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 is be used internally by Configure to determine the
9 full pathname (if any) of the Mcc program. After Configure runs,
10 the value is reset to a plain "Mcc" and is not useful.
13 This variable defines the extension used for ordinary libraries.
14 For unix, it is '.a'. The '.' is included. Other possible
15 values include '.lib'.
18 This variable defines the extension used for executable files.
19 For unix it is empty. Other possible values include '.exe'.
22 This variable defines the extension used for object files.
23 For unix, it is '.o'. The '.' is included. Other possible
24 values include '.obj'.
27 This variable is set to 'true' if AFS (Andrew File System) is used
28 on the system, 'false' otherwise. It is possible to override this
29 with a hint value or command line option, but you'd better know
32 alignbytes (alignbytes.U):
33 This variable holds the number of bytes required to align a
34 double. Usual values are 2, 4 and 8.
36 ansi2knr (ansi2knr.U):
37 This variable is set if the user needs to run ansi2knr.
38 Currently, this is not supported, so we just abort.
40 aphostname (d_gethname.U):
41 Thie variable contains the command which can be used to compute the
42 host name. The command is fully qualified by its absolute path, to make
43 it safe when used by a process with super-user privileges.
45 apiversion (patchlevel.U):
46 This is a number which identifies the lowest version of perl
47 to have an API (for XS extensions) compatible with the present
48 version. For example, for 5.005_01, the apiversion should be
49 5.005, since 5.005_01 should be binary compatible with 5.005.
50 This should probably be incremented manually somehow, perhaps
51 from patchlevel.h. For now, we'll guess maintenance subversions
52 will retain binary compatibility.
55 This variable is be used internally by Configure to determine the
56 full pathname (if any) of the ar program. After Configure runs,
57 the value is reset to a plain "ar" and is not useful.
60 This variable holds the name of the directory in which the user wants
61 to put architecture-dependent public library files for $package.
62 It is most often a local directory such as /usr/local/lib.
63 Programs using this variable must be prepared to deal
64 with filename expansion.
66 archlibexp (archlib.U):
67 This variable is the same as the archlib variable, but is
68 filename expanded at configuration time, for convenient use.
70 archname (archname.U):
71 This variable is a short name to characterize the current
72 architecture. It is used mainly to construct the default archlib.
75 This variable defines any additional objects that must be linked
76 in with the program on this architecture. On unix, it is usually
77 empty. It is typically used to include emulations of unix calls
78 or other facilities. For perl on OS/2, for example, this would
82 This variable is be used internally by Configure to determine the
83 full pathname (if any) of the awk program. After Configure runs,
84 the value is reset to a plain "awk" and is not useful.
87 The base revision level of this package, from the .package file.
90 This variable is defined but not used by Configure.
91 The value is a plain '' and is not useful.
94 This variable holds the name of the directory in which the user wants
95 to put publicly executable images for the package in question. It
96 is most often a local directory such as /usr/local/bin. Programs using
97 this variable must be prepared to deal with ~name substitution.
100 This is the same as the bin variable, but is filename expanded at
101 configuration time, for use in your makefiles.
104 This variable is defined but not used by Configure.
105 The value is a plain '' and is not useful.
108 This variable is be used internally by Configure to determine the
109 full pathname (if any) of the byacc program. After Configure runs,
110 the value is reset to a plain "byacc" and is not useful.
112 byteorder (byteorder.U):
113 This variable holds the byte order. In the following, larger digits
114 indicate more significance. The variable byteorder is either 4321
115 on a big-endian machine, or 1234 on a little-endian, or 87654321
116 on a Cray ... or 3412 with weird order !
119 This variable contains the \c string if that is what causes the echo
120 command to suppress newline. Otherwise it is null. Correct usage is
121 $echo $n "prompt for a question: $c".
123 castflags (d_castneg.U):
124 This variable contains a flag that precise difficulties the
125 compiler has casting odd floating values to unsigned long:
127 1 = couldn't cast < 0
128 2 = couldn't cast >= 0x80000000
129 4 = couldn't cast in argument expression list
132 This variable is be used internally by Configure to determine the
133 full pathname (if any) of the cat program. After Configure runs,
134 the value is reset to a plain "cat" and is not useful.
137 This variable holds the name of a command to execute a C compiler which
138 can resolve multiple global references that happen to have the same
139 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
141 cccdlflags (dlsrc.U):
142 This variable contains any special flags that might need to be
143 passed with 'cc -c' to compile modules to be used to create a shared
144 library that will be used for dynamic loading. For hpux, this
145 should be +z. It is up to the makefile to use it.
148 This variable contains any special flags that might need to be
149 passed to cc to link with a shared library for dynamic loading.
150 It is up to the makefile to use it. For sunos 4.1, it should
154 This variable contains any additional C compiler flags desired by
155 the user. It is up to the Makefile to use this.
158 Login name of the person who ran the Configure script and answered the
159 questions. This is used to tag both config.sh and config_h.SH.
161 cf_email (cf_email.U):
162 Electronic mail address of the person who ran Configure. This can be
163 used by units that require the user's e-mail, like MailList.U.
166 Holds the output of the "date" command when the configuration file was
167 produced. This is used to tag both config.sh and config_h.SH.
170 This variable is defined but not used by Configure.
171 The value is a plain '' and is not useful.
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.
181 clocktype (d_times.U):
182 This variable holds the type returned by times(). It can be long,
183 or clock_t on BSD sites (in which case <sys/types.h> should be
187 This variable is be used internally by Configure to determine the
188 full pathname (if any) of the comm program. After Configure runs,
189 the value is reset to a plain "comm" and is not useful.
192 This variable is defined but not used by Configure.
193 The value is a plain '' and is not useful.
195 contains (contains.U):
196 This variable holds the command to do a grep with a proper return
197 status. On most sane systems it is simply "grep". On insane systems
198 it is a grep followed by a cat followed by a test. This variable
199 is primarily for the use of other Configure units.
202 This variable is be used internally by Configure to determine the
203 full pathname (if any) of the cp program. After Configure runs,
204 the value is reset to a plain "cp" and is not useful.
207 This variable is defined but not used by Configure.
208 The value is a plain '' and is not useful.
211 This variable is be used internally by Configure to determine the
212 full pathname (if any) of the cpp program. After Configure runs,
213 the value is reset to a plain "cpp" and is not useful.
215 cpp_stuff (cpp_stuff.U):
216 This variable contains an identification of the catenation mechanism
217 used by the C preprocessor.
219 cppflags (ccflags.U):
220 This variable holds the flags that will be passed to the C pre-
221 processor. It is up to the Makefile to use it.
223 cpplast (cppstdin.U):
224 This variable has the same functionality as cppminus, only it applies to
225 cpprun and not cppstdin.
227 cppminus (cppstdin.U):
228 This variable contains the second part of the string which will invoke
229 the C preprocessor on the standard input and produce to standard
230 output. This variable will have the value "-" if cppstdin needs a minus
231 to specify standard input, otherwise the value is "".
234 This variable contains the command which will invoke a C preprocessor
235 on standard input and put the output to stdout. It is guaranteed not
236 to be a wrapper and may be a null string if no preprocessor can be
237 made directly available. This preprocessor might be different from the
238 one used by the C compiler. Don't forget to append cpplast after the
239 preprocessor options.
241 cppstdin (cppstdin.U):
242 This variable contains the command which will invoke the C
243 preprocessor on standard input and put the output to stdout.
244 It is primarily used by other Configure units that ask about
245 preprocessor symbols.
247 cryptlib (d_crypt.U):
248 This variable holds -lcrypt or the path to a libcrypt.a archive if
249 the crypt() function is not defined in the standard C library. It is
250 up to the Makefile to use this.
253 This variable is be used internally by Configure to determine the
254 full pathname (if any) of the csh program. After Configure runs,
255 the value is reset to a plain "csh" and is not useful.
257 d_Gconvert (d_gconvert.U):
258 This variable holds what Gconvert is defined as to convert
259 floating point numbers into strings. It could be 'gconvert'
260 or a more complex macro emulating gconvert with gcvt() or sprintf.
262 d_access (d_access.U):
263 This variable conditionally defines HAS_ACCESS if the access() system
264 call is available to check for access permissions using real IDs.
267 This variable conditionally defines the HAS_ALARM symbol, which
268 indicates to the C program that the alarm() routine is available.
270 d_archlib (archlib.U):
271 This variable conditionally defines ARCHLIB to hold the pathname
272 of architecture-dependent library files for $package. If
273 $archlib is the same as $privlib, then this is set to undef.
275 d_attribut (d_attribut.U):
276 This variable conditionally defines HASATTRIBUTE, which
277 indicates the C compiler can check for function attributes,
278 such as printf formats.
281 This variable conditionally defines the HAS_BCMP symbol if
282 the bcmp() routine is available to compare strings.
285 This variable conditionally defines the HAS_BCOPY symbol if
286 the bcopy() routine is available to copy strings.
289 This symbol conditionally defines the symbol BSD when running on a
292 d_bsdgetpgrp (d_getpgrp.U):
293 This variable conditionally defines USE_BSD_GETPGRP if
294 getpgrp needs one arguments whereas USG one needs none.
296 d_bsdsetpgrp (d_setpgrp.U):
297 This variable conditionally defines USE_BSD_SETPGRP if
298 setpgrp needs two arguments whereas USG one needs none.
299 See also d_setpgid for a POSIX interface.
302 This variable conditionally defines the HAS_BZERO symbol if
303 the bzero() routine is available to set memory to 0.
305 d_casti32 (d_casti32.U):
306 This variable conditionally defines CASTI32, which indicates
307 whether the C compiler can cast large floats to 32-bit ints.
309 d_castneg (d_castneg.U):
310 This variable conditionally defines CASTNEG, which indicates
311 wether the C compiler can cast negative float to unsigned.
313 d_charvspr (d_vprintf.U):
314 This variable conditionally defines CHARVSPRINTF if this system
315 has vsprintf returning type (char*). The trend seems to be to
316 declare it as "int vsprintf()".
319 This variable conditionally defines the HAS_CHOWN symbol, which
320 indicates to the C program that the chown() routine is available.
322 d_chroot (d_chroot.U):
323 This variable conditionally defines the HAS_CHROOT symbol, which
324 indicates to the C program that the chroot() routine is available.
326 d_chsize (d_chsize.U):
327 This variable conditionally defines the CHSIZE symbol, which
328 indicates to the C program that the chsize() routine is available
329 to truncate files. You might need a -lx to get this routine.
331 d_closedir (d_closedir.U):
332 This variable conditionally defines HAS_CLOSEDIR if closedir() is
336 This variable conditionally defines the HASCONST symbol, which
337 indicates to the C program that this C compiler knows about the
341 This variable conditionally defines the CRYPT symbol, which
342 indicates to the C program that the crypt() routine is available
343 to encrypt passwords and the like.
346 This variable conditionally defines the CSH symbol, which
347 indicates to the C program that the C-shell exists.
