1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double. Usual values are 2, 4 and 8.
31 ansi2knr (ansi2knr.U):
32 This variable is set if the user needs to run ansi2knr.
33 Currently, this is not supported, so we just abort.
35 aphostname (d_gethname.U):
36 This variable contains the command which can be used to compute the
37 host name. The command is fully qualified by its absolute path, to make
38 it safe when used by a process with super-user privileges.
40 apiversion (patchlevel.U):
41 This is a number which identifies the lowest version of perl
42 to have an API (for XS extensions) compatible with the present
43 version. For example, for 5.005_01, the apiversion should be
44 5.005, since 5.005_01 should be binary compatible with 5.005.
45 This should probably be incremented manually somehow, perhaps
46 from patchlevel.h. For now, we'll guess maintenance subversions
47 will retain binary compatibility.
50 This variable is be used internally by Configure to determine the
51 full pathname (if any) of the ar program. After Configure runs,
52 the value is reset to a plain "ar" and is not useful.
55 This variable holds the name of the directory in which the user wants
56 to put architecture-dependent public library files for $package.
57 It is most often a local directory such as /usr/local/lib.
58 Programs using this variable must be prepared to deal
59 with filename expansion.
61 archlibexp (archlib.U):
62 This variable is the same as the archlib variable, but is
63 filename expanded at configuration time, for convenient use.
65 archname64 (use64bits.U):
66 This variable is used for the 64-bitness part of $archname.
68 archname (archname.U):
69 This variable is a short name to characterize the current
70 architecture. It is used mainly to construct the default archlib.
73 This variable defines any additional objects that must be linked
74 in with the program on this architecture. On unix, it is usually
75 empty. It is typically used to include emulations of unix calls
76 or other facilities. For perl on OS/2, for example, this would
80 This variable is be used internally by Configure to determine the
81 full pathname (if any) of the awk program. After Configure runs,
82 the value is reset to a plain "awk" and is not useful.
85 The base revision level of this package, from the .package file.
88 This variable is defined but not used by Configure.
89 The value is a plain '' and is not useful.
92 This variable holds the name of the directory in which the user wants
93 to put publicly executable images for the package in question. It
94 is most often a local directory such as /usr/local/bin. Programs using
95 this variable must be prepared to deal with ~name substitution.
97 bincompat5005 (bincompat5005.U):
98 This variable contains y if Perl 5.006 should be binary-compatible
102 This is the same as the bin variable, but is filename expanded at
103 configuration time, for use in your makefiles.
106 This variable is defined but not used by Configure.
107 The value is a plain '' and is not useful.
110 This variable is be used internally by Configure to determine the
111 full pathname (if any) of the byacc program. After Configure runs,
112 the value is reset to a plain "byacc" and is not useful.
114 byteorder (byteorder.U):
115 This variable holds the byte order. In the following, larger digits
116 indicate more significance. The variable byteorder is either 4321
117 on a big-endian machine, or 1234 on a little-endian, or 87654321
118 on a Cray ... or 3412 with weird order !
121 This variable contains the \c string if that is what causes the echo
122 command to suppress newline. Otherwise it is null. Correct usage is
123 $echo $n "prompt for a question: $c".
125 castflags (d_castneg.U):
126 This variable contains a flag that precise difficulties the
127 compiler has casting odd floating values to unsigned long:
129 1 = couldn't cast < 0
130 2 = couldn't cast >= 0x80000000
131 4 = couldn't cast in argument expression list
134 This variable is be used internally by Configure to determine the
135 full pathname (if any) of the cat program. After Configure runs,
136 the value is reset to a plain "cat" and is not useful.
139 This variable holds the name of a command to execute a C compiler which
140 can resolve multiple global references that happen to have the same
141 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
143 cccdlflags (dlsrc.U):
144 This variable contains any special flags that might need to be
145 passed with 'cc -c' to compile modules to be used to create a shared
146 library that will be used for dynamic loading. For hpux, this
147 should be +z. It is up to the makefile to use it.
150 This variable contains any special flags that might need to be
151 passed to cc to link with a shared library for dynamic loading.
152 It is up to the makefile to use it. For sunos 4.1, it should
156 This variable contains any additional C compiler flags desired by
157 the user. It is up to the Makefile to use this.
159 ccsymbols (Cppsym.U):
160 The variable contains the symbols defined by the C compiler alone.
161 The symbols defined by cpp or by cc when it calls cpp are not in
162 this list, see cppsymbols and cppccsymbols.
