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_eofnblk (nblock_io.U):
466 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
467 when reading from a non-blocking I/O source.
470 This variable conditionally defines the symbols EUNICE and VAX, which
471 alerts the C program that it must deal with ideosyncracies of VMS.
473 d_fchmod (d_fchmod.U):
474 This variable conditionally defines the HAS_FCHMOD symbol, which
475 indicates to the C program that the fchmod() routine is available
476 to change mode of opened files.
478 d_fchown (d_fchown.U):
479 This variable conditionally defines the HAS_FCHOWN symbol, which
480 indicates to the C program that the fchown() routine is available
481 to change ownership of opened files.
484 This variable conditionally defines the HAS_FCNTL symbol, and indicates
485 whether the fcntl() function exists
487 d_fd_macros (d_fd_set.U):
488 This variable contains the eventual value of the HAS_FD_MACROS symbol,
489 which indicates if your C compiler knows about the macros which
490 manipulate an fd_set.
492 d_fd_set (d_fd_set.U):
493 This variable contains the eventual value of the HAS_FD_SET symbol,
494 which indicates if your C compiler knows about the fd_set typedef.
496 d_fds_bits (d_fd_set.U):
497 This variable contains the eventual value of the HAS_FDS_BITS symbol,
498 which indicates if your fd_set typedef contains the fds_bits member.
499 If you have an fd_set typedef, but the dweebs who installed it did
500 a half-fast job and neglected to provide the macros to manipulate
501 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
504 This variable conditionally defines the HAS_FETCH64 symbol, which
505 indicates to the C program that the fetch64() routine is available.
507 d_fgetpos64 (stdio64.U):
508 This variable conditionally defines the HAS_FGETPOS64 symbol, which
509 indicates to the C program that the fgetpos64() routine is available.
511 d_fgetpos (d_fgetpos.U):
512 This variable conditionally defines HAS_FGETPOS if fgetpos() is
513 available to get the file position indicator.
515 d_firstkey64 (dbm64.U):
516 This variable conditionally defines the HAS_FIRSTKEY64 symbol, which
517 indicates to the C program that the firstkey64() routine is available.
519 d_flexfnam (d_flexfnam.U):
520 This variable conditionally defines the FLEXFILENAMES symbol, which
521 indicates that the system supports filenames longer than 14 characters.
523 d_flock64_s (io64.U):
524 This symbol will be defined if the C compiler supports struct flock64.
527 This variable conditionally defines HAS_FLOCK if flock() is
528 available to do file locking.
530 d_fopen64 (stdio64.U):
531 This variable conditionally defines the HAS_FOPEN64 symbol, which
532 indicates to the C program that the fopen64() routine is available.
535 This variable conditionally defines the HAS_FORK symbol, which
536 indicates to the C program that the fork() routine is available.
538 d_fpathconf (d_pathconf.U):
539 This variable conditionally defines the HAS_FPATHCONF symbol, which
540 indicates to the C program that the pathconf() routine is available
541 to determine file-system related limits and options associated
542 with a given open file descriptor.
544 d_freopen64 (stdio64.U):
545 This variable conditionally defines the HAS_FREOPEN64 symbol, which
546 indicates to the C program that the freopen64() routine is available.
548 d_fseek64 (stdio64.U):
549 This variable conditionally defines the HAS_FSEEK64 symbol, which
550 indicates to the C program that the fseek64() routine is available.
552 d_fseeko64 (stdio64.U):
553 This variable conditionally defines the HAS_FSEEKO64 symbol, which
554 indicates to the C program that the fseeko64() routine is available.
556 d_fseeko (d_fseeko.U):
557 This variable conditionally defines the HAS_FSEEKO symbol, which
558 indicates to the C program that the fseeko() routine is available.
560 d_fsetpos64 (stdio64.U):
561 This variable conditionally defines the HAS_FSETPOS64 symbol, which
562 indicates to the C program that the fsetpos64() routine is available.
564 d_fsetpos (d_fsetpos.U):
565 This variable conditionally defines HAS_FSETPOS if fsetpos() is
566 available to set the file position indicator.
569 This variable conditionally defines the HAS_FSTAT64 symbol, which
570 indicates to the C program that the fstat64() routine is available.
572 d_fstatfs (d_statfs.U):
573 This variable conditionally defines the HAS_FSTATFS symbol, which
574 indicates to the C program that the fstatfs() routine is available.
576 d_fstatvfs (d_statvfs.U):
577 This variable conditionally defines the HAS_FSTATVFS symbol, which
578 indicates to the C program that the fstatvfs() routine is available.
580 d_ftell64 (stdio64.U):
581 This variable conditionally defines the HAS_FTELL64 symbol, which
582 indicates to the C program that the ftell64() routine is available.
584 d_ftello64 (stdio64.U):
585 This variable conditionally defines the HAS_FTELLO64 symbol, which
586 indicates to the C program that the ftello64() routine is available.
588 d_ftello (d_ftello.U):
589 This variable conditionally defines the HAS_FTELLO symbol, which
590 indicates to the C program that the ftello() routine is available.
593 This variable conditionally defines the HAS_FTIME symbol, which indicates
594 that the ftime() routine exists. The ftime() routine is basically
595 a sub-second accuracy clock.
597 d_ftruncate64 (io64.U):
598 This variable conditionally defines the HAS_FTRUNCATE64 symbol, which
599 indicates to the C program that the ftruncate64() routine is available.
601 d_Gconvert (d_gconvert.U):
602 This variable holds what Gconvert is defined as to convert
603 floating point numbers into strings. It could be 'gconvert'
604 or a more complex macro emulating gconvert with gcvt() or sprintf.
606 d_Gconvert='gconvert((x),(n),(t),(b))'
607 d_Gconvert='gcvt((x),(n),(b))'
608 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
610 d_getgrent (d_getgrent.U):
611 This variable conditionally defines the HAS_GETGRENT symbol, which
612 indicates to the C program that the getgrent() routine is available
613 for sequential access of the group database.
615 d_getgrps (d_getgrps.U):
616 This variable conditionally defines the HAS_GETGROUPS symbol, which
617 indicates to the C program that the getgroups() routine is available
618 to get the list of process groups.
620 d_gethbyaddr (d_gethbyad.U):
621 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
622 indicates to the C program that the gethostbyaddr() routine is available
623 to look up hosts by their IP addresses.
625 d_gethbyname (d_gethbynm.U):
626 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
627 indicates to the C program that the gethostbyname() routine is available
628 to look up host names in some data base or other.
630 d_gethent (d_gethent.U):
631 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
632 available to look up host names in some data base or another.
634 d_gethname (d_gethname.U):
635 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
636 indicates to the C program that the gethostname() routine may be
637 used to derive the host name.
639 d_gethostprotos (d_gethostprotos.U):
640 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
641 which indicates to the C program that <netdb.h> supplies
642 prototypes for the various gethost*() functions.
643 See also netdbtype.U for probing for various netdb types.
645 d_getlogin (d_getlogin.U):
646 This variable conditionally defines the HAS_GETLOGIN symbol, which
647 indicates to the C program that the getlogin() routine is available
648 to get the login name.
650 d_getmntent (d_getmntent.U):
651 This variable conditionally defines the HAS_GETMNTENT symbol, which
652 indicates to the C program that the getmntent() routine is available
653 to iterate through mounted files.
655 d_getnbyaddr (d_getnbyad.U):
656 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
657 indicates to the C program that the getnetbyaddr() routine is available
658 to look up networks by their IP addresses.
660 d_getnbyname (d_getnbynm.U):
661 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
662 indicates to the C program that the getnetbyname() routine is available
663 to look up networks by their names.
665 d_getnent (d_getnent.U):
666 This variable conditionally defines HAS_GETNETENT if getnetent() is
667 available to look up network names in some data base or another.
669 d_getnetprotos (d_getnetprotos.U):
670 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
671 which indicates to the C program that <netdb.h> supplies
672 prototypes for the various getnet*() functions.
673 See also netdbtype.U for probing for various netdb types.
675 d_getpbyname (d_getprotby.U):
676 This variable conditionally defines the HAS_GETPROTOBYNAME
677 symbol, which indicates to the C program that the
678 getprotobyname() routine is available to look up protocols
681 d_getpbynumber (d_getprotby.U):
682 This variable conditionally defines the HAS_GETPROTOBYNUMBER
683 symbol, which indicates to the C program that the
684 getprotobynumber() routine is available to look up protocols
687 d_getpent (d_getpent.U):
688 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
689 available to look up protocols in some data base or another.
691 d_getpgid (d_getpgid.U):
692 This variable conditionally defines the HAS_GETPGID symbol, which
693 indicates to the C program that the getpgid(pid) function
694 is available to get the process group id.
696 d_getpgrp2 (d_getpgrp2.U):
697 This variable conditionally defines the HAS_GETPGRP2 symbol, which
698 indicates to the C program that the getpgrp2() (as in DG/UX) routine
699 is available to get the current process group.
701 d_getpgrp (d_getpgrp.U):
702 This variable conditionally defines HAS_GETPGRP if getpgrp() is
703 available to get the current process group.
705 d_getppid (d_getppid.U):
706 This variable conditionally defines the HAS_GETPPID symbol, which
707 indicates to the C program that the getppid() routine is available
708 to get the parent process ID.
710 d_getprior (d_getprior.U):
711 This variable conditionally defines HAS_GETPRIORITY if getpriority()
712 is available to get a process's priority.
714 d_getprotoprotos (d_getprotoprotos.U):
715 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
716 which indicates to the C program that <netdb.h> supplies
717 prototypes for the various getproto*() functions.
718 See also netdbtype.U for probing for various netdb types.
720 d_getpwent (d_getpwent.U):
721 This variable conditionally defines the HAS_GETPWENT symbol, which
722 indicates to the C program that the getpwent() routine is available
723 for sequential access of the passwd database.
725 d_getsbyname (d_getsrvby.U):
726 This variable conditionally defines the HAS_GETSERVBYNAME
727 symbol, which indicates to the C program that the
728 getservbyname() routine is available to look up services
731 d_getsbyport (d_getsrvby.U):
732 This variable conditionally defines the HAS_GETSERVBYPORT
733 symbol, which indicates to the C program that the
734 getservbyport() routine is available to look up services
737 d_getsent (d_getsent.U):
738 This variable conditionally defines HAS_GETSERVENT if getservent() is
739 available to look up network services in some data base or another.
741 d_getservprotos (d_getservprotos.U):
742 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
743 which indicates to the C program that <netdb.h> supplies
744 prototypes for the various getserv*() functions.
745 See also netdbtype.U for probing for various netdb types.
747 d_gettimeod (d_ftime.U):
748 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
749 indicates that the gettimeofday() system call exists (to obtain a
750 sub-second accuracy clock). You should probably include <sys/resource.h>.
752 d_gnulibc (d_gnulibc.U):
753 Defined if we're dealing with the GNU C Library.
755 d_grpasswd (i_grp.U):
756 This variable conditionally defines GRPASSWD, which indicates
757 that struct group in <grp.h> contains gr_passwd.
759 d_hasmntopt (d_hasmntopt.U):
760 This variable conditionally defines the HAS_HASMNTOPT symbol, which
761 indicates to the C program that the hasmntopt() routine is available
762 to query the mount options of file systems.
765 This variable conditionally defines HAS_HTONL if htonl() and its
766 friends are available to do network order byte swapping.
768 d_index (d_strchr.U):
769 This variable conditionally defines HAS_INDEX if index() and
770 rindex() are available for string searching.