349 d_cuserid (d_cuserid.U):
350 This variable conditionally defines the HAS_CUSERID symbol, which
351 indicates to the C program that the cuserid() routine is available
352 to get character login names.
354 d_dbl_dig (d_dbl_dig.U):
355 This variable conditionally defines d_dbl_dig if this system's
356 header files provide DBL_DIG, which is the number of significant
357 digits in a double precision number.
359 d_difftime (d_difftime.U):
360 This variable conditionally defines the HAS_DIFFTIME symbol, which
361 indicates to the C program that the difftime() routine is available.
363 d_dirnamlen (i_dirent.U):
364 This variable conditionally defines DIRNAMLEN, which indicates
365 to the C program that the length of directory entry names is
366 provided by a d_namelen field.
368 d_dlerror (d_dlerror.U):
369 This variable conditionally defines the HAS_DLERROR symbol, which
370 indicates to the C program that the dlerror() routine is available.
372 d_dlopen (d_dlopen.U):
373 This variable conditionally defines the HAS_DLOPEN symbol, which
374 indicates to the C program that the dlopen() routine is available.
376 d_dlsymun (d_dlsymun.U):
377 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
378 indicates that we need to prepend an underscore to the symbol
379 name before calling dlsym().
381 d_dosuid (d_dosuid.U):
382 This variable conditionally defines the symbol DOSUID, which
383 tells the C program that it should insert setuid emulation code
384 on hosts which have setuid #! scripts disabled.
387 This variable conditionally defines HAS_DUP2 if dup2() is
388 available to duplicate file descriptors.
390 d_endhent (d_endhent.U):
391 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
392 available to close whatever was being used for host queries.
394 d_endnent (d_endnent.U):
395 This variable conditionally defines HAS_ENDNETENT if endnetent() is
396 available to close whatever was being used for network queries.
398 d_endpent (d_endpent.U):
399 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
400 available to close whatever was being used for protocol queries.
402 d_endsent (d_endsent.U):
403 This variable conditionally defines HAS_ENDSERVENT if endservent() is
404 available to close whatever was being used for service queries.
406 d_eofnblk (nblock_io.U):
407 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
408 when reading from a non-blocking I/O source.
411 This variable conditionally defines the symbols EUNICE and VAX, which
412 alerts the C program that it must deal with ideosyncracies of VMS.
414 d_fchmod (d_fchmod.U):
415 This variable conditionally defines the HAS_FCHMOD symbol, which
416 indicates to the C program that the fchmod() routine is available
417 to change mode of opened files.
419 d_fchown (d_fchown.U):
420 This variable conditionally defines the HAS_FCHOWN symbol, which
421 indicates to the C program that the fchown() routine is available
422 to change ownership of opened files.
425 This variable conditionally defines the HAS_FCNTL symbol, and indicates
426 whether the fcntl() function exists
428 d_fd_macros (d_fd_set.U):
429 This variable contains the eventual value of the HAS_FD_MACROS symbol,
430 which indicates if your C compiler knows about the macros which
431 manipulate an fd_set.
433 d_fd_set (d_fd_set.U):
434 This variable contains the eventual value of the HAS_FD_SET symbol,
435 which indicates if your C compiler knows about the fd_set typedef.
437 d_fds_bits (d_fd_set.U):
438 This variable contains the eventual value of the HAS_FDS_BITS symbol,
439 which indicates if your fd_set typedef contains the fds_bits member.
440 If you have an fd_set typedef, but the dweebs who installed it did
441 a half-fast job and neglected to provide the macros to manipulate
442 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
444 d_fgetpos (d_fgetpos.U):
445 This variable conditionally defines HAS_FGETPOS if fgetpos() is
446 available to get the file position indicator.
448 d_flexfnam (d_flexfnam.U):
449 This variable conditionally defines the FLEXFILENAMES symbol, which
450 indicates that the system supports filenames longer than 14 characters.
453 This variable conditionally defines HAS_FLOCK if flock() is
454 available to do file locking.
457 This variable conditionally defines the HAS_FORK symbol, which
458 indicates to the C program that the fork() routine is available.
460 d_fpathconf (d_pathconf.U):
461 This variable conditionally defines the HAS_FPATHCONF symbol, which
462 indicates to the C program that the pathconf() routine is available
463 to determine file-system related limits and options associated
464 with a given open file descriptor.
466 d_fsetpos (d_fsetpos.U):
467 This variable conditionally defines HAS_FSETPOS if fsetpos() is
468 available to set the file position indicator.
471 This variable conditionally defines the HAS_FTIME symbol, which indicates
472 that the ftime() routine exists. The ftime() routine is basically
473 a sub-second accuracy clock.
475 d_getgrps (d_getgrps.U):
476 This variable conditionally defines the HAS_GETGROUPS symbol, which
477 indicates to the C program that the getgroups() routine is available
478 to get the list of process groups.
480 d_gethbyaddr (d_gethbyad.U):
481 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
482 indicates to the C program that the gethostbyaddr() routine is available
483 to look up hosts by their IP addresses.
485 d_gethbyname (d_gethbynm.U):
486 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
487 indicates to the C program that the gethostbyname() routine is available
488 to look up host names in some data base or other.
490 d_gethent (d_gethent.U):
491 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
492 available to look up host names in some data base or another.
494 d_gethname (d_gethname.U):
495 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
496 indicates to the C program that the gethostname() routine may be
497 used to derive the host name.
499 d_gethostprotos (d_gethostprotos.U):
500 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
501 which indicates to the C program that <netdb.h> supplies
502 prototypes for the various gethost*() functions.
503 See also netdbtype.U for probing for various netdb types.
505 d_getlogin (d_getlogin.U):
506 This variable conditionally defines the HAS_GETLOGIN symbol, which
507 indicates to the C program that the getlogin() routine is available
508 to get the login name.
510 d_getnbyaddr (d_getnbyad.U):
511 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
512 indicates to the C program that the getnetbyaddr() routine is available
513 to look up networks by their IP addresses.
515 d_getnbyname (d_getnbynm.U):
516 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
517 indicates to the C program that the getnetbyname() routine is available
518 to look up networks by their names.
520 d_getnent (d_getnent.U):
521 This variable conditionally defines HAS_GETNETENT if getnetent() is
522 available to look up network names in some data base or another.
524 d_getnetprotos (d_getnetprotos.U):
525 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
526 which indicates to the C program that <netdb.h> supplies
527 prototypes for the various getnet*() functions.
528 See also netdbtype.U for probing for various netdb types.
530 d_getpbyname (d_getprotby.U):
531 This variable conditionally defines the HAS_GETPROTOBYNAME
532 symbol, which indicates to the C program that the
533 getprotobyname() routine is available to look up protocols
536 d_getpbynumber (d_getprotby.U):
537 This variable conditionally defines the HAS_GETPROTOBYNUMBER
538 symbol, which indicates to the C program that the
539 getprotobynumber() routine is available to look up protocols
542 d_getpent (d_getpent.U):
543 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
544 available to look up protocols in some data base or another.
546 d_getpgid (d_getpgid.U):
547 This variable conditionally defines the HAS_GETPGID symbol, which
548 indicates to the C program that the getpgid(pid) function
549 is available to get the process group id.
551 d_getpgrp2 (d_getpgrp2.U):
552 This variable conditionally defines the HAS_GETPGRP2 symbol, which
553 indicates to the C program that the getpgrp2() (as in DG/UX) routine
554 is available to get the current process group.
556 d_getpgrp (d_getpgrp.U):
557 This variable conditionally defines HAS_GETPGRP if getpgrp() is
558 available to get the current process group.
560 d_getppid (d_getppid.U):
561 This variable conditionally defines the HAS_GETPPID symbol, which
562 indicates to the C program that the getppid() routine is available
563 to get the parent process ID.
565 d_getprior (d_getprior.U):
566 This variable conditionally defines HAS_GETPRIORITY if getpriority()
567 is available to get a process's priority.
569 d_getprotoprotos (d_getprotoprotos.U):
570 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
571 which indicates to the C program that <netdb.h> supplies
572 prototypes for the various getproto*() functions.
573 See also netdbtype.U for probing for various netdb types.
575 d_getsbyname (d_getsrvby.U):
576 This variable conditionally defines the HAS_GETSERVBYNAME
577 symbol, which indicates to the C program that the
578 getservbyname() routine is available to look up services
581 d_getsbyport (d_getsrvby.U):
582 This variable conditionally defines the HAS_GETSERVBYPORT
583 symbol, which indicates to the C program that the
584 getservbyport() routine is available to look up services
587 d_getsent (d_getsent.U):
588 This variable conditionally defines HAS_GETSERVENT if getservent() is
589 available to look up network services in some data base or another.
591 d_getservprotos (d_getservprotos.U):
592 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
593 which indicates to the C program that <netdb.h> supplies
594 prototypes for the various getserv*() functions.
595 See also netdbtype.U for probing for various netdb types.
597 d_gettimeod (d_ftime.U):
598 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
599 indicates that the gettimeofday() system call exists (to obtain a
600 sub-second accuracy clock). You should probably include <sys/resource.h>.
602 d_gnulibc (d_gnulibc.U):
603 Defined if we're dealing with the GNU C Library.
606 This variable conditionally defines HAS_HTONL if htonl() and its
607 friends are available to do network order byte swapping.
609 d_index (d_strchr.U):
610 This variable conditionally defines HAS_INDEX if index() and
611 rindex() are available for string searching.
613 d_inetaton (d_inetaton.U):
614 This variable conditionally defines the HAS_INET_ATON symbol, which
615 indicates to the C program that the inet_aton() function is available
616 to parse IP address "dotted-quad" strings.
618 d_isascii (d_isascii.U):
619 This variable conditionally defines the HAS_ISASCII constant,
620 which indicates to the C program that isascii() is available.
622 d_killpg (d_killpg.U):
623 This variable conditionally defines the HAS_KILLPG symbol, which
624 indicates to the C program that the killpg() routine is available
625 to kill process groups.
627 d_lchown (d_lchown.U):
628 This variable conditionally defines the HAS_LCHOWN symbol, which
629 indicates to the C program that the lchown() routine is available
630 to operate on a symbolic link (instead of following the link).
633 This variable conditionally defines HAS_LINK if link() is
634 available to create hard links.
636 d_locconv (d_locconv.U):
637 This variable conditionally defines HAS_LOCALECONV if localeconv() is
638 available for numeric and monetary formatting conventions.
641 This variable conditionally defines HAS_LOCKF if lockf() is
642 available to do file locking.
644 d_longdbl (d_longdbl.U):
645 This variable conditionally defines HAS_LONG_DOUBLE if
646 the long double type is supported.
648 d_longlong (d_longlong.U):
649 This variable conditionally defines HAS_LONG_LONG if
650 the long long type is supported.
653 This variable conditionally defines HAS_LSTAT if lstat() is
654 available to do file stats on symbolic links.
657 This variable conditionally defines the HAS_MBLEN symbol, which
658 indicates to the C program that the mblen() routine is available
659 to find the number of bytes in a multibye character.
