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_vfork (d_vfork.U):
1530 This variable conditionally defines the HAS_VFORK symbol, which
1531 indicates the vfork() routine is available.
1533 d_void_closedir (d_closedir.U):
1534 This variable conditionally defines VOID_CLOSEDIR if closedir()
1535 does not return a value.
1537 d_voidsig (d_voidsig.U):
1538 This variable conditionally defines VOIDSIG if this system
1539 declares "void (*signal(...))()" in signal.h. The old way was to
1540 declare it as "int (*signal(...))()".
1542 d_voidtty (i_sysioctl.U):
1543 This variable conditionally defines USE_IOCNOTTY to indicate that the
1544 ioctl() call with TIOCNOTTY should be used to void tty association.
1545 Otherwise (on USG probably), it is enough to close the standard file
1546 decriptors and do a setpgrp().
1548 d_volatile (d_volatile.U):
1549 This variable conditionally defines the HASVOLATILE symbol, which
1550 indicates to the C program that this C compiler knows about the
1551 volatile declaration.
1553 d_vprintf (d_vprintf.U):
1554 This variable conditionally defines the HAS_VPRINTF symbol, which
1555 indicates to the C program that the vprintf() routine is available
1556 to printf with a pointer to an argument list.
1558 d_wait4 (d_wait4.U):
1559 This variable conditionally defines the HAS_WAIT4 symbol, which
1560 indicates the wait4() routine is available.
1562 d_waitpid (d_waitpid.U):
1563 This variable conditionally defines HAS_WAITPID if waitpid() is
1564 available to wait for child process.
1566 d_wcstombs (d_wcstombs.U):
1567 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1568 indicates to the C program that the wcstombs() routine is available
1569 to convert wide character strings to multibyte strings.
1571 d_wctomb (d_wctomb.U):
1572 This variable conditionally defines the HAS_WCTOMB symbol, which
1573 indicates to the C program that the wctomb() routine is available
1574 to convert a wide character to a multibyte.
1576 d_writev (d_writev.U):
1577 This variable conditionally defines the HAS_WRITEV symbol, which
1578 indicates to the C program that the writev() routine is available.
1581 This variable conditionally defines the symbol XENIX, which alerts
1582 the C program that it runs under Xenix.
1585 This variable is be used internally by Configure to determine the
1586 full pathname (if any) of the date program. After Configure runs,
1587 the value is reset to a plain "date" and is not useful.
1589 db_hashtype (i_db.U):
1590 This variable contains the type of the hash structure element
1591 in the <db.h> header file. In older versions of DB, it was
1592 int, while in newer ones it is u_int32_t.
1594 db_prefixtype (i_db.U):
1595 This variable contains the type of the prefix structure element
1596 in the <db.h> header file. In older versions of DB, it was
1597 int, while in newer ones it is size_t.
1599 defvoidused (voidflags.U):
1600 This variable contains the default value of the VOIDUSED symbol (15).
1602 direntrytype (i_dirent.U):
1603 This symbol is set to 'struct direct' or 'struct dirent' depending on
1604 whether dirent is available or not. You should use this pseudo type to
1605 portably declare your directory entries.
1608 This variable contains the extension that is to be used for the
1609 dynamically loaded modules that perl generaties.
1612 This variable contains the name of the dynamic loading file that
1613 will be used with the package.
1615 doublesize (doublesize.U):
1616 This variable contains the value of the DOUBLESIZE symbol, which
1617 indicates to the C program how many bytes there are in a double.
1619 drand01 (randfunc.U):
1620 Indicates the macro to be used to generate normalized
1621 random numbers. Uses randfunc, often divided by
1622 (double) (((unsigned long) 1 << randbits)) in order to
1623 normalize the result.
1624 In C programs, the macro 'Drand01' is mapped to drand01.
1626 dynamic_ext (Extensions.U):
1627 This variable holds a list of XS extension files we want to
1628 link dynamically into the package. It is used by Makefile.
1630 eagain (nblock_io.U):
1631 This variable bears the symbolic errno code set by read() when no
1632 data is present on the file and non-blocking I/O was enabled (otherwise,
1633 read() blocks naturally).
1636 This variable conditionally defines EBCDIC if this
1637 system uses EBCDIC encoding. Among other things, this
1638 means that the character ranges are not contiguous.
1642 This variable is be used internally by Configure to determine the
1643 full pathname (if any) of the echo program. After Configure runs,
1644 the value is reset to a plain "echo" and is not useful.
1647 This variable is be used internally by Configure to determine the
1648 full pathname (if any) of the egrep program. After Configure runs,
1649 the value is reset to a plain "egrep" and is not useful.
1652 This variable is defined but not used by Configure.
1653 The value is a plain '' and is not useful.
1656 When running under Eunice this variable contains a command which will
1657 convert a shell script to the proper form of text file for it to be
1658 executable by the shell. On other systems it is a no-op.
1661 This is an old synonym for _exe.
1664 This variable is be used internally by Configure to determine the
1665 full pathname (if any) of the expr program. After Configure runs,
1666 the value is reset to a plain "expr" and is not useful.
1668 extensions (Extensions.U):
1669 This variable holds a list of all extension files (both XS and
1670 non-xs linked into the package. It is propagated to Config.pm
1671 and is typically used to test whether a particular extesion
1674 fflushall (fflushall.U):
1675 This symbol, if defined, tells that to flush
1676 all pending stdio output one must loop through all
1677 the stdio file handles stored in an array and fflush them.
1678 Note that if fflushNULL is defined, fflushall will not
1679 even be probed for and will be left undefined.
1681 fflushNULL (fflushall.U):
1682 This symbol, if defined, tells that fflush(NULL) does flush
1683 all pending stdio output.
1686 This variable is defined but not used by Configure.
1687 The value is a plain '' and is not useful.
1689 firstmakefile (Unix.U):
1690 This variable defines the first file searched by make. On unix,
1691 it is makefile (then Makefile). On case-insensitive systems,
1692 it might be something else. This is only used to deal with
1693 convoluted make depend tricks.
1696 This variable is defined but not used by Configure.
1697 The value is a plain '' and is not useful.
1699 fpostype (fpostype.U):
1700 This variable defines Fpos_t to be something like fpost_t, long,
1701 uint, or whatever type is used to declare file positions in libc.
1703 freetype (mallocsrc.U):
1704 This variable contains the return type of free(). It is usually
1705 void, but occasionally int.
1708 This variable contains the full pathname to 'ar', whether or
1709 not the user has specified 'portability'. This is only used
1713 This variable contains the full pathname to 'csh', whether or
1714 not the user has specified 'portability'. This is only used
1715 in the compiled C program, and we assume that all systems which
1716 can share this executable will have the same full pathname to
1719 full_sed (Loc_sed.U):
1720 This variable contains the full pathname to 'sed', whether or
1721 not the user has specified 'portability'. This is only used
1722 in the compiled C program, and we assume that all systems which
1723 can share this executable will have the same full pathname to
1727 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1728 indicate whether the compiler is version 1 or 2. This is used in
1729 setting some of the default cflags. It is set to '' if not gcc.
