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 ansi2knr (ansi2knr.U):
30 This variable is set if the user needs to run ansi2knr.
31 Currently, this is not supported, so we just abort.
33 aphostname (d_gethname.U):
34 Thie variable contains the command which can be used to compute the
35 host name. The command is fully qualified by its absolute path, to make
36 it safe when used by a process with super-user privileges.
38 apiversion (patchlevel.U):
39 This is a number which identifies the lowest version of perl
40 to have an API (for XS extensions) compatible with the present
41 version. For example, for 5.005_01, the apiversion should be
42 5.005, since 5.005_01 should be binary compatible with 5.005.
43 This should probably be incremented manually somehow, perhaps
44 from patchlevel.h. For now, we'll guess maintenance subversions
45 will retain binary compatibility.
48 This variable holds the name of the directory in which the user wants
49 to put architecture-dependent public library files for $package.
50 It is most often a local directory such as /usr/local/lib.
51 Programs using this variable must be prepared to deal
52 with filename expansion.
54 archlibexp (archlib.U):
55 This variable is the same as the archlib variable, but is
56 filename expanded at configuration time, for convenient use.
58 archname (archname.U):
59 This variable is a short name to characterize the current
60 architecture. It is used mainly to construct the default archlib.
63 This variable defines any additional objects that must be linked
64 in with the program on this architecture. On unix, it is usually
65 empty. It is typically used to include emulations of unix calls
66 or other facilities. For perl on OS/2, for example, this would
70 The base revision level of this package, from the .package file.
73 This variable holds the name of the directory in which the user wants
74 to put publicly executable images for the package in question. It
75 is most often a local directory such as /usr/local/bin. Programs using
76 this variable must be prepared to deal with ~name substitution.
79 This is the same as the bin variable, but is filename expanded at
80 configuration time, for use in your makefiles.
82 byteorder (byteorder.U):
83 This variable holds the byte order. In the following, larger digits
84 indicate more significance. The variable byteorder is either 4321
85 on a big-endian machine, or 1234 on a little-endian, or 87654321
86 on a Cray ... or 3412 with weird order !
89 This variable contains the \c string if that is what causes the echo
90 command to suppress newline. Otherwise it is null. Correct usage is
91 $echo $n "prompt for a question: $c".
93 castflags (d_castneg.U):
94 This variable contains a flag that precise difficulties the
95 compiler has casting odd floating values to unsigned long:
98 2 = couldn't cast >= 0x80000000
99 4 = couldn't cast in argument expression list
102 This variable holds the name of a command to execute a C compiler which
103 can resolve multiple global references that happen to have the same
104 name. Usual values are "cc", "Mcc", "cc -M", and "gcc".
106 cccdlflags (dlsrc.U):
107 This variable contains any special flags that might need to be
108 passed with cc -c to compile modules to be used to create a shared
109 library that will be used for dynamic loading. For hpux, this
110 should be +z. It is up to the makefile to use it.
113 This variable contains any special flags that might need to be
114 passed to cc to link with a shared library for dynamic loading.
115 It is up to the makefile to use it. For sunos 4.1, it should
119 This variable contains any additional C compiler flags desired by
120 the user. It is up to the Makefile to use this.
123 Login name of the person who ran the Configure script and answered the
124 questions. This is used to tag both config.sh and config_h.SH.
126 cf_email (cf_email.U):
127 Electronic mail address of the person who ran Configure. This can be
128 used by units that require the user's e-mail, like MailList.U.
131 Holds the output of the "date" command when the configuration file was
132 produced. This is used to tag both config.sh and config_h.SH.
134 clocktype (d_times.U):
135 This variable holds the type returned by times(). It can be long,
136 or clock_t on BSD sites (in which case <sys/types.h> should be
139 contains (contains.U):
140 This variable holds the command to do a grep with a proper return
141 status. On most sane systems it is simply "grep". On insane systems
142 it is a grep followed by a cat followed by a test. This variable
143 is primarily for the use of other Configure units.
145 cpp_stuff (cpp_stuff.U):
146 This variable contains an identification of the catenation mechanism
147 used by the C preprocessor.
149 cppflags (ccflags.U):
150 This variable holds the flags that will be passed to the C pre-
151 processor. It is up to the Makefile to use it.
153 cpplast (cppstdin.U):
154 This variable has the same functionality as cppminus, only it applies to
155 cpprun and not cppstdin.
157 cppminus (cppstdin.U):
158 This variable contains the second part of the string which will invoke
159 the C preprocessor on the standard input and produce to standard
160 output. This variable will have the value "-" if cppstdin needs a minus
161 to specify standard input, otherwise the value is "".
164 This variable contains the command which will invoke a C preprocessor
165 on standard input and put the output to stdout. It is guaranteed not
166 to be a wrapper and may be a null string if no preprocessor can be
167 made directly available. This preprocessor might be different from the
168 one used by the C compiler. Don't forget to append cpplast after the
169 preprocessor options.
171 cppstdin (cppstdin.U):
172 This variable contains the command which will invoke the C
173 preprocessor on standard input and put the output to stdout.
174 It is primarily used by other Configure units that ask about
175 preprocessor symbols.
177 cryptlib (d_crypt.U):
178 This variable holds -lcrypt or the path to a libcrypt.a archive if
179 the crypt() function is not defined in the standard C library. It is
180 up to the Makefile to use this.
182 d_Gconvert (d_gconvert.U):
183 This variable holds what Gconvert is defined as to convert
184 floating point numbers into strings. It could be 'gconvert'
185 or a more complex macro emulating gconvert with gcvt() or sprintf.
187 d_access (d_access.U):
188 This variable conditionally defines HAS_ACCESS if the access() system
189 call is available to check for access permissions using real IDs.
192 This variable conditionally defines the HAS_ALARM symbol, which
193 indicates to the C program that the alarm() routine is available.
195 d_archlib (archlib.U):
196 This variable conditionally defines ARCHLIB to hold the pathname
197 of architecture-dependent library files for $package. If
198 $archlib is the same as $privlib, then this is set to undef.
200 d_attribut (d_attribut.U):
201 This variable conditionally defines HASATTRIBUTE, which
202 indicates the C compiler can check for function attributes,
203 such as printf formats.
206 This variable conditionally defines the HAS_BCMP symbol if
207 the bcmp() routine is available to compare strings.
210 This variable conditionally defines the HAS_BCOPY symbol if
211 the bcopy() routine is available to copy strings.
214 This symbol conditionally defines the symbol BSD when running on a
217 d_bsdgetpgrp (d_getpgrp.U):
218 This variable conditionally defines USE_BSD_GETPGRP if
219 getpgrp needs one arguments whereas USG one needs none.
221 d_bsdsetpgrp (d_setpgrp.U):
222 This variable conditionally defines USE_BSD_SETPGRP if
223 setpgrp needs two arguments whereas USG one needs none.
224 See also d_setpgid for a POSIX interface.
227 This variable conditionally defines the HAS_BZERO symbol if
228 the bzero() routine is available to set memory to 0.
230 d_casti32 (d_casti32.U):
231 This variable conditionally defines CASTI32, which indicates
232 whether the C compiler can cast large floats to 32-bit ints.
234 d_castneg (d_castneg.U):
235 This variable conditionally defines CASTNEG, which indicates
236 wether the C compiler can cast negative float to unsigned.
238 d_charvspr (d_vprintf.U):
239 This variable conditionally defines CHARVSPRINTF if this system
240 has vsprintf returning type (char*). The trend seems to be to
241 declare it as "int vsprintf()".
244 This variable conditionally defines the HAS_CHOWN symbol, which
245 indicates to the C program that the chown() routine is available.
247 d_chroot (d_chroot.U):
248 This variable conditionally defines the HAS_CHROOT symbol, which
249 indicates to the C program that the chroot() routine is available.
251 d_chsize (d_chsize.U):
252 This variable conditionally defines the CHSIZE symbol, which
253 indicates to the C program that the chsize() routine is available
254 to truncate files. You might need a -lx to get this routine.
256 d_closedir (d_closedir.U):
257 This variable conditionally defines HAS_CLOSEDIR if closedir() is
261 This variable conditionally defines the HASCONST symbol, which
262 indicates to the C program that this C compiler knows about the
266 This variable conditionally defines the CRYPT symbol, which
267 indicates to the C program that the crypt() routine is available
268 to encrypt passwords and the like.
271 This variable conditionally defines the CSH symbol, which
272 indicates to the C program that the C-shell exists.
274 d_cuserid (d_cuserid.U):
275 This variable conditionally defines the HAS_CUSERID symbol, which
276 indicates to the C program that the cuserid() routine is available
277 to get character login names.
279 d_dbl_dig (d_dbl_dig.U):
280 This variable conditionally defines d_dbl_dig if this system's
281 header files provide DBL_DIG, which is the number of significant
282 digits in a double precision number.
284 d_difftime (d_difftime.U):
285 This variable conditionally defines the HAS_DIFFTIME symbol, which
286 indicates to the C program that the difftime() routine is available.
288 d_dirnamlen (i_dirent.U):
289 This variable conditionally defines DIRNAMLEN, which indicates
290 to the C program that the length of directory entry names is
291 provided by a d_namelen field.
293 d_dlerror (d_dlerror.U):
294 This variable conditionally defines the HAS_DLERROR symbol, which
295 indicates to the C program that the dlerror() routine is available.
297 d_dlopen (d_dlopen.U):
298 This variable conditionally defines the HAS_DLOPEN symbol, which
299 indicates to the C program that the dlopen() routine is available.
301 d_dlsymun (d_dlsymun.U):
302 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
303 indicates that we need to prepend an underscore to the symbol
304 name before calling dlsym().
306 d_dosuid (d_dosuid.U):
307 This variable conditionally defines the symbol DOSUID, which
308 tells the C program that it should insert setuid emulation code
309 on hosts which have setuid #! scripts disabled.
