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.
6 This variable defines the extension used for ordinary libraries.
7 For unix, it is '.a'. The '.' is included. Other possible
11 This variable defines the extension used for executable files.
12 For unix it is empty. Other possible values include '.exe'.
15 This variable defines the extension used for object files.
16 For unix, it is '.o'. The '.' is included. Other possible
17 values include '.obj'.
20 This variable is set to 'true' if AFS (Andrew File System) is used
21 on the system, 'false' otherwise. It is possible to override this
22 with a hint value or command line option, but you'd better know
25 alignbytes (alignbytes.U):
26 This variable holds the number of bytes required to align a
27 double. Usual values are 2, 4 and 8.
29 aphostname (d_gethname.U):
30 Thie variable contains the command which can be used to compute the
31 host name. The command is fully qualified by its absolute path, to make
32 it safe when used by a process with super-user privileges.
35 This variable holds the name of the directory in which the user wants
36 to put architecture-dependent public library files for $package.
37 It is most often a local directory such as /usr/local/lib.
38 Programs using this variable must be prepared to deal
39 with filename expansion.
41 archlibexp (archlib.U):
42 This variable is the same as the archlib variable, but is
43 filename expanded at configuration time, for convenient use.
45 archname (archname.U):
46 This variable is a short name to characterize the current
47 architecture. It is used mainly to construct the default archlib.
50 This variable defines any additional objects that must be linked
51 in with the program on this architecture. On unix, it is usually
52 empty. It is typically used to include emulations of unix calls
53 or other facilities. For perl on OS/2, for example, this would
57 The base revision level of this package, from the .package file.
60 This variable holds the name of the directory in which the user wants
61 to put publicly executable images for the package in question. It
62 is most often a local directory such as /usr/local/bin. Programs using
63 this variable must be prepared to deal with ~name substitution.
66 This is the same as the bin variable, but is filename expanded at
67 configuration time, for use in your makefiles.
69 byteorder (byteorder.U):
70 This variable holds the byte order. In the following, larger digits
71 indicate more significance. The variable byteorder is either 4321
72 on a big-endian machine, or 1234 on a little-endian, or 87654321
73 on a Cray ... or 3412 with weird order !
76 This variable contains the \c string if that is what causes the echo
77 command to suppress newline. Otherwise it is null. Correct usage is
78 $echo $n "prompt for a question: $c".
80 castflags (d_castneg.U):
81 This variable contains a flag that precise difficulties the
82 compiler has casting odd floating values to unsigned long:
85 2 = couldn't cast >= 0x80000000
86 4 = couldn't cast in argument expression list
89 This variable holds the name of a command to execute a C compiler which
90 can resolve multiple global references that happen to have the same
91 name. Usual values are "cc", "Mcc", "cc -M", and "gcc".
94 This variable contains any special flags that might need to be
95 passed with cc -c to compile modules to be used to create a shared
96 library that will be used for dynamic loading. For hpux, this
97 should be +z. It is up to the makefile to use it.
100 This variable contains any special flags that might need to be
101 passed to cc to link with a shared library for dynamic loading.
102 It is up to the makefile to use it. For sunos 4.1, it should
106 This variable contains any additional C compiler flags desired by
107 the user. It is up to the Makefile to use this.
110 Login name of the person who ran the Configure script and answered the
111 questions. This is used to tag both config.sh and config_h.SH.
113 cf_email (cf_email.U):
114 Electronic mail address of the person who ran Configure. This can be
115 used by units that require the user's e-mail, like MailList.U.
118 Holds the output of the "date" command when the configuration file was
119 produced. This is used to tag both config.sh and config_h.SH.
121 clocktype (d_times.U):
122 This variable holds the type returned by times(). It can be long,
123 or clock_t on BSD sites (in which case <sys/types.h> should be
126 contains (contains.U):
127 This variable holds the command to do a grep with a proper return
128 status. On most sane systems it is simply "grep". On insane systems
129 it is a grep followed by a cat followed by a test. This variable
130 is primarily for the use of other Configure units.
132 cpp_stuff (cpp_stuff.U):
133 This variable contains an identification of the catenation mechanism
134 used by the C preprocessor.
136 cppflags (ccflags.U):
137 This variable holds the flags that will be passed to the C pre-
138 processor. It is up to the Makefile to use it.
140 cpplast (cppstdin.U):
141 This variable has the same functionality as cppminus, only it applies to
142 cpprun and not cppstdin.
144 cppminus (cppstdin.U):
145 This variable contains the second part of the string which will invoke
146 the C preprocessor on the standard input and produce to standard
147 output. This variable will have the value "-" if cppstdin needs a minus
148 to specify standard input, otherwise the value is "".
151 This variable contains the command which will invoke a C preprocessor
152 on standard input and put the output to stdout. It is guaranteed not
153 to be a wrapper and may be a null string if no preprocessor can be
154 made directly available. This preprocessor might be different from the
155 one used by the C compiler. Don't forget to append cpplast after the
156 preprocessor options.
158 cppstdin (cppstdin.U):
159 This variable contains the command which will invoke the C
160 preprocessor on standard input and put the output to stdout.
161 It is primarily used by other Configure units that ask about
162 preprocessor symbols.
164 cryptlib (d_crypt.U):
165 This variable holds -lcrypt or the path to a libcrypt.a archive if
166 the crypt() function is not defined in the standard C library. It is
167 up to the Makefile to use this.
169 d_Gconvert (d_gconvert.U):
170 This variable holds what Gconvert is defined as to convert
171 floating point numbers into strings. It could be 'gconvert'
172 or a more complex macro emulating gconvert with gcvt() or sprintf.
174 d_access (d_access.U):
175 This variable conditionally defines HAS_ACCESS if the access() system
176 call is available to check for access permissions using real IDs.
179 This variable conditionally defines the HAS_ALARM symbol, which
180 indicates to the C program that the alarm() routine is available.
182 d_archlib (archlib.U):
183 This variable conditionally defines ARCHLIB to hold the pathname
184 of architecture-dependent library files for $package. If
185 $archlib is the same as $privlib, then this is set to undef.
188 This variable conditionally defines the HAS_BCMP symbol if
189 the bcmp() routine is available to compare strings.
192 This variable conditionally defines the HAS_BCOPY symbol if
193 the bcopy() routine is available to copy strings.
196 This symbol conditionally defines the symbol BSD when running on a
199 d_bsdgetpgrp (d_getpgrp.U):
200 This variable conditionally defines USE_BSD_GETPGRP if
201 getpgrp needs one arguments whereas USG one needs none.
204 This variable conditionally defines the HAS_BZERO symbol if
205 the bzero() routine is available to set memory to 0.
207 d_casti32 (d_casti32.U):
208 This variable conditionally defines CASTI32, which indicates
209 whether the C compiler can cast large floats to 32-bit ints.
211 d_castneg (d_castneg.U):
212 This variable conditionally defines CASTNEG, which indicates
213 wether the C compiler can cast negative float to unsigned.
215 d_charvspr (d_vprintf.U):
216 This variable conditionally defines CHARVSPRINTF if this system
217 has vsprintf returning type (char*). The trend seems to be to
218 declare it as "int vsprintf()".
221 This variable conditionally defines the HAS_CHOWN symbol, which
222 indicates to the C program that the chown() routine is available.
224 d_chroot (d_chroot.U):
225 This variable conditionally defines the HAS_CHROOT symbol, which
226 indicates to the C program that the chroot() routine is available.
228 d_chsize (d_chsize.U):
229 This variable conditionally defines the CHSIZE symbol, which
230 indicates to the C program that the chsize() routine is available
231 to truncate files. You might need a -lx to get this routine.
233 d_closedir (d_closedir.U):
234 This variable conditionally defines HAS_CLOSEDIR if closedir() is
238 This variable conditionally defines the HASCONST symbol, which
239 indicates to the C program that this C compiler knows about the
243 This variable conditionally defines the CRYPT symbol, which
244 indicates to the C program that the crypt() routine is available
245 to encrypt passwords and the like.
248 This variable conditionally defines the CSH symbol, which
249 indicates to the C program that the C-shell exists.
251 d_cuserid (d_cuserid.U):
252 This variable conditionally defines the HAS_CUSERID symbol, which
253 indicates to the C program that the cuserid() routine is available
254 to get character login names.
256 d_dbl_dig (d_dbl_dig.U):
257 This variable conditionally defines d_dbl_dig if this system's
258 header files provide DBL_DIG, which is the number of significant
259 digits in a double precision number.
261 d_difftime (d_difftime.U):
262 This variable conditionally defines the HAS_DIFFTIME symbol, which
263 indicates to the C program that the difftime() routine is available.
265 d_dirnamlen (i_dirent.U):
266 This variable conditionally defines DIRNAMLEN, which indicates
267 to the C program that the length of directory entry names is
268 provided by a d_namelen field.
270 d_dlerror (d_dlerror.U):
271 This variable conditionally defines the HAS_DLERROR symbol, which
272 indicates to the C program that the dlerror() routine is available.
274 d_dlopen (d_dlopen.U):
275 This variable conditionally defines the HAS_DLOPEN symbol, which
276 indicates to the C program that the dlopen() routine is available.
278 d_dlsymun (d_dlsymun.U):
279 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
280 indicates that we need to prepend an underscore to the symbol
281 name before calling dlsym().
283 d_dosuid (d_dosuid.U):
284 This variable conditionally defines the symbol DOSUID, which
285 tells the C program that it should insert setuid emulation code
286 on hosts which have setuid #! scripts disabled.
