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 be 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 be 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 archname64 (use64bits.U):
71 This variable is used for the 64-bitness part of $archname.
73 archname (archname.U):
74 This variable is a short name to characterize the current
75 architecture. It is used mainly to construct the default archlib.
78 This variable defines any additional objects that must be linked
79 in with the program on this architecture. On unix, it is usually
80 empty. It is typically used to include emulations of unix calls
81 or other facilities. For perl on OS/2, for example, this would
85 This variable is be used internally by Configure to determine the
86 full pathname (if any) of the awk program. After Configure runs,
87 the value is reset to a plain "awk" and is not useful.
90 The base revision level of this package, from the .package file.
93 This variable is defined but not used by Configure.
94 The value is a plain '' and is not useful.
97 This variable holds the name of the directory in which the user wants
98 to put publicly executable images for the package in question. It
99 is most often a local directory such as /usr/local/bin. Programs using
100 this variable must be prepared to deal with ~name substitution.
103 This is the same as the bin variable, but is filename expanded at
104 configuration time, for use in your makefiles.
107 This variable is defined but not used by Configure.
108 The value is a plain '' and is not useful.
111 This variable is be used internally by Configure to determine the
112 full pathname (if any) of the byacc program. After Configure runs,
113 the value is reset to a plain "byacc" and is not useful.
115 byteorder (byteorder.U):
116 This variable holds the byte order. In the following, larger digits
117 indicate more significance. The variable byteorder is either 4321
118 on a big-endian machine, or 1234 on a little-endian, or 87654321
119 on a Cray ... or 3412 with weird order !
122 This variable contains the \c string if that is what causes the echo
123 command to suppress newline. Otherwise it is null. Correct usage is
124 $echo $n "prompt for a question: $c".
126 castflags (d_castneg.U):
127 This variable contains a flag that precise difficulties the
128 compiler has casting odd floating values to unsigned long:
130 1 = couldn't cast < 0
131 2 = couldn't cast >= 0x80000000
132 4 = couldn't cast in argument expression list
135 This variable is be used internally by Configure to determine the
136 full pathname (if any) of the cat program. After Configure runs,
137 the value is reset to a plain "cat" and is not useful.
140 This variable holds the name of a command to execute a C compiler which
141 can resolve multiple global references that happen to have the same
142 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
144 cccdlflags (dlsrc.U):
145 This variable contains any special flags that might need to be
146 passed with 'cc -c' to compile modules to be used to create a shared
147 library that will be used for dynamic loading. For hpux, this
148 should be +z. It is up to the makefile to use it.
151 This variable contains any special flags that might need to be
152 passed to cc to link with a shared library for dynamic loading.
153 It is up to the makefile to use it. For sunos 4.1, it should
157 This variable contains any additional C compiler flags desired by
158 the user. It is up to the Makefile to use this.
161 Login name of the person who ran the Configure script and answered the
162 questions. This is used to tag both config.sh and config_h.SH.
164 cf_email (cf_email.U):
165 Electronic mail address of the person who ran Configure. This can be
166 used by units that require the user's e-mail, like MailList.U.
169 Holds the output of the "date" command when the configuration file was
170 produced. This is used to tag both config.sh and config_h.SH.
173 This variable is defined but not used by Configure.
174 The value is a plain '' and is not useful.
177 This variable is defined but not used by Configure.
178 The value is a plain '' and is not useful.
181 This variable is defined but not used by Configure.
182 The value is a plain '' and is not useful.
184 clocktype (d_times.U):
185 This variable holds the type returned by times(). It can be long,
186 or clock_t on BSD sites (in which case <sys/types.h> should be
190 This variable is be used internally by Configure to determine the
191 full pathname (if any) of the comm program. After Configure runs,
192 the value is reset to a plain "comm" and is not useful.
195 This variable is defined but not used by Configure.
196 The value is a plain '' and is not useful.
198 contains (contains.U):
199 This variable holds the command to do a grep with a proper return
200 status. On most sane systems it is simply "grep". On insane systems
201 it is a grep followed by a cat followed by a test. This variable
202 is primarily for the use of other Configure units.
205 This variable is be used internally by Configure to determine the
206 full pathname (if any) of the cp program. After Configure runs,
207 the value is reset to a plain "cp" and is not useful.
210 This variable is defined but not used by Configure.
211 The value is a plain '' and is not useful.
214 This variable is be used internally by Configure to determine the
215 full pathname (if any) of the cpp program. After Configure runs,
216 the value is reset to a plain "cpp" and is not useful.
218 cpp_stuff (cpp_stuff.U):
219 This variable contains an identification of the catenation mechanism
220 used by the C preprocessor.
222 cppflags (ccflags.U):
223 This variable holds the flags that will be passed to the C pre-
224 processor. It is up to the Makefile to use it.
226 cpplast (cppstdin.U):
227 This variable has the same functionality as cppminus, only it applies
228 to cpprun and not cppstdin.
230 cppminus (cppstdin.U):
231 This variable contains the second part of the string which will invoke
232 the C preprocessor on the standard input and produce to standard
233 output. This variable will have the value "-" if cppstdin needs
234 a minus to specify standard input, otherwise the value is "".
237 This variable contains the command which will invoke a C preprocessor
238 on standard input and put the output to stdout. It is guaranteed not
239 to be a wrapper and may be a null string if no preprocessor can be
240 made directly available. This preprocessor might be different from the
241 one used by the C compiler. Don't forget to append cpplast after the
242 preprocessor options.
244 cppstdin (cppstdin.U):
245 This variable contains the command which will invoke the C
246 preprocessor on standard input and put the output to stdout.
247 It is primarily used by other Configure units that ask about
248 preprocessor symbols.
250 cryptlib (d_crypt.U):
251 This variable holds -lcrypt or the path to a libcrypt.a archive if
252 the crypt() function is not defined in the standard C library. It is
253 up to the Makefile to use this.
256 This variable is be used internally by Configure to determine the
257 full pathname (if any) of the csh program. After Configure runs,
258 the value is reset to a plain "csh" and is not useful.
260 d_Gconvert (d_gconvert.U):
261 This variable holds what Gconvert is defined as to convert
262 floating point numbers into strings. It could be 'gconvert'
263 or a more complex macro emulating gconvert with gcvt() or sprintf.
265 d_Gconvert='gconvert((x),(n),(t),(b))'
266 d_Gconvert='gcvt((x),(n),(b))'
267 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
269 d_access (d_access.U):
270 This variable conditionally defines HAS_ACCESS if the access() system
271 call is available to check for access permissions using real IDs.
273 d_accessx (d_accessx.U):
274 This variable conditionally defines the HAS_ACCESSX symbol, which
275 indicates to the C program that the accessx() routine is available.
278 This variable conditionally defines the HAS_ALARM symbol, which
279 indicates to the C program that the alarm() routine is available.
281 d_archlib (archlib.U):
282 This variable conditionally defines ARCHLIB to hold the pathname
283 of architecture-dependent library files for $package. If
284 $archlib is the same as $privlib, then this is set to undef.
286 d_attribut (d_attribut.U):
287 This variable conditionally defines HASATTRIBUTE, which
288 indicates the C compiler can check for function attributes,
289 such as printf formats.
292 This variable conditionally defines the HAS_BCMP symbol if
293 the bcmp() routine is available to compare strings.
296 This variable conditionally defines the HAS_BCOPY symbol if
297 the bcopy() routine is available to copy strings.
300 This symbol conditionally defines the symbol BSD when running on a
303 d_bsdgetpgrp (d_getpgrp.U):
304 This variable conditionally defines USE_BSD_GETPGRP if
305 getpgrp needs one arguments whereas USG one needs none.
307 d_bsdsetpgrp (d_setpgrp.U):
308 This variable conditionally defines USE_BSD_SETPGRP if
309 setpgrp needs two arguments whereas USG one needs none.
310 See also d_setpgid for a POSIX interface.
313 This variable conditionally defines the HAS_BZERO symbol if
314 the bzero() routine is available to set memory to 0.
316 d_casti32 (d_casti32.U):
317 This variable conditionally defines CASTI32, which indicates
318 whether the C compiler can cast large floats to 32-bit ints.
320 d_castneg (d_castneg.U):
321 This variable conditionally defines CASTNEG, which indicates
322 wether the C compiler can cast negative float to unsigned.
324 d_charvspr (d_vprintf.U):
325 This variable conditionally defines CHARVSPRINTF if this system
326 has vsprintf returning type (char*). The trend seems to be to
327 declare it as "int vsprintf()".
330 This variable conditionally defines the HAS_CHOWN symbol, which
331 indicates to the C program that the chown() routine is available.
333 d_chroot (d_chroot.U):
334 This variable conditionally defines the HAS_CHROOT symbol, which
335 indicates to the C program that the chroot() routine is available.
337 d_chsize (d_chsize.U):
338 This variable conditionally defines the CHSIZE symbol, which
339 indicates to the C program that the chsize() routine is available
340 to truncate files. You might need a -lx to get this routine.
342 d_closedir (d_closedir.U):
343 This variable conditionally defines HAS_CLOSEDIR if closedir() is
346 d_cmsghdr_s (d_socket.U):
347 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
348 which indicates that the the struct cmsghdr is supported.
351 This variable conditionally defines the HASCONST symbol, which
352 indicates to the C program that this C compiler knows about the
356 This variable conditionally defines the CRYPT symbol, which
357 indicates to the C program that the crypt() routine is available
358 to encrypt passwords and the like.
361 This variable conditionally defines the CSH symbol, which
362 indicates to the C program that the C-shell exists.
364 d_cuserid (d_cuserid.U):
365 This variable conditionally defines the HAS_CUSERID symbol, which
366 indicates to the C program that the cuserid() routine is available
367 to get character login names.
369 d_dbl_dig (d_dbl_dig.U):
370 This variable conditionally defines d_dbl_dig if this system's
371 header files provide DBL_DIG, which is the number of significant
372 digits in a double precision number.
374 d_dbmclose64 (dbm64.U):
375 This variable conditionally defines the HAS_DBMCLOSE64 symbol, which
376 indicates to the C program that the dbmclose64() routine is available.
378 d_dbminit64 (dbm64.U):
379 This variable conditionally defines the HAS_DBMINIT64 symbol, which
380 indicates to the C program that the dbminit64() routine is available.
382 d_delete64 (dbm64.U):
383 This variable conditionally defines the HAS_DELETE64 symbol, which
384 indicates to the C program that the delete64() routine is available.
386 d_difftime (d_difftime.U):
387 This variable conditionally defines the HAS_DIFFTIME symbol, which
388 indicates to the C program that the difftime() routine is available.
390 d_dirent64_s (io64.U):
391 This symbol will be defined if the C compiler supports struct dirent64.
393 d_dirnamlen (i_dirent.U):
394 This variable conditionally defines DIRNAMLEN, which indicates
395 to the C program that the length of directory entry names is
396 provided by a d_namelen field.
398 d_dlerror (d_dlerror.U):
399 This variable conditionally defines the HAS_DLERROR symbol, which
400 indicates to the C program that the dlerror() routine is available.
402 d_dlopen (d_dlopen.U):
403 This variable conditionally defines the HAS_DLOPEN symbol, which
404 indicates to the C program that the dlopen() routine is available.
406 d_dlsymun (d_dlsymun.U):
407 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
408 indicates that we need to prepend an underscore to the symbol
409 name before calling dlsym().
411 d_dosuid (d_dosuid.U):
412 This variable conditionally defines the symbol DOSUID, which
413 tells the C program that it should insert setuid emulation code
414 on hosts which have setuid #! scripts disabled.
416 d_drand48proto (d_drand48proto.U):
417 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
418 which indicates to the C program that the system provides
419 a prototype for the drand48() function. Otherwise, it is
420 up to the program to supply one.
423 This variable conditionally defines HAS_DUP2 if dup2() is
424 available to duplicate file descriptors.
426 d_eaccess (d_eaccess.U):
427 This variable conditionally defines the HAS_EACCESS symbol, which
428 indicates to the C program that the eaccess() routine is available.
430 d_endgrent (d_endgrent.U):
431 This variable conditionally defines the HAS_ENDGRENT symbol, which
432 indicates to the C program that the endgrent() routine is available
433 for sequential access of the group database.
435 d_endhent (d_endhent.U):
436 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
437 available to close whatever was being used for host queries.