163 The list is a space-separated list of symbol=value tokens.
166 Login name of the person who ran the Configure script and answered the
167 questions. This is used to tag both config.sh and config_h.SH.
169 cf_email (cf_email.U):
170 Electronic mail address of the person who ran Configure. This can be
171 used by units that require the user's e-mail, like MailList.U.
174 Holds the output of the "date" command when the configuration file was
175 produced. This is used to tag both config.sh and config_h.SH.
178 This variable is defined but not used by Configure.
179 The value is a plain '' and is not useful.
182 This variable is defined but not used by Configure.
183 The value is a plain '' and is not useful.
186 This variable is defined but not used by Configure.
187 The value is a plain '' and is not useful.
189 clocktype (d_times.U):
190 This variable holds the type returned by times(). It can be long,
191 or clock_t on BSD sites (in which case <sys/types.h> should be
195 This variable is be used internally by Configure to determine the
196 full pathname (if any) of the comm program. After Configure runs,
197 the value is reset to a plain "comm" and is not useful.
200 This variable is defined but not used by Configure.
201 The value is a plain '' and is not useful.
203 contains (contains.U):
204 This variable holds the command to do a grep with a proper return
205 status. On most sane systems it is simply "grep". On insane systems
206 it is a grep followed by a cat followed by a test. This variable
207 is primarily for the use of other Configure units.
210 This variable is be used internally by Configure to determine the
211 full pathname (if any) of the cp program. After Configure runs,
212 the value is reset to a plain "cp" and is not useful.
215 This variable is defined but not used by Configure.
216 The value is a plain '' and is not useful.
219 This variable is be used internally by Configure to determine the
220 full pathname (if any) of the cpp program. After Configure runs,
221 the value is reset to a plain "cpp" and is not useful.
223 cpp_stuff (cpp_stuff.U):
224 This variable contains an identification of the catenation mechanism
225 used by the C preprocessor.
227 cppccsymbols (Cppsym.U):
228 The variable contains the symbols defined by the C compiler when
229 when it calls cpp. The symbols defined by the cc alone or cpp
230 alone are not in this list, see ccsymbols and cppsymbols.
231 The list is a space-separated list of symbol=value tokens.
233 cppflags (ccflags.U):
234 This variable holds the flags that will be passed to the C pre-
235 processor. It is up to the Makefile to use it.
237 cpplast (cppstdin.U):
238 This variable has the same functionality as cppminus, only it applies
239 to cpprun and not cppstdin.
241 cppminus (cppstdin.U):
242 This variable contains the second part of the string which will invoke
243 the C preprocessor on the standard input and produce to standard
244 output. This variable will have the value "-" if cppstdin needs
245 a minus to specify standard input, otherwise the value is "".
248 This variable contains the command which will invoke a C preprocessor
249 on standard input and put the output to stdout. It is guaranteed not
250 to be a wrapper and may be a null string if no preprocessor can be
251 made directly available. This preprocessor might be different from the
252 one used by the C compiler. Don't forget to append cpplast after the
253 preprocessor options.
255 cppstdin (cppstdin.U):
256 This variable contains the command which will invoke the C
257 preprocessor on standard input and put the output to stdout.
258 It is primarily used by other Configure units that ask about
259 preprocessor symbols.
261 cppsymbols (Cppsym.U):
262 The variable contains the symbols defined by the C preprocessor
263 alone. The symbols defined by cc or by cc when it calls cpp are
264 not in this list, see ccsymbols and cppccsymbols.
265 The list is a space-separated list of symbol=value tokens.
267 crosscompile (crosscompile.U):
268 This variable conditionally defines the CROSSCOMPILE symbol
269 which signifies that the build process is be a cross-compilation.
270 This is normally set by hints files or from Configure command line.
272 cryptlib (d_crypt.U):
273 This variable holds -lcrypt or the path to a libcrypt.a archive if
274 the crypt() function is not defined in the standard C library. It is
275 up to the Makefile to use this.
278 This variable is be used internally by Configure to determine the
279 full pathname (if any) of the csh program. After Configure runs,
280 the value is reset to a plain "csh" and is not useful.
282 d_access (d_access.U):
283 This variable conditionally defines HAS_ACCESS if the access() system
284 call is available to check for access permissions using real IDs.
286 d_accessx (d_accessx.U):
287 This variable conditionally defines the HAS_ACCESSX symbol, which
288 indicates to the C program that the accessx() routine is available.
291 This variable conditionally defines the HAS_ALARM symbol, which
292 indicates to the C program that the alarm() routine is available.
