1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable is used internally by Configure to determine the
9 full pathname (if any) of the Mcc program. After Configure runs,
10 the value is reset to a plain "Mcc" and is not useful.
13 This variable defines the extension used for ordinary libraries.
14 For unix, it is '.a'. The '.' is included. Other possible
15 values include '.lib'.
18 This variable defines the extension used for executable files.
19 For unix it is empty. Other possible values include '.exe'.
22 This variable defines the extension used for object files.
23 For unix, it is '.o'. The '.' is included. Other possible
24 values include '.obj'.
27 This variable is set to 'true' if AFS (Andrew File System) is used
28 on the system, 'false' otherwise. It is possible to override this
29 with a hint value or command line option, but you'd better know
32 alignbytes (alignbytes.U):
33 This variable holds the number of bytes required to align a
34 double. Usual values are 2, 4 and 8.
36 ansi2knr (ansi2knr.U):
37 This variable is set if the user needs to run ansi2knr.
38 Currently, this is not supported, so we just abort.
40 aphostname (d_gethname.U):
41 Thie variable contains the command which can be used to compute the
42 host name. The command is fully qualified by its absolute path, to make
43 it safe when used by a process with super-user privileges.
45 apiversion (patchlevel.U):
46 This is a number which identifies the lowest version of perl
47 to have an API (for XS extensions) compatible with the present
48 version. For example, for 5.005_01, the apiversion should be
49 5.005, since 5.005_01 should be binary compatible with 5.005.
50 This should probably be incremented manually somehow, perhaps
51 from patchlevel.h. For now, we'll guess maintenance subversions
52 will retain binary compatibility.
55 This variable is used internally by Configure to determine the
56 full pathname (if any) of the ar program. After Configure runs,
57 the value is reset to a plain "ar" and is not useful.
60 This variable holds the name of the directory in which the user wants
61 to put architecture-dependent public library files for $package.
62 It is most often a local directory such as /usr/local/lib.
63 Programs using this variable must be prepared to deal
64 with filename expansion.
66 archlibexp (archlib.U):
67 This variable is the same as the archlib variable, but is
68 filename expanded at configuration time, for convenient use.
70 archname (archname.U):
71 This variable is a short name to characterize the current
72 architecture. It is used mainly to construct the default archlib.
75 This variable defines any additional objects that must be linked
76 in with the program on this architecture. On unix, it is usually
77 empty. It is typically used to include emulations of unix calls
78 or other facilities. For perl on OS/2, for example, this would
82 This variable is used internally by Configure to determine the
83 full pathname (if any) of the awk program. After Configure runs,
84 the value is reset to a plain "awk" and is not useful.
87 The base revision level of this package, from the .package file.
90 This variable is defined but not used by Configure.
91 The value is a plain '' and is not useful.
94 This variable holds the name of the directory in which the user wants
95 to put publicly executable images for the package in question. It
96 is most often a local directory such as /usr/local/bin. Programs using
97 this variable must be prepared to deal with ~name substitution.
100 This is the same as the bin variable, but is filename expanded at
101 configuration time, for use in your makefiles.
104 This variable is defined but not used by Configure.
105 The value is a plain '' and is not useful.
108 This variable is used internally by Configure to determine the
109 full pathname (if any) of the byacc program. After Configure runs,
110 the value is reset to a plain "byacc" and is not useful.
112 byteorder (byteorder.U):
113 This variable holds the byte order. In the following, larger digits
114 indicate more significance. The variable byteorder is either 4321
115 on a big-endian machine, or 1234 on a little-endian, or 87654321
116 on a Cray ... or 3412 with weird order !
119 This variable contains the \c string if that is what causes the echo
120 command to suppress newline. Otherwise it is null. Correct usage is
121 $echo $n "prompt for a question: $c".
123 castflags (d_castneg.U):
124 This variable contains a flag that precise difficulties the
125 compiler has casting odd floating values to unsigned long:
127 1 = couldn't cast < 0
128 2 = couldn't cast >= 0x80000000
129 4 = couldn't cast in argument expression list
132 This variable is used internally by Configure to determine the
133 full pathname (if any) of the cat program. After Configure runs,
134 the value is reset to a plain "cat" and is not useful.
137 This variable holds the name of a command to execute a C compiler which
138 can resolve multiple global references that happen to have the same
139 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
141 cccdlflags (dlsrc.U):
142 This variable contains any special flags that might need to be
143 passed with 'cc -c' to compile modules to be used to create a shared
144 library that will be used for dynamic loading. For hpux, this
145 should be +z. It is up to the makefile to use it.
148 This variable contains any special flags that might need to be
149 passed to cc to link with a shared library for dynamic loading.
150 It is up to the makefile to use it. For sunos 4.1, it should
154 This variable contains any additional C compiler flags desired by
155 the user. It is up to the Makefile to use this.
157 ccsymbols (Cppsym.U):
158 The variable contains the symbols defined by the C compiler alone.
159 The symbols defined by cpp or by cc when it calls cpp are not in
160 this list, see cppsymbols and cppccsymbols.
161 The list is a space-separated list of symbol=value tokens.
164 Login name of the person who ran the Configure script and answered the
165 questions. This is used to tag both config.sh and config_h.SH.
167 cf_email (cf_email.U):
168 Electronic mail address of the person who ran Configure. This can be
169 used by units that require the user's e-mail, like MailList.U.
172 Holds the output of the "date" command when the configuration file was
173 produced. This is used to tag both config.sh and config_h.SH.
176 This variable is defined but not used by Configure.
177 The value is a plain '' and is not useful.
180 This variable is defined but not used by Configure.
181 The value is a plain '' and is not useful.
184 This variable is defined but not used by Configure.
185 The value is a plain '' and is not useful.
187 clocktype (d_times.U):
188 This variable holds the type returned by times(). It can be long,
189 or clock_t on BSD sites (in which case <sys/types.h> should be
193 This variable is used internally by Configure to determine the
194 full pathname (if any) of the comm program. After Configure runs,
195 the value is reset to a plain "comm" and is not useful.
198 This variable is defined but not used by Configure.
199 The value is a plain '' and is not useful.
201 contains (contains.U):
202 This variable holds the command to do a grep with a proper return
203 status. On most sane systems it is simply "grep". On insane systems
204 it is a grep followed by a cat followed by a test. This variable
205 is primarily for the use of other Configure units.
208 This variable is used internally by Configure to determine the
209 full pathname (if any) of the cp program. After Configure runs,
210 the value is reset to a plain "cp" and is not useful.
213 This variable is defined but not used by Configure.
214 The value is a plain '' and is not useful.
217 This variable is used internally by Configure to determine the
218 full pathname (if any) of the cpp program. After Configure runs,
219 the value is reset to a plain "cpp" and is not useful.
221 cpp_stuff (cpp_stuff.U):
222 This variable contains an identification of the catenation mechanism
223 used by the C preprocessor.
225 cppflags (ccflags.U):
226 This variable holds the flags that will be passed to the C pre-
227 processor. It is up to the Makefile to use it.
229 cpplast (cppstdin.U):
230 This variable has the same functionality as cppminus, only it applies to
231 cpprun and not cppstdin.
233 cppminus (cppstdin.U):
234 This variable contains the second part of the string which will invoke
235 the C preprocessor on the standard input and produce to standard
236 output. This variable will have the value "-" if cppstdin needs a minus
237 to specify standard input, otherwise the value is "".
240 This variable contains the command which will invoke a C preprocessor
241 on standard input and put the output to stdout. It is guaranteed not
242 to be a wrapper and may be a null string if no preprocessor can be
243 made directly available. This preprocessor might be different from the
244 one used by the C compiler. Don't forget to append cpplast after the
245 preprocessor options.
247 cppstdin (cppstdin.U):
248 This variable contains the command which will invoke the C
249 preprocessor on standard input and put the output to stdout.
250 It is primarily used by other Configure units that ask about
251 preprocessor symbols.
253 cppsymbols (Cppsym.U):
254 The variable contains the symbols defined by the C preprocessor
255 alone. The symbols defined by cc or by cc when it calls cpp are
256 not in this list, see ccsymbols and cppccsymbols.
257 The list is a space-separated list of symbol=value tokens.
259 cppccsymbols (Cppsym.U):
260 The variable contains the symbols defined by the C compiler when
261 when it calls cpp. The symbols defined by the cc alone or cpp
262 alone are not in this list, see ccsymbols and cppsymbols.
263 The list is a space-separated list of symbol=value tokens.
265 cryptlib (d_crypt.U):
266 This variable holds -lcrypt or the path to a libcrypt.a archive if
267 the crypt() function is not defined in the standard C library. It is
268 up to the Makefile to use this.
271 This variable is used internally by Configure to determine the
272 full pathname (if any) of the csh program. After Configure runs,
273 the value is reset to a plain "csh" and is not useful.
275 d_Gconvert (d_gconvert.U):
276 This variable holds what Gconvert is defined as to convert
277 floating point numbers into strings. It could be 'gconvert'
278 or a more complex macro emulating gconvert with gcvt() or sprintf.
280 d_access (d_access.U):
281 This variable conditionally defines HAS_ACCESS if the access() system
282 call is available to check for access permissions using real IDs.
285 This variable conditionally defines the HAS_ALARM symbol, which
286 indicates to the C program that the alarm() routine is available.
288 d_archlib (archlib.U):
289 This variable conditionally defines ARCHLIB to hold the pathname
290 of architecture-dependent library files for $package. If
291 $archlib is the same as $privlib, then this is set to undef.
293 d_attribut (d_attribut.U):
294 This variable conditionally defines HASATTRIBUTE, which
295 indicates the C compiler can check for function attributes,
296 such as printf formats.
299 This variable conditionally defines the HAS_BCMP symbol if
300 the bcmp() routine is available to compare strings.
303 This variable conditionally defines the HAS_BCOPY symbol if
304 the bcopy() routine is available to copy strings.
307 This symbol conditionally defines the symbol BSD when running on a
310 d_bsdgetpgrp (d_getpgrp.U):
311 This variable conditionally defines USE_BSD_GETPGRP if
312 getpgrp needs one arguments whereas USG one needs none.
314 d_bsdsetpgrp (d_setpgrp.U):
315 This variable conditionally defines USE_BSD_SETPGRP if
316 setpgrp needs two arguments whereas USG one needs none.
317 See also d_setpgid for a POSIX interface.
320 This variable conditionally defines the HAS_BZERO symbol if
321 the bzero() routine is available to set memory to 0.
323 d_casti32 (d_casti32.U):
324 This variable conditionally defines CASTI32, which indicates
325 whether the C compiler can cast large floats to 32-bit ints.
327 d_castneg (d_castneg.U):
328 This variable conditionally defines CASTNEG, which indicates
329 wether the C compiler can cast negative float to unsigned.
331 d_charvspr (d_vprintf.U):
332 This variable conditionally defines CHARVSPRINTF if this system
333 has vsprintf returning type (char*). The trend seems to be to
334 declare it as "int vsprintf()".
337 This variable conditionally defines the HAS_CHOWN symbol, which
338 indicates to the C program that the chown() routine is available.
340 d_chroot (d_chroot.U):
341 This variable conditionally defines the HAS_CHROOT symbol, which
342 indicates to the C program that the chroot() routine is available.
344 d_chsize (d_chsize.U):
345 This variable conditionally defines the CHSIZE symbol, which
346 indicates to the C program that the chsize() routine is available
347 to truncate files. You might need a -lx to get this routine.
349 d_closedir (d_closedir.U):
350 This variable conditionally defines HAS_CLOSEDIR if closedir() is
354 This variable conditionally defines the HASCONST symbol, which
355 indicates to the C program that this C compiler knows about the
359 This variable conditionally defines the CRYPT symbol, which
360 indicates to the C program that the crypt() routine is available
361 to encrypt passwords and the like.
