1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double. Usual values are 2, 4 and 8.
31 ansi2knr (ansi2knr.U):
32 This variable is set if the user needs to run ansi2knr.
33 Currently, this is not supported, so we just abort.
35 aphostname (d_gethname.U):
36 Thie variable contains the command which can be used to compute the
37 host name. The command is fully qualified by its absolute path, to make
38 it safe when used by a process with super-user privileges.
40 apiversion (patchlevel.U):
41 This is a number which identifies the lowest version of perl
42 to have an API (for XS extensions) compatible with the present
43 version. For example, for 5.005_01, the apiversion should be
44 5.005, since 5.005_01 should be binary compatible with 5.005.
45 This should probably be incremented manually somehow, perhaps
46 from patchlevel.h. For now, we'll guess maintenance subversions
47 will retain binary compatibility.
50 This variable holds the name of the directory in which the user wants
51 to put architecture-dependent public library files for $package.
52 It is most often a local directory such as /usr/local/lib.
53 Programs using this variable must be prepared to deal
54 with filename expansion.
56 archlibexp (archlib.U):
57 This variable is the same as the archlib variable, but is
58 filename expanded at configuration time, for convenient use.
60 archname (archname.U):
61 This variable is a short name to characterize the current
62 architecture. It is used mainly to construct the default archlib.
65 This variable defines any additional objects that must be linked
66 in with the program on this architecture. On unix, it is usually
67 empty. It is typically used to include emulations of unix calls
68 or other facilities. For perl on OS/2, for example, this would
72 The base revision level of this package, from the .package file.
75 This variable holds the name of the directory in which the user wants
76 to put publicly executable images for the package in question. It
77 is most often a local directory such as /usr/local/bin. Programs using
78 this variable must be prepared to deal with ~name substitution.
81 This is the same as the bin variable, but is filename expanded at
82 configuration time, for use in your makefiles.
84 byteorder (byteorder.U):
85 This variable holds the byte order. In the following, larger digits
86 indicate more significance. The variable byteorder is either 4321
87 on a big-endian machine, or 1234 on a little-endian, or 87654321
88 on a Cray ... or 3412 with weird order !
91 This variable contains the \c string if that is what causes the echo
92 command to suppress newline. Otherwise it is null. Correct usage is
93 $echo $n "prompt for a question: $c".
95 castflags (d_castneg.U):
96 This variable contains a flag that precise difficulties the
97 compiler has casting odd floating values to unsigned long:
100 2 = couldn't cast >= 0x80000000
101 4 = couldn't cast in argument expression list
104 This variable holds the name of a command to execute a C compiler which
105 can resolve multiple global references that happen to have the same
106 name. Usual values are "cc", "Mcc", "cc -M", and "gcc".
108 cccdlflags (dlsrc.U):
109 This variable contains any special flags that might need to be
110 passed with cc -c to compile modules to be used to create a shared
111 library that will be used for dynamic loading. For hpux, this
112 should be +z. It is up to the makefile to use it.
115 This variable contains any special flags that might need to be
116 passed to cc to link with a shared library for dynamic loading.
117 It is up to the makefile to use it. For sunos 4.1, it should
121 This variable contains any additional C compiler flags desired by
122 the user. It is up to the Makefile to use this.
125 Login name of the person who ran the Configure script and answered the
126 questions. This is used to tag both config.sh and config_h.SH.
128 cf_email (cf_email.U):
129 Electronic mail address of the person who ran Configure. This can be
130 used by units that require the user's e-mail, like MailList.U.
133 Holds the output of the "date" command when the configuration file was
134 produced. This is used to tag both config.sh and config_h.SH.
136 clocktype (d_times.U):
137 This variable holds the type returned by times(). It can be long,
138 or clock_t on BSD sites (in which case <sys/types.h> should be
141 contains (contains.U):
142 This variable holds the command to do a grep with a proper return
143 status. On most sane systems it is simply "grep". On insane systems
144 it is a grep followed by a cat followed by a test. This variable
145 is primarily for the use of other Configure units.
147 cpp_stuff (cpp_stuff.U):
148 This variable contains an identification of the catenation mechanism
149 used by the C preprocessor.
151 cppflags (ccflags.U):
152 This variable holds the flags that will be passed to the C pre-
153 processor. It is up to the Makefile to use it.
155 cpplast (cppstdin.U):
156 This variable has the same functionality as cppminus, only it applies to
157 cpprun and not cppstdin.
159 cppminus (cppstdin.U):
160 This variable contains the second part of the string which will invoke
161 the C preprocessor on the standard input and produce to standard
162 output. This variable will have the value "-" if cppstdin needs a minus
163 to specify standard input, otherwise the value is "".
166 This variable contains the command which will invoke a C preprocessor
167 on standard input and put the output to stdout. It is guaranteed not
168 to be a wrapper and may be a null string if no preprocessor can be
169 made directly available. This preprocessor might be different from the
170 one used by the C compiler. Don't forget to append cpplast after the
171 preprocessor options.
173 cppstdin (cppstdin.U):
174 This variable contains the command which will invoke the C
175 preprocessor on standard input and put the output to stdout.
176 It is primarily used by other Configure units that ask about
177 preprocessor symbols.
179 cryptlib (d_crypt.U):
180 This variable holds -lcrypt or the path to a libcrypt.a archive if
181 the crypt() function is not defined in the standard C library. It is
182 up to the Makefile to use this.
184 d_Gconvert (d_gconvert.U):
185 This variable holds what Gconvert is defined as to convert
186 floating point numbers into strings. It could be 'gconvert'
187 or a more complex macro emulating gconvert with gcvt() or sprintf.
189 d_access (d_access.U):
190 This variable conditionally defines HAS_ACCESS if the access() system
191 call is available to check for access permissions using real IDs.
194 This variable conditionally defines the HAS_ALARM symbol, which
195 indicates to the C program that the alarm() routine is available.
197 d_archlib (archlib.U):
198 This variable conditionally defines ARCHLIB to hold the pathname
199 of architecture-dependent library files for $package. If
200 $archlib is the same as $privlib, then this is set to undef.
202 d_attribut (d_attribut.U):
203 This variable conditionally defines HASATTRIBUTE, which
204 indicates the C compiler can check for function attributes,
205 such as printf formats.
208 This variable conditionally defines the HAS_BCMP symbol if
209 the bcmp() routine is available to compare strings.
212 This variable conditionally defines the HAS_BCOPY symbol if
213 the bcopy() routine is available to copy strings.
216 This symbol conditionally defines the symbol BSD when running on a
219 d_bsdgetpgrp (d_getpgrp.U):
220 This variable conditionally defines USE_BSD_GETPGRP if
221 getpgrp needs one arguments whereas USG one needs none.
223 d_bsdsetpgrp (d_setpgrp.U):
224 This variable conditionally defines USE_BSD_SETPGRP if
225 setpgrp needs two arguments whereas USG one needs none.
226 See also d_setpgid for a POSIX interface.
229 This variable conditionally defines the HAS_BZERO symbol if
230 the bzero() routine is available to set memory to 0.
232 d_casti32 (d_casti32.U):
233 This variable conditionally defines CASTI32, which indicates
234 whether the C compiler can cast large floats to 32-bit ints.
236 d_castneg (d_castneg.U):
237 This variable conditionally defines CASTNEG, which indicates
238 wether the C compiler can cast negative float to unsigned.
240 d_charvspr (d_vprintf.U):
241 This variable conditionally defines CHARVSPRINTF if this system
242 has vsprintf returning type (char*). The trend seems to be to
243 declare it as "int vsprintf()".
246 This variable conditionally defines the HAS_CHOWN symbol, which
247 indicates to the C program that the chown() routine is available.
249 d_chroot (d_chroot.U):
250 This variable conditionally defines the HAS_CHROOT symbol, which
251 indicates to the C program that the chroot() routine is available.
253 d_chsize (d_chsize.U):
254 This variable conditionally defines the CHSIZE symbol, which
255 indicates to the C program that the chsize() routine is available
256 to truncate files. You might need a -lx to get this routine.
258 d_closedir (d_closedir.U):
259 This variable conditionally defines HAS_CLOSEDIR if closedir() is
263 This variable conditionally defines the HASCONST symbol, which
264 indicates to the C program that this C compiler knows about the
268 This variable conditionally defines the CRYPT symbol, which
269 indicates to the C program that the crypt() routine is available
270 to encrypt passwords and the like.
273 This variable conditionally defines the CSH symbol, which
274 indicates to the C program that the C-shell exists.
276 d_cuserid (d_cuserid.U):
277 This variable conditionally defines the HAS_CUSERID symbol, which
278 indicates to the C program that the cuserid() routine is available
279 to get character login names.
281 d_dbl_dig (d_dbl_dig.U):
282 This variable conditionally defines d_dbl_dig if this system's
283 header files provide DBL_DIG, which is the number of significant
284 digits in a double precision number.
286 d_difftime (d_difftime.U):
287 This variable conditionally defines the HAS_DIFFTIME symbol, which
288 indicates to the C program that the difftime() routine is available.
290 d_dirnamlen (i_dirent.U):
291 This variable conditionally defines DIRNAMLEN, which indicates
292 to the C program that the length of directory entry names is
293 provided by a d_namelen field.
295 d_dlerror (d_dlerror.U):
296 This variable conditionally defines the HAS_DLERROR symbol, which
297 indicates to the C program that the dlerror() routine is available.
299 d_dlopen (d_dlopen.U):
300 This variable conditionally defines the HAS_DLOPEN symbol, which
301 indicates to the C program that the dlopen() routine is available.
303 d_dlsymun (d_dlsymun.U):
304 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
305 indicates that we need to prepend an underscore to the symbol
306 name before calling dlsym().
308 d_dosuid (d_dosuid.U):
309 This variable conditionally defines the symbol DOSUID, which
310 tells the C program that it should insert setuid emulation code
311 on hosts which have setuid #! scripts disabled.
