1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double. Usual values are 2, 4 and 8.
31 ansi2knr (ansi2knr.U):
32 This variable is set if the user needs to run ansi2knr.
33 Currently, this is not supported, so we just abort.
35 aphostname (d_gethname.U):
36 This variable contains the command which can be used to compute the
37 host name. The command is fully qualified by its absolute path, to make
38 it safe when used by a process with super-user privileges.
40 apiversion (patchlevel.U):
41 MakeMaker will install add-on modules in a directory with the
42 PERL_APIVERSION version number. The value is set manually in
43 patchlevel.h. Normally, for maintenance releases, this is
44 just something like 5.005 or 5.6 or 5.7. That is, it does not
45 include the subversion number and does not change across
46 maintenance releases. This is so that add-on extensions can
47 be shared across maintenance versions. It is unclear how this
48 ought to work for developer versions. If a release breaks
49 binary compatibility, this number should be increased.
52 This variable is used internally by Configure to determine the
53 full pathname (if any) of the ar program. After Configure runs,
54 the value is reset to a plain "ar" and is not useful.
57 This variable holds the name of the directory in which the user wants
58 to put architecture-dependent public library files for $package.
59 It is most often a local directory such as /usr/local/lib.
60 Programs using this variable must be prepared to deal
61 with filename expansion.
63 archlibexp (archlib.U):
64 This variable is the same as the archlib variable, but is
65 filename expanded at configuration time, for convenient use.
67 archname64 (use64bits.U):
68 This variable is used for the 64-bitness part of $archname.
70 archname (archname.U):
71 This variable is a short name to characterize the current
72 architecture. It is used mainly to construct the default archlib.
75 This variable defines any additional objects that must be linked
76 in with the program on this architecture. On unix, it is usually
77 empty. It is typically used to include emulations of unix calls
78 or other facilities. For perl on OS/2, for example, this would
82 This variable is used internally by Configure to determine the
83 full pathname (if any) of the awk program. After Configure runs,
84 the value is reset to a plain "awk" and is not useful.
87 The base revision level of this package, from the .package file.
90 This variable is defined but not used by Configure.
91 The value is a plain '' and is not useful.
94 This variable holds the name of the directory in which the user wants
95 to put publicly executable images for the package in question. It
96 is most often a local directory such as /usr/local/bin. Programs using
97 this variable must be prepared to deal with ~name substitution.
99 bincompat5005 (bincompat5005.U):
100 This variable contains y if Perl 5.006 should be binary-compatible
104 This is the same as the bin variable, but is filename expanded at
105 configuration time, for use in your makefiles.
108 This variable is defined but not used by Configure.
109 The value is a plain '' and is not useful.
112 This variable is used internally by Configure to determine the
113 full pathname (if any) of the byacc program. After Configure runs,
114 the value is reset to a plain "byacc" and is not useful.
116 byteorder (byteorder.U):
117 This variable holds the byte order. In the following, larger digits
118 indicate more significance. The variable byteorder is either 4321
119 on a big-endian machine, or 1234 on a little-endian, or 87654321
120 on a Cray ... or 3412 with weird order !
123 This variable contains the \c string if that is what causes the echo
124 command to suppress newline. Otherwise it is null. Correct usage is
125 $echo $n "prompt for a question: $c".
127 castflags (d_castneg.U):
128 This variable contains a flag that precise difficulties the
129 compiler has casting odd floating values to unsigned long:
131 1 = couldn't cast < 0
132 2 = couldn't cast >= 0x80000000
133 4 = couldn't cast in argument expression list
136 This variable is used internally by Configure to determine the
137 full pathname (if any) of the cat program. After Configure runs,
138 the value is reset to a plain "cat" and is not useful.
141 This variable holds the name of a command to execute a C compiler which
142 can resolve multiple global references that happen to have the same
143 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
145 cccdlflags (dlsrc.U):
146 This variable contains any special flags that might need to be
147 passed with 'cc -c' to compile modules to be used to create a shared
148 library that will be used for dynamic loading. For hpux, this
149 should be +z. It is up to the makefile to use it.
152 This variable contains any special flags that might need to be
153 passed to cc to link with a shared library for dynamic loading.
154 It is up to the makefile to use it. For sunos 4.1, it should
158 This variable contains any additional C compiler flags desired by
159 the user. It is up to the Makefile to use this.
161 ccsymbols (Cppsym.U):
162 The variable contains the symbols defined by the C compiler alone.
163 The symbols defined by cpp or by cc when it calls cpp are not in
164 this list, see cppsymbols and cppccsymbols.
165 The list is a space-separated list of symbol=value tokens.
168 Login name of the person who ran the Configure script and answered the
169 questions. This is used to tag both config.sh and config_h.SH.
171 cf_email (cf_email.U):
172 Electronic mail address of the person who ran Configure. This can be
173 used by units that require the user's e-mail, like MailList.U.
176 Holds the output of the "date" command when the configuration file was
177 produced. This is used to tag both config.sh and config_h.SH.
180 This variable is defined but not used by Configure.
181 The value is a plain '' and is not useful.
184 This variable is defined but not used by Configure.
185 The value is a plain '' and is not useful.
188 This variable is defined but not used by Configure.
189 The value is a plain '' and is not useful.
191 clocktype (d_times.U):
192 This variable holds the type returned by times(). It can be long,
193 or clock_t on BSD sites (in which case <sys/types.h> should be
197 This variable is used internally by Configure to determine the
198 full pathname (if any) of the comm program. After Configure runs,
199 the value is reset to a plain "comm" and is not useful.
202 This variable is defined but not used by Configure.
203 The value is a plain '' and is not useful.
205 CONFIGDOTSH (Oldsyms.U):
206 This is set to 'true' in config.sh so that a shell script
207 sourcing config.sh can tell if it has been sourced already.
209 contains (contains.U):
210 This variable holds the command to do a grep with a proper return
211 status. On most sane systems it is simply "grep". On insane systems
212 it is a grep followed by a cat followed by a test. This variable
213 is primarily for the use of other Configure units.
216 This variable is used internally by Configure to determine the
217 full pathname (if any) of the cp program. After Configure runs,
218 the value is reset to a plain "cp" and is not useful.
221 This variable is defined but not used by Configure.
222 The value is a plain '' and is not useful.
225 This variable is used internally by Configure to determine the
226 full pathname (if any) of the cpp program. After Configure runs,
227 the value is reset to a plain "cpp" and is not useful.
229 cpp_stuff (cpp_stuff.U):
230 This variable contains an identification of the catenation mechanism
231 used by the C preprocessor.
233 cppccsymbols (Cppsym.U):
234 The variable contains the symbols defined by the C compiler when
235 when it calls cpp. The symbols defined by the cc alone or cpp
236 alone are not in this list, see ccsymbols and cppsymbols.
237 The list is a space-separated list of symbol=value tokens.
239 cppflags (ccflags.U):
240 This variable holds the flags that will be passed to the C pre-
241 processor. It is up to the Makefile to use it.
243 cpplast (cppstdin.U):
244 This variable has the same functionality as cppminus, only it applies
245 to cpprun and not cppstdin.
247 cppminus (cppstdin.U):
248 This variable contains the second part of the string which will invoke
249 the C preprocessor on the standard input and produce to standard
250 output. This variable will have the value "-" if cppstdin needs
251 a minus to specify standard input, otherwise the value is "".
254 This variable contains the command which will invoke a C preprocessor
255 on standard input and put the output to stdout. It is guaranteed not
256 to be a wrapper and may be a null string if no preprocessor can be
257 made directly available. This preprocessor might be different from the
258 one used by the C compiler. Don't forget to append cpplast after the
259 preprocessor options.
261 cppstdin (cppstdin.U):
262 This variable contains the command which will invoke the C
263 preprocessor on standard input and put the output to stdout.
264 It is primarily used by other Configure units that ask about
265 preprocessor symbols.
267 cppsymbols (Cppsym.U):
268 The variable contains the symbols defined by the C preprocessor
269 alone. The symbols defined by cc or by cc when it calls cpp are
270 not in this list, see ccsymbols and cppccsymbols.
271 The list is a space-separated list of symbol=value tokens.
273 crosscompile (crosscompile.U):
274 This variable conditionally defines the CROSSCOMPILE symbol
275 which signifies that the build process is be a cross-compilation.
276 This is normally set by hints files or from Configure command line.
278 cryptlib (d_crypt.U):
279 This variable holds -lcrypt or the path to a libcrypt.a archive if
280 the crypt() function is not defined in the standard C library. It is
281 up to the Makefile to use this.
284 This variable is used internally by Configure to determine the
285 full pathname (if any) of the csh program. After Configure runs,
286 the value is reset to a plain "csh" and is not useful.
288 d_access (d_access.U):
289 This variable conditionally defines HAS_ACCESS if the access() system
290 call is available to check for access permissions using real IDs.
292 d_accessx (d_accessx.U):
293 This variable conditionally defines the HAS_ACCESSX symbol, which
294 indicates to the C program that the accessx() routine is available.
297 This variable conditionally defines the HAS_ALARM symbol, which
298 indicates to the C program that the alarm() routine is available.
300 d_archlib (archlib.U):
301 This variable conditionally defines ARCHLIB to hold the pathname
302 of architecture-dependent library files for $package. If
303 $archlib is the same as $privlib, then this is set to undef.
306 This variable conditionally defines the HAS_ATOLF symbol, which
307 indicates to the C program that the atolf() routine is available.
310 This variable conditionally defines the HAS_ATOLL symbol, which
311 indicates to the C program that the atoll() routine is available.
313 d_attribut (d_attribut.U):
314 This variable conditionally defines HASATTRIBUTE, which
315 indicates the C compiler can check for function attributes,
316 such as printf formats.
319 This variable conditionally defines the HAS_BCMP symbol if
320 the bcmp() routine is available to compare strings.
323 This variable conditionally defines the HAS_BCOPY symbol if
324 the bcopy() routine is available to copy strings.
326 d_bincompat5005 (bincompat5005.U):
327 This variable conditionally defines BINCOMPAT5005 so that embed.h
328 can take special action if Perl 5.006 should be binary-compatible
329 with Perl 5.005. This is impossible for builds that use features
330 like threads and multiplicity it is always $undef for those versions.
333 This symbol conditionally defines the symbol BSD when running on a
336 d_bsdgetpgrp (d_getpgrp.U):
337 This variable conditionally defines USE_BSD_GETPGRP if
338 getpgrp needs one arguments whereas USG one needs none.
340 d_bsdsetpgrp (d_setpgrp.U):
341 This variable conditionally defines USE_BSD_SETPGRP if
342 setpgrp needs two arguments whereas USG one needs none.
343 See also d_setpgid for a POSIX interface.
346 This variable conditionally defines the HAS_BZERO symbol if
347 the bzero() routine is available to set memory to 0.
349 d_casti32 (d_casti32.U):
350 This variable conditionally defines CASTI32, which indicates
351 whether the C compiler can cast large floats to 32-bit ints.
353 d_castneg (d_castneg.U):
354 This variable conditionally defines CASTNEG, which indicates
355 wether the C compiler can cast negative float to unsigned.
357 d_charvspr (d_vprintf.U):
358 This variable conditionally defines CHARVSPRINTF if this system
359 has vsprintf returning type (char*). The trend seems to be to
360 declare it as "int vsprintf()".
363 This variable conditionally defines the HAS_CHOWN symbol, which
364 indicates to the C program that the chown() routine is available.
366 d_chroot (d_chroot.U):
367 This variable conditionally defines the HAS_CHROOT symbol, which
368 indicates to the C program that the chroot() routine is available.
370 d_chsize (d_chsize.U):
371 This variable conditionally defines the CHSIZE symbol, which
372 indicates to the C program that the chsize() routine is available
373 to truncate files. You might need a -lx to get this routine.
375 d_closedir (d_closedir.U):
376 This variable conditionally defines HAS_CLOSEDIR if closedir() is
379 d_cmsghdr_s (d_socket.U):
380 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
381 which indicates that the the struct cmsghdr is supported.
384 This variable conditionally defines the HASCONST symbol, which
385 indicates to the C program that this C compiler knows about the
389 This variable conditionally defines the CRYPT symbol, which
390 indicates to the C program that the crypt() routine is available
391 to encrypt passwords and the like.
394 This variable conditionally defines the CSH symbol, which
395 indicates to the C program that the C-shell exists.
397 d_cuserid (d_cuserid.U):
398 This variable conditionally defines the HAS_CUSERID symbol, which
399 indicates to the C program that the cuserid() routine is available
400 to get character login names.
402 d_dbl_dig (d_dbl_dig.U):
403 This variable conditionally defines d_dbl_dig if this system's
404 header files provide DBL_DIG, which is the number of significant
405 digits in a double precision number.
407 d_difftime (d_difftime.U):
408 This variable conditionally defines the HAS_DIFFTIME symbol, which
409 indicates to the C program that the difftime() routine is available.
411 d_dirnamlen (i_dirent.U):
412 This variable conditionally defines DIRNAMLEN, which indicates
413 to the C program that the length of directory entry names is
414 provided by a d_namelen field.
416 d_dlerror (d_dlerror.U):
417 This variable conditionally defines the HAS_DLERROR symbol, which
418 indicates to the C program that the dlerror() routine is available.
420 d_dlopen (d_dlopen.U):
421 This variable conditionally defines the HAS_DLOPEN symbol, which
422 indicates to the C program that the dlopen() routine is available.
424 d_dlsymun (d_dlsymun.U):
425 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
426 indicates that we need to prepend an underscore to the symbol
427 name before calling dlsym().
429 d_dosuid (d_dosuid.U):
430 This variable conditionally defines the symbol DOSUID, which
431 tells the C program that it should insert setuid emulation code
432 on hosts which have setuid #! scripts disabled.
434 d_drand48proto (d_drand48proto.U):
435 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
436 which indicates to the C program that the system provides
437 a prototype for the drand48() function. Otherwise, it is
438 up to the program to supply one.
441 This variable conditionally defines HAS_DUP2 if dup2() is
442 available to duplicate file descriptors.
444 d_eaccess (d_eaccess.U):
445 This variable conditionally defines the HAS_EACCESS symbol, which
446 indicates to the C program that the eaccess() routine is available.
448 d_endgrent (d_endgrent.U):
449 This variable conditionally defines the HAS_ENDGRENT symbol, which
450 indicates to the C program that the endgrent() routine is available
451 for sequential access of the group database.
453 d_endhent (d_endhent.U):
454 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
455 available to close whatever was being used for host queries.