364 This variable conditionally defines the CSH symbol, which
365 indicates to the C program that the C-shell exists.
367 d_cuserid (d_cuserid.U):
368 This variable conditionally defines the HAS_CUSERID symbol, which
369 indicates to the C program that the cuserid() routine is available
370 to get character login names.
372 d_dbl_dig (d_dbl_dig.U):
373 This variable conditionally defines d_dbl_dig if this system's
374 header files provide DBL_DIG, which is the number of significant
375 digits in a double precision number.
377 d_difftime (d_difftime.U):
378 This variable conditionally defines the HAS_DIFFTIME symbol, which
379 indicates to the C program that the difftime() routine is available.
381 d_dirnamlen (i_dirent.U):
382 This variable conditionally defines DIRNAMLEN, which indicates
383 to the C program that the length of directory entry names is
384 provided by a d_namelen field.
386 d_dlerror (d_dlerror.U):
387 This variable conditionally defines the HAS_DLERROR symbol, which
388 indicates to the C program that the dlerror() routine is available.
390 d_dlopen (d_dlopen.U):
391 This variable conditionally defines the HAS_DLOPEN symbol, which
392 indicates to the C program that the dlopen() routine is available.
394 d_dlsymun (d_dlsymun.U):
395 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
396 indicates that we need to prepend an underscore to the symbol
397 name before calling dlsym().
399 d_dosuid (d_dosuid.U):
400 This variable conditionally defines the symbol DOSUID, which
401 tells the C program that it should insert setuid emulation code
402 on hosts which have setuid #! scripts disabled.
405 This variable conditionally defines HAS_DUP2 if dup2() is
406 available to duplicate file descriptors.
408 d_endgrent (d_endgrent.U):
409 This variable conditionally defines the HAS_ENDGRENT symbol, which
410 indicates to the C program that the endgrent() routine is available
411 for sequential access of the group database.
413 d_endhent (d_endhent.U):
414 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
415 available to close whatever was being used for host queries.
417 d_endnent (d_endnent.U):
418 This variable conditionally defines HAS_ENDNETENT if endnetent() is
419 available to close whatever was being used for network queries.
421 d_endpent (d_endpent.U):
422 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
423 available to close whatever was being used for protocol queries.
425 d_endpwent (d_endpwent.U):
426 This variable conditionally defines the HAS_ENDPWENT symbol, which
427 indicates to the C program that the endpwent() routine is available
428 for sequential access of the passwd database.
430 d_endsent (d_endsent.U):
431 This variable conditionally defines HAS_ENDSERVENT if endservent() is
432 available to close whatever was being used for service queries.
434 d_eofnblk (nblock_io.U):
435 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
436 when reading from a non-blocking I/O source.
439 This variable conditionally defines the symbols EUNICE and VAX, which
440 alerts the C program that it must deal with ideosyncracies of VMS.
442 d_fchmod (d_fchmod.U):
443 This variable conditionally defines the HAS_FCHMOD symbol, which
444 indicates to the C program that the fchmod() routine is available
445 to change mode of opened files.
447 d_fchown (d_fchown.U):
448 This variable conditionally defines the HAS_FCHOWN symbol, which
449 indicates to the C program that the fchown() routine is available
450 to change ownership of opened files.
453 This variable conditionally defines the HAS_FCNTL symbol, and indicates
454 whether the fcntl() function exists
456 d_fd_macros (d_fd_set.U):
457 This variable contains the eventual value of the HAS_FD_MACROS symbol,
458 which indicates if your C compiler knows about the macros which
459 manipulate an fd_set.
461 d_fd_set (d_fd_set.U):
462 This variable contains the eventual value of the HAS_FD_SET symbol,
463 which indicates if your C compiler knows about the fd_set typedef.
465 d_fds_bits (d_fd_set.U):
466 This variable contains the eventual value of the HAS_FDS_BITS symbol,
467 which indicates if your fd_set typedef contains the fds_bits member.
468 If you have an fd_set typedef, but the dweebs who installed it did
469 a half-fast job and neglected to provide the macros to manipulate
470 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
472 d_fgetpos (d_fgetpos.U):
473 This variable conditionally defines HAS_FGETPOS if fgetpos() is
474 available to get the file position indicator.
476 d_flexfnam (d_flexfnam.U):
477 This variable conditionally defines the FLEXFILENAMES symbol, which
478 indicates that the system supports filenames longer than 14 characters.
481 This variable conditionally defines HAS_FLOCK if flock() is
482 available to do file locking.
485 This variable conditionally defines the HAS_FORK symbol, which
486 indicates to the C program that the fork() routine is available.
488 d_fpathconf (d_pathconf.U):
489 This variable conditionally defines the HAS_FPATHCONF symbol, which
490 indicates to the C program that the pathconf() routine is available
491 to determine file-system related limits and options associated
492 with a given open file descriptor.
494 d_fsetpos (d_fsetpos.U):
495 This variable conditionally defines HAS_FSETPOS if fsetpos() is
496 available to set the file position indicator.
498 d_fstatfs (d_statfs.U):
499 This variable conditionally defines the HAS_FSTATFS symbol, which
500 indicates to the C program that the fstatfs() routine is available.
502 d_fstatvfs (d_statvfs.U):
503 This variable conditionally defines the HAS_FSTATVFS symbol, which
504 indicates to the C program that the fstatvfs() routine is available.
507 This variable conditionally defines the HAS_FTIME symbol, which indicates
508 that the ftime() routine exists. The ftime() routine is basically
509 a sub-second accuracy clock.
511 d_getgrent (d_getgrent.U):
512 This variable conditionally defines the HAS_GETGRENT symbol, which
513 indicates to the C program that the getgrent() routine is available
514 for sequential access of the group database.
516 d_getgrps (d_getgrps.U):
517 This variable conditionally defines the HAS_GETGROUPS symbol, which
518 indicates to the C program that the getgroups() routine is available
519 to get the list of process groups.
521 d_gethbyaddr (d_gethbyad.U):
522 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
523 indicates to the C program that the gethostbyaddr() routine is available
524 to look up hosts by their IP addresses.
526 d_gethbyname (d_gethbynm.U):
527 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
528 indicates to the C program that the gethostbyname() routine is available
529 to look up host names in some data base or other.
531 d_gethent (d_gethent.U):
532 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
533 available to look up host names in some data base or another.
535 d_gethname (d_gethname.U):
536 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
537 indicates to the C program that the gethostname() routine may be
538 used to derive the host name.
540 d_gethostprotos (d_gethostprotos.U):
541 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
542 which indicates to the C program that <netdb.h> supplies
543 prototypes for the various gethost*() functions.
544 See also netdbtype.U for probing for various netdb types.
546 d_getlogin (d_getlogin.U):
547 This variable conditionally defines the HAS_GETLOGIN symbol, which
548 indicates to the C program that the getlogin() routine is available
549 to get the login name.
551 d_getmntent (d_getmntent.U):
552 This variable conditionally defines the HAS_GETMNTENT symbol, which
553 indicates to the C program that the getmntent() routine is available
554 to iterate through mounted files.
556 d_getnbyaddr (d_getnbyad.U):
557 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
558 indicates to the C program that the getnetbyaddr() routine is available
559 to look up networks by their IP addresses.
561 d_getnbyname (d_getnbynm.U):
562 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
563 indicates to the C program that the getnetbyname() routine is available
564 to look up networks by their names.
566 d_getnent (d_getnent.U):
567 This variable conditionally defines HAS_GETNETENT if getnetent() is
568 available to look up network names in some data base or another.
570 d_getnetprotos (d_getnetprotos.U):
571 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
572 which indicates to the C program that <netdb.h> supplies
573 prototypes for the various getnet*() functions.
574 See also netdbtype.U for probing for various netdb types.
576 d_getpbyname (d_getprotby.U):
577 This variable conditionally defines the HAS_GETPROTOBYNAME
578 symbol, which indicates to the C program that the
579 getprotobyname() routine is available to look up protocols
582 d_getpbynumber (d_getprotby.U):
583 This variable conditionally defines the HAS_GETPROTOBYNUMBER
584 symbol, which indicates to the C program that the
585 getprotobynumber() routine is available to look up protocols
588 d_getpent (d_getpent.U):
589 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
590 available to look up protocols in some data base or another.
592 d_getpgid (d_getpgid.U):
593 This variable conditionally defines the HAS_GETPGID symbol, which
594 indicates to the C program that the getpgid(pid) function
595 is available to get the process group id.
597 d_getpgrp2 (d_getpgrp2.U):
598 This variable conditionally defines the HAS_GETPGRP2 symbol, which
599 indicates to the C program that the getpgrp2() (as in DG/UX) routine
600 is available to get the current process group.
602 d_getpgrp (d_getpgrp.U):
603 This variable conditionally defines HAS_GETPGRP if getpgrp() is
604 available to get the current process group.
606 d_getppid (d_getppid.U):
607 This variable conditionally defines the HAS_GETPPID symbol, which
608 indicates to the C program that the getppid() routine is available
609 to get the parent process ID.
611 d_getprior (d_getprior.U):
612 This variable conditionally defines HAS_GETPRIORITY if getpriority()
613 is available to get a process's priority.
615 d_getprotoprotos (d_getprotoprotos.U):
616 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
617 which indicates to the C program that <netdb.h> supplies
618 prototypes for the various getproto*() functions.
619 See also netdbtype.U for probing for various netdb types.
621 d_getpwent (d_getpwent.U):
622 This variable conditionally defines the HAS_GETPWENT symbol, which
623 indicates to the C program that the getpwent() routine is available
624 for sequential access of the passwd database.
626 d_getsbyname (d_getsrvby.U):
627 This variable conditionally defines the HAS_GETSERVBYNAME
628 symbol, which indicates to the C program that the
629 getservbyname() routine is available to look up services
632 d_getsbyport (d_getsrvby.U):
633 This variable conditionally defines the HAS_GETSERVBYPORT
634 symbol, which indicates to the C program that the
635 getservbyport() routine is available to look up services
638 d_getsent (d_getsent.U):
639 This variable conditionally defines HAS_GETSERVENT if getservent() is
640 available to look up network services in some data base or another.
642 d_getservprotos (d_getservprotos.U):
643 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
644 which indicates to the C program that <netdb.h> supplies
645 prototypes for the various getserv*() functions.
646 See also netdbtype.U for probing for various netdb types.
648 d_gettimeod (d_ftime.U):
649 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
650 indicates that the gettimeofday() system call exists (to obtain a
651 sub-second accuracy clock). You should probably include <sys/resource.h>.
653 d_gnulibc (d_gnulibc.U):
654 Defined if we're dealing with the GNU C Library.
656 d_grpasswd (i_grp.U):
657 This variable conditionally defines GRPASSWD, which indicates
658 that struct group in <grp.h> contains gr_passwd.
660 d_hasmntopt (d_hasmntopt.U):
661 This variable conditionally defines the HAS_HASMNTOPT symbol, which
662 indicates to the C program that the hasmntopt() routine is available
663 to query the mount options of file systems.
666 This variable conditionally defines HAS_HTONL if htonl() and its
667 friends are available to do network order byte swapping.
669 d_index (d_strchr.U):
670 This variable conditionally defines HAS_INDEX if index() and
671 rindex() are available for string searching.
673 d_inetaton (d_inetaton.U):
674 This variable conditionally defines the HAS_INET_ATON symbol, which
675 indicates to the C program that the inet_aton() function is available
676 to parse IP address "dotted-quad" strings.
678 d_isascii (d_isascii.U):
679 This variable conditionally defines the HAS_ISASCII constant,
680 which indicates to the C program that isascii() is available.