661 d_mbstowcs (d_mbstowcs.U):
662 This variable conditionally defines the HAS_MBSTOWCS symbol, which
663 indicates to the C program that the mbstowcs() routine is available
664 to convert a multibyte string into a wide character string.
666 d_mbtowc (d_mbtowc.U):
667 This variable conditionally defines the HAS_MBTOWC symbol, which
668 indicates to the C program that the mbtowc() routine is available
669 to convert multibyte to a wide character.
671 d_memcmp (d_memcmp.U):
672 This variable conditionally defines the HAS_MEMCMP symbol, which
673 indicates to the C program that the memcmp() routine is available
674 to compare blocks of memory.
676 d_memcpy (d_memcpy.U):
677 This variable conditionally defines the HAS_MEMCPY symbol, which
678 indicates to the C program that the memcpy() routine is available
679 to copy blocks of memory.
681 d_memmove (d_memmove.U):
682 This variable conditionally defines the HAS_MEMMOVE symbol, which
683 indicates to the C program that the memmove() routine is available
684 to copy potentatially overlapping blocks of memory.
686 d_memset (d_memset.U):
687 This variable conditionally defines the HAS_MEMSET symbol, which
688 indicates to the C program that the memset() routine is available
689 to set blocks of memory.
692 This variable conditionally defines the HAS_MKDIR symbol, which
693 indicates to the C program that the mkdir() routine is available
694 to create directories..
696 d_mkfifo (d_mkfifo.U):
697 This variable conditionally defines the HAS_MKFIFO symbol, which
698 indicates to the C program that the mkfifo() routine is available.
700 d_mktime (d_mktime.U):
701 This variable conditionally defines the HAS_MKTIME symbol, which
702 indicates to the C program that the mktime() routine is available.
705 This variable conditionally defines the HAS_MSG symbol, which
706 indicates that the entire msg*(2) library is present.
708 d_msgctl (d_msgctl.U):
709 This variable conditionally defines the HAS_MSGCTL symbol, which
710 indicates to the C program that the msgctl() routine is available.
712 d_msgget (d_msgget.U):
713 This variable conditionally defines the HAS_MSGGET symbol, which
714 indicates to the C program that the msgget() routine is available.
716 d_msgrcv (d_msgrcv.U):
717 This variable conditionally defines the HAS_MSGRCV symbol, which
718 indicates to the C program that the msgrcv() routine is available.
720 d_msgsnd (d_msgsnd.U):
721 This variable conditionally defines the HAS_MSGSND symbol, which
722 indicates to the C program that the msgsnd() routine is available.
724 d_mymalloc (mallocsrc.U):
725 This variable conditionally defines MYMALLOC in case other parts
726 of the source want to take special action if MYMALLOC is used.
727 This may include different sorts of profiling or error detection.
730 This variable conditionally defines the HAS_NICE symbol, which
731 indicates to the C program that the nice() routine is available.
733 d_oldpthreads (usethreads.U):
734 This variable conditionally defines the OLD_PTHREADS_API symbol,
735 and indicates that Perl should be built to use the old
736 draft POSIX threads API. This is only potneially meaningful if
739 d_oldsock (d_socket.U):
740 This variable conditionally defines the OLDSOCKET symbol, which
741 indicates that the BSD socket interface is based on 4.1c and not 4.2.
744 This variable conditionally defines the HAS_OPEN3 manifest constant,
745 which indicates to the C program that the 3 argument version of
746 the open(2) function is available.
748 d_pathconf (d_pathconf.U):
749 This variable conditionally defines the HAS_PATHCONF symbol, which
750 indicates to the C program that the pathconf() routine is available
751 to determine file-system related limits and options associated
752 with a given filename.
755 This variable conditionally defines the HAS_PAUSE symbol, which
756 indicates to the C program that the pause() routine is available
757 to suspend a process until a signal is received.
759 d_phostname (d_gethname.U):
760 This variable conditionally defines the PHOSTNAME symbol, which
761 contains the shell command which, when fed to popen(), may be
762 used to derive the host name.
765 This variable conditionally defines the HAS_PIPE symbol, which
766 indicates to the C program that the pipe() routine is available
767 to create an inter-process channel.
770 This variable conditionally defines the HAS_POLL symbol, which
771 indicates to the C program that the poll() routine is available
772 to poll active file descriptors.
774 d_portable (d_portable.U):
775 This variable conditionally defines the PORTABLE symbol, which
776 indicates to the C program that it should not assume that it is
777 running on the machine it was compiled on.
779 d_pthread_yield (d_pthread_y.U):
780 This variable conditionally defines the HAS_PTHREAD_YIELD
781 symbol if the pthread_yield routine is available to yield
782 the execution of the current thread.
784 d_pthreads_created_joinable (d_pthreadj.U):
785 This variable conditionally defines the PTHREADS_CREATED_JOINABLE
786 symbol if pthreads are created in the joinable (aka undetached)
790 This variable conditionally defines PWAGE, which indicates
791 that struct passwd contains pw_age.
793 d_pwchange (i_pwd.U):
794 This variable conditionally defines PWCHANGE, which indicates
795 that struct passwd contains pw_change.
798 This variable conditionally defines PWCLASS, which indicates
799 that struct passwd contains pw_class.
801 d_pwcomment (i_pwd.U):
802 This variable conditionally defines PWCOMMENT, which indicates
803 that struct passwd contains pw_comment.
805 d_pwexpire (i_pwd.U):
806 This variable conditionally defines PWEXPIRE, which indicates
807 that struct passwd contains pw_expire.
810 This variable conditionally defines PWGECOS, which indicates
811 that struct passwd contains pw_gecos.
814 This variable conditionally defines PWQUOTA, which indicates
815 that struct passwd contains pw_quota.
817 d_readdir (d_readdir.U):
818 This variable conditionally defines HAS_READDIR if readdir() is
819 available to read directory entries.
821 d_readlink (d_readlink.U):
822 This variable conditionally defines the HAS_READLINK symbol, which
823 indicates to the C program that the readlink() routine is available
824 to read the value of a symbolic link.
826 d_rename (d_rename.U):
827 This variable conditionally defines the HAS_RENAME symbol, which
828 indicates to the C program that the rename() routine is available
831 d_rewinddir (d_readdir.U):
832 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
836 This variable conditionally defines HAS_RMDIR if rmdir() is
837 available to remove directories.
839 d_safebcpy (d_safebcpy.U):
840 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
841 the bcopy() routine can do overlapping copies.
843 d_safemcpy (d_safemcpy.U):
844 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
845 the memcpy() routine can do overlapping copies.
847 d_sanemcmp (d_sanemcmp.U):
848 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
849 the memcpy() routine is available and can be used to compare relative
850 magnitudes of chars with their high bits set.
852 d_sched_yield (d_pthread_y.U):
853 This variable conditionally defines the HAS_SCHED_YIELD
854 symbol if the sched_yield routine is available to yield
855 the execution of the current thread.
857 d_seekdir (d_readdir.U):
858 This variable conditionally defines HAS_SEEKDIR if seekdir() is
861 d_select (d_select.U):
862 This variable conditionally defines HAS_SELECT if select() is
863 available to select active file descriptors. A <sys/time.h>
864 inclusion may be necessary for the timeout field.
867 This variable conditionally defines the HAS_SEM symbol, which
868 indicates that the entire sem*(2) library is present.
870 d_semctl (d_semctl.U):
871 This variable conditionally defines the HAS_SEMCTL symbol, which
872 indicates to the C program that the semctl() routine is available.
874 d_semctl_semid_ds (d_union_senum.U):
875 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
876 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
878 d_semctl_semun (d_union_senum.U):
879 This variable conditionally defines USE_SEMCTL_SEMUN, which
880 indicates that union semun is to be used for semctl IPC_STAT.
882 d_semget (d_semget.U):
883 This variable conditionally defines the HAS_SEMGET symbol, which
884 indicates to the C program that the semget() routine is available.
887 This variable conditionally defines the HAS_SEMOP symbol, which
888 indicates to the C program that the semop() routine is available.
890 d_setegid (d_setegid.U):
891 This variable conditionally defines the HAS_SETEGID symbol, which
892 indicates to the C program that the setegid() routine is available
893 to change the effective gid of the current program.
895 d_seteuid (d_seteuid.U):
896 This variable conditionally defines the HAS_SETEUID symbol, which
897 indicates to the C program that the seteuid() routine is available
898 to change the effective uid of the current program.
900 d_setgrps (d_setgrps.U):
901 This variable conditionally defines the HAS_SETGROUPS symbol, which
902 indicates to the C program that the setgroups() routine is available
903 to set the list of process groups.
905 d_sethent (d_sethent.U):
906 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
909 d_setlinebuf (d_setlnbuf.U):
910 This variable conditionally defines the HAS_SETLINEBUF symbol, which
911 indicates to the C program that the setlinebuf() routine is available
912 to change stderr or stdout from block-buffered or unbuffered to a
915 d_setlocale (d_setlocale.U):
916 This variable conditionally defines HAS_SETLOCALE if setlocale() is
917 available to handle locale-specific ctype implementations.
919 d_setnent (d_setnent.U):
920 This variable conditionally defines HAS_SETNETENT if setnetent() is
923 d_setpent (d_setpent.U):
924 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
927 d_setpgid (d_setpgid.U):
928 This variable conditionally defines the HAS_SETPGID symbol if the
929 setpgid(pid, gpid) function is available to set process group ID.
931 d_setpgrp2 (d_setpgrp2.U):
932 This variable conditionally defines the HAS_SETPGRP2 symbol, which
933 indicates to the C program that the setpgrp2() (as in DG/UX) routine
934 is available to set the current process group.
936 d_setpgrp (d_setpgrp.U):
937 This variable conditionally defines HAS_SETPGRP if setpgrp() is
938 available to set the current process group.
940 d_setprior (d_setprior.U):
941 This variable conditionally defines HAS_SETPRIORITY if setpriority()
942 is available to set a process's priority.
944 d_setregid (d_setregid.U):
945 This variable conditionally defines HAS_SETREGID if setregid() is
946 available to change the real and effective gid of the current
949 d_setresgid (d_setregid.U):
950 This variable conditionally defines HAS_SETRESGID if setresgid() is
951 available to change the real, effective and saved gid of the current
954 d_setresuid (d_setreuid.U):
955 This variable conditionally defines HAS_SETREUID if setresuid() is
956 available to change the real, effective and saved uid of the current
959 d_setreuid (d_setreuid.U):
960 This variable conditionally defines HAS_SETREUID if setreuid() is
961 available to change the real and effective uid of the current
964 d_setrgid (d_setrgid.U):
965 This variable conditionally defines the HAS_SETRGID symbol, which
966 indicates to the C program that the setrgid() routine is available
967 to change the real gid of the current program.
969 d_setruid (d_setruid.U):
970 This variable conditionally defines the HAS_SETRUID symbol, which
971 indicates to the C program that the setruid() routine is available
972 to change the real uid of the current program.