772 d_inetaton (d_inetaton.U):
773 This variable conditionally defines the HAS_INET_ATON symbol, which
774 indicates to the C program that the inet_aton() function is available
775 to parse IP address "dotted-quad" strings.
778 This symbol will be defined if the C compiler supports ino64_t.
780 d_int64t (i_inttypes.U):
781 This symbol will be defined if the C compiler supports int64_t.
783 d_iovec_s (i_sysuio.U):
784 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
785 which indicates that the struct iovec is supported.
787 d_isascii (d_isascii.U):
788 This variable conditionally defines the HAS_ISASCII constant,
789 which indicates to the C program that isascii() is available.
791 d_killpg (d_killpg.U):
792 This variable conditionally defines the HAS_KILLPG symbol, which
793 indicates to the C program that the killpg() routine is available
794 to kill process groups.
796 d_lchown (d_lchown.U):
797 This variable conditionally defines the HAS_LCHOWN symbol, which
798 indicates to the C program that the lchown() routine is available
799 to operate on a symbolic link (instead of following the link).
802 This variable conditionally defines HAS_LINK if link() is
803 available to create hard links.
806 This variable conditionally defines the HAS_LLSEEK symbol, which
807 indicates to the C program that the llseek() routine is available.
809 d_locconv (d_locconv.U):
810 This variable conditionally defines HAS_LOCALECONV if localeconv() is
811 available for numeric and monetary formatting conventions.
814 This variable conditionally defines the HAS_LOCKF64 symbol, which
815 indicates to the C program that the lockf64() routine is available.
818 This variable conditionally defines HAS_LOCKF if lockf() is
819 available to do file locking.
821 d_longdbl (d_longdbl.U):
822 This variable conditionally defines HAS_LONG_DOUBLE if
823 the long double type is supported.
825 d_longlong (d_longlong.U):
826 This variable conditionally defines HAS_LONG_LONG if
827 the long long type is supported.
830 This variable conditionally defines the HAS_LSEEK64 symbol, which
831 indicates to the C program that the lseek64() routine is available.
834 This variable conditionally defines the HAS_LSTAT64 symbol, which
835 indicates to the C program that the lstat64() routine is available.
838 This variable conditionally defines HAS_LSTAT if lstat() is
839 available to do file stats on symbolic links.
841 d_madvise (d_madvise.U):
842 This variable conditionally defines HAS_MADVISE if madvise() is
843 available to map a file into memory.
846 This variable conditionally defines the HAS_MBLEN symbol, which
847 indicates to the C program that the mblen() routine is available
848 to find the number of bytes in a multibye character.
850 d_mbstowcs (d_mbstowcs.U):
851 This variable conditionally defines the HAS_MBSTOWCS symbol, which
852 indicates to the C program that the mbstowcs() routine is available
853 to convert a multibyte string into a wide character string.
855 d_mbtowc (d_mbtowc.U):
856 This variable conditionally defines the HAS_MBTOWC symbol, which
857 indicates to the C program that the mbtowc() routine is available
858 to convert multibyte to a wide character.
860 d_memchr (d_memchr.U):
861 This variable conditionally defines the HAS_MEMCHR symbol, which
862 indicates to the C program that the memchr() routine is available
863 to locate characters within a C string.
865 d_memcmp (d_memcmp.U):
866 This variable conditionally defines the HAS_MEMCMP symbol, which
867 indicates to the C program that the memcmp() routine is available
868 to compare blocks of memory.
870 d_memcpy (d_memcpy.U):
871 This variable conditionally defines the HAS_MEMCPY symbol, which
872 indicates to the C program that the memcpy() routine is available
873 to copy blocks of memory.
875 d_memmove (d_memmove.U):
876 This variable conditionally defines the HAS_MEMMOVE symbol, which
877 indicates to the C program that the memmove() routine is available
878 to copy potentatially overlapping blocks of memory.
880 d_memset (d_memset.U):
881 This variable conditionally defines the HAS_MEMSET symbol, which
882 indicates to the C program that the memset() routine is available
883 to set blocks of memory.
886 This variable conditionally defines the HAS_MKDIR symbol, which
887 indicates to the C program that the mkdir() routine is available
888 to create directories..
890 d_mkfifo (d_mkfifo.U):
891 This variable conditionally defines the HAS_MKFIFO symbol, which
892 indicates to the C program that the mkfifo() routine is available.
894 d_mktime (d_mktime.U):
895 This variable conditionally defines the HAS_MKTIME symbol, which
896 indicates to the C program that the mktime() routine is available.
899 This variable conditionally defines HAS_MMAP if mmap() is
900 available to map a file into memory.
902 d_mprotect (d_mprotect.U):
903 This variable conditionally defines HAS_MPROTECT if mprotect() is
904 available to modify the access protection of a memory mapped file.
907 This variable conditionally defines the HAS_MSG symbol, which
908 indicates that the entire msg*(2) library is present.
910 d_msg_ctrunc (d_socket.U):
911 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
912 which indicates that the MSG_CTRUNC is available. #ifdef is
913 not enough because it may be an enum, glibc has been known to do this.
915 d_msg_dontroute (d_socket.U):
916 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
917 which indicates that the MSG_DONTROUTE is available. #ifdef is
918 not enough because it may be an enum, glibc has been known to do this.
920 d_msg_oob (d_socket.U):
921 This variable conditionally defines the HAS_MSG_OOB symbol,
922 which indicates that the MSG_OOB is available. #ifdef is
923 not enough because it may be an enum, glibc has been known to do this.
925 d_msg_peek (d_socket.U):
926 This variable conditionally defines the HAS_MSG_PEEK symbol,
927 which indicates that the MSG_PEEK is available. #ifdef is
928 not enough because it may be an enum, glibc has been known to do this.
930 d_msg_proxy (d_socket.U):
931 This variable conditionally defines the HAS_MSG_PROXY symbol,
932 which indicates that the MSG_PROXY is available. #ifdef is
933 not enough because it may be an enum, glibc has been known to do this.
935 d_msgctl (d_msgctl.U):
936 This variable conditionally defines the HAS_MSGCTL symbol, which
937 indicates to the C program that the msgctl() routine is available.
939 d_msgget (d_msgget.U):
940 This variable conditionally defines the HAS_MSGGET symbol, which
941 indicates to the C program that the msgget() routine is available.
943 d_msghdr_s (d_socket.U):
944 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
945 which indicates that the struct msghdr is supported.
947 d_msgrcv (d_msgrcv.U):
948 This variable conditionally defines the HAS_MSGRCV symbol, which
949 indicates to the C program that the msgrcv() routine is available.
951 d_msgsnd (d_msgsnd.U):
952 This variable conditionally defines the HAS_MSGSND symbol, which
953 indicates to the C program that the msgsnd() routine is available.
956 This variable conditionally defines HAS_MSYNC if msync() is
957 available to synchronize a mapped file.
959 d_munmap (d_munmap.U):
960 This variable conditionally defines HAS_MUNMAP if munmap() is
961 available to unmap a region mapped by mmap().
963 d_mymalloc (mallocsrc.U):
964 This variable conditionally defines MYMALLOC in case other parts
965 of the source want to take special action if MYMALLOC is used.
966 This may include different sorts of profiling or error detection.
968 d_nextkey64 (dbm64.U):
969 This variable conditionally defines the HAS_NEXTKEY64 symbol, which
970 indicates to the C program that the nextkey64() routine is available.
973 This variable conditionally defines the HAS_NICE symbol, which
974 indicates to the C program that the nice() routine is available.
977 This symbol will be defined if the C compiler supports off64_t.
980 This symbol will be defined if the C compiler supports offset_t.
982 d_old_pthread_create_joinable (d_pthrattrj.U):
983 This variable conditionally defines pthread_create_joinable.
984 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
986 d_oldpthreads (usethreads.U):
987 This variable conditionally defines the OLD_PTHREADS_API symbol,
988 and indicates that Perl should be built to use the old
989 draft POSIX threads API. This is only potneially meaningful if
992 d_oldsock (d_socket.U):
993 This variable conditionally defines the OLDSOCKET symbol, which
994 indicates that the BSD socket interface is based on 4.1c and not 4.2.
997 This variable conditionally defines the HAS_OPEN3 manifest constant,
998 which indicates to the C program that the 3 argument version of
999 the open(2) function is available.
1002 This variable conditionally defines the HAS_OPEN64 symbol, which
1003 indicates to the C program that the open64() routine is available.
1005 d_opendir64 (io64.U):
1006 This variable conditionally defines the HAS_OPENDIR64 symbol, which
1007 indicates to the C program that the opendir64() routine is available.
1009 d_pathconf (d_pathconf.U):
1010 This variable conditionally defines the HAS_PATHCONF symbol, which
1011 indicates to the C program that the pathconf() routine is available
1012 to determine file-system related limits and options associated
1013 with a given filename.
1015 d_pause (d_pause.U):
1016 This variable conditionally defines the HAS_PAUSE symbol, which
1017 indicates to the C program that the pause() routine is available
1018 to suspend a process until a signal is received.
1020 d_phostname (d_gethname.U):
1021 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1022 contains the shell command which, when fed to popen(), may be
1023 used to derive the host name.
1026 This variable conditionally defines the HAS_PIPE symbol, which
1027 indicates to the C program that the pipe() routine is available
1028 to create an inter-process channel.
1031 This variable conditionally defines the HAS_POLL symbol, which
1032 indicates to the C program that the poll() routine is available
1033 to poll active file descriptors.
1035 d_portable (d_portable.U):
1036 This variable conditionally defines the PORTABLE symbol, which
1037 indicates to the C program that it should not assume that it is
1038 running on the machine it was compiled on.
1040 d_pthread_yield (d_pthread_y.U):
1041 This variable conditionally defines the HAS_PTHREAD_YIELD
1042 symbol if the pthread_yield routine is available to yield
1043 the execution of the current thread.
1046 This variable conditionally defines PWAGE, which indicates
1047 that struct passwd contains pw_age.
1049 d_pwchange (i_pwd.U):
1050 This variable conditionally defines PWCHANGE, which indicates
1051 that struct passwd contains pw_change.
1053 d_pwclass (i_pwd.U):
1054 This variable conditionally defines PWCLASS, which indicates
1055 that struct passwd contains pw_class.
1057 d_pwcomment (i_pwd.U):
1058 This variable conditionally defines PWCOMMENT, which indicates
1059 that struct passwd contains pw_comment.
1061 d_pwexpire (i_pwd.U):
1062 This variable conditionally defines PWEXPIRE, which indicates
1063 that struct passwd contains pw_expire.
1065 d_pwgecos (i_pwd.U):
1066 This variable conditionally defines PWGECOS, which indicates
1067 that struct passwd contains pw_gecos.
1069 d_pwpasswd (i_pwd.U):
1070 This variable conditionally defines PWPASSWD, which indicates
1071 that struct passwd contains pw_passwd.
1073 d_pwquota (i_pwd.U):
1074 This variable conditionally defines PWQUOTA, which indicates
1075 that struct passwd contains pw_quota.
1077 d_readdir64 (io64.U):
1078 This variable conditionally defines the HAS_READDIR64 symbol, which
1079 indicates to the C program that the readdir64() routine is available.
1081 d_readdir (d_readdir.U):
1082 This variable conditionally defines HAS_READDIR if readdir() is
1083 available to read directory entries.
1085 d_readlink (d_readlink.U):
1086 This variable conditionally defines the HAS_READLINK symbol, which
1087 indicates to the C program that the readlink() routine is available
1088 to read the value of a symbolic link.
1090 d_readv (d_readv.U):
1091 This variable conditionally defines the HAS_READV symbol, which
1092 indicates to the C program that the readv() routine is available.