289 This variable conditionally defines HAS_DUP2 if dup2() is
290 available to duplicate file descriptors.
292 d_endhent (d_endhent.U):
293 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
294 available to close whatever was being used for host queries.
296 d_endnent (d_endnent.U):
297 This variable conditionally defines HAS_ENDNETENT if endnetent() is
298 available to close whatever was being used for network queries.
300 d_endpent (d_endpent.U):
301 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
302 available to close whatever was being used for protocol queries.
304 d_endsent (d_endsent.U):
305 This variable conditionally defines HAS_ENDSERVENT if endservent() is
306 available to close whatever was being used for service queries.
308 d_eofnblk (nblock_io.U):
309 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
310 when reading from a non-blocking I/O source.
313 This variable conditionally defines the symbols EUNICE and VAX, which
314 alerts the C program that it must deal with ideosyncracies of VMS.
316 d_fchmod (d_fchmod.U):
317 This variable conditionally defines the HAS_FCHMOD symbol, which
318 indicates to the C program that the fchmod() routine is available
319 to change mode of opened files.
321 d_fchown (d_fchown.U):
322 This variable conditionally defines the HAS_FCHOWN symbol, which
323 indicates to the C program that the fchown() routine is available
324 to change ownership of opened files.
327 This variable conditionally defines the HAS_FCNTL symbol, and indicates
328 whether the fcntl() function exists
330 d_fd_macros (d_fd_set.U):
331 This variable contains the eventual value of the HAS_FD_MACROS symbol,
332 which indicates if your C compiler knows about the macros which
333 manipulate an fd_set.
335 d_fd_set (d_fd_set.U):
336 This variable contains the eventual value of the HAS_FD_SET symbol,
337 which indicates if your C compiler knows about the fd_set typedef.
339 d_fds_bits (d_fd_set.U):
340 This variable contains the eventual value of the HAS_FDS_BITS symbol,
341 which indicates if your fd_set typedef contains the fds_bits member.
342 If you have an fd_set typedef, but the dweebs who installed it did
343 a half-fast job and neglected to provide the macros to manipulate
344 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
346 d_fgetpos (d_fgetpos.U):
347 This variable conditionally defines HAS_FGETPOS if fgetpos() is
348 available to get the file position indicator.
350 d_flexfnam (d_flexfnam.U):
351 This variable conditionally defines the FLEXFILENAMES symbol, which
352 indicates that the system supports filenames longer than 14 characters.
355 This variable conditionally defines HAS_FLOCK if flock() is
356 available to do file locking.
359 This variable conditionally defines the HAS_FORK symbol, which
360 indicates to the C program that the fork() routine is available.
362 d_fpathconf (d_pathconf.U):
363 This variable conditionally defines the HAS_FPATHCONF symbol, which
364 indicates to the C program that the pathconf() routine is available
365 to determine file-system related limits and options associated
366 with a given open file descriptor.
368 d_fsetpos (d_fsetpos.U):
369 This variable conditionally defines HAS_FSETPOS if fsetpos() is
370 available to set the file position indicator.
373 This variable conditionally defines the HAS_FTIME symbol, which indicates
374 that the ftime() routine exists. The ftime() routine is basically
375 a sub-second accuracy clock.
377 d_getgrps (d_getgrps.U):
378 This variable conditionally defines the HAS_GETGROUPS symbol, which
379 indicates to the C program that the getgroups() routine is available
380 to get the list of process groups.
382 d_gethbyaddr (d_gethbyad.U):
383 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
384 indicates to the C program that the gethostbyaddr() routine is available
385 to look up hosts by their IP addresses.
387 d_gethent (d_gethent.U):
388 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
389 available to look up host names in some data base or another.
391 d_gethname (d_gethname.U):
392 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
393 indicates to the C program that the gethostname() routine may be
394 used to derive the host name.
396 d_getlogin (d_getlogin.U):
397 This variable conditionally defines the HAS_GETLOGIN symbol, which
398 indicates to the C program that the getlogin() routine is available
399 to get the login name.
401 d_getnbyaddr (d_getnbyad.U):
402 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
403 indicates to the C program that the getnetbyaddr() routine is available
404 to look up networks by their IP addresses.
406 d_getnbyname (d_getnbynm.U):
407 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
408 indicates to the C program that the getnetbyname() routine is available
409 to look up networks by their names.
411 d_getnent (d_getnent.U):
412 This variable conditionally defines HAS_GETNETENT if getnetent() is
413 available to look up network names in some data base or another.
415 d_getpbyname (d_getprotby.U):
416 This variable conditionally defines the HAS_GETPROTOBYNAME
417 symbol, which indicates to the C program that the
418 getprotobyname() routine is available to look up protocols
421 d_getpbynumber (d_getprotby.U):
422 This variable conditionally defines the HAS_GETPROTOBYNUMBER
423 symbol, which indicates to the C program that the
424 getprotobynumber() routine is available to look up protocols
427 d_getpent (d_getpent.U):
428 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
429 available to look up protocols in some data base or another.
431 d_getpgid (d_getpgid.U):
432 This variable conditionally defines the HAS_GETPGID symbol, which
433 indicates to the C program that the getpgid(pid) function
434 is available to get the process group id.
436 d_getpgrp2 (d_getpgrp2.U):
437 This variable conditionally defines the HAS_GETPGRP2 symbol, which
438 indicates to the C program that the getpgrp2() (as in DG/UX) routine
439 is available to get the current process group.
441 d_getpgrp (d_getpgrp.U):
442 This variable conditionally defines HAS_GETPGRP if getpgrp() is
443 available to get the current process group.
445 d_getppid (d_getppid.U):
446 This variable conditionally defines the HAS_GETPPID symbol, which
447 indicates to the C program that the getppid() routine is available
448 to get the parent process ID.
450 d_getprior (d_getprior.U):
451 This variable conditionally defines HAS_GETPRIORITY if getpriority()
452 is available to get a process's priority.
454 d_getsbyname (d_getsrvby.U):
455 This variable conditionally defines the HAS_GETSERVBYNAME
456 symbol, which indicates to the C program that the
457 getservbyname() routine is available to look up services
460 d_getsbyport (d_getsrvby.U):
461 This variable conditionally defines the HAS_GETSERVBYPORT
462 symbol, which indicates to the C program that the
463 getservbyport() routine is available to look up services
466 d_getsent (d_getsent.U):
467 This variable conditionally defines HAS_GETSERVENT if getservent() is
468 available to look up network services in some data base or another.
470 d_gettimeod (d_ftime.U):
471 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
472 indicates that the gettimeofday() system call exists (to obtain a
473 sub-second accuracy clock). You should probably include <sys/resource.h>.
475 d_gnulibc (d_gnulibc.U):
476 Defined if we're dealing with the GNU C Library.
479 This variable conditionally defines HAS_HTONL if htonl() and its
480 friends are available to do network order byte swapping.
482 d_index (d_strchr.U):
483 This variable conditionally defines HAS_INDEX if index() and
484 rindex() are available for string searching.
486 d_inetaton (d_inetaton.U):
487 This variable conditionally defines the HAS_INET_ATON symbol, which
488 indicates to the C program that the inet_aton() function is available
489 to parse IP address "dotted-quad" strings.
491 d_isascii (d_isascii.U):
492 This variable conditionally defines the HAS_ISASCII constant,
493 which indicates to the C program that isascii() is available.
495 d_killpg (d_killpg.U):
496 This variable conditionally defines the HAS_KILLPG symbol, which
497 indicates to the C program that the killpg() routine is available
498 to kill process groups.
501 This variable conditionally defines HAS_LINK if link() is
502 available to create hard links.
504 d_locconv (d_locconv.U):
505 This variable conditionally defines HAS_LOCALECONV if localeconv() is
506 available for numeric and monetary formatting conventions.
509 This variable conditionally defines HAS_LOCKF if lockf() is
510 available to do file locking.
512 d_longdbl (d_longdbl.U):
513 This variable conditionally defines HAS_LONG_DOUBLE if
514 the long double type is supported.
517 This variable conditionally defines HAS_LSTAT if lstat() is
518 available to do file stats on symbolic links.
521 This variable conditionally defines the HAS_MBLEN symbol, which
522 indicates to the C program that the mblen() routine is available
523 to find the number of bytes in a multibye character.
525 d_mbstowcs (d_mbstowcs.U):
526 This variable conditionally defines the HAS_MBSTOWCS symbol, which
527 indicates to the C program that the mbstowcs() routine is available
528 to convert a multibyte string into a wide character string.
530 d_mbtowc (d_mbtowc.U):
531 This variable conditionally defines the HAS_MBTOWC symbol, which
532 indicates to the C program that the mbtowc() routine is available
533 to convert multibyte to a wide character.
535 d_memcmp (d_memcmp.U):
536 This variable conditionally defines the HAS_MEMCMP symbol, which
537 indicates to the C program that the memcmp() routine is available
538 to compare blocks of memory.
540 d_memcpy (d_memcpy.U):
541 This variable conditionally defines the HAS_MEMCPY symbol, which
542 indicates to the C program that the memcpy() routine is available
543 to copy blocks of memory.
545 d_memmove (d_memmove.U):
546 This variable conditionally defines the HAS_MEMMOVE symbol, which
547 indicates to the C program that the memmove() routine is available
548 to copy potentatially overlapping blocks of memory.