439 d_endnent (d_endnent.U):
440 This variable conditionally defines HAS_ENDNETENT if endnetent() is
441 available to close whatever was being used for network queries.
443 d_endpent (d_endpent.U):
444 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
445 available to close whatever was being used for protocol queries.
447 d_endpwent (d_endpwent.U):
448 This variable conditionally defines the HAS_ENDPWENT symbol, which
449 indicates to the C program that the endpwent() routine is available
450 for sequential access of the passwd database.
452 d_endsent (d_endsent.U):
453 This variable conditionally defines HAS_ENDSERVENT if endservent() is
454 available to close whatever was being used for service queries.
456 d_eofnblk (nblock_io.U):
457 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
458 when reading from a non-blocking I/O source.
461 This variable conditionally defines the symbols EUNICE and VAX, which
462 alerts the C program that it must deal with ideosyncracies of VMS.
464 d_fchmod (d_fchmod.U):
465 This variable conditionally defines the HAS_FCHMOD symbol, which
466 indicates to the C program that the fchmod() routine is available
467 to change mode of opened files.
469 d_fchown (d_fchown.U):
470 This variable conditionally defines the HAS_FCHOWN symbol, which
471 indicates to the C program that the fchown() routine is available
472 to change ownership of opened files.
475 This variable conditionally defines the HAS_FCNTL symbol, and indicates
476 whether the fcntl() function exists
478 d_fd_macros (d_fd_set.U):
479 This variable contains the eventual value of the HAS_FD_MACROS symbol,
480 which indicates if your C compiler knows about the macros which
481 manipulate an fd_set.
483 d_fd_set (d_fd_set.U):
484 This variable contains the eventual value of the HAS_FD_SET symbol,
485 which indicates if your C compiler knows about the fd_set typedef.
487 d_fds_bits (d_fd_set.U):
488 This variable contains the eventual value of the HAS_FDS_BITS symbol,
489 which indicates if your fd_set typedef contains the fds_bits member.
490 If you have an fd_set typedef, but the dweebs who installed it did
491 a half-fast job and neglected to provide the macros to manipulate
492 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
495 This variable conditionally defines the HAS_FETCH64 symbol, which
496 indicates to the C program that the fetch64() routine is available.
498 d_fgetpos64 (stdio64.U):
499 This variable conditionally defines the HAS_FGETPOS64 symbol, which
500 indicates to the C program that the fgetpos64() routine is available.
502 d_fgetpos (d_fgetpos.U):
503 This variable conditionally defines HAS_FGETPOS if fgetpos() is
504 available to get the file position indicator.
506 d_firstkey64 (dbm64.U):
507 This variable conditionally defines the HAS_FIRSTKEY64 symbol, which
508 indicates to the C program that the firstkey64() routine is available.
510 d_flexfnam (d_flexfnam.U):
511 This variable conditionally defines the FLEXFILENAMES symbol, which
512 indicates that the system supports filenames longer than 14 characters.
514 d_flock64_s (io64.U):
515 This symbol will be defined if the C compiler supports struct flock64.
518 This variable conditionally defines HAS_FLOCK if flock() is
519 available to do file locking.
521 d_fopen64 (stdio64.U):
522 This variable conditionally defines the HAS_FOPEN64 symbol, which
523 indicates to the C program that the fopen64() routine is available.
526 This variable conditionally defines the HAS_FORK symbol, which
527 indicates to the C program that the fork() routine is available.
529 d_fpathconf (d_pathconf.U):
530 This variable conditionally defines the HAS_FPATHCONF symbol, which
531 indicates to the C program that the pathconf() routine is available
532 to determine file-system related limits and options associated
533 with a given open file descriptor.
535 d_freopen64 (stdio64.U):
536 This variable conditionally defines the HAS_FREOPEN64 symbol, which
537 indicates to the C program that the freopen64() routine is available.
539 d_fseek64 (stdio64.U):
540 This variable conditionally defines the HAS_FSEEK64 symbol, which
541 indicates to the C program that the fseek64() routine is available.
543 d_fseeko64 (stdio64.U):
544 This variable conditionally defines the HAS_FSEEKO64 symbol, which
545 indicates to the C program that the fseeko64() routine is available.
547 d_fseeko (d_fseeko.U):
548 This variable conditionally defines the HAS_FSEEKO symbol, which
549 indicates to the C program that the fseeko() routine is available.
551 d_fsetpos64 (stdio64.U):
552 This variable conditionally defines the HAS_FSETPOS64 symbol, which
553 indicates to the C program that the fsetpos64() routine is available.
555 d_fsetpos (d_fsetpos.U):
556 This variable conditionally defines HAS_FSETPOS if fsetpos() is
557 available to set the file position indicator.
560 This variable conditionally defines the HAS_FSTAT64 symbol, which
561 indicates to the C program that the fstat64() routine is available.
563 d_ftell64 (stdio64.U):
564 This variable conditionally defines the HAS_FTELL64 symbol, which
565 indicates to the C program that the ftell64() routine is available.
567 d_ftello64 (stdio64.U):
568 This variable conditionally defines the HAS_FTELLO64 symbol, which
569 indicates to the C program that the ftello64() routine is available.
571 d_ftello (d_ftello.U):
572 This variable conditionally defines the HAS_FTELLO symbol, which
573 indicates to the C program that the ftello() routine is available.
576 This variable conditionally defines the HAS_FTIME symbol, which indicates
577 that the ftime() routine exists. The ftime() routine is basically
578 a sub-second accuracy clock.
580 d_ftruncate64 (io64.U):
581 This variable conditionally defines the HAS_FTRUNCATE64 symbol, which
582 indicates to the C program that the ftruncate64() routine is available.
584 d_getgrent (d_getgrent.U):
585 This variable conditionally defines the HAS_GETGRENT symbol, which
586 indicates to the C program that the getgrent() routine is available
587 for sequential access of the group database.
589 d_getgrps (d_getgrps.U):
590 This variable conditionally defines the HAS_GETGROUPS symbol, which
591 indicates to the C program that the getgroups() routine is available
592 to get the list of process groups.
594 d_gethbyaddr (d_gethbyad.U):
595 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
596 indicates to the C program that the gethostbyaddr() routine is available
597 to look up hosts by their IP addresses.
599 d_gethbyname (d_gethbynm.U):
600 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
601 indicates to the C program that the gethostbyname() routine is available
602 to look up host names in some data base or other.
604 d_gethent (d_gethent.U):
605 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
606 available to look up host names in some data base or another.
608 d_gethname (d_gethname.U):
609 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
610 indicates to the C program that the gethostname() routine may be
611 used to derive the host name.
613 d_gethostprotos (d_gethostprotos.U):
614 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
615 which indicates to the C program that <netdb.h> supplies
616 prototypes for the various gethost*() functions.
617 See also netdbtype.U for probing for various netdb types.
619 d_getlogin (d_getlogin.U):
620 This variable conditionally defines the HAS_GETLOGIN symbol, which
621 indicates to the C program that the getlogin() routine is available
622 to get the login name.
624 d_getnbyaddr (d_getnbyad.U):
625 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
626 indicates to the C program that the getnetbyaddr() routine is available
627 to look up networks by their IP addresses.
629 d_getnbyname (d_getnbynm.U):
630 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
631 indicates to the C program that the getnetbyname() routine is available
632 to look up networks by their names.
634 d_getnent (d_getnent.U):
635 This variable conditionally defines HAS_GETNETENT if getnetent() is
636 available to look up network names in some data base or another.
638 d_getnetprotos (d_getnetprotos.U):
639 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
640 which indicates to the C program that <netdb.h> supplies
641 prototypes for the various getnet*() functions.
642 See also netdbtype.U for probing for various netdb types.
644 d_getpbyname (d_getprotby.U):
645 This variable conditionally defines the HAS_GETPROTOBYNAME
646 symbol, which indicates to the C program that the
647 getprotobyname() routine is available to look up protocols
650 d_getpbynumber (d_getprotby.U):
651 This variable conditionally defines the HAS_GETPROTOBYNUMBER
652 symbol, which indicates to the C program that the
653 getprotobynumber() routine is available to look up protocols
656 d_getpent (d_getpent.U):
657 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
658 available to look up protocols in some data base or another.
660 d_getpgid (d_getpgid.U):
661 This variable conditionally defines the HAS_GETPGID symbol, which
662 indicates to the C program that the getpgid(pid) function
663 is available to get the process group id.
665 d_getpgrp2 (d_getpgrp2.U):
666 This variable conditionally defines the HAS_GETPGRP2 symbol, which
667 indicates to the C program that the getpgrp2() (as in DG/UX) routine
668 is available to get the current process group.
670 d_getpgrp (d_getpgrp.U):
671 This variable conditionally defines HAS_GETPGRP if getpgrp() is
672 available to get the current process group.
674 d_getppid (d_getppid.U):
675 This variable conditionally defines the HAS_GETPPID symbol, which
676 indicates to the C program that the getppid() routine is available
677 to get the parent process ID.
679 d_getprior (d_getprior.U):
680 This variable conditionally defines HAS_GETPRIORITY if getpriority()
681 is available to get a process's priority.
683 d_getprotoprotos (d_getprotoprotos.U):
684 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
685 which indicates to the C program that <netdb.h> supplies
686 prototypes for the various getproto*() functions.
687 See also netdbtype.U for probing for various netdb types.
689 d_getpwent (d_getpwent.U):
690 This variable conditionally defines the HAS_GETPWENT symbol, which
691 indicates to the C program that the getpwent() routine is available
692 for sequential access of the passwd database.
694 d_getsbyname (d_getsrvby.U):
695 This variable conditionally defines the HAS_GETSERVBYNAME
696 symbol, which indicates to the C program that the
697 getservbyname() routine is available to look up services
700 d_getsbyport (d_getsrvby.U):
701 This variable conditionally defines the HAS_GETSERVBYPORT
702 symbol, which indicates to the C program that the
703 getservbyport() routine is available to look up services
706 d_getsent (d_getsent.U):
707 This variable conditionally defines HAS_GETSERVENT if getservent() is
708 available to look up network services in some data base or another.
710 d_getservprotos (d_getservprotos.U):
711 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
712 which indicates to the C program that <netdb.h> supplies
713 prototypes for the various getserv*() functions.
714 See also netdbtype.U for probing for various netdb types.
716 d_gettimeod (d_ftime.U):
717 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
718 indicates that the gettimeofday() system call exists (to obtain a
719 sub-second accuracy clock). You should probably include <sys/resource.h>.
721 d_gnulibc (d_gnulibc.U):
722 Defined if we're dealing with the GNU C Library.
724 d_grpasswd (i_grp.U):
725 This variable conditionally defines GRPASSWD, which indicates
726 that struct group in <grp.h> contains gr_passwd.
729 This variable conditionally defines HAS_HTONL if htonl() and its
730 friends are available to do network order byte swapping.
732 d_index (d_strchr.U):
733 This variable conditionally defines HAS_INDEX if index() and
734 rindex() are available for string searching.
736 d_inetaton (d_inetaton.U):
737 This variable conditionally defines the HAS_INET_ATON symbol, which
738 indicates to the C program that the inet_aton() function is available
739 to parse IP address "dotted-quad" strings.
742 This symbol will be defined if the C compiler supports ino64_t.
744 d_int64t (i_inttypes.U):
745 This symbol will be defined if the C compiler supports int64_t.
747 d_iovec_s (i_sysuio.U):
748 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
749 which indicates that the struct iovec is supported.
751 d_isascii (d_isascii.U):
752 This variable conditionally defines the HAS_ISASCII constant,
753 which indicates to the C program that isascii() is available.
755 d_killpg (d_killpg.U):
756 This variable conditionally defines the HAS_KILLPG symbol, which
757 indicates to the C program that the killpg() routine is available
758 to kill process groups.
760 d_lchown (d_lchown.U):
761 This variable conditionally defines the HAS_LCHOWN symbol, which
762 indicates to the C program that the lchown() routine is available
763 to operate on a symbolic link (instead of following the link).
766 This variable conditionally defines HAS_LINK if link() is
767 available to create hard links.
769 d_locconv (d_locconv.U):
770 This variable conditionally defines HAS_LOCALECONV if localeconv() is
771 available for numeric and monetary formatting conventions.
774 This variable conditionally defines the HAS_LOCKF64 symbol, which
775 indicates to the C program that the lockf64() routine is available.
778 This variable conditionally defines HAS_LOCKF if lockf() is
779 available to do file locking.