974 d_setsent (d_setsent.U):
975 This variable conditionally defines HAS_SETSERVENT if setservent() is
978 d_setsid (d_setsid.U):
979 This variable conditionally defines HAS_SETSID if setsid() is
980 available to set the process group ID.
982 d_setvbuf (d_setvbuf.U):
983 This variable conditionally defines the HAS_SETVBUF symbol, which
984 indicates to the C program that the setvbuf() routine is available
985 to change buffering on an open stdio stream.
988 This variable conditionally defines the USE_SFIO symbol,
989 and indicates whether sfio is available (and should be used).
992 This variable conditionally defines the HAS_SHM symbol, which
993 indicates that the entire shm*(2) library is present.
996 This variable conditionally defines the HAS_SHMAT symbol, which
997 indicates to the C program that the shmat() routine is available.
999 d_shmatprototype (d_shmat.U):
1000 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1001 symbol, which indicates that sys/shm.h has a prototype for
1004 d_shmctl (d_shmctl.U):
1005 This variable conditionally defines the HAS_SHMCTL symbol, which
1006 indicates to the C program that the shmctl() routine is available.
1008 d_shmdt (d_shmdt.U):
1009 This variable conditionally defines the HAS_SHMDT symbol, which
1010 indicates to the C program that the shmdt() routine is available.
1012 d_shmget (d_shmget.U):
1013 This variable conditionally defines the HAS_SHMGET symbol, which
1014 indicates to the C program that the shmget() routine is available.
1016 d_sigaction (d_sigaction.U):
1017 This variable conditionally defines the HAS_SIGACTION symbol, which
1018 indicates that the Vr4 sigaction() routine is available.
1020 d_sigsetjmp (d_sigsetjmp.U):
1021 This variable conditionally defines the HAS_SIGSETJMP symbol,
1022 which indicates that the sigsetjmp() routine is available to
1023 call setjmp() and optionally save the process's signal mask.
1025 d_socket (d_socket.U):
1026 This variable conditionally defines HAS_SOCKET, which indicates
1027 that the BSD socket interface is supported.
1029 d_sockpair (d_socket.U):
1030 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1031 indicates that the BSD socketpair() is supported.
1033 d_statblks (d_statblks.U):
1034 This variable conditionally defines USE_STAT_BLOCKS if this system
1035 has a stat structure declaring st_blksize and st_blocks.
1037 d_stdio_cnt_lval (d_stdstdio.U):
1038 This variable conditionally defines STDIO_CNT_LVALUE if the
1039 FILE_cnt macro can be used as an lvalue.
1041 d_stdio_ptr_lval (d_stdstdio.U):
1042 This variable conditionally defines STDIO_PTR_LVALUE if the
1043 FILE_ptr macro can be used as an lvalue.
1045 d_stdiobase (d_stdstdio.U):
1046 This variable conditionally defines USE_STDIO_BASE if this system
1047 has a FILE structure declaring a usable _base field (or equivalent)
1050 d_stdstdio (d_stdstdio.U):
1051 This variable conditionally defines USE_STDIO_PTR if this system
1052 has a FILE structure declaring usable _ptr and _cnt fields (or
1053 equivalent) in stdio.h.
1055 d_strchr (d_strchr.U):
1056 This variable conditionally defines HAS_STRCHR if strchr() and
1057 strrchr() are available for string searching.
1059 d_strcoll (d_strcoll.U):
1060 This variable conditionally defines HAS_STRCOLL if strcoll() is
1061 available to compare strings using collating information.
1063 d_strctcpy (d_strctcpy.U):
1064 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1065 indicates to the C program that this C compiler knows how to copy
1068 d_strerrm (d_strerror.U):
1069 This variable holds what Strerrr is defined as to translate an error
1070 code condition into an error message string. It could be 'strerror'
1071 or a more complex macro emulating strrror with sys_errlist[], or the
1072 "unknown" string when both strerror and sys_errlist are missing.
1074 d_strerror (d_strerror.U):
1075 This variable conditionally defines HAS_STRERROR if strerror() is
1076 available to translate error numbers to strings.
1078 d_strtod (d_strtod.U):
1079 This variable conditionally defines the HAS_STRTOD symbol, which
1080 indicates to the C program that the strtod() routine is available
1081 to provide better numeric string conversion than atof().
1083 d_strtol (d_strtol.U):
1084 This variable conditionally defines the HAS_STRTOL symbol, which
1085 indicates to the C program that the strtol() routine is available
1086 to provide better numeric string conversion than atoi() and friends.
1088 d_strtoul (d_strtoul.U):
1089 This variable conditionally defines the HAS_STRTOUL symbol, which
1090 indicates to the C program that the strtoul() routine is available
1091 to provide conversion of strings to unsigned long.
1093 d_strxfrm (d_strxfrm.U):
1094 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1095 available to transform strings.
1097 d_suidsafe (d_dosuid.U):
1098 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1099 if setuid scripts can be secure. This test looks in /dev/fd/.
1101 d_symlink (d_symlink.U):
1102 This variable conditionally defines the HAS_SYMLINK symbol, which
1103 indicates to the C program that the symlink() routine is available
1104 to create symbolic links.
1106 d_syscall (d_syscall.U):
1107 This variable conditionally defines HAS_SYSCALL if syscall() is
1108 available call arbitrary system calls.
1110 d_sysconf (d_sysconf.U):
1111 This variable conditionally defines the HAS_SYSCONF symbol, which
1112 indicates to the C program that the sysconf() routine is available
1113 to determine system related limits and options.
1115 d_sysernlst (d_strerror.U):
1116 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1117 is available to translate error numbers to the symbolic name.
1119 d_syserrlst (d_strerror.U):
1120 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1121 available to translate error numbers to strings.
1123 d_system (d_system.U):
1124 This variable conditionally defines HAS_SYSTEM if system() is
1125 available to issue a shell command.
1127 d_tcgetpgrp (d_tcgtpgrp.U):
1128 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1129 indicates to the C program that the tcgetpgrp() routine is available.
1130 to get foreground process group ID.
1132 d_tcsetpgrp (d_tcstpgrp.U):
1133 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1134 indicates to the C program that the tcsetpgrp() routine is available
1135 to set foreground process group ID.
1137 d_telldir (d_readdir.U):
1138 This variable conditionally defines HAS_TELLDIR if telldir() is
1142 This variable conditionally defines the HAS_TIME symbol, which indicates
1143 that the time() routine exists. The time() routine is normaly
1144 provided on UNIX systems.
1146 d_times (d_times.U):
1147 This variable conditionally defines the HAS_TIMES symbol, which indicates
1148 that the times() routine exists. The times() routine is normaly
1149 provided on UNIX systems. You may have to include <sys/times.h>.
1151 d_truncate (d_truncate.U):
1152 This variable conditionally defines HAS_TRUNCATE if truncate() is
1153 available to truncate files.
1155 d_tzname (d_tzname.U):
1156 This variable conditionally defines HAS_TZNAME if tzname[] is
1157 available to access timezone names.
1159 d_umask (d_umask.U):
1160 This variable conditionally defines the HAS_UMASK symbol, which
1161 indicates to the C program that the umask() routine is available.
1162 to set and get the value of the file creation mask.
1164 d_uname (d_gethname.U):
1165 This variable conditionally defines the HAS_UNAME symbol, which
1166 indicates to the C program that the uname() routine may be
1167 used to derive the host name.
1169 d_union_semun (d_union_senum.U):
1170 This variable conditionally defines HAS_UNION_SEMUN if the
1171 union semun is defined by including <sys/sem.h>.
1173 d_vfork (d_vfork.U):
1174 This variable conditionally defines the HAS_VFORK symbol, which
1175 indicates the vfork() routine is available.
1177 d_void_closedir (d_closedir.U):
1178 This variable conditionally defines VOID_CLOSEDIR if closedir()
1179 does not return a value.
1181 d_voidsig (d_voidsig.U):
1182 This variable conditionally defines VOIDSIG if this system
1183 declares "void (*signal(...))()" in signal.h. The old way was to
1184 declare it as "int (*signal(...))()".
1186 d_voidtty (i_sysioctl.U):
1187 This variable conditionally defines USE_IOCNOTTY to indicate that the
1188 ioctl() call with TIOCNOTTY should be used to void tty association.
1189 Otherwise (on USG probably), it is enough to close the standard file
1190 decriptors and do a setpgrp().
1192 d_volatile (d_volatile.U):
1193 This variable conditionally defines the HASVOLATILE symbol, which
1194 indicates to the C program that this C compiler knows about the
1195 volatile declaration.
1197 d_vprintf (d_vprintf.U):
1198 This variable conditionally defines the HAS_VPRINTF symbol, which
1199 indicates to the C program that the vprintf() routine is available
1200 to printf with a pointer to an argument list.
1202 d_wait4 (d_wait4.U):
1203 This variable conditionally defines the HAS_WAIT4 symbol, which
1204 indicates the wait4() routine is available.
1206 d_waitpid (d_waitpid.U):
1207 This variable conditionally defines HAS_WAITPID if waitpid() is
1208 available to wait for child process.
1210 d_wcstombs (d_wcstombs.U):
1211 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1212 indicates to the C program that the wcstombs() routine is available
1213 to convert wide character strings to multibyte strings.
1215 d_wctomb (d_wctomb.U):
1216 This variable conditionally defines the HAS_WCTOMB symbol, which
1217 indicates to the C program that the wctomb() routine is available
1218 to convert a wide character to a multibyte.
1221 This variable conditionally defines the symbol XENIX, which alerts
1222 the C program that it runs under Xenix.
1225 This variable is be used internally by Configure to determine the
1226 full pathname (if any) of the date program. After Configure runs,
1227 the value is reset to a plain "date" and is not useful.
1229 db_hashtype (i_db.U):
1230 This variable contains the type of the hash structure element
1231 in the <db.h> header file. In older versions of DB, it was
1232 int, while in newer ones it is u_int32_t.
1234 db_prefixtype (i_db.U):
1235 This variable contains the type of the prefix structure element
1236 in the <db.h> header file. In older versions of DB, it was
1237 int, while in newer ones it is size_t.
1239 direntrytype (i_dirent.U):
1240 This symbol is set to 'struct direct' or 'struct dirent' depending on
1241 whether dirent is available or not. You should use this pseudo type to
1242 portably declare your directory entries.
1245 This variable contains the extension that is to be used for the
1246 dynamically loaded modules that perl generaties.
1249 This variable contains the name of the dynamic loading file that
1250 will be used with the package.
1252 doublesize (doublesize.U):
1253 This variable contains the value of the DOUBLESIZE symbol, which
1254 indicates to the C program how many bytes there are in a double.
1256 dynamic_ext (Extensions.U):
1257 This variable holds a list of XS extension files we want to
1258 link dynamically into the package. It is used by Makefile.
1260 eagain (nblock_io.U):
1261 This variable bears the symbolic errno code set by read() when no
1262 data is present on the file and non-blocking I/O was enabled (otherwise,
1263 read() blocks naturally).
