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 contains (contains.U):
206 This variable holds the command to do a grep with a proper return
207 status. On most sane systems it is simply "grep". On insane systems
208 it is a grep followed by a cat followed by a test. This variable
209 is primarily for the use of other Configure units.
212 This variable is used internally by Configure to determine the
213 full pathname (if any) of the cp program. After Configure runs,
214 the value is reset to a plain "cp" and is not useful.
217 This variable is defined but not used by Configure.
218 The value is a plain '' and is not useful.
221 This variable is used internally by Configure to determine the
222 full pathname (if any) of the cpp program. After Configure runs,
223 the value is reset to a plain "cpp" and is not useful.
225 cpp_stuff (cpp_stuff.U):
226 This variable contains an identification of the catenation mechanism
227 used by the C preprocessor.
229 cppccsymbols (Cppsym.U):
230 The variable contains the symbols defined by the C compiler when
231 when it calls cpp. The symbols defined by the cc alone or cpp
232 alone are not in this list, see ccsymbols and cppsymbols.
233 The list is a space-separated list of symbol=value tokens.
235 cppflags (ccflags.U):
236 This variable holds the flags that will be passed to the C pre-
237 processor. It is up to the Makefile to use it.
239 cpplast (cppstdin.U):
240 This variable has the same functionality as cppminus, only it applies
241 to cpprun and not cppstdin.
243 cppminus (cppstdin.U):
244 This variable contains the second part of the string which will invoke
245 the C preprocessor on the standard input and produce to standard
246 output. This variable will have the value "-" if cppstdin needs
247 a minus to specify standard input, otherwise the value is "".
250 This variable contains the command which will invoke a C preprocessor
251 on standard input and put the output to stdout. It is guaranteed not
252 to be a wrapper and may be a null string if no preprocessor can be
253 made directly available. This preprocessor might be different from the
254 one used by the C compiler. Don't forget to append cpplast after the
255 preprocessor options.
257 cppstdin (cppstdin.U):
258 This variable contains the command which will invoke the C
259 preprocessor on standard input and put the output to stdout.
260 It is primarily used by other Configure units that ask about
261 preprocessor symbols.
263 cppsymbols (Cppsym.U):
264 The variable contains the symbols defined by the C preprocessor
265 alone. The symbols defined by cc or by cc when it calls cpp are
266 not in this list, see ccsymbols and cppccsymbols.
267 The list is a space-separated list of symbol=value tokens.
269 crosscompile (crosscompile.U):
270 This variable conditionally defines the CROSSCOMPILE symbol
271 which signifies that the build process is be a cross-compilation.
272 This is normally set by hints files or from Configure command line.
274 cryptlib (d_crypt.U):
275 This variable holds -lcrypt or the path to a libcrypt.a archive if
276 the crypt() function is not defined in the standard C library. It is
277 up to the Makefile to use this.
280 This variable is used internally by Configure to determine the
281 full pathname (if any) of the csh program. After Configure runs,
282 the value is reset to a plain "csh" and is not useful.
284 d_access (d_access.U):
285 This variable conditionally defines HAS_ACCESS if the access() system
286 call is available to check for access permissions using real IDs.
288 d_accessx (d_accessx.U):
289 This variable conditionally defines the HAS_ACCESSX symbol, which
290 indicates to the C program that the accessx() routine is available.
293 This variable conditionally defines the HAS_ALARM symbol, which
294 indicates to the C program that the alarm() routine is available.
296 d_archlib (archlib.U):
297 This variable conditionally defines ARCHLIB to hold the pathname
298 of architecture-dependent library files for $package. If
299 $archlib is the same as $privlib, then this is set to undef.
302 This variable conditionally defines the HAS_ATOLF symbol, which
303 indicates to the C program that the atolf() routine is available.
306 This variable conditionally defines the HAS_ATOLL symbol, which
307 indicates to the C program that the atoll() routine is available.
309 d_attribut (d_attribut.U):
310 This variable conditionally defines HASATTRIBUTE, which
311 indicates the C compiler can check for function attributes,
312 such as printf formats.
315 This variable conditionally defines the HAS_BCMP symbol if
316 the bcmp() routine is available to compare strings.
319 This variable conditionally defines the HAS_BCOPY symbol if
320 the bcopy() routine is available to copy strings.
322 d_bincompat5005 (bincompat5005.U):
323 This variable conditionally defines BINCOMPAT5005 so that embed.h
324 can take special action if Perl 5.006 should be binary-compatible
325 with Perl 5.005. This is impossible for builds that use features
326 like threads and multiplicity it is always $undef for those versions.
329 This symbol conditionally defines the symbol BSD when running on a
332 d_bsdgetpgrp (d_getpgrp.U):
333 This variable conditionally defines USE_BSD_GETPGRP if
334 getpgrp needs one arguments whereas USG one needs none.
336 d_bsdsetpgrp (d_setpgrp.U):
337 This variable conditionally defines USE_BSD_SETPGRP if
338 setpgrp needs two arguments whereas USG one needs none.
339 See also d_setpgid for a POSIX interface.
342 This variable conditionally defines the HAS_BZERO symbol if
343 the bzero() routine is available to set memory to 0.
345 d_casti32 (d_casti32.U):
346 This variable conditionally defines CASTI32, which indicates
347 whether the C compiler can cast large floats to 32-bit ints.
349 d_castneg (d_castneg.U):
350 This variable conditionally defines CASTNEG, which indicates
351 wether the C compiler can cast negative float to unsigned.
353 d_charvspr (d_vprintf.U):
354 This variable conditionally defines CHARVSPRINTF if this system
355 has vsprintf returning type (char*). The trend seems to be to
356 declare it as "int vsprintf()".
359 This variable conditionally defines the HAS_CHOWN symbol, which
360 indicates to the C program that the chown() routine is available.
362 d_chroot (d_chroot.U):
363 This variable conditionally defines the HAS_CHROOT symbol, which
364 indicates to the C program that the chroot() routine is available.
366 d_chsize (d_chsize.U):
367 This variable conditionally defines the CHSIZE symbol, which
368 indicates to the C program that the chsize() routine is available
369 to truncate files. You might need a -lx to get this routine.
371 d_closedir (d_closedir.U):
372 This variable conditionally defines HAS_CLOSEDIR if closedir() is
375 d_cmsghdr_s (d_socket.U):
376 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
377 which indicates that the the struct cmsghdr is supported.
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_fseeko (d_fseeko.U):
538 This variable conditionally defines the HAS_FSEEKO symbol, which
539 indicates to the C program that the fseeko() routine is available.
541 d_fsetpos (d_fsetpos.U):
542 This variable conditionally defines HAS_FSETPOS if fsetpos() is
543 available to set the file position indicator.
545 d_fstatfs (d_statfs.U):
546 This variable conditionally defines the HAS_FSTATFS symbol, which
547 indicates to the C program that the fstatfs() routine is available.
549 d_fstatvfs (d_statvfs.U):
550 This variable conditionally defines the HAS_FSTATVFS symbol, which
551 indicates to the C program that the fstatvfs() routine is available.
553 d_ftello (d_ftello.U):
554 This variable conditionally defines the HAS_FTELLO symbol, which
555 indicates to the C program that the ftello() routine is available.
558 This variable conditionally defines the HAS_FTIME symbol, which indicates
559 that the ftime() routine exists. The ftime() routine is basically
560 a sub-second accuracy clock.
562 d_Gconvert (d_gconvert.U):
563 This variable holds what Gconvert is defined as to convert
564 floating point numbers into strings. It could be 'gconvert'
565 or a more complex macro emulating gconvert with gcvt() or sprintf.
567 d_Gconvert='gconvert((x),(n),(t),(b))'
568 d_Gconvert='gcvt((x),(n),(b))'
569 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
571 d_getgrent (d_getgrent.U):
572 This variable conditionally defines the HAS_GETGRENT symbol, which
573 indicates to the C program that the getgrent() routine is available
574 for sequential access of the group database.
576 d_getgrps (d_getgrps.U):
577 This variable conditionally defines the HAS_GETGROUPS symbol, which
578 indicates to the C program that the getgroups() routine is available
579 to get the list of process groups.
581 d_gethbyaddr (d_gethbyad.U):
582 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
583 indicates to the C program that the gethostbyaddr() routine is available
584 to look up hosts by their IP addresses.
586 d_gethbyname (d_gethbynm.U):
587 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
588 indicates to the C program that the gethostbyname() routine is available
589 to look up host names in some data base or other.
591 d_gethent (d_gethent.U):
592 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
593 available to look up host names in some data base or another.
595 d_gethname (d_gethname.U):
596 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
597 indicates to the C program that the gethostname() routine may be
598 used to derive the host name.
600 d_gethostprotos (d_gethostprotos.U):
601 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
602 which indicates to the C program that <netdb.h> supplies
603 prototypes for the various gethost*() functions.
604 See also netdbtype.U for probing for various netdb types.
606 d_getlogin (d_getlogin.U):
607 This variable conditionally defines the HAS_GETLOGIN symbol, which
608 indicates to the C program that the getlogin() routine is available
609 to get the login name.
611 d_getmnt (d_getmnt.U):
612 This variable conditionally defines the HAS_GETMNT symbol, which
613 indicates to the C program that the getmnt() routine is available
614 to retrieve one or more mount info blocks by filename.
616 d_getmntent (d_getmntent.U):
617 This variable conditionally defines the HAS_GETMNTENT symbol, which
618 indicates to the C program that the getmntent() routine is available
619 to iterate through mounted files to get their mount info.
621 d_getnbyaddr (d_getnbyad.U):
622 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
623 indicates to the C program that the getnetbyaddr() routine is available
624 to look up networks by their IP addresses.
626 d_getnbyname (d_getnbynm.U):
627 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
628 indicates to the C program that the getnetbyname() routine is available
629 to look up networks by their names.
631 d_getnent (d_getnent.U):
632 This variable conditionally defines HAS_GETNETENT if getnetent() is
633 available to look up network names in some data base or another.
635 d_getnetprotos (d_getnetprotos.U):
636 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
637 which indicates to the C program that <netdb.h> supplies
638 prototypes for the various getnet*() functions.
639 See also netdbtype.U for probing for various netdb types.
641 d_getpbyname (d_getprotby.U):
642 This variable conditionally defines the HAS_GETPROTOBYNAME
643 symbol, which indicates to the C program that the
644 getprotobyname() routine is available to look up protocols
647 d_getpbynumber (d_getprotby.U):
648 This variable conditionally defines the HAS_GETPROTOBYNUMBER
649 symbol, which indicates to the C program that the
650 getprotobynumber() routine is available to look up protocols
653 d_getpent (d_getpent.U):
654 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
655 available to look up protocols in some data base or another.
657 d_getpgid (d_getpgid.U):
658 This variable conditionally defines the HAS_GETPGID symbol, which
659 indicates to the C program that the getpgid(pid) function
660 is available to get the process group id.
662 d_getpgrp2 (d_getpgrp2.U):
663 This variable conditionally defines the HAS_GETPGRP2 symbol, which
664 indicates to the C program that the getpgrp2() (as in DG/UX) routine
665 is available to get the current process group.
667 d_getpgrp (d_getpgrp.U):
668 This variable conditionally defines HAS_GETPGRP if getpgrp() is
669 available to get the current process group.
671 d_getppid (d_getppid.U):
672 This variable conditionally defines the HAS_GETPPID symbol, which
673 indicates to the C program that the getppid() routine is available
674 to get the parent process ID.
676 d_getprior (d_getprior.U):
677 This variable conditionally defines HAS_GETPRIORITY if getpriority()
678 is available to get a process's priority.
680 d_getprotoprotos (d_getprotoprotos.U):
681 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
682 which indicates to the C program that <netdb.h> supplies
683 prototypes for the various getproto*() functions.
684 See also netdbtype.U for probing for various netdb types.
686 d_getpwent (d_getpwent.U):
687 This variable conditionally defines the HAS_GETPWENT symbol, which
688 indicates to the C program that the getpwent() routine is available
689 for sequential access of the passwd database.
691 d_getsbyname (d_getsrvby.U):
692 This variable conditionally defines the HAS_GETSERVBYNAME
693 symbol, which indicates to the C program that the
694 getservbyname() routine is available to look up services
697 d_getsbyport (d_getsrvby.U):
698 This variable conditionally defines the HAS_GETSERVBYPORT
699 symbol, which indicates to the C program that the
700 getservbyport() routine is available to look up services
703 d_getsent (d_getsent.U):
704 This variable conditionally defines HAS_GETSERVENT if getservent() is
705 available to look up network services in some data base or another.
707 d_getservprotos (d_getservprotos.U):
708 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
709 which indicates to the C program that <netdb.h> supplies
710 prototypes for the various getserv*() functions.