294 d_archlib (archlib.U):
295 This variable conditionally defines ARCHLIB to hold the pathname
296 of architecture-dependent library files for $package. If
297 $archlib is the same as $privlib, then this is set to undef.
300 This variable conditionally defines the HAS_ATOLF symbol, which
301 indicates to the C program that the atolf() routine is available.
304 This variable conditionally defines the HAS_ATOLL symbol, which
305 indicates to the C program that the atoll() routine is available.
307 d_attribut (d_attribut.U):
308 This variable conditionally defines HASATTRIBUTE, which
309 indicates the C compiler can check for function attributes,
310 such as printf formats.
313 This variable conditionally defines the HAS_BCMP symbol if
314 the bcmp() routine is available to compare strings.
317 This variable conditionally defines the HAS_BCOPY symbol if
318 the bcopy() routine is available to copy strings.
320 d_bincompat5005 (bincompat5005.U):
321 This variable conditionally defines BINCOMPAT5005 so that embed.h
322 can take special action if Perl 5.006 should be binary-compatible
323 with Perl 5.005. This is impossible for builds that use features
324 like threads and multiplicity it is always $undef for those versions.
327 This symbol conditionally defines the symbol BSD when running on a
330 d_bsdgetpgrp (d_getpgrp.U):
331 This variable conditionally defines USE_BSD_GETPGRP if
332 getpgrp needs one arguments whereas USG one needs none.
334 d_bsdsetpgrp (d_setpgrp.U):
335 This variable conditionally defines USE_BSD_SETPGRP if
336 setpgrp needs two arguments whereas USG one needs none.
337 See also d_setpgid for a POSIX interface.
340 This variable conditionally defines the HAS_BZERO symbol if
341 the bzero() routine is available to set memory to 0.
343 d_casti32 (d_casti32.U):
344 This variable conditionally defines CASTI32, which indicates
345 whether the C compiler can cast large floats to 32-bit ints.
347 d_castneg (d_castneg.U):
348 This variable conditionally defines CASTNEG, which indicates
349 wether the C compiler can cast negative float to unsigned.
351 d_charvspr (d_vprintf.U):
352 This variable conditionally defines CHARVSPRINTF if this system
353 has vsprintf returning type (char*). The trend seems to be to
354 declare it as "int vsprintf()".
357 This variable conditionally defines the HAS_CHOWN symbol, which
358 indicates to the C program that the chown() routine is available.
360 d_chroot (d_chroot.U):
361 This variable conditionally defines the HAS_CHROOT symbol, which
362 indicates to the C program that the chroot() routine is available.
364 d_chsize (d_chsize.U):
365 This variable conditionally defines the CHSIZE symbol, which
366 indicates to the C program that the chsize() routine is available
367 to truncate files. You might need a -lx to get this routine.
369 d_closedir (d_closedir.U):
370 This variable conditionally defines HAS_CLOSEDIR if closedir() is
373 d_cmsghdr_s (d_socket.U):
374 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
375 which indicates that the the struct cmsghdr is supported.
378 This variable conditionally defines the HASCONST symbol, which
379 indicates to the C program that this C compiler knows about the
383 This variable conditionally defines the CRYPT symbol, which
384 indicates to the C program that the crypt() routine is available
385 to encrypt passwords and the like.
388 This variable conditionally defines the CSH symbol, which
389 indicates to the C program that the C-shell exists.
391 d_cuserid (d_cuserid.U):
392 This variable conditionally defines the HAS_CUSERID symbol, which
393 indicates to the C program that the cuserid() routine is available
394 to get character login names.
396 d_dbl_dig (d_dbl_dig.U):
397 This variable conditionally defines d_dbl_dig if this system's
398 header files provide DBL_DIG, which is the number of significant
399 digits in a double precision number.
401 d_difftime (d_difftime.U):
402 This variable conditionally defines the HAS_DIFFTIME symbol, which
403 indicates to the C program that the difftime() routine is available.
405 d_dirnamlen (i_dirent.U):
406 This variable conditionally defines DIRNAMLEN, which indicates
407 to the C program that the length of directory entry names is
408 provided by a d_namelen field.
410 d_dlerror (d_dlerror.U):
411 This variable conditionally defines the HAS_DLERROR symbol, which
412 indicates to the C program that the dlerror() routine is available.
414 d_dlopen (d_dlopen.U):
415 This variable conditionally defines the HAS_DLOPEN symbol, which
416 indicates to the C program that the dlopen() routine is available.