1094 d_recvmsg (d_socket.U):
1095 This variable conditionally defines the HAS_RECVMSG symbol,
1096 which indicates that the recvmsg is supported.
1098 d_rename (d_rename.U):
1099 This variable conditionally defines the HAS_RENAME symbol, which
1100 indicates to the C program that the rename() routine is available
1103 d_rewinddir (d_readdir.U):
1104 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1107 d_rmdir (d_rmdir.U):
1108 This variable conditionally defines HAS_RMDIR if rmdir() is
1109 available to remove directories.
1111 d_safebcpy (d_safebcpy.U):
1112 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1113 the bcopy() routine can do overlapping copies.
1115 d_safemcpy (d_safemcpy.U):
1116 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1117 the memcpy() routine can do overlapping copies.
1119 d_sanemcmp (d_sanemcmp.U):
1120 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1121 the memcpy() routine is available and can be used to compare relative
1122 magnitudes of chars with their high bits set.
1124 d_sched_yield (d_pthread_y.U):
1125 This variable conditionally defines the HAS_SCHED_YIELD
1126 symbol if the sched_yield routine is available to yield
1127 the execution of the current thread.
1129 d_scm_rights (d_socket.U):
1130 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1131 which indicates that the SCM_RIGHTS is available. #ifdef is
1132 not enough because it may be an enum, glibc has been known to do this.
1134 d_seekdir64 (io64.U):
1135 This variable conditionally defines the HAS_SEEKDIR64 symbol, which
1136 indicates to the C program that the seekdir64() routine is available.
1138 d_seekdir (d_readdir.U):
1139 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1142 d_select (d_select.U):
1143 This variable conditionally defines HAS_SELECT if select() is
1144 available to select active file descriptors. A <sys/time.h>
1145 inclusion may be necessary for the timeout field.
1148 This variable conditionally defines the HAS_SEM symbol, which
1149 indicates that the entire sem*(2) library is present.
1151 d_semctl (d_semctl.U):
1152 This variable conditionally defines the HAS_SEMCTL symbol, which
1153 indicates to the C program that the semctl() routine is available.
1155 d_semctl_semid_ds (d_union_semun.U):
1156 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1157 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1159 d_semctl_semun (d_union_semun.U):
1160 This variable conditionally defines USE_SEMCTL_SEMUN, which
1161 indicates that union semun is to be used for semctl IPC_STAT.
1163 d_semget (d_semget.U):
1164 This variable conditionally defines the HAS_SEMGET symbol, which
1165 indicates to the C program that the semget() routine is available.
1167 d_semop (d_semop.U):
1168 This variable conditionally defines the HAS_SEMOP symbol, which
1169 indicates to the C program that the semop() routine is available.
1171 d_sendmsg (d_socket.U):
1172 This variable conditionally defines the HAS_SENDMSG symbol,
1173 which indicates that the sendmsg is supported.
1175 d_setegid (d_setegid.U):
1176 This variable conditionally defines the HAS_SETEGID symbol, which
1177 indicates to the C program that the setegid() routine is available
1178 to change the effective gid of the current program.
1180 d_seteuid (d_seteuid.U):
1181 This variable conditionally defines the HAS_SETEUID symbol, which
1182 indicates to the C program that the seteuid() routine is available
1183 to change the effective uid of the current program.
1185 d_setgrent (d_setgrent.U):
1186 This variable conditionally defines the HAS_SETGRENT symbol, which
1187 indicates to the C program that the setgrent() routine is available
1188 for initializing sequential access to the group database.
1190 d_setgrps (d_setgrps.U):
1191 This variable conditionally defines the HAS_SETGROUPS symbol, which
1192 indicates to the C program that the setgroups() routine is available
1193 to set the list of process groups.
1195 d_sethent (d_sethent.U):
1196 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1199 d_setlinebuf (d_setlnbuf.U):
1200 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1201 indicates to the C program that the setlinebuf() routine is available
1202 to change stderr or stdout from block-buffered or unbuffered to a
1205 d_setlocale (d_setlocale.U):
1206 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1207 available to handle locale-specific ctype implementations.
1209 d_setnent (d_setnent.U):
1210 This variable conditionally defines HAS_SETNETENT if setnetent() is
1213 d_setpent (d_setpent.U):
1214 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1217 d_setpgid (d_setpgid.U):
1218 This variable conditionally defines the HAS_SETPGID symbol if the
1219 setpgid(pid, gpid) function is available to set process group ID.
1221 d_setpgrp2 (d_setpgrp2.U):
1222 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1223 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1224 is available to set the current process group.
1226 d_setpgrp (d_setpgrp.U):
1227 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1228 available to set the current process group.
1230 d_setprior (d_setprior.U):
1231 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1232 is available to set a process's priority.
1234 d_setpwent (d_setpwent.U):
1235 This variable conditionally defines the HAS_SETPWENT symbol, which
1236 indicates to the C program that the setpwent() routine is available
1237 for initializing sequential access to the passwd database.
1239 d_setregid (d_setregid.U):
1240 This variable conditionally defines HAS_SETREGID if setregid() is
1241 available to change the real and effective gid of the current
1244 d_setresgid (d_setregid.U):
1245 This variable conditionally defines HAS_SETRESGID if setresgid() is
1246 available to change the real, effective and saved gid of the current
1249 d_setresuid (d_setreuid.U):
1250 This variable conditionally defines HAS_SETREUID if setresuid() is
1251 available to change the real, effective and saved uid of the current
1254 d_setreuid (d_setreuid.U):
1255 This variable conditionally defines HAS_SETREUID if setreuid() is
1256 available to change the real and effective uid of the current
1259 d_setrgid (d_setrgid.U):
1260 This variable conditionally defines the HAS_SETRGID symbol, which
1261 indicates to the C program that the setrgid() routine is available
1262 to change the real gid of the current program.
1264 d_setruid (d_setruid.U):
1265 This variable conditionally defines the HAS_SETRUID symbol, which
1266 indicates to the C program that the setruid() routine is available
1267 to change the real uid of the current program.
1269 d_setsent (d_setsent.U):
1270 This variable conditionally defines HAS_SETSERVENT if setservent() is
1273 d_setsid (d_setsid.U):
1274 This variable conditionally defines HAS_SETSID if setsid() is
1275 available to set the process group ID.
1277 d_setvbuf (d_setvbuf.U):
1278 This variable conditionally defines the HAS_SETVBUF symbol, which
1279 indicates to the C program that the setvbuf() routine is available
1280 to change buffering on an open stdio stream.
1283 This variable conditionally defines the USE_SFIO symbol,
1284 and indicates whether sfio is available (and should be used).
1287 This variable conditionally defines the HAS_SHM symbol, which
1288 indicates that the entire shm*(2) library is present.
1290 d_shmat (d_shmat.U):
1291 This variable conditionally defines the HAS_SHMAT symbol, which
1292 indicates to the C program that the shmat() routine is available.
1294 d_shmatprototype (d_shmat.U):
1295 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1296 symbol, which indicates that sys/shm.h has a prototype for
1299 d_shmctl (d_shmctl.U):
1300 This variable conditionally defines the HAS_SHMCTL symbol, which
1301 indicates to the C program that the shmctl() routine is available.
1303 d_shmdt (d_shmdt.U):
1304 This variable conditionally defines the HAS_SHMDT symbol, which
1305 indicates to the C program that the shmdt() routine is available.
1307 d_shmget (d_shmget.U):
1308 This variable conditionally defines the HAS_SHMGET symbol, which
1309 indicates to the C program that the shmget() routine is available.
1311 d_sigaction (d_sigaction.U):
1312 This variable conditionally defines the HAS_SIGACTION symbol, which
1313 indicates that the Vr4 sigaction() routine is available.
1315 d_sigsetjmp (d_sigsetjmp.U):
1316 This variable conditionally defines the HAS_SIGSETJMP symbol,
1317 which indicates that the sigsetjmp() routine is available to
1318 call setjmp() and optionally save the process's signal mask.
1320 d_socket (d_socket.U):
1321 This variable conditionally defines HAS_SOCKET, which indicates
1322 that the BSD socket interface is supported.
1324 d_sockpair (d_socket.U):
1325 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1326 indicates that the BSD socketpair() is supported.
1329 This variable conditionally defines the HAS_STAT64 symbol, which
1330 indicates to the C program that the stat64() routine is available.
1332 d_statblks (d_statblks.U):
1333 This variable conditionally defines USE_STAT_BLOCKS
1334 if this system has a stat structure declaring
1335 st_blksize and st_blocks.
1337 d_statfs (d_statfs.U):
1338 This variable conditionally defines the HAS_STATFS symbol, which
1339 indicates to the C program that the statfs() routine is available.
1341 d_statfsflags (d_statfs.U):
1342 This variable conditionally defines the HAS_STRUCT_STATFS_FLAGS
1343 symbol, which indicates to struct statfs from has f_flags member.
1344 This kind of struct statfs is coming from sys/mount.h (BSD),
1345 not from sys/statfs.h (SYSV).
1347 d_statvfs (d_statvfs.U):
1348 This variable conditionally defines the HAS_STATVFS symbol, which
1349 indicates to the C program that the statvfs() routine is available.
1351 d_stdio_cnt_lval (d_stdstdio.U):
1352 This variable conditionally defines STDIO_CNT_LVALUE if the
1353 FILE_cnt macro can be used as an lvalue.
1355 d_stdio_ptr_lval (d_stdstdio.U):
1356 This variable conditionally defines STDIO_PTR_LVALUE if the
1357 FILE_ptr macro can be used as an lvalue.
1359 d_stdio_stream_array (stdio_streams.U):
1360 This variable tells whether there is an array holding
1363 d_stdiobase (d_stdstdio.U):
1364 This variable conditionally defines USE_STDIO_BASE if this system
1365 has a FILE structure declaring a usable _base field (or equivalent)
1368 d_stdstdio (d_stdstdio.U):
1369 This variable conditionally defines USE_STDIO_PTR if this system
1370 has a FILE structure declaring usable _ptr and _cnt fields (or
1371 equivalent) in stdio.h.
1373 d_store64 (dbm64.U):
1374 This variable conditionally defines the HAS_STORE64 symbol, which
1375 indicates to the C program that the store64() routine is available.
1377 d_strchr (d_strchr.U):
1378 This variable conditionally defines HAS_STRCHR if strchr() and
1379 strrchr() are available for string searching.
1381 d_strcoll (d_strcoll.U):
1382 This variable conditionally defines HAS_STRCOLL if strcoll() is
1383 available to compare strings using collating information.
1385 d_strctcpy (d_strctcpy.U):
1386 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1387 indicates to the C program that this C compiler knows how to copy
1390 d_strerrm (d_strerror.U):
1391 This variable holds what Strerrr is defined as to translate an error
1392 code condition into an error message string. It could be 'strerror'
1393 or a more complex macro emulating strrror with sys_errlist[], or the
1394 "unknown" string when both strerror and sys_errlist are missing.
1396 d_strerror (d_strerror.U):
1397 This variable conditionally defines HAS_STRERROR if strerror() is
1398 available to translate error numbers to strings.
1400 d_strtod (d_strtod.U):
1401 This variable conditionally defines the HAS_STRTOD symbol, which
1402 indicates to the C program that the strtod() routine is available
1403 to provide better numeric string conversion than atof().
1405 d_strtol (d_strtol.U):
1406 This variable conditionally defines the HAS_STRTOL symbol, which
1407 indicates to the C program that the strtol() routine is available
1408 to provide better numeric string conversion than atoi() and friends.