711 See also netdbtype.U for probing for various netdb types.
713 d_getspent (d_getspent.U):
714 This variable conditionally defines HAS_GETSPENT if getspent() is
715 available to retrieve SysV shadow password entries sequentially.
717 d_getspnam (d_getspnam.U):
718 This variable conditionally defines HAS_GETSPNAM if getspnam() is
719 available to retrieve SysV shadow password entries by name.
721 d_gettimeod (d_ftime.U):
722 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
723 indicates that the gettimeofday() system call exists (to obtain a
724 sub-second accuracy clock). You should probably include <sys/resource.h>.
726 d_gnulibc (d_gnulibc.U):
727 Defined if we're dealing with the GNU C Library.
729 d_grpasswd (i_grp.U):
730 This variable conditionally defines GRPASSWD, which indicates
731 that struct group in <grp.h> contains gr_passwd.
733 d_hasmntopt (d_hasmntopt.U):
734 This variable conditionally defines the HAS_HASMNTOPT symbol, which
735 indicates to the C program that the hasmntopt() routine is available
736 to query the mount options of file systems.
739 This variable conditionally defines HAS_HTONL if htonl() and its
740 friends are available to do network order byte swapping.
742 d_index (d_strchr.U):
743 This variable conditionally defines HAS_INDEX if index() and
744 rindex() are available for string searching.
746 d_inetaton (d_inetaton.U):
747 This variable conditionally defines the HAS_INET_ATON symbol, which
748 indicates to the C program that the inet_aton() function is available
749 to parse IP address "dotted-quad" strings.
751 d_int64t (i_inttypes.U):
752 This symbol will be defined if the C compiler supports int64_t.
754 d_iovec_s (i_sysuio.U):
755 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
756 which indicates that the struct iovec is supported.
758 d_isascii (d_isascii.U):
759 This variable conditionally defines the HAS_ISASCII constant,
760 which indicates to the C program that isascii() is available.
762 d_killpg (d_killpg.U):
763 This variable conditionally defines the HAS_KILLPG symbol, which
764 indicates to the C program that the killpg() routine is available
765 to kill process groups.
767 d_lchown (d_lchown.U):
768 This variable conditionally defines the HAS_LCHOWN symbol, which
769 indicates to the C program that the lchown() routine is available
770 to operate on a symbolic link (instead of following the link).
772 d_ldbl_dig (d_ldbl_dig.U):
773 This variable conditionally defines d_ldbl_dig if this system's
774 header files provide LDBL_DIG, which is the number of significant
775 digits in a long double precision number.
778 This variable conditionally defines HAS_LINK if link() is
779 available to create hard links.
782 This variable conditionally defines the HAS_LLSEEK symbol, which
783 indicates to the C program that the llseek() routine is available.
785 d_locconv (d_locconv.U):
786 This variable conditionally defines HAS_LOCALECONV if localeconv() is
787 available for numeric and monetary formatting conventions.
790 This variable conditionally defines HAS_LOCKF if lockf() is
791 available to do file locking.
793 d_longdbl (d_longdbl.U):
794 This variable conditionally defines HAS_LONG_DOUBLE if
795 the long double type is supported.
797 d_longlong (d_longlong.U):
798 This variable conditionally defines HAS_LONG_LONG if
799 the long long type is supported.
802 This variable conditionally defines HAS_LSTAT if lstat() is
803 available to do file stats on symbolic links.
805 d_madvise (d_madvise.U):
806 This variable conditionally defines HAS_MADVISE if madvise() is
807 available to map a file into memory.
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 HAS_MMAP if mmap() is
864 available to map a file into memory.
866 d_mprotect (d_mprotect.U):
867 This variable conditionally defines HAS_MPROTECT if mprotect() is
868 available to modify the access protection of a memory mapped file.
871 This variable conditionally defines the HAS_MSG symbol, which
872 indicates that the entire msg*(2) library is present.
874 d_msg_ctrunc (d_socket.U):
875 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
876 which indicates that the MSG_CTRUNC is available. #ifdef is
877 not enough because it may be an enum, glibc has been known to do this.
879 d_msg_dontroute (d_socket.U):
880 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
881 which indicates that the MSG_DONTROUTE is available. #ifdef is
882 not enough because it may be an enum, glibc has been known to do this.
884 d_msg_oob (d_socket.U):
885 This variable conditionally defines the HAS_MSG_OOB symbol,
886 which indicates that the MSG_OOB is available. #ifdef is
887 not enough because it may be an enum, glibc has been known to do this.
889 d_msg_peek (d_socket.U):
890 This variable conditionally defines the HAS_MSG_PEEK symbol,
891 which indicates that the MSG_PEEK is available. #ifdef is
892 not enough because it may be an enum, glibc has been known to do this.
894 d_msg_proxy (d_socket.U):
895 This variable conditionally defines the HAS_MSG_PROXY symbol,
896 which indicates that the MSG_PROXY is available. #ifdef is
897 not enough because it may be an enum, glibc has been known to do this.
899 d_msgctl (d_msgctl.U):
900 This variable conditionally defines the HAS_MSGCTL symbol, which
901 indicates to the C program that the msgctl() routine is available.
903 d_msgget (d_msgget.U):
904 This variable conditionally defines the HAS_MSGGET symbol, which
905 indicates to the C program that the msgget() routine is available.
907 d_msghdr_s (d_socket.U):
908 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
909 which indicates that the struct msghdr is supported.
911 d_msgrcv (d_msgrcv.U):
912 This variable conditionally defines the HAS_MSGRCV symbol, which
913 indicates to the C program that the msgrcv() routine is available.
915 d_msgsnd (d_msgsnd.U):
916 This variable conditionally defines the HAS_MSGSND symbol, which
917 indicates to the C program that the msgsnd() routine is available.
920 This variable conditionally defines HAS_MSYNC if msync() is
921 available to synchronize a mapped file.
923 d_munmap (d_munmap.U):
924 This variable conditionally defines HAS_MUNMAP if munmap() is
925 available to unmap a region mapped by mmap().
927 d_mymalloc (mallocsrc.U):
928 This variable conditionally defines MYMALLOC in case other parts
929 of the source want to take special action if MYMALLOC is used.
930 This may include different sorts of profiling or error detection.
933 This variable conditionally defines the HAS_NICE symbol, which
934 indicates to the C program that the nice() routine is available.
937 This symbol will be defined if the C compiler supports off64_t.
939 d_old_pthread_create_joinable (d_pthrattrj.U):
940 This variable conditionally defines pthread_create_joinable.
941 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
943 d_oldpthreads (usethreads.U):
944 This variable conditionally defines the OLD_PTHREADS_API symbol,
945 and indicates that Perl should be built to use the old
946 draft POSIX threads API. This is only potentially meaningful if
949 d_oldsock (d_socket.U):
950 This variable conditionally defines the OLDSOCKET symbol, which
951 indicates that the BSD socket interface is based on 4.1c and not 4.2.
954 This variable conditionally defines the HAS_OPEN3 manifest constant,
955 which indicates to the C program that the 3 argument version of
956 the open(2) function is available.
958 d_pathconf (d_pathconf.U):
959 This variable conditionally defines the HAS_PATHCONF symbol, which
960 indicates to the C program that the pathconf() routine is available
961 to determine file-system related limits and options associated
962 with a given filename.
965 This variable conditionally defines the HAS_PAUSE symbol, which
966 indicates to the C program that the pause() routine is available
967 to suspend a process until a signal is received.
969 d_phostname (d_gethname.U):
970 This variable conditionally defines the HAS_PHOSTNAME symbol, which
971 contains the shell command which, when fed to popen(), may be
972 used to derive the host name.
975 This variable conditionally defines the HAS_PIPE symbol, which
976 indicates to the C program that the pipe() routine is available
977 to create an inter-process channel.
980 This variable conditionally defines the HAS_POLL symbol, which
981 indicates to the C program that the poll() routine is available
982 to poll active file descriptors.
984 d_portable (d_portable.U):
985 This variable conditionally defines the PORTABLE symbol, which
986 indicates to the C program that it should not assume that it is
987 running on the machine it was compiled on.
989 d_PRId64 (quadfio.U):
990 This variable conditionally defines the PERL_PRId64 symbol, which
991 indiciates that stdio has a symbol to print 64-bit decimal numbers.
993 d_PRIeldbl (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_PRIEldbl (longdblfio.U):
998 This variable conditionally defines the PERL_PRIfldlbl symbol, which
999 indiciates that stdio has a symbol to print long doubles.
1001 d_PRIfldbl (longdblfio.U):
1002 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1003 indiciates that stdio has a symbol to print long doubles.
1005 d_PRIFldbl (longdblfio.U):
1006 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1007 indiciates that stdio has a symbol to print long doubles.
1009 d_PRIgldbl (longdblfio.U):
1010 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1011 indiciates that stdio has a symbol to print long doubles.
1013 d_PRIGldbl (longdblfio.U):
1014 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1015 indiciates that stdio has a symbol to print long doubles.
1017 d_PRIi64 (quadfio.U):
1018 This variable conditionally defines the PERL_PRIi64 symbol, which
1019 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1021 d_PRIo64 (quadfio.U):
1022 This variable conditionally defines the PERL_PRIo64 symbol, which
1023 indiciates that stdio has a symbol to print 64-bit octal numbers.
1025 d_PRIu64 (quadfio.U):
1026 This variable conditionally defines the PERL_PRIu64 symbol, which
1027 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1030 d_PRIx64 (quadfio.U):
1031 This variable conditionally defines the PERL_PRIx64 symbol, which
1032 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1034 d_PRIX64 (quadfio.U):
1035 This variable conditionally defines the PERL_PRIX64 symbol, which
1036 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1038 d_pthread_yield (d_pthread_y.U):
1039 This variable conditionally defines the HAS_PTHREAD_YIELD
1040 symbol if the pthread_yield routine is available to yield
1041 the execution of the current thread.
1044 This variable conditionally defines PWAGE, which indicates
1045 that struct passwd contains pw_age.
1047 d_pwchange (i_pwd.U):
1048 This variable conditionally defines PWCHANGE, which indicates
1049 that struct passwd contains pw_change.
1051 d_pwclass (i_pwd.U):
1052 This variable conditionally defines PWCLASS, which indicates
1053 that struct passwd contains pw_class.
1055 d_pwcomment (i_pwd.U):
1056 This variable conditionally defines PWCOMMENT, which indicates
1057 that struct passwd contains pw_comment.
1059 d_pwexpire (i_pwd.U):
1060 This variable conditionally defines PWEXPIRE, which indicates
1061 that struct passwd contains pw_expire.
1063 d_pwgecos (i_pwd.U):
1064 This variable conditionally defines PWGECOS, which indicates
1065 that struct passwd contains pw_gecos.
1067 d_pwpasswd (i_pwd.U):
1068 This variable conditionally defines PWPASSWD, which indicates
1069 that struct passwd contains pw_passwd.
1071 d_pwquota (i_pwd.U):
1072 This variable conditionally defines PWQUOTA, which indicates
1073 that struct passwd contains pw_quota.
1075 d_readdir (d_readdir.U):
1076 This variable conditionally defines HAS_READDIR if readdir() is
1077 available to read directory entries.
1079 d_readlink (d_readlink.U):
1080 This variable conditionally defines the HAS_READLINK symbol, which
1081 indicates to the C program that the readlink() routine is available
1082 to read the value of a symbolic link.
1084 d_readv (d_readv.U):
1085 This variable conditionally defines the HAS_READV symbol, which
1086 indicates to the C program that the readv() routine is available.
1088 d_recvmsg (d_socket.U):
1089 This variable conditionally defines the HAS_RECVMSG symbol,
1090 which indicates that the recvmsg is supported.
1092 d_rename (d_rename.U):
1093 This variable conditionally defines the HAS_RENAME symbol, which
1094 indicates to the C program that the rename() routine is available
1097 d_rewinddir (d_readdir.U):
1098 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1101 d_rmdir (d_rmdir.U):
1102 This variable conditionally defines HAS_RMDIR if rmdir() is
1103 available to remove directories.
1105 d_safebcpy (d_safebcpy.U):
1106 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1107 the bcopy() routine can do overlapping copies.
1109 d_safemcpy (d_safemcpy.U):
1110 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1111 the memcpy() routine can do overlapping copies.
1113 d_sanemcmp (d_sanemcmp.U):
1114 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1115 the memcpy() routine is available and can be used to compare relative
1116 magnitudes of chars with their high bits set.
1118 d_sched_yield (d_pthread_y.U):
1119 This variable conditionally defines the HAS_SCHED_YIELD
1120 symbol if the sched_yield routine is available to yield
1121 the execution of the current thread.
1123 d_scm_rights (d_socket.U):
1124 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1125 which indicates that the SCM_RIGHTS is available. #ifdef is
1126 not enough because it may be an enum, glibc has been known to do this.