1731 gidtype (gidtype.U):
1732 This variable defines Gid_t to be something like gid_t, int,
1733 ushort, or whatever type is used to declare the return type
1734 of getgid(). Typically, it is the type of group ids in the kernel.
1737 This variable holds the general path (space-separated) used to
1738 find libraries. It may contain directories that do not exist on
1739 this platform, libpth is the cleaned-up version.
1742 This variable is be used internally by Configure to determine the
1743 full pathname (if any) of the grep program. After Configure runs,
1744 the value is reset to a plain "grep" and is not useful.
1747 This variable contains a command that produces the text of the
1748 /etc/group file. This is normally "cat /etc/group", but can be
1749 "ypcat group" when NIS is used.
1751 groupstype (groupstype.U):
1752 This variable defines Groups_t to be something like gid_t, int,
1753 ushort, or whatever type is used for the second argument to
1754 getgroups() and setgroups(). Usually, this is the same as
1755 gidtype (gid_t), but sometimes it isn't.
1758 This variable is be used internally by Configure to determine the
1759 full pathname (if any) of the gzip program. After Configure runs,
1760 the value is reset to a plain "gzip" and is not useful.
1762 h_fcntl (h_fcntl.U):
1763 This is variable gets set in various places to tell i_fcntl that
1764 <fcntl.h> should be included.
1766 h_sysfile (h_sysfile.U):
1767 This is variable gets set in various places to tell i_sys_file that
1768 <sys/file.h> should be included.
1771 Gives the type of hints used for previous answers. May be one of
1772 "default", "recommended" or "previous".
1775 This variable contains a command that produces the text of the
1776 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1777 "ypcat hosts" when NIS is used.
1780 This variable contains a flag which will tell the C compiler and loader
1781 to produce a program running with a huge memory model. If the
1782 huge model is not supported, contains the flag to produce large
1783 model programs. It is up to the Makefile to use this.
1785 i_arpainet (i_arpainet.U):
1786 This variable conditionally defines the I_ARPA_INET symbol,
1787 and indicates whether a C program should include <arpa/inet.h>.
1789 i_bsdioctl (i_sysioctl.U):
1790 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1791 indicates to the C program that <sys/bsdioctl.h> exists and should
1795 This variable conditionally defines the I_DB symbol, and indicates
1796 whether a C program may include Berkeley's DB include file <db.h>.
1799 This variable conditionally defines the I_DBM symbol, which
1800 indicates to the C program that <dbm.h> exists and should
1803 i_dirent (i_dirent.U):
1804 This variable conditionally defines I_DIRENT, which indicates
1805 to the C program that it should include <dirent.h>.
1808 This variable conditionally defines the I_DLD symbol, which
1809 indicates to the C program that <dld.h> (GNU dynamic loading)
1810 exists and should be included.
1812 i_dlfcn (i_dlfcn.U):
1813 This variable conditionally defines the I_DLFCN symbol, which
1814 indicates to the C program that <dlfcn.h> exists and should
1817 i_fcntl (i_fcntl.U):
1818 This variable controls the value of I_FCNTL (which tells
1819 the C program to include <fcntl.h>).
1821 i_float (i_float.U):
1822 This variable conditionally defines the I_FLOAT symbol, and indicates
1823 whether a C program may include <float.h> to get symbols like DBL_MAX
1824 or DBL_MIN, i.e. machine dependent floating point values.
1827 This variable conditionally defines the I_GDBM symbol, which
1828 indicates to the C program that <gdbm.h> exists and should
1832 This variable conditionally defines the I_GRP symbol, and indicates
1833 whether a C program should include <grp.h>.
1835 i_inttypes (i_inttypes.U):
1836 This variable conditionally defines the I_INTTYPES symbol,
1837 and indicates whether a C program should include <inttypes.h>.
1839 i_limits (i_limits.U):
1840 This variable conditionally defines the I_LIMITS symbol, and indicates
1841 whether a C program may include <limits.h> to get symbols like WORD_BIT
1844 i_locale (i_locale.U):
1845 This variable conditionally defines the I_LOCALE symbol,
1846 and indicates whether a C program should include <locale.h>.
1848 i_machcthr (i_machcthr.U):
1849 This variable conditionally defines the I_MACH_CTHREADS symbol,
1850 and indicates whether a C program should include <mach/cthreads.h>.
1852 i_malloc (i_malloc.U):
1853 This variable conditionally defines the I_MALLOC symbol, and indicates
1854 whether a C program should include <malloc.h>.
1857 This variable conditionally defines the I_MATH symbol, and indicates
1858 whether a C program may include <math.h>.
1860 i_memory (i_memory.U):
1861 This variable conditionally defines the I_MEMORY symbol, and indicates
1862 whether a C program should include <memory.h>.
1864 i_mntent (i_mntent.U):
1865 This variable conditionally defines the I_MNTENT symbol, and indicates
1866 whether a C program should include <mntent.h>.
1869 This variable conditionally defines the I_NDBM symbol, which
1870 indicates to the C program that <ndbm.h> exists and should
1873 i_netdb (i_netdb.U):
1874 This variable conditionally defines the I_NETDB symbol, and indicates
1875 whether a C program should include <netdb.h>.
1877 i_neterrno (i_neterrno.U):
1878 This variable conditionally defines the I_NET_ERRNO symbol, which
1879 indicates to the C program that <net/errno.h> exists and should
1882 i_netinettcp (i_netinettcp.U):
1883 This variable conditionally defines the I_NETINET_TCP symbol,
1884 and indicates whether a C program should include <netinet/tcp.h>.
1887 This variable conditionally defines I_NETINET_IN, which indicates
1888 to the C program that it should include <netinet/in.h>. Otherwise,
1889 you may try <sys/in.h>.
1892 This variable conditionally defines the I_POLL symbol, and indicates
1893 whether a C program should include <poll.h>.
1895 i_pthread (i_pthread.U):
1896 This variable conditionally defines the I_PTHREADEAD symbol,
1897 and indicates whether a C program should include <pthread.h>.
1900 This variable conditionally defines I_PWD, which indicates
1901 to the C program that it should include <pwd.h>.
1903 i_rpcsvcdbm (i_dbm.U):
1904 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1905 indicates to the C program that <rpcsvc/dbm.h> exists and should
1906 be included. Some System V systems might need this instead of <dbm.h>.
1909 This variable conditionally defines the I_SFIO symbol,
1910 and indicates whether a C program should include <sfio.h>.
1912 i_sgtty (i_termio.U):
1913 This variable conditionally defines the I_SGTTY symbol, which
1914 indicates to the C program that it should include <sgtty.h> rather
1917 i_shadow (i_shadow.U):
1918 This variable conditionally defines the I_SHADOW symbol, and indicates
1919 whether a C program should include <shadow.h>.
