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.
39 This variable holds the name of the directory in which the user wants
40 to put architecture-dependent public library files for $package.
41 It is most often a local directory such as /usr/local/lib.
42 Programs using this variable must be prepared to deal
43 with filename expansion.
45 archlibexp (archlib.U):
46 This variable is the same as the archlib variable, but is
47 filename expanded at configuration time, for convenient use.
49 archname (archname.U):
50 This variable is a short name to characterize the current
51 architecture. It is used mainly to construct the default archlib.
54 This variable defines any additional objects that must be linked
55 in with the program on this architecture. On unix, it is usually
56 empty. It is typically used to include emulations of unix calls
57 or other facilities. For perl on OS/2, for example, this would
61 The base revision level of this package, from the .package file.
64 This variable holds the name of the directory in which the user wants
65 to put publicly executable images for the package in question. It
66 is most often a local directory such as /usr/local/bin. Programs using
67 this variable must be prepared to deal with ~name substitution.
70 This is the same as the bin variable, but is filename expanded at
71 configuration time, for use in your makefiles.
73 byteorder (byteorder.U):
74 This variable holds the byte order. In the following, larger digits
75 indicate more significance. The variable byteorder is either 4321
76 on a big-endian machine, or 1234 on a little-endian, or 87654321
77 on a Cray ... or 3412 with weird order !
80 This variable contains the \c string if that is what causes the echo
81 command to suppress newline. Otherwise it is null. Correct usage is
82 $echo $n "prompt for a question: $c".
84 castflags (d_castneg.U):
85 This variable contains a flag that precise difficulties the
86 compiler has casting odd floating values to unsigned long:
89 2 = couldn't cast >= 0x80000000
90 4 = couldn't cast in argument expression list
93 This variable holds the name of a command to execute a C compiler which
94 can resolve multiple global references that happen to have the same
95 name. Usual values are "cc", "Mcc", "cc -M", and "gcc".
98 This variable contains any special flags that might need to be
99 passed with cc -c to compile modules to be used to create a shared
100 library that will be used for dynamic loading. For hpux, this
101 should be +z. It is up to the makefile to use it.
104 This variable contains any special flags that might need to be
105 passed to cc to link with a shared library for dynamic loading.
106 It is up to the makefile to use it. For sunos 4.1, it should
110 This variable contains any additional C compiler flags desired by
111 the user. It is up to the Makefile to use this.
114 Login name of the person who ran the Configure script and answered the
115 questions. This is used to tag both config.sh and config_h.SH.
117 cf_email (cf_email.U):
118 Electronic mail address of the person who ran Configure. This can be
119 used by units that require the user's e-mail, like MailList.U.
122 Holds the output of the "date" command when the configuration file was
123 produced. This is used to tag both config.sh and config_h.SH.
125 clocktype (d_times.U):
126 This variable holds the type returned by times(). It can be long,
127 or clock_t on BSD sites (in which case <sys/types.h> should be
130 contains (contains.U):
131 This variable holds the command to do a grep with a proper return
132 status. On most sane systems it is simply "grep". On insane systems
133 it is a grep followed by a cat followed by a test. This variable
134 is primarily for the use of other Configure units.
136 cpp_stuff (cpp_stuff.U):
137 This variable contains an identification of the catenation mechanism
138 used by the C preprocessor.
140 cppflags (ccflags.U):
141 This variable holds the flags that will be passed to the C pre-
142 processor. It is up to the Makefile to use it.
144 cpplast (cppstdin.U):
145 This variable has the same functionality as cppminus, only it applies to
146 cpprun and not cppstdin.
148 cppminus (cppstdin.U):
149 This variable contains the second part of the string which will invoke
150 the C preprocessor on the standard input and produce to standard
151 output. This variable will have the value "-" if cppstdin needs a minus
152 to specify standard input, otherwise the value is "".
155 This variable contains the command which will invoke a C preprocessor
156 on standard input and put the output to stdout. It is guaranteed not
157 to be a wrapper and may be a null string if no preprocessor can be
158 made directly available. This preprocessor might be different from the
159 one used by the C compiler. Don't forget to append cpplast after the
160 preprocessor options.
162 cppstdin (cppstdin.U):
163 This variable contains the command which will invoke the C
164 preprocessor on standard input and put the output to stdout.
165 It is primarily used by other Configure units that ask about
166 preprocessor symbols.
168 cryptlib (d_crypt.U):
169 This variable holds -lcrypt or the path to a libcrypt.a archive if
170 the crypt() function is not defined in the standard C library. It is
171 up to the Makefile to use this.
173 d_Gconvert (d_gconvert.U):
174 This variable holds what Gconvert is defined as to convert
175 floating point numbers into strings. It could be 'gconvert'
176 or a more complex macro emulating gconvert with gcvt() or sprintf.
178 d_access (d_access.U):
179 This variable conditionally defines HAS_ACCESS if the access() system
180 call is available to check for access permissions using real IDs.
183 This variable conditionally defines the HAS_ALARM symbol, which
184 indicates to the C program that the alarm() routine is available.
186 d_archlib (archlib.U):
187 This variable conditionally defines ARCHLIB to hold the pathname
188 of architecture-dependent library files for $package. If
189 $archlib is the same as $privlib, then this is set to undef.
191 d_attribut (d_attribut.U):
192 This variable conditionally defines HASATTRIBUTE, which
193 indicates the C compiler can check for function attributes,
194 such as printf formats.
197 This variable conditionally defines the HAS_BCMP symbol if
198 the bcmp() routine is available to compare strings.
201 This variable conditionally defines the HAS_BCOPY symbol if
202 the bcopy() routine is available to copy strings.
205 This symbol conditionally defines the symbol BSD when running on a
208 d_bsdgetpgrp (d_getpgrp.U):
209 This variable conditionally defines USE_BSD_GETPGRP if
210 getpgrp needs one arguments whereas USG one needs none.
212 d_bsdsetpgrp (d_setpgrp.U):
213 This variable conditionally defines USE_BSD_SETPGRP if
214 setpgrp needs two arguments whereas USG one needs none.
215 See also d_setpgid for a POSIX interface.
218 This variable conditionally defines the HAS_BZERO symbol if
219 the bzero() routine is available to set memory to 0.
221 d_casti32 (d_casti32.U):
222 This variable conditionally defines CASTI32, which indicates
223 whether the C compiler can cast large floats to 32-bit ints.
225 d_castneg (d_castneg.U):
226 This variable conditionally defines CASTNEG, which indicates
227 wether the C compiler can cast negative float to unsigned.
229 d_charvspr (d_vprintf.U):
230 This variable conditionally defines CHARVSPRINTF if this system
231 has vsprintf returning type (char*). The trend seems to be to
232 declare it as "int vsprintf()".
235 This variable conditionally defines the HAS_CHOWN symbol, which
236 indicates to the C program that the chown() routine is available.
238 d_chroot (d_chroot.U):
239 This variable conditionally defines the HAS_CHROOT symbol, which
240 indicates to the C program that the chroot() routine is available.
242 d_chsize (d_chsize.U):
243 This variable conditionally defines the CHSIZE symbol, which
244 indicates to the C program that the chsize() routine is available
245 to truncate files. You might need a -lx to get this routine.
247 d_closedir (d_closedir.U):
248 This variable conditionally defines HAS_CLOSEDIR if closedir() is
252 This variable conditionally defines the HASCONST symbol, which
253 indicates to the C program that this C compiler knows about the
257 This variable conditionally defines the CRYPT symbol, which
258 indicates to the C program that the crypt() routine is available
259 to encrypt passwords and the like.
262 This variable conditionally defines the CSH symbol, which
263 indicates to the C program that the C-shell exists.
265 d_cuserid (d_cuserid.U):
266 This variable conditionally defines the HAS_CUSERID symbol, which
267 indicates to the C program that the cuserid() routine is available
268 to get character login names.
270 d_dbl_dig (d_dbl_dig.U):
271 This variable conditionally defines d_dbl_dig if this system's
272 header files provide DBL_DIG, which is the number of significant
273 digits in a double precision number.
275 d_difftime (d_difftime.U):
276 This variable conditionally defines the HAS_DIFFTIME symbol, which
277 indicates to the C program that the difftime() routine is available.
279 d_dirnamlen (i_dirent.U):
280 This variable conditionally defines DIRNAMLEN, which indicates
281 to the C program that the length of directory entry names is
282 provided by a d_namelen field.
284 d_dlerror (d_dlerror.U):
285 This variable conditionally defines the HAS_DLERROR symbol, which
286 indicates to the C program that the dlerror() routine is available.
288 d_dlopen (d_dlopen.U):
289 This variable conditionally defines the HAS_DLOPEN symbol, which
290 indicates to the C program that the dlopen() routine is available.
292 d_dlsymun (d_dlsymun.U):
293 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
294 indicates that we need to prepend an underscore to the symbol
295 name before calling dlsym().
297 d_dosuid (d_dosuid.U):
298 This variable conditionally defines the symbol DOSUID, which
299 tells the C program that it should insert setuid emulation code
300 on hosts which have setuid #! scripts disabled.
303 This variable conditionally defines HAS_DUP2 if dup2() is
304 available to duplicate file descriptors.
306 d_endhent (d_endhent.U):
307 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
308 available to close whatever was being used for host queries.
310 d_endnent (d_endnent.U):
311 This variable conditionally defines HAS_ENDNETENT if endnetent() is
312 available to close whatever was being used for network queries.
314 d_endpent (d_endpent.U):
315 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
316 available to close whatever was being used for protocol queries.
318 d_endsent (d_endsent.U):
319 This variable conditionally defines HAS_ENDSERVENT if endservent() is
320 available to close whatever was being used for service queries.
