1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double. Usual values are 2, 4 and 8.
31 ansi2knr (ansi2knr.U):
32 This variable is set if the user needs to run ansi2knr.
33 Currently, this is not supported, so we just abort.
35 aphostname (d_gethname.U):
36 This variable contains the command which can be used to compute the
37 host name. The command is fully qualified by its absolute path, to make
38 it safe when used by a process with super-user privileges.
40 apiversion (patchlevel.U):
41 MakeMaker will install add-on modules in a directory with the
42 PERL_APIVERSION version number. The value is set manually in
43 patchlevel.h. Normally, for maintenance releases, this is
44 just something like 5.005 or 5.6 or 5.7. That is, it does not
45 include the subversion number and does not change across
46 maintenance releases. This is so that add-on extensions can
47 be shared across maintenance versions. It is unclear how this
48 ought to work for developer versions. If a release breaks
49 binary compatibility, this number should be increased.
52 This variable is used internally by Configure to determine the
53 full pathname (if any) of the ar program. After Configure runs,
54 the value is reset to a plain "ar" and is not useful.
57 This variable holds the name of the directory in which the user wants
58 to put architecture-dependent public library files for $package.
59 It is most often a local directory such as /usr/local/lib.
60 Programs using this variable must be prepared to deal
61 with filename expansion.
63 archlibexp (archlib.U):
64 This variable is the same as the archlib variable, but is
65 filename expanded at configuration time, for convenient use.
67 archname64 (use64bits.U):
68 This variable is used for the 64-bitness part of $archname.
70 archname (archname.U):
71 This variable is a short name to characterize the current
72 architecture. It is used mainly to construct the default archlib.
75 This variable defines any additional objects that must be linked
76 in with the program on this architecture. On unix, it is usually
77 empty. It is typically used to include emulations of unix calls
78 or other facilities. For perl on OS/2, for example, this would
82 This variable is used internally by Configure to determine the
83 full pathname (if any) of the awk program. After Configure runs,
84 the value is reset to a plain "awk" and is not useful.
87 The base revision level of this package, from the .package file.
90 This variable is defined but not used by Configure.
91 The value is a plain '' and is not useful.
94 This variable holds the name of the directory in which the user wants
95 to put publicly executable images for the package in question. It
96 is most often a local directory such as /usr/local/bin. Programs using
97 this variable must be prepared to deal with ~name substitution.
99 bincompat5005 (bincompat5005.U):
100 This variable contains y if Perl 5.006 should be binary-compatible
104 This is the same as the bin variable, but is filename expanded at
105 configuration time, for use in your makefiles.
108 This variable is defined but not used by Configure.
109 The value is a plain '' and is not useful.
112 This variable is used internally by Configure to determine the
113 full pathname (if any) of the byacc program. After Configure runs,
114 the value is reset to a plain "byacc" and is not useful.
116 byteorder (byteorder.U):
117 This variable holds the byte order. In the following, larger digits
118 indicate more significance. The variable byteorder is either 4321
119 on a big-endian machine, or 1234 on a little-endian, or 87654321
120 on a Cray ... or 3412 with weird order !
123 This variable contains the \c string if that is what causes the echo
124 command to suppress newline. Otherwise it is null. Correct usage is
125 $echo $n "prompt for a question: $c".
127 castflags (d_castneg.U):
128 This variable contains a flag that precise difficulties the
129 compiler has casting odd floating values to unsigned long:
131 1 = couldn't cast < 0
132 2 = couldn't cast >= 0x80000000
133 4 = couldn't cast in argument expression list
136 This variable is used internally by Configure to determine the
137 full pathname (if any) of the cat program. After Configure runs,
138 the value is reset to a plain "cat" and is not useful.
141 This variable holds the name of a command to execute a C compiler which
142 can resolve multiple global references that happen to have the same
143 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
145 cccdlflags (dlsrc.U):
146 This variable contains any special flags that might need to be
147 passed with 'cc -c' to compile modules to be used to create a shared
148 library that will be used for dynamic loading. For hpux, this
149 should be +z. It is up to the makefile to use it.
152 This variable contains any special flags that might need to be
153 passed to cc to link with a shared library for dynamic loading.
154 It is up to the makefile to use it. For sunos 4.1, it should
158 This variable contains any additional C compiler flags desired by
159 the user. It is up to the Makefile to use this.
161 ccsymbols (Cppsym.U):
162 The variable contains the symbols defined by the C compiler alone.
163 The symbols defined by cpp or by cc when it calls cpp are not in
164 this list, see cppsymbols and cppccsymbols.
165 The list is a space-separated list of symbol=value tokens.
168 Login name of the person who ran the Configure script and answered the
169 questions. This is used to tag both config.sh and config_h.SH.
171 cf_email (cf_email.U):
172 Electronic mail address of the person who ran Configure. This can be
173 used by units that require the user's e-mail, like MailList.U.
176 Holds the output of the "date" command when the configuration file was
177 produced. This is used to tag both config.sh and config_h.SH.
180 This variable is defined but not used by Configure.
181 The value is a plain '' and is not useful.
184 This variable is defined but not used by Configure.
185 The value is a plain '' and is not useful.
188 This variable is defined but not used by Configure.
189 The value is a plain '' and is not useful.
191 clocktype (d_times.U):
192 This variable holds the type returned by times(). It can be long,
193 or clock_t on BSD sites (in which case <sys/types.h> should be
197 This variable is used internally by Configure to determine the
198 full pathname (if any) of the comm program. After Configure runs,
199 the value is reset to a plain "comm" and is not useful.
202 This variable is defined but not used by Configure.
203 The value is a plain '' and is not useful.
205 CONFIGDOTSH (Oldsyms.U):
206 This is set to 'true' in config.sh so that a shell script
207 sourcing config.sh can tell if it has been sourced already.
209 contains (contains.U):
210 This variable holds the command to do a grep with a proper return
211 status. On most sane systems it is simply "grep". On insane systems
212 it is a grep followed by a cat followed by a test. This variable
213 is primarily for the use of other Configure units.
216 This variable is used internally by Configure to determine the
217 full pathname (if any) of the cp program. After Configure runs,
218 the value is reset to a plain "cp" and is not useful.
221 This variable is defined but not used by Configure.
222 The value is a plain '' and is not useful.
225 This variable is used internally by Configure to determine the
226 full pathname (if any) of the cpp program. After Configure runs,
227 the value is reset to a plain "cpp" and is not useful.
229 cpp_stuff (cpp_stuff.U):
230 This variable contains an identification of the catenation mechanism
231 used by the C preprocessor.
233 cppccsymbols (Cppsym.U):
234 The variable contains the symbols defined by the C compiler when
235 when it calls cpp. The symbols defined by the cc alone or cpp
236 alone are not in this list, see ccsymbols and cppsymbols.
237 The list is a space-separated list of symbol=value tokens.
239 cppflags (ccflags.U):
240 This variable holds the flags that will be passed to the C pre-
241 processor. It is up to the Makefile to use it.
243 cpplast (cppstdin.U):
244 This variable has the same functionality as cppminus, only it applies
245 to cpprun and not cppstdin.
247 cppminus (cppstdin.U):
248 This variable contains the second part of the string which will invoke
249 the C preprocessor on the standard input and produce to standard
250 output. This variable will have the value "-" if cppstdin needs
251 a minus to specify standard input, otherwise the value is "".
254 This variable contains the command which will invoke a C preprocessor
255 on standard input and put the output to stdout. It is guaranteed not
256 to be a wrapper and may be a null string if no preprocessor can be
257 made directly available. This preprocessor might be different from the
258 one used by the C compiler. Don't forget to append cpplast after the
259 preprocessor options.
261 cppstdin (cppstdin.U):
262 This variable contains the command which will invoke the C
263 preprocessor on standard input and put the output to stdout.
264 It is primarily used by other Configure units that ask about
265 preprocessor symbols.
267 cppsymbols (Cppsym.U):
268 The variable contains the symbols defined by the C preprocessor
269 alone. The symbols defined by cc or by cc when it calls cpp are
270 not in this list, see ccsymbols and cppccsymbols.
271 The list is a space-separated list of symbol=value tokens.
273 crosscompile (crosscompile.U):
274 This variable conditionally defines the CROSSCOMPILE symbol
275 which signifies that the build process is be a cross-compilation.
276 This is normally set by hints files or from Configure command line.
278 cryptlib (d_crypt.U):
279 This variable holds -lcrypt or the path to a libcrypt.a archive if
280 the crypt() function is not defined in the standard C library. It is
281 up to the Makefile to use this.
284 This variable is used internally by Configure to determine the
285 full pathname (if any) of the csh program. After Configure runs,
286 the value is reset to a plain "csh" and is not useful.
288 d_access (d_access.U):
289 This variable conditionally defines HAS_ACCESS if the access() system
290 call is available to check for access permissions using real IDs.
292 d_accessx (d_accessx.U):
293 This variable conditionally defines the HAS_ACCESSX symbol, which
294 indicates to the C program that the accessx() routine is available.
297 This variable conditionally defines the HAS_ALARM symbol, which
298 indicates to the C program that the alarm() routine is available.
300 d_archlib (archlib.U):
301 This variable conditionally defines ARCHLIB to hold the pathname
302 of architecture-dependent library files for $package. If
303 $archlib is the same as $privlib, then this is set to undef.
306 This variable conditionally defines the HAS_ATOLF symbol, which
307 indicates to the C program that the atolf() routine is available.
310 This variable conditionally defines the HAS_ATOLL symbol, which
311 indicates to the C program that the atoll() routine is available.
313 d_attribut (d_attribut.U):
314 This variable conditionally defines HASATTRIBUTE, which
315 indicates the C compiler can check for function attributes,
316 such as printf formats.
319 This variable conditionally defines the HAS_BCMP symbol if
320 the bcmp() routine is available to compare strings.
323 This variable conditionally defines the HAS_BCOPY symbol if
324 the bcopy() routine is available to copy strings.
326 d_bincompat5005 (bincompat5005.U):
327 This variable conditionally defines BINCOMPAT5005 so that embed.h
328 can take special action if Perl 5.006 should be binary-compatible
329 with Perl 5.005. This is impossible for builds that use features
330 like threads and multiplicity it is always $undef for those versions.
333 This symbol conditionally defines the symbol BSD when running on a
336 d_bsdgetpgrp (d_getpgrp.U):
337 This variable conditionally defines USE_BSD_GETPGRP if
338 getpgrp needs one arguments whereas USG one needs none.
340 d_bsdsetpgrp (d_setpgrp.U):
341 This variable conditionally defines USE_BSD_SETPGRP if
342 setpgrp needs two arguments whereas USG one needs none.
343 See also d_setpgid for a POSIX interface.
346 This variable conditionally defines the HAS_BZERO symbol if
347 the bzero() routine is available to set memory to 0.
349 d_casti32 (d_casti32.U):
350 This variable conditionally defines CASTI32, which indicates
351 whether the C compiler can cast large floats to 32-bit ints.
353 d_castneg (d_castneg.U):
354 This variable conditionally defines CASTNEG, which indicates
355 wether the C compiler can cast negative float to unsigned.
357 d_charvspr (d_vprintf.U):
358 This variable conditionally defines CHARVSPRINTF if this system
359 has vsprintf returning type (char*). The trend seems to be to
360 declare it as "int vsprintf()".
363 This variable conditionally defines the HAS_CHOWN symbol, which
364 indicates to the C program that the chown() routine is available.
366 d_chroot (d_chroot.U):
367 This variable conditionally defines the HAS_CHROOT symbol, which
368 indicates to the C program that the chroot() routine is available.
370 d_chsize (d_chsize.U):
371 This variable conditionally defines the CHSIZE symbol, which
372 indicates to the C program that the chsize() routine is available
373 to truncate files. You might need a -lx to get this routine.
375 d_closedir (d_closedir.U):
376 This variable conditionally defines HAS_CLOSEDIR if closedir() is
380 This variable conditionally defines the HASCONST symbol, which
381 indicates to the C program that this C compiler knows about the
385 This variable conditionally defines the CRYPT symbol, which
386 indicates to the C program that the crypt() routine is available
387 to encrypt passwords and the like.
390 This variable conditionally defines the CSH symbol, which
391 indicates to the C program that the C-shell exists.
393 d_cuserid (d_cuserid.U):
394 This variable conditionally defines the HAS_CUSERID symbol, which
395 indicates to the C program that the cuserid() routine is available
396 to get character login names.
398 d_dbl_dig (d_dbl_dig.U):
399 This variable conditionally defines d_dbl_dig if this system's
400 header files provide DBL_DIG, which is the number of significant
401 digits in a double precision number.
403 d_difftime (d_difftime.U):
404 This variable conditionally defines the HAS_DIFFTIME symbol, which
405 indicates to the C program that the difftime() routine is available.
407 d_dirnamlen (i_dirent.U):
408 This variable conditionally defines DIRNAMLEN, which indicates
409 to the C program that the length of directory entry names is
410 provided by a d_namelen field.
412 d_dlerror (d_dlerror.U):
413 This variable conditionally defines the HAS_DLERROR symbol, which
414 indicates to the C program that the dlerror() routine is available.
416 d_dlopen (d_dlopen.U):
417 This variable conditionally defines the HAS_DLOPEN symbol, which
418 indicates to the C program that the dlopen() routine is available.
420 d_dlsymun (d_dlsymun.U):
421 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
422 indicates that we need to prepend an underscore to the symbol
423 name before calling dlsym().
425 d_dosuid (d_dosuid.U):
426 This variable conditionally defines the symbol DOSUID, which
427 tells the C program that it should insert setuid emulation code
428 on hosts which have setuid #! scripts disabled.
430 d_drand48proto (d_drand48proto.U):
431 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
432 which indicates to the C program that the system provides
433 a prototype for the drand48() function. Otherwise, it is
434 up to the program to supply one.
437 This variable conditionally defines HAS_DUP2 if dup2() is
438 available to duplicate file descriptors.
440 d_eaccess (d_eaccess.U):
441 This variable conditionally defines the HAS_EACCESS symbol, which
442 indicates to the C program that the eaccess() routine is available.
444 d_endgrent (d_endgrent.U):
445 This variable conditionally defines the HAS_ENDGRENT symbol, which
446 indicates to the C program that the endgrent() routine is available
447 for sequential access of the group database.
449 d_endhent (d_endhent.U):
450 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
451 available to close whatever was being used for host queries.
453 d_endnent (d_endnent.U):
454 This variable conditionally defines HAS_ENDNETENT if endnetent() is
455 available to close whatever was being used for network queries.
457 d_endpent (d_endpent.U):
458 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
459 available to close whatever was being used for protocol queries.