312 This variable conditionally defines HAS_DUP2 if dup2() is
313 available to duplicate file descriptors.
315 d_endhent (d_endhent.U):
316 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
317 available to close whatever was being used for host queries.
319 d_endnent (d_endnent.U):
320 This variable conditionally defines HAS_ENDNETENT if endnetent() is
321 available to close whatever was being used for network queries.
323 d_endpent (d_endpent.U):
324 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
325 available to close whatever was being used for protocol queries.
327 d_endsent (d_endsent.U):
328 This variable conditionally defines HAS_ENDSERVENT if endservent() is
329 available to close whatever was being used for service queries.
331 d_eofnblk (nblock_io.U):
332 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
333 when reading from a non-blocking I/O source.
336 This variable conditionally defines the symbols EUNICE and VAX, which
337 alerts the C program that it must deal with ideosyncracies of VMS.
339 d_fchmod (d_fchmod.U):
340 This variable conditionally defines the HAS_FCHMOD symbol, which
341 indicates to the C program that the fchmod() routine is available
342 to change mode of opened files.
344 d_fchown (d_fchown.U):
345 This variable conditionally defines the HAS_FCHOWN symbol, which
346 indicates to the C program that the fchown() routine is available
347 to change ownership of opened files.
350 This variable conditionally defines the HAS_FCNTL symbol, and indicates
351 whether the fcntl() function exists
353 d_fd_macros (d_fd_set.U):
354 This variable contains the eventual value of the HAS_FD_MACROS symbol,
355 which indicates if your C compiler knows about the macros which
356 manipulate an fd_set.
358 d_fd_set (d_fd_set.U):
359 This variable contains the eventual value of the HAS_FD_SET symbol,
360 which indicates if your C compiler knows about the fd_set typedef.
362 d_fds_bits (d_fd_set.U):
363 This variable contains the eventual value of the HAS_FDS_BITS symbol,
364 which indicates if your fd_set typedef contains the fds_bits member.
365 If you have an fd_set typedef, but the dweebs who installed it did
366 a half-fast job and neglected to provide the macros to manipulate
367 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
369 d_fgetpos (d_fgetpos.U):
370 This variable conditionally defines HAS_FGETPOS if fgetpos() is
371 available to get the file position indicator.
373 d_flexfnam (d_flexfnam.U):
374 This variable conditionally defines the FLEXFILENAMES symbol, which
375 indicates that the system supports filenames longer than 14 characters.
378 This variable conditionally defines HAS_FLOCK if flock() is
379 available to do file locking.
382 This variable conditionally defines the HAS_FORK symbol, which
383 indicates to the C program that the fork() routine is available.
385 d_fpathconf (d_pathconf.U):
386 This variable conditionally defines the HAS_FPATHCONF symbol, which
387 indicates to the C program that the pathconf() routine is available
388 to determine file-system related limits and options associated
389 with a given open file descriptor.
391 d_fsetpos (d_fsetpos.U):
392 This variable conditionally defines HAS_FSETPOS if fsetpos() is
393 available to set the file position indicator.
396 This variable conditionally defines the HAS_FTIME symbol, which indicates
397 that the ftime() routine exists. The ftime() routine is basically
398 a sub-second accuracy clock.
400 d_getgrps (d_getgrps.U):
401 This variable conditionally defines the HAS_GETGROUPS symbol, which
402 indicates to the C program that the getgroups() routine is available
403 to get the list of process groups.
405 d_gethbyaddr (d_gethbyad.U):
406 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
407 indicates to the C program that the gethostbyaddr() routine is available
408 to look up hosts by their IP addresses.
410 d_gethbyname (d_gethbynm.U):
411 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
412 indicates to the C program that the gethostbyname() routine is available
413 to look up host names in some data base or other.
415 d_gethent (d_gethent.U):
416 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
417 available to look up host names in some data base or another.
419 d_gethname (d_gethname.U):
420 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
421 indicates to the C program that the gethostname() routine may be
422 used to derive the host name.
424 d_gethostprotos (d_gethostprotos.U):
425 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
426 which indicates to the C program that <netdb.h> supplies
427 prototypes for the various gethost*() functions.
428 See also netdbtype.U for probing for various netdb types.
430 d_getlogin (d_getlogin.U):
431 This variable conditionally defines the HAS_GETLOGIN symbol, which
432 indicates to the C program that the getlogin() routine is available
433 to get the login name.
435 d_getnbyaddr (d_getnbyad.U):
436 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
437 indicates to the C program that the getnetbyaddr() routine is available
438 to look up networks by their IP addresses.
440 d_getnbyname (d_getnbynm.U):
441 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
442 indicates to the C program that the getnetbyname() routine is available
443 to look up networks by their names.
445 d_getnent (d_getnent.U):
446 This variable conditionally defines HAS_GETNETENT if getnetent() is
447 available to look up network names in some data base or another.
449 d_getnetprotos (d_getnetprotos.U):
450 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
451 which indicates to the C program that <netdb.h> supplies
452 prototypes for the various getnet*() functions.
453 See also netdbtype.U for probing for various netdb types.
455 d_getpbyname (d_getprotby.U):
456 This variable conditionally defines the HAS_GETPROTOBYNAME
457 symbol, which indicates to the C program that the
458 getprotobyname() routine is available to look up protocols
461 d_getpbynumber (d_getprotby.U):
462 This variable conditionally defines the HAS_GETPROTOBYNUMBER
463 symbol, which indicates to the C program that the
464 getprotobynumber() routine is available to look up protocols
467 d_getpent (d_getpent.U):
468 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
469 available to look up protocols in some data base or another.
471 d_getpgid (d_getpgid.U):
472 This variable conditionally defines the HAS_GETPGID symbol, which
473 indicates to the C program that the getpgid(pid) function
474 is available to get the process group id.
476 d_getpgrp2 (d_getpgrp2.U):
477 This variable conditionally defines the HAS_GETPGRP2 symbol, which
478 indicates to the C program that the getpgrp2() (as in DG/UX) routine
479 is available to get the current process group.
481 d_getpgrp (d_getpgrp.U):
482 This variable conditionally defines HAS_GETPGRP if getpgrp() is
483 available to get the current process group.
485 d_getppid (d_getppid.U):
486 This variable conditionally defines the HAS_GETPPID symbol, which
487 indicates to the C program that the getppid() routine is available
488 to get the parent process ID.
490 d_getprior (d_getprior.U):
491 This variable conditionally defines HAS_GETPRIORITY if getpriority()
492 is available to get a process's priority.
494 d_getprotoprotos (d_getprotoprotos.U):
495 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
496 which indicates to the C program that <netdb.h> supplies
497 prototypes for the various getproto*() functions.
498 See also netdbtype.U for probing for various netdb types.
500 d_getsbyname (d_getsrvby.U):
501 This variable conditionally defines the HAS_GETSERVBYNAME
502 symbol, which indicates to the C program that the
503 getservbyname() routine is available to look up services
506 d_getsbyport (d_getsrvby.U):
507 This variable conditionally defines the HAS_GETSERVBYPORT
508 symbol, which indicates to the C program that the
509 getservbyport() routine is available to look up services
512 d_getsent (d_getsent.U):
513 This variable conditionally defines HAS_GETSERVENT if getservent() is
514 available to look up network services in some data base or another.
516 d_getservprotos (d_getservprotos.U):
517 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
518 which indicates to the C program that <netdb.h> supplies
519 prototypes for the various getserv*() functions.
520 See also netdbtype.U for probing for various netdb types.
522 d_gettimeod (d_ftime.U):
523 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
524 indicates that the gettimeofday() system call exists (to obtain a
525 sub-second accuracy clock). You should probably include <sys/resource.h>.
527 d_gnulibc (d_gnulibc.U):
528 Defined if we're dealing with the GNU C Library.
531 This variable conditionally defines HAS_HTONL if htonl() and its
532 friends are available to do network order byte swapping.
534 d_index (d_strchr.U):
535 This variable conditionally defines HAS_INDEX if index() and
536 rindex() are available for string searching.
538 d_inetaton (d_inetaton.U):
539 This variable conditionally defines the HAS_INET_ATON symbol, which
540 indicates to the C program that the inet_aton() function is available
541 to parse IP address "dotted-quad" strings.
543 d_isascii (d_isascii.U):
544 This variable conditionally defines the HAS_ISASCII constant,
545 which indicates to the C program that isascii() is available.
547 d_killpg (d_killpg.U):
548 This variable conditionally defines the HAS_KILLPG symbol, which
549 indicates to the C program that the killpg() routine is available
550 to kill process groups.
552 d_lchown (d_lchown.U):
553 This variable conditionally defines the HAS_LCHOWN symbol, which
554 indicates to the C program that the lchown() routine is available
555 to operate on a symbolic link (instead of following the link).
558 This variable conditionally defines HAS_LINK if link() is
559 available to create hard links.
561 d_locconv (d_locconv.U):
562 This variable conditionally defines HAS_LOCALECONV if localeconv() is
563 available for numeric and monetary formatting conventions.
566 This variable conditionally defines HAS_LOCKF if lockf() is
567 available to do file locking.
569 d_longdbl (d_longdbl.U):
570 This variable conditionally defines HAS_LONG_DOUBLE if
571 the long double type is supported.
573 d_longlong (d_longlong.U):
574 This variable conditionally defines HAS_LONG_LONG if
575 the long long type is supported.
578 This variable conditionally defines HAS_LSTAT if lstat() is
579 available to do file stats on symbolic links.
582 This variable conditionally defines the HAS_MBLEN symbol, which
583 indicates to the C program that the mblen() routine is available
584 to find the number of bytes in a multibye character.
586 d_mbstowcs (d_mbstowcs.U):
587 This variable conditionally defines the HAS_MBSTOWCS symbol, which
588 indicates to the C program that the mbstowcs() routine is available
589 to convert a multibyte string into a wide character string.