322 d_eofnblk (nblock_io.U):
323 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
324 when reading from a non-blocking I/O source.
327 This variable conditionally defines the symbols EUNICE and VAX, which
328 alerts the C program that it must deal with ideosyncracies of VMS.
330 d_fchmod (d_fchmod.U):
331 This variable conditionally defines the HAS_FCHMOD symbol, which
332 indicates to the C program that the fchmod() routine is available
333 to change mode of opened files.
335 d_fchown (d_fchown.U):
336 This variable conditionally defines the HAS_FCHOWN symbol, which
337 indicates to the C program that the fchown() routine is available
338 to change ownership of opened files.
341 This variable conditionally defines the HAS_FCNTL symbol, and indicates
342 whether the fcntl() function exists
344 d_fd_macros (d_fd_set.U):
345 This variable contains the eventual value of the HAS_FD_MACROS symbol,
346 which indicates if your C compiler knows about the macros which
347 manipulate an fd_set.
349 d_fd_set (d_fd_set.U):
350 This variable contains the eventual value of the HAS_FD_SET symbol,
351 which indicates if your C compiler knows about the fd_set typedef.
353 d_fds_bits (d_fd_set.U):
354 This variable contains the eventual value of the HAS_FDS_BITS symbol,
355 which indicates if your fd_set typedef contains the fds_bits member.
356 If you have an fd_set typedef, but the dweebs who installed it did
357 a half-fast job and neglected to provide the macros to manipulate
358 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
360 d_fgetpos (d_fgetpos.U):
361 This variable conditionally defines HAS_FGETPOS if fgetpos() is
362 available to get the file position indicator.
364 d_flexfnam (d_flexfnam.U):
365 This variable conditionally defines the FLEXFILENAMES symbol, which
366 indicates that the system supports filenames longer than 14 characters.
369 This variable conditionally defines HAS_FLOCK if flock() is
370 available to do file locking.
373 This variable conditionally defines the HAS_FORK symbol, which
374 indicates to the C program that the fork() routine is available.
376 d_fpathconf (d_pathconf.U):
377 This variable conditionally defines the HAS_FPATHCONF symbol, which
378 indicates to the C program that the pathconf() routine is available
379 to determine file-system related limits and options associated
380 with a given open file descriptor.
382 d_fsetpos (d_fsetpos.U):
383 This variable conditionally defines HAS_FSETPOS if fsetpos() is
384 available to set the file position indicator.
387 This variable conditionally defines the HAS_FTIME symbol, which indicates
388 that the ftime() routine exists. The ftime() routine is basically
389 a sub-second accuracy clock.
391 d_getgrps (d_getgrps.U):
392 This variable conditionally defines the HAS_GETGROUPS symbol, which
393 indicates to the C program that the getgroups() routine is available
394 to get the list of process groups.
396 d_gethbyaddr (d_gethbyad.U):
397 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
398 indicates to the C program that the gethostbyaddr() routine is available
399 to look up hosts by their IP addresses.
401 d_gethbyname (d_gethbynm.U):
402 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
403 indicates to the C program that the gethostbyname() routine is available
404 to look up host names in some data base or other.
406 d_gethent (d_gethent.U):
407 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
408 available to look up host names in some data base or another.
410 d_gethname (d_gethname.U):
411 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
412 indicates to the C program that the gethostname() routine may be
413 used to derive the host name.
415 d_gethostprotos (d_gethostprotos.U):
416 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
417 which indicates to the C program that <netdb.h> supplies
418 prototypes for the various gethost*() functions.
419 See also netdbtype.U for probing for various netdb types.
421 d_getlogin (d_getlogin.U):
422 This variable conditionally defines the HAS_GETLOGIN symbol, which
423 indicates to the C program that the getlogin() routine is available
424 to get the login name.
426 d_getnbyaddr (d_getnbyad.U):
427 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
428 indicates to the C program that the getnetbyaddr() routine is available
429 to look up networks by their IP addresses.
431 d_getnbyname (d_getnbynm.U):
432 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
433 indicates to the C program that the getnetbyname() routine is available
434 to look up networks by their names.
436 d_getnent (d_getnent.U):
437 This variable conditionally defines HAS_GETNETENT if getnetent() is
438 available to look up network names in some data base or another.
440 d_getnetprotos (d_getnetprotos.U):
441 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
442 which indicates to the C program that <netdb.h> supplies
443 prototypes for the various getnet*() functions.
444 See also netdbtype.U for probing for various netdb types.
446 d_getpbyname (d_getprotby.U):
447 This variable conditionally defines the HAS_GETPROTOBYNAME
448 symbol, which indicates to the C program that the
449 getprotobyname() routine is available to look up protocols
452 d_getpbynumber (d_getprotby.U):
453 This variable conditionally defines the HAS_GETPROTOBYNUMBER
454 symbol, which indicates to the C program that the
455 getprotobynumber() routine is available to look up protocols
458 d_getpent (d_getpent.U):
459 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
460 available to look up protocols in some data base or another.
462 d_getpgid (d_getpgid.U):
463 This variable conditionally defines the HAS_GETPGID symbol, which
464 indicates to the C program that the getpgid(pid) function
465 is available to get the process group id.
467 d_getpgrp2 (d_getpgrp2.U):
468 This variable conditionally defines the HAS_GETPGRP2 symbol, which
469 indicates to the C program that the getpgrp2() (as in DG/UX) routine
470 is available to get the current process group.
472 d_getpgrp (d_getpgrp.U):
473 This variable conditionally defines HAS_GETPGRP if getpgrp() is
474 available to get the current process group.
476 d_getppid (d_getppid.U):
477 This variable conditionally defines the HAS_GETPPID symbol, which
478 indicates to the C program that the getppid() routine is available
479 to get the parent process ID.
481 d_getprior (d_getprior.U):
482 This variable conditionally defines HAS_GETPRIORITY if getpriority()
483 is available to get a process's priority.
485 d_getprotoprotos (d_getprotoprotos.U):
486 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
487 which indicates to the C program that <netdb.h> supplies
488 prototypes for the various getproto*() functions.
489 See also netdbtype.U for probing for various netdb types.
491 d_getsbyname (d_getsrvby.U):
492 This variable conditionally defines the HAS_GETSERVBYNAME
493 symbol, which indicates to the C program that the
494 getservbyname() routine is available to look up services
497 d_getsbyport (d_getsrvby.U):
498 This variable conditionally defines the HAS_GETSERVBYPORT
499 symbol, which indicates to the C program that the
500 getservbyport() routine is available to look up services
503 d_getsent (d_getsent.U):
504 This variable conditionally defines HAS_GETSERVENT if getservent() is
505 available to look up network services in some data base or another.
507 d_getservprotos (d_getservprotos.U):
508 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
509 which indicates to the C program that <netdb.h> supplies
510 prototypes for the various getserv*() functions.
511 See also netdbtype.U for probing for various netdb types.
513 d_gettimeod (d_ftime.U):
514 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
515 indicates that the gettimeofday() system call exists (to obtain a
516 sub-second accuracy clock). You should probably include <sys/resource.h>.
518 d_gnulibc (d_gnulibc.U):
519 Defined if we're dealing with the GNU C Library.
522 This variable conditionally defines HAS_HTONL if htonl() and its
523 friends are available to do network order byte swapping.
525 d_index (d_strchr.U):
526 This variable conditionally defines HAS_INDEX if index() and
527 rindex() are available for string searching.
529 d_inetaton (d_inetaton.U):
530 This variable conditionally defines the HAS_INET_ATON symbol, which
531 indicates to the C program that the inet_aton() function is available
532 to parse IP address "dotted-quad" strings.
534 d_isascii (d_isascii.U):
535 This variable conditionally defines the HAS_ISASCII constant,
536 which indicates to the C program that isascii() is available.
538 d_killpg (d_killpg.U):
539 This variable conditionally defines the HAS_KILLPG symbol, which
540 indicates to the C program that the killpg() routine is available
541 to kill process groups.
543 d_lchown (d_lchown.U):
544 This variable conditionally defines the HAS_LCHOWN symbol, which
545 indicates to the C program that the lchown() routine is available
546 to operate on a symbolic link (instead of following the link).
549 This variable conditionally defines HAS_LINK if link() is
550 available to create hard links.
552 d_locconv (d_locconv.U):
553 This variable conditionally defines HAS_LOCALECONV if localeconv() is
554 available for numeric and monetary formatting conventions.
557 This variable conditionally defines HAS_LOCKF if lockf() is
558 available to do file locking.
560 d_longdbl (d_longdbl.U):
561 This variable conditionally defines HAS_LONG_DOUBLE if
562 the long double type is supported.
564 d_longlong (d_longlong.U):
565 This variable conditionally defines HAS_LONG_LONG if
566 the long long type is supported.
569 This variable conditionally defines HAS_LSTAT if lstat() is
570 available to do file stats on symbolic links.
573 This variable conditionally defines the HAS_MBLEN symbol, which
574 indicates to the C program that the mblen() routine is available
575 to find the number of bytes in a multibye character.
577 d_mbstowcs (d_mbstowcs.U):
578 This variable conditionally defines the HAS_MBSTOWCS symbol, which
579 indicates to the C program that the mbstowcs() routine is available
580 to convert a multibyte string into a wide character string.
582 d_mbtowc (d_mbtowc.U):
583 This variable conditionally defines the HAS_MBTOWC symbol, which
584 indicates to the C program that the mbtowc() routine is available
585 to convert multibyte to a wide character.
587 d_memcmp (d_memcmp.U):
588 This variable conditionally defines the HAS_MEMCMP symbol, which
589 indicates to the C program that the memcmp() routine is available
590 to compare blocks of memory.