457 d_endnent (d_endnent.U):
458 This variable conditionally defines HAS_ENDNETENT if endnetent() is
459 available to close whatever was being used for network queries.
461 d_endpent (d_endpent.U):
462 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
463 available to close whatever was being used for protocol queries.
465 d_endpwent (d_endpwent.U):
466 This variable conditionally defines the HAS_ENDPWENT symbol, which
467 indicates to the C program that the endpwent() routine is available
468 for sequential access of the passwd database.
470 d_endsent (d_endsent.U):
471 This variable conditionally defines HAS_ENDSERVENT if endservent() is
472 available to close whatever was being used for service queries.
474 d_endspent (d_endspent.U):
475 This variable conditionally defines HAS_ENDSPENT if endspent() is
476 available to finalize the scan of SysV shadow password entries.
478 d_eofnblk (nblock_io.U):
479 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
480 when reading from a non-blocking I/O source.
483 This variable conditionally defines the symbols EUNICE and VAX, which
484 alerts the C program that it must deal with ideosyncracies of VMS.
486 d_fchmod (d_fchmod.U):
487 This variable conditionally defines the HAS_FCHMOD symbol, which
488 indicates to the C program that the fchmod() routine is available
489 to change mode of opened files.
491 d_fchown (d_fchown.U):
492 This variable conditionally defines the HAS_FCHOWN symbol, which
493 indicates to the C program that the fchown() routine is available
494 to change ownership of opened files.
497 This variable conditionally defines the HAS_FCNTL symbol, and indicates
498 whether the fcntl() function exists
500 d_fd_macros (d_fd_set.U):
501 This variable contains the eventual value of the HAS_FD_MACROS symbol,
502 which indicates if your C compiler knows about the macros which
503 manipulate an fd_set.
505 d_fd_set (d_fd_set.U):
506 This variable contains the eventual value of the HAS_FD_SET symbol,
507 which indicates if your C compiler knows about the fd_set typedef.
509 d_fds_bits (d_fd_set.U):
510 This variable contains the eventual value of the HAS_FDS_BITS symbol,
511 which indicates if your fd_set typedef contains the fds_bits member.
512 If you have an fd_set typedef, but the dweebs who installed it did
513 a half-fast job and neglected to provide the macros to manipulate
514 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
516 d_fgetpos (d_fgetpos.U):
517 This variable conditionally defines HAS_FGETPOS if fgetpos() is
518 available to get the file position indicator.
520 d_flexfnam (d_flexfnam.U):
521 This variable conditionally defines the FLEXFILENAMES symbol, which
522 indicates that the system supports filenames longer than 14 characters.
525 This variable conditionally defines HAS_FLOCK if flock() is
526 available to do file locking.
529 This variable conditionally defines the HAS_FORK symbol, which
530 indicates to the C program that the fork() routine is available.
532 d_fpathconf (d_pathconf.U):
533 This variable conditionally defines the HAS_FPATHCONF symbol, which
534 indicates to the C program that the pathconf() routine is available
535 to determine file-system related limits and options associated
536 with a given open file descriptor.
539 This symbol will be defined if the C compiler supports fpos64_t.
541 d_fs_data_s (d_statfs.U):
542 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
543 which indicates that the struct fs_data is supported.
545 d_fseeko (d_fseeko.U):
546 This variable conditionally defines the HAS_FSEEKO symbol, which
547 indicates to the C program that the fseeko() routine is available.
549 d_fsetpos (d_fsetpos.U):
550 This variable conditionally defines HAS_FSETPOS if fsetpos() is
551 available to set the file position indicator.
553 d_fstatfs (d_fstatfs.U):
554 This variable conditionally defines the HAS_FSTATFS symbol, which
555 indicates to the C program that the fstatfs() routine is available.
557 d_fstatvfs (d_statvfs.U):
558 This variable conditionally defines the HAS_FSTATVFS symbol, which
559 indicates to the C program that the fstatvfs() routine is available.
561 d_ftello (d_ftello.U):
562 This variable conditionally defines the HAS_FTELLO symbol, which
563 indicates to the C program that the ftello() routine is available.
566 This variable conditionally defines the HAS_FTIME symbol, which indicates
567 that the ftime() routine exists. The ftime() routine is basically
568 a sub-second accuracy clock.
570 d_Gconvert (d_gconvert.U):
571 This variable holds what Gconvert is defined as to convert
572 floating point numbers into strings. It could be 'gconvert'
573 or a more complex macro emulating gconvert with gcvt() or sprintf.
575 d_Gconvert='gconvert((x),(n),(t),(b))'
576 d_Gconvert='gcvt((x),(n),(b))'
577 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
579 d_getgrent (d_getgrent.U):
580 This variable conditionally defines the HAS_GETGRENT symbol, which
581 indicates to the C program that the getgrent() routine is available
582 for sequential access of the group database.
584 d_getgrps (d_getgrps.U):
585 This variable conditionally defines the HAS_GETGROUPS symbol, which
586 indicates to the C program that the getgroups() routine is available
587 to get the list of process groups.
589 d_gethbyaddr (d_gethbyad.U):
590 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
591 indicates to the C program that the gethostbyaddr() routine is available
592 to look up hosts by their IP addresses.
594 d_gethbyname (d_gethbynm.U):
595 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
596 indicates to the C program that the gethostbyname() routine is available
597 to look up host names in some data base or other.
599 d_gethent (d_gethent.U):
600 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
601 available to look up host names in some data base or another.
603 d_gethname (d_gethname.U):
604 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
605 indicates to the C program that the gethostname() routine may be
606 used to derive the host name.
608 d_gethostprotos (d_gethostprotos.U):
609 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
610 which indicates to the C program that <netdb.h> supplies
611 prototypes for the various gethost*() functions.
612 See also netdbtype.U for probing for various netdb types.
614 d_getlogin (d_getlogin.U):
615 This variable conditionally defines the HAS_GETLOGIN symbol, which
616 indicates to the C program that the getlogin() routine is available
617 to get the login name.
619 d_getmntent (d_getmntent.U):
620 This variable conditionally defines the HAS_GETMNTENT symbol, which
621 indicates to the C program that the getmntent() routine is available
622 to iterate through mounted files to get their mount info.
624 d_getnbyaddr (d_getnbyad.U):
625 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
626 indicates to the C program that the getnetbyaddr() routine is available
627 to look up networks by their IP addresses.
629 d_getnbyname (d_getnbynm.U):
630 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
631 indicates to the C program that the getnetbyname() routine is available
632 to look up networks by their names.
634 d_getnent (d_getnent.U):
635 This variable conditionally defines HAS_GETNETENT if getnetent() is
636 available to look up network names in some data base or another.
638 d_getnetprotos (d_getnetprotos.U):
639 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
640 which indicates to the C program that <netdb.h> supplies
641 prototypes for the various getnet*() functions.
642 See also netdbtype.U for probing for various netdb types.
644 d_getpbyname (d_getprotby.U):
645 This variable conditionally defines the HAS_GETPROTOBYNAME
646 symbol, which indicates to the C program that the
647 getprotobyname() routine is available to look up protocols
650 d_getpbynumber (d_getprotby.U):
651 This variable conditionally defines the HAS_GETPROTOBYNUMBER
652 symbol, which indicates to the C program that the
653 getprotobynumber() routine is available to look up protocols
656 d_getpent (d_getpent.U):
657 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
658 available to look up protocols in some data base or another.
660 d_getpgid (d_getpgid.U):
661 This variable conditionally defines the HAS_GETPGID symbol, which
662 indicates to the C program that the getpgid(pid) function
663 is available to get the process group id.
665 d_getpgrp2 (d_getpgrp2.U):
666 This variable conditionally defines the HAS_GETPGRP2 symbol, which
667 indicates to the C program that the getpgrp2() (as in DG/UX) routine
668 is available to get the current process group.
670 d_getpgrp (d_getpgrp.U):
671 This variable conditionally defines HAS_GETPGRP if getpgrp() is
672 available to get the current process group.
674 d_getppid (d_getppid.U):
675 This variable conditionally defines the HAS_GETPPID symbol, which
676 indicates to the C program that the getppid() routine is available
677 to get the parent process ID.
679 d_getprior (d_getprior.U):
680 This variable conditionally defines HAS_GETPRIORITY if getpriority()
681 is available to get a process's priority.
683 d_getprotoprotos (d_getprotoprotos.U):
684 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
685 which indicates to the C program that <netdb.h> supplies
686 prototypes for the various getproto*() functions.
687 See also netdbtype.U for probing for various netdb types.
689 d_getpwent (d_getpwent.U):
690 This variable conditionally defines the HAS_GETPWENT symbol, which
691 indicates to the C program that the getpwent() routine is available
692 for sequential access of the passwd database.
694 d_getsbyname (d_getsrvby.U):
695 This variable conditionally defines the HAS_GETSERVBYNAME
696 symbol, which indicates to the C program that the
697 getservbyname() routine is available to look up services
700 d_getsbyport (d_getsrvby.U):
701 This variable conditionally defines the HAS_GETSERVBYPORT
702 symbol, which indicates to the C program that the
703 getservbyport() routine is available to look up services
706 d_getsent (d_getsent.U):
707 This variable conditionally defines HAS_GETSERVENT if getservent() is
708 available to look up network services in some data base or another.
710 d_getservprotos (d_getservprotos.U):
711 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
712 which indicates to the C program that <netdb.h> supplies
713 prototypes for the various getserv*() functions.
714 See also netdbtype.U for probing for various netdb types.
716 d_getspent (d_getspent.U):
717 This variable conditionally defines HAS_GETSPENT if getspent() is
718 available to retrieve SysV shadow password entries sequentially.
720 d_getspnam (d_getspnam.U):
721 This variable conditionally defines HAS_GETSPNAM if getspnam() is
722 available to retrieve SysV shadow password entries by name.
724 d_gettimeod (d_ftime.U):
725 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
726 indicates that the gettimeofday() system call exists (to obtain a
727 sub-second accuracy clock). You should probably include <sys/resource.h>.
729 d_gnulibc (d_gnulibc.U):
730 Defined if we're dealing with the GNU C Library.
732 d_grpasswd (i_grp.U):
733 This variable conditionally defines GRPASSWD, which indicates
734 that struct group in <grp.h> contains gr_passwd.
736 d_hasmntopt (d_hasmntopt.U):
737 This variable conditionally defines the HAS_HASMNTOPT symbol, which
738 indicates to the C program that the hasmntopt() routine is available
739 to query the mount options of file systems.
742 This variable conditionally defines HAS_HTONL if htonl() and its
743 friends are available to do network order byte swapping.
745 d_index (d_strchr.U):
746 This variable conditionally defines HAS_INDEX if index() and
747 rindex() are available for string searching.
749 d_inetaton (d_inetaton.U):
750 This variable conditionally defines the HAS_INET_ATON symbol, which
751 indicates to the C program that the inet_aton() function is available
752 to parse IP address "dotted-quad" strings.
754 d_int64t (i_inttypes.U):
755 This symbol will be defined if the C compiler supports int64_t.
757 d_iovec_s (i_sysuio.U):
758 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
759 which indicates that the struct iovec is supported.
761 d_isascii (d_isascii.U):
762 This variable conditionally defines the HAS_ISASCII constant,
763 which indicates to the C program that isascii() is available.
765 d_killpg (d_killpg.U):
766 This variable conditionally defines the HAS_KILLPG symbol, which
767 indicates to the C program that the killpg() routine is available
768 to kill process groups.
770 d_lchown (d_lchown.U):
771 This variable conditionally defines the HAS_LCHOWN symbol, which
772 indicates to the C program that the lchown() routine is available
773 to operate on a symbolic link (instead of following the link).
775 d_ldbl_dig (d_ldbl_dig.U):
776 This variable conditionally defines d_ldbl_dig if this system's
777 header files provide LDBL_DIG, which is the number of significant
778 digits in a long double precision number.
781 This variable conditionally defines HAS_LINK if link() is
782 available to create hard links.
785 This variable conditionally defines the HAS_LLSEEK symbol, which
786 indicates to the C program that the llseek() routine is available.
788 d_locconv (d_locconv.U):
789 This variable conditionally defines HAS_LOCALECONV if localeconv() is
790 available for numeric and monetary formatting conventions.
793 This variable conditionally defines HAS_LOCKF if lockf() is
794 available to do file locking.
796 d_longdbl (d_longdbl.U):
797 This variable conditionally defines HAS_LONG_DOUBLE if
798 the long double type is supported.
800 d_longlong (d_longlong.U):
801 This variable conditionally defines HAS_LONG_LONG if
802 the long long type is supported.
805 This variable conditionally defines HAS_LSTAT if lstat() is
806 available to do file stats on symbolic links.
808 d_madvise (d_madvise.U):
809 This variable conditionally defines HAS_MADVISE if madvise() is
810 available to map a file into memory.
813 This variable conditionally defines the HAS_MBLEN symbol, which
814 indicates to the C program that the mblen() routine is available
815 to find the number of bytes in a multibye character.
817 d_mbstowcs (d_mbstowcs.U):
818 This variable conditionally defines the HAS_MBSTOWCS symbol, which
819 indicates to the C program that the mbstowcs() routine is available
820 to convert a multibyte string into a wide character string.
822 d_mbtowc (d_mbtowc.U):
823 This variable conditionally defines the HAS_MBTOWC symbol, which
824 indicates to the C program that the mbtowc() routine is available
825 to convert multibyte to a wide character.
827 d_memchr (d_memchr.U):
828 This variable conditionally defines the HAS_MEMCHR symbol, which
829 indicates to the C program that the memchr() routine is available
830 to locate characters within a C string.
832 d_memcmp (d_memcmp.U):
833 This variable conditionally defines the HAS_MEMCMP symbol, which
834 indicates to the C program that the memcmp() routine is available
835 to compare blocks of memory.
837 d_memcpy (d_memcpy.U):
838 This variable conditionally defines the HAS_MEMCPY symbol, which
839 indicates to the C program that the memcpy() routine is available
840 to copy blocks of memory.
842 d_memmove (d_memmove.U):
843 This variable conditionally defines the HAS_MEMMOVE symbol, which
844 indicates to the C program that the memmove() routine is available
845 to copy potentatially overlapping blocks of memory.
847 d_memset (d_memset.U):
848 This variable conditionally defines the HAS_MEMSET symbol, which
849 indicates to the C program that the memset() routine is available
850 to set blocks of memory.
853 This variable conditionally defines the HAS_MKDIR symbol, which
854 indicates to the C program that the mkdir() routine is available
855 to create directories..
857 d_mkfifo (d_mkfifo.U):
858 This variable conditionally defines the HAS_MKFIFO symbol, which
859 indicates to the C program that the mkfifo() routine is available.
