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 This is a number which identifies the lowest version of perl
42 to have an API (for XS extensions) compatible with the present
43 version. For example, for 5.005_01, the apiversion should be
44 5.005, since 5.005_01 should be binary compatible with 5.005.
45 This should probably be incremented manually somehow, perhaps
46 from patchlevel.h. For now, we'll guess maintenance subversions
47 will retain binary compatibility.
50 This variable is be used internally by Configure to determine the
51 full pathname (if any) of the ar program. After Configure runs,
52 the value is reset to a plain "ar" and is not useful.
55 This variable holds the name of the directory in which the user wants
56 to put architecture-dependent public library files for $package.
57 It is most often a local directory such as /usr/local/lib.
58 Programs using this variable must be prepared to deal
59 with filename expansion.
61 archlibexp (archlib.U):
62 This variable is the same as the archlib variable, but is
63 filename expanded at configuration time, for convenient use.
65 archname64 (use64bits.U):
66 This variable is used for the 64-bitness part of $archname.
68 archname (archname.U):
69 This variable is a short name to characterize the current
70 architecture. It is used mainly to construct the default archlib.
73 This variable defines any additional objects that must be linked
74 in with the program on this architecture. On unix, it is usually
75 empty. It is typically used to include emulations of unix calls
76 or other facilities. For perl on OS/2, for example, this would
80 This variable is be used internally by Configure to determine the
81 full pathname (if any) of the awk program. After Configure runs,
82 the value is reset to a plain "awk" and is not useful.
85 The base revision level of this package, from the .package file.
88 This variable is defined but not used by Configure.
89 The value is a plain '' and is not useful.
92 This variable holds the name of the directory in which the user wants
93 to put publicly executable images for the package in question. It
94 is most often a local directory such as /usr/local/bin. Programs using
95 this variable must be prepared to deal with ~name substitution.
98 This is the same as the bin variable, but is filename expanded at
99 configuration time, for use in your makefiles.
102 This variable is defined but not used by Configure.
103 The value is a plain '' and is not useful.
106 This variable is be used internally by Configure to determine the
107 full pathname (if any) of the byacc program. After Configure runs,
108 the value is reset to a plain "byacc" and is not useful.
110 byteorder (byteorder.U):
111 This variable holds the byte order. In the following, larger digits
112 indicate more significance. The variable byteorder is either 4321
113 on a big-endian machine, or 1234 on a little-endian, or 87654321
114 on a Cray ... or 3412 with weird order !
117 This variable contains the \c string if that is what causes the echo
118 command to suppress newline. Otherwise it is null. Correct usage is
119 $echo $n "prompt for a question: $c".
121 castflags (d_castneg.U):
122 This variable contains a flag that precise difficulties the
123 compiler has casting odd floating values to unsigned long:
125 1 = couldn't cast < 0
126 2 = couldn't cast >= 0x80000000
127 4 = couldn't cast in argument expression list
130 This variable is be used internally by Configure to determine the
131 full pathname (if any) of the cat program. After Configure runs,
132 the value is reset to a plain "cat" and is not useful.
135 This variable holds the name of a command to execute a C compiler which
136 can resolve multiple global references that happen to have the same
137 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
139 cccdlflags (dlsrc.U):
140 This variable contains any special flags that might need to be
141 passed with 'cc -c' to compile modules to be used to create a shared
142 library that will be used for dynamic loading. For hpux, this
143 should be +z. It is up to the makefile to use it.
146 This variable contains any special flags that might need to be
147 passed to cc to link with a shared library for dynamic loading.
148 It is up to the makefile to use it. For sunos 4.1, it should
152 This variable contains any additional C compiler flags desired by
153 the user. It is up to the Makefile to use this.
155 ccsymbols (Cppsym.U):
156 The variable contains the symbols defined by the C compiler alone.
157 The symbols defined by cpp or by cc when it calls cpp are not in
158 this list, see cppsymbols and cppccsymbols.
159 The list is a space-separated list of symbol=value tokens.
162 Login name of the person who ran the Configure script and answered the
163 questions. This is used to tag both config.sh and config_h.SH.
165 cf_email (cf_email.U):
166 Electronic mail address of the person who ran Configure. This can be
167 used by units that require the user's e-mail, like MailList.U.
170 Holds the output of the "date" command when the configuration file was
171 produced. This is used to tag both config.sh and config_h.SH.
174 This variable is defined but not used by Configure.
175 The value is a plain '' and is not useful.
178 This variable is defined but not used by Configure.
179 The value is a plain '' and is not useful.
182 This variable is defined but not used by Configure.
183 The value is a plain '' and is not useful.
185 clocktype (d_times.U):
186 This variable holds the type returned by times(). It can be long,
187 or clock_t on BSD sites (in which case <sys/types.h> should be
191 This variable is be used internally by Configure to determine the
192 full pathname (if any) of the comm program. After Configure runs,
193 the value is reset to a plain "comm" and is not useful.
196 This variable is defined but not used by Configure.
197 The value is a plain '' and is not useful.
199 contains (contains.U):
200 This variable holds the command to do a grep with a proper return
201 status. On most sane systems it is simply "grep". On insane systems
202 it is a grep followed by a cat followed by a test. This variable
203 is primarily for the use of other Configure units.
206 This variable is be used internally by Configure to determine the
207 full pathname (if any) of the cp program. After Configure runs,
208 the value is reset to a plain "cp" and is not useful.
211 This variable is defined but not used by Configure.
212 The value is a plain '' and is not useful.
215 This variable is be used internally by Configure to determine the
216 full pathname (if any) of the cpp program. After Configure runs,
217 the value is reset to a plain "cpp" and is not useful.
219 cpp_stuff (cpp_stuff.U):
220 This variable contains an identification of the catenation mechanism
221 used by the C preprocessor.
223 cppccsymbols (Cppsym.U):
224 The variable contains the symbols defined by the C compiler when
225 when it calls cpp. The symbols defined by the cc alone or cpp
226 alone are not in this list, see ccsymbols and cppsymbols.
227 The list is a space-separated list of symbol=value tokens.
229 cppflags (ccflags.U):
230 This variable holds the flags that will be passed to the C pre-
231 processor. It is up to the Makefile to use it.
233 cpplast (cppstdin.U):
234 This variable has the same functionality as cppminus, only it applies
235 to cpprun and not cppstdin.
237 cppminus (cppstdin.U):
238 This variable contains the second part of the string which will invoke
239 the C preprocessor on the standard input and produce to standard
240 output. This variable will have the value "-" if cppstdin needs
241 a minus to specify standard input, otherwise the value is "".
244 This variable contains the command which will invoke a C preprocessor
245 on standard input and put the output to stdout. It is guaranteed not
246 to be a wrapper and may be a null string if no preprocessor can be
247 made directly available. This preprocessor might be different from the
248 one used by the C compiler. Don't forget to append cpplast after the
249 preprocessor options.
251 cppstdin (cppstdin.U):
252 This variable contains the command which will invoke the C
253 preprocessor on standard input and put the output to stdout.
254 It is primarily used by other Configure units that ask about
255 preprocessor symbols.
257 cppsymbols (Cppsym.U):
258 The variable contains the symbols defined by the C preprocessor
259 alone. The symbols defined by cc or by cc when it calls cpp are
260 not in this list, see ccsymbols and cppccsymbols.
261 The list is a space-separated list of symbol=value tokens.
263 crosscompile (crosscompile.U):
264 This variable conditionally defines the CROSSCOMPILE symbol
265 which signifies that the build process is be a cross-compilation.
266 This is normally set by hints files or from Configure command line.
268 cryptlib (d_crypt.U):
269 This variable holds -lcrypt or the path to a libcrypt.a archive if
270 the crypt() function is not defined in the standard C library. It is
271 up to the Makefile to use this.
274 This variable is be used internally by Configure to determine the
275 full pathname (if any) of the csh program. After Configure runs,
276 the value is reset to a plain "csh" and is not useful.
278 d_access (d_access.U):
279 This variable conditionally defines HAS_ACCESS if the access() system
280 call is available to check for access permissions using real IDs.
282 d_accessx (d_accessx.U):
283 This variable conditionally defines the HAS_ACCESSX symbol, which
284 indicates to the C program that the accessx() routine is available.
287 This variable conditionally defines the HAS_ALARM symbol, which
288 indicates to the C program that the alarm() routine is available.
290 d_archlib (archlib.U):
291 This variable conditionally defines ARCHLIB to hold the pathname
292 of architecture-dependent library files for $package. If
293 $archlib is the same as $privlib, then this is set to undef.
295 d_attribut (d_attribut.U):
296 This variable conditionally defines HASATTRIBUTE, which
297 indicates the C compiler can check for function attributes,
298 such as printf formats.
301 This variable conditionally defines the HAS_BCMP symbol if
302 the bcmp() routine is available to compare strings.
305 This variable conditionally defines the HAS_BCOPY symbol if
306 the bcopy() routine is available to copy strings.
309 This symbol conditionally defines the symbol BSD when running on a
312 d_bsdgetpgrp (d_getpgrp.U):
313 This variable conditionally defines USE_BSD_GETPGRP if
314 getpgrp needs one arguments whereas USG one needs none.
316 d_bsdsetpgrp (d_setpgrp.U):
317 This variable conditionally defines USE_BSD_SETPGRP if
318 setpgrp needs two arguments whereas USG one needs none.
319 See also d_setpgid for a POSIX interface.
322 This variable conditionally defines the HAS_BZERO symbol if
323 the bzero() routine is available to set memory to 0.
325 d_casti32 (d_casti32.U):
326 This variable conditionally defines CASTI32, which indicates
327 whether the C compiler can cast large floats to 32-bit ints.
329 d_castneg (d_castneg.U):
330 This variable conditionally defines CASTNEG, which indicates
331 wether the C compiler can cast negative float to unsigned.
333 d_charvspr (d_vprintf.U):
334 This variable conditionally defines CHARVSPRINTF if this system
335 has vsprintf returning type (char*). The trend seems to be to
336 declare it as "int vsprintf()".
339 This variable conditionally defines the HAS_CHOWN symbol, which
340 indicates to the C program that the chown() routine is available.
342 d_chroot (d_chroot.U):
343 This variable conditionally defines the HAS_CHROOT symbol, which
344 indicates to the C program that the chroot() routine is available.
346 d_chsize (d_chsize.U):
347 This variable conditionally defines the CHSIZE symbol, which
348 indicates to the C program that the chsize() routine is available
349 to truncate files. You might need a -lx to get this routine.
351 d_closedir (d_closedir.U):
352 This variable conditionally defines HAS_CLOSEDIR if closedir() is
355 d_cmsghdr_s (d_socket.U):
356 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
357 which indicates that the the struct cmsghdr is supported.
360 This variable conditionally defines the HASCONST symbol, which
361 indicates to the C program that this C compiler knows about the
365 This variable conditionally defines the CRYPT symbol, which
366 indicates to the C program that the crypt() routine is available
367 to encrypt passwords and the like.
370 This variable conditionally defines the CSH symbol, which
371 indicates to the C program that the C-shell exists.
373 d_cuserid (d_cuserid.U):
374 This variable conditionally defines the HAS_CUSERID symbol, which
375 indicates to the C program that the cuserid() routine is available
376 to get character login names.
378 d_dbl_dig (d_dbl_dig.U):
379 This variable conditionally defines d_dbl_dig if this system's
380 header files provide DBL_DIG, which is the number of significant
381 digits in a double precision number.
383 d_dbmclose64 (dbm64.U):
384 This variable conditionally defines the HAS_DBMCLOSE64 symbol, which
385 indicates to the C program that the dbmclose64() routine is available.
387 d_dbminit64 (dbm64.U):
388 This variable conditionally defines the HAS_DBMINIT64 symbol, which
389 indicates to the C program that the dbminit64() routine is available.
391 d_delete64 (dbm64.U):
392 This variable conditionally defines the HAS_DELETE64 symbol, which
393 indicates to the C program that the delete64() routine is available.
395 d_difftime (d_difftime.U):
396 This variable conditionally defines the HAS_DIFFTIME symbol, which
397 indicates to the C program that the difftime() routine is available.
399 d_dirent64_s (io64.U):
400 This symbol will be defined if the C compiler supports struct dirent64.
402 d_dirnamlen (i_dirent.U):
403 This variable conditionally defines DIRNAMLEN, which indicates
404 to the C program that the length of directory entry names is
405 provided by a d_namelen field.
407 d_dlerror (d_dlerror.U):
408 This variable conditionally defines the HAS_DLERROR symbol, which
409 indicates to the C program that the dlerror() routine is available.
411 d_dlopen (d_dlopen.U):
412 This variable conditionally defines the HAS_DLOPEN symbol, which
413 indicates to the C program that the dlopen() routine is available.
415 d_dlsymun (d_dlsymun.U):
416 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
417 indicates that we need to prepend an underscore to the symbol
418 name before calling dlsym().
420 d_dosuid (d_dosuid.U):
421 This variable conditionally defines the symbol DOSUID, which
422 tells the C program that it should insert setuid emulation code
423 on hosts which have setuid #! scripts disabled.
425 d_drand48proto (d_drand48proto.U):
426 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
427 which indicates to the C program that the system provides
428 a prototype for the drand48() function. Otherwise, it is
429 up to the program to supply one.
432 This variable conditionally defines HAS_DUP2 if dup2() is
433 available to duplicate file descriptors.
435 d_eaccess (d_eaccess.U):
436 This variable conditionally defines the HAS_EACCESS symbol, which
437 indicates to the C program that the eaccess() routine is available.
439 d_endgrent (d_endgrent.U):
440 This variable conditionally defines the HAS_ENDGRENT symbol, which
441 indicates to the C program that the endgrent() routine is available
442 for sequential access of the group database.
444 d_endhent (d_endhent.U):
445 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
446 available to close whatever was being used for host queries.