591 d_mbtowc (d_mbtowc.U):
592 This variable conditionally defines the HAS_MBTOWC symbol, which
593 indicates to the C program that the mbtowc() routine is available
594 to convert multibyte to a wide character.
596 d_memcmp (d_memcmp.U):
597 This variable conditionally defines the HAS_MEMCMP symbol, which
598 indicates to the C program that the memcmp() routine is available
599 to compare blocks of memory.
601 d_memcpy (d_memcpy.U):
602 This variable conditionally defines the HAS_MEMCPY symbol, which
603 indicates to the C program that the memcpy() routine is available
604 to copy blocks of memory.
606 d_memmove (d_memmove.U):
607 This variable conditionally defines the HAS_MEMMOVE symbol, which
608 indicates to the C program that the memmove() routine is available
609 to copy potentatially overlapping blocks of memory.
611 d_memset (d_memset.U):
612 This variable conditionally defines the HAS_MEMSET symbol, which
613 indicates to the C program that the memset() routine is available
614 to set blocks of memory.
617 This variable conditionally defines the HAS_MKDIR symbol, which
618 indicates to the C program that the mkdir() routine is available
619 to create directories..
621 d_mkfifo (d_mkfifo.U):
622 This variable conditionally defines the HAS_MKFIFO symbol, which
623 indicates to the C program that the mkfifo() routine is available.
625 d_mktime (d_mktime.U):
626 This variable conditionally defines the HAS_MKTIME symbol, which
627 indicates to the C program that the mktime() routine is available.
630 This variable conditionally defines the HAS_MSG symbol, which
631 indicates that the entire msg*(2) library is present.
633 d_msgctl (d_msgctl.U):
634 This variable conditionally defines the HAS_MSGCTL symbol, which
635 indicates to the C program that the msgctl() routine is available.
637 d_msgget (d_msgget.U):
638 This variable conditionally defines the HAS_MSGGET symbol, which
639 indicates to the C program that the msgget() routine is available.
641 d_msgrcv (d_msgrcv.U):
642 This variable conditionally defines the HAS_MSGRCV symbol, which
643 indicates to the C program that the msgrcv() routine is available.
645 d_msgsnd (d_msgsnd.U):
646 This variable conditionally defines the HAS_MSGSND symbol, which
647 indicates to the C program that the msgsnd() routine is available.
649 d_mymalloc (mallocsrc.U):
650 This variable conditionally defines MYMALLOC in case other parts
651 of the source want to take special action if MYMALLOC is used.
652 This may include different sorts of profiling or error detection.
655 This variable conditionally defines the HAS_NICE symbol, which
656 indicates to the C program that the nice() routine is available.
658 d_oldpthreads (usethreads.U):
659 This variable conditionally defines the OLD_PTHREADS_API symbol,
660 and indicates that Perl should be built to use the old
661 draft POSIX threads API. This is only potneially meaningful if
664 d_oldsock (d_socket.U):
665 This variable conditionally defines the OLDSOCKET symbol, which
666 indicates that the BSD socket interface is based on 4.1c and not 4.2.
669 This variable conditionally defines the HAS_OPEN3 manifest constant,
670 which indicates to the C program that the 3 argument version of
671 the open(2) function is available.
673 d_pathconf (d_pathconf.U):
674 This variable conditionally defines the HAS_PATHCONF symbol, which
675 indicates to the C program that the pathconf() routine is available
676 to determine file-system related limits and options associated
677 with a given filename.
680 This variable conditionally defines the HAS_PAUSE symbol, which
681 indicates to the C program that the pause() routine is available
682 to suspend a process until a signal is received.
684 d_phostname (d_gethname.U):
685 This variable conditionally defines the PHOSTNAME symbol, which
686 contains the shell command which, when fed to popen(), may be
687 used to derive the host name.
690 This variable conditionally defines the HAS_PIPE symbol, which
691 indicates to the C program that the pipe() routine is available
692 to create an inter-process channel.
695 This variable conditionally defines the HAS_POLL symbol, which
696 indicates to the C program that the poll() routine is available
697 to poll active file descriptors.
699 d_portable (d_portable.U):
700 This variable conditionally defines the PORTABLE symbol, which
701 indicates to the C program that it should not assume that it is
702 running on the machine it was compiled on.
704 d_pthread_yield (d_pthread_y.U):
705 This variable conditionally defines the HAS_PTHREAD_YIELD
706 symbol if the pthread_yield routine is available to yield
707 the execution of the current thread.
709 d_pthreads_created_joinable (d_pthreadj.U):
710 This variable conditionally defines the PTHREADS_CREATED_JOINABLE
711 symbol if pthreads are created in the joinable (aka undetached)
715 This variable conditionally defines PWAGE, which indicates
716 that struct passwd contains pw_age.
718 d_pwchange (i_pwd.U):
719 This variable conditionally defines PWCHANGE, which indicates
720 that struct passwd contains pw_change.
723 This variable conditionally defines PWCLASS, which indicates
724 that struct passwd contains pw_class.
726 d_pwcomment (i_pwd.U):
727 This variable conditionally defines PWCOMMENT, which indicates
728 that struct passwd contains pw_comment.
730 d_pwexpire (i_pwd.U):
731 This variable conditionally defines PWEXPIRE, which indicates
732 that struct passwd contains pw_expire.
735 This variable conditionally defines PWGECOS, which indicates
736 that struct passwd contains pw_gecos.
739 This variable conditionally defines PWQUOTA, which indicates
740 that struct passwd contains pw_quota.
742 d_readdir (d_readdir.U):
743 This variable conditionally defines HAS_READDIR if readdir() is
744 available to read directory entries.
746 d_readlink (d_readlink.U):
747 This variable conditionally defines the HAS_READLINK symbol, which
748 indicates to the C program that the readlink() routine is available
749 to read the value of a symbolic link.
751 d_rename (d_rename.U):
752 This variable conditionally defines the HAS_RENAME symbol, which
753 indicates to the C program that the rename() routine is available
756 d_rewinddir (d_readdir.U):
757 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
761 This variable conditionally defines HAS_RMDIR if rmdir() is
762 available to remove directories.
764 d_safebcpy (d_safebcpy.U):
765 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
766 the bcopy() routine can do overlapping copies.
768 d_safemcpy (d_safemcpy.U):
769 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
770 the memcpy() routine can do overlapping copies.
772 d_sanemcmp (d_sanemcmp.U):
773 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
774 the memcpy() routine is available and can be used to compare relative
775 magnitudes of chars with their high bits set.
777 d_sched_yield (d_pthread_y.U):
778 This variable conditionally defines the HAS_SCHED_YIELD
779 symbol if the sched_yield routine is available to yield
780 the execution of the current thread.
782 d_seekdir (d_readdir.U):
783 This variable conditionally defines HAS_SEEKDIR if seekdir() is
786 d_select (d_select.U):
787 This variable conditionally defines HAS_SELECT if select() is
788 available to select active file descriptors. A <sys/time.h>
789 inclusion may be necessary for the timeout field.
792 This variable conditionally defines the HAS_SEM symbol, which
793 indicates that the entire sem*(2) library is present.
795 d_semctl (d_semctl.U):
796 This variable conditionally defines the HAS_SEMCTL symbol, which
797 indicates to the C program that the semctl() routine is available.
799 d_semctl_semid_ds (d_union_senum.U):
800 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
801 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
803 d_semctl_semun (d_union_senum.U):
804 This variable conditionally defines USE_SEMCTL_SEMUN, which
805 indicates that union semun is to be used for semctl IPC_STAT.
807 d_semget (d_semget.U):
808 This variable conditionally defines the HAS_SEMGET symbol, which
809 indicates to the C program that the semget() routine is available.
812 This variable conditionally defines the HAS_SEMOP symbol, which
813 indicates to the C program that the semop() routine is available.
815 d_setegid (d_setegid.U):
816 This variable conditionally defines the HAS_SETEGID symbol, which
817 indicates to the C program that the setegid() routine is available
818 to change the effective gid of the current program.
820 d_seteuid (d_seteuid.U):
821 This variable conditionally defines the HAS_SETEUID symbol, which
822 indicates to the C program that the seteuid() routine is available
823 to change the effective uid of the current program.
825 d_setgrps (d_setgrps.U):
826 This variable conditionally defines the HAS_SETGROUPS symbol, which
827 indicates to the C program that the setgroups() routine is available
828 to set the list of process groups.
830 d_sethent (d_sethent.U):
831 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
834 d_setlinebuf (d_setlnbuf.U):
835 This variable conditionally defines the HAS_SETLINEBUF symbol, which
836 indicates to the C program that the setlinebuf() routine is available
837 to change stderr or stdout from block-buffered or unbuffered to a
840 d_setlocale (d_setlocale.U):
841 This variable conditionally defines HAS_SETLOCALE if setlocale() is
842 available to handle locale-specific ctype implementations.
844 d_setnent (d_setnent.U):
845 This variable conditionally defines HAS_SETNETENT if setnetent() is
848 d_setpent (d_setpent.U):
849 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
852 d_setpgid (d_setpgid.U):
853 This variable conditionally defines the HAS_SETPGID symbol if the
854 setpgid(pid, gpid) function is available to set process group ID.
856 d_setpgrp2 (d_setpgrp2.U):
857 This variable conditionally defines the HAS_SETPGRP2 symbol, which
858 indicates to the C program that the setpgrp2() (as in DG/UX) routine
859 is available to set the current process group.
861 d_setpgrp (d_setpgrp.U):
862 This variable conditionally defines HAS_SETPGRP if setpgrp() is
863 available to set the current process group.
865 d_setprior (d_setprior.U):
866 This variable conditionally defines HAS_SETPRIORITY if setpriority()
867 is available to set a process's priority.