592 d_memcpy (d_memcpy.U):
593 This variable conditionally defines the HAS_MEMCPY symbol, which
594 indicates to the C program that the memcpy() routine is available
595 to copy blocks of memory.
597 d_memmove (d_memmove.U):
598 This variable conditionally defines the HAS_MEMMOVE symbol, which
599 indicates to the C program that the memmove() routine is available
600 to copy potentatially overlapping blocks of memory.
602 d_memset (d_memset.U):
603 This variable conditionally defines the HAS_MEMSET symbol, which
604 indicates to the C program that the memset() routine is available
605 to set blocks of memory.
608 This variable conditionally defines the HAS_MKDIR symbol, which
609 indicates to the C program that the mkdir() routine is available
610 to create directories..
612 d_mkfifo (d_mkfifo.U):
613 This variable conditionally defines the HAS_MKFIFO symbol, which
614 indicates to the C program that the mkfifo() routine is available.
616 d_mkstemp (d_mkstemp.U):
617 This variable conditionally defines the HAS_MKSTEMP symbol, which
618 indicates to the C program that the mkstemp() routine is available
619 to create and open a unique tempporary file.
621 d_mktime (d_mktime.U):
622 This variable conditionally defines the HAS_MKTIME symbol, which
623 indicates to the C program that the mktime() routine is available.
626 This variable conditionally defines the HAS_MSG symbol, which
627 indicates that the entire msg*(2) library is present.
629 d_msgctl (d_msgctl.U):
630 This variable conditionally defines the HAS_MSGCTL symbol, which
631 indicates to the C program that the msgctl() routine is available.
633 d_msgget (d_msgget.U):
634 This variable conditionally defines the HAS_MSGGET symbol, which
635 indicates to the C program that the msgget() routine is available.
637 d_msgrcv (d_msgrcv.U):
638 This variable conditionally defines the HAS_MSGRCV symbol, which
639 indicates to the C program that the msgrcv() routine is available.
641 d_msgsnd (d_msgsnd.U):
642 This variable conditionally defines the HAS_MSGSND symbol, which
643 indicates to the C program that the msgsnd() routine is available.
645 d_mymalloc (mallocsrc.U):
646 This variable conditionally defines MYMALLOC in case other parts
647 of the source want to take special action if MYMALLOC is used.
648 This may include different sorts of profiling or error detection.
651 This variable conditionally defines the HAS_NICE symbol, which
652 indicates to the C program that the nice() routine is available.
654 d_oldpthreads (usethreads.U):
655 This variable conditionally defines the OLD_PTHREADS_API symbol,
656 and indicates that Perl should be built to use the old
657 draft POSIX threads API. This is only potneially meaningful if
660 d_oldsock (d_socket.U):
661 This variable conditionally defines the OLDSOCKET symbol, which
662 indicates that the BSD socket interface is based on 4.1c and not 4.2.
665 This variable conditionally defines the HAS_OPEN3 manifest constant,
666 which indicates to the C program that the 3 argument version of
667 the open(2) function is available.
669 d_pathconf (d_pathconf.U):
670 This variable conditionally defines the HAS_PATHCONF symbol, which
671 indicates to the C program that the pathconf() routine is available
672 to determine file-system related limits and options associated
673 with a given filename.
676 This variable conditionally defines the HAS_PAUSE symbol, which
677 indicates to the C program that the pause() routine is available
678 to suspend a process until a signal is received.
680 d_phostname (d_gethname.U):
681 This variable conditionally defines the PHOSTNAME symbol, which
682 contains the shell command which, when fed to popen(), may be
683 used to derive the host name.
686 This variable conditionally defines the HAS_PIPE symbol, which
687 indicates to the C program that the pipe() routine is available
688 to create an inter-process channel.
691 This variable conditionally defines the HAS_POLL symbol, which
692 indicates to the C program that the poll() routine is available
693 to poll active file descriptors.
695 d_portable (d_portable.U):
696 This variable conditionally defines the PORTABLE symbol, which
697 indicates to the C program that it should not assume that it is
698 running on the machine it was compiled on.
700 d_pthread_yield (d_pthread_y.U):
701 This variable conditionally defines the HAS_PTHREAD_YIELD
702 symbol if the pthread_yield routine is available to yield
703 the execution of the current thread.
705 d_pthreads_created_joinable (d_pthreadj.U):
706 This variable conditionally defines the PTHREADS_CREATED_JOINABLE
707 symbol if pthreads are created in the joinable (aka undetached)
711 This variable conditionally defines PWAGE, which indicates
712 that struct passwd contains pw_age.
714 d_pwchange (i_pwd.U):
715 This variable conditionally defines PWCHANGE, which indicates
716 that struct passwd contains pw_change.
719 This variable conditionally defines PWCLASS, which indicates
720 that struct passwd contains pw_class.
722 d_pwcomment (i_pwd.U):
723 This variable conditionally defines PWCOMMENT, which indicates
724 that struct passwd contains pw_comment.
726 d_pwexpire (i_pwd.U):
727 This variable conditionally defines PWEXPIRE, which indicates
728 that struct passwd contains pw_expire.
731 This variable conditionally defines PWGECOS, which indicates
732 that struct passwd contains pw_gecos.
735 This variable conditionally defines PWQUOTA, which indicates
736 that struct passwd contains pw_quota.
738 d_readdir (d_readdir.U):
739 This variable conditionally defines HAS_READDIR if readdir() is
740 available to read directory entries.
742 d_readlink (d_readlink.U):
743 This variable conditionally defines the HAS_READLINK symbol, which
744 indicates to the C program that the readlink() routine is available
745 to read the value of a symbolic link.
747 d_rename (d_rename.U):
748 This variable conditionally defines the HAS_RENAME symbol, which
749 indicates to the C program that the rename() routine is available
752 d_rewinddir (d_readdir.U):
753 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
757 This variable conditionally defines HAS_RMDIR if rmdir() is
758 available to remove directories.
760 d_safebcpy (d_safebcpy.U):
761 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
762 the bcopy() routine can do overlapping copies.
764 d_safemcpy (d_safemcpy.U):
765 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
766 the memcpy() routine can do overlapping copies.
768 d_sanemcmp (d_sanemcmp.U):
769 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
770 the memcpy() routine is available and can be used to compare relative
771 magnitudes of chars with their high bits set.
773 d_sched_yield (d_pthread_y.U):
774 This variable conditionally defines the HAS_SCHED_YIELD
775 symbol if the sched_yield routine is available to yield
776 the execution of the current thread.
778 d_seekdir (d_readdir.U):
779 This variable conditionally defines HAS_SEEKDIR if seekdir() is
782 d_select (d_select.U):
783 This variable conditionally defines HAS_SELECT if select() is
784 available to select active file descriptors. A <sys/time.h>
785 inclusion may be necessary for the timeout field.
788 This variable conditionally defines the HAS_SEM symbol, which
789 indicates that the entire sem*(2) library is present.
791 d_semctl (d_semctl.U):
792 This variable conditionally defines the HAS_SEMCTL symbol, which
793 indicates to the C program that the semctl() routine is available.
795 d_semget (d_semget.U):
796 This variable conditionally defines the HAS_SEMGET symbol, which
797 indicates to the C program that the semget() routine is available.
800 This variable conditionally defines the HAS_SEMOP symbol, which
801 indicates to the C program that the semop() routine is available.
803 d_setegid (d_setegid.U):
804 This variable conditionally defines the HAS_SETEGID symbol, which
805 indicates to the C program that the setegid() routine is available
806 to change the effective gid of the current program.
808 d_seteuid (d_seteuid.U):
809 This variable conditionally defines the HAS_SETEUID symbol, which
810 indicates to the C program that the seteuid() routine is available
811 to change the effective uid of the current program.
813 d_setgrps (d_setgrps.U):
814 This variable conditionally defines the HAS_SETGROUPS symbol, which
815 indicates to the C program that the setgroups() routine is available
816 to set the list of process groups.
818 d_sethent (d_sethent.U):
819 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
822 d_setlinebuf (d_setlnbuf.U):
823 This variable conditionally defines the HAS_SETLINEBUF symbol, which
824 indicates to the C program that the setlinebuf() routine is available
825 to change stderr or stdout from block-buffered or unbuffered to a
828 d_setlocale (d_setlocale.U):
829 This variable conditionally defines HAS_SETLOCALE if setlocale() is
830 available to handle locale-specific ctype implementations.
832 d_setnent (d_setnent.U):
833 This variable conditionally defines HAS_SETNETENT if setnetent() is
836 d_setpent (d_setpent.U):
837 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
840 d_setpgid (d_setpgid.U):
841 This variable conditionally defines the HAS_SETPGID symbol if the
842 setpgid(pid, gpid) function is available to set process group ID.
844 d_setpgrp2 (d_setpgrp2.U):
845 This variable conditionally defines the HAS_SETPGRP2 symbol, which
846 indicates to the C program that the setpgrp2() (as in DG/UX) routine
847 is available to set the current process group.
849 d_setpgrp (d_setpgrp.U):
850 This variable conditionally defines HAS_SETPGRP if setpgrp() is
851 available to set the current process group.
853 d_setprior (d_setprior.U):
854 This variable conditionally defines HAS_SETPRIORITY if setpriority()
855 is available to set a process's priority.
