variable conditionally defines HAS_SETSPENT if setspent() is
1237 available to initialize the scan of SysV shadow password entries.
1239 d_setvbuf (d_setvbuf.U):
1240 This variable conditionally defines the HAS_SETVBUF symbol, which
1241 indicates to the C program that the setvbuf() routine is available
1242 to change buffering on an open stdio stream.
1245 This variable conditionally defines the USE_SFIO symbol,
1246 and indicates whether sfio is available (and should be used).
1249 This variable conditionally defines the HAS_SHM symbol, which
1250 indicates that the entire shm*(2) library is present.
1252 d_shmat (d_shmat.U):
1253 This variable conditionally defines the HAS_SHMAT symbol, which
1254 indicates to the C program that the shmat() routine is available.
1256 d_shmatprototype (d_shmat.U):
1257 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1258 symbol, which indicates that sys/shm.h has a prototype for
1261 d_shmctl (d_shmctl.U):
1262 This variable conditionally defines the HAS_SHMCTL symbol, which
1263 indicates to the C program that the shmctl() routine is available.
1265 d_shmdt (d_shmdt.U):
1266 This variable conditionally defines the HAS_SHMDT symbol, which
1267 indicates to the C program that the shmdt() routine is available.
1269 d_shmget (d_shmget.U):
1270 This variable conditionally defines the HAS_SHMGET symbol, which
1271 indicates to the C program that the shmget() routine is available.
1273 d_sigaction (d_sigaction.U):
1274 This variable conditionally defines the HAS_SIGACTION symbol, which
1275 indicates that the Vr4 sigaction() routine is available.
1277 d_sigsetjmp (d_sigsetjmp.U):
1278 This variable conditionally defines the HAS_SIGSETJMP symbol,
1279 which indicates that the sigsetjmp() routine is available to
1280 call setjmp() and optionally save the process's signal mask.
1282 d_socket (d_socket.U):
1283 This variable conditionally defines HAS_SOCKET, which indicates
1284 that the BSD socket interface is supported.
1286 d_sockpair (d_socket.U):
1287 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1288 indicates that the BSD socketpair() is supported.
1290 d_sqrtl (d_sqrtl.U):
1291 This variable conditionally defines the HAS_SQRTL symbol, which
1292 indicates to the C program that the sqrtl() routine is available.
1294 d_statblks (d_statblks.U):
1295 This variable conditionally defines USE_STAT_BLOCKS
1296 if this system has a stat structure declaring
1297 st_blksize and st_blocks.
1299 d_statfs_f_flags (d_statfs_f_flags.U):
1300 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1301 symbol, which indicates to struct statfs from has f_flags member.
1302 This kind of struct statfs is coming from sys/mount.h (BSD),
1303 not from sys/statfs.h (SYSV).
1305 d_statfs_s (d_statfs_s.U):
1306 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1307 which indicates that the struct statfs is supported.
1309 d_statvfs (d_statvfs.U):
1310 This variable conditionally defines the HAS_STATVFS symbol, which
1311 indicates to the C program that the statvfs() routine is available.
1313 d_stdio_cnt_lval (d_stdstdio.U):
1314 This variable conditionally defines STDIO_CNT_LVALUE if the
1315 FILE_cnt macro can be used as an lvalue.
1317 d_stdio_ptr_lval (d_stdstdio.U):
1318 This variable conditionally defines STDIO_PTR_LVALUE if the
1319 FILE_ptr macro can be used as an lvalue.
1321 d_stdio_stream_array (stdio_streams.U):
1322 This variable tells whether there is an array holding
1325 d_stdiobase (d_stdstdio.U):
1326 This variable conditionally defines USE_STDIO_BASE if this system
1327 has a FILE structure declaring a usable _base field (or equivalent)
1330 d_stdstdio (d_stdstdio.U):
1331 This variable conditionally defines USE_STDIO_PTR if this system
1332 has a FILE structure declaring usable _ptr and _cnt fields (or
1333 equivalent) in stdio.h.
1335 d_strchr (d_strchr.U):
1336 This variable conditionally defines HAS_STRCHR if strchr() and
1337 strrchr() are available for string searching.
1339 d_strcoll (d_strcoll.U):
1340 This variable conditionally defines HAS_STRCOLL if strcoll() is
1341 available to compare strings using collating information.
1343 d_strctcpy (d_strctcpy.U):
1344 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1345 indicates to the C program that this C compiler knows how to copy
1348 d_strerrm (d_strerror.U):
1349 This variable holds what Strerrr is defined as to translate an error
1350 code condition into an error message string. It could be 'strerror'
1351 or a more complex macro emulating strrror with sys_errlist[], or the
1352 "unknown" string when both strerror and sys_errlist are missing.
1354 d_strerror (d_strerror.U):
1355 This variable conditionally defines HAS_STRERROR if strerror() is
1356 available to translate error numbers to strings.
1358 d_strtod (d_strtod.U):
1359 This variable conditionally defines the HAS_STRTOD symbol, which
1360 indicates to the C program that the strtod() routine is available
1361 to provide better numeric string conversion than atof().
1363 d_strtol (d_strtol.U):
1364 This variable conditionally defines the HAS_STRTOL symbol, which
1365 indicates to the C program that the strtol() routine is available
1366 to provide better numeric string conversion than atoi() and friends.
1368 d_strtoul (d_strtoul.U):
1369 This variable conditionally defines the HAS_STRTOUL symbol, which
1370 indicates to the C program that the strtoul() routine is available
1371 to provide conversion of strings to unsigned long.
1373 d_strtoull (strtoull.U):
1374 This variable conditionally defines the HAS_STRTOULL symbol, which
1375 indicates to the C program that the strtoull() routine is available.
1377 d_strxfrm (d_strxfrm.U):
1378 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1379 available to transform strings.
1381 d_suidsafe (d_dosuid.U):
1382 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1383 if setuid scripts can be secure. This test looks in /dev/fd/.
1385 d_symlink (d_symlink.U):
1386 This variable conditionally defines the HAS_SYMLINK symbol, which
1387 indicates to the C program that the symlink() routine is available
1388 to create symbolic links.
1390 d_syscall (d_syscall.U):
1391 This variable conditionally defines HAS_SYSCALL if syscall() is
1392 available call arbitrary system calls.
1394 d_sysconf (d_sysconf.U):
1395 This variable conditionally defines the HAS_SYSCONF symbol, which
1396 indicates to the C program that the sysconf() routine is available
1397 to determine system related limits and options.
1399 d_sysernlst (d_strerror.U):
1400 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1401 is available to translate error numbers to the symbolic name.
1403 d_syserrlst (d_strerror.U):
1404 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1405 available to translate error numbers to strings.
1407 d_system (d_system.U):
1408 This variable conditionally defines HAS_SYSTEM if system() is
1409 available to issue a shell command.
1411 d_tcgetpgrp (d_tcgtpgrp.U):
1412 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1413 indicates to the C program that the tcgetpgrp() routine is available.
1414 to get foreground process group ID.
1416 d_tcsetpgrp (d_tcstpgrp.U):
1417 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1418 indicates to the C program that the tcsetpgrp() routine is available
1419 to set foreground process group ID.
1421 d_telldir (d_readdir.U):
1422 This variable conditionally defines HAS_TELLDIR if telldir() is
1425 d_telldirproto (d_telldirproto.U):
1426 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1427 which indicates to the C program that the system provides
1428 a prototype for the telldir() function. Otherwise, it is
1429 up to the program to supply one.
1432 This variable conditionally defines the HAS_TIME symbol, which indicates
1433 that the time() routine exists. The time() routine is normaly
1434 provided on UNIX systems.
1436 d_times (d_times.U):
1437 This variable conditionally defines the HAS_TIMES symbol, which indicates
1438 that the times() routine exists. The times() routine is normaly
1439 provided on UNIX systems. You may have to include <sys/times.h>.
1441 d_truncate (d_truncate.U):
1442 This variable conditionally defines HAS_TRUNCATE if truncate() is
1443 available to truncate files.
1445 d_tzname (d_tzname.U):
1446 This variable conditionally defines HAS_TZNAME if tzname[] is
1447 available to access timezone names.
1449 d_umask (d_umask.U):
1450 This variable conditionally defines the HAS_UMASK symbol, which
1451 indicates to the C program that the umask() routine is available.
1452 to set and get the value of the file creation mask.
1454 d_uname (d_gethname.U):
1455 This variable conditionally defines the HAS_UNAME symbol, which
1456 indicates to the C program that the uname() routine may be
1457 used to derive the host name.
1459 d_union_semun (d_union_semun.U):
1460 This variable conditionally defines HAS_UNION_SEMUN if the
1461 union semun is defined by including <sys/sem.h>.
1463 d_ustat (d_ustat.U):
1464 This variable conditionally defines HAS_USTAT if ustat() is
1465 available to query file system statistics by dev_t.
1467 d_vendorbin (vendorbin.U):
1468 This variable conditionally defines PERL_VENDORBIN.
1470 d_vendorlib (vendorlib.U):
1471 This variable conditionally defines PERL_VENDORLIB.
1473 d_vfork (d_vfork.U):
1474 This variable conditionally defines the HAS_VFORK symbol, which
1475 indicates the vfork() routine is available.