682 d_killpg (d_killpg.U):
683 This variable conditionally defines the HAS_KILLPG symbol, which
684 indicates to the C program that the killpg() routine is available
685 to kill process groups.
687 d_lchown (d_lchown.U):
688 This variable conditionally defines the HAS_LCHOWN symbol, which
689 indicates to the C program that the lchown() routine is available
690 to operate on a symbolic link (instead of following the link).
693 This variable conditionally defines HAS_LINK if link() is
694 available to create hard links.
696 d_locconv (d_locconv.U):
697 This variable conditionally defines HAS_LOCALECONV if localeconv() is
698 available for numeric and monetary formatting conventions.
701 This variable conditionally defines HAS_LOCKF if lockf() is
702 available to do file locking.
704 d_longdbl (d_longdbl.U):
705 This variable conditionally defines HAS_LONG_DOUBLE if
706 the long double type is supported.
708 d_longlong (d_longlong.U):
709 This variable conditionally defines HAS_LONG_LONG if
710 the long long type is supported.
713 This variable conditionally defines HAS_LSTAT if lstat() is
714 available to do file stats on symbolic links.
717 This variable conditionally defines the HAS_MBLEN symbol, which
718 indicates to the C program that the mblen() routine is available
719 to find the number of bytes in a multibye character.
721 d_mbstowcs (d_mbstowcs.U):
722 This variable conditionally defines the HAS_MBSTOWCS symbol, which
723 indicates to the C program that the mbstowcs() routine is available
724 to convert a multibyte string into a wide character string.
726 d_mbtowc (d_mbtowc.U):
727 This variable conditionally defines the HAS_MBTOWC symbol, which
728 indicates to the C program that the mbtowc() routine is available
729 to convert multibyte to a wide character.
731 d_memcmp (d_memcmp.U):
732 This variable conditionally defines the HAS_MEMCMP symbol, which
733 indicates to the C program that the memcmp() routine is available
734 to compare blocks of memory.
736 d_memcpy (d_memcpy.U):
737 This variable conditionally defines the HAS_MEMCPY symbol, which
738 indicates to the C program that the memcpy() routine is available
739 to copy blocks of memory.
741 d_memmove (d_memmove.U):
742 This variable conditionally defines the HAS_MEMMOVE symbol, which
743 indicates to the C program that the memmove() routine is available
744 to copy potentatially overlapping blocks of memory.
746 d_memset (d_memset.U):
747 This variable conditionally defines the HAS_MEMSET symbol, which
748 indicates to the C program that the memset() routine is available
749 to set blocks of memory.
752 This variable conditionally defines the HAS_MKDIR symbol, which
753 indicates to the C program that the mkdir() routine is available
754 to create directories..
756 d_mkfifo (d_mkfifo.U):
757 This variable conditionally defines the HAS_MKFIFO symbol, which
758 indicates to the C program that the mkfifo() routine is available.
760 d_mktime (d_mktime.U):
761 This variable conditionally defines the HAS_MKTIME symbol, which
762 indicates to the C program that the mktime() routine is available.
765 This variable conditionally defines the HAS_MSG symbol, which
766 indicates that the entire msg*(2) library is present.
768 d_msgctl (d_msgctl.U):
769 This variable conditionally defines the HAS_MSGCTL symbol, which
770 indicates to the C program that the msgctl() routine is available.
772 d_msgget (d_msgget.U):
773 This variable conditionally defines the HAS_MSGGET symbol, which
774 indicates to the C program that the msgget() routine is available.
776 d_msgrcv (d_msgrcv.U):
777 This variable conditionally defines the HAS_MSGRCV symbol, which
778 indicates to the C program that the msgrcv() routine is available.
780 d_msgsnd (d_msgsnd.U):
781 This variable conditionally defines the HAS_MSGSND symbol, which
782 indicates to the C program that the msgsnd() routine is available.
784 d_mymalloc (mallocsrc.U):
785 This variable conditionally defines MYMALLOC in case other parts
786 of the source want to take special action if MYMALLOC is used.
787 This may include different sorts of profiling or error detection.
790 This variable conditionally defines the HAS_NICE symbol, which
791 indicates to the C program that the nice() routine is available.
793 d_oldpthreads (usethreads.U):
794 This variable conditionally defines the OLD_PTHREADS_API symbol,
795 and indicates that Perl should be built to use the old
796 draft POSIX threads API. This is only potneially meaningful if
799 d_oldsock (d_socket.U):
800 This variable conditionally defines the OLDSOCKET symbol, which
801 indicates that the BSD socket interface is based on 4.1c and not 4.2.
804 This variable conditionally defines the HAS_OPEN3 manifest constant,
805 which indicates to the C program that the 3 argument version of
806 the open(2) function is available.
808 d_pathconf (d_pathconf.U):
809 This variable conditionally defines the HAS_PATHCONF symbol, which
810 indicates to the C program that the pathconf() routine is available
811 to determine file-system related limits and options associated
812 with a given filename.
815 This variable conditionally defines the HAS_PAUSE symbol, which
816 indicates to the C program that the pause() routine is available
817 to suspend a process until a signal is received.
819 d_phostname (d_gethname.U):
820 This variable conditionally defines the PHOSTNAME symbol, which
821 contains the shell command which, when fed to popen(), may be
822 used to derive the host name.
825 This variable conditionally defines the HAS_PIPE symbol, which
826 indicates to the C program that the pipe() routine is available
827 to create an inter-process channel.
830 This variable conditionally defines the HAS_POLL symbol, which
831 indicates to the C program that the poll() routine is available
832 to poll active file descriptors.
834 d_portable (d_portable.U):
835 This variable conditionally defines the PORTABLE symbol, which
836 indicates to the C program that it should not assume that it is
837 running on the machine it was compiled on.
839 d_pthread_yield (d_pthread_y.U):
840 This variable conditionally defines the HAS_PTHREAD_YIELD
841 symbol if the pthread_yield routine is available to yield
842 the execution of the current thread.
844 d_pthreads_created_joinable (d_pthreadj.U):
845 This variable conditionally defines the PTHREADS_CREATED_JOINABLE
846 symbol if pthreads are created in the joinable (aka undetached)
850 This variable conditionally defines PWAGE, which indicates
851 that struct passwd contains pw_age.
853 d_pwchange (i_pwd.U):
854 This variable conditionally defines PWCHANGE, which indicates
855 that struct passwd contains pw_change.
858 This variable conditionally defines PWCLASS, which indicates
859 that struct passwd contains pw_class.
861 d_pwcomment (i_pwd.U):
862 This variable conditionally defines PWCOMMENT, which indicates
863 that struct passwd contains pw_comment.
865 d_pwexpire (i_pwd.U):
866 This variable conditionally defines PWEXPIRE, which indicates
867 that struct passwd contains pw_expire.
870 This variable conditionally defines PWGECOS, which indicates
871 that struct passwd contains pw_gecos.
873 d_pwpasswd (i_pwd.U):
874 This variable conditionally defines PWPASSWD, which indicates
875 that struct passwd contains pw_passwd.
878 This variable conditionally defines PWQUOTA, which indicates
879 that struct passwd contains pw_quota.
881 d_readdir (d_readdir.U):
882 This variable conditionally defines HAS_READDIR if readdir() is
883 available to read directory entries.
885 d_readlink (d_readlink.U):
886 This variable conditionally defines the HAS_READLINK symbol, which
887 indicates to the C program that the readlink() routine is available
888 to read the value of a symbolic link.
890 d_rename (d_rename.U):
891 This variable conditionally defines the HAS_RENAME symbol, which
892 indicates to the C program that the rename() routine is available
895 d_rewinddir (d_readdir.U):
896 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
900 This variable conditionally defines HAS_RMDIR if rmdir() is
901 available to remove directories.
903 d_safebcpy (d_safebcpy.U):
904 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
905 the bcopy() routine can do overlapping copies.
907 d_safemcpy (d_safemcpy.U):
908 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
909 the memcpy() routine can do overlapping copies.
911 d_sanemcmp (d_sanemcmp.U):
912 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
913 the memcpy() routine is available and can be used to compare relative
914 magnitudes of chars with their high bits set.
916 d_sched_yield (d_pthread_y.U):
917 This variable conditionally defines the HAS_SCHED_YIELD
918 symbol if the sched_yield routine is available to yield
919 the execution of the current thread.
921 d_seekdir (d_readdir.U):
922 This variable conditionally defines HAS_SEEKDIR if seekdir() is
925 d_select (d_select.U):
926 This variable conditionally defines HAS_SELECT if select() is
927 available to select active file descriptors. A <sys/time.h>
928 inclusion may be necessary for the timeout field.
931 This variable conditionally defines the HAS_SEM symbol, which
932 indicates that the entire sem*(2) library is present.
934 d_semctl (d_semctl.U):
935 This variable conditionally defines the HAS_SEMCTL symbol, which
936 indicates to the C program that the semctl() routine is available.
938 d_semctl_semid_ds (d_union_senum.U):
939 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
940 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
942 d_semctl_semun (d_union_senum.U):
943 This variable conditionally defines USE_SEMCTL_SEMUN, which
944 indicates that union semun is to be used for semctl IPC_STAT.
946 d_semget (d_semget.U):
947 This variable conditionally defines the HAS_SEMGET symbol, which
948 indicates to the C program that the semget() routine is available.
951 This variable conditionally defines the HAS_SEMOP symbol, which
952 indicates to the C program that the semop() routine is available.
954 d_setegid (d_setegid.U):
955 This variable conditionally defines the HAS_SETEGID symbol, which
956 indicates to the C program that the setegid() routine is available
957 to change the effective gid of the current program.
959 d_seteuid (d_seteuid.U):
960 This variable conditionally defines the HAS_SETEUID symbol, which
961 indicates to the C program that the seteuid() routine is available
962 to change the effective uid of the current program.
964 d_setgrent (d_setgrent.U):
965 This variable conditionally defines the HAS_SETGRENT symbol, which
966 indicates to the C program that the setgrent() routine is available
967 for initializing sequential access to the group database.
969 d_setgrps (d_setgrps.U):
970 This variable conditionally defines the HAS_SETGROUPS symbol, which
971 indicates to the C program that the setgroups() routine is available
972 to set the list of process groups.
974 d_sethent (d_sethent.U):
975 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
978 d_setlinebuf (d_setlnbuf.U):
979 This variable conditionally defines the HAS_SETLINEBUF symbol, which
980 indicates to the C program that the setlinebuf() routine is available
981 to change stderr or stdout from block-buffered or unbuffered to a
984 d_setlocale (d_setlocale.U):
985 This variable conditionally defines HAS_SETLOCALE if setlocale() is
986 available to handle locale-specific ctype implementations.
988 d_setnent (d_setnent.U):
989 This variable conditionally defines HAS_SETNETENT if setnetent() is
992 d_setpent (d_setpent.U):
993 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
996 d_setpgid (d_setpgid.U):
997 This variable conditionally defines the HAS_SETPGID symbol if the
998 setpgid(pid, gpid) function is available to set process group ID.
1000 d_setpgrp2 (d_setpgrp2.U):
1001 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1002 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1003 is available to set the current process group.
1005 d_setpgrp (d_setpgrp.U):
1006 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1007 available to set the current process group.
1009 d_setprior (d_setprior.U):
1010 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1011 is available to set a process's priority.
1013 d_setpwent (d_setpwent.U):
1014 This variable conditionally defines the HAS_SETPWENT symbol, which
1015 indicates to the C program that the setpwent() routine is available
1016 for initializing sequential access to the passwd database.