1128 d_seekdir (d_readdir.U):
1129 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1132 d_select (d_select.U):
1133 This variable conditionally defines HAS_SELECT if select() is
1134 available to select active file descriptors. A <sys/time.h>
1135 inclusion may be necessary for the timeout field.
1138 This variable conditionally defines the HAS_SEM symbol, which
1139 indicates that the entire sem*(2) library is present.
1141 d_semctl (d_semctl.U):
1142 This variable conditionally defines the HAS_SEMCTL symbol, which
1143 indicates to the C program that the semctl() routine is available.
1145 d_semctl_semid_ds (d_union_semun.U):
1146 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1147 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1149 d_semctl_semun (d_union_semun.U):
1150 This variable conditionally defines USE_SEMCTL_SEMUN, which
1151 indicates that union semun is to be used for semctl IPC_STAT.
1153 d_semget (d_semget.U):
1154 This variable conditionally defines the HAS_SEMGET symbol, which
1155 indicates to the C program that the semget() routine is available.
1157 d_semop (d_semop.U):
1158 This variable conditionally defines the HAS_SEMOP symbol, which
1159 indicates to the C program that the semop() routine is available.
1161 d_sendmsg (d_socket.U):
1162 This variable conditionally defines the HAS_SENDMSG symbol,
1163 which indicates that the sendmsg is supported.
1165 d_setegid (d_setegid.U):
1166 This variable conditionally defines the HAS_SETEGID symbol, which
1167 indicates to the C program that the setegid() routine is available
1168 to change the effective gid of the current program.
1170 d_seteuid (d_seteuid.U):
1171 This variable conditionally defines the HAS_SETEUID symbol, which
1172 indicates to the C program that the seteuid() routine is available
1173 to change the effective uid of the current program.
1175 d_setgrent (d_setgrent.U):
1176 This variable conditionally defines the HAS_SETGRENT symbol, which
1177 indicates to the C program that the setgrent() routine is available
1178 for initializing sequential access to the group database.
1180 d_setgrps (d_setgrps.U):
1181 This variable conditionally defines the HAS_SETGROUPS symbol, which
1182 indicates to the C program that the setgroups() routine is available
1183 to set the list of process groups.
1185 d_sethent (d_sethent.U):
1186 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1189 d_setlinebuf (d_setlnbuf.U):
1190 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1191 indicates to the C program that the setlinebuf() routine is available
1192 to change stderr or stdout from block-buffered or unbuffered to a
1195 d_setlocale (d_setlocale.U):
1196 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1197 available to handle locale-specific ctype implementations.
1199 d_setnent (d_setnent.U):
1200 This variable conditionally defines HAS_SETNETENT if setnetent() is
1203 d_setpent (d_setpent.U):
1204 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1207 d_setpgid (d_setpgid.U):
1208 This variable conditionally defines the HAS_SETPGID symbol if the
1209 setpgid(pid, gpid) function is available to set process group ID.
1211 d_setpgrp2 (d_setpgrp2.U):
1212 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1213 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1214 is available to set the current process group.
1216 d_setpgrp (d_setpgrp.U):
1217 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1218 available to set the current process group.
1220 d_setprior (d_setprior.U):
1221 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1222 is available to set a process's priority.
1224 d_setpwent (d_setpwent.U):
1225 This variable conditionally defines the HAS_SETPWENT symbol, which
1226 indicates to the C program that the setpwent() routine is available
1227 for initializing sequential access to the passwd database.
1229 d_setregid (d_setregid.U):
1230 This variable conditionally defines HAS_SETREGID if setregid() is
1231 available to change the real and effective gid of the current
1234 d_setresgid (d_setregid.U):
1235 This variable conditionally defines HAS_SETRESGID if setresgid() is
1236 available to change the real, effective and saved gid of the current
1239 d_setresuid (d_setreuid.U):
1240 This variable conditionally defines HAS_SETREUID if setresuid() is
1241 available to change the real, effective and saved uid of the current
1244 d_setreuid (d_setreuid.U):
1245 This variable conditionally defines HAS_SETREUID if setreuid() is
1246 available to change the real and effective uid of the current
1249 d_setrgid (d_setrgid.U):
1250 This variable conditionally defines the HAS_SETRGID symbol, which
1251 indicates to the C program that the setrgid() routine is available
1252 to change the real gid of the current program.
1254 d_setruid (d_setruid.U):
1255 This variable conditionally defines the HAS_SETRUID symbol, which
1256 indicates to the C program that the setruid() routine is available
1257 to change the real uid of the current program.
1259 d_setsent (d_setsent.U):
1260 This variable conditionally defines HAS_SETSERVENT if setservent() is
1263 d_setsid (d_setsid.U):
1264 This variable conditionally defines HAS_SETSID if setsid() is
1265 available to set the process group ID.
1267 d_setspent (d_setspent.U):
1268 This variable conditionally defines HAS_SETSPENT if setspent() is
1269 available to initialize the scan of SysV shadow password entries.
1271 d_setvbuf (d_setvbuf.U):
1272 This variable conditionally defines the HAS_SETVBUF symbol, which
1273 indicates to the C program that the setvbuf() routine is available
1274 to change buffering on an open stdio stream.
1277 This variable conditionally defines the USE_SFIO symbol,
1278 and indicates whether sfio is available (and should be used).
1281 This variable conditionally defines the HAS_SHM symbol, which
1282 indicates that the entire shm*(2) library is present.
1284 d_shmat (d_shmat.U):
1285 This variable conditionally defines the HAS_SHMAT symbol, which
1286 indicates to the C program that the shmat() routine is available.
1288 d_shmatprototype (d_shmat.U):
1289 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1290 symbol, which indicates that sys/shm.h has a prototype for
1293 d_shmctl (d_shmctl.U):
1294 This variable conditionally defines the HAS_SHMCTL symbol, which
1295 indicates to the C program that the shmctl() routine is available.
1297 d_shmdt (d_shmdt.U):
1298 This variable conditionally defines the HAS_SHMDT symbol, which
1299 indicates to the C program that the shmdt() routine is available.
1301 d_shmget (d_shmget.U):
1302 This variable conditionally defines the HAS_SHMGET symbol, which
1303 indicates to the C program that the shmget() routine is available.
1305 d_sigaction (d_sigaction.U):
1306 This variable conditionally defines the HAS_SIGACTION symbol, which
1307 indicates that the Vr4 sigaction() routine is available.
1309 d_sigsetjmp (d_sigsetjmp.U):
1310 This variable conditionally defines the HAS_SIGSETJMP symbol,
1311 which indicates that the sigsetjmp() routine is available to
1312 call setjmp() and optionally save the process's signal mask.
1314 d_socket (d_socket.U):
1315 This variable conditionally defines HAS_SOCKET, which indicates
1316 that the BSD socket interface is supported.
1318 d_sockpair (d_socket.U):
1319 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1320 indicates that the BSD socketpair() is supported.
1322 d_sqrtl (d_sqrtl.U):
1323 This variable conditionally defines the HAS_SQRTL symbol, which
1324 indicates to the C program that the sqrtl() routine is available.
1326 d_statblks (d_statblks.U):
1327 This variable conditionally defines USE_STAT_BLOCKS
1328 if this system has a stat structure declaring
1329 st_blksize and st_blocks.
1331 d_statfs (d_statfs.U):
1332 This variable conditionally defines the HAS_STATFS symbol, which
1333 indicates to the C program that the statfs() routine is available.
1335 d_statfsflags (d_statfs.U):
1336 This variable conditionally defines the HAS_STRUCT_STATFS_FLAGS
1337 symbol, which indicates to struct statfs from has f_flags member.
1338 This kind of struct statfs is coming from sys/mount.h (BSD),
1339 not from sys/statfs.h (SYSV).
1341 d_statvfs (d_statvfs.U):
1342 This variable conditionally defines the HAS_STATVFS symbol, which
1343 indicates to the C program that the statvfs() routine is available.
1345 d_stdio_cnt_lval (d_stdstdio.U):
1346 This variable conditionally defines STDIO_CNT_LVALUE if the
1347 FILE_cnt macro can be used as an lvalue.
1349 d_stdio_ptr_lval (d_stdstdio.U):
1350 This variable conditionally defines STDIO_PTR_LVALUE if the
1351 FILE_ptr macro can be used as an lvalue.
1353 d_stdio_stream_array (stdio_streams.U):
1354 This variable tells whether there is an array holding
1357 d_stdiobase (d_stdstdio.U):
1358 This variable conditionally defines USE_STDIO_BASE if this system
1359 has a FILE structure declaring a usable _base field (or equivalent)
1362 d_stdstdio (d_stdstdio.U):
1363 This variable conditionally defines USE_STDIO_PTR if this system
1364 has a FILE structure declaring usable _ptr and _cnt fields (or
1365 equivalent) in stdio.h.
1367 d_strchr (d_strchr.U):
1368 This variable conditionally defines HAS_STRCHR if strchr() and
1369 strrchr() are available for string searching.
1371 d_strcoll (d_strcoll.U):
1372 This variable conditionally defines HAS_STRCOLL if strcoll() is
1373 available to compare strings using collating information.
1375 d_strctcpy (d_strctcpy.U):
1376 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1377 indicates to the C program that this C compiler knows how to copy
1380 d_strerrm (d_strerror.U):
1381 This variable holds what Strerrr is defined as to translate an error
1382 code condition into an error message string. It could be 'strerror'
1383 or a more complex macro emulating strrror with sys_errlist[], or the
1384 "unknown" string when both strerror and sys_errlist are missing.
1386 d_strerror (d_strerror.U):
1387 This variable conditionally defines HAS_STRERROR if strerror() is
1388 available to translate error numbers to strings.
1390 d_strtod (d_strtod.U):
1391 This variable conditionally defines the HAS_STRTOD symbol, which
1392 indicates to the C program that the strtod() routine is available
1393 to provide better numeric string conversion than atof().
1395 d_strtol (d_strtol.U):
1396 This variable conditionally defines the HAS_STRTOL symbol, which
1397 indicates to the C program that the strtol() routine is available
1398 to provide better numeric string conversion than atoi() and friends.
1400 d_strtoul (d_strtoul.U):
1401 This variable conditionally defines the HAS_STRTOUL symbol, which
1402 indicates to the C program that the strtoul() routine is available
1403 to provide conversion of strings to unsigned long.
1405 d_strtoull (strtoull.U):
1406 This variable conditionally defines the HAS_STRTOULL symbol, which
1407 indicates to the C program that the strtoull() routine is available.
1409 d_strxfrm (d_strxfrm.U):
1410 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1411 available to transform strings.
1413 d_suidsafe (d_dosuid.U):
1414 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1415 if setuid scripts can be secure. This test looks in /dev/fd/.
1417 d_symlink (d_symlink.U):
1418 This variable conditionally defines the HAS_SYMLINK symbol, which
1419 indicates to the C program that the symlink() routine is available
1420 to create symbolic links.
1422 d_syscall (d_syscall.U):
1423 This variable conditionally defines HAS_SYSCALL if syscall() is
1424 available call arbitrary system calls.
1426 d_sysconf (d_sysconf.U):
1427 This variable conditionally defines the HAS_SYSCONF symbol, which
1428 indicates to the C program that the sysconf() routine is available
1429 to determine system related limits and options.
1431 d_sysernlst (d_strerror.U):
1432 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1433 is available to translate error numbers to the symbolic name.
1435 d_syserrlst (d_strerror.U):
1436 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1437 available to translate error numbers to strings.
1439 d_system (d_system.U):
1440 This variable conditionally defines HAS_SYSTEM if system() is
1441 available to issue a shell command.
1443 d_tcgetpgrp (d_tcgtpgrp.U):
1444 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1445 indicates to the C program that the tcgetpgrp() routine is available.
1446 to get foreground process group ID.
1448 d_tcsetpgrp (d_tcstpgrp.U):
1449 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1450 indicates to the C program that the tcsetpgrp() routine is available
1451 to set foreground process group ID.
1453 d_telldir (d_readdir.U):
1454 This variable conditionally defines HAS_TELLDIR if telldir() is
1457 d_telldirproto (d_telldirproto.U):
1458 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1459 which indicates to the C program that the system provides
1460 a prototype for the telldir() function. Otherwise, it is
1461 up to the program to supply one.
1464 This variable conditionally defines the HAS_TIME symbol, which indicates
1465 that the time() routine exists. The time() routine is normaly
1466 provided on UNIX systems.
1468 d_times (d_times.U):
1469 This variable conditionally defines the HAS_TIMES symbol, which indicates
1470 that the times() routine exists. The times() routine is normaly
1471 provided on UNIX systems. You may have to include <sys/times.h>.