461 d_endpwent (d_endpwent.U):
462 This variable conditionally defines the HAS_ENDPWENT symbol, which
463 indicates to the C program that the endpwent() routine is available
464 for sequential access of the passwd database.
466 d_endsent (d_endsent.U):
467 This variable conditionally defines HAS_ENDSERVENT if endservent() is
468 available to close whatever was being used for service queries.
470 d_endspent (d_endspent.U):
471 This variable conditionally defines HAS_ENDSPENT if endspent() is
472 available to finalize the scan of SysV shadow password entries.
474 d_eofnblk (nblock_io.U):
475 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
476 when reading from a non-blocking I/O source.
479 This variable conditionally defines the symbols EUNICE and VAX, which
480 alerts the C program that it must deal with ideosyncracies of VMS.
482 d_fchmod (d_fchmod.U):
483 This variable conditionally defines the HAS_FCHMOD symbol, which
484 indicates to the C program that the fchmod() routine is available
485 to change mode of opened files.
487 d_fchown (d_fchown.U):
488 This variable conditionally defines the HAS_FCHOWN symbol, which
489 indicates to the C program that the fchown() routine is available
490 to change ownership of opened files.
493 This variable conditionally defines the HAS_FCNTL symbol, and indicates
494 whether the fcntl() function exists
496 d_fd_macros (d_fd_set.U):
497 This variable contains the eventual value of the HAS_FD_MACROS symbol,
498 which indicates if your C compiler knows about the macros which
499 manipulate an fd_set.
501 d_fd_set (d_fd_set.U):
502 This variable contains the eventual value of the HAS_FD_SET symbol,
503 which indicates if your C compiler knows about the fd_set typedef.
505 d_fds_bits (d_fd_set.U):
506 This variable contains the eventual value of the HAS_FDS_BITS symbol,
507 which indicates if your fd_set typedef contains the fds_bits member.
508 If you have an fd_set typedef, but the dweebs who installed it did
509 a half-fast job and neglected to provide the macros to manipulate
510 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
512 d_fgetpos (d_fgetpos.U):
513 This variable conditionally defines HAS_FGETPOS if fgetpos() is
514 available to get the file position indicator.
516 d_flexfnam (d_flexfnam.U):
517 This variable conditionally defines the FLEXFILENAMES symbol, which
518 indicates that the system supports filenames longer than 14 characters.
521 This variable conditionally defines HAS_FLOCK if flock() is
522 available to do file locking.
525 This variable conditionally defines the HAS_FORK symbol, which
526 indicates to the C program that the fork() routine is available.
528 d_fpathconf (d_pathconf.U):
529 This variable conditionally defines the HAS_FPATHCONF symbol, which
530 indicates to the C program that the pathconf() routine is available
531 to determine file-system related limits and options associated
532 with a given open file descriptor.
535 This symbol will be defined if the C compiler supports fpos64_t.
537 d_fs_data_s (d_fs_data_s.U):
538 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
539 which indicates that the struct fs_data is supported.
541 d_fseeko (d_fseeko.U):
542 This variable conditionally defines the HAS_FSEEKO symbol, which
543 indicates to the C program that the fseeko() routine is available.
545 d_fsetpos (d_fsetpos.U):
546 This variable conditionally defines HAS_FSETPOS if fsetpos() is
547 available to set the file position indicator.
549 d_fstatfs (d_fstatfs.U):
550 This variable conditionally defines the HAS_FSTATFS symbol, which
551 indicates to the C program that the fstatfs() routine is available.
553 d_fstatvfs (d_statvfs.U):
554 This variable conditionally defines the HAS_FSTATVFS symbol, which
555 indicates to the C program that the fstatvfs() routine is available.
557 d_ftello (d_ftello.U):
558 This variable conditionally defines the HAS_FTELLO symbol, which
559 indicates to the C program that the ftello() routine is available.
562 This variable conditionally defines the HAS_FTIME symbol, which indicates
563 that the ftime() routine exists. The ftime() routine is basically
564 a sub-second accuracy clock.
566 d_Gconvert (d_gconvert.U):
567 This variable holds what Gconvert is defined as to convert
568 floating point numbers into strings. It could be 'gconvert'
569 or a more complex macro emulating gconvert with gcvt() or sprintf.
571 d_Gconvert='gconvert((x),(n),(t),(b))'
572 d_Gconvert='gcvt((x),(n),(b))'
573 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
575 d_getgrent (d_getgrent.U):
576 This variable conditionally defines the HAS_GETGRENT symbol, which
577 indicates to the C program that the getgrent() routine is available
578 for sequential access of the group database.
580 d_getgrps (d_getgrps.U):
581 This variable conditionally defines the HAS_GETGROUPS symbol, which
582 indicates to the C program that the getgroups() routine is available
583 to get the list of process groups.
585 d_gethbyaddr (d_gethbyad.U):
586 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
587 indicates to the C program that the gethostbyaddr() routine is available
588 to look up hosts by their IP addresses.
590 d_gethbyname (d_gethbynm.U):
591 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
592 indicates to the C program that the gethostbyname() routine is available
593 to look up host names in some data base or other.
595 d_gethent (d_gethent.U):
596 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
597 available to look up host names in some data base or another.
599 d_gethname (d_gethname.U):
600 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
601 indicates to the C program that the gethostname() routine may be
602 used to derive the host name.
604 d_gethostprotos (d_gethostprotos.U):
605 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
606 which indicates to the C program that <netdb.h> supplies
607 prototypes for the various gethost*() functions.
608 See also netdbtype.U for probing for various netdb types.
610 d_getlogin (d_getlogin.U):
611 This variable conditionally defines the HAS_GETLOGIN symbol, which
612 indicates to the C program that the getlogin() routine is available
613 to get the login name.
615 d_getmnt (d_getmnt.U):
616 This variable conditionally defines the HAS_GETMNT symbol, which
617 indicates to the C program that the getmnt() routine is available
618 to retrieve one or more mount info blocks by filename.
620 d_getmntent (d_getmntent.U):
621 This variable conditionally defines the HAS_GETMNTENT symbol, which
622 indicates to the C program that the getmntent() routine is available
623 to iterate through mounted files to get their mount info.
625 d_getnbyaddr (d_getnbyad.U):
626 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
627 indicates to the C program that the getnetbyaddr() routine is available
628 to look up networks by their IP addresses.
630 d_getnbyname (d_getnbynm.U):
631 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
632 indicates to the C program that the getnetbyname() routine is available
633 to look up networks by their names.
635 d_getnent (d_getnent.U):
636 This variable conditionally defines HAS_GETNETENT if getnetent() is
637 available to look up network names in some data base or another.
639 d_getnetprotos (d_getnetprotos.U):
640 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
641 which indicates to the C program that <netdb.h> supplies
642 prototypes for the various getnet*() functions.
643 See also netdbtype.U for probing for various netdb types.
645 d_getpbyname (d_getprotby.U):
646 This variable conditionally defines the HAS_GETPROTOBYNAME
647 symbol, which indicates to the C program that the
648 getprotobyname() routine is available to look up protocols
651 d_getpbynumber (d_getprotby.U):
652 This variable conditionally defines the HAS_GETPROTOBYNUMBER
653 symbol, which indicates to the C program that the
654 getprotobynumber() routine is available to look up protocols
657 d_getpent (d_getpent.U):
658 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
659 available to look up protocols in some data base or another.
661 d_getpgid (d_getpgid.U):
662 This variable conditionally defines the HAS_GETPGID symbol, which
663 indicates to the C program that the getpgid(pid) function
664 is available to get the process group id.
666 d_getpgrp2 (d_getpgrp2.U):
667 This variable conditionally defines the HAS_GETPGRP2 symbol, which
668 indicates to the C program that the getpgrp2() (as in DG/UX) routine
669 is available to get the current process group.
671 d_getpgrp (d_getpgrp.U):
672 This variable conditionally defines HAS_GETPGRP if getpgrp() is
673 available to get the current process group.
675 d_getppid (d_getppid.U):
676 This variable conditionally defines the HAS_GETPPID symbol, which
677 indicates to the C program that the getppid() routine is available
678 to get the parent process ID.
680 d_getprior (d_getprior.U):
681 This variable conditionally defines HAS_GETPRIORITY if getpriority()
682 is available to get a process's priority.
684 d_getprotoprotos (d_getprotoprotos.U):
685 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
686 which indicates to the C program that <netdb.h> supplies
687 prototypes for the various getproto*() functions.
688 See also netdbtype.U for probing for various netdb types.
690 d_getpwent (d_getpwent.U):
691 This variable conditionally defines the HAS_GETPWENT symbol, which
692 indicates to the C program that the getpwent() routine is available
693 for sequential access of the passwd database.
695 d_getsbyname (d_getsrvby.U):
696 This variable conditionally defines the HAS_GETSERVBYNAME
697 symbol, which indicates to the C program that the
698 getservbyname() routine is available to look up services
701 d_getsbyport (d_getsrvby.U):
702 This variable conditionally defines the HAS_GETSERVBYPORT
703 symbol, which indicates to the C program that the
704 getservbyport() routine is available to look up services
707 d_getsent (d_getsent.U):
708 This variable conditionally defines HAS_GETSERVENT if getservent() is
709 available to look up network services in some data base or another.
711 d_getservprotos (d_getservprotos.U):
712 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
713 which indicates to the C program that <netdb.h> supplies
714 prototypes for the various getserv*() functions.
715 See also netdbtype.U for probing for various netdb types.
717 d_getspent (d_getspent.U):
718 This variable conditionally defines HAS_GETSPENT if getspent() is
719 available to retrieve SysV shadow password entries sequentially.
721 d_getspnam (d_getspnam.U):
722 This variable conditionally defines HAS_GETSPNAM if getspnam() is
723 available to retrieve SysV shadow password entries by name.
725 d_gettimeod (d_ftime.U):
726 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
727 indicates that the gettimeofday() system call exists (to obtain a
728 sub-second accuracy clock). You should probably include <sys/resource.h>.
730 d_gnulibc (d_gnulibc.U):
731 Defined if we're dealing with the GNU C Library.
733 d_grpasswd (i_grp.U):
734 This variable conditionally defines GRPASSWD, which indicates
735 that struct group in <grp.h> contains gr_passwd.
737 d_hasmntopt (d_hasmntopt.U):
738 This variable conditionally defines the HAS_HASMNTOPT symbol, which
739 indicates to the C program that the hasmntopt() routine is available
740 to query the mount options of file systems.
743 This variable conditionally defines HAS_HTONL if htonl() and its
744 friends are available to do network order byte swapping.
746 d_index (d_strchr.U):
747 This variable conditionally defines HAS_INDEX if index() and
748 rindex() are available for string searching.
750 d_inetaton (d_inetaton.U):
751 This variable conditionally defines the HAS_INET_ATON symbol, which
752 indicates to the C program that the inet_aton() function is available
753 to parse IP address "dotted-quad" strings.
755 d_int64t (i_inttypes.U):
756 This symbol will be defined if the C compiler supports int64_t.
758 d_iovec_s (i_sysuio.U):
759 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
760 which indicates that the struct iovec is supported.
762 d_isascii (d_isascii.U):
763 This variable conditionally defines the HAS_ISASCII constant,
764 which indicates to the C program that isascii() is available.
766 d_killpg (d_killpg.U):
767 This variable conditionally defines the HAS_KILLPG symbol, which
768 indicates to the C program that the killpg() routine is available
769 to kill process groups.
771 d_lchown (d_lchown.U):
772 This variable conditionally defines the HAS_LCHOWN symbol, which
773 indicates to the C program that the lchown() routine is available
774 to operate on a symbolic link (instead of following the link).
776 d_ldbl_dig (d_ldbl_dig.U):
777 This variable conditionally defines d_ldbl_dig if this system's
778 header files provide LDBL_DIG, which is the number of significant
779 digits in a long double precision number.
782 This variable conditionally defines HAS_LINK if link() is
783 available to create hard links.
786 This variable conditionally defines the HAS_LLSEEK symbol, which
787 indicates to the C program that the llseek() routine is available.
789 d_locconv (d_locconv.U):
790 This variable conditionally defines HAS_LOCALECONV if localeconv() is
791 available for numeric and monetary formatting conventions.
794 This variable conditionally defines HAS_LOCKF if lockf() is
795 available to do file locking.
797 d_longdbl (d_longdbl.U):
798 This variable conditionally defines HAS_LONG_DOUBLE if
799 the long double type is supported.
801 d_longlong (d_longlong.U):
802 This variable conditionally defines HAS_LONG_LONG if
803 the long long type is supported.
806 This variable conditionally defines HAS_LSTAT if lstat() is
807 available to do file stats on symbolic links.
810 This variable conditionally defines the HAS_MBLEN symbol, which
811 indicates to the C program that the mblen() routine is available
812 to find the number of bytes in a multibye character.
814 d_mbstowcs (d_mbstowcs.U):
815 This variable conditionally defines the HAS_MBSTOWCS symbol, which
816 indicates to the C program that the mbstowcs() routine is available
817 to convert a multibyte string into a wide character string.
819 d_mbtowc (d_mbtowc.U):
820 This variable conditionally defines the HAS_MBTOWC symbol, which
821 indicates to the C program that the mbtowc() routine is available
822 to convert multibyte to a wide character.
824 d_memchr (d_memchr.U):
825 This variable conditionally defines the HAS_MEMCHR symbol, which
826 indicates to the C program that the memchr() routine is available
827 to locate characters within a C string.
829 d_memcmp (d_memcmp.U):
830 This variable conditionally defines the HAS_MEMCMP symbol, which
831 indicates to the C program that the memcmp() routine is available
832 to compare blocks of memory.
834 d_memcpy (d_memcpy.U):
835 This variable conditionally defines the HAS_MEMCPY symbol, which
836 indicates to the C program that the memcpy() routine is available
837 to copy blocks of memory.
839 d_memmove (d_memmove.U):
840 This variable conditionally defines the HAS_MEMMOVE symbol, which
841 indicates to the C program that the memmove() routine is available
842 to copy potentatially overlapping blocks of memory.
844 d_memset (d_memset.U):
845 This variable conditionally defines the HAS_MEMSET symbol, which
846 indicates to the C program that the memset() routine is available
847 to set blocks of memory.
850 This variable conditionally defines the HAS_MKDIR symbol, which
851 indicates to the C program that the mkdir() routine is available
852 to create directories..
854 d_mkfifo (d_mkfifo.U):
855 This variable conditionally defines the HAS_MKFIFO symbol, which
856 indicates to the C program that the mkfifo() routine is available.