314 This variable conditionally defines HAS_DUP2 if dup2() is
315 available to duplicate file descriptors.
317 d_endhent (d_endhent.U):
318 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
319 available to close whatever was being used for host queries.
321 d_endnent (d_endnent.U):
322 This variable conditionally defines HAS_ENDNETENT if endnetent() is
323 available to close whatever was being used for network queries.
325 d_endpent (d_endpent.U):
326 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
327 available to close whatever was being used for protocol queries.
329 d_endsent (d_endsent.U):
330 This variable conditionally defines HAS_ENDSERVENT if endservent() is
331 available to close whatever was being used for service queries.
333 d_eofnblk (nblock_io.U):
334 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
335 when reading from a non-blocking I/O source.
338 This variable conditionally defines the symbols EUNICE and VAX, which
339 alerts the C program that it must deal with ideosyncracies of VMS.
341 d_fchmod (d_fchmod.U):
342 This variable conditionally defines the HAS_FCHMOD symbol, which
343 indicates to the C program that the fchmod() routine is available
344 to change mode of opened files.
346 d_fchown (d_fchown.U):
347 This variable conditionally defines the HAS_FCHOWN symbol, which
348 indicates to the C program that the fchown() routine is available
349 to change ownership of opened files.
352 This variable conditionally defines the HAS_FCNTL symbol, and indicates
353 whether the fcntl() function exists
355 d_fd_macros (d_fd_set.U):
356 This variable contains the eventual value of the HAS_FD_MACROS symbol,
357 which indicates if your C compiler knows about the macros which
358 manipulate an fd_set.
360 d_fd_set (d_fd_set.U):
361 This variable contains the eventual value of the HAS_FD_SET symbol,
362 which indicates if your C compiler knows about the fd_set typedef.
364 d_fds_bits (d_fd_set.U):
365 This variable contains the eventual value of the HAS_FDS_BITS symbol,
366 which indicates if your fd_set typedef contains the fds_bits member.
367 If you have an fd_set typedef, but the dweebs who installed it did
368 a half-fast job and neglected to provide the macros to manipulate
369 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
371 d_fgetpos (d_fgetpos.U):
372 This variable conditionally defines HAS_FGETPOS if fgetpos() is
373 available to get the file position indicator.
375 d_flexfnam (d_flexfnam.U):
376 This variable conditionally defines the FLEXFILENAMES symbol, which
377 indicates that the system supports filenames longer than 14 characters.
380 This variable conditionally defines HAS_FLOCK if flock() is
381 available to do file locking.
384 This variable conditionally defines the HAS_FORK symbol, which
385 indicates to the C program that the fork() routine is available.
387 d_fpathconf (d_pathconf.U):
388 This variable conditionally defines the HAS_FPATHCONF symbol, which
389 indicates to the C program that the pathconf() routine is available
390 to determine file-system related limits and options associated
391 with a given open file descriptor.
393 d_fsetpos (d_fsetpos.U):
394 This variable conditionally defines HAS_FSETPOS if fsetpos() is
395 available to set the file position indicator.
398 This variable conditionally defines the HAS_FTIME symbol, which indicates
399 that the ftime() routine exists. The ftime() routine is basically
400 a sub-second accuracy clock.
402 d_getgrps (d_getgrps.U):
403 This variable conditionally defines the HAS_GETGROUPS symbol, which
404 indicates to the C program that the getgroups() routine is available
405 to get the list of process groups.
407 d_gethbyaddr (d_gethbyad.U):
408 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
409 indicates to the C program that the gethostbyaddr() routine is available
410 to look up hosts by their IP addresses.
412 d_gethbyname (d_gethbynm.U):
413 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
414 indicates to the C program that the gethostbyname() routine is available
415 to look up host names in some data base or other.
417 d_gethent (d_gethent.U):
418 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
419 available to look up host names in some data base or another.
421 d_gethname (d_gethname.U):
422 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
423 indicates to the C program that the gethostname() routine may be
424 used to derive the host name.
426 d_gethostprotos (d_gethostprotos.U):
427 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
428 which indicates to the C program that <netdb.h> supplies
429 prototypes for the various gethost*() functions.
430 See also netdbtype.U for probing for various netdb types.
432 d_getlogin (d_getlogin.U):
433 This variable conditionally defines the HAS_GETLOGIN symbol, which
434 indicates to the C program that the getlogin() routine is available
435 to get the login name.
437 d_getnbyaddr (d_getnbyad.U):
438 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
439 indicates to the C program that the getnetbyaddr() routine is available
440 to look up networks by their IP addresses.
442 d_getnbyname (d_getnbynm.U):
443 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
444 indicates to the C program that the getnetbyname() routine is available
445 to look up networks by their names.
447 d_getnent (d_getnent.U):
448 This variable conditionally defines HAS_GETNETENT if getnetent() is
449 available to look up network names in some data base or another.
451 d_getnetprotos (d_getnetprotos.U):
452 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
453 which indicates to the C program that <netdb.h> supplies
454 prototypes for the various getnet*() functions.
455 See also netdbtype.U for probing for various netdb types.
457 d_getpbyname (d_getprotby.U):
458 This variable conditionally defines the HAS_GETPROTOBYNAME
459 symbol, which indicates to the C program that the
460 getprotobyname() routine is available to look up protocols
463 d_getpbynumber (d_getprotby.U):
464 This variable conditionally defines the HAS_GETPROTOBYNUMBER
465 symbol, which indicates to the C program that the
466 getprotobynumber() routine is available to look up protocols
469 d_getpent (d_getpent.U):
470 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
471 available to look up protocols in some data base or another.
473 d_getpgid (d_getpgid.U):
474 This variable conditionally defines the HAS_GETPGID symbol, which
475 indicates to the C program that the getpgid(pid) function
476 is available to get the process group id.
478 d_getpgrp2 (d_getpgrp2.U):
479 This variable conditionally defines the HAS_GETPGRP2 symbol, which
480 indicates to the C program that the getpgrp2() (as in DG/UX) routine
481 is available to get the current process group.
483 d_getpgrp (d_getpgrp.U):
484 This variable conditionally defines HAS_GETPGRP if getpgrp() is
485 available to get the current process group.
487 d_getppid (d_getppid.U):
488 This variable conditionally defines the HAS_GETPPID symbol, which
489 indicates to the C program that the getppid() routine is available
490 to get the parent process ID.
492 d_getprior (d_getprior.U):
493 This variable conditionally defines HAS_GETPRIORITY if getpriority()
494 is available to get a process's priority.
496 d_getprotoprotos (d_getprotoprotos.U):
497 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
498 which indicates to the C program that <netdb.h> supplies
499 prototypes for the various getproto*() functions.
500 See also netdbtype.U for probing for various netdb types.
502 d_getsbyname (d_getsrvby.U):
503 This variable conditionally defines the HAS_GETSERVBYNAME
504 symbol, which indicates to the C program that the
505 getservbyname() routine is available to look up services
508 d_getsbyport (d_getsrvby.U):
509 This variable conditionally defines the HAS_GETSERVBYPORT
510 symbol, which indicates to the C program that the
511 getservbyport() routine is available to look up services
514 d_getsent (d_getsent.U):
515 This variable conditionally defines HAS_GETSERVENT if getservent() is
516 available to look up network services in some data base or another.
518 d_getservprotos (d_getservprotos.U):
519 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
520 which indicates to the C program that <netdb.h> supplies
521 prototypes for the various getserv*() functions.
522 See also netdbtype.U for probing for various netdb types.
524 d_gettimeod (d_ftime.U):
525 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
526 indicates that the gettimeofday() system call exists (to obtain a
527 sub-second accuracy clock). You should probably include <sys/resource.h>.
529 d_gnulibc (d_gnulibc.U):
530 Defined if we're dealing with the GNU C Library.
533 This variable conditionally defines HAS_HTONL if htonl() and its
534 friends are available to do network order byte swapping.
536 d_index (d_strchr.U):
537 This variable conditionally defines HAS_INDEX if index() and
538 rindex() are available for string searching.
540 d_inetaton (d_inetaton.U):
541 This variable conditionally defines the HAS_INET_ATON symbol, which
542 indicates to the C program that the inet_aton() function is available
543 to parse IP address "dotted-quad" strings.
545 d_isascii (d_isascii.U):
546 This variable conditionally defines the HAS_ISASCII constant,
547 which indicates to the C program that isascii() is available.
549 d_killpg (d_killpg.U):
550 This variable conditionally defines the HAS_KILLPG symbol, which
551 indicates to the C program that the killpg() routine is available
552 to kill process groups.
554 d_lchown (d_lchown.U):
555 This variable conditionally defines the HAS_LCHOWN symbol, which
556 indicates to the C program that the lchown() routine is available
557 to operate on a symbolic link (instead of following the link).
560 This variable conditionally defines HAS_LINK if link() is
561 available to create hard links.
563 d_locconv (d_locconv.U):
564 This variable conditionally defines HAS_LOCALECONV if localeconv() is
565 available for numeric and monetary formatting conventions.
568 This variable conditionally defines HAS_LOCKF if lockf() is
569 available to do file locking.
571 d_longdbl (d_longdbl.U):
572 This variable conditionally defines HAS_LONG_DOUBLE if
573 the long double type is supported.
575 d_longlong (d_longlong.U):
576 This variable conditionally defines HAS_LONG_LONG if
577 the long long type is supported.
580 This variable conditionally defines HAS_LSTAT if lstat() is
581 available to do file stats on symbolic links.
584 This variable conditionally defines the HAS_MBLEN symbol, which
585 indicates to the C program that the mblen() routine is available
586 to find the number of bytes in a multibye character.
588 d_mbstowcs (d_mbstowcs.U):
589 This variable conditionally defines the HAS_MBSTOWCS symbol, which
590 indicates to the C program that the mbstowcs() routine is available
591 to convert a multibyte string into a wide character string.