1018 d_setregid (d_setregid.U):
1019 This variable conditionally defines HAS_SETREGID if setregid() is
1020 available to change the real and effective gid of the current
1023 d_setresgid (d_setregid.U):
1024 This variable conditionally defines HAS_SETRESGID if setresgid() is
1025 available to change the real, effective and saved gid of the current
1028 d_setresuid (d_setreuid.U):
1029 This variable conditionally defines HAS_SETREUID if setresuid() is
1030 available to change the real, effective and saved uid of the current
1033 d_setreuid (d_setreuid.U):
1034 This variable conditionally defines HAS_SETREUID if setreuid() is
1035 available to change the real and effective uid of the current
1038 d_setrgid (d_setrgid.U):
1039 This variable conditionally defines the HAS_SETRGID symbol, which
1040 indicates to the C program that the setrgid() routine is available
1041 to change the real gid of the current program.
1043 d_setruid (d_setruid.U):
1044 This variable conditionally defines the HAS_SETRUID symbol, which
1045 indicates to the C program that the setruid() routine is available
1046 to change the real uid of the current program.
1048 d_setsent (d_setsent.U):
1049 This variable conditionally defines HAS_SETSERVENT if setservent() is
1052 d_setsid (d_setsid.U):
1053 This variable conditionally defines HAS_SETSID if setsid() is
1054 available to set the process group ID.
1056 d_setvbuf (d_setvbuf.U):
1057 This variable conditionally defines the HAS_SETVBUF symbol, which
1058 indicates to the C program that the setvbuf() routine is available
1059 to change buffering on an open stdio stream.
1062 This variable conditionally defines the USE_SFIO symbol,
1063 and indicates whether sfio is available (and should be used).
1066 This variable conditionally defines the HAS_SHM symbol, which
1067 indicates that the entire shm*(2) library is present.
1069 d_shmat (d_shmat.U):
1070 This variable conditionally defines the HAS_SHMAT symbol, which
1071 indicates to the C program that the shmat() routine is available.
1073 d_shmatprototype (d_shmat.U):
1074 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1075 symbol, which indicates that sys/shm.h has a prototype for
1078 d_shmctl (d_shmctl.U):
1079 This variable conditionally defines the HAS_SHMCTL symbol, which
1080 indicates to the C program that the shmctl() routine is available.
1082 d_shmdt (d_shmdt.U):
1083 This variable conditionally defines the HAS_SHMDT symbol, which
1084 indicates to the C program that the shmdt() routine is available.
1086 d_shmget (d_shmget.U):
1087 This variable conditionally defines the HAS_SHMGET symbol, which
1088 indicates to the C program that the shmget() routine is available.
1090 d_sigaction (d_sigaction.U):
1091 This variable conditionally defines the HAS_SIGACTION symbol, which
1092 indicates that the Vr4 sigaction() routine is available.
1094 d_sigsetjmp (d_sigsetjmp.U):
1095 This variable conditionally defines the HAS_SIGSETJMP symbol,
1096 which indicates that the sigsetjmp() routine is available to
1097 call setjmp() and optionally save the process's signal mask.
1099 d_socket (d_socket.U):
1100 This variable conditionally defines HAS_SOCKET, which indicates
1101 that the BSD socket interface is supported.
1103 d_sockpair (d_socket.U):
1104 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1105 indicates that the BSD socketpair() is supported.
1107 d_statblks (d_statblks.U):
1108 This variable conditionally defines USE_STAT_BLOCKS if this system
1109 has a stat structure declaring st_blksize and st_blocks.
1111 d_statfsflags (d_statfs.U):
1112 This variable conditionally defines the HAS_STRUCT_STATFS_FLAGS
1113 symbol, which indicates to struct statfs from has f_flags member.
1114 This kind of struct statfs is coming from sys/mount.h (BSD),
1115 not from sys/statfs.h (SYSV).
1117 d_statvfs (d_statvfs.U):
1118 This variable conditionally defines the HAS_STATVFS symbol, which
1119 indicates to the C program that the statvfs() routine is available.
1121 d_stdio_cnt_lval (d_stdstdio.U):
1122 This variable conditionally defines STDIO_CNT_LVALUE if the
1123 FILE_cnt macro can be used as an lvalue.
1125 d_stdio_ptr_lval (d_stdstdio.U):
1126 This variable conditionally defines STDIO_PTR_LVALUE if the
1127 FILE_ptr macro can be used as an lvalue.
1129 d_stdiobase (d_stdstdio.U):
1130 This variable conditionally defines USE_STDIO_BASE if this system
1131 has a FILE structure declaring a usable _base field (or equivalent)
1134 d_stdstdio (d_stdstdio.U):
1135 This variable conditionally defines USE_STDIO_PTR if this system
1136 has a FILE structure declaring usable _ptr and _cnt fields (or
1137 equivalent) in stdio.h.
1139 d_strchr (d_strchr.U):
1140 This variable conditionally defines HAS_STRCHR if strchr() and
1141 strrchr() are available for string searching.
1143 d_strcoll (d_strcoll.U):
1144 This variable conditionally defines HAS_STRCOLL if strcoll() is
1145 available to compare strings using collating information.
1147 d_strctcpy (d_strctcpy.U):
1148 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1149 indicates to the C program that this C compiler knows how to copy
1152 d_strerrm (d_strerror.U):
1153 This variable holds what Strerrr is defined as to translate an error
1154 code condition into an error message string. It could be 'strerror'
1155 or a more complex macro emulating strrror with sys_errlist[], or the
1156 "unknown" string when both strerror and sys_errlist are missing.
1158 d_strerror (d_strerror.U):
1159 This variable conditionally defines HAS_STRERROR if strerror() is
1160 available to translate error numbers to strings.
1162 d_strtod (d_strtod.U):
1163 This variable conditionally defines the HAS_STRTOD symbol, which
1164 indicates to the C program that the strtod() routine is available
1165 to provide better numeric string conversion than atof().
1167 d_strtol (d_strtol.U):
1168 This variable conditionally defines the HAS_STRTOL symbol, which
1169 indicates to the C program that the strtol() routine is available
1170 to provide better numeric string conversion than atoi() and friends.
1172 d_strtoul (d_strtoul.U):
1173 This variable conditionally defines the HAS_STRTOUL symbol, which
1174 indicates to the C program that the strtoul() routine is available
1175 to provide conversion of strings to unsigned long.
1177 d_strxfrm (d_strxfrm.U):
1178 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1179 available to transform strings.
1181 d_suidsafe (d_dosuid.U):
1182 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1183 if setuid scripts can be secure. This test looks in /dev/fd/.
1185 d_symlink (d_symlink.U):
1186 This variable conditionally defines the HAS_SYMLINK symbol, which
1187 indicates to the C program that the symlink() routine is available
1188 to create symbolic links.
1190 d_syscall (d_syscall.U):
1191 This variable conditionally defines HAS_SYSCALL if syscall() is
1192 available call arbitrary system calls.
1194 d_sysconf (d_sysconf.U):
1195 This variable conditionally defines the HAS_SYSCONF symbol, which
1196 indicates to the C program that the sysconf() routine is available
1197 to determine system related limits and options.
1199 d_sysernlst (d_strerror.U):
1200 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1201 is available to translate error numbers to the symbolic name.
1203 d_syserrlst (d_strerror.U):
1204 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1205 available to translate error numbers to strings.
1207 d_system (d_system.U):
1208 This variable conditionally defines HAS_SYSTEM if system() is
1209 available to issue a shell command.
1211 d_tcgetpgrp (d_tcgtpgrp.U):
1212 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1213 indicates to the C program that the tcgetpgrp() routine is available.
1214 to get foreground process group ID.
1216 d_tcsetpgrp (d_tcstpgrp.U):
1217 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1218 indicates to the C program that the tcsetpgrp() routine is available
1219 to set foreground process group ID.
1221 d_telldir (d_readdir.U):
1222 This variable conditionally defines HAS_TELLDIR if telldir() is
1226 This variable conditionally defines the HAS_TIME symbol, which indicates
1227 that the time() routine exists. The time() routine is normaly
1228 provided on UNIX systems.
1230 d_times (d_times.U):
1231 This variable conditionally defines the HAS_TIMES symbol, which indicates
1232 that the times() routine exists. The times() routine is normaly
1233 provided on UNIX systems. You may have to include <sys/times.h>.
1235 d_truncate (d_truncate.U):
1236 This variable conditionally defines HAS_TRUNCATE if truncate() is
1237 available to truncate files.
1239 d_tzname (d_tzname.U):
1240 This variable conditionally defines HAS_TZNAME if tzname[] is
1241 available to access timezone names.
1243 d_umask (d_umask.U):
1244 This variable conditionally defines the HAS_UMASK symbol, which
1245 indicates to the C program that the umask() routine is available.
1246 to set and get the value of the file creation mask.
1248 d_uname (d_gethname.U):
1249 This variable conditionally defines the HAS_UNAME symbol, which
1250 indicates to the C program that the uname() routine may be
1251 used to derive the host name.
1253 d_union_semun (d_union_senum.U):
1254 This variable conditionally defines HAS_UNION_SEMUN if the
1255 union semun is defined by including <sys/sem.h>.
1257 d_vfork (d_vfork.U):
1258 This variable conditionally defines the HAS_VFORK symbol, which
1259 indicates the vfork() routine is available.
1261 d_void_closedir (d_closedir.U):
1262 This variable conditionally defines VOID_CLOSEDIR if closedir()
1263 does not return a value.
1265 d_voidsig (d_voidsig.U):
1266 This variable conditionally defines VOIDSIG if this system
1267 declares "void (*signal(...))()" in signal.h. The old way was to
1268 declare it as "int (*signal(...))()".
1270 d_voidtty (i_sysioctl.U):
1271 This variable conditionally defines USE_IOCNOTTY to indicate that the
1272 ioctl() call with TIOCNOTTY should be used to void tty association.
1273 Otherwise (on USG probably), it is enough to close the standard file
1274 decriptors and do a setpgrp().
1276 d_volatile (d_volatile.U):
1277 This variable conditionally defines the HASVOLATILE symbol, which
1278 indicates to the C program that this C compiler knows about the
1279 volatile declaration.
1281 d_vprintf (d_vprintf.U):
1282 This variable conditionally defines the HAS_VPRINTF symbol, which
1283 indicates to the C program that the vprintf() routine is available
1284 to printf with a pointer to an argument list.
1286 d_wait4 (d_wait4.U):
1287 This variable conditionally defines the HAS_WAIT4 symbol, which
1288 indicates the wait4() routine is available.
1290 d_waitpid (d_waitpid.U):
1291 This variable conditionally defines HAS_WAITPID if waitpid() is
1292 available to wait for child process.
1294 d_wcstombs (d_wcstombs.U):
1295 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1296 indicates to the C program that the wcstombs() routine is available
1297 to convert wide character strings to multibyte strings.
1299 d_wctomb (d_wctomb.U):
1300 This variable conditionally defines the HAS_WCTOMB symbol, which
1301 indicates to the C program that the wctomb() routine is available
1302 to convert a wide character to a multibyte.
1305 This variable conditionally defines the symbol XENIX, which alerts
1306 the C program that it runs under Xenix.
1309 This variable is used internally by Configure to determine the
1310 full pathname (if any) of the date program. After Configure runs,
1311 the value is reset to a plain "date" and is not useful.
1313 db_hashtype (i_db.U):
1314 This variable contains the type of the hash structure element
1315 in the <db.h> header file. In older versions of DB, it was
1316 int, while in newer ones it is u_int32_t.
1318 db_prefixtype (i_db.U):
1319 This variable contains the type of the prefix structure element
1320 in the <db.h> header file. In older versions of DB, it was
1321 int, while in newer ones it is size_t.
1323 direntrytype (i_dirent.U):
1324 This symbol is set to 'struct direct' or 'struct dirent' depending on
1325 whether dirent is available or not. You should use this pseudo type to
1326 portably declare your directory entries.