1921 i_socks (i_socks.U):
1922 This variable conditionally defines the I_SOCKS symbol, and indicates
1923 whether a C program should include <socks.h>.
1925 i_stdarg (i_varhdr.U):
1926 This variable conditionally defines the I_STDARG symbol, which
1927 indicates to the C program that <stdarg.h> exists and should
1930 i_stddef (i_stddef.U):
1931 This variable conditionally defines the I_STDDEF symbol, which
1932 indicates to the C program that <stddef.h> exists and should
1935 i_stdlib (i_stdlib.U):
1936 This variable conditionally defines the I_STDLIB symbol, which
1937 indicates to the C program that <stdlib.h> exists and should
1940 i_string (i_string.U):
1941 This variable conditionally defines the I_STRING symbol, which
1942 indicates that <string.h> should be included rather than <strings.h>.
1944 i_sysaccess (i_sysaccess.U):
1945 This variable conditionally defines the I_SYS_ACCESS symbol,
1946 and indicates whether a C program should include <sys/access.h>.
1948 i_sysdir (i_sysdir.U):
1949 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1950 whether a C program should include <sys/dir.h>.
1952 i_sysfile (i_sysfile.U):
1953 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1954 whether a C program should include <sys/file.h> to get R_OK and friends.
1956 i_sysfilio (i_sysioctl.U):
1957 This variable conditionally defines the I_SYS_FILIO symbol, which
1958 indicates to the C program that <sys/filio.h> exists and should
1959 be included in preference to <sys/ioctl.h>.
1962 This variable conditionally defines I_SYS_IN, which indicates
1963 to the C program that it should include <sys/in.h> instead of
1966 i_sysioctl (i_sysioctl.U):
1967 This variable conditionally defines the I_SYS_IOCTL symbol, which
1968 indicates to the C program that <sys/ioctl.h> exists and should
1971 i_sysmman (i_sysmman.U):
1972 This variable conditionally defines the I_SYS_MMAN symbol, and
1973 indicates whether a C program should include <sys/mman.h>.
1975 i_sysmount (i_sysmount.U):
1976 This variable conditionally defines the I_SYSMOUNT symbol,
1977 and indicates whether a C program should include <sys/mount.h>.
1979 i_sysndir (i_sysndir.U):
1980 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1981 whether a C program should include <sys/ndir.h>.
1983 i_sysparam (i_sysparam.U):
1984 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1985 whether a C program should include <sys/param.h>.
1987 i_sysresrc (i_sysresrc.U):
1988 This variable conditionally defines the I_SYS_RESOURCE symbol,
1989 and indicates whether a C program should include <sys/resource.h>.
1991 i_syssecrt (i_syssecrt.U):
1992 This variable conditionally defines the I_SYS_SECURITY symbol,
1993 and indicates whether a C program should include <sys/security.h>.
1995 i_sysselct (i_sysselct.U):
1996 This variable conditionally defines I_SYS_SELECT, which indicates
1997 to the C program that it should include <sys/select.h> in order to
1998 get the definition of struct timeval.
2000 i_syssockio (i_sysioctl.U):
2001 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2002 C program that socket ioctl codes may be found in <sys/sockio.h>
2003 instead of <sys/ioctl.h>.
2005 i_sysstat (i_sysstat.U):
2006 This variable conditionally defines the I_SYS_STAT symbol,
2007 and indicates whether a C program should include <sys/stat.h>.
2009 i_sysstatvfs (i_sysstatvfs.U):
2010 This variable conditionally defines the I_SYSSTATVFS symbol,
2011 and indicates whether a C program should include <sys/statvfs.h>.
2013 i_systime (i_time.U):
2014 This variable conditionally defines I_SYS_TIME, which indicates
2015 to the C program that it should include <sys/time.h>.
2017 i_systimek (i_time.U):
2018 This variable conditionally defines I_SYS_TIME_KERNEL, which
2019 indicates to the C program that it should include <sys/time.h>
2020 with KERNEL defined.
2022 i_systimes (i_systimes.U):
2023 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2024 whether a C program should include <sys/times.h>.
2026 i_systypes (i_systypes.U):
2027 This variable conditionally defines the I_SYS_TYPES symbol,
2028 and indicates whether a C program should include <sys/types.h>.
2030 i_sysuio (i_sysuio.U):
2031 This variable conditionally defines the I_SYSUIO symbol, and indicates
2032 whether a C program should include <sys/uio.h>.
2034 i_sysun (i_sysun.U):
2035 This variable conditionally defines I_SYS_UN, which indicates
2036 to the C program that it should include <sys/un.h> to get UNIX
2037 domain socket definitions.
2039 i_syswait (i_syswait.U):
2040 This variable conditionally defines I_SYS_WAIT, which indicates
2041 to the C program that it should include <sys/wait.h>.
2043 i_termio (i_termio.U):
2044 This variable conditionally defines the I_TERMIO symbol, which
2045 indicates to the C program that it should include <termio.h> rather
2048 i_termios (i_termio.U):
2049 This variable conditionally defines the I_TERMIOS symbol, which
2050 indicates to the C program that the POSIX <termios.h> file is
2054 This variable conditionally defines I_TIME, which indicates
2055 to the C program that it should include <time.h>.
2057 i_unistd (i_unistd.U):
2058 This variable conditionally defines the I_UNISTD symbol, and indicates
2059 whether a C program should include <unistd.h>.
2061 i_utime (i_utime.U):
2062 This variable conditionally defines the I_UTIME symbol, and indicates
2063 whether a C program should include <utime.h>.
2065 i_values (i_values.U):
2066 This variable conditionally defines the I_VALUES symbol, and indicates
2067 whether a C program may include <values.h> to get symbols like MAXLONG
2070 i_varargs (i_varhdr.U):
2071 This variable conditionally defines I_VARARGS, which indicates
2072 to the C program that it should include <varargs.h>.
2074 i_varhdr (i_varhdr.U):
2075 Contains the name of the header to be included to get va_dcl definition.
2076 Typically one of varargs.h or stdarg.h.
2078 i_vfork (i_vfork.U):
2079 This variable conditionally defines the I_VFORK symbol, and indicates
2080 whether a C program should include vfork.h.
2082 ignore_versioned_solibs (libs.U):
2083 This variable should be non-empty if non-versioned shared
2084 libraries (libfoo.so.x.y) are to be ignored (because they
2085 cannot be linked against).
2088 This variable must preceed the normal include path to get hte
2089 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2090 Value can be "" or "/bsd43" on mips.
2093 This variable is defined but not used by Configure.
2094 The value is a plain '' and is not useful.
2096 installarchlib (archlib.U):
2097 This variable is really the same as archlibexp but may differ on
2098 those systems using AFS. For extra portability, only this variable
2099 should be used in makefiles.