1477 d_void_closedir (d_closedir.U):
1478 This variable conditionally defines VOID_CLOSEDIR if closedir()
1479 does not return a value.
1481 d_voidsig (d_voidsig.U):
1482 This variable conditionally defines VOIDSIG if this system
1483 declares "void (*signal(...))()" in signal.h. The old way was to
1484 declare it as "int (*signal(...))()".
1486 d_voidtty (i_sysioctl.U):
1487 This variable conditionally defines USE_IOCNOTTY to indicate that the
1488 ioctl() call with TIOCNOTTY should be used to void tty association.
1489 Otherwise (on USG probably), it is enough to close the standard file
1490 decriptors and do a setpgrp().
1492 d_volatile (d_volatile.U):
1493 This variable conditionally defines the HASVOLATILE symbol, which
1494 indicates to the C program that this C compiler knows about the
1495 volatile declaration.
1497 d_vprintf (d_vprintf.U):
1498 This variable conditionally defines the HAS_VPRINTF symbol, which
1499 indicates to the C program that the vprintf() routine is available
1500 to printf with a pointer to an argument list.
1502 d_wait4 (d_wait4.U):
1503 This variable conditionally defines the HAS_WAIT4 symbol, which
1504 indicates the wait4() routine is available.
1506 d_waitpid (d_waitpid.U):
1507 This variable conditionally defines HAS_WAITPID if waitpid() is
1508 available to wait for child process.
1510 d_wcstombs (d_wcstombs.U):
1511 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1512 indicates to the C program that the wcstombs() routine is available
1513 to convert wide character strings to multibyte strings.
1515 d_wctomb (d_wctomb.U):
1516 This variable conditionally defines the HAS_WCTOMB symbol, which
1517 indicates to the C program that the wctomb() routine is available
1518 to convert a wide character to a multibyte.
1521 This variable conditionally defines the symbol XENIX, which alerts
1522 the C program that it runs under Xenix.
1525 This variable is used internally by Configure to determine the
1526 full pathname (if any) of the date program. After Configure runs,
1527 the value is reset to a plain "date" and is not useful.
1529 db_hashtype (i_db.U):
1530 This variable contains the type of the hash structure element
1531 in the <db.h> header file. In older versions of DB, it was
1532 int, while in newer ones it is u_int32_t.
1534 db_prefixtype (i_db.U):
1535 This variable contains the type of the prefix structure element
1536 in the <db.h> header file. In older versions of DB, it was
1537 int, while in newer ones it is size_t.
1539 defvoidused (voidflags.U):
1540 This variable contains the default value of the VOIDUSED symbol (15).
1542 direntrytype (i_dirent.U):
1543 This symbol is set to 'struct direct' or 'struct dirent' depending on
1544 whether dirent is available or not. You should use this pseudo type to
1545 portably declare your directory entries.
1548 This variable contains the extension that is to be used for the
1549 dynamically loaded modules that perl generaties.
1552 This variable contains the name of the dynamic loading file that
1553 will be used with the package.
1555 doublesize (doublesize.U):
1556 This variable contains the value of the DOUBLESIZE symbol, which
1557 indicates to the C program how many bytes there are in a double.
1559 drand01 (randfunc.U):
1560 Indicates the macro to be used to generate normalized
1561 random numbers. Uses randfunc, often divided by
1562 (double) (((unsigned long) 1 << randbits)) in order to
1563 normalize the result.
1564 In C programs, the macro 'Drand01' is mapped to drand01.
1566 dynamic_ext (Extensions.U):
1567 This variable holds a list of XS extension files we want to
1568 link dynamically into the package. It is used by Makefile.
1570 eagain (nblock_io.U):
1571 This variable bears the symbolic errno code set by read() when no
1572 data is present on the file and non-blocking I/O was enabled (otherwise,
1573 read() blocks naturally).
1576 This variable conditionally defines EBCDIC if this
1577 system uses EBCDIC encoding. Among other things, this
1578 means that the character ranges are not contiguous.
1582 This variable is used internally by Configure to determine the
1583 full pathname (if any) of the echo program. After Configure runs,
1584 the value is reset to a plain "echo" and is not useful.
1587 This variable is used internally by Configure to determine the
1588 full pathname (if any) of the egrep program. After Configure runs,
1589 the value is reset to a plain "egrep" and is not useful.
1592 This variable is defined but not used by Configure.
1593 The value is a plain '' and is not useful.
1596 When running under Eunice this variable contains a command which will
1597 convert a shell script to the proper form of text file for it to be
1598 executable by the shell. On other systems it is a no-op.
1601 This is an old synonym for _exe.
1604 This variable is used internally by Configure to determine the
1605 full pathname (if any) of the expr program. After Configure runs,
1606 the value is reset to a plain "expr" and is not useful.
1608 extensions (Extensions.U):
1609 This variable holds a list of all extension files (both XS and
1610 non-xs linked into the package. It is propagated to Config.pm
1611 and is typically used to test whether a particular extesion
1614 fflushall (fflushall.U):
1615 This symbol, if defined, tells that to flush
1616 all pending stdio output one must loop through all
1617 the stdio file handles stored in an array and fflush them.
1618 Note that if fflushNULL is defined, fflushall will not
1619 even be probed for and will be left undefined.
1621 fflushNULL (fflushall.U):
1622 This symbol, if defined, tells that fflush(NULL) does flush
1623 all pending stdio output.
1626 This variable is defined but not used by Configure.
1627 The value is a plain '' and is not useful.
1629 firstmakefile (Unix.U):
1630 This variable defines the first file searched by make. On unix,
1631 it is makefile (then Makefile). On case-insensitive systems,
1632 it might be something else. This is only used to deal with
1633 convoluted make depend tricks.
1636 This variable is defined but not used by Configure.
1637 The value is a plain '' and is not useful.
1639 fpostype (fpostype.U):
1640 This variable defines Fpos_t to be something like fpost_t, long,
1641 uint, or whatever type is used to declare file positions in libc.
1643 freetype (mallocsrc.U):
1644 This variable contains the return type of free(). It is usually
1645 void, but occasionally int.
1648 This variable contains the full pathname to 'ar', whether or
1649 not the user has specified 'portability'. This is only used
1653 This variable contains the full pathname to 'csh', whether or
1654 not the user has specified 'portability'. This is only used
1655 in the compiled C program, and we assume that all systems which
1656 can share this executable will have the same full pathname to
1659 full_sed (Loc_sed.U):
1660 This variable contains the full pathname to 'sed', whether or
1661 not the user has specified 'portability'. This is only used
1662 in the compiled C program, and we assume that all systems which
1663 can share this executable will have the same full pathname to
1667 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1668 indicate whether the compiler is version 1 or 2. This is used in
1669 setting some of the default cflags. It is set to '' if not gcc.
1671 gidtype (gidtype.U):
1672 This variable defines Gid_t to be something like gid_t, int,
1673 ushort, or whatever type is used to declare the return type
1674 of getgid(). Typically, it is the type of group ids in the kernel.
1677 This variable holds the general path (space-separated) used to
1678 find libraries. It may contain directories that do not exist on
1679 this platform, libpth is the cleaned-up version.
1682 This variable is used internally by Configure to determine the
1683 full pathname (if any) of the grep program. After Configure runs,
1684 the value is reset to a plain "grep" and is not useful.
1687 This variable contains a command that produces the text of the
1688 /etc/group file. This is normally "cat /etc/group", but can be
1689 "ypcat group" when NIS is used.
1691 groupstype (groupstype.U):
1692 This variable defines Groups_t to be something like gid_t, int,
1693 ushort, or whatever type is used for the second argument to
1694 getgroups() and setgroups(). Usually, this is the same as
1695 gidtype (gid_t), but sometimes it isn't.
1698 This variable is used internally by Configure to determine the
1699 full pathname (if any) of the gzip program. After Configure runs,
1700 the value is reset to a plain "gzip" and is not useful.
1702 h_fcntl (h_fcntl.U):
1703 This is variable gets set in various places to tell i_fcntl that
1704 <fcntl.h> should be included.
1706 h_sysfile (h_sysfile.U):
1707 This is variable gets set in various places to tell i_sys_file that
1708 <sys/file.h> should be included.
1711 Gives the type of hints used for previous answers. May be one of
1712 "default", "recommended" or "previous".
1715 This variable contains a command that produces the text of the
1716 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1717 "ypcat hosts" when NIS is used.
1720 This variable contains a flag which will tell the C compiler and loader
1721 to produce a program running with a huge memory model. If the
1722 huge model is not supported, contains the flag to produce large
1723 model programs. It is up to the Makefile to use this.
1725 i_arpainet (i_arpainet.U):
1726 This variable conditionally defines the I_ARPA_INET symbol,
1727 and indicates whether a C program should include <arpa/inet.h>.
1729 i_bsdioctl (i_sysioctl.U):
1730 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1731 indicates to the C program that <sys/bsdioctl.h> exists and should
1735 This variable conditionally defines the I_DB symbol, and indicates
1736 whether a C program may include Berkeley's DB include file <db.h>.