550 d_memset (d_memset.U):
551 This variable conditionally defines the HAS_MEMSET symbol, which
552 indicates to the C program that the memset() routine is available
553 to set blocks of memory.
556 This variable conditionally defines the HAS_MKDIR symbol, which
557 indicates to the C program that the mkdir() routine is available
558 to create directories..
560 d_mkfifo (d_mkfifo.U):
561 This variable conditionally defines the HAS_MKFIFO symbol, which
562 indicates to the C program that the mkfifo() routine is available.
564 d_mkstemp (d_mkstemp.U):
565 This variable conditionally defines the HAS_MKSTEMP symbol, which
566 indicates to the C program that the mkstemp() routine is available
567 to create and open a unique tempporary file.
569 d_mktime (d_mktime.U):
570 This variable conditionally defines the HAS_MKTIME symbol, which
571 indicates to the C program that the mktime() routine is available.
574 This variable conditionally defines the HAS_MSG symbol, which
575 indicates that the entire msg*(2) library is present.
577 d_msgctl (d_msgctl.U):
578 This variable conditionally defines the HAS_MSGCTL symbol, which
579 indicates to the C program that the msgctl() routine is available.
581 d_msgget (d_msgget.U):
582 This variable conditionally defines the HAS_MSGGET symbol, which
583 indicates to the C program that the msgget() routine is available.
585 d_msgrcv (d_msgrcv.U):
586 This variable conditionally defines the HAS_MSGRCV symbol, which
587 indicates to the C program that the msgrcv() routine is available.
589 d_msgsnd (d_msgsnd.U):
590 This variable conditionally defines the HAS_MSGSND symbol, which
591 indicates to the C program that the msgsnd() routine is available.
593 d_mymalloc (mallocsrc.U):
594 This variable conditionally defines MYMALLOC in case other parts
595 of the source want to take special action if MYMALLOC is used.
596 This may include different sorts of profiling or error detection.
599 This variable conditionally defines the HAS_NICE symbol, which
600 indicates to the C program that the nice() routine is available.
602 d_oldpthreads (usethreads.U):
603 This variable conditionally defines the OLD_PTHREADS_API symbol,
604 and indicates that Perl should be built to use the old
605 draft POSIX threads API. This is only potneially meaningful if
608 d_oldsock (d_socket.U):
609 This variable conditionally defines the OLDSOCKET symbol, which
610 indicates that the BSD socket interface is based on 4.1c and not 4.2.
613 This variable conditionally defines the HAS_OPEN3 manifest constant,
614 which indicates to the C program that the 3 argument version of
615 the open(2) function is available.
617 d_pathconf (d_pathconf.U):
618 This variable conditionally defines the HAS_PATHCONF symbol, which
619 indicates to the C program that the pathconf() routine is available
620 to determine file-system related limits and options associated
621 with a given filename.
624 This variable conditionally defines the HAS_PAUSE symbol, which
625 indicates to the C program that the pause() routine is available
626 to suspend a process until a signal is received.
628 d_phostname (d_gethname.U):
629 This variable conditionally defines the PHOSTNAME symbol, which
630 contains the shell command which, when fed to popen(), may be
631 used to derive the host name.
634 This variable conditionally defines the HAS_PIPE symbol, which
635 indicates to the C program that the pipe() routine is available
636 to create an inter-process channel.
639 This variable conditionally defines the HAS_POLL symbol, which
640 indicates to the C program that the poll() routine is available
641 to poll active file descriptors.
643 d_portable (d_portable.U):
644 This variable conditionally defines the PORTABLE symbol, which
645 indicates to the C program that it should not assume that it is
646 running on the machine it was compiled on.
648 d_pthread_yield (d_pthread_y.U):
649 This variable conditionally defines the HAS_PTHREAD_YIELD
650 symbol if the pthread_yield routine is available to yield
651 the execution of the current thread.
653 d_pthreads_created_joinable (d_pthreadj.U):
654 This variable conditionally defines the PTHREADS_CREATED_JOINABLE
655 symbol if pthreads are created in the joinable (aka undetached)
659 This varaible conditionally defines PWAGE, which indicates
660 that struct passwd contains pw_age.
662 d_pwchange (i_pwd.U):
663 This varaible conditionally defines PWCHANGE, which indicates
664 that struct passwd contains pw_change.
667 This varaible conditionally defines PWCLASS, which indicates
668 that struct passwd contains pw_class.
670 d_pwcomment (i_pwd.U):
671 This varaible conditionally defines PWCOMMENT, which indicates
672 that struct passwd contains pw_comment.
674 d_pwexpire (i_pwd.U):
675 This varaible conditionally defines PWEXPIRE, which indicates
676 that struct passwd contains pw_expire.
679 This varaible conditionally defines PWQUOTA, which indicates
680 that struct passwd contains pw_quota.
682 d_readdir (d_readdir.U):
683 This variable conditionally defines HAS_READDIR if readdir() is
684 available to read directory entries.
686 d_readlink (d_readlink.U):
687 This variable conditionally defines the HAS_READLINK symbol, which
688 indicates to the C program that the readlink() routine is available
689 to read the value of a symbolic link.
691 d_rename (d_rename.U):
692 This variable conditionally defines the HAS_RENAME symbol, which
693 indicates to the C program that the rename() routine is available
696 d_rewinddir (d_readdir.U):
697 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
701 This variable conditionally defines HAS_RMDIR if rmdir() is
702 available to remove directories.
704 d_safebcpy (d_safebcpy.U):
705 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
706 the bcopy() routine can do overlapping copies.
708 d_safemcpy (d_safemcpy.U):
709 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
710 the memcpy() routine can do overlapping copies.
712 d_sanemcmp (d_sanemcmp.U):
713 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
714 the memcpy() routine is available and can be used to compare relative
715 magnitudes of chars with their high bits set.
717 d_sched_yield (d_pthread_y.U):
718 This variable conditionally defines the HAS_SCHED_YIELD
719 symbol if the sched_yield routine is available to yield
720 the execution of the current thread.
722 d_seekdir (d_readdir.U):
723 This variable conditionally defines HAS_SEEKDIR if seekdir() is
726 d_select (d_select.U):
727 This variable conditionally defines HAS_SELECT if select() is
728 available to select active file descriptors. A <sys/time.h>
729 inclusion may be necessary for the timeout field.
732 This variable conditionally defines the HAS_SEM symbol, which
733 indicates that the entire sem*(2) library is present.
735 d_semctl (d_semctl.U):
736 This variable conditionally defines the HAS_SEMCTL symbol, which
737 indicates to the C program that the semctl() routine is available.
739 d_semget (d_semget.U):
740 This variable conditionally defines the HAS_SEMGET symbol, which
741 indicates to the C program that the semget() routine is available.
744 This variable conditionally defines the HAS_SEMOP symbol, which
745 indicates to the C program that the semop() routine is available.
747 d_setegid (d_setegid.U):
748 This variable conditionally defines the HAS_SETEGID symbol, which
749 indicates to the C program that the setegid() routine is available
750 to change the effective gid of the current program.
752 d_seteuid (d_seteuid.U):
753 This variable conditionally defines the HAS_SETEUID symbol, which
754 indicates to the C program that the seteuid() routine is available
755 to change the effective uid of the current program.
757 d_setgrps (d_setgrps.U):
758 This variable conditionally defines the HAS_SETGROUPS symbol, which
759 indicates to the C program that the setgroups() routine is available
760 to set the list of process groups.
762 d_sethent (d_sethent.U):
763 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
766 d_setlinebuf (d_setlnbuf.U):
767 This variable conditionally defines the HAS_SETLINEBUF symbol, which
768 indicates to the C program that the setlinebuf() routine is available
769 to change stderr or stdout from block-buffered or unbuffered to a
772 d_setlocale (d_setlocale.U):
773 This variable conditionally defines HAS_SETLOCALE if setlocale() is
774 available to handle locale-specific ctype implementations.
776 d_setnent (d_setnent.U):
777 This variable conditionally defines HAS_SETNETENT if setnetent() is
780 d_setpent (d_setpent.U):
781 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
784 d_setpgid (d_setpgid.U):
785 This variable conditionally defines the HAS_SETPGID symbol if the
786 setpgid(pid, gpid) function is available to set process group ID.
788 d_setpgrp2 (d_setpgrp2.U):
789 This variable conditionally defines the HAS_SETPGRP2 symbol, which
790 indicates to the C program that the setpgrp2() (as in DG/UX) routine
791 is available to set the current process group.
793 d_setpgrp (d_setpgrp.U):
794 This variable conditionally defines HAS_SETPGRP if setpgrp() is
795 available to set the current process group.
797 d_setprior (d_setprior.U):
798 This variable conditionally defines HAS_SETPRIORITY if setpriority()
799 is available to set a process's priority.
801 d_setregid (d_setregid.U):
802 This variable conditionally defines HAS_SETREGID if setregid() is
803 available to change the real and effective gid of the current
806 d_setresgid (d_setregid.U):
807 This variable conditionally defines HAS_SETRESGID if setresgid() is
808 available to change the real, effective and saved gid of the current
811 d_setresuid (d_setreuid.U):
812 This variable conditionally defines HAS_SETREUID if setresuid() is
813 available to change the real, effective and saved uid of the current
816 d_setreuid (d_setreuid.U):
817 This variable conditionally defines HAS_SETREUID if setreuid() is
818 available to change the real and effective uid of the current
821 d_setrgid (d_setrgid.U):
822 This variable conditionally defines the HAS_SETRGID symbol, which
823 indicates to the C program that the setrgid() routine is available
824 to change the real gid of the current program.