2102 This variable is the same as binexp unless AFS is running in which case
2103 the user is explicitely prompted for it. This variable should always
2104 be used in your makefiles for maximum portability.
2106 installman1dir (man1dir.U):
2107 This variable is really the same as man1direxp, unless you are using
2108 AFS in which case it points to the read/write location whereas
2109 man1direxp only points to the read-only access location. For extra
2110 portability, you should only use this variable within your makefiles.
2112 installman3dir (man3dir.U):
2113 This variable is really the same as man3direxp, unless you are using
2114 AFS in which case it points to the read/write location whereas
2115 man3direxp only points to the read-only access location. For extra
2116 portability, you should only use this variable within your makefiles.
2118 installprivlib (privlib.U):
2119 This variable is really the same as privlibexp but may differ on
2120 those systems using AFS. For extra portability, only this variable
2121 should be used in makefiles.
2123 installscript (scriptdir.U):
2124 This variable is usually the same as scriptdirexp, unless you are on
2125 a system running AFS, in which case they may differ slightly. You
2126 should always use this variable within your makefiles for portability.
2128 installsitearch (sitearch.U):
2129 This variable is really the same as sitearchexp but may differ on
2130 those systems using AFS. For extra portability, only this variable
2131 should be used in makefiles.
2133 installsitelib (sitelib.U):
2134 This variable is really the same as sitelibexp but may differ on
2135 those systems using AFS. For extra portability, only this variable
2136 should be used in makefiles.
2138 installusrbinperl (instubperl.U):
2139 This variable tells whether Perl should be installed also as
2140 /usr/bin/perl in addition to
2143 intsize (intsize.U):
2144 This variable contains the value of the INTSIZE symbol, which
2145 indicates to the C program how many bytes there are in an int.
2147 known_extensions (Extensions.U):
2148 This variable holds a list of all XS extensions included in
2152 This variable is defined but not used by Configure.
2153 The value is a plain '' and is not useful.
2156 This variable contains a flag which will tell the C compiler and loader
2157 to produce a program running with a large memory model. It is up to
2158 the Makefile to use this.
2161 This variable indicates the program to be used to link
2162 libraries for dynamic loading. On some systems, it is 'ld'.
2163 On ELF systems, it should be $cc. Mostly, we'll try to respect
2164 the hint file setting.
2166 lddlflags (dlsrc.U):
2167 This variable contains any special flags that might need to be
2168 passed to $ld to create a shared library suitable for dynamic
2169 loading. It is up to the makefile to use it. For hpux, it
2170 should be '-b'. For sunos 4.1, it is empty.
2172 ldflags (ccflags.U):
2173 This variable contains any additional C loader flags desired by
2174 the user. It is up to the Makefile to use this.
2177 This variable is be used internally by Configure to determine the
2178 full pathname (if any) of the less program. After Configure runs,
2179 the value is reset to a plain "less" and is not useful.
2182 This is an old synonym for _a.
2185 This variable contains the location of the C library.
2187 libperl (libperl.U):
2188 The perl executable is obtained by linking perlmain.c with
2189 libperl, any static extensions (usually just DynaLoader),
2190 and any other libraries needed on this system. libperl
2191 is usually libperl.a, but can also be libperl.so.xxx if
2192 the user wishes to build a perl executable with a shared
2196 This variable holds the general path (space-separated) used to find
2197 libraries. It is intended to be used by other units.
2200 This variable holds the additional libraries we want to use.
2201 It is up to the Makefile to deal with it.
2203 libswanted (Myinit.U):
2204 This variable holds a list of all the libraries we want to
2205 search. The order is chosen to pick up the c library
2206 ahead of ucb or bsd libraries for SVR4.
2209 This variable is defined but not used by Configure.
2210 The value is a plain '' and is not useful.
2213 This variable is defined but not used by Configure.
2214 The value is a plain '' and is not useful.
2216 lkflags (ccflags.U):
2217 This variable contains any additional C partial linker flags desired by
2218 the user. It is up to the Makefile to use this.
2221 This variable is be used internally by Configure to determine the
2222 full pathname (if any) of the ln program. After Configure runs,
2223 the value is reset to a plain "ln" and is not useful.
2226 This variable holds the name of the command to make
2227 symbolic links (if they are supported). It can be used
2228 in the Makefile. It is either 'ln -s' or 'ln'
2230 locincpth (ccflags.U):
2231 This variable contains a list of additional directories to be
2232 searched by the compiler. The appropriate '-I' directives will
2233 be added to ccflags. This is intended to simplify setting
2234 local directories from the Configure command line.
2235 It's not much, but it parallels the loclibpth stuff in libpth.U.
2237 loclibpth (libpth.U):
2238 This variable holds the paths (space-separated) used to find local
2239 libraries. It is prepended to libpth, and is intended to be easily
2240 set from the command line.
2242 longdblsize (d_longdbl.U):
2243 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2244 indicates to the C program how many bytes there are in a long double,
2245 if this system supports long doubles.
2247 longlongsize (d_longlong.U):
2248 This variable contains the value of the LONGLONGSIZE symbol, which
2249 indicates to the C program how many bytes there are in a long long,
2250 if this system supports long long.
2252 longsize (intsize.U):
2253 This variable contains the value of the LONGSIZE symbol, which
2254 indicates to the C program how many bytes there are in a long.
2257 This variable is defined but not used by Configure.
2258 The value is a plain '' and is not useful.
2261 This variable is defined but not used by Configure.
2262 The value is a plain '' and is not useful.
2265 This variable is be used internally by Configure to determine the
2266 full pathname (if any) of the ls program. After Configure runs,
2267 the value is reset to a plain "ls" and is not useful.
2269 lseeksize (lseektype.U):
2270 This variable defines lseektype to be something like off_t, long,
2271 or whatever type is used to declare lseek offset's type in the
2272 kernel (which also appears to be lseek's return type).
2274 lseektype (lseektype.U):
2275 This variable defines lseektype to be something like off_t, long,
2276 or whatever type is used to declare lseek offset's type in the
2277 kernel (which also appears to be lseek's return type).
2280 This variable is defined but not used by Configure.
2281 The value is a plain '' and is not useful.
2284 This variable is defined but not used by Configure.
2285 The value is a plain '' and is not useful.
2288 This variable is be used internally by Configure to determine the
2289 full pathname (if any) of the make program. After Configure runs,
2290 the value is reset to a plain "make" and is not useful.
2292 make_set_make (make.U):
2293 Some versions of 'make' set the variable MAKE. Others do not.
2294 This variable contains the string to be included in Makefile.SH
2295 so that MAKE is set if needed, and not if not needed.
2296 Possible values are:
2297 make_set_make='#' # If your make program handles this for you,
2298 make_set_make="MAKE=$make" # if it doesn't.
2299 I used a comment character so that we can distinguish a
2300 'set' value (from a previous config.sh or Configure '-D' option)
2301 from an uncomputed value.