1739 This variable conditionally defines the I_DBM symbol, which
1740 indicates to the C program that <dbm.h> exists and should
1743 i_dirent (i_dirent.U):
1744 This variable conditionally defines I_DIRENT, which indicates
1745 to the C program that it should include <dirent.h>.
1748 This variable conditionally defines the I_DLD symbol, which
1749 indicates to the C program that <dld.h> (GNU dynamic loading)
1750 exists and should be included.
1752 i_dlfcn (i_dlfcn.U):
1753 This variable conditionally defines the I_DLFCN symbol, which
1754 indicates to the C program that <dlfcn.h> exists and should
1757 i_fcntl (i_fcntl.U):
1758 This variable controls the value of I_FCNTL (which tells
1759 the C program to include <fcntl.h>).
1761 i_float (i_float.U):
1762 This variable conditionally defines the I_FLOAT symbol, and indicates
1763 whether a C program may include <float.h> to get symbols like DBL_MAX
1764 or DBL_MIN, i.e. machine dependent floating point values.
1767 This variable conditionally defines the I_GDBM symbol, which
1768 indicates to the C program that <gdbm.h> exists and should
1772 This variable conditionally defines the I_GRP symbol, and indicates
1773 whether a C program should include <grp.h>.
1775 i_inttypes (i_inttypes.U):
1776 This variable conditionally defines the I_INTTYPES symbol,
1777 and indicates whether a C program should include <inttypes.h>.
1779 i_limits (i_limits.U):
1780 This variable conditionally defines the I_LIMITS symbol, and indicates
1781 whether a C program may include <limits.h> to get symbols like WORD_BIT
1784 i_locale (i_locale.U):
1785 This variable conditionally defines the I_LOCALE symbol,
1786 and indicates whether a C program should include <locale.h>.
1788 i_machcthr (i_machcthr.U):
1789 This variable conditionally defines the I_MACH_CTHREADS symbol,
1790 and indicates whether a C program should include <mach/cthreads.h>.
1792 i_malloc (i_malloc.U):
1793 This variable conditionally defines the I_MALLOC symbol, and indicates
1794 whether a C program should include <malloc.h>.
1797 This variable conditionally defines the I_MATH symbol, and indicates
1798 whether a C program may include <math.h>.
1800 i_memory (i_memory.U):
1801 This variable conditionally defines the I_MEMORY symbol, and indicates
1802 whether a C program should include <memory.h>.
1804 i_mntent (i_mntent.U):
1805 This variable conditionally defines the I_MNTENT symbol, and indicates
1806 whether a C program should include <mntent.h>.
1809 This variable conditionally defines the I_NDBM symbol, which
1810 indicates to the C program that <ndbm.h> exists and should
1813 i_netdb (i_netdb.U):
1814 This variable conditionally defines the I_NETDB symbol, and indicates
1815 whether a C program should include <netdb.h>.
1817 i_neterrno (i_neterrno.U):
1818 This variable conditionally defines the I_NET_ERRNO symbol, which
1819 indicates to the C program that <net/errno.h> exists and should
1822 i_netinettcp (i_netinettcp.U):
1823 This variable conditionally defines the I_NETINET_TCP symbol,
1824 and indicates whether a C program should include <netinet/tcp.h>.
1827 This variable conditionally defines I_NETINET_IN, which indicates
1828 to the C program that it should include <netinet/in.h>. Otherwise,
1829 you may try <sys/in.h>.
1832 This variable conditionally defines the I_POLL symbol, and indicates
1833 whether a C program should include <poll.h>.
1835 i_pthread (i_pthread.U):
1836 This variable conditionally defines the I_PTHREAD symbol,
1837 and indicates whether a C program should include <pthread.h>.
1840 This variable conditionally defines I_PWD, which indicates
1841 to the C program that it should include <pwd.h>.
1843 i_rpcsvcdbm (i_dbm.U):
1844 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1845 indicates to the C program that <rpcsvc/dbm.h> exists and should
1846 be included. Some System V systems might need this instead of <dbm.h>.
1849 This variable conditionally defines the I_SFIO symbol,
1850 and indicates whether a C program should include <sfio.h>.
1852 i_sgtty (i_termio.U):
1853 This variable conditionally defines the I_SGTTY symbol, which
1854 indicates to the C program that it should include <sgtty.h> rather
1857 i_shadow (i_shadow.U):
1858 This variable conditionally defines the I_SHADOW symbol, and indicates
1859 whether a C program should include <shadow.h>.
1861 i_socks (i_socks.U):
1862 This variable conditionally defines the I_SOCKS symbol, and indicates
1863 whether a C program should include <socks.h>.
1865 i_stdarg (i_varhdr.U):
1866 This variable conditionally defines the I_STDARG symbol, which
1867 indicates to the C program that <stdarg.h> exists and should
1870 i_stddef (i_stddef.U):
1871 This variable conditionally defines the I_STDDEF symbol, which
1872 indicates to the C program that <stddef.h> exists and should
1875 i_stdlib (i_stdlib.U):
1876 This variable conditionally defines the I_STDLIB symbol, which
1877 indicates to the C program that <stdlib.h> exists and should
1880 i_string (i_string.U):
1881 This variable conditionally defines the I_STRING symbol, which
1882 indicates that <string.h> should be included rather than <strings.h>.
1884 i_sysaccess (i_sysaccess.U):
1885 This variable conditionally defines the I_SYS_ACCESS symbol,
1886 and indicates whether a C program should include <sys/access.h>.
1888 i_sysdir (i_sysdir.U):
1889 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1890 whether a C program should include <sys/dir.h>.
1892 i_sysfile (i_sysfile.U):
1893 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1894 whether a C program should include <sys/file.h> to get R_OK and friends.
1896 i_sysfilio (i_sysioctl.U):
1897 This variable conditionally defines the I_SYS_FILIO symbol, which
1898 indicates to the C program that <sys/filio.h> exists and should
1899 be included in preference to <sys/ioctl.h>.
1902 This variable conditionally defines I_SYS_IN, which indicates
1903 to the C program that it should include <sys/in.h> instead of
1906 i_sysioctl (i_sysioctl.U):
1907 This variable conditionally defines the I_SYS_IOCTL symbol, which
1908 indicates to the C program that <sys/ioctl.h> exists and should
1911 i_sysmount (i_sysmount.U):
1912 This variable conditionally defines the I_SYSMOUNT symbol,
1913 and indicates whether a C program should include <sys/mount.h>.
1915 i_sysndir (i_sysndir.U):
1916 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1917 whether a C program should include <sys/ndir.h>.
1919 i_sysparam (i_sysparam.U):
1920 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1921 whether a C program should include <sys/param.h>.
1923 i_sysresrc (i_sysresrc.U):
1924 This variable conditionally defines the I_SYS_RESOURCE symbol,
1925 and indicates whether a C program should include <sys/resource.h>.
1927 i_syssecrt (i_syssecrt.U):
1928 This variable conditionally defines the I_SYS_SECURITY symbol,
1929 and indicates whether a C program should include <sys/security.h>.
1931 i_sysselct (i_sysselct.U):
1932 This variable conditionally defines I_SYS_SELECT, which indicates
1933 to the C program that it should include <sys/select.h> in order to
1934 get the definition of struct timeval.
1936 i_syssockio (i_sysioctl.U):
1937 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1938 C program that socket ioctl codes may be found in <sys/sockio.h>
1939 instead of <sys/ioctl.h>.
1941 i_sysstat (i_sysstat.U):
1942 This variable conditionally defines the I_SYS_STAT symbol,
1943 and indicates whether a C program should include <sys/stat.h>.
1945 i_sysstatfs (i_sysstatfs.U):
1946 This variable conditionally defines the I_SYSSTATFS symbol,
1947 and indicates whether a C program should include <sys/statfs.h>.
1949 i_sysstatvfs (i_sysstatvfs.U):
1950 This variable conditionally defines the I_SYSSTATVFS symbol,
1951 and indicates whether a C program should include <sys/statvfs.h>.
1953 i_systime (i_time.U):
1954 This variable conditionally defines I_SYS_TIME, which indicates
1955 to the C program that it should include <sys/time.h>.
1957 i_systimek (i_time.U):
1958 This variable conditionally defines I_SYS_TIME_KERNEL, which
1959 indicates to the C program that it should include <sys/time.h>
1960 with KERNEL defined.
1962 i_systimes (i_systimes.U):
1963 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1964 whether a C program should include <sys/times.h>.
1966 i_systypes (i_systypes.U):
1967 This variable conditionally defines the I_SYS_TYPES symbol,
1968 and indicates whether a C program should include <sys/types.h>.
1970 i_sysuio (i_sysuio.U):
1971 This variable conditionally defines the I_SYSUIO symbol, and indicates
1972 whether a C program should include <sys/uio.h>.
1974 i_sysun (i_sysun.U):
1975 This variable conditionally defines I_SYS_UN, which indicates
1976 to the C program that it should include <sys/un.h> to get UNIX
1977 domain socket definitions.