781 d_longdbl (d_longdbl.U):
782 This variable conditionally defines HAS_LONG_DOUBLE if
783 the long double type is supported.
785 d_longlong (d_longlong.U):
786 This variable conditionally defines HAS_LONG_LONG if
787 the long long type is supported.
790 This variable conditionally defines the HAS_LSEEK64 symbol, which
791 indicates to the C program that the lseek64() routine is available.
794 This variable conditionally defines the HAS_LSTAT64 symbol, which
795 indicates to the C program that the lstat64() routine is available.
798 This variable conditionally defines HAS_LSTAT if lstat() is
799 available to do file stats on symbolic links.
802 This variable conditionally defines the HAS_MBLEN symbol, which
803 indicates to the C program that the mblen() routine is available
804 to find the number of bytes in a multibye character.
806 d_mbstowcs (d_mbstowcs.U):
807 This variable conditionally defines the HAS_MBSTOWCS symbol, which
808 indicates to the C program that the mbstowcs() routine is available
809 to convert a multibyte string into a wide character string.
811 d_mbtowc (d_mbtowc.U):
812 This variable conditionally defines the HAS_MBTOWC symbol, which
813 indicates to the C program that the mbtowc() routine is available
814 to convert multibyte to a wide character.
816 d_memcmp (d_memcmp.U):
817 This variable conditionally defines the HAS_MEMCMP symbol, which
818 indicates to the C program that the memcmp() routine is available
819 to compare blocks of memory.
821 d_memcpy (d_memcpy.U):
822 This variable conditionally defines the HAS_MEMCPY symbol, which
823 indicates to the C program that the memcpy() routine is available
824 to copy blocks of memory.
826 d_memmove (d_memmove.U):
827 This variable conditionally defines the HAS_MEMMOVE symbol, which
828 indicates to the C program that the memmove() routine is available
829 to copy potentatially overlapping blocks of memory.
831 d_memset (d_memset.U):
832 This variable conditionally defines the HAS_MEMSET symbol, which
833 indicates to the C program that the memset() routine is available
834 to set blocks of memory.
837 This variable conditionally defines the HAS_MKDIR symbol, which
838 indicates to the C program that the mkdir() routine is available
839 to create directories..
841 d_mkfifo (d_mkfifo.U):
842 This variable conditionally defines the HAS_MKFIFO symbol, which
843 indicates to the C program that the mkfifo() routine is available.
845 d_mktime (d_mktime.U):
846 This variable conditionally defines the HAS_MKTIME symbol, which
847 indicates to the C program that the mktime() routine is available.
850 This variable conditionally defines the HAS_MSG symbol, which
851 indicates that the entire msg*(2) library is present.
853 d_msg_ctrunc (d_socket.U):
854 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
855 which indicates that the MSG_CTRUNC is available. #ifdef is
856 not enough because it may be an enum, glibc has been known to do this.
858 d_msg_dontroute (d_socket.U):
859 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
860 which indicates that the MSG_DONTROUTE is available. #ifdef is
861 not enough because it may be an enum, glibc has been known to do this.
863 d_msg_oob (d_socket.U):
864 This variable conditionally defines the HAS_MSG_OOB symbol,
865 which indicates that the MSG_OOB is available. #ifdef is
866 not enough because it may be an enum, glibc has been known to do this.
868 d_msg_peek (d_socket.U):
869 This variable conditionally defines the HAS_MSG_PEEK symbol,
870 which indicates that the MSG_PEEK is available. #ifdef is
871 not enough because it may be an enum, glibc has been known to do this.
873 d_msg_proxy (d_socket.U):
874 This variable conditionally defines the HAS_MSG_PROXY symbol,
875 which indicates that the MSG_PROXY is available. #ifdef is
876 not enough because it may be an enum, glibc has been known to do this.
878 d_msgctl (d_msgctl.U):
879 This variable conditionally defines the HAS_MSGCTL symbol, which
880 indicates to the C program that the msgctl() routine is available.
882 d_msgget (d_msgget.U):
883 This variable conditionally defines the HAS_MSGGET symbol, which
884 indicates to the C program that the msgget() routine is available.
886 d_msghdr_s (d_socket.U):
887 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
888 which indicates that the struct msghdr is supported.
890 d_msgrcv (d_msgrcv.U):
891 This variable conditionally defines the HAS_MSGRCV symbol, which
892 indicates to the C program that the msgrcv() routine is available.
894 d_msgsnd (d_msgsnd.U):
895 This variable conditionally defines the HAS_MSGSND symbol, which
896 indicates to the C program that the msgsnd() routine is available.
898 d_mymalloc (mallocsrc.U):
899 This variable conditionally defines MYMALLOC in case other parts
900 of the source want to take special action if MYMALLOC is used.
901 This may include different sorts of profiling or error detection.
903 d_nextkey64 (dbm64.U):
904 This variable conditionally defines the HAS_NEXTKEY64 symbol, which
905 indicates to the C program that the nextkey64() routine is available.
908 This variable conditionally defines the HAS_NICE symbol, which
909 indicates to the C program that the nice() routine is available.
912 This symbol will be defined if the C compiler supports off64_t.
914 d_oldpthreads (usethreads.U):
915 This variable conditionally defines the OLD_PTHREADS_API symbol,
916 and indicates that Perl should be built to use the old
917 draft POSIX threads API. This is only potneially meaningful if
920 d_oldsock (d_socket.U):
921 This variable conditionally defines the OLDSOCKET symbol, which
922 indicates that the BSD socket interface is based on 4.1c and not 4.2.
925 This variable conditionally defines the HAS_OPEN3 manifest constant,
926 which indicates to the C program that the 3 argument version of
927 the open(2) function is available.
930 This variable conditionally defines the HAS_OPEN64 symbol, which
931 indicates to the C program that the open64() routine is available.
933 d_opendir64 (io64.U):
934 This variable conditionally defines the HAS_OPENDIR64 symbol, which
935 indicates to the C program that the opendir64() routine is available.
937 d_pathconf (d_pathconf.U):
938 This variable conditionally defines the HAS_PATHCONF symbol, which
939 indicates to the C program that the pathconf() routine is available
940 to determine file-system related limits and options associated
941 with a given filename.
944 This variable conditionally defines the HAS_PAUSE symbol, which
945 indicates to the C program that the pause() routine is available
946 to suspend a process until a signal is received.
948 d_phostname (d_gethname.U):
949 This variable conditionally defines the PHOSTNAME symbol, which
950 contains the shell command which, when fed to popen(), may be
951 used to derive the host name.
954 This variable conditionally defines the HAS_PIPE symbol, which
955 indicates to the C program that the pipe() routine is available
956 to create an inter-process channel.
959 This variable conditionally defines the HAS_POLL symbol, which
960 indicates to the C program that the poll() routine is available
961 to poll active file descriptors.
963 d_portable (d_portable.U):
964 This variable conditionally defines the PORTABLE symbol, which
965 indicates to the C program that it should not assume that it is
966 running on the machine it was compiled on.
968 d_pthread_create_joinable (d_pthrattrj.U):
969 This variable conditionally defines pthread_create_joinable.
970 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
972 d_pthread_yield (d_pthread_y.U):
973 This variable conditionally defines the HAS_PTHREAD_YIELD
974 symbol if the pthread_yield routine is available to yield
975 the execution of the current thread.
978 This variable conditionally defines PWAGE, which indicates
979 that struct passwd contains pw_age.
981 d_pwchange (i_pwd.U):
982 This variable conditionally defines PWCHANGE, which indicates
983 that struct passwd contains pw_change.
986 This variable conditionally defines PWCLASS, which indicates
987 that struct passwd contains pw_class.
989 d_pwcomment (i_pwd.U):
990 This variable conditionally defines PWCOMMENT, which indicates
991 that struct passwd contains pw_comment.
993 d_pwexpire (i_pwd.U):
994 This variable conditionally defines PWEXPIRE, which indicates
995 that struct passwd contains pw_expire.
998 This variable conditionally defines PWGECOS, which indicates
999 that struct passwd contains pw_gecos.
1001 d_pwpasswd (i_pwd.U):
1002 This variable conditionally defines PWPASSWD, which indicates
1003 that struct passwd contains pw_passwd.
1005 d_pwquota (i_pwd.U):
1006 This variable conditionally defines PWQUOTA, which indicates
1007 that struct passwd contains pw_quota.
1009 d_readdir64 (io64.U):
1010 This variable conditionally defines the HAS_READDIR64 symbol, which
1011 indicates to the C program that the readdir64() routine is available.
1013 d_readdir (d_readdir.U):
1014 This variable conditionally defines HAS_READDIR if readdir() is
1015 available to read directory entries.
1017 d_readlink (d_readlink.U):
1018 This variable conditionally defines the HAS_READLINK symbol, which
1019 indicates to the C program that the readlink() routine is available
1020 to read the value of a symbolic link.
1022 d_readv (d_readv.U):
1023 This variable conditionally defines the HAS_READV symbol, which
1024 indicates to the C program that the readv() routine is available.
1026 d_recvmsg (d_socket.U):
1027 This variable conditionally defines the HAS_RECVMSG symbol,
1028 which indicates that the recvmsg is supported.
1030 d_rename (d_rename.U):
1031 This variable conditionally defines the HAS_RENAME symbol, which
1032 indicates to the C program that the rename() routine is available
1035 d_rewinddir (d_readdir.U):
1036 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1039 d_rmdir (d_rmdir.U):
1040 This variable conditionally defines HAS_RMDIR if rmdir() is
1041 available to remove directories.
1043 d_safebcpy (d_safebcpy.U):
1044 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1045 the bcopy() routine can do overlapping copies.
1047 d_safemcpy (d_safemcpy.U):
1048 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1049 the memcpy() routine can do overlapping copies.
1051 d_sanemcmp (d_sanemcmp.U):
1052 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1053 the memcpy() routine is available and can be used to compare relative
1054 magnitudes of chars with their high bits set.
1056 d_sched_yield (d_pthread_y.U):
1057 This variable conditionally defines the HAS_SCHED_YIELD
1058 symbol if the sched_yield routine is available to yield
1059 the execution of the current thread.
1061 d_scm_rights (d_socket.U):
1062 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1063 which indicates that the SCM_RIGHTS is available. #ifdef is
1064 not enough because it may be an enum, glibc has been known to do this.
1066 d_seekdir64 (io64.U):
1067 This variable conditionally defines the HAS_SEEKDIR64 symbol, which
1068 indicates to the C program that the seekdir64() routine is available.
1070 d_seekdir (d_readdir.U):
1071 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1074 d_select (d_select.U):
1075 This variable conditionally defines HAS_SELECT if select() is
1076 available to select active file descriptors. A <sys/time.h>
1077 inclusion may be necessary for the timeout field.
1080 This variable conditionally defines the HAS_SEM symbol, which
1081 indicates that the entire sem*(2) library is present.
1083 d_semctl (d_semctl.U):
1084 This variable conditionally defines the HAS_SEMCTL symbol, which
1085 indicates to the C program that the semctl() routine is available.
1087 d_semctl_semid_ds (d_union_senum.U):
1088 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1089 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1091 d_semctl_semun (d_union_senum.U):
1092 This variable conditionally defines USE_SEMCTL_SEMUN, which
1093 indicates that union semun is to be used for semctl IPC_STAT.
1095 d_semget (d_semget.U):
1096 This variable conditionally defines the HAS_SEMGET symbol, which
1097 indicates to the C program that the semget() routine is available.
1099 d_semop (d_semop.U):
1100 This variable conditionally defines the HAS_SEMOP symbol, which
1101 indicates to the C program that the semop() routine is available.
1103 d_sendmsg (d_socket.U):
1104 This variable conditionally defines the HAS_SENDMSG symbol,
1105 which indicates that the sendmsg is supported.
1107 d_setegid (d_setegid.U):
1108 This variable conditionally defines the HAS_SETEGID symbol, which
1109 indicates to the C program that the setegid() routine is available
1110 to change the effective gid of the current program.
1112 d_seteuid (d_seteuid.U):
1113 This variable conditionally defines the HAS_SETEUID symbol, which
1114 indicates to the C program that the seteuid() routine is available
1115 to change the effective uid of the current program.
1117 d_setgrent (d_setgrent.U):
1118 This variable conditionally defines the HAS_SETGRENT symbol, which
1119 indicates to the C program that the setgrent() routine is available
1120 for initializing sequential access to the group database.