2303 mallocobj (mallocsrc.U):
2304 This variable contains the name of the malloc.o that this package
2305 generates, if that malloc.o is preferred over the system malloc.
2306 Otherwise the value is null. This variable is intended for generating
2307 Makefiles. See mallocsrc.
2309 mallocsrc (mallocsrc.U):
2310 This variable contains the name of the malloc.c that comes with
2311 the package, if that malloc.c is preferred over the system malloc.
2312 Otherwise the value is null. This variable is intended for generating
2315 malloctype (mallocsrc.U):
2316 This variable contains the kind of ptr returned by malloc and realloc.
2318 man1dir (man1dir.U):
2319 This variable contains the name of the directory in which manual
2320 source pages are to be put. It is the responsibility of the
2321 Makefile.SH to get the value of this into the proper command.
2322 You must be prepared to do the ~name expansion yourself.
2324 man1direxp (man1dir.U):
2325 This variable is the same as the man1dir variable, but is filename
2326 expanded at configuration time, for convenient use in makefiles.
2328 man1ext (man1dir.U):
2329 This variable contains the extension that the manual page should
2330 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2333 man3dir (man3dir.U):
2334 This variable contains the name of the directory in which manual
2335 source pages are to be put. It is the responsibility of the
2336 Makefile.SH to get the value of this into the proper command.
2337 You must be prepared to do the ~name expansion yourself.
2339 man3direxp (man3dir.U):
2340 This variable is the same as the man3dir variable, but is filename
2341 expanded at configuration time, for convenient use in makefiles.
2343 man3ext (man3dir.U):
2344 This variable contains the extension that the manual page should
2345 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2349 This variable is be used internally by Configure to determine the
2350 full pathname (if any) of the Mcc program. After Configure runs,
2351 the value is reset to a plain "Mcc" and is not useful.
2354 This variable contains a flag which will tell the C compiler and loader
2355 to produce a program running with a medium memory model. If the
2356 medium model is not supported, contains the flag to produce large
2357 model programs. It is up to the Makefile to use this.
2359 mips_type (usrinc.U):
2360 This variable holds the environment type for the mips system.
2361 Possible values are "BSD 4.3" and "System V".
2364 This variable is be used internally by Configure to determine the
2365 full pathname (if any) of the mkdir program. After Configure runs,
2366 the value is reset to a plain "mkdir" and is not useful.
2368 mmaptype (d_mmap.U):
2369 This symbol contains the type of pointer returned by mmap()
2370 (and simultaneously the type of the first argument).
2371 It can be 'void *' or 'caddr_t'.
2374 This variable contains the list of memory models supported by this
2375 system. Possible component values are none, split, unsplit, small,
2376 medium, large, and huge. The component values are space separated.
2378 modetype (modetype.U):
2379 This variable defines modetype to be something like mode_t,
2380 int, unsigned short, or whatever type is used to declare file
2381 modes for system calls.
2384 This variable is be used internally by Configure to determine the
2385 full pathname (if any) of the more program. After Configure runs,
2386 the value is reset to a plain "more" and is not useful.
2388 multiarch (multiarch.U):
2389 This variable conditionally defines the MULTIARCH symbol
2390 which signifies the presence of multiplatform files.
2391 This is normally set by hints files.
2394 This variable is defined but not used by Configure.
2395 The value is a plain '' and is not useful.
2397 myarchname (archname.U):
2398 This variable holds the architecture name computed by Configure in
2399 a previous run. It is not intended to be perused by any user and
2400 should never be set in a hint file.
2402 mydomain (myhostname.U):
2403 This variable contains the eventual value of the MYDOMAIN symbol,
2404 which is the domain of the host the program is going to run on.
2405 The domain must be appended to myhostname to form a complete host name.
2406 The dot comes with mydomain, and need not be supplied by the program.
2408 myhostname (myhostname.U):
2409 This variable contains the eventual value of the MYHOSTNAME symbol,
2410 which is the name of the host the program is going to run on.
2411 The domain is not kept with hostname, but must be gotten from mydomain.
2412 The dot comes with mydomain, and need not be supplied by the program.
2414 myuname (Oldconfig.U):
2415 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2416 pseudo variables assignments in the output are stripped, thank you. The
2417 whole thing is then lower-cased.
2420 This variable contains the '-n' flag if that is what causes the echo
2421 command to suppress newline. Otherwise it is null. Correct usage is
2422 $echo $n "prompt for a question: $c".
2424 netdb_hlen_type (netdbtype.U):
2425 This variable holds the type used for the 2nd argument to
2426 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2427 This is only useful if you have gethostbyaddr(), naturally.
2429 netdb_host_type (netdbtype.U):
2430 This variable holds the type used for the 1st argument to
2431 gethostbyaddr(). Usually, this is char * or void *, possibly
2432 with or without a const prefix.
2433 This is only useful if you have gethostbyaddr(), naturally.
2435 netdb_name_type (netdbtype.U):
2436 This variable holds the type used for the argument to
2437 gethostbyname(). Usually, this is char * or const char *.
2438 This is only useful if you have gethostbyname(), naturally.
2440 netdb_net_type (netdbtype.U):
2441 This variable holds the type used for the 1st argument to
2442 getnetbyaddr(). Usually, this is int or long.
2443 This is only useful if you have getnetbyaddr(), naturally.
2446 This variable is be used internally by Configure to determine the
2447 full pathname (if any) of the nm program. After Configure runs,
2448 the value is reset to a plain "nm" and is not useful.
2451 This variable holds the options that may be necessary for nm.
2453 nm_so_opt (usenm.U):
2454 This variable holds the options that may be necessary for nm
2455 to work on a shared library but that can not be used on an
2456 archive library. Currently, this is only used by Linux, where
2457 nm --dynamic is *required* to get symbols from an ELF library which
2458 has been stripped, but nm --dynamic is *fatal* on an archive library.
2459 Maybe Linux should just always set usenm=false.
2461 nonxs_ext (Extensions.U):
2462 This variable holds a list of all non-xs extensions included
2463 in the package. All of them will be built.
2466 This variable is be used internally by Configure to determine the
2467 full pathname (if any) of the nroff program. After Configure runs,
2468 the value is reset to a plain "nroff" and is not useful.
2470 o_nonblock (nblock_io.U):
2471 This variable bears the symbol value to be used during open() or fcntl()
2472 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2473 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2474 but that is only supported by some devices.
2477 This is an old synonym for _o.
2479 old_pthread_create_joinable (d_pthrattrj.U):
2480 This variable defines the constant to use for creating joinable
2481 (aka undetached) pthreads. Unused if pthread.h defines
2482 PTHREAD_CREATE_JOINABLE. If used, possible values are
2483 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2485 optimize (ccflags.U):
2486 This variable contains any optimizer/debugger flag that should be used.
2487 It is up to the Makefile to use it.
2489 orderlib (orderlib.U):
2490 This variable is "true" if the components of libraries must be ordered
2491 (with `lorder $* | tsort`) before placing them in an archive. Set to
2492 "false" if ranlib or ar can generate random libraries.