1329 This variable contains the extension that is to be used for the
1330 dynamically loaded modules that perl generaties.
1333 This variable contains the name of the dynamic loading file that
1334 will be used with the package.
1336 doublesize (doublesize.U):
1337 This variable contains the value of the DOUBLESIZE symbol, which
1338 indicates to the C program how many bytes there are in a double.
1340 dynamic_ext (Extensions.U):
1341 This variable holds a list of XS extension files we want to
1342 link dynamically into the package. It is used by Makefile.
1344 eagain (nblock_io.U):
1345 This variable bears the symbolic errno code set by read() when no
1346 data is present on the file and non-blocking I/O was enabled (otherwise,
1347 read() blocks naturally).
1350 This variable conditionally defines EBCDIC if this
1351 system uses EBCDIC encoding. Among other things, this
1352 means that the character ranges are not contiguous.
1356 This variable is used internally by Configure to determine the
1357 full pathname (if any) of the echo program. After Configure runs,
1358 the value is reset to a plain "echo" and is not useful.
1361 This variable is used internally by Configure to determine the
1362 full pathname (if any) of the egrep program. After Configure runs,
1363 the value is reset to a plain "egrep" and is not useful.
1366 This variable is defined but not used by Configure.
1367 The value is a plain '' and is not useful.
1370 When running under Eunice this variable contains a command which will
1371 convert a shell script to the proper form of text file for it to be
1372 executable by the shell. On other systems it is a no-op.
1375 This is an old synonym for _exe.
1378 This variable is used internally by Configure to determine the
1379 full pathname (if any) of the expr program. After Configure runs,
1380 the value is reset to a plain "expr" and is not useful.
1382 extensions (Extensions.U):
1383 This variable holds a list of all extension files (both XS and
1384 non-xs linked into the package. It is propagated to Config.pm
1385 and is typically used to test whether a particular extesion
1389 This variable is used internally by Configure to determine the
1390 full pathname (if any) of the find program. After Configure runs,
1391 the value is reset to a plain "find" and is not useful.
1393 firstmakefile (Unix.U):
1394 This variable defines the first file searched by make. On unix,
1395 it is makefile (then Makefile). On case-insensitive systems,
1396 it might be something else. This is only used to deal with
1397 convoluted make depend tricks.
1400 This variable is defined but not used by Configure.
1401 The value is a plain '' and is not useful.
1403 fpostype (fpostype.U):
1404 This variable defines Fpos_t to be something like fpost_t, long,
1405 uint, or whatever type is used to declare file positions in libc.
1407 freetype (mallocsrc.U):
1408 This variable contains the return type of free(). It is usually
1409 void, but occasionally int.
1412 This variable contains the full pathname to 'ar', whether or
1413 not the user has specified 'portability'. This is only used
1417 This variable contains the full pathname to 'csh', whether or
1418 not the user has specified 'portability'. This is only used
1419 in the compiled C program, and we assume that all systems which
1420 can share this executable will have the same full pathname to
1423 full_sed (Loc_sed.U):
1424 This variable contains the full pathname to 'sed', whether or
1425 not the user has specified 'portability'. This is only used
1426 in the compiled C program, and we assume that all systems which
1427 can share this executable will have the same full pathname to
1431 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1432 indicate whether the compiler is version 1 or 2. This is used in
1433 setting some of the default cflags. It is set to '' if not gcc.
1435 gidtype (gidtype.U):
1436 This variable defines Gid_t to be something like gid_t, int,
1437 ushort, or whatever type is used to declare the return type
1438 of getgid(). Typically, it is the type of group ids in the kernel.
1441 This variable is used internally by Configure to determine the
1442 full pathname (if any) of the grep program. After Configure runs,
1443 the value is reset to a plain "grep" and is not useful.
1446 This variable contains a command that produces the text of the
1447 /etc/group file. This is normally "cat /etc/group", but can be
1448 "ypcat group" when NIS is used.
1450 groupstype (groupstype.U):
1451 This variable defines Groups_t to be something like gid_t, int,
1452 ushort, or whatever type is used for the second argument to
1453 getgroups() and setgroups(). Usually, this is the same as
1454 gidtype (gid_t), but sometimes it isn't.
1457 This variable is used internally by Configure to determine the
1458 full pathname (if any) of the gzip program. After Configure runs,
1459 the value is reset to a plain "gzip" and is not useful.
1461 h_fcntl (h_fcntl.U):
1462 This is variable gets set in various places to tell i_fcntl that
1463 <fcntl.h> should be included.
1465 h_sysfile (h_sysfile.U):
1466 This is variable gets set in various places to tell i_sys_file that
1467 <sys/file.h> should be included.
1470 Gives the type of hints used for previous answers. May be one of
1471 "default", "recommended" or "previous".
1474 This variable contains a command that produces the text of the
1475 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1476 "ypcat hosts" when NIS is used.
1479 This variable contains a flag which will tell the C compiler and loader
1480 to produce a program running with a huge memory model. If the
1481 huge model is not supported, contains the flag to produce large
1482 model programs. It is up to the Makefile to use this.
1484 i_arpainet (i_arpainet.U):
1485 This variable conditionally defines the I_ARPA_INET symbol,
1486 and indicates whether a C program should include <arpa/inet.h>.
1488 i_bsdioctl (i_sysioctl.U):
1489 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1490 indicates to the C program that <sys/bsdioctl.h> exists and should
1494 This variable conditionally defines the I_DB symbol, and indicates
1495 whether a C program may include Berkeley's DB include file <db.h>.
1498 This variable conditionally defines the I_DBM symbol, which
1499 indicates to the C program that <dbm.h> exists and should
1502 i_dirent (i_dirent.U):
1503 This variable conditionally defines I_DIRENT, which indicates
1504 to the C program that it should include <dirent.h>.
1507 This variable conditionally defines the I_DLD symbol, which
1508 indicates to the C program that <dld.h> (GNU dynamic loading)
1509 exists and should be included.
1511 i_dlfcn (i_dlfcn.U):
1512 This variable conditionally defines the I_DLFCN symbol, which
1513 indicates to the C program that <dlfcn.h> exists and should
1516 i_fcntl (i_fcntl.U):
1517 This variable controls the value of I_FCNTL (which tells
1518 the C program to include <fcntl.h>).
1520 i_float (i_float.U):
1521 This variable conditionally defines the I_FLOAT symbol, and indicates
1522 whether a C program may include <float.h> to get symbols like DBL_MAX
1523 or DBL_MIN, i.e. machine dependent floating point values.
1526 This variable conditionally defines the I_GDBM symbol, which
1527 indicates to the C program that <gdbm.h> exists and should
1531 This variable conditionally defines the I_GRP symbol, and indicates
1532 whether a C program should include <grp.h>.
1534 i_limits (i_limits.U):
1535 This variable conditionally defines the I_LIMITS symbol, and indicates
1536 whether a C program may include <limits.h> to get symbols like WORD_BIT
1539 i_locale (i_locale.U):
1540 This variable conditionally defines the I_LOCALE symbol,
1541 and indicates whether a C program should include <locale.h>.
1543 i_machcthr (i_machcthr.U):
1544 This variable conditionally defines the I_MACH_CTHREADS symbol,
1545 and indicates whether a C program should include <mach/cthreads.h>.
1547 i_malloc (i_malloc.U):
1548 This variable conditionally defines the I_MALLOC symbol, and indicates
1549 whether a C program should include <malloc.h>.
1552 This variable conditionally defines the I_MATH symbol, and indicates
1553 whether a C program may include <math.h>.
1555 i_memory (i_memory.U):
1556 This variable conditionally defines the I_MEMORY symbol, and indicates
1557 whether a C program should include <memory.h>.
1559 i_mntent (i_mntent.U):
1560 This variable conditionally defines the I_MNTENT symbol, and indicates
1561 whether a C program should include <mntent.h>.
1564 This variable conditionally defines the I_NDBM symbol, which
1565 indicates to the C program that <ndbm.h> exists and should
1568 i_netdb (i_netdb.U):
1569 This variable conditionally defines the I_NETDB symbol, and indicates
1570 whether a C program should include <netdb.h>.
1572 i_neterrno (i_neterrno.U):
1573 This variable conditionally defines the I_NET_ERRNO symbol, which
1574 indicates to the C program that <net/errno.h> exists and should
1578 This variable conditionally defines I_NETINET_IN, which indicates
1579 to the C program that it should include <netinet/in.h>. Otherwise,
1580 you may try <sys/in.h>.
1583 This variable conditionally defines I_PWD, which indicates
1584 to the C program that it should include <pwd.h>.
1586 i_rpcsvcdbm (i_dbm.U):
1587 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1588 indicates to the C program that <rpcsvc/dbm.h> exists and should
1589 be included. Some System V systems might need this instead of <dbm.h>.
1592 This variable conditionally defines the I_SFIO symbol,
1593 and indicates whether a C program should include <sfio.h>.
1595 i_sgtty (i_termio.U):
1596 This variable conditionally defines the I_SGTTY symbol, which
1597 indicates to the C program that it should include <sgtty.h> rather
1600 i_stdarg (i_varhdr.U):
1601 This variable conditionally defines the I_STDARG symbol, which
1602 indicates to the C program that <stdarg.h> exists and should
1605 i_stddef (i_stddef.U):
1606 This variable conditionally defines the I_STDDEF symbol, which
1607 indicates to the C program that <stddef.h> exists and should
1610 i_stdlib (i_stdlib.U):
1611 This variable conditionally defines the I_STDLIB symbol, which
1612 indicates to the C program that <stdlib.h> exists and should
1615 i_string (i_string.U):
1616 This variable conditionally defines the I_STRING symbol, which
1617 indicates that <string.h> should be included rather than <strings.h>.
1619 i_sysdir (i_sysdir.U):
1620 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1621 whether a C program should include <sys/dir.h>.
1623 i_sysfile (i_sysfile.U):
1624 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1625 whether a C program should include <sys/file.h> to get R_OK and friends.
1627 i_sysfilio (i_sysioctl.U):
1628 This variable conditionally defines the I_SYS_FILIO symbol, which
1629 indicates to the C program that <sys/filio.h> exists and should
1630 be included in preference to <sys/ioctl.h>.
1633 This variable conditionally defines I_SYS_IN, which indicates
1634 to the C program that it should include <sys/in.h> instead of
1637 i_sysioctl (i_sysioctl.U):
1638 This variable conditionally defines the I_SYS_IOCTL symbol, which
1639 indicates to the C program that <sys/ioctl.h> exists and should
1642 i_sysmount (i_sysmount.U):
1643 This variable conditionally defines the I_SYSMOUNT symbol,
1644 and indicates whether a C program should include <sys/mount.h>.
1646 i_sysndir (i_sysndir.U):
1647 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1648 whether a C program should include <sys/ndir.h>.
1650 i_sysparam (i_sysparam.U):
1651 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1652 whether a C program should include <sys/param.h>.
1654 i_sysresrc (i_sysresrc.U):
1655 This variable conditionally defines the I_SYS_RESOURCE symbol,
1656 and indicates whether a C program should include <sys/resource.h>.
1658 i_sysselct (i_sysselct.U):
1659 This variable conditionally defines I_SYS_SELECT, which indicates
1660 to the C program that it should include <sys/select.h> in order to
1661 get the definition of struct timeval.
1663 i_syssockio (i_sysioctl.U):
1664 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1665 C program that socket ioctl codes may be found in <sys/sockio.h>
1666 instead of <sys/ioctl.h>.
1668 i_sysstat (i_sysstat.U):
1669 This variable conditionally defines the I_SYS_STAT symbol,
1670 and indicates whether a C program should include <sys/stat.h>.