418 d_dlsymun (d_dlsymun.U):
419 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
420 indicates that we need to prepend an underscore to the symbol
421 name before calling dlsym().
423 d_dosuid (d_dosuid.U):
424 This variable conditionally defines the symbol DOSUID, which
425 tells the C program that it should insert setuid emulation code
426 on hosts which have setuid #! scripts disabled.
428 d_drand48proto (d_drand48proto.U):
429 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
430 which indicates to the C program that the system provides
431 a prototype for the drand48() function. Otherwise, it is
432 up to the program to supply one.
435 This variable conditionally defines HAS_DUP2 if dup2() is
436 available to duplicate file descriptors.
438 d_eaccess (d_eaccess.U):
439 This variable conditionally defines the HAS_EACCESS symbol, which
440 indicates to the C program that the eaccess() routine is available.
442 d_endgrent (d_endgrent.U):
443 This variable conditionally defines the HAS_ENDGRENT symbol, which
444 indicates to the C program that the endgrent() routine is available
445 for sequential access of the group database.
447 d_endhent (d_endhent.U):
448 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
449 available to close whatever was being used for host queries.
451 d_endnent (d_endnent.U):
452 This variable conditionally defines HAS_ENDNETENT if endnetent() is
453 available to close whatever was being used for network queries.
455 d_endpent (d_endpent.U):
456 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
457 available to close whatever was being used for protocol queries.
459 d_endpwent (d_endpwent.U):
460 This variable conditionally defines the HAS_ENDPWENT symbol, which
461 indicates to the C program that the endpwent() routine is available
462 for sequential access of the passwd database.
464 d_endsent (d_endsent.U):
465 This variable conditionally defines HAS_ENDSERVENT if endservent() is
466 available to close whatever was being used for service queries.
468 d_endspent (d_endspent.U):
469 This variable conditionally defines HAS_ENDSPENT if endspent() is
470 available to finalize the scan of SysV shadow password entries.
472 d_eofnblk (nblock_io.U):
473 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
474 when reading from a non-blocking I/O source.
477 This variable conditionally defines the symbols EUNICE and VAX, which
478 alerts the C program that it must deal with ideosyncracies of VMS.
480 d_fchmod (d_fchmod.U):
481 This variable conditionally defines the HAS_FCHMOD symbol, which
482 indicates to the C program that the fchmod() routine is available
483 to change mode of opened files.
485 d_fchown (d_fchown.U):
486 This variable conditionally defines the HAS_FCHOWN symbol, which
487 indicates to the C program that the fchown() routine is available
488 to change ownership of opened files.
491 This variable conditionally defines the HAS_FCNTL symbol, and indicates
492 whether the fcntl() function exists
494 d_fd_macros (d_fd_set.U):
495 This variable contains the eventual value of the HAS_FD_MACROS symbol,
496 which indicates if your C compiler knows about the macros which
497 manipulate an fd_set.
499 d_fd_set (d_fd_set.U):
500 This variable contains the eventual value of the HAS_FD_SET symbol,
501 which indicates if your C compiler knows about the fd_set typedef.
503 d_fds_bits (d_fd_set.U):
504 This variable contains the eventual value of the HAS_FDS_BITS symbol,
505 which indicates if your fd_set typedef contains the fds_bits member.
506 If you have an fd_set typedef, but the dweebs who installed it did
507 a half-fast job and neglected to provide the macros to manipulate
508 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
510 d_fgetpos (d_fgetpos.U):
511 This variable conditionally defines HAS_FGETPOS if fgetpos() is
512 available to get the file position indicator.
514 d_flexfnam (d_flexfnam.U):
515 This variable conditionally defines the FLEXFILENAMES symbol, which
516 indicates that the system supports filenames longer than 14 characters.
519 This variable conditionally defines HAS_FLOCK if flock() is
520 available to do file locking.
523 This variable conditionally defines the HAS_FORK symbol, which
524 indicates to the C program that the fork() routine is available.
526 d_fpathconf (d_pathconf.U):
527 This variable conditionally defines the HAS_FPATHCONF symbol, which
528 indicates to the C program that the pathconf() routine is available
529 to determine file-system related limits and options associated
530 with a given open file descriptor.
533 This symbol will be defined if the C compiler supports fpos64_t.
535 d_fseeko (d_fseeko.U):
536 This variable conditionally defines the HAS_FSEEKO symbol, which
537 indicates to the C program that the fseeko() routine is available.