826 d_setruid (d_setruid.U):
827 This variable conditionally defines the HAS_SETRUID symbol, which
828 indicates to the C program that the setruid() routine is available
829 to change the real uid of the current program.
831 d_setsent (d_setsent.U):
832 This variable conditionally defines HAS_SETSERVENT if setservent() is
835 d_setsid (d_setsid.U):
836 This variable conditionally defines HAS_SETSID if setsid() is
837 available to set the process group ID.
839 d_setvbuf (d_setvbuf.U):
840 This variable conditionally defines the HAS_SETVBUF symbol, which
841 indicates to the C program that the setvbuf() routine is available
842 to change buffering on an open stdio stream.
845 This variable conditionally defines the USE_SFIO symbol,
846 and indicates whether sfio is available (and should be used).
849 This variable conditionally defines the HAS_SHM symbol, which
850 indicates that the entire shm*(2) library is present.
853 This variable conditionally defines the HAS_SHMAT symbol, which
854 indicates to the C program that the shmat() routine is available.
856 d_shmatprototype (d_shmat.U):
857 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
858 symbol, which indicates that sys/shm.h has a prototype for
861 d_shmctl (d_shmctl.U):
862 This variable conditionally defines the HAS_SHMCTL symbol, which
863 indicates to the C program that the shmctl() routine is available.
866 This variable conditionally defines the HAS_SHMDT symbol, which
867 indicates to the C program that the shmdt() routine is available.
869 d_shmget (d_shmget.U):
870 This variable conditionally defines the HAS_SHMGET symbol, which
871 indicates to the C program that the shmget() routine is available.
873 d_sigaction (d_sigaction.U):
874 This variable conditionally defines the HAS_SIGACTION symbol, which
875 indicates that the Vr4 sigaction() routine is available.
877 d_sigsetjmp (d_sigsetjmp.U):
878 This variable conditionally defines the HAS_SIGSETJMP symbol,
879 which indicates that the sigsetjmp() routine is available to
880 call setjmp() and optionally save the process's signal mask.
882 d_socket (d_socket.U):
883 This variable conditionally defines HAS_SOCKET, which indicates
884 that the BSD socket interface is supported.
886 d_sockpair (d_socket.U):
887 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
888 indicates that the BSD socketpair() is supported.
890 d_statblks (d_statblks.U):
891 This variable conditionally defines USE_STAT_BLOCKS if this system
892 has a stat structure declaring st_blksize and st_blocks.
894 d_stdio_cnt_lval (d_stdstdio.U):
895 This variable conditionally defines STDIO_CNT_LVALUE if the
896 FILE_cnt macro can be used as an lvalue.
898 d_stdio_ptr_lval (d_stdstdio.U):
899 This variable conditionally defines STDIO_PTR_LVALUE if the
900 FILE_ptr macro can be used as an lvalue.
902 d_stdiobase (d_stdstdio.U):
903 This variable conditionally defines USE_STDIO_BASE if this system
904 has a FILE structure declaring a usable _base field (or equivalent)
907 d_stdstdio (d_stdstdio.U):
908 This variable conditionally defines USE_STDIO_PTR if this system
909 has a FILE structure declaring usable _ptr and _cnt fields (or
910 equivalent) in stdio.h.
912 d_strchr (d_strchr.U):
913 This variable conditionally defines HAS_STRCHR if strchr() and
914 strrchr() are available for string searching.
916 d_strcoll (d_strcoll.U):
917 This variable conditionally defines HAS_STRCOLL if strcoll() is
918 available to compare strings using collating information.
920 d_strctcpy (d_strctcpy.U):
921 This variable conditionally defines the USE_STRUCT_COPY symbol, which
922 indicates to the C program that this C compiler knows how to copy
925 d_strerrm (d_strerror.U):
926 This variable holds what Strerrr is defined as to translate an error
927 code condition into an error message string. It could be 'strerror'
928 or a more complex macro emulating strrror with sys_errlist[], or the
929 "unknown" string when both strerror and sys_errlist are missing.
931 d_strerror (d_strerror.U):
932 This variable conditionally defines HAS_STRERROR if strerror() is
933 available to translate error numbers to strings.
935 d_strtod (d_strtod.U):
936 This variable conditionally defines the HAS_STRTOD symbol, which
937 indicates to the C program that the strtod() routine is available
938 to provide better numeric string conversion than atof().
940 d_strtol (d_strtol.U):
941 This variable conditionally defines the HAS_STRTOL symbol, which
942 indicates to the C program that the strtol() routine is available
943 to provide better numeric string conversion than atoi() and friends.
945 d_strtoul (d_strtoul.U):
946 This variable conditionally defines the HAS_STRTOUL symbol, which
947 indicates to the C program that the strtoul() routine is available
948 to provide conversion of strings to unsigned long.
950 d_strxfrm (d_strxfrm.U):
951 This variable conditionally defines HAS_STRXFRM if strxfrm() is
952 available to transform strings.
954 d_suidsafe (d_dosuid.U):
955 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
956 if setuid scripts can be secure. This test looks in /dev/fd/.
958 d_symlink (d_symlink.U):
959 This variable conditionally defines the HAS_SYMLINK symbol, which
960 indicates to the C program that the symlink() routine is available
961 to create symbolic links.
963 d_syscall (d_syscall.U):
964 This variable conditionally defines HAS_SYSCALL if syscall() is
965 available call arbitrary system calls.
967 d_sysconf (d_sysconf.U):
968 This variable conditionally defines the HAS_SYSCONF symbol, which
969 indicates to the C program that the sysconf() routine is available
970 to determine system related limits and options.
972 d_sysernlst (d_strerror.U):
973 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
974 is available to translate error numbers to the symbolic name.
976 d_syserrlst (d_strerror.U):
977 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
978 available to translate error numbers to strings.
980 d_system (d_system.U):
981 This variable conditionally defines HAS_SYSTEM if system() is
982 available to issue a shell command.
984 d_tcgetpgrp (d_tcgtpgrp.U):
985 This variable conditionally defines the HAS_TCGETPGRP symbol, which
986 indicates to the C program that the tcgetpgrp() routine is available.
987 to get foreground process group ID.
989 d_tcsetpgrp (d_tcstpgrp.U):
990 This variable conditionally defines the HAS_TCSETPGRP symbol, which
991 indicates to the C program that the tcsetpgrp() routine is available
992 to set foreground process group ID.
994 d_telldir (d_readdir.U):
995 This variable conditionally defines HAS_TELLDIR if telldir() is
999 This variable conditionally defines the HAS_TIME symbol, which indicates
1000 that the time() routine exists. The time() routine is normaly
1001 provided on UNIX systems.
1003 d_times (d_times.U):
1004 This variable conditionally defines the HAS_TIMES symbol, which indicates
1005 that the times() routine exists. The times() routine is normaly
1006 provided on UNIX systems. You may have to include <sys/times.h>.
1008 d_truncate (d_truncate.U):
1009 This variable conditionally defines HAS_TRUNCATE if truncate() is
1010 available to truncate files.
1012 d_tzname (d_tzname.U):
1013 This variable conditionally defines HAS_TZNAME if tzname[] is
1014 available to access timezone names.
1016 d_umask (d_umask.U):
1017 This variable conditionally defines the HAS_UMASK symbol, which
1018 indicates to the C program that the umask() routine is available.
1019 to set and get the value of the file creation mask.
1021 d_uname (d_gethname.U):
1022 This variable conditionally defines the HAS_UNAME symbol, which
1023 indicates to the C program that the uname() routine may be
1024 used to derive the host name.
1026 d_vfork (d_vfork.U):
1027 This variable conditionally defines the HAS_VFORK symbol, which
1028 indicates the vfork() routine is available.
1030 d_void_closedir (d_closedir.U):
1031 This variable conditionally defines VOID_CLOSEDIR if closedir()
1032 does not return a value.
1034 d_voidsig (d_voidsig.U):
1035 This variable conditionally defines VOIDSIG if this system
1036 declares "void (*signal(...))()" in signal.h. The old way was to
1037 declare it as "int (*signal(...))()".
1039 d_voidtty (i_sysioctl.U):
1040 This variable conditionally defines USE_IOCNOTTY to indicate that the
1041 ioctl() call with TIOCNOTTY should be used to void tty association.
1042 Otherwise (on USG probably), it is enough to close the standard file
1043 decriptors and do a setpgrp().
1045 d_volatile (d_volatile.U):
1046 This variable conditionally defines the HASVOLATILE symbol, which
1047 indicates to the C program that this C compiler knows about the
1048 volatile declaration.
1050 d_vprintf (d_vprintf.U):
1051 This variable conditionally defines the HAS_VPRINTF symbol, which
1052 indicates to the C program that the vprintf() routine is available
1053 to printf with a pointer to an argument list.
1055 d_wait4 (d_wait4.U):
1056 This variable conditionally defines the HAS_WAIT4 symbol, which
1057 indicates the wait4() routine is available.
1059 d_waitpid (d_waitpid.U):
1060 This variable conditionally defines HAS_WAITPID if waitpid() is
1061 available to wait for child process.
1063 d_wcstombs (d_wcstombs.U):
1064 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1065 indicates to the C program that the wcstombs() routine is available
1066 to convert wide character strings to multibyte strings.