1672 i_sysstatfs (i_sysstatfs.U):
1673 This variable conditionally defines the I_SYSSTATFS symbol,
1674 and indicates whether a C program should include <sys/statfs.h>.
1676 i_sysstatvfs (i_sysstatvfs.U):
1677 This variable conditionally defines the I_SYSSTATVFS symbol,
1678 and indicates whether a C program should include <sys/statvfs.h>.
1680 i_systime (i_time.U):
1681 This variable conditionally defines I_SYS_TIME, which indicates
1682 to the C program that it should include <sys/time.h>.
1684 i_systimek (i_time.U):
1685 This variable conditionally defines I_SYS_TIME_KERNEL, which
1686 indicates to the C program that it should include <sys/time.h>
1687 with KERNEL defined.
1689 i_systimes (i_systimes.U):
1690 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1691 whether a C program should include <sys/times.h>.
1693 i_systypes (i_systypes.U):
1694 This variable conditionally defines the I_SYS_TYPES symbol,
1695 and indicates whether a C program should include <sys/types.h>.
1697 i_sysun (i_sysun.U):
1698 This variable conditionally defines I_SYS_UN, which indicates
1699 to the C program that it should include <sys/un.h> to get UNIX
1700 domain socket definitions.
1702 i_syswait (i_syswait.U):
1703 This variable conditionally defines I_SYS_WAIT, which indicates
1704 to the C program that it should include <sys/wait.h>.
1706 i_termio (i_termio.U):
1707 This variable conditionally defines the I_TERMIO symbol, which
1708 indicates to the C program that it should include <termio.h> rather
1711 i_termios (i_termio.U):
1712 This variable conditionally defines the I_TERMIOS symbol, which
1713 indicates to the C program that the POSIX <termios.h> file is
1717 This variable conditionally defines I_TIME, which indicates
1718 to the C program that it should include <time.h>.
1720 i_unistd (i_unistd.U):
1721 This variable conditionally defines the I_UNISTD symbol, and indicates
1722 whether a C program should include <unistd.h>.
1724 i_utime (i_utime.U):
1725 This variable conditionally defines the I_UTIME symbol, and indicates
1726 whether a C program should include <utime.h>.
1728 i_values (i_values.U):
1729 This variable conditionally defines the I_VALUES symbol, and indicates
1730 whether a C program may include <values.h> to get symbols like MAXLONG
1733 i_varargs (i_varhdr.U):
1734 This variable conditionally defines I_VARARGS, which indicates
1735 to the C program that it should include <varargs.h>.
1737 i_varhdr (i_varhdr.U):
1738 Contains the name of the header to be included to get va_dcl definition.
1739 Typically one of varargs.h or stdarg.h.
1741 i_vfork (i_vfork.U):
1742 This variable conditionally defines the I_VFORK symbol, and indicates
1743 whether a C program should include vfork.h.
1745 ignore_versioned_solibs (libs.U):
1746 This variable should be non-empty if non-versioned shared
1747 libraries (libfoo.so.x.y) are to be ignored (because they
1748 cannot be linked against).
1751 This variable must preceed the normal include path to get hte
1752 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
1753 Value can be "" or "/bsd43" on mips.
1756 This variable is defined but not used by Configure.
1757 The value is a plain '' and is not useful.
1759 installarchlib (archlib.U):
1760 This variable is really the same as archlibexp but may differ on
1761 those systems using AFS. For extra portability, only this variable
1762 should be used in makefiles.
1765 This variable is the same as binexp unless AFS is running in which case
1766 the user is explicitely prompted for it. This variable should always
1767 be used in your makefiles for maximum portability.
1769 installman1dir (man1dir.U):
1770 This variable is really the same as man1direxp, unless you are using
1771 AFS in which case it points to the read/write location whereas
1772 man1direxp only points to the read-only access location. For extra
1773 portability, you should only use this variable within your makefiles.
1775 installman3dir (man3dir.U):
1776 This variable is really the same as man3direxp, unless you are using
1777 AFS in which case it points to the read/write location whereas
1778 man3direxp only points to the read-only access location. For extra
1779 portability, you should only use this variable within your makefiles.
1781 installprivlib (privlib.U):
1782 This variable is really the same as privlibexp but may differ on
1783 those systems using AFS. For extra portability, only this variable
1784 should be used in makefiles.
1786 installscript (scriptdir.U):
1787 This variable is usually the same as scriptdirexp, unless you are on
1788 a system running AFS, in which case they may differ slightly. You
1789 should always use this variable within your makefiles for portability.
1791 installsitearch (sitearch.U):
1792 This variable is really the same as sitearchexp but may differ on
1793 those systems using AFS. For extra portability, only this variable
1794 should be used in makefiles.
1796 installsitelib (sitelib.U):
1797 This variable is really the same as sitelibexp but may differ on
1798 those systems using AFS. For extra portability, only this variable
1799 should be used in makefiles.
1801 installusrbinperl (instubperl.U):
1802 This variable tells whether Perl should be installed also as
1803 /usr/bin/perl in addition to
1806 intsize (intsize.U):
1807 This variable contains the value of the INTSIZE symbol, which
1808 indicates to the C program how many bytes there are in an int.
1810 known_extensions (Extensions.U):
1811 This variable holds a list of all XS extensions included in
1815 This variable is defined but not used by Configure.
1816 The value is a plain '' and is not useful.
1819 This variable contains a flag which will tell the C compiler and loader
1820 to produce a program running with a large memory model. It is up to
1821 the Makefile to use this.
1824 This variable indicates the program to be used to link
1825 libraries for dynamic loading. On some systems, it is 'ld'.
1826 On ELF systems, it should be $cc. Mostly, we'll try to respect
1827 the hint file setting.
1829 lddlflags (dlsrc.U):
1830 This variable contains any special flags that might need to be
1831 passed to $ld to create a shared library suitable for dynamic
1832 loading. It is up to the makefile to use it. For hpux, it
1833 should be '-b'. For sunos 4.1, it is empty.
1835 ldflags (ccflags.U):
1836 This variable contains any additional C loader flags desired by
1837 the user. It is up to the Makefile to use this.
1840 This variable is used internally by Configure to determine the
1841 full pathname (if any) of the less program. After Configure runs,
1842 the value is reset to a plain "less" and is not useful.
1845 This is an old synonym for _a.
1848 This variable contains the location of the C library.
1850 libperl (libperl.U):
1851 The perl executable is obtained by linking perlmain.c with
1852 libperl, any static extensions (usually just DynaLoader),
1853 and any other libraries needed on this system. libperl
1854 is usually libperl.a, but can also be libperl.so.xxx if
1855 the user wishes to build a perl executable with a shared
1859 This variable holds the general path used to find libraries. It is
1860 intended to be used by other units.
1863 This variable holds the additional libraries we want to use.
1864 It is up to the Makefile to deal with it.
1866 libswanted (Myinit.U):
1867 This variable holds a list of all the libraries we want to
1868 search. The order is chosen to pick up the c library
1869 ahead of ucb or bsd libraries for SVR4.
1872 This variable is used internally by Configure to determine the
1873 full pathname (if any) of the line program. After Configure runs,
1874 the value is reset to a plain "line" and is not useful.
1877 This variable is defined but not used by Configure.
1878 The value is a plain '' and is not useful.
1880 lkflags (ccflags.U):
1881 This variable contains any additional C partial linker flags desired by
1882 the user. It is up to the Makefile to use this.
1885 This variable is used internally by Configure to determine the
1886 full pathname (if any) of the ln program. After Configure runs,
1887 the value is reset to a plain "ln" and is not useful.
1890 This variable holds the name of the command to make
1891 symbolic links (if they are supported). It can be used
1892 in the Makefile. It is either 'ln -s' or 'ln'
1894 locincpth (ccflags.U):
1895 This variable contains a list of additional directories to be
1896 searched by the compiler. The appropriate '-I' directives will
1897 be added to ccflags. This is intended to simplify setting
1898 local directories from the Configure command line.
1899 It's not much, but it parallels the loclibpth stuff in libpth.U.
1901 loclibpth (libpth.U):
1902 This variable holds the paths used to find local libraries. It is
1903 prepended to libpth, and is intended to be easily set from the
1906 longdblsize (d_longdbl.U):
1907 This variable contains the value of the LONG_DOUBLESIZE symbol, which
1908 indicates to the C program how many bytes there are in a long double,
1909 if this system supports long doubles.
1911 longlongsize (d_longlong.U):
1912 This variable contains the value of the LONGLONGSIZE symbol, which
1913 indicates to the C program how many bytes there are in a long long,
1914 if this system supports long long.
1916 longsize (intsize.U):
1917 This variable contains the value of the LONGSIZE symbol, which
1918 indicates to the C program how many bytes there are in a long.
1921 This variable is defined but not used by Configure.
1922 The value is a plain '' and is not useful.
1925 This variable is defined but not used by Configure.
1926 The value is a plain '' and is not useful.
1929 This variable is used internally by Configure to determine the
1930 full pathname (if any) of the ls program. After Configure runs,
1931 the value is reset to a plain "ls" and is not useful.
1933 lseektype (lseektype.U):
1934 This variable defines lseektype to be something like off_t, long,
1935 or whatever type is used to declare lseek offset's type in the
1936 kernel (which also appears to be lseek's return type).
1939 This variable is defined but not used by Configure.
1940 The value is a plain '' and is not useful.
1943 This variable is defined but not used by Configure.
1944 The value is a plain '' and is not useful.
1947 This variable is used internally by Configure to determine the
1948 full pathname (if any) of the make program. After Configure runs,
1949 the value is reset to a plain "make" and is not useful.
1951 make_set_make (make.U):
1952 Some versions of 'make' set the variable MAKE. Others do not.
1953 This variable contains the string to be included in Makefile.SH
1954 so that MAKE is set if needed, and not if not needed.
1955 Possible values are:
1956 make_set_make='#' # If your make program handles this for you,
1957 make_set_make="MAKE=$make" # if it doesn't.
1958 I used a comment character so that we can distinguish a
1959 'set' value (from a previous config.sh or Configure '-D' option)
1960 from an uncomputed value.
1962 mallocobj (mallocsrc.U):
1963 This variable contains the name of the malloc.o that this package
1964 generates, if that malloc.o is preferred over the system malloc.
1965 Otherwise the value is null. This variable is intended for generating
1966 Makefiles. See mallocsrc.
1968 mallocsrc (mallocsrc.U):
1969 This variable contains the name of the malloc.c that comes with
1970 the package, if that malloc.c is preferred over the system malloc.
1971 Otherwise the value is null. This variable is intended for generating
1974 malloctype (mallocsrc.U):
1975 This variable contains the kind of ptr returned by malloc and realloc.
1977 man1dir (man1dir.U):
1978 This variable contains the name of the directory in which manual
1979 source pages are to be put. It is the responsibility of the
1980 Makefile.SH to get the value of this into the proper command.
1981 You must be prepared to do the ~name expansion yourself.
1983 man1direxp (man1dir.U):
1984 This variable is the same as the man1dir variable, but is filename
1985 expanded at configuration time, for convenient use in makefiles.
1987 man1ext (man1dir.U):
1988 This variable contains the extension that the manual page should
1989 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
1992 man3dir (man3dir.U):
1993 This variable contains the name of the directory in which manual
1994 source pages are to be put. It is the responsibility of the
1995 Makefile.SH to get the value of this into the proper command.
1996 You must be prepared to do the ~name expansion yourself.
1998 man3direxp (man3dir.U):
1999 This variable is the same as the man3dir variable, but is filename
2000 expanded at configuration time, for convenient use in makefiles.
2002 man3ext (man3dir.U):
2003 This variable contains the extension that the manual page should
2004 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2008 This variable contains a flag which will tell the C compiler and loader
2009 to produce a program running with a medium memory model. If the
2010 medium model is not supported, contains the flag to produce large
2011 model programs. It is up to the Makefile to use this.