1979 i_sysvfs (i_sysvfs.U):
1980 This variable conditionally defines the I_SYSVFS symbol,
1981 and indicates whether a C program should include <sys/vfs.h>.
1983 i_syswait (i_syswait.U):
1984 This variable conditionally defines I_SYS_WAIT, which indicates
1985 to the C program that it should include <sys/wait.h>.
1987 i_termio (i_termio.U):
1988 This variable conditionally defines the I_TERMIO symbol, which
1989 indicates to the C program that it should include <termio.h> rather
1992 i_termios (i_termio.U):
1993 This variable conditionally defines the I_TERMIOS symbol, which
1994 indicates to the C program that the POSIX <termios.h> file is
1998 This variable conditionally defines I_TIME, which indicates
1999 to the C program that it should include <time.h>.
2001 i_unistd (i_unistd.U):
2002 This variable conditionally defines the I_UNISTD symbol, and indicates
2003 whether a C program should include <unistd.h>.
2005 i_ustat (i_ustat.U):
2006 This variable conditionally defines the I_USTAT symbol, and indicates
2007 whether a C program should include <ustat.h>.
2009 i_utime (i_utime.U):
2010 This variable conditionally defines the I_UTIME symbol, and indicates
2011 whether a C program should include <utime.h>.
2013 i_values (i_values.U):
2014 This variable conditionally defines the I_VALUES symbol, and indicates
2015 whether a C program may include <values.h> to get symbols like MAXLONG
2018 i_varargs (i_varhdr.U):
2019 This variable conditionally defines I_VARARGS, which indicates
2020 to the C program that it should include <varargs.h>.
2022 i_varhdr (i_varhdr.U):
2023 Contains the name of the header to be included to get va_dcl definition.
2024 Typically one of varargs.h or stdarg.h.
2026 i_vfork (i_vfork.U):
2027 This variable conditionally defines the I_VFORK symbol, and indicates
2028 whether a C program should include vfork.h.
2030 ignore_versioned_solibs (libs.U):
2031 This variable should be non-empty if non-versioned shared
2032 libraries (libfoo.so.x.y) are to be ignored (because they
2033 cannot be linked against).
2036 This variable must preceed the normal include path to get hte
2037 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2038 Value can be "" or "/bsd43" on mips.
2041 This variable is defined but not used by Configure.
2042 The value is a plain '' and is not useful.
2044 installarchlib (archlib.U):
2045 This variable is really the same as archlibexp but may differ on
2046 those systems using AFS. For extra portability, only this variable
2047 should be used in makefiles.
2050 This variable is the same as binexp unless AFS is running in which case
2051 the user is explicitely prompted for it. This variable should always
2052 be used in your makefiles for maximum portability.
2054 installman1dir (man1dir.U):
2055 This variable is really the same as man1direxp, unless you are using
2056 AFS in which case it points to the read/write location whereas
2057 man1direxp only points to the read-only access location. For extra
2058 portability, you should only use this variable within your makefiles.
2060 installman3dir (man3dir.U):
2061 This variable is really the same as man3direxp, unless you are using
2062 AFS in which case it points to the read/write location whereas
2063 man3direxp only points to the read-only access location. For extra
2064 portability, you should only use this variable within your makefiles.
2066 installprefix (installprefix.U):
2067 This variable holds the name of the directory below which
2068 "make install" will install the package. For most users, this
2069 is the same as prefix. However, it is useful for
2070 installing the software into a different (usually temporary)
2071 location after which it can be bundled up and moved somehow
2072 to the final location specified by prefix.
2074 installprefixexp (installprefix.U):
2075 This variable holds the full absolute path of installprefix
2076 with all ~-expansion done.
2078 installprivlib (privlib.U):
2079 This variable is really the same as privlibexp but may differ on
2080 those systems using AFS. For extra portability, only this variable
2081 should be used in makefiles.
2083 installscript (scriptdir.U):
2084 This variable is usually the same as scriptdirexp, unless you are on
2085 a system running AFS, in which case they may differ slightly. You
2086 should always use this variable within your makefiles for portability.
2088 installsitearch (sitearch.U):
2089 This variable is really the same as sitearchexp but may differ on
2090 those systems using AFS. For extra portability, only this variable
2091 should be used in makefiles.
2093 installsitebin (sitebin.U):
2094 This variable is usually the same as sitebinexp, unless you are on
2095 a system running AFS, in which case they may differ slightly. You
2096 should always use this variable within your makefiles for portability.
2098 installsitelib (sitelib.U):
2099 This variable is really the same as sitelibexp but may differ on
2100 those systems using AFS. For extra portability, only this variable
2101 should be used in makefiles.
2103 installstyle (installstyle.U):
2104 This variable describes the "style" of the perl installation.
2105 This is intended to be useful for tools that need to
2106 manipulate entire perl distributions. Perl itself doesn't use
2107 this to find its libraries -- the library directories are
2108 stored directly in Config.pm. Currently, there are only two
2109 styles: "lib" and "lib/perl5". The default library locations
2110 (e.g. privlib, sitelib) are either $prefix/lib or
2111 $prefix/lib/perl5. The former is useful if $prefix is a
2112 directory dedicated to perl (e.g. /opt/perl), while the latter
2113 is useful if $prefix is shared by many packages, e.g. if
2115 This may later be extended to include other information, so
2116 be careful with pattern-matching on the results.
2117 For compatibility with perl5.005 and earlier, the default
2118 setting is based on whether or not $prefix contains the string
2121 installusrbinperl (instubperl.U):
2122 This variable tells whether Perl should be installed also as
2123 /usr/bin/perl in addition to
2126 installvendorbin (vendorbin.U):
2127 This variable is really the same as vendorbinexp but may differ on
2128 those systems using AFS. For extra portability, only this variable
2129 should be used in makefiles.
2131 installvendorlib (vendorlib.U):
2132 This variable is really the same as vendorlibexp but may differ on
2133 those systems using AFS. For extra portability, only this variable
2134 should be used in makefiles.
2136 intsize (intsize.U):
2137 This variable contains the value of the INTSIZE symbol, which
2138 indicates to the C program how many bytes there are in an int.
2140 known_extensions (Extensions.U):
2141 This variable holds a list of all XS extensions included in
2145 This variable is defined but not used by Configure.
2146 The value is a plain '' and is not useful.
2149 This variable contains a flag which will tell the C compiler and loader
2150 to produce a program running with a large memory model. It is up to
2151 the Makefile to use this.
2154 This variable indicates the program to be used to link
2155 libraries for dynamic loading. On some systems, it is 'ld'.
2156 On ELF systems, it should be $cc. Mostly, we'll try to respect
2157 the hint file setting.
2159 lddlflags (dlsrc.U):
2160 This variable contains any special flags that might need to be
2161 passed to $ld to create a shared library suitable for dynamic
2162 loading. It is up to the makefile to use it. For hpux, it
2163 should be '-b'. For sunos 4.1, it is empty.
2165 ldflags (ccflags.U):
2166 This variable contains any additional C loader flags desired by
2167 the user. It is up to the Makefile to use this.
2169 ldlibpthname (libperl.U):
2170 This variable holds the name of the shared library
2171 search path, often LD_LIBRARY_PATH. To get an empty
2172 string, the hints file must set this to 'none'.
2175 This variable is used internally by Configure to determine the
2176 full pathname (if any) of the less program. After Configure runs,
2177 the value is reset to a plain "less" and is not useful.
2180 This is an old synonym for _a.
2183 This variable contains the location of the C library.
2185 libperl (libperl.U):
2186 The perl executable is obtained by linking perlmain.c with
2187 libperl, any static extensions (usually just DynaLoader),
2188 and any other libraries needed on this system. libperl
2189 is usually libperl.a, but can also be libperl.so.xxx if
2190 the user wishes to build a perl executable with a shared
2194 This variable holds the general path (space-separated) used to find
2195 libraries. It is intended to be used by other units.
2198 This variable holds the additional libraries we want to use.
2199 It is up to the Makefile to deal with it.
2201 libswanted (Myinit.U):
2202 This variable holds a list of all the libraries we want to
2203 search. The order is chosen to pick up the c library
2204 ahead of ucb or bsd libraries for SVR4.
2207 This variable is defined but not used by Configure.
2208 The value is a plain '' and is not useful.
2211 This variable is defined but not used by Configure.
2212 The value is a plain '' and is not useful.
2214 lkflags (ccflags.U):
2215 This variable contains any additional C partial linker flags desired by
2216 the user. It is up to the Makefile to use this.
2219 This variable is used internally by Configure to determine the
2220 full pathname (if any) of the ln program. After Configure runs,
2221 the value is reset to a plain "ln" and is not useful.
2224 This variable holds the name of the command to make
2225 symbolic links (if they are supported). It can be used
2226 in the Makefile. It is either 'ln -s' or 'ln'
2228 locincpth (ccflags.U):
2229 This variable contains a list of additional directories to be
2230 searched by the compiler. The appropriate '-I' directives will
2231 be added to ccflags. This is intended to simplify setting
2232 local directories from the Configure command line.