1068 d_wctomb (d_wctomb.U):
1069 This variable conditionally defines the HAS_WCTOMB symbol, which
1070 indicates to the C program that the wctomb() routine is available
1071 to convert a wide character to a multibyte.
1074 This variable conditionally defines the symbol XENIX, which alerts
1075 the C program that it runs under Xenix.
1077 db_hashtype (i_db.U):
1078 This variable contains the type of the hash structure element
1079 in the <db.h> header file. In older versions of DB, it was
1080 int, while in newer ones it is u_int32_t.
1082 db_prefixtype (i_db.U):
1083 This variable contains the type of the prefix structure element
1084 in the <db.h> header file. In older versions of DB, it was
1085 int, while in newer ones it is size_t.
1087 direntrytype (i_dirent.U):
1088 This symbol is set to 'struct direct' or 'struct dirent' depending on
1089 whether dirent is available or not. You should use this pseudo type to
1090 portably declare your directory entries.
1093 This variable contains the extension that is to be used for the
1094 dynamically loaded modules that perl generaties.
1097 This variable contains the name of the dynamic loading file that
1098 will be used with the package.
1100 doublesize (doublesize.U):
1101 This variable contains the value of the DOUBLESIZE symbol, which
1102 indicates to the C program how many bytes there are in a double.
1104 dynamic_ext (Extensions.U):
1105 This variable holds a list of extension files we want to
1106 link dynamically into the package. It is used by Makefile.
1108 eagain (nblock_io.U):
1109 This variable bears the symbolic errno code set by read() when no
1110 data is present on the file and non-blocking I/O was enabled (otherwise,
1111 read() blocks naturally).
1114 When running under Eunice this variable contains a command which will
1115 convert a shell script to the proper form of text file for it to be
1116 executable by the shell. On other systems it is a no-op.
1119 This is an old synonym for _exe.
1121 extensions (Extensions.U):
1122 This variable holds a list of all extension files
1123 linked into the package. It is propagated to Config.pm
1124 and is typically used to test whether a particular extesion
1127 firstmakefile (Unix.U):
1128 This variable defines the first file searched by make. On unix,
1129 it is makefile (then Makefile). On case-insensitive systems,
1130 it might be something else. This is only used to deal with
1131 convoluted make depend tricks.
1133 fpostype (fpostype.U):
1134 This variable defines Fpos_t to be something like fpost_t, long,
1135 uint, or whatever type is used to declare file positions in libc.
1137 freetype (mallocsrc.U):
1138 This variable contains the return type of free(). It is usually
1139 void, but occasionally int.
1142 This variable contains the full pathname to 'csh', whether or
1143 not the user has specified 'portability'. This is only used
1144 in the compiled C program, and we assume that all systems which
1145 can share this executable will have the same full pathname to
1148 full_sed (Loc_sed.U):
1149 This variable contains the full pathname to 'sed', whether or
1150 not the user has specified 'portability'. This is only used
1151 in the compiled C program, and we assume that all systems which
1152 can share this executable will have the same full pathname to
1156 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1157 indicate whether the compiler is version 1 or 2. This is used in
1158 setting some of the default cflags. It is set to '' if not gcc.
1160 gidtype (gidtype.U):
1161 This variable defines Gid_t to be something like gid_t, int,
1162 ushort, or whatever type is used to declare the return type
1163 of getgid(). Typically, it is the type of group ids in the kernel.
1166 This variable contains a command that produces the text of the
1167 /etc/group file. This is normally "cat /etc/group", but can be
1168 "ypcat group" when NIS is used.
1170 groupstype (groupstype.U):
1171 This variable defines Groups_t to be something like gid_t, int,
1172 ushort, or whatever type is used for the second argument to
1173 getgroups() and setgroups(). Usually, this is the same as
1174 gidtype (gid_t), but sometimes it isn't.
1176 h_fcntl (h_fcntl.U):
1177 This is variable gets set in various places to tell i_fcntl that
1178 <fcntl.h> should be included.
1180 h_sysfile (h_sysfile.U):
1181 This is variable gets set in various places to tell i_sys_file that
1182 <sys/file.h> should be included.
1185 Gives the type of hints used for previous answers. May be one of
1186 "default", "recommended" or "previous".
1189 This variable contains a command that produces the text of the
1190 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1191 "ypcat hosts" when NIS is used.
1194 This variable contains a flag which will tell the C compiler and loader
1195 to produce a program running with a huge memory model. If the
1196 huge model is not supported, contains the flag to produce large
1197 model programs. It is up to the Makefile to use this.
1199 i_bsdioctl (i_sysioctl.U):
1200 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1201 indicates to the C program that <sys/bsdioctl.h> exists and should
1205 This variable conditionally defines the I_DB symbol, and indicates
1206 whether a C program may include Berkeley's DB include file <db.h>.
1208 i_dirent (i_dirent.U):
1209 This variable conditionally defines I_DIRENT, which indicates
1210 to the C program that it should include <dirent.h>.
1213 This variable conditionally defines the I_DLD symbol, which
1214 indicates to the C program that <dld.h> (GNU dynamic loading)
1215 exists and should be included.
1217 i_dlfcn (i_dlfcn.U):
1218 This variable conditionally defines the I_DLFCN symbol, which
1219 indicates to the C program that <dlfcn.h> exists and should
1222 i_fcntl (i_fcntl.U):
1223 This variable controls the value of I_FCNTL (which tells
1224 the C program to include <fcntl.h>).
1226 i_float (i_float.U):
1227 This variable conditionally defines the I_FLOAT symbol, and indicates
1228 whether a C program may include <float.h> to get symbols like DBL_MAX
1229 or DBL_MIN, i.e. machine dependent floating point values.
1232 This variable conditionally defines the I_GRP symbol, and indicates
1233 whether a C program should include <grp.h>.
1235 i_limits (i_limits.U):
1236 This variable conditionally defines the I_LIMITS symbol, and indicates
1237 whether a C program may include <limits.h> to get symbols like WORD_BIT
1240 i_locale (i_locale.U):
1241 This variable conditionally defines the I_LOCALE symbol,
1242 and indicates whether a C program should include <locale.h>.
1244 i_malloc (i_malloc.U):
1245 This variable conditionally defines the I_MALLOC symbol, and indicates
1246 whether a C program should include <malloc.h>.
1249 This variable conditionally defines the I_MATH symbol, and indicates
1250 whether a C program may include <math.h>.
1252 i_memory (i_memory.U):
1253 This variable conditionally defines the I_MEMORY symbol, and indicates
1254 whether a C program should include <memory.h>.
1256 i_netdb (i_netdb.U):
1257 This variable conditionally defines the I_NETDB symbol, and indicates
1258 whether a C program should include <netdb.h>.
1260 i_neterrno (i_neterrno.U):
1261 This variable conditionally defines the I_NET_ERRNO symbol, which
1262 indicates to the C program that <net/errno.h> exists and should
1266 This variable conditionally defines I_NETINET_IN, which indicates
1267 to the C program that it should include <netinet/in.h>. Otherwise,
1268 you may try <sys/in.h>.
1271 This variable conditionally defines I_PWD, which indicates
1272 to the C program that it should include <pwd.h>.
1274 i_rpcsvcdbm (i_dbm.U):
1275 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1276 indicates to the C program that <rpcsvc/dbm.h> exists and should
1277 be included. Some System V systems might need this instead of <dbm.h>.
1280 This variable conditionally defines the I_SFIO symbol,
1281 and indicates whether a C program should include <sfio.h>.
1283 i_sgtty (i_termio.U):
1284 This variable conditionally defines the I_SGTTY symbol, which
1285 indicates to the C program that it should include <sgtty.h> rather
1288 i_stdarg (i_varhdr.U):
1289 This variable conditionally defines the I_STDARG symbol, which
1290 indicates to the C program that <stdarg.h> exists and should
1293 i_stddef (i_stddef.U):
1294 This variable conditionally defines the I_STDDEF symbol, which
1295 indicates to the C program that <stddef.h> exists and should
1298 i_stdlib (i_stdlib.U):
1299 This variable conditionally defines the I_STDLIB symbol, which
1300 indicates to the C program that <stdlib.h> exists and should
1303 i_string (i_string.U):
1304 This variable conditionally defines the I_STRING symbol, which
1305 indicates that <string.h> should be included rather than <strings.h>.
1307 i_sysdir (i_sysdir.U):
1308 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1309 whether a C program should include <sys/dir.h>.
1311 i_sysfile (i_sysfile.U):
1312 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1313 whether a C program should include <sys/file.h> to get R_OK and friends.
1315 i_sysfilio (i_sysioctl.U):
1316 This variable conditionally defines the I_SYS_FILIO symbol, which
1317 indicates to the C program that <sys/filio.h> exists and should
1318 be included in preference to <sys/ioctl.h>.
1321 This variable conditionally defines I_SYS_IN, which indicates
1322 to the C program that it should include <sys/in.h> instead of
1325 i_sysioctl (i_sysioctl.U):
1326 This variable conditionally defines the I_SYS_IOCTL symbol, which
1327 indicates to the C program that <sys/ioctl.h> exists and should
1330 i_sysndir (i_sysndir.U):
1331 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1332 whether a C program should include <sys/ndir.h>.
1334 i_sysparam (i_sysparam.U):
1335 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1336 whether a C program should include <sys/param.h>.