1410 d_strtoul (d_strtoul.U):
1411 This variable conditionally defines the HAS_STRTOUL symbol, which
1412 indicates to the C program that the strtoul() routine is available
1413 to provide conversion of strings to unsigned long.
1415 d_strxfrm (d_strxfrm.U):
1416 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1417 available to transform strings.
1419 d_suidsafe (d_dosuid.U):
1420 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1421 if setuid scripts can be secure. This test looks in /dev/fd/.
1423 d_symlink (d_symlink.U):
1424 This variable conditionally defines the HAS_SYMLINK symbol, which
1425 indicates to the C program that the symlink() routine is available
1426 to create symbolic links.
1428 d_syscall (d_syscall.U):
1429 This variable conditionally defines HAS_SYSCALL if syscall() is
1430 available call arbitrary system calls.
1432 d_sysconf (d_sysconf.U):
1433 This variable conditionally defines the HAS_SYSCONF symbol, which
1434 indicates to the C program that the sysconf() routine is available
1435 to determine system related limits and options.
1437 d_sysernlst (d_strerror.U):
1438 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1439 is available to translate error numbers to the symbolic name.
1441 d_syserrlst (d_strerror.U):
1442 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1443 available to translate error numbers to strings.
1445 d_system (d_system.U):
1446 This variable conditionally defines HAS_SYSTEM if system() is
1447 available to issue a shell command.
1449 d_tcgetpgrp (d_tcgtpgrp.U):
1450 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1451 indicates to the C program that the tcgetpgrp() routine is available.
1452 to get foreground process group ID.
1454 d_tcsetpgrp (d_tcstpgrp.U):
1455 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1456 indicates to the C program that the tcsetpgrp() routine is available
1457 to set foreground process group ID.
1459 d_telldir64 (io64.U):
1460 This variable conditionally defines the HAS_TELLDIR64 symbol, which
1461 indicates to the C program that the telldir64() routine is available.
1463 d_telldir (d_readdir.U):
1464 This variable conditionally defines HAS_TELLDIR if telldir() is
1467 d_telldirproto (d_telldirproto.U):
1468 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1469 which indicates to the C program that the system provides
1470 a prototype for the telldir() function. Otherwise, it is
1471 up to the program to supply one.
1474 This variable conditionally defines the HAS_TIME symbol, which indicates
1475 that the time() routine exists. The time() routine is normaly
1476 provided on UNIX systems.
1478 d_times (d_times.U):
1479 This variable conditionally defines the HAS_TIMES symbol, which indicates
1480 that the times() routine exists. The times() routine is normaly
1481 provided on UNIX systems. You may have to include <sys/times.h>.
1483 d_tmpfile64 (stdio64.U):
1484 This variable conditionally defines the HAS_TMPFILE64 symbol, which
1485 indicates to the C program that the tmpfile64() routine is available.
1487 d_truncate64 (io64.U):
1488 This variable conditionally defines the HAS_TRUNCATE64 symbol, which
1489 indicates to the C program that the truncate64() routine is available.
1491 d_truncate (d_truncate.U):
1492 This variable conditionally defines HAS_TRUNCATE if truncate() is
1493 available to truncate files.
1495 d_tzname (d_tzname.U):
1496 This variable conditionally defines HAS_TZNAME if tzname[] is
1497 available to access timezone names.
1499 d_umask (d_umask.U):
1500 This variable conditionally defines the HAS_UMASK symbol, which
1501 indicates to the C program that the umask() routine is available.
1502 to set and get the value of the file creation mask.
1504 d_uname (d_gethname.U):
1505 This variable conditionally defines the HAS_UNAME symbol, which
1506 indicates to the C program that the uname() routine may be
1507 used to derive the host name.
1509 d_union_semun (d_union_semun.U):
1510 This variable conditionally defines HAS_UNION_SEMUN if the
1511 union semun is defined by including <sys/sem.h>.
1513 d_vfork (d_vfork.U):
1514 This variable conditionally defines the HAS_VFORK symbol, which
1515 indicates the vfork() routine is available.
1517 d_void_closedir (d_closedir.U):
1518 This variable conditionally defines VOID_CLOSEDIR if closedir()
1519 does not return a value.
1521 d_voidsig (d_voidsig.U):
1522 This variable conditionally defines VOIDSIG if this system
1523 declares "void (*signal(...))()" in signal.h. The old way was to
1524 declare it as "int (*signal(...))()".
1526 d_voidtty (i_sysioctl.U):
1527 This variable conditionally defines USE_IOCNOTTY to indicate that the
1528 ioctl() call with TIOCNOTTY should be used to void tty association.
1529 Otherwise (on USG probably), it is enough to close the standard file
1530 decriptors and do a setpgrp().
1532 d_volatile (d_volatile.U):
1533 This variable conditionally defines the HASVOLATILE symbol, which
1534 indicates to the C program that this C compiler knows about the
1535 volatile declaration.
1537 d_vprintf (d_vprintf.U):
1538 This variable conditionally defines the HAS_VPRINTF symbol, which
1539 indicates to the C program that the vprintf() routine is available
1540 to printf with a pointer to an argument list.
1542 d_wait4 (d_wait4.U):
1543 This variable conditionally defines the HAS_WAIT4 symbol, which
1544 indicates the wait4() routine is available.
1546 d_waitpid (d_waitpid.U):
1547 This variable conditionally defines HAS_WAITPID if waitpid() is
1548 available to wait for child process.
1550 d_wcstombs (d_wcstombs.U):
1551 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1552 indicates to the C program that the wcstombs() routine is available
1553 to convert wide character strings to multibyte strings.
1555 d_wctomb (d_wctomb.U):
1556 This variable conditionally defines the HAS_WCTOMB symbol, which
1557 indicates to the C program that the wctomb() routine is available
1558 to convert a wide character to a multibyte.
1560 d_writev (d_writev.U):
1561 This variable conditionally defines the HAS_WRITEV symbol, which
1562 indicates to the C program that the writev() routine is available.
1565 This variable conditionally defines the symbol XENIX, which alerts
1566 the C program that it runs under Xenix.
1569 This variable is be used internally by Configure to determine the
1570 full pathname (if any) of the date program. After Configure runs,
1571 the value is reset to a plain "date" and is not useful.
1573 db_hashtype (i_db.U):
1574 This variable contains the type of the hash structure element
1575 in the <db.h> header file. In older versions of DB, it was
1576 int, while in newer ones it is u_int32_t.
1578 db_prefixtype (i_db.U):
1579 This variable contains the type of the prefix structure element
1580 in the <db.h> header file. In older versions of DB, it was
1581 int, while in newer ones it is size_t.
1583 defvoidused (voidflags.U):
1584 This variable contains the default value of the VOIDUSED symbol (15).
1586 direntrytype (i_dirent.U):
1587 This symbol is set to 'struct direct' or 'struct dirent' depending on
1588 whether dirent is available or not. You should use this pseudo type to
1589 portably declare your directory entries.
1592 This variable contains the extension that is to be used for the
1593 dynamically loaded modules that perl generaties.
1596 This variable contains the name of the dynamic loading file that
1597 will be used with the package.
1599 doublesize (doublesize.U):
1600 This variable contains the value of the DOUBLESIZE symbol, which
1601 indicates to the C program how many bytes there are in a double.
1603 drand01 (randfunc.U):
1604 Indicates the macro to be used to generate normalized
1605 random numbers. Uses randfunc, often divided by
1606 (double) (((unsigned long) 1 << randbits)) in order to
1607 normalize the result.
1608 In C programs, the macro 'Drand01' is mapped to drand01.
1610 dynamic_ext (Extensions.U):
1611 This variable holds a list of XS extension files we want to
1612 link dynamically into the package. It is used by Makefile.
1614 eagain (nblock_io.U):
1615 This variable bears the symbolic errno code set by read() when no
1616 data is present on the file and non-blocking I/O was enabled (otherwise,
1617 read() blocks naturally).
1620 This variable conditionally defines EBCDIC if this
1621 system uses EBCDIC encoding. Among other things, this
1622 means that the character ranges are not contiguous.
1626 This variable is be used internally by Configure to determine the
1627 full pathname (if any) of the echo program. After Configure runs,
1628 the value is reset to a plain "echo" and is not useful.
1631 This variable is be used internally by Configure to determine the
1632 full pathname (if any) of the egrep program. After Configure runs,
1633 the value is reset to a plain "egrep" and is not useful.
1636 This variable is defined but not used by Configure.
1637 The value is a plain '' and is not useful.
1640 When running under Eunice this variable contains a command which will
1641 convert a shell script to the proper form of text file for it to be
1642 executable by the shell. On other systems it is a no-op.
1645 This is an old synonym for _exe.
1648 This variable is be used internally by Configure to determine the
1649 full pathname (if any) of the expr program. After Configure runs,
1650 the value is reset to a plain "expr" and is not useful.
1652 extensions (Extensions.U):
1653 This variable holds a list of all extension files (both XS and
1654 non-xs linked into the package. It is propagated to Config.pm
1655 and is typically used to test whether a particular extesion
1658 fflushall (fflushall.U):
1659 This symbol, if defined, tells that to flush
1660 all pending stdio output one must loop through all
1661 the stdio file handles stored in an array and fflush them.
1662 Note that if fflushNULL is defined, fflushall will not
1663 even be probed for and will be left undefined.
1665 fflushNULL (fflushall.U):
1666 This symbol, if defined, tells that fflush(NULL) does flush
1667 all pending stdio output.
1670 This variable is defined but not used by Configure.
1671 The value is a plain '' and is not useful.
1673 firstmakefile (Unix.U):
1674 This variable defines the first file searched by make. On unix,
1675 it is makefile (then Makefile). On case-insensitive systems,
1676 it might be something else. This is only used to deal with
1677 convoluted make depend tricks.
1680 This variable is defined but not used by Configure.
1681 The value is a plain '' and is not useful.
1683 fpostype (fpostype.U):
1684 This variable defines Fpos_t to be something like fpost_t, long,
1685 uint, or whatever type is used to declare file positions in libc.
1687 freetype (mallocsrc.U):
1688 This variable contains the return type of free(). It is usually
1689 void, but occasionally int.
1692 This variable contains the full pathname to 'ar', whether or
1693 not the user has specified 'portability'. This is only used
1697 This variable contains the full pathname to 'csh', whether or
1698 not the user has specified 'portability'. This is only used
1699 in the compiled C program, and we assume that all systems which
1700 can share this executable will have the same full pathname to
1703 full_sed (Loc_sed.U):
1704 This variable contains the full pathname to 'sed', whether or
1705 not the user has specified 'portability'. This is only used
1706 in the compiled C program, and we assume that all systems which
1707 can share this executable will have the same full pathname to
1711 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1712 indicate whether the compiler is version 1 or 2. This is used in
1713 setting some of the default cflags. It is set to '' if not gcc.
1715 gidtype (gidtype.U):
1716 This variable defines Gid_t to be something like gid_t, int,
1717 ushort, or whatever type is used to declare the return type
1718 of getgid(). Typically, it is the type of group ids in the kernel.
1721 This variable holds the general path (space-separated) used to
1722 find libraries. It may contain directories that do not exist on
1723 this platform, libpth is the cleaned-up version.
1726 This variable is be used internally by Configure to determine the
1727 full pathname (if any) of the grep program. After Configure runs,
1728 the value is reset to a plain "grep" and is not useful.
1731 This variable contains a command that produces the text of the
1732 /etc/group file. This is normally "cat /etc/group", but can be
1733 "ypcat group" when NIS is used.