861 d_mktime (d_mktime.U):
862 This variable conditionally defines the HAS_MKTIME symbol, which
863 indicates to the C program that the mktime() routine is available.
866 This variable conditionally defines HAS_MMAP if mmap() is
867 available to map a file into memory.
869 d_mprotect (d_mprotect.U):
870 This variable conditionally defines HAS_MPROTECT if mprotect() is
871 available to modify the access protection of a memory mapped file.
874 This variable conditionally defines the HAS_MSG symbol, which
875 indicates that the entire msg*(2) library is present.
877 d_msg_ctrunc (d_socket.U):
878 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
879 which indicates that the MSG_CTRUNC is available. #ifdef is
880 not enough because it may be an enum, glibc has been known to do this.
882 d_msg_dontroute (d_socket.U):
883 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
884 which indicates that the MSG_DONTROUTE is available. #ifdef is
885 not enough because it may be an enum, glibc has been known to do this.
887 d_msg_oob (d_socket.U):
888 This variable conditionally defines the HAS_MSG_OOB symbol,
889 which indicates that the MSG_OOB is available. #ifdef is
890 not enough because it may be an enum, glibc has been known to do this.
892 d_msg_peek (d_socket.U):
893 This variable conditionally defines the HAS_MSG_PEEK symbol,
894 which indicates that the MSG_PEEK is available. #ifdef is
895 not enough because it may be an enum, glibc has been known to do this.
897 d_msg_proxy (d_socket.U):
898 This variable conditionally defines the HAS_MSG_PROXY symbol,
899 which indicates that the MSG_PROXY is available. #ifdef is
900 not enough because it may be an enum, glibc has been known to do this.
902 d_msgctl (d_msgctl.U):
903 This variable conditionally defines the HAS_MSGCTL symbol, which
904 indicates to the C program that the msgctl() routine is available.
906 d_msgget (d_msgget.U):
907 This variable conditionally defines the HAS_MSGGET symbol, which
908 indicates to the C program that the msgget() routine is available.
910 d_msghdr_s (d_socket.U):
911 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
912 which indicates that the struct msghdr is supported.
914 d_msgrcv (d_msgrcv.U):
915 This variable conditionally defines the HAS_MSGRCV symbol, which
916 indicates to the C program that the msgrcv() routine is available.
918 d_msgsnd (d_msgsnd.U):
919 This variable conditionally defines the HAS_MSGSND symbol, which
920 indicates to the C program that the msgsnd() routine is available.
923 This variable conditionally defines HAS_MSYNC if msync() is
924 available to synchronize a mapped file.
926 d_munmap (d_munmap.U):
927 This variable conditionally defines HAS_MUNMAP if munmap() is
928 available to unmap a region mapped by mmap().
930 d_mymalloc (mallocsrc.U):
931 This variable conditionally defines MYMALLOC in case other parts
932 of the source want to take special action if MYMALLOC is used.
933 This may include different sorts of profiling or error detection.
936 This variable conditionally defines the HAS_NICE symbol, which
937 indicates to the C program that the nice() routine is available.
940 This symbol will be defined if the C compiler supports off64_t.
942 d_old_pthread_create_joinable (d_pthrattrj.U):
943 This variable conditionally defines pthread_create_joinable.
944 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
946 d_oldpthreads (usethreads.U):
947 This variable conditionally defines the OLD_PTHREADS_API symbol,
948 and indicates that Perl should be built to use the old
949 draft POSIX threads API. This is only potentially meaningful if
952 d_oldsock (d_socket.U):
953 This variable conditionally defines the OLDSOCKET symbol, which
954 indicates that the BSD socket interface is based on 4.1c and not 4.2.
957 This variable conditionally defines the HAS_OPEN3 manifest constant,
958 which indicates to the C program that the 3 argument version of
959 the open(2) function is available.
961 d_pathconf (d_pathconf.U):
962 This variable conditionally defines the HAS_PATHCONF symbol, which
963 indicates to the C program that the pathconf() routine is available
964 to determine file-system related limits and options associated
965 with a given filename.
968 This variable conditionally defines the HAS_PAUSE symbol, which
969 indicates to the C program that the pause() routine is available
970 to suspend a process until a signal is received.
972 d_phostname (d_gethname.U):
973 This variable conditionally defines the HAS_PHOSTNAME symbol, which
974 contains the shell command which, when fed to popen(), may be
975 used to derive the host name.
978 This variable conditionally defines the HAS_PIPE symbol, which
979 indicates to the C program that the pipe() routine is available
980 to create an inter-process channel.
983 This variable conditionally defines the HAS_POLL symbol, which
984 indicates to the C program that the poll() routine is available
985 to poll active file descriptors.
987 d_portable (d_portable.U):
988 This variable conditionally defines the PORTABLE symbol, which
989 indicates to the C program that it should not assume that it is
990 running on the machine it was compiled on.
992 d_PRId64 (quadfio.U):
993 This variable conditionally defines the PERL_PRId64 symbol, which
994 indiciates that stdio has a symbol to print 64-bit decimal numbers.
996 d_PRIeldbl (longdblfio.U):
997 This variable conditionally defines the PERL_PRIfldlbl symbol, which
998 indiciates that stdio has a symbol to print long doubles.
1000 d_PRIEldbl (longdblfio.U):
1001 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1002 indiciates that stdio has a symbol to print long doubles.
1004 d_PRIfldbl (longdblfio.U):
1005 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1006 indiciates that stdio has a symbol to print long doubles.
1008 d_PRIFldbl (longdblfio.U):
1009 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1010 indiciates that stdio has a symbol to print long doubles.
1012 d_PRIgldbl (longdblfio.U):
1013 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1014 indiciates that stdio has a symbol to print long doubles.
1016 d_PRIGldbl (longdblfio.U):
1017 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1018 indiciates that stdio has a symbol to print long doubles.
1020 d_PRIi64 (quadfio.U):
1021 This variable conditionally defines the PERL_PRIi64 symbol, which
1022 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1024 d_PRIo64 (quadfio.U):
1025 This variable conditionally defines the PERL_PRIo64 symbol, which
1026 indiciates that stdio has a symbol to print 64-bit octal numbers.
1028 d_PRIu64 (quadfio.U):
1029 This variable conditionally defines the PERL_PRIu64 symbol, which
1030 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1033 d_PRIx64 (quadfio.U):
1034 This variable conditionally defines the PERL_PRIx64 symbol, which
1035 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1037 d_PRIX64 (quadfio.U):
1038 This variable conditionally defines the PERL_PRIX64 symbol, which
1039 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1041 d_pthread_yield (d_pthread_y.U):
1042 This variable conditionally defines the HAS_PTHREAD_YIELD
1043 symbol if the pthread_yield routine is available to yield
1044 the execution of the current thread.
1047 This variable conditionally defines PWAGE, which indicates
1048 that struct passwd contains pw_age.
1050 d_pwchange (i_pwd.U):
1051 This variable conditionally defines PWCHANGE, which indicates
1052 that struct passwd contains pw_change.
1054 d_pwclass (i_pwd.U):
1055 This variable conditionally defines PWCLASS, which indicates
1056 that struct passwd contains pw_class.
1058 d_pwcomment (i_pwd.U):
1059 This variable conditionally defines PWCOMMENT, which indicates
1060 that struct passwd contains pw_comment.
1062 d_pwexpire (i_pwd.U):
1063 This variable conditionally defines PWEXPIRE, which indicates
1064 that struct passwd contains pw_expire.
1066 d_pwgecos (i_pwd.U):
1067 This variable conditionally defines PWGECOS, which indicates
1068 that struct passwd contains pw_gecos.
1070 d_pwpasswd (i_pwd.U):
1071 This variable conditionally defines PWPASSWD, which indicates
1072 that struct passwd contains pw_passwd.
1074 d_pwquota (i_pwd.U):
1075 This variable conditionally defines PWQUOTA, which indicates
1076 that struct passwd contains pw_quota.
1078 d_readdir (d_readdir.U):
1079 This variable conditionally defines HAS_READDIR if readdir() is
1080 available to read directory entries.
1082 d_readlink (d_readlink.U):
1083 This variable conditionally defines the HAS_READLINK symbol, which
1084 indicates to the C program that the readlink() routine is available
1085 to read the value of a symbolic link.
1087 d_readv (d_readv.U):
1088 This variable conditionally defines the HAS_READV symbol, which
1089 indicates to the C program that the readv() routine is available.
1091 d_recvmsg (d_socket.U):
1092 This variable conditionally defines the HAS_RECVMSG symbol,
1093 which indicates that the recvmsg is supported.
1095 d_rename (d_rename.U):
1096 This variable conditionally defines the HAS_RENAME symbol, which
1097 indicates to the C program that the rename() routine is available
1100 d_rewinddir (d_readdir.U):
1101 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1104 d_rmdir (d_rmdir.U):
1105 This variable conditionally defines HAS_RMDIR if rmdir() is
1106 available to remove directories.
1108 d_safebcpy (d_safebcpy.U):
1109 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1110 the bcopy() routine can do overlapping copies.
1112 d_safemcpy (d_safemcpy.U):
1113 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1114 the memcpy() routine can do overlapping copies.
1116 d_sanemcmp (d_sanemcmp.U):
1117 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1118 the memcpy() routine is available and can be used to compare relative
1119 magnitudes of chars with their high bits set.
1121 d_sched_yield (d_pthread_y.U):
1122 This variable conditionally defines the HAS_SCHED_YIELD
1123 symbol if the sched_yield routine is available to yield
1124 the execution of the current thread.
1126 d_scm_rights (d_socket.U):
1127 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1128 which indicates that the SCM_RIGHTS is available. #ifdef is
1129 not enough because it may be an enum, glibc has been known to do this.
1131 d_seekdir (d_readdir.U):
1132 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1135 d_select (d_select.U):
1136 This variable conditionally defines HAS_SELECT if select() is
1137 available to select active file descriptors. A <sys/time.h>
1138 inclusion may be necessary for the timeout field.
1141 This variable conditionally defines the HAS_SEM symbol, which
1142 indicates that the entire sem*(2) library is present.
1144 d_semctl (d_semctl.U):
1145 This variable conditionally defines the HAS_SEMCTL symbol, which
1146 indicates to the C program that the semctl() routine is available.
1148 d_semctl_semid_ds (d_union_semun.U):
1149 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1150 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1152 d_semctl_semun (d_union_semun.U):
1153 This variable conditionally defines USE_SEMCTL_SEMUN, which
1154 indicates that union semun is to be used for semctl IPC_STAT.
1156 d_semget (d_semget.U):
1157 This variable conditionally defines the HAS_SEMGET symbol, which
1158 indicates to the C program that the semget() routine is available.
1160 d_semop (d_semop.U):
1161 This variable conditionally defines the HAS_SEMOP symbol, which
1162 indicates to the C program that the semop() routine is available.
1164 d_sendmsg (d_socket.U):
1165 This variable conditionally defines the HAS_SENDMSG symbol,
1166 which indicates that the sendmsg is supported.
1168 d_setegid (d_setegid.U):
1169 This variable conditionally defines the HAS_SETEGID symbol, which
1170 indicates to the C program that the setegid() routine is available
1171 to change the effective gid of the current program.
1173 d_seteuid (d_seteuid.U):
1174 This variable conditionally defines the HAS_SETEUID symbol, which
1175 indicates to the C program that the seteuid() routine is available
1176 to change the effective uid of the current program.
1178 d_setgrent (d_setgrent.U):
1179 This variable conditionally defines the HAS_SETGRENT symbol, which
1180 indicates to the C program that the setgrent() routine is available
1181 for initializing sequential access to the group database.
1183 d_setgrps (d_setgrps.U):
1184 This variable conditionally defines the HAS_SETGROUPS symbol, which
1185 indicates to the C program that the setgroups() routine is available
1186 to set the list of process groups.
1188 d_sethent (d_sethent.U):
1189 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1192 d_setlinebuf (d_setlnbuf.U):
1193 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1194 indicates to the C program that the setlinebuf() routine is available
1195 to change stderr or stdout from block-buffered or unbuffered to a
1198 d_setlocale (d_setlocale.U):
1199 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1200 available to handle locale-specific ctype implementations.
1202 d_setnent (d_setnent.U):
1203 This variable conditionally defines HAS_SETNETENT if setnetent() is
1206 d_setpent (d_setpent.U):
1207 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1210 d_setpgid (d_setpgid.U):
1211 This variable conditionally defines the HAS_SETPGID symbol if the
1212 setpgid(pid, gpid) function is available to set process group ID.
1214 d_setpgrp2 (d_setpgrp2.U):
1215 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1216 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1217 is available to set the current process group.
1219 d_setpgrp (d_setpgrp.U):
1220 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1221 available to set the current process group.
1223 d_setprior (d_setprior.U):
1224 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1225 is available to set a process's priority.
1227 d_setpwent (d_setpwent.U):
1228 This variable conditionally defines the HAS_SETPWENT symbol, which
1229 indicates to the C program that the setpwent() routine is available
1230 for initializing sequential access to the passwd database.
1232 d_setregid (d_setregid.U):
1233 This variable conditionally defines HAS_SETREGID if setregid() is
1234 available to change the real and effective gid of the current
1237 d_setresgid (d_setregid.U):
1238 This variable conditionally defines HAS_SETRESGID if setresgid() is
1239 available to change the real, effective and saved gid of the current
1242 d_setresuid (d_setreuid.U):
1243 This variable conditionally defines HAS_SETREUID if setresuid() is
1244 available to change the real, effective and saved uid of the current
1247 d_setreuid (d_setreuid.U):
1248 This variable conditionally defines HAS_SETREUID if setreuid() is
1249 available to change the real and effective uid of the current
1252 d_setrgid (d_setrgid.U):
1253 This variable conditionally defines the HAS_SETRGID symbol, which
1254 indicates to the C program that the setrgid() routine is available
1255 to change the real gid of the current program.
1257 d_setruid (d_setruid.U):
1258 This variable conditionally defines the HAS_SETRUID symbol, which
1259 indicates to the C program that the setruid() routine is available
1260 to change the real uid of the current program.
1262 d_setsent (d_setsent.U):
1263 This variable conditionally defines HAS_SETSERVENT if setservent() is
1266 d_setsid (d_setsid.U):
1267 This variable conditionally defines HAS_SETSID if setsid() is
1268 available to set the process group ID.
1270 d_setspent (d_setspent.U):
1271 This variable conditionally defines HAS_SETSPENT if setspent() is
1272 available to initialize the scan of SysV shadow password entries.