593 d_mbtowc (d_mbtowc.U):
594 This variable conditionally defines the HAS_MBTOWC symbol, which
595 indicates to the C program that the mbtowc() routine is available
596 to convert multibyte to a wide character.
598 d_memcmp (d_memcmp.U):
599 This variable conditionally defines the HAS_MEMCMP symbol, which
600 indicates to the C program that the memcmp() routine is available
601 to compare blocks of memory.
603 d_memcpy (d_memcpy.U):
604 This variable conditionally defines the HAS_MEMCPY symbol, which
605 indicates to the C program that the memcpy() routine is available
606 to copy blocks of memory.
608 d_memmove (d_memmove.U):
609 This variable conditionally defines the HAS_MEMMOVE symbol, which
610 indicates to the C program that the memmove() routine is available
611 to copy potentatially overlapping blocks of memory.
613 d_memset (d_memset.U):
614 This variable conditionally defines the HAS_MEMSET symbol, which
615 indicates to the C program that the memset() routine is available
616 to set blocks of memory.
619 This variable conditionally defines the HAS_MKDIR symbol, which
620 indicates to the C program that the mkdir() routine is available
621 to create directories..
623 d_mkfifo (d_mkfifo.U):
624 This variable conditionally defines the HAS_MKFIFO symbol, which
625 indicates to the C program that the mkfifo() routine is available.
627 d_mktime (d_mktime.U):
628 This variable conditionally defines the HAS_MKTIME symbol, which
629 indicates to the C program that the mktime() routine is available.
632 This variable conditionally defines the HAS_MSG symbol, which
633 indicates that the entire msg*(2) library is present.
635 d_msgctl (d_msgctl.U):
636 This variable conditionally defines the HAS_MSGCTL symbol, which
637 indicates to the C program that the msgctl() routine is available.
639 d_msgget (d_msgget.U):
640 This variable conditionally defines the HAS_MSGGET symbol, which
641 indicates to the C program that the msgget() routine is available.
643 d_msgrcv (d_msgrcv.U):
644 This variable conditionally defines the HAS_MSGRCV symbol, which
645 indicates to the C program that the msgrcv() routine is available.
647 d_msgsnd (d_msgsnd.U):
648 This variable conditionally defines the HAS_MSGSND symbol, which
649 indicates to the C program that the msgsnd() routine is available.
651 d_mymalloc (mallocsrc.U):
652 This variable conditionally defines MYMALLOC in case other parts
653 of the source want to take special action if MYMALLOC is used.
654 This may include different sorts of profiling or error detection.
657 This variable conditionally defines the HAS_NICE symbol, which
658 indicates to the C program that the nice() routine is available.
660 d_oldpthreads (usethreads.U):
661 This variable conditionally defines the OLD_PTHREADS_API symbol,
662 and indicates that Perl should be built to use the old
663 draft POSIX threads API. This is only potneially meaningful if
666 d_oldsock (d_socket.U):
667 This variable conditionally defines the OLDSOCKET symbol, which
668 indicates that the BSD socket interface is based on 4.1c and not 4.2.
671 This variable conditionally defines the HAS_OPEN3 manifest constant,
672 which indicates to the C program that the 3 argument version of
673 the open(2) function is available.
675 d_pathconf (d_pathconf.U):
676 This variable conditionally defines the HAS_PATHCONF symbol, which
677 indicates to the C program that the pathconf() routine is available
678 to determine file-system related limits and options associated
679 with a given filename.
682 This variable conditionally defines the HAS_PAUSE symbol, which
683 indicates to the C program that the pause() routine is available
684 to suspend a process until a signal is received.
686 d_phostname (d_gethname.U):
687 This variable conditionally defines the PHOSTNAME symbol, which
688 contains the shell command which, when fed to popen(), may be
689 used to derive the host name.
692 This variable conditionally defines the HAS_PIPE symbol, which
693 indicates to the C program that the pipe() routine is available
694 to create an inter-process channel.
697 This variable conditionally defines the HAS_POLL symbol, which
698 indicates to the C program that the poll() routine is available
699 to poll active file descriptors.
701 d_portable (d_portable.U):
702 This variable conditionally defines the PORTABLE symbol, which
703 indicates to the C program that it should not assume that it is
704 running on the machine it was compiled on.
706 d_pthread_yield (d_pthread_y.U):
707 This variable conditionally defines the HAS_PTHREAD_YIELD
708 symbol if the pthread_yield routine is available to yield
709 the execution of the current thread.
711 d_pthreads_created_joinable (d_pthreadj.U):
712 This variable conditionally defines the PTHREADS_CREATED_JOINABLE
713 symbol if pthreads are created in the joinable (aka undetached)
717 This variable conditionally defines PWAGE, which indicates
718 that struct passwd contains pw_age.
720 d_pwchange (i_pwd.U):
721 This variable conditionally defines PWCHANGE, which indicates
722 that struct passwd contains pw_change.
725 This variable conditionally defines PWCLASS, which indicates
726 that struct passwd contains pw_class.
728 d_pwcomment (i_pwd.U):
729 This variable conditionally defines PWCOMMENT, which indicates
730 that struct passwd contains pw_comment.
732 d_pwexpire (i_pwd.U):
733 This variable conditionally defines PWEXPIRE, which indicates
734 that struct passwd contains pw_expire.
737 This variable conditionally defines PWGECOS, which indicates
738 that struct passwd contains pw_gecos.
741 This variable conditionally defines PWQUOTA, which indicates
742 that struct passwd contains pw_quota.
744 d_readdir (d_readdir.U):
745 This variable conditionally defines HAS_READDIR if readdir() is
746 available to read directory entries.
748 d_readlink (d_readlink.U):
749 This variable conditionally defines the HAS_READLINK symbol, which
750 indicates to the C program that the readlink() routine is available
751 to read the value of a symbolic link.
753 d_rename (d_rename.U):
754 This variable conditionally defines the HAS_RENAME symbol, which
755 indicates to the C program that the rename() routine is available
758 d_rewinddir (d_readdir.U):
759 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
763 This variable conditionally defines HAS_RMDIR if rmdir() is
764 available to remove directories.
766 d_safebcpy (d_safebcpy.U):
767 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
768 the bcopy() routine can do overlapping copies.
770 d_safemcpy (d_safemcpy.U):
771 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
772 the memcpy() routine can do overlapping copies.
774 d_sanemcmp (d_sanemcmp.U):
775 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
776 the memcpy() routine is available and can be used to compare relative
777 magnitudes of chars with their high bits set.
779 d_sched_yield (d_pthread_y.U):
780 This variable conditionally defines the HAS_SCHED_YIELD
781 symbol if the sched_yield routine is available to yield
782 the execution of the current thread.
784 d_seekdir (d_readdir.U):
785 This variable conditionally defines HAS_SEEKDIR if seekdir() is
788 d_select (d_select.U):
789 This variable conditionally defines HAS_SELECT if select() is
790 available to select active file descriptors. A <sys/time.h>
791 inclusion may be necessary for the timeout field.
794 This variable conditionally defines the HAS_SEM symbol, which
795 indicates that the entire sem*(2) library is present.
797 d_semctl (d_semctl.U):
798 This variable conditionally defines the HAS_SEMCTL symbol, which
799 indicates to the C program that the semctl() routine is available.
801 d_semctl_semid_ds (d_union_senum.U):
802 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
803 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
805 d_semctl_semun (d_union_senum.U):
806 This variable conditionally defines USE_SEMCTL_SEMUN, which
807 indicates that union semun is to be used for semctl IPC_STAT.
809 d_semget (d_semget.U):
810 This variable conditionally defines the HAS_SEMGET symbol, which
811 indicates to the C program that the semget() routine is available.
814 This variable conditionally defines the HAS_SEMOP symbol, which
815 indicates to the C program that the semop() routine is available.
817 d_setegid (d_setegid.U):
818 This variable conditionally defines the HAS_SETEGID symbol, which
819 indicates to the C program that the setegid() routine is available
820 to change the effective gid of the current program.
822 d_seteuid (d_seteuid.U):
823 This variable conditionally defines the HAS_SETEUID symbol, which
824 indicates to the C program that the seteuid() routine is available
825 to change the effective uid of the current program.
827 d_setgrps (d_setgrps.U):
828 This variable conditionally defines the HAS_SETGROUPS symbol, which
829 indicates to the C program that the setgroups() routine is available
830 to set the list of process groups.
832 d_sethent (d_sethent.U):
833 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
836 d_setlinebuf (d_setlnbuf.U):
837 This variable conditionally defines the HAS_SETLINEBUF symbol, which
838 indicates to the C program that the setlinebuf() routine is available
839 to change stderr or stdout from block-buffered or unbuffered to a
842 d_setlocale (d_setlocale.U):
843 This variable conditionally defines HAS_SETLOCALE if setlocale() is
844 available to handle locale-specific ctype implementations.
846 d_setnent (d_setnent.U):
847 This variable conditionally defines HAS_SETNETENT if setnetent() is
850 d_setpent (d_setpent.U):
851 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
854 d_setpgid (d_setpgid.U):
855 This variable conditionally defines the HAS_SETPGID symbol if the
856 setpgid(pid, gpid) function is available to set process group ID.
858 d_setpgrp2 (d_setpgrp2.U):
859 This variable conditionally defines the HAS_SETPGRP2 symbol, which
860 indicates to the C program that the setpgrp2() (as in DG/UX) routine
861 is available to set the current process group.
863 d_setpgrp (d_setpgrp.U):
864 This variable conditionally defines HAS_SETPGRP if setpgrp() is
865 available to set the current process group.
867 d_setprior (d_setprior.U):
868 This variable conditionally defines HAS_SETPRIORITY if setpriority()
869 is available to set a process's priority.