539 d_fsetpos (d_fsetpos.U):
540 This variable conditionally defines HAS_FSETPOS if fsetpos() is
541 available to set the file position indicator.
543 d_fstatfs (d_statfs.U):
544 This variable conditionally defines the HAS_FSTATFS symbol, which
545 indicates to the C program that the fstatfs() routine is available.
547 d_fstatvfs (d_statvfs.U):
548 This variable conditionally defines the HAS_FSTATVFS symbol, which
549 indicates to the C program that the fstatvfs() routine is available.
551 d_ftello (d_ftello.U):
552 This variable conditionally defines the HAS_FTELLO symbol, which
553 indicates to the C program that the ftello() routine is available.
556 This variable conditionally defines the HAS_FTIME symbol, which indicates
557 that the ftime() routine exists. The ftime() routine is basically
558 a sub-second accuracy clock.
560 d_Gconvert (d_gconvert.U):
561 This variable holds what Gconvert is defined as to convert
562 floating point numbers into strings. It could be 'gconvert'
563 or a more complex macro emulating gconvert with gcvt() or sprintf.
565 d_Gconvert='gconvert((x),(n),(t),(b))'
566 d_Gconvert='gcvt((x),(n),(b))'
567 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
569 d_getgrent (d_getgrent.U):
570 This variable conditionally defines the HAS_GETGRENT symbol, which
571 indicates to the C program that the getgrent() routine is available
572 for sequential access of the group database.
574 d_getgrps (d_getgrps.U):
575 This variable conditionally defines the HAS_GETGROUPS symbol, which
576 indicates to the C program that the getgroups() routine is available
577 to get the list of process groups.
579 d_gethbyaddr (d_gethbyad.U):
580 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
581 indicates to the C program that the gethostbyaddr() routine is available
582 to look up hosts by their IP addresses.
584 d_gethbyname (d_gethbynm.U):
585 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
586 indicates to the C program that the gethostbyname() routine is available
587 to look up host names in some data base or other.
589 d_gethent (d_gethent.U):
590 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
591 available to look up host names in some data base or another.
593 d_gethname (d_gethname.U):
594 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
595 indicates to the C program that the gethostname() routine may be
596 used to derive the host name.
598 d_gethostprotos (d_gethostprotos.U):
599 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
600 which indicates to the C program that <netdb.h> supplies
601 prototypes for the various gethost*() functions.
602 See also netdbtype.U for probing for various netdb types.
604 d_getlogin (d_getlogin.U):
605 This variable conditionally defines the HAS_GETLOGIN symbol, which
606 indicates to the C program that the getlogin() routine is available
607 to get the login name.
609 d_getmntent (d_getmntent.U):
610 This variable conditionally defines the HAS_GETMNTENT symbol, which
611 indicates to the C program that the getmntent() routine is available
612 to iterate through mounted files.
614 d_getnbyaddr (d_getnbyad.U):
615 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
616 indicates to the C program that the getnetbyaddr() routine is available
617 to look up networks by their IP addresses.
619 d_getnbyname (d_getnbynm.U):
620 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
621 indicates to the C program that the getnetbyname() routine is available
622 to look up networks by their names.
624 d_getnent (d_getnent.U):
625 This variable conditionally defines HAS_GETNETENT if getnetent() is
626 available to look up network names in some data base or another.
628 d_getnetprotos (d_getnetprotos.U):
629 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
630 which indicates to the C program that <netdb.h> supplies
631 prototypes for the various getnet*() functions.
632 See also netdbtype.U for probing for various netdb types.
634 d_getpbyname (d_getprotby.U):
635 This variable conditionally defines the HAS_GETPROTOBYNAME
636 symbol, which indicates to the C program that the
637 getprotobyname() routine is available to look up protocols
640 d_getpbynumber (d_getprotby.U):
641 This variable conditionally defines the HAS_GETPROTOBYNUMBER
642 symbol, which indicates to the C program that the
643 getprotobynumber() routine is available to look up protocols
646 d_getpent (d_getpent.U):
647 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
648 available to look up protocols in some data base or another.
650 d_getpgid (d_getpgid.U):
651 This variable conditionally defines the HAS_GETPGID symbol, which
652 indicates to the C program that the getpgid(pid) function
653 is available to get the process group id.
655 d_getpgrp2 (d_getpgrp2.U):
656 This variable conditionally defines the HAS_GETPGRP2 symbol, which
657 indicates to the C program that the getpgrp2() (as in DG/UX) routine
658 is available to get the current process group.