1266 This variable is be used internally by Configure to determine the
1267 full pathname (if any) of the echo program. After Configure runs,
1268 the value is reset to a plain "echo" and is not useful.
1271 This variable is be used internally by Configure to determine the
1272 full pathname (if any) of the egrep program. After Configure runs,
1273 the value is reset to a plain "egrep" and is not useful.
1276 This variable is defined but not used by Configure.
1277 The value is a plain '' and is not useful.
1280 When running under Eunice this variable contains a command which will
1281 convert a shell script to the proper form of text file for it to be
1282 executable by the shell. On other systems it is a no-op.
1285 This is an old synonym for _exe.
1288 This variable is be used internally by Configure to determine the
1289 full pathname (if any) of the expr program. After Configure runs,
1290 the value is reset to a plain "expr" and is not useful.
1292 extensions (Extensions.U):
1293 This variable holds a list of all extension files (both XS and
1294 non-xs linked into the package. It is propagated to Config.pm
1295 and is typically used to test whether a particular extesion
1299 This variable is be used internally by Configure to determine the
1300 full pathname (if any) of the find program. After Configure runs,
1301 the value is reset to a plain "find" and is not useful.
1303 firstmakefile (Unix.U):
1304 This variable defines the first file searched by make. On unix,
1305 it is makefile (then Makefile). On case-insensitive systems,
1306 it might be something else. This is only used to deal with
1307 convoluted make depend tricks.
1310 This variable is defined but not used by Configure.
1311 The value is a plain '' and is not useful.
1313 fpostype (fpostype.U):
1314 This variable defines Fpos_t to be something like fpost_t, long,
1315 uint, or whatever type is used to declare file positions in libc.
1317 freetype (mallocsrc.U):
1318 This variable contains the return type of free(). It is usually
1319 void, but occasionally int.
1322 This variable contains the full pathname to 'csh', whether or
1323 not the user has specified 'portability'. This is only used
1324 in the compiled C program, and we assume that all systems which
1325 can share this executable will have the same full pathname to
1328 full_sed (Loc_sed.U):
1329 This variable contains the full pathname to 'sed', whether or
1330 not the user has specified 'portability'. This is only used
1331 in the compiled C program, and we assume that all systems which
1332 can share this executable will have the same full pathname to
1336 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1337 indicate whether the compiler is version 1 or 2. This is used in
1338 setting some of the default cflags. It is set to '' if not gcc.
1340 gidtype (gidtype.U):
1341 This variable defines Gid_t to be something like gid_t, int,
1342 ushort, or whatever type is used to declare the return type
1343 of getgid(). Typically, it is the type of group ids in the kernel.
1346 This variable is be used internally by Configure to determine the
1347 full pathname (if any) of the grep program. After Configure runs,
1348 the value is reset to a plain "grep" and is not useful.
1351 This variable contains a command that produces the text of the
1352 /etc/group file. This is normally "cat /etc/group", but can be
1353 "ypcat group" when NIS is used.
1355 groupstype (groupstype.U):
1356 This variable defines Groups_t to be something like gid_t, int,
1357 ushort, or whatever type is used for the second argument to
1358 getgroups() and setgroups(). Usually, this is the same as
1359 gidtype (gid_t), but sometimes it isn't.
1362 This variable is be used internally by Configure to determine the
1363 full pathname (if any) of the gzip program. After Configure runs,
1364 the value is reset to a plain "gzip" and is not useful.
1366 h_fcntl (h_fcntl.U):
1367 This is variable gets set in various places to tell i_fcntl that
1368 <fcntl.h> should be included.
1370 h_sysfile (h_sysfile.U):
1371 This is variable gets set in various places to tell i_sys_file that
1372 <sys/file.h> should be included.
1375 Gives the type of hints used for previous answers. May be one of
1376 "default", "recommended" or "previous".
1379 This variable contains a command that produces the text of the
1380 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1381 "ypcat hosts" when NIS is used.
1384 This variable contains a flag which will tell the C compiler and loader
1385 to produce a program running with a huge memory model. If the
1386 huge model is not supported, contains the flag to produce large
1387 model programs. It is up to the Makefile to use this.
1389 i_bsdioctl (i_sysioctl.U):
1390 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1391 indicates to the C program that <sys/bsdioctl.h> exists and should
1395 This variable conditionally defines the I_DB symbol, and indicates
1396 whether a C program may include Berkeley's DB include file <db.h>.
1399 This variable conditionally defines the I_DBM symbol, which
1400 indicates to the C program that <dbm.h> exists and should
1403 i_dirent (i_dirent.U):
1404 This variable conditionally defines I_DIRENT, which indicates
1405 to the C program that it should include <dirent.h>.
1408 This variable conditionally defines the I_DLD symbol, which
1409 indicates to the C program that <dld.h> (GNU dynamic loading)
1410 exists and should be included.
1412 i_dlfcn (i_dlfcn.U):
1413 This variable conditionally defines the I_DLFCN symbol, which
1414 indicates to the C program that <dlfcn.h> exists and should
1417 i_fcntl (i_fcntl.U):
1418 This variable controls the value of I_FCNTL (which tells
1419 the C program to include <fcntl.h>).
1421 i_float (i_float.U):
1422 This variable conditionally defines the I_FLOAT symbol, and indicates
1423 whether a C program may include <float.h> to get symbols like DBL_MAX
1424 or DBL_MIN, i.e. machine dependent floating point values.
1427 This variable conditionally defines the I_GDBM symbol, which
1428 indicates to the C program that <gdbm.h> exists and should
1432 This variable conditionally defines the I_GRP symbol, and indicates
1433 whether a C program should include <grp.h>.
1435 i_limits (i_limits.U):
1436 This variable conditionally defines the I_LIMITS symbol, and indicates
1437 whether a C program may include <limits.h> to get symbols like WORD_BIT
1440 i_locale (i_locale.U):
1441 This variable conditionally defines the I_LOCALE symbol,
1442 and indicates whether a C program should include <locale.h>.
1444 i_malloc (i_malloc.U):
1445 This variable conditionally defines the I_MALLOC symbol, and indicates
1446 whether a C program should include <malloc.h>.
1449 This variable conditionally defines the I_MATH symbol, and indicates
1450 whether a C program may include <math.h>.
1452 i_memory (i_memory.U):
1453 This variable conditionally defines the I_MEMORY symbol, and indicates
1454 whether a C program should include <memory.h>.
1457 This variable conditionally defines the I_NDBM symbol, which
1458 indicates to the C program that <ndbm.h> exists and should
1461 i_netdb (i_netdb.U):
1462 This variable conditionally defines the I_NETDB symbol, and indicates
1463 whether a C program should include <netdb.h>.
1465 i_neterrno (i_neterrno.U):
1466 This variable conditionally defines the I_NET_ERRNO symbol, which
1467 indicates to the C program that <net/errno.h> exists and should
1471 This variable conditionally defines I_NETINET_IN, which indicates
1472 to the C program that it should include <netinet/in.h>. Otherwise,
1473 you may try <sys/in.h>.
1476 This variable conditionally defines I_PWD, which indicates
1477 to the C program that it should include <pwd.h>.
1479 i_rpcsvcdbm (i_dbm.U):
1480 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1481 indicates to the C program that <rpcsvc/dbm.h> exists and should
1482 be included. Some System V systems might need this instead of <dbm.h>.
1485 This variable conditionally defines the I_SFIO symbol,
1486 and indicates whether a C program should include <sfio.h>.
1488 i_sgtty (i_termio.U):
1489 This variable conditionally defines the I_SGTTY symbol, which
1490 indicates to the C program that it should include <sgtty.h> rather
1493 i_stdarg (i_varhdr.U):
1494 This variable conditionally defines the I_STDARG symbol, which
1495 indicates to the C program that <stdarg.h> exists and should
1498 i_stddef (i_stddef.U):
1499 This variable conditionally defines the I_STDDEF symbol, which
1500 indicates to the C program that <stddef.h> exists and should
1503 i_stdlib (i_stdlib.U):
1504 This variable conditionally defines the I_STDLIB symbol, which
1505 indicates to the C program that <stdlib.h> exists and should
1508 i_string (i_string.U):
1509 This variable conditionally defines the I_STRING symbol, which
1510 indicates that <string.h> should be included rather than <strings.h>.
1512 i_sysdir (i_sysdir.U):
1513 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1514 whether a C program should include <sys/dir.h>.
1516 i_sysfile (i_sysfile.U):
1517 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1518 whether a C program should include <sys/file.h> to get R_OK and friends.
1520 i_sysfilio (i_sysioctl.U):
1521 This variable conditionally defines the I_SYS_FILIO symbol, which
1522 indicates to the C program that <sys/filio.h> exists and should
1523 be included in preference to <sys/ioctl.h>.
1526 This variable conditionally defines I_SYS_IN, which indicates
1527 to the C program that it should include <sys/in.h> instead of
1530 i_sysioctl (i_sysioctl.U):
1531 This variable conditionally defines the I_SYS_IOCTL symbol, which
1532 indicates to the C program that <sys/ioctl.h> exists and should
1535 i_sysndir (i_sysndir.U):
1536 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1537 whether a C program should include <sys/ndir.h>.
1539 i_sysparam (i_sysparam.U):
1540 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1541 whether a C program should include <sys/param.h>.
1543 i_sysresrc (i_sysresrc.U):
1544 This variable conditionally defines the I_SYS_RESOURCE symbol,
1545 and indicates whether a C program should include <sys/resource.h>.
1547 i_sysselct (i_sysselct.U):
1548 This variable conditionally defines I_SYS_SELECT, which indicates
1549 to the C program that it should include <sys/select.h> in order to
1550 get the definition of struct timeval.
1552 i_syssockio (i_sysioctl.U):
1553 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1554 C program that socket ioctl codes may be found in <sys/sockio.h>
1555 instead of <sys/ioctl.h>.
1557 i_sysstat (i_sysstat.U):
1558 This variable conditionally defines the I_SYS_STAT symbol,
1559 and indicates whether a C program should include <sys/stat.h>.
1561 i_systime (i_time.U):
1562 This variable conditionally defines I_SYS_TIME, which indicates
1563 to the C program that it should include <sys/time.h>.
1565 i_systimek (i_time.U):
1566 This variable conditionally defines I_SYS_TIME_KERNEL, which
1567 indicates to the C program that it should include <sys/time.h>
1568 with KERNEL defined.
1570 i_systimes (i_systimes.U):
1571 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1572 whether a C program should include <sys/times.h>.
1574 i_systypes (i_systypes.U):
1575 This variable conditionally defines the I_SYS_TYPES symbol,
1576 and indicates whether a C program should include <sys/types.h>.
1578 i_sysun (i_sysun.U):
1579 This variable conditionally defines I_SYS_UN, which indicates
1580 to the C program that it should include <sys/un.h> to get UNIX
1581 domain socket definitions.
1583 i_syswait (i_syswait.U):
1584 This variable conditionally defines I_SYS_WAIT, which indicates
1585 to the C program that it should include <sys/wait.h>.