871 d_setregid (d_setregid.U):
872 This variable conditionally defines HAS_SETREGID if setregid() is
873 available to change the real and effective gid of the current
876 d_setresgid (d_setregid.U):
877 This variable conditionally defines HAS_SETRESGID if setresgid() is
878 available to change the real, effective and saved gid of the current
881 d_setresuid (d_setreuid.U):
882 This variable conditionally defines HAS_SETREUID if setresuid() is
883 available to change the real, effective and saved uid of the current
886 d_setreuid (d_setreuid.U):
887 This variable conditionally defines HAS_SETREUID if setreuid() is
888 available to change the real and effective uid of the current
891 d_setrgid (d_setrgid.U):
892 This variable conditionally defines the HAS_SETRGID symbol, which
893 indicates to the C program that the setrgid() routine is available
894 to change the real gid of the current program.
896 d_setruid (d_setruid.U):
897 This variable conditionally defines the HAS_SETRUID symbol, which
898 indicates to the C program that the setruid() routine is available
899 to change the real uid of the current program.
901 d_setsent (d_setsent.U):
902 This variable conditionally defines HAS_SETSERVENT if setservent() is
905 d_setsid (d_setsid.U):
906 This variable conditionally defines HAS_SETSID if setsid() is
907 available to set the process group ID.
909 d_setvbuf (d_setvbuf.U):
910 This variable conditionally defines the HAS_SETVBUF symbol, which
911 indicates to the C program that the setvbuf() routine is available
912 to change buffering on an open stdio stream.
915 This variable conditionally defines the USE_SFIO symbol,
916 and indicates whether sfio is available (and should be used).
919 This variable conditionally defines the HAS_SHM symbol, which
920 indicates that the entire shm*(2) library is present.
923 This variable conditionally defines the HAS_SHMAT symbol, which
924 indicates to the C program that the shmat() routine is available.
926 d_shmatprototype (d_shmat.U):
927 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
928 symbol, which indicates that sys/shm.h has a prototype for
931 d_shmctl (d_shmctl.U):
932 This variable conditionally defines the HAS_SHMCTL symbol, which
933 indicates to the C program that the shmctl() routine is available.
936 This variable conditionally defines the HAS_SHMDT symbol, which
937 indicates to the C program that the shmdt() routine is available.
939 d_shmget (d_shmget.U):
940 This variable conditionally defines the HAS_SHMGET symbol, which
941 indicates to the C program that the shmget() routine is available.
943 d_sigaction (d_sigaction.U):
944 This variable conditionally defines the HAS_SIGACTION symbol, which
945 indicates that the Vr4 sigaction() routine is available.
947 d_sigsetjmp (d_sigsetjmp.U):
948 This variable conditionally defines the HAS_SIGSETJMP symbol,
949 which indicates that the sigsetjmp() routine is available to
950 call setjmp() and optionally save the process's signal mask.
952 d_socket (d_socket.U):
953 This variable conditionally defines HAS_SOCKET, which indicates
954 that the BSD socket interface is supported.
956 d_sockpair (d_socket.U):
957 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
958 indicates that the BSD socketpair() is supported.
960 d_statblks (d_statblks.U):
961 This variable conditionally defines USE_STAT_BLOCKS if this system
962 has a stat structure declaring st_blksize and st_blocks.
964 d_stdio_cnt_lval (d_stdstdio.U):
965 This variable conditionally defines STDIO_CNT_LVALUE if the
966 FILE_cnt macro can be used as an lvalue.
968 d_stdio_ptr_lval (d_stdstdio.U):
969 This variable conditionally defines STDIO_PTR_LVALUE if the
970 FILE_ptr macro can be used as an lvalue.
972 d_stdiobase (d_stdstdio.U):
973 This variable conditionally defines USE_STDIO_BASE if this system
974 has a FILE structure declaring a usable _base field (or equivalent)
977 d_stdstdio (d_stdstdio.U):
978 This variable conditionally defines USE_STDIO_PTR if this system
979 has a FILE structure declaring usable _ptr and _cnt fields (or
980 equivalent) in stdio.h.
982 d_strchr (d_strchr.U):
983 This variable conditionally defines HAS_STRCHR if strchr() and
984 strrchr() are available for string searching.
986 d_strcoll (d_strcoll.U):
987 This variable conditionally defines HAS_STRCOLL if strcoll() is
988 available to compare strings using collating information.
990 d_strctcpy (d_strctcpy.U):
991 This variable conditionally defines the USE_STRUCT_COPY symbol, which
992 indicates to the C program that this C compiler knows how to copy
995 d_strerrm (d_strerror.U):
996 This variable holds what Strerrr is defined as to translate an error
997 code condition into an error message string. It could be 'strerror'
998 or a more complex macro emulating strrror with sys_errlist[], or the
999 "unknown" string when both strerror and sys_errlist are missing.
1001 d_strerror (d_strerror.U):
1002 This variable conditionally defines HAS_STRERROR if strerror() is
1003 available to translate error numbers to strings.
1005 d_strtod (d_strtod.U):
1006 This variable conditionally defines the HAS_STRTOD symbol, which
1007 indicates to the C program that the strtod() routine is available
1008 to provide better numeric string conversion than atof().
1010 d_strtol (d_strtol.U):
1011 This variable conditionally defines the HAS_STRTOL symbol, which
1012 indicates to the C program that the strtol() routine is available
1013 to provide better numeric string conversion than atoi() and friends.
1015 d_strtoul (d_strtoul.U):
1016 This variable conditionally defines the HAS_STRTOUL symbol, which
1017 indicates to the C program that the strtoul() routine is available
1018 to provide conversion of strings to unsigned long.
1020 d_strxfrm (d_strxfrm.U):
1021 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1022 available to transform strings.
1024 d_suidsafe (d_dosuid.U):
1025 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1026 if setuid scripts can be secure. This test looks in /dev/fd/.
1028 d_symlink (d_symlink.U):
1029 This variable conditionally defines the HAS_SYMLINK symbol, which
1030 indicates to the C program that the symlink() routine is available
1031 to create symbolic links.
1033 d_syscall (d_syscall.U):
1034 This variable conditionally defines HAS_SYSCALL if syscall() is
1035 available call arbitrary system calls.
1037 d_sysconf (d_sysconf.U):
1038 This variable conditionally defines the HAS_SYSCONF symbol, which
1039 indicates to the C program that the sysconf() routine is available
1040 to determine system related limits and options.
1042 d_sysernlst (d_strerror.U):
1043 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1044 is available to translate error numbers to the symbolic name.
1046 d_syserrlst (d_strerror.U):
1047 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1048 available to translate error numbers to strings.
1050 d_system (d_system.U):
1051 This variable conditionally defines HAS_SYSTEM if system() is
1052 available to issue a shell command.
1054 d_tcgetpgrp (d_tcgtpgrp.U):
1055 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1056 indicates to the C program that the tcgetpgrp() routine is available.
1057 to get foreground process group ID.
1059 d_tcsetpgrp (d_tcstpgrp.U):
1060 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1061 indicates to the C program that the tcsetpgrp() routine is available
1062 to set foreground process group ID.
1064 d_telldir (d_readdir.U):
1065 This variable conditionally defines HAS_TELLDIR if telldir() is
1069 This variable conditionally defines the HAS_TIME symbol, which indicates
1070 that the time() routine exists. The time() routine is normaly
1071 provided on UNIX systems.
1073 d_times (d_times.U):
1074 This variable conditionally defines the HAS_TIMES symbol, which indicates
1075 that the times() routine exists. The times() routine is normaly
1076 provided on UNIX systems. You may have to include <sys/times.h>.
1078 d_truncate (d_truncate.U):
1079 This variable conditionally defines HAS_TRUNCATE if truncate() is
1080 available to truncate files.
1082 d_tzname (d_tzname.U):
1083 This variable conditionally defines HAS_TZNAME if tzname[] is
1084 available to access timezone names.
1086 d_umask (d_umask.U):
1087 This variable conditionally defines the HAS_UMASK symbol, which
1088 indicates to the C program that the umask() routine is available.
1089 to set and get the value of the file creation mask.
1091 d_uname (d_gethname.U):
1092 This variable conditionally defines the HAS_UNAME symbol, which
1093 indicates to the C program that the uname() routine may be
1094 used to derive the host name.
1096 d_union_semun (d_union_senum.U):
1097 This variable conditionally defines HAS_UNION_SEMUN if the
1098 union semun is defined by including <sys/sem.h>.
1100 d_vfork (d_vfork.U):
1101 This variable conditionally defines the HAS_VFORK symbol, which
1102 indicates the vfork() routine is available.
1104 d_void_closedir (d_closedir.U):
1105 This variable conditionally defines VOID_CLOSEDIR if closedir()
1106 does not return a value.
1108 d_voidsig (d_voidsig.U):
1109 This variable conditionally defines VOIDSIG if this system
1110 declares "void (*signal(...))()" in signal.h. The old way was to
1111 declare it as "int (*signal(...))()".
1113 d_voidtty (i_sysioctl.U):
1114 This variable conditionally defines USE_IOCNOTTY to indicate that the
1115 ioctl() call with TIOCNOTTY should be used to void tty association.
1116 Otherwise (on USG probably), it is enough to close the standard file
1117 decriptors and do a setpgrp().
1119 d_volatile (d_volatile.U):
1120 This variable conditionally defines the HASVOLATILE symbol, which
1121 indicates to the C program that this C compiler knows about the
1122 volatile declaration.
1124 d_vprintf (d_vprintf.U):
1125 This variable conditionally defines the HAS_VPRINTF symbol, which
1126 indicates to the C program that the vprintf() routine is available
1127 to printf with a pointer to an argument list.
1129 d_wait4 (d_wait4.U):
1130 This variable conditionally defines the HAS_WAIT4 symbol, which
1131 indicates the wait4() routine is available.