1735 groupstype (groupstype.U):
1736 This variable defines Groups_t to be something like gid_t, int,
1737 ushort, or whatever type is used for the second argument to
1738 getgroups() and setgroups(). Usually, this is the same as
1739 gidtype (gid_t), but sometimes it isn't.
1742 This variable is be used internally by Configure to determine the
1743 full pathname (if any) of the gzip program. After Configure runs,
1744 the value is reset to a plain "gzip" and is not useful.
1746 h_fcntl (h_fcntl.U):
1747 This is variable gets set in various places to tell i_fcntl that
1748 <fcntl.h> should be included.
1750 h_sysfile (h_sysfile.U):
1751 This is variable gets set in various places to tell i_sys_file that
1752 <sys/file.h> should be included.
1755 Gives the type of hints used for previous answers. May be one of
1756 "default", "recommended" or "previous".
1759 This variable contains a command that produces the text of the
1760 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1761 "ypcat hosts" when NIS is used.
1764 This variable contains a flag which will tell the C compiler and loader
1765 to produce a program running with a huge memory model. If the
1766 huge model is not supported, contains the flag to produce large
1767 model programs. It is up to the Makefile to use this.
1769 i_arpainet (i_arpainet.U):
1770 This variable conditionally defines the I_ARPA_INET symbol,
1771 and indicates whether a C program should include <arpa/inet.h>.
1773 i_bsdioctl (i_sysioctl.U):
1774 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1775 indicates to the C program that <sys/bsdioctl.h> exists and should
1779 This variable conditionally defines the I_DB symbol, and indicates
1780 whether a C program may include Berkeley's DB include file <db.h>.
1783 This variable conditionally defines the I_DBM symbol, which
1784 indicates to the C program that <dbm.h> exists and should
1787 i_dirent (i_dirent.U):
1788 This variable conditionally defines I_DIRENT, which indicates
1789 to the C program that it should include <dirent.h>.
1792 This variable conditionally defines the I_DLD symbol, which
1793 indicates to the C program that <dld.h> (GNU dynamic loading)
1794 exists and should be included.
1796 i_dlfcn (i_dlfcn.U):
1797 This variable conditionally defines the I_DLFCN symbol, which
1798 indicates to the C program that <dlfcn.h> exists and should
1801 i_fcntl (i_fcntl.U):
1802 This variable controls the value of I_FCNTL (which tells
1803 the C program to include <fcntl.h>).
1805 i_float (i_float.U):
1806 This variable conditionally defines the I_FLOAT symbol, and indicates
1807 whether a C program may include <float.h> to get symbols like DBL_MAX
1808 or DBL_MIN, i.e. machine dependent floating point values.
1811 This variable conditionally defines the I_GDBM symbol, which
1812 indicates to the C program that <gdbm.h> exists and should
1816 This variable conditionally defines the I_GRP symbol, and indicates
1817 whether a C program should include <grp.h>.
1819 i_inttypes (i_inttypes.U):
1820 This variable conditionally defines the I_INTTYPES symbol,
1821 and indicates whether a C program should include <inttypes.h>.
1823 i_limits (i_limits.U):
1824 This variable conditionally defines the I_LIMITS symbol, and indicates
1825 whether a C program may include <limits.h> to get symbols like WORD_BIT
1828 i_locale (i_locale.U):
1829 This variable conditionally defines the I_LOCALE symbol,
1830 and indicates whether a C program should include <locale.h>.
1832 i_machcthr (i_machcthr.U):
1833 This variable conditionally defines the I_MACH_CTHREADS symbol,
1834 and indicates whether a C program should include <mach/cthreads.h>.
1836 i_malloc (i_malloc.U):
1837 This variable conditionally defines the I_MALLOC symbol, and indicates
1838 whether a C program should include <malloc.h>.
1841 This variable conditionally defines the I_MATH symbol, and indicates
1842 whether a C program may include <math.h>.
1844 i_memory (i_memory.U):
1845 This variable conditionally defines the I_MEMORY symbol, and indicates
1846 whether a C program should include <memory.h>.
1848 i_mntent (i_mntent.U):
1849 This variable conditionally defines the I_MNTENT symbol, and indicates
1850 whether a C program should include <mntent.h>.
1853 This variable conditionally defines the I_NDBM symbol, which
1854 indicates to the C program that <ndbm.h> exists and should
1857 i_netdb (i_netdb.U):
1858 This variable conditionally defines the I_NETDB symbol, and indicates
1859 whether a C program should include <netdb.h>.
1861 i_neterrno (i_neterrno.U):
1862 This variable conditionally defines the I_NET_ERRNO symbol, which
1863 indicates to the C program that <net/errno.h> exists and should
1866 i_netinettcp (i_netinettcp.U):
1867 This variable conditionally defines the I_NETINET_TCP symbol,
1868 and indicates whether a C program should include <netinet/tcp.h>.
1871 This variable conditionally defines I_NETINET_IN, which indicates
1872 to the C program that it should include <netinet/in.h>. Otherwise,
1873 you may try <sys/in.h>.
1876 This variable conditionally defines the I_POLL symbol, and indicates
1877 whether a C program should include <poll.h>.
1879 i_pthread (i_pthread.U):
1880 This variable conditionally defines the I_PTHREADEAD symbol,
1881 and indicates whether a C program should include <pthread.h>.
1884 This variable conditionally defines I_PWD, which indicates
1885 to the C program that it should include <pwd.h>.
1887 i_rpcsvcdbm (i_dbm.U):
1888 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1889 indicates to the C program that <rpcsvc/dbm.h> exists and should
1890 be included. Some System V systems might need this instead of <dbm.h>.
1893 This variable conditionally defines the I_SFIO symbol,
1894 and indicates whether a C program should include <sfio.h>.
1896 i_sgtty (i_termio.U):
1897 This variable conditionally defines the I_SGTTY symbol, which
1898 indicates to the C program that it should include <sgtty.h> rather
1901 i_stdarg (i_varhdr.U):
1902 This variable conditionally defines the I_STDARG symbol, which
1903 indicates to the C program that <stdarg.h> exists and should
1906 i_stddef (i_stddef.U):
1907 This variable conditionally defines the I_STDDEF symbol, which
1908 indicates to the C program that <stddef.h> exists and should
1911 i_stdlib (i_stdlib.U):
1912 This variable conditionally defines the I_STDLIB symbol, which
1913 indicates to the C program that <stdlib.h> exists and should
1916 i_string (i_string.U):
1917 This variable conditionally defines the I_STRING symbol, which
1918 indicates that <string.h> should be included rather than <strings.h>.
1920 i_sysaccess (i_sysaccess.U):
1921 This variable conditionally defines the I_SYS_ACCESS symbol,
1922 and indicates whether a C program should include <sys/access.h>.
1924 i_sysdir (i_sysdir.U):
1925 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1926 whether a C program should include <sys/dir.h>.
1928 i_sysfile (i_sysfile.U):
1929 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1930 whether a C program should include <sys/file.h> to get R_OK and friends.
1932 i_sysfilio (i_sysioctl.U):
1933 This variable conditionally defines the I_SYS_FILIO symbol, which
1934 indicates to the C program that <sys/filio.h> exists and should
1935 be included in preference to <sys/ioctl.h>.
1938 This variable conditionally defines I_SYS_IN, which indicates
1939 to the C program that it should include <sys/in.h> instead of
1942 i_sysioctl (i_sysioctl.U):
1943 This variable conditionally defines the I_SYS_IOCTL symbol, which
1944 indicates to the C program that <sys/ioctl.h> exists and should
1947 i_sysmman (i_sysmman.U):
1948 This variable conditionally defines the I_SYS_MMAN symbol, and
1949 indicates whether a C program should include <sys/mman.h>.
1951 i_sysmount (i_sysmount.U):
1952 This variable conditionally defines the I_SYSMOUNT symbol,
1953 and indicates whether a C program should include <sys/mount.h>.
1955 i_sysndir (i_sysndir.U):
1956 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1957 whether a C program should include <sys/ndir.h>.
1959 i_sysparam (i_sysparam.U):
1960 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1961 whether a C program should include <sys/param.h>.
1963 i_sysresrc (i_sysresrc.U):
1964 This variable conditionally defines the I_SYS_RESOURCE symbol,
1965 and indicates whether a C program should include <sys/resource.h>.
1967 i_syssecrt (i_syssecrt.U):
1968 This variable conditionally defines the I_SYS_SECURITY symbol,
1969 and indicates whether a C program should include <sys/security.h>.
1971 i_sysselct (i_sysselct.U):
1972 This variable conditionally defines I_SYS_SELECT, which indicates
1973 to the C program that it should include <sys/select.h> in order to
1974 get the definition of struct timeval.
1976 i_syssockio (i_sysioctl.U):
1977 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1978 C program that socket ioctl codes may be found in <sys/sockio.h>
1979 instead of <sys/ioctl.h>.
1981 i_sysstat (i_sysstat.U):
1982 This variable conditionally defines the I_SYS_STAT symbol,
1983 and indicates whether a C program should include <sys/stat.h>.
1985 i_sysstatvfs (i_sysstatvfs.U):
1986 This variable conditionally defines the I_SYSSTATVFS symbol,
1987 and indicates whether a C program should include <sys/statvfs.h>.
1989 i_systime (i_time.U):
1990 This variable conditionally defines I_SYS_TIME, which indicates
1991 to the C program that it should include <sys/time.h>.
1993 i_systimek (i_time.U):
1994 This variable conditionally defines I_SYS_TIME_KERNEL, which
1995 indicates to the C program that it should include <sys/time.h>
1996 with KERNEL defined.
1998 i_systimes (i_systimes.U):
1999 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2000 whether a C program should include <sys/times.h>.
2002 i_systypes (i_systypes.U):
2003 This variable conditionally defines the I_SYS_TYPES symbol,
2004 and indicates whether a C program should include <sys/types.h>.
2006 i_sysuio (i_sysuio.U):
2007 This variable conditionally defines the I_SYSUIO symbol, and indicates
2008 whether a C program should include <sys/uio.h>.
2010 i_sysun (i_sysun.U):
2011 This variable conditionally defines I_SYS_UN, which indicates
2012 to the C program that it should include <sys/un.h> to get UNIX
2013 domain socket definitions.
2015 i_syswait (i_syswait.U):
2016 This variable conditionally defines I_SYS_WAIT, which indicates
2017 to the C program that it should include <sys/wait.h>.
2019 i_termio (i_termio.U):
2020 This variable conditionally defines the I_TERMIO symbol, which
2021 indicates to the C program that it should include <termio.h> rather
2024 i_termios (i_termio.U):
2025 This variable conditionally defines the I_TERMIOS symbol, which
2026 indicates to the C program that the POSIX <termios.h> file is
2030 This variable conditionally defines I_TIME, which indicates
2031 to the C program that it should include <time.h>.
2033 i_unistd (i_unistd.U):
2034 This variable conditionally defines the I_UNISTD symbol, and indicates
2035 whether a C program should include <unistd.h>.
2037 i_utime (i_utime.U):
2038 This variable conditionally defines the I_UTIME symbol, and indicates
2039 whether a C program should include <utime.h>.
2041 i_values (i_values.U):
2042 This variable conditionally defines the I_VALUES symbol, and indicates
2043 whether a C program may include <values.h> to get symbols like MAXLONG
2046 i_varargs (i_varhdr.U):
2047 This variable conditionally defines I_VARARGS, which indicates
2048 to the C program that it should include <varargs.h>.
2050 i_varhdr (i_varhdr.U):
2051 Contains the name of the header to be included to get va_dcl definition.
2052 Typically one of varargs.h or stdarg.h.
2054 i_vfork (i_vfork.U):
2055 This variable conditionally defines the I_VFORK symbol, and indicates
2056 whether a C program should include vfork.h.