1122 d_setgrps (d_setgrps.U):
1123 This variable conditionally defines the HAS_SETGROUPS symbol, which
1124 indicates to the C program that the setgroups() routine is available
1125 to set the list of process groups.
1127 d_sethent (d_sethent.U):
1128 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1131 d_setlinebuf (d_setlnbuf.U):
1132 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1133 indicates to the C program that the setlinebuf() routine is available
1134 to change stderr or stdout from block-buffered or unbuffered to a
1137 d_setlocale (d_setlocale.U):
1138 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1139 available to handle locale-specific ctype implementations.
1141 d_setnent (d_setnent.U):
1142 This variable conditionally defines HAS_SETNETENT if setnetent() is
1145 d_setpent (d_setpent.U):
1146 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1149 d_setpgid (d_setpgid.U):
1150 This variable conditionally defines the HAS_SETPGID symbol if the
1151 setpgid(pid, gpid) function is available to set process group ID.
1153 d_setpgrp2 (d_setpgrp2.U):
1154 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1155 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1156 is available to set the current process group.
1158 d_setpgrp (d_setpgrp.U):
1159 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1160 available to set the current process group.
1162 d_setprior (d_setprior.U):
1163 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1164 is available to set a process's priority.
1166 d_setpwent (d_setpwent.U):
1167 This variable conditionally defines the HAS_SETPWENT symbol, which
1168 indicates to the C program that the setpwent() routine is available
1169 for initializing sequential access to the passwd database.
1171 d_setregid (d_setregid.U):
1172 This variable conditionally defines HAS_SETREGID if setregid() is
1173 available to change the real and effective gid of the current
1176 d_setresgid (d_setregid.U):
1177 This variable conditionally defines HAS_SETRESGID if setresgid() is
1178 available to change the real, effective and saved gid of the current
1181 d_setresuid (d_setreuid.U):
1182 This variable conditionally defines HAS_SETREUID if setresuid() is
1183 available to change the real, effective and saved uid of the current
1186 d_setreuid (d_setreuid.U):
1187 This variable conditionally defines HAS_SETREUID if setreuid() is
1188 available to change the real and effective uid of the current
1191 d_setrgid (d_setrgid.U):
1192 This variable conditionally defines the HAS_SETRGID symbol, which
1193 indicates to the C program that the setrgid() routine is available
1194 to change the real gid of the current program.
1196 d_setruid (d_setruid.U):
1197 This variable conditionally defines the HAS_SETRUID symbol, which
1198 indicates to the C program that the setruid() routine is available
1199 to change the real uid of the current program.
1201 d_setsent (d_setsent.U):
1202 This variable conditionally defines HAS_SETSERVENT if setservent() is
1205 d_setsid (d_setsid.U):
1206 This variable conditionally defines HAS_SETSID if setsid() is
1207 available to set the process group ID.
1209 d_setvbuf (d_setvbuf.U):
1210 This variable conditionally defines the HAS_SETVBUF symbol, which
1211 indicates to the C program that the setvbuf() routine is available
1212 to change buffering on an open stdio stream.
1215 This variable conditionally defines the USE_SFIO symbol,
1216 and indicates whether sfio is available (and should be used).
1219 This variable conditionally defines the HAS_SHM symbol, which
1220 indicates that the entire shm*(2) library is present.
1222 d_shmat (d_shmat.U):
1223 This variable conditionally defines the HAS_SHMAT symbol, which
1224 indicates to the C program that the shmat() routine is available.
1226 d_shmatprototype (d_shmat.U):
1227 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1228 symbol, which indicates that sys/shm.h has a prototype for
1231 d_shmctl (d_shmctl.U):
1232 This variable conditionally defines the HAS_SHMCTL symbol, which
1233 indicates to the C program that the shmctl() routine is available.
1235 d_shmdt (d_shmdt.U):
1236 This variable conditionally defines the HAS_SHMDT symbol, which
1237 indicates to the C program that the shmdt() routine is available.
1239 d_shmget (d_shmget.U):
1240 This variable conditionally defines the HAS_SHMGET symbol, which
1241 indicates to the C program that the shmget() routine is available.
1243 d_sigaction (d_sigaction.U):
1244 This variable conditionally defines the HAS_SIGACTION symbol, which
1245 indicates that the Vr4 sigaction() routine is available.
1247 d_sigsetjmp (d_sigsetjmp.U):
1248 This variable conditionally defines the HAS_SIGSETJMP symbol,
1249 which indicates that the sigsetjmp() routine is available to
1250 call setjmp() and optionally save the process's signal mask.
1252 d_socket (d_socket.U):
1253 This variable conditionally defines HAS_SOCKET, which indicates
1254 that the BSD socket interface is supported.
1256 d_sockpair (d_socket.U):
1257 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1258 indicates that the BSD socketpair() is supported.
1261 This variable conditionally defines the HAS_STAT64 symbol, which
1262 indicates to the C program that the stat64() routine is available.
1264 d_statblks (d_statblks.U):
1265 This variable conditionally defines USE_STAT_BLOCKS
1266 if this system has a stat structure declaring
1267 st_blksize and st_blocks.
1269 d_stdio_cnt_lval (d_stdstdio.U):
1270 This variable conditionally defines STDIO_CNT_LVALUE if the
1271 FILE_cnt macro can be used as an lvalue.
1273 d_stdio_ptr_lval (d_stdstdio.U):
1274 This variable conditionally defines STDIO_PTR_LVALUE if the
1275 FILE_ptr macro can be used as an lvalue.
1277 d_stdiobase (d_stdstdio.U):
1278 This variable conditionally defines USE_STDIO_BASE if this system
1279 has a FILE structure declaring a usable _base field (or equivalent)
1282 d_stdstdio (d_stdstdio.U):
1283 This variable conditionally defines USE_STDIO_PTR if this system
1284 has a FILE structure declaring usable _ptr and _cnt fields (or
1285 equivalent) in stdio.h.
1287 d_store64 (dbm64.U):
1288 This variable conditionally defines the HAS_STORE64 symbol, which
1289 indicates to the C program that the store64() routine is available.
1291 d_strchr (d_strchr.U):
1292 This variable conditionally defines HAS_STRCHR if strchr() and
1293 strrchr() are available for string searching.
1295 d_strcoll (d_strcoll.U):
1296 This variable conditionally defines HAS_STRCOLL if strcoll() is
1297 available to compare strings using collating information.
1299 d_strctcpy (d_strctcpy.U):
1300 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1301 indicates to the C program that this C compiler knows how to copy
1304 d_strerrm (d_strerror.U):
1305 This variable holds what Strerrr is defined as to translate an error
1306 code condition into an error message string. It could be 'strerror'
1307 or a more complex macro emulating strrror with sys_errlist[], or the
1308 "unknown" string when both strerror and sys_errlist are missing.
1310 d_strerror (d_strerror.U):
1311 This variable conditionally defines HAS_STRERROR if strerror() is
1312 available to translate error numbers to strings.
1314 d_strtod (d_strtod.U):
1315 This variable conditionally defines the HAS_STRTOD symbol, which
1316 indicates to the C program that the strtod() routine is available
1317 to provide better numeric string conversion than atof().
1319 d_strtol (d_strtol.U):
1320 This variable conditionally defines the HAS_STRTOL symbol, which
1321 indicates to the C program that the strtol() routine is available
1322 to provide better numeric string conversion than atoi() and friends.
1324 d_strtoul (d_strtoul.U):
1325 This variable conditionally defines the HAS_STRTOUL symbol, which
1326 indicates to the C program that the strtoul() routine is available
1327 to provide conversion of strings to unsigned long.
1329 d_strxfrm (d_strxfrm.U):
1330 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1331 available to transform strings.
1333 d_suidsafe (d_dosuid.U):
1334 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1335 if setuid scripts can be secure. This test looks in /dev/fd/.
1337 d_symlink (d_symlink.U):
1338 This variable conditionally defines the HAS_SYMLINK symbol, which
1339 indicates to the C program that the symlink() routine is available
1340 to create symbolic links.
1342 d_syscall (d_syscall.U):
1343 This variable conditionally defines HAS_SYSCALL if syscall() is
1344 available call arbitrary system calls.
1346 d_sysconf (d_sysconf.U):
1347 This variable conditionally defines the HAS_SYSCONF symbol, which
1348 indicates to the C program that the sysconf() routine is available
1349 to determine system related limits and options.
1351 d_sysernlst (d_strerror.U):
1352 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1353 is available to translate error numbers to the symbolic name.
1355 d_syserrlst (d_strerror.U):
1356 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1357 available to translate error numbers to strings.
1359 d_system (d_system.U):
1360 This variable conditionally defines HAS_SYSTEM if system() is
1361 available to issue a shell command.
1363 d_tcgetpgrp (d_tcgtpgrp.U):
1364 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1365 indicates to the C program that the tcgetpgrp() routine is available.
1366 to get foreground process group ID.
1368 d_tcsetpgrp (d_tcstpgrp.U):
1369 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1370 indicates to the C program that the tcsetpgrp() routine is available
1371 to set foreground process group ID.
1373 d_telldir64 (io64.U):
1374 This variable conditionally defines the HAS_TELLDIR64 symbol, which
1375 indicates to the C program that the telldir64() routine is available.
1377 d_telldir (d_readdir.U):
1378 This variable conditionally defines HAS_TELLDIR if telldir() is
1382 This variable conditionally defines the HAS_TIME symbol, which indicates
1383 that the time() routine exists. The time() routine is normaly
1384 provided on UNIX systems.
1386 d_times (d_times.U):
1387 This variable conditionally defines the HAS_TIMES symbol, which indicates
1388 that the times() routine exists. The times() routine is normaly
1389 provided on UNIX systems. You may have to include <sys/times.h>.
1391 d_tmpfile64 (stdio64.U):
1392 This variable conditionally defines the HAS_TMPFILE64 symbol, which
1393 indicates to the C program that the tmpfile64() routine is available.
1395 d_truncate64 (io64.U):
1396 This variable conditionally defines the HAS_TRUNCATE64 symbol, which
1397 indicates to the C program that the truncate64() routine is available.
1399 d_truncate (d_truncate.U):
1400 This variable conditionally defines HAS_TRUNCATE if truncate() is
1401 available to truncate files.
1403 d_tzname (d_tzname.U):
1404 This variable conditionally defines HAS_TZNAME if tzname[] is
1405 available to access timezone names.
1407 d_umask (d_umask.U):
1408 This variable conditionally defines the HAS_UMASK symbol, which
1409 indicates to the C program that the umask() routine is available.
1410 to set and get the value of the file creation mask.
1412 d_uname (d_gethname.U):
1413 This variable conditionally defines the HAS_UNAME symbol, which
1414 indicates to the C program that the uname() routine may be
1415 used to derive the host name.
1417 d_union_semun (d_union_senum.U):
1418 This variable conditionally defines HAS_UNION_SEMUN if the
1419 union semun is defined by including <sys/sem.h>.
1421 d_vfork (d_vfork.U):
1422 This variable conditionally defines the HAS_VFORK symbol, which
1423 indicates the vfork() routine is available.
1425 d_void_closedir (d_closedir.U):
1426 This variable conditionally defines VOID_CLOSEDIR if closedir()
1427 does not return a value.
1429 d_voidsig (d_voidsig.U):
1430 This variable conditionally defines VOIDSIG if this system
1431 declares "void (*signal(...))()" in signal.h. The old way was to
1432 declare it as "int (*signal(...))()".
1434 d_voidtty (i_sysioctl.U):
1435 This variable conditionally defines USE_IOCNOTTY to indicate that the
1436 ioctl() call with TIOCNOTTY should be used to void tty association.
1437 Otherwise (on USG probably), it is enough to close the standard file
1438 decriptors and do a setpgrp().
1440 d_volatile (d_volatile.U):
1441 This variable conditionally defines the HASVOLATILE symbol, which
1442 indicates to the C program that this C compiler knows about the
1443 volatile declaration.
1445 d_vprintf (d_vprintf.U):
1446 This variable conditionally defines the HAS_VPRINTF symbol, which
1447 indicates to the C program that the vprintf() routine is available
1448 to printf with a pointer to an argument list.
1450 d_wait4 (d_wait4.U):
1451 This variable conditionally defines the HAS_WAIT4 symbol, which
1452 indicates the wait4() routine is available.