1133 d_waitpid (d_waitpid.U):
1134 This variable conditionally defines HAS_WAITPID if waitpid() is
1135 available to wait for child process.
1137 d_wcstombs (d_wcstombs.U):
1138 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1139 indicates to the C program that the wcstombs() routine is available
1140 to convert wide character strings to multibyte strings.
1142 d_wctomb (d_wctomb.U):
1143 This variable conditionally defines the HAS_WCTOMB symbol, which
1144 indicates to the C program that the wctomb() routine is available
1145 to convert a wide character to a multibyte.
1148 This variable conditionally defines the symbol XENIX, which alerts
1149 the C program that it runs under Xenix.
1151 db_hashtype (i_db.U):
1152 This variable contains the type of the hash structure element
1153 in the <db.h> header file. In older versions of DB, it was
1154 int, while in newer ones it is u_int32_t.
1156 db_prefixtype (i_db.U):
1157 This variable contains the type of the prefix structure element
1158 in the <db.h> header file. In older versions of DB, it was
1159 int, while in newer ones it is size_t.
1161 direntrytype (i_dirent.U):
1162 This symbol is set to 'struct direct' or 'struct dirent' depending on
1163 whether dirent is available or not. You should use this pseudo type to
1164 portably declare your directory entries.
1167 This variable contains the extension that is to be used for the
1168 dynamically loaded modules that perl generaties.
1171 This variable contains the name of the dynamic loading file that
1172 will be used with the package.
1174 doublesize (doublesize.U):
1175 This variable contains the value of the DOUBLESIZE symbol, which
1176 indicates to the C program how many bytes there are in a double.
1178 dynamic_ext (Extensions.U):
1179 This variable holds a list of XS extension files we want to
1180 link dynamically into the package. It is used by Makefile.
1182 eagain (nblock_io.U):
1183 This variable bears the symbolic errno code set by read() when no
1184 data is present on the file and non-blocking I/O was enabled (otherwise,
1185 read() blocks naturally).
1188 When running under Eunice this variable contains a command which will
1189 convert a shell script to the proper form of text file for it to be
1190 executable by the shell. On other systems it is a no-op.
1193 This is an old synonym for _exe.
1195 extensions (Extensions.U):
1196 This variable holds a list of all extension files (both XS and
1197 non-xs linked into the package. It is propagated to Config.pm
1198 and is typically used to test whether a particular extesion
1201 firstmakefile (Unix.U):
1202 This variable defines the first file searched by make. On unix,
1203 it is makefile (then Makefile). On case-insensitive systems,
1204 it might be something else. This is only used to deal with
1205 convoluted make depend tricks.
1207 fpostype (fpostype.U):
1208 This variable defines Fpos_t to be something like fpost_t, long,
1209 uint, or whatever type is used to declare file positions in libc.
1211 freetype (mallocsrc.U):
1212 This variable contains the return type of free(). It is usually
1213 void, but occasionally int.
1216 This variable contains the full pathname to 'csh', whether or
1217 not the user has specified 'portability'. This is only used
1218 in the compiled C program, and we assume that all systems which
1219 can share this executable will have the same full pathname to
1222 full_sed (Loc_sed.U):
1223 This variable contains the full pathname to 'sed', whether or
1224 not the user has specified 'portability'. This is only used
1225 in the compiled C program, and we assume that all systems which
1226 can share this executable will have the same full pathname to
1230 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1231 indicate whether the compiler is version 1 or 2. This is used in
1232 setting some of the default cflags. It is set to '' if not gcc.
1234 gidtype (gidtype.U):
1235 This variable defines Gid_t to be something like gid_t, int,
1236 ushort, or whatever type is used to declare the return type
1237 of getgid(). Typically, it is the type of group ids in the kernel.
1240 This variable contains a command that produces the text of the
1241 /etc/group file. This is normally "cat /etc/group", but can be
1242 "ypcat group" when NIS is used.
1244 groupstype (groupstype.U):
1245 This variable defines Groups_t to be something like gid_t, int,
1246 ushort, or whatever type is used for the second argument to
1247 getgroups() and setgroups(). Usually, this is the same as
1248 gidtype (gid_t), but sometimes it isn't.
1250 h_fcntl (h_fcntl.U):
1251 This is variable gets set in various places to tell i_fcntl that
1252 <fcntl.h> should be included.
1254 h_sysfile (h_sysfile.U):
1255 This is variable gets set in various places to tell i_sys_file that
1256 <sys/file.h> should be included.
1259 Gives the type of hints used for previous answers. May be one of
1260 "default", "recommended" or "previous".
1263 This variable contains a command that produces the text of the
1264 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1265 "ypcat hosts" when NIS is used.
1268 This variable contains a flag which will tell the C compiler and loader
1269 to produce a program running with a huge memory model. If the
1270 huge model is not supported, contains the flag to produce large
1271 model programs. It is up to the Makefile to use this.
1273 i_bsdioctl (i_sysioctl.U):
1274 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1275 indicates to the C program that <sys/bsdioctl.h> exists and should
1279 This variable conditionally defines the I_DB symbol, and indicates
1280 whether a C program may include Berkeley's DB include file <db.h>.
1283 This variable conditionally defines the I_DBM symbol, which
1284 indicates to the C program that <dbm.h> exists and should
1287 i_dirent (i_dirent.U):
1288 This variable conditionally defines I_DIRENT, which indicates
1289 to the C program that it should include <dirent.h>.
1292 This variable conditionally defines the I_DLD symbol, which
1293 indicates to the C program that <dld.h> (GNU dynamic loading)
1294 exists and should be included.
1296 i_dlfcn (i_dlfcn.U):
1297 This variable conditionally defines the I_DLFCN symbol, which
1298 indicates to the C program that <dlfcn.h> exists and should
1301 i_fcntl (i_fcntl.U):
1302 This variable controls the value of I_FCNTL (which tells
1303 the C program to include <fcntl.h>).
1305 i_float (i_float.U):
1306 This variable conditionally defines the I_FLOAT symbol, and indicates
1307 whether a C program may include <float.h> to get symbols like DBL_MAX
1308 or DBL_MIN, i.e. machine dependent floating point values.
1311 This variable conditionally defines the I_GDBM symbol, which
1312 indicates to the C program that <gdbm.h> exists and should
1316 This variable conditionally defines the I_GRP symbol, and indicates
1317 whether a C program should include <grp.h>.
1319 i_limits (i_limits.U):
1320 This variable conditionally defines the I_LIMITS symbol, and indicates
1321 whether a C program may include <limits.h> to get symbols like WORD_BIT
1324 i_locale (i_locale.U):
1325 This variable conditionally defines the I_LOCALE symbol,
1326 and indicates whether a C program should include <locale.h>.
1328 i_malloc (i_malloc.U):
1329 This variable conditionally defines the I_MALLOC symbol, and indicates
1330 whether a C program should include <malloc.h>.
1333 This variable conditionally defines the I_MATH symbol, and indicates
1334 whether a C program may include <math.h>.
1336 i_memory (i_memory.U):
1337 This variable conditionally defines the I_MEMORY symbol, and indicates
1338 whether a C program should include <memory.h>.
1341 This variable conditionally defines the I_NDBM symbol, which
1342 indicates to the C program that <ndbm.h> exists and should
1345 i_netdb (i_netdb.U):
1346 This variable conditionally defines the I_NETDB symbol, and indicates
1347 whether a C program should include <netdb.h>.
1349 i_neterrno (i_neterrno.U):
1350 This variable conditionally defines the I_NET_ERRNO symbol, which
1351 indicates to the C program that <net/errno.h> exists and should
1355 This variable conditionally defines I_NETINET_IN, which indicates
1356 to the C program that it should include <netinet/in.h>. Otherwise,
1357 you may try <sys/in.h>.
1360 This variable conditionally defines I_PWD, which indicates
1361 to the C program that it should include <pwd.h>.
1363 i_rpcsvcdbm (i_dbm.U):
1364 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1365 indicates to the C program that <rpcsvc/dbm.h> exists and should
1366 be included. Some System V systems might need this instead of <dbm.h>.
1369 This variable conditionally defines the I_SFIO symbol,
1370 and indicates whether a C program should include <sfio.h>.
1372 i_sgtty (i_termio.U):
1373 This variable conditionally defines the I_SGTTY symbol, which
1374 indicates to the C program that it should include <sgtty.h> rather
1377 i_stdarg (i_varhdr.U):
1378 This variable conditionally defines the I_STDARG symbol, which
1379 indicates to the C program that <stdarg.h> exists and should
1382 i_stddef (i_stddef.U):
1383 This variable conditionally defines the I_STDDEF symbol, which
1384 indicates to the C program that <stddef.h> exists and should
1387 i_stdlib (i_stdlib.U):
1388 This variable conditionally defines the I_STDLIB symbol, which
1389 indicates to the C program that <stdlib.h> exists and should
1392 i_string (i_string.U):
1393 This variable conditionally defines the I_STRING symbol, which
1394 indicates that <string.h> should be included rather than <strings.h>.
1396 i_sysdir (i_sysdir.U):
1397 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1398 whether a C program should include <sys/dir.h>.
1400 i_sysfile (i_sysfile.U):
1401 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1402 whether a C program should include <sys/file.h> to get R_OK and friends.
1404 i_sysfilio (i_sysioctl.U):
1405 This variable conditionally defines the I_SYS_FILIO symbol, which
1406 indicates to the C program that <sys/filio.h> exists and should
1407 be included in preference to <sys/ioctl.h>.
1410 This variable conditionally defines I_SYS_IN, which indicates
1411 to the C program that it should include <sys/in.h> instead of
1414 i_sysioctl (i_sysioctl.U):
1415 This variable conditionally defines the I_SYS_IOCTL symbol, which
1416 indicates to the C program that <sys/ioctl.h> exists and should
1419 i_sysndir (i_sysndir.U):
1420 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1421 whether a C program should include <sys/ndir.h>.