2494 osname (Oldconfig.U):
2495 This variable contains the operating system name (e.g. sunos,
2496 solaris, hpux, etc.). It can be useful later on for setting
2497 defaults. Any spaces are replaced with underscores. It is set
2498 to a null string if we can't figure it out.
2500 osvers (Oldconfig.U):
2501 This variable contains the operating system version (e.g.
2502 4.1.3, 5.2, etc.). It is primarily used for helping select
2503 an appropriate hints file, but might be useful elsewhere for
2504 setting defaults. It is set to '' if we can't figure it out.
2505 We try to be flexible about how much of the version number
2506 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2507 same for this package, hints files might just be os_4.0 or
2508 os_4.1, etc., not keeping separate files for each little release.
2510 package (package.U):
2511 This variable contains the name of the package being constructed.
2512 It is primarily intended for the use of later Configure units.
2515 This variable contains the name of the preferred pager on the system.
2516 Usual values are (the full pathnames of) more, less, pg, or cat.
2519 This variable contains a command that produces the text of the
2520 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2521 "ypcat passwd" when NIS is used.
2523 patchlevel (patchlevel.U):
2524 The patchlevel level of this package.
2525 The value of patchlevel comes from the patchlevel.h file.
2528 This is an old synonym for p_ in Head.U, the character
2529 used to separate elements in the command shell search PATH.
2532 This variable is defined but not used by Configure.
2533 The value is a plain '' and is not useful.
2535 perladmin (perladmin.U):
2536 Electronic mail address of the perl5 administrator.
2538 perlpath (perlpath.U):
2539 This variable contains the eventual value of the PERLPATH symbol,
2540 which contains the name of the perl interpreter to be used in
2541 shell scripts and in the "eval 'exec'" idiom.
2544 This variable is be used internally by Configure to determine the
2545 full pathname (if any) of the pg program. After Configure runs,
2546 the value is reset to a plain "pg" and is not useful.
2548 phostname (myhostname.U):
2549 This variable contains the eventual value of the PHOSTNAME symbol,
2550 which is a command that can be fed to popen() to get the host name.
2551 The program should probably not presume that the domain is or isn't
2554 pidtype (pidtype.U):
2555 This variable defines PIDTYPE to be something like pid_t, int,
2556 ushort, or whatever type is used to declare process ids in the kernel.
2559 Holds the private path used by Configure to find out the libraries.
2560 Its value is prepend to libpth. This variable takes care of special
2561 machines, like the mips. Usually, it should be empty.
2564 This variable is defined but not used by Configure.
2565 The value is a plain '' and is not useful.
2568 This variable is defined but not used by Configure.
2569 The value is a plain '' and is not useful.
2572 This variable holds the name of the directory below which the
2573 user will install the package. Usually, this is /usr/local, and
2574 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2575 man pages in /usr/local/man, etc. It is only used to set defaults
2576 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2578 prefixexp (prefix.U):
2579 This variable holds the full absolute path of the directory below
2580 which the user will install the package. Derived from prefix.
2582 privlib (privlib.U):
2583 This variable contains the eventual value of the PRIVLIB symbol,
2584 which is the name of the private library for this package. It may
2585 have a ~ on the front. It is up to the makefile to eventually create
2586 this directory while performing installation (with ~ substitution).
2588 privlibexp (privlib.U):
2589 This variable is the ~name expanded version of privlib, so that you
2590 may use it directly in Makefiles or shell scripts.
2592 prototype (prototype.U):
2593 This variable holds the eventual value of CAN_PROTOTYPE, which
2594 indicates the C compiler can handle funciton prototypes.
2596 ptrsize (ptrsize.U):
2597 This variable contains the value of the PTRSIZE symbol, which
2598 indicates to the C program how many bytes there are in a pointer.
2600 randbits (randfunc.U):
2601 Indicates how many bits are produced by the function used to
2602 generate normalized random numbers.
2604 randfunc (randfunc.U):
2605 Indicates the name of the random number function to use.
2606 Values include drand48, random, and rand. In C programs,
2607 the 'Drand01' macro is defined to generate uniformly distributed
2608 random numbers over the range [0., 1.[ (see drand01 and nrand).
2610 randseedtype (randfunc.U):
2611 Indicates the type of the argument of the seedfunc.
2613 ranlib (orderlib.U):
2614 This variable is set to the pathname of the ranlib program, if it is
2615 needed to generate random libraries. Set to ":" if ar can generate
2616 random libraries or if random libraries are not supported
2618 rd_nodata (nblock_io.U):
2619 This variable holds the return code from read() when no data is
2620 present. It should be -1, but some systems return 0 when O_NDELAY is
2621 used, which is a shame because you cannot make the difference between
2622 no data and an EOF.. Sigh!
2625 This variable is be used internally by Configure to determine the
2626 full pathname (if any) of the rm program. After Configure runs,
2627 the value is reset to a plain "rm" and is not useful.
2630 This variable is defined but not used by Configure.
2631 The value is a plain '' and is not useful.
2634 This variable contains 'true' or 'false' depending whether the
2635 nm extraction should be performed or not, according to the value
2636 of usenm and the flags on the Configure command line.
2638 sched_yield (d_pthread_y.U):
2639 This variable defines the way to yield the execution
2640 of the current thread.
2642 scriptdir (scriptdir.U):
2643 This variable holds the name of the directory in which the user wants
2644 to put publicly scripts for the package in question. It is either
2645 the same directory as for binaries, or a special one that can be
2646 mounted across different architectures, like /usr/share. Programs
2647 must be prepared to deal with ~name expansion.
2649 scriptdirexp (scriptdir.U):
2650 This variable is the same as scriptdir, but is filename expanded
2651 at configuration time, for programs not wanting to bother with it.
2654 This variable is be used internally by Configure to determine the
2655 full pathname (if any) of the sed program. After Configure runs,
2656 the value is reset to a plain "sed" and is not useful.
2658 seedfunc (randfunc.U):
2659 Indicates the random number generating seed function.
2660 Values include srand48, srandom, and srand.
2662 selectminbits (selectminbits.U):
2663 This variable holds the minimum number of bits operated by select.
2664 That is, if you do select(n, ...), how many bits at least will be
2665 cleared in the masks if some activity is detected. Usually this
2666 is either n or 32*ceil(n/32), especially many little-endians do
2667 the latter. This is only useful if you have select(), naturally.
2669 selecttype (selecttype.U):
2670 This variable holds the type used for the 2nd, 3rd, and 4th
2671 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2672 is defined, and 'int *' otherwise. This is only useful if you
2673 have select(), naturally.