858 d_mktime (d_mktime.U):
859 This variable conditionally defines the HAS_MKTIME symbol, which
860 indicates to the C program that the mktime() routine is available.
863 This variable conditionally defines the HAS_MSG symbol, which
864 indicates that the entire msg*(2) library is present.
866 d_msg_ctrunc (d_socket.U):
867 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
868 which indicates that the MSG_CTRUNC is available. #ifdef is
869 not enough because it may be an enum, glibc has been known to do this.
871 d_msg_dontroute (d_socket.U):
872 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
873 which indicates that the MSG_DONTROUTE is available. #ifdef is
874 not enough because it may be an enum, glibc has been known to do this.
876 d_msg_oob (d_socket.U):
877 This variable conditionally defines the HAS_MSG_OOB symbol,
878 which indicates that the MSG_OOB is available. #ifdef is
879 not enough because it may be an enum, glibc has been known to do this.
881 d_msg_peek (d_socket.U):
882 This variable conditionally defines the HAS_MSG_PEEK symbol,
883 which indicates that the MSG_PEEK is available. #ifdef is
884 not enough because it may be an enum, glibc has been known to do this.
886 d_msg_proxy (d_socket.U):
887 This variable conditionally defines the HAS_MSG_PROXY symbol,
888 which indicates that the MSG_PROXY is available. #ifdef is
889 not enough because it may be an enum, glibc has been known to do this.
891 d_msgctl (d_msgctl.U):
892 This variable conditionally defines the HAS_MSGCTL symbol, which
893 indicates to the C program that the msgctl() routine is available.
895 d_msgget (d_msgget.U):
896 This variable conditionally defines the HAS_MSGGET symbol, which
897 indicates to the C program that the msgget() routine is available.
899 d_msgrcv (d_msgrcv.U):
900 This variable conditionally defines the HAS_MSGRCV symbol, which
901 indicates to the C program that the msgrcv() routine is available.
903 d_msgsnd (d_msgsnd.U):
904 This variable conditionally defines the HAS_MSGSND symbol, which
905 indicates to the C program that the msgsnd() routine is available.
907 d_mymalloc (mallocsrc.U):
908 This variable conditionally defines MYMALLOC in case other parts
909 of the source want to take special action if MYMALLOC is used.
910 This may include different sorts of profiling or error detection.
913 This variable conditionally defines the HAS_NICE symbol, which
914 indicates to the C program that the nice() routine is available.
917 This symbol will be defined if the C compiler supports off64_t.
919 d_old_pthread_create_joinable (d_pthrattrj.U):
920 This variable conditionally defines pthread_create_joinable.
921 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
923 d_oldpthreads (usethreads.U):
924 This variable conditionally defines the OLD_PTHREADS_API symbol,
925 and indicates that Perl should be built to use the old
926 draft POSIX threads API. This is only potentially meaningful if
929 d_oldsock (d_socket.U):
930 This variable conditionally defines the OLDSOCKET symbol, which
931 indicates that the BSD socket interface is based on 4.1c and not 4.2.
934 This variable conditionally defines the HAS_OPEN3 manifest constant,
935 which indicates to the C program that the 3 argument version of
936 the open(2) function is available.
938 d_pathconf (d_pathconf.U):
939 This variable conditionally defines the HAS_PATHCONF symbol, which
940 indicates to the C program that the pathconf() routine is available
941 to determine file-system related limits and options associated
942 with a given filename.
945 This variable conditionally defines the HAS_PAUSE symbol, which
946 indicates to the C program that the pause() routine is available
947 to suspend a process until a signal is received.
949 d_phostname (d_gethname.U):
950 This variable conditionally defines the HAS_PHOSTNAME symbol, which
951 contains the shell command which, when fed to popen(), may be
952 used to derive the host name.
955 This variable conditionally defines the HAS_PIPE symbol, which
956 indicates to the C program that the pipe() routine is available
957 to create an inter-process channel.
960 This variable conditionally defines the HAS_POLL symbol, which
961 indicates to the C program that the poll() routine is available
962 to poll active file descriptors.
964 d_portable (d_portable.U):
965 This variable conditionally defines the PORTABLE symbol, which
966 indicates to the C program that it should not assume that it is
967 running on the machine it was compiled on.
969 d_PRId64 (quadfio.U):
970 This variable conditionally defines the PERL_PRId64 symbol, which
971 indiciates that stdio has a symbol to print 64-bit decimal numbers.
973 d_PRIeldbl (longdblfio.U):
974 This variable conditionally defines the PERL_PRIfldlbl symbol, which
975 indiciates that stdio has a symbol to print long doubles.
977 d_PRIEldbl (longdblfio.U):
978 This variable conditionally defines the PERL_PRIfldlbl symbol, which
979 indiciates that stdio has a symbol to print long doubles.
981 d_PRIfldbl (longdblfio.U):
982 This variable conditionally defines the PERL_PRIfldlbl symbol, which
983 indiciates that stdio has a symbol to print long doubles.
985 d_PRIFldbl (longdblfio.U):
986 This variable conditionally defines the PERL_PRIfldlbl symbol, which
987 indiciates that stdio has a symbol to print long doubles.
989 d_PRIgldbl (longdblfio.U):
990 This variable conditionally defines the PERL_PRIfldlbl symbol, which
991 indiciates that stdio has a symbol to print long doubles.
993 d_PRIGldbl (longdblfio.U):
994 This variable conditionally defines the PERL_PRIfldlbl symbol, which
995 indiciates that stdio has a symbol to print long doubles.
997 d_PRIi64 (quadfio.U):
998 This variable conditionally defines the PERL_PRIi64 symbol, which
999 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1001 d_PRIo64 (quadfio.U):
1002 This variable conditionally defines the PERL_PRIo64 symbol, which
1003 indiciates that stdio has a symbol to print 64-bit octal numbers.
1005 d_PRIu64 (quadfio.U):
1006 This variable conditionally defines the PERL_PRIu64 symbol, which
1007 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1010 d_PRIx64 (quadfio.U):
1011 This variable conditionally defines the PERL_PRIx64 symbol, which
1012 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1014 d_PRIX64 (quadfio.U):
1015 This variable conditionally defines the PERL_PRIX64 symbol, which
1016 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1018 d_pthread_yield (d_pthread_y.U):
1019 This variable conditionally defines the HAS_PTHREAD_YIELD
1020 symbol if the pthread_yield routine is available to yield
1021 the execution of the current thread.
1024 This variable conditionally defines PWAGE, which indicates
1025 that struct passwd contains pw_age.
1027 d_pwchange (i_pwd.U):
1028 This variable conditionally defines PWCHANGE, which indicates
1029 that struct passwd contains pw_change.
1031 d_pwclass (i_pwd.U):
1032 This variable conditionally defines PWCLASS, which indicates
1033 that struct passwd contains pw_class.
1035 d_pwcomment (i_pwd.U):
1036 This variable conditionally defines PWCOMMENT, which indicates
1037 that struct passwd contains pw_comment.
1039 d_pwexpire (i_pwd.U):
1040 This variable conditionally defines PWEXPIRE, which indicates
1041 that struct passwd contains pw_expire.
1043 d_pwgecos (i_pwd.U):
1044 This variable conditionally defines PWGECOS, which indicates
1045 that struct passwd contains pw_gecos.
1047 d_pwpasswd (i_pwd.U):
1048 This variable conditionally defines PWPASSWD, which indicates
1049 that struct passwd contains pw_passwd.
1051 d_pwquota (i_pwd.U):
1052 This variable conditionally defines PWQUOTA, which indicates
1053 that struct passwd contains pw_quota.
1055 d_readdir (d_readdir.U):
1056 This variable conditionally defines HAS_READDIR if readdir() is
1057 available to read directory entries.
1059 d_readlink (d_readlink.U):
1060 This variable conditionally defines the HAS_READLINK symbol, which
1061 indicates to the C program that the readlink() routine is available
1062 to read the value of a symbolic link.
1064 d_rename (d_rename.U):
1065 This variable conditionally defines the HAS_RENAME symbol, which
1066 indicates to the C program that the rename() routine is available
1069 d_rewinddir (d_readdir.U):
1070 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1073 d_rmdir (d_rmdir.U):
1074 This variable conditionally defines HAS_RMDIR if rmdir() is
1075 available to remove directories.
1077 d_safebcpy (d_safebcpy.U):
1078 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1079 the bcopy() routine can do overlapping copies.
1081 d_safemcpy (d_safemcpy.U):
1082 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1083 the memcpy() routine can do overlapping copies.
1085 d_sanemcmp (d_sanemcmp.U):
1086 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1087 the memcpy() routine is available and can be used to compare relative
1088 magnitudes of chars with their high bits set.
1090 d_sched_yield (d_pthread_y.U):
1091 This variable conditionally defines the HAS_SCHED_YIELD
1092 symbol if the sched_yield routine is available to yield
1093 the execution of the current thread.
1095 d_scm_rights (d_socket.U):
1096 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1097 which indicates that the SCM_RIGHTS is available. #ifdef is
1098 not enough because it may be an enum, glibc has been known to do this.
1100 d_seekdir (d_readdir.U):
1101 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1104 d_select (d_select.U):
1105 This variable conditionally defines HAS_SELECT if select() is
1106 available to select active file descriptors. A <sys/time.h>
1107 inclusion may be necessary for the timeout field.
1110 This variable conditionally defines the HAS_SEM symbol, which
1111 indicates that the entire sem*(2) library is present.
1113 d_semctl (d_semctl.U):
1114 This variable conditionally defines the HAS_SEMCTL symbol, which
1115 indicates to the C program that the semctl() routine is available.
1117 d_semctl_semid_ds (d_union_semun.U):
1118 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1119 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1121 d_semctl_semun (d_union_semun.U):
1122 This variable conditionally defines USE_SEMCTL_SEMUN, which
1123 indicates that union semun is to be used for semctl IPC_STAT.
1125 d_semget (d_semget.U):
1126 This variable conditionally defines the HAS_SEMGET symbol, which
1127 indicates to the C program that the semget() routine is available.
1129 d_semop (d_semop.U):
1130 This variable conditionally defines the HAS_SEMOP symbol, which
1131 indicates to the C program that the semop() routine is available.
1133 d_setegid (d_setegid.U):
1134 This variable conditionally defines the HAS_SETEGID symbol, which
1135 indicates to the C program that the setegid() routine is available
1136 to change the effective gid of the current program.
1138 d_seteuid (d_seteuid.U):
1139 This variable conditionally defines the HAS_SETEUID symbol, which
1140 indicates to the C program that the seteuid() routine is available
1141 to change the effective uid of the current program.
1143 d_setgrent (d_setgrent.U):
1144 This variable conditionally defines the HAS_SETGRENT symbol, which
1145 indicates to the C program that the setgrent() routine is available
1146 for initializing sequential access to the group database.
1148 d_setgrps (d_setgrps.U):
1149 This variable conditionally defines the HAS_SETGROUPS symbol, which
1150 indicates to the C program that the setgroups() routine is available
1151 to set the list of process groups.
1153 d_sethent (d_sethent.U):
1154 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1157 d_setlinebuf (d_setlnbuf.U):
1158 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1159 indicates to the C program that the setlinebuf() routine is available
1160 to change stderr or stdout from block-buffered or unbuffered to a
1163 d_setlocale (d_setlocale.U):
1164 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1165 available to handle locale-specific ctype implementations.
1167 d_setnent (d_setnent.U):
1168 This variable conditionally defines HAS_SETNETENT if setnetent() is
1171 d_setpent (d_setpent.U):
1172 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1175 d_setpgid (d_setpgid.U):
1176 This variable conditionally defines the HAS_SETPGID symbol if the
1177 setpgid(pid, gpid) function is available to set process group ID.
1179 d_setpgrp2 (d_setpgrp2.U):
1180 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1181 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1182 is available to set the current process group.
1184 d_setpgrp (d_setpgrp.U):
1185 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1186 available to set the current process group.
1188 d_setprior (d_setprior.U):
1189 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1190 is available to set a process's priority.
1192 d_setpwent (d_setpwent.U):
1193 This variable conditionally defines the HAS_SETPWENT symbol, which
1194 indicates to the C program that the setpwent() routine is available
1195 for initializing sequential access to the passwd database.
1197 d_setregid (d_setregid.U):
1198 This variable conditionally defines HAS_SETREGID if setregid() is
1199 available to change the real and effective gid of the current
1202 d_setresgid (d_setregid.U):
1203 This variable conditionally defines HAS_SETRESGID if setresgid() is
1204 available to change the real, effective and saved gid of the current
1207 d_setresuid (d_setreuid.U):
1208 This variable conditionally defines HAS_SETREUID if setresuid() is
1209 available to change the real, effective and saved uid of the current
1212 d_setreuid (d_setreuid.U):
1213 This variable conditionally defines HAS_SETREUID if setreuid() is
1214 available to change the real and effective uid of the current
1217 d_setrgid (d_setrgid.U):
1218 This variable conditionally defines the HAS_SETRGID symbol, which
1219 indicates to the C program that the setrgid() routine is available
1220 to change the real gid of the current program.
1222 d_setruid (d_setruid.U):
1223 This variable conditionally defines the HAS_SETRUID symbol, which
1224 indicates to the C program that the setruid() routine is available
1225 to change the real uid of the current program.
1227 d_setsent (d_setsent.U):
1228 This variable conditionally defines HAS_SETSERVENT if setservent() is
1231 d_setsid (d_setsid.U):
1232 This variable conditionally defines HAS_SETSID if setsid() is
1233 available to set the process group ID.
1235 d_setspent (d_setspent.U):
1236 This variable conditionally defines HAS_SETSPENT if setspent() is
1237 available to initialize the scan of SysV shadow password entries.
1239 d_setvbuf (d_setvbuf.U):
1240 This variable conditionally defines the HAS_SETVBUF symbol, which
1241 indicates to the C program that the setvbuf() routine is available
1242 to change buffering on an open stdio stream.
1245 This variable conditionally defines the USE_SFIO symbol,
1246 and indicates whether sfio is available (and should be used).
1249 This variable conditionally defines the HAS_SHM symbol, which
1250 indicates that the entire shm*(2) library is present.
1252 d_shmat (d_shmat.U):
1253 This variable conditionally defines the HAS_SHMAT symbol, which
1254 indicates to the C program that the shmat() routine is available.
1256 d_shmatprototype (d_shmat.U):
1257 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1258 symbol, which indicates that sys/shm.h has a prototype for
1261 d_shmctl (d_shmctl.U):
1262 This variable conditionally defines the HAS_SHMCTL symbol, which
1263 indicates to the C program that the shmctl() routine is available.