857 d_setregid (d_setregid.U):
858 This variable conditionally defines HAS_SETREGID if setregid() is
859 available to change the real and effective gid of the current
862 d_setresgid (d_setregid.U):
863 This variable conditionally defines HAS_SETRESGID if setresgid() is
864 available to change the real, effective and saved gid of the current
867 d_setresuid (d_setreuid.U):
868 This variable conditionally defines HAS_SETREUID if setresuid() is
869 available to change the real, effective and saved uid of the current
872 d_setreuid (d_setreuid.U):
873 This variable conditionally defines HAS_SETREUID if setreuid() is
874 available to change the real and effective uid of the current
877 d_setrgid (d_setrgid.U):
878 This variable conditionally defines the HAS_SETRGID symbol, which
879 indicates to the C program that the setrgid() routine is available
880 to change the real gid of the current program.
882 d_setruid (d_setruid.U):
883 This variable conditionally defines the HAS_SETRUID symbol, which
884 indicates to the C program that the setruid() routine is available
885 to change the real uid of the current program.
887 d_setsent (d_setsent.U):
888 This variable conditionally defines HAS_SETSERVENT if setservent() is
891 d_setsid (d_setsid.U):
892 This variable conditionally defines HAS_SETSID if setsid() is
893 available to set the process group ID.
895 d_setvbuf (d_setvbuf.U):
896 This variable conditionally defines the HAS_SETVBUF symbol, which
897 indicates to the C program that the setvbuf() routine is available
898 to change buffering on an open stdio stream.
901 This variable conditionally defines the USE_SFIO symbol,
902 and indicates whether sfio is available (and should be used).
905 This variable conditionally defines the HAS_SHM symbol, which
906 indicates that the entire shm*(2) library is present.
909 This variable conditionally defines the HAS_SHMAT symbol, which
910 indicates to the C program that the shmat() routine is available.
912 d_shmatprototype (d_shmat.U):
913 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
914 symbol, which indicates that sys/shm.h has a prototype for
917 d_shmctl (d_shmctl.U):
918 This variable conditionally defines the HAS_SHMCTL symbol, which
919 indicates to the C program that the shmctl() routine is available.
922 This variable conditionally defines the HAS_SHMDT symbol, which
923 indicates to the C program that the shmdt() routine is available.
925 d_shmget (d_shmget.U):
926 This variable conditionally defines the HAS_SHMGET symbol, which
927 indicates to the C program that the shmget() routine is available.
929 d_sigaction (d_sigaction.U):
930 This variable conditionally defines the HAS_SIGACTION symbol, which
931 indicates that the Vr4 sigaction() routine is available.
933 d_sigsetjmp (d_sigsetjmp.U):
934 This variable conditionally defines the HAS_SIGSETJMP symbol,
935 which indicates that the sigsetjmp() routine is available to
936 call setjmp() and optionally save the process's signal mask.
938 d_socket (d_socket.U):
939 This variable conditionally defines HAS_SOCKET, which indicates
940 that the BSD socket interface is supported.
942 d_sockpair (d_socket.U):
943 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
944 indicates that the BSD socketpair() is supported.
946 d_statblks (d_statblks.U):
947 This variable conditionally defines USE_STAT_BLOCKS if this system
948 has a stat structure declaring st_blksize and st_blocks.
950 d_stdio_cnt_lval (d_stdstdio.U):
951 This variable conditionally defines STDIO_CNT_LVALUE if the
952 FILE_cnt macro can be used as an lvalue.
954 d_stdio_ptr_lval (d_stdstdio.U):
955 This variable conditionally defines STDIO_PTR_LVALUE if the
956 FILE_ptr macro can be used as an lvalue.
958 d_stdiobase (d_stdstdio.U):
959 This variable conditionally defines USE_STDIO_BASE if this system
960 has a FILE structure declaring a usable _base field (or equivalent)
963 d_stdstdio (d_stdstdio.U):
964 This variable conditionally defines USE_STDIO_PTR if this system
965 has a FILE structure declaring usable _ptr and _cnt fields (or
966 equivalent) in stdio.h.
968 d_strchr (d_strchr.U):
969 This variable conditionally defines HAS_STRCHR if strchr() and
970 strrchr() are available for string searching.
972 d_strcoll (d_strcoll.U):
973 This variable conditionally defines HAS_STRCOLL if strcoll() is
974 available to compare strings using collating information.
976 d_strctcpy (d_strctcpy.U):
977 This variable conditionally defines the USE_STRUCT_COPY symbol, which
978 indicates to the C program that this C compiler knows how to copy
981 d_strerrm (d_strerror.U):
982 This variable holds what Strerrr is defined as to translate an error
983 code condition into an error message string. It could be 'strerror'
984 or a more complex macro emulating strrror with sys_errlist[], or the
985 "unknown" string when both strerror and sys_errlist are missing.
987 d_strerror (d_strerror.U):
988 This variable conditionally defines HAS_STRERROR if strerror() is
989 available to translate error numbers to strings.
991 d_strtod (d_strtod.U):
992 This variable conditionally defines the HAS_STRTOD symbol, which
993 indicates to the C program that the strtod() routine is available
994 to provide better numeric string conversion than atof().
996 d_strtol (d_strtol.U):
997 This variable conditionally defines the HAS_STRTOL symbol, which
998 indicates to the C program that the strtol() routine is available
999 to provide better numeric string conversion than atoi() and friends.
1001 d_strtoul (d_strtoul.U):
1002 This variable conditionally defines the HAS_STRTOUL symbol, which
1003 indicates to the C program that the strtoul() routine is available
1004 to provide conversion of strings to unsigned long.
1006 d_strxfrm (d_strxfrm.U):
1007 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1008 available to transform strings.
1010 d_suidsafe (d_dosuid.U):
1011 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1012 if setuid scripts can be secure. This test looks in /dev/fd/.
1014 d_symlink (d_symlink.U):
1015 This variable conditionally defines the HAS_SYMLINK symbol, which
1016 indicates to the C program that the symlink() routine is available
1017 to create symbolic links.
1019 d_syscall (d_syscall.U):
1020 This variable conditionally defines HAS_SYSCALL if syscall() is
1021 available call arbitrary system calls.
1023 d_sysconf (d_sysconf.U):
1024 This variable conditionally defines the HAS_SYSCONF symbol, which
1025 indicates to the C program that the sysconf() routine is available
1026 to determine system related limits and options.
1028 d_sysernlst (d_strerror.U):
1029 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1030 is available to translate error numbers to the symbolic name.
1032 d_syserrlst (d_strerror.U):
1033 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1034 available to translate error numbers to strings.
1036 d_system (d_system.U):
1037 This variable conditionally defines HAS_SYSTEM if system() is
1038 available to issue a shell command.
1040 d_tcgetpgrp (d_tcgtpgrp.U):
1041 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1042 indicates to the C program that the tcgetpgrp() routine is available.
1043 to get foreground process group ID.
1045 d_tcsetpgrp (d_tcstpgrp.U):
1046 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1047 indicates to the C program that the tcsetpgrp() routine is available
1048 to set foreground process group ID.
1050 d_telldir (d_readdir.U):
1051 This variable conditionally defines HAS_TELLDIR if telldir() is
1055 This variable conditionally defines the HAS_TIME symbol, which indicates
1056 that the time() routine exists. The time() routine is normaly
1057 provided on UNIX systems.
1059 d_times (d_times.U):
1060 This variable conditionally defines the HAS_TIMES symbol, which indicates
1061 that the times() routine exists. The times() routine is normaly
1062 provided on UNIX systems. You may have to include <sys/times.h>.
1064 d_truncate (d_truncate.U):
1065 This variable conditionally defines HAS_TRUNCATE if truncate() is
1066 available to truncate files.
1068 d_tzname (d_tzname.U):
1069 This variable conditionally defines HAS_TZNAME if tzname[] is
1070 available to access timezone names.
1072 d_umask (d_umask.U):
1073 This variable conditionally defines the HAS_UMASK symbol, which
1074 indicates to the C program that the umask() routine is available.
1075 to set and get the value of the file creation mask.
1077 d_uname (d_gethname.U):
1078 This variable conditionally defines the HAS_UNAME symbol, which
1079 indicates to the C program that the uname() routine may be
1080 used to derive the host name.
1082 d_vfork (d_vfork.U):
1083 This variable conditionally defines the HAS_VFORK symbol, which
1084 indicates the vfork() routine is available.
1086 d_void_closedir (d_closedir.U):
1087 This variable conditionally defines VOID_CLOSEDIR if closedir()
1088 does not return a value.
1090 d_voidsig (d_voidsig.U):
1091 This variable conditionally defines VOIDSIG if this system
1092 declares "void (*signal(...))()" in signal.h. The old way was to
1093 declare it as "int (*signal(...))()".
1095 d_voidtty (i_sysioctl.U):
1096 This variable conditionally defines USE_IOCNOTTY to indicate that the
1097 ioctl() call with TIOCNOTTY should be used to void tty association.
1098 Otherwise (on USG probably), it is enough to close the standard file
1099 decriptors and do a setpgrp().
1101 d_volatile (d_volatile.U):
1102 This variable conditionally defines the HASVOLATILE symbol, which
1103 indicates to the C program that this C compiler knows about the
1104 volatile declaration.
1106 d_vprintf (d_vprintf.U):
1107 This variable conditionally defines the HAS_VPRINTF symbol, which
1108 indicates to the C program that the vprintf() routine is available
1109 to printf with a pointer to an argument list.
1111 d_wait4 (d_wait4.U):
1112 This variable conditionally defines the HAS_WAIT4 symbol, which
1113 indicates the wait4() routine is available.
1115 d_waitpid (d_waitpid.U):
1116 This variable conditionally defines HAS_WAITPID if waitpid() is
1117 available to wait for child process.
1119 d_wcstombs (d_wcstombs.U):
1120 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1121 indicates to the C program that the wcstombs() routine is available
1122 to convert wide character strings to multibyte strings.