1454 d_waitpid (d_waitpid.U):
1455 This variable conditionally defines HAS_WAITPID if waitpid() is
1456 available to wait for child process.
1458 d_wcstombs (d_wcstombs.U):
1459 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1460 indicates to the C program that the wcstombs() routine is available
1461 to convert wide character strings to multibyte strings.
1463 d_wctomb (d_wctomb.U):
1464 This variable conditionally defines the HAS_WCTOMB symbol, which
1465 indicates to the C program that the wctomb() routine is available
1466 to convert a wide character to a multibyte.
1468 d_writev (d_writev.U):
1469 This variable conditionally defines the HAS_WRITEV symbol, which
1470 indicates to the C program that the writev() routine is available.
1473 This variable conditionally defines the symbol XENIX, which alerts
1474 the C program that it runs under Xenix.
1477 This variable is be used internally by Configure to determine the
1478 full pathname (if any) of the date program. After Configure runs,
1479 the value is reset to a plain "date" and is not useful.
1481 db_hashtype (i_db.U):
1482 This variable contains the type of the hash structure element
1483 in the <db.h> header file. In older versions of DB, it was
1484 int, while in newer ones it is u_int32_t.
1486 db_prefixtype (i_db.U):
1487 This variable contains the type of the prefix structure element
1488 in the <db.h> header file. In older versions of DB, it was
1489 int, while in newer ones it is size_t.
1491 direntrytype (i_dirent.U):
1492 This symbol is set to 'struct direct' or 'struct dirent' depending on
1493 whether dirent is available or not. You should use this pseudo type to
1494 portably declare your directory entries.
1497 This variable contains the extension that is to be used for the
1498 dynamically loaded modules that perl generaties.
1501 This variable contains the name of the dynamic loading file that
1502 will be used with the package.
1504 doublesize (doublesize.U):
1505 This variable contains the value of the DOUBLESIZE symbol, which
1506 indicates to the C program how many bytes there are in a double.
1508 drand01 (randfunc.U):
1509 Indicates the macro to be used to generate normalized
1510 random numbers. Uses randfunc, often divided by
1511 (double) (((unsigned long) 1 << randbits)) in order to
1512 normalize the result.
1513 In C programs, the macro 'Drand01' is mapped to drand01.
1515 dynamic_ext (Extensions.U):
1516 This variable holds a list of XS extension files we want to
1517 link dynamically into the package. It is used by Makefile.
1519 eagain (nblock_io.U):
1520 This variable bears the symbolic errno code set by read() when no
1521 data is present on the file and non-blocking I/O was enabled (otherwise,
1522 read() blocks naturally).
1525 This variable conditionally defines EBCDIC if this
1526 system uses EBCDIC encoding. Among other things, this
1527 means that the character ranges are not contiguous.
1531 This variable is be used internally by Configure to determine the
1532 full pathname (if any) of the echo program. After Configure runs,
1533 the value is reset to a plain "echo" and is not useful.
1536 This variable is be used internally by Configure to determine the
1537 full pathname (if any) of the egrep program. After Configure runs,
1538 the value is reset to a plain "egrep" and is not useful.
1541 This variable is defined but not used by Configure.
1542 The value is a plain '' and is not useful.
1545 When running under Eunice this variable contains a command which will
1546 convert a shell script to the proper form of text file for it to be
1547 executable by the shell. On other systems it is a no-op.
1550 This is an old synonym for _exe.
1553 This variable is be used internally by Configure to determine the
1554 full pathname (if any) of the expr program. After Configure runs,
1555 the value is reset to a plain "expr" and is not useful.
1557 extensions (Extensions.U):
1558 This variable holds a list of all extension files (both XS and
1559 non-xs linked into the package. It is propagated to Config.pm
1560 and is typically used to test whether a particular extesion
1564 This variable is defined but not used by Configure.
1565 The value is a plain '' and is not useful.
1567 firstmakefile (Unix.U):
1568 This variable defines the first file searched by make. On unix,
1569 it is makefile (then Makefile). On case-insensitive systems,
1570 it might be something else. This is only used to deal with
1571 convoluted make depend tricks.
1574 This variable is defined but not used by Configure.
1575 The value is a plain '' and is not useful.
1577 fpostype (fpostype.U):
1578 This variable defines Fpos_t to be something like fpost_t, long,
1579 uint, or whatever type is used to declare file positions in libc.
1581 freetype (mallocsrc.U):
1582 This variable contains the return type of free(). It is usually
1583 void, but occasionally int.
1586 This variable contains the full pathname to 'csh', whether or
1587 not the user has specified 'portability'. This is only used
1588 in the compiled C program, and we assume that all systems which
1589 can share this executable will have the same full pathname to
1592 full_sed (Loc_sed.U):
1593 This variable contains the full pathname to 'sed', whether or
1594 not the user has specified 'portability'. This is only used
1595 in the compiled C program, and we assume that all systems which
1596 can share this executable will have the same full pathname to
1600 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1601 indicate whether the compiler is version 1 or 2. This is used in
1602 setting some of the default cflags. It is set to '' if not gcc.
1604 gidtype (gidtype.U):
1605 This variable defines Gid_t to be something like gid_t, int,
1606 ushort, or whatever type is used to declare the return type
1607 of getgid(). Typically, it is the type of group ids in the kernel.
1610 This variable is be used internally by Configure to determine the
1611 full pathname (if any) of the grep program. After Configure runs,
1612 the value is reset to a plain "grep" and is not useful.
1615 This variable contains a command that produces the text of the
1616 /etc/group file. This is normally "cat /etc/group", but can be
1617 "ypcat group" when NIS is used.
1619 groupstype (groupstype.U):
1620 This variable defines Groups_t to be something like gid_t, int,
1621 ushort, or whatever type is used for the second argument to
1622 getgroups() and setgroups(). Usually, this is the same as
1623 gidtype (gid_t), but sometimes it isn't.
1626 This variable is be used internally by Configure to determine the
1627 full pathname (if any) of the gzip program. After Configure runs,
1628 the value is reset to a plain "gzip" and is not useful.
1630 h_fcntl (h_fcntl.U):
1631 This is variable gets set in various places to tell i_fcntl that
1632 <fcntl.h> should be included.
1634 h_sysfile (h_sysfile.U):
1635 This is variable gets set in various places to tell i_sys_file that
1636 <sys/file.h> should be included.
1639 Gives the type of hints used for previous answers. May be one of
1640 "default", "recommended" or "previous".
1643 This variable contains a command that produces the text of the
1644 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1645 "ypcat hosts" when NIS is used.
1648 This variable contains a flag which will tell the C compiler and loader
1649 to produce a program running with a huge memory model. If the
1650 huge model is not supported, contains the flag to produce large
1651 model programs. It is up to the Makefile to use this.
1653 i_arpainet (i_arpainet.U):
1654 This variable conditionally defines the I_ARPA_INET symbol,
1655 and indicates whether a C program should include <arpa/inet.h>.
1657 i_bsdioctl (i_sysioctl.U):
1658 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1659 indicates to the C program that <sys/bsdioctl.h> exists and should
1663 This variable conditionally defines the I_DB symbol, and indicates
1664 whether a C program may include Berkeley's DB include file <db.h>.
1667 This variable conditionally defines the I_DBM symbol, which
1668 indicates to the C program that <dbm.h> exists and should
1671 i_dirent (i_dirent.U):
1672 This variable conditionally defines I_DIRENT, which indicates
1673 to the C program that it should include <dirent.h>.
1676 This variable conditionally defines the I_DLD symbol, which
1677 indicates to the C program that <dld.h> (GNU dynamic loading)
1678 exists and should be included.
1680 i_dlfcn (i_dlfcn.U):
1681 This variable conditionally defines the I_DLFCN symbol, which
1682 indicates to the C program that <dlfcn.h> exists and should
1685 i_fcntl (i_fcntl.U):
1686 This variable controls the value of I_FCNTL (which tells
1687 the C program to include <fcntl.h>).
1689 i_float (i_float.U):
1690 This variable conditionally defines the I_FLOAT symbol, and indicates
1691 whether a C program may include <float.h> to get symbols like DBL_MAX
1692 or DBL_MIN, i.e. machine dependent floating point values.
1695 This variable conditionally defines the I_GDBM symbol, which
1696 indicates to the C program that <gdbm.h> exists and should
1700 This variable conditionally defines the I_GRP symbol, and indicates
1701 whether a C program should include <grp.h>.
1703 i_inttypes (i_inttypes.U):
1704 This variable conditionally defines the I_INTTYPES symbol,
1705 and indicates whether a C program should include <inttypes.h>.
1707 i_limits (i_limits.U):
1708 This variable conditionally defines the I_LIMITS symbol, and indicates
1709 whether a C program may include <limits.h> to get symbols like WORD_BIT
1712 i_locale (i_locale.U):
1713 This variable conditionally defines the I_LOCALE symbol,
1714 and indicates whether a C program should include <locale.h>.
1716 i_machcthr (i_machcthr.U):
1717 This variable conditionally defines the I_MACH_CTHREADS symbol,
1718 and indicates whether a C program should include <mach/cthreads.h>.
1720 i_malloc (i_malloc.U):
1721 This variable conditionally defines the I_MALLOC symbol, and indicates
1722 whether a C program should include <malloc.h>.
1725 This variable conditionally defines the I_MATH symbol, and indicates
1726 whether a C program may include <math.h>.
1728 i_memory (i_memory.U):
1729 This variable conditionally defines the I_MEMORY symbol, and indicates
1730 whether a C program should include <memory.h>.
1733 This variable conditionally defines the I_NDBM symbol, which
1734 indicates to the C program that <ndbm.h> exists and should
1737 i_netdb (i_netdb.U):
1738 This variable conditionally defines the I_NETDB symbol, and indicates
1739 whether a C program should include <netdb.h>.
1741 i_neterrno (i_neterrno.U):
1742 This variable conditionally defines the I_NET_ERRNO symbol, which
1743 indicates to the C program that <net/errno.h> exists and should
1747 This variable conditionally defines I_NETINET_IN, which indicates
1748 to the C program that it should include <netinet/in.h>. Otherwise,
1749 you may try <sys/in.h>.
1752 This variable conditionally defines the I_POLL symbol, and indicates
1753 whether a C program should include <poll.h>.
1756 This variable conditionally defines I_PWD, which indicates
1757 to the C program that it should include <pwd.h>.
1759 i_rpcsvcdbm (i_dbm.U):
1760 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1761 indicates to the C program that <rpcsvc/dbm.h> exists and should
1762 be included. Some System V systems might need this instead of <dbm.h>.
1765 This variable conditionally defines the I_SFIO symbol,
1766 and indicates whether a C program should include <sfio.h>.
1768 i_sgtty (i_termio.U):
1769 This variable conditionally defines the I_SGTTY symbol, which
1770 indicates to the C program that it should include <sgtty.h> rather
1773 i_stdarg (i_varhdr.U):
1774 This variable conditionally defines the I_STDARG symbol, which
1775 indicates to the C program that <stdarg.h> exists and should
1778 i_stddef (i_stddef.U):
1779 This variable conditionally defines the I_STDDEF symbol, which
1780 indicates to the C program that <stddef.h> exists and should
1783 i_stdlib (i_stdlib.U):
1784 This variable conditionally defines the I_STDLIB symbol, which
1785 indicates to the C program that <stdlib.h> exists and should
1788 i_string (i_string.U):
1789 This variable conditionally defines the I_STRING symbol, which
1790 indicates that <string.h> should be included rather than <strings.h>.
1792 i_sysaccess (i_sysaccess.U):
1793 This variable conditionally defines the I_SYS_ACCESS symbol,
1794 and indicates whether a C program should include <sys/access.h>.
1796 i_sysdir (i_sysdir.U):
1797 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1798 whether a C program should include <sys/dir.h>.
1800 i_sysfile (i_sysfile.U):
1801 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1802 whether a C program should include <sys/file.h> to get R_OK and friends.
1804 i_sysfilio (i_sysioctl.U):
1805 This variable conditionally defines the I_SYS_FILIO symbol, which
1806 indicates to the C program that <sys/filio.h> exists and should
1807 be included in preference to <sys/ioctl.h>.
1810 This variable conditionally defines I_SYS_IN, which indicates
1811 to the C program that it should include <sys/in.h> instead of
1814 i_sysioctl (i_sysioctl.U):
1815 This variable conditionally defines the I_SYS_IOCTL symbol, which
1816 indicates to the C program that <sys/ioctl.h> exists and should
1819 i_sysndir (i_sysndir.U):
1820 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1821 whether a C program should include <sys/ndir.h>.