1423 i_sysparam (i_sysparam.U):
1424 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1425 whether a C program should include <sys/param.h>.
1427 i_sysresrc (i_sysresrc.U):
1428 This variable conditionally defines the I_SYS_RESOURCE symbol,
1429 and indicates whether a C program should include <sys/resource.h>.
1431 i_sysselct (i_sysselct.U):
1432 This variable conditionally defines I_SYS_SELECT, which indicates
1433 to the C program that it should include <sys/select.h> in order to
1434 get the definition of struct timeval.
1436 i_syssockio (i_sysioctl.U):
1437 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1438 C program that socket ioctl codes may be found in <sys/sockio.h>
1439 instead of <sys/ioctl.h>.
1441 i_sysstat (i_sysstat.U):
1442 This variable conditionally defines the I_SYS_STAT symbol,
1443 and indicates whether a C program should include <sys/stat.h>.
1445 i_systime (i_time.U):
1446 This variable conditionally defines I_SYS_TIME, which indicates
1447 to the C program that it should include <sys/time.h>.
1449 i_systimek (i_time.U):
1450 This variable conditionally defines I_SYS_TIME_KERNEL, which
1451 indicates to the C program that it should include <sys/time.h>
1452 with KERNEL defined.
1454 i_systimes (i_systimes.U):
1455 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1456 whether a C program should include <sys/times.h>.
1458 i_systypes (i_systypes.U):
1459 This variable conditionally defines the I_SYS_TYPES symbol,
1460 and indicates whether a C program should include <sys/types.h>.
1462 i_sysun (i_sysun.U):
1463 This variable conditionally defines I_SYS_UN, which indicates
1464 to the C program that it should include <sys/un.h> to get UNIX
1465 domain socket definitions.
1467 i_syswait (i_syswait.U):
1468 This variable conditionally defines I_SYS_WAIT, which indicates
1469 to the C program that it should include <sys/wait.h>.
1471 i_termio (i_termio.U):
1472 This variable conditionally defines the I_TERMIO symbol, which
1473 indicates to the C program that it should include <termio.h> rather
1476 i_termios (i_termio.U):
1477 This variable conditionally defines the I_TERMIOS symbol, which
1478 indicates to the C program that the POSIX <termios.h> file is
1482 This variable conditionally defines I_TIME, which indicates
1483 to the C program that it should include <time.h>.
1485 i_unistd (i_unistd.U):
1486 This variable conditionally defines the I_UNISTD symbol, and indicates
1487 whether a C program should include <unistd.h>.
1489 i_utime (i_utime.U):
1490 This variable conditionally defines the I_UTIME symbol, and indicates
1491 whether a C program should include <utime.h>.
1493 i_values (i_values.U):
1494 This variable conditionally defines the I_VALUES symbol, and indicates
1495 whether a C program may include <values.h> to get symbols like MAXLONG
1498 i_varargs (i_varhdr.U):
1499 This variable conditionally defines I_VARARGS, which indicates
1500 to the C program that it should include <varargs.h>.
1502 i_varhdr (i_varhdr.U):
1503 Contains the name of the header to be included to get va_dcl definition.
1504 Typically one of varargs.h or stdarg.h.
1506 i_vfork (i_vfork.U):
1507 This variable conditionally defines the I_VFORK symbol, and indicates
1508 whether a C program should include vfork.h.
1511 This variable must preceed the normal include path to get hte
1512 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
1513 Value can be "" or "/bsd43" on mips.
1515 installarchlib (archlib.U):
1516 This variable is really the same as archlibexp but may differ on
1517 those systems using AFS. For extra portability, only this variable
1518 should be used in makefiles.
1521 This variable is the same as binexp unless AFS is running in which case
1522 the user is explicitely prompted for it. This variable should always
1523 be used in your makefiles for maximum portability.
1525 installman1dir (man1dir.U):
1526 This variable is really the same as man1direxp, unless you are using
1527 AFS in which case it points to the read/write location whereas
1528 man1direxp only points to the read-only access location. For extra
1529 portability, you should only use this variable within your makefiles.
1531 installman3dir (man3dir.U):
1532 This variable is really the same as man3direxp, unless you are using
1533 AFS in which case it points to the read/write location whereas
1534 man3direxp only points to the read-only access location. For extra
1535 portability, you should only use this variable within your makefiles.
1537 installprivlib (privlib.U):
1538 This variable is really the same as privlibexp but may differ on
1539 those systems using AFS. For extra portability, only this variable
1540 should be used in makefiles.
1542 installscript (scriptdir.U):
1543 This variable is usually the same as scriptdirexp, unless you are on
1544 a system running AFS, in which case they may differ slightly. You
1545 should always use this variable within your makefiles for portability.
1547 installsitearch (sitearch.U):
1548 This variable is really the same as sitearchexp but may differ on
1549 those systems using AFS. For extra portability, only this variable
1550 should be used in makefiles.
1552 installsitelib (sitelib.U):
1553 This variable is really the same as sitelibexp but may differ on
1554 those systems using AFS. For extra portability, only this variable
1555 should be used in makefiles.
1557 intsize (intsize.U):
1558 This variable contains the value of the INTSIZE symbol, which
1559 indicates to the C program how many bytes there are in an int.
1561 known_extensions (Extensions.U):
1562 This variable holds a list of all XS extensions included in
1566 This variable contains a flag which will tell the C compiler and loader
1567 to produce a program running with a large memory model. It is up to
1568 the Makefile to use this.
1571 This variable indicates the program to be used to link
1572 libraries for dynamic loading. On some systems, it is 'ld'.
1573 On ELF systems, it should be $cc. Mostly, we'll try to respect
1574 the hint file setting.
1576 lddlflags (dlsrc.U):
1577 This variable contains any special flags that might need to be
1578 passed to $ld to create a shared library suitable for dynamic
1579 loading. It is up to the makefile to use it. For hpux, it
1580 should be -b. For sunos 4.1, it is empty.
1582 ldflags (ccflags.U):
1583 This variable contains any additional C loader flags desired by
1584 the user. It is up to the Makefile to use this.
1587 This is an old synonym for _a.
1590 This variable contains the location of the C library.
1592 libperl (libperl.U):
1593 The perl executable is obtained by linking perlmain.c with
1594 libperl, any static extensions (usually just DynaLoader),
1595 and any other libraries needed on this system. libperl
1596 is usually libperl.a, but can also be libperl.so.xxx if
1597 the user wishes to build a perl executable with a shared
1601 This variable holds the general path used to find libraries. It is
1602 intended to be used by other units.
1605 This variable holds the additional libraries we want to use.
1606 It is up to the Makefile to deal with it.
1608 libswanted (Myinit.U):
1609 This variable holds a list of all the libraries we want to
1610 search. The order is chosen to pick up the c library
1611 ahead of ucb or bsd libraries for SVR4.
1613 lkflags (ccflags.U):
1614 This variable contains any additional C partial linker flags desired by
1615 the user. It is up to the Makefile to use this.
1618 This variable holds the name of the command to make
1619 symbolic links (if they are supported). It can be used
1620 in the Makefile. It is either 'ln -s' or 'ln'
1622 locincpth (ccflags.U):
1623 This variable contains a list of additional directories to be
1624 searched by the compiler. The appropriate -I directives will
1625 be added to ccflags. This is intended to simplify setting
1626 local directories from the Configure command line.
1627 It's not much, but it parallels the loclibpth stuff in libpth.U.
1629 loclibpth (libpth.U):
1630 This variable holds the paths used to find local libraries. It is
1631 prepended to libpth, and is intended to be easily set from the
1634 longdblsize (d_longdbl.U):
1635 This variable contains the value of the LONG_DOUBLESIZE symbol, which
1636 indicates to the C program how many bytes there are in a long double,
1637 if this system supports long doubles.
1639 longlongsize (d_longlong.U):
1640 This variable contains the value of the LONGLONGSIZE symbol, which
1641 indicates to the C program how many bytes there are in a long long,
1642 if this system supports long long.
1644 longsize (intsize.U):
1645 This variable contains the value of the LONGSIZE symbol, which
1646 indicates to the C program how many bytes there are in a long.
1648 lseektype (lseektype.U):
1649 This variable defines lseektype to be something like off_t, long,
1650 or whatever type is used to declare lseek offset's type in the
1651 kernel (which also appears to be lseek's return type).
1653 make_set_make (make.U):
1654 Some versions of 'make' set the variable MAKE. Others do not.
1655 This variable contains the string to be included in Makefile.SH
1656 so that MAKE is set if needed, and not if not needed.
1657 Possible values are:
1658 make_set_make='#' # If your make program handles this for you,
1659 make_set_make="MAKE=$make" # if it doesn't.
1660 I used a comment character so that we can distinguish a
1661 'set' value (from a previous config.sh or Configure -D option)
1662 from an uncomputed value.
1664 mallocobj (mallocsrc.U):
1665 This variable contains the name of the malloc.o that this package
1666 generates, if that malloc.o is preferred over the system malloc.
1667 Otherwise the value is null. This variable is intended for generating
1668 Makefiles. See mallocsrc.
1670 mallocsrc (mallocsrc.U):
1671 This variable contains the name of the malloc.c that comes with
1672 the package, if that malloc.c is preferred over the system malloc.
1673 Otherwise the value is null. This variable is intended for generating
1676 malloctype (mallocsrc.U):
1677 This variable contains the kind of ptr returned by malloc and realloc.
1679 man1dir (man1dir.U):
1680 This variable contains the name of the directory in which manual
1681 source pages are to be put. It is the responsibility of the
1682 Makefile.SH to get the value of this into the proper command.
1683 You must be prepared to do the ~name expansion yourself.
1685 man1direxp (man1dir.U):
1686 This variable is the same as the man1dir variable, but is filename
1687 expanded at configuration time, for convenient use in makefiles.