1124 d_wctomb (d_wctomb.U):
1125 This variable conditionally defines the HAS_WCTOMB symbol, which
1126 indicates to the C program that the wctomb() routine is available
1127 to convert a wide character to a multibyte.
1130 This variable conditionally defines the symbol XENIX, which alerts
1131 the C program that it runs under Xenix.
1133 db_hashtype (i_db.U):
1134 This variable contains the type of the hash structure element
1135 in the <db.h> header file. In older versions of DB, it was
1136 int, while in newer ones it is u_int32_t.
1138 db_prefixtype (i_db.U):
1139 This variable contains the type of the prefix structure element
1140 in the <db.h> header file. In older versions of DB, it was
1141 int, while in newer ones it is size_t.
1143 direntrytype (i_dirent.U):
1144 This symbol is set to 'struct direct' or 'struct dirent' depending on
1145 whether dirent is available or not. You should use this pseudo type to
1146 portably declare your directory entries.
1149 This variable contains the extension that is to be used for the
1150 dynamically loaded modules that perl generaties.
1153 This variable contains the name of the dynamic loading file that
1154 will be used with the package.
1156 doublesize (doublesize.U):
1157 This variable contains the value of the DOUBLESIZE symbol, which
1158 indicates to the C program how many bytes there are in a double.
1160 dynamic_ext (Extensions.U):
1161 This variable holds a list of extension files we want to
1162 link dynamically into the package. It is used by Makefile.
1164 eagain (nblock_io.U):
1165 This variable bears the symbolic errno code set by read() when no
1166 data is present on the file and non-blocking I/O was enabled (otherwise,
1167 read() blocks naturally).
1170 When running under Eunice this variable contains a command which will
1171 convert a shell script to the proper form of text file for it to be
1172 executable by the shell. On other systems it is a no-op.
1175 This is an old synonym for _exe.
1177 extensions (Extensions.U):
1178 This variable holds a list of all extension files
1179 linked into the package. It is propagated to Config.pm
1180 and is typically used to test whether a particular extesion
1183 firstmakefile (Unix.U):
1184 This variable defines the first file searched by make. On unix,
1185 it is makefile (then Makefile). On case-insensitive systems,
1186 it might be something else. This is only used to deal with
1187 convoluted make depend tricks.
1189 fpostype (fpostype.U):
1190 This variable defines Fpos_t to be something like fpost_t, long,
1191 uint, or whatever type is used to declare file positions in libc.
1193 freetype (mallocsrc.U):
1194 This variable contains the return type of free(). It is usually
1195 void, but occasionally int.
1198 This variable contains the full pathname to 'csh', whether or
1199 not the user has specified 'portability'. This is only used
1200 in the compiled C program, and we assume that all systems which
1201 can share this executable will have the same full pathname to
1204 full_sed (Loc_sed.U):
1205 This variable contains the full pathname to 'sed', whether or
1206 not the user has specified 'portability'. This is only used
1207 in the compiled C program, and we assume that all systems which
1208 can share this executable will have the same full pathname to
1212 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1213 indicate whether the compiler is version 1 or 2. This is used in
1214 setting some of the default cflags. It is set to '' if not gcc.
1216 gidtype (gidtype.U):
1217 This variable defines Gid_t to be something like gid_t, int,
1218 ushort, or whatever type is used to declare the return type
1219 of getgid(). Typically, it is the type of group ids in the kernel.
1222 This variable contains a command that produces the text of the
1223 /etc/group file. This is normally "cat /etc/group", but can be
1224 "ypcat group" when NIS is used.
1226 groupstype (groupstype.U):
1227 This variable defines Groups_t to be something like gid_t, int,
1228 ushort, or whatever type is used for the second argument to
1229 getgroups() and setgroups(). Usually, this is the same as
1230 gidtype (gid_t), but sometimes it isn't.
1232 h_fcntl (h_fcntl.U):
1233 This is variable gets set in various places to tell i_fcntl that
1234 <fcntl.h> should be included.
1236 h_sysfile (h_sysfile.U):
1237 This is variable gets set in various places to tell i_sys_file that
1238 <sys/file.h> should be included.
1241 Gives the type of hints used for previous answers. May be one of
1242 "default", "recommended" or "previous".
1245 This variable contains a command that produces the text of the
1246 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1247 "ypcat hosts" when NIS is used.
1250 This variable contains a flag which will tell the C compiler and loader
1251 to produce a program running with a huge memory model. If the
1252 huge model is not supported, contains the flag to produce large
1253 model programs. It is up to the Makefile to use this.
1255 i_bsdioctl (i_sysioctl.U):
1256 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1257 indicates to the C program that <sys/bsdioctl.h> exists and should
1261 This variable conditionally defines the I_DB symbol, and indicates
1262 whether a C program may include Berkeley's DB include file <db.h>.
1265 This variable conditionally defines the I_DBM symbol, which
1266 indicates to the C program that <dbm.h> exists and should
1269 i_dirent (i_dirent.U):
1270 This variable conditionally defines I_DIRENT, which indicates
1271 to the C program that it should include <dirent.h>.
1274 This variable conditionally defines the I_DLD symbol, which
1275 indicates to the C program that <dld.h> (GNU dynamic loading)
1276 exists and should be included.
1278 i_dlfcn (i_dlfcn.U):
1279 This variable conditionally defines the I_DLFCN symbol, which
1280 indicates to the C program that <dlfcn.h> exists and should
1283 i_fcntl (i_fcntl.U):
1284 This variable controls the value of I_FCNTL (which tells
1285 the C program to include <fcntl.h>).
1287 i_float (i_float.U):
1288 This variable conditionally defines the I_FLOAT symbol, and indicates
1289 whether a C program may include <float.h> to get symbols like DBL_MAX
1290 or DBL_MIN, i.e. machine dependent floating point values.
1293 This variable conditionally defines the I_GDBM symbol, which
1294 indicates to the C program that <gdbm.h> exists and should
1298 This variable conditionally defines the I_GRP symbol, and indicates
1299 whether a C program should include <grp.h>.
1301 i_limits (i_limits.U):
1302 This variable conditionally defines the I_LIMITS symbol, and indicates
1303 whether a C program may include <limits.h> to get symbols like WORD_BIT
1306 i_locale (i_locale.U):
1307 This variable conditionally defines the I_LOCALE symbol,
1308 and indicates whether a C program should include <locale.h>.
1310 i_malloc (i_malloc.U):
1311 This variable conditionally defines the I_MALLOC symbol, and indicates
1312 whether a C program should include <malloc.h>.
1315 This variable conditionally defines the I_MATH symbol, and indicates
1316 whether a C program may include <math.h>.
1318 i_memory (i_memory.U):
1319 This variable conditionally defines the I_MEMORY symbol, and indicates
1320 whether a C program should include <memory.h>.
1323 This variable conditionally defines the I_NDBM symbol, which
1324 indicates to the C program that <ndbm.h> exists and should
1327 i_netdb (i_netdb.U):
1328 This variable conditionally defines the I_NETDB symbol, and indicates
1329 whether a C program should include <netdb.h>.
1331 i_neterrno (i_neterrno.U):
1332 This variable conditionally defines the I_NET_ERRNO symbol, which
1333 indicates to the C program that <net/errno.h> exists and should
1337 This variable conditionally defines I_NETINET_IN, which indicates
1338 to the C program that it should include <netinet/in.h>. Otherwise,
1339 you may try <sys/in.h>.
1342 This variable conditionally defines I_PWD, which indicates
1343 to the C program that it should include <pwd.h>.
1345 i_rpcsvcdbm (i_dbm.U):
1346 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1347 indicates to the C program that <rpcsvc/dbm.h> exists and should
1348 be included. Some System V systems might need this instead of <dbm.h>.
1351 This variable conditionally defines the I_SFIO symbol,
1352 and indicates whether a C program should include <sfio.h>.
1354 i_sgtty (i_termio.U):
1355 This variable conditionally defines the I_SGTTY symbol, which
1356 indicates to the C program that it should include <sgtty.h> rather
1359 i_stdarg (i_varhdr.U):
1360 This variable conditionally defines the I_STDARG symbol, which
1361 indicates to the C program that <stdarg.h> exists and should
1364 i_stddef (i_stddef.U):
1365 This variable conditionally defines the I_STDDEF symbol, which
1366 indicates to the C program that <stddef.h> exists and should
1369 i_stdlib (i_stdlib.U):
1370 This variable conditionally defines the I_STDLIB symbol, which
1371 indicates to the C program that <stdlib.h> exists and should
1374 i_string (i_string.U):
1375 This variable conditionally defines the I_STRING symbol, which
1376 indicates that <string.h> should be included rather than <strings.h>.
1378 i_sysdir (i_sysdir.U):
1379 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1380 whether a C program should include <sys/dir.h>.
1382 i_sysfile (i_sysfile.U):
1383 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1384 whether a C program should include <sys/file.h> to get R_OK and friends.
1386 i_sysfilio (i_sysioctl.U):
1387 This variable conditionally defines the I_SYS_FILIO symbol, which
1388 indicates to the C program that <sys/filio.h> exists and should
1389 be included in preference to <sys/ioctl.h>.
1392 This variable conditionally defines I_SYS_IN, which indicates
1393 to the C program that it should include <sys/in.h> instead of
1396 i_sysioctl (i_sysioctl.U):
1397 This variable conditionally defines the I_SYS_IOCTL symbol, which
1398 indicates to the C program that <sys/ioctl.h> exists and should
1401 i_sysndir (i_sysndir.U):
1402 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1403 whether a C program should include <sys/ndir.h>.
1405 i_sysparam (i_sysparam.U):
1406 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1407 whether a C program should include <sys/param.h>.