1274 d_setvbuf (d_setvbuf.U):
1275 This variable conditionally defines the HAS_SETVBUF symbol, which
1276 indicates to the C program that the setvbuf() routine is available
1277 to change buffering on an open stdio stream.
1280 This variable conditionally defines the USE_SFIO symbol,
1281 and indicates whether sfio is available (and should be used).
1284 This variable conditionally defines the HAS_SHM symbol, which
1285 indicates that the entire shm*(2) library is present.
1287 d_shmat (d_shmat.U):
1288 This variable conditionally defines the HAS_SHMAT symbol, which
1289 indicates to the C program that the shmat() routine is available.
1291 d_shmatprototype (d_shmat.U):
1292 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1293 symbol, which indicates that sys/shm.h has a prototype for
1296 d_shmctl (d_shmctl.U):
1297 This variable conditionally defines the HAS_SHMCTL symbol, which
1298 indicates to the C program that the shmctl() routine is available.
1300 d_shmdt (d_shmdt.U):
1301 This variable conditionally defines the HAS_SHMDT symbol, which
1302 indicates to the C program that the shmdt() routine is available.
1304 d_shmget (d_shmget.U):
1305 This variable conditionally defines the HAS_SHMGET symbol, which
1306 indicates to the C program that the shmget() routine is available.
1308 d_sigaction (d_sigaction.U):
1309 This variable conditionally defines the HAS_SIGACTION symbol, which
1310 indicates that the Vr4 sigaction() routine is available.
1312 d_sigsetjmp (d_sigsetjmp.U):
1313 This variable conditionally defines the HAS_SIGSETJMP symbol,
1314 which indicates that the sigsetjmp() routine is available to
1315 call setjmp() and optionally save the process's signal mask.
1317 d_socket (d_socket.U):
1318 This variable conditionally defines HAS_SOCKET, which indicates
1319 that the BSD socket interface is supported.
1321 d_sockpair (d_socket.U):
1322 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1323 indicates that the BSD socketpair() is supported.
1325 d_sqrtl (d_sqrtl.U):
1326 This variable conditionally defines the HAS_SQRTL symbol, which
1327 indicates to the C program that the sqrtl() routine is available.
1329 d_statblks (d_statblks.U):
1330 This variable conditionally defines USE_STAT_BLOCKS
1331 if this system has a stat structure declaring
1332 st_blksize and st_blocks.
1334 d_statfs (d_statfs.U):
1335 This variable conditionally defines the HAS_STATFS symbol, which
1336 indicates to the C program that the statfs() routine is available.
1338 d_statfs_f_flags (d_statfs.U):
1339 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1340 symbol, which indicates to struct statfs from has f_flags member.
1341 This kind of struct statfs is coming from sys/mount.h (BSD),
1342 not from sys/statfs.h (SYSV).
1344 d_statfs_s (d_statfs.U):
1345 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1346 which indicates that the struct statfs is supported.
1348 d_statvfs (d_statvfs.U):
1349 This variable conditionally defines the HAS_STATVFS symbol, which
1350 indicates to the C program that the statvfs() routine is available.
1352 d_stdio_cnt_lval (d_stdstdio.U):
1353 This variable conditionally defines STDIO_CNT_LVALUE if the
1354 FILE_cnt macro can be used as an lvalue.
1356 d_stdio_ptr_lval (d_stdstdio.U):
1357 This variable conditionally defines STDIO_PTR_LVALUE if the
1358 FILE_ptr macro can be used as an lvalue.
1360 d_stdio_stream_array (stdio_streams.U):
1361 This variable tells whether there is an array holding
1364 d_stdiobase (d_stdstdio.U):
1365 This variable conditionally defines USE_STDIO_BASE if this system
1366 has a FILE structure declaring a usable _base field (or equivalent)
1369 d_stdstdio (d_stdstdio.U):
1370 This variable conditionally defines USE_STDIO_PTR if this system
1371 has a FILE structure declaring usable _ptr and _cnt fields (or
1372 equivalent) in stdio.h.
1374 d_strchr (d_strchr.U):
1375 This variable conditionally defines HAS_STRCHR if strchr() and
1376 strrchr() are available for string searching.
1378 d_strcoll (d_strcoll.U):
1379 This variable conditionally defines HAS_STRCOLL if strcoll() is
1380 available to compare strings using collating information.
1382 d_strctcpy (d_strctcpy.U):
1383 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1384 indicates to the C program that this C compiler knows how to copy
1387 d_strerrm (d_strerror.U):
1388 This variable holds what Strerrr is defined as to translate an error
1389 code condition into an error message string. It could be 'strerror'
1390 or a more complex macro emulating strrror with sys_errlist[], or the
1391 "unknown" string when both strerror and sys_errlist are missing.
1393 d_strerror (d_strerror.U):
1394 This variable conditionally defines HAS_STRERROR if strerror() is
1395 available to translate error numbers to strings.
1397 d_strtod (d_strtod.U):
1398 This variable conditionally defines the HAS_STRTOD symbol, which
1399 indicates to the C program that the strtod() routine is available
1400 to provide better numeric string conversion than atof().
1402 d_strtol (d_strtol.U):
1403 This variable conditionally defines the HAS_STRTOL symbol, which
1404 indicates to the C program that the strtol() routine is available
1405 to provide better numeric string conversion than atoi() and friends.
1407 d_strtoul (d_strtoul.U):
1408 This variable conditionally defines the HAS_STRTOUL symbol, which
1409 indicates to the C program that the strtoul() routine is available
1410 to provide conversion of strings to unsigned long.
1412 d_strtoull (strtoull.U):
1413 This variable conditionally defines the HAS_STRTOULL symbol, which
1414 indicates to the C program that the strtoull() routine is available.
1416 d_strxfrm (d_strxfrm.U):
1417 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1418 available to transform strings.
1420 d_suidsafe (d_dosuid.U):
1421 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1422 if setuid scripts can be secure. This test looks in /dev/fd/.
1424 d_symlink (d_symlink.U):
1425 This variable conditionally defines the HAS_SYMLINK symbol, which
1426 indicates to the C program that the symlink() routine is available
1427 to create symbolic links.
1429 d_syscall (d_syscall.U):
1430 This variable conditionally defines HAS_SYSCALL if syscall() is
1431 available call arbitrary system calls.
1433 d_sysconf (d_sysconf.U):
1434 This variable conditionally defines the HAS_SYSCONF symbol, which
1435 indicates to the C program that the sysconf() routine is available
1436 to determine system related limits and options.
1438 d_sysernlst (d_strerror.U):
1439 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1440 is available to translate error numbers to the symbolic name.
1442 d_syserrlst (d_strerror.U):
1443 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1444 available to translate error numbers to strings.
1446 d_system (d_system.U):
1447 This variable conditionally defines HAS_SYSTEM if system() is
1448 available to issue a shell command.
1450 d_tcgetpgrp (d_tcgtpgrp.U):
1451 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1452 indicates to the C program that the tcgetpgrp() routine is available.
1453 to get foreground process group ID.
1455 d_tcsetpgrp (d_tcstpgrp.U):
1456 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1457 indicates to the C program that the tcsetpgrp() routine is available
1458 to set foreground process group ID.
1460 d_telldir (d_readdir.U):
1461 This variable conditionally defines HAS_TELLDIR if telldir() is
1464 d_telldirproto (d_telldirproto.U):
1465 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1466 which indicates to the C program that the system provides
1467 a prototype for the telldir() function. Otherwise, it is
1468 up to the program to supply one.
1471 This variable conditionally defines the HAS_TIME symbol, which indicates
1472 that the time() routine exists. The time() routine is normaly
1473 provided on UNIX systems.
1475 d_times (d_times.U):
1476 This variable conditionally defines the HAS_TIMES symbol, which indicates
1477 that the times() routine exists. The times() routine is normaly
1478 provided on UNIX systems. You may have to include <sys/times.h>.
1480 d_truncate (d_truncate.U):
1481 This variable conditionally defines HAS_TRUNCATE if truncate() is
1482 available to truncate files.
1484 d_tzname (d_tzname.U):
1485 This variable conditionally defines HAS_TZNAME if tzname[] is
1486 available to access timezone names.
1488 d_umask (d_umask.U):
1489 This variable conditionally defines the HAS_UMASK symbol, which
1490 indicates to the C program that the umask() routine is available.
1491 to set and get the value of the file creation mask.
1493 d_uname (d_gethname.U):
1494 This variable conditionally defines the HAS_UNAME symbol, which
1495 indicates to the C program that the uname() routine may be
1496 used to derive the host name.
1498 d_union_semun (d_union_semun.U):
1499 This variable conditionally defines HAS_UNION_SEMUN if the
1500 union semun is defined by including <sys/sem.h>.
1502 d_ustat (d_ustat.U):
1503 This variable conditionally defines HAS_USTAT if ustat() is
1504 available to query file system statistics by dev_t.
1506 d_vendorbin (vendorbin.U):
1507 This variable conditionally defines PERL_VENDORBIN.
1509 d_vendorlib (vendorlib.U):
1510 This variable conditionally defines PERL_VENDORLIB.
1512 d_vfork (d_vfork.U):
1513 This variable conditionally defines the HAS_VFORK symbol, which
1514 indicates the vfork() routine is available.
1516 d_void_closedir (d_closedir.U):
1517 This variable conditionally defines VOID_CLOSEDIR if closedir()
1518 does not return a value.
1520 d_voidsig (d_voidsig.U):
1521 This variable conditionally defines VOIDSIG if this system
1522 declares "void (*signal(...))()" in signal.h. The old way was to
1523 declare it as "int (*signal(...))()".
1525 d_voidtty (i_sysioctl.U):
1526 This variable conditionally defines USE_IOCNOTTY to indicate that the
1527 ioctl() call with TIOCNOTTY should be used to void tty association.
1528 Otherwise (on USG probably), it is enough to close the standard file
1529 decriptors and do a setpgrp().
1531 d_volatile (d_volatile.U):
1532 This variable conditionally defines the HASVOLATILE symbol, which
1533 indicates to the C program that this C compiler knows about the
1534 volatile declaration.
1536 d_vprintf (d_vprintf.U):
1537 This variable conditionally defines the HAS_VPRINTF symbol, which
1538 indicates to the C program that the vprintf() routine is available
1539 to printf with a pointer to an argument list.
1541 d_wait4 (d_wait4.U):
1542 This variable conditionally defines the HAS_WAIT4 symbol, which
1543 indicates the wait4() routine is available.
1545 d_waitpid (d_waitpid.U):
1546 This variable conditionally defines HAS_WAITPID if waitpid() is
1547 available to wait for child process.
1549 d_wcstombs (d_wcstombs.U):
1550 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1551 indicates to the C program that the wcstombs() routine is available
1552 to convert wide character strings to multibyte strings.
1554 d_wctomb (d_wctomb.U):
1555 This variable conditionally defines the HAS_WCTOMB symbol, which
1556 indicates to the C program that the wctomb() routine is available
1557 to convert a wide character to a multibyte.
1559 d_writev (d_writev.U):
1560 This variable conditionally defines the HAS_WRITEV symbol, which
1561 indicates to the C program that the writev() routine is available.
1564 This variable conditionally defines the symbol XENIX, which alerts
1565 the C program that it runs under Xenix.
1568 This variable is used internally by Configure to determine the
1569 full pathname (if any) of the date program. After Configure runs,
1570 the value is reset to a plain "date" and is not useful.
1572 db_hashtype (i_db.U):
1573 This variable contains the type of the hash structure element
1574 in the <db.h> header file. In older versions of DB, it was
1575 int, while in newer ones it is u_int32_t.
1577 db_prefixtype (i_db.U):
1578 This variable contains the type of the prefix structure element
1579 in the <db.h> header file. In older versions of DB, it was
1580 int, while in newer ones it is size_t.
1582 defvoidused (voidflags.U):
1583 This variable contains the default value of the VOIDUSED symbol (15).
1585 direntrytype (i_dirent.U):
1586 This symbol is set to 'struct direct' or 'struct dirent' depending on
1587 whether dirent is available or not. You should use this pseudo type to
1588 portably declare your directory entries.
1591 This variable contains the extension that is to be used for the
1592 dynamically loaded modules that perl generaties.
1595 This variable contains the name of the dynamic loading file that
1596 will be used with the package.
1598 doublesize (doublesize.U):
1599 This variable contains the value of the DOUBLESIZE symbol, which
1600 indicates to the C program how many bytes there are in a double.
1602 drand01 (randfunc.U):
1603 Indicates the macro to be used to generate normalized
1604 random numbers. Uses randfunc, often divided by
1605 (double) (((unsigned long) 1 << randbits)) in order to
1606 normalize the result.
1607 In C programs, the macro 'Drand01' is mapped to drand01.
1609 dynamic_ext (Extensions.U):
1610 This variable holds a list of XS extension files we want to
1611 link dynamically into the package. It is used by Makefile.
1613 eagain (nblock_io.U):
1614 This variable bears the symbolic errno code set by read() when no
1615 data is present on the file and non-blocking I/O was enabled (otherwise,
1616 read() blocks naturally).
1619 This variable conditionally defines EBCDIC if this
1620 system uses EBCDIC encoding. Among other things, this
1621 means that the character ranges are not contiguous.
1625 This variable is used internally by Configure to determine the
1626 full pathname (if any) of the echo program. After Configure runs,
1627 the value is reset to a plain "echo" and is not useful.
1630 This variable is used internally by Configure to determine the
1631 full pathname (if any) of the egrep program. After Configure runs,
1632 the value is reset to a plain "egrep" and is not useful.
1635 This variable is defined but not used by Configure.
1636 The value is a plain '' and is not useful.
1639 When running under Eunice this variable contains a command which will
1640 convert a shell script to the proper form of text file for it to be
1641 executable by the shell. On other systems it is a no-op.
1644 This is an old synonym for _exe.
1647 This variable is used internally by Configure to determine the
1648 full pathname (if any) of the expr program. After Configure runs,
1649 the value is reset to a plain "expr" and is not useful.
1651 extensions (Extensions.U):
1652 This variable holds a list of all extension files (both XS and
1653 non-xs linked into the package. It is propagated to Config.pm
1654 and is typically used to test whether a particular extesion
1657 fflushall (fflushall.U):
1658 This symbol, if defined, tells that to flush
1659 all pending stdio output one must loop through all
1660 the stdio file handles stored in an array and fflush them.
1661 Note that if fflushNULL is defined, fflushall will not
1662 even be probed for and will be left undefined.
1664 fflushNULL (fflushall.U):
1665 This symbol, if defined, tells that fflush(NULL) does flush
1666 all pending stdio output.