448 d_endnent (d_endnent.U):
449 This variable conditionally defines HAS_ENDNETENT if endnetent() is
450 available to close whatever was being used for network queries.
452 d_endpent (d_endpent.U):
453 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
454 available to close whatever was being used for protocol queries.
456 d_endpwent (d_endpwent.U):
457 This variable conditionally defines the HAS_ENDPWENT symbol, which
458 indicates to the C program that the endpwent() routine is available
459 for sequential access of the passwd database.
461 d_endsent (d_endsent.U):
462 This variable conditionally defines HAS_ENDSERVENT if endservent() is
463 available to close whatever was being used for service queries.
465 d_endspent (d_endspent.U):
466 This variable conditionally defines HAS_ENDSPENT if endspent() is
467 available to finalize the scan of SysV shadow password entries.
469 d_eofnblk (nblock_io.U):
470 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
471 when reading from a non-blocking I/O source.
474 This variable conditionally defines the symbols EUNICE and VAX, which
475 alerts the C program that it must deal with ideosyncracies of VMS.
477 d_fchmod (d_fchmod.U):
478 This variable conditionally defines the HAS_FCHMOD symbol, which
479 indicates to the C program that the fchmod() routine is available
480 to change mode of opened files.
482 d_fchown (d_fchown.U):
483 This variable conditionally defines the HAS_FCHOWN symbol, which
484 indicates to the C program that the fchown() routine is available
485 to change ownership of opened files.
488 This variable conditionally defines the HAS_FCNTL symbol, and indicates
489 whether the fcntl() function exists
491 d_fd_macros (d_fd_set.U):
492 This variable contains the eventual value of the HAS_FD_MACROS symbol,
493 which indicates if your C compiler knows about the macros which
494 manipulate an fd_set.
496 d_fd_set (d_fd_set.U):
497 This variable contains the eventual value of the HAS_FD_SET symbol,
498 which indicates if your C compiler knows about the fd_set typedef.
500 d_fds_bits (d_fd_set.U):
501 This variable contains the eventual value of the HAS_FDS_BITS symbol,
502 which indicates if your fd_set typedef contains the fds_bits member.
503 If you have an fd_set typedef, but the dweebs who installed it did
504 a half-fast job and neglected to provide the macros to manipulate
505 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
508 This variable conditionally defines the HAS_FETCH64 symbol, which
509 indicates to the C program that the fetch64() routine is available.
511 d_fgetpos64 (stdio64.U):
512 This variable conditionally defines the HAS_FGETPOS64 symbol, which
513 indicates to the C program that the fgetpos64() routine is available.
515 d_fgetpos (d_fgetpos.U):
516 This variable conditionally defines HAS_FGETPOS if fgetpos() is
517 available to get the file position indicator.
519 d_firstkey64 (dbm64.U):
520 This variable conditionally defines the HAS_FIRSTKEY64 symbol, which
521 indicates to the C program that the firstkey64() routine is available.
523 d_flexfnam (d_flexfnam.U):
524 This variable conditionally defines the FLEXFILENAMES symbol, which
525 indicates that the system supports filenames longer than 14 characters.
527 d_flock64_s (io64.U):
528 This symbol will be defined if the C compiler supports struct flock64.
531 This variable conditionally defines HAS_FLOCK if flock() is
532 available to do file locking.
534 d_fopen64 (stdio64.U):
535 This variable conditionally defines the HAS_FOPEN64 symbol, which
536 indicates to the C program that the fopen64() routine is available.
539 This variable conditionally defines the HAS_FORK symbol, which
540 indicates to the C program that the fork() routine is available.
542 d_fpathconf (d_pathconf.U):
543 This variable conditionally defines the HAS_FPATHCONF symbol, which
544 indicates to the C program that the pathconf() routine is available
545 to determine file-system related limits and options associated
546 with a given open file descriptor.
548 d_freopen64 (stdio64.U):
549 This variable conditionally defines the HAS_FREOPEN64 symbol, which
550 indicates to the C program that the freopen64() routine is available.
552 d_fseek64 (stdio64.U):
553 This variable conditionally defines the HAS_FSEEK64 symbol, which
554 indicates to the C program that the fseek64() routine is available.
556 d_fseeko64 (stdio64.U):
557 This variable conditionally defines the HAS_FSEEKO64 symbol, which
558 indicates to the C program that the fseeko64() routine is available.
560 d_fseeko (d_fseeko.U):
561 This variable conditionally defines the HAS_FSEEKO symbol, which
562 indicates to the C program that the fseeko() routine is available.
564 d_fsetpos64 (stdio64.U):
565 This variable conditionally defines the HAS_FSETPOS64 symbol, which
566 indicates to the C program that the fsetpos64() routine is available.
568 d_fsetpos (d_fsetpos.U):
569 This variable conditionally defines HAS_FSETPOS if fsetpos() is
570 available to set the file position indicator.
573 This variable conditionally defines the HAS_FSTAT64 symbol, which
574 indicates to the C program that the fstat64() routine is available.
576 d_fstatfs (d_statfs.U):
577 This variable conditionally defines the HAS_FSTATFS symbol, which
578 indicates to the C program that the fstatfs() routine is available.
580 d_fstatvfs (d_statvfs.U):
581 This variable conditionally defines the HAS_FSTATVFS symbol, which
582 indicates to the C program that the fstatvfs() routine is available.
584 d_ftell64 (stdio64.U):
585 This variable conditionally defines the HAS_FTELL64 symbol, which
586 indicates to the C program that the ftell64() routine is available.
588 d_ftello64 (stdio64.U):
589 This variable conditionally defines the HAS_FTELLO64 symbol, which
590 indicates to the C program that the ftello64() routine is available.
592 d_ftello (d_ftello.U):
593 This variable conditionally defines the HAS_FTELLO symbol, which
594 indicates to the C program that the ftello() routine is available.
597 This variable conditionally defines the HAS_FTIME symbol, which indicates
598 that the ftime() routine exists. The ftime() routine is basically
599 a sub-second accuracy clock.
601 d_ftruncate64 (io64.U):
602 This variable conditionally defines the HAS_FTRUNCATE64 symbol, which
603 indicates to the C program that the ftruncate64() routine is available.
605 d_Gconvert (d_gconvert.U):
606 This variable holds what Gconvert is defined as to convert
607 floating point numbers into strings. It could be 'gconvert'
608 or a more complex macro emulating gconvert with gcvt() or sprintf.
610 d_Gconvert='gconvert((x),(n),(t),(b))'
611 d_Gconvert='gcvt((x),(n),(b))'
612 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
614 d_getgrent (d_getgrent.U):
615 This variable conditionally defines the HAS_GETGRENT symbol, which
616 indicates to the C program that the getgrent() routine is available
617 for sequential access of the group database.
619 d_getgrps (d_getgrps.U):
620 This variable conditionally defines the HAS_GETGROUPS symbol, which
621 indicates to the C program that the getgroups() routine is available
622 to get the list of process groups.
624 d_gethbyaddr (d_gethbyad.U):
625 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
626 indicates to the C program that the gethostbyaddr() routine is available
627 to look up hosts by their IP addresses.
629 d_gethbyname (d_gethbynm.U):
630 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
631 indicates to the C program that the gethostbyname() routine is available
632 to look up host names in some data base or other.
634 d_gethent (d_gethent.U):
635 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
636 available to look up host names in some data base or another.
638 d_gethname (d_gethname.U):
639 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
640 indicates to the C program that the gethostname() routine may be
641 used to derive the host name.
643 d_gethostprotos (d_gethostprotos.U):
644 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
645 which indicates to the C program that <netdb.h> supplies
646 prototypes for the various gethost*() functions.
647 See also netdbtype.U for probing for various netdb types.
649 d_getlogin (d_getlogin.U):
650 This variable conditionally defines the HAS_GETLOGIN symbol, which
651 indicates to the C program that the getlogin() routine is available
652 to get the login name.
654 d_getmntent (d_getmntent.U):
655 This variable conditionally defines the HAS_GETMNTENT symbol, which
656 indicates to the C program that the getmntent() routine is available
657 to iterate through mounted files.
659 d_getnbyaddr (d_getnbyad.U):
660 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
661 indicates to the C program that the getnetbyaddr() routine is available
662 to look up networks by their IP addresses.
664 d_getnbyname (d_getnbynm.U):
665 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
666 indicates to the C program that the getnetbyname() routine is available
667 to look up networks by their names.
669 d_getnent (d_getnent.U):
670 This variable conditionally defines HAS_GETNETENT if getnetent() is
671 available to look up network names in some data base or another.
673 d_getnetprotos (d_getnetprotos.U):
674 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
675 which indicates to the C program that <netdb.h> supplies
676 prototypes for the various getnet*() functions.
677 See also netdbtype.U for probing for various netdb types.
679 d_getpbyname (d_getprotby.U):
680 This variable conditionally defines the HAS_GETPROTOBYNAME
681 symbol, which indicates to the C program that the
682 getprotobyname() routine is available to look up protocols
685 d_getpbynumber (d_getprotby.U):
686 This variable conditionally defines the HAS_GETPROTOBYNUMBER
687 symbol, which indicates to the C program that the
688 getprotobynumber() routine is available to look up protocols
691 d_getpent (d_getpent.U):
692 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
693 available to look up protocols in some data base or another.
695 d_getpgid (d_getpgid.U):
696 This variable conditionally defines the HAS_GETPGID symbol, which
697 indicates to the C program that the getpgid(pid) function
698 is available to get the process group id.
700 d_getpgrp2 (d_getpgrp2.U):
701 This variable conditionally defines the HAS_GETPGRP2 symbol, which
702 indicates to the C program that the getpgrp2() (as in DG/UX) routine
703 is available to get the current process group.
705 d_getpgrp (d_getpgrp.U):
706 This variable conditionally defines HAS_GETPGRP if getpgrp() is
707 available to get the current process group.
709 d_getppid (d_getppid.U):
710 This variable conditionally defines the HAS_GETPPID symbol, which
711 indicates to the C program that the getppid() routine is available
712 to get the parent process ID.
714 d_getprior (d_getprior.U):
715 This variable conditionally defines HAS_GETPRIORITY if getpriority()
716 is available to get a process's priority.
718 d_getprotoprotos (d_getprotoprotos.U):
719 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
720 which indicates to the C program that <netdb.h> supplies
721 prototypes for the various getproto*() functions.
722 See also netdbtype.U for probing for various netdb types.
724 d_getpwent (d_getpwent.U):
725 This variable conditionally defines the HAS_GETPWENT symbol, which
726 indicates to the C program that the getpwent() routine is available
727 for sequential access of the passwd database.
729 d_getsbyname (d_getsrvby.U):
730 This variable conditionally defines the HAS_GETSERVBYNAME
731 symbol, which indicates to the C program that the
732 getservbyname() routine is available to look up services
735 d_getsbyport (d_getsrvby.U):
736 This variable conditionally defines the HAS_GETSERVBYPORT
737 symbol, which indicates to the C program that the
738 getservbyport() routine is available to look up services
741 d_getsent (d_getsent.U):
742 This variable conditionally defines HAS_GETSERVENT if getservent() is
743 available to look up network services in some data base or another.
745 d_getservprotos (d_getservprotos.U):
746 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
747 which indicates to the C program that <netdb.h> supplies
748 prototypes for the various getserv*() functions.
749 See also netdbtype.U for probing for various netdb types.
751 d_getspent (d_getspent.U):
752 This variable conditionally defines HAS_GETSPENT if getspent() is
753 available to retrieve SysV shadow password entries sequentially.
755 d_getspnam (d_getspnam.U):
756 This variable conditionally defines HAS_GETSPNAM if getspnam() is
757 available to retrieve SysV shadow password entries by name.
759 d_gettimeod (d_ftime.U):
760 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
761 indicates that the gettimeofday() system call exists (to obtain a
762 sub-second accuracy clock). You should probably include <sys/resource.h>.
764 d_gnulibc (d_gnulibc.U):
765 Defined if we're dealing with the GNU C Library.
767 d_grpasswd (i_grp.U):
768 This variable conditionally defines GRPASSWD, which indicates
769 that struct group in <grp.h> contains gr_passwd.
771 d_hasmntopt (d_hasmntopt.U):
772 This variable conditionally defines the HAS_HASMNTOPT symbol, which
773 indicates to the C program that the hasmntopt() routine is available
774 to query the mount options of file systems.
777 This variable conditionally defines HAS_HTONL if htonl() and its
778 friends are available to do network order byte swapping.
780 d_index (d_strchr.U):
781 This variable conditionally defines HAS_INDEX if index() and
782 rindex() are available for string searching.
784 d_inetaton (d_inetaton.U):
785 This variable conditionally defines the HAS_INET_ATON symbol, which
786 indicates to the C program that the inet_aton() function is available
787 to parse IP address "dotted-quad" strings.
790 This symbol will be defined if the C compiler supports ino64_t.
792 d_int64t (i_inttypes.U):
793 This symbol will be defined if the C compiler supports int64_t.
795 d_iovec_s (i_sysuio.U):
796 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
797 which indicates that the struct iovec is supported.
799 d_isascii (d_isascii.U):
800 This variable conditionally defines the HAS_ISASCII constant,
801 which indicates to the C program that isascii() is available.
803 d_killpg (d_killpg.U):
804 This variable conditionally defines the HAS_KILLPG symbol, which
805 indicates to the C program that the killpg() routine is available
806 to kill process groups.
808 d_lchown (d_lchown.U):
809 This variable conditionally defines the HAS_LCHOWN symbol, which
810 indicates to the C program that the lchown() routine is available
811 to operate on a symbolic link (instead of following the link).
814 This variable conditionally defines HAS_LINK if link() is
815 available to create hard links.
818 This variable conditionally defines the HAS_LLSEEK symbol, which
819 indicates to the C program that the llseek() routine is available.
821 d_locconv (d_locconv.U):
822 This variable conditionally defines HAS_LOCALECONV if localeconv() is
823 available for numeric and monetary formatting conventions.