1473 d_truncate (d_truncate.U):
1474 This variable conditionally defines HAS_TRUNCATE if truncate() is
1475 available to truncate files.
1477 d_tzname (d_tzname.U):
1478 This variable conditionally defines HAS_TZNAME if tzname[] is
1479 available to access timezone names.
1481 d_umask (d_umask.U):
1482 This variable conditionally defines the HAS_UMASK symbol, which
1483 indicates to the C program that the umask() routine is available.
1484 to set and get the value of the file creation mask.
1486 d_uname (d_gethname.U):
1487 This variable conditionally defines the HAS_UNAME symbol, which
1488 indicates to the C program that the uname() routine may be
1489 used to derive the host name.
1491 d_union_semun (d_union_semun.U):
1492 This variable conditionally defines HAS_UNION_SEMUN if the
1493 union semun is defined by including <sys/sem.h>.
1495 d_vendorbin (vendorbin.U):
1496 This variable conditionally defines PERL_VENDORBIN.
1498 d_vendorlib (vendorlib.U):
1499 This variable conditionally defines PERL_VENDORLIB.
1501 d_vfork (d_vfork.U):
1502 This variable conditionally defines the HAS_VFORK symbol, which
1503 indicates the vfork() routine is available.
1505 d_void_closedir (d_closedir.U):
1506 This variable conditionally defines VOID_CLOSEDIR if closedir()
1507 does not return a value.
1509 d_voidsig (d_voidsig.U):
1510 This variable conditionally defines VOIDSIG if this system
1511 declares "void (*signal(...))()" in signal.h. The old way was to
1512 declare it as "int (*signal(...))()".
1514 d_voidtty (i_sysioctl.U):
1515 This variable conditionally defines USE_IOCNOTTY to indicate that the
1516 ioctl() call with TIOCNOTTY should be used to void tty association.
1517 Otherwise (on USG probably), it is enough to close the standard file
1518 decriptors and do a setpgrp().
1520 d_volatile (d_volatile.U):
1521 This variable conditionally defines the HASVOLATILE symbol, which
1522 indicates to the C program that this C compiler knows about the
1523 volatile declaration.
1525 d_vprintf (d_vprintf.U):
1526 This variable conditionally defines the HAS_VPRINTF symbol, which
1527 indicates to the C program that the vprintf() routine is available
1528 to printf with a pointer to an argument list.
1530 d_wait4 (d_wait4.U):
1531 This variable conditionally defines the HAS_WAIT4 symbol, which
1532 indicates the wait4() routine is available.
1534 d_waitpid (d_waitpid.U):
1535 This variable conditionally defines HAS_WAITPID if waitpid() is
1536 available to wait for child process.
1538 d_wcstombs (d_wcstombs.U):
1539 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1540 indicates to the C program that the wcstombs() routine is available
1541 to convert wide character strings to multibyte strings.
1543 d_wctomb (d_wctomb.U):
1544 This variable conditionally defines the HAS_WCTOMB symbol, which
1545 indicates to the C program that the wctomb() routine is available
1546 to convert a wide character to a multibyte.
1548 d_writev (d_writev.U):
1549 This variable conditionally defines the HAS_WRITEV symbol, which
1550 indicates to the C program that the writev() routine is available.
1553 This variable conditionally defines the symbol XENIX, which alerts
1554 the C program that it runs under Xenix.
1557 This variable is used internally by Configure to determine the
1558 full pathname (if any) of the date program. After Configure runs,
1559 the value is reset to a plain "date" and is not useful.
1561 db_hashtype (i_db.U):
1562 This variable contains the type of the hash structure element
1563 in the <db.h> header file. In older versions of DB, it was
1564 int, while in newer ones it is u_int32_t.
1566 db_prefixtype (i_db.U):
1567 This variable contains the type of the prefix structure element
1568 in the <db.h> header file. In older versions of DB, it was
1569 int, while in newer ones it is size_t.
1571 defvoidused (voidflags.U):
1572 This variable contains the default value of the VOIDUSED symbol (15).
1574 direntrytype (i_dirent.U):
1575 This symbol is set to 'struct direct' or 'struct dirent' depending on
1576 whether dirent is available or not. You should use this pseudo type to
1577 portably declare your directory entries.
1580 This variable contains the extension that is to be used for the
1581 dynamically loaded modules that perl generaties.
1584 This variable contains the name of the dynamic loading file that
1585 will be used with the package.
1587 doublesize (doublesize.U):
1588 This variable contains the value of the DOUBLESIZE symbol, which
1589 indicates to the C program how many bytes there are in a double.
1591 drand01 (randfunc.U):
1592 Indicates the macro to be used to generate normalized
1593 random numbers. Uses randfunc, often divided by
1594 (double) (((unsigned long) 1 << randbits)) in order to
1595 normalize the result.
1596 In C programs, the macro 'Drand01' is mapped to drand01.
1598 dynamic_ext (Extensions.U):
1599 This variable holds a list of XS extension files we want to
1600 link dynamically into the package. It is used by Makefile.
1602 eagain (nblock_io.U):
1603 This variable bears the symbolic errno code set by read() when no
1604 data is present on the file and non-blocking I/O was enabled (otherwise,
1605 read() blocks naturally).
1608 This variable conditionally defines EBCDIC if this
1609 system uses EBCDIC encoding. Among other things, this
1610 means that the character ranges are not contiguous.
1614 This variable is used internally by Configure to determine the
1615 full pathname (if any) of the echo program. After Configure runs,
1616 the value is reset to a plain "echo" and is not useful.
1619 This variable is used internally by Configure to determine the
1620 full pathname (if any) of the egrep program. After Configure runs,
1621 the value is reset to a plain "egrep" and is not useful.
1624 This variable is defined but not used by Configure.
1625 The value is a plain '' and is not useful.
1628 When running under Eunice this variable contains a command which will
1629 convert a shell script to the proper form of text file for it to be
1630 executable by the shell. On other systems it is a no-op.
1633 This is an old synonym for _exe.
1636 This variable is used internally by Configure to determine the
1637 full pathname (if any) of the expr program. After Configure runs,
1638 the value is reset to a plain "expr" and is not useful.
1640 extensions (Extensions.U):
1641 This variable holds a list of all extension files (both XS and
1642 non-xs linked into the package. It is propagated to Config.pm
1643 and is typically used to test whether a particular extesion
1646 fflushall (fflushall.U):
1647 This symbol, if defined, tells that to flush
1648 all pending stdio output one must loop through all
1649 the stdio file handles stored in an array and fflush them.
1650 Note that if fflushNULL is defined, fflushall will not
1651 even be probed for and will be left undefined.
1653 fflushNULL (fflushall.U):
1654 This symbol, if defined, tells that fflush(NULL) does flush
1655 all pending stdio output.
1658 This variable is defined but not used by Configure.
1659 The value is a plain '' and is not useful.
1661 firstmakefile (Unix.U):
1662 This variable defines the first file searched by make. On unix,
1663 it is makefile (then Makefile). On case-insensitive systems,
1664 it might be something else. This is only used to deal with
1665 convoluted make depend tricks.
1668 This variable is defined but not used by Configure.
1669 The value is a plain '' and is not useful.
1671 fpostype (fpostype.U):
1672 This variable defines Fpos_t to be something like fpost_t, long,
1673 uint, or whatever type is used to declare file positions in libc.
1675 freetype (mallocsrc.U):
1676 This variable contains the return type of free(). It is usually
1677 void, but occasionally int.
1680 This variable contains the full pathname to 'ar', whether or
1681 not the user has specified 'portability'. This is only used
1685 This variable contains the full pathname to 'csh', whether or
1686 not the user has specified 'portability'. This is only used
1687 in the compiled C program, and we assume that all systems which
1688 can share this executable will have the same full pathname to
1691 full_sed (Loc_sed.U):
1692 This variable contains the full pathname to 'sed', whether or
1693 not the user has specified 'portability'. This is only used
1694 in the compiled C program, and we assume that all systems which
1695 can share this executable will have the same full pathname to
1699 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1700 indicate whether the compiler is version 1 or 2. This is used in
1701 setting some of the default cflags. It is set to '' if not gcc.
1703 gidtype (gidtype.U):
1704 This variable defines Gid_t to be something like gid_t, int,
1705 ushort, or whatever type is used to declare the return type
1706 of getgid(). Typically, it is the type of group ids in the kernel.
1709 This variable holds the general path (space-separated) used to
1710 find libraries. It may contain directories that do not exist on
1711 this platform, libpth is the cleaned-up version.
1714 This variable is used internally by Configure to determine the
1715 full pathname (if any) of the grep program. After Configure runs,
1716 the value is reset to a plain "grep" and is not useful.
1719 This variable contains a command that produces the text of the
1720 /etc/group file. This is normally "cat /etc/group", but can be
1721 "ypcat group" when NIS is used.
1723 groupstype (groupstype.U):
1724 This variable defines Groups_t to be something like gid_t, int,
1725 ushort, or whatever type is used for the second argument to
1726 getgroups() and setgroups(). Usually, this is the same as
1727 gidtype (gid_t), but sometimes it isn't.
1730 This variable is used internally by Configure to determine the
1731 full pathname (if any) of the gzip program. After Configure runs,
1732 the value is reset to a plain "gzip" and is not useful.
1734 h_fcntl (h_fcntl.U):
1735 This is variable gets set in various places to tell i_fcntl that
1736 <fcntl.h> should be included.
1738 h_sysfile (h_sysfile.U):
1739 This is variable gets set in various places to tell i_sys_file that
1740 <sys/file.h> should be included.
1743 Gives the type of hints used for previous answers. May be one of
1744 "default", "recommended" or "previous".
1747 This variable contains a command that produces the text of the
1748 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1749 "ypcat hosts" when NIS is used.
1752 This variable contains a flag which will tell the C compiler and loader
1753 to produce a program running with a huge memory model. If the
1754 huge model is not supported, contains the flag to produce large
1755 model programs. It is up to the Makefile to use this.
1757 i_arpainet (i_arpainet.U):
1758 This variable conditionally defines the I_ARPA_INET symbol,
1759 and indicates whether a C program should include <arpa/inet.h>.
1761 i_bsdioctl (i_sysioctl.U):
1762 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1763 indicates to the C program that <sys/bsdioctl.h> exists and should
1767 This variable conditionally defines the I_DB symbol, and indicates
1768 whether a C program may include Berkeley's DB include file <db.h>.
1771 This variable conditionally defines the I_DBM symbol, which
1772 indicates to the C program that <dbm.h> exists and should
1775 i_dirent (i_dirent.U):
1776 This variable conditionally defines I_DIRENT, which indicates
1777 to the C program that it should include <dirent.h>.
1780 This variable conditionally defines the I_DLD symbol, which
1781 indicates to the C program that <dld.h> (GNU dynamic loading)
1782 exists and should be included.
1784 i_dlfcn (i_dlfcn.U):
1785 This variable conditionally defines the I_DLFCN symbol, which
1786 indicates to the C program that <dlfcn.h> exists and should
1789 i_fcntl (i_fcntl.U):
1790 This variable controls the value of I_FCNTL (which tells
1791 the C program to include <fcntl.h>).
1793 i_float (i_float.U):
1794 This variable conditionally defines the I_FLOAT symbol, and indicates
1795 whether a C program may include <float.h> to get symbols like DBL_MAX
1796 or DBL_MIN, i.e. machine dependent floating point values.
1799 This variable conditionally defines the I_GDBM symbol, which
1800 indicates to the C program that <gdbm.h> exists and should
1804 This variable conditionally defines the I_GRP symbol, and indicates
1805 whether a C program should include <grp.h>.
1807 i_inttypes (i_inttypes.U):
1808 This variable conditionally defines the I_INTTYPES symbol,
1809 and indicates whether a C program should include <inttypes.h>.
1811 i_limits (i_limits.U):
1812 This variable conditionally defines the I_LIMITS symbol, and indicates
1813 whether a C program may include <limits.h> to get symbols like WORD_BIT
1816 i_locale (i_locale.U):
1817 This variable conditionally defines the I_LOCALE symbol,
1818 and indicates whether a C program should include <locale.h>.
1820 i_machcthr (i_machcthr.U):
1821 This variable conditionally defines the I_MACH_CTHREADS symbol,
1822 and indicates whether a C program should include <mach/cthreads.h>.
1824 i_malloc (i_malloc.U):
1825 This variable conditionally defines the I_MALLOC symbol, and indicates
1826 whether a C program should include <malloc.h>.
1829 This variable conditionally defines the I_MATH symbol, and indicates
1830 whether a C program may include <math.h>.
1832 i_memory (i_memory.U):
1833 This variable conditionally defines the I_MEMORY symbol, and indicates
1834 whether a C program should include <memory.h>.