1823 i_sysparam (i_sysparam.U):
1824 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1825 whether a C program should include <sys/param.h>.
1827 i_sysresrc (i_sysresrc.U):
1828 This variable conditionally defines the I_SYS_RESOURCE symbol,
1829 and indicates whether a C program should include <sys/resource.h>.
1831 i_syssecrt (i_syssecrt.U):
1832 This variable conditionally defines the I_SYS_SECURITY symbol,
1833 and indicates whether a C program should include <sys/security.h>.
1835 i_sysselct (i_sysselct.U):
1836 This variable conditionally defines I_SYS_SELECT, which indicates
1837 to the C program that it should include <sys/select.h> in order to
1838 get the definition of struct timeval.
1840 i_syssockio (i_sysioctl.U):
1841 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1842 C program that socket ioctl codes may be found in <sys/sockio.h>
1843 instead of <sys/ioctl.h>.
1845 i_sysstat (i_sysstat.U):
1846 This variable conditionally defines the I_SYS_STAT symbol,
1847 and indicates whether a C program should include <sys/stat.h>.
1849 i_systime (i_time.U):
1850 This variable conditionally defines I_SYS_TIME, which indicates
1851 to the C program that it should include <sys/time.h>.
1853 i_systimek (i_time.U):
1854 This variable conditionally defines I_SYS_TIME_KERNEL, which
1855 indicates to the C program that it should include <sys/time.h>
1856 with KERNEL defined.
1858 i_systimes (i_systimes.U):
1859 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1860 whether a C program should include <sys/times.h>.
1862 i_systypes (i_systypes.U):
1863 This variable conditionally defines the I_SYS_TYPES symbol,
1864 and indicates whether a C program should include <sys/types.h>.
1866 i_sysuio (i_sysuio.U):
1867 This variable conditionally defines the I_SYSUIO symbol, and indicates
1868 whether a C program should include <sys/uio.h>.
1870 i_sysun (i_sysun.U):
1871 This variable conditionally defines I_SYS_UN, which indicates
1872 to the C program that it should include <sys/un.h> to get UNIX
1873 domain socket definitions.
1875 i_syswait (i_syswait.U):
1876 This variable conditionally defines I_SYS_WAIT, which indicates
1877 to the C program that it should include <sys/wait.h>.
1879 i_termio (i_termio.U):
1880 This variable conditionally defines the I_TERMIO symbol, which
1881 indicates to the C program that it should include <termio.h> rather
1884 i_termios (i_termio.U):
1885 This variable conditionally defines the I_TERMIOS symbol, which
1886 indicates to the C program that the POSIX <termios.h> file is
1890 This variable conditionally defines I_TIME, which indicates
1891 to the C program that it should include <time.h>.
1893 i_unistd (i_unistd.U):
1894 This variable conditionally defines the I_UNISTD symbol, and indicates
1895 whether a C program should include <unistd.h>.
1897 i_utime (i_utime.U):
1898 This variable conditionally defines the I_UTIME symbol, and indicates
1899 whether a C program should include <utime.h>.
1901 i_values (i_values.U):
1902 This variable conditionally defines the I_VALUES symbol, and indicates
1903 whether a C program may include <values.h> to get symbols like MAXLONG
1906 i_varargs (i_varhdr.U):
1907 This variable conditionally defines I_VARARGS, which indicates
1908 to the C program that it should include <varargs.h>.
1910 i_varhdr (i_varhdr.U):
1911 Contains the name of the header to be included to get va_dcl definition.
1912 Typically one of varargs.h or stdarg.h.
1914 i_vfork (i_vfork.U):
1915 This variable conditionally defines the I_VFORK symbol, and indicates
1916 whether a C program should include vfork.h.
1918 ignore_versioned_solibs (libs.U):
1919 This variable should be non-empty if non-versioned shared
1920 libraries (libfoo.so.x.y) are to be ignored (because they
1921 cannot be linked against).
1924 This variable must preceed the normal include path to get hte
1925 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
1926 Value can be "" or "/bsd43" on mips.
1929 This variable is defined but not used by Configure.
1930 The value is a plain '' and is not useful.
1932 installarchlib (archlib.U):
1933 This variable is really the same as archlibexp but may differ on
1934 those systems using AFS. For extra portability, only this variable
1935 should be used in makefiles.
1938 This variable is the same as binexp unless AFS is running in which case
1939 the user is explicitely prompted for it. This variable should always
1940 be used in your makefiles for maximum portability.
1942 installman1dir (man1dir.U):
1943 This variable is really the same as man1direxp, unless you are using
1944 AFS in which case it points to the read/write location whereas
1945 man1direxp only points to the read-only access location. For extra
1946 portability, you should only use this variable within your makefiles.
1948 installman3dir (man3dir.U):
1949 This variable is really the same as man3direxp, unless you are using
1950 AFS in which case it points to the read/write location whereas
1951 man3direxp only points to the read-only access location. For extra
1952 portability, you should only use this variable within your makefiles.
1954 installprivlib (privlib.U):
1955 This variable is really the same as privlibexp but may differ on
1956 those systems using AFS. For extra portability, only this variable
1957 should be used in makefiles.
1959 installscript (scriptdir.U):
1960 This variable is usually the same as scriptdirexp, unless you are on
1961 a system running AFS, in which case they may differ slightly. You
1962 should always use this variable within your makefiles for portability.
1964 installsitearch (sitearch.U):
1965 This variable is really the same as sitearchexp but may differ on
1966 those systems using AFS. For extra portability, only this variable
1967 should be used in makefiles.
1969 installsitelib (sitelib.U):
1970 This variable is really the same as sitelibexp but may differ on
1971 those systems using AFS. For extra portability, only this variable
1972 should be used in makefiles.
1974 intsize (intsize.U):
1975 This variable contains the value of the INTSIZE symbol, which
1976 indicates to the C program how many bytes there are in an int.
1978 known_extensions (Extensions.U):
1979 This variable holds a list of all XS extensions included in
1983 This variable is defined but not used by Configure.
1984 The value is a plain '' and is not useful.
1987 This variable contains a flag which will tell the C compiler and loader
1988 to produce a program running with a large memory model. It is up to
1989 the Makefile to use this.
1992 This variable indicates the program to be used to link
1993 libraries for dynamic loading. On some systems, it is 'ld'.
1994 On ELF systems, it should be $cc. Mostly, we'll try to respect
1995 the hint file setting.
1997 lddlflags (dlsrc.U):
1998 This variable contains any special flags that might need to be
1999 passed to $ld to create a shared library suitable for dynamic
2000 loading. It is up to the makefile to use it. For hpux, it
2001 should be '-b'. For sunos 4.1, it is empty.
2003 ldflags (ccflags.U):
2004 This variable contains any additional C loader flags desired by
2005 the user. It is up to the Makefile to use this.
2008 This variable is be used internally by Configure to determine the
2009 full pathname (if any) of the less program. After Configure runs,
2010 the value is reset to a plain "less" and is not useful.
2013 This is an old synonym for _a.
2016 This variable contains the location of the C library.
2018 libperl (libperl.U):
2019 The perl executable is obtained by linking perlmain.c with
2020 libperl, any static extensions (usually just DynaLoader),
2021 and any other libraries needed on this system. libperl
2022 is usually libperl.a, but can also be libperl.so.xxx if
2023 the user wishes to build a perl executable with a shared
2027 This variable holds the general path used to find libraries. It is
2028 intended to be used by other units.
2031 This variable holds the additional libraries we want to use.
2032 It is up to the Makefile to deal with it.
2034 libswanted (Myinit.U):
2035 This variable holds a list of all the libraries we want to
2036 search. The order is chosen to pick up the c library
2037 ahead of ucb or bsd libraries for SVR4.
2040 This variable is defined but not used by Configure.
2041 The value is a plain '' and is not useful.
2044 This variable is defined but not used by Configure.
2045 The value is a plain '' and is not useful.
2047 lkflags (ccflags.U):
2048 This variable contains any additional C partial linker flags desired by
2049 the user. It is up to the Makefile to use this.
2052 This variable is be used internally by Configure to determine the
2053 full pathname (if any) of the ln program. After Configure runs,
2054 the value is reset to a plain "ln" and is not useful.
2057 This variable holds the name of the command to make
2058 symbolic links (if they are supported). It can be used
2059 in the Makefile. It is either 'ln -s' or 'ln'
2061 locincpth (ccflags.U):
2062 This variable contains a list of additional directories to be
2063 searched by the compiler. The appropriate '-I' directives will
2064 be added to ccflags. This is intended to simplify setting
2065 local directories from the Configure command line.
2066 It's not much, but it parallels the loclibpth stuff in libpth.U.
2068 loclibpth (libpth.U):
2069 This variable holds the paths used to find local libraries. It is
2070 prepended to libpth, and is intended to be easily set from the
2073 longdblsize (d_longdbl.U):
2074 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2075 indicates to the C program how many bytes there are in a long double,
2076 if this system supports long doubles.
2078 longlongsize (d_longlong.U):
2079 This variable contains the value of the LONGLONGSIZE symbol, which
2080 indicates to the C program how many bytes there are in a long long,
2081 if this system supports long long.
2083 longsize (intsize.U):
2084 This variable contains the value of the LONGSIZE symbol, which
2085 indicates to the C program how many bytes there are in a long.
2088 This variable is defined but not used by Configure.
2089 The value is a plain '' and is not useful.
2092 This variable is defined but not used by Configure.
2093 The value is a plain '' and is not useful.
2096 This variable is be used internally by Configure to determine the
2097 full pathname (if any) of the ls program. After Configure runs,
2098 the value is reset to a plain "ls" and is not useful.
2100 lseeksize (lseektype.U):
2101 This variable defines lseektype to be something like off_t, long,
2102 or whatever type is used to declare lseek offset's type in the
2103 kernel (which also appears to be lseek's return type).
2105 lseektype (lseektype.U):
2106 This variable defines lseektype to be something like off_t, long,
2107 or whatever type is used to declare lseek offset's type in the
2108 kernel (which also appears to be lseek's return type).
2111 This variable is defined but not used by Configure.
2112 The value is a plain '' and is not useful.
2115 This variable is defined but not used by Configure.
2116 The value is a plain '' and is not useful.
2119 This variable is be used internally by Configure to determine the
2120 full pathname (if any) of the make program. After Configure runs,
2121 the value is reset to a plain "make" and is not useful.
2123 make_set_make (make.U):
2124 Some versions of 'make' set the variable MAKE. Others do not.
2125 This variable contains the string to be included in Makefile.SH
2126 so that MAKE is set if needed, and not if not needed.
2127 Possible values are:
2128 make_set_make='#' # If your make program handles this for you,
2129 make_set_make="MAKE=$make" # if it doesn't.
2130 I used a comment character so that we can distinguish a
2131 'set' value (from a previous config.sh or Configure '-D' option)
2132 from an uncomputed value.
2134 mallocobj (mallocsrc.U):
2135 This variable contains the name of the malloc.o that this package
2136 generates, if that malloc.o is preferred over the system malloc.
2137 Otherwise the value is null. This variable is intended for generating
2138 Makefiles. See mallocsrc.
2140 mallocsrc (mallocsrc.U):
2141 This variable contains the name of the malloc.c that comes with
2142 the package, if that malloc.c is preferred over the system malloc.
2143 Otherwise the value is null. This variable is intended for generating
2146 malloctype (mallocsrc.U):
2147 This variable contains the kind of ptr returned by malloc and realloc.
2149 man1dir (man1dir.U):
2150 This variable contains the name of the directory in which manual
2151 source pages are to be put. It is the responsibility of the
2152 Makefile.SH to get the value of this into the proper command.
2153 You must be prepared to do the ~name expansion yourself.
2155 man1direxp (man1dir.U):
2156 This variable is the same as the man1dir variable, but is filename
2157 expanded at configuration time, for convenient use in makefiles.
2159 man1ext (man1dir.U):
2160 This variable contains the extension that the manual page should
2161 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2164 man3dir (man3dir.U):
2165 This variable contains the name of the directory in which manual
2166 source pages are to be put. It is the responsibility of the
2167 Makefile.SH to get the value of this into the proper command.
2168 You must be prepared to do the ~name expansion yourself.
2170 man3direxp (man3dir.U):
2171 This variable is the same as the man3dir variable, but is filename
2172 expanded at configuration time, for convenient use in makefiles.