2058 ignore_versioned_solibs (libs.U):
2059 This variable should be non-empty if non-versioned shared
2060 libraries (libfoo.so.x.y) are to be ignored (because they
2061 cannot be linked against).
2064 This variable must preceed the normal include path to get hte
2065 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2066 Value can be "" or "/bsd43" on mips.
2069 This variable is defined but not used by Configure.
2070 The value is a plain '' and is not useful.
2072 installarchlib (archlib.U):
2073 This variable is really the same as archlibexp but may differ on
2074 those systems using AFS. For extra portability, only this variable
2075 should be used in makefiles.
2078 This variable is the same as binexp unless AFS is running in which case
2079 the user is explicitely prompted for it. This variable should always
2080 be used in your makefiles for maximum portability.
2082 installman1dir (man1dir.U):
2083 This variable is really the same as man1direxp, unless you are using
2084 AFS in which case it points to the read/write location whereas
2085 man1direxp only points to the read-only access location. For extra
2086 portability, you should only use this variable within your makefiles.
2088 installman3dir (man3dir.U):
2089 This variable is really the same as man3direxp, unless you are using
2090 AFS in which case it points to the read/write location whereas
2091 man3direxp only points to the read-only access location. For extra
2092 portability, you should only use this variable within your makefiles.
2094 installprivlib (privlib.U):
2095 This variable is really the same as privlibexp but may differ on
2096 those systems using AFS. For extra portability, only this variable
2097 should be used in makefiles.
2099 installscript (scriptdir.U):
2100 This variable is usually the same as scriptdirexp, unless you are on
2101 a system running AFS, in which case they may differ slightly. You
2102 should always use this variable within your makefiles for portability.
2104 installsitearch (sitearch.U):
2105 This variable is really the same as sitearchexp but may differ on
2106 those systems using AFS. For extra portability, only this variable
2107 should be used in makefiles.
2109 installsitelib (sitelib.U):
2110 This variable is really the same as sitelibexp but may differ on
2111 those systems using AFS. For extra portability, only this variable
2112 should be used in makefiles.
2114 installusrbinperl (instubperl.U):
2115 This variable tells whether Perl should be installed also as
2116 /usr/bin/perl in addition to
2119 intsize (intsize.U):
2120 This variable contains the value of the INTSIZE symbol, which
2121 indicates to the C program how many bytes there are in an int.
2123 known_extensions (Extensions.U):
2124 This variable holds a list of all XS extensions included in
2128 This variable is defined but not used by Configure.
2129 The value is a plain '' and is not useful.
2132 This variable contains a flag which will tell the C compiler and loader
2133 to produce a program running with a large memory model. It is up to
2134 the Makefile to use this.
2137 This variable indicates the program to be used to link
2138 libraries for dynamic loading. On some systems, it is 'ld'.
2139 On ELF systems, it should be $cc. Mostly, we'll try to respect
2140 the hint file setting.
2142 lddlflags (dlsrc.U):
2143 This variable contains any special flags that might need to be
2144 passed to $ld to create a shared library suitable for dynamic
2145 loading. It is up to the makefile to use it. For hpux, it
2146 should be '-b'. For sunos 4.1, it is empty.
2148 ldflags (ccflags.U):
2149 This variable contains any additional C loader flags desired by
2150 the user. It is up to the Makefile to use this.
2153 This variable is be used internally by Configure to determine the
2154 full pathname (if any) of the less program. After Configure runs,
2155 the value is reset to a plain "less" and is not useful.
2158 This is an old synonym for _a.
2161 This variable contains the location of the C library.
2163 libperl (libperl.U):
2164 The perl executable is obtained by linking perlmain.c with
2165 libperl, any static extensions (usually just DynaLoader),
2166 and any other libraries needed on this system. libperl
2167 is usually libperl.a, but can also be libperl.so.xxx if
2168 the user wishes to build a perl executable with a shared
2172 This variable holds the general path (space-separated) used to find
2173 libraries. It is intended to be used by other units.
2176 This variable holds the additional libraries we want to use.
2177 It is up to the Makefile to deal with it.
2179 libswanted (Myinit.U):
2180 This variable holds a list of all the libraries we want to
2181 search. The order is chosen to pick up the c library
2182 ahead of ucb or bsd libraries for SVR4.
2185 This variable is defined but not used by Configure.
2186 The value is a plain '' and is not useful.
2189 This variable is defined but not used by Configure.
2190 The value is a plain '' and is not useful.
2192 lkflags (ccflags.U):
2193 This variable contains any additional C partial linker flags desired by
2194 the user. It is up to the Makefile to use this.
2197 This variable is be used internally by Configure to determine the
2198 full pathname (if any) of the ln program. After Configure runs,
2199 the value is reset to a plain "ln" and is not useful.
2202 This variable holds the name of the command to make
2203 symbolic links (if they are supported). It can be used
2204 in the Makefile. It is either 'ln -s' or 'ln'
2206 locincpth (ccflags.U):
2207 This variable contains a list of additional directories to be
2208 searched by the compiler. The appropriate '-I' directives will
2209 be added to ccflags. This is intended to simplify setting
2210 local directories from the Configure command line.
2211 It's not much, but it parallels the loclibpth stuff in libpth.U.
2213 loclibpth (libpth.U):
2214 This variable holds the paths (space-separated) used to find local
2215 libraries. It is prepended to libpth, and is intended to be easily
2216 set from the command line.
2218 longdblsize (d_longdbl.U):
2219 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2220 indicates to the C program how many bytes there are in a long double,
2221 if this system supports long doubles.
2223 longlongsize (d_longlong.U):
2224 This variable contains the value of the LONGLONGSIZE symbol, which
2225 indicates to the C program how many bytes there are in a long long,
2226 if this system supports long long.
2228 longsize (intsize.U):
2229 This variable contains the value of the LONGSIZE symbol, which
2230 indicates to the C program how many bytes there are in a long.
2233 This variable is defined but not used by Configure.
2234 The value is a plain '' and is not useful.
2237 This variable is defined but not used by Configure.
2238 The value is a plain '' and is not useful.
2241 This variable is be used internally by Configure to determine the
2242 full pathname (if any) of the ls program. After Configure runs,
2243 the value is reset to a plain "ls" and is not useful.
2245 lseeksize (lseektype.U):
2246 This variable defines lseektype to be something like off_t, long,
2247 or whatever type is used to declare lseek offset's type in the
2248 kernel (which also appears to be lseek's return type).
2250 lseektype (lseektype.U):
2251 This variable defines lseektype to be something like off_t, long,
2252 or whatever type is used to declare lseek offset's type in the
2253 kernel (which also appears to be lseek's return type).
2256 This variable is defined but not used by Configure.
2257 The value is a plain '' and is not useful.
2260 This variable is defined but not used by Configure.
2261 The value is a plain '' and is not useful.
2264 This variable is be used internally by Configure to determine the
2265 full pathname (if any) of the make program. After Configure runs,
2266 the value is reset to a plain "make" and is not useful.
2268 make_set_make (make.U):
2269 Some versions of 'make' set the variable MAKE. Others do not.
2270 This variable contains the string to be included in Makefile.SH
2271 so that MAKE is set if needed, and not if not needed.
2272 Possible values are:
2273 make_set_make='#' # If your make program handles this for you,
2274 make_set_make="MAKE=$make" # if it doesn't.
2275 I used a comment character so that we can distinguish a
2276 'set' value (from a previous config.sh or Configure '-D' option)
2277 from an uncomputed value.
2279 mallocobj (mallocsrc.U):
2280 This variable contains the name of the malloc.o that this package
2281 generates, if that malloc.o is preferred over the system malloc.
2282 Otherwise the value is null. This variable is intended for generating
2283 Makefiles. See mallocsrc.
2285 mallocsrc (mallocsrc.U):
2286 This variable contains the name of the malloc.c that comes with
2287 the package, if that malloc.c is preferred over the system malloc.
2288 Otherwise the value is null. This variable is intended for generating
2291 malloctype (mallocsrc.U):
2292 This variable contains the kind of ptr returned by malloc and realloc.
2294 man1dir (man1dir.U):
2295 This variable contains the name of the directory in which manual
2296 source pages are to be put. It is the responsibility of the
2297 Makefile.SH to get the value of this into the proper command.
2298 You must be prepared to do the ~name expansion yourself.
2300 man1direxp (man1dir.U):
2301 This variable is the same as the man1dir variable, but is filename
2302 expanded at configuration time, for convenient use in makefiles.
2304 man1ext (man1dir.U):
2305 This variable contains the extension that the manual page should
2306 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2309 man3dir (man3dir.U):
2310 This variable contains the name of the directory in which manual
2311 source pages are to be put. It is the responsibility of the
2312 Makefile.SH to get the value of this into the proper command.
2313 You must be prepared to do the ~name expansion yourself.
2315 man3direxp (man3dir.U):
2316 This variable is the same as the man3dir variable, but is filename
2317 expanded at configuration time, for convenient use in makefiles.
2319 man3ext (man3dir.U):
2320 This variable contains the extension that the manual page should
2321 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2325 This variable is be used internally by Configure to determine the
2326 full pathname (if any) of the Mcc program. After Configure runs,
2327 the value is reset to a plain "Mcc" and is not useful.
2330 This variable contains a flag which will tell the C compiler and loader
2331 to produce a program running with a medium memory model. If the
2332 medium model is not supported, contains the flag to produce large
2333 model programs. It is up to the Makefile to use this.
2335 mips_type (usrinc.U):
2336 This variable holds the environment type for the mips system.
2337 Possible values are "BSD 4.3" and "System V".
2340 This variable is be used internally by Configure to determine the
2341 full pathname (if any) of the mkdir program. After Configure runs,
2342 the value is reset to a plain "mkdir" and is not useful.
2344 mmaptype (d_mmap.U):
2345 This symbol contains the type of pointer returned by mmap()
2346 (and simultaneously the type of the first argument).
2347 It can be 'void *' or 'caddr_t'.
2350 This variable contains the list of memory models supported by this
2351 system. Possible component values are none, split, unsplit, small,
2352 medium, large, and huge. The component values are space separated.
2354 modetype (modetype.U):
2355 This variable defines modetype to be something like mode_t,
2356 int, unsigned short, or whatever type is used to declare file
2357 modes for system calls.
2360 This variable is be used internally by Configure to determine the
2361 full pathname (if any) of the more program. After Configure runs,
2362 the value is reset to a plain "more" and is not useful.
2364 multiarch (multiarch.U):
2365 This variable conditionally defines the MULTIARCH symbol
2366 which signifies the presence of multiplatform files.
2367 This is normally set by hints files.
2370 This variable is defined but not used by Configure.
2371 The value is a plain '' and is not useful.
2373 myarchname (archname.U):
2374 This variable holds the architecture name computed by Configure in
2375 a previous run. It is not intended to be perused by any user and
2376 should never be set in a hint file.
2378 mydomain (myhostname.U):
2379 This variable contains the eventual value of the MYDOMAIN symbol,
2380 which is the domain of the host the program is going to run on.
2381 The domain must be appended to myhostname to form a complete host name.
2382 The dot comes with mydomain, and need not be supplied by the program.
2384 myhostname (myhostname.U):
2385 This variable contains the eventual value of the MYHOSTNAME symbol,
2386 which is the name of the host the program is going to run on.