869 d_setregid (d_setregid.U):
870 This variable conditionally defines HAS_SETREGID if setregid() is
871 available to change the real and effective gid of the current
874 d_setresgid (d_setregid.U):
875 This variable conditionally defines HAS_SETRESGID if setresgid() is
876 available to change the real, effective and saved gid of the current
879 d_setresuid (d_setreuid.U):
880 This variable conditionally defines HAS_SETREUID if setresuid() is
881 available to change the real, effective and saved uid of the current
884 d_setreuid (d_setreuid.U):
885 This variable conditionally defines HAS_SETREUID if setreuid() is
886 available to change the real and effective uid of the current
889 d_setrgid (d_setrgid.U):
890 This variable conditionally defines the HAS_SETRGID symbol, which
891 indicates to the C program that the setrgid() routine is available
892 to change the real gid of the current program.
894 d_setruid (d_setruid.U):
895 This variable conditionally defines the HAS_SETRUID symbol, which
896 indicates to the C program that the setruid() routine is available
897 to change the real uid of the current program.
899 d_setsent (d_setsent.U):
900 This variable conditionally defines HAS_SETSERVENT if setservent() is
903 d_setsid (d_setsid.U):
904 This variable conditionally defines HAS_SETSID if setsid() is
905 available to set the process group ID.
907 d_setvbuf (d_setvbuf.U):
908 This variable conditionally defines the HAS_SETVBUF symbol, which
909 indicates to the C program that the setvbuf() routine is available
910 to change buffering on an open stdio stream.
913 This variable conditionally defines the USE_SFIO symbol,
914 and indicates whether sfio is available (and should be used).
917 This variable conditionally defines the HAS_SHM symbol, which
918 indicates that the entire shm*(2) library is present.
921 This variable conditionally defines the HAS_SHMAT symbol, which
922 indicates to the C program that the shmat() routine is available.
924 d_shmatprototype (d_shmat.U):
925 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
926 symbol, which indicates that sys/shm.h has a prototype for
929 d_shmctl (d_shmctl.U):
930 This variable conditionally defines the HAS_SHMCTL symbol, which
931 indicates to the C program that the shmctl() routine is available.
934 This variable conditionally defines the HAS_SHMDT symbol, which
935 indicates to the C program that the shmdt() routine is available.
937 d_shmget (d_shmget.U):
938 This variable conditionally defines the HAS_SHMGET symbol, which
939 indicates to the C program that the shmget() routine is available.
941 d_sigaction (d_sigaction.U):
942 This variable conditionally defines the HAS_SIGACTION symbol, which
943 indicates that the Vr4 sigaction() routine is available.
945 d_sigsetjmp (d_sigsetjmp.U):
946 This variable conditionally defines the HAS_SIGSETJMP symbol,
947 which indicates that the sigsetjmp() routine is available to
948 call setjmp() and optionally save the process's signal mask.
950 d_socket (d_socket.U):
951 This variable conditionally defines HAS_SOCKET, which indicates
952 that the BSD socket interface is supported.
954 d_sockpair (d_socket.U):
955 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
956 indicates that the BSD socketpair() is supported.
958 d_statblks (d_statblks.U):
959 This variable conditionally defines USE_STAT_BLOCKS if this system
960 has a stat structure declaring st_blksize and st_blocks.
962 d_stdio_cnt_lval (d_stdstdio.U):
963 This variable conditionally defines STDIO_CNT_LVALUE if the
964 FILE_cnt macro can be used as an lvalue.
966 d_stdio_ptr_lval (d_stdstdio.U):
967 This variable conditionally defines STDIO_PTR_LVALUE if the
968 FILE_ptr macro can be used as an lvalue.
970 d_stdiobase (d_stdstdio.U):
971 This variable conditionally defines USE_STDIO_BASE if this system
972 has a FILE structure declaring a usable _base field (or equivalent)
975 d_stdstdio (d_stdstdio.U):
976 This variable conditionally defines USE_STDIO_PTR if this system
977 has a FILE structure declaring usable _ptr and _cnt fields (or
978 equivalent) in stdio.h.
980 d_strchr (d_strchr.U):
981 This variable conditionally defines HAS_STRCHR if strchr() and
982 strrchr() are available for string searching.
984 d_strcoll (d_strcoll.U):
985 This variable conditionally defines HAS_STRCOLL if strcoll() is
986 available to compare strings using collating information.
988 d_strctcpy (d_strctcpy.U):
989 This variable conditionally defines the USE_STRUCT_COPY symbol, which
990 indicates to the C program that this C compiler knows how to copy
993 d_strerrm (d_strerror.U):
994 This variable holds what Strerrr is defined as to translate an error
995 code condition into an error message string. It could be 'strerror'
996 or a more complex macro emulating strrror with sys_errlist[], or the
997 "unknown" string when both strerror and sys_errlist are missing.
999 d_strerror (d_strerror.U):
1000 This variable conditionally defines HAS_STRERROR if strerror() is
1001 available to translate error numbers to strings.
1003 d_strtod (d_strtod.U):
1004 This variable conditionally defines the HAS_STRTOD symbol, which
1005 indicates to the C program that the strtod() routine is available
1006 to provide better numeric string conversion than atof().
1008 d_strtol (d_strtol.U):
1009 This variable conditionally defines the HAS_STRTOL symbol, which
1010 indicates to the C program that the strtol() routine is available
1011 to provide better numeric string conversion than atoi() and friends.
1013 d_strtoul (d_strtoul.U):
1014 This variable conditionally defines the HAS_STRTOUL symbol, which
1015 indicates to the C program that the strtoul() routine is available
1016 to provide conversion of strings to unsigned long.
1018 d_strxfrm (d_strxfrm.U):
1019 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1020 available to transform strings.
1022 d_suidsafe (d_dosuid.U):
1023 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1024 if setuid scripts can be secure. This test looks in /dev/fd/.
1026 d_symlink (d_symlink.U):
1027 This variable conditionally defines the HAS_SYMLINK symbol, which
1028 indicates to the C program that the symlink() routine is available
1029 to create symbolic links.
1031 d_syscall (d_syscall.U):
1032 This variable conditionally defines HAS_SYSCALL if syscall() is
1033 available call arbitrary system calls.
1035 d_sysconf (d_sysconf.U):
1036 This variable conditionally defines the HAS_SYSCONF symbol, which
1037 indicates to the C program that the sysconf() routine is available
1038 to determine system related limits and options.
1040 d_sysernlst (d_strerror.U):
1041 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1042 is available to translate error numbers to the symbolic name.
1044 d_syserrlst (d_strerror.U):
1045 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1046 available to translate error numbers to strings.
1048 d_system (d_system.U):
1049 This variable conditionally defines HAS_SYSTEM if system() is
1050 available to issue a shell command.
1052 d_tcgetpgrp (d_tcgtpgrp.U):
1053 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1054 indicates to the C program that the tcgetpgrp() routine is available.
1055 to get foreground process group ID.
1057 d_tcsetpgrp (d_tcstpgrp.U):
1058 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1059 indicates to the C program that the tcsetpgrp() routine is available
1060 to set foreground process group ID.
1062 d_telldir (d_readdir.U):
1063 This variable conditionally defines HAS_TELLDIR if telldir() is
1067 This variable conditionally defines the HAS_TIME symbol, which indicates
1068 that the time() routine exists. The time() routine is normaly
1069 provided on UNIX systems.
1071 d_times (d_times.U):
1072 This variable conditionally defines the HAS_TIMES symbol, which indicates
1073 that the times() routine exists. The times() routine is normaly
1074 provided on UNIX systems. You may have to include <sys/times.h>.
1076 d_truncate (d_truncate.U):
1077 This variable conditionally defines HAS_TRUNCATE if truncate() is
1078 available to truncate files.
1080 d_tzname (d_tzname.U):
1081 This variable conditionally defines HAS_TZNAME if tzname[] is
1082 available to access timezone names.
1084 d_umask (d_umask.U):
1085 This variable conditionally defines the HAS_UMASK symbol, which
1086 indicates to the C program that the umask() routine is available.
1087 to set and get the value of the file creation mask.
1089 d_uname (d_gethname.U):
1090 This variable conditionally defines the HAS_UNAME symbol, which
1091 indicates to the C program that the uname() routine may be
1092 used to derive the host name.
1094 d_union_semun (d_union_senum.U):
1095 This variable conditionally defines HAS_UNION_SEMUN if the
1096 union semun is defined by including <sys/sem.h>.
1098 d_vfork (d_vfork.U):
1099 This variable conditionally defines the HAS_VFORK symbol, which
1100 indicates the vfork() routine is available.
1102 d_void_closedir (d_closedir.U):
1103 This variable conditionally defines VOID_CLOSEDIR if closedir()
1104 does not return a value.
1106 d_voidsig (d_voidsig.U):
1107 This variable conditionally defines VOIDSIG if this system
1108 declares "void (*signal(...))()" in signal.h. The old way was to
1109 declare it as "int (*signal(...))()".
1111 d_voidtty (i_sysioctl.U):
1112 This variable conditionally defines USE_IOCNOTTY to indicate that the
1113 ioctl() call with TIOCNOTTY should be used to void tty association.
1114 Otherwise (on USG probably), it is enough to close the standard file
1115 decriptors and do a setpgrp().
1117 d_volatile (d_volatile.U):
1118 This variable conditionally defines the HASVOLATILE symbol, which
1119 indicates to the C program that this C compiler knows about the
1120 volatile declaration.
1122 d_vprintf (d_vprintf.U):
1123 This variable conditionally defines the HAS_VPRINTF symbol, which
1124 indicates to the C program that the vprintf() routine is available
1125 to printf with a pointer to an argument list.
1127 d_wait4 (d_wait4.U):
1128 This variable conditionally defines the HAS_WAIT4 symbol, which
1129 indicates the wait4() routine is available.