2233 It's not much, but it parallels the loclibpth stuff in libpth.U.
2235 loclibpth (libpth.U):
2236 This variable holds the paths (space-separated) used to find local
2237 libraries. It is prepended to libpth, and is intended to be easily
2238 set from the command line.
2240 longdblsize (d_longdbl.U):
2241 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2242 indicates to the C program how many bytes there are in a long double,
2243 if this system supports long doubles.
2245 longlongsize (d_longlong.U):
2246 This variable contains the value of the LONGLONGSIZE symbol, which
2247 indicates to the C program how many bytes there are in a long long,
2248 if this system supports long long.
2250 longsize (intsize.U):
2251 This variable contains the value of the LONGSIZE symbol, which
2252 indicates to the C program how many bytes there are in a long.
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.
2263 This variable is used internally by Configure to determine the
2264 full pathname (if any) of the ls program. After Configure runs,
2265 the value is reset to a plain "ls" and is not useful.
2267 lseeksize (lseektype.U):
2268 This variable defines lseektype to be something like off_t, long,
2269 or whatever type is used to declare lseek offset's type in the
2270 kernel (which also appears to be lseek's return type).
2272 lseektype (lseektype.U):
2273 This variable defines lseektype to be something like off_t, long,
2274 or whatever type is used to declare lseek offset's type in the
2275 kernel (which also appears to be lseek's return type).
2278 This variable is defined but not used by Configure.
2279 The value is a plain '' and is not useful.
2282 This variable is defined but not used by Configure.
2283 The value is a plain '' and is not useful.
2286 This variable is used internally by Configure to determine the
2287 full pathname (if any) of the make program. After Configure runs,
2288 the value is reset to a plain "make" and is not useful.
2290 make_set_make (make.U):
2291 Some versions of 'make' set the variable MAKE. Others do not.
2292 This variable contains the string to be included in Makefile.SH
2293 so that MAKE is set if needed, and not if not needed.
2294 Possible values are:
2295 make_set_make='#' # If your make program handles this for you,
2296 make_set_make="MAKE=$make" # if it doesn't.
2297 I used a comment character so that we can distinguish a
2298 'set' value (from a previous config.sh or Configure '-D' option)
2299 from an uncomputed value.
2301 mallocobj (mallocsrc.U):
2302 This variable contains the name of the malloc.o that this package
2303 generates, if that malloc.o is preferred over the system malloc.
2304 Otherwise the value is null. This variable is intended for generating
2305 Makefiles. See mallocsrc.
2307 mallocsrc (mallocsrc.U):
2308 This variable contains the name of the malloc.c that comes with
2309 the package, if that malloc.c is preferred over the system malloc.
2310 Otherwise the value is null. This variable is intended for generating
2313 malloctype (mallocsrc.U):
2314 This variable contains the kind of ptr returned by malloc and realloc.
2316 man1dir (man1dir.U):
2317 This variable contains the name of the directory in which manual
2318 source pages are to be put. It is the responsibility of the
2319 Makefile.SH to get the value of this into the proper command.
2320 You must be prepared to do the ~name expansion yourself.
2322 man1direxp (man1dir.U):
2323 This variable is the same as the man1dir variable, but is filename
2324 expanded at configuration time, for convenient use in makefiles.
2326 man1ext (man1dir.U):
2327 This variable contains the extension that the manual page should
2328 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2331 man3dir (man3dir.U):
2332 This variable contains the name of the directory in which manual
2333 source pages are to be put. It is the responsibility of the
2334 Makefile.SH to get the value of this into the proper command.
2335 You must be prepared to do the ~name expansion yourself.
2337 man3direxp (man3dir.U):
2338 This variable is the same as the man3dir variable, but is filename
2339 expanded at configuration time, for convenient use in makefiles.
2341 man3ext (man3dir.U):
2342 This variable contains the extension that the manual page should
2343 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2347 This variable is used internally by Configure to determine the
2348 full pathname (if any) of the Mcc program. After Configure runs,
2349 the value is reset to a plain "Mcc" and is not useful.
2352 This variable contains a flag which will tell the C compiler and loader
2353 to produce a program running with a medium memory model. If the
2354 medium model is not supported, contains the flag to produce large
2355 model programs. It is up to the Makefile to use this.
2357 mips_type (usrinc.U):
2358 This variable holds the environment type for the mips system.
2359 Possible values are "BSD 4.3" and "System V".
2362 This variable is used internally by Configure to determine the
2363 full pathname (if any) of the mkdir program. After Configure runs,
2364 the value is reset to a plain "mkdir" and is not useful.
2367 This variable contains the list of memory models supported by this
2368 system. Possible component values are none, split, unsplit, small,
2369 medium, large, and huge. The component values are space separated.
2371 modetype (modetype.U):
2372 This variable defines modetype to be something like mode_t,
2373 int, unsigned short, or whatever type is used to declare file
2374 modes for system calls.
2377 This variable is used internally by Configure to determine the
2378 full pathname (if any) of the more program. After Configure runs,
2379 the value is reset to a plain "more" and is not useful.
2381 multiarch (multiarch.U):
2382 This variable conditionally defines the MULTIARCH symbol
2383 which signifies the presence of multiplatform files.
2384 This is normally set by hints files.
2387 This variable is defined but not used by Configure.
2388 The value is a plain '' and is not useful.
2390 myarchname (archname.U):
2391 This variable holds the architecture name computed by Configure in
2392 a previous run. It is not intended to be perused by any user and
2393 should never be set in a hint file.
2395 mydomain (myhostname.U):
2396 This variable contains the eventual value of the MYDOMAIN symbol,
2397 which is the domain of the host the program is going to run on.
2398 The domain must be appended to myhostname to form a complete host name.
2399 The dot comes with mydomain, and need not be supplied by the program.
2401 myhostname (myhostname.U):
2402 This variable contains the eventual value of the MYHOSTNAME symbol,
2403 which is the name of the host the program is going to run on.
2404 The domain is not kept with hostname, but must be gotten from mydomain.
2405 The dot comes with mydomain, and need not be supplied by the program.
2407 myuname (Oldconfig.U):
2408 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2409 pseudo variables assignments in the output are stripped, thank you. The
2410 whole thing is then lower-cased.
2413 This variable contains the '-n' flag if that is what causes the echo
2414 command to suppress newline. Otherwise it is null. Correct usage is
2415 $echo $n "prompt for a question: $c".
2417 netdb_hlen_type (netdbtype.U):
2418 This variable holds the type used for the 2nd argument to
2419 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2420 This is only useful if you have gethostbyaddr(), naturally.
2422 netdb_host_type (netdbtype.U):
2423 This variable holds the type used for the 1st argument to
2424 gethostbyaddr(). Usually, this is char * or void *, possibly
2425 with or without a const prefix.
2426 This is only useful if you have gethostbyaddr(), naturally.
2428 netdb_name_type (netdbtype.U):
2429 This variable holds the type used for the argument to
2430 gethostbyname(). Usually, this is char * or const char *.
2431 This is only useful if you have gethostbyname(), naturally.
2433 netdb_net_type (netdbtype.U):
2434 This variable holds the type used for the 1st argument to
2435 getnetbyaddr(). Usually, this is int or long.
2436 This is only useful if you have getnetbyaddr(), naturally.
2439 This variable is used internally by Configure to determine the
2440 full pathname (if any) of the nm program. After Configure runs,
2441 the value is reset to a plain "nm" and is not useful.
2444 This variable holds the options that may be necessary for nm.
2446 nm_so_opt (usenm.U):
2447 This variable holds the options that may be necessary for nm
2448 to work on a shared library but that can not be used on an
2449 archive library. Currently, this is only used by Linux, where
2450 nm --dynamic is *required* to get symbols from an ELF library which
2451 has been stripped, but nm --dynamic is *fatal* on an archive library.
2452 Maybe Linux should just always set usenm=false.
2454 nonxs_ext (Extensions.U):
2455 This variable holds a list of all non-xs extensions included
2456 in the package. All of them will be built.
2459 This variable is used internally by Configure to determine the
2460 full pathname (if any) of the nroff program. After Configure runs,
2461 the value is reset to a plain "nroff" and is not useful.
2463 o_nonblock (nblock_io.U):
2464 This variable bears the symbol value to be used during open() or fcntl()
2465 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2466 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2467 but that is only supported by some devices.
2470 This is an old synonym for _o.
2472 old_pthread_create_joinable (d_pthrattrj.U):
2473 This variable defines the constant to use for creating joinable
2474 (aka undetached) pthreads. Unused if pthread.h defines
2475 PTHREAD_CREATE_JOINABLE. If used, possible values are
2476 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2478 optimize (ccflags.U):
2479 This variable contains any optimizer/debugger flag that should be used.
2480 It is up to the Makefile to use it.
2482 orderlib (orderlib.U):
2483 This variable is "true" if the components of libraries must be ordered
2484 (with `lorder $* | tsort`) before placing them in an archive. Set to
2485 "false" if ranlib or ar can generate random libraries.
2487 osname (Oldconfig.U):
2488 This variable contains the operating system name (e.g. sunos,
2489 solaris, hpux, etc.). It can be useful later on for setting
2490 defaults. Any spaces are replaced with underscores. It is set
2491 to a null string if we can't figure it out.