1409 i_sysresrc (i_sysresrc.U):
1410 This variable conditionally defines the I_SYS_RESOURCE symbol,
1411 and indicates whether a C program should include <sys/resource.h>.
1413 i_sysselct (i_sysselct.U):
1414 This variable conditionally defines I_SYS_SELECT, which indicates
1415 to the C program that it should include <sys/select.h> in order to
1416 get the definition of struct timeval.
1418 i_syssockio (i_sysioctl.U):
1419 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1420 C program that socket ioctl codes may be found in <sys/sockio.h>
1421 instead of <sys/ioctl.h>.
1423 i_sysstat (i_sysstat.U):
1424 This variable conditionally defines the I_SYS_STAT symbol,
1425 and indicates whether a C program should include <sys/stat.h>.
1427 i_systime (i_time.U):
1428 This variable conditionally defines I_SYS_TIME, which indicates
1429 to the C program that it should include <sys/time.h>.
1431 i_systimek (i_time.U):
1432 This variable conditionally defines I_SYS_TIME_KERNEL, which
1433 indicates to the C program that it should include <sys/time.h>
1434 with KERNEL defined.
1436 i_systimes (i_systimes.U):
1437 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1438 whether a C program should include <sys/times.h>.
1440 i_systypes (i_systypes.U):
1441 This variable conditionally defines the I_SYS_TYPES symbol,
1442 and indicates whether a C program should include <sys/types.h>.
1444 i_sysun (i_sysun.U):
1445 This variable conditionally defines I_SYS_UN, which indicates
1446 to the C program that it should include <sys/un.h> to get UNIX
1447 domain socket definitions.
1449 i_syswait (i_syswait.U):
1450 This variable conditionally defines I_SYS_WAIT, which indicates
1451 to the C program that it should include <sys/wait.h>.
1453 i_termio (i_termio.U):
1454 This variable conditionally defines the I_TERMIO symbol, which
1455 indicates to the C program that it should include <termio.h> rather
1458 i_termios (i_termio.U):
1459 This variable conditionally defines the I_TERMIOS symbol, which
1460 indicates to the C program that the POSIX <termios.h> file is
1464 This variable conditionally defines I_TIME, which indicates
1465 to the C program that it should include <time.h>.
1467 i_unistd (i_unistd.U):
1468 This variable conditionally defines the I_UNISTD symbol, and indicates
1469 whether a C program should include <unistd.h>.
1471 i_utime (i_utime.U):
1472 This variable conditionally defines the I_UTIME symbol, and indicates
1473 whether a C program should include <utime.h>.
1475 i_values (i_values.U):
1476 This variable conditionally defines the I_VALUES symbol, and indicates
1477 whether a C program may include <values.h> to get symbols like MAXLONG
1480 i_varargs (i_varhdr.U):
1481 This variable conditionally defines I_VARARGS, which indicates
1482 to the C program that it should include <varargs.h>.
1484 i_varhdr (i_varhdr.U):
1485 Contains the name of the header to be included to get va_dcl definition.
1486 Typically one of varargs.h or stdarg.h.
1488 i_vfork (i_vfork.U):
1489 This variable conditionally defines the I_VFORK symbol, and indicates
1490 whether a C program should include vfork.h.
1493 This variable must preceed the normal include path to get hte
1494 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
1495 Value can be "" or "/bsd43" on mips.
1497 installarchlib (archlib.U):
1498 This variable is really the same as archlibexp but may differ on
1499 those systems using AFS. For extra portability, only this variable
1500 should be used in makefiles.
1503 This variable is the same as binexp unless AFS is running in which case
1504 the user is explicitely prompted for it. This variable should always
1505 be used in your makefiles for maximum portability.
1507 installman1dir (man1dir.U):
1508 This variable is really the same as man1direxp, unless you are using
1509 AFS in which case it points to the read/write location whereas
1510 man1direxp only points to the read-only access location. For extra
1511 portability, you should only use this variable within your makefiles.
1513 installman3dir (man3dir.U):
1514 This variable is really the same as man3direxp, unless you are using
1515 AFS in which case it points to the read/write location whereas
1516 man3direxp only points to the read-only access location. For extra
1517 portability, you should only use this variable within your makefiles.
1519 installprivlib (privlib.U):
1520 This variable is really the same as privlibexp but may differ on
1521 those systems using AFS. For extra portability, only this variable
1522 should be used in makefiles.
1524 installscript (scriptdir.U):
1525 This variable is usually the same as scriptdirexp, unless you are on
1526 a system running AFS, in which case they may differ slightly. You
1527 should always use this variable within your makefiles for portability.
1529 installsitearch (sitearch.U):
1530 This variable is really the same as sitearchexp but may differ on
1531 those systems using AFS. For extra portability, only this variable
1532 should be used in makefiles.
1534 installsitelib (sitelib.U):
1535 This variable is really the same as sitelibexp but may differ on
1536 those systems using AFS. For extra portability, only this variable
1537 should be used in makefiles.
1539 intsize (intsize.U):
1540 This variable contains the value of the INTSIZE symbol, which
1541 indicates to the C program how many bytes there are in an int.
1543 known_extensions (Extensions.U):
1544 This variable holds a list of all extensions included in
1548 This variable contains a flag which will tell the C compiler and loader
1549 to produce a program running with a large memory model. It is up to
1550 the Makefile to use this.
1553 This variable indicates the program to be used to link
1554 libraries for dynamic loading. On some systems, it is 'ld'.
1555 On ELF systems, it should be $cc. Mostly, we'll try to respect
1556 the hint file setting.
1558 lddlflags (dlsrc.U):
1559 This variable contains any special flags that might need to be
1560 passed to $ld to create a shared library suitable for dynamic
1561 loading. It is up to the makefile to use it. For hpux, it
1562 should be -b. For sunos 4.1, it is empty.
1564 ldflags (ccflags.U):
1565 This variable contains any additional C loader flags desired by
1566 the user. It is up to the Makefile to use this.
1569 This is an old synonym for _a.
1572 This variable contains the location of the C library.
1574 libperl (libperl.U):
1575 The perl executable is obtained by linking perlmain.c with
1576 libperl, any static extensions (usually just DynaLoader),
1577 and any other libraries needed on this system. libperl
1578 is usually libperl.a, but can also be libperl.so.xxx if
1579 the user wishes to build a perl executable with a shared
1583 This variable holds the general path used to find libraries. It is
1584 intended to be used by other units.
1587 This variable holds the additional libraries we want to use.
1588 It is up to the Makefile to deal with it.
1590 libswanted (Myinit.U):
1591 This variable holds a list of all the libraries we want to
1592 search. The order is chosen to pick up the c library
1593 ahead of ucb or bsd libraries for SVR4.
1595 lkflags (ccflags.U):
1596 This variable contains any additional C partial linker flags desired by
1597 the user. It is up to the Makefile to use this.
1600 This variable holds the name of the command to make
1601 symbolic links (if they are supported). It can be used
1602 in the Makefile. It is either 'ln -s' or 'ln'
1604 locincpth (ccflags.U):
1605 This variable contains a list of additional directories to be
1606 searched by the compiler. The appropriate -I directives will
1607 be added to ccflags. This is intended to simplify setting
1608 local directories from the Configure command line.
1609 It's not much, but it parallels the loclibpth stuff in libpth.U.
1611 loclibpth (libpth.U):
1612 This variable holds the paths used to find local libraries. It is
1613 prepended to libpth, and is intended to be easily set from the
1616 longdblsize (d_longdbl.U):
1617 This variable contains the value of the LONG_DOUBLESIZE symbol, which
1618 indicates to the C program how many bytes there are in a long double,
1619 if this system supports long doubles.
1621 longlongsize (d_longlong.U):
1622 This variable contains the value of the LONGLONGSIZE symbol, which
1623 indicates to the C program how many bytes there are in a long long,
1624 if this system supports long long.
1626 longsize (intsize.U):
1627 This variable contains the value of the LONGSIZE symbol, which
1628 indicates to the C program how many bytes there are in a long.
1630 lseektype (lseektype.U):
1631 This variable defines lseektype to be something like off_t, long,
1632 or whatever type is used to declare lseek offset's type in the
1633 kernel (which also appears to be lseek's return type).
1635 make_set_make (make.U):
1636 Some versions of 'make' set the variable MAKE. Others do not.
1637 This variable contains the string to be included in Makefile.SH
1638 so that MAKE is set if needed, and not if not needed.
1639 Possible values are:
1640 make_set_make='#' # If your make program handles this for you,
1641 make_set_make="MAKE=$make" # if it doesn't.
1642 I used a comment character so that we can distinguish a
1643 'set' value (from a previous config.sh or Configure -D option)
1644 from an uncomputed value.
1646 mallocobj (mallocsrc.U):
1647 This variable contains the name of the malloc.o that this package
1648 generates, if that malloc.o is preferred over the system malloc.
1649 Otherwise the value is null. This variable is intended for generating
1650 Makefiles. See mallocsrc.
1652 mallocsrc (mallocsrc.U):
1653 This variable contains the name of the malloc.c that comes with
1654 the package, if that malloc.c is preferred over the system malloc.
1655 Otherwise the value is null. This variable is intended for generating
1658 malloctype (mallocsrc.U):
1659 This variable contains the kind of ptr returned by malloc and realloc.
1661 man1dir (man1dir.U):
1662 This variable contains the name of the directory in which manual
1663 source pages are to be put. It is the responsibility of the
1664 Makefile.SH to get the value of this into the proper command.
1665 You must be prepared to do the ~name expansion yourself.
1667 man1direxp (man1dir.U):
1668 This variable is the same as the man1dir variable, but is filename
1669 expanded at configuration time, for convenient use in makefiles.