1587 i_termio (i_termio.U):
1588 This variable conditionally defines the I_TERMIO symbol, which
1589 indicates to the C program that it should include <termio.h> rather
1592 i_termios (i_termio.U):
1593 This variable conditionally defines the I_TERMIOS symbol, which
1594 indicates to the C program that the POSIX <termios.h> file is
1598 This variable conditionally defines I_TIME, which indicates
1599 to the C program that it should include <time.h>.
1601 i_unistd (i_unistd.U):
1602 This variable conditionally defines the I_UNISTD symbol, and indicates
1603 whether a C program should include <unistd.h>.
1605 i_utime (i_utime.U):
1606 This variable conditionally defines the I_UTIME symbol, and indicates
1607 whether a C program should include <utime.h>.
1609 i_values (i_values.U):
1610 This variable conditionally defines the I_VALUES symbol, and indicates
1611 whether a C program may include <values.h> to get symbols like MAXLONG
1614 i_varargs (i_varhdr.U):
1615 This variable conditionally defines I_VARARGS, which indicates
1616 to the C program that it should include <varargs.h>.
1618 i_varhdr (i_varhdr.U):
1619 Contains the name of the header to be included to get va_dcl definition.
1620 Typically one of varargs.h or stdarg.h.
1622 i_vfork (i_vfork.U):
1623 This variable conditionally defines the I_VFORK symbol, and indicates
1624 whether a C program should include vfork.h.
1627 This variable must preceed the normal include path to get hte
1628 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
1629 Value can be "" or "/bsd43" on mips.
1632 This variable is defined but not used by Configure.
1633 The value is a plain '' and is not useful.
1635 installarchlib (archlib.U):
1636 This variable is really the same as archlibexp but may differ on
1637 those systems using AFS. For extra portability, only this variable
1638 should be used in makefiles.
1641 This variable is the same as binexp unless AFS is running in which case
1642 the user is explicitely prompted for it. This variable should always
1643 be used in your makefiles for maximum portability.
1645 installman1dir (man1dir.U):
1646 This variable is really the same as man1direxp, unless you are using
1647 AFS in which case it points to the read/write location whereas
1648 man1direxp only points to the read-only access location. For extra
1649 portability, you should only use this variable within your makefiles.
1651 installman3dir (man3dir.U):
1652 This variable is really the same as man3direxp, unless you are using
1653 AFS in which case it points to the read/write location whereas
1654 man3direxp only points to the read-only access location. For extra
1655 portability, you should only use this variable within your makefiles.
1657 installprivlib (privlib.U):
1658 This variable is really the same as privlibexp but may differ on
1659 those systems using AFS. For extra portability, only this variable
1660 should be used in makefiles.
1662 installscript (scriptdir.U):
1663 This variable is usually the same as scriptdirexp, unless you are on
1664 a system running AFS, in which case they may differ slightly. You
1665 should always use this variable within your makefiles for portability.
1667 installsitearch (sitearch.U):
1668 This variable is really the same as sitearchexp but may differ on
1669 those systems using AFS. For extra portability, only this variable
1670 should be used in makefiles.
1672 installsitelib (sitelib.U):
1673 This variable is really the same as sitelibexp but may differ on
1674 those systems using AFS. For extra portability, only this variable
1675 should be used in makefiles.
1677 intsize (intsize.U):
1678 This variable contains the value of the INTSIZE symbol, which
1679 indicates to the C program how many bytes there are in an int.
1681 known_extensions (Extensions.U):
1682 This variable holds a list of all XS extensions included in
1686 This variable is defined but not used by Configure.
1687 The value is a plain '' and is not useful.
1690 This variable contains a flag which will tell the C compiler and loader
1691 to produce a program running with a large memory model. It is up to
1692 the Makefile to use this.
1695 This variable indicates the program to be used to link
1696 libraries for dynamic loading. On some systems, it is 'ld'.
1697 On ELF systems, it should be $cc. Mostly, we'll try to respect
1698 the hint file setting.
1700 lddlflags (dlsrc.U):
1701 This variable contains any special flags that might need to be
1702 passed to $ld to create a shared library suitable for dynamic
1703 loading. It is up to the makefile to use it. For hpux, it
1704 should be '-b'. For sunos 4.1, it is empty.
1706 ldflags (ccflags.U):
1707 This variable contains any additional C loader flags desired by
1708 the user. It is up to the Makefile to use this.
1711 This variable is be used internally by Configure to determine the
1712 full pathname (if any) of the less program. After Configure runs,
1713 the value is reset to a plain "less" and is not useful.
1716 This is an old synonym for _a.
1719 This variable contains the location of the C library.
1721 libperl (libperl.U):
1722 The perl executable is obtained by linking perlmain.c with
1723 libperl, any static extensions (usually just DynaLoader),
1724 and any other libraries needed on this system. libperl
1725 is usually libperl.a, but can also be libperl.so.xxx if
1726 the user wishes to build a perl executable with a shared
1730 This variable holds the general path used to find libraries. It is
1731 intended to be used by other units.
1734 This variable holds the additional libraries we want to use.
1735 It is up to the Makefile to deal with it.
1737 libswanted (Myinit.U):
1738 This variable holds a list of all the libraries we want to
1739 search. The order is chosen to pick up the c library
1740 ahead of ucb or bsd libraries for SVR4.
1743 This variable is be used internally by Configure to determine the
1744 full pathname (if any) of the line program. After Configure runs,
1745 the value is reset to a plain "line" and is not useful.
1748 This variable is defined but not used by Configure.
1749 The value is a plain '' and is not useful.
1751 lkflags (ccflags.U):
1752 This variable contains any additional C partial linker flags desired by
1753 the user. It is up to the Makefile to use this.
1756 This variable is be used internally by Configure to determine the
1757 full pathname (if any) of the ln program. After Configure runs,
1758 the value is reset to a plain "ln" and is not useful.
1761 This variable holds the name of the command to make
1762 symbolic links (if they are supported). It can be used
1763 in the Makefile. It is either 'ln -s' or 'ln'
1765 locincpth (ccflags.U):
1766 This variable contains a list of additional directories to be
1767 searched by the compiler. The appropriate '-I' directives will
1768 be added to ccflags. This is intended to simplify setting
1769 local directories from the Configure command line.
1770 It's not much, but it parallels the loclibpth stuff in libpth.U.
1772 loclibpth (libpth.U):
1773 This variable holds the paths used to find local libraries. It is
1774 prepended to libpth, and is intended to be easily set from the
1777 longdblsize (d_longdbl.U):
1778 This variable contains the value of the LONG_DOUBLESIZE symbol, which
1779 indicates to the C program how many bytes there are in a long double,
1780 if this system supports long doubles.
1782 longlongsize (d_longlong.U):
1783 This variable contains the value of the LONGLONGSIZE symbol, which
1784 indicates to the C program how many bytes there are in a long long,
1785 if this system supports long long.
1787 longsize (intsize.U):
1788 This variable contains the value of the LONGSIZE symbol, which
1789 indicates to the C program how many bytes there are in a long.
1792 This variable is defined but not used by Configure.
1793 The value is a plain '' and is not useful.
1796 This variable is defined but not used by Configure.
1797 The value is a plain '' and is not useful.
1800 This variable is be used internally by Configure to determine the
1801 full pathname (if any) of the ls program. After Configure runs,
1802 the value is reset to a plain "ls" and is not useful.
1804 lseektype (lseektype.U):
1805 This variable defines lseektype to be something like off_t, long,
1806 or whatever type is used to declare lseek offset's type in the
1807 kernel (which also appears to be lseek's return type).
1810 This variable is defined but not used by Configure.
1811 The value is a plain '' and is not useful.
1814 This variable is defined but not used by Configure.
1815 The value is a plain '' and is not useful.
1818 This variable is be used internally by Configure to determine the
1819 full pathname (if any) of the make program. After Configure runs,
1820 the value is reset to a plain "make" and is not useful.
1822 make_set_make (make.U):
1823 Some versions of 'make' set the variable MAKE. Others do not.
1824 This variable contains the string to be included in Makefile.SH
1825 so that MAKE is set if needed, and not if not needed.
1826 Possible values are:
1827 make_set_make='#' # If your make program handles this for you,
1828 make_set_make="MAKE=$make" # if it doesn't.
1829 I used a comment character so that we can distinguish a
1830 'set' value (from a previous config.sh or Configure '-D' option)
1831 from an uncomputed value.
1833 mallocobj (mallocsrc.U):
1834 This variable contains the name of the malloc.o that this package
1835 generates, if that malloc.o is preferred over the system malloc.
1836 Otherwise the value is null. This variable is intended for generating
1837 Makefiles. See mallocsrc.
1839 mallocsrc (mallocsrc.U):
1840 This variable contains the name of the malloc.c that comes with
1841 the package, if that malloc.c is preferred over the system malloc.
1842 Otherwise the value is null. This variable is intended for generating
1845 malloctype (mallocsrc.U):
1846 This variable contains the kind of ptr returned by malloc and realloc.
1848 man1dir (man1dir.U):
1849 This variable contains the name of the directory in which manual
1850 source pages are to be put. It is the responsibility of the
1851 Makefile.SH to get the value of this into the proper command.
1852 You must be prepared to do the ~name expansion yourself.
1854 man1direxp (man1dir.U):
1855 This variable is the same as the man1dir variable, but is filename
1856 expanded at configuration time, for convenient use in makefiles.
1858 man1ext (man1dir.U):
1859 This variable contains the extension that the manual page should
1860 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
1863 man3dir (man3dir.U):
1864 This variable contains the name of the directory in which manual
1865 source pages are to be put. It is the responsibility of the
1866 Makefile.SH to get the value of this into the proper command.
1867 You must be prepared to do the ~name expansion yourself.
1869 man3direxp (man3dir.U):
1870 This variable is the same as the man3dir variable, but is filename
1871 expanded at configuration time, for convenient use in makefiles.
1873 man3ext (man3dir.U):
1874 This variable contains the extension that the manual page should
1875 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
1879 This variable contains a flag which will tell the C compiler and loader
1880 to produce a program running with a medium memory model. If the
1881 medium model is not supported, contains the flag to produce large
1882 model programs. It is up to the Makefile to use this.
1884 mips_type (usrinc.U):
1885 This variable holds the environment type for the mips system.
1886 Possible values are "BSD 4.3" and "System V".
1889 This variable is be used internally by Configure to determine the
1890 full pathname (if any) of the mkdir program. After Configure runs,
1891 the value is reset to a plain "mkdir" and is not useful.
1894 This variable contains the list of memory models supported by this
1895 system. Possible component values are none, split, unsplit, small,
1896 medium, large, and huge. The component values are space separated.
1898 modetype (modetype.U):
1899 This variable defines modetype to be something like mode_t,
1900 int, unsigned short, or whatever type is used to declare file
1901 modes for system calls.
1904 This variable is be used internally by Configure to determine the
1905 full pathname (if any) of the more program. After Configure runs,
1906 the value is reset to a plain "more" and is not useful.