660 d_getpgrp (d_getpgrp.U):
661 This variable conditionally defines HAS_GETPGRP if getpgrp() is
662 available to get the current process group.
664 d_getppid (d_getppid.U):
665 This variable conditionally defines the HAS_GETPPID symbol, which
666 indicates to the C program that the getppid() routine is available
667 to get the parent process ID.
669 d_getprior (d_getprior.U):
670 This variable conditionally defines HAS_GETPRIORITY if getpriority()
671 is available to get a process's priority.
673 d_getprotoprotos (d_getprotoprotos.U):
674 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
675 which indicates to the C program that <netdb.h> supplies
676 prototypes for the various getproto*() functions.
677 See also netdbtype.U for probing for various netdb types.
679 d_getpwent (d_getpwent.U):
680 This variable conditionally defines the HAS_GETPWENT symbol, which
681 indicates to the C program that the getpwent() routine is available
682 for sequential access of the passwd database.
684 d_getsbyname (d_getsrvby.U):
685 This variable conditionally defines the HAS_GETSERVBYNAME
686 symbol, which indicates to the C program that the
687 getservbyname() routine is available to look up services
690 d_getsbyport (d_getsrvby.U):
691 This variable conditionally defines the HAS_GETSERVBYPORT
692 symbol, which indicates to the C program that the
693 getservbyport() routine is available to look up services
696 d_getsent (d_getsent.U):
697 This variable conditionally defines HAS_GETSERVENT if getservent() is
698 available to look up network services in some data base or another.
700 d_getservprotos (d_getservprotos.U):
701 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
702 which indicates to the C program that <netdb.h> supplies
703 prototypes for the various getserv*() functions.
704 See also netdbtype.U for probing for various netdb types.
706 d_getspent (d_getspent.U):
707 This variable conditionally defines HAS_GETSPENT if getspent() is
708 available to retrieve SysV shadow password entries sequentially.
710 d_getspnam (d_getspnam.U):
711 This variable conditionally defines HAS_GETSPNAM if getspnam() is
712 available to retrieve SysV shadow password entries by name.
714 d_gettimeod (d_ftime.U):
715 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
716 indicates that the gettimeofday() system call exists (to obtain a
717 sub-second accuracy clock). You should probably include <sys/resource.h>.
719 d_gnulibc (d_gnulibc.U):
720 Defined if we're dealing with the GNU C Library.
722 d_grpasswd (i_grp.U):
723 This variable conditionally defines GRPASSWD, which indicates
724 that struct group in <grp.h> contains gr_passwd.
726 d_hasmntopt (d_hasmntopt.U):
727 This variable conditionally defines the HAS_HASMNTOPT symbol, which
728 indicates to the C program that the hasmntopt() routine is available
729 to query the mount options of file systems.
732 This variable conditionally defines HAS_HTONL if htonl() and its
733 friends are available to do network order byte swapping.
735 d_index (d_strchr.U):
736 This variable conditionally defines HAS_INDEX if index() and
737 rindex() are available for string searching.
739 d_inetaton (d_inetaton.U):
740 This variable conditionally defines the HAS_INET_ATON symbol, which
741 indicates to the C program that the inet_aton() function is available
742 to parse IP address "dotted-quad" strings.
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).
765 d_ldbl_dig (d_ldbl_dig.U):
766 This variable conditionally defines d_ldbl_dig if this system's
767 header files provide LDBL_DIG, which is the number of significant
768 digits in a long double precision number.
771 This variable conditionally defines HAS_LINK if link() is
772 available to create hard links.
775 This variable conditionally defines the HAS_LLSEEK symbol, which
776 indicates to the C program that the llseek() routine is available.
778 d_locconv (d_locconv.U):
779 This variable conditionally defines HAS_LOCALECONV if localeconv() is
780 available for numeric and monetary formatting conventions.
783 This variable conditionally defines HAS_LOCKF if lockf() is
784 available to do file locking.
786 d_longdbl (d_longdbl.U):
787 This variable conditionally defines HAS_LONG_DOUBLE if
788 the long double type is supported.
790 d_longlong (d_longlong.U):
791 This variable conditionally defines HAS_LONG_LONG if
792 the long long type is supported.
795 This variable conditionally defines HAS_LSTAT if lstat() is
796 available to do file stats on symbolic links.
798 d_madvise (d_madvise.U):
799 This variable conditionally defines HAS_MADVISE if madvise() is
800 available to map a file into memory.