2174 man3ext (man3dir.U):
2175 This variable contains the extension that the manual page should
2176 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2180 This variable contains a flag which will tell the C compiler and loader
2181 to produce a program running with a medium memory model. If the
2182 medium model is not supported, contains the flag to produce large
2183 model programs. It is up to the Makefile to use this.
2185 mips_type (usrinc.U):
2186 This variable holds the environment type for the mips system.
2187 Possible values are "BSD 4.3" and "System V".
2190 This variable is be used internally by Configure to determine the
2191 full pathname (if any) of the mkdir program. After Configure runs,
2192 the value is reset to a plain "mkdir" and is not useful.
2195 This variable contains the list of memory models supported by this
2196 system. Possible component values are none, split, unsplit, small,
2197 medium, large, and huge. The component values are space separated.
2199 modetype (modetype.U):
2200 This variable defines modetype to be something like mode_t,
2201 int, unsigned short, or whatever type is used to declare file
2202 modes for system calls.
2205 This variable is be used internally by Configure to determine the
2206 full pathname (if any) of the more program. After Configure runs,
2207 the value is reset to a plain "more" and is not useful.
2210 This variable is defined but not used by Configure.
2211 The value is a plain '' and is not useful.
2213 myarchname (archname.U):
2214 This variable holds the architecture name computed by Configure in
2215 a previous run. It is not intended to be perused by any user and
2216 should never be set in a hint file.
2218 mydomain (myhostname.U):
2219 This variable contains the eventual value of the MYDOMAIN symbol,
2220 which is the domain of the host the program is going to run on.
2221 The domain must be appended to myhostname to form a complete host name.
2222 The dot comes with mydomain, and need not be supplied by the program.
2224 myhostname (myhostname.U):
2225 This variable contains the eventual value of the MYHOSTNAME symbol,
2226 which is the name of the host the program is going to run on.
2227 The domain is not kept with hostname, but must be gotten from mydomain.
2228 The dot comes with mydomain, and need not be supplied by the program.
2230 myuname (Oldconfig.U):
2231 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2232 pseudo variables assignments in the output are stripped, thank you. The
2233 whole thing is then lower-cased.
2236 This variable contains the '-n' flag if that is what causes the echo
2237 command to suppress newline. Otherwise it is null. Correct usage is
2238 $echo $n "prompt for a question: $c".
2240 netdb_hlen_type (netdbtype.U):
2241 This variable holds the type used for the 2nd argument to
2242 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2243 This is only useful if you have gethostbyaddr(), naturally.
2245 netdb_host_type (netdbtype.U):
2246 This variable holds the type used for the 1st argument to
2247 gethostbyaddr(). Usually, this is char * or void *, possibly
2248 with or without a const prefix.
2249 This is only useful if you have gethostbyaddr(), naturally.
2251 netdb_name_type (netdbtype.U):
2252 This variable holds the type used for the argument to
2253 gethostbyname(). Usually, this is char * or const char *.
2254 This is only useful if you have gethostbyname(), naturally.
2256 netdb_net_type (netdbtype.U):
2257 This variable holds the type used for the 1st argument to
2258 getnetbyaddr(). Usually, this is int or long.
2259 This is only useful if you have getnetbyaddr(), naturally.
2262 This variable is be used internally by Configure to determine the
2263 full pathname (if any) of the nm program. After Configure runs,
2264 the value is reset to a plain "nm" and is not useful.
2267 This variable holds the options that may be necessary for nm.
2269 nm_so_opt (usenm.U):
2270 This variable holds the options that may be necessary for nm
2271 to work on a shared library but that can not be used on an
2272 archive library. Currently, this is only used by Linux, where
2273 nm --dynamic is *required* to get symbols from an ELF library which
2274 has been stripped, but nm --dynamic is *fatal* on an archive library.
2275 Maybe Linux should just always set usenm=false.
2277 nonxs_ext (Extensions.U):
2278 This variable holds a list of all non-xs extensions included
2279 in the package. All of them will be built.
2282 This variable is be used internally by Configure to determine the
2283 full pathname (if any) of the nroff program. After Configure runs,
2284 the value is reset to a plain "nroff" and is not useful.
2286 o_nonblock (nblock_io.U):
2287 This variable bears the symbol value to be used during open() or fcntl()
2288 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2289 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2290 but that is only supported by some devices.
2293 This is an old synonym for _o.
2295 optimize (ccflags.U):
2296 This variable contains any optimizer/debugger flag that should be used.
2297 It is up to the Makefile to use it.
2299 orderlib (orderlib.U):
2300 This variable is "true" if the components of libraries must be ordered
2301 (with `lorder $* | tsort`) before placing them in an archive. Set to
2302 "false" if ranlib or ar can generate random libraries.
2304 osname (Oldconfig.U):
2305 This variable contains the operating system name (e.g. sunos,
2306 solaris, hpux, etc.). It can be useful later on for setting
2307 defaults. Any spaces are replaced with underscores. It is set
2308 to a null string if we can't figure it out.
2310 osvers (Oldconfig.U):
2311 This variable contains the operating system version (e.g.
2312 4.1.3, 5.2, etc.). It is primarily used for helping select
2313 an appropriate hints file, but might be useful elsewhere for
2314 setting defaults. It is set to '' if we can't figure it out.
2315 We try to be flexible about how much of the version number
2316 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2317 same for this package, hints files might just be os_4.0 or
2318 os_4.1, etc., not keeping separate files for each little release.
2320 package (package.U):
2321 This variable contains the name of the package being constructed.
2322 It is primarily intended for the use of later Configure units.
2325 This variable contains the name of the preferred pager on the system.
2326 Usual values are (the full pathnames of) more, less, pg, or cat.
2329 This variable contains a command that produces the text of the
2330 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2331 "ypcat passwd" when NIS is used.
2333 patchlevel (patchlevel.U):
2334 The patchlevel level of this package.
2335 The value of patchlevel comes from the patchlevel.h file.
2338 This is an old synonym for p_ in Head.U, the character
2339 used to separate elements in the command shell search PATH.
2342 This variable is defined but not used by Configure.
2343 The value is a plain '' and is not useful.
2345 perladmin (perladmin.U):
2346 Electronic mail address of the perl5 administrator.
2348 perlpath (perlpath.U):
2349 This variable contains the eventual value of the PERLPATH symbol,
2350 which contains the name of the perl interpreter to be used in
2351 shell scripts and in the "eval 'exec'" idiom.
2354 This variable is be used internally by Configure to determine the
2355 full pathname (if any) of the pg program. After Configure runs,
2356 the value is reset to a plain "pg" and is not useful.
2358 phostname (myhostname.U):
2359 This variable contains the eventual value of the PHOSTNAME symbol,
2360 which is a command that can be fed to popen() to get the host name.
2361 The program should probably not presume that the domain is or isn't
2364 pidtype (pidtype.U):
2365 This variable defines PIDTYPE to be something like pid_t, int,
2366 ushort, or whatever type is used to declare process ids in the kernel.
2369 Holds the private path used by Configure to find out the libraries.
2370 Its value is prepend to libpth. This variable takes care of special
2371 machines, like the mips. Usually, it should be empty.
2374 This variable is defined but not used by Configure.
2375 The value is a plain '' and is not useful.
2378 This variable is defined but not used by Configure.
2379 The value is a plain '' and is not useful.
2382 This variable holds the name of the directory below which the
2383 user will install the package. Usually, this is /usr/local, and
2384 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2385 man pages in /usr/local/man, etc. It is only used to set defaults
2386 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2388 prefixexp (prefix.U):
2389 This variable holds the full absolute path of the directory below
2390 which the user will install the package. Derived from prefix.
2392 privlib (privlib.U):
2393 This variable contains the eventual value of the PRIVLIB symbol,
2394 which is the name of the private library for this package. It may
2395 have a ~ on the front. It is up to the makefile to eventually create
2396 this directory while performing installation (with ~ substitution).
2398 privlibexp (privlib.U):
2399 This variable is the ~name expanded version of privlib, so that you
2400 may use it directly in Makefiles or shell scripts.
2402 prototype (prototype.U):
2403 This variable holds the eventual value of CAN_PROTOTYPE, which
2404 indicates the C compiler can handle funciton prototypes.
2406 pthread_create_joinable (d_pthrattrj.U):
2407 This variable defines the constant to use for creating joinable
2408 (aka undetached) pthreads. Unused if pthread.h defines
2409 PTHREAD_CREATE_JOINABLE. If used, possible values are
2410 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2412 ptrsize (ptrsize.U):
2413 This variable contains the value of the PTRSIZE symbol, which
2414 indicates to the C program how many bytes there are in a pointer.
2416 randbits (randfunc.U):
2417 Indicates how many bits are produced by the function used to
2418 generate normalized random numbers.
2420 randfunc (randfunc.U):
2421 Indicates the name of the random number function to use.
2422 Values include drand48, random, and rand. In C programs,
2423 the 'Drand01' macro is defined to generate uniformly distributed
2424 random numbers over the range [0., 1.[ (see drand01 and nrand).
2426 randseedtype (randfunc.U):
2427 Indicates the type of the argument of the seedfunc.
2429 ranlib (orderlib.U):
2430 This variable is set to the pathname of the ranlib program, if it is
2431 needed to generate random libraries. Set to ":" if ar can generate
2432 random libraries or if random libraries are not supported
2434 rd_nodata (nblock_io.U):
2435 This variable holds the return code from read() when no data is
2436 present. It should be -1, but some systems return 0 when O_NDELAY is
2437 used, which is a shame because you cannot make the difference between
2438 no data and an EOF.. Sigh!
2441 This variable is be used internally by Configure to determine the
2442 full pathname (if any) of the rm program. After Configure runs,
2443 the value is reset to a plain "rm" and is not useful.
2446 This variable is defined but not used by Configure.
2447 The value is a plain '' and is not useful.
2450 This variable contains 'true' or 'false' depending whether the
2451 nm extraction should be performed or not, according to the value
2452 of usenm and the flags on the Configure command line.
2454 sched_yield (d_pthread_y.U):
2455 This variable defines the way to yield the execution
2456 of the current thread.
2458 scriptdir (scriptdir.U):
2459 This variable holds the name of the directory in which the user wants
2460 to put publicly scripts for the package in question. It is either
2461 the same directory as for binaries, or a special one that can be
2462 mounted across different architectures, like /usr/share. Programs
2463 must be prepared to deal with ~name expansion.
2465 scriptdirexp (scriptdir.U):
2466 This variable is the same as scriptdir, but is filename expanded
2467 at configuration time, for programs not wanting to bother with it.
2470 This variable is be used internally by Configure to determine the
2471 full pathname (if any) of the sed program. After Configure runs,
2472 the value is reset to a plain "sed" and is not useful.
2474 seedfunc (randfunc.U):
2475 Indicates the random number generating seed function.
2476 Values include srand48, srandom, and srand.
2478 selectminbits (selectminbits.U):
2479 This variable holds the minimum number of bits operated by select.
2480 That is, if you do select(n, ...), how many bits at least will be
2481 cleared in the masks if some activity is detected. Usually this
2482 is either n or 32*ceil(n/32), especially many little-endians do
2483 the latter. This is only useful if you have select(), naturally.
2485 selecttype (selecttype.U):
2486 This variable holds the type used for the 2nd, 3rd, and 4th
2487 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2488 is defined, and 'int *' otherwise. This is only useful if you
2489 have select(), naturally.
2492 This variable is defined but not used by Configure.
2493 The value is a plain '' and is not useful.
2496 This variable contains the full pathname of the shell used
2497 on this system to execute Bourne shell scripts. Usually, this will be
2498 /bin/sh, though it's possible that some systems will have /bin/ksh,
2499 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2501 This unit comes before Options.U, so you can't set sh with a '-D'
2502 option, though you can override this (and startsh)
2503 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2506 This variable is defined but not used by Configure.
2507 The value is a plain '' and is not useful.
2509 sharpbang (spitshell.U):
2510 This variable contains the string #! if this system supports that
2513 shmattype (d_shmat.U):
2514 This symbol contains the type of pointer returned by shmat().
2515 It can be 'void *' or 'char *'.
2517 shortsize (intsize.U):
2518 This variable contains the value of the SHORTSIZE symbol which
2519 indicates to the C program how many bytes there are in a short.