1689 man1ext (man1dir.U):
1690 This variable contains the extension that the manual page should
1691 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
1694 man3dir (man3dir.U):
1695 This variable contains the name of the directory in which manual
1696 source pages are to be put. It is the responsibility of the
1697 Makefile.SH to get the value of this into the proper command.
1698 You must be prepared to do the ~name expansion yourself.
1700 man3direxp (man3dir.U):
1701 This variable is the same as the man3dir variable, but is filename
1702 expanded at configuration time, for convenient use in makefiles.
1704 man3ext (man3dir.U):
1705 This variable contains the extension that the manual page should
1706 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
1710 This variable contains a flag which will tell the C compiler and loader
1711 to produce a program running with a medium memory model. If the
1712 medium model is not supported, contains the flag to produce large
1713 model programs. It is up to the Makefile to use this.
1715 mips_type (usrinc.U):
1716 This variable holds the environment type for the mips system.
1717 Possible values are "BSD 4.3" and "System V".
1720 This variable contains the list of memory models supported by this
1721 system. Possible component values are none, split, unsplit, small,
1722 medium, large, and huge. The component values are space separated.
1724 modetype (modetype.U):
1725 This variable defines modetype to be something like mode_t,
1726 int, unsigned short, or whatever type is used to declare file
1727 modes for system calls.
1729 myarchname (archname.U):
1730 This variable holds the architecture name computed by Configure in
1731 a previous run. It is not intended to be perused by any user and
1732 should never be set in a hint file.
1734 mydomain (myhostname.U):
1735 This variable contains the eventual value of the MYDOMAIN symbol,
1736 which is the domain of the host the program is going to run on.
1737 The domain must be appended to myhostname to form a complete host name.
1738 The dot comes with mydomain, and need not be supplied by the program.
1740 myhostname (myhostname.U):
1741 This variable contains the eventual value of the MYHOSTNAME symbol,
1742 which is the name of the host the program is going to run on.
1743 The domain is not kept with hostname, but must be gotten from mydomain.
1744 The dot comes with mydomain, and need not be supplied by the program.
1746 myuname (Oldconfig.U):
1747 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
1748 pseudo variables assignments in the output are stripped, thank you. The
1749 whole thing is then lower-cased.
1752 This variable contains the -n flag if that is what causes the echo
1753 command to suppress newline. Otherwise it is null. Correct usage is
1754 $echo $n "prompt for a question: $c".
1756 netdb_hlen_type (netdbtype.U):
1757 This variable holds the type used for the 2nd argument to
1758 gethostbyaddr(). Usually, this is int or size_t or unsigned.
1759 This is only useful if you have gethostbyaddr(), naturally.
1761 netdb_host_type (netdbtype.U):
1762 This variable holds the type used for the 1st argument to
1763 gethostbyaddr(). Usually, this is char * or void *, possibly
1764 with or without a const prefix.
1765 This is only useful if you have gethostbyaddr(), naturally.
1767 netdb_name_type (netdbtype.U):
1768 This variable holds the type used for the argument to
1769 gethostbyname(). Usually, this is char * or const char *.
1770 This is only useful if you have gethostbyname(), naturally.
1772 netdb_net_type (netdbtype.U):
1773 This variable holds the type used for the 1st argument to
1774 getnetbyaddr(). Usually, this is int or long.
1775 This is only useful if you have getnetbyaddr(), naturally.
1778 This variable holds the options that may be necessary for nm.
1780 nm_so_opt (usenm.U):
1781 This variable holds the options that may be necessary for nm
1782 to work on a shared library but that can not be used on an
1783 archive library. Currently, this is only used by Linux, where
1784 nm --dynamic is *required* to get symbols from an ELF library which
1785 has been stripped, but nm --dynamic is *fatal* on an archive library.
1786 Maybe Linux should just always set usenm=false.
1788 nonxs_ext (Extensions.U):
1789 This variable holds a list of all non-xs extensions included
1790 in the package. All of them will be built.
1792 o_nonblock (nblock_io.U):
1793 This variable bears the symbol value to be used during open() or fcntl()
1794 to turn on non-blocking I/O for a file descriptor. If you wish to switch
1795 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
1796 but that is only supported by some devices.
1799 This is an old synonym for _o.
1801 optimize (ccflags.U):
1802 This variable contains any optimizer/debugger flag that should be used.
1803 It is up to the Makefile to use it.
1805 orderlib (orderlib.U):
1806 This variable is "true" if the components of libraries must be ordered
1807 (with `lorder $* | tsort`) before placing them in an archive. Set to
1808 "false" if ranlib or ar can generate random libraries.
1810 osname (Oldconfig.U):
1811 This variable contains the operating system name (e.g. sunos,
1812 solaris, hpux, etc.). It can be useful later on for setting
1813 defaults. Any spaces are replaced with underscores. It is set
1814 to a null string if we can't figure it out.
1816 osvers (Oldconfig.U):
1817 This variable contains the operating system version (e.g.
1818 4.1.3, 5.2, etc.). It is primarily used for helping select
1819 an appropriate hints file, but might be useful elsewhere for
1820 setting defaults. It is set to '' if we can't figure it out.
1821 We try to be flexible about how much of the version number
1822 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
1823 same for this package, hints files might just be os_4.0 or
1824 os_4.1, etc., not keeping separate files for each little release.
1826 package (package.U):
1827 This variable contains the name of the package being constructed.
1828 It is primarily intended for the use of later Configure units.
1831 This variable contains the name of the preferred pager on the system.
1832 Usual values are (the full pathnames of) more, less, pg, or cat.
1835 This variable contains a command that produces the text of the
1836 /etc/passwd file. This is normally "cat /etc/passwd", but can be
1837 "ypcat passwd" when NIS is used.
1839 patchlevel (patchlevel.U):
1840 The patchlevel level of this package.
1841 The value of patchlevel comes from the patchlevel.h file.
1844 This is an old synonym for p_ in Head.U, the character
1845 used to separate elements in the command shell search PATH.
1847 perladmin (perladmin.U):
1848 Electronic mail address of the perl5 administrator.
1850 perlpath (perlpath.U):
1851 This variable contains the eventual value of the PERLPATH symbol,
1852 which contains the name of the perl interpreter to be used in
1853 shell scripts and in the "eval 'exec'" idiom.
1855 phostname (myhostname.U):
1856 This variable contains the eventual value of the PHOSTNAME symbol,
1857 which is a command that can be fed to popen() to get the host name.
1858 The program should probably not presume that the domain is or isn't
1861 pidtype (pidtype.U):
1862 This variable defines PIDTYPE to be something like pid_t, int,
1863 ushort, or whatever type is used to declare process ids in the kernel.
1866 Holds the private path used by Configure to find out the libraries.
1867 Its value is prepend to libpth. This variable takes care of special
1868 machines, like the mips. Usually, it should be empty.
1871 This variable holds the name of the directory below which the
1872 user will install the package. Usually, this is /usr/local, and
1873 executables go in /usr/local/bin, library stuff in /usr/local/lib,
1874 man pages in /usr/local/man, etc. It is only used to set defaults
1875 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
1877 prefixexp (prefix.U):
1878 This variable holds the full absolute path of the directory below
1879 which the user will install the package. Derived from prefix.
1881 privlib (privlib.U):
1882 This variable contains the eventual value of the PRIVLIB symbol,
1883 which is the name of the private library for this package. It may
1884 have a ~ on the front. It is up to the makefile to eventually create
1885 this directory while performing installation (with ~ substitution).
1887 privlibexp (privlib.U):
1888 This variable is the ~name expanded version of privlib, so that you
1889 may use it directly in Makefiles or shell scripts.
1891 prototype (prototype.U):
1892 This variable holds the eventual value of CAN_PROTOTYPE, which
1893 indicates the C compiler can handle funciton prototypes.
1895 ptrsize (ptrsize.U):
1896 This variable contains the value of the PTRSIZE symbol, which
1897 indicates to the C program how many bytes there are in a pointer.
1899 randbits (randbits.U):
1900 This variable contains the eventual value of the RANDBITS symbol,
1901 which indicates to the C program how many bits of random number
1902 the rand() function produces.
1904 ranlib (orderlib.U):
1905 This variable is set to the pathname of the ranlib program, if it is
1906 needed to generate random libraries. Set to ":" if ar can generate
1907 random libraries or if random libraries are not supported
1909 rd_nodata (nblock_io.U):
1910 This variable holds the return code from read() when no data is
1911 present. It should be -1, but some systems return 0 when O_NDELAY is
1912 used, which is a shame because you cannot make the difference between
1913 no data and an EOF.. Sigh!
1916 This variable contains 'true' or 'false' depending whether the
1917 nm extraction should be performed or not, according to the value
1918 of usenm and the flags on the Configure command line.
1920 scriptdir (scriptdir.U):
1921 This variable holds the name of the directory in which the user wants
1922 to put publicly scripts for the package in question. It is either
1923 the same directory as for binaries, or a special one that can be
1924 mounted across different architectures, like /usr/share. Programs
1925 must be prepared to deal with ~name expansion.
1927 scriptdirexp (scriptdir.U):
1928 This variable is the same as scriptdir, but is filename expanded
1929 at configuration time, for programs not wanting to bother with it.
1931 selecttype (selecttype.U):
1932 This variable holds the type used for the 2nd, 3rd, and 4th
1933 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
1934 is defined, and 'int *' otherwise. This is only useful if you
1935 have select(), naturally.