2387 The domain is not kept with hostname, but must be gotten from mydomain.
2388 The dot comes with mydomain, and need not be supplied by the program.
2390 myuname (Oldconfig.U):
2391 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2392 pseudo variables assignments in the output are stripped, thank you. The
2393 whole thing is then lower-cased.
2396 This variable contains the '-n' flag if that is what causes the echo
2397 command to suppress newline. Otherwise it is null. Correct usage is
2398 $echo $n "prompt for a question: $c".
2400 netdb_hlen_type (netdbtype.U):
2401 This variable holds the type used for the 2nd argument to
2402 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2403 This is only useful if you have gethostbyaddr(), naturally.
2405 netdb_host_type (netdbtype.U):
2406 This variable holds the type used for the 1st argument to
2407 gethostbyaddr(). Usually, this is char * or void *, possibly
2408 with or without a const prefix.
2409 This is only useful if you have gethostbyaddr(), naturally.
2411 netdb_name_type (netdbtype.U):
2412 This variable holds the type used for the argument to
2413 gethostbyname(). Usually, this is char * or const char *.
2414 This is only useful if you have gethostbyname(), naturally.
2416 netdb_net_type (netdbtype.U):
2417 This variable holds the type used for the 1st argument to
2418 getnetbyaddr(). Usually, this is int or long.
2419 This is only useful if you have getnetbyaddr(), naturally.
2422 This variable is be used internally by Configure to determine the
2423 full pathname (if any) of the nm program. After Configure runs,
2424 the value is reset to a plain "nm" and is not useful.
2427 This variable holds the options that may be necessary for nm.
2429 nm_so_opt (usenm.U):
2430 This variable holds the options that may be necessary for nm
2431 to work on a shared library but that can not be used on an
2432 archive library. Currently, this is only used by Linux, where
2433 nm --dynamic is *required* to get symbols from an ELF library which
2434 has been stripped, but nm --dynamic is *fatal* on an archive library.
2435 Maybe Linux should just always set usenm=false.
2437 nonxs_ext (Extensions.U):
2438 This variable holds a list of all non-xs extensions included
2439 in the package. All of them will be built.
2442 This variable is be used internally by Configure to determine the
2443 full pathname (if any) of the nroff program. After Configure runs,
2444 the value is reset to a plain "nroff" and is not useful.
2446 o_nonblock (nblock_io.U):
2447 This variable bears the symbol value to be used during open() or fcntl()
2448 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2449 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2450 but that is only supported by some devices.
2453 This is an old synonym for _o.
2455 old_pthread_create_joinable (d_pthrattrj.U):
2456 This variable defines the constant to use for creating joinable
2457 (aka undetached) pthreads. Unused if pthread.h defines
2458 PTHREAD_CREATE_JOINABLE. If used, possible values are
2459 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2461 optimize (ccflags.U):
2462 This variable contains any optimizer/debugger flag that should be used.
2463 It is up to the Makefile to use it.
2465 orderlib (orderlib.U):
2466 This variable is "true" if the components of libraries must be ordered
2467 (with `lorder $* | tsort`) before placing them in an archive. Set to
2468 "false" if ranlib or ar can generate random libraries.
2470 osname (Oldconfig.U):
2471 This variable contains the operating system name (e.g. sunos,
2472 solaris, hpux, etc.). It can be useful later on for setting
2473 defaults. Any spaces are replaced with underscores. It is set
2474 to a null string if we can't figure it out.
2476 osvers (Oldconfig.U):
2477 This variable contains the operating system version (e.g.
2478 4.1.3, 5.2, etc.). It is primarily used for helping select
2479 an appropriate hints file, but might be useful elsewhere for
2480 setting defaults. It is set to '' if we can't figure it out.
2481 We try to be flexible about how much of the version number
2482 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2483 same for this package, hints files might just be os_4.0 or
2484 os_4.1, etc., not keeping separate files for each little release.
2486 package (package.U):
2487 This variable contains the name of the package being constructed.
2488 It is primarily intended for the use of later Configure units.
2491 This variable contains the name of the preferred pager on the system.
2492 Usual values are (the full pathnames of) more, less, pg, or cat.
2495 This variable contains a command that produces the text of the
2496 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2497 "ypcat passwd" when NIS is used.
2499 patchlevel (patchlevel.U):
2500 The patchlevel level of this package.
2501 The value of patchlevel comes from the patchlevel.h file.
2504 This is an old synonym for p_ in Head.U, the character
2505 used to separate elements in the command shell search PATH.
2508 This variable is defined but not used by Configure.
2509 The value is a plain '' and is not useful.
2511 perladmin (perladmin.U):
2512 Electronic mail address of the perl5 administrator.
2514 perlpath (perlpath.U):
2515 This variable contains the eventual value of the PERLPATH symbol,
2516 which contains the name of the perl interpreter to be used in
2517 shell scripts and in the "eval 'exec'" idiom.
2520 This variable is be used internally by Configure to determine the
2521 full pathname (if any) of the pg program. After Configure runs,
2522 the value is reset to a plain "pg" and is not useful.
2524 phostname (myhostname.U):
2525 This variable contains the eventual value of the PHOSTNAME symbol,
2526 which is a command that can be fed to popen() to get the host name.
2527 The program should probably not presume that the domain is or isn't
2530 pidtype (pidtype.U):
2531 This variable defines PIDTYPE to be something like pid_t, int,
2532 ushort, or whatever type is used to declare process ids in the kernel.
2535 Holds the private path used by Configure to find out the libraries.
2536 Its value is prepend to libpth. This variable takes care of special
2537 machines, like the mips. Usually, it should be empty.
2540 This variable is defined but not used by Configure.
2541 The value is a plain '' and is not useful.
2544 This variable is defined but not used by Configure.
2545 The value is a plain '' and is not useful.
2548 This variable holds the name of the directory below which the
2549 user will install the package. Usually, this is /usr/local, and
2550 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2551 man pages in /usr/local/man, etc. It is only used to set defaults
2552 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2554 prefixexp (prefix.U):
2555 This variable holds the full absolute path of the directory below
2556 which the user will install the package. Derived from prefix.
2558 privlib (privlib.U):
2559 This variable contains the eventual value of the PRIVLIB symbol,
2560 which is the name of the private library for this package. It may
2561 have a ~ on the front. It is up to the makefile to eventually create
2562 this directory while performing installation (with ~ substitution).
2564 privlibexp (privlib.U):
2565 This variable is the ~name expanded version of privlib, so that you
2566 may use it directly in Makefiles or shell scripts.
2568 prototype (prototype.U):
2569 This variable holds the eventual value of CAN_PROTOTYPE, which
2570 indicates the C compiler can handle funciton prototypes.
2572 ptrsize (ptrsize.U):
2573 This variable contains the value of the PTRSIZE symbol, which
2574 indicates to the C program how many bytes there are in a pointer.
2576 randbits (randfunc.U):
2577 Indicates how many bits are produced by the function used to
2578 generate normalized random numbers.
2580 randfunc (randfunc.U):
2581 Indicates the name of the random number function to use.
2582 Values include drand48, random, and rand. In C programs,
2583 the 'Drand01' macro is defined to generate uniformly distributed
2584 random numbers over the range [0., 1.[ (see drand01 and nrand).
2586 randseedtype (randfunc.U):
2587 Indicates the type of the argument of the seedfunc.
2589 ranlib (orderlib.U):
2590 This variable is set to the pathname of the ranlib program, if it is
2591 needed to generate random libraries. Set to ":" if ar can generate
2592 random libraries or if random libraries are not supported
2594 rd_nodata (nblock_io.U):
2595 This variable holds the return code from read() when no data is
2596 present. It should be -1, but some systems return 0 when O_NDELAY is
2597 used, which is a shame because you cannot make the difference between
2598 no data and an EOF.. Sigh!
2601 This variable is be used internally by Configure to determine the
2602 full pathname (if any) of the rm program. After Configure runs,
2603 the value is reset to a plain "rm" and is not useful.
2606 This variable is defined but not used by Configure.
2607 The value is a plain '' and is not useful.
2610 This variable contains 'true' or 'false' depending whether the
2611 nm extraction should be performed or not, according to the value
2612 of usenm and the flags on the Configure command line.
2614 sched_yield (d_pthread_y.U):
2615 This variable defines the way to yield the execution
2616 of the current thread.
2618 scriptdir (scriptdir.U):
2619 This variable holds the name of the directory in which the user wants
2620 to put publicly scripts for the package in question. It is either
2621 the same directory as for binaries, or a special one that can be
2622 mounted across different architectures, like /usr/share. Programs
2623 must be prepared to deal with ~name expansion.
2625 scriptdirexp (scriptdir.U):
2626 This variable is the same as scriptdir, but is filename expanded
2627 at configuration time, for programs not wanting to bother with it.
2630 This variable is be used internally by Configure to determine the
2631 full pathname (if any) of the sed program. After Configure runs,
2632 the value is reset to a plain "sed" and is not useful.
2634 seedfunc (randfunc.U):
2635 Indicates the random number generating seed function.
2636 Values include srand48, srandom, and srand.
2638 selectminbits (selectminbits.U):
2639 This variable holds the minimum number of bits operated by select.
2640 That is, if you do select(n, ...), how many bits at least will be
2641 cleared in the masks if some activity is detected. Usually this
2642 is either n or 32*ceil(n/32), especially many little-endians do
2643 the latter. This is only useful if you have select(), naturally.
2645 selecttype (selecttype.U):
2646 This variable holds the type used for the 2nd, 3rd, and 4th
2647 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2648 is defined, and 'int *' otherwise. This is only useful if you
2649 have select(), naturally.
2652 This variable is defined but not used by Configure.
2653 The value is a plain '' and is not useful.
2656 This variable contains the full pathname of the shell used
2657 on this system to execute Bourne shell scripts. Usually, this will be
2658 /bin/sh, though it's possible that some systems will have /bin/ksh,
2659 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2661 This unit comes before Options.U, so you can't set sh with a '-D'
2662 option, though you can override this (and startsh)
2663 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2666 This variable is defined but not used by Configure.
2667 The value is a plain '' and is not useful.
2669 sharpbang (spitshell.U):
2670 This variable contains the string #! if this system supports that
2673 shmattype (d_shmat.U):
2674 This symbol contains the type of pointer returned by shmat().
2675 It can be 'void *' or 'char *'.
2677 shortsize (intsize.U):
2678 This variable contains the value of the SHORTSIZE symbol which
2679 indicates to the C program how many bytes there are in a short.
2681 shrpenv (libperl.U):
2682 If the user builds a shared libperl.so, then we need to tell the
2683 'perl' executable where it will be able to find the installed libperl.so.
2684 One way to do this on some systems is to set the environment variable
2685 LD_RUN_PATH to the directory that will be the final location of the
2686 shared libperl.so. The makefile can use this with something like
2687 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2689 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2692 See the main perl Makefile.SH for actual working usage.
2693 Alternatively, we might be able to use a command line option such
2694 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2695 $archlibexp/CORE (Linux).
2697 shsharp (spitshell.U):
2698 This variable tells further Configure units whether your sh can
2701 sig_count (sig_name.U):
2702 This variable holds a number larger than the largest valid
2703 signal number. This is usually the same as the NSIG macro.
2705 sig_name (sig_name.U):
2706 This variable holds the signal names, space separated. The leading
2707 SIG in signal name is removed. A ZERO is prepended to the
2708 list. This is currently not used.
2710 sig_name_init (sig_name.U):
2711 This variable holds the signal names, enclosed in double quotes and
2712 separated by commas, suitable for use in the SIG_NAME definition
2713 below. A "ZERO" is prepended to the list, and the list is
2714 terminated with a plain 0. The leading SIG in signal names
2715 is removed. See sig_num.