1909 This variable is defined but not used by Configure.
1910 The value is a plain '' and is not useful.
1912 myarchname (archname.U):
1913 This variable holds the architecture name computed by Configure in
1914 a previous run. It is not intended to be perused by any user and
1915 should never be set in a hint file.
1917 mydomain (myhostname.U):
1918 This variable contains the eventual value of the MYDOMAIN symbol,
1919 which is the domain of the host the program is going to run on.
1920 The domain must be appended to myhostname to form a complete host name.
1921 The dot comes with mydomain, and need not be supplied by the program.
1923 myhostname (myhostname.U):
1924 This variable contains the eventual value of the MYHOSTNAME symbol,
1925 which is the name of the host the program is going to run on.
1926 The domain is not kept with hostname, but must be gotten from mydomain.
1927 The dot comes with mydomain, and need not be supplied by the program.
1929 myuname (Oldconfig.U):
1930 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
1931 pseudo variables assignments in the output are stripped, thank you. The
1932 whole thing is then lower-cased.
1935 This variable contains the '-n' flag if that is what causes the echo
1936 command to suppress newline. Otherwise it is null. Correct usage is
1937 $echo $n "prompt for a question: $c".
1939 netdb_hlen_type (netdbtype.U):
1940 This variable holds the type used for the 2nd argument to
1941 gethostbyaddr(). Usually, this is int or size_t or unsigned.
1942 This is only useful if you have gethostbyaddr(), naturally.
1944 netdb_host_type (netdbtype.U):
1945 This variable holds the type used for the 1st argument to
1946 gethostbyaddr(). Usually, this is char * or void *, possibly
1947 with or without a const prefix.
1948 This is only useful if you have gethostbyaddr(), naturally.
1950 netdb_name_type (netdbtype.U):
1951 This variable holds the type used for the argument to
1952 gethostbyname(). Usually, this is char * or const char *.
1953 This is only useful if you have gethostbyname(), naturally.
1955 netdb_net_type (netdbtype.U):
1956 This variable holds the type used for the 1st argument to
1957 getnetbyaddr(). Usually, this is int or long.
1958 This is only useful if you have getnetbyaddr(), naturally.
1961 This variable is be used internally by Configure to determine the
1962 full pathname (if any) of the nm program. After Configure runs,
1963 the value is reset to a plain "nm" and is not useful.
1966 This variable holds the options that may be necessary for nm.
1968 nm_so_opt (usenm.U):
1969 This variable holds the options that may be necessary for nm
1970 to work on a shared library but that can not be used on an
1971 archive library. Currently, this is only used by Linux, where
1972 nm --dynamic is *required* to get symbols from an ELF library which
1973 has been stripped, but nm --dynamic is *fatal* on an archive library.
1974 Maybe Linux should just always set usenm=false.
1976 nonxs_ext (Extensions.U):
1977 This variable holds a list of all non-xs extensions included
1978 in the package. All of them will be built.
1981 This variable is be used internally by Configure to determine the
1982 full pathname (if any) of the nroff program. After Configure runs,
1983 the value is reset to a plain "nroff" and is not useful.
1985 o_nonblock (nblock_io.U):
1986 This variable bears the symbol value to be used during open() or fcntl()
1987 to turn on non-blocking I/O for a file descriptor. If you wish to switch
1988 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
1989 but that is only supported by some devices.
1992 This is an old synonym for _o.
1994 optimize (ccflags.U):
1995 This variable contains any optimizer/debugger flag that should be used.
1996 It is up to the Makefile to use it.
1998 orderlib (orderlib.U):
1999 This variable is "true" if the components of libraries must be ordered
2000 (with `lorder $* | tsort`) before placing them in an archive. Set to
2001 "false" if ranlib or ar can generate random libraries.
2003 osname (Oldconfig.U):
2004 This variable contains the operating system name (e.g. sunos,
2005 solaris, hpux, etc.). It can be useful later on for setting
2006 defaults. Any spaces are replaced with underscores. It is set
2007 to a null string if we can't figure it out.
2009 osvers (Oldconfig.U):
2010 This variable contains the operating system version (e.g.
2011 4.1.3, 5.2, etc.). It is primarily used for helping select
2012 an appropriate hints file, but might be useful elsewhere for
2013 setting defaults. It is set to '' if we can't figure it out.
2014 We try to be flexible about how much of the version number
2015 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2016 same for this package, hints files might just be os_4.0 or
2017 os_4.1, etc., not keeping separate files for each little release.
2019 package (package.U):
2020 This variable contains the name of the package being constructed.
2021 It is primarily intended for the use of later Configure units.
2024 This variable contains the name of the preferred pager on the system.
2025 Usual values are (the full pathnames of) more, less, pg, or cat.
2028 This variable contains a command that produces the text of the
2029 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2030 "ypcat passwd" when NIS is used.
2032 patchlevel (patchlevel.U):
2033 The patchlevel level of this package.
2034 The value of patchlevel comes from the patchlevel.h file.
2037 This is an old synonym for p_ in Head.U, the character
2038 used to separate elements in the command shell search PATH.
2041 This variable is be used internally by Configure to determine the
2042 full pathname (if any) of the perl program. After Configure runs,
2043 the value is reset to a plain "perl" and is not useful.
2045 perladmin (perladmin.U):
2046 Electronic mail address of the perl5 administrator.
2048 perlpath (perlpath.U):
2049 This variable contains the eventual value of the PERLPATH symbol,
2050 which contains the name of the perl interpreter to be used in
2051 shell scripts and in the "eval 'exec'" idiom.
2054 This variable is be used internally by Configure to determine the
2055 full pathname (if any) of the pg program. After Configure runs,
2056 the value is reset to a plain "pg" and is not useful.
2058 phostname (myhostname.U):
2059 This variable contains the eventual value of the PHOSTNAME symbol,
2060 which is a command that can be fed to popen() to get the host name.
2061 The program should probably not presume that the domain is or isn't
2064 pidtype (pidtype.U):
2065 This variable defines PIDTYPE to be something like pid_t, int,
2066 ushort, or whatever type is used to declare process ids in the kernel.
2069 Holds the private path used by Configure to find out the libraries.
2070 Its value is prepend to libpth. This variable takes care of special
2071 machines, like the mips. Usually, it should be empty.
2074 This variable is defined but not used by Configure.
2075 The value is a plain '' and is not useful.
2078 This variable is defined but not used by Configure.
2079 The value is a plain '' and is not useful.
2082 This variable holds the name of the directory below which the
2083 user will install the package. Usually, this is /usr/local, and
2084 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2085 man pages in /usr/local/man, etc. It is only used to set defaults
2086 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2088 prefixexp (prefix.U):
2089 This variable holds the full absolute path of the directory below
2090 which the user will install the package. Derived from prefix.
2092 privlib (privlib.U):
2093 This variable contains the eventual value of the PRIVLIB symbol,
2094 which is the name of the private library for this package. It may
2095 have a ~ on the front. It is up to the makefile to eventually create
2096 this directory while performing installation (with ~ substitution).
2098 privlibexp (privlib.U):
2099 This variable is the ~name expanded version of privlib, so that you
2100 may use it directly in Makefiles or shell scripts.
2102 prototype (prototype.U):
2103 This variable holds the eventual value of CAN_PROTOTYPE, which
2104 indicates the C compiler can handle funciton prototypes.
2106 ptrsize (ptrsize.U):
2107 This variable contains the value of the PTRSIZE symbol, which
2108 indicates to the C program how many bytes there are in a pointer.
2110 randbits (randbits.U):
2111 This variable contains the eventual value of the RANDBITS symbol,
2112 which indicates to the C program how many bits of random number
2113 the rand() function produces.
2115 ranlib (orderlib.U):
2116 This variable is set to the pathname of the ranlib program, if it is
2117 needed to generate random libraries. Set to ":" if ar can generate
2118 random libraries or if random libraries are not supported
2120 rd_nodata (nblock_io.U):
2121 This variable holds the return code from read() when no data is
2122 present. It should be -1, but some systems return 0 when O_NDELAY is
2123 used, which is a shame because you cannot make the difference between
2124 no data and an EOF.. Sigh!
2127 This variable is be used internally by Configure to determine the
2128 full pathname (if any) of the rm program. After Configure runs,
2129 the value is reset to a plain "rm" and is not useful.
2132 This variable is defined but not used by Configure.
2133 The value is a plain '' and is not useful.
2136 This variable contains 'true' or 'false' depending whether the
2137 nm extraction should be performed or not, according to the value
2138 of usenm and the flags on the Configure command line.
2140 scriptdir (scriptdir.U):
2141 This variable holds the name of the directory in which the user wants
2142 to put publicly scripts for the package in question. It is either
2143 the same directory as for binaries, or a special one that can be
2144 mounted across different architectures, like /usr/share. Programs
2145 must be prepared to deal with ~name expansion.
2147 scriptdirexp (scriptdir.U):
2148 This variable is the same as scriptdir, but is filename expanded
2149 at configuration time, for programs not wanting to bother with it.
2152 This variable is be used internally by Configure to determine the
2153 full pathname (if any) of the sed program. After Configure runs,
2154 the value is reset to a plain "sed" and is not useful.
2156 selecttype (selecttype.U):
2157 This variable holds the type used for the 2nd, 3rd, and 4th
2158 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2159 is defined, and 'int *' otherwise. This is only useful if you
2160 have select(), naturally.
2163 This variable is be used internally by Configure to determine the
2164 full pathname (if any) of the sendmail program. After Configure runs,
2165 the value is reset to a plain "sendmail" and is not useful.
2168 This variable contains the full pathname of the shell used
2169 on this system to execute Bourne shell scripts. Usually, this will be
2170 /bin/sh, though it's possible that some systems will have /bin/ksh,
2171 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2173 This unit comes before Options.U, so you can't set sh with a '-D'
2174 option, though you can override this (and startsh)
2175 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2178 This variable is defined but not used by Configure.
2179 The value is a plain '' and is not useful.
2181 sharpbang (spitshell.U):
2182 This variable contains the string #! if this system supports that
2185 shmattype (d_shmat.U):
2186 This symbol contains the type of pointer returned by shmat().
2187 It can be 'void *' or 'char *'.
2189 shortsize (intsize.U):
2190 This variable contains the value of the SHORTSIZE symbol which
2191 indicates to the C program how many bytes there are in a short.
2193 shrpenv (libperl.U):
2194 If the user builds a shared libperl.so, then we need to tell the
2195 'perl' executable where it will be able to find the installed libperl.so.
2196 One way to do this on some systems is to set the environment variable
2197 LD_RUN_PATH to the directory that will be the final location of the
2198 shared libperl.so. The makefile can use this with something like
2199 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2201 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2204 See the main perl Makefile.SH for actual working usage.
2205 Alternatively, we might be able to use a command line option such
2206 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2207 $archlibexp/CORE (Linux).