1669 This variable is defined but not used by Configure.
1670 The value is a plain '' and is not useful.
1672 firstmakefile (Unix.U):
1673 This variable defines the first file searched by make. On unix,
1674 it is makefile (then Makefile). On case-insensitive systems,
1675 it might be something else. This is only used to deal with
1676 convoluted make depend tricks.
1679 This variable is defined but not used by Configure.
1680 The value is a plain '' and is not useful.
1682 fpostype (fpostype.U):
1683 This variable defines Fpos_t to be something like fpost_t, long,
1684 uint, or whatever type is used to declare file positions in libc.
1686 freetype (mallocsrc.U):
1687 This variable contains the return type of free(). It is usually
1688 void, but occasionally int.
1691 This variable contains the full pathname to 'ar', whether or
1692 not the user has specified 'portability'. This is only used
1696 This variable contains the full pathname to 'csh', whether or
1697 not the user has specified 'portability'. This is only used
1698 in the compiled C program, and we assume that all systems which
1699 can share this executable will have the same full pathname to
1702 full_sed (Loc_sed.U):
1703 This variable contains the full pathname to 'sed', whether or
1704 not the user has specified 'portability'. This is only used
1705 in the compiled C program, and we assume that all systems which
1706 can share this executable will have the same full pathname to
1710 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1711 indicate whether the compiler is version 1 or 2. This is used in
1712 setting some of the default cflags. It is set to '' if not gcc.
1714 gidtype (gidtype.U):
1715 This variable defines Gid_t to be something like gid_t, int,
1716 ushort, or whatever type is used to declare the return type
1717 of getgid(). Typically, it is the type of group ids in the kernel.
1720 This variable holds the general path (space-separated) used to
1721 find libraries. It may contain directories that do not exist on
1722 this platform, libpth is the cleaned-up version.
1725 This variable is used internally by Configure to determine the
1726 full pathname (if any) of the grep program. After Configure runs,
1727 the value is reset to a plain "grep" and is not useful.
1730 This variable contains a command that produces the text of the
1731 /etc/group file. This is normally "cat /etc/group", but can be
1732 "ypcat group" when NIS is used.
1734 groupstype (groupstype.U):
1735 This variable defines Groups_t to be something like gid_t, int,
1736 ushort, or whatever type is used for the second argument to
1737 getgroups() and setgroups(). Usually, this is the same as
1738 gidtype (gid_t), but sometimes it isn't.
1741 This variable is used internally by Configure to determine the
1742 full pathname (if any) of the gzip program. After Configure runs,
1743 the value is reset to a plain "gzip" and is not useful.
1745 h_fcntl (h_fcntl.U):
1746 This is variable gets set in various places to tell i_fcntl that
1747 <fcntl.h> should be included.
1749 h_sysfile (h_sysfile.U):
1750 This is variable gets set in various places to tell i_sys_file that
1751 <sys/file.h> should be included.
1754 Gives the type of hints used for previous answers. May be one of
1755 "default", "recommended" or "previous".
1758 This variable contains a command that produces the text of the
1759 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1760 "ypcat hosts" when NIS is used.
1763 This variable contains a flag which will tell the C compiler and loader
1764 to produce a program running with a huge memory model. If the
1765 huge model is not supported, contains the flag to produce large
1766 model programs. It is up to the Makefile to use this.
1768 i_arpainet (i_arpainet.U):
1769 This variable conditionally defines the I_ARPA_INET symbol,
1770 and indicates whether a C program should include <arpa/inet.h>.
1772 i_bsdioctl (i_sysioctl.U):
1773 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1774 indicates to the C program that <sys/bsdioctl.h> exists and should
1778 This variable conditionally defines the I_DB symbol, and indicates
1779 whether a C program may include Berkeley's DB include file <db.h>.
1782 This variable conditionally defines the I_DBM symbol, which
1783 indicates to the C program that <dbm.h> exists and should
1786 i_dirent (i_dirent.U):
1787 This variable conditionally defines I_DIRENT, which indicates
1788 to the C program that it should include <dirent.h>.
1791 This variable conditionally defines the I_DLD symbol, which
1792 indicates to the C program that <dld.h> (GNU dynamic loading)
1793 exists and should be included.
1795 i_dlfcn (i_dlfcn.U):
1796 This variable conditionally defines the I_DLFCN symbol, which
1797 indicates to the C program that <dlfcn.h> exists and should
1800 i_fcntl (i_fcntl.U):
1801 This variable controls the value of I_FCNTL (which tells
1802 the C program to include <fcntl.h>).
1804 i_float (i_float.U):
1805 This variable conditionally defines the I_FLOAT symbol, and indicates
1806 whether a C program may include <float.h> to get symbols like DBL_MAX
1807 or DBL_MIN, i.e. machine dependent floating point values.
1810 This variable conditionally defines the I_GDBM symbol, which
1811 indicates to the C program that <gdbm.h> exists and should
1815 This variable conditionally defines the I_GRP symbol, and indicates
1816 whether a C program should include <grp.h>.
1818 i_inttypes (i_inttypes.U):
1819 This variable conditionally defines the I_INTTYPES symbol,
1820 and indicates whether a C program should include <inttypes.h>.
1822 i_limits (i_limits.U):
1823 This variable conditionally defines the I_LIMITS symbol, and indicates
1824 whether a C program may include <limits.h> to get symbols like WORD_BIT
1827 i_locale (i_locale.U):
1828 This variable conditionally defines the I_LOCALE symbol,
1829 and indicates whether a C program should include <locale.h>.
1831 i_machcthr (i_machcthr.U):
1832 This variable conditionally defines the I_MACH_CTHREADS symbol,
1833 and indicates whether a C program should include <mach/cthreads.h>.
1835 i_malloc (i_malloc.U):
1836 This variable conditionally defines the I_MALLOC symbol, and indicates
1837 whether a C program should include <malloc.h>.
1840 This variable conditionally defines the I_MATH symbol, and indicates
1841 whether a C program may include <math.h>.
1843 i_memory (i_memory.U):
1844 This variable conditionally defines the I_MEMORY symbol, and indicates
1845 whether a C program should include <memory.h>.
1847 i_mntent (i_mntent.U):
1848 This variable conditionally defines the I_MNTENT symbol, and indicates
1849 whether a C program should include <mntent.h>.
1852 This variable conditionally defines the I_NDBM symbol, which
1853 indicates to the C program that <ndbm.h> exists and should
1856 i_netdb (i_netdb.U):
1857 This variable conditionally defines the I_NETDB symbol, and indicates
1858 whether a C program should include <netdb.h>.
1860 i_neterrno (i_neterrno.U):
1861 This variable conditionally defines the I_NET_ERRNO symbol, which
1862 indicates to the C program that <net/errno.h> exists and should
1865 i_netinettcp (i_netinettcp.U):
1866 This variable conditionally defines the I_NETINET_TCP symbol,
1867 and indicates whether a C program should include <netinet/tcp.h>.
1870 This variable conditionally defines I_NETINET_IN, which indicates
1871 to the C program that it should include <netinet/in.h>. Otherwise,
1872 you may try <sys/in.h>.
1875 This variable conditionally defines the I_POLL symbol, and indicates
1876 whether a C program should include <poll.h>.
1878 i_pthread (i_pthread.U):
1879 This variable conditionally defines the I_PTHREAD symbol,
1880 and indicates whether a C program should include <pthread.h>.
1883 This variable conditionally defines I_PWD, which indicates
1884 to the C program that it should include <pwd.h>.
1886 i_rpcsvcdbm (i_dbm.U):
1887 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1888 indicates to the C program that <rpcsvc/dbm.h> exists and should
1889 be included. Some System V systems might need this instead of <dbm.h>.
1892 This variable conditionally defines the I_SFIO symbol,
1893 and indicates whether a C program should include <sfio.h>.
1895 i_sgtty (i_termio.U):
1896 This variable conditionally defines the I_SGTTY symbol, which
1897 indicates to the C program that it should include <sgtty.h> rather
1900 i_shadow (i_shadow.U):
1901 This variable conditionally defines the I_SHADOW symbol, and indicates
1902 whether a C program should include <shadow.h>.
1904 i_socks (i_socks.U):
1905 This variable conditionally defines the I_SOCKS symbol, and indicates
1906 whether a C program should include <socks.h>.
1908 i_stdarg (i_varhdr.U):
1909 This variable conditionally defines the I_STDARG symbol, which
1910 indicates to the C program that <stdarg.h> exists and should
1913 i_stddef (i_stddef.U):
1914 This variable conditionally defines the I_STDDEF symbol, which
1915 indicates to the C program that <stddef.h> exists and should
1918 i_stdlib (i_stdlib.U):
1919 This variable conditionally defines the I_STDLIB symbol, which
1920 indicates to the C program that <stdlib.h> exists and should
1923 i_string (i_string.U):
1924 This variable conditionally defines the I_STRING symbol, which
1925 indicates that <string.h> should be included rather than <strings.h>.
1927 i_sysaccess (i_sysaccess.U):
1928 This variable conditionally defines the I_SYS_ACCESS symbol,
1929 and indicates whether a C program should include <sys/access.h>.
1931 i_sysdir (i_sysdir.U):
1932 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1933 whether a C program should include <sys/dir.h>.
1935 i_sysfile (i_sysfile.U):
1936 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1937 whether a C program should include <sys/file.h> to get R_OK and friends.
1939 i_sysfilio (i_sysioctl.U):
1940 This variable conditionally defines the I_SYS_FILIO symbol, which
1941 indicates to the C program that <sys/filio.h> exists and should
1942 be included in preference to <sys/ioctl.h>.
1945 This variable conditionally defines I_SYS_IN, which indicates
1946 to the C program that it should include <sys/in.h> instead of
1949 i_sysioctl (i_sysioctl.U):
1950 This variable conditionally defines the I_SYS_IOCTL symbol, which
1951 indicates to the C program that <sys/ioctl.h> exists and should
1954 i_sysmman (i_sysmman.U):
1955 This variable conditionally defines the I_SYS_MMAN symbol, and
1956 indicates whether a C program should include <sys/mman.h>.
1958 i_sysmount (i_sysmount.U):
1959 This variable conditionally defines the I_SYSMOUNT symbol,
1960 and indicates whether a C program should include <sys/mount.h>.
1962 i_sysndir (i_sysndir.U):
1963 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1964 whether a C program should include <sys/ndir.h>.
1966 i_sysparam (i_sysparam.U):
1967 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1968 whether a C program should include <sys/param.h>.
1970 i_sysresrc (i_sysresrc.U):
1971 This variable conditionally defines the I_SYS_RESOURCE symbol,
1972 and indicates whether a C program should include <sys/resource.h>.
1974 i_syssecrt (i_syssecrt.U):
1975 This variable conditionally defines the I_SYS_SECURITY symbol,
1976 and indicates whether a C program should include <sys/security.h>.
1978 i_sysselct (i_sysselct.U):
1979 This variable conditionally defines I_SYS_SELECT, which indicates
1980 to the C program that it should include <sys/select.h> in order to
1981 get the definition of struct timeval.
1983 i_syssockio (i_sysioctl.U):
1984 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1985 C program that socket ioctl codes may be found in <sys/sockio.h>
1986 instead of <sys/ioctl.h>.
1988 i_sysstat (i_sysstat.U):
1989 This variable conditionally defines the I_SYS_STAT symbol,
1990 and indicates whether a C program should include <sys/stat.h>.
1992 i_sysstatfs (i_sysstatfs.U):
1993 This variable conditionally defines the I_SYSSTATFS symbol,
1994 and indicates whether a C program should include <sys/statfs.h>.
1996 i_sysstatvfs (i_sysstatvfs.U):
1997 This variable conditionally defines the I_SYSSTATVFS symbol,
1998 and indicates whether a C program should include <sys/statvfs.h>.
2000 i_systime (i_time.U):
2001 This variable conditionally defines I_SYS_TIME, which indicates
2002 to the C program that it should include <sys/time.h>.
2004 i_systimek (i_time.U):
2005 This variable conditionally defines I_SYS_TIME_KERNEL, which
2006 indicates to the C program that it should include <sys/time.h>
2007 with KERNEL defined.
2009 i_systimes (i_systimes.U):
2010 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2011 whether a C program should include <sys/times.h>.
2013 i_systypes (i_systypes.U):
2014 This variable conditionally defines the I_SYS_TYPES symbol,
2015 and indicates whether a C program should include <sys/types.h>.
2017 i_sysuio (i_sysuio.U):
2018 This variable conditionally defines the I_SYSUIO symbol, and indicates
2019 whether a C program should include <sys/uio.h>.
2021 i_sysun (i_sysun.U):
2022 This variable conditionally defines I_SYS_UN, which indicates
2023 to the C program that it should include <sys/un.h> to get UNIX
2024 domain socket definitions.
2026 i_sysvfs (i_sysvfs.U):
2027 This variable conditionally defines the I_SYSVFS symbol,
2028 and indicates whether a C program should include <sys/vfs.h>.
2030 i_syswait (i_syswait.U):
2031 This variable conditionally defines I_SYS_WAIT, which indicates
2032 to the C program that it should include <sys/wait.h>.
2034 i_termio (i_termio.U):
2035 This variable conditionally defines the I_TERMIO symbol, which
2036 indicates to the C program that it should include <termio.h> rather
2039 i_termios (i_termio.U):
2040 This variable conditionally defines the I_TERMIOS symbol, which
2041 indicates to the C program that the POSIX <termios.h> file is
2045 This variable conditionally defines I_TIME, which indicates
2046 to the C program that it should include <time.h>.
2048 i_unistd (i_unistd.U):
2049 This variable conditionally defines the I_UNISTD symbol, and indicates
2050 whether a C program should include <unistd.h>.
2052 i_ustat (i_ustat.U):
2053 This variable conditionally defines the I_USTAT symbol, and indicates
2054 whether a C program should include <ustat.h>.
2056 i_utime (i_utime.U):
2057 This variable conditionally defines the I_UTIME symbol, and indicates
2058 whether a C program should include <utime.h>.
2060 i_values (i_values.U):
2061 This variable conditionally defines the I_VALUES symbol, and indicates
2062 whether a C program may include <values.h> to get symbols like MAXLONG
2065 i_varargs (i_varhdr.U):
2066 This variable conditionally defines I_VARARGS, which indicates
2067 to the C program that it should include <varargs.h>.
2069 i_varhdr (i_varhdr.U):
2070 Contains the name of the header to be included to get va_dcl definition.
2071 Typically one of varargs.h or stdarg.h.
2073 i_vfork (i_vfork.U):
2074 This variable conditionally defines the I_VFORK symbol, and indicates
2075 whether a C program should include vfork.h.