1671 man1ext (man1dir.U):
1672 This variable contains the extension that the manual page should
1673 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
1676 man3dir (man3dir.U):
1677 This variable contains the name of the directory in which manual
1678 source pages are to be put. It is the responsibility of the
1679 Makefile.SH to get the value of this into the proper command.
1680 You must be prepared to do the ~name expansion yourself.
1682 man3direxp (man3dir.U):
1683 This variable is the same as the man3dir variable, but is filename
1684 expanded at configuration time, for convenient use in makefiles.
1686 man3ext (man3dir.U):
1687 This variable contains the extension that the manual page should
1688 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
1692 This variable contains a flag which will tell the C compiler and loader
1693 to produce a program running with a medium memory model. If the
1694 medium model is not supported, contains the flag to produce large
1695 model programs. It is up to the Makefile to use this.
1697 mips_type (usrinc.U):
1698 This variable holds the environment type for the mips system.
1699 Possible values are "BSD 4.3" and "System V".
1702 This variable contains the list of memory models supported by this
1703 system. Possible component values are none, split, unsplit, small,
1704 medium, large, and huge. The component values are space separated.
1706 modetype (modetype.U):
1707 This variable defines modetype to be something like mode_t,
1708 int, unsigned short, or whatever type is used to declare file
1709 modes for system calls.
1711 myarchname (archname.U):
1712 This variable holds the architecture name computed by Configure in
1713 a previous run. It is not intended to be perused by any user and
1714 should never be set in a hint file.
1716 mydomain (myhostname.U):
1717 This variable contains the eventual value of the MYDOMAIN symbol,
1718 which is the domain of the host the program is going to run on.
1719 The domain must be appended to myhostname to form a complete host name.
1720 The dot comes with mydomain, and need not be supplied by the program.
1722 myhostname (myhostname.U):
1723 This variable contains the eventual value of the MYHOSTNAME symbol,
1724 which is the name of the host the program is going to run on.
1725 The domain is not kept with hostname, but must be gotten from mydomain.
1726 The dot comes with mydomain, and need not be supplied by the program.
1728 myuname (Oldconfig.U):
1729 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
1730 pseudo variables assignments in the output are stripped, thank you. The
1731 whole thing is then lower-cased.
1734 This variable contains the -n flag if that is what causes the echo
1735 command to suppress newline. Otherwise it is null. Correct usage is
1736 $echo $n "prompt for a question: $c".
1738 netdb_hlen_type (netdbtype.U):
1739 This variable holds the type used for the 2nd argument to
1740 gethostbyaddr(). Usually, this is int or size_t or unsigned.
1741 This is only useful if you have gethostbyaddr(), naturally.
1743 netdb_host_type (netdbtype.U):
1744 This variable holds the type used for the 1st argument to
1745 gethostbyaddr(). Usually, this is char * or void *, possibly
1746 with or without a const prefix.
1747 This is only useful if you have gethostbyaddr(), naturally.
1749 netdb_name_type (netdbtype.U):
1750 This variable holds the type used for the argument to
1751 gethostbyname(). Usually, this is char * or const char *.
1752 This is only useful if you have gethostbyname(), naturally.
1754 netdb_net_type (netdbtype.U):
1755 This variable holds the type used for the 1st argument to
1756 getnetbyaddr(). Usually, this is int or long.
1757 This is only useful if you have getnetbyaddr(), naturally.
1760 This variable holds the options that may be necessary for nm.
1762 nm_so_opt (usenm.U):
1763 This variable holds the options that may be necessary for nm
1764 to work on a shared library but that can not be used on an
1765 archive library. Currently, this is only used by Linux, where
1766 nm --dynamic is *required* to get symbols from an ELF library which
1767 has been stripped, but nm --dynamic is *fatal* on an archive library.
1768 Maybe Linux should just always set usenm=false.
1770 o_nonblock (nblock_io.U):
1771 This variable bears the symbol value to be used during open() or fcntl()
1772 to turn on non-blocking I/O for a file descriptor. If you wish to switch
1773 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
1774 but that is only supported by some devices.
1777 This is an old synonym for _o.
1779 optimize (ccflags.U):
1780 This variable contains any optimizer/debugger flag that should be used.
1781 It is up to the Makefile to use it.
1783 orderlib (orderlib.U):
1784 This variable is "true" if the components of libraries must be ordered
1785 (with `lorder $* | tsort`) before placing them in an archive. Set to
1786 "false" if ranlib or ar can generate random libraries.
1788 osname (Oldconfig.U):
1789 This variable contains the operating system name (e.g. sunos,
1790 solaris, hpux, etc.). It can be useful later on for setting
1791 defaults. Any spaces are replaced with underscores. It is set
1792 to a null string if we can't figure it out.
1794 osvers (Oldconfig.U):
1795 This variable contains the operating system version (e.g.
1796 4.1.3, 5.2, etc.). It is primarily used for helping select
1797 an appropriate hints file, but might be useful elsewhere for
1798 setting defaults. It is set to '' if we can't figure it out.
1799 We try to be flexible about how much of the version number
1800 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
1801 same for this package, hints files might just be os_4.0 or
1802 os_4.1, etc., not keeping separate files for each little release.
1804 package (package.U):
1805 This variable contains the name of the package being constructed.
1806 It is primarily intended for the use of later Configure units.
1809 This variable contains the name of the preferred pager on the system.
1810 Usual values are (the full pathnames of) more, less, pg, or cat.
1813 This variable contains a command that produces the text of the
1814 /etc/passwd file. This is normally "cat /etc/passwd", but can be
1815 "ypcat passwd" when NIS is used.
1817 patchlevel (patchlevel.U):
1818 The patchlevel level of this package.
1819 The value of patchlevel comes from the patchlevel.h file.
1822 This is an old synonym for p_ in Head.U, the character
1823 used to separate elements in the command shell search PATH.
1825 perladmin (perladmin.U):
1826 Electronic mail address of the perl5 administrator.
1828 perlpath (perlpath.U):
1829 This variable contains the eventual value of the PERLPATH symbol,
1830 which contains the name of the perl interpreter to be used in
1831 shell scripts and in the "eval 'exec'" idiom.
1833 phostname (myhostname.U):
1834 This variable contains the eventual value of the PHOSTNAME symbol,
1835 which is a command that can be fed to popen() to get the host name.
1836 The program should probably not presume that the domain is or isn't
1839 pidtype (pidtype.U):
1840 This variable defines PIDTYPE to be something like pid_t, int,
1841 ushort, or whatever type is used to declare process ids in the kernel.
1844 Holds the private path used by Configure to find out the libraries.
1845 Its value is prepend to libpth. This variable takes care of special
1846 machines, like the mips. Usually, it should be empty.
1849 This variable holds the name of the directory below which the
1850 user will install the package. Usually, this is /usr/local, and
1851 executables go in /usr/local/bin, library stuff in /usr/local/lib,
1852 man pages in /usr/local/man, etc. It is only used to set defaults
1853 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
1855 prefixexp (prefix.U):
1856 This variable holds the full absolute path of the directory below
1857 which the user will install the package. Derived from prefix.
1859 privlib (privlib.U):
1860 This variable contains the eventual value of the PRIVLIB symbol,
1861 which is the name of the private library for this package. It may
1862 have a ~ on the front. It is up to the makefile to eventually create
1863 this directory while performing installation (with ~ substitution).
1865 privlibexp (privlib.U):
1866 This variable is the ~name expanded version of privlib, so that you
1867 may use it directly in Makefiles or shell scripts.
1869 prototype (prototype.U):
1870 This variable holds the eventual value of CAN_PROTOTYPE, which
1871 indicates the C compiler can handle funciton prototypes.
1873 ptrsize (ptrsize.U):
1874 This variable contains the value of the PTRSIZE symbol, which
1875 indicates to the C program how many bytes there are in a pointer.
1877 randbits (randbits.U):
1878 This variable contains the eventual value of the RANDBITS symbol,
1879 which indicates to the C program how many bits of random number
1880 the rand() function produces.
1882 ranlib (orderlib.U):
1883 This variable is set to the pathname of the ranlib program, if it is
1884 needed to generate random libraries. Set to ":" if ar can generate
1885 random libraries or if random libraries are not supported
1887 rd_nodata (nblock_io.U):
1888 This variable holds the return code from read() when no data is
1889 present. It should be -1, but some systems return 0 when O_NDELAY is
1890 used, which is a shame because you cannot make the difference between
1891 no data and an EOF.. Sigh!
1894 This variable contains 'true' or 'false' depending whether the
1895 nm extraction should be performed or not, according to the value
1896 of usenm and the flags on the Configure command line.
1898 scriptdir (scriptdir.U):
1899 This variable holds the name of the directory in which the user wants
1900 to put publicly scripts for the package in question. It is either
1901 the same directory as for binaries, or a special one that can be
1902 mounted across different architectures, like /usr/share. Programs
1903 must be prepared to deal with ~name expansion.
1905 scriptdirexp (scriptdir.U):
1906 This variable is the same as scriptdir, but is filename expanded
1907 at configuration time, for programs not wanting to bother with it.
1909 selecttype (selecttype.U):
1910 This variable holds the type used for the 2nd, 3rd, and 4th
1911 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
1912 is defined, and 'int *' otherwise. This is only useful if you
1913 have select(), naturally.