1265 d_shmdt (d_shmdt.U):
1266 This variable conditionally defines the HAS_SHMDT symbol, which
1267 indicates to the C program that the shmdt() routine is available.
1269 d_shmget (d_shmget.U):
1270 This variable conditionally defines the HAS_SHMGET symbol, which
1271 indicates to the C program that the shmget() routine is available.
1273 d_sigaction (d_sigaction.U):
1274 This variable conditionally defines the HAS_SIGACTION symbol, which
1275 indicates that the Vr4 sigaction() routine is available.
1277 d_sigsetjmp (d_sigsetjmp.U):
1278 This variable conditionally defines the HAS_SIGSETJMP symbol,
1279 which indicates that the sigsetjmp() routine is available to
1280 call setjmp() and optionally save the process's signal mask.
1282 d_socket (d_socket.U):
1283 This variable conditionally defines HAS_SOCKET, which indicates
1284 that the BSD socket interface is supported.
1286 d_sockpair (d_socket.U):
1287 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1288 indicates that the BSD socketpair() is supported.
1290 d_sqrtl (d_sqrtl.U):
1291 This variable conditionally defines the HAS_SQRTL symbol, which
1292 indicates to the C program that the sqrtl() routine is available.
1294 d_statblks (d_statblks.U):
1295 This variable conditionally defines USE_STAT_BLOCKS
1296 if this system has a stat structure declaring
1297 st_blksize and st_blocks.
1299 d_statfs_f_flags (d_statfs_f_flags.U):
1300 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1301 symbol, which indicates to struct statfs from has f_flags member.
1302 This kind of struct statfs is coming from sys/mount.h (BSD),
1303 not from sys/statfs.h (SYSV).
1305 d_statfs_s (d_statfs_s.U):
1306 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1307 which indicates that the struct statfs is supported.
1309 d_statvfs (d_statvfs.U):
1310 This variable conditionally defines the HAS_STATVFS symbol, which
1311 indicates to the C program that the statvfs() routine is available.
1313 d_stdio_cnt_lval (d_stdstdio.U):
1314 This variable conditionally defines STDIO_CNT_LVALUE if the
1315 FILE_cnt macro can be used as an lvalue.
1317 d_stdio_ptr_lval (d_stdstdio.U):
1318 This variable conditionally defines STDIO_PTR_LVALUE if the
1319 FILE_ptr macro can be used as an lvalue.
1321 d_stdio_stream_array (stdio_streams.U):
1322 This variable tells whether there is an array holding
1325 d_stdiobase (d_stdstdio.U):
1326 This variable conditionally defines USE_STDIO_BASE if this system
1327 has a FILE structure declaring a usable _base field (or equivalent)
1330 d_stdstdio (d_stdstdio.U):
1331 This variable conditionally defines USE_STDIO_PTR if this system
1332 has a FILE structure declaring usable _ptr and _cnt fields (or
1333 equivalent) in stdio.h.
1335 d_strchr (d_strchr.U):
1336 This variable conditionally defines HAS_STRCHR if strchr() and
1337 strrchr() are available for string searching.
1339 d_strcoll (d_strcoll.U):
1340 This variable conditionally defines HAS_STRCOLL if strcoll() is
1341 available to compare strings using collating information.
1343 d_strctcpy (d_strctcpy.U):
1344 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1345 indicates to the C program that this C compiler knows how to copy
1348 d_strerrm (d_strerror.U):
1349 This variable holds what Strerrr is defined as to translate an error
1350 code condition into an error message string. It could be 'strerror'
1351 or a more complex macro emulating strrror with sys_errlist[], or the
1352 "unknown" string when both strerror and sys_errlist are missing.
1354 d_strerror (d_strerror.U):
1355 This variable conditionally defines HAS_STRERROR if strerror() is
1356 available to translate error numbers to strings.
1358 d_strtod (d_strtod.U):
1359 This variable conditionally defines the HAS_STRTOD symbol, which
1360 indicates to the C program that the strtod() routine is available
1361 to provide better numeric string conversion than atof().
1363 d_strtol (d_strtol.U):
1364 This variable conditionally defines the HAS_STRTOL symbol, which
1365 indicates to the C program that the strtol() routine is available
1366 to provide better numeric string conversion than atoi() and friends.
1368 d_strtoul (d_strtoul.U):
1369 This variable conditionally defines the HAS_STRTOUL symbol, which
1370 indicates to the C program that the strtoul() routine is available
1371 to provide conversion of strings to unsigned long.
1373 d_strtoull (strtoull.U):
1374 This variable conditionally defines the HAS_STRTOULL symbol, which
1375 indicates to the C program that the strtoull() routine is available.
1377 d_strxfrm (d_strxfrm.U):
1378 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1379 available to transform strings.
1381 d_suidsafe (d_dosuid.U):
1382 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1383 if setuid scripts can be secure. This test looks in /dev/fd/.
1385 d_symlink (d_symlink.U):
1386 This variable conditionally defines the HAS_SYMLINK symbol, which
1387 indicates to the C program that the symlink() routine is available
1388 to create symbolic links.
1390 d_syscall (d_syscall.U):
1391 This variable conditionally defines HAS_SYSCALL if syscall() is
1392 available call arbitrary system calls.
1394 d_sysconf (d_sysconf.U):
1395 This variable conditionally defines the HAS_SYSCONF symbol, which
1396 indicates to the C program that the sysconf() routine is available
1397 to determine system related limits and options.
1399 d_sysernlst (d_strerror.U):
1400 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1401 is available to translate error numbers to the symbolic name.
1403 d_syserrlst (d_strerror.U):
1404 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1405 available to translate error numbers to strings.
1407 d_system (d_system.U):
1408 This variable conditionally defines HAS_SYSTEM if system() is
1409 available to issue a shell command.
1411 d_tcgetpgrp (d_tcgtpgrp.U):
1412 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1413 indicates to the C program that the tcgetpgrp() routine is available.
1414 to get foreground process group ID.
1416 d_tcsetpgrp (d_tcstpgrp.U):
1417 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1418 indicates to the C program that the tcsetpgrp() routine is available
1419 to set foreground process group ID.
1421 d_telldir (d_readdir.U):
1422 This variable conditionally defines HAS_TELLDIR if telldir() is
1425 d_telldirproto (d_telldirproto.U):
1426 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1427 which indicates to the C program that the system provides
1428 a prototype for the telldir() function. Otherwise, it is
1429 up to the program to supply one.
1432 This variable conditionally defines the HAS_TIME symbol, which indicates
1433 that the time() routine exists. The time() routine is normaly
1434 provided on UNIX systems.
1436 d_times (d_times.U):
1437 This variable conditionally defines the HAS_TIMES symbol, which indicates
1438 that the times() routine exists. The times() routine is normaly
1439 provided on UNIX systems. You may have to include <sys/times.h>.
1441 d_truncate (d_truncate.U):
1442 This variable conditionally defines HAS_TRUNCATE if truncate() is
1443 available to truncate files.
1445 d_tzname (d_tzname.U):
1446 This variable conditionally defines HAS_TZNAME if tzname[] is
1447 available to access timezone names.
1449 d_umask (d_umask.U):
1450 This variable conditionally defines the HAS_UMASK symbol, which
1451 indicates to the C program that the umask() routine is available.
1452 to set and get the value of the file creation mask.
1454 d_uname (d_gethname.U):
1455 This variable conditionally defines the HAS_UNAME symbol, which
1456 indicates to the C program that the uname() routine may be
1457 used to derive the host name.
1459 d_union_semun (d_union_semun.U):
1460 This variable conditionally defines HAS_UNION_SEMUN if the
1461 union semun is defined by including <sys/sem.h>.
1463 d_ustat (d_ustat.U):
1464 This variable conditionally defines HAS_USTAT if ustat() is
1465 available to query file system statistics by dev_t.
1467 d_vendorbin (vendorbin.U):
1468 This variable conditionally defines PERL_VENDORBIN.
1470 d_vendorlib (vendorlib.U):
1471 This variable conditionally defines PERL_VENDORLIB.
1473 d_vfork (d_vfork.U):
1474 This variable conditionally defines the HAS_VFORK symbol, which
1475 indicates the vfork() routine is available.
1477 d_void_closedir (d_closedir.U):
1478 This variable conditionally defines VOID_CLOSEDIR if closedir()
1479 does not return a value.
1481 d_voidsig (d_voidsig.U):
1482 This variable conditionally defines VOIDSIG if this system
1483 declares "void (*signal(...))()" in signal.h. The old way was to
1484 declare it as "int (*signal(...))()".
1486 d_voidtty (i_sysioctl.U):
1487 This variable conditionally defines USE_IOCNOTTY to indicate that the
1488 ioctl() call with TIOCNOTTY should be used to void tty association.
1489 Otherwise (on USG probably), it is enough to close the standard file
1490 decriptors and do a setpgrp().
1492 d_volatile (d_volatile.U):
1493 This variable conditionally defines the HASVOLATILE symbol, which
1494 indicates to the C program that this C compiler knows about the
1495 volatile declaration.
1497 d_vprintf (d_vprintf.U):
1498 This variable conditionally defines the HAS_VPRINTF symbol, which
1499 indicates to the C program that the vprintf() routine is available
1500 to printf with a pointer to an argument list.
1502 d_wait4 (d_wait4.U):
1503 This variable conditionally defines the HAS_WAIT4 symbol, which
1504 indicates the wait4() routine is available.
1506 d_waitpid (d_waitpid.U):
1507 This variable conditionally defines HAS_WAITPID if waitpid() is
1508 available to wait for child process.
1510 d_wcstombs (d_wcstombs.U):
1511 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1512 indicates to the C program that the wcstombs() routine is available
1513 to convert wide character strings to multibyte strings.
1515 d_wctomb (d_wctomb.U):
1516 This variable conditionally defines the HAS_WCTOMB symbol, which
1517 indicates to the C program that the wctomb() routine is available
1518 to convert a wide character to a multibyte.
1521 This variable conditionally defines the symbol XENIX, which alerts
1522 the C program that it runs under Xenix.
1525 This variable is used internally by Configure to determine the
1526 full pathname (if any) of the date program. After Configure runs,
1527 the value is reset to a plain "date" and is not useful.
1529 db_hashtype (i_db.U):
1530 This variable contains the type of the hash structure element
1531 in the <db.h> header file. In older versions of DB, it was
1532 int, while in newer ones it is u_int32_t.
1534 db_prefixtype (i_db.U):
1535 This variable contains the type of the prefix structure element
1536 in the <db.h> header file. In older versions of DB, it was
1537 int, while in newer ones it is size_t.
1539 defvoidused (voidflags.U):
1540 This variable contains the default value of the VOIDUSED symbol (15).
1542 direntrytype (i_dirent.U):
1543 This symbol is set to 'struct direct' or 'struct dirent' depending on
1544 whether dirent is available or not. You should use this pseudo type to
1545 portably declare your directory entries.
1548 This variable contains the extension that is to be used for the
1549 dynamically loaded modules that perl generaties.
1552 This variable contains the name of the dynamic loading file that
1553 will be used with the package.
1555 doublesize (doublesize.U):
1556 This variable contains the value of the DOUBLESIZE symbol, which
1557 indicates to the C program how many bytes there are in a double.
1559 drand01 (randfunc.U):
1560 Indicates the macro to be used to generate normalized
1561 random numbers. Uses randfunc, often divided by
1562 (double) (((unsigned long) 1 << randbits)) in order to
1563 normalize the result.
1564 In C programs, the macro 'Drand01' is mapped to drand01.
1566 dynamic_ext (Extensions.U):
1567 This variable holds a list of XS extension files we want to
1568 link dynamically into the package. It is used by Makefile.
1570 eagain (nblock_io.U):
1571 This variable bears the symbolic errno code set by read() when no
1572 data is present on the file and non-blocking I/O was enabled (otherwise,
1573 read() blocks naturally).
1576 This variable conditionally defines EBCDIC if this
1577 system uses EBCDIC encoding. Among other things, this
1578 means that the character ranges are not contiguous.
1582 This variable is used internally by Configure to determine the
1583 full pathname (if any) of the echo program. After Configure runs,
1584 the value is reset to a plain "echo" and is not useful.
1587 This variable is used internally by Configure to determine the
1588 full pathname (if any) of the egrep program. After Configure runs,
1589 the value is reset to a plain "egrep" and is not useful.
1592 This variable is defined but not used by Configure.
1593 The value is a plain '' and is not useful.
1596 When running under Eunice this variable contains a command which will
1597 convert a shell script to the proper form of text file for it to be
1598 executable by the shell. On other systems it is a no-op.
1601 This is an old synonym for _exe.
1604 This variable is used internally by Configure to determine the
1605 full pathname (if any) of the expr program. After Configure runs,
1606 the value is reset to a plain "expr" and is not useful.
1608 extensions (Extensions.U):
1609 This variable holds a list of all extension files (both XS and
1610 non-xs linked into the package. It is propagated to Config.pm
1611 and is typically used to test whether a particular extesion
1614 fflushall (fflushall.U):
1615 This symbol, if defined, tells that to flush
1616 all pending stdio output one must loop through all
1617 the stdio file handles stored in an array and fflush them.
1618 Note that if fflushNULL is defined, fflushall will not
1619 even be probed for and will be left undefined.
1621 fflushNULL (fflushall.U):
1622 This symbol, if defined, tells that fflush(NULL) does flush
1623 all pending stdio output.
1626 This variable is defined but not used by Configure.
1627 The value is a plain '' and is not useful.
1629 firstmakefile (Unix.U):
1630 This variable defines the first file searched by make. On unix,
1631 it is makefile (then Makefile). On case-insensitive systems,
1632 it might be something else. This is only used to deal with
1633 convoluted make depend tricks.
1636 This variable is defined but not used by Configure.
1637 The value is a plain '' and is not useful.
1639 fpostype (fpostype.U):
1640 This variable defines Fpos_t to be something like fpost_t, long,
1641 uint, or whatever type is used to declare file positions in libc.
1643 freetype (mallocsrc.U):
1644 This variable contains the return type of free(). It is usually
1645 void, but occasionally int.
1648 This variable contains the full pathname to 'ar', whether or
1649 not the user has specified 'portability'. This is only used
1653 This variable contains the full pathname to 'csh', whether or
1654 not the user has specified 'portability'. This is only used
1655 in the compiled C program, and we assume that all systems which
1656 can share this executable will have the same full pathname to
1659 full_sed (Loc_sed.U):
1660 This variable contains the full pathname to 'sed', whether or
1661 not the user has specified 'portability'. This is only used
1662 in the compiled C program, and we assume that all systems which
1663 can share this executable will have the same full pathname to
1667 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1668 indicate whether the compiler is version 1 or 2. This is used in
1669 setting some of the default cflags. It is set to '' if not gcc.