2077 ignore_versioned_solibs (libs.U):
2078 This variable should be non-empty if non-versioned shared
2079 libraries (libfoo.so.x.y) are to be ignored (because they
2080 cannot be linked against).
2083 This variable must preceed the normal include path to get hte
2084 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2085 Value can be "" or "/bsd43" on mips.
2088 This variable is defined but not used by Configure.
2089 The value is a plain '' and is not useful.
2091 installarchlib (archlib.U):
2092 This variable is really the same as archlibexp but may differ on
2093 those systems using AFS. For extra portability, only this variable
2094 should be used in makefiles.
2097 This variable is the same as binexp unless AFS is running in which case
2098 the user is explicitely prompted for it. This variable should always
2099 be used in your makefiles for maximum portability.
2101 installman1dir (man1dir.U):
2102 This variable is really the same as man1direxp, unless you are using
2103 AFS in which case it points to the read/write location whereas
2104 man1direxp only points to the read-only access location. For extra
2105 portability, you should only use this variable within your makefiles.
2107 installman3dir (man3dir.U):
2108 This variable is really the same as man3direxp, unless you are using
2109 AFS in which case it points to the read/write location whereas
2110 man3direxp only points to the read-only access location. For extra
2111 portability, you should only use this variable within your makefiles.
2113 installprefix (installprefix.U):
2114 This variable holds the name of the directory below which
2115 "make install" will install the package. For most users, this
2116 is the same as prefix. However, it is useful for
2117 installing the software into a different (usually temporary)
2118 location after which it can be bundled up and moved somehow
2119 to the final location specified by prefix.
2121 installprefixexp (installprefix.U):
2122 This variable holds the full absolute path of installprefix
2123 with all ~-expansion done.
2125 installprivlib (privlib.U):
2126 This variable is really the same as privlibexp but may differ on
2127 those systems using AFS. For extra portability, only this variable
2128 should be used in makefiles.
2130 installscript (scriptdir.U):
2131 This variable is usually the same as scriptdirexp, unless you are on
2132 a system running AFS, in which case they may differ slightly. You
2133 should always use this variable within your makefiles for portability.
2135 installsitearch (sitearch.U):
2136 This variable is really the same as sitearchexp but may differ on
2137 those systems using AFS. For extra portability, only this variable
2138 should be used in makefiles.
2140 installsitebin (sitebin.U):
2141 This variable is usually the same as sitebinexp, unless you are on
2142 a system running AFS, in which case they may differ slightly. You
2143 should always use this variable within your makefiles for portability.
2145 installsitelib (sitelib.U):
2146 This variable is really the same as sitelibexp but may differ on
2147 those systems using AFS. For extra portability, only this variable
2148 should be used in makefiles.
2150 installstyle (installstyle.U):
2151 This variable describes the "style" of the perl installation.
2152 This is intended to be useful for tools that need to
2153 manipulate entire perl distributions. Perl itself doesn't use
2154 this to find its libraries -- the library directories are
2155 stored directly in Config.pm. Currently, there are only two
2156 styles: "lib" and "lib/perl5". The default library locations
2157 (e.g. privlib, sitelib) are either $prefix/lib or
2158 $prefix/lib/perl5. The former is useful if $prefix is a
2159 directory dedicated to perl (e.g. /opt/perl), while the latter
2160 is useful if $prefix is shared by many packages, e.g. if
2162 This may later be extended to include other information, so
2163 be careful with pattern-matching on the results.
2164 For compatibility with perl5.005 and earlier, the default
2165 setting is based on whether or not $prefix contains the string
2168 installusrbinperl (instubperl.U):
2169 This variable tells whether Perl should be installed also as
2170 /usr/bin/perl in addition to
2173 installvendorbin (vendorbin.U):
2174 This variable is really the same as vendorbinexp but may differ on
2175 those systems using AFS. For extra portability, only this variable
2176 should be used in makefiles.
2178 installvendorlib (vendorlib.U):
2179 This variable is really the same as vendorlibexp but may differ on
2180 those systems using AFS. For extra portability, only this variable
2181 should be used in makefiles.
2183 intsize (intsize.U):
2184 This variable contains the value of the INTSIZE symbol, which
2185 indicates to the C program how many bytes there are in an int.
2187 known_extensions (Extensions.U):
2188 This variable holds a list of all XS extensions included in
2192 This variable is defined but not used by Configure.
2193 The value is a plain '' and is not useful.
2196 This variable contains a flag which will tell the C compiler and loader
2197 to produce a program running with a large memory model. It is up to
2198 the Makefile to use this.
2201 This variable indicates the program to be used to link
2202 libraries for dynamic loading. On some systems, it is 'ld'.
2203 On ELF systems, it should be $cc. Mostly, we'll try to respect
2204 the hint file setting.
2206 lddlflags (dlsrc.U):
2207 This variable contains any special flags that might need to be
2208 passed to $ld to create a shared library suitable for dynamic
2209 loading. It is up to the makefile to use it. For hpux, it
2210 should be '-b'. For sunos 4.1, it is empty.
2212 ldflags (ccflags.U):
2213 This variable contains any additional C loader flags desired by
2214 the user. It is up to the Makefile to use this.
2216 ldlibpthname (libperl.U):
2217 This variable holds the name of the shared library
2218 search path, often LD_LIBRARY_PATH. To get an empty
2219 string, the hints file must set this to 'none'.
2222 This variable is used internally by Configure to determine the
2223 full pathname (if any) of the less program. After Configure runs,
2224 the value is reset to a plain "less" and is not useful.
2227 This is an old synonym for _a.
2230 This variable contains the location of the C library.
2232 libperl (libperl.U):
2233 The perl executable is obtained by linking perlmain.c with
2234 libperl, any static extensions (usually just DynaLoader),
2235 and any other libraries needed on this system. libperl
2236 is usually libperl.a, but can also be libperl.so.xxx if
2237 the user wishes to build a perl executable with a shared
2241 This variable holds the general path (space-separated) used to find
2242 libraries. It is intended to be used by other units.
2245 This variable holds the additional libraries we want to use.
2246 It is up to the Makefile to deal with it.
2248 libswanted (Myinit.U):
2249 This variable holds a list of all the libraries we want to
2250 search. The order is chosen to pick up the c library
2251 ahead of ucb or bsd libraries for SVR4.
2254 This variable is defined but not used by Configure.
2255 The value is a plain '' and is not useful.
2258 This variable is defined but not used by Configure.
2259 The value is a plain '' and is not useful.
2261 lkflags (ccflags.U):
2262 This variable contains any additional C partial linker flags desired by
2263 the user. It is up to the Makefile to use this.
2266 This variable is used internally by Configure to determine the
2267 full pathname (if any) of the ln program. After Configure runs,
2268 the value is reset to a plain "ln" and is not useful.
2271 This variable holds the name of the command to make
2272 symbolic links (if they are supported). It can be used
2273 in the Makefile. It is either 'ln -s' or 'ln'
2275 locincpth (ccflags.U):
2276 This variable contains a list of additional directories to be
2277 searched by the compiler. The appropriate '-I' directives will
2278 be added to ccflags. This is intended to simplify setting
2279 local directories from the Configure command line.
2280 It's not much, but it parallels the loclibpth stuff in libpth.U.
2282 loclibpth (libpth.U):
2283 This variable holds the paths (space-separated) used to find local
2284 libraries. It is prepended to libpth, and is intended to be easily
2285 set from the command line.
2287 longdblsize (d_longdbl.U):
2288 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2289 indicates to the C program how many bytes there are in a long double,
2290 if this system supports long doubles.
2292 longlongsize (d_longlong.U):
2293 This variable contains the value of the LONGLONGSIZE symbol, which
2294 indicates to the C program how many bytes there are in a long long,
2295 if this system supports long long.
2297 longsize (intsize.U):
2298 This variable contains the value of the LONGSIZE symbol, which
2299 indicates to the C program how many bytes there are in a long.
2302 This variable is defined but not used by Configure.
2303 The value is a plain '' and is not useful.
2306 This variable is defined but not used by Configure.
2307 The value is a plain '' and is not useful.
2310 This variable is used internally by Configure to determine the
2311 full pathname (if any) of the ls program. After Configure runs,
2312 the value is reset to a plain "ls" and is not useful.
2314 lseeksize (lseektype.U):
2315 This variable defines lseektype to be something like off_t, long,
2316 or whatever type is used to declare lseek offset's type in the
2317 kernel (which also appears to be lseek's return type).
2319 lseektype (lseektype.U):
2320 This variable defines lseektype to be something like off_t, long,
2321 or whatever type is used to declare lseek offset's type in the
2322 kernel (which also appears to be lseek's return type).
2325 This variable is defined but not used by Configure.
2326 The value is a plain '' and is not useful.
2329 This variable is defined but not used by Configure.
2330 The value is a plain '' and is not useful.
2333 This variable is used internally by Configure to determine the
2334 full pathname (if any) of the make program. After Configure runs,
2335 the value is reset to a plain "make" and is not useful.
2337 make_set_make (make.U):
2338 Some versions of 'make' set the variable MAKE. Others do not.
2339 This variable contains the string to be included in Makefile.SH
2340 so that MAKE is set if needed, and not if not needed.
2341 Possible values are:
2342 make_set_make='#' # If your make program handles this for you,
2343 make_set_make="MAKE=$make" # if it doesn't.
2344 I used a comment character so that we can distinguish a
2345 'set' value (from a previous config.sh or Configure '-D' option)
2346 from an uncomputed value.
2348 mallocobj (mallocsrc.U):
2349 This variable contains the name of the malloc.o that this package
2350 generates, if that malloc.o is preferred over the system malloc.
2351 Otherwise the value is null. This variable is intended for generating
2352 Makefiles. See mallocsrc.
2354 mallocsrc (mallocsrc.U):
2355 This variable contains the name of the malloc.c that comes with
2356 the package, if that malloc.c is preferred over the system malloc.
2357 Otherwise the value is null. This variable is intended for generating
2360 malloctype (mallocsrc.U):
2361 This variable contains the kind of ptr returned by malloc and realloc.
2363 man1dir (man1dir.U):
2364 This variable contains the name of the directory in which manual
2365 source pages are to be put. It is the responsibility of the
2366 Makefile.SH to get the value of this into the proper command.
2367 You must be prepared to do the ~name expansion yourself.
2369 man1direxp (man1dir.U):
2370 This variable is the same as the man1dir variable, but is filename
2371 expanded at configuration time, for convenient use in makefiles.
2373 man1ext (man1dir.U):
2374 This variable contains the extension that the manual page should
2375 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2378 man3dir (man3dir.U):
2379 This variable contains the name of the directory in which manual
2380 source pages are to be put. It is the responsibility of the
2381 Makefile.SH to get the value of this into the proper command.
2382 You must be prepared to do the ~name expansion yourself.
2384 man3direxp (man3dir.U):
2385 This variable is the same as the man3dir variable, but is filename
2386 expanded at configuration time, for convenient use in makefiles.
2388 man3ext (man3dir.U):
2389 This variable contains the extension that the manual page should
2390 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2394 This variable is used internally by Configure to determine the
2395 full pathname (if any) of the Mcc program. After Configure runs,
2396 the value is reset to a plain "Mcc" and is not useful.
2399 This variable contains a flag which will tell the C compiler and loader
2400 to produce a program running with a medium memory model. If the
2401 medium model is not supported, contains the flag to produce large
2402 model programs. It is up to the Makefile to use this.
2404 mips_type (usrinc.U):
2405 This variable holds the environment type for the mips system.
2406 Possible values are "BSD 4.3" and "System V".
2409 This variable is used internally by Configure to determine the
2410 full pathname (if any) of the mkdir program. After Configure runs,
2411 the value is reset to a plain "mkdir" and is not useful.
2413 mmaptype (d_mmap.U):
2414 This symbol contains the type of pointer returned by mmap()
2415 (and simultaneously the type of the first argument).
2416 It can be 'void *' or 'caddr_t'.
2419 This variable contains the list of memory models supported by this
2420 system. Possible component values are none, split, unsplit, small,
2421 medium, large, and huge. The component values are space separated.
2423 modetype (modetype.U):
2424 This variable defines modetype to be something like mode_t,
2425 int, unsigned short, or whatever type is used to declare file
2426 modes for system calls.
2429 This variable is used internally by Configure to determine the
2430 full pathname (if any) of the more program. After Configure runs,
2431 the value is reset to a plain "more" and is not useful.
2433 multiarch (multiarch.U):
2434 This variable conditionally defines the MULTIARCH symbol
2435 which signifies the presence of multiplatform files.
2436 This is normally set by hints files.
2439 This variable is defined but not used by Configure.
2440 The value is a plain '' and is not useful.
2442 myarchname (archname.U):
2443 This variable holds the architecture name computed by Configure in
2444 a previous run. It is not intended to be perused by any user and
2445 should never be set in a hint file.
2447 mydomain (myhostname.U):
2448 This variable contains the eventual value of the MYDOMAIN symbol,
2449 which is the domain of the host the program is going to run on.
2450 The domain must be appended to myhostname to form a complete host name.
2451 The dot comes with mydomain, and need not be supplied by the program.
2453 myhostname (myhostname.U):
2454 This variable contains the eventual value of the MYHOSTNAME symbol,
2455 which is the name of the host the program is going to run on.
2456 The domain is not kept with hostname, but must be gotten from mydomain.
2457 The dot comes with mydomain, and need not be supplied by the program.
2459 myuname (Oldconfig.U):
2460 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2461 pseudo variables assignments in the output are stripped, thank you. The
2462 whole thing is then lower-cased.
2465 This variable contains the '-n' flag if that is what causes the echo
2466 command to suppress newline. Otherwise it is null. Correct usage is
2467 $echo $n "prompt for a question: $c".
2469 netdb_hlen_type (netdbtype.U):
2470 This variable holds the type used for the 2nd argument to
2471 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2472 This is only useful if you have gethostbyaddr(), naturally.
2474 netdb_host_type (netdbtype.U):
2475 This variable holds the type used for the 1st argument to
2476 gethostbyaddr(). Usually, this is char * or void *, possibly
2477 with or without a const prefix.
2478 This is only useful if you have gethostbyaddr(), naturally.
2480 netdb_name_type (netdbtype.U):
2481 This variable holds the type used for the argument to
2482 gethostbyname(). Usually, this is char * or const char *.