2013 mips_type (usrinc.U):
2014 This variable holds the environment type for the mips system.
2015 Possible values are "BSD 4.3" and "System V".
2018 This variable is used internally by Configure to determine the
2019 full pathname (if any) of the mkdir program. After Configure runs,
2020 the value is reset to a plain "mkdir" and is not useful.
2023 This variable contains the list of memory models supported by this
2024 system. Possible component values are none, split, unsplit, small,
2025 medium, large, and huge. The component values are space separated.
2027 modetype (modetype.U):
2028 This variable defines modetype to be something like mode_t,
2029 int, unsigned short, or whatever type is used to declare file
2030 modes for system calls.
2033 This variable is used internally by Configure to determine the
2034 full pathname (if any) of the more program. After Configure runs,
2035 the value is reset to a plain "more" and is not useful.
2038 This variable is defined but not used by Configure.
2039 The value is a plain '' and is not useful.
2041 myarchname (archname.U):
2042 This variable holds the architecture name computed by Configure in
2043 a previous run. It is not intended to be perused by any user and
2044 should never be set in a hint file.
2046 mydomain (myhostname.U):
2047 This variable contains the eventual value of the MYDOMAIN symbol,
2048 which is the domain of the host the program is going to run on.
2049 The domain must be appended to myhostname to form a complete host name.
2050 The dot comes with mydomain, and need not be supplied by the program.
2052 myhostname (myhostname.U):
2053 This variable contains the eventual value of the MYHOSTNAME symbol,
2054 which is the name of the host the program is going to run on.
2055 The domain is not kept with hostname, but must be gotten from mydomain.
2056 The dot comes with mydomain, and need not be supplied by the program.
2058 myuname (Oldconfig.U):
2059 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2060 pseudo variables assignments in the output are stripped, thank you. The
2061 whole thing is then lower-cased.
2064 This variable contains the '-n' flag if that is what causes the echo
2065 command to suppress newline. Otherwise it is null. Correct usage is
2066 $echo $n "prompt for a question: $c".
2068 netdb_hlen_type (netdbtype.U):
2069 This variable holds the type used for the 2nd argument to
2070 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2071 This is only useful if you have gethostbyaddr(), naturally.
2073 netdb_host_type (netdbtype.U):
2074 This variable holds the type used for the 1st argument to
2075 gethostbyaddr(). Usually, this is char * or void *, possibly
2076 with or without a const prefix.
2077 This is only useful if you have gethostbyaddr(), naturally.
2079 netdb_name_type (netdbtype.U):
2080 This variable holds the type used for the argument to
2081 gethostbyname(). Usually, this is char * or const char *.
2082 This is only useful if you have gethostbyname(), naturally.
2084 netdb_net_type (netdbtype.U):
2085 This variable holds the type used for the 1st argument to
2086 getnetbyaddr(). Usually, this is int or long.
2087 This is only useful if you have getnetbyaddr(), naturally.
2090 This variable is used internally by Configure to determine the
2091 full pathname (if any) of the nm program. After Configure runs,
2092 the value is reset to a plain "nm" and is not useful.
2095 This variable holds the options that may be necessary for nm.
2097 nm_so_opt (usenm.U):
2098 This variable holds the options that may be necessary for nm
2099 to work on a shared library but that can not be used on an
2100 archive library. Currently, this is only used by Linux, where
2101 nm --dynamic is *required* to get symbols from an ELF library which
2102 has been stripped, but nm --dynamic is *fatal* on an archive library.
2103 Maybe Linux should just always set usenm=false.
2105 nonxs_ext (Extensions.U):
2106 This variable holds a list of all non-xs extensions included
2107 in the package. All of them will be built.
2110 This variable is used internally by Configure to determine the
2111 full pathname (if any) of the nroff program. After Configure runs,
2112 the value is reset to a plain "nroff" and is not useful.
2114 o_nonblock (nblock_io.U):
2115 This variable bears the symbol value to be used during open() or fcntl()
2116 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2117 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2118 but that is only supported by some devices.
2121 This is an old synonym for _o.
2123 optimize (ccflags.U):
2124 This variable contains any optimizer/debugger flag that should be used.
2125 It is up to the Makefile to use it.
2127 orderlib (orderlib.U):
2128 This variable is "true" if the components of libraries must be ordered
2129 (with `lorder $* | tsort`) before placing them in an archive. Set to
2130 "false" if ranlib or ar can generate random libraries.
2132 osname (Oldconfig.U):
2133 This variable contains the operating system name (e.g. sunos,
2134 solaris, hpux, etc.). It can be useful later on for setting
2135 defaults. Any spaces are replaced with underscores. It is set
2136 to a null string if we can't figure it out.
2138 osvers (Oldconfig.U):
2139 This variable contains the operating system version (e.g.
2140 4.1.3, 5.2, etc.). It is primarily used for helping select
2141 an appropriate hints file, but might be useful elsewhere for
2142 setting defaults. It is set to '' if we can't figure it out.
2143 We try to be flexible about how much of the version number
2144 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2145 same for this package, hints files might just be os_4.0 or
2146 os_4.1, etc., not keeping separate files for each little release.
2148 package (package.U):
2149 This variable contains the name of the package being constructed.
2150 It is primarily intended for the use of later Configure units.
2153 This variable contains the name of the preferred pager on the system.
2154 Usual values are (the full pathnames of) more, less, pg, or cat.
2157 This variable contains a command that produces the text of the
2158 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2159 "ypcat passwd" when NIS is used.
2161 patchlevel (patchlevel.U):
2162 The patchlevel level of this package.
2163 The value of patchlevel comes from the patchlevel.h file.
2166 This is an old synonym for p_ in Head.U, the character
2167 used to separate elements in the command shell search PATH.
2170 This variable is used internally by Configure to determine the
2171 full pathname (if any) of the perl program. After Configure runs,
2172 the value is reset to a plain "perl" and is not useful.
2174 perladmin (perladmin.U):
2175 Electronic mail address of the perl5 administrator.
2177 perlpath (perlpath.U):
2178 This variable contains the eventual value of the PERLPATH symbol,
2179 which contains the name of the perl interpreter to be used in
2180 shell scripts and in the "eval 'exec'" idiom.
2183 This variable is used internally by Configure to determine the
2184 full pathname (if any) of the pg program. After Configure runs,
2185 the value is reset to a plain "pg" and is not useful.
2187 phostname (myhostname.U):
2188 This variable contains the eventual value of the PHOSTNAME symbol,
2189 which is a command that can be fed to popen() to get the host name.
2190 The program should probably not presume that the domain is or isn't
2193 pidtype (pidtype.U):
2194 This variable defines PIDTYPE to be something like pid_t, int,
2195 ushort, or whatever type is used to declare process ids in the kernel.
2198 Holds the private path used by Configure to find out the libraries.
2199 Its value is prepend to libpth. This variable takes care of special
2200 machines, like the mips. Usually, it should be empty.
2203 This variable is defined but not used by Configure.
2204 The value is a plain '' and is not useful.
2207 This variable is defined but not used by Configure.
2208 The value is a plain '' and is not useful.
2211 This variable holds the name of the directory below which the
2212 user will install the package. Usually, this is /usr/local, and
2213 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2214 man pages in /usr/local/man, etc. It is only used to set defaults
2215 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2217 prefixexp (prefix.U):
2218 This variable holds the full absolute path of the directory below
2219 which the user will install the package. Derived from prefix.
2221 privlib (privlib.U):
2222 This variable contains the eventual value of the PRIVLIB symbol,
2223 which is the name of the private library for this package. It may
2224 have a ~ on the front. It is up to the makefile to eventually create
2225 this directory while performing installation (with ~ substitution).
2227 privlibexp (privlib.U):
2228 This variable is the ~name expanded version of privlib, so that you
2229 may use it directly in Makefiles or shell scripts.
2231 prototype (prototype.U):
2232 This variable holds the eventual value of CAN_PROTOTYPE, which
2233 indicates the C compiler can handle funciton prototypes.
2235 ptrsize (ptrsize.U):
2236 This variable contains the value of the PTRSIZE symbol, which
2237 indicates to the C program how many bytes there are in a pointer.
2239 randbits (randbits.U):
2240 This variable contains the eventual value of the RANDBITS symbol,
2241 which indicates to the C program how many bits of random number
2242 the rand() function produces.
2244 ranlib (orderlib.U):
2245 This variable is set to the pathname of the ranlib program, if it is
2246 needed to generate random libraries. Set to ":" if ar can generate
2247 random libraries or if random libraries are not supported
2249 rd_nodata (nblock_io.U):
2250 This variable holds the return code from read() when no data is
2251 present. It should be -1, but some systems return 0 when O_NDELAY is
2252 used, which is a shame because you cannot make the difference between
2253 no data and an EOF.. Sigh!
2256 This variable is used internally by Configure to determine the
2257 full pathname (if any) of the rm program. After Configure runs,
2258 the value is reset to a plain "rm" and is not useful.
2261 This variable is defined but not used by Configure.
2262 The value is a plain '' and is not useful.
2265 This variable contains 'true' or 'false' depending whether the
2266 nm extraction should be performed or not, according to the value
2267 of usenm and the flags on the Configure command line.
2269 scriptdir (scriptdir.U):
2270 This variable holds the name of the directory in which the user wants
2271 to put publicly scripts for the package in question. It is either
2272 the same directory as for binaries, or a special one that can be
2273 mounted across different architectures, like /usr/share. Programs
2274 must be prepared to deal with ~name expansion.
2276 scriptdirexp (scriptdir.U):
2277 This variable is the same as scriptdir, but is filename expanded
2278 at configuration time, for programs not wanting to bother with it.
2281 This variable is used internally by Configure to determine the
2282 full pathname (if any) of the sed program. After Configure runs,
2283 the value is reset to a plain "sed" and is not useful.
2285 selectminbits (selectminbits.U):
2286 This variable holds the minimum number of bits operated by select.
2287 That is, if you do select(n, ...), how many bits at least will be
2288 cleared in the masks if some activity is detected. Usually this
2289 is either n or 32*ceil(n/32), especially many little-endians do
2290 the latter. This is only useful if you have select(), naturally.
2292 selecttype (selecttype.U):
2293 This variable holds the type used for the 2nd, 3rd, and 4th
2294 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2295 is defined, and 'int *' otherwise. This is only useful if you
2296 have select(), naturally.
2299 This variable is used internally by Configure to determine the
2300 full pathname (if any) of the sendmail program. After Configure runs,
2301 the value is reset to a plain "sendmail" and is not useful.
2304 This variable contains the full pathname of the shell used
2305 on this system to execute Bourne shell scripts. Usually, this will be
2306 /bin/sh, though it's possible that some systems will have /bin/ksh,
2307 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2309 This unit comes before Options.U, so you can't set sh with a '-D'
2310 option, though you can override this (and startsh)
2311 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2314 This variable is defined but not used by Configure.
2315 The value is a plain '' and is not useful.
2317 sharpbang (spitshell.U):
2318 This variable contains the string #! if this system supports that
2321 shmattype (d_shmat.U):
2322 This symbol contains the type of pointer returned by shmat().
2323 It can be 'void *' or 'char *'.
2325 shortsize (intsize.U):
2326 This variable contains the value of the SHORTSIZE symbol which
2327 indicates to the C program how many bytes there are in a short.
2329 shrpenv (libperl.U):
2330 If the user builds a shared libperl.so, then we need to tell the
2331 'perl' executable where it will be able to find the installed libperl.so.
2332 One way to do this on some systems is to set the environment variable
2333 LD_RUN_PATH to the directory that will be the final location of the
2334 shared libperl.so. The makefile can use this with something like
2335 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2337 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2340 See the main perl Makefile.SH for actual working usage.