1131 d_waitpid (d_waitpid.U):
1132 This variable conditionally defines HAS_WAITPID if waitpid() is
1133 available to wait for child process.
1135 d_wcstombs (d_wcstombs.U):
1136 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1137 indicates to the C program that the wcstombs() routine is available
1138 to convert wide character strings to multibyte strings.
1140 d_wctomb (d_wctomb.U):
1141 This variable conditionally defines the HAS_WCTOMB symbol, which
1142 indicates to the C program that the wctomb() routine is available
1143 to convert a wide character to a multibyte.
1146 This variable conditionally defines the symbol XENIX, which alerts
1147 the C program that it runs under Xenix.
1149 db_hashtype (i_db.U):
1150 This variable contains the type of the hash structure element
1151 in the <db.h> header file. In older versions of DB, it was
1152 int, while in newer ones it is u_int32_t.
1154 db_prefixtype (i_db.U):
1155 This variable contains the type of the prefix structure element
1156 in the <db.h> header file. In older versions of DB, it was
1157 int, while in newer ones it is size_t.
1159 direntrytype (i_dirent.U):
1160 This symbol is set to 'struct direct' or 'struct dirent' depending on
1161 whether dirent is available or not. You should use this pseudo type to
1162 portably declare your directory entries.
1165 This variable contains the extension that is to be used for the
1166 dynamically loaded modules that perl generaties.
1169 This variable contains the name of the dynamic loading file that
1170 will be used with the package.
1172 doublesize (doublesize.U):
1173 This variable contains the value of the DOUBLESIZE symbol, which
1174 indicates to the C program how many bytes there are in a double.
1176 dynamic_ext (Extensions.U):
1177 This variable holds a list of XS extension files we want to
1178 link dynamically into the package. It is used by Makefile.
1180 eagain (nblock_io.U):
1181 This variable bears the symbolic errno code set by read() when no
1182 data is present on the file and non-blocking I/O was enabled (otherwise,
1183 read() blocks naturally).
1186 When running under Eunice this variable contains a command which will
1187 convert a shell script to the proper form of text file for it to be
1188 executable by the shell. On other systems it is a no-op.
1191 This is an old synonym for _exe.
1193 extensions (Extensions.U):
1194 This variable holds a list of all extension files (both XS and
1195 non-xs linked into the package. It is propagated to Config.pm
1196 and is typically used to test whether a particular extesion
1199 firstmakefile (Unix.U):
1200 This variable defines the first file searched by make. On unix,
1201 it is makefile (then Makefile). On case-insensitive systems,
1202 it might be something else. This is only used to deal with
1203 convoluted make depend tricks.
1205 fpostype (fpostype.U):
1206 This variable defines Fpos_t to be something like fpost_t, long,
1207 uint, or whatever type is used to declare file positions in libc.
1209 freetype (mallocsrc.U):
1210 This variable contains the return type of free(). It is usually
1211 void, but occasionally int.
1214 This variable contains the full pathname to 'csh', whether or
1215 not the user has specified 'portability'. This is only used
1216 in the compiled C program, and we assume that all systems which
1217 can share this executable will have the same full pathname to
1220 full_sed (Loc_sed.U):
1221 This variable contains the full pathname to 'sed', whether or
1222 not the user has specified 'portability'. This is only used
1223 in the compiled C program, and we assume that all systems which
1224 can share this executable will have the same full pathname to
1228 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1229 indicate whether the compiler is version 1 or 2. This is used in
1230 setting some of the default cflags. It is set to '' if not gcc.
1232 gidtype (gidtype.U):
1233 This variable defines Gid_t to be something like gid_t, int,
1234 ushort, or whatever type is used to declare the return type
1235 of getgid(). Typically, it is the type of group ids in the kernel.
1238 This variable contains a command that produces the text of the
1239 /etc/group file. This is normally "cat /etc/group", but can be
1240 "ypcat group" when NIS is used.
1242 groupstype (groupstype.U):
1243 This variable defines Groups_t to be something like gid_t, int,
1244 ushort, or whatever type is used for the second argument to
1245 getgroups() and setgroups(). Usually, this is the same as
1246 gidtype (gid_t), but sometimes it isn't.
1248 h_fcntl (h_fcntl.U):
1249 This is variable gets set in various places to tell i_fcntl that
1250 <fcntl.h> should be included.
1252 h_sysfile (h_sysfile.U):
1253 This is variable gets set in various places to tell i_sys_file that
1254 <sys/file.h> should be included.
1257 Gives the type of hints used for previous answers. May be one of
1258 "default", "recommended" or "previous".
1261 This variable contains a command that produces the text of the
1262 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1263 "ypcat hosts" when NIS is used.
1266 This variable contains a flag which will tell the C compiler and loader
1267 to produce a program running with a huge memory model. If the
1268 huge model is not supported, contains the flag to produce large
1269 model programs. It is up to the Makefile to use this.
1271 i_bsdioctl (i_sysioctl.U):
1272 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1273 indicates to the C program that <sys/bsdioctl.h> exists and should
1277 This variable conditionally defines the I_DB symbol, and indicates
1278 whether a C program may include Berkeley's DB include file <db.h>.
1281 This variable conditionally defines the I_DBM symbol, which
1282 indicates to the C program that <dbm.h> exists and should
1285 i_dirent (i_dirent.U):
1286 This variable conditionally defines I_DIRENT, which indicates
1287 to the C program that it should include <dirent.h>.
1290 This variable conditionally defines the I_DLD symbol, which
1291 indicates to the C program that <dld.h> (GNU dynamic loading)
1292 exists and should be included.
1294 i_dlfcn (i_dlfcn.U):
1295 This variable conditionally defines the I_DLFCN symbol, which
1296 indicates to the C program that <dlfcn.h> exists and should
1299 i_fcntl (i_fcntl.U):
1300 This variable controls the value of I_FCNTL (which tells
1301 the C program to include <fcntl.h>).
1303 i_float (i_float.U):
1304 This variable conditionally defines the I_FLOAT symbol, and indicates
1305 whether a C program may include <float.h> to get symbols like DBL_MAX
1306 or DBL_MIN, i.e. machine dependent floating point values.
1309 This variable conditionally defines the I_GDBM symbol, which
1310 indicates to the C program that <gdbm.h> exists and should
1314 This variable conditionally defines the I_GRP symbol, and indicates
1315 whether a C program should include <grp.h>.
1317 i_limits (i_limits.U):
1318 This variable conditionally defines the I_LIMITS symbol, and indicates
1319 whether a C program may include <limits.h> to get symbols like WORD_BIT
1322 i_locale (i_locale.U):
1323 This variable conditionally defines the I_LOCALE symbol,
1324 and indicates whether a C program should include <locale.h>.
1326 i_malloc (i_malloc.U):
1327 This variable conditionally defines the I_MALLOC symbol, and indicates
1328 whether a C program should include <malloc.h>.
1331 This variable conditionally defines the I_MATH symbol, and indicates
1332 whether a C program may include <math.h>.
1334 i_memory (i_memory.U):
1335 This variable conditionally defines the I_MEMORY symbol, and indicates
1336 whether a C program should include <memory.h>.
1339 This variable conditionally defines the I_NDBM symbol, which
1340 indicates to the C program that <ndbm.h> exists and should
1343 i_netdb (i_netdb.U):
1344 This variable conditionally defines the I_NETDB symbol, and indicates
1345 whether a C program should include <netdb.h>.
1347 i_neterrno (i_neterrno.U):
1348 This variable conditionally defines the I_NET_ERRNO symbol, which
1349 indicates to the C program that <net/errno.h> exists and should
1353 This variable conditionally defines I_NETINET_IN, which indicates
1354 to the C program that it should include <netinet/in.h>. Otherwise,
1355 you may try <sys/in.h>.
1358 This variable conditionally defines I_PWD, which indicates
1359 to the C program that it should include <pwd.h>.
1361 i_rpcsvcdbm (i_dbm.U):
1362 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1363 indicates to the C program that <rpcsvc/dbm.h> exists and should
1364 be included. Some System V systems might need this instead of <dbm.h>.
1367 This variable conditionally defines the I_SFIO symbol,
1368 and indicates whether a C program should include <sfio.h>.
1370 i_sgtty (i_termio.U):
1371 This variable conditionally defines the I_SGTTY symbol, which
1372 indicates to the C program that it should include <sgtty.h> rather
1375 i_stdarg (i_varhdr.U):
1376 This variable conditionally defines the I_STDARG symbol, which
1377 indicates to the C program that <stdarg.h> exists and should
1380 i_stddef (i_stddef.U):
1381 This variable conditionally defines the I_STDDEF symbol, which
1382 indicates to the C program that <stddef.h> exists and should
1385 i_stdlib (i_stdlib.U):
1386 This variable conditionally defines the I_STDLIB symbol, which
1387 indicates to the C program that <stdlib.h> exists and should
1390 i_string (i_string.U):
1391 This variable conditionally defines the I_STRING symbol, which
1392 indicates that <string.h> should be included rather than <strings.h>.
1394 i_sysdir (i_sysdir.U):
1395 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1396 whether a C program should include <sys/dir.h>.
1398 i_sysfile (i_sysfile.U):
1399 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1400 whether a C program should include <sys/file.h> to get R_OK and friends.
1402 i_sysfilio (i_sysioctl.U):
1403 This variable conditionally defines the I_SYS_FILIO symbol, which
1404 indicates to the C program that <sys/filio.h> exists and should
1405 be included in preference to <sys/ioctl.h>.
1408 This variable conditionally defines I_SYS_IN, which indicates
1409 to the C program that it should include <sys/in.h> instead of
1412 i_sysioctl (i_sysioctl.U):
1413 This variable conditionally defines the I_SYS_IOCTL symbol, which
1414 indicates to the C program that <sys/ioctl.h> exists and should
1417 i_sysndir (i_sysndir.U):
1418 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1419 whether a C program should include <sys/ndir.h>.