826 This variable conditionally defines the HAS_LOCKF64 symbol, which
827 indicates to the C program that the lockf64() routine is available.
830 This variable conditionally defines HAS_LOCKF if lockf() is
831 available to do file locking.
833 d_longdbl (d_longdbl.U):
834 This variable conditionally defines HAS_LONG_DOUBLE if
835 the long double type is supported.
837 d_longlong (d_longlong.U):
838 This variable conditionally defines HAS_LONG_LONG if
839 the long long type is supported.
842 This variable conditionally defines the HAS_LSEEK64 symbol, which
843 indicates to the C program that the lseek64() routine is available.
846 This variable conditionally defines the HAS_LSTAT64 symbol, which
847 indicates to the C program that the lstat64() routine is available.
850 This variable conditionally defines HAS_LSTAT if lstat() is
851 available to do file stats on symbolic links.
853 d_madvise (d_madvise.U):
854 This variable conditionally defines HAS_MADVISE if madvise() is
855 available to map a file into memory.
858 This variable conditionally defines the HAS_MBLEN symbol, which
859 indicates to the C program that the mblen() routine is available
860 to find the number of bytes in a multibye character.
862 d_mbstowcs (d_mbstowcs.U):
863 This variable conditionally defines the HAS_MBSTOWCS symbol, which
864 indicates to the C program that the mbstowcs() routine is available
865 to convert a multibyte string into a wide character string.
867 d_mbtowc (d_mbtowc.U):
868 This variable conditionally defines the HAS_MBTOWC symbol, which
869 indicates to the C program that the mbtowc() routine is available
870 to convert multibyte to a wide character.
872 d_memchr (d_memchr.U):
873 This variable conditionally defines the HAS_MEMCHR symbol, which
874 indicates to the C program that the memchr() routine is available
875 to locate characters within a C string.
877 d_memcmp (d_memcmp.U):
878 This variable conditionally defines the HAS_MEMCMP symbol, which
879 indicates to the C program that the memcmp() routine is available
880 to compare blocks of memory.
882 d_memcpy (d_memcpy.U):
883 This variable conditionally defines the HAS_MEMCPY symbol, which
884 indicates to the C program that the memcpy() routine is available
885 to copy blocks of memory.
887 d_memmove (d_memmove.U):
888 This variable conditionally defines the HAS_MEMMOVE symbol, which
889 indicates to the C program that the memmove() routine is available
890 to copy potentatially overlapping blocks of memory.
892 d_memset (d_memset.U):
893 This variable conditionally defines the HAS_MEMSET symbol, which
894 indicates to the C program that the memset() routine is available
895 to set blocks of memory.
898 This variable conditionally defines the HAS_MKDIR symbol, which
899 indicates to the C program that the mkdir() routine is available
900 to create directories..
902 d_mkfifo (d_mkfifo.U):
903 This variable conditionally defines the HAS_MKFIFO symbol, which
904 indicates to the C program that the mkfifo() routine is available.
906 d_mktime (d_mktime.U):
907 This variable conditionally defines the HAS_MKTIME symbol, which
908 indicates to the C program that the mktime() routine is available.
911 This variable conditionally defines HAS_MMAP if mmap() is
912 available to map a file into memory.
914 d_mprotect (d_mprotect.U):
915 This variable conditionally defines HAS_MPROTECT if mprotect() is
916 available to modify the access protection of a memory mapped file.
919 This variable conditionally defines the HAS_MSG symbol, which
920 indicates that the entire msg*(2) library is present.
922 d_msg_ctrunc (d_socket.U):
923 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
924 which indicates that the MSG_CTRUNC is available. #ifdef is
925 not enough because it may be an enum, glibc has been known to do this.
927 d_msg_dontroute (d_socket.U):
928 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
929 which indicates that the MSG_DONTROUTE is available. #ifdef is
930 not enough because it may be an enum, glibc has been known to do this.
932 d_msg_oob (d_socket.U):
933 This variable conditionally defines the HAS_MSG_OOB symbol,
934 which indicates that the MSG_OOB is available. #ifdef is
935 not enough because it may be an enum, glibc has been known to do this.
937 d_msg_peek (d_socket.U):
938 This variable conditionally defines the HAS_MSG_PEEK symbol,
939 which indicates that the MSG_PEEK is available. #ifdef is
940 not enough because it may be an enum, glibc has been known to do this.
942 d_msg_proxy (d_socket.U):
943 This variable conditionally defines the HAS_MSG_PROXY symbol,
944 which indicates that the MSG_PROXY is available. #ifdef is
945 not enough because it may be an enum, glibc has been known to do this.
947 d_msgctl (d_msgctl.U):
948 This variable conditionally defines the HAS_MSGCTL symbol, which
949 indicates to the C program that the msgctl() routine is available.
951 d_msgget (d_msgget.U):
952 This variable conditionally defines the HAS_MSGGET symbol, which
953 indicates to the C program that the msgget() routine is available.
955 d_msghdr_s (d_socket.U):
956 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
957 which indicates that the struct msghdr is supported.
959 d_msgrcv (d_msgrcv.U):
960 This variable conditionally defines the HAS_MSGRCV symbol, which
961 indicates to the C program that the msgrcv() routine is available.
963 d_msgsnd (d_msgsnd.U):
964 This variable conditionally defines the HAS_MSGSND symbol, which
965 indicates to the C program that the msgsnd() routine is available.
968 This variable conditionally defines HAS_MSYNC if msync() is
969 available to synchronize a mapped file.
971 d_munmap (d_munmap.U):
972 This variable conditionally defines HAS_MUNMAP if munmap() is
973 available to unmap a region mapped by mmap().
975 d_mymalloc (mallocsrc.U):
976 This variable conditionally defines MYMALLOC in case other parts
977 of the source want to take special action if MYMALLOC is used.
978 This may include different sorts of profiling or error detection.
980 d_nextkey64 (dbm64.U):
981 This variable conditionally defines the HAS_NEXTKEY64 symbol, which
982 indicates to the C program that the nextkey64() routine is available.
985 This variable conditionally defines the HAS_NICE symbol, which
986 indicates to the C program that the nice() routine is available.
989 This symbol will be defined if the C compiler supports off64_t.
992 This symbol will be defined if the C compiler supports offset_t.
994 d_old_pthread_create_joinable (d_pthrattrj.U):
995 This variable conditionally defines pthread_create_joinable.
996 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
998 d_oldpthreads (usethreads.U):
999 This variable conditionally defines the OLD_PTHREADS_API symbol,
1000 and indicates that Perl should be built to use the old
1001 draft POSIX threads API. This is only potneially meaningful if
1004 d_oldsock (d_socket.U):
1005 This variable conditionally defines the OLDSOCKET symbol, which
1006 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1008 d_open3 (d_open3.U):
1009 This variable conditionally defines the HAS_OPEN3 manifest constant,
1010 which indicates to the C program that the 3 argument version of
1011 the open(2) function is available.
1014 This variable conditionally defines the HAS_OPEN64 symbol, which
1015 indicates to the C program that the open64() routine is available.
1017 d_opendir64 (io64.U):
1018 This variable conditionally defines the HAS_OPENDIR64 symbol, which
1019 indicates to the C program that the opendir64() routine is available.
1021 d_pathconf (d_pathconf.U):
1022 This variable conditionally defines the HAS_PATHCONF symbol, which
1023 indicates to the C program that the pathconf() routine is available
1024 to determine file-system related limits and options associated
1025 with a given filename.
1027 d_pause (d_pause.U):
1028 This variable conditionally defines the HAS_PAUSE symbol, which
1029 indicates to the C program that the pause() routine is available
1030 to suspend a process until a signal is received.
1032 d_phostname (d_gethname.U):
1033 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1034 contains the shell command which, when fed to popen(), may be
1035 used to derive the host name.
1038 This variable conditionally defines the HAS_PIPE symbol, which
1039 indicates to the C program that the pipe() routine is available
1040 to create an inter-process channel.
1043 This variable conditionally defines the HAS_POLL symbol, which
1044 indicates to the C program that the poll() routine is available
1045 to poll active file descriptors.
1047 d_portable (d_portable.U):
1048 This variable conditionally defines the PORTABLE symbol, which
1049 indicates to the C program that it should not assume that it is
1050 running on the machine it was compiled on.
1052 d_pthread_yield (d_pthread_y.U):
1053 This variable conditionally defines the HAS_PTHREAD_YIELD
1054 symbol if the pthread_yield routine is available to yield
1055 the execution of the current thread.
1058 This variable conditionally defines PWAGE, which indicates
1059 that struct passwd contains pw_age.
1061 d_pwchange (i_pwd.U):
1062 This variable conditionally defines PWCHANGE, which indicates
1063 that struct passwd contains pw_change.
1065 d_pwclass (i_pwd.U):
1066 This variable conditionally defines PWCLASS, which indicates
1067 that struct passwd contains pw_class.
1069 d_pwcomment (i_pwd.U):
1070 This variable conditionally defines PWCOMMENT, which indicates
1071 that struct passwd contains pw_comment.
1073 d_pwexpire (i_pwd.U):
1074 This variable conditionally defines PWEXPIRE, which indicates
1075 that struct passwd contains pw_expire.
1077 d_pwgecos (i_pwd.U):
1078 This variable conditionally defines PWGECOS, which indicates
1079 that struct passwd contains pw_gecos.
1081 d_pwpasswd (i_pwd.U):
1082 This variable conditionally defines PWPASSWD, which indicates
1083 that struct passwd contains pw_passwd.
1085 d_pwquota (i_pwd.U):
1086 This variable conditionally defines PWQUOTA, which indicates
1087 that struct passwd contains pw_quota.
1089 d_readdir64 (io64.U):
1090 This variable conditionally defines the HAS_READDIR64 symbol, which
1091 indicates to the C program that the readdir64() routine is available.
1093 d_readdir (d_readdir.U):
1094 This variable conditionally defines HAS_READDIR if readdir() is
1095 available to read directory entries.
1097 d_readlink (d_readlink.U):
1098 This variable conditionally defines the HAS_READLINK symbol, which
1099 indicates to the C program that the readlink() routine is available
1100 to read the value of a symbolic link.
1102 d_readv (d_readv.U):
1103 This variable conditionally defines the HAS_READV symbol, which
1104 indicates to the C program that the readv() routine is available.
1106 d_recvmsg (d_socket.U):
1107 This variable conditionally defines the HAS_RECVMSG symbol,
1108 which indicates that the recvmsg is supported.
1110 d_rename (d_rename.U):
1111 This variable conditionally defines the HAS_RENAME symbol, which
1112 indicates to the C program that the rename() routine is available
1115 d_rewinddir (d_readdir.U):
1116 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1119 d_rmdir (d_rmdir.U):
1120 This variable conditionally defines HAS_RMDIR if rmdir() is
1121 available to remove directories.
1123 d_safebcpy (d_safebcpy.U):
1124 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1125 the bcopy() routine can do overlapping copies.
1127 d_safemcpy (d_safemcpy.U):
1128 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1129 the memcpy() routine can do overlapping copies.
1131 d_sanemcmp (d_sanemcmp.U):
1132 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1133 the memcpy() routine is available and can be used to compare relative
1134 magnitudes of chars with their high bits set.
1136 d_sched_yield (d_pthread_y.U):
1137 This variable conditionally defines the HAS_SCHED_YIELD
1138 symbol if the sched_yield routine is available to yield
1139 the execution of the current thread.
1141 d_scm_rights (d_socket.U):
1142 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1143 which indicates that the SCM_RIGHTS is available. #ifdef is
1144 not enough because it may be an enum, glibc has been known to do this.
1146 d_seekdir64 (io64.U):
1147 This variable conditionally defines the HAS_SEEKDIR64 symbol, which
1148 indicates to the C program that the seekdir64() routine is available.
1150 d_seekdir (d_readdir.U):
1151 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1154 d_select (d_select.U):
1155 This variable conditionally defines HAS_SELECT if select() is
1156 available to select active file descriptors. A <sys/time.h>
1157 inclusion may be necessary for the timeout field.
1160 This variable conditionally defines the HAS_SEM symbol, which
1161 indicates that the entire sem*(2) library is present.
1163 d_semctl (d_semctl.U):
1164 This variable conditionally defines the HAS_SEMCTL symbol, which
1165 indicates to the C program that the semctl() routine is available.
1167 d_semctl_semid_ds (d_union_semun.U):
1168 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1169 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1171 d_semctl_semun (d_union_semun.U):
1172 This variable conditionally defines USE_SEMCTL_SEMUN, which
1173 indicates that union semun is to be used for semctl IPC_STAT.
1175 d_semget (d_semget.U):
1176 This variable conditionally defines the HAS_SEMGET symbol, which
1177 indicates to the C program that the semget() routine is available.
1179 d_semop (d_semop.U):
1180 This variable conditionally defines the HAS_SEMOP symbol, which
1181 indicates to the C program that the semop() routine is available.
1183 d_sendmsg (d_socket.U):
1184 This variable conditionally defines the HAS_SENDMSG symbol,
1185 which indicates that the sendmsg is supported.
1187 d_setegid (d_setegid.U):
1188 This variable conditionally defines the HAS_SETEGID symbol, which
1189 indicates to the C program that the setegid() routine is available
1190 to change the effective gid of the current program.
1192 d_seteuid (d_seteuid.U):
1193 This variable conditionally defines the HAS_SETEUID symbol, which
1194 indicates to the C program that the seteuid() routine is available
1195 to change the effective uid of the current program.
1197 d_setgrent (d_setgrent.U):
1198 This variable conditionally defines the HAS_SETGRENT symbol, which
1199 indicates to the C program that the setgrent() routine is available
1200 for initializing sequential access to the group database.