1671 gidsign (gidsign.U):
1672 This variable contains the signedness of a gidtype.
1673 1 for unsigned, -1 for signed.
1675 gidsize (gidsize.U):
1676 This variable contains the size of a gidtype in bytes.
1678 gidtype (gidtype.U):
1679 This variable defines Gid_t to be something like gid_t, int,
1680 ushort, or whatever type is used to declare the return type
1681 of getgid(). Typically, it is the type of group ids in the kernel.
1684 This variable holds the general path (space-separated) used to
1685 find libraries. It may contain directories that do not exist on
1686 this platform, libpth is the cleaned-up version.
1689 This variable is used internally by Configure to determine the
1690 full pathname (if any) of the grep program. After Configure runs,
1691 the value is reset to a plain "grep" and is not useful.
1694 This variable contains a command that produces the text of the
1695 /etc/group file. This is normally "cat /etc/group", but can be
1696 "ypcat group" when NIS is used.
1698 groupstype (groupstype.U):
1699 This variable defines Groups_t to be something like gid_t, int,
1700 ushort, or whatever type is used for the second argument to
1701 getgroups() and setgroups(). Usually, this is the same as
1702 gidtype (gid_t), but sometimes it isn't.
1705 This variable is used internally by Configure to determine the
1706 full pathname (if any) of the gzip program. After Configure runs,
1707 the value is reset to a plain "gzip" and is not useful.
1709 h_fcntl (h_fcntl.U):
1710 This is variable gets set in various places to tell i_fcntl that
1711 <fcntl.h> should be included.
1713 h_sysfile (h_sysfile.U):
1714 This is variable gets set in various places to tell i_sys_file that
1715 <sys/file.h> should be included.
1718 Gives the type of hints used for previous answers. May be one of
1719 "default", "recommended" or "previous".
1722 This variable contains a command that produces the text of the
1723 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1724 "ypcat hosts" when NIS is used.
1727 This variable contains a flag which will tell the C compiler and loader
1728 to produce a program running with a huge memory model. If the
1729 huge model is not supported, contains the flag to produce large
1730 model programs. It is up to the Makefile to use this.
1732 i_arpainet (i_arpainet.U):
1733 This variable conditionally defines the I_ARPA_INET symbol,
1734 and indicates whether a C program should include <arpa/inet.h>.
1736 i_bsdioctl (i_sysioctl.U):
1737 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1738 indicates to the C program that <sys/bsdioctl.h> exists and should
1742 This variable conditionally defines the I_DB symbol, and indicates
1743 whether a C program may include Berkeley's DB include file <db.h>.
1746 This variable conditionally defines the I_DBM symbol, which
1747 indicates to the C program that <dbm.h> exists and should
1750 i_dirent (i_dirent.U):
1751 This variable conditionally defines I_DIRENT, which indicates
1752 to the C program that it should include <dirent.h>.
1755 This variable conditionally defines the I_DLD symbol, which
1756 indicates to the C program that <dld.h> (GNU dynamic loading)
1757 exists and should be included.
1759 i_dlfcn (i_dlfcn.U):
1760 This variable conditionally defines the I_DLFCN symbol, which
1761 indicates to the C program that <dlfcn.h> exists and should
1764 i_fcntl (i_fcntl.U):
1765 This variable controls the value of I_FCNTL (which tells
1766 the C program to include <fcntl.h>).
1768 i_float (i_float.U):
1769 This variable conditionally defines the I_FLOAT symbol, and indicates
1770 whether a C program may include <float.h> to get symbols like DBL_MAX
1771 or DBL_MIN, i.e. machine dependent floating point values.
1774 This variable conditionally defines the I_GDBM symbol, which
1775 indicates to the C program that <gdbm.h> exists and should
1779 This variable conditionally defines the I_GRP symbol, and indicates
1780 whether a C program should include <grp.h>.
1782 i_inttypes (i_inttypes.U):
1783 This variable conditionally defines the I_INTTYPES symbol,
1784 and indicates whether a C program should include <inttypes.h>.
1786 i_limits (i_limits.U):
1787 This variable conditionally defines the I_LIMITS symbol, and indicates
1788 whether a C program may include <limits.h> to get symbols like WORD_BIT
1791 i_locale (i_locale.U):
1792 This variable conditionally defines the I_LOCALE symbol,
1793 and indicates whether a C program should include <locale.h>.
1795 i_machcthr (i_machcthr.U):
1796 This variable conditionally defines the I_MACH_CTHREADS symbol,
1797 and indicates whether a C program should include <mach/cthreads.h>.
1799 i_malloc (i_malloc.U):
1800 This variable conditionally defines the I_MALLOC symbol, and indicates
1801 whether a C program should include <malloc.h>.
1804 This variable conditionally defines the I_MATH symbol, and indicates
1805 whether a C program may include <math.h>.
1807 i_memory (i_memory.U):
1808 This variable conditionally defines the I_MEMORY symbol, and indicates
1809 whether a C program should include <memory.h>.
1811 i_mntent (i_mntent.U):
1812 This variable conditionally defines the I_MNTENT symbol, and indicates
1813 whether a C program should include <mntent.h>.
1816 This variable conditionally defines the I_NDBM symbol, which
1817 indicates to the C program that <ndbm.h> exists and should
1820 i_netdb (i_netdb.U):
1821 This variable conditionally defines the I_NETDB symbol, and indicates
1822 whether a C program should include <netdb.h>.
1824 i_neterrno (i_neterrno.U):
1825 This variable conditionally defines the I_NET_ERRNO symbol, which
1826 indicates to the C program that <net/errno.h> exists and should
1829 i_netinettcp (i_netinettcp.U):
1830 This variable conditionally defines the I_NETINET_TCP symbol,
1831 and indicates whether a C program should include <netinet/tcp.h>.
1834 This variable conditionally defines I_NETINET_IN, which indicates
1835 to the C program that it should include <netinet/in.h>. Otherwise,
1836 you may try <sys/in.h>.
1839 This variable conditionally defines the I_POLL symbol, and indicates
1840 whether a C program should include <poll.h>.
1842 i_pthread (i_pthread.U):
1843 This variable conditionally defines the I_PTHREAD symbol,
1844 and indicates whether a C program should include <pthread.h>.
1847 This variable conditionally defines I_PWD, which indicates
1848 to the C program that it should include <pwd.h>.
1850 i_rpcsvcdbm (i_dbm.U):
1851 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1852 indicates to the C program that <rpcsvc/dbm.h> exists and should
1853 be included. Some System V systems might need this instead of <dbm.h>.
1856 This variable conditionally defines the I_SFIO symbol,
1857 and indicates whether a C program should include <sfio.h>.
1859 i_sgtty (i_termio.U):
1860 This variable conditionally defines the I_SGTTY symbol, which
1861 indicates to the C program that it should include <sgtty.h> rather
1864 i_shadow (i_shadow.U):
1865 This variable conditionally defines the I_SHADOW symbol, and indicates
1866 whether a C program should include <shadow.h>.
1868 i_socks (i_socks.U):
1869 This variable conditionally defines the I_SOCKS symbol, and indicates
1870 whether a C program should include <socks.h>.
1872 i_stdarg (i_varhdr.U):
1873 This variable conditionally defines the I_STDARG symbol, which
1874 indicates to the C program that <stdarg.h> exists and should
1877 i_stddef (i_stddef.U):
1878 This variable conditionally defines the I_STDDEF symbol, which
1879 indicates to the C program that <stddef.h> exists and should
1882 i_stdlib (i_stdlib.U):
1883 This variable conditionally defines the I_STDLIB symbol, which
1884 indicates to the C program that <stdlib.h> exists and should
1887 i_string (i_string.U):
1888 This variable conditionally defines the I_STRING symbol, which
1889 indicates that <string.h> should be included rather than <strings.h>.
1891 i_sysaccess (i_sysaccess.U):
1892 This variable conditionally defines the I_SYS_ACCESS symbol,
1893 and indicates whether a C program should include <sys/access.h>.
1895 i_sysdir (i_sysdir.U):
1896 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1897 whether a C program should include <sys/dir.h>.
1899 i_sysfile (i_sysfile.U):
1900 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1901 whether a C program should include <sys/file.h> to get R_OK and friends.
1903 i_sysfilio (i_sysioctl.U):
1904 This variable conditionally defines the I_SYS_FILIO symbol, which
1905 indicates to the C program that <sys/filio.h> exists and should
1906 be included in preference to <sys/ioctl.h>.
1909 This variable conditionally defines I_SYS_IN, which indicates
1910 to the C program that it should include <sys/in.h> instead of
1913 i_sysioctl (i_sysioctl.U):
1914 This variable conditionally defines the I_SYS_IOCTL symbol, which
1915 indicates to the C program that <sys/ioctl.h> exists and should
1918 i_sysmount (i_sysmount.U):
1919 This variable conditionally defines the I_SYSMOUNT symbol,
1920 and indicates whether a C program should include <sys/mount.h>.
1922 i_sysndir (i_sysndir.U):
1923 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1924 whether a C program should include <sys/ndir.h>.
1926 i_sysparam (i_sysparam.U):
1927 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1928 whether a C program should include <sys/param.h>.
1930 i_sysresrc (i_sysresrc.U):
1931 This variable conditionally defines the I_SYS_RESOURCE symbol,
1932 and indicates whether a C program should include <sys/resource.h>.
1934 i_syssecrt (i_syssecrt.U):
1935 This variable conditionally defines the I_SYS_SECURITY symbol,
1936 and indicates whether a C program should include <sys/security.h>.
1938 i_sysselct (i_sysselct.U):
1939 This variable conditionally defines I_SYS_SELECT, which indicates
1940 to the C program that it should include <sys/select.h> in order to
1941 get the definition of struct timeval.
1943 i_syssockio (i_sysioctl.U):
1944 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1945 C program that socket ioctl codes may be found in <sys/sockio.h>
1946 instead of <sys/ioctl.h>.
1948 i_sysstat (i_sysstat.U):
1949 This variable conditionally defines the I_SYS_STAT symbol,
1950 and indicates whether a C program should include <sys/stat.h>.
1952 i_sysstatfs (i_sysstatfs.U):
1953 This variable conditionally defines the I_SYSSTATFS symbol,
1954 and indicates whether a C program should include <sys/statfs.h>.
1956 i_sysstatvfs (i_sysstatvfs.U):
1957 This variable conditionally defines the I_SYSSTATVFS symbol,
1958 and indicates whether a C program should include <sys/statvfs.h>.
1960 i_systime (i_time.U):
1961 This variable conditionally defines I_SYS_TIME, which indicates
1962 to the C program that it should include <sys/time.h>.
1964 i_systimek (i_time.U):
1965 This variable conditionally defines I_SYS_TIME_KERNEL, which
1966 indicates to the C program that it should include <sys/time.h>
1967 with KERNEL defined.
1969 i_systimes (i_systimes.U):
1970 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1971 whether a C program should include <sys/times.h>.
1973 i_systypes (i_systypes.U):
1974 This variable conditionally defines the I_SYS_TYPES symbol,
1975 and indicates whether a C program should include <sys/types.h>.
1977 i_sysuio (i_sysuio.U):
1978 This variable conditionally defines the I_SYSUIO symbol, and indicates
1979 whether a C program should include <sys/uio.h>.
1981 i_sysun (i_sysun.U):
1982 This variable conditionally defines I_SYS_UN, which indicates
1983 to the C program that it should include <sys/un.h> to get UNIX
1984 domain socket definitions.
1986 i_sysvfs (i_sysvfs.U):
1987 This variable conditionally defines the I_SYSVFS symbol,
1988 and indicates whether a C program should include <sys/vfs.h>.
1990 i_syswait (i_syswait.U):
1991 This variable conditionally defines I_SYS_WAIT, which indicates
1992 to the C program that it should include <sys/wait.h>.
1994 i_termio (i_termio.U):
1995 This variable conditionally defines the I_TERMIO symbol, which
1996 indicates to the C program that it should include <termio.h> rather
1999 i_termios (i_termio.U):
2000 This variable conditionally defines the I_TERMIOS symbol, which
2001 indicates to the C program that the POSIX <termios.h> file is
2005 This variable conditionally defines I_TIME, which indicates
2006 to the C program that it should include <time.h>.
2008 i_unistd (i_unistd.U):
2009 This variable conditionally defines the I_UNISTD symbol, and indicates
2010 whether a C program should include <unistd.h>.
2012 i_ustat (i_ustat.U):
2013 This variable conditionally defines the I_USTAT symbol, and indicates
2014 whether a C program should include <ustat.h>.
2016 i_utime (i_utime.U):
2017 This variable conditionally defines the I_UTIME symbol, and indicates
2018 whether a C program should include <utime.h>.
2020 i_values (i_values.U):
2021 This variable conditionally defines the I_VALUES symbol, and indicates
2022 whether a C program may include <values.h> to get symbols like MAXLONG
2025 i_varargs (i_varhdr.U):
2026 This variable conditionally defines I_VARARGS, which indicates
2027 to the C program that it should include <varargs.h>.
2029 i_varhdr (i_varhdr.U):
2030 Contains the name of the header to be included to get va_dcl definition.
2031 Typically one of varargs.h or stdarg.h.
2033 i_vfork (i_vfork.U):
2034 This variable conditionally defines the I_VFORK symbol, and indicates
2035 whether a C program should include vfork.h.
2037 ignore_versioned_solibs (libs.U):
2038 This variable should be non-empty if non-versioned shared
2039 libraries (libfoo.so.x.y) are to be ignored (because they
2040 cannot be linked against).
2043 This variable must preceed the normal include path to get hte
2044 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2045 Value can be "" or "/bsd43" on mips.
2048 This variable is defined but not used by Configure.
2049 The value is a plain '' and is not useful.
2051 installarchlib (archlib.U):
2052 This variable is really the same as archlibexp but may differ on
2053 those systems using AFS. For extra portability, only this variable
2054 should be used in makefiles.
2057 This variable is the same as binexp unless AFS is running in which case
2058 the user is explicitely prompted for it. This variable should always
2059 be used in your makefiles for maximum portability.
2061 installman1dir (man1dir.U):
2062 This variable is really the same as man1direxp, unless you are using
2063 AFS in which case it points to the read/write location whereas
2064 man1direxp only points to the read-only access location. For extra
2065 portability, you should only use this variable within your makefiles.