1836 i_mntent (i_mntent.U):
1837 This variable conditionally defines the I_MNTENT symbol, and indicates
1838 whether a C program should include <mntent.h>.
1841 This variable conditionally defines the I_NDBM symbol, which
1842 indicates to the C program that <ndbm.h> exists and should
1845 i_netdb (i_netdb.U):
1846 This variable conditionally defines the I_NETDB symbol, and indicates
1847 whether a C program should include <netdb.h>.
1849 i_neterrno (i_neterrno.U):
1850 This variable conditionally defines the I_NET_ERRNO symbol, which
1851 indicates to the C program that <net/errno.h> exists and should
1854 i_netinettcp (i_netinettcp.U):
1855 This variable conditionally defines the I_NETINET_TCP symbol,
1856 and indicates whether a C program should include <netinet/tcp.h>.
1859 This variable conditionally defines I_NETINET_IN, which indicates
1860 to the C program that it should include <netinet/in.h>. Otherwise,
1861 you may try <sys/in.h>.
1864 This variable conditionally defines the I_POLL symbol, and indicates
1865 whether a C program should include <poll.h>.
1867 i_pthread (i_pthread.U):
1868 This variable conditionally defines the I_PTHREAD symbol,
1869 and indicates whether a C program should include <pthread.h>.
1872 This variable conditionally defines I_PWD, which indicates
1873 to the C program that it should include <pwd.h>.
1875 i_rpcsvcdbm (i_dbm.U):
1876 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1877 indicates to the C program that <rpcsvc/dbm.h> exists and should
1878 be included. Some System V systems might need this instead of <dbm.h>.
1881 This variable conditionally defines the I_SFIO symbol,
1882 and indicates whether a C program should include <sfio.h>.
1884 i_sgtty (i_termio.U):
1885 This variable conditionally defines the I_SGTTY symbol, which
1886 indicates to the C program that it should include <sgtty.h> rather
1889 i_shadow (i_shadow.U):
1890 This variable conditionally defines the I_SHADOW symbol, and indicates
1891 whether a C program should include <shadow.h>.
1893 i_socks (i_socks.U):
1894 This variable conditionally defines the I_SOCKS symbol, and indicates
1895 whether a C program should include <socks.h>.
1897 i_stdarg (i_varhdr.U):
1898 This variable conditionally defines the I_STDARG symbol, which
1899 indicates to the C program that <stdarg.h> exists and should
1902 i_stddef (i_stddef.U):
1903 This variable conditionally defines the I_STDDEF symbol, which
1904 indicates to the C program that <stddef.h> exists and should
1907 i_stdlib (i_stdlib.U):
1908 This variable conditionally defines the I_STDLIB symbol, which
1909 indicates to the C program that <stdlib.h> exists and should
1912 i_string (i_string.U):
1913 This variable conditionally defines the I_STRING symbol, which
1914 indicates that <string.h> should be included rather than <strings.h>.
1916 i_sysaccess (i_sysaccess.U):
1917 This variable conditionally defines the I_SYS_ACCESS symbol,
1918 and indicates whether a C program should include <sys/access.h>.
1920 i_sysdir (i_sysdir.U):
1921 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1922 whether a C program should include <sys/dir.h>.
1924 i_sysfile (i_sysfile.U):
1925 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1926 whether a C program should include <sys/file.h> to get R_OK and friends.
1928 i_sysfilio (i_sysioctl.U):
1929 This variable conditionally defines the I_SYS_FILIO symbol, which
1930 indicates to the C program that <sys/filio.h> exists and should
1931 be included in preference to <sys/ioctl.h>.
1934 This variable conditionally defines I_SYS_IN, which indicates
1935 to the C program that it should include <sys/in.h> instead of
1938 i_sysioctl (i_sysioctl.U):
1939 This variable conditionally defines the I_SYS_IOCTL symbol, which
1940 indicates to the C program that <sys/ioctl.h> exists and should
1943 i_sysmman (i_sysmman.U):
1944 This variable conditionally defines the I_SYS_MMAN symbol, and
1945 indicates whether a C program should include <sys/mman.h>.
1947 i_sysmount (i_sysmount.U):
1948 This variable conditionally defines the I_SYSMOUNT symbol,
1949 and indicates whether a C program should include <sys/mount.h>.
1951 i_sysndir (i_sysndir.U):
1952 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1953 whether a C program should include <sys/ndir.h>.
1955 i_sysparam (i_sysparam.U):
1956 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1957 whether a C program should include <sys/param.h>.
1959 i_sysresrc (i_sysresrc.U):
1960 This variable conditionally defines the I_SYS_RESOURCE symbol,
1961 and indicates whether a C program should include <sys/resource.h>.
1963 i_syssecrt (i_syssecrt.U):
1964 This variable conditionally defines the I_SYS_SECURITY symbol,
1965 and indicates whether a C program should include <sys/security.h>.
1967 i_sysselct (i_sysselct.U):
1968 This variable conditionally defines I_SYS_SELECT, which indicates
1969 to the C program that it should include <sys/select.h> in order to
1970 get the definition of struct timeval.
1972 i_syssockio (i_sysioctl.U):
1973 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1974 C program that socket ioctl codes may be found in <sys/sockio.h>
1975 instead of <sys/ioctl.h>.
1977 i_sysstat (i_sysstat.U):
1978 This variable conditionally defines the I_SYS_STAT symbol,
1979 and indicates whether a C program should include <sys/stat.h>.
1981 i_sysstatvfs (i_sysstatvfs.U):
1982 This variable conditionally defines the I_SYSSTATVFS symbol,
1983 and indicates whether a C program should include <sys/statvfs.h>.
1985 i_systime (i_time.U):
1986 This variable conditionally defines I_SYS_TIME, which indicates
1987 to the C program that it should include <sys/time.h>.
1989 i_systimek (i_time.U):
1990 This variable conditionally defines I_SYS_TIME_KERNEL, which
1991 indicates to the C program that it should include <sys/time.h>
1992 with KERNEL defined.
1994 i_systimes (i_systimes.U):
1995 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1996 whether a C program should include <sys/times.h>.
1998 i_systypes (i_systypes.U):
1999 This variable conditionally defines the I_SYS_TYPES symbol,
2000 and indicates whether a C program should include <sys/types.h>.
2002 i_sysuio (i_sysuio.U):
2003 This variable conditionally defines the I_SYSUIO symbol, and indicates
2004 whether a C program should include <sys/uio.h>.
2006 i_sysun (i_sysun.U):
2007 This variable conditionally defines I_SYS_UN, which indicates
2008 to the C program that it should include <sys/un.h> to get UNIX
2009 domain socket definitions.
2011 i_syswait (i_syswait.U):
2012 This variable conditionally defines I_SYS_WAIT, which indicates
2013 to the C program that it should include <sys/wait.h>.
2015 i_termio (i_termio.U):
2016 This variable conditionally defines the I_TERMIO symbol, which
2017 indicates to the C program that it should include <termio.h> rather
2020 i_termios (i_termio.U):
2021 This variable conditionally defines the I_TERMIOS symbol, which
2022 indicates to the C program that the POSIX <termios.h> file is
2026 This variable conditionally defines I_TIME, which indicates
2027 to the C program that it should include <time.h>.
2029 i_unistd (i_unistd.U):
2030 This variable conditionally defines the I_UNISTD symbol, and indicates
2031 whether a C program should include <unistd.h>.
2033 i_utime (i_utime.U):
2034 This variable conditionally defines the I_UTIME symbol, and indicates
2035 whether a C program should include <utime.h>.
2037 i_values (i_values.U):
2038 This variable conditionally defines the I_VALUES symbol, and indicates
2039 whether a C program may include <values.h> to get symbols like MAXLONG
2042 i_varargs (i_varhdr.U):
2043 This variable conditionally defines I_VARARGS, which indicates
2044 to the C program that it should include <varargs.h>.
2046 i_varhdr (i_varhdr.U):
2047 Contains the name of the header to be included to get va_dcl definition.
2048 Typically one of varargs.h or stdarg.h.
2050 i_vfork (i_vfork.U):
2051 This variable conditionally defines the I_VFORK symbol, and indicates
2052 whether a C program should include vfork.h.
2054 ignore_versioned_solibs (libs.U):
2055 This variable should be non-empty if non-versioned shared
2056 libraries (libfoo.so.x.y) are to be ignored (because they
2057 cannot be linked against).
2060 This variable must preceed the normal include path to get hte
2061 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2062 Value can be "" or "/bsd43" on mips.
2065 This variable is defined but not used by Configure.
2066 The value is a plain '' and is not useful.
2068 installarchlib (archlib.U):
2069 This variable is really the same as archlibexp but may differ on
2070 those systems using AFS. For extra portability, only this variable
2071 should be used in makefiles.
2074 This variable is the same as binexp unless AFS is running in which case
2075 the user is explicitely prompted for it. This variable should always
2076 be used in your makefiles for maximum portability.
2078 installman1dir (man1dir.U):
2079 This variable is really the same as man1direxp, unless you are using
2080 AFS in which case it points to the read/write location whereas
2081 man1direxp only points to the read-only access location. For extra
2082 portability, you should only use this variable within your makefiles.
2084 installman3dir (man3dir.U):
2085 This variable is really the same as man3direxp, unless you are using
2086 AFS in which case it points to the read/write location whereas
2087 man3direxp only points to the read-only access location. For extra
2088 portability, you should only use this variable within your makefiles.
2090 installprefix (installprefix.U):
2091 This variable holds the name of the directory below which
2092 "make install" will install the package. For most users, this
2093 is the same as prefix. However, it is useful for
2094 installing the software into a different (usually temporary)
2095 location after which it can be bundled up and moved somehow
2096 to the final location specified by prefix.
2098 installprefixexp (installprefix.U):
2099 This variable holds the full absolute path of installprefix
2100 with all ~-expansion done.
2102 installprivlib (privlib.U):
2103 This variable is really the same as privlibexp but may differ on
2104 those systems using AFS. For extra portability, only this variable
2105 should be used in makefiles.
2107 installscript (scriptdir.U):
2108 This variable is usually the same as scriptdirexp, unless you are on
2109 a system running AFS, in which case they may differ slightly. You
2110 should always use this variable within your makefiles for portability.
2112 installsitearch (sitearch.U):
2113 This variable is really the same as sitearchexp but may differ on
2114 those systems using AFS. For extra portability, only this variable
2115 should be used in makefiles.
2117 installsitebin (sitebin.U):
2118 This variable is usually the same as sitebinexp, unless you are on
2119 a system running AFS, in which case they may differ slightly. You
2120 should always use this variable within your makefiles for portability.
2122 installsitelib (sitelib.U):
2123 This variable is really the same as sitelibexp but may differ on
2124 those systems using AFS. For extra portability, only this variable
2125 should be used in makefiles.
2127 installstyle (installstyle.U):
2128 This variable describes the "style" of the perl installation.
2129 This is intended to be useful for tools that need to
2130 manipulate entire perl distributions. Perl itself doesn't use
2131 this to find its libraries -- the library directories are
2132 stored directly in Config.pm. Currently, there are only two
2133 styles: "lib" and "lib/perl5". The default library locations
2134 (e.g. privlib, sitelib) are either $prefix/lib or
2135 $prefix/lib/perl5. The former is useful if $prefix is a
2136 directory dedicated to perl (e.g. /opt/perl), while the latter
2137 is useful if $prefix is shared by many packages, e.g. if
2139 This may later be extended to include other information, so
2140 be careful with pattern-matching on the results.
2141 For compatibility with perl5.005 and earlier, the default
2142 setting is based on whether or not $prefix contains the string
2145 installusrbinperl (instubperl.U):
2146 This variable tells whether Perl should be installed also as
2147 /usr/bin/perl in addition to
2150 installvendorbin (vendorbin.U):
2151 This variable is really the same as vendorbinexp but may differ on
2152 those systems using AFS. For extra portability, only this variable
2153 should be used in makefiles.
2155 installvendorlib (vendorlib.U):
2156 This variable is really the same as vendorlibexp but may differ on
2157 those systems using AFS. For extra portability, only this variable
2158 should be used in makefiles.
2160 intsize (intsize.U):
2161 This variable contains the value of the INTSIZE symbol, which
2162 indicates to the C program how many bytes there are in an int.
2164 known_extensions (Extensions.U):
2165 This variable holds a list of all XS extensions included in
2169 This variable is defined but not used by Configure.
2170 The value is a plain '' and is not useful.
2173 This variable contains a flag which will tell the C compiler and loader
2174 to produce a program running with a large memory model. It is up to
2175 the Makefile to use this.
2178 This variable indicates the program to be used to link
2179 libraries for dynamic loading. On some systems, it is 'ld'.
2180 On ELF systems, it should be $cc. Mostly, we'll try to respect
2181 the hint file setting.