1202 d_setgrps (d_setgrps.U):
1203 This variable conditionally defines the HAS_SETGROUPS symbol, which
1204 indicates to the C program that the setgroups() routine is available
1205 to set the list of process groups.
1207 d_sethent (d_sethent.U):
1208 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1211 d_setlinebuf (d_setlnbuf.U):
1212 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1213 indicates to the C program that the setlinebuf() routine is available
1214 to change stderr or stdout from block-buffered or unbuffered to a
1217 d_setlocale (d_setlocale.U):
1218 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1219 available to handle locale-specific ctype implementations.
1221 d_setnent (d_setnent.U):
1222 This variable conditionally defines HAS_SETNETENT if setnetent() is
1225 d_setpent (d_setpent.U):
1226 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1229 d_setpgid (d_setpgid.U):
1230 This variable conditionally defines the HAS_SETPGID symbol if the
1231 setpgid(pid, gpid) function is available to set process group ID.
1233 d_setpgrp2 (d_setpgrp2.U):
1234 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1235 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1236 is available to set the current process group.
1238 d_setpgrp (d_setpgrp.U):
1239 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1240 available to set the current process group.
1242 d_setprior (d_setprior.U):
1243 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1244 is available to set a process's priority.
1246 d_setpwent (d_setpwent.U):
1247 This variable conditionally defines the HAS_SETPWENT symbol, which
1248 indicates to the C program that the setpwent() routine is available
1249 for initializing sequential access to the passwd database.
1251 d_setregid (d_setregid.U):
1252 This variable conditionally defines HAS_SETREGID if setregid() is
1253 available to change the real and effective gid of the current
1256 d_setresgid (d_setregid.U):
1257 This variable conditionally defines HAS_SETRESGID if setresgid() is
1258 available to change the real, effective and saved gid of the current
1261 d_setresuid (d_setreuid.U):
1262 This variable conditionally defines HAS_SETREUID if setresuid() is
1263 available to change the real, effective and saved uid of the current
1266 d_setreuid (d_setreuid.U):
1267 This variable conditionally defines HAS_SETREUID if setreuid() is
1268 available to change the real and effective uid of the current
1271 d_setrgid (d_setrgid.U):
1272 This variable conditionally defines the HAS_SETRGID symbol, which
1273 indicates to the C program that the setrgid() routine is available
1274 to change the real gid of the current program.
1276 d_setruid (d_setruid.U):
1277 This variable conditionally defines the HAS_SETRUID symbol, which
1278 indicates to the C program that the setruid() routine is available
1279 to change the real uid of the current program.
1281 d_setsent (d_setsent.U):
1282 This variable conditionally defines HAS_SETSERVENT if setservent() is
1285 d_setsid (d_setsid.U):
1286 This variable conditionally defines HAS_SETSID if setsid() is
1287 available to set the process group ID.
1289 d_setspent (d_setspent.U):
1290 This variable conditionally defines HAS_SETSPENT if setspent() is
1291 available to initialize the scan of SysV shadow password entries.
1293 d_setvbuf (d_setvbuf.U):
1294 This variable conditionally defines the HAS_SETVBUF symbol, which
1295 indicates to the C program that the setvbuf() routine is available
1296 to change buffering on an open stdio stream.
1299 This variable conditionally defines the USE_SFIO symbol,
1300 and indicates whether sfio is available (and should be used).
1303 This variable conditionally defines the HAS_SHM symbol, which
1304 indicates that the entire shm*(2) library is present.
1306 d_shmat (d_shmat.U):
1307 This variable conditionally defines the HAS_SHMAT symbol, which
1308 indicates to the C program that the shmat() routine is available.
1310 d_shmatprototype (d_shmat.U):
1311 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1312 symbol, which indicates that sys/shm.h has a prototype for
1315 d_shmctl (d_shmctl.U):
1316 This variable conditionally defines the HAS_SHMCTL symbol, which
1317 indicates to the C program that the shmctl() routine is available.
1319 d_shmdt (d_shmdt.U):
1320 This variable conditionally defines the HAS_SHMDT symbol, which
1321 indicates to the C program that the shmdt() routine is available.
1323 d_shmget (d_shmget.U):
1324 This variable conditionally defines the HAS_SHMGET symbol, which
1325 indicates to the C program that the shmget() routine is available.
1327 d_sigaction (d_sigaction.U):
1328 This variable conditionally defines the HAS_SIGACTION symbol, which
1329 indicates that the Vr4 sigaction() routine is available.
1331 d_sigsetjmp (d_sigsetjmp.U):
1332 This variable conditionally defines the HAS_SIGSETJMP symbol,
1333 which indicates that the sigsetjmp() routine is available to
1334 call setjmp() and optionally save the process's signal mask.
1336 d_socket (d_socket.U):
1337 This variable conditionally defines HAS_SOCKET, which indicates
1338 that the BSD socket interface is supported.
1340 d_sockpair (d_socket.U):
1341 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1342 indicates that the BSD socketpair() is supported.
1345 This variable conditionally defines the HAS_STAT64 symbol, which
1346 indicates to the C program that the stat64() routine is available.
1348 d_statblks (d_statblks.U):
1349 This variable conditionally defines USE_STAT_BLOCKS
1350 if this system has a stat structure declaring
1351 st_blksize and st_blocks.
1353 d_statfs (d_statfs.U):
1354 This variable conditionally defines the HAS_STATFS symbol, which
1355 indicates to the C program that the statfs() routine is available.
1357 d_statfsflags (d_statfs.U):
1358 This variable conditionally defines the HAS_STRUCT_STATFS_FLAGS
1359 symbol, which indicates to struct statfs from has f_flags member.
1360 This kind of struct statfs is coming from sys/mount.h (BSD),
1361 not from sys/statfs.h (SYSV).
1363 d_statvfs (d_statvfs.U):
1364 This variable conditionally defines the HAS_STATVFS symbol, which
1365 indicates to the C program that the statvfs() routine is available.
1367 d_stdio_cnt_lval (d_stdstdio.U):
1368 This variable conditionally defines STDIO_CNT_LVALUE if the
1369 FILE_cnt macro can be used as an lvalue.
1371 d_stdio_ptr_lval (d_stdstdio.U):
1372 This variable conditionally defines STDIO_PTR_LVALUE if the
1373 FILE_ptr macro can be used as an lvalue.
1375 d_stdio_stream_array (stdio_streams.U):
1376 This variable tells whether there is an array holding
1379 d_stdiobase (d_stdstdio.U):
1380 This variable conditionally defines USE_STDIO_BASE if this system
1381 has a FILE structure declaring a usable _base field (or equivalent)
1384 d_stdstdio (d_stdstdio.U):
1385 This variable conditionally defines USE_STDIO_PTR if this system
1386 has a FILE structure declaring usable _ptr and _cnt fields (or
1387 equivalent) in stdio.h.
1389 d_store64 (dbm64.U):
1390 This variable conditionally defines the HAS_STORE64 symbol, which
1391 indicates to the C program that the store64() routine is available.
1393 d_strchr (d_strchr.U):
1394 This variable conditionally defines HAS_STRCHR if strchr() and
1395 strrchr() are available for string searching.
1397 d_strcoll (d_strcoll.U):
1398 This variable conditionally defines HAS_STRCOLL if strcoll() is
1399 available to compare strings using collating information.
1401 d_strctcpy (d_strctcpy.U):
1402 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1403 indicates to the C program that this C compiler knows how to copy
1406 d_strerrm (d_strerror.U):
1407 This variable holds what Strerrr is defined as to translate an error
1408 code condition into an error message string. It could be 'strerror'
1409 or a more complex macro emulating strrror with sys_errlist[], or the
1410 "unknown" string when both strerror and sys_errlist are missing.
1412 d_strerror (d_strerror.U):
1413 This variable conditionally defines HAS_STRERROR if strerror() is
1414 available to translate error numbers to strings.
1416 d_strtod (d_strtod.U):
1417 This variable conditionally defines the HAS_STRTOD symbol, which
1418 indicates to the C program that the strtod() routine is available
1419 to provide better numeric string conversion than atof().
1421 d_strtol (d_strtol.U):
1422 This variable conditionally defines the HAS_STRTOL symbol, which
1423 indicates to the C program that the strtol() routine is available
1424 to provide better numeric string conversion than atoi() and friends.
1426 d_strtoul (d_strtoul.U):
1427 This variable conditionally defines the HAS_STRTOUL symbol, which
1428 indicates to the C program that the strtoul() routine is available
1429 to provide conversion of strings to unsigned long.
1431 d_strxfrm (d_strxfrm.U):
1432 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1433 available to transform strings.
1435 d_suidsafe (d_dosuid.U):
1436 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1437 if setuid scripts can be secure. This test looks in /dev/fd/.
1439 d_symlink (d_symlink.U):
1440 This variable conditionally defines the HAS_SYMLINK symbol, which
1441 indicates to the C program that the symlink() routine is available
1442 to create symbolic links.
1444 d_syscall (d_syscall.U):
1445 This variable conditionally defines HAS_SYSCALL if syscall() is
1446 available call arbitrary system calls.
1448 d_sysconf (d_sysconf.U):
1449 This variable conditionally defines the HAS_SYSCONF symbol, which
1450 indicates to the C program that the sysconf() routine is available
1451 to determine system related limits and options.
1453 d_sysernlst (d_strerror.U):
1454 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1455 is available to translate error numbers to the symbolic name.
1457 d_syserrlst (d_strerror.U):
1458 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1459 available to translate error numbers to strings.
1461 d_system (d_system.U):
1462 This variable conditionally defines HAS_SYSTEM if system() is
1463 available to issue a shell command.
1465 d_tcgetpgrp (d_tcgtpgrp.U):
1466 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1467 indicates to the C program that the tcgetpgrp() routine is available.
1468 to get foreground process group ID.
1470 d_tcsetpgrp (d_tcstpgrp.U):
1471 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1472 indicates to the C program that the tcsetpgrp() routine is available
1473 to set foreground process group ID.
1475 d_telldir64 (io64.U):
1476 This variable conditionally defines the HAS_TELLDIR64 symbol, which
1477 indicates to the C program that the telldir64() routine is available.
1479 d_telldir (d_readdir.U):
1480 This variable conditionally defines HAS_TELLDIR if telldir() is
1483 d_telldirproto (d_telldirproto.U):
1484 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1485 which indicates to the C program that the system provides
1486 a prototype for the telldir() function. Otherwise, it is
1487 up to the program to supply one.
1490 This variable conditionally defines the HAS_TIME symbol, which indicates
1491 that the time() routine exists. The time() routine is normaly
1492 provided on UNIX systems.
1494 d_times (d_times.U):
1495 This variable conditionally defines the HAS_TIMES symbol, which indicates
1496 that the times() routine exists. The times() routine is normaly
1497 provided on UNIX systems. You may have to include <sys/times.h>.
1499 d_tmpfile64 (stdio64.U):
1500 This variable conditionally defines the HAS_TMPFILE64 symbol, which
1501 indicates to the C program that the tmpfile64() routine is available.
1503 d_truncate64 (io64.U):
1504 This variable conditionally defines the HAS_TRUNCATE64 symbol, which
1505 indicates to the C program that the truncate64() routine is available.
1507 d_truncate (d_truncate.U):
1508 This variable conditionally defines HAS_TRUNCATE if truncate() is
1509 available to truncate files.
1511 d_tzname (d_tzname.U):
1512 This variable conditionally defines HAS_TZNAME if tzname[] is
1513 available to access timezone names.
1515 d_umask (d_umask.U):
1516 This variable conditionally defines the HAS_UMASK symbol, which
1517 indicates to the C program that the umask() routine is available.
1518 to set and get the value of the file creation mask.
1520 d_uname (d_gethname.U):
1521 This variable conditionally defines the HAS_UNAME symbol, which
1522 indicates to the C program that the uname() routine may be
1523 used to derive the host name.
1525 d_union_semun (d_union_semun.U):
1526 This variable conditionally defines HAS_UNION_SEMUN if the
1527 union semun is defined by including <sys/sem.h>.
1529 d_vendorlib (vendorlib.U):
1530 This variable conditionally defines PERL_VENDORLIB.
1532 d_vfork (d_vfork.U):
1533 This variable conditionally defines the HAS_VFORK symbol, which
1534 indicates the vfork() routine is available.
1536 d_void_closedir (d_closedir.U):
1537 This variable conditionally defines VOID_CLOSEDIR if closedir()
1538 does not return a value.
1540 d_voidsig (d_voidsig.U):
1541 This variable conditionally defines VOIDSIG if this system
1542 declares "void (*signal(...))()" in signal.h. The old way was to
1543 declare it as "int (*signal(...))()".
1545 d_voidtty (i_sysioctl.U):
1546 This variable conditionally defines USE_IOCNOTTY to indicate that the
1547 ioctl() call with TIOCNOTTY should be used to void tty association.
1548 Otherwise (on USG probably), it is enough to close the standard file
1549 decriptors and do a setpgrp().
1551 d_volatile (d_volatile.U):
1552 This variable conditionally defines the HASVOLATILE symbol, which
1553 indicates to the C program that this C compiler knows about the
1554 volatile declaration.
1556 d_vprintf (d_vprintf.U):
1557 This variable conditionally defines the HAS_VPRINTF symbol, which
1558 indicates to the C program that the vprintf() routine is available
1559 to printf with a pointer to an argument list.
1561 d_wait4 (d_wait4.U):
1562 This variable conditionally defines the HAS_WAIT4 symbol, which
1563 indicates the wait4() routine is available.
1565 d_waitpid (d_waitpid.U):
1566 This variable conditionally defines HAS_WAITPID if waitpid() is
1567 available to wait for child process.
1569 d_wcstombs (d_wcstombs.U):
1570 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1571 indicates to the C program that the wcstombs() routine is available
1572 to convert wide character strings to multibyte strings.
1574 d_wctomb (d_wctomb.U):
1575 This variable conditionally defines the HAS_WCTOMB symbol, which
1576 indicates to the C program that the wctomb() routine is available
1577 to convert a wide character to a multibyte.