1916 This variable contains the full pathname of the shell used
1917 on this system to execute Bourne shell scripts. Usually, this will be
1918 /bin/sh, though it's possible that some systems will have /bin/ksh,
1919 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
1921 This unit comes before Options.U, so you can't set sh with a -D
1922 option, though you can override this (and startsh)
1923 with -O -Dsh=/bin/whatever -Dstartsh=whatever
1925 sharpbang (spitshell.U):
1926 This variable contains the string #! if this system supports that
1929 shmattype (d_shmat.U):
1930 This symbol contains the type of pointer returned by shmat().
1931 It can be 'void *' or 'char *'.
1933 shortsize (intsize.U):
1934 This variable contains the value of the SHORTSIZE symbol which
1935 indicates to the C program how many bytes there are in a short.
1937 shrpenv (libperl.U):
1938 If the user builds a shared libperl.so, then we need to tell the
1939 'perl' executable where it will be able to find the installed libperl.so.
1940 One way to do this on some systems is to set the environment variable
1941 LD_RUN_PATH to the directory that will be the final location of the
1942 shared libperl.so. The makefile can use this with something like
1943 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
1945 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
1948 See the main perl Makefile.SH for actual working usage.
1949 Alternatively, we might be able to use a command line option such
1950 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
1951 $archlibexp/CORE (Linux).
1953 shsharp (spitshell.U):
1954 This variable tells further Configure units whether your sh can
1957 sig_name (sig_name.U):
1958 This variable holds the signal names, space separated. The leading
1959 SIG in signal name is removed. A ZERO is prepended to the
1960 list. This is currently not used.
1962 sig_name_init (sig_name.U):
1963 This variable holds the signal names, enclosed in double quotes and
1964 separated by commas, suitable for use in the SIG_NAME definition
1965 below. A "ZERO" is prepended to the list, and the list is
1966 terminated with a plain 0. The leading SIG in signal names
1967 is removed. See sig_num.
1969 sig_num (sig_name.U):
1970 This variable holds the signal numbers, comma separated. A 0 is
1971 prepended to the list (corresponding to the fake SIGZERO), and
1972 the list is terminated with a 0. Those numbers correspond to
1973 the value of the signal listed in the same place within the
1976 signal_t (d_voidsig.U):
1977 This variable holds the type of the signal handler (void or int).
1979 sitearch (sitearch.U):
1980 This variable contains the eventual value of the SITEARCH symbol,
1981 which is the name of the private library for this package. It may
1982 have a ~ on the front. It is up to the makefile to eventually create
1983 this directory while performing installation (with ~ substitution).
1985 sitearchexp (sitearch.U):
1986 This variable is the ~name expanded version of sitearch, so that you
1987 may use it directly in Makefiles or shell scripts.
1989 sitelib (sitelib.U):
1990 This variable contains the eventual value of the SITELIB symbol,
1991 which is the name of the private library for this package. It may
1992 have a ~ on the front. It is up to the makefile to eventually create
1993 this directory while performing installation (with ~ substitution).
1995 sitelibexp (sitelib.U):
1996 This variable is the ~name expanded version of sitelib, so that you
1997 may use it directly in Makefiles or shell scripts.
1999 sizetype (sizetype.U):
2000 This variable defines sizetype to be something like size_t,
2001 unsigned long, or whatever type is used to declare length
2002 parameters for string functions.
2005 This variable contains a flag which will tell the C compiler and loader
2006 to produce a program running with a small memory model. It is up to
2007 the Makefile to use this.
2010 This variable holds the extension used to identify shared libraries
2011 (also known as shared objects) on the system. Usually set to 'so'.
2013 sockethdr (d_socket.U):
2014 This variable has any cpp -I flags needed for socket support.
2016 socketlib (d_socket.U):
2017 This variable has the names of any libraries needed for socket support.
2019 spackage (package.U):
2020 This variable contains the name of the package being constructed,
2021 with the first letter uppercased, i.e. suitable for starting
2024 spitshell (spitshell.U):
2025 This variable contains the command necessary to spit out a runnable
2026 shell on this system. It is either cat or a grep -v for # comments.
2029 This variable contains a flag which will tell the C compiler and loader
2030 to produce a program that will run in separate I and D space, for those
2031 machines that support separation of instruction and data space. It is
2032 up to the Makefile to use this.
2035 This variable holds the path to the package source. It is up to
2036 the Makefile to use this variable and set VPATH accordingly to
2037 find the sources remotely.
2039 ssizetype (ssizetype.U):
2040 This variable defines ssizetype to be something like ssize_t,
2041 long or int. It is used by functions that return a count
2042 of bytes or an error condition. It must be a signed type.
2043 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2045 startperl (startperl.U):
2046 This variable contains the string to put on the front of a perl
2047 script to make sure (hopefully) that it runs with perl and not some
2048 shell. Of course, that leading line must be followed by the classical
2050 eval 'exec perl -S $0 ${1+"$@"}'
2051 if $running_under_some_shell;
2052 to guarantee perl startup should the shell execute the script. Note
2053 that this magic incatation is not understood by csh.
2055 startsh (startsh.U):
2056 This variable contains the string to put on the front of a shell
2057 script to make sure (hopefully) that it runs with sh and not some
2060 static_ext (Extensions.U):
2061 This variable holds a list of extension files we want to
2062 link statically into the package. It is used by Makefile.
2064 stdchar (stdchar.U):
2065 This variable conditionally defines STDCHAR to be the type of char
2066 used in stdio.h. It has the values "unsigned char" or "char".
2068 stdio_base (d_stdstdio.U):
2069 This variable defines how, given a FILE pointer, fp, to access the
2070 _base field (or equivalent) of stdio.h's FILE structure. This will
2071 be used to define the macro FILE_base(fp).
2073 stdio_bufsiz (d_stdstdio.U):
2074 This variable defines how, given a FILE pointer, fp, to determine
2075 the number of bytes store in the I/O buffer pointer to by the
2076 _base field (or equivalent) of stdio.h's FILE structure. This will
2077 be used to define the macro FILE_bufsiz(fp).
2079 stdio_cnt (d_stdstdio.U):
2080 This variable defines how, given a FILE pointer, fp, to access the
2081 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2082 be used to define the macro FILE_cnt(fp).
2084 stdio_filbuf (d_stdstdio.U):
2085 This variable defines how, given a FILE pointer, fp, to tell
2086 stdio to refill it's internal buffers (?). This will
2087 be used to define the macro FILE_filbuf(fp).
2089 stdio_ptr (d_stdstdio.U):
2090 This variable defines how, given a FILE pointer, fp, to access the
2091 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2092 be used to define the macro FILE_ptr(fp).
2094 strings (i_string.U):
2095 This variable holds the full path of the string header that will be
2096 used. Typically /usr/include/string.h or /usr/include/strings.h.
2098 subversion (patchlevel.U):
2099 The subversion level of this package.
2100 The value of subversion comes from the patchlevel.h file.
2101 This is unique to perl.
2104 This variable holds the place where the manual is located on this
2105 system. It is not the place where the user wants to put his manual
2106 pages. Rather it is the place where Configure may look to find manual
2107 for unix commands (section 1 of the manual usually). See mansrc.
2109 timeincl (i_time.U):
2110 This variable holds the full path of the included time header(s).
2112 timetype (d_time.U):
2113 This variable holds the type returned by time(). It can be long,
2114 or time_t on BSD sites (in which case <sys/types.h> should be
2115 included). Anyway, the type Time_t should be used.
2117 uidtype (uidtype.U):
2118 This variable defines Uid_t to be something like uid_t, int,
2119 ushort, or whatever type is used to declare user ids in the kernel.
2122 This variable indicates if the the system supports dynamic
2123 loading of some sort. See also dlsrc and dlobj.
2125 usemymalloc (mallocsrc.U):
2126 This variable contains y if the malloc that comes with this package
2127 is desired over the system's version of malloc. People often include
2128 special versions of malloc for effiency, but such versions are often
2129 less portable. See also mallocsrc and mallocobj.
2130 If this is 'y', then -lmalloc is removed from $libs.
2133 This variable contains 'true' or 'false' depending whether the
2134 nm extraction is wanted or not.
2136 useopcode (Extensions.U):
2137 This variable holds either 'true' or 'false' to indicate
2138 whether the Opcode extension should be used. The sole
2139 use for this currently is to allow an easy mechanism
2140 for users to skip the Opcode extension from the Configure
2143 useperlio (useperlio.U):
2144 This variable conditionally defines the USE_PERLIO symbol,
2145 and indicates that the PerlIO abstraction should be
2148 useposix (Extensions.U):
2149 This variable holds either 'true' or 'false' to indicate
2150 whether the POSIX extension should be used. The sole
2151 use for this currently is to allow an easy mechanism
2152 for hints files to indicate that POSIX will not compile
2153 on a particular system.
2156 This variable is set to true when the user agrees to use sfio.
2157 It is set to false when sfio is not available or when the user
2158 explicitely requests not to use sfio. It is here primarily so
2159 that command-line settings can override the auto-detection of
2160 d_sfio without running into a "WHOA THERE".
2162 useshrplib (libperl.U):
2163 This variable is set to 'yes' if the user wishes
2164 to build a shared libperl, and 'no' otherwise.
2166 usethreads (usethreads.U):
2167 This variable conditionally defines the USE_THREADS symbol,
2168 and indicates that Perl should be built to use threads.
2170 usevfork (d_vfork.U):
2171 This variable is set to true when the user accepts to use vfork.
2172 It is set to false when no vfork is available or when the user
2173 explicitely requests not to use vfork.
2176 This variable holds the path of the include files, which is
2177 usually /usr/include. It is mainly used by other Configure units.
2179 voidflags (voidflags.U):
2180 This variable contains the eventual value of the VOIDFLAGS symbol,
2181 which indicates how much support of the void type is given by this
2182 compiler. See VOIDFLAGS for more info.