2183 lddlflags (dlsrc.U):
2184 This variable contains any special flags that might need to be
2185 passed to $ld to create a shared library suitable for dynamic
2186 loading. It is up to the makefile to use it. For hpux, it
2187 should be '-b'. For sunos 4.1, it is empty.
2189 ldflags (ccflags.U):
2190 This variable contains any additional C loader flags desired by
2191 the user. It is up to the Makefile to use this.
2193 ldlibpthname (libperl.U):
2194 This variable holds the name of the shared library
2195 search path, often LD_LIBRARY_PATH. To get an empty
2196 string, the hints file must set this to 'none'.
2199 This variable is used internally by Configure to determine the
2200 full pathname (if any) of the less program. After Configure runs,
2201 the value is reset to a plain "less" and is not useful.
2204 This is an old synonym for _a.
2207 This variable contains the location of the C library.
2209 libperl (libperl.U):
2210 The perl executable is obtained by linking perlmain.c with
2211 libperl, any static extensions (usually just DynaLoader),
2212 and any other libraries needed on this system. libperl
2213 is usually libperl.a, but can also be libperl.so.xxx if
2214 the user wishes to build a perl executable with a shared
2218 This variable holds the general path (space-separated) used to find
2219 libraries. It is intended to be used by other units.
2222 This variable holds the additional libraries we want to use.
2223 It is up to the Makefile to deal with it.
2225 libswanted (Myinit.U):
2226 This variable holds a list of all the libraries we want to
2227 search. The order is chosen to pick up the c library
2228 ahead of ucb or bsd libraries for SVR4.
2231 This variable is defined but not used by Configure.
2232 The value is a plain '' and is not useful.
2235 This variable is defined but not used by Configure.
2236 The value is a plain '' and is not useful.
2238 lkflags (ccflags.U):
2239 This variable contains any additional C partial linker flags desired by
2240 the user. It is up to the Makefile to use this.
2243 This variable is used internally by Configure to determine the
2244 full pathname (if any) of the ln program. After Configure runs,
2245 the value is reset to a plain "ln" and is not useful.
2248 This variable holds the name of the command to make
2249 symbolic links (if they are supported). It can be used
2250 in the Makefile. It is either 'ln -s' or 'ln'
2252 locincpth (ccflags.U):
2253 This variable contains a list of additional directories to be
2254 searched by the compiler. The appropriate '-I' directives will
2255 be added to ccflags. This is intended to simplify setting
2256 local directories from the Configure command line.
2257 It's not much, but it parallels the loclibpth stuff in libpth.U.
2259 loclibpth (libpth.U):
2260 This variable holds the paths (space-separated) used to find local
2261 libraries. It is prepended to libpth, and is intended to be easily
2262 set from the command line.
2264 longdblsize (d_longdbl.U):
2265 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2266 indicates to the C program how many bytes there are in a long double,
2267 if this system supports long doubles.
2269 longlongsize (d_longlong.U):
2270 This variable contains the value of the LONGLONGSIZE symbol, which
2271 indicates to the C program how many bytes there are in a long long,
2272 if this system supports long long.
2274 longsize (intsize.U):
2275 This variable contains the value of the LONGSIZE symbol, which
2276 indicates to the C program how many bytes there are in a long.
2279 This variable is defined but not used by Configure.
2280 The value is a plain '' and is not useful.
2283 This variable is defined but not used by Configure.
2284 The value is a plain '' and is not useful.
2287 This variable is used internally by Configure to determine the
2288 full pathname (if any) of the ls program. After Configure runs,
2289 the value is reset to a plain "ls" and is not useful.
2291 lseeksize (lseektype.U):
2292 This variable defines lseektype to be something like off_t, long,
2293 or whatever type is used to declare lseek offset's type in the
2294 kernel (which also appears to be lseek's return type).
2296 lseektype (lseektype.U):
2297 This variable defines lseektype to be something like off_t, long,
2298 or whatever type is used to declare lseek offset's type in the
2299 kernel (which also appears to be lseek's return type).
2302 This variable is defined but not used by Configure.
2303 The value is a plain '' and is not useful.
2306 This variable is defined but not used by Configure.
2307 The value is a plain '' and is not useful.
2310 This variable is used internally by Configure to determine the
2311 full pathname (if any) of the make program. After Configure runs,
2312 the value is reset to a plain "make" and is not useful.
2314 make_set_make (make.U):
2315 Some versions of 'make' set the variable MAKE. Others do not.
2316 This variable contains the string to be included in Makefile.SH
2317 so that MAKE is set if needed, and not if not needed.
2318 Possible values are:
2319 make_set_make='#' # If your make program handles this for you,
2320 make_set_make="MAKE=$make" # if it doesn't.
2321 I used a comment character so that we can distinguish a
2322 'set' value (from a previous config.sh or Configure '-D' option)
2323 from an uncomputed value.
2325 mallocobj (mallocsrc.U):
2326 This variable contains the name of the malloc.o that this package
2327 generates, if that malloc.o is preferred over the system malloc.
2328 Otherwise the value is null. This variable is intended for generating
2329 Makefiles. See mallocsrc.
2331 mallocsrc (mallocsrc.U):
2332 This variable contains the name of the malloc.c that comes with
2333 the package, if that malloc.c is preferred over the system malloc.
2334 Otherwise the value is null. This variable is intended for generating
2337 malloctype (mallocsrc.U):
2338 This variable contains the kind of ptr returned by malloc and realloc.
2340 man1dir (man1dir.U):
2341 This variable contains the name of the directory in which manual
2342 source pages are to be put. It is the responsibility of the
2343 Makefile.SH to get the value of this into the proper command.
2344 You must be prepared to do the ~name expansion yourself.
2346 man1direxp (man1dir.U):
2347 This variable is the same as the man1dir variable, but is filename
2348 expanded at configuration time, for convenient use in makefiles.
2350 man1ext (man1dir.U):
2351 This variable contains the extension that the manual page should
2352 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2355 man3dir (man3dir.U):
2356 This variable contains the name of the directory in which manual
2357 source pages are to be put. It is the responsibility of the
2358 Makefile.SH to get the value of this into the proper command.
2359 You must be prepared to do the ~name expansion yourself.
2361 man3direxp (man3dir.U):
2362 This variable is the same as the man3dir variable, but is filename
2363 expanded at configuration time, for convenient use in makefiles.
2365 man3ext (man3dir.U):
2366 This variable contains the extension that the manual page should
2367 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2371 This variable is used internally by Configure to determine the
2372 full pathname (if any) of the Mcc program. After Configure runs,
2373 the value is reset to a plain "Mcc" and is not useful.
2376 This variable contains a flag which will tell the C compiler and loader
2377 to produce a program running with a medium memory model. If the
2378 medium model is not supported, contains the flag to produce large
2379 model programs. It is up to the Makefile to use this.
2381 mips_type (usrinc.U):
2382 This variable holds the environment type for the mips system.
2383 Possible values are "BSD 4.3" and "System V".
2386 This variable is used internally by Configure to determine the
2387 full pathname (if any) of the mkdir program. After Configure runs,
2388 the value is reset to a plain "mkdir" and is not useful.
2390 mmaptype (d_mmap.U):
2391 This symbol contains the type of pointer returned by mmap()
2392 (and simultaneously the type of the first argument).
2393 It can be 'void *' or 'caddr_t'.
2396 This variable contains the list of memory models supported by this
2397 system. Possible component values are none, split, unsplit, small,
2398 medium, large, and huge. The component values are space separated.
2400 modetype (modetype.U):
2401 This variable defines modetype to be something like mode_t,
2402 int, unsigned short, or whatever type is used to declare file
2403 modes for system calls.
2406 This variable is used internally by Configure to determine the
2407 full pathname (if any) of the more program. After Configure runs,
2408 the value is reset to a plain "more" and is not useful.
2410 multiarch (multiarch.U):
2411 This variable conditionally defines the MULTIARCH symbol
2412 which signifies the presence of multiplatform files.
2413 This is normally set by hints files.
2416 This variable is defined but not used by Configure.
2417 The value is a plain '' and is not useful.
2419 myarchname (archname.U):
2420 This variable holds the architecture name computed by Configure in
2421 a previous run. It is not intended to be perused by any user and
2422 should never be set in a hint file.
2424 mydomain (myhostname.U):
2425 This variable contains the eventual value of the MYDOMAIN symbol,
2426 which is the domain of the host the program is going to run on.
2427 The domain must be appended to myhostname to form a complete host name.
2428 The dot comes with mydomain, and need not be supplied by the program.
2430 myhostname (myhostname.U):
2431 This variable contains the eventual value of the MYHOSTNAME symbol,
2432 which is the name of the host the program is going to run on.
2433 The domain is not kept with hostname, but must be gotten from mydomain.
2434 The dot comes with mydomain, and need not be supplied by the program.
2436 myuname (Oldconfig.U):
2437 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2438 pseudo variables assignments in the output are stripped, thank you. The
2439 whole thing is then lower-cased.
2442 This variable contains the '-n' flag if that is what causes the echo
2443 command to suppress newline. Otherwise it is null. Correct usage is
2444 $echo $n "prompt for a question: $c".
2446 netdb_hlen_type (netdbtype.U):
2447 This variable holds the type used for the 2nd argument to
2448 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2449 This is only useful if you have gethostbyaddr(), naturally.
2451 netdb_host_type (netdbtype.U):
2452 This variable holds the type used for the 1st argument to
2453 gethostbyaddr(). Usually, this is char * or void *, possibly
2454 with or without a const prefix.
2455 This is only useful if you have gethostbyaddr(), naturally.
2457 netdb_name_type (netdbtype.U):
2458 This variable holds the type used for the argument to
2459 gethostbyname(). Usually, this is char * or const char *.
2460 This is only useful if you have gethostbyname(), naturally.
2462 netdb_net_type (netdbtype.U):
2463 This variable holds the type used for the 1st argument to
2464 getnetbyaddr(). Usually, this is int or long.
2465 This is only useful if you have getnetbyaddr(), naturally.
2468 This variable is used internally by Configure to determine the
2469 full pathname (if any) of the nm program. After Configure runs,
2470 the value is reset to a plain "nm" and is not useful.
2473 This variable holds the options that may be necessary for nm.
2475 nm_so_opt (usenm.U):
2476 This variable holds the options that may be necessary for nm
2477 to work on a shared library but that can not be used on an
2478 archive library. Currently, this is only used by Linux, where
2479 nm --dynamic is *required* to get symbols from an ELF library which
2480 has been stripped, but nm --dynamic is *fatal* on an archive library.
2481 Maybe Linux should just always set usenm=false.
2483 nonxs_ext (Extensions.U):
2484 This variable holds a list of all non-xs extensions included
2485 in the package. All of them will be built.
2488 This variable is used internally by Configure to determine the
2489 full pathname (if any) of the nroff program. After Configure runs,
2490 the value is reset to a plain "nroff" and is not useful.
2492 o_nonblock (nblock_io.U):
2493 This variable bears the symbol value to be used during open() or fcntl()
2494 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2495 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2496 but that is only supported by some devices.
2499 This is an old synonym for _o.
2501 old_pthread_create_joinable (d_pthrattrj.U):
2502 This variable defines the constant to use for creating joinable
2503 (aka undetached) pthreads. Unused if pthread.h defines
2504 PTHREAD_CREATE_JOINABLE. If used, possible values are
2505 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2507 optimize (ccflags.U):
2508 This variable contains any optimizer/debugger flag that should be used.
2509 It is up to the Makefile to use it.
2511 orderlib (orderlib.U):
2512 This variable is "true" if the components of libraries must be ordered
2513 (with `lorder $* | tsort`) before placing them in an archive. Set to
2514 "false" if ranlib or ar can generate random libraries.
2516 osname (Oldconfig.U):
2517 This variable contains the operating system name (e.g. sunos,
2518 solaris, hpux, etc.). It can be useful later on for setting
2519 defaults. Any spaces are replaced with underscores. It is set
2520 to a null string if we can't figure it out.
2522 osvers (Oldconfig.U):
2523 This variable contains the operating system version (e.g.
2524 4.1.3, 5.2, etc.). It is primarily used for helping select
2525 an appropriate hints file, but might be useful elsewhere for
2526 setting defaults. It is set to '' if we can't figure it out.
2527 We try to be flexible about how much of the version number
2528 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2529 same for this package, hints files might just be os_4.0 or
2530 os_4.1, etc., not keeping separate files for each little release.
2532 package (package.U):
2533 This variable contains the name of the package being constructed.
2534 It is primarily intended for the use of later Configure units.
2537 This variable contains the name of the preferred pager on the system.
2538 Usual values are (the full pathnames of) more, less, pg, or cat.
2541 This variable contains a command that produces the text of the
2542 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2543 "ypcat passwd" when NIS is used.