1338 i_sysresrc (i_sysresrc.U):
1339 This variable conditionally defines the I_SYS_RESOURCE symbol,
1340 and indicates whether a C program should include <sys/resource.h>.
1342 i_sysselct (i_sysselct.U):
1343 This variable conditionally defines I_SYS_SELECT, which indicates
1344 to the C program that it should include <sys/select.h> in order to
1345 get the definition of struct timeval.
1347 i_syssockio (i_sysioctl.U):
1348 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1349 C program that socket ioctl codes may be found in <sys/sockio.h>
1350 instead of <sys/ioctl.h>.
1352 i_sysstat (i_sysstat.U):
1353 This variable conditionally defines the I_SYS_STAT symbol,
1354 and indicates whether a C program should include <sys/stat.h>.
1356 i_systime (i_time.U):
1357 This variable conditionally defines I_SYS_TIME, which indicates
1358 to the C program that it should include <sys/time.h>.
1360 i_systimek (i_time.U):
1361 This variable conditionally defines I_SYS_TIME_KERNEL, which
1362 indicates to the C program that it should include <sys/time.h>
1363 with KERNEL defined.
1365 i_systimes (i_systimes.U):
1366 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1367 whether a C program should include <sys/times.h>.
1369 i_systypes (i_systypes.U):
1370 This variable conditionally defines the I_SYS_TYPES symbol,
1371 and indicates whether a C program should include <sys/types.h>.
1373 i_sysun (i_sysun.U):
1374 This variable conditionally defines I_SYS_UN, which indicates
1375 to the C program that it should include <sys/un.h> to get UNIX
1376 domain socket definitions.
1378 i_syswait (i_syswait.U):
1379 This variable conditionally defines I_SYS_WAIT, which indicates
1380 to the C program that it should include <sys/wait.h>.
1382 i_termio (i_termio.U):
1383 This variable conditionally defines the I_TERMIO symbol, which
1384 indicates to the C program that it should include <termio.h> rather
1387 i_termios (i_termio.U):
1388 This variable conditionally defines the I_TERMIOS symbol, which
1389 indicates to the C program that the POSIX <termios.h> file is
1393 This variable conditionally defines I_TIME, which indicates
1394 to the C program that it should include <time.h>.
1396 i_unistd (i_unistd.U):
1397 This variable conditionally defines the I_UNISTD symbol, and indicates
1398 whether a C program should include <unistd.h>.
1400 i_utime (i_utime.U):
1401 This variable conditionally defines the I_UTIME symbol, and indicates
1402 whether a C program should include <utime.h>.
1404 i_values (i_values.U):
1405 This variable conditionally defines the I_VALUES symbol, and indicates
1406 whether a C program may include <values.h> to get symbols like MAXLONG
1409 i_varargs (i_varhdr.U):
1410 This variable conditionally defines I_VARARGS, which indicates
1411 to the C program that it should include <varargs.h>.
1413 i_varhdr (i_varhdr.U):
1414 Contains the name of the header to be included to get va_dcl definition.
1415 Typically one of varargs.h or stdarg.h.
1417 i_vfork (i_vfork.U):
1418 This variable conditionally defines the I_VFORK symbol, and indicates
1419 whether a C program should include vfork.h.
1422 This variable must preceed the normal include path to get hte
1423 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
1424 Value can be "" or "/bsd43" on mips.
1426 installarchlib (archlib.U):
1427 This variable is really the same as archlibexp but may differ on
1428 those systems using AFS. For extra portability, only this variable
1429 should be used in makefiles.
1432 This variable is the same as binexp unless AFS is running in which case
1433 the user is explicitely prompted for it. This variable should always
1434 be used in your makefiles for maximum portability.
1436 installman1dir (man1dir.U):
1437 This variable is really the same as man1direxp, unless you are using
1438 AFS in which case it points to the read/write location whereas
1439 man1direxp only points to the read-only access location. For extra
1440 portability, you should only use this variable within your makefiles.
1442 installman3dir (man3dir.U):
1443 This variable is really the same as man3direxp, unless you are using
1444 AFS in which case it points to the read/write location whereas
1445 man3direxp only points to the read-only access location. For extra
1446 portability, you should only use this variable within your makefiles.
1448 installprivlib (privlib.U):
1449 This variable is really the same as privlibexp but may differ on
1450 those systems using AFS. For extra portability, only this variable
1451 should be used in makefiles.
1453 installscript (scriptdir.U):
1454 This variable is usually the same as scriptdirexp, unless you are on
1455 a system running AFS, in which case they may differ slightly. You
1456 should always use this variable within your makefiles for portability.
1458 installsitearch (sitearch.U):
1459 This variable is really the same as sitearchexp but may differ on
1460 those systems using AFS. For extra portability, only this variable
1461 should be used in makefiles.
1463 installsitelib (sitelib.U):
1464 This variable is really the same as sitelibexp but may differ on
1465 those systems using AFS. For extra portability, only this variable
1466 should be used in makefiles.
1468 intsize (intsize.U):
1469 This variable contains the value of the INTSIZE symbol, which
1470 indicates to the C program how many bytes there are in an int.
1472 known_extensions (Extensions.U):
1473 This variable holds a list of all extensions included in
1477 This variable contains a flag which will tell the C compiler and loader
1478 to produce a program running with a large memory model. It is up to
1479 the Makefile to use this.
1482 This variable indicates the program to be used to link
1483 libraries for dynamic loading. On some systems, it is 'ld'.
1484 On ELF systems, it should be $cc. Mostly, we'll try to respect
1485 the hint file setting.
1487 lddlflags (dlsrc.U):
1488 This variable contains any special flags that might need to be
1489 passed to $ld to create a shared library suitable for dynamic
1490 loading. It is up to the makefile to use it. For hpux, it
1491 should be -b. For sunos 4.1, it is empty.
1493 ldflags (ccflags.U):
1494 This variable contains any additional C loader flags desired by
1495 the user. It is up to the Makefile to use this.
1498 This is an old synonym for _a.
1501 This variable contains the location of the C library.
1503 libperl (libperl.U):
1504 The perl executable is obtained by linking perlmain.c with
1505 libperl, any static extensions (usually just DynaLoader),
1506 and any other libraries needed on this system. libperl
1507 is usually libperl.a, but can also be libperl.so.xxx if
1508 the user wishes to build a perl executable with a shared
1512 This variable holds the general path used to find libraries. It is
1513 intended to be used by other units.
1516 This variable holds the additional libraries we want to use.
1517 It is up to the Makefile to deal with it.
1519 libswanted (Myinit.U):
1520 This variable holds a list of all the libraries we want to
1521 search. The order is chosen to pick up the c library
1522 ahead of ucb or bsd libraries for SVR4.
1524 lkflags (ccflags.U):
1525 This variable contains any additional C partial linker flags desired by
1526 the user. It is up to the Makefile to use this.
1529 This variable holds the name of the command to make
1530 symbolic links (if they are supported). It can be used
1531 in the Makefile. It is either 'ln -s' or 'ln'
1533 locincpth (ccflags.U):
1534 This variable contains a list of additional directories to be
1535 searched by the compiler. The appropriate -I directives will
1536 be added to ccflags. This is intended to simplify setting
1537 local directories from the Configure command line.
1538 It's not much, but it parallels the loclibpth stuff in libpth.U.
1540 loclibpth (libpth.U):
1541 This variable holds the paths used to find local libraries. It is
1542 prepended to libpth, and is intended to be easily set from the
1545 longdblsize (d_longdbl.U):
1546 This variable contains the value of the LONG_DOUBLESIZE symbol, which
1547 indicates to the C program how many bytes there are in a long double,
1548 if this system supports long doubles.
1550 longsize (intsize.U):
1551 This variable contains the value of the LONGSIZE symbol, which
1552 indicates to the C program how many bytes there are in a long.
1554 lseektype (lseektype.U):
1555 This variable defines lseektype to be something like off_t, long,
1556 or whatever type is used to declare lseek offset's type in the
1557 kernel (which also appears to be lseek's return type).
1559 make_set_make (make.U):
1560 Some versions of 'make' set the variable MAKE. Others do not.
1561 This variable contains the string to be included in Makefile.SH
1562 so that MAKE is set if needed, and not if not needed.
1563 Possible values are:
1564 make_set_make='#' # If your make program handles this for you,
1565 make_set_make="MAKE=$make" # if it doesn't.
1566 I used a comment character so that we can distinguish a
1567 'set' value (from a previous config.sh or Configure -D option)
1568 from an uncomputed value.
1570 mallocobj (mallocsrc.U):
1571 This variable contains the name of the malloc.o that this package
1572 generates, if that malloc.o is preferred over the system malloc.
1573 Otherwise the value is null. This variable is intended for generating
1574 Makefiles. See mallocsrc.
1576 mallocsrc (mallocsrc.U):
1577 This variable contains the name of the malloc.c that comes with
1578 the package, if that malloc.c is preferred over the system malloc.
1579 Otherwise the value is null. This variable is intended for generating
1582 malloctype (mallocsrc.U):
1583 This variable contains the kind of ptr returned by malloc and realloc.
1585 man1dir (man1dir.U):
1586 This variable contains the name of the directory in which manual
1587 source pages are to be put. It is the responsibility of the
1588 Makefile.SH to get the value of this into the proper command.
1589 You must be prepared to do the ~name expansion yourself.
1591 man1direxp (man1dir.U):
1592 This variable is the same as the man1dir variable, but is filename
1593 expanded at configuration time, for convenient use in makefiles.