1421 i_sysparam (i_sysparam.U):
1422 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1423 whether a C program should include <sys/param.h>.
1425 i_sysresrc (i_sysresrc.U):
1426 This variable conditionally defines the I_SYS_RESOURCE symbol,
1427 and indicates whether a C program should include <sys/resource.h>.
1429 i_sysselct (i_sysselct.U):
1430 This variable conditionally defines I_SYS_SELECT, which indicates
1431 to the C program that it should include <sys/select.h> in order to
1432 get the definition of struct timeval.
1434 i_syssockio (i_sysioctl.U):
1435 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1436 C program that socket ioctl codes may be found in <sys/sockio.h>
1437 instead of <sys/ioctl.h>.
1439 i_sysstat (i_sysstat.U):
1440 This variable conditionally defines the I_SYS_STAT symbol,
1441 and indicates whether a C program should include <sys/stat.h>.
1443 i_systime (i_time.U):
1444 This variable conditionally defines I_SYS_TIME, which indicates
1445 to the C program that it should include <sys/time.h>.
1447 i_systimek (i_time.U):
1448 This variable conditionally defines I_SYS_TIME_KERNEL, which
1449 indicates to the C program that it should include <sys/time.h>
1450 with KERNEL defined.
1452 i_systimes (i_systimes.U):
1453 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1454 whether a C program should include <sys/times.h>.
1456 i_systypes (i_systypes.U):
1457 This variable conditionally defines the I_SYS_TYPES symbol,
1458 and indicates whether a C program should include <sys/types.h>.
1460 i_sysun (i_sysun.U):
1461 This variable conditionally defines I_SYS_UN, which indicates
1462 to the C program that it should include <sys/un.h> to get UNIX
1463 domain socket definitions.
1465 i_syswait (i_syswait.U):
1466 This variable conditionally defines I_SYS_WAIT, which indicates
1467 to the C program that it should include <sys/wait.h>.
1469 i_termio (i_termio.U):
1470 This variable conditionally defines the I_TERMIO symbol, which
1471 indicates to the C program that it should include <termio.h> rather
1474 i_termios (i_termio.U):
1475 This variable conditionally defines the I_TERMIOS symbol, which
1476 indicates to the C program that the POSIX <termios.h> file is
1480 This variable conditionally defines I_TIME, which indicates
1481 to the C program that it should include <time.h>.
1483 i_unistd (i_unistd.U):
1484 This variable conditionally defines the I_UNISTD symbol, and indicates
1485 whether a C program should include <unistd.h>.
1487 i_utime (i_utime.U):
1488 This variable conditionally defines the I_UTIME symbol, and indicates
1489 whether a C program should include <utime.h>.
1491 i_values (i_values.U):
1492 This variable conditionally defines the I_VALUES symbol, and indicates
1493 whether a C program may include <values.h> to get symbols like MAXLONG
1496 i_varargs (i_varhdr.U):
1497 This variable conditionally defines I_VARARGS, which indicates
1498 to the C program that it should include <varargs.h>.
1500 i_varhdr (i_varhdr.U):
1501 Contains the name of the header to be included to get va_dcl definition.
1502 Typically one of varargs.h or stdarg.h.
1504 i_vfork (i_vfork.U):
1505 This variable conditionally defines the I_VFORK symbol, and indicates
1506 whether a C program should include vfork.h.
1509 This variable must preceed the normal include path to get hte
1510 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
1511 Value can be "" or "/bsd43" on mips.
1513 installarchlib (archlib.U):
1514 This variable is really the same as archlibexp but may differ on
1515 those systems using AFS. For extra portability, only this variable
1516 should be used in makefiles.
1519 This variable is the same as binexp unless AFS is running in which case
1520 the user is explicitely prompted for it. This variable should always
1521 be used in your makefiles for maximum portability.
1523 installman1dir (man1dir.U):
1524 This variable is really the same as man1direxp, unless you are using
1525 AFS in which case it points to the read/write location whereas
1526 man1direxp only points to the read-only access location. For extra
1527 portability, you should only use this variable within your makefiles.
1529 installman3dir (man3dir.U):
1530 This variable is really the same as man3direxp, unless you are using
1531 AFS in which case it points to the read/write location whereas
1532 man3direxp only points to the read-only access location. For extra
1533 portability, you should only use this variable within your makefiles.
1535 installprivlib (privlib.U):
1536 This variable is really the same as privlibexp but may differ on
1537 those systems using AFS. For extra portability, only this variable
1538 should be used in makefiles.
1540 installscript (scriptdir.U):
1541 This variable is usually the same as scriptdirexp, unless you are on
1542 a system running AFS, in which case they may differ slightly. You
1543 should always use this variable within your makefiles for portability.
1545 installsitearch (sitearch.U):
1546 This variable is really the same as sitearchexp but may differ on
1547 those systems using AFS. For extra portability, only this variable
1548 should be used in makefiles.
1550 installsitelib (sitelib.U):
1551 This variable is really the same as sitelibexp but may differ on
1552 those systems using AFS. For extra portability, only this variable
1553 should be used in makefiles.
1555 intsize (intsize.U):
1556 This variable contains the value of the INTSIZE symbol, which
1557 indicates to the C program how many bytes there are in an int.
1559 known_extensions (Extensions.U):
1560 This variable holds a list of all XS extensions included in
1564 This variable contains a flag which will tell the C compiler and loader
1565 to produce a program running with a large memory model. It is up to
1566 the Makefile to use this.
1569 This variable indicates the program to be used to link
1570 libraries for dynamic loading. On some systems, it is 'ld'.
1571 On ELF systems, it should be $cc. Mostly, we'll try to respect
1572 the hint file setting.
1574 lddlflags (dlsrc.U):
1575 This variable contains any special flags that might need to be
1576 passed to $ld to create a shared library suitable for dynamic
1577 loading. It is up to the makefile to use it. For hpux, it
1578 should be -b. For sunos 4.1, it is empty.
1580 ldflags (ccflags.U):
1581 This variable contains any additional C loader flags desired by
1582 the user. It is up to the Makefile to use this.
1585 This is an old synonym for _a.
1588 This variable contains the location of the C library.
1590 libperl (libperl.U):
1591 The perl executable is obtained by linking perlmain.c with
1592 libperl, any static extensions (usually just DynaLoader),
1593 and any other libraries needed on this system. libperl
1594 is usually libperl.a, but can also be libperl.so.xxx if
1595 the user wishes to build a perl executable with a shared
1599 This variable holds the general path used to find libraries. It is
1600 intended to be used by other units.
1603 This variable holds the additional libraries we want to use.
1604 It is up to the Makefile to deal with it.
1606 libswanted (Myinit.U):
1607 This variable holds a list of all the libraries we want to
1608 search. The order is chosen to pick up the c library
1609 ahead of ucb or bsd libraries for SVR4.
1611 lkflags (ccflags.U):
1612 This variable contains any additional C partial linker flags desired by
1613 the user. It is up to the Makefile to use this.
1616 This variable holds the name of the command to make
1617 symbolic links (if they are supported). It can be used
1618 in the Makefile. It is either 'ln -s' or 'ln'
1620 locincpth (ccflags.U):
1621 This variable contains a list of additional directories to be
1622 searched by the compiler. The appropriate -I directives will
1623 be added to ccflags. This is intended to simplify setting
1624 local directories from the Configure command line.
1625 It's not much, but it parallels the loclibpth stuff in libpth.U.
1627 loclibpth (libpth.U):
1628 This variable holds the paths used to find local libraries. It is
1629 prepended to libpth, and is intended to be easily set from the
1632 longdblsize (d_longdbl.U):
1633 This variable contains the value of the LONG_DOUBLESIZE symbol, which
1634 indicates to the C program how many bytes there are in a long double,
1635 if this system supports long doubles.
1637 longlongsize (d_longlong.U):
1638 This variable contains the value of the LONGLONGSIZE symbol, which
1639 indicates to the C program how many bytes there are in a long long,
1640 if this system supports long long.
1642 longsize (intsize.U):
1643 This variable contains the value of the LONGSIZE symbol, which
1644 indicates to the C program how many bytes there are in a long.
1646 lseektype (lseektype.U):
1647 This variable defines lseektype to be something like off_t, long,
1648 or whatever type is used to declare lseek offset's type in the
1649 kernel (which also appears to be lseek's return type).
1651 make_set_make (make.U):
1652 Some versions of 'make' set the variable MAKE. Others do not.
1653 This variable contains the string to be included in Makefile.SH
1654 so that MAKE is set if needed, and not if not needed.
1655 Possible values are:
1656 make_set_make='#' # If your make program handles this for you,
1657 make_set_make="MAKE=$make" # if it doesn't.
1658 I used a comment character so that we can distinguish a
1659 'set' value (from a previous config.sh or Configure -D option)
1660 from an uncomputed value.
1662 mallocobj (mallocsrc.U):
1663 This variable contains the name of the malloc.o that this package
1664 generates, if that malloc.o is preferred over the system malloc.
1665 Otherwise the value is null. This variable is intended for generating
1666 Makefiles. See mallocsrc.
1668 mallocsrc (mallocsrc.U):
1669 This variable contains the name of the malloc.c that comes with
1670 the package, if that malloc.c is preferred over the system malloc.
1671 Otherwise the value is null. This variable is intended for generating
1674 malloctype (mallocsrc.U):
1675 This variable contains the kind of ptr returned by malloc and realloc.
1677 man1dir (man1dir.U):
1678 This variable contains the name of the directory in which manual
1679 source pages are to be put. It is the responsibility of the
1680 Makefile.SH to get the value of this into the proper command.
1681 You must be prepared to do the ~name expansion yourself.
1683 man1direxp (man1dir.U):
1684 This variable is the same as the man1dir variable, but is filename
1685 expanded at configuration time, for convenient use in makefiles.