2545 patchlevel (patchlevel.U):
2546 The patchlevel level of this package.
2547 The value of patchlevel comes from the patchlevel.h file.
2550 This is an old synonym for p_ in Head.U, the character
2551 used to separate elements in the command shell search PATH.
2554 This variable is defined but not used by Configure.
2555 The value is a plain '' and is not useful.
2557 perladmin (perladmin.U):
2558 Electronic mail address of the perl5 administrator.
2560 perlpath (perlpath.U):
2561 This variable contains the eventual value of the PERLPATH symbol,
2562 which contains the name of the perl interpreter to be used in
2563 shell scripts and in the "eval 'exec'" idiom.
2566 This variable is used internally by Configure to determine the
2567 full pathname (if any) of the pg program. After Configure runs,
2568 the value is reset to a plain "pg" and is not useful.
2570 phostname (myhostname.U):
2571 This variable contains the eventual value of the PHOSTNAME symbol,
2572 which is a command that can be fed to popen() to get the host name.
2573 The program should probably not presume that the domain is or isn't
2576 pidtype (pidtype.U):
2577 This variable defines PIDTYPE to be something like pid_t, int,
2578 ushort, or whatever type is used to declare process ids in the kernel.
2581 Holds the private path used by Configure to find out the libraries.
2582 Its value is prepend to libpth. This variable takes care of special
2583 machines, like the mips. Usually, it should be empty.
2585 pm_apiversion (xs_apiversion.U):
2586 This variable contains the version of the oldest perl
2587 compatible with the present perl. (That is, pure perl modules
2588 written for $pm_apiversion will still work for the current
2589 version). perl.c:incpush() and lib/lib.pm will automatically
2590 search in $sitelib for older directories across major versions
2591 back to pm_apiversion. This is only useful if you have a perl
2592 library directory tree structured like the default one. The
2593 versioned site_perl library was introduced in 5.005, so that's
2594 the default setting for this variable. It's hard to imagine
2595 it changing before Perl6. It is included here for symmetry
2596 with xs_apiveprsion -- the searching algorithms will
2597 (presumably) be similar.
2598 See the INSTALL file for how this works.
2601 This variable is defined but not used by Configure.
2602 The value is a plain '' and is not useful.
2605 This variable is defined but not used by Configure.
2606 The value is a plain '' and is not useful.
2609 This variable holds the name of the directory below which the
2610 user will install the package. Usually, this is /usr/local, and
2611 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2612 man pages in /usr/local/man, etc. It is only used to set defaults
2613 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2615 prefixexp (prefix.U):
2616 This variable holds the full absolute path of the directory below
2617 which the user will install the package. Derived from prefix.
2619 privlib (privlib.U):
2620 This variable contains the eventual value of the PRIVLIB symbol,
2621 which is the name of the private library for this package. It may
2622 have a ~ on the front. It is up to the makefile to eventually create
2623 this directory while performing installation (with ~ substitution).
2625 privlibexp (privlib.U):
2626 This variable is the ~name expanded version of privlib, so that you
2627 may use it directly in Makefiles or shell scripts.
2629 prototype (prototype.U):
2630 This variable holds the eventual value of CAN_PROTOTYPE, which
2631 indicates the C compiler can handle funciton prototypes.
2633 ptrsize (ptrsize.U):
2634 This variable contains the value of the PTRSIZE symbol, which
2635 indicates to the C program how many bytes there are in a pointer.
2637 randbits (randfunc.U):
2638 Indicates how many bits are produced by the function used to
2639 generate normalized random numbers.
2641 randfunc (randfunc.U):
2642 Indicates the name of the random number function to use.
2643 Values include drand48, random, and rand. In C programs,
2644 the 'Drand01' macro is defined to generate uniformly distributed
2645 random numbers over the range [0., 1.[ (see drand01 and nrand).
2647 randseedtype (randfunc.U):
2648 Indicates the type of the argument of the seedfunc.
2650 ranlib (orderlib.U):
2651 This variable is set to the pathname of the ranlib program, if it is
2652 needed to generate random libraries. Set to ":" if ar can generate
2653 random libraries or if random libraries are not supported
2655 rd_nodata (nblock_io.U):
2656 This variable holds the return code from read() when no data is
2657 present. It should be -1, but some systems return 0 when O_NDELAY is
2658 used, which is a shame because you cannot make the difference between
2659 no data and an EOF.. Sigh!
2662 This variable is used internally by Configure to determine the
2663 full pathname (if any) of the rm program. After Configure runs,
2664 the value is reset to a plain "rm" and is not useful.
2667 This variable is defined but not used by Configure.
2668 The value is a plain '' and is not useful.
2671 This variable contains 'true' or 'false' depending whether the
2672 nm extraction should be performed or not, according to the value
2673 of usenm and the flags on the Configure command line.
2675 sched_yield (d_pthread_y.U):
2676 This variable defines the way to yield the execution
2677 of the current thread.
2679 scriptdir (scriptdir.U):
2680 This variable holds the name of the directory in which the user wants
2681 to put publicly scripts for the package in question. It is either
2682 the same directory as for binaries, or a special one that can be
2683 mounted across different architectures, like /usr/share. Programs
2684 must be prepared to deal with ~name expansion.
2686 scriptdirexp (scriptdir.U):
2687 This variable is the same as scriptdir, but is filename expanded
2688 at configuration time, for programs not wanting to bother with it.
2691 This variable is used internally by Configure to determine the
2692 full pathname (if any) of the sed program. After Configure runs,
2693 the value is reset to a plain "sed" and is not useful.
2695 seedfunc (randfunc.U):
2696 Indicates the random number generating seed function.
2697 Values include srand48, srandom, and srand.
2699 selectminbits (selectminbits.U):
2700 This variable holds the minimum number of bits operated by select.
2701 That is, if you do select(n, ...), how many bits at least will be
2702 cleared in the masks if some activity is detected. Usually this
2703 is either n or 32*ceil(n/32), especially many little-endians do
2704 the latter. This is only useful if you have select(), naturally.
2706 selecttype (selecttype.U):
2707 This variable holds the type used for the 2nd, 3rd, and 4th
2708 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2709 is defined, and 'int *' otherwise. This is only useful if you
2710 have select(), naturally.
2713 This variable is defined but not used by Configure.
2714 The value is a plain '' and is not useful.
2717 This variable contains the full pathname of the shell used
2718 on this system to execute Bourne shell scripts. Usually, this will be
2719 /bin/sh, though it's possible that some systems will have /bin/ksh,
2720 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2722 This unit comes before Options.U, so you can't set sh with a '-D'
2723 option, though you can override this (and startsh)
2724 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2727 This variable is defined but not used by Configure.
2728 The value is a plain '' and is not useful.
2730 sharpbang (spitshell.U):
2731 This variable contains the string #! if this system supports that
2734 shmattype (d_shmat.U):
2735 This symbol contains the type of pointer returned by shmat().
2736 It can be 'void *' or 'char *'.
2738 shortsize (intsize.U):
2739 This variable contains the value of the SHORTSIZE symbol which
2740 indicates to the C program how many bytes there are in a short.
2742 shrpenv (libperl.U):
2743 If the user builds a shared libperl.so, then we need to tell the
2744 'perl' executable where it will be able to find the installed libperl.so.
2745 One way to do this on some systems is to set the environment variable
2746 LD_RUN_PATH to the directory that will be the final location of the
2747 shared libperl.so. The makefile can use this with something like
2748 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2750 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2753 See the main perl Makefile.SH for actual working usage.
2754 Alternatively, we might be able to use a command line option such
2755 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2756 $archlibexp/CORE (Linux).
2758 shsharp (spitshell.U):
2759 This variable tells further Configure units whether your sh can
2762 sig_count (sig_name.U):
2763 This variable holds a number larger than the largest valid
2764 signal number. This is usually the same as the NSIG macro.
2766 sig_name (sig_name.U):
2767 This variable holds the signal names, space separated. The leading
2768 SIG in signal name is removed. A ZERO is prepended to the
2769 list. This is currently not used.
2771 sig_name_init (sig_name.U):
2772 This variable holds the signal names, enclosed in double quotes and
2773 separated by commas, suitable for use in the SIG_NAME definition
2774 below. A "ZERO" is prepended to the list, and the list is
2775 terminated with a plain 0. The leading SIG in signal names
2776 is removed. See sig_num.
2778 sig_num (sig_name.U):
2779 This variable holds the signal numbers, space separated. A ZERO is
2780 prepended to the list (corresponding to the fake SIGZERO), and
2781 the list is terminated with a 0. Those numbers correspond to
2782 the value of the signal listed in the same place within the
2785 sig_num_init (sig_name.U):
2786 This variable holds the signal numbers, enclosed in double quotes and
2787 separated by commas, suitable for use in the SIG_NUM definition
2788 below. A "ZERO" is prepended to the list, and the list is
2789 terminated with a plain 0.
2791 signal_t (d_voidsig.U):
2792 This variable holds the type of the signal handler (void or int).
2794 sitearch (sitearch.U):
2795 This variable contains the eventual value of the SITEARCH symbol,
2796 which is the name of the private library for this package. It may
2797 have a ~ on the front. It is up to the makefile to eventually create
2798 this directory while performing installation (with ~ substitution).
2800 sitearchexp (sitearch.U):
2801 This variable is the ~name expanded version of sitearch, so that you
2802 may use it directly in Makefiles or shell scripts.
2804 sitebin (sitebin.U):
2805 This variable holds the name of the directory in which the user wants
2806 to put add-on publicly executable files for the package in question. It
2807 is most often a local directory such as /usr/local/bin. Programs using
2808 this variable must be prepared to deal with ~name substitution.
2810 sitebinexp (sitebin.U):
2811 This is the same as the sitebin variable, but is filename expanded at
2812 configuration time, for use in your makefiles.
2814 sitelib (sitelib.U):
2815 This variable contains the eventual value of the SITELIB symbol,
2816 which is the name of the private library for this package. It may
2817 have a ~ on the front. It is up to the makefile to eventually create
2818 this directory while performing installation (with ~ substitution).
2820 sitelibexp (sitelib.U):
2821 This variable is the ~name expanded version of sitelib, so that you
2822 may use it directly in Makefiles or shell scripts.
2824 siteprefix (siteprefix.U):
2825 This variable holds the full absolute path of the directory below
2826 which the user will install add-on packages.
2828 siteprefixexp (siteprefix.U):
2829 This variable holds the full absolute path of the directory below
2830 which the user will install add-on packages. Derived from siteprefix.
2832 sizetype (sizetype.U):
2833 This variable defines sizetype to be something like size_t,
2834 unsigned long, or whatever type is used to declare length
2835 parameters for string functions.
2838 This variable is defined but not used by Configure.
2839 The value is a plain '' and is not useful.
2842 This variable is defined but not used by Configure.
2843 The value is a plain '' and is not useful.
2846 This variable contains a flag which will tell the C compiler and loader
2847 to produce a program running with a small memory model. It is up to
2848 the Makefile to use this.
2851 This variable holds the extension used to identify shared libraries
2852 (also known as shared objects) on the system. Usually set to 'so'.
2854 sockethdr (d_socket.U):
2855 This variable has any cpp '-I' flags needed for socket support.
2857 socketlib (d_socket.U):
2858 This variable has the names of any libraries needed for socket support.
2861 This variable is used internally by Configure to determine the
2862 full pathname (if any) of the sort program. After Configure runs,
2863 the value is reset to a plain "sort" and is not useful.
2865 spackage (package.U):
2866 This variable contains the name of the package being constructed,
2867 with the first letter uppercased, i.e. suitable for starting
2870 spitshell (spitshell.U):
2871 This variable contains the command necessary to spit out a runnable
2872 shell on this system. It is either cat or a grep '-v' for # comments.
2875 This variable contains a flag which will tell the C compiler and loader
2876 to produce a program that will run in separate I and D space, for those
2877 machines that support separation of instruction and data space. It is
2878 up to the Makefile to use this.
2880 sPRId64 (quadfio.U):
2881 This variable, if defined, contains the string used by stdio to
2882 format 64-bit decimal numbers (format 'd') for output.
2884 sPRIeldbl (longdblfio.U):
2885 This variable, if defined, contains the string used by stdio to
2886 format long doubles (format 'e') for output.
2888 sPRIEldbl (longdblfio.U):
2889 This variable, if defined, contains the string used by stdio to
2890 format long doubles (format 'E') for output.
2892 sPRIfldbl (longdblfio.U):
2893 This variable, if defined, contains the string used by stdio to
2894 format long doubles (format 'f') for output.
2896 sPRIFldbl (longdblfio.U):
2897 This variable, if defined, contains the string used by stdio to
2898 format long doubles (format 'F') for output.