1938 This variable contains the full pathname of the shell used
1939 on this system to execute Bourne shell scripts. Usually, this will be
1940 /bin/sh, though it's possible that some systems will have /bin/ksh,
1941 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
1943 This unit comes before Options.U, so you can't set sh with a -D
1944 option, though you can override this (and startsh)
1945 with -O -Dsh=/bin/whatever -Dstartsh=whatever
1947 sharpbang (spitshell.U):
1948 This variable contains the string #! if this system supports that
1951 shmattype (d_shmat.U):
1952 This symbol contains the type of pointer returned by shmat().
1953 It can be 'void *' or 'char *'.
1955 shortsize (intsize.U):
1956 This variable contains the value of the SHORTSIZE symbol which
1957 indicates to the C program how many bytes there are in a short.
1959 shrpenv (libperl.U):
1960 If the user builds a shared libperl.so, then we need to tell the
1961 'perl' executable where it will be able to find the installed libperl.so.
1962 One way to do this on some systems is to set the environment variable
1963 LD_RUN_PATH to the directory that will be the final location of the
1964 shared libperl.so. The makefile can use this with something like
1965 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
1967 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
1970 See the main perl Makefile.SH for actual working usage.
1971 Alternatively, we might be able to use a command line option such
1972 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
1973 $archlibexp/CORE (Linux).
1975 shsharp (spitshell.U):
1976 This variable tells further Configure units whether your sh can
1979 sig_name (sig_name.U):
1980 This variable holds the signal names, space separated. The leading
1981 SIG in signal name is removed. A ZERO is prepended to the
1982 list. This is currently not used.
1984 sig_name_init (sig_name.U):
1985 This variable holds the signal names, enclosed in double quotes and
1986 separated by commas, suitable for use in the SIG_NAME definition
1987 below. A "ZERO" is prepended to the list, and the list is
1988 terminated with a plain 0. The leading SIG in signal names
1989 is removed. See sig_num.
1991 sig_num (sig_name.U):
1992 This variable holds the signal numbers, comma separated. A 0 is
1993 prepended to the list (corresponding to the fake SIGZERO), and
1994 the list is terminated with a 0. Those numbers correspond to
1995 the value of the signal listed in the same place within the
1998 signal_t (d_voidsig.U):
1999 This variable holds the type of the signal handler (void or int).
2001 sitearch (sitearch.U):
2002 This variable contains the eventual value of the SITEARCH symbol,
2003 which is the name of the private library for this package. It may
2004 have a ~ on the front. It is up to the makefile to eventually create
2005 this directory while performing installation (with ~ substitution).
2007 sitearchexp (sitearch.U):
2008 This variable is the ~name expanded version of sitearch, so that you
2009 may use it directly in Makefiles or shell scripts.
2011 sitelib (sitelib.U):
2012 This variable contains the eventual value of the SITELIB symbol,
2013 which is the name of the private library for this package. It may
2014 have a ~ on the front. It is up to the makefile to eventually create
2015 this directory while performing installation (with ~ substitution).
2017 sitelibexp (sitelib.U):
2018 This variable is the ~name expanded version of sitelib, so that you
2019 may use it directly in Makefiles or shell scripts.
2021 sizetype (sizetype.U):
2022 This variable defines sizetype to be something like size_t,
2023 unsigned long, or whatever type is used to declare length
2024 parameters for string functions.
2027 This variable contains a flag which will tell the C compiler and loader
2028 to produce a program running with a small memory model. It is up to
2029 the Makefile to use this.
2032 This variable holds the extension used to identify shared libraries
2033 (also known as shared objects) on the system. Usually set to 'so'.
2035 sockethdr (d_socket.U):
2036 This variable has any cpp -I flags needed for socket support.
2038 socketlib (d_socket.U):
2039 This variable has the names of any libraries needed for socket support.
2041 spackage (package.U):
2042 This variable contains the name of the package being constructed,
2043 with the first letter uppercased, i.e. suitable for starting
2046 spitshell (spitshell.U):
2047 This variable contains the command necessary to spit out a runnable
2048 shell on this system. It is either cat or a grep -v for # comments.
2051 This variable contains a flag which will tell the C compiler and loader
2052 to produce a program that will run in separate I and D space, for those
2053 machines that support separation of instruction and data space. It is
2054 up to the Makefile to use this.
2057 This variable holds the path to the package source. It is up to
2058 the Makefile to use this variable and set VPATH accordingly to
2059 find the sources remotely.
2061 ssizetype (ssizetype.U):
2062 This variable defines ssizetype to be something like ssize_t,
2063 long or int. It is used by functions that return a count
2064 of bytes or an error condition. It must be a signed type.
2065 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2067 startperl (startperl.U):
2068 This variable contains the string to put on the front of a perl
2069 script to make sure (hopefully) that it runs with perl and not some
2070 shell. Of course, that leading line must be followed by the classical
2072 eval 'exec perl -S $0 ${1+"$@"}'
2073 if $running_under_some_shell;
2074 to guarantee perl startup should the shell execute the script. Note
2075 that this magic incatation is not understood by csh.
2077 startsh (startsh.U):
2078 This variable contains the string to put on the front of a shell
2079 script to make sure (hopefully) that it runs with sh and not some
2082 static_ext (Extensions.U):
2083 This variable holds a list of XS extension files we want to
2084 link statically into the package. It is used by Makefile.
2086 stdchar (stdchar.U):
2087 This variable conditionally defines STDCHAR to be the type of char
2088 used in stdio.h. It has the values "unsigned char" or "char".
2090 stdio_base (d_stdstdio.U):
2091 This variable defines how, given a FILE pointer, fp, to access the
2092 _base field (or equivalent) of stdio.h's FILE structure. This will
2093 be used to define the macro FILE_base(fp).
2095 stdio_bufsiz (d_stdstdio.U):
2096 This variable defines how, given a FILE pointer, fp, to determine
2097 the number of bytes store in the I/O buffer pointer to by the
2098 _base field (or equivalent) of stdio.h's FILE structure. This will
2099 be used to define the macro FILE_bufsiz(fp).
2101 stdio_cnt (d_stdstdio.U):
2102 This variable defines how, given a FILE pointer, fp, to access the
2103 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2104 be used to define the macro FILE_cnt(fp).
2106 stdio_filbuf (d_stdstdio.U):
2107 This variable defines how, given a FILE pointer, fp, to tell
2108 stdio to refill it's internal buffers (?). This will
2109 be used to define the macro FILE_filbuf(fp).
2111 stdio_ptr (d_stdstdio.U):
2112 This variable defines how, given a FILE pointer, fp, to access the
2113 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2114 be used to define the macro FILE_ptr(fp).
2116 strings (i_string.U):
2117 This variable holds the full path of the string header that will be
2118 used. Typically /usr/include/string.h or /usr/include/strings.h.
2120 subversion (patchlevel.U):
2121 The subversion level of this package.
2122 The value of subversion comes from the patchlevel.h file.
2123 This is unique to perl.
2126 This variable holds the place where the manual is located on this
2127 system. It is not the place where the user wants to put his manual
2128 pages. Rather it is the place where Configure may look to find manual
2129 for unix commands (section 1 of the manual usually). See mansrc.
2131 timeincl (i_time.U):
2132 This variable holds the full path of the included time header(s).
2134 timetype (d_time.U):
2135 This variable holds the type returned by time(). It can be long,
2136 or time_t on BSD sites (in which case <sys/types.h> should be
2137 included). Anyway, the type Time_t should be used.
2139 uidtype (uidtype.U):
2140 This variable defines Uid_t to be something like uid_t, int,
2141 ushort, or whatever type is used to declare user ids in the kernel.
2144 This variable indicates if the the system supports dynamic
2145 loading of some sort. See also dlsrc and dlobj.
2147 usemymalloc (mallocsrc.U):
2148 This variable contains y if the malloc that comes with this package
2149 is desired over the system's version of malloc. People often include
2150 special versions of malloc for effiency, but such versions are often
2151 less portable. See also mallocsrc and mallocobj.
2152 If this is 'y', then -lmalloc is removed from $libs.
2155 This variable contains 'true' or 'false' depending whether the
2156 nm extraction is wanted or not.
2158 useopcode (Extensions.U):
2159 This variable holds either 'true' or 'false' to indicate
2160 whether the Opcode extension should be used. The sole
2161 use for this currently is to allow an easy mechanism
2162 for users to skip the Opcode extension from the Configure
2165 useperlio (useperlio.U):
2166 This variable conditionally defines the USE_PERLIO symbol,
2167 and indicates that the PerlIO abstraction should be
2170 useposix (Extensions.U):
2171 This variable holds either 'true' or 'false' to indicate
2172 whether the POSIX extension should be used. The sole
2173 use for this currently is to allow an easy mechanism
2174 for hints files to indicate that POSIX will not compile
2175 on a particular system.
2178 This variable is set to true when the user agrees to use sfio.
2179 It is set to false when sfio is not available or when the user
2180 explicitely requests not to use sfio. It is here primarily so
2181 that command-line settings can override the auto-detection of
2182 d_sfio without running into a "WHOA THERE".
2184 useshrplib (libperl.U):
2185 This variable is set to 'yes' if the user wishes
2186 to build a shared libperl, and 'no' otherwise.
2188 usethreads (usethreads.U):
2189 This variable conditionally defines the USE_THREADS symbol,
2190 and indicates that Perl should be built to use threads.
2192 usevfork (d_vfork.U):
2193 This variable is set to true when the user accepts to use vfork.
2194 It is set to false when no vfork is available or when the user
2195 explicitely requests not to use vfork.
2198 This variable holds the path of the include files, which is
2199 usually /usr/include. It is mainly used by other Configure units.
2201 version (patchlevel.U):
2202 The full version number of this package. This combines
2203 baserev, patchlevel, and subversion to get the full
2204 version number, including any possible subversions. Care
2205 is taken to use the C locale in order to get something
2206 like 5.004 instead of 5,004. This is unique to perl.
2208 voidflags (voidflags.U):
2209 This variable contains the eventual value of the VOIDFLAGS symbol,
2210 which indicates how much support of the void type is given by this
2211 compiler. See VOIDFLAGS for more info.