2483 This is only useful if you have gethostbyname(), naturally.
2485 netdb_net_type (netdbtype.U):
2486 This variable holds the type used for the 1st argument to
2487 getnetbyaddr(). Usually, this is int or long.
2488 This is only useful if you have getnetbyaddr(), naturally.
2491 This variable is used internally by Configure to determine the
2492 full pathname (if any) of the nm program. After Configure runs,
2493 the value is reset to a plain "nm" and is not useful.
2496 This variable holds the options that may be necessary for nm.
2498 nm_so_opt (usenm.U):
2499 This variable holds the options that may be necessary for nm
2500 to work on a shared library but that can not be used on an
2501 archive library. Currently, this is only used by Linux, where
2502 nm --dynamic is *required* to get symbols from an ELF library which
2503 has been stripped, but nm --dynamic is *fatal* on an archive library.
2504 Maybe Linux should just always set usenm=false.
2506 nonxs_ext (Extensions.U):
2507 This variable holds a list of all non-xs extensions included
2508 in the package. All of them will be built.
2511 This variable is used internally by Configure to determine the
2512 full pathname (if any) of the nroff program. After Configure runs,
2513 the value is reset to a plain "nroff" and is not useful.
2515 o_nonblock (nblock_io.U):
2516 This variable bears the symbol value to be used during open() or fcntl()
2517 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2518 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2519 but that is only supported by some devices.
2522 This is an old synonym for _o.
2524 old_pthread_create_joinable (d_pthrattrj.U):
2525 This variable defines the constant to use for creating joinable
2526 (aka undetached) pthreads. Unused if pthread.h defines
2527 PTHREAD_CREATE_JOINABLE. If used, possible values are
2528 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2530 optimize (ccflags.U):
2531 This variable contains any optimizer/debugger flag that should be used.
2532 It is up to the Makefile to use it.
2534 orderlib (orderlib.U):
2535 This variable is "true" if the components of libraries must be ordered
2536 (with `lorder $* | tsort`) before placing them in an archive. Set to
2537 "false" if ranlib or ar can generate random libraries.
2539 osname (Oldconfig.U):
2540 This variable contains the operating system name (e.g. sunos,
2541 solaris, hpux, etc.). It can be useful later on for setting
2542 defaults. Any spaces are replaced with underscores. It is set
2543 to a null string if we can't figure it out.
2545 osvers (Oldconfig.U):
2546 This variable contains the operating system version (e.g.
2547 4.1.3, 5.2, etc.). It is primarily used for helping select
2548 an appropriate hints file, but might be useful elsewhere for
2549 setting defaults. It is set to '' if we can't figure it out.
2550 We try to be flexible about how much of the version number
2551 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2552 same for this package, hints files might just be os_4.0 or
2553 os_4.1, etc., not keeping separate files for each little release.
2555 package (package.U):
2556 This variable contains the name of the package being constructed.
2557 It is primarily intended for the use of later Configure units.
2560 This variable contains the name of the preferred pager on the system.
2561 Usual values are (the full pathnames of) more, less, pg, or cat.
2564 This variable contains a command that produces the text of the
2565 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2566 "ypcat passwd" when NIS is used.
2568 patchlevel (patchlevel.U):
2569 The patchlevel level of this package.
2570 The value of patchlevel comes from the patchlevel.h file.
2573 This is an old synonym for p_ in Head.U, the character
2574 used to separate elements in the command shell search PATH.
2577 This variable is defined but not used by Configure.
2578 The value is a plain '' and is not useful.
2580 PERL_APIVERSION (Oldsyms.U):
2581 This value is manually set in patchlevel.h and is used
2582 to set the Configure apiversion variable.
2584 PERL_REVISION (Oldsyms.U):
2585 In a Perl version number such as 5.6.2, this is the 5.
2586 This value is manually set in patchlevel.h
2588 PERL_SUBVERSION (Oldsyms.U):
2589 In a Perl version number such as 5.6.2, this is the 2.
2590 Values greater than 50 represent potentially unstable
2591 development subversions.
2592 This value is manually set in patchlevel.h
2594 PERL_VERSION (Oldsyms.U):
2595 In a Perl version number such as 5.6.2, this is the 6.
2596 This value is manually set in patchlevel.h
2598 perladmin (perladmin.U):
2599 Electronic mail address of the perl5 administrator.
2601 perlpath (perlpath.U):
2602 This variable contains the eventual value of the PERLPATH symbol,
2603 which contains the name of the perl interpreter to be used in
2604 shell scripts and in the "eval 'exec'" idiom.
2607 This variable is used internally by Configure to determine the
2608 full pathname (if any) of the pg program. After Configure runs,
2609 the value is reset to a plain "pg" and is not useful.
2611 phostname (myhostname.U):
2612 This variable contains the eventual value of the PHOSTNAME symbol,
2613 which is a command that can be fed to popen() to get the host name.
2614 The program should probably not presume that the domain is or isn't
2617 pidtype (pidtype.U):
2618 This variable defines PIDTYPE to be something like pid_t, int,
2619 ushort, or whatever type is used to declare process ids in the kernel.
2622 Holds the private path used by Configure to find out the libraries.
2623 Its value is prepend to libpth. This variable takes care of special
2624 machines, like the mips. Usually, it should be empty.
2626 pm_apiversion (xs_apiversion.U):
2627 This variable contains the version of the oldest perl
2628 compatible with the present perl. (That is, pure perl modules
2629 written for $pm_apiversion will still work for the current
2630 version). perl.c:incpush() and lib/lib.pm will automatically
2631 search in $sitelib for older directories across major versions
2632 back to pm_apiversion. This is only useful if you have a perl
2633 library directory tree structured like the default one. The
2634 versioned site_perl library was introduced in 5.005, so that's
2635 the default setting for this variable. It's hard to imagine
2636 it changing before Perl6. It is included here for symmetry
2637 with xs_apiveprsion -- the searching algorithms will
2638 (presumably) be similar.
2639 See the INSTALL file for how this works.
2642 This variable is defined but not used by Configure.
2643 The value is a plain '' and is not useful.
2646 This variable is defined but not used by Configure.
2647 The value is a plain '' and is not useful.
2650 This variable holds the name of the directory below which the
2651 user will install the package. Usually, this is /usr/local, and
2652 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2653 man pages in /usr/local/man, etc. It is only used to set defaults
2654 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2656 prefixexp (prefix.U):
2657 This variable holds the full absolute path of the directory below
2658 which the user will install the package. Derived from prefix.
2660 privlib (privlib.U):
2661 This variable contains the eventual value of the PRIVLIB symbol,
2662 which is the name of the private library for this package. It may
2663 have a ~ on the front. It is up to the makefile to eventually create
2664 this directory while performing installation (with ~ substitution).
2666 privlibexp (privlib.U):
2667 This variable is the ~name expanded version of privlib, so that you
2668 may use it directly in Makefiles or shell scripts.
2670 prototype (prototype.U):
2671 This variable holds the eventual value of CAN_PROTOTYPE, which
2672 indicates the C compiler can handle funciton prototypes.
2674 ptrsize (ptrsize.U):
2675 This variable contains the value of the PTRSIZE symbol, which
2676 indicates to the C program how many bytes there are in a pointer.
2678 randbits (randfunc.U):
2679 Indicates how many bits are produced by the function used to
2680 generate normalized random numbers.
2682 randfunc (randfunc.U):
2683 Indicates the name of the random number function to use.
2684 Values include drand48, random, and rand. In C programs,
2685 the 'Drand01' macro is defined to generate uniformly distributed
2686 random numbers over the range [0., 1.[ (see drand01 and nrand).
2688 randseedtype (randfunc.U):
2689 Indicates the type of the argument of the seedfunc.
2691 ranlib (orderlib.U):
2692 This variable is set to the pathname of the ranlib program, if it is
2693 needed to generate random libraries. Set to ":" if ar can generate
2694 random libraries or if random libraries are not supported
2696 rd_nodata (nblock_io.U):
2697 This variable holds the return code from read() when no data is
2698 present. It should be -1, but some systems return 0 when O_NDELAY is
2699 used, which is a shame because you cannot make the difference between
2700 no data and an EOF.. Sigh!
2703 This variable is used internally by Configure to determine the
2704 full pathname (if any) of the rm program. After Configure runs,
2705 the value is reset to a plain "rm" and is not useful.
2708 This variable is defined but not used by Configure.
2709 The value is a plain '' and is not useful.
2712 This variable contains 'true' or 'false' depending whether the
2713 nm extraction should be performed or not, according to the value
2714 of usenm and the flags on the Configure command line.
2716 sched_yield (d_pthread_y.U):
2717 This variable defines the way to yield the execution
2718 of the current thread.
2720 scriptdir (scriptdir.U):
2721 This variable holds the name of the directory in which the user wants
2722 to put publicly scripts for the package in question. It is either
2723 the same directory as for binaries, or a special one that can be
2724 mounted across different architectures, like /usr/share. Programs
2725 must be prepared to deal with ~name expansion.
2727 scriptdirexp (scriptdir.U):
2728 This variable is the same as scriptdir, but is filename expanded
2729 at configuration time, for programs not wanting to bother with it.
2732 This variable is used internally by Configure to determine the
2733 full pathname (if any) of the sed program. After Configure runs,
2734 the value is reset to a plain "sed" and is not useful.
2736 seedfunc (randfunc.U):
2737 Indicates the random number generating seed function.
2738 Values include srand48, srandom, and srand.
2740 selectminbits (selectminbits.U):
2741 This variable holds the minimum number of bits operated by select.
2742 That is, if you do select(n, ...), how many bits at least will be
2743 cleared in the masks if some activity is detected. Usually this
2744 is either n or 32*ceil(n/32), especially many little-endians do
2745 the latter. This is only useful if you have select(), naturally.
2747 selecttype (selecttype.U):
2748 This variable holds the type used for the 2nd, 3rd, and 4th
2749 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2750 is defined, and 'int *' otherwise. This is only useful if you
2751 have select(), naturally.
2754 This variable is defined but not used by Configure.
2755 The value is a plain '' and is not useful.
2758 This variable contains the full pathname of the shell used
2759 on this system to execute Bourne shell scripts. Usually, this will be
2760 /bin/sh, though it's possible that some systems will have /bin/ksh,
2761 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2763 This unit comes before Options.U, so you can't set sh with a '-D'
2764 option, though you can override this (and startsh)
2765 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2768 This variable is defined but not used by Configure.
2769 The value is a plain '' and is not useful.
2771 sharpbang (spitshell.U):
2772 This variable contains the string #! if this system supports that
2775 shmattype (d_shmat.U):
2776 This symbol contains the type of pointer returned by shmat().
2777 It can be 'void *' or 'char *'.
2779 shortsize (intsize.U):
2780 This variable contains the value of the SHORTSIZE symbol which
2781 indicates to the C program how many bytes there are in a short.
2783 shrpenv (libperl.U):
2784 If the user builds a shared libperl.so, then we need to tell the
2785 'perl' executable where it will be able to find the installed libperl.so.
2786 One way to do this on some systems is to set the environment variable
2787 LD_RUN_PATH to the directory that will be the final location of the
2788 shared libperl.so. The makefile can use this with something like
2789 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2791 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2794 See the main perl Makefile.SH for actual working usage.
2795 Alternatively, we might be able to use a command line option such
2796 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2797 $archlibexp/CORE (Linux).
2799 shsharp (spitshell.U):
2800 This variable tells further Configure units whether your sh can
2803 sig_count (sig_name.U):
2804 This variable holds a number larger than the largest valid
2805 signal number. This is usually the same as the NSIG macro.
2807 sig_name (sig_name.U):
2808 This variable holds the signal names, space separated. The leading
2809 SIG in signal name is removed. A ZERO is prepended to the
2810 list. This is currently not used.
2812 sig_name_init (sig_name.U):
2813 This variable holds the signal names, enclosed in double quotes and
2814 separated by commas, suitable for use in the SIG_NAME definition
2815 below. A "ZERO" is prepended to the list, and the list is
2816 terminated with a plain 0. The leading SIG in signal names
2817 is removed. See sig_num.
2819 sig_num (sig_name.U):
2820 This variable holds the signal numbers, space separated. A ZERO is
2821 prepended to the list (corresponding to the fake SIGZERO), and
2822 the list is terminated with a 0. Those numbers correspond to
2823 the value of the signal listed in the same place within the
2826 sig_num_init (sig_name.U):
2827 This variable holds the signal numbers, enclosed in double quotes and
2828 separated by commas, suitable for use in the SIG_NUM definition
2829 below. A "ZERO" is prepended to the list, and the list is
2830 terminated with a plain 0.
2832 signal_t (d_voidsig.U):
2833 This variable holds the type of the signal handler (void or int).
2835 sitearch (sitearch.U):
2836 This variable contains the eventual value of the SITEARCH symbol,
2837 which is the name of the private library for this package. It may
2838 have a ~ on the front. It is up to the makefile to eventually create
2839 this directory while performing installation (with ~ substitution).
2841 sitearchexp (sitearch.U):
2842 This variable is the ~name expanded version of sitearch, so that you
2843 may use it directly in Makefiles or shell scripts.
2845 sitebin (sitebin.U):
2846 This variable holds the name of the directory in which the user wants
2847 to put add-on publicly executable files for the package in question. It
2848 is most often a local directory such as /usr/local/bin. Programs using
2849 this variable must be prepared to deal with ~name substitution.
2851 sitebinexp (sitebin.U):
2852 This is the same as the sitebin variable, but is filename expanded at
2853 configuration time, for use in your makefiles.
2855 sitelib (sitelib.U):
2856 This variable contains the eventual value of the SITELIB symbol,
2857 which is the name of the private library for this package. It may
2858 have a ~ on the front. It is up to the makefile to eventually create
2859 this directory while performing installation (with ~ substitution).
2861 sitelibexp (sitelib.U):
2862 This variable is the ~name expanded version of sitelib, so that you
2863 may use it directly in Makefiles or shell scripts.
2865 siteprefix (siteprefix.U):
2866 This variable holds the full absolute path of the directory below
2867 which the user will install add-on packages.
2869 siteprefixexp (siteprefix.U):
2870 This variable holds the full absolute path of the directory below
2871 which the user will install add-on packages. Derived from siteprefix.
2873 sizetype (sizetype.U):
2874 This variable defines sizetype to be something like size_t,
2875 unsigned long, or whatever type is used to declare length
2876 parameters for string functions.
2879 This variable is defined but not used by Configure.
2880 The value is a plain '' and is not useful.
2883 This variable is defined but not used by Configure.
2884 The value is a plain '' and is not useful.
2887 This variable contains a flag which will tell the C compiler and loader
2888 to produce a program running with a small memory model. It is up to
2889 the Makefile to use this.