2676 This variable is defined but not used by Configure.
2677 The value is a plain '' and is not useful.
2680 This variable contains the full pathname of the shell used
2681 on this system to execute Bourne shell scripts. Usually, this will be
2682 /bin/sh, though it's possible that some systems will have /bin/ksh,
2683 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2685 This unit comes before Options.U, so you can't set sh with a '-D'
2686 option, though you can override this (and startsh)
2687 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2690 This variable is defined but not used by Configure.
2691 The value is a plain '' and is not useful.
2693 sharpbang (spitshell.U):
2694 This variable contains the string #! if this system supports that
2697 shmattype (d_shmat.U):
2698 This symbol contains the type of pointer returned by shmat().
2699 It can be 'void *' or 'char *'.
2701 shortsize (intsize.U):
2702 This variable contains the value of the SHORTSIZE symbol which
2703 indicates to the C program how many bytes there are in a short.
2705 shrpenv (libperl.U):
2706 If the user builds a shared libperl.so, then we need to tell the
2707 'perl' executable where it will be able to find the installed libperl.so.
2708 One way to do this on some systems is to set the environment variable
2709 LD_RUN_PATH to the directory that will be the final location of the
2710 shared libperl.so. The makefile can use this with something like
2711 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2713 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2716 See the main perl Makefile.SH for actual working usage.
2717 Alternatively, we might be able to use a command line option such
2718 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2719 $archlibexp/CORE (Linux).
2721 shsharp (spitshell.U):
2722 This variable tells further Configure units whether your sh can
2725 sig_count (sig_name.U):
2726 This variable holds a number larger than the largest valid
2727 signal number. This is usually the same as the NSIG macro.
2729 sig_name (sig_name.U):
2730 This variable holds the signal names, space separated. The leading
2731 SIG in signal name is removed. A ZERO is prepended to the
2732 list. This is currently not used.
2734 sig_name_init (sig_name.U):
2735 This variable holds the signal names, enclosed in double quotes and
2736 separated by commas, suitable for use in the SIG_NAME definition
2737 below. A "ZERO" is prepended to the list, and the list is
2738 terminated with a plain 0. The leading SIG in signal names
2739 is removed. See sig_num.
2741 sig_num (sig_name.U):
2742 This variable holds the signal numbers, space separated. A ZERO is
2743 prepended to the list (corresponding to the fake SIGZERO), and
2744 the list is terminated with a 0. Those numbers correspond to
2745 the value of the signal listed in the same place within the
2748 sig_num_init (sig_name.U):
2749 This variable holds the signal numbers, enclosed in double quotes and
2750 separated by commas, suitable for use in the SIG_NUM definition
2751 below. A "ZERO" is prepended to the list, and the list is
2752 terminated with a plain 0.
2754 signal_t (d_voidsig.U):
2755 This variable holds the type of the signal handler (void or int).
2757 sitearch (sitearch.U):
2758 This variable contains the eventual value of the SITEARCH symbol,
2759 which is the name of the private library for this package. It may
2760 have a ~ on the front. It is up to the makefile to eventually create
2761 this directory while performing installation (with ~ substitution).
2763 sitearchexp (sitearch.U):
2764 This variable is the ~name expanded version of sitearch, so that you
2765 may use it directly in Makefiles or shell scripts.
2767 sitelib (sitelib.U):
2768 This variable contains the eventual value of the SITELIB symbol,
2769 which is the name of the private library for this package. It may
2770 have a ~ on the front. It is up to the makefile to eventually create
2771 this directory while performing installation (with ~ substitution).
2773 sitelibexp (sitelib.U):
2774 This variable is the ~name expanded version of sitelib, so that you
2775 may use it directly in Makefiles or shell scripts.
2777 sizetype (sizetype.U):
2778 This variable defines sizetype to be something like size_t,
2779 unsigned long, or whatever type is used to declare length
2780 parameters for string functions.
2783 This variable is defined but not used by Configure.
2784 The value is a plain '' and is not useful.
2787 This variable is defined but not used by Configure.
2788 The value is a plain '' and is not useful.
2791 This variable contains a flag which will tell the C compiler and loader
2792 to produce a program running with a small memory model. It is up to
2793 the Makefile to use this.
2796 This variable holds the extension used to identify shared libraries
2797 (also known as shared objects) on the system. Usually set to 'so'.
2799 sockethdr (d_socket.U):
2800 This variable has any cpp '-I' flags needed for socket support.
2802 socketlib (d_socket.U):
2803 This variable has the names of any libraries needed for socket support.
2806 This variable is be used internally by Configure to determine the
2807 full pathname (if any) of the sort program. After Configure runs,
2808 the value is reset to a plain "sort" and is not useful.
2810 spackage (package.U):
2811 This variable contains the name of the package being constructed,
2812 with the first letter uppercased, i.e. suitable for starting
2815 spitshell (spitshell.U):
2816 This variable contains the command necessary to spit out a runnable
2817 shell on this system. It is either cat or a grep '-v' for # comments.
2820 This variable contains a flag which will tell the C compiler and loader
2821 to produce a program that will run in separate I and D space, for those
2822 machines that support separation of instruction and data space. It is
2823 up to the Makefile to use this.
2826 This variable holds the path to the package source. It is up to
2827 the Makefile to use this variable and set VPATH accordingly to
2828 find the sources remotely.
2830 ssizetype (ssizetype.U):
2831 This variable defines ssizetype to be something like ssize_t,
2832 long or int. It is used by functions that return a count
2833 of bytes or an error condition. It must be a signed type.
2834 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2836 startperl (startperl.U):
2837 This variable contains the string to put on the front of a perl
2838 script to make sure (hopefully) that it runs with perl and not some
2839 shell. Of course, that leading line must be followed by the classical
2841 eval 'exec perl -S $0 ${1+"$@"}'
2842 if $running_under_some_shell;
2843 to guarantee perl startup should the shell execute the script. Note
2844 that this magic incatation is not understood by csh.
2846 startsh (startsh.U):
2847 This variable contains the string to put on the front of a shell
2848 script to make sure (hopefully) that it runs with sh and not some
2851 static_ext (Extensions.U):
2852 This variable holds a list of XS extension files we want to
2853 link statically into the package. It is used by Makefile.
2855 stdchar (stdchar.U):
2856 This variable conditionally defines STDCHAR to be the type of char
2857 used in stdio.h. It has the values "unsigned char" or "char".
2859 stdio_base (d_stdstdio.U):
2860 This variable defines how, given a FILE pointer, fp, to access the
2861 _base field (or equivalent) of stdio.h's FILE structure. This will
2862 be used to define the macro FILE_base(fp).
2864 stdio_bufsiz (d_stdstdio.U):
2865 This variable defines how, given a FILE pointer, fp, to determine
2866 the number of bytes store in the I/O buffer pointer to by the
2867 _base field (or equivalent) of stdio.h's FILE structure. This will
2868 be used to define the macro FILE_bufsiz(fp).
2870 stdio_cnt (d_stdstdio.U):
2871 This variable defines how, given a FILE pointer, fp, to access the
2872 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2873 be used to define the macro FILE_cnt(fp).