2900 sPRIgldbl (longdblfio.U):
2901 This variable, if defined, contains the string used by stdio to
2902 format long doubles (format 'g') for output.
2904 sPRIGldbl (longdblfio.U):
2905 This variable, if defined, contains the string used by stdio to
2906 format long doubles (format 'G') for output.
2908 sPRIi64 (quadfio.U):
2909 This variable, if defined, contains the string used by stdio to
2910 format 64-bit decimal numbers (format 'i') for output.
2912 sPRIo64 (quadfio.U):
2913 This variable, if defined, contains the string used by stdio to
2914 format 64-bit octal numbers (format 'o') for output.
2916 sPRIu64 (quadfio.U):
2917 This variable, if defined, contains the string used by stdio to
2918 format 64-bit unsigned decimal numbers (format 'u') for output.
2920 sPRIx64 (quadfio.U):
2921 This variable, if defined, contains the string used by stdio to
2922 format 64-bit hexadecimal numbers (format 'x') for output.
2924 sPRIX64 (quadfio.U):
2925 This variable, if defined, contains the string used by stdio to
2926 format 64-bit hExADECimAl numbers (format 'X') for output.
2929 This variable holds the path to the package source. It is up to
2930 the Makefile to use this variable and set VPATH accordingly to
2931 find the sources remotely.
2933 ssizetype (ssizetype.U):
2934 This variable defines ssizetype to be something like ssize_t,
2935 long or int. It is used by functions that return a count
2936 of bytes or an error condition. It must be a signed type.
2937 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2939 startperl (startperl.U):
2940 This variable contains the string to put on the front of a perl
2941 script to make sure (hopefully) that it runs with perl and not some
2942 shell. Of course, that leading line must be followed by the classical
2944 eval 'exec perl -S $0 ${1+"$@"}'
2945 if $running_under_some_shell;
2946 to guarantee perl startup should the shell execute the script. Note
2947 that this magic incatation is not understood by csh.
2949 startsh (startsh.U):
2950 This variable contains the string to put on the front of a shell
2951 script to make sure (hopefully) that it runs with sh and not some
2954 static_ext (Extensions.U):
2955 This variable holds a list of XS extension files we want to
2956 link statically into the package. It is used by Makefile.
2958 stdchar (stdchar.U):
2959 This variable conditionally defines STDCHAR to be the type of char
2960 used in stdio.h. It has the values "unsigned char" or "char".
2962 stdio_base (d_stdstdio.U):
2963 This variable defines how, given a FILE pointer, fp, to access the
2964 _base field (or equivalent) of stdio.h's FILE structure. This will
2965 be used to define the macro FILE_base(fp).
2967 stdio_bufsiz (d_stdstdio.U):
2968 This variable defines how, given a FILE pointer, fp, to determine
2969 the number of bytes store in the I/O buffer pointer to by the
2970 _base field (or equivalent) of stdio.h's FILE structure. This will
2971 be used to define the macro FILE_bufsiz(fp).
2973 stdio_cnt (d_stdstdio.U):
2974 This variable defines how, given a FILE pointer, fp, to access the
2975 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2976 be used to define the macro FILE_cnt(fp).
2978 stdio_filbuf (d_stdstdio.U):
2979 This variable defines how, given a FILE pointer, fp, to tell
2980 stdio to refill it's internal buffers (?). This will
2981 be used to define the macro FILE_filbuf(fp).
2983 stdio_ptr (d_stdstdio.U):
2984 This variable defines how, given a FILE pointer, fp, to access the
2985 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2986 be used to define the macro FILE_ptr(fp).
2988 stdio_stream_array (stdio_streams.U):
2989 This variable tells the name of the array holding the stdio streams.
2990 Usual values include _iob, __iob, and __sF.
2992 strings (i_string.U):
2993 This variable holds the full path of the string header that will be
2994 used. Typically /usr/include/string.h or /usr/include/strings.h.
2997 This variable is defined but not used by Configure.
2998 The value is a plain '' and is not useful.
3000 subversion (patchlevel.U):
3001 The subversion level of this package.
3002 The value of subversion comes from the patchlevel.h file.
3003 This is unique to perl.
3006 This variable holds the place where the manual is located on this
3007 system. It is not the place where the user wants to put his manual
3008 pages. Rather it is the place where Configure may look to find manual
3009 for unix commands (section 1 of the manual usually). See mansrc.
3012 This variable is defined but not used by Configure.
3013 The value is a plain '' and is not useful.
3016 This variable is defined but not used by Configure.
3017 The value is a plain '' and is not useful.
3020 This variable is defined but not used by Configure.
3021 The value is a plain '' and is not useful.
3024 This variable is defined but not used by Configure.
3025 The value is a plain '' and is not useful.
3028 This variable is used internally by Configure to determine the
3029 full pathname (if any) of the test program. After Configure runs,
3030 the value is reset to a plain "test" and is not useful.
3032 timeincl (i_time.U):
3033 This variable holds the full path of the included time header(s).
3035 timetype (d_time.U):
3036 This variable holds the type returned by time(). It can be long,
3037 or time_t on BSD sites (in which case <sys/types.h> should be
3038 included). Anyway, the type Time_t should be used.
3041 This variable is used internally by Configure to determine the
3042 full pathname (if any) of the touch program. After Configure runs,
3043 the value is reset to a plain "touch" and is not useful.
3046 This variable is used internally by Configure to determine the
3047 full pathname (if any) of the tr program. After Configure runs,
3048 the value is reset to a plain "tr" and is not useful.
3051 This variable contains the value to be passed to the tr(1)
3052 command to transliterate a newline. Typical values are
3053 '\012' and '\n'. This is needed for EBCDIC systems where
3054 newline is not necessarily '\012'.
3057 This variable is defined but not used by Configure.
3058 The value is a plain '' and is not useful.
3060 uidsign (uidsign.U):
3061 This variable contains the signedness of a uidtype.
3062 1 for unsigned, -1 for signed.
3064 uidtype (uidtype.U):
3065 This variable defines Uid_t to be something like uid_t, int,
3066 ushort, or whatever type is used to declare user ids in the kernel.
3069 This variable is used internally by Configure to determine the
3070 full pathname (if any) of the uname program. After Configure runs,
3071 the value is reset to a plain "uname" and is not useful.
3074 This variable is used internally by Configure to determine the
3075 full pathname (if any) of the uniq program. After Configure runs,
3076 the value is reset to a plain "uniq" and is not useful.
3078 use64bits (use64bits.U):
3079 This variable conditionally defines the USE_64_BITS symbol,
3080 and indicates that explicit 64-bit interfaces should be used
3084 This variable indicates if the the system supports dynamic
3085 loading of some sort. See also dlsrc and dlobj.
3087 uselargefiles (uselfs.U):
3088 This variable conditionally defines the USE_LARGE_FILES symbol,
3089 and indicates that large file interfaces should be used when
3090 available. The use64bits symbol will also be turned on if necessary.
3092 uselongdouble (uselongdbl.U):
3093 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3094 and indicates that long doubles should be used when available.
3096 usemorebits (usemorebits.U):
3097 This variable conditionally defines the USE_MORE_BITS symbol,
3098 and indicates that explicit 64-bit interfaces and long doubles
3099 should be used when available.
3101 usemultiplicity (usemultiplicity.U):
3102 This variable conditionally defines the MULTIPLICITY symbol,
3103 and indicates that Perl should be built to use multiplicity.
3105 usemymalloc (mallocsrc.U):
3106 This variable contains y if the malloc that comes with this package
3107 is desired over the system's version of malloc. People often include
3108 special versions of malloc for effiency, but such versions are often
3109 less portable. See also mallocsrc and mallocobj.
3110 If this is 'y', then -lmalloc is removed from $libs.
3113 This variable contains 'true' or 'false' depending whether the
3114 nm extraction is wanted or not.
3116 useopcode (Extensions.U):
3117 This variable holds either 'true' or 'false' to indicate
3118 whether the Opcode extension should be used. The sole
3119 use for this currently is to allow an easy mechanism
3120 for users to skip the Opcode extension from the Configure
3123 useperlio (useperlio.U):
3124 This variable conditionally defines the USE_PERLIO symbol,
3125 and indicates that the PerlIO abstraction should be
3128 useposix (Extensions.U):
3129 This variable holds either 'true' or 'false' to indicate
3130 whether the POSIX extension should be used. The sole
3131 use for this currently is to allow an easy mechanism
3132 for hints files to indicate that POSIX will not compile
3133 on a particular system.
3136 This variable is set to true when the user agrees to use sfio.
3137 It is set to false when sfio is not available or when the user
3138 explicitely requests not to use sfio. It is here primarily so
3139 that command-line settings can override the auto-detection of
3140 d_sfio without running into a "WHOA THERE".
3142 useshrplib (libperl.U):
3143 This variable is set to 'yes' if the user wishes
3144 to build a shared libperl, and 'no' otherwise.
3146 usesocks (usesocks.U):
3147 This variable conditionally defines the USE_SOCKS symbol,
3148 and indicates that Perl should be built to use SOCKS.
3150 usethreads (usethreads.U):
3151 This variable conditionally defines the USE_THREADS symbol,
3152 and indicates that Perl should be built to use threads.
3154 usevendorprefix (vendorprefix.U):
3155 This variable tells whether the vendorprefix
3156 and consequently other vendor* paths are in use.
3158 usevfork (d_vfork.U):
3159 This variable is set to true when the user accepts to use vfork.
3160 It is set to false when no vfork is available or when the user
3161 explicitely requests not to use vfork.
3164 This variable holds the path of the include files, which is
3165 usually /usr/include. It is mainly used by other Configure units.
3168 This variable is defined but not used by Configure.
3169 The value is a plain '' and is not useful.
3171 vendorbin (vendorbin.U):
3172 This variable contains the eventual value of the VENDORBIN symbol,
3173 which is the name of the private directory for exuctables for this package.
3174 It may have a ~ on the front. It is up to the makefile to eventually create
3175 this directory while performing installation (with ~ substitution).
3176 Vendors who distribute perl binaries may place their own
3177 extensions and modules in this directory.
3179 vendorbinexp (vendorbin.U):
3180 This variable is the ~name expanded version of vendorbin, so that you
3181 may use it directly in Makefiles or shell scripts.
3183 vendorlib (vendorlib.U):
3184 This variable contains the eventual value of the VENDORLIB symbol,
3185 which is the name of the private library for this package. It may
3186 have a ~ on the front. It is up to the makefile to eventually create
3187 this directory while performing installation (with ~ substitution).
3188 Vendors who distribute perl binaries may place their own
3189 extensions and modules in this directory.
3191 vendorlibexp (vendorlib.U):
3192 This variable is the ~name expanded version of vendorlib, so that you
3193 may use it directly in Makefiles or shell scripts.
3195 vendorprefix (vendorprefix.U):
3196 This variable holds the full absolute path of the directory below
3197 which the vendor will install add-on packages.
3199 vendorprefixexp (vendorprefix.U):
3200 This variable holds the full absolute path of the directory below
3201 which the vendor will install add-on packages. Derived from vendorprefix.
3203 version (patchlevel.U):
3204 The full version number of this package. This combines
3205 baserev, patchlevel, and subversion to get the full
3206 version number, including any possible subversions. Care
3207 is taken to use the C locale in order to get something
3208 like 5.004 instead of 5,004. This is unique to perl.
3211 This variable is defined but not used by Configure.
3212 The value is a plain '' and is not useful.
3214 voidflags (voidflags.U):
3215 This variable contains the eventual value of the VOIDFLAGS symbol,
3216 which indicates how much support of the void type is given by this
3217 compiler. See VOIDFLAGS for more info.
3220 This variable holds extra path (space-separated) used to find
3221 libraries on this platform, for example CPU-specific libraries
3222 (on multi-CPU platforms) may be listed here.
3224 xs_apiversion (xs_apiversion.U):
3225 This variable contains the version of the oldest perl binary
3226 compatible with the present perl. perl.c:incpush() and
3227 lib/lib.pm will automatically search in $sitearch for older
3228 directories across major versions back to xs_apiversion.
3229 This is only useful if you have a perl library directory tree
3230 structured like the default one.
3231 See INSTALL for how this works.
3232 The versioned site_perl directory was introduced in 5.005,
3233 so that is the lowest possible value.
3234 Since this can depend on compile time options (such as
3235 bincompat) it is set by Configure. Other non-default sources
3236 of potential incompatibility, such as multiplicity, threads,
3237 debugging, 64bits, sfio, etc., are not checked for currently,
3238 though in principle we could go snooping around in old
3242 This variable is defined but not used by Configure.
3243 The value is a plain '' and is not useful.
3246 This variable is used internally by Configure to determine the
3247 full pathname (if any) of the zip program. After Configure runs,
3248 the value is reset to a plain "zip" and is not useful.