1595 man1ext (man1dir.U):
1596 This variable contains the extension that the manual page should
1597 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
1600 man3dir (man3dir.U):
1601 This variable contains the name of the directory in which manual
1602 source pages are to be put. It is the responsibility of the
1603 Makefile.SH to get the value of this into the proper command.
1604 You must be prepared to do the ~name expansion yourself.
1606 man3direxp (man3dir.U):
1607 This variable is the same as the man3dir variable, but is filename
1608 expanded at configuration time, for convenient use in makefiles.
1610 man3ext (man3dir.U):
1611 This variable contains the extension that the manual page should
1612 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
1616 This variable contains a flag which will tell the C compiler and loader
1617 to produce a program running with a medium memory model. If the
1618 medium model is not supported, contains the flag to produce large
1619 model programs. It is up to the Makefile to use this.
1621 mips_type (usrinc.U):
1622 This variable holds the environment type for the mips system.
1623 Possible values are "BSD 4.3" and "System V".
1626 This variable contains the list of memory models supported by this
1627 system. Possible component values are none, split, unsplit, small,
1628 medium, large, and huge. The component values are space separated.
1630 modetype (modetype.U):
1631 This variable defines modetype to be something like mode_t,
1632 int, unsigned short, or whatever type is used to declare file
1633 modes for system calls.
1635 myarchname (archname.U):
1636 This variable holds the architecture name computed by Configure in
1637 a previous run. It is not intended to be perused by any user and
1638 should never be set in a hint file.
1640 mydomain (myhostname.U):
1641 This variable contains the eventual value of the MYDOMAIN symbol,
1642 which is the domain of the host the program is going to run on.
1643 The domain must be appended to myhostname to form a complete host name.
1644 The dot comes with mydomain, and need not be supplied by the program.
1646 myuname (Oldconfig.U):
1647 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
1648 pseudo variables assignments in the output are stripped, thank you. The
1649 whole thing is then lower-cased.
1652 This variable contains the -n flag if that is what causes the echo
1653 command to suppress newline. Otherwise it is null. Correct usage is
1654 $echo $n "prompt for a question: $c".
1656 netdb_hlen_type (netdbtype.U):
1657 This variable holds the type used for the 2nd argument to
1658 gethostbyaddr(). Usually, this is int or size_t or unsigned.
1659 This is only useful if you have gethostbyaddr(), naturally.
1661 netdb_host_type (netdbtype.U):
1662 This variable holds the type used for the 1st argument to
1663 gethostbyaddr(). Usually, this is char * or void *, possibly
1664 with or without a const prefix.
1665 This is only useful if you have gethostbyaddr(), naturally.
1667 netdb_name_type (netdbtype.U):
1668 This variable holds the type used for the argument to
1669 gethostbyname(). Usually, this is char * or const char *.
1670 This is only useful if you have gethostbyname(), naturally.
1672 netdb_net_type (netdbtype.U):
1673 This variable holds the type used for the 1st argument to
1674 getnetbyaddr(). Usually, this is int or long.
1675 This is only useful if you have getnetbyaddr(), naturally.
1678 This variable holds the options that may be necessary for nm.
1680 nm_so_opt (usenm.U):
1681 This variable holds the options that may be necessary for nm
1682 to work on a shared library but that can not be used on an
1683 archive library. Currently, this is only used by Linux, where
1684 nm --dynamic is *required* to get symbols from an ELF library which
1685 has been stripped, but nm --dynamic is *fatal* on an archive library.
1686 Maybe Linux should just always set usenm=false.
1688 o_nonblock (nblock_io.U):
1689 This variable bears the symbol value to be used during open() or fcntl()
1690 to turn on non-blocking I/O for a file descriptor. If you wish to switch
1691 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
1692 but that is only supported by some devices.
1695 This is an old synonym for _o.
1697 optimize (ccflags.U):
1698 This variable contains any optimizer/debugger flag that should be used.
1699 It is up to the Makefile to use it.
1701 orderlib (orderlib.U):
1702 This variable is "true" if the components of libraries must be ordered
1703 (with `lorder $* | tsort`) before placing them in an archive. Set to
1704 "false" if ranlib or ar can generate random libraries.
1706 osname (Oldconfig.U):
1707 This variable contains the operating system name (e.g. sunos,
1708 solaris, hpux, etc.). It can be useful later on for setting
1709 defaults. Any spaces are replaced with underscores. It is set
1710 to a null string if we can't figure it out.
1712 osvers (Oldconfig.U):
1713 This variable contains the operating system version (e.g.
1714 4.1.3, 5.2, etc.). It is primarily used for helping select
1715 an appropriate hints file, but might be useful elsewhere for
1716 setting defaults. It is set to '' if we can't figure it out.
1717 We try to be flexible about how much of the version number
1718 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
1719 same for this package, hints files might just be os_4.0 or
1720 os_4.1, etc., not keeping separate files for each little release.
1722 package (package.U):
1723 This variable contains the name of the package being constructed.
1724 It is primarily intended for the use of later Configure units.
1727 This variable contains the name of the preferred pager on the system.
1728 Usual values are (the full pathnames of) more, less, pg, or cat.
1731 This variable contains a command that produces the text of the
1732 /etc/passwd file. This is normally "cat /etc/passwd", but can be
1733 "ypcat passwd" when NIS is used.
1735 patchlevel (patchlevel.U):
1736 The patchlevel level of this package.
1737 The value of patchlevel comes from the patchlevel.h file.
1740 This is an old synonym for p_ in Head.U, the character
1741 used to separate elements in the command shell search PATH.
1743 perladmin (perladmin.U):
1744 Electronic mail address of the perl5 administrator.
1746 perlpath (perlpath.U):
1747 This variable contains the eventual value of the PERLPATH symbol,
1748 which contains the name of the perl interpreter to be used in
1749 shell scripts and in the "eval 'exec'" idiom.
1751 phostname (myhostname.U):
1752 This variable contains the eventual value of the PHOSTNAME symbol,
1753 which is a command that can be fed to popen() to get the host name.
1754 The program should probably not presume that the domain is or isn't
1757 pidtype (pidtype.U):
1758 This variable defines PIDTYPE to be something like pid_t, int,
1759 ushort, or whatever type is used to declare process ids in the kernel.
1762 Holds the private path used by Configure to find out the libraries.
1763 Its value is prepend to libpth. This variable takes care of special
1764 machines, like the mips. Usually, it should be empty.
1767 This variable holds the name of the directory below which the
1768 user will install the package. Usually, this is /usr/local, and
1769 executables go in /usr/local/bin, library stuff in /usr/local/lib,
1770 man pages in /usr/local/man, etc. It is only used to set defaults
1771 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
1773 prefixexp (prefix.U):
1774 This variable holds the full absolute path of the directory below
1775 which the user will install the package. Derived from prefix.
1777 privlib (privlib.U):
1778 This variable contains the eventual value of the PRIVLIB symbol,
1779 which is the name of the private library for this package. It may
1780 have a ~ on the front. It is up to the makefile to eventually create
1781 this directory while performing installation (with ~ substitution).
1783 privlibexp (privlib.U):
1784 This variable is the ~name expanded version of privlib, so that you
1785 may use it directly in Makefiles or shell scripts.
1787 prototype (prototype.U):
1788 This variable holds the eventual value of CAN_PROTOTYPE, which
1789 indicates the C compiler can handle funciton prototypes.
1791 ptrsize (ptrsize.U):
1792 This variable contains the value of the PTRSIZE symbol, which
1793 indicates to the C program how many bytes there are in a pointer.
1795 randbits (randbits.U):
1796 This variable contains the eventual value of the RANDBITS symbol,
1797 which indicates to the C program how many bits of random number
1798 the rand() function produces.
1800 ranlib (orderlib.U):
1801 This variable is set to the pathname of the ranlib program, if it is
1802 needed to generate random libraries. Set to ":" if ar can generate
1803 random libraries or if random libraries are not supported
1805 rd_nodata (nblock_io.U):
1806 This variable holds the return code from read() when no data is
1807 present. It should be -1, but some systems return 0 when O_NDELAY is
1808 used, which is a shame because you cannot make the difference between
1809 no data and an EOF.. Sigh!
1812 This variable contains 'true' or 'false' depending whether the
1813 nm extraction should be performed or not, according to the value
1814 of usenm and the flags on the Configure command line.
1816 scriptdir (scriptdir.U):
1817 This variable holds the name of the directory in which the user wants
1818 to put publicly scripts for the package in question. It is either
1819 the same directory as for binaries, or a special one that can be
1820 mounted across different architectures, like /usr/share. Programs
1821 must be prepared to deal with ~name expansion.
1823 scriptdirexp (scriptdir.U):
1824 This variable is the same as scriptdir, but is filename expanded
1825 at configuration time, for programs not wanting to bother with it.
1827 selecttype (selecttype.U):
1828 This variable holds the type used for the 2nd, 3rd, and 4th
1829 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
1830 is defined, and 'int *' otherwise. This is only useful if you
1831 have select(), naturally.
1834 This variable contains the full pathname of the shell used
1835 on this system to execute Bourne shell scripts. Usually, this will be
1836 /bin/sh, though it's possible that some systems will have /bin/ksh,
1837 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
1839 This unit comes before Options.U, so you can't set sh with a -D
1840 option, though you can override this (and startsh)
1841 with -O -Dsh=/bin/whatever -Dstartsh=whatever
1843 sharpbang (spitshell.U):
1844 This variable contains the string #! if this system supports that
1847 shmattype (d_shmat.U):
1848 This symbol contains the type of pointer returned by shmat().
1849 It can be 'void *' or 'char *'.
1851 shortsize (intsize.U):
1852 This variable contains the value of the SHORTSIZE symbol which
1853 indicates to the C program how many bytes there are in a short.