1687 man1ext (man1dir.U):
1688 This variable contains the extension that the manual page should
1689 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
1692 man3dir (man3dir.U):
1693 This variable contains the name of the directory in which manual
1694 source pages are to be put. It is the responsibility of the
1695 Makefile.SH to get the value of this into the proper command.
1696 You must be prepared to do the ~name expansion yourself.
1698 man3direxp (man3dir.U):
1699 This variable is the same as the man3dir variable, but is filename
1700 expanded at configuration time, for convenient use in makefiles.
1702 man3ext (man3dir.U):
1703 This variable contains the extension that the manual page should
1704 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
1708 This variable contains a flag which will tell the C compiler and loader
1709 to produce a program running with a medium memory model. If the
1710 medium model is not supported, contains the flag to produce large
1711 model programs. It is up to the Makefile to use this.
1713 mips_type (usrinc.U):
1714 This variable holds the environment type for the mips system.
1715 Possible values are "BSD 4.3" and "System V".
1718 This variable contains the list of memory models supported by this
1719 system. Possible component values are none, split, unsplit, small,
1720 medium, large, and huge. The component values are space separated.
1722 modetype (modetype.U):
1723 This variable defines modetype to be something like mode_t,
1724 int, unsigned short, or whatever type is used to declare file
1725 modes for system calls.
1727 myarchname (archname.U):
1728 This variable holds the architecture name computed by Configure in
1729 a previous run. It is not intended to be perused by any user and
1730 should never be set in a hint file.
1732 mydomain (myhostname.U):
1733 This variable contains the eventual value of the MYDOMAIN symbol,
1734 which is the domain of the host the program is going to run on.
1735 The domain must be appended to myhostname to form a complete host name.
1736 The dot comes with mydomain, and need not be supplied by the program.
1738 myhostname (myhostname.U):
1739 This variable contains the eventual value of the MYHOSTNAME symbol,
1740 which is the name of the host the program is going to run on.
1741 The domain is not kept with hostname, but must be gotten from mydomain.
1742 The dot comes with mydomain, and need not be supplied by the program.
1744 myuname (Oldconfig.U):
1745 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
1746 pseudo variables assignments in the output are stripped, thank you. The
1747 whole thing is then lower-cased.
1750 This variable contains the -n flag if that is what causes the echo
1751 command to suppress newline. Otherwise it is null. Correct usage is
1752 $echo $n "prompt for a question: $c".
1754 netdb_hlen_type (netdbtype.U):
1755 This variable holds the type used for the 2nd argument to
1756 gethostbyaddr(). Usually, this is int or size_t or unsigned.
1757 This is only useful if you have gethostbyaddr(), naturally.
1759 netdb_host_type (netdbtype.U):
1760 This variable holds the type used for the 1st argument to
1761 gethostbyaddr(). Usually, this is char * or void *, possibly
1762 with or without a const prefix.
1763 This is only useful if you have gethostbyaddr(), naturally.
1765 netdb_name_type (netdbtype.U):
1766 This variable holds the type used for the argument to
1767 gethostbyname(). Usually, this is char * or const char *.
1768 This is only useful if you have gethostbyname(), naturally.
1770 netdb_net_type (netdbtype.U):
1771 This variable holds the type used for the 1st argument to
1772 getnetbyaddr(). Usually, this is int or long.
1773 This is only useful if you have getnetbyaddr(), naturally.
1776 This variable holds the options that may be necessary for nm.
1778 nm_so_opt (usenm.U):
1779 This variable holds the options that may be necessary for nm
1780 to work on a shared library but that can not be used on an
1781 archive library. Currently, this is only used by Linux, where
1782 nm --dynamic is *required* to get symbols from an ELF library which
1783 has been stripped, but nm --dynamic is *fatal* on an archive library.
1784 Maybe Linux should just always set usenm=false.
1786 nonxs_ext (Extensions.U):
1787 This variable holds a list of all non-xs extensions included
1788 in the package. All of them will be built.
1790 o_nonblock (nblock_io.U):
1791 This variable bears the symbol value to be used during open() or fcntl()
1792 to turn on non-blocking I/O for a file descriptor. If you wish to switch
1793 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
1794 but that is only supported by some devices.
1797 This is an old synonym for _o.
1799 optimize (ccflags.U):
1800 This variable contains any optimizer/debugger flag that should be used.
1801 It is up to the Makefile to use it.
1803 orderlib (orderlib.U):
1804 This variable is "true" if the components of libraries must be ordered
1805 (with `lorder $* | tsort`) before placing them in an archive. Set to
1806 "false" if ranlib or ar can generate random libraries.
1808 osname (Oldconfig.U):
1809 This variable contains the operating system name (e.g. sunos,
1810 solaris, hpux, etc.). It can be useful later on for setting
1811 defaults. Any spaces are replaced with underscores. It is set
1812 to a null string if we can't figure it out.
1814 osvers (Oldconfig.U):
1815 This variable contains the operating system version (e.g.
1816 4.1.3, 5.2, etc.). It is primarily used for helping select
1817 an appropriate hints file, but might be useful elsewhere for
1818 setting defaults. It is set to '' if we can't figure it out.
1819 We try to be flexible about how much of the version number
1820 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
1821 same for this package, hints files might just be os_4.0 or
1822 os_4.1, etc., not keeping separate files for each little release.
1824 package (package.U):
1825 This variable contains the name of the package being constructed.
1826 It is primarily intended for the use of later Configure units.
1829 This variable contains the name of the preferred pager on the system.
1830 Usual values are (the full pathnames of) more, less, pg, or cat.
1833 This variable contains a command that produces the text of the
1834 /etc/passwd file. This is normally "cat /etc/passwd", but can be
1835 "ypcat passwd" when NIS is used.
1837 patchlevel (patchlevel.U):
1838 The patchlevel level of this package.
1839 The value of patchlevel comes from the patchlevel.h file.
1842 This is an old synonym for p_ in Head.U, the character
1843 used to separate elements in the command shell search PATH.
1845 perladmin (perladmin.U):
1846 Electronic mail address of the perl5 administrator.
1848 perlpath (perlpath.U):
1849 This variable contains the eventual value of the PERLPATH symbol,
1850 which contains the name of the perl interpreter to be used in
1851 shell scripts and in the "eval 'exec'" idiom.
1853 phostname (myhostname.U):
1854 This variable contains the eventual value of the PHOSTNAME symbol,
1855 which is a command that can be fed to popen() to get the host name.
1856 The program should probably not presume that the domain is or isn't
1859 pidtype (pidtype.U):
1860 This variable defines PIDTYPE to be something like pid_t, int,
1861 ushort, or whatever type is used to declare process ids in the kernel.
1864 Holds the private path used by Configure to find out the libraries.
1865 Its value is prepend to libpth. This variable takes care of special
1866 machines, like the mips. Usually, it should be empty.
1869 This variable holds the name of the directory below which the
1870 user will install the package. Usually, this is /usr/local, and
1871 executables go in /usr/local/bin, library stuff in /usr/local/lib,
1872 man pages in /usr/local/man, etc. It is only used to set defaults
1873 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
1875 prefixexp (prefix.U):
1876 This variable holds the full absolute path of the directory below
1877 which the user will install the package. Derived from prefix.
1879 privlib (privlib.U):
1880 This variable contains the eventual value of the PRIVLIB symbol,
1881 which is the name of the private library for this package. It may
1882 have a ~ on the front. It is up to the makefile to eventually create
1883 this directory while performing installation (with ~ substitution).
1885 privlibexp (privlib.U):
1886 This variable is the ~name expanded version of privlib, so that you
1887 may use it directly in Makefiles or shell scripts.
1889 prototype (prototype.U):
1890 This variable holds the eventual value of CAN_PROTOTYPE, which
1891 indicates the C compiler can handle funciton prototypes.
1893 ptrsize (ptrsize.U):
1894 This variable contains the value of the PTRSIZE symbol, which
1895 indicates to the C program how many bytes there are in a pointer.
1897 randbits (randbits.U):
1898 This variable contains the eventual value of the RANDBITS symbol,
1899 which indicates to the C program how many bits of random number
1900 the rand() function produces.
1902 ranlib (orderlib.U):
1903 This variable is set to the pathname of the ranlib program, if it is
1904 needed to generate random libraries. Set to ":" if ar can generate
1905 random libraries or if random libraries are not supported
1907 rd_nodata (nblock_io.U):
1908 This variable holds the return code from read() when no data is
1909 present. It should be -1, but some systems return 0 when O_NDELAY is
1910 used, which is a shame because you cannot make the difference between
1911 no data and an EOF.. Sigh!
1914 This variable contains 'true' or 'false' depending whether the
1915 nm extraction should be performed or not, according to the value
1916 of usenm and the flags on the Configure command line.
1918 scriptdir (scriptdir.U):
1919 This variable holds the name of the directory in which the user wants
1920 to put publicly scripts for the package in question. It is either
1921 the same directory as for binaries, or a special one that can be
1922 mounted across different architectures, like /usr/share. Programs
1923 must be prepared to deal with ~name expansion.
1925 scriptdirexp (scriptdir.U):
1926 This variable is the same as scriptdir, but is filename expanded
1927 at configuration time, for programs not wanting to bother with it.
1929 selecttype (selecttype.U):
1930 This variable holds the type used for the 2nd, 3rd, and 4th
1931 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
1932 is defined, and 'int *' otherwise. This is only useful if you
1933 have select(), naturally.