1579 d_writev (d_writev.U):
1580 This variable conditionally defines the HAS_WRITEV symbol, which
1581 indicates to the C program that the writev() routine is available.
1584 This variable conditionally defines the symbol XENIX, which alerts
1585 the C program that it runs under Xenix.
1588 This variable is be used internally by Configure to determine the
1589 full pathname (if any) of the date program. After Configure runs,
1590 the value is reset to a plain "date" and is not useful.
1592 db_hashtype (i_db.U):
1593 This variable contains the type of the hash structure element
1594 in the <db.h> header file. In older versions of DB, it was
1595 int, while in newer ones it is u_int32_t.
1597 db_prefixtype (i_db.U):
1598 This variable contains the type of the prefix structure element
1599 in the <db.h> header file. In older versions of DB, it was
1600 int, while in newer ones it is size_t.
1602 defvoidused (voidflags.U):
1603 This variable contains the default value of the VOIDUSED symbol (15).
1605 direntrytype (i_dirent.U):
1606 This symbol is set to 'struct direct' or 'struct dirent' depending on
1607 whether dirent is available or not. You should use this pseudo type to
1608 portably declare your directory entries.
1611 This variable contains the extension that is to be used for the
1612 dynamically loaded modules that perl generaties.
1615 This variable contains the name of the dynamic loading file that
1616 will be used with the package.
1618 doublesize (doublesize.U):
1619 This variable contains the value of the DOUBLESIZE symbol, which
1620 indicates to the C program how many bytes there are in a double.
1622 drand01 (randfunc.U):
1623 Indicates the macro to be used to generate normalized
1624 random numbers. Uses randfunc, often divided by
1625 (double) (((unsigned long) 1 << randbits)) in order to
1626 normalize the result.
1627 In C programs, the macro 'Drand01' is mapped to drand01.
1629 dynamic_ext (Extensions.U):
1630 This variable holds a list of XS extension files we want to
1631 link dynamically into the package. It is used by Makefile.
1633 eagain (nblock_io.U):
1634 This variable bears the symbolic errno code set by read() when no
1635 data is present on the file and non-blocking I/O was enabled (otherwise,
1636 read() blocks naturally).
1639 This variable conditionally defines EBCDIC if this
1640 system uses EBCDIC encoding. Among other things, this
1641 means that the character ranges are not contiguous.
1645 This variable is be used internally by Configure to determine the
1646 full pathname (if any) of the echo program. After Configure runs,
1647 the value is reset to a plain "echo" and is not useful.
1650 This variable is be used internally by Configure to determine the
1651 full pathname (if any) of the egrep program. After Configure runs,
1652 the value is reset to a plain "egrep" and is not useful.
1655 This variable is defined but not used by Configure.
1656 The value is a plain '' and is not useful.
1659 When running under Eunice this variable contains a command which will
1660 convert a shell script to the proper form of text file for it to be
1661 executable by the shell. On other systems it is a no-op.
1664 This is an old synonym for _exe.
1667 This variable is be used internally by Configure to determine the
1668 full pathname (if any) of the expr program. After Configure runs,
1669 the value is reset to a plain "expr" and is not useful.
1671 extensions (Extensions.U):
1672 This variable holds a list of all extension files (both XS and
1673 non-xs linked into the package. It is propagated to Config.pm
1674 and is typically used to test whether a particular extesion
1677 fflushall (fflushall.U):
1678 This symbol, if defined, tells that to flush
1679 all pending stdio output one must loop through all
1680 the stdio file handles stored in an array and fflush them.
1681 Note that if fflushNULL is defined, fflushall will not
1682 even be probed for and will be left undefined.
1684 fflushNULL (fflushall.U):
1685 This symbol, if defined, tells that fflush(NULL) does flush
1686 all pending stdio output.
1689 This variable is defined but not used by Configure.
1690 The value is a plain '' and is not useful.
1692 firstmakefile (Unix.U):
1693 This variable defines the first file searched by make. On unix,
1694 it is makefile (then Makefile). On case-insensitive systems,
1695 it might be something else. This is only used to deal with
1696 convoluted make depend tricks.
1699 This variable is defined but not used by Configure.
1700 The value is a plain '' and is not useful.
1702 fpostype (fpostype.U):
1703 This variable defines Fpos_t to be something like fpost_t, long,
1704 uint, or whatever type is used to declare file positions in libc.
1706 freetype (mallocsrc.U):
1707 This variable contains the return type of free(). It is usually
1708 void, but occasionally int.
1711 This variable contains the full pathname to 'ar', whether or
1712 not the user has specified 'portability'. This is only used
1716 This variable contains the full pathname to 'csh', whether or
1717 not the user has specified 'portability'. This is only used
1718 in the compiled C program, and we assume that all systems which
1719 can share this executable will have the same full pathname to
1722 full_sed (Loc_sed.U):
1723 This variable contains the full pathname to 'sed', whether or
1724 not the user has specified 'portability'. This is only used
1725 in the compiled C program, and we assume that all systems which
1726 can share this executable will have the same full pathname to
1730 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1731 indicate whether the compiler is version 1 or 2. This is used in
1732 setting some of the default cflags. It is set to '' if not gcc.
1734 gidtype (gidtype.U):
1735 This variable defines Gid_t to be something like gid_t, int,
1736 ushort, or whatever type is used to declare the return type
1737 of getgid(). Typically, it is the type of group ids in the kernel.
1740 This variable holds the general path (space-separated) used to
1741 find libraries. It may contain directories that do not exist on
1742 this platform, libpth is the cleaned-up version.
1745 This variable is be used internally by Configure to determine the
1746 full pathname (if any) of the grep program. After Configure runs,
1747 the value is reset to a plain "grep" and is not useful.
1750 This variable contains a command that produces the text of the
1751 /etc/group file. This is normally "cat /etc/group", but can be
1752 "ypcat group" when NIS is used.
1754 groupstype (groupstype.U):
1755 This variable defines Groups_t to be something like gid_t, int,
1756 ushort, or whatever type is used for the second argument to
1757 getgroups() and setgroups(). Usually, this is the same as
1758 gidtype (gid_t), but sometimes it isn't.
1761 This variable is be used internally by Configure to determine the
1762 full pathname (if any) of the gzip program. After Configure runs,
1763 the value is reset to a plain "gzip" and is not useful.
1765 h_fcntl (h_fcntl.U):
1766 This is variable gets set in various places to tell i_fcntl that
1767 <fcntl.h> should be included.
1769 h_sysfile (h_sysfile.U):
1770 This is variable gets set in various places to tell i_sys_file that
1771 <sys/file.h> should be included.
1774 Gives the type of hints used for previous answers. May be one of
1775 "default", "recommended" or "previous".
1778 This variable contains a command that produces the text of the
1779 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1780 "ypcat hosts" when NIS is used.
1783 This variable contains a flag which will tell the C compiler and loader
1784 to produce a program running with a huge memory model. If the
1785 huge model is not supported, contains the flag to produce large
1786 model programs. It is up to the Makefile to use this.
1788 i_arpainet (i_arpainet.U):
1789 This variable conditionally defines the I_ARPA_INET symbol,
1790 and indicates whether a C program should include <arpa/inet.h>.
1792 i_bsdioctl (i_sysioctl.U):
1793 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1794 indicates to the C program that <sys/bsdioctl.h> exists and should
1798 This variable conditionally defines the I_DB symbol, and indicates
1799 whether a C program may include Berkeley's DB include file <db.h>.
1802 This variable conditionally defines the I_DBM symbol, which
1803 indicates to the C program that <dbm.h> exists and should
1806 i_dirent (i_dirent.U):
1807 This variable conditionally defines I_DIRENT, which indicates
1808 to the C program that it should include <dirent.h>.
1811 This variable conditionally defines the I_DLD symbol, which
1812 indicates to the C program that <dld.h> (GNU dynamic loading)
1813 exists and should be included.
1815 i_dlfcn (i_dlfcn.U):
1816 This variable conditionally defines the I_DLFCN symbol, which
1817 indicates to the C program that <dlfcn.h> exists and should
1820 i_fcntl (i_fcntl.U):
1821 This variable controls the value of I_FCNTL (which tells
1822 the C program to include <fcntl.h>).
1824 i_float (i_float.U):
1825 This variable conditionally defines the I_FLOAT symbol, and indicates
1826 whether a C program may include <float.h> to get symbols like DBL_MAX
1827 or DBL_MIN, i.e. machine dependent floating point values.
1830 This variable conditionally defines the I_GDBM symbol, which
1831 indicates to the C program that <gdbm.h> exists and should
1835 This variable conditionally defines the I_GRP symbol, and indicates
1836 whether a C program should include <grp.h>.
1838 i_inttypes (i_inttypes.U):
1839 This variable conditionally defines the I_INTTYPES symbol,
1840 and indicates whether a C program should include <inttypes.h>.
1842 i_limits (i_limits.U):
1843 This variable conditionally defines the I_LIMITS symbol, and indicates
1844 whether a C program may include <limits.h> to get symbols like WORD_BIT
1847 i_locale (i_locale.U):
1848 This variable conditionally defines the I_LOCALE symbol,
1849 and indicates whether a C program should include <locale.h>.
1851 i_machcthr (i_machcthr.U):
1852 This variable conditionally defines the I_MACH_CTHREADS symbol,
1853 and indicates whether a C program should include <mach/cthreads.h>.
1855 i_malloc (i_malloc.U):
1856 This variable conditionally defines the I_MALLOC symbol, and indicates
1857 whether a C program should include <malloc.h>.
1860 This variable conditionally defines the I_MATH symbol, and indicates
1861 whether a C program may include <math.h>.
1863 i_memory (i_memory.U):
1864 This variable conditionally defines the I_MEMORY symbol, and indicates
1865 whether a C program should include <memory.h>.
1867 i_mntent (i_mntent.U):
1868 This variable conditionally defines the I_MNTENT symbol, and indicates
1869 whether a C program should include <mntent.h>.
1872 This variable conditionally defines the I_NDBM symbol, which
1873 indicates to the C program that <ndbm.h> exists and should
1876 i_netdb (i_netdb.U):
1877 This variable conditionally defines the I_NETDB symbol, and indicates
1878 whether a C program should include <netdb.h>.
1880 i_neterrno (i_neterrno.U):
1881 This variable conditionally defines the I_NET_ERRNO symbol, which
1882 indicates to the C program that <net/errno.h> exists and should
1885 i_netinettcp (i_netinettcp.U):
1886 This variable conditionally defines the I_NETINET_TCP symbol,
1887 and indicates whether a C program should include <netinet/tcp.h>.
1890 This variable conditionally defines I_NETINET_IN, which indicates
1891 to the C program that it should include <netinet/in.h>. Otherwise,
1892 you may try <sys/in.h>.
1895 This variable conditionally defines the I_POLL symbol, and indicates
1896 whether a C program should include <poll.h>.
1898 i_pthread (i_pthread.U):
1899 This variable conditionally defines the I_PTHREADEAD symbol,
1900 and indicates whether a C program should include <pthread.h>.
1903 This variable conditionally defines I_PWD, which indicates
1904 to the C program that it should include <pwd.h>.
1906 i_rpcsvcdbm (i_dbm.U):
1907 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1908 indicates to the C program that <rpcsvc/dbm.h> exists and should
1909 be included. Some System V systems might need this instead of <dbm.h>.
1912 This variable conditionally defines the I_SFIO symbol,
1913 and indicates whether a C program should include <sfio.h>.
1915 i_sgtty (i_termio.U):
1916 This variable conditionally defines the I_SGTTY symbol, which
1917 indicates to the C program that it should include <sgtty.h> rather
1920 i_shadow (i_shadow.U):
1921 This variable conditionally defines the I_SHADOW symbol, and indicates
1922 whether a C program should include <shadow.h>.
1924 i_socks (i_socks.U):
1925 This variable conditionally defines the I_SOCKS symbol, and indicates
1926 whether a C program should include <socks.h>.
1928 i_stdarg (i_varhdr.U):
1929 This variable conditionally defines the I_STDARG symbol, which
1930 indicates to the C program that <stdarg.h> exists and should
1933 i_stddef (i_stddef.U):
1934 This variable conditionally defines the I_STDDEF symbol, which
1935 indicates to the C program that <stddef.h> exists and should
1938 i_stdlib (i_stdlib.U):
1939 This variable conditionally defines the I_STDLIB symbol, which
1940 indicates to the C program that <stdlib.h> exists and should
1943 i_string (i_string.U):
1944 This variable conditionally defines the I_STRING symbol, which
1945 indicates that <string.h> should be included rather than <strings.h>.
1947 i_sysaccess (i_sysaccess.U):
1948 This variable conditionally defines the I_SYS_ACCESS symbol,
1949 and indicates whether a C program should include <sys/access.h>.
1951 i_sysdir (i_sysdir.U):
1952 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1953 whether a C program should include <sys/dir.h>.
1955 i_sysfile (i_sysfile.U):
1956 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1957 whether a C program should include <sys/file.h> to get R_OK and friends.
1959 i_sysfilio (i_sysioctl.U):
1960 This variable conditionally defines the I_SYS_FILIO symbol, which
1961 indicates to the C program that <sys/filio.h> exists and should
1962 be included in preference to <sys/ioctl.h>.
1965 This variable conditionally defines I_SYS_IN, which indicates
1966 to the C program that it should include <sys/in.h> instead of
1969 i_sysioctl (i_sysioctl.U):
1970 This variable conditionally defines the I_SYS_IOCTL symbol, which
1971 indicates to the C program that <sys/ioctl.h> exists and should
1974 i_sysmman (i_sysmman.U):
1975 This variable conditionally defines the I_SYS_MMAN symbol, and
1976 indicates whether a C program should include <sys/mman.h>.