803 This variable conditionally defines the HAS_MBLEN symbol, which
804 indicates to the C program that the mblen() routine is available
805 to find the number of bytes in a multibye character.
807 d_mbstowcs (d_mbstowcs.U):
808 This variable conditionally defines the HAS_MBSTOWCS symbol, which
809 indicates to the C program that the mbstowcs() routine is available
810 to convert a multibyte string into a wide character string.
812 d_mbtowc (d_mbtowc.U):
813 This variable conditionally defines the HAS_MBTOWC symbol, which
814 indicates to the C program that the mbtowc() routine is available
815 to convert multibyte to a wide character.
817 d_memchr (d_memchr.U):
818 This variable conditionally defines the HAS_MEMCHR symbol, which
819 indicates to the C program that the memchr() routine is available
820 to locate characters within a C string.
822 d_memcmp (d_memcmp.U):
823 This variable conditionally defines the HAS_MEMCMP symbol, which
824 indicates to the C program that the memcmp() routine is available
825 to compare blocks of memory.
827 d_memcpy (d_memcpy.U):
828 This variable conditionally defines the HAS_MEMCPY symbol, which
829 indicates to the C program that the memcpy() routine is available
830 to copy blocks of memory.
832 d_memmove (d_memmove.U):
833 This variable conditionally defines the HAS_MEMMOVE symbol, which
834 indicates to the C program that the memmove() routine is available
835 to copy potentatially overlapping blocks of memory.
837 d_memset (d_memset.U):
838 This variable conditionally defines the HAS_MEMSET symbol, which
839 indicates to the C program that the memset() routine is available
840 to set blocks of memory.
843 This variable conditionally defines the HAS_MKDIR symbol, which
844 indicates to the C program that the mkdir() routine is available
845 to create directories..
847 d_mkfifo (d_mkfifo.U):
848 This variable conditionally defines the HAS_MKFIFO symbol, which
849 indicates to the C program that the mkfifo() routine is available.
851 d_mktime (d_mktime.U):
852 This variable conditionally defines the HAS_MKTIME symbol, which
853 indicates to the C program that the mktime() routine is available.
856 This variable conditionally defines HAS_MMAP if mmap() is
857 available to map a file into memory.
859 d_mprotect (d_mprotect.U):
860 This variable conditionally defines HAS_MPROTECT if mprotect() is
861 available to modify the access protection of a memory mapped file.
864 This variable conditionally defines the HAS_MSG symbol, which
865 indicates that the entire msg*(2) library is present.
867 d_msg_ctrunc (d_socket.U):
868 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
869 which indicates that the MSG_CTRUNC is available. #ifdef is
870 not enough because it may be an enum, glibc has been known to do this.
872 d_msg_dontroute (d_socket.U):
873 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
874 which indicates that the MSG_DONTROUTE is available. #ifdef is
875 not enough because it may be an enum, glibc has been known to do this.
877 d_msg_oob (d_socket.U):
878 This variable conditionally defines the HAS_MSG_OOB symbol,
879 which indicates that the MSG_OOB is available. #ifdef is
880 not enough because it may be an enum, glibc has been known to do this.
882 d_msg_peek (d_socket.U):
883 This variable conditionally defines the HAS_MSG_PEEK symbol,
884 which indicates that the MSG_PEEK is available. #ifdef is
885 not enough because it may be an enum, glibc has been known to do this.
887 d_msg_proxy (d_socket.U):
888 This variable conditionally defines the HAS_MSG_PROXY symbol,
889 which indicates that the MSG_PROXY is available. #ifdef is
890 not enough because it may be an enum, glibc has been known to do this.
892 d_msgctl (d_msgctl.U):
893 This variable conditionally defines the HAS_MSGCTL symbol, which
894 indicates to the C program that the msgctl() routine is available.
896 d_msgget (d_msgget.U):
897 This variable conditionally defines the HAS_MSGGET symbol, which
898 indicates to the C program that the msgget() routine is available.
900 d_msghdr_s (d_socket.U):
901 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
902 which indicates that the struct msghdr is supported.
904 d_msgrcv (d_msgrcv.U):
905 This variable conditionally defines the HAS_MSGRCV symbol, which
906 indicates to the C program that the msgrcv() routine is available.
908 d_msgsnd (d_msgsnd.U):
909 This variable conditionally defines the HAS_MSGSND symbol, which
910 indicates to the C program that the msgsnd() routine is available.
913 This variable conditionally defines HAS_MSYNC if msync() is
914 available to synchronize a mapped file.