2209 shsharp (spitshell.U):
2210 This variable tells further Configure units whether your sh can
2213 sig_name (sig_name.U):
2214 This variable holds the signal names, space separated. The leading
2215 SIG in signal name is removed. A ZERO is prepended to the
2216 list. This is currently not used.
2218 sig_name_init (sig_name.U):
2219 This variable holds the signal names, enclosed in double quotes and
2220 separated by commas, suitable for use in the SIG_NAME definition
2221 below. A "ZERO" is prepended to the list, and the list is
2222 terminated with a plain 0. The leading SIG in signal names
2223 is removed. See sig_num.
2225 sig_num (sig_name.U):
2226 This variable holds the signal numbers, comma separated. A 0 is
2227 prepended to the list (corresponding to the fake SIGZERO), and
2228 the list is terminated with a 0. Those numbers correspond to
2229 the value of the signal listed in the same place within the
2232 signal_t (d_voidsig.U):
2233 This variable holds the type of the signal handler (void or int).
2235 sitearch (sitearch.U):
2236 This variable contains the eventual value of the SITEARCH symbol,
2237 which is the name of the private library for this package. It may
2238 have a ~ on the front. It is up to the makefile to eventually create
2239 this directory while performing installation (with ~ substitution).
2241 sitearchexp (sitearch.U):
2242 This variable is the ~name expanded version of sitearch, so that you
2243 may use it directly in Makefiles or shell scripts.
2245 sitelib (sitelib.U):
2246 This variable contains the eventual value of the SITELIB symbol,
2247 which is the name of the private library for this package. It may
2248 have a ~ on the front. It is up to the makefile to eventually create
2249 this directory while performing installation (with ~ substitution).
2251 sitelibexp (sitelib.U):
2252 This variable is the ~name expanded version of sitelib, so that you
2253 may use it directly in Makefiles or shell scripts.
2255 sizetype (sizetype.U):
2256 This variable defines sizetype to be something like size_t,
2257 unsigned long, or whatever type is used to declare length
2258 parameters for string functions.
2261 This variable is defined but not used by Configure.
2262 The value is a plain '' and is not useful.
2265 This variable is defined but not used by Configure.
2266 The value is a plain '' and is not useful.
2269 This variable contains a flag which will tell the C compiler and loader
2270 to produce a program running with a small memory model. It is up to
2271 the Makefile to use this.
2274 This variable holds the extension used to identify shared libraries
2275 (also known as shared objects) on the system. Usually set to 'so'.
2277 sockethdr (d_socket.U):
2278 This variable has any cpp '-I' flags needed for socket support.
2280 socketlib (d_socket.U):
2281 This variable has the names of any libraries needed for socket support.
2284 This variable is be used internally by Configure to determine the
2285 full pathname (if any) of the sort program. After Configure runs,
2286 the value is reset to a plain "sort" and is not useful.
2288 spackage (package.U):
2289 This variable contains the name of the package being constructed,
2290 with the first letter uppercased, i.e. suitable for starting
2293 spitshell (spitshell.U):
2294 This variable contains the command necessary to spit out a runnable
2295 shell on this system. It is either cat or a grep '-v' for # comments.
2298 This variable contains a flag which will tell the C compiler and loader
2299 to produce a program that will run in separate I and D space, for those
2300 machines that support separation of instruction and data space. It is
2301 up to the Makefile to use this.
2304 This variable holds the path to the package source. It is up to
2305 the Makefile to use this variable and set VPATH accordingly to
2306 find the sources remotely.
2308 ssizetype (ssizetype.U):
2309 This variable defines ssizetype to be something like ssize_t,
2310 long or int. It is used by functions that return a count
2311 of bytes or an error condition. It must be a signed type.
2312 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2314 startperl (startperl.U):
2315 This variable contains the string to put on the front of a perl
2316 script to make sure (hopefully) that it runs with perl and not some
2317 shell. Of course, that leading line must be followed by the classical
2319 eval 'exec perl -S $0 ${1+"$@"}'
2320 if $running_under_some_shell;
2321 to guarantee perl startup should the shell execute the script. Note
2322 that this magic incatation is not understood by csh.
2324 startsh (startsh.U):
2325 This variable contains the string to put on the front of a shell
2326 script to make sure (hopefully) that it runs with sh and not some
2329 static_ext (Extensions.U):
2330 This variable holds a list of XS extension files we want to
2331 link statically into the package. It is used by Makefile.
2333 stdchar (stdchar.U):
2334 This variable conditionally defines STDCHAR to be the type of char
2335 used in stdio.h. It has the values "unsigned char" or "char".
2337 stdio_base (d_stdstdio.U):
2338 This variable defines how, given a FILE pointer, fp, to access the
2339 _base field (or equivalent) of stdio.h's FILE structure. This will
2340 be used to define the macro FILE_base(fp).
2342 stdio_bufsiz (d_stdstdio.U):
2343 This variable defines how, given a FILE pointer, fp, to determine
2344 the number of bytes store in the I/O buffer pointer to by the
2345 _base field (or equivalent) of stdio.h's FILE structure. This will
2346 be used to define the macro FILE_bufsiz(fp).
2348 stdio_cnt (d_stdstdio.U):
2349 This variable defines how, given a FILE pointer, fp, to access the
2350 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2351 be used to define the macro FILE_cnt(fp).
2353 stdio_filbuf (d_stdstdio.U):
2354 This variable defines how, given a FILE pointer, fp, to tell
2355 stdio to refill it's internal buffers (?). This will
2356 be used to define the macro FILE_filbuf(fp).
2358 stdio_ptr (d_stdstdio.U):
2359 This variable defines how, given a FILE pointer, fp, to access the
2360 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2361 be used to define the macro FILE_ptr(fp).
2363 strings (i_string.U):
2364 This variable holds the full path of the string header that will be
2365 used. Typically /usr/include/string.h or /usr/include/strings.h.
2368 This variable is defined but not used by Configure.
2369 The value is a plain '' and is not useful.
2371 subversion (patchlevel.U):
2372 The subversion level of this package.
2373 The value of subversion comes from the patchlevel.h file.
2374 This is unique to perl.
2377 This variable holds the place where the manual is located on this
2378 system. It is not the place where the user wants to put his manual
2379 pages. Rather it is the place where Configure may look to find manual
2380 for unix commands (section 1 of the manual usually). See mansrc.
2383 This variable is defined but not used by Configure.
2384 The value is a plain '' and is not useful.
2387 This variable is defined but not used by Configure.
2388 The value is a plain '' and is not useful.
2391 This variable is defined but not used by Configure.
2392 The value is a plain '' and is not useful.
2395 This variable is be used internally by Configure to determine the
2396 full pathname (if any) of the tee program. After Configure runs,
2397 the value is reset to a plain "tee" and is not useful.
2400 This variable is be used internally by Configure to determine the
2401 full pathname (if any) of the test program. After Configure runs,
2402 the value is reset to a plain "test" and is not useful.
2404 timeincl (i_time.U):
2405 This variable holds the full path of the included time header(s).
2407 timetype (d_time.U):
2408 This variable holds the type returned by time(). It can be long,
2409 or time_t on BSD sites (in which case <sys/types.h> should be
2410 included). Anyway, the type Time_t should be used.
2413 This variable is be used internally by Configure to determine the
2414 full pathname (if any) of the touch program. After Configure runs,
2415 the value is reset to a plain "touch" and is not useful.
2418 This variable is be used internally by Configure to determine the
2419 full pathname (if any) of the tr program. After Configure runs,
2420 the value is reset to a plain "tr" and is not useful.
2423 This variable is defined but not used by Configure.
2424 The value is a plain '' and is not useful.
2426 uidtype (uidtype.U):
2427 This variable defines Uid_t to be something like uid_t, int,
2428 ushort, or whatever type is used to declare user ids in the kernel.
2431 This variable is be used internally by Configure to determine the
2432 full pathname (if any) of the uname program. After Configure runs,
2433 the value is reset to a plain "uname" and is not useful.
2436 This variable is be used internally by Configure to determine the
2437 full pathname (if any) of the uniq program. After Configure runs,
2438 the value is reset to a plain "uniq" and is not useful.
2441 This variable indicates if the the system supports dynamic
2442 loading of some sort. See also dlsrc and dlobj.
2444 usemymalloc (mallocsrc.U):
2445 This variable contains y if the malloc that comes with this package
2446 is desired over the system's version of malloc. People often include
2447 special versions of malloc for effiency, but such versions are often
2448 less portable. See also mallocsrc and mallocobj.
2449 If this is 'y', then -lmalloc is removed from $libs.
2452 This variable contains 'true' or 'false' depending whether the
2453 nm extraction is wanted or not.
2455 useopcode (Extensions.U):
2456 This variable holds either 'true' or 'false' to indicate
2457 whether the Opcode extension should be used. The sole
2458 use for this currently is to allow an easy mechanism
2459 for users to skip the Opcode extension from the Configure
2462 useperlio (useperlio.U):
2463 This variable conditionally defines the USE_PERLIO symbol,
2464 and indicates that the PerlIO abstraction should be
2467 useposix (Extensions.U):
2468 This variable holds either 'true' or 'false' to indicate
2469 whether the POSIX extension should be used. The sole
2470 use for this currently is to allow an easy mechanism
2471 for hints files to indicate that POSIX will not compile
2472 on a particular system.
2475 This variable is set to true when the user agrees to use sfio.
2476 It is set to false when sfio is not available or when the user
2477 explicitely requests not to use sfio. It is here primarily so
2478 that command-line settings can override the auto-detection of
2479 d_sfio without running into a "WHOA THERE".
2481 useshrplib (libperl.U):
2482 This variable is set to 'yes' if the user wishes
2483 to build a shared libperl, and 'no' otherwise.
2485 usethreads (usethreads.U):
2486 This variable conditionally defines the USE_THREADS symbol,
2487 and indicates that Perl should be built to use threads.
2489 usevfork (d_vfork.U):
2490 This variable is set to true when the user accepts to use vfork.
2491 It is set to false when no vfork is available or when the user
2492 explicitely requests not to use vfork.
2495 This variable holds the path of the include files, which is
2496 usually /usr/include. It is mainly used by other Configure units.
2499 This variable is defined but not used by Configure.
2500 The value is a plain '' and is not useful.
2502 version (patchlevel.U):
2503 The full version number of this package. This combines
2504 baserev, patchlevel, and subversion to get the full
2505 version number, including any possible subversions. Care
2506 is taken to use the C locale in order to get something
2507 like 5.004 instead of 5,004. This is unique to perl.
2510 This variable is defined but not used by Configure.
2511 The value is a plain '' and is not useful.
2513 voidflags (voidflags.U):
2514 This variable contains the eventual value of the VOIDFLAGS symbol,
2515 which indicates how much support of the void type is given by this
2516 compiler. See VOIDFLAGS for more info.
2519 This variable is defined but not used by Configure.
2520 The value is a plain '' and is not useful.
2523 This variable is be used internally by Configure to determine the
2524 full pathname (if any) of the zip program. After Configure runs,
2525 the value is reset to a plain "zip" and is not useful.