1978 i_sysmount (i_sysmount.U):
1979 This variable conditionally defines the I_SYSMOUNT symbol,
1980 and indicates whether a C program should include <sys/mount.h>.
1982 i_sysndir (i_sysndir.U):
1983 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1984 whether a C program should include <sys/ndir.h>.
1986 i_sysparam (i_sysparam.U):
1987 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1988 whether a C program should include <sys/param.h>.
1990 i_sysresrc (i_sysresrc.U):
1991 This variable conditionally defines the I_SYS_RESOURCE symbol,
1992 and indicates whether a C program should include <sys/resource.h>.
1994 i_syssecrt (i_syssecrt.U):
1995 This variable conditionally defines the I_SYS_SECURITY symbol,
1996 and indicates whether a C program should include <sys/security.h>.
1998 i_sysselct (i_sysselct.U):
1999 This variable conditionally defines I_SYS_SELECT, which indicates
2000 to the C program that it should include <sys/select.h> in order to
2001 get the definition of struct timeval.
2003 i_syssockio (i_sysioctl.U):
2004 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2005 C program that socket ioctl codes may be found in <sys/sockio.h>
2006 instead of <sys/ioctl.h>.
2008 i_sysstat (i_sysstat.U):
2009 This variable conditionally defines the I_SYS_STAT symbol,
2010 and indicates whether a C program should include <sys/stat.h>.
2012 i_sysstatvfs (i_sysstatvfs.U):
2013 This variable conditionally defines the I_SYSSTATVFS symbol,
2014 and indicates whether a C program should include <sys/statvfs.h>.
2016 i_systime (i_time.U):
2017 This variable conditionally defines I_SYS_TIME, which indicates
2018 to the C program that it should include <sys/time.h>.
2020 i_systimek (i_time.U):
2021 This variable conditionally defines I_SYS_TIME_KERNEL, which
2022 indicates to the C program that it should include <sys/time.h>
2023 with KERNEL defined.
2025 i_systimes (i_systimes.U):
2026 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2027 whether a C program should include <sys/times.h>.
2029 i_systypes (i_systypes.U):
2030 This variable conditionally defines the I_SYS_TYPES symbol,
2031 and indicates whether a C program should include <sys/types.h>.
2033 i_sysuio (i_sysuio.U):
2034 This variable conditionally defines the I_SYSUIO symbol, and indicates
2035 whether a C program should include <sys/uio.h>.
2037 i_sysun (i_sysun.U):
2038 This variable conditionally defines I_SYS_UN, which indicates
2039 to the C program that it should include <sys/un.h> to get UNIX
2040 domain socket definitions.
2042 i_syswait (i_syswait.U):
2043 This variable conditionally defines I_SYS_WAIT, which indicates
2044 to the C program that it should include <sys/wait.h>.
2046 i_termio (i_termio.U):
2047 This variable conditionally defines the I_TERMIO symbol, which
2048 indicates to the C program that it should include <termio.h> rather
2051 i_termios (i_termio.U):
2052 This variable conditionally defines the I_TERMIOS symbol, which
2053 indicates to the C program that the POSIX <termios.h> file is
2057 This variable conditionally defines I_TIME, which indicates
2058 to the C program that it should include <time.h>.
2060 i_unistd (i_unistd.U):
2061 This variable conditionally defines the I_UNISTD symbol, and indicates
2062 whether a C program should include <unistd.h>.
2064 i_utime (i_utime.U):
2065 This variable conditionally defines the I_UTIME symbol, and indicates
2066 whether a C program should include <utime.h>.
2068 i_values (i_values.U):
2069 This variable conditionally defines the I_VALUES symbol, and indicates
2070 whether a C program may include <values.h> to get symbols like MAXLONG
2073 i_varargs (i_varhdr.U):
2074 This variable conditionally defines I_VARARGS, which indicates
2075 to the C program that it should include <varargs.h>.
2077 i_varhdr (i_varhdr.U):
2078 Contains the name of the header to be included to get va_dcl definition.
2079 Typically one of varargs.h or stdarg.h.
2081 i_vfork (i_vfork.U):
2082 This variable conditionally defines the I_VFORK symbol, and indicates
2083 whether a C program should include vfork.h.
2085 ignore_versioned_solibs (libs.U):
2086 This variable should be non-empty if non-versioned shared
2087 libraries (libfoo.so.x.y) are to be ignored (because they
2088 cannot be linked against).
2091 This variable must preceed the normal include path to get hte
2092 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2093 Value can be "" or "/bsd43" on mips.
2096 This variable is defined but not used by Configure.
2097 The value is a plain '' and is not useful.
2099 installarchlib (archlib.U):
2100 This variable is really the same as archlibexp but may differ on
2101 those systems using AFS. For extra portability, only this variable
2102 should be used in makefiles.
2105 This variable is the same as binexp unless AFS is running in which case
2106 the user is explicitely prompted for it. This variable should always
2107 be used in your makefiles for maximum portability.
2109 installman1dir (man1dir.U):
2110 This variable is really the same as man1direxp, unless you are using
2111 AFS in which case it points to the read/write location whereas
2112 man1direxp only points to the read-only access location. For extra
2113 portability, you should only use this variable within your makefiles.
2115 installman3dir (man3dir.U):
2116 This variable is really the same as man3direxp, unless you are using
2117 AFS in which case it points to the read/write location whereas
2118 man3direxp only points to the read-only access location. For extra
2119 portability, you should only use this variable within your makefiles.
2121 installprefix (installprefix.U):
2122 This variable holds the name of the directory below which
2123 "make install" will install the package. For most users, this
2124 is the same as prefix. However, it is useful for
2125 installing the software into a different (usually temporary)
2126 location after which it can be bundled up and moved somehow
2127 to the final location specified by prefix.
2129 installprefixexp (installprefix.U):
2130 This variable holds the full absolute path of installprefix
2131 with all ~-expansion done.
2133 installprivlib (privlib.U):
2134 This variable is really the same as privlibexp but may differ on
2135 those systems using AFS. For extra portability, only this variable
2136 should be used in makefiles.
2138 installscript (scriptdir.U):
2139 This variable is usually the same as scriptdirexp, unless you are on
2140 a system running AFS, in which case they may differ slightly. You
2141 should always use this variable within your makefiles for portability.
2143 installsitearch (sitearch.U):
2144 This variable is really the same as sitearchexp but may differ on
2145 those systems using AFS. For extra portability, only this variable
2146 should be used in makefiles.
2148 installsitelib (sitelib.U):
2149 This variable is really the same as sitelibexp but may differ on
2150 those systems using AFS. For extra portability, only this variable
2151 should be used in makefiles.
2153 installstyle (installstyle.U):
2154 This variable describes the "style" of the perl installation.
2155 This is intended to be useful for tools that need to
2156 manipulate entire perl distributions. Perl itself doesn't use
2157 this to find its libraries -- the library directories are
2158 stored directly in Config.pm. Currently, there are only two
2159 styles: "lib" and "lib/perl5". The default library locations
2160 (e.g. privlib, sitelib) are either $prefix/lib or
2161 $prefix/lib/perl5. The former is useful if $prefix is a
2162 directory dedicated to perl (e.g. /opt/perl), while the latter
2163 is useful if $prefix is shared by many packages, e.g. if
2165 This may later be extended to include other information, so
2166 be careful with pattern-matching on the results.
2167 For compatibility with perl5.005 and earlier, the default
2168 setting is based on whether or not $prefix contains the string
2171 installusrbinperl (instubperl.U):
2172 This variable tells whether Perl should be installed also as
2173 /usr/bin/perl in addition to
2176 installvendorlib (vendorlib.U):
2177 This variable is really the same as vendorlibexp but may differ on
2178 those systems using AFS. For extra portability, only this variable
2179 should be used in makefiles.
2181 intsize (intsize.U):
2182 This variable contains the value of the INTSIZE symbol, which
2183 indicates to the C program how many bytes there are in an int.
2185 known_extensions (Extensions.U):
2186 This variable holds a list of all XS extensions included in
2190 This variable is defined but not used by Configure.
2191 The value is a plain '' and is not useful.
2194 This variable contains a flag which will tell the C compiler and loader
2195 to produce a program running with a large memory model. It is up to
2196 the Makefile to use this.
2199 This variable indicates the program to be used to link
2200 libraries for dynamic loading. On some systems, it is 'ld'.
2201 On ELF systems, it should be $cc. Mostly, we'll try to respect
2202 the hint file setting.
2204 lddlflags (dlsrc.U):
2205 This variable contains any special flags that might need to be
2206 passed to $ld to create a shared library suitable for dynamic
2207 loading. It is up to the makefile to use it. For hpux, it
2208 should be '-b'. For sunos 4.1, it is empty.
2210 ldflags (ccflags.U):
2211 This variable contains any additional C loader flags desired by
2212 the user. It is up to the Makefile to use this.
2214 ldlibpthname (libperl.U):
2215 This variable holds the name of the shared library
2216 search path, often LD_LIBRARY_PATH. To get an empty
2217 string, the hints file must set this to 'none'.
2220 This variable is be used internally by Configure to determine the
2221 full pathname (if any) of the less program. After Configure runs,
2222 the value is reset to a plain "less" and is not useful.
2225 This is an old synonym for _a.
2228 This variable contains the location of the C library.
2230 libperl (libperl.U):
2231 The perl executable is obtained by linking perlmain.c with
2232 libperl, any static extensions (usually just DynaLoader),
2233 and any other libraries needed on this system. libperl
2234 is usually libperl.a, but can also be libperl.so.xxx if
2235 the user wishes to build a perl executable with a shared
2239 This variable holds the general path (space-separated) used to find
2240 libraries. It is intended to be used by other units.
2243 This variable holds the additional libraries we want to use.
2244 It is up to the Makefile to deal with it.
2246 libswanted (Myinit.U):
2247 This variable holds a list of all the libraries we want to
2248 search. The order is chosen to pick up the c library
2249 ahead of ucb or bsd libraries for SVR4.
2252 This variable is defined but not used by Configure.
2253 The value is a plain '' and is not useful.
2256 This variable is defined but not used by Configure.
2257 The value is a plain '' and is not useful.
2259 lkflags (ccflags.U):
2260 This variable contains any additional C partial linker flags desired by
2261 the user. It is up to the Makefile to use this.
2264 This variable is be used internally by Configure to determine the
2265 full pathname (if any) of the ln program. After Configure runs,
2266 the value is reset to a plain "ln" and is not useful.
2269 This variable holds the name of the command to make
2270 symbolic links (if they are supported). It can be used
2271 in the Makefile. It is either 'ln -s' or 'ln'
2273 locincpth (ccflags.U):
2274 This variable contains a list of additional directories to be
2275 searched by the compiler. The appropriate '-I' directives will
2276 be added to ccflags. This is intended to simplify setting
2277 local directories from the Configure command line.
2278 It's not much, but it parallels the loclibpth stuff in libpth.U.
2280 loclibpth (libpth.U):
2281 This variable holds the paths (space-separated) used to find local
2282 libraries. It is prepended to libpth, and is intended to be easily
2283 set from the command line.
2285 longdblsize (d_longdbl.U):
2286 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2287 indicates to the C program how many bytes there are in a long double,
2288 if this system supports long doubles.
2290 longlongsize (d_longlong.U):
2291 This variable contains the value of the LONGLONGSIZE symbol, which
2292 indicates to the C program how many bytes there are in a long long,
2293 if this system supports long long.
2295 longsize (intsize.U):
2296 This variable contains the value of the LONGSIZE symbol, which
2297 indicates to the C program how many bytes there are in a long.
2300 This variable is defined but not used by Configure.
2301 The value is a plain '' and is not useful.
2304 This variable is defined but not used by Configure.
2305 The value is a plain '' and is not useful.
2308 This variable is be used internally by Configure to determine the
2309 full pathname (if any) of the ls program. After Configure runs,
2310 the value is reset to a plain "ls" and is not useful.
2312 lseeksize (lseektype.U):
2313 This variable defines lseektype to be something like off_t, long,
2314 or whatever type is used to declare lseek offset's type in the
2315 kernel (which also appears to be lseek's return type).
2317 lseektype (lseektype.U):
2318 This variable defines lseektype to be something like off_t, long,
2319 or whatever type is used to declare lseek offset's type in the
2320 kernel (which also appears to be lseek's return type).
2323 This variable is defined but not used by Configure.
2324 The value is a plain '' and is not useful.
2327 This variable is defined but not used by Configure.
2328 The value is a plain '' and is not useful.
2331 This variable is be used internally by Configure to determine the
2332 full pathname (if any) of the make program. After Configure runs,
2333 the value is reset to a plain "make" and is not useful.
2335 make_set_make (make.U):
2336 Some versions of 'make' set the variable MAKE. Others do not.
2337 This variable contains the string to be included in Makefile.SH
2338 so that MAKE is set if needed, and not if not needed.
2339 Possible values are:
2340 make_set_make='#' # If your make program handles this for you,
2341 make_set_make="MAKE=$make" # if it doesn't.
2342 I used a comment character so that we can distinguish a
2343 'set' value (from a previous config.sh or Configure '-D' option)
2344 from an uncomputed value.
2346 mallocobj (mallocsrc.U):
2347 This variable contains the name of the malloc.o that this package
2348 generates, if that malloc.o is preferred over the system malloc.
2349 Otherwise the value is null. This variable is intended for generating
2350 Makefiles. See mallocsrc.
2352 mallocsrc (mallocsrc.U):
2353 This variable contains the name of the malloc.c that comes with
2354 the package, if that malloc.c is preferred over the system malloc.
2355 Otherwise the value is null. This variable is intended for generating
2358 malloctype (mallocsrc.U):
2359 This variable contains the kind of ptr returned by malloc and realloc.
2361 man1dir (man1dir.U):
2362 This variable contains the name of the directory in which manual
2363 source pages are to be put. It is the responsibility of the
2364 Makefile.SH to get the value of this into the proper command.
2365 You must be prepared to do the ~name expansion yourself.
2367 man1direxp (man1dir.U):
2368 This variable is the same as the man1dir variable, but is filename
2369 expanded at configuration time, for convenient use in makefiles.