2067 installman3dir (man3dir.U):
2068 This variable is really the same as man3direxp, unless you are using
2069 AFS in which case it points to the read/write location whereas
2070 man3direxp only points to the read-only access location. For extra
2071 portability, you should only use this variable within your makefiles.
2073 installprefix (installprefix.U):
2074 This variable holds the name of the directory below which
2075 "make install" will install the package. For most users, this
2076 is the same as prefix. However, it is useful for
2077 installing the software into a different (usually temporary)
2078 location after which it can be bundled up and moved somehow
2079 to the final location specified by prefix.
2081 installprefixexp (installprefix.U):
2082 This variable holds the full absolute path of installprefix
2083 with all ~-expansion done.
2085 installprivlib (privlib.U):
2086 This variable is really the same as privlibexp but may differ on
2087 those systems using AFS. For extra portability, only this variable
2088 should be used in makefiles.
2090 installscript (scriptdir.U):
2091 This variable is usually the same as scriptdirexp, unless you are on
2092 a system running AFS, in which case they may differ slightly. You
2093 should always use this variable within your makefiles for portability.
2095 installsitearch (sitearch.U):
2096 This variable is really the same as sitearchexp but may differ on
2097 those systems using AFS. For extra portability, only this variable
2098 should be used in makefiles.
2100 installsitebin (sitebin.U):
2101 This variable is usually the same as sitebinexp, unless you are on
2102 a system running AFS, in which case they may differ slightly. You
2103 should always use this variable within your makefiles for portability.
2105 installsitelib (sitelib.U):
2106 This variable is really the same as sitelibexp but may differ on
2107 those systems using AFS. For extra portability, only this variable
2108 should be used in makefiles.
2110 installstyle (installstyle.U):
2111 This variable describes the "style" of the perl installation.
2112 This is intended to be useful for tools that need to
2113 manipulate entire perl distributions. Perl itself doesn't use
2114 this to find its libraries -- the library directories are
2115 stored directly in Config.pm. Currently, there are only two
2116 styles: "lib" and "lib/perl5". The default library locations
2117 (e.g. privlib, sitelib) are either $prefix/lib or
2118 $prefix/lib/perl5. The former is useful if $prefix is a
2119 directory dedicated to perl (e.g. /opt/perl), while the latter
2120 is useful if $prefix is shared by many packages, e.g. if
2122 This may later be extended to include other information, so
2123 be careful with pattern-matching on the results.
2124 For compatibility with perl5.005 and earlier, the default
2125 setting is based on whether or not $prefix contains the string
2128 installusrbinperl (instubperl.U):
2129 This variable tells whether Perl should be installed also as
2130 /usr/bin/perl in addition to
2133 installvendorbin (vendorbin.U):
2134 This variable is really the same as vendorbinexp but may differ on
2135 those systems using AFS. For extra portability, only this variable
2136 should be used in makefiles.
2138 installvendorlib (vendorlib.U):
2139 This variable is really the same as vendorlibexp but may differ on
2140 those systems using AFS. For extra portability, only this variable
2141 should be used in makefiles.
2143 intsize (intsize.U):
2144 This variable contains the value of the INTSIZE symbol, which
2145 indicates to the C program how many bytes there are in an int.
2147 known_extensions (Extensions.U):
2148 This variable holds a list of all XS extensions included in
2152 This variable is defined but not used by Configure.
2153 The value is a plain '' and is not useful.
2156 This variable contains a flag which will tell the C compiler and loader
2157 to produce a program running with a large memory model. It is up to
2158 the Makefile to use this.
2161 This variable indicates the program to be used to link
2162 libraries for dynamic loading. On some systems, it is 'ld'.
2163 On ELF systems, it should be $cc. Mostly, we'll try to respect
2164 the hint file setting.
2166 lddlflags (dlsrc.U):
2167 This variable contains any special flags that might need to be
2168 passed to $ld to create a shared library suitable for dynamic
2169 loading. It is up to the makefile to use it. For hpux, it
2170 should be '-b'. For sunos 4.1, it is empty.
2172 ldflags (ccflags.U):
2173 This variable contains any additional C loader flags desired by
2174 the user. It is up to the Makefile to use this.
2176 ldlibpthname (libperl.U):
2177 This variable holds the name of the shared library
2178 search path, often LD_LIBRARY_PATH. To get an empty
2179 string, the hints file must set this to 'none'.
2182 This variable is used internally by Configure to determine the
2183 full pathname (if any) of the less program. After Configure runs,
2184 the value is reset to a plain "less" and is not useful.
2187 This is an old synonym for _a.
2190 This variable contains the location of the C library.
2192 libperl (libperl.U):
2193 The perl executable is obtained by linking perlmain.c with
2194 libperl, any static extensions (usually just DynaLoader),
2195 and any other libraries needed on this system. libperl
2196 is usually libperl.a, but can also be libperl.so.xxx if
2197 the user wishes to build a perl executable with a shared
2201 This variable holds the general path (space-separated) used to find
2202 libraries. It is intended to be used by other units.
2205 This variable holds the additional libraries we want to use.
2206 It is up to the Makefile to deal with it.
2208 libswanted (Myinit.U):
2209 This variable holds a list of all the libraries we want to
2210 search. The order is chosen to pick up the c library
2211 ahead of ucb or bsd libraries for SVR4.
2214 This variable is defined but not used by Configure.
2215 The value is a plain '' and is not useful.
2218 This variable is defined but not used by Configure.
2219 The value is a plain '' and is not useful.
2221 lkflags (ccflags.U):
2222 This variable contains any additional C partial linker flags desired by
2223 the user. It is up to the Makefile to use this.
2226 This variable is used internally by Configure to determine the
2227 full pathname (if any) of the ln program. After Configure runs,
2228 the value is reset to a plain "ln" and is not useful.
2231 This variable holds the name of the command to make
2232 symbolic links (if they are supported). It can be used
2233 in the Makefile. It is either 'ln -s' or 'ln'
2235 locincpth (ccflags.U):
2236 This variable contains a list of additional directories to be
2237 searched by the compiler. The appropriate '-I' directives will
2238 be added to ccflags. This is intended to simplify setting
2239 local directories from the Configure command line.
2240 It's not much, but it parallels the loclibpth stuff in libpth.U.
2242 loclibpth (libpth.U):
2243 This variable holds the paths (space-separated) used to find local
2244 libraries. It is prepended to libpth, and is intended to be easily
2245 set from the command line.
2247 longdblsize (d_longdbl.U):
2248 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2249 indicates to the C program how many bytes there are in a long double,
2250 if this system supports long doubles.
2252 longlongsize (d_longlong.U):
2253 This variable contains the value of the LONGLONGSIZE symbol, which
2254 indicates to the C program how many bytes there are in a long long,
2255 if this system supports long long.
2257 longsize (intsize.U):
2258 This variable contains the value of the LONGSIZE symbol, which
2259 indicates to the C program how many bytes there are in a long.
2262 This variable is defined but not used by Configure.
2263 The value is a plain '' and is not useful.
2266 This variable is defined but not used by Configure.
2267 The value is a plain '' and is not useful.
2270 This variable is used internally by Configure to determine the
2271 full pathname (if any) of the ls program. After Configure runs,
2272 the value is reset to a plain "ls" and is not useful.
2274 lseeksize (lseektype.U):
2275 This variable defines lseektype to be something like off_t, long,
2276 or whatever type is used to declare lseek offset's type in the
2277 kernel (which also appears to be lseek's return type).
2279 lseektype (lseektype.U):
2280 This variable defines lseektype to be something like off_t, long,
2281 or whatever type is used to declare lseek offset's type in the
2282 kernel (which also appears to be lseek's return type).
2285 This variable is defined but not used by Configure.
2286 The value is a plain '' and is not useful.
2289 This variable is defined but not used by Configure.
2290 The value is a plain '' and is not useful.
2293 This variable is used internally by Configure to determine the
2294 full pathname (if any) of the make program. After Configure runs,
2295 the value is reset to a plain "make" and is not useful.
2297 make_set_make (make.U):
2298 Some versions of 'make' set the variable MAKE. Others do not.
2299 This variable contains the string to be included in Makefile.SH
2300 so that MAKE is set if needed, and not if not needed.
2301 Possible values are:
2302 make_set_make='#' # If your make program handles this for you,
2303 make_set_make="MAKE=$make" # if it doesn't.
2304 I used a comment character so that we can distinguish a
2305 'set' value (from a previous config.sh or Configure '-D' option)
2306 from an uncomputed value.
2308 mallocobj (mallocsrc.U):
2309 This variable contains the name of the malloc.o that this package
2310 generates, if that malloc.o is preferred over the system malloc.
2311 Otherwise the value is null. This variable is intended for generating
2312 Makefiles. See mallocsrc.
2314 mallocsrc (mallocsrc.U):
2315 This variable contains the name of the malloc.c that comes with
2316 the package, if that malloc.c is preferred over the system malloc.
2317 Otherwise the value is null. This variable is intended for generating
2320 malloctype (mallocsrc.U):
2321 This variable contains the kind of ptr returned by malloc and realloc.
2323 man1dir (man1dir.U):
2324 This variable contains the name of the directory in which manual
2325 source pages are to be put. It is the responsibility of the
2326 Makefile.SH to get the value of this into the proper command.
2327 You must be prepared to do the ~name expansion yourself.
2329 man1direxp (man1dir.U):
2330 This variable is the same as the man1dir variable, but is filename
2331 expanded at configuration time, for convenient use in makefiles.
2333 man1ext (man1dir.U):
2334 This variable contains the extension that the manual page should
2335 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2338 man3dir (man3dir.U):
2339 This variable contains the name of the directory in which manual
2340 source pages are to be put. It is the responsibility of the
2341 Makefile.SH to get the value of this into the proper command.
2342 You must be prepared to do the ~name expansion yourself.
2344 man3direxp (man3dir.U):
2345 This variable is the same as the man3dir variable, but is filename
2346 expanded at configuration time, for convenient use in makefiles.
2348 man3ext (man3dir.U):
2349 This variable contains the extension that the manual page should
2350 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2354 This variable is used internally by Configure to determine the
2355 full pathname (if any) of the Mcc program. After Configure runs,
2356 the value is reset to a plain "Mcc" and is not useful.
2359 This variable contains a flag which will tell the C compiler and loader
2360 to produce a program running with a medium memory model. If the
2361 medium model is not supported, contains the flag to produce large
2362 model programs. It is up to the Makefile to use this.
2364 mips_type (usrinc.U):
2365 This variable holds the environment type for the mips system.
2366 Possible values are "BSD 4.3" and "System V".
2369 This variable is used internally by Configure to determine the
2370 full pathname (if any) of the mkdir program. After Configure runs,
2371 the value is reset to a plain "mkdir" and is not useful.
2374 This variable contains the list of memory models supported by this
2375 system. Possible component values are none, split, unsplit, small,
2376 medium, large, and huge. The component values are space separated.
2378 modetype (modetype.U):
2379 This variable defines modetype to be something like mode_t,
2380 int, unsigned short, or whatever type is used to declare file
2381 modes for system calls.
2384 This variable is used internally by Configure to determine the
2385 full pathname (if any) of the more program. After Configure runs,
2386 the value is reset to a plain "more" and is not useful.
2388 multiarch (multiarch.U):
2389 This variable conditionally defines the MULTIARCH symbol
2390 which signifies the presence of multiplatform files.
2391 This is normally set by hints files.
2394 This variable is defined but not used by Configure.
2395 The value is a plain '' and is not useful.
2397 myarchname (archname.U):
2398 This variable holds the architecture name computed by Configure in
2399 a previous run. It is not intended to be perused by any user and
2400 should never be set in a hint file.
2402 mydomain (myhostname.U):
2403 This variable contains the eventual value of the MYDOMAIN symbol,
2404 which is the domain of the host the program is going to run on.
2405 The domain must be appended to myhostname to form a complete host name.
2406 The dot comes with mydomain, and need not be supplied by the program.
2408 myhostname (myhostname.U):
2409 This variable contains the eventual value of the MYHOSTNAME symbol,
2410 which is the name of the host the program is going to run on.
2411 The domain is not kept with hostname, but must be gotten from mydomain.
2412 The dot comes with mydomain, and need not be supplied by the program.
2414 myuname (Oldconfig.U):
2415 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2416 pseudo variables assignments in the output are stripped, thank you. The
2417 whole thing is then lower-cased.
2420 This variable contains the '-n' flag if that is what causes the echo
2421 command to suppress newline. Otherwise it is null. Correct usage is
2422 $echo $n "prompt for a question: $c".
2424 netdb_hlen_type (netdbtype.U):
2425 This variable holds the type used for the 2nd argument to
2426 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2427 This is only useful if you have gethostbyaddr(), naturally.
2429 netdb_host_type (netdbtype.U):
2430 This variable holds the type used for the 1st argument to
2431 gethostbyaddr(). Usually, this is char * or void *, possibly
2432 with or without a const prefix.
2433 This is only useful if you have gethostbyaddr(), naturally.
2435 netdb_name_type (netdbtype.U):
2436 This variable holds the type used for the argument to
2437 gethostbyname(). Usually, this is char * or const char *.
2438 This is only useful if you have gethostbyname(), naturally.
2440 netdb_net_type (netdbtype.U):
2441 This variable holds the type used for the 1st argument to
2442 getnetbyaddr(). Usually, this is int or long.
2443 This is only useful if you have getnetbyaddr(), naturally.
2446 This variable is used internally by Configure to determine the
2447 full pathname (if any) of the nm program. After Configure runs,
2448 the value is reset to a plain "nm" and is not useful.
2451 This variable holds the options that may be necessary for nm.
2453 nm_so_opt (usenm.U):
2454 This variable holds the options that may be necessary for nm
2455 to work on a shared library but that can not be used on an
2456 archive library. Currently, this is only used by Linux, where
2457 nm --dynamic is *required* to get symbols from an ELF library which
2458 has been stripped, but nm --dynamic is *fatal* on an archive library.
2459 Maybe Linux should just always set usenm=false.
2461 nonxs_ext (Extensions.U):
2462 This variable holds a list of all non-xs extensions included
2463 in the package. All of them will be built.
2466 This variable is used internally by Configure to determine the
2467 full pathname (if any) of the nroff program. After Configure runs,
2468 the value is reset to a plain "nroff" and is not useful.
2470 o_nonblock (nblock_io.U):
2471 This variable bears the symbol value to be used during open() or fcntl()
2472 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2473 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2474 but that is only supported by some devices.