1936 This variable contains the full pathname of the shell used
1937 on this system to execute Bourne shell scripts. Usually, this will be
1938 /bin/sh, though it's possible that some systems will have /bin/ksh,
1939 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
1941 This unit comes before Options.U, so you can't set sh with a -D
1942 option, though you can override this (and startsh)
1943 with -O -Dsh=/bin/whatever -Dstartsh=whatever
1945 sharpbang (spitshell.U):
1946 This variable contains the string #! if this system supports that
1949 shmattype (d_shmat.U):
1950 This symbol contains the type of pointer returned by shmat().
1951 It can be 'void *' or 'char *'.
1953 shortsize (intsize.U):
1954 This variable contains the value of the SHORTSIZE symbol which
1955 indicates to the C program how many bytes there are in a short.
1957 shrpenv (libperl.U):
1958 If the user builds a shared libperl.so, then we need to tell the
1959 'perl' executable where it will be able to find the installed libperl.so.
1960 One way to do this on some systems is to set the environment variable
1961 LD_RUN_PATH to the directory that will be the final location of the
1962 shared libperl.so. The makefile can use this with something like
1963 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
1965 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
1968 See the main perl Makefile.SH for actual working usage.
1969 Alternatively, we might be able to use a command line option such
1970 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
1971 $archlibexp/CORE (Linux).
1973 shsharp (spitshell.U):
1974 This variable tells further Configure units whether your sh can
1977 sig_name (sig_name.U):
1978 This variable holds the signal names, space separated. The leading
1979 SIG in signal name is removed. A ZERO is prepended to the
1980 list. This is currently not used.
1982 sig_name_init (sig_name.U):
1983 This variable holds the signal names, enclosed in double quotes and
1984 separated by commas, suitable for use in the SIG_NAME definition
1985 below. A "ZERO" is prepended to the list, and the list is
1986 terminated with a plain 0. The leading SIG in signal names
1987 is removed. See sig_num.
1989 sig_num (sig_name.U):
1990 This variable holds the signal numbers, comma separated. A 0 is
1991 prepended to the list (corresponding to the fake SIGZERO), and
1992 the list is terminated with a 0. Those numbers correspond to
1993 the value of the signal listed in the same place within the
1996 signal_t (d_voidsig.U):
1997 This variable holds the type of the signal handler (void or int).
1999 sitearch (sitearch.U):
2000 This variable contains the eventual value of the SITEARCH symbol,
2001 which is the name of the private library for this package. It may
2002 have a ~ on the front. It is up to the makefile to eventually create
2003 this directory while performing installation (with ~ substitution).
2005 sitearchexp (sitearch.U):
2006 This variable is the ~name expanded version of sitearch, so that you
2007 may use it directly in Makefiles or shell scripts.
2009 sitelib (sitelib.U):
2010 This variable contains the eventual value of the SITELIB symbol,
2011 which is the name of the private library for this package. It may
2012 have a ~ on the front. It is up to the makefile to eventually create
2013 this directory while performing installation (with ~ substitution).
2015 sitelibexp (sitelib.U):
2016 This variable is the ~name expanded version of sitelib, so that you
2017 may use it directly in Makefiles or shell scripts.
2019 sizetype (sizetype.U):
2020 This variable defines sizetype to be something like size_t,
2021 unsigned long, or whatever type is used to declare length
2022 parameters for string functions.
2025 This variable contains a flag which will tell the C compiler and loader
2026 to produce a program running with a small memory model. It is up to
2027 the Makefile to use this.
2030 This variable holds the extension used to identify shared libraries
2031 (also known as shared objects) on the system. Usually set to 'so'.
2033 sockethdr (d_socket.U):
2034 This variable has any cpp -I flags needed for socket support.
2036 socketlib (d_socket.U):
2037 This variable has the names of any libraries needed for socket support.
2039 spackage (package.U):
2040 This variable contains the name of the package being constructed,
2041 with the first letter uppercased, i.e. suitable for starting
2044 spitshell (spitshell.U):
2045 This variable contains the command necessary to spit out a runnable
2046 shell on this system. It is either cat or a grep -v for # comments.
2049 This variable contains a flag which will tell the C compiler and loader
2050 to produce a program that will run in separate I and D space, for those
2051 machines that support separation of instruction and data space. It is
2052 up to the Makefile to use this.
2055 This variable holds the path to the package source. It is up to
2056 the Makefile to use this variable and set VPATH accordingly to
2057 find the sources remotely.
2059 ssizetype (ssizetype.U):
2060 This variable defines ssizetype to be something like ssize_t,
2061 long or int. It is used by functions that return a count
2062 of bytes or an error condition. It must be a signed type.
2063 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2065 startperl (startperl.U):
2066 This variable contains the string to put on the front of a perl
2067 script to make sure (hopefully) that it runs with perl and not some
2068 shell. Of course, that leading line must be followed by the classical
2070 eval 'exec perl -S $0 ${1+"$@"}'
2071 if $running_under_some_shell;
2072 to guarantee perl startup should the shell execute the script. Note
2073 that this magic incatation is not understood by csh.
2075 startsh (startsh.U):
2076 This variable contains the string to put on the front of a shell
2077 script to make sure (hopefully) that it runs with sh and not some
2080 static_ext (Extensions.U):
2081 This variable holds a list of XS extension files we want to
2082 link statically into the package. It is used by Makefile.
2084 stdchar (stdchar.U):
2085 This variable conditionally defines STDCHAR to be the type of char
2086 used in stdio.h. It has the values "unsigned char" or "char".
2088 stdio_base (d_stdstdio.U):
2089 This variable defines how, given a FILE pointer, fp, to access the
2090 _base field (or equivalent) of stdio.h's FILE structure. This will
2091 be used to define the macro FILE_base(fp).
2093 stdio_bufsiz (d_stdstdio.U):
2094 This variable defines how, given a FILE pointer, fp, to determine
2095 the number of bytes store in the I/O buffer pointer to by the
2096 _base field (or equivalent) of stdio.h's FILE structure. This will
2097 be used to define the macro FILE_bufsiz(fp).
2099 stdio_cnt (d_stdstdio.U):
2100 This variable defines how, given a FILE pointer, fp, to access the
2101 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2102 be used to define the macro FILE_cnt(fp).
2104 stdio_filbuf (d_stdstdio.U):
2105 This variable defines how, given a FILE pointer, fp, to tell
2106 stdio to refill it's internal buffers (?). This will
2107 be used to define the macro FILE_filbuf(fp).
2109 stdio_ptr (d_stdstdio.U):
2110 This variable defines how, given a FILE pointer, fp, to access the
2111 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2112 be used to define the macro FILE_ptr(fp).
2114 strings (i_string.U):
2115 This variable holds the full path of the string header that will be
2116 used. Typically /usr/include/string.h or /usr/include/strings.h.
2118 subversion (patchlevel.U):
2119 The subversion level of this package.
2120 The value of subversion comes from the patchlevel.h file.
2121 This is unique to perl.
2124 This variable holds the place where the manual is located on this
2125 system. It is not the place where the user wants to put his manual
2126 pages. Rather it is the place where Configure may look to find manual
2127 for unix commands (section 1 of the manual usually). See mansrc.
2129 timeincl (i_time.U):
2130 This variable holds the full path of the included time header(s).
2132 timetype (d_time.U):
2133 This variable holds the type returned by time(). It can be long,
2134 or time_t on BSD sites (in which case <sys/types.h> should be
2135 included). Anyway, the type Time_t should be used.
2137 uidtype (uidtype.U):
2138 This variable defines Uid_t to be something like uid_t, int,
2139 ushort, or whatever type is used to declare user ids in the kernel.
2142 This variable indicates if the the system supports dynamic
2143 loading of some sort. See also dlsrc and dlobj.
2145 usemymalloc (mallocsrc.U):
2146 This variable contains y if the malloc that comes with this package
2147 is desired over the system's version of malloc. People often include
2148 special versions of malloc for effiency, but such versions are often
2149 less portable. See also mallocsrc and mallocobj.
2150 If this is 'y', then -lmalloc is removed from $libs.
2153 This variable contains 'true' or 'false' depending whether the
2154 nm extraction is wanted or not.
2156 useopcode (Extensions.U):
2157 This variable holds either 'true' or 'false' to indicate
2158 whether the Opcode extension should be used. The sole
2159 use for this currently is to allow an easy mechanism
2160 for users to skip the Opcode extension from the Configure
2163 useperlio (useperlio.U):
2164 This variable conditionally defines the USE_PERLIO symbol,
2165 and indicates that the PerlIO abstraction should be
2168 useposix (Extensions.U):
2169 This variable holds either 'true' or 'false' to indicate
2170 whether the POSIX extension should be used. The sole
2171 use for this currently is to allow an easy mechanism
2172 for hints files to indicate that POSIX will not compile
2173 on a particular system.
2176 This variable is set to true when the user agrees to use sfio.
2177 It is set to false when sfio is not available or when the user
2178 explicitely requests not to use sfio. It is here primarily so
2179 that command-line settings can override the auto-detection of
2180 d_sfio without running into a "WHOA THERE".
2182 useshrplib (libperl.U):
2183 This variable is set to 'yes' if the user wishes
2184 to build a shared libperl, and 'no' otherwise.
2186 usethreads (usethreads.U):
2187 This variable conditionally defines the USE_THREADS symbol,
2188 and indicates that Perl should be built to use threads.
2190 usevfork (d_vfork.U):
2191 This variable is set to true when the user accepts to use vfork.
2192 It is set to false when no vfork is available or when the user
2193 explicitely requests not to use vfork.
2196 This variable holds the path of the include files, which is
2197 usually /usr/include. It is mainly used by other Configure units.
2199 version (patchlevel.U):
2200 The full version number of this package. This combines
2201 baserev, patchlevel, and subversion to get the full
2202 version number, including any possible subversions. Care
2203 is taken to use the C locale in order to get something
2204 like 5.004 instead of 5,004. This is unique to perl.
2206 voidflags (voidflags.U):
2207 This variable contains the eventual value of the VOIDFLAGS symbol,
2208 which indicates how much support of the void type is given by this
2209 compiler. See VOIDFLAGS for more info.