2371 man1ext (man1dir.U):
2372 This variable contains the extension that the manual page should
2373 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2376 man3dir (man3dir.U):
2377 This variable contains the name of the directory in which manual
2378 source pages are to be put. It is the responsibility of the
2379 Makefile.SH to get the value of this into the proper command.
2380 You must be prepared to do the ~name expansion yourself.
2382 man3direxp (man3dir.U):
2383 This variable is the same as the man3dir variable, but is filename
2384 expanded at configuration time, for convenient use in makefiles.
2386 man3ext (man3dir.U):
2387 This variable contains the extension that the manual page should
2388 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2392 This variable is be used internally by Configure to determine the
2393 full pathname (if any) of the Mcc program. After Configure runs,
2394 the value is reset to a plain "Mcc" and is not useful.
2397 This variable contains a flag which will tell the C compiler and loader
2398 to produce a program running with a medium memory model. If the
2399 medium model is not supported, contains the flag to produce large
2400 model programs. It is up to the Makefile to use this.
2402 mips_type (usrinc.U):
2403 This variable holds the environment type for the mips system.
2404 Possible values are "BSD 4.3" and "System V".
2407 This variable is be used internally by Configure to determine the
2408 full pathname (if any) of the mkdir program. After Configure runs,
2409 the value is reset to a plain "mkdir" and is not useful.
2411 mmaptype (d_mmap.U):
2412 This symbol contains the type of pointer returned by mmap()
2413 (and simultaneously the type of the first argument).
2414 It can be 'void *' or 'caddr_t'.
2417 This variable contains the list of memory models supported by this
2418 system. Possible component values are none, split, unsplit, small,
2419 medium, large, and huge. The component values are space separated.
2421 modetype (modetype.U):
2422 This variable defines modetype to be something like mode_t,
2423 int, unsigned short, or whatever type is used to declare file
2424 modes for system calls.
2427 This variable is be used internally by Configure to determine the
2428 full pathname (if any) of the more program. After Configure runs,
2429 the value is reset to a plain "more" and is not useful.
2431 multiarch (multiarch.U):
2432 This variable conditionally defines the MULTIARCH symbol
2433 which signifies the presence of multiplatform files.
2434 This is normally set by hints files.
2437 This variable is defined but not used by Configure.
2438 The value is a plain '' and is not useful.
2440 myarchname (archname.U):
2441 This variable holds the architecture name computed by Configure in
2442 a previous run. It is not intended to be perused by any user and
2443 should never be set in a hint file.
2445 mydomain (myhostname.U):
2446 This variable contains the eventual value of the MYDOMAIN symbol,
2447 which is the domain of the host the program is going to run on.
2448 The domain must be appended to myhostname to form a complete host name.
2449 The dot comes with mydomain, and need not be supplied by the program.
2451 myhostname (myhostname.U):
2452 This variable contains the eventual value of the MYHOSTNAME symbol,
2453 which is the name of the host the program is going to run on.
2454 The domain is not kept with hostname, but must be gotten from mydomain.
2455 The dot comes with mydomain, and need not be supplied by the program.
2457 myuname (Oldconfig.U):
2458 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2459 pseudo variables assignments in the output are stripped, thank you. The
2460 whole thing is then lower-cased.
2463 This variable contains the '-n' flag if that is what causes the echo
2464 command to suppress newline. Otherwise it is null. Correct usage is
2465 $echo $n "prompt for a question: $c".
2467 netdb_hlen_type (netdbtype.U):
2468 This variable holds the type used for the 2nd argument to
2469 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2470 This is only useful if you have gethostbyaddr(), naturally.
2472 netdb_host_type (netdbtype.U):
2473 This variable holds the type used for the 1st argument to
2474 gethostbyaddr(). Usually, this is char * or void *, possibly
2475 with or without a const prefix.
2476 This is only useful if you have gethostbyaddr(), naturally.
2478 netdb_name_type (netdbtype.U):
2479 This variable holds the type used for the argument to
2480 gethostbyname(). Usually, this is char * or const char *.
2481 This is only useful if you have gethostbyname(), naturally.
2483 netdb_net_type (netdbtype.U):
2484 This variable holds the type used for the 1st argument to
2485 getnetbyaddr(). Usually, this is int or long.
2486 This is only useful if you have getnetbyaddr(), naturally.
2489 This variable is be used internally by Configure to determine the
2490 full pathname (if any) of the nm program. After Configure runs,
2491 the value is reset to a plain "nm" and is not useful.
2494 This variable holds the options that may be necessary for nm.
2496 nm_so_opt (usenm.U):
2497 This variable holds the options that may be necessary for nm
2498 to work on a shared library but that can not be used on an
2499 archive library. Currently, this is only used by Linux, where
2500 nm --dynamic is *required* to get symbols from an ELF library which
2501 has been stripped, but nm --dynamic is *fatal* on an archive library.
2502 Maybe Linux should just always set usenm=false.
2504 nonxs_ext (Extensions.U):
2505 This variable holds a list of all non-xs extensions included
2506 in the package. All of them will be built.
2509 This variable is be used internally by Configure to determine the
2510 full pathname (if any) of the nroff program. After Configure runs,
2511 the value is reset to a plain "nroff" and is not useful.
2513 o_nonblock (nblock_io.U):
2514 This variable bears the symbol value to be used during open() or fcntl()
2515 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2516 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2517 but that is only supported by some devices.
2520 This is an old synonym for _o.
2522 old_pthread_create_joinable (d_pthrattrj.U):
2523 This variable defines the constant to use for creating joinable
2524 (aka undetached) pthreads. Unused if pthread.h defines
2525 PTHREAD_CREATE_JOINABLE. If used, possible values are
2526 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2528 optimize (ccflags.U):
2529 This variable contains any optimizer/debugger flag that should be used.
2530 It is up to the Makefile to use it.
2532 orderlib (orderlib.U):
2533 This variable is "true" if the components of libraries must be ordered
2534 (with `lorder $* | tsort`) before placing them in an archive. Set to
2535 "false" if ranlib or ar can generate random libraries.
2537 osname (Oldconfig.U):
2538 This variable contains the operating system name (e.g. sunos,
2539 solaris, hpux, etc.). It can be useful later on for setting
2540 defaults. Any spaces are replaced with underscores. It is set
2541 to a null string if we can't figure it out.
2543 osvers (Oldconfig.U):
2544 This variable contains the operating system version (e.g.
2545 4.1.3, 5.2, etc.). It is primarily used for helping select
2546 an appropriate hints file, but might be useful elsewhere for
2547 setting defaults. It is set to '' if we can't figure it out.
2548 We try to be flexible about how much of the version number
2549 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2550 same for this package, hints files might just be os_4.0 or
2551 os_4.1, etc., not keeping separate files for each little release.
2553 package (package.U):
2554 This variable contains the name of the package being constructed.
2555 It is primarily intended for the use of later Configure units.
2558 This variable contains the name of the preferred pager on the system.
2559 Usual values are (the full pathnames of) more, less, pg, or cat.
2562 This variable contains a command that produces the text of the
2563 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2564 "ypcat passwd" when NIS is used.
2566 patchlevel (patchlevel.U):
2567 The patchlevel level of this package.
2568 The value of patchlevel comes from the patchlevel.h file.
2571 This is an old synonym for p_ in Head.U, the character
2572 used to separate elements in the command shell search PATH.
2575 This variable is defined but not used by Configure.
2576 The value is a plain '' and is not useful.
2578 perladmin (perladmin.U):
2579 Electronic mail address of the perl5 administrator.
2581 perlpath (perlpath.U):
2582 This variable contains the eventual value of the PERLPATH symbol,
2583 which contains the name of the perl interpreter to be used in
2584 shell scripts and in the "eval 'exec'" idiom.
2587 This variable is be used internally by Configure to determine the
2588 full pathname (if any) of the pg program. After Configure runs,
2589 the value is reset to a plain "pg" and is not useful.
2591 phostname (myhostname.U):
2592 This variable contains the eventual value of the PHOSTNAME symbol,
2593 which is a command that can be fed to popen() to get the host name.
2594 The program should probably not presume that the domain is or isn't
2597 pidtype (pidtype.U):
2598 This variable defines PIDTYPE to be something like pid_t, int,
2599 ushort, or whatever type is used to declare process ids in the kernel.
2602 Holds the private path used by Configure to find out the libraries.
2603 Its value is prepend to libpth. This variable takes care of special
2604 machines, like the mips. Usually, it should be empty.
2607 This variable is defined but not used by Configure.
2608 The value is a plain '' and is not useful.
2611 This variable is defined but not used by Configure.
2612 The value is a plain '' and is not useful.
2615 This variable holds the name of the directory below which the
2616 user will install the package. Usually, this is /usr/local, and
2617 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2618 man pages in /usr/local/man, etc. It is only used to set defaults
2619 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2621 prefixexp (prefix.U):
2622 This variable holds the full absolute path of the directory below
2623 which the user will install the package. Derived from prefix.
2625 privlib (privlib.U):
2626 This variable contains the eventual value of the PRIVLIB symbol,
2627 which is the name of the private library for this package. It may
2628 have a ~ on the front. It is up to the makefile to eventually create
2629 this directory while performing installation (with ~ substitution).
2631 privlibexp (privlib.U):
2632 This variable is the ~name expanded version of privlib, so that you
2633 may use it directly in Makefiles or shell scripts.
2635 prototype (prototype.U):
2636 This variable holds the eventual value of CAN_PROTOTYPE, which
2637 indicates the C compiler can handle funciton prototypes.
2639 ptrsize (ptrsize.U):
2640 This variable contains the value of the PTRSIZE symbol, which
2641 indicates to the C program how many bytes there are in a pointer.
2643 randbits (randfunc.U):
2644 Indicates how many bits are produced by the function used to
2645 generate normalized random numbers.
2647 randfunc (randfunc.U):
2648 Indicates the name of the random number function to use.
2649 Values include drand48, random, and rand. In C programs,
2650 the 'Drand01' macro is defined to generate uniformly distributed
2651 random numbers over the range [0., 1.[ (see drand01 and nrand).
2653 randseedtype (randfunc.U):
2654 Indicates the type of the argument of the seedfunc.
2656 ranlib (orderlib.U):
2657 This variable is set to the pathname of the ranlib program, if it is
2658 needed to generate random libraries. Set to ":" if ar can generate
2659 random libraries or if random libraries are not supported
2661 rd_nodata (nblock_io.U):
2662 This variable holds the return code from read() when no data is
2663 present. It should be -1, but some systems return 0 when O_NDELAY is
2664 used, which is a shame because you cannot make the difference between
2665 no data and an EOF.. Sigh!
2668 This variable is be used internally by Configure to determine the
2669 full pathname (if any) of the rm program. After Configure runs,
2670 the value is reset to a plain "rm" and is not useful.
2673 This variable is defined but not used by Configure.
2674 The value is a plain '' and is not useful.
2677 This variable contains 'true' or 'false' depending whether the
2678 nm extraction should be performed or not, according to the value
2679 of usenm and the flags on the Configure command line.
2681 sched_yield (d_pthread_y.U):
2682 This variable defines the way to yield the execution
2683 of the current thread.
2685 scriptdir (scriptdir.U):
2686 This variable holds the name of the directory in which the user wants
2687 to put publicly scripts for the package in question. It is either
2688 the same directory as for binaries, or a special one that can be
2689 mounted across different architectures, like /usr/share. Programs
2690 must be prepared to deal with ~name expansion.
2692 scriptdirexp (scriptdir.U):
2693 This variable is the same as scriptdir, but is filename expanded
2694 at configuration time, for programs not wanting to bother with it.
2697 This variable is be used internally by Configure to determine the
2698 full pathname (if any) of the sed program. After Configure runs,
2699 the value is reset to a plain "sed" and is not useful.
2701 seedfunc (randfunc.U):
2702 Indicates the random number generating seed function.
2703 Values include srand48, srandom, and srand.
2705 selectminbits (selectminbits.U):
2706 This variable holds the minimum number of bits operated by select.
2707 That is, if you do select(n, ...), how many bits at least will be
2708 cleared in the masks if some activity is detected. Usually this
2709 is either n or 32*ceil(n/32), especially many little-endians do
2710 the latter. This is only useful if you have select(), naturally.
2712 selecttype (selecttype.U):
2713 This variable holds the type used for the 2nd, 3rd, and 4th
2714 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2715 is defined, and 'int *' otherwise. This is only useful if you
2716 have select(), naturally.
2719 This variable is defined but not used by Configure.
2720 The value is a plain '' and is not useful.
2723 This variable contains the full pathname of the shell used
2724 on this system to execute Bourne shell scripts. Usually, this will be
2725 /bin/sh, though it's possible that some systems will have /bin/ksh,
2726 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2728 This unit comes before Options.U, so you can't set sh with a '-D'
2729 option, though you can override this (and startsh)
2730 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2733 This variable is defined but not used by Configure.
2734 The value is a plain '' and is not useful.
2736 sharpbang (spitshell.U):
2737 This variable contains the string #! if this system supports that
2740 shmattype (d_shmat.U):
2741 This symbol contains the type of pointer returned by shmat().
2742 It can be 'void *' or 'char *'.
2744 shortsize (intsize.U):
2745 This variable contains the value of the SHORTSIZE symbol which
2746 indicates to the C program how many bytes there are in a short.
2748 shrpenv (libperl.U):
2749 If the user builds a shared libperl.so, then we need to tell the
2750 'perl' executable where it will be able to find the installed libperl.so.
2751 One way to do this on some systems is to set the environment variable
2752 LD_RUN_PATH to the directory that will be the final location of the
2753 shared libperl.so. The makefile can use this with something like
2754 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2756 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2759 See the main perl Makefile.SH for actual working usage.