2477 This is an old synonym for _o.
2479 old_pthread_create_joinable (d_pthrattrj.U):
2480 This variable defines the constant to use for creating joinable
2481 (aka undetached) pthreads. Unused if pthread.h defines
2482 PTHREAD_CREATE_JOINABLE. If used, possible values are
2483 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2485 optimize (ccflags.U):
2486 This variable contains any optimizer/debugger flag that should be used.
2487 It is up to the Makefile to use it.
2489 orderlib (orderlib.U):
2490 This variable is "true" if the components of libraries must be ordered
2491 (with `lorder $* | tsort`) before placing them in an archive. Set to
2492 "false" if ranlib or ar can generate random libraries.
2494 osname (Oldconfig.U):
2495 This variable contains the operating system name (e.g. sunos,
2496 solaris, hpux, etc.). It can be useful later on for setting
2497 defaults. Any spaces are replaced with underscores. It is set
2498 to a null string if we can't figure it out.
2500 osvers (Oldconfig.U):
2501 This variable contains the operating system version (e.g.
2502 4.1.3, 5.2, etc.). It is primarily used for helping select
2503 an appropriate hints file, but might be useful elsewhere for
2504 setting defaults. It is set to '' if we can't figure it out.
2505 We try to be flexible about how much of the version number
2506 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2507 same for this package, hints files might just be os_4.0 or
2508 os_4.1, etc., not keeping separate files for each little release.
2510 package (package.U):
2511 This variable contains the name of the package being constructed.
2512 It is primarily intended for the use of later Configure units.
2515 This variable contains the name of the preferred pager on the system.
2516 Usual values are (the full pathnames of) more, less, pg, or cat.
2519 This variable contains a command that produces the text of the
2520 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2521 "ypcat passwd" when NIS is used.
2523 patchlevel (patchlevel.U):
2524 The patchlevel level of this package.
2525 The value of patchlevel comes from the patchlevel.h file.
2528 This is an old synonym for p_ in Head.U, the character
2529 used to separate elements in the command shell search PATH.
2532 This variable is defined but not used by Configure.
2533 The value is a plain '' and is not useful.
2535 PERL_APIVERSION (Oldsyms.U):
2536 This value is manually set in patchlevel.h and is used
2537 to set the Configure apiversion variable.
2539 PERL_REVISION (Oldsyms.U):
2540 In a Perl version number such as 5.6.2, this is the 5.
2541 This value is manually set in patchlevel.h
2543 PERL_SUBVERSION (Oldsyms.U):
2544 In a Perl version number such as 5.6.2, this is the 2.
2545 Values greater than 50 represent potentially unstable
2546 development subversions.
2547 This value is manually set in patchlevel.h
2549 PERL_VERSION (Oldsyms.U):
2550 In a Perl version number such as 5.6.2, this is the 6.
2551 This value is manually set in patchlevel.h
2553 perladmin (perladmin.U):
2554 Electronic mail address of the perl5 administrator.
2556 perlpath (perlpath.U):
2557 This variable contains the eventual value of the PERLPATH symbol,
2558 which contains the name of the perl interpreter to be used in
2559 shell scripts and in the "eval 'exec'" idiom.
2562 This variable is used internally by Configure to determine the
2563 full pathname (if any) of the pg program. After Configure runs,
2564 the value is reset to a plain "pg" and is not useful.
2566 phostname (myhostname.U):
2567 This variable contains the eventual value of the PHOSTNAME symbol,
2568 which is a command that can be fed to popen() to get the host name.
2569 The program should probably not presume that the domain is or isn't
2572 pidtype (pidtype.U):
2573 This variable defines PIDTYPE to be something like pid_t, int,
2574 ushort, or whatever type is used to declare process ids in the kernel.
2577 Holds the private path used by Configure to find out the libraries.
2578 Its value is prepend to libpth. This variable takes care of special
2579 machines, like the mips. Usually, it should be empty.
2581 pm_apiversion (xs_apiversion.U):
2582 This variable contains the version of the oldest perl
2583 compatible with the present perl. (That is, pure perl modules
2584 written for $pm_apiversion will still work for the current
2585 version). perl.c:incpush() and lib/lib.pm will automatically
2586 search in $sitelib for older directories across major versions
2587 back to pm_apiversion. This is only useful if you have a perl
2588 library directory tree structured like the default one. The
2589 versioned site_perl library was introduced in 5.005, so that's
2590 the default setting for this variable. It's hard to imagine
2591 it changing before Perl6. It is included here for symmetry
2592 with xs_apiveprsion -- the searching algorithms will
2593 (presumably) be similar.
2594 See the INSTALL file for how this works.
2597 This variable is defined but not used by Configure.
2598 The value is a plain '' and is not useful.
2601 This variable is defined but not used by Configure.
2602 The value is a plain '' and is not useful.
2605 This variable holds the name of the directory below which the
2606 user will install the package. Usually, this is /usr/local, and
2607 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2608 man pages in /usr/local/man, etc. It is only used to set defaults
2609 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2611 prefixexp (prefix.U):
2612 This variable holds the full absolute path of the directory below
2613 which the user will install the package. Derived from prefix.
2615 privlib (privlib.U):
2616 This variable contains the eventual value of the PRIVLIB symbol,
2617 which is the name of the private library for this package. It may
2618 have a ~ on the front. It is up to the makefile to eventually create
2619 this directory while performing installation (with ~ substitution).
2621 privlibexp (privlib.U):
2622 This variable is the ~name expanded version of privlib, so that you
2623 may use it directly in Makefiles or shell scripts.
2625 prototype (prototype.U):
2626 This variable holds the eventual value of CAN_PROTOTYPE, which
2627 indicates the C compiler can handle funciton prototypes.
2629 ptrsize (ptrsize.U):
2630 This variable contains the value of the PTRSIZE symbol, which
2631 indicates to the C program how many bytes there are in a pointer.
2633 quadcase (quadtype.U):
2634 This variable, if defined, encodes the type of a quad:
2635 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2637 quadtype (quadtype.U):
2638 This variable defines Quad_t to be something like long, int,
2639 long long, int64_t, or whatever type is used for 64-bit integers.
2641 randbits (randfunc.U):
2642 Indicates how many bits are produced by the function used to
2643 generate normalized random numbers.
2645 randfunc (randfunc.U):
2646 Indicates the name of the random number function to use.
2647 Values include drand48, random, and rand. In C programs,
2648 the 'Drand01' macro is defined to generate uniformly distributed
2649 random numbers over the range [0., 1.[ (see drand01 and nrand).
2651 randseedtype (randfunc.U):
2652 Indicates the type of the argument of the seedfunc.
2654 ranlib (orderlib.U):
2655 This variable is set to the pathname of the ranlib program, if it is
2656 needed to generate random libraries. Set to ":" if ar can generate
2657 random libraries or if random libraries are not supported
2659 rd_nodata (nblock_io.U):
2660 This variable holds the return code from read() when no data is
2661 present. It should be -1, but some systems return 0 when O_NDELAY is
2662 used, which is a shame because you cannot make the difference between
2663 no data and an EOF.. Sigh!
2666 This variable is used internally by Configure to determine the
2667 full pathname (if any) of the rm program. After Configure runs,
2668 the value is reset to a plain "rm" and is not useful.
2671 This variable is defined but not used by Configure.
2672 The value is a plain '' and is not useful.
2675 This variable contains 'true' or 'false' depending whether the
2676 nm extraction should be performed or not, according to the value
2677 of usenm and the flags on the Configure command line.
2679 sched_yield (d_pthread_y.U):
2680 This variable defines the way to yield the execution
2681 of the current thread.
2683 scriptdir (scriptdir.U):
2684 This variable holds the name of the directory in which the user wants
2685 to put publicly scripts for the package in question. It is either
2686 the same directory as for binaries, or a special one that can be
2687 mounted across different architectures, like /usr/share. Programs
2688 must be prepared to deal with ~name expansion.
2690 scriptdirexp (scriptdir.U):
2691 This variable is the same as scriptdir, but is filename expanded
2692 at configuration time, for programs not wanting to bother with it.
2695 This variable is used internally by Configure to determine the
2696 full pathname (if any) of the sed program. After Configure runs,
2697 the value is reset to a plain "sed" and is not useful.
2699 seedfunc (randfunc.U):
2700 Indicates the random number generating seed function.
2701 Values include srand48, srandom, and srand.
2703 selectminbits (selectminbits.U):
2704 This variable holds the minimum number of bits operated by select.
2705 That is, if you do select(n, ...), how many bits at least will be
2706 cleared in the masks if some activity is detected. Usually this
2707 is either n or 32*ceil(n/32), especially many little-endians do
2708 the latter. This is only useful if you have select(), naturally.
2710 selecttype (selecttype.U):
2711 This variable holds the type used for the 2nd, 3rd, and 4th
2712 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2713 is defined, and 'int *' otherwise. This is only useful if you
2714 have select(), naturally.
2717 This variable is defined but not used by Configure.
2718 The value is a plain '' and is not useful.
2721 This variable contains the full pathname of the shell used
2722 on this system to execute Bourne shell scripts. Usually, this will be
2723 /bin/sh, though it's possible that some systems will have /bin/ksh,
2724 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2726 This unit comes before Options.U, so you can't set sh with a '-D'
2727 option, though you can override this (and startsh)
2728 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2731 This variable is defined but not used by Configure.
2732 The value is a plain '' and is not useful.
2734 sharpbang (spitshell.U):
2735 This variable contains the string #! if this system supports that
2738 shmattype (d_shmat.U):
2739 This symbol contains the type of pointer returned by shmat().
2740 It can be 'void *' or 'char *'.
2742 shortsize (intsize.U):
2743 This variable contains the value of the SHORTSIZE symbol which
2744 indicates to the C program how many bytes there are in a short.
2746 shrpenv (libperl.U):
2747 If the user builds a shared libperl.so, then we need to tell the
2748 'perl' executable where it will be able to find the installed libperl.so.
2749 One way to do this on some systems is to set the environment variable
2750 LD_RUN_PATH to the directory that will be the final location of the
2751 shared libperl.so. The makefile can use this with something like
2752 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2754 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2757 See the main perl Makefile.SH for actual working usage.
2758 Alternatively, we might be able to use a command line option such
2759 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2760 $archlibexp/CORE (Linux).
2762 shsharp (spitshell.U):
2763 This variable tells further Configure units whether your sh can
2766 sig_count (sig_name.U):
2767 This variable holds a number larger than the largest valid
2768 signal number. This is usually the same as the NSIG macro.
2770 sig_name (sig_name.U):
2771 This variable holds the signal names, space separated. The leading
2772 SIG in signal name is removed. A ZERO is prepended to the
2773 list. This is currently not used.
2775 sig_name_init (sig_name.U):
2776 This variable holds the signal names, enclosed in double quotes and
2777 separated by commas, suitable for use in the SIG_NAME definition
2778 below. A "ZERO" is prepended to the list, and the list is
2779 terminated with a plain 0. The leading SIG in signal names
2780 is removed. See sig_num.
2782 sig_num (sig_name.U):
2783 This variable holds the signal numbers, space separated. A ZERO is
2784 prepended to the list (corresponding to the fake SIGZERO), and
2785 the list is terminated with a 0. Those numbers correspond to
2786 the value of the signal listed in the same place within the
2789 sig_num_init (sig_name.U):
2790 This variable holds the signal numbers, enclosed in double quotes and
2791 separated by commas, suitable for use in the SIG_NUM definition
2792 below. A "ZERO" is prepended to the list, and the list is
2793 terminated with a plain 0.
2795 signal_t (d_voidsig.U):
2796 This variable holds the type of the signal handler (void or int).
2798 sitearch (sitearch.U):
2799 This variable contains the eventual value of the SITEARCH symbol,
2800 which is the name of the private library for this package. It may
2801 have a ~ on the front. It is up to the makefile to eventually create
2802 this directory while performing installation (with ~ substitution).
2803 The standard distribution will put nothing in this directory.
2804 After perl has been installed, users may install their own local
2805 architecture-dependent modules in this directory with
2806 MakeMaker Makefile.PL
2807 or equivalent. See INSTALL for details.
2809 sitearchexp (sitearch.U):
2810 This variable is the ~name expanded version of sitearch, so that you
2811 may use it directly in Makefiles or shell scripts.
2813 sitebin (sitebin.U):
2814 This variable holds the name of the directory in which the user wants
2815 to put add-on publicly executable files for the package in question. It
2816 is most often a local directory such as /usr/local/bin. Programs using
2817 this variable must be prepared to deal with ~name substitution.
2818 The standard distribution will put nothing in this directory.
2819 After perl has been installed, users may install their own local
2820 executables in this directory with
2821 MakeMaker Makefile.PL
2822 or equivalent. See INSTALL for details.
2824 sitebinexp (sitebin.U):
2825 This is the same as the sitebin variable, but is filename expanded at
2826 configuration time, for use in your makefiles.
2828 sitelib (sitelib.U):
2829 This variable contains the eventual value of the SITELIB symbol,
2830 which is the name of the private library for this package. It may
2831 have a ~ on the front. It is up to the makefile to eventually create
2832 this directory while performing installation (with ~ substitution).
2833 The standard distribution will put nothing in this directory.
2834 After perl has been installed, users may install their own local
2835 architecture-independent modules in this directory with
2836 MakeMaker Makefile.PL
2837 or equivalent. See INSTALL for details.
2839 sitelibexp (sitelib.U):
2840 This variable is the ~name expanded version of sitelib, so that you
2841 may use it directly in Makefiles or shell scripts.
2843 siteprefix (siteprefix.U):
2844 This variable holds the full absolute path of the directory below
2845 which the user will install add-on packages.
2846 See INSTALL for usage and examples.
2848 siteprefixexp (siteprefix.U):
2849 This variable holds the full absolute path of the directory below
2850 which the user will install add-on packages. Derived from siteprefix.
2852 sizetype (sizetype.U):
2853 This variable defines sizetype to be something like size_t,
2854 unsigned long, or whatever type is used to declare length
2855 parameters for string functions.
2858 This variable is defined but not used by Configure.
2859 The value is a plain '' and is not useful.
2862 This variable is defined but not used by Configure.
2863 The value is a plain '' and is not useful.
2866 This variable contains a flag which will tell the C compiler and loader
2867 to produce a program running with a small memory model. It is up to
2868 the Makefile to use this.
2871 This variable holds the extension used to identify shared libraries
2872 (also known as shared objects) on the system. Usually set to 'so'.
2874 sockethdr (d_socket.U):
2875 This variable has any cpp '-I' flags needed for socket support.
2877 socketlib (d_socket.U):
2878 This variable has the names of any libraries needed for socket support.
2881 This variable is used internally by Configure to determine the
2882 full pathname (if any) of the sort program. After Configure runs,
2883 the value is reset to a plain "sort" and is not useful.