2892 This variable holds the extension used to identify shared libraries
2893 (also known as shared objects) on the system. Usually set to 'so'.
2895 sockethdr (d_socket.U):
2896 This variable has any cpp '-I' flags needed for socket support.
2898 socketlib (d_socket.U):
2899 This variable has the names of any libraries needed for socket support.
2902 This variable is used internally by Configure to determine the
2903 full pathname (if any) of the sort program. After Configure runs,
2904 the value is reset to a plain "sort" and is not useful.
2906 spackage (package.U):
2907 This variable contains the name of the package being constructed,
2908 with the first letter uppercased, i.e. suitable for starting
2911 spitshell (spitshell.U):
2912 This variable contains the command necessary to spit out a runnable
2913 shell on this system. It is either cat or a grep '-v' for # comments.
2916 This variable contains a flag which will tell the C compiler and loader
2917 to produce a program that will run in separate I and D space, for those
2918 machines that support separation of instruction and data space. It is
2919 up to the Makefile to use this.
2921 sPRId64 (quadfio.U):
2922 This variable, if defined, contains the string used by stdio to
2923 format 64-bit decimal numbers (format 'd') for output.
2925 sPRIeldbl (longdblfio.U):
2926 This variable, if defined, contains the string used by stdio to
2927 format long doubles (format 'e') for output.
2929 sPRIEldbl (longdblfio.U):
2930 This variable, if defined, contains the string used by stdio to
2931 format long doubles (format 'E') for output.
2933 sPRIfldbl (longdblfio.U):
2934 This variable, if defined, contains the string used by stdio to
2935 format long doubles (format 'f') for output.
2937 sPRIFldbl (longdblfio.U):
2938 This variable, if defined, contains the string used by stdio to
2939 format long doubles (format 'F') for output.
2941 sPRIgldbl (longdblfio.U):
2942 This variable, if defined, contains the string used by stdio to
2943 format long doubles (format 'g') for output.
2945 sPRIGldbl (longdblfio.U):
2946 This variable, if defined, contains the string used by stdio to
2947 format long doubles (format 'G') for output.
2949 sPRIi64 (quadfio.U):
2950 This variable, if defined, contains the string used by stdio to
2951 format 64-bit decimal numbers (format 'i') for output.
2953 sPRIo64 (quadfio.U):
2954 This variable, if defined, contains the string used by stdio to
2955 format 64-bit octal numbers (format 'o') for output.
2957 sPRIu64 (quadfio.U):
2958 This variable, if defined, contains the string used by stdio to
2959 format 64-bit unsigned decimal numbers (format 'u') for output.
2961 sPRIx64 (quadfio.U):
2962 This variable, if defined, contains the string used by stdio to
2963 format 64-bit hexadecimal numbers (format 'x') for output.
2965 sPRIX64 (quadfio.U):
2966 This variable, if defined, contains the string used by stdio to
2967 format 64-bit hExADECimAl numbers (format 'X') for output.
2970 This variable holds the path to the package source. It is up to
2971 the Makefile to use this variable and set VPATH accordingly to
2972 find the sources remotely.
2974 ssizetype (ssizetype.U):
2975 This variable defines ssizetype to be something like ssize_t,
2976 long or int. It is used by functions that return a count
2977 of bytes or an error condition. It must be a signed type.
2978 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2980 startperl (startperl.U):
2981 This variable contains the string to put on the front of a perl
2982 script to make sure (hopefully) that it runs with perl and not some
2983 shell. Of course, that leading line must be followed by the classical
2985 eval 'exec perl -S $0 ${1+"$@"}'
2986 if $running_under_some_shell;
2987 to guarantee perl startup should the shell execute the script. Note
2988 that this magic incatation is not understood by csh.
2990 startsh (startsh.U):
2991 This variable contains the string to put on the front of a shell
2992 script to make sure (hopefully) that it runs with sh and not some
2995 static_ext (Extensions.U):
2996 This variable holds a list of XS extension files we want to
2997 link statically into the package. It is used by Makefile.
2999 stdchar (stdchar.U):
3000 This variable conditionally defines STDCHAR to be the type of char
3001 used in stdio.h. It has the values "unsigned char" or "char".
3003 stdio_base (d_stdstdio.U):
3004 This variable defines how, given a FILE pointer, fp, to access the
3005 _base field (or equivalent) of stdio.h's FILE structure. This will
3006 be used to define the macro FILE_base(fp).
3008 stdio_bufsiz (d_stdstdio.U):
3009 This variable defines how, given a FILE pointer, fp, to determine
3010 the number of bytes store in the I/O buffer pointer to by the
3011 _base field (or equivalent) of stdio.h's FILE structure. This will
3012 be used to define the macro FILE_bufsiz(fp).
3014 stdio_cnt (d_stdstdio.U):
3015 This variable defines how, given a FILE pointer, fp, to access the
3016 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3017 be used to define the macro FILE_cnt(fp).
3019 stdio_filbuf (d_stdstdio.U):
3020 This variable defines how, given a FILE pointer, fp, to tell
3021 stdio to refill it's internal buffers (?). This will
3022 be used to define the macro FILE_filbuf(fp).
3024 stdio_ptr (d_stdstdio.U):
3025 This variable defines how, given a FILE pointer, fp, to access the
3026 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3027 be used to define the macro FILE_ptr(fp).
3029 stdio_stream_array (stdio_streams.U):
3030 This variable tells the name of the array holding the stdio streams.
3031 Usual values include _iob, __iob, and __sF.
3033 strings (i_string.U):
3034 This variable holds the full path of the string header that will be
3035 used. Typically /usr/include/string.h or /usr/include/strings.h.
3038 This variable is defined but not used by Configure.
3039 The value is a plain '' and is not useful.
3041 subversion (patchlevel.U):
3042 The subversion level of this package.
3043 The value of subversion comes from the patchlevel.h file.
3044 This is unique to perl.
3047 This variable holds the place where the manual is located on this
3048 system. It is not the place where the user wants to put his manual
3049 pages. Rather it is the place where Configure may look to find manual
3050 for unix commands (section 1 of the manual usually). See mansrc.
3053 This variable is defined but not used by Configure.
3054 The value is a plain '' and is not useful.
3057 This variable is defined but not used by Configure.
3058 The value is a plain '' and is not useful.
3061 This variable is defined but not used by Configure.
3062 The value is a plain '' and is not useful.
3065 This variable is defined but not used by Configure.
3066 The value is a plain '' and is not useful.
3069 This variable is used internally by Configure to determine the
3070 full pathname (if any) of the test program. After Configure runs,
3071 the value is reset to a plain "test" and is not useful.
3073 timeincl (i_time.U):
3074 This variable holds the full path of the included time header(s).
3076 timetype (d_time.U):
3077 This variable holds the type returned by time(). It can be long,
3078 or time_t on BSD sites (in which case <sys/types.h> should be
3079 included). Anyway, the type Time_t should be used.
3082 This variable is used internally by Configure to determine the
3083 full pathname (if any) of the touch program. After Configure runs,
3084 the value is reset to a plain "touch" and is not useful.
3087 This variable is used internally by Configure to determine the
3088 full pathname (if any) of the tr program. After Configure runs,
3089 the value is reset to a plain "tr" and is not useful.
3092 This variable contains the value to be passed to the tr(1)
3093 command to transliterate a newline. Typical values are
3094 '\012' and '\n'. This is needed for EBCDIC systems where
3095 newline is not necessarily '\012'.
3098 This variable is defined but not used by Configure.
3099 The value is a plain '' and is not useful.
3101 uidsign (uidsign.U):
3102 This variable contains the signedness of a uidtype.
3103 1 for unsigned, -1 for signed.
3105 uidtype (uidtype.U):
3106 This variable defines Uid_t to be something like uid_t, int,
3107 ushort, or whatever type is used to declare user ids in the kernel.
3110 This variable is used internally by Configure to determine the
3111 full pathname (if any) of the uname program. After Configure runs,
3112 the value is reset to a plain "uname" and is not useful.
3115 This variable is used internally by Configure to determine the
3116 full pathname (if any) of the uniq program. After Configure runs,
3117 the value is reset to a plain "uniq" and is not useful.
3119 use64bits (use64bits.U):
3120 This variable conditionally defines the USE_64_BITS symbol,
3121 and indicates that explicit 64-bit interfaces should be used
3125 This variable indicates if the the system supports dynamic
3126 loading of some sort. See also dlsrc and dlobj.
3128 uselargefiles (uselfs.U):
3129 This variable conditionally defines the USE_LARGE_FILES symbol,
3130 and indicates that large file interfaces should be used when
3131 available. The use64bits symbol will also be turned on if necessary.
3133 uselongdouble (uselongdbl.U):
3134 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3135 and indicates that long doubles should be used when available.
3137 usemorebits (usemorebits.U):
3138 This variable conditionally defines the USE_MORE_BITS symbol,
3139 and indicates that explicit 64-bit interfaces and long doubles
3140 should be used when available.
3142 usemultiplicity (usemultiplicity.U):
3143 This variable conditionally defines the MULTIPLICITY symbol,
3144 and indicates that Perl should be built to use multiplicity.
3146 usemymalloc (mallocsrc.U):
3147 This variable contains y if the malloc that comes with this package
3148 is desired over the system's version of malloc. People often include
3149 special versions of malloc for effiency, but such versions are often
3150 less portable. See also mallocsrc and mallocobj.
3151 If this is 'y', then -lmalloc is removed from $libs.
3154 This variable contains 'true' or 'false' depending whether the
3155 nm extraction is wanted or not.
3157 useopcode (Extensions.U):
3158 This variable holds either 'true' or 'false' to indicate
3159 whether the Opcode extension should be used. The sole
3160 use for this currently is to allow an easy mechanism
3161 for users to skip the Opcode extension from the Configure
3164 useperlio (useperlio.U):
3165 This variable conditionally defines the USE_PERLIO symbol,
3166 and indicates that the PerlIO abstraction should be
3169 useposix (Extensions.U):
3170 This variable holds either 'true' or 'false' to indicate
3171 whether the POSIX extension should be used. The sole
3172 use for this currently is to allow an easy mechanism
3173 for hints files to indicate that POSIX will not compile
3174 on a particular system.
3177 This variable is set to true when the user agrees to use sfio.
3178 It is set to false when sfio is not available or when the user
3179 explicitely requests not to use sfio. It is here primarily so
3180 that command-line settings can override the auto-detection of
3181 d_sfio without running into a "WHOA THERE".
3183 useshrplib (libperl.U):
3184 This variable is set to 'yes' if the user wishes
3185 to build a shared libperl, and 'no' otherwise.
3187 usesocks (usesocks.U):
3188 This variable conditionally defines the USE_SOCKS symbol,
3189 and indicates that Perl should be built to use SOCKS.
3191 usethreads (usethreads.U):
3192 This variable conditionally defines the USE_THREADS symbol,
3193 and indicates that Perl should be built to use threads.
3195 usevendorprefix (vendorprefix.U):
3196 This variable tells whether the vendorprefix
3197 and consequently other vendor* paths are in use.
3199 usevfork (d_vfork.U):
3200 This variable is set to true when the user accepts to use vfork.
3201 It is set to false when no vfork is available or when the user
3202 explicitely requests not to use vfork.
3205 This variable holds the path of the include files, which is
3206 usually /usr/include. It is mainly used by other Configure units.
3209 This variable is defined but not used by Configure.
3210 The value is a plain '' and is not useful.
3212 vendorbin (vendorbin.U):
3213 This variable contains the eventual value of the VENDORBIN symbol,
3214 which is the name of the private directory for exuctables for this package.
3215 It may have a ~ on the front. It is up to the makefile to eventually create
3216 this directory while performing installation (with ~ substitution).
3217 Vendors who distribute perl binaries may place their own
3218 extensions and modules in this directory.
3220 vendorbinexp (vendorbin.U):
3221 This variable is the ~name expanded version of vendorbin, so that you
3222 may use it directly in Makefiles or shell scripts.
3224 vendorlib (vendorlib.U):
3225 This variable contains the eventual value of the VENDORLIB symbol,
3226 which is the name of the private library for this package. It may
3227 have a ~ on the front. It is up to the makefile to eventually create
3228 this directory while performing installation (with ~ substitution).
3229 Vendors who distribute perl binaries may place their own
3230 extensions and modules in this directory.
3232 vendorlibexp (vendorlib.U):
3233 This variable is the ~name expanded version of vendorlib, so that you
3234 may use it directly in Makefiles or shell scripts.
3236 vendorprefix (vendorprefix.U):
3237 This variable holds the full absolute path of the directory below
3238 which the vendor will install add-on packages.
3240 vendorprefixexp (vendorprefix.U):
3241 This variable holds the full absolute path of the directory below
3242 which the vendor will install add-on packages. Derived from vendorprefix.
3244 version (patchlevel.U):
3245 The full version number of this package. This combines
3246 baserev, patchlevel, and subversion to get the full
3247 version number, including any possible subversions. Care
3248 is taken to use the C locale in order to get something
3249 like 5.004 instead of 5,004. This is unique to perl.
3252 This variable is defined but not used by Configure.
3253 The value is a plain '' and is not useful.
3255 voidflags (voidflags.U):
3256 This variable contains the eventual value of the VOIDFLAGS symbol,
3257 which indicates how much support of the void type is given by this
3258 compiler. See VOIDFLAGS for more info.
3261 This variable holds extra path (space-separated) used to find
3262 libraries on this platform, for example CPU-specific libraries
3263 (on multi-CPU platforms) may be listed here.
3265 xs_apiversion (xs_apiversion.U):
3266 This variable contains the version of the oldest perl binary
3267 compatible with the present perl. perl.c:incpush() and
3268 lib/lib.pm will automatically search in $sitearch for older
3269 directories across major versions back to xs_apiversion.
3270 This is only useful if you have a perl library directory tree
3271 structured like the default one.
3272 See INSTALL for how this works.
3273 The versioned site_perl directory was introduced in 5.005,
3274 so that is the lowest possible value.
3275 Since this can depend on compile time options (such as
3276 bincompat) it is set by Configure. Other non-default sources
3277 of potential incompatibility, such as multiplicity, threads,
3278 debugging, 64bits, sfio, etc., are not checked for currently,
3279 though in principle we could go snooping around in old
3283 This variable is defined but not used by Configure.
3284 The value is a plain '' and is not useful.
3287 This variable is used internally by Configure to determine the
3288 full pathname (if any) of the zip program. After Configure runs,
3289 the value is reset to a plain "zip" and is not useful.