2521 shrpenv (libperl.U):
2522 If the user builds a shared libperl.so, then we need to tell the
2523 'perl' executable where it will be able to find the installed libperl.so.
2524 One way to do this on some systems is to set the environment variable
2525 LD_RUN_PATH to the directory that will be the final location of the
2526 shared libperl.so. The makefile can use this with something like
2527 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2529 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2532 See the main perl Makefile.SH for actual working usage.
2533 Alternatively, we might be able to use a command line option such
2534 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2535 $archlibexp/CORE (Linux).
2537 shsharp (spitshell.U):
2538 This variable tells further Configure units whether your sh can
2541 sig_name (sig_name.U):
2542 This variable holds the signal names, space separated. The leading
2543 SIG in signal name is removed. A ZERO is prepended to the
2544 list. This is currently not used.
2546 sig_name_init (sig_name.U):
2547 This variable holds the signal names, enclosed in double quotes and
2548 separated by commas, suitable for use in the SIG_NAME definition
2549 below. A "ZERO" is prepended to the list, and the list is
2550 terminated with a plain 0. The leading SIG in signal names
2551 is removed. See sig_num.
2553 sig_num (sig_name.U):
2554 This variable holds the signal numbers, space separated. A ZERO is
2555 prepended to the list (corresponding to the fake SIGZERO), and
2556 the list is terminated with a 0. Those numbers correspond to
2557 the value of the signal listed in the same place within the
2560 sig_num_init (sig_name.U):
2561 This variable holds the signal numbers, enclosed in double quotes and
2562 separated by commas, suitable for use in the SIG_NUM definition
2563 below. A "ZERO" is prepended to the list, and the list is
2564 terminated with a plain 0.
2566 signal_t (d_voidsig.U):
2567 This variable holds the type of the signal handler (void or int).
2569 sitearch (sitearch.U):
2570 This variable contains the eventual value of the SITEARCH symbol,
2571 which is the name of the private library for this package. It may
2572 have a ~ on the front. It is up to the makefile to eventually create
2573 this directory while performing installation (with ~ substitution).
2575 sitearchexp (sitearch.U):
2576 This variable is the ~name expanded version of sitearch, so that you
2577 may use it directly in Makefiles or shell scripts.
2579 sitelib (sitelib.U):
2580 This variable contains the eventual value of the SITELIB symbol,
2581 which is the name of the private library for this package. It may
2582 have a ~ on the front. It is up to the makefile to eventually create
2583 this directory while performing installation (with ~ substitution).
2585 sitelibexp (sitelib.U):
2586 This variable is the ~name expanded version of sitelib, so that you
2587 may use it directly in Makefiles or shell scripts.
2589 sizetype (sizetype.U):
2590 This variable defines sizetype to be something like size_t,
2591 unsigned long, or whatever type is used to declare length
2592 parameters for string functions.
2595 This variable is defined but not used by Configure.
2596 The value is a plain '' and is not useful.
2599 This variable is defined but not used by Configure.
2600 The value is a plain '' and is not useful.
2603 This variable contains a flag which will tell the C compiler and loader
2604 to produce a program running with a small memory model. It is up to
2605 the Makefile to use this.
2608 This variable holds the extension used to identify shared libraries
2609 (also known as shared objects) on the system. Usually set to 'so'.
2611 sockethdr (d_socket.U):
2612 This variable has any cpp '-I' flags needed for socket support.
2614 socketlib (d_socket.U):
2615 This variable has the names of any libraries needed for socket support.
2618 This variable is be used internally by Configure to determine the
2619 full pathname (if any) of the sort program. After Configure runs,
2620 the value is reset to a plain "sort" and is not useful.
2622 spackage (package.U):
2623 This variable contains the name of the package being constructed,
2624 with the first letter uppercased, i.e. suitable for starting
2627 spitshell (spitshell.U):
2628 This variable contains the command necessary to spit out a runnable
2629 shell on this system. It is either cat or a grep '-v' for # comments.
2632 This variable contains a flag which will tell the C compiler and loader
2633 to produce a program that will run in separate I and D space, for those
2634 machines that support separation of instruction and data space. It is
2635 up to the Makefile to use this.
2638 This variable holds the path to the package source. It is up to
2639 the Makefile to use this variable and set VPATH accordingly to
2640 find the sources remotely.
2642 ssizetype (ssizetype.U):
2643 This variable defines ssizetype to be something like ssize_t,
2644 long or int. It is used by functions that return a count
2645 of bytes or an error condition. It must be a signed type.
2646 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2648 startperl (startperl.U):
2649 This variable contains the string to put on the front of a perl
2650 script to make sure (hopefully) that it runs with perl and not some
2651 shell. Of course, that leading line must be followed by the classical
2653 eval 'exec perl -S $0 ${1+"$@"}'
2654 if $running_under_some_shell;
2655 to guarantee perl startup should the shell execute the script. Note
2656 that this magic incatation is not understood by csh.
2658 startsh (startsh.U):
2659 This variable contains the string to put on the front of a shell
2660 script to make sure (hopefully) that it runs with sh and not some
2663 static_ext (Extensions.U):
2664 This variable holds a list of XS extension files we want to
2665 link statically into the package. It is used by Makefile.
2667 stdchar (stdchar.U):
2668 This variable conditionally defines STDCHAR to be the type of char
2669 used in stdio.h. It has the values "unsigned char" or "char".
2671 stdio_base (d_stdstdio.U):
2672 This variable defines how, given a FILE pointer, fp, to access the
2673 _base field (or equivalent) of stdio.h's FILE structure. This will
2674 be used to define the macro FILE_base(fp).
2676 stdio_bufsiz (d_stdstdio.U):
2677 This variable defines how, given a FILE pointer, fp, to determine
2678 the number of bytes store in the I/O buffer pointer to by the
2679 _base field (or equivalent) of stdio.h's FILE structure. This will
2680 be used to define the macro FILE_bufsiz(fp).
2682 stdio_cnt (d_stdstdio.U):
2683 This variable defines how, given a FILE pointer, fp, to access the
2684 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2685 be used to define the macro FILE_cnt(fp).
2687 stdio_filbuf (d_stdstdio.U):
2688 This variable defines how, given a FILE pointer, fp, to tell
2689 stdio to refill it's internal buffers (?). This will
2690 be used to define the macro FILE_filbuf(fp).
2692 stdio_ptr (d_stdstdio.U):
2693 This variable defines how, given a FILE pointer, fp, to access the
2694 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2695 be used to define the macro FILE_ptr(fp).
2697 strings (i_string.U):
2698 This variable holds the full path of the string header that will be
2699 used. Typically /usr/include/string.h or /usr/include/strings.h.
2702 This variable is defined but not used by Configure.
2703 The value is a plain '' and is not useful.
2705 subversion (patchlevel.U):
2706 The subversion level of this package.
2707 The value of subversion comes from the patchlevel.h file.
2708 This is unique to perl.
2711 This variable holds the place where the manual is located on this
2712 system. It is not the place where the user wants to put his manual
2713 pages. Rather it is the place where Configure may look to find manual
2714 for unix commands (section 1 of the manual usually). See mansrc.
2717 This variable is defined but not used by Configure.
2718 The value is a plain '' and is not useful.
2721 This variable is defined but not used by Configure.
2722 The value is a plain '' and is not useful.
2725 This variable is defined but not used by Configure.
2726 The value is a plain '' and is not useful.
2729 This variable is be used internally by Configure to determine the
2730 full pathname (if any) of the tee program. After Configure runs,
2731 the value is reset to a plain "tee" and is not useful.
2734 This variable is be used internally by Configure to determine the
2735 full pathname (if any) of the test program. After Configure runs,
2736 the value is reset to a plain "test" and is not useful.
2738 timeincl (i_time.U):
2739 This variable holds the full path of the included time header(s).
2741 timetype (d_time.U):
2742 This variable holds the type returned by time(). It can be long,
2743 or time_t on BSD sites (in which case <sys/types.h> should be
2744 included). Anyway, the type Time_t should be used.
2747 This variable is be used internally by Configure to determine the
2748 full pathname (if any) of the touch program. After Configure runs,
2749 the value is reset to a plain "touch" and is not useful.
2752 This variable is be used internally by Configure to determine the
2753 full pathname (if any) of the tr program. After Configure runs,
2754 the value is reset to a plain "tr" and is not useful.
2757 This variable contains the value to be passed to the tr(1)
2758 command to transliterate a newline. Typical values are
2759 '\012' and '\n'. This is needed for EBCDIC systems where
2760 newline is not necessarily '\012'.
2763 This variable is defined but not used by Configure.
2764 The value is a plain '' and is not useful.
2766 uidtype (uidtype.U):
2767 This variable defines Uid_t to be something like uid_t, int,
2768 ushort, or whatever type is used to declare user ids in the kernel.
2771 This variable is be used internally by Configure to determine the
2772 full pathname (if any) of the uname program. After Configure runs,
2773 the value is reset to a plain "uname" and is not useful.
2776 This variable is be used internally by Configure to determine the
2777 full pathname (if any) of the uniq program. After Configure runs,
2778 the value is reset to a plain "uniq" and is not useful.
2780 use64bits (use64bits.U):
2781 This variable conditionally defines the USE_64_BITS symbol,
2782 and indicates that explicit 64-bit interfaces should be used
2786 This variable indicates if the the system supports dynamic
2787 loading of some sort. See also dlsrc and dlobj.
2789 usemultiplicity (usemultiplicity.U):
2790 This variable conditionally defines the MULTIPLICITY symbol,
2791 and indicates that Perl should be built to use multiplicity.
2793 usemymalloc (mallocsrc.U):
2794 This variable contains y if the malloc that comes with this package
2795 is desired over the system's version of malloc. People often include
2796 special versions of malloc for effiency, but such versions are often
2797 less portable. See also mallocsrc and mallocobj.
2798 If this is 'y', then -lmalloc is removed from $libs.
2801 This variable contains 'true' or 'false' depending whether the
2802 nm extraction is wanted or not.
2804 useopcode (Extensions.U):
2805 This variable holds either 'true' or 'false' to indicate
2806 whether the Opcode extension should be used. The sole
2807 use for this currently is to allow an easy mechanism
2808 for users to skip the Opcode extension from the Configure
2811 useperlio (useperlio.U):
2812 This variable conditionally defines the USE_PERLIO symbol,
2813 and indicates that the PerlIO abstraction should be
2816 useposix (Extensions.U):
2817 This variable holds either 'true' or 'false' to indicate
2818 whether the POSIX extension should be used. The sole
2819 use for this currently is to allow an easy mechanism
2820 for hints files to indicate that POSIX will not compile
2821 on a particular system.
2824 This variable is set to true when the user agrees to use sfio.
2825 It is set to false when sfio is not available or when the user
2826 explicitely requests not to use sfio. It is here primarily so
2827 that command-line settings can override the auto-detection of
2828 d_sfio without running into a "WHOA THERE".
2830 useshrplib (libperl.U):
2831 This variable is set to 'yes' if the user wishes
2832 to build a shared libperl, and 'no' otherwise.
2834 usethreads (usethreads.U):
2835 This variable conditionally defines the USE_THREADS symbol,
2836 and indicates that Perl should be built to use threads.
2838 usevfork (d_vfork.U):
2839 This variable is set to true when the user accepts to use vfork.
2840 It is set to false when no vfork is available or when the user
2841 explicitely requests not to use vfork.
2844 This variable holds the path of the include files, which is
2845 usually /usr/include. It is mainly used by other Configure units.
2848 This variable is defined but not used by Configure.
2849 The value is a plain '' and is not useful.
2851 version (patchlevel.U):
2852 The full version number of this package. This combines
2853 baserev, patchlevel, and subversion to get the full
2854 version number, including any possible subversions. Care
2855 is taken to use the C locale in order to get something
2856 like 5.004 instead of 5,004. This is unique to perl.
2859 This variable is defined but not used by Configure.
2860 The value is a plain '' and is not useful.
2862 voidflags (voidflags.U):
2863 This variable contains the eventual value of the VOIDFLAGS symbol,
2864 which indicates how much support of the void type is given by this
2865 compiler. See VOIDFLAGS for more info.
2868 This variable is defined but not used by Configure.
2869 The value is a plain '' and is not useful.
2872 This variable is be used internally by Configure to determine the
2873 full pathname (if any) of the zip program. After Configure runs,
2874 the value is reset to a plain "zip" and is not useful.