2341 Alternatively, we might be able to use a command line option such
2342 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2343 $archlibexp/CORE (Linux).
2345 shsharp (spitshell.U):
2346 This variable tells further Configure units whether your sh can
2349 sig_name (sig_name.U):
2350 This variable holds the signal names, space separated. The leading
2351 SIG in signal name is removed. A ZERO is prepended to the
2352 list. This is currently not used.
2354 sig_name_init (sig_name.U):
2355 This variable holds the signal names, enclosed in double quotes and
2356 separated by commas, suitable for use in the SIG_NAME definition
2357 below. A "ZERO" is prepended to the list, and the list is
2358 terminated with a plain 0. The leading SIG in signal names
2359 is removed. See sig_num.
2361 sig_num (sig_name.U):
2362 This variable holds the signal numbers, comma separated. A 0 is
2363 prepended to the list (corresponding to the fake SIGZERO), and
2364 the list is terminated with a 0. Those numbers correspond to
2365 the value of the signal listed in the same place within the
2368 sig_num_init (sig_name.U):
2369 This variable holds the signal numbers, enclosed in double quotes and
2370 separated by commas, suitable for use in the SIG_NUM definition
2371 below. A "ZERO" is prepended to the list, and the list is
2372 terminated with a plain 0.
2374 signal_t (d_voidsig.U):
2375 This variable holds the type of the signal handler (void or int).
2377 sitearch (sitearch.U):
2378 This variable contains the eventual value of the SITEARCH symbol,
2379 which is the name of the private library for this package. It may
2380 have a ~ on the front. It is up to the makefile to eventually create
2381 this directory while performing installation (with ~ substitution).
2383 sitearchexp (sitearch.U):
2384 This variable is the ~name expanded version of sitearch, so that you
2385 may use it directly in Makefiles or shell scripts.
2387 sitelib (sitelib.U):
2388 This variable contains the eventual value of the SITELIB symbol,
2389 which is the name of the private library for this package. It may
2390 have a ~ on the front. It is up to the makefile to eventually create
2391 this directory while performing installation (with ~ substitution).
2393 sitelibexp (sitelib.U):
2394 This variable is the ~name expanded version of sitelib, so that you
2395 may use it directly in Makefiles or shell scripts.
2397 sizetype (sizetype.U):
2398 This variable defines sizetype to be something like size_t,
2399 unsigned long, or whatever type is used to declare length
2400 parameters for string functions.
2403 This variable is defined but not used by Configure.
2404 The value is a plain '' and is not useful.
2407 This variable is defined but not used by Configure.
2408 The value is a plain '' and is not useful.
2411 This variable contains a flag which will tell the C compiler and loader
2412 to produce a program running with a small memory model. It is up to
2413 the Makefile to use this.
2416 This variable holds the extension used to identify shared libraries
2417 (also known as shared objects) on the system. Usually set to 'so'.
2419 sockethdr (d_socket.U):
2420 This variable has any cpp '-I' flags needed for socket support.
2422 socketlib (d_socket.U):
2423 This variable has the names of any libraries needed for socket support.
2426 This variable is used internally by Configure to determine the
2427 full pathname (if any) of the sort program. After Configure runs,
2428 the value is reset to a plain "sort" and is not useful.
2430 spackage (package.U):
2431 This variable contains the name of the package being constructed,
2432 with the first letter uppercased, i.e. suitable for starting
2435 spitshell (spitshell.U):
2436 This variable contains the command necessary to spit out a runnable
2437 shell on this system. It is either cat or a grep '-v' for # comments.
2440 This variable contains a flag which will tell the C compiler and loader
2441 to produce a program that will run in separate I and D space, for those
2442 machines that support separation of instruction and data space. It is
2443 up to the Makefile to use this.
2446 This variable holds the path to the package source. It is up to
2447 the Makefile to use this variable and set VPATH accordingly to
2448 find the sources remotely.
2450 ssizetype (ssizetype.U):
2451 This variable defines ssizetype to be something like ssize_t,
2452 long or int. It is used by functions that return a count
2453 of bytes or an error condition. It must be a signed type.
2454 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2456 startperl (startperl.U):
2457 This variable contains the string to put on the front of a perl
2458 script to make sure (hopefully) that it runs with perl and not some
2459 shell. Of course, that leading line must be followed by the classical
2461 eval 'exec perl -S $0 ${1+"$@"}'
2462 if $running_under_some_shell;
2463 to guarantee perl startup should the shell execute the script. Note
2464 that this magic incatation is not understood by csh.
2466 startsh (startsh.U):
2467 This variable contains the string to put on the front of a shell
2468 script to make sure (hopefully) that it runs with sh and not some
2471 static_ext (Extensions.U):
2472 This variable holds a list of XS extension files we want to
2473 link statically into the package. It is used by Makefile.
2475 stdchar (stdchar.U):
2476 This variable conditionally defines STDCHAR to be the type of char
2477 used in stdio.h. It has the values "unsigned char" or "char".
2479 stdio_base (d_stdstdio.U):
2480 This variable defines how, given a FILE pointer, fp, to access the
2481 _base field (or equivalent) of stdio.h's FILE structure. This will
2482 be used to define the macro FILE_base(fp).
2484 stdio_bufsiz (d_stdstdio.U):
2485 This variable defines how, given a FILE pointer, fp, to determine
2486 the number of bytes store in the I/O buffer pointer to by the
2487 _base field (or equivalent) of stdio.h's FILE structure. This will
2488 be used to define the macro FILE_bufsiz(fp).
2490 stdio_cnt (d_stdstdio.U):
2491 This variable defines how, given a FILE pointer, fp, to access the
2492 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2493 be used to define the macro FILE_cnt(fp).
2495 stdio_filbuf (d_stdstdio.U):
2496 This variable defines how, given a FILE pointer, fp, to tell
2497 stdio to refill it's internal buffers (?). This will
2498 be used to define the macro FILE_filbuf(fp).
2500 stdio_ptr (d_stdstdio.U):
2501 This variable defines how, given a FILE pointer, fp, to access the
2502 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2503 be used to define the macro FILE_ptr(fp).
2505 strings (i_string.U):
2506 This variable holds the full path of the string header that will be
2507 used. Typically /usr/include/string.h or /usr/include/strings.h.
2510 This variable is defined but not used by Configure.
2511 The value is a plain '' and is not useful.
2513 subversion (patchlevel.U):
2514 The subversion level of this package.
2515 The value of subversion comes from the patchlevel.h file.
2516 This is unique to perl.
2519 This variable holds the place where the manual is located on this
2520 system. It is not the place where the user wants to put his manual
2521 pages. Rather it is the place where Configure may look to find manual
2522 for unix commands (section 1 of the manual usually). See mansrc.
2525 This variable is defined but not used by Configure.
2526 The value is a plain '' and is not useful.
2529 This variable is defined but not used by Configure.
2530 The value is a plain '' and is not useful.
2533 This variable is defined but not used by Configure.
2534 The value is a plain '' and is not useful.
2537 This variable is used internally by Configure to determine the
2538 full pathname (if any) of the tee program. After Configure runs,
2539 the value is reset to a plain "tee" and is not useful.
2542 This variable is used internally by Configure to determine the
2543 full pathname (if any) of the test program. After Configure runs,
2544 the value is reset to a plain "test" and is not useful.
2546 timeincl (i_time.U):
2547 This variable holds the full path of the included time header(s).
2549 timetype (d_time.U):
2550 This variable holds the type returned by time(). It can be long,
2551 or time_t on BSD sites (in which case <sys/types.h> should be
2552 included). Anyway, the type Time_t should be used.
2555 This variable is used internally by Configure to determine the
2556 full pathname (if any) of the touch program. After Configure runs,
2557 the value is reset to a plain "touch" and is not useful.
2560 This variable is used internally by Configure to determine the
2561 full pathname (if any) of the tr program. After Configure runs,
2562 the value is reset to a plain "tr" and is not useful.
2565 This variable contains the value to be passed to the tr(1)
2566 command to transliterate a newline. Typical values are
2567 '\012' and '\n'. This is needed for EBCDIC systems where
2568 newline is not necessarily '\012'.
2571 This variable is defined but not used by Configure.
2572 The value is a plain '' and is not useful.
2574 uidtype (uidtype.U):
2575 This variable defines Uid_t to be something like uid_t, int,
2576 ushort, or whatever type is used to declare user ids in the kernel.
2579 This variable is used internally by Configure to determine the
2580 full pathname (if any) of the uname program. After Configure runs,
2581 the value is reset to a plain "uname" and is not useful.
2584 This variable is used internally by Configure to determine the
2585 full pathname (if any) of the uniq program. After Configure runs,
2586 the value is reset to a plain "uniq" and is not useful.
2589 This variable indicates if the the system supports dynamic
2590 loading of some sort. See also dlsrc and dlobj.
2592 usemymalloc (mallocsrc.U):
2593 This variable contains y if the malloc that comes with this package
2594 is desired over the system's version of malloc. People often include
2595 special versions of malloc for effiency, but such versions are often
2596 less portable. See also mallocsrc and mallocobj.
2597 If this is 'y', then -lmalloc is removed from $libs.
2600 This variable contains 'true' or 'false' depending whether the
2601 nm extraction is wanted or not.
2603 useopcode (Extensions.U):
2604 This variable holds either 'true' or 'false' to indicate
2605 whether the Opcode extension should be used. The sole
2606 use for this currently is to allow an easy mechanism
2607 for users to skip the Opcode extension from the Configure
2610 useperlio (useperlio.U):
2611 This variable conditionally defines the USE_PERLIO symbol,
2612 and indicates that the PerlIO abstraction should be
2615 useposix (Extensions.U):
2616 This variable holds either 'true' or 'false' to indicate
2617 whether the POSIX extension should be used. The sole
2618 use for this currently is to allow an easy mechanism
2619 for hints files to indicate that POSIX will not compile
2620 on a particular system.
2623 This variable is set to true when the user agrees to use sfio.
2624 It is set to false when sfio is not available or when the user
2625 explicitely requests not to use sfio. It is here primarily so
2626 that command-line settings can override the auto-detection of
2627 d_sfio without running into a "WHOA THERE".
2629 useshrplib (libperl.U):
2630 This variable is set to 'yes' if the user wishes
2631 to build a shared libperl, and 'no' otherwise.
2633 usethreads (usethreads.U):
2634 This variable conditionally defines the USE_THREADS symbol,
2635 and indicates that Perl should be built to use threads.
2637 usevfork (d_vfork.U):
2638 This variable is set to true when the user accepts to use vfork.
2639 It is set to false when no vfork is available or when the user
2640 explicitely requests not to use vfork.
2643 This variable holds the path of the include files, which is
2644 usually /usr/include. It is mainly used by other Configure units.
2647 This variable is defined but not used by Configure.
2648 The value is a plain '' and is not useful.
2650 version (patchlevel.U):
2651 The full version number of this package. This combines
2652 baserev, patchlevel, and subversion to get the full
2653 version number, including any possible subversions. Care
2654 is taken to use the C locale in order to get something
2655 like 5.004 instead of 5,004. This is unique to perl.
2658 This variable is defined but not used by Configure.
2659 The value is a plain '' and is not useful.
2661 voidflags (voidflags.U):
2662 This variable contains the eventual value of the VOIDFLAGS symbol,
2663 which indicates how much support of the void type is given by this
2664 compiler. See VOIDFLAGS for more info.
2667 This variable is defined but not used by Configure.
2668 The value is a plain '' and is not useful.
2671 This variable is used internally by Configure to determine the
2672 full pathname (if any) of the zip program. After Configure runs,
2673 the value is reset to a plain "zip" and is not useful.