2493 osvers (Oldconfig.U):
2494 This variable contains the operating system version (e.g.
2495 4.1.3, 5.2, etc.). It is primarily used for helping select
2496 an appropriate hints file, but might be useful elsewhere for
2497 setting defaults. It is set to '' if we can't figure it out.
2498 We try to be flexible about how much of the version number
2499 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2500 same for this package, hints files might just be os_4.0 or
2501 os_4.1, etc., not keeping separate files for each little release.
2503 package (package.U):
2504 This variable contains the name of the package being constructed.
2505 It is primarily intended for the use of later Configure units.
2508 This variable contains the name of the preferred pager on the system.
2509 Usual values are (the full pathnames of) more, less, pg, or cat.
2512 This variable contains a command that produces the text of the
2513 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2514 "ypcat passwd" when NIS is used.
2516 patchlevel (patchlevel.U):
2517 The patchlevel level of this package.
2518 The value of patchlevel comes from the patchlevel.h file.
2521 This is an old synonym for p_ in Head.U, the character
2522 used to separate elements in the command shell search PATH.
2525 This variable is defined but not used by Configure.
2526 The value is a plain '' and is not useful.
2528 PERL_APIVERSION (Oldsyms.U):
2529 This value is manually set in patchlevel.h and is used
2530 to set the Configure apiversion variable.
2532 PERL_REVISION (Oldsyms.U):
2533 In a Perl version number such as 5.6.2, this is the 5.
2534 This value is manually set in patchlevel.h
2536 PERL_SUBVERSION (Oldsyms.U):
2537 In a Perl version number such as 5.6.2, this is the 2.
2538 Values greater than 50 represent potentially unstable
2539 development subversions.
2540 This value is manually set in patchlevel.h
2542 PERL_VERSION (Oldsyms.U):
2543 In a Perl version number such as 5.6.2, this is the 6.
2544 This value is manually set in patchlevel.h
2546 perladmin (perladmin.U):
2547 Electronic mail address of the perl5 administrator.
2549 perlpath (perlpath.U):
2550 This variable contains the eventual value of the PERLPATH symbol,
2551 which contains the name of the perl interpreter to be used in
2552 shell scripts and in the "eval 'exec'" idiom.
2555 This variable is used internally by Configure to determine the
2556 full pathname (if any) of the pg program. After Configure runs,
2557 the value is reset to a plain "pg" and is not useful.
2559 phostname (myhostname.U):
2560 This variable contains the eventual value of the PHOSTNAME symbol,
2561 which is a command that can be fed to popen() to get the host name.
2562 The program should probably not presume that the domain is or isn't
2565 pidtype (pidtype.U):
2566 This variable defines PIDTYPE to be something like pid_t, int,
2567 ushort, or whatever type is used to declare process ids in the kernel.
2570 Holds the private path used by Configure to find out the libraries.
2571 Its value is prepend to libpth. This variable takes care of special
2572 machines, like the mips. Usually, it should be empty.
2574 pm_apiversion (xs_apiversion.U):
2575 This variable contains the version of the oldest perl
2576 compatible with the present perl. (That is, pure perl modules
2577 written for $pm_apiversion will still work for the current
2578 version). perl.c:incpush() and lib/lib.pm will automatically
2579 search in $sitelib for older directories across major versions
2580 back to pm_apiversion. This is only useful if you have a perl
2581 library directory tree structured like the default one. The
2582 versioned site_perl library was introduced in 5.005, so that's
2583 the default setting for this variable. It's hard to imagine
2584 it changing before Perl6. It is included here for symmetry
2585 with xs_apiveprsion -- the searching algorithms will
2586 (presumably) be similar.
2587 See the INSTALL file for how this works.
2590 This variable is defined but not used by Configure.
2591 The value is a plain '' and is not useful.
2594 This variable is defined but not used by Configure.
2595 The value is a plain '' and is not useful.
2598 This variable holds the name of the directory below which the
2599 user will install the package. Usually, this is /usr/local, and
2600 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2601 man pages in /usr/local/man, etc. It is only used to set defaults
2602 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2604 prefixexp (prefix.U):
2605 This variable holds the full absolute path of the directory below
2606 which the user will install the package. Derived from prefix.
2608 privlib (privlib.U):
2609 This variable contains the eventual value of the PRIVLIB symbol,
2610 which is the name of the private library for this package. It may
2611 have a ~ on the front. It is up to the makefile to eventually create
2612 this directory while performing installation (with ~ substitution).
2614 privlibexp (privlib.U):
2615 This variable is the ~name expanded version of privlib, so that you
2616 may use it directly in Makefiles or shell scripts.
2618 prototype (prototype.U):
2619 This variable holds the eventual value of CAN_PROTOTYPE, which
2620 indicates the C compiler can handle funciton prototypes.
2622 ptrsize (ptrsize.U):
2623 This variable contains the value of the PTRSIZE symbol, which
2624 indicates to the C program how many bytes there are in a pointer.
2626 randbits (randfunc.U):
2627 Indicates how many bits are produced by the function used to
2628 generate normalized random numbers.
2630 randfunc (randfunc.U):
2631 Indicates the name of the random number function to use.
2632 Values include drand48, random, and rand. In C programs,
2633 the 'Drand01' macro is defined to generate uniformly distributed
2634 random numbers over the range [0., 1.[ (see drand01 and nrand).
2636 randseedtype (randfunc.U):
2637 Indicates the type of the argument of the seedfunc.
2639 ranlib (orderlib.U):
2640 This variable is set to the pathname of the ranlib program, if it is
2641 needed to generate random libraries. Set to ":" if ar can generate
2642 random libraries or if random libraries are not supported
2644 rd_nodata (nblock_io.U):
2645 This variable holds the return code from read() when no data is
2646 present. It should be -1, but some systems return 0 when O_NDELAY is
2647 used, which is a shame because you cannot make the difference between
2648 no data and an EOF.. Sigh!
2651 This variable is used internally by Configure to determine the
2652 full pathname (if any) of the rm program. After Configure runs,
2653 the value is reset to a plain "rm" and is not useful.
2656 This variable is defined but not used by Configure.
2657 The value is a plain '' and is not useful.
2660 This variable contains 'true' or 'false' depending whether the
2661 nm extraction should be performed or not, according to the value
2662 of usenm and the flags on the Configure command line.
2664 sched_yield (d_pthread_y.U):
2665 This variable defines the way to yield the execution
2666 of the current thread.
2668 scriptdir (scriptdir.U):
2669 This variable holds the name of the directory in which the user wants
2670 to put publicly scripts for the package in question. It is either
2671 the same directory as for binaries, or a special one that can be
2672 mounted across different architectures, like /usr/share. Programs
2673 must be prepared to deal with ~name expansion.
2675 scriptdirexp (scriptdir.U):
2676 This variable is the same as scriptdir, but is filename expanded
2677 at configuration time, for programs not wanting to bother with it.
2680 This variable is used internally by Configure to determine the
2681 full pathname (if any) of the sed program. After Configure runs,
2682 the value is reset to a plain "sed" and is not useful.
2684 seedfunc (randfunc.U):
2685 Indicates the random number generating seed function.
2686 Values include srand48, srandom, and srand.
2688 selectminbits (selectminbits.U):
2689 This variable holds the minimum number of bits operated by select.
2690 That is, if you do select(n, ...), how many bits at least will be
2691 cleared in the masks if some activity is detected. Usually this
2692 is either n or 32*ceil(n/32), especially many little-endians do
2693 the latter. This is only useful if you have select(), naturally.
2695 selecttype (selecttype.U):
2696 This variable holds the type used for the 2nd, 3rd, and 4th
2697 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2698 is defined, and 'int *' otherwise. This is only useful if you
2699 have select(), naturally.
2702 This variable is defined but not used by Configure.
2703 The value is a plain '' and is not useful.
2706 This variable contains the full pathname of the shell used
2707 on this system to execute Bourne shell scripts. Usually, this will be
2708 /bin/sh, though it's possible that some systems will have /bin/ksh,
2709 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2711 This unit comes before Options.U, so you can't set sh with a '-D'
2712 option, though you can override this (and startsh)
2713 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2716 This variable is defined but not used by Configure.
2717 The value is a plain '' and is not useful.
2719 sharpbang (spitshell.U):
2720 This variable contains the string #! if this system supports that
2723 shmattype (d_shmat.U):
2724 This symbol contains the type of pointer returned by shmat().
2725 It can be 'void *' or 'char *'.
2727 shortsize (intsize.U):
2728 This variable contains the value of the SHORTSIZE symbol which
2729 indicates to the C program how many bytes there are in a short.
2731 shrpenv (libperl.U):
2732 If the user builds a shared libperl.so, then we need to tell the
2733 'perl' executable where it will be able to find the installed libperl.so.
2734 One way to do this on some systems is to set the environment variable
2735 LD_RUN_PATH to the directory that will be the final location of the
2736 shared libperl.so. The makefile can use this with something like
2737 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2739 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2742 See the main perl Makefile.SH for actual working usage.