1855 shrpenv (libperl.U):
1856 If the user builds a shared libperl.so, then we need to tell the
1857 'perl' executable where it will be able to find the installed libperl.so.
1858 One way to do this on some systems is to set the environment variable
1859 LD_RUN_PATH to the directory that will be the final location of the
1860 shared libperl.so. The makefile can use this with something like
1861 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
1863 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
1866 See the main perl Makefile.SH for actual working usage.
1867 Alternatively, we might be able to use a command line option such
1868 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
1869 $archlibexp/CORE (Linux).
1871 shsharp (spitshell.U):
1872 This variable tells further Configure units whether your sh can
1875 sig_name (sig_name.U):
1876 This variable holds the signal names, space separated. The leading
1877 SIG in signal name is removed. A ZERO is prepended to the
1878 list. This is currently not used.
1880 sig_name_init (sig_name.U):
1881 This variable holds the signal names, enclosed in double quotes and
1882 separated by commas, suitable for use in the SIG_NAME definition
1883 below. A "ZERO" is prepended to the list, and the list is
1884 terminated with a plain 0. The leading SIG in signal names
1885 is removed. See sig_num.
1887 sig_num (sig_name.U):
1888 This variable holds the signal numbers, comma separated. A 0 is
1889 prepended to the list (corresponding to the fake SIGZERO), and
1890 the list is terminated with a 0. Those numbers correspond to
1891 the value of the signal listed in the same place within the
1894 signal_t (d_voidsig.U):
1895 This variable holds the type of the signal handler (void or int).
1897 sitearch (sitearch.U):
1898 This variable contains the eventual value of the SITEARCH symbol,
1899 which is the name of the private library for this package. It may
1900 have a ~ on the front. It is up to the makefile to eventually create
1901 this directory while performing installation (with ~ substitution).
1903 sitearchexp (sitearch.U):
1904 This variable is the ~name expanded version of sitearch, so that you
1905 may use it directly in Makefiles or shell scripts.
1907 sitelib (sitelib.U):
1908 This variable contains the eventual value of the SITELIB symbol,
1909 which is the name of the private library for this package. It may
1910 have a ~ on the front. It is up to the makefile to eventually create
1911 this directory while performing installation (with ~ substitution).
1913 sitelibexp (sitelib.U):
1914 This variable is the ~name expanded version of sitelib, so that you
1915 may use it directly in Makefiles or shell scripts.
1917 sizetype (sizetype.U):
1918 This variable defines sizetype to be something like size_t,
1919 unsigned long, or whatever type is used to declare length
1920 parameters for string functions.
1923 This variable contains a flag which will tell the C compiler and loader
1924 to produce a program running with a small memory model. It is up to
1925 the Makefile to use this.
1928 This variable holds the extension used to identify shared libraries
1929 (also known as shared objects) on the system. Usually set to 'so'.
1931 sockethdr (d_socket.U):
1932 This variable has any cpp -I flags needed for socket support.
1934 socketlib (d_socket.U):
1935 This variable has the names of any libraries needed for socket support.
1937 spackage (package.U):
1938 This variable contains the name of the package being constructed,
1939 with the first letter uppercased, i.e. suitable for starting
1942 spitshell (spitshell.U):
1943 This variable contains the command necessary to spit out a runnable
1944 shell on this system. It is either cat or a grep -v for # comments.
1947 This variable contains a flag which will tell the C compiler and loader
1948 to produce a program that will run in separate I and D space, for those
1949 machines that support separation of instruction and data space. It is
1950 up to the Makefile to use this.
1952 ssizetype (ssizetype.U):
1953 This variable defines ssizetype to be something like ssize_t,
1954 long or int. It is used by functions that return a count
1955 of bytes or an error condition. It must be a signed type.
1956 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
1958 startperl (startperl.U):
1959 This variable contains the string to put on the front of a perl
1960 script to make sure (hopefully) that it runs with perl and not some
1961 shell. Of course, that leading line must be followed by the classical
1963 eval 'exec perl -S $0 ${1+"$@"}'
1964 if $running_under_some_shell;
1965 to guarantee perl startup should the shell execute the script. Note
1966 that this magic incatation is not understood by csh.
1968 startsh (startsh.U):
1969 This variable contains the string to put on the front of a shell
1970 script to make sure (hopefully) that it runs with sh and not some
1973 static_ext (Extensions.U):
1974 This variable holds a list of extension files we want to
1975 link statically into the package. It is used by Makefile.
1977 stdchar (stdchar.U):
1978 This variable conditionally defines STDCHAR to be the type of char
1979 used in stdio.h. It has the values "unsigned char" or "char".
1981 stdio_base (d_stdstdio.U):
1982 This variable defines how, given a FILE pointer, fp, to access the
1983 _base field (or equivalent) of stdio.h's FILE structure. This will
1984 be used to define the macro FILE_base(fp).
1986 stdio_bufsiz (d_stdstdio.U):
1987 This variable defines how, given a FILE pointer, fp, to determine
1988 the number of bytes store in the I/O buffer pointer to by the
1989 _base field (or equivalent) of stdio.h's FILE structure. This will
1990 be used to define the macro FILE_bufsiz(fp).
1992 stdio_cnt (d_stdstdio.U):
1993 This variable defines how, given a FILE pointer, fp, to access the
1994 _cnt field (or equivalent) of stdio.h's FILE structure. This will
1995 be used to define the macro FILE_cnt(fp).
1997 stdio_filbuf (d_stdstdio.U):
1998 This variable defines how, given a FILE pointer, fp, to tell
1999 stdio to refill it's internal buffers (?). This will
2000 be used to define the macro FILE_filbuf(fp).
2002 stdio_ptr (d_stdstdio.U):
2003 This variable defines how, given a FILE pointer, fp, to access the
2004 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2005 be used to define the macro FILE_ptr(fp).
2007 strings (i_string.U):
2008 This variable holds the full path of the string header that will be
2009 used. Typically /usr/include/string.h or /usr/include/strings.h.
2011 subversion (patchlevel.U):
2012 The subversion level of this package.
2013 The value of subversion comes from the patchlevel.h file.
2014 This is unique to perl.
2017 This variable holds the place where the manual is located on this
2018 system. It is not the place where the user wants to put his manual
2019 pages. Rather it is the place where Configure may look to find manual
2020 for unix commands (section 1 of the manual usually). See mansrc.
2022 timeincl (i_time.U):
2023 This variable holds the full path of the included time header(s).
2025 timetype (d_time.U):
2026 This variable holds the type returned by time(). It can be long,
2027 or time_t on BSD sites (in which case <sys/types.h> should be
2028 included). Anyway, the type Time_t should be used.
2030 uidtype (uidtype.U):
2031 This variable defines Uid_t to be something like uid_t, int,
2032 ushort, or whatever type is used to declare user ids in the kernel.
2035 This variable indicates if the the system supports dynamic
2036 loading of some sort. See also dlsrc and dlobj.
2038 usemymalloc (mallocsrc.U):
2039 This variable contains y if the malloc that comes with this package
2040 is desired over the system's version of malloc. People often include
2041 special versions of malloc for effiency, but such versions are often
2042 less portable. See also mallocsrc and mallocobj.
2043 If this is 'y', then -lmalloc is removed from $libs.
2046 This variable contains 'true' or 'false' depending whether the
2047 nm extraction is wanted or not.
2049 useopcode (Extensions.U):
2050 This variable holds either 'true' or 'false' to indicate
2051 whether the Opcode extension should be used. The sole
2052 use for this currently is to allow an easy mechanism
2053 for users to skip the Opcode extension from the Configure
2056 useperlio (useperlio.U):
2057 This variable conditionally defines the USE_PERLIO symbol,
2058 and indicates that the PerlIO abstraction should be
2061 useposix (Extensions.U):
2062 This variable holds either 'true' or 'false' to indicate
2063 whether the POSIX extension should be used. The sole
2064 use for this currently is to allow an easy mechanism
2065 for hints files to indicate that POSIX will not compile
2066 on a particular system.
2069 This variable is set to true when the user agrees to use sfio.
2070 It is set to false when sfio is not available or when the user
2071 explicitely requests not to use sfio. It is here primarily so
2072 that command-line settings can override the auto-detection of
2073 d_sfio without running into a "WHOA THERE".
2075 useshrplib (libperl.U):
2076 This variable is set to 'yes' if the user wishes
2077 to build a shared libperl, and 'no' otherwise.
2079 usethreads (usethreads.U):
2080 This variable conditionally defines the USE_THREADS symbol,
2081 and indicates that Perl should be built to use threads.
2083 usevfork (d_vfork.U):
2084 This variable is set to true when the user accepts to use vfork.
2085 It is set to false when no vfork is available or when the user
2086 explicitely requests not to use vfork.
2089 This variable holds the path of the include files, which is
2090 usually /usr/include. It is mainly used by other Configure units.
2092 voidflags (voidflags.U):
2093 This variable contains the eventual value of the VOIDFLAGS symbol,
2094 which indicates how much support of the void type is given by this
2095 compiler. See VOIDFLAGS for more info.