2885 spackage (package.U):
2886 This variable contains the name of the package being constructed,
2887 with the first letter uppercased, i.e. suitable for starting
2890 spitshell (spitshell.U):
2891 This variable contains the command necessary to spit out a runnable
2892 shell on this system. It is either cat or a grep '-v' for # comments.
2895 This variable contains a flag which will tell the C compiler and loader
2896 to produce a program that will run in separate I and D space, for those
2897 machines that support separation of instruction and data space. It is
2898 up to the Makefile to use this.
2900 sPRId64 (quadfio.U):
2901 This variable, if defined, contains the string used by stdio to
2902 format 64-bit decimal numbers (format 'd') for output.
2904 sPRIeldbl (longdblfio.U):
2905 This variable, if defined, contains the string used by stdio to
2906 format long doubles (format 'e') for output.
2908 sPRIEldbl (longdblfio.U):
2909 This variable, if defined, contains the string used by stdio to
2910 format long doubles (format 'E') for output.
2912 sPRIfldbl (longdblfio.U):
2913 This variable, if defined, contains the string used by stdio to
2914 format long doubles (format 'f') for output.
2916 sPRIFldbl (longdblfio.U):
2917 This variable, if defined, contains the string used by stdio to
2918 format long doubles (format 'F') for output.
2920 sPRIgldbl (longdblfio.U):
2921 This variable, if defined, contains the string used by stdio to
2922 format long doubles (format 'g') for output.
2924 sPRIGldbl (longdblfio.U):
2925 This variable, if defined, contains the string used by stdio to
2926 format long doubles (format 'G') for output.
2928 sPRIi64 (quadfio.U):
2929 This variable, if defined, contains the string used by stdio to
2930 format 64-bit decimal numbers (format 'i') for output.
2932 sPRIo64 (quadfio.U):
2933 This variable, if defined, contains the string used by stdio to
2934 format 64-bit octal numbers (format 'o') for output.
2936 sPRIu64 (quadfio.U):
2937 This variable, if defined, contains the string used by stdio to
2938 format 64-bit unsigned decimal numbers (format 'u') for output.
2940 sPRIx64 (quadfio.U):
2941 This variable, if defined, contains the string used by stdio to
2942 format 64-bit hexadecimal numbers (format 'x') for output.
2944 sPRIX64 (quadfio.U):
2945 This variable, if defined, contains the string used by stdio to
2946 format 64-bit hExADECimAl numbers (format 'X') for output.
2949 This variable holds the path to the package source. It is up to
2950 the Makefile to use this variable and set VPATH accordingly to
2951 find the sources remotely.
2953 ssizetype (ssizetype.U):
2954 This variable defines ssizetype to be something like ssize_t,
2955 long or int. It is used by functions that return a count
2956 of bytes or an error condition. It must be a signed type.
2957 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2959 startperl (startperl.U):
2960 This variable contains the string to put on the front of a perl
2961 script to make sure (hopefully) that it runs with perl and not some
2962 shell. Of course, that leading line must be followed by the classical
2964 eval 'exec perl -S $0 ${1+"$@"}'
2965 if $running_under_some_shell;
2966 to guarantee perl startup should the shell execute the script. Note
2967 that this magic incatation is not understood by csh.
2969 startsh (startsh.U):
2970 This variable contains the string to put on the front of a shell
2971 script to make sure (hopefully) that it runs with sh and not some
2974 static_ext (Extensions.U):
2975 This variable holds a list of XS extension files we want to
2976 link statically into the package. It is used by Makefile.
2978 stdchar (stdchar.U):
2979 This variable conditionally defines STDCHAR to be the type of char
2980 used in stdio.h. It has the values "unsigned char" or "char".
2982 stdio_base (d_stdstdio.U):
2983 This variable defines how, given a FILE pointer, fp, to access the
2984 _base field (or equivalent) of stdio.h's FILE structure. This will
2985 be used to define the macro FILE_base(fp).
2987 stdio_bufsiz (d_stdstdio.U):
2988 This variable defines how, given a FILE pointer, fp, to determine
2989 the number of bytes store in the I/O buffer pointer to by the
2990 _base field (or equivalent) of stdio.h's FILE structure. This will
2991 be used to define the macro FILE_bufsiz(fp).
2993 stdio_cnt (d_stdstdio.U):
2994 This variable defines how, given a FILE pointer, fp, to access the
2995 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2996 be used to define the macro FILE_cnt(fp).
2998 stdio_filbuf (d_stdstdio.U):
2999 This variable defines how, given a FILE pointer, fp, to tell
3000 stdio to refill it's internal buffers (?). This will
3001 be used to define the macro FILE_filbuf(fp).
3003 stdio_ptr (d_stdstdio.U):
3004 This variable defines how, given a FILE pointer, fp, to access the
3005 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3006 be used to define the macro FILE_ptr(fp).
3008 stdio_stream_array (stdio_streams.U):
3009 This variable tells the name of the array holding the stdio streams.
3010 Usual values include _iob, __iob, and __sF.
3012 strings (i_string.U):
3013 This variable holds the full path of the string header that will be
3014 used. Typically /usr/include/string.h or /usr/include/strings.h.
3017 This variable is defined but not used by Configure.
3018 The value is a plain '' and is not useful.
3020 subversion (patchlevel.U):
3021 The subversion level of this package.
3022 The value of subversion comes from the patchlevel.h file.
3023 This is unique to perl.
3026 This variable holds the place where the manual is located on this
3027 system. It is not the place where the user wants to put his manual
3028 pages. Rather it is the place where Configure may look to find manual
3029 for unix commands (section 1 of the manual usually). See mansrc.
3032 This variable is defined but not used by Configure.
3033 The value is a plain '' and is not useful.
3036 This variable is defined but not used by Configure.
3037 The value is a plain '' and is not useful.
3040 This variable is defined but not used by Configure.
3041 The value is a plain '' and is not useful.
3044 This variable is defined but not used by Configure.
3045 The value is a plain '' and is not useful.
3048 This variable is used internally by Configure to determine the
3049 full pathname (if any) of the test program. After Configure runs,
3050 the value is reset to a plain "test" and is not useful.
3052 timeincl (i_time.U):
3053 This variable holds the full path of the included time header(s).
3055 timetype (d_time.U):
3056 This variable holds the type returned by time(). It can be long,
3057 or time_t on BSD sites (in which case <sys/types.h> should be
3058 included). Anyway, the type Time_t should be used.
3061 This variable is used internally by Configure to determine the
3062 full pathname (if any) of the touch program. After Configure runs,
3063 the value is reset to a plain "touch" and is not useful.
3066 This variable is used internally by Configure to determine the
3067 full pathname (if any) of the tr program. After Configure runs,
3068 the value is reset to a plain "tr" and is not useful.
3071 This variable contains the value to be passed to the tr(1)
3072 command to transliterate a newline. Typical values are
3073 '\012' and '\n'. This is needed for EBCDIC systems where
3074 newline is not necessarily '\012'.
3077 This variable is defined but not used by Configure.
3078 The value is a plain '' and is not useful.
3080 uidsign (uidsign.U):
3081 This variable contains the signedness of a uidtype.
3082 1 for unsigned, -1 for signed.
3084 uidsize (uidsize.U):
3085 This variable contains the size of a uidtype in bytes.
3087 uidtype (uidtype.U):
3088 This variable defines Uid_t to be something like uid_t, int,
3089 ushort, or whatever type is used to declare user ids in the kernel.
3092 This variable is used internally by Configure to determine the
3093 full pathname (if any) of the uname program. After Configure runs,
3094 the value is reset to a plain "uname" and is not useful.
3097 This variable is used internally by Configure to determine the
3098 full pathname (if any) of the uniq program. After Configure runs,
3099 the value is reset to a plain "uniq" and is not useful.
3101 uquadtype (quadtype.U):
3102 This variable defines Uquad_t to be something like unsigned long,
3103 unsigned int, unsigned long long, uint64_t, or whatever type is
3104 used for 64-bit integers.
3106 use64bits (use64bits.U):
3107 This variable conditionally defines the USE_64_BITS symbol,
3108 and indicates that explicit 64-bit interfaces should be used
3112 This variable indicates if the the system supports dynamic
3113 loading of some sort. See also dlsrc and dlobj.
3115 uselargefiles (uselfs.U):
3116 This variable conditionally defines the USE_LARGE_FILES symbol,
3117 and indicates that large file interfaces should be used when
3118 available. The use64bits symbol will also be turned on if necessary.
3120 uselongdouble (uselongdbl.U):
3121 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3122 and indicates that long doubles should be used when available.
3124 uselonglong (uselonglong.U):
3125 This variable conditionally defines the USE_LONG_LONG symbol,
3126 and indicates that long longs should be used when available.
3128 usemorebits (usemorebits.U):
3129 This variable conditionally defines the USE_MORE_BITS symbol,
3130 and indicates that explicit 64-bit interfaces and long doubles
3131 should be used when available.
3133 usemultiplicity (usemultiplicity.U):
3134 This variable conditionally defines the MULTIPLICITY symbol,
3135 and indicates that Perl should be built to use multiplicity.
3137 usemymalloc (mallocsrc.U):
3138 This variable contains y if the malloc that comes with this package
3139 is desired over the system's version of malloc. People often include
3140 special versions of malloc for effiency, but such versions are often
3141 less portable. See also mallocsrc and mallocobj.
3142 If this is 'y', then -lmalloc is removed from $libs.
3145 This variable contains 'true' or 'false' depending whether the
3146 nm extraction is wanted or not.
3148 useopcode (Extensions.U):
3149 This variable holds either 'true' or 'false' to indicate
3150 whether the Opcode extension should be used. The sole
3151 use for this currently is to allow an easy mechanism
3152 for users to skip the Opcode extension from the Configure
3155 useperlio (useperlio.U):
3156 This variable conditionally defines the USE_PERLIO symbol,
3157 and indicates that the PerlIO abstraction should be
3160 useposix (Extensions.U):
3161 This variable holds either 'true' or 'false' to indicate
3162 whether the POSIX extension should be used. The sole
3163 use for this currently is to allow an easy mechanism
3164 for hints files to indicate that POSIX will not compile
3165 on a particular system.
3168 This variable is set to true when the user agrees to use sfio.
3169 It is set to false when sfio is not available or when the user
3170 explicitely requests not to use sfio. It is here primarily so
3171 that command-line settings can override the auto-detection of
3172 d_sfio without running into a "WHOA THERE".
3174 useshrplib (libperl.U):
3175 This variable is set to 'yes' if the user wishes
3176 to build a shared libperl, and 'no' otherwise.
3178 usesocks (usesocks.U):
3179 This variable conditionally defines the USE_SOCKS symbol,
3180 and indicates that Perl should be built to use SOCKS.
3182 usethreads (usethreads.U):
3183 This variable conditionally defines the USE_THREADS symbol,
3184 and indicates that Perl should be built to use threads.
3186 usevendorprefix (vendorprefix.U):
3187 This variable tells whether the vendorprefix
3188 and consequently other vendor* paths are in use.
3190 usevfork (d_vfork.U):
3191 This variable is set to true when the user accepts to use vfork.
3192 It is set to false when no vfork is available or when the user
3193 explicitely requests not to use vfork.
3196 This variable holds the path of the include files, which is
3197 usually /usr/include. It is mainly used by other Configure units.
3200 This variable is defined but not used by Configure.
3201 The value is a plain '' and is not useful.
3203 vendorbin (vendorbin.U):
3204 This variable contains the eventual value of the VENDORBIN symbol.
3205 It may have a ~ on the front.
3206 The standard distribution will put nothing in this directory.
3207 Vendors who distribute perl may wish to place additional
3208 binaries in this directory with
3209 MakeMaker Makefile.PL INSTALLDIRS=vendor
3210 or equivalent. See INSTALL for details.
3212 vendorbinexp (vendorbin.U):
3213 This variable is the ~name expanded version of vendorbin, so that you
3214 may use it directly in Makefiles or shell scripts.
3216 vendorlib (vendorlib.U):
3217 This variable contains the eventual value of the VENDORLIB symbol,
3218 which is the name of the private library for this package.
3219 The standard distribution will put nothing in this directory.
3220 Vendors who distribute perl may wish to place their own
3221 modules in this directory with
3222 MakeMaker Makefile.PL INSTALLDIRS=vendor
3223 or equivalent. See INSTALL for details.
3225 vendorlibexp (vendorlib.U):
3226 This variable is the ~name expanded version of vendorlib, so that you
3227 may use it directly in Makefiles or shell scripts.
3229 vendorprefix (vendorprefix.U):
3230 This variable holds the full absolute path of the directory below
3231 which the vendor will install add-on packages.
3232 See INSTALL for usage and examples.
3234 vendorprefixexp (vendorprefix.U):
3235 This variable holds the full absolute path of the directory below
3236 which the vendor will install add-on packages. Derived from vendorprefix.
3238 version (patchlevel.U):
3239 The full version number of this package. This combines
3240 baserev, patchlevel, and subversion to get the full
3241 version number, including any possible subversions. Care
3242 is taken to use the C locale in order to get something
3243 like 5.004 instead of 5,004. This is unique to perl.
3246 This variable is defined but not used by Configure.
3247 The value is a plain '' and is not useful.
3249 voidflags (voidflags.U):
3250 This variable contains the eventual value of the VOIDFLAGS symbol,
3251 which indicates how much support of the void type is given by this
3252 compiler. See VOIDFLAGS for more info.
3255 This variable holds extra path (space-separated) used to find
3256 libraries on this platform, for example CPU-specific libraries
3257 (on multi-CPU platforms) may be listed here.
3259 xs_apiversion (xs_apiversion.U):
3260 This variable contains the version of the oldest perl binary
3261 compatible with the present perl. perl.c:incpush() and
3262 lib/lib.pm will automatically search in $sitearch for older
3263 directories across major versions back to xs_apiversion.
3264 This is only useful if you have a perl library directory tree
3265 structured like the default one.
3266 See INSTALL for how this works.
3267 The versioned site_perl directory was introduced in 5.005,
3268 so that is the lowest possible value.
3269 Since this can depend on compile time options (such as
3270 bincompat) it is set by Configure. Other non-default sources
3271 of potential incompatibility, such as multiplicity, threads,
3272 debugging, 64bits, sfio, etc., are not checked for currently,
3273 though in principle we could go snooping around in old
3277 This variable is defined but not used by Configure.
3278 The value is a plain '' and is not useful.
3281 This variable is used internally by Configure to determine the
3282 full pathname (if any) of the zip program. After Configure runs,
3283 the value is reset to a plain "zip" and is not useful.