2717 sig_num (sig_name.U):
2718 This variable holds the signal numbers, space separated. A ZERO is
2719 prepended to the list (corresponding to the fake SIGZERO), and
2720 the list is terminated with a 0. Those numbers correspond to
2721 the value of the signal listed in the same place within the
2724 sig_num_init (sig_name.U):
2725 This variable holds the signal numbers, enclosed in double quotes and
2726 separated by commas, suitable for use in the SIG_NUM definition
2727 below. A "ZERO" is prepended to the list, and the list is
2728 terminated with a plain 0.
2730 signal_t (d_voidsig.U):
2731 This variable holds the type of the signal handler (void or int).
2733 sitearch (sitearch.U):
2734 This variable contains the eventual value of the SITEARCH symbol,
2735 which is the name of the private library for this package. It may
2736 have a ~ on the front. It is up to the makefile to eventually create
2737 this directory while performing installation (with ~ substitution).
2739 sitearchexp (sitearch.U):
2740 This variable is the ~name expanded version of sitearch, so that you
2741 may use it directly in Makefiles or shell scripts.
2743 sitelib (sitelib.U):
2744 This variable contains the eventual value of the SITELIB symbol,
2745 which is the name of the private library for this package. It may
2746 have a ~ on the front. It is up to the makefile to eventually create
2747 this directory while performing installation (with ~ substitution).
2749 sitelibexp (sitelib.U):
2750 This variable is the ~name expanded version of sitelib, so that you
2751 may use it directly in Makefiles or shell scripts.
2753 sizetype (sizetype.U):
2754 This variable defines sizetype to be something like size_t,
2755 unsigned long, or whatever type is used to declare length
2756 parameters for string functions.
2759 This variable is defined but not used by Configure.
2760 The value is a plain '' and is not useful.
2763 This variable is defined but not used by Configure.
2764 The value is a plain '' and is not useful.
2767 This variable contains a flag which will tell the C compiler and loader
2768 to produce a program running with a small memory model. It is up to
2769 the Makefile to use this.
2772 This variable holds the extension used to identify shared libraries
2773 (also known as shared objects) on the system. Usually set to 'so'.
2775 sockethdr (d_socket.U):
2776 This variable has any cpp '-I' flags needed for socket support.
2778 socketlib (d_socket.U):
2779 This variable has the names of any libraries needed for socket support.
2782 This variable is be used internally by Configure to determine the
2783 full pathname (if any) of the sort program. After Configure runs,
2784 the value is reset to a plain "sort" and is not useful.
2786 spackage (package.U):
2787 This variable contains the name of the package being constructed,
2788 with the first letter uppercased, i.e. suitable for starting
2791 spitshell (spitshell.U):
2792 This variable contains the command necessary to spit out a runnable
2793 shell on this system. It is either cat or a grep '-v' for # comments.
2796 This variable contains a flag which will tell the C compiler and loader
2797 to produce a program that will run in separate I and D space, for those
2798 machines that support separation of instruction and data space. It is
2799 up to the Makefile to use this.
2802 This variable holds the path to the package source. It is up to
2803 the Makefile to use this variable and set VPATH accordingly to
2804 find the sources remotely.
2806 ssizetype (ssizetype.U):
2807 This variable defines ssizetype to be something like ssize_t,
2808 long or int. It is used by functions that return a count
2809 of bytes or an error condition. It must be a signed type.
2810 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2812 startperl (startperl.U):
2813 This variable contains the string to put on the front of a perl
2814 script to make sure (hopefully) that it runs with perl and not some
2815 shell. Of course, that leading line must be followed by the classical
2817 eval 'exec perl -S $0 ${1+"$@"}'
2818 if $running_under_some_shell;
2819 to guarantee perl startup should the shell execute the script. Note
2820 that this magic incatation is not understood by csh.
2822 startsh (startsh.U):
2823 This variable contains the string to put on the front of a shell
2824 script to make sure (hopefully) that it runs with sh and not some
2827 static_ext (Extensions.U):
2828 This variable holds a list of XS extension files we want to
2829 link statically into the package. It is used by Makefile.
2831 stdchar (stdchar.U):
2832 This variable conditionally defines STDCHAR to be the type of char
2833 used in stdio.h. It has the values "unsigned char" or "char".
2835 stdio_base (d_stdstdio.U):
2836 This variable defines how, given a FILE pointer, fp, to access the
2837 _base field (or equivalent) of stdio.h's FILE structure. This will
2838 be used to define the macro FILE_base(fp).
2840 stdio_bufsiz (d_stdstdio.U):
2841 This variable defines how, given a FILE pointer, fp, to determine
2842 the number of bytes store in the I/O buffer pointer to by the
2843 _base field (or equivalent) of stdio.h's FILE structure. This will
2844 be used to define the macro FILE_bufsiz(fp).
2846 stdio_cnt (d_stdstdio.U):
2847 This variable defines how, given a FILE pointer, fp, to access the
2848 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2849 be used to define the macro FILE_cnt(fp).
2851 stdio_filbuf (d_stdstdio.U):
2852 This variable defines how, given a FILE pointer, fp, to tell
2853 stdio to refill it's internal buffers (?). This will
2854 be used to define the macro FILE_filbuf(fp).
2856 stdio_ptr (d_stdstdio.U):
2857 This variable defines how, given a FILE pointer, fp, to access the
2858 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2859 be used to define the macro FILE_ptr(fp).
2861 stdio_stream_array (stdio_streams.U):
2862 This variable tells the name of the array holding the stdio streams.
2863 Usual values include _iob, __iob, and __sF.
2865 strings (i_string.U):
2866 This variable holds the full path of the string header that will be
2867 used. Typically /usr/include/string.h or /usr/include/strings.h.
2870 This variable is defined but not used by Configure.
2871 The value is a plain '' and is not useful.
2873 subversion (patchlevel.U):
2874 The subversion level of this package.
2875 The value of subversion comes from the patchlevel.h file.
2876 This is unique to perl.
2879 This variable holds the place where the manual is located on this
2880 system. It is not the place where the user wants to put his manual
2881 pages. Rather it is the place where Configure may look to find manual
2882 for unix commands (section 1 of the manual usually). See mansrc.
2885 This variable is defined but not used by Configure.
2886 The value is a plain '' and is not useful.
2889 This variable is defined but not used by Configure.
2890 The value is a plain '' and is not useful.
2893 This variable is defined but not used by Configure.
2894 The value is a plain '' and is not useful.
2897 This variable is defined but not used by Configure.
2898 The value is a plain '' and is not useful.
2901 This variable is be used internally by Configure to determine the
2902 full pathname (if any) of the test program. After Configure runs,
2903 the value is reset to a plain "test" and is not useful.
2905 timeincl (i_time.U):
2906 This variable holds the full path of the included time header(s).
2908 timetype (d_time.U):
2909 This variable holds the type returned by time(). It can be long,
2910 or time_t on BSD sites (in which case <sys/types.h> should be
2911 included). Anyway, the type Time_t should be used.
2914 This variable is be used internally by Configure to determine the
2915 full pathname (if any) of the touch program. After Configure runs,
2916 the value is reset to a plain "touch" and is not useful.
2919 This variable is be used internally by Configure to determine the
2920 full pathname (if any) of the tr program. After Configure runs,
2921 the value is reset to a plain "tr" and is not useful.
2924 This variable contains the value to be passed to the tr(1)
2925 command to transliterate a newline. Typical values are
2926 '\012' and '\n'. This is needed for EBCDIC systems where
2927 newline is not necessarily '\012'.
2930 This variable is defined but not used by Configure.
2931 The value is a plain '' and is not useful.
2933 uidtype (uidtype.U):
2934 This variable defines Uid_t to be something like uid_t, int,
2935 ushort, or whatever type is used to declare user ids in the kernel.
2938 This variable is be used internally by Configure to determine the
2939 full pathname (if any) of the uname program. After Configure runs,
2940 the value is reset to a plain "uname" and is not useful.
2943 This variable is be used internally by Configure to determine the
2944 full pathname (if any) of the uniq program. After Configure runs,
2945 the value is reset to a plain "uniq" and is not useful.
2947 use64bits (use64bits.U):
2948 This variable conditionally defines the USE_64_BITS symbol,
2949 and indicates that explicit 64-bit interfaces should be used
2953 This variable indicates if the the system supports dynamic
2954 loading of some sort. See also dlsrc and dlobj.
2956 usemultiplicity (usemultiplicity.U):
2957 This variable conditionally defines the MULTIPLICITY symbol,
2958 and indicates that Perl should be built to use multiplicity.
2960 usemymalloc (mallocsrc.U):
2961 This variable contains y if the malloc that comes with this package
2962 is desired over the system's version of malloc. People often include
2963 special versions of malloc for effiency, but such versions are often
2964 less portable. See also mallocsrc and mallocobj.
2965 If this is 'y', then -lmalloc is removed from $libs.
2968 This variable contains 'true' or 'false' depending whether the
2969 nm extraction is wanted or not.
2971 useopcode (Extensions.U):
2972 This variable holds either 'true' or 'false' to indicate
2973 whether the Opcode extension should be used. The sole
2974 use for this currently is to allow an easy mechanism
2975 for users to skip the Opcode extension from the Configure
2978 useperlio (useperlio.U):
2979 This variable conditionally defines the USE_PERLIO symbol,
2980 and indicates that the PerlIO abstraction should be
2983 useposix (Extensions.U):
2984 This variable holds either 'true' or 'false' to indicate
2985 whether the POSIX extension should be used. The sole
2986 use for this currently is to allow an easy mechanism
2987 for hints files to indicate that POSIX will not compile
2988 on a particular system.
2991 This variable is set to true when the user agrees to use sfio.
2992 It is set to false when sfio is not available or when the user
2993 explicitely requests not to use sfio. It is here primarily so
2994 that command-line settings can override the auto-detection of
2995 d_sfio without running into a "WHOA THERE".
2997 useshrplib (libperl.U):
2998 This variable is set to 'yes' if the user wishes
2999 to build a shared libperl, and 'no' otherwise.
3001 usethreads (usethreads.U):
3002 This variable conditionally defines the USE_THREADS symbol,
3003 and indicates that Perl should be built to use threads.
3005 usevfork (d_vfork.U):
3006 This variable is set to true when the user accepts to use vfork.
3007 It is set to false when no vfork is available or when the user
3008 explicitely requests not to use vfork.
3011 This variable holds the path of the include files, which is
3012 usually /usr/include. It is mainly used by other Configure units.
3015 This variable is defined but not used by Configure.
3016 The value is a plain '' and is not useful.
3018 version (patchlevel.U):
3019 The full version number of this package. This combines
3020 baserev, patchlevel, and subversion to get the full
3021 version number, including any possible subversions. Care
3022 is taken to use the C locale in order to get something
3023 like 5.004 instead of 5,004. This is unique to perl.
3026 This variable is defined but not used by Configure.
3027 The value is a plain '' and is not useful.
3029 voidflags (voidflags.U):
3030 This variable contains the eventual value of the VOIDFLAGS symbol,
3031 which indicates how much support of the void type is given by this
3032 compiler. See VOIDFLAGS for more info.
3035 This variable holds extra path (space-separated) used to find
3036 libraries on this platform, for example CPU-specific libraries
3037 (on multi-CPU platforms) may be listed here.
3040 This variable is defined but not used by Configure.
3041 The value is a plain '' and is not useful.
3044 This variable is be used internally by Configure to determine the
3045 full pathname (if any) of the zip program. After Configure runs,
3046 the value is reset to a plain "zip" and is not useful.