2875 stdio_filbuf (d_stdstdio.U):
2876 This variable defines how, given a FILE pointer, fp, to tell
2877 stdio to refill it's internal buffers (?). This will
2878 be used to define the macro FILE_filbuf(fp).
2880 stdio_ptr (d_stdstdio.U):
2881 This variable defines how, given a FILE pointer, fp, to access the
2882 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2883 be used to define the macro FILE_ptr(fp).
2885 stdio_stream_array (stdio_streams.U):
2886 This variable tells the name of the array holding the stdio streams.
2887 Usual values include _iob, __iob, and __sF.
2889 strings (i_string.U):
2890 This variable holds the full path of the string header that will be
2891 used. Typically /usr/include/string.h or /usr/include/strings.h.
2894 This variable is defined but not used by Configure.
2895 The value is a plain '' and is not useful.
2897 subversion (patchlevel.U):
2898 The subversion level of this package.
2899 The value of subversion comes from the patchlevel.h file.
2900 This is unique to perl.
2903 This variable holds the place where the manual is located on this
2904 system. It is not the place where the user wants to put his manual
2905 pages. Rather it is the place where Configure may look to find manual
2906 for unix commands (section 1 of the manual usually). See mansrc.
2909 This variable is defined but not used by Configure.
2910 The value is a plain '' and is not useful.
2913 This variable is defined but not used by Configure.
2914 The value is a plain '' and is not useful.
2917 This variable is defined but not used by Configure.
2918 The value is a plain '' and is not useful.
2921 This variable is defined but not used by Configure.
2922 The value is a plain '' and is not useful.
2925 This variable is be used internally by Configure to determine the
2926 full pathname (if any) of the test program. After Configure runs,
2927 the value is reset to a plain "test" and is not useful.
2929 timeincl (i_time.U):
2930 This variable holds the full path of the included time header(s).
2932 timetype (d_time.U):
2933 This variable holds the type returned by time(). It can be long,
2934 or time_t on BSD sites (in which case <sys/types.h> should be
2935 included). Anyway, the type Time_t should be used.
2938 This variable is be used internally by Configure to determine the
2939 full pathname (if any) of the touch program. After Configure runs,
2940 the value is reset to a plain "touch" and is not useful.
2943 This variable is be used internally by Configure to determine the
2944 full pathname (if any) of the tr program. After Configure runs,
2945 the value is reset to a plain "tr" and is not useful.
2948 This variable contains the value to be passed to the tr(1)
2949 command to transliterate a newline. Typical values are
2950 '\012' and '\n'. This is needed for EBCDIC systems where
2951 newline is not necessarily '\012'.
2954 This variable is defined but not used by Configure.
2955 The value is a plain '' and is not useful.
2957 uidtype (uidtype.U):
2958 This variable defines Uid_t to be something like uid_t, int,
2959 ushort, or whatever type is used to declare user ids in the kernel.
2962 This variable is be used internally by Configure to determine the
2963 full pathname (if any) of the uname program. After Configure runs,
2964 the value is reset to a plain "uname" and is not useful.
2967 This variable is be used internally by Configure to determine the
2968 full pathname (if any) of the uniq program. After Configure runs,
2969 the value is reset to a plain "uniq" and is not useful.
2971 use64bits (use64bits.U):
2972 This variable conditionally defines the USE_64_BITS symbol,
2973 and indicates that explicit 64-bit interfaces should be used
2977 This variable indicates if the the system supports dynamic
2978 loading of some sort. See also dlsrc and dlobj.
2980 usemultiplicity (usemultiplicity.U):
2981 This variable conditionally defines the MULTIPLICITY symbol,
2982 and indicates that Perl should be built to use multiplicity.
2984 usemymalloc (mallocsrc.U):
2985 This variable contains y if the malloc that comes with this package
2986 is desired over the system's version of malloc. People often include
2987 special versions of malloc for effiency, but such versions are often
2988 less portable. See also mallocsrc and mallocobj.
2989 If this is 'y', then -lmalloc is removed from $libs.
2992 This variable contains 'true' or 'false' depending whether the
2993 nm extraction is wanted or not.
2995 useopcode (Extensions.U):
2996 This variable holds either 'true' or 'false' to indicate
2997 whether the Opcode extension should be used. The sole
2998 use for this currently is to allow an easy mechanism
2999 for users to skip the Opcode extension from the Configure
3002 useperlio (useperlio.U):
3003 This variable conditionally defines the USE_PERLIO symbol,
3004 and indicates that the PerlIO abstraction should be
3007 useposix (Extensions.U):
3008 This variable holds either 'true' or 'false' to indicate
3009 whether the POSIX extension should be used. The sole
3010 use for this currently is to allow an easy mechanism
3011 for hints files to indicate that POSIX will not compile
3012 on a particular system.
3015 This variable is set to true when the user agrees to use sfio.
3016 It is set to false when sfio is not available or when the user
3017 explicitely requests not to use sfio. It is here primarily so
3018 that command-line settings can override the auto-detection of
3019 d_sfio without running into a "WHOA THERE".
3021 useshrplib (libperl.U):
3022 This variable is set to 'yes' if the user wishes
3023 to build a shared libperl, and 'no' otherwise.
3025 usesocks (usesocks.U):
3026 This variable conditionally defines the USE_SOCKS symbol,
3027 and indicates that Perl should be built to use SOCKS.
3029 usethreads (usethreads.U):
3030 This variable conditionally defines the USE_THREADS symbol,
3031 and indicates that Perl should be built to use threads.
3033 usevfork (d_vfork.U):
3034 This variable is set to true when the user accepts to use vfork.
3035 It is set to false when no vfork is available or when the user
3036 explicitely requests not to use vfork.
3039 This variable holds the path of the include files, which is
3040 usually /usr/include. It is mainly used by other Configure units.
3043 This variable is defined but not used by Configure.
3044 The value is a plain '' and is not useful.
3046 version (patchlevel.U):
3047 The full version number of this package. This combines
3048 baserev, patchlevel, and subversion to get the full
3049 version number, including any possible subversions. Care
3050 is taken to use the C locale in order to get something
3051 like 5.004 instead of 5,004. This is unique to perl.
3054 This variable is defined but not used by Configure.
3055 The value is a plain '' and is not useful.
3057 voidflags (voidflags.U):
3058 This variable contains the eventual value of the VOIDFLAGS symbol,
3059 which indicates how much support of the void type is given by this
3060 compiler. See VOIDFLAGS for more info.
3063 This variable holds extra path (space-separated) used to find
3064 libraries on this platform, for example CPU-specific libraries
3065 (on multi-CPU platforms) may be listed here.
3068 This variable is defined but not used by Configure.
3069 The value is a plain '' and is not useful.
3072 This variable is be used internally by Configure to determine the
3073 full pathname (if any) of the zip program. After Configure runs,
3074 the value is reset to a plain "zip" and is not useful.