2743 Alternatively, we might be able to use a command line option such
2744 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2745 $archlibexp/CORE (Linux).
2747 shsharp (spitshell.U):
2748 This variable tells further Configure units whether your sh can
2751 sig_count (sig_name.U):
2752 This variable holds a number larger than the largest valid
2753 signal number. This is usually the same as the NSIG macro.
2755 sig_name (sig_name.U):
2756 This variable holds the signal names, space separated. The leading
2757 SIG in signal name is removed. A ZERO is prepended to the
2758 list. This is currently not used.
2760 sig_name_init (sig_name.U):
2761 This variable holds the signal names, enclosed in double quotes and
2762 separated by commas, suitable for use in the SIG_NAME definition
2763 below. A "ZERO" is prepended to the list, and the list is
2764 terminated with a plain 0. The leading SIG in signal names
2765 is removed. See sig_num.
2767 sig_num (sig_name.U):
2768 This variable holds the signal numbers, space separated. A ZERO is
2769 prepended to the list (corresponding to the fake SIGZERO), and
2770 the list is terminated with a 0. Those numbers correspond to
2771 the value of the signal listed in the same place within the
2774 sig_num_init (sig_name.U):
2775 This variable holds the signal numbers, enclosed in double quotes and
2776 separated by commas, suitable for use in the SIG_NUM definition
2777 below. A "ZERO" is prepended to the list, and the list is
2778 terminated with a plain 0.
2780 signal_t (d_voidsig.U):
2781 This variable holds the type of the signal handler (void or int).
2783 sitearch (sitearch.U):
2784 This variable contains the eventual value of the SITEARCH symbol,
2785 which is the name of the private library for this package. It may
2786 have a ~ on the front. It is up to the makefile to eventually create
2787 this directory while performing installation (with ~ substitution).
2789 sitearchexp (sitearch.U):
2790 This variable is the ~name expanded version of sitearch, so that you
2791 may use it directly in Makefiles or shell scripts.
2793 sitebin (sitebin.U):
2794 This variable holds the name of the directory in which the user wants
2795 to put add-on publicly executable files for the package in question. It
2796 is most often a local directory such as /usr/local/bin. Programs using
2797 this variable must be prepared to deal with ~name substitution.
2799 sitebinexp (sitebin.U):
2800 This is the same as the sitebin variable, but is filename expanded at
2801 configuration time, for use in your makefiles.
2803 sitelib (sitelib.U):
2804 This variable contains the eventual value of the SITELIB symbol,
2805 which is the name of the private library for this package. It may
2806 have a ~ on the front. It is up to the makefile to eventually create
2807 this directory while performing installation (with ~ substitution).
2809 sitelibexp (sitelib.U):
2810 This variable is the ~name expanded version of sitelib, so that you
2811 may use it directly in Makefiles or shell scripts.
2813 siteprefix (siteprefix.U):
2814 This variable holds the full absolute path of the directory below
2815 which the user will install add-on packages.
2817 siteprefixexp (siteprefix.U):
2818 This variable holds the full absolute path of the directory below
2819 which the user will install add-on packages. Derived from siteprefix.
2821 sizetype (sizetype.U):
2822 This variable defines sizetype to be something like size_t,
2823 unsigned long, or whatever type is used to declare length
2824 parameters for string functions.
2827 This variable is defined but not used by Configure.
2828 The value is a plain '' and is not useful.
2831 This variable is defined but not used by Configure.
2832 The value is a plain '' and is not useful.
2835 This variable contains a flag which will tell the C compiler and loader
2836 to produce a program running with a small memory model. It is up to
2837 the Makefile to use this.
2840 This variable holds the extension used to identify shared libraries
2841 (also known as shared objects) on the system. Usually set to 'so'.
2843 sockethdr (d_socket.U):
2844 This variable has any cpp '-I' flags needed for socket support.
2846 socketlib (d_socket.U):
2847 This variable has the names of any libraries needed for socket support.
2850 This variable is used internally by Configure to determine the
2851 full pathname (if any) of the sort program. After Configure runs,
2852 the value is reset to a plain "sort" and is not useful.
2854 spackage (package.U):
2855 This variable contains the name of the package being constructed,
2856 with the first letter uppercased, i.e. suitable for starting
2859 spitshell (spitshell.U):
2860 This variable contains the command necessary to spit out a runnable
2861 shell on this system. It is either cat or a grep '-v' for # comments.
2864 This variable contains a flag which will tell the C compiler and loader
2865 to produce a program that will run in separate I and D space, for those
2866 machines that support separation of instruction and data space. It is
2867 up to the Makefile to use this.
2869 sPRId64 (quadfio.U):
2870 This variable, if defined, contains the string used by stdio to
2871 format 64-bit decimal numbers (format 'd') for output.
2873 sPRIeldbl (longdblfio.U):
2874 This variable, if defined, contains the string used by stdio to
2875 format long doubles (format 'e') for output.
2877 sPRIEldbl (longdblfio.U):
2878 This variable, if defined, contains the string used by stdio to
2879 format long doubles (format 'E') for output.
2881 sPRIfldbl (longdblfio.U):
2882 This variable, if defined, contains the string used by stdio to
2883 format long doubles (format 'f') for output.
2885 sPRIFldbl (longdblfio.U):
2886 This variable, if defined, contains the string used by stdio to
2887 format long doubles (format 'F') for output.
2889 sPRIgldbl (longdblfio.U):
2890 This variable, if defined, contains the string used by stdio to
2891 format long doubles (format 'g') for output.
2893 sPRIGldbl (longdblfio.U):
2894 This variable, if defined, contains the string used by stdio to
2895 format long doubles (format 'G') for output.
2897 sPRIi64 (quadfio.U):
2898 This variable, if defined, contains the string used by stdio to
2899 format 64-bit decimal numbers (format 'i') for output.
2901 sPRIo64 (quadfio.U):
2902 This variable, if defined, contains the string used by stdio to
2903 format 64-bit octal numbers (format 'o') for output.
2905 sPRIu64 (quadfio.U):
2906 This variable, if defined, contains the string used by stdio to
2907 format 64-bit unsigned decimal numbers (format 'u') for output.
2909 sPRIx64 (quadfio.U):
2910 This variable, if defined, contains the string used by stdio to
2911 format 64-bit hexadecimal numbers (format 'x') for output.
2913 sPRIX64 (quadfio.U):
2914 This variable, if defined, contains the string used by stdio to
2915 format 64-bit hExADECimAl numbers (format 'X') for output.
2918 This variable holds the path to the package source. It is up to
2919 the Makefile to use this variable and set VPATH accordingly to
2920 find the sources remotely.
2922 ssizetype (ssizetype.U):
2923 This variable defines ssizetype to be something like ssize_t,
2924 long or int. It is used by functions that return a count
2925 of bytes or an error condition. It must be a signed type.
2926 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2928 startperl (startperl.U):
2929 This variable contains the string to put on the front of a perl
2930 script to make sure (hopefully) that it runs with perl and not some
2931 shell. Of course, that leading line must be followed by the classical
2933 eval 'exec perl -S $0 ${1+"$@"}'
2934 if $running_under_some_shell;
2935 to guarantee perl startup should the shell execute the script. Note
2936 that this magic incatation is not understood by csh.
2938 startsh (startsh.U):
2939 This variable contains the string to put on the front of a shell
2940 script to make sure (hopefully) that it runs with sh and not some
2943 static_ext (Extensions.U):
2944 This variable holds a list of XS extension files we want to
2945 link statically into the package. It is used by Makefile.
2947 stdchar (stdchar.U):
2948 This variable conditionally defines STDCHAR to be the type of char
2949 used in stdio.h. It has the values "unsigned char" or "char".
2951 stdio_base (d_stdstdio.U):
2952 This variable defines how, given a FILE pointer, fp, to access the
2953 _base field (or equivalent) of stdio.h's FILE structure. This will
2954 be used to define the macro FILE_base(fp).
2956 stdio_bufsiz (d_stdstdio.U):
2957 This variable defines how, given a FILE pointer, fp, to determine
2958 the number of bytes store in the I/O buffer pointer to by the
2959 _base field (or equivalent) of stdio.h's FILE structure. This will
2960 be used to define the macro FILE_bufsiz(fp).
2962 stdio_cnt (d_stdstdio.U):
2963 This variable defines how, given a FILE pointer, fp, to access the
2964 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2965 be used to define the macro FILE_cnt(fp).
2967 stdio_filbuf (d_stdstdio.U):
2968 This variable defines how, given a FILE pointer, fp, to tell
2969 stdio to refill it's internal buffers (?). This will
2970 be used to define the macro FILE_filbuf(fp).
2972 stdio_ptr (d_stdstdio.U):
2973 This variable defines how, given a FILE pointer, fp, to access the
2974 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2975 be used to define the macro FILE_ptr(fp).
2977 stdio_stream_array (stdio_streams.U):
2978 This variable tells the name of the array holding the stdio streams.
2979 Usual values include _iob, __iob, and __sF.
2981 strings (i_string.U):
2982 This variable holds the full path of the string header that will be
2983 used. Typically /usr/include/string.h or /usr/include/strings.h.