2760 Alternatively, we might be able to use a command line option such
2761 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2762 $archlibexp/CORE (Linux).
2764 shsharp (spitshell.U):
2765 This variable tells further Configure units whether your sh can
2768 sig_count (sig_name.U):
2769 This variable holds a number larger than the largest valid
2770 signal number. This is usually the same as the NSIG macro.
2772 sig_name (sig_name.U):
2773 This variable holds the signal names, space separated. The leading
2774 SIG in signal name is removed. A ZERO is prepended to the
2775 list. This is currently not used.
2777 sig_name_init (sig_name.U):
2778 This variable holds the signal names, enclosed in double quotes and
2779 separated by commas, suitable for use in the SIG_NAME definition
2780 below. A "ZERO" is prepended to the list, and the list is
2781 terminated with a plain 0. The leading SIG in signal names
2782 is removed. See sig_num.
2784 sig_num (sig_name.U):
2785 This variable holds the signal numbers, space separated. A ZERO is
2786 prepended to the list (corresponding to the fake SIGZERO), and
2787 the list is terminated with a 0. Those numbers correspond to
2788 the value of the signal listed in the same place within the
2791 sig_num_init (sig_name.U):
2792 This variable holds the signal numbers, enclosed in double quotes and
2793 separated by commas, suitable for use in the SIG_NUM definition
2794 below. A "ZERO" is prepended to the list, and the list is
2795 terminated with a plain 0.
2797 signal_t (d_voidsig.U):
2798 This variable holds the type of the signal handler (void or int).
2800 sitearch (sitearch.U):
2801 This variable contains the eventual value of the SITEARCH symbol,
2802 which is the name of the private library for this package. It may
2803 have a ~ on the front. It is up to the makefile to eventually create
2804 this directory while performing installation (with ~ substitution).
2806 sitearchexp (sitearch.U):
2807 This variable is the ~name expanded version of sitearch, so that you
2808 may use it directly in Makefiles or shell scripts.
2810 sitelib (sitelib.U):
2811 This variable contains the eventual value of the SITELIB symbol,
2812 which is the name of the private library for this package. It may
2813 have a ~ on the front. It is up to the makefile to eventually create
2814 this directory while performing installation (with ~ substitution).
2816 sitelibexp (sitelib.U):
2817 This variable is the ~name expanded version of sitelib, so that you
2818 may use it directly in Makefiles or shell scripts.
2820 siteprefix (siteprefix.U):
2821 This variable holds the full absolute path of the directory below
2822 which the user will install add-on packages.
2824 siteprefixexp (siteprefix.U):
2825 This variable holds the full absolute path of the directory below
2826 which the user will install add-on packages. Derived from siteprefix.
2828 sizetype (sizetype.U):
2829 This variable defines sizetype to be something like size_t,
2830 unsigned long, or whatever type is used to declare length
2831 parameters for string functions.
2834 This variable is defined but not used by Configure.
2835 The value is a plain '' and is not useful.
2838 This variable is defined but not used by Configure.
2839 The value is a plain '' and is not useful.
2842 This variable contains a flag which will tell the C compiler and loader
2843 to produce a program running with a small memory model. It is up to
2844 the Makefile to use this.
2847 This variable holds the extension used to identify shared libraries
2848 (also known as shared objects) on the system. Usually set to 'so'.
2850 sockethdr (d_socket.U):
2851 This variable has any cpp '-I' flags needed for socket support.
2853 socketlib (d_socket.U):
2854 This variable has the names of any libraries needed for socket support.
2857 This variable is be used internally by Configure to determine the
2858 full pathname (if any) of the sort program. After Configure runs,
2859 the value is reset to a plain "sort" and is not useful.
2861 spackage (package.U):
2862 This variable contains the name of the package being constructed,
2863 with the first letter uppercased, i.e. suitable for starting
2866 spitshell (spitshell.U):
2867 This variable contains the command necessary to spit out a runnable
2868 shell on this system. It is either cat or a grep '-v' for # comments.
2871 This variable contains a flag which will tell the C compiler and loader
2872 to produce a program that will run in separate I and D space, for those
2873 machines that support separation of instruction and data space. It is
2874 up to the Makefile to use this.
2877 This variable holds the path to the package source. It is up to
2878 the Makefile to use this variable and set VPATH accordingly to
2879 find the sources remotely.
2881 ssizetype (ssizetype.U):
2882 This variable defines ssizetype to be something like ssize_t,
2883 long or int. It is used by functions that return a count
2884 of bytes or an error condition. It must be a signed type.
2885 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2887 startperl (startperl.U):
2888 This variable contains the string to put on the front of a perl
2889 script to make sure (hopefully) that it runs with perl and not some
2890 shell. Of course, that leading line must be followed by the classical
2892 eval 'exec perl -S $0 ${1+"$@"}'
2893 if $running_under_some_shell;
2894 to guarantee perl startup should the shell execute the script. Note
2895 that this magic incatation is not understood by csh.
2897 startsh (startsh.U):
2898 This variable contains the string to put on the front of a shell
2899 script to make sure (hopefully) that it runs with sh and not some
2902 static_ext (Extensions.U):
2903 This variable holds a list of XS extension files we want to
2904 link statically into the package. It is used by Makefile.
2906 stdchar (stdchar.U):
2907 This variable conditionally defines STDCHAR to be the type of char
2908 used in stdio.h. It has the values "unsigned char" or "char".
2910 stdio_base (d_stdstdio.U):
2911 This variable defines how, given a FILE pointer, fp, to access the
2912 _base field (or equivalent) of stdio.h's FILE structure. This will
2913 be used to define the macro FILE_base(fp).
2915 stdio_bufsiz (d_stdstdio.U):
2916 This variable defines how, given a FILE pointer, fp, to determine
2917 the number of bytes store in the I/O buffer pointer to by the
2918 _base field (or equivalent) of stdio.h's FILE structure. This will
2919 be used to define the macro FILE_bufsiz(fp).
2921 stdio_cnt (d_stdstdio.U):
2922 This variable defines how, given a FILE pointer, fp, to access the
2923 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2924 be used to define the macro FILE_cnt(fp).
2926 stdio_filbuf (d_stdstdio.U):
2927 This variable defines how, given a FILE pointer, fp, to tell
2928 stdio to refill it's internal buffers (?). This will
2929 be used to define the macro FILE_filbuf(fp).
2931 stdio_ptr (d_stdstdio.U):
2932 This variable defines how, given a FILE pointer, fp, to access the
2933 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2934 be used to define the macro FILE_ptr(fp).
2936 stdio_stream_array (stdio_streams.U):
2937 This variable tells the name of the array holding the stdio streams.
2938 Usual values include _iob, __iob, and __sF.
2940 strings (i_string.U):
2941 This variable holds the full path of the string header that will be
2942 used. Typically /usr/include/string.h or /usr/include/strings.h.
2945 This variable is defined but not used by Configure.
2946 The value is a plain '' and is not useful.
2948 subversion (patchlevel.U):
2949 The subversion level of this package.
2950 The value of subversion comes from the patchlevel.h file.
2951 This is unique to perl.
2954 This variable holds the place where the manual is located on this
2955 system. It is not the place where the user wants to put his manual
2956 pages. Rather it is the place where Configure may look to find manual
2957 for unix commands (section 1 of the manual usually). See mansrc.
2960 This variable is defined but not used by Configure.
2961 The value is a plain '' and is not useful.
2964 This variable is defined but not used by Configure.
2965 The value is a plain '' and is not useful.
2968 This variable is defined but not used by Configure.
2969 The value is a plain '' and is not useful.
2972 This variable is defined but not used by Configure.
2973 The value is a plain '' and is not useful.
2976 This variable is be used internally by Configure to determine the
2977 full pathname (if any) of the test program. After Configure runs,
2978 the value is reset to a plain "test" and is not useful.
2980 timeincl (i_time.U):
2981 This variable holds the full path of the included time header(s).
2983 timetype (d_time.U):
2984 This variable holds the type returned by time(). It can be long,
2985 or time_t on BSD sites (in which case <sys/types.h> should be
2986 included). Anyway, the type Time_t should be used.
2989 This variable is be used internally by Configure to determine the
2990 full pathname (if any) of the touch program. After Configure runs,
2991 the value is reset to a plain "touch" and is not useful.
2994 This variable is be used internally by Configure to determine the
2995 full pathname (if any) of the tr program. After Configure runs,
2996 the value is reset to a plain "tr" and is not useful.
2999 This variable contains the value to be passed to the tr(1)
3000 command to transliterate a newline. Typical values are
3001 '\012' and '\n'. This is needed for EBCDIC systems where
3002 newline is not necessarily '\012'.
3005 This variable is defined but not used by Configure.
3006 The value is a plain '' and is not useful.
3008 uidtype (uidtype.U):
3009 This variable defines Uid_t to be something like uid_t, int,
3010 ushort, or whatever type is used to declare user ids in the kernel.
3013 This variable is be used internally by Configure to determine the
3014 full pathname (if any) of the uname program. After Configure runs,
3015 the value is reset to a plain "uname" and is not useful.
3018 This variable is be used internally by Configure to determine the
3019 full pathname (if any) of the uniq program. After Configure runs,
3020 the value is reset to a plain "uniq" and is not useful.
3022 use64bits (use64bits.U):
3023 This variable conditionally defines the USE_64_BITS symbol,
3024 and indicates that explicit 64-bit interfaces should be used
3028 This variable indicates if the the system supports dynamic
3029 loading of some sort. See also dlsrc and dlobj.
3031 usemultiplicity (usemultiplicity.U):
3032 This variable conditionally defines the MULTIPLICITY symbol,
3033 and indicates that Perl should be built to use multiplicity.
3035 usemymalloc (mallocsrc.U):
3036 This variable contains y if the malloc that comes with this package
3037 is desired over the system's version of malloc. People often include
3038 special versions of malloc for effiency, but such versions are often
3039 less portable. See also mallocsrc and mallocobj.
3040 If this is 'y', then -lmalloc is removed from $libs.
3043 This variable contains 'true' or 'false' depending whether the
3044 nm extraction is wanted or not.
3046 useopcode (Extensions.U):
3047 This variable holds either 'true' or 'false' to indicate
3048 whether the Opcode extension should be used. The sole
3049 use for this currently is to allow an easy mechanism
3050 for users to skip the Opcode extension from the Configure
3053 useperlio (useperlio.U):
3054 This variable conditionally defines the USE_PERLIO symbol,
3055 and indicates that the PerlIO abstraction should be
3058 useposix (Extensions.U):
3059 This variable holds either 'true' or 'false' to indicate
3060 whether the POSIX extension should be used. The sole
3061 use for this currently is to allow an easy mechanism
3062 for hints files to indicate that POSIX will not compile
3063 on a particular system.
3066 This variable is set to true when the user agrees to use sfio.
3067 It is set to false when sfio is not available or when the user
3068 explicitely requests not to use sfio. It is here primarily so
3069 that command-line settings can override the auto-detection of
3070 d_sfio without running into a "WHOA THERE".
3072 useshrplib (libperl.U):
3073 This variable is set to 'yes' if the user wishes
3074 to build a shared libperl, and 'no' otherwise.
3076 usesocks (usesocks.U):
3077 This variable conditionally defines the USE_SOCKS symbol,
3078 and indicates that Perl should be built to use SOCKS.
3080 usethreads (usethreads.U):
3081 This variable conditionally defines the USE_THREADS symbol,
3082 and indicates that Perl should be built to use threads.
3084 usevendorprefix (vendorprefix.U):
3085 This variable tells whether the vendorprefix
3086 and consequently other vendor* paths are in use.
3088 usevfork (d_vfork.U):
3089 This variable is set to true when the user accepts to use vfork.
3090 It is set to false when no vfork is available or when the user
3091 explicitely requests not to use vfork.
3094 This variable holds the path of the include files, which is
3095 usually /usr/include. It is mainly used by other Configure units.
3098 This variable is defined but not used by Configure.
3099 The value is a plain '' and is not useful.
3101 vendorlib (vendorlib.U):
3102 This variable contains the eventual value of the VENDORLIB symbol,
3103 which is the name of the private library for this package. It may
3104 have a ~ on the front. It is up to the makefile to eventually create
3105 this directory while performing installation (with ~ substitution).
3106 Vendors who distribute perl binaries may place their own
3107 extensions and modules in this directory.
3109 vendorlibexp (vendorlib.U):
3110 This variable is the ~name expanded version of vendorlib, so that you
3111 may use it directly in Makefiles or shell scripts.
3113 vendorprefix (vendorprefix.U):
3114 This variable holds the full absolute path of the directory below
3115 which the vendor will install add-on packages.
3117 vendorprefixexp (vendorprefix.U):
3118 This variable holds the full absolute path of the directory below
3119 which the vendor will install add-on packages. Derived from vendorprefix.
3121 version (patchlevel.U):
3122 The full version number of this package. This combines
3123 baserev, patchlevel, and subversion to get the full
3124 version number, including any possible subversions. Care
3125 is taken to use the C locale in order to get something
3126 like 5.004 instead of 5,004. This is unique to perl.
3129 This variable is defined but not used by Configure.
3130 The value is a plain '' and is not useful.
3132 voidflags (voidflags.U):
3133 This variable contains the eventual value of the VOIDFLAGS symbol,
3134 which indicates how much support of the void type is given by this
3135 compiler. See VOIDFLAGS for more info.
3138 This variable holds extra path (space-separated) used to find
3139 libraries on this platform, for example CPU-specific libraries
3140 (on multi-CPU platforms) may be listed here.
3143 This variable is defined but not used by Configure.
3144 The value is a plain '' and is not useful.
3147 This variable is be used internally by Configure to determine the
3148 full pathname (if any) of the zip program. After Configure runs,
3149 the value is reset to a plain "zip" and is not useful.