2986 This variable is defined but not used by Configure.
2987 The value is a plain '' and is not useful.
2989 subversion (patchlevel.U):
2990 The subversion level of this package.
2991 The value of subversion comes from the patchlevel.h file.
2992 This is unique to perl.
2995 This variable holds the place where the manual is located on this
2996 system. It is not the place where the user wants to put his manual
2997 pages. Rather it is the place where Configure may look to find manual
2998 for unix commands (section 1 of the manual usually). See mansrc.
3001 This variable is defined but not used by Configure.
3002 The value is a plain '' and is not useful.
3005 This variable is defined but not used by Configure.
3006 The value is a plain '' and is not useful.
3009 This variable is defined but not used by Configure.
3010 The value is a plain '' and is not useful.
3013 This variable is defined but not used by Configure.
3014 The value is a plain '' and is not useful.
3017 This variable is used internally by Configure to determine the
3018 full pathname (if any) of the test program. After Configure runs,
3019 the value is reset to a plain "test" and is not useful.
3021 timeincl (i_time.U):
3022 This variable holds the full path of the included time header(s).
3024 timetype (d_time.U):
3025 This variable holds the type returned by time(). It can be long,
3026 or time_t on BSD sites (in which case <sys/types.h> should be
3027 included). Anyway, the type Time_t should be used.
3030 This variable is used internally by Configure to determine the
3031 full pathname (if any) of the touch program. After Configure runs,
3032 the value is reset to a plain "touch" and is not useful.
3035 This variable is used internally by Configure to determine the
3036 full pathname (if any) of the tr program. After Configure runs,
3037 the value is reset to a plain "tr" and is not useful.
3040 This variable contains the value to be passed to the tr(1)
3041 command to transliterate a newline. Typical values are
3042 '\012' and '\n'. This is needed for EBCDIC systems where
3043 newline is not necessarily '\012'.
3046 This variable is defined but not used by Configure.
3047 The value is a plain '' and is not useful.
3049 uidsign (uidsign.U):
3050 This variable contains the signedness of a uidtype.
3051 1 for unsigned, -1 for signed.
3053 uidtype (uidtype.U):
3054 This variable defines Uid_t to be something like uid_t, int,
3055 ushort, or whatever type is used to declare user ids in the kernel.
3058 This variable is used internally by Configure to determine the
3059 full pathname (if any) of the uname program. After Configure runs,
3060 the value is reset to a plain "uname" and is not useful.
3063 This variable is used internally by Configure to determine the
3064 full pathname (if any) of the uniq program. After Configure runs,
3065 the value is reset to a plain "uniq" and is not useful.
3067 use64bits (use64bits.U):
3068 This variable conditionally defines the USE_64_BITS symbol,
3069 and indicates that explicit 64-bit interfaces should be used
3073 This variable indicates if the the system supports dynamic
3074 loading of some sort. See also dlsrc and dlobj.
3076 uselargefiles (uselfs.U):
3077 This variable conditionally defines the USE_LARGE_FILES symbol,
3078 and indicates that large file interfaces should be used when
3079 available. The use64bits symbol will also be turned on if necessary.
3081 uselongdouble (uselongdbl.U):
3082 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3083 and indicates that long doubles should be used when available.
3085 usemorebits (usemorebits.U):
3086 This variable conditionally defines the USE_MORE_BITS symbol,
3087 and indicates that explicit 64-bit interfaces and long doubles
3088 should be used when available.
3090 usemultiplicity (usemultiplicity.U):
3091 This variable conditionally defines the MULTIPLICITY symbol,
3092 and indicates that Perl should be built to use multiplicity.
3094 usemymalloc (mallocsrc.U):
3095 This variable contains y if the malloc that comes with this package
3096 is desired over the system's version of malloc. People often include
3097 special versions of malloc for effiency, but such versions are often
3098 less portable. See also mallocsrc and mallocobj.
3099 If this is 'y', then -lmalloc is removed from $libs.
3102 This variable contains 'true' or 'false' depending whether the
3103 nm extraction is wanted or not.
3105 useopcode (Extensions.U):
3106 This variable holds either 'true' or 'false' to indicate
3107 whether the Opcode extension should be used. The sole
3108 use for this currently is to allow an easy mechanism
3109 for users to skip the Opcode extension from the Configure
3112 useperlio (useperlio.U):
3113 This variable conditionally defines the USE_PERLIO symbol,
3114 and indicates that the PerlIO abstraction should be
3117 useposix (Extensions.U):
3118 This variable holds either 'true' or 'false' to indicate
3119 whether the POSIX extension should be used. The sole
3120 use for this currently is to allow an easy mechanism
3121 for hints files to indicate that POSIX will not compile
3122 on a particular system.
3125 This variable is set to true when the user agrees to use sfio.
3126 It is set to false when sfio is not available or when the user
3127 explicitely requests not to use sfio. It is here primarily so
3128 that command-line settings can override the auto-detection of
3129 d_sfio without running into a "WHOA THERE".
3131 useshrplib (libperl.U):
3132 This variable is set to 'yes' if the user wishes
3133 to build a shared libperl, and 'no' otherwise.
3135 usesocks (usesocks.U):
3136 This variable conditionally defines the USE_SOCKS symbol,
3137 and indicates that Perl should be built to use SOCKS.
3139 usethreads (usethreads.U):
3140 This variable conditionally defines the USE_THREADS symbol,
3141 and indicates that Perl should be built to use threads.
3143 usevendorprefix (vendorprefix.U):
3144 This variable tells whether the vendorprefix
3145 and consequently other vendor* paths are in use.
3147 usevfork (d_vfork.U):
3148 This variable is set to true when the user accepts to use vfork.
3149 It is set to false when no vfork is available or when the user
3150 explicitely requests not to use vfork.
3153 This variable holds the path of the include files, which is
3154 usually /usr/include. It is mainly used by other Configure units.
3157 This variable is defined but not used by Configure.
3158 The value is a plain '' and is not useful.
3160 vendorbin (vendorbin.U):
3161 This variable contains the eventual value of the VENDORBIN symbol,
3162 which is the name of the private directory for exuctables for this package.
3163 It may have a ~ on the front. It is up to the makefile to eventually create
3164 this directory while performing installation (with ~ substitution).
3165 Vendors who distribute perl binaries may place their own
3166 extensions and modules in this directory.
3168 vendorbinexp (vendorbin.U):
3169 This variable is the ~name expanded version of vendorbin, so that you
3170 may use it directly in Makefiles or shell scripts.
3172 vendorlib (vendorlib.U):
3173 This variable contains the eventual value of the VENDORLIB symbol,
3174 which is the name of the private library for this package. It may
3175 have a ~ on the front. It is up to the makefile to eventually create
3176 this directory while performing installation (with ~ substitution).
3177 Vendors who distribute perl binaries may place their own
3178 extensions and modules in this directory.
3180 vendorlibexp (vendorlib.U):
3181 This variable is the ~name expanded version of vendorlib, so that you
3182 may use it directly in Makefiles or shell scripts.
3184 vendorprefix (vendorprefix.U):
3185 This variable holds the full absolute path of the directory below
3186 which the vendor will install add-on packages.
3188 vendorprefixexp (vendorprefix.U):
3189 This variable holds the full absolute path of the directory below
3190 which the vendor will install add-on packages. Derived from vendorprefix.
3192 version (patchlevel.U):
3193 The full version number of this package. This combines
3194 baserev, patchlevel, and subversion to get the full
3195 version number, including any possible subversions. Care
3196 is taken to use the C locale in order to get something
3197 like 5.004 instead of 5,004. This is unique to perl.
3200 This variable is defined but not used by Configure.
3201 The value is a plain '' and is not useful.
3203 voidflags (voidflags.U):
3204 This variable contains the eventual value of the VOIDFLAGS symbol,
3205 which indicates how much support of the void type is given by this
3206 compiler. See VOIDFLAGS for more info.
3209 This variable holds extra path (space-separated) used to find
3210 libraries on this platform, for example CPU-specific libraries
3211 (on multi-CPU platforms) may be listed here.
3213 xs_apiversion (xs_apiversion.U):
3214 This variable contains the version of the oldest perl binary
3215 compatible with the present perl. perl.c:incpush() and
3216 lib/lib.pm will automatically search in $sitearch for older
3217 directories across major versions back to xs_apiversion.
3218 This is only useful if you have a perl library directory tree
3219 structured like the default one.
3220 See INSTALL for how this works.
3221 The versioned site_perl directory was introduced in 5.005,
3222 so that is the lowest possible value.
3223 Since this can depend on compile time options (such as
3224 bincompat) it is set by Configure. Other non-default sources
3225 of potential incompatibility, such as multiplicity, threads,
3226 debugging, 64bits, sfio, etc., are not checked for currently,
3227 though in principle we could go snooping around in old
3231 This variable is defined but not used by Configure.
3232 The value is a plain '' and is not useful.
3235 This variable is used internally by Configure to determine the
3236 full pathname (if any) of the zip program. After Configure runs,
3237 the value is reset to a plain "zip" and is not useful.