916 d_munmap (d_munmap.U):
917 This variable conditionally defines HAS_MUNMAP if munmap() is
918 available to unmap a region mapped by mmap().
920 d_mymalloc (mallocsrc.U):
921 This variable conditionally defines MYMALLOC in case other parts
922 of the source want to take special action if MYMALLOC is used.
923 This may include different sorts of profiling or error detection.
926 This variable conditionally defines the HAS_NICE symbol, which
927 indicates to the C program that the nice() routine is available.
930 This symbol will be defined if the C compiler supports off64_t.
932 d_old_pthread_create_joinable (d_pthrattrj.U):
933 This variable conditionally defines pthread_create_joinable.
934 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
936 d_oldpthreads (usethreads.U):
937 This variable conditionally defines the OLD_PTHREADS_API symbol,
938 and indicates that Perl should be built to use the old
939 draft POSIX threads API. This is only potentially meaningful if
942 d_oldsock (d_socket.U):
943 This variable conditionally defines the OLDSOCKET symbol, which
944 indicates that the BSD socket interface is based on 4.1c and not 4.2.
947 This variable conditionally defines the HAS_OPEN3 manifest constant,
948 which indicates to the C program that the 3 argument version of
949 the open(2) function is available.
951 d_pathconf (d_pathconf.U):
952 This variable conditionally defines the HAS_PATHCONF symbol, which
953 indicates to the C program that the pathconf() routine is available
954 to determine file-system related limits and options associated
955 with a given filename.
958 This variable conditionally defines the HAS_PAUSE symbol, which
959 indicates to the C program that the pause() routine is available
960 to suspend a process until a signal is received.
962 d_phostname (d_gethname.U):
963 This variable conditionally defines the HAS_PHOSTNAME symbol, which
964 contains the shell command which, when fed to popen(), may be
965 used to derive the host name.
968 This variable conditionally defines the HAS_PIPE symbol, which
969 indicates to the C program that the pipe() routine is available
970 to create an inter-process channel.
973 This variable conditionally defines the HAS_POLL symbol, which
974 indicates to the C program that the poll() routine is available
975 to poll active file descriptors.
977 d_portable (d_portable.U):
978 This variable conditionally defines the PORTABLE symbol, which
979 indicates to the C program that it should not assume that it is
980 running on the machine it was compiled on.
982 d_PRId64 (quadfio.U):
983 This variable conditionally defines the PERL_PRId64 symbol, which
984 indiciates that stdio has a symbol to print 64-bit decimal numbers.
986 d_PRIeldbl (longdblfio.U):
987 This variable conditionally defines the PERL_PRIfldlbl symbol, which
988 indiciates that stdio has a symbol to print long doubles.
990 d_PRIEldbl (longdblfio.U):
991 This variable conditionally defines the PERL_PRIfldlbl symbol, which
992 indiciates that stdio has a symbol to print long doubles.
994 d_PRIfldbl (longdblfio.U):
995 This variable conditionally defines the PERL_PRIfldlbl symbol, which
996 indiciates that stdio has a symbol to print long doubles.
998 d_PRIFldbl (longdblfio.U):
999 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1000 indiciates that stdio has a symbol to print long doubles.
1002 d_PRIgldbl (longdblfio.U):
1003 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1004 indiciates that stdio has a symbol to print long doubles.
1006 d_PRIGldbl (longdblfio.U):
1007 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1008 indiciates that stdio has a symbol to print long doubles.
1010 d_PRIi64 (quadfio.U):
1011 This variable conditionally defines the PERL_PRIi64 symbol, which
1012 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1014 d_PRIo64 (quadfio.U):
1015 This variable conditionally defines the PERL_PRIo64 symbol, which
1016 indiciates that stdio has a symbol to print 64-bit octal numbers.
1018 d_PRIu64 (quadfio.U):
1019 This variable conditionally defines the PERL_PRIu64 symbol, which
1020 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1023 d_PRIx64 (quadfio.U):
1024 This variable conditionally defines the PERL_PRIx64 symbol, which
1025 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1027 d_PRIX64 (quadfio.U):
1028 This variable conditionally defines the PERL_PRIX64 symbol, which
1029 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1031 d_pthread_yield (d_pthread_y.U):
1032 This variable conditionally defines the HAS_PTHREAD_YIELD
1033 symbol if the pthread_yield routine is available to yield
1034 the execution of the current thread.
1037 This variable conditionally defines PWAGE, which indicates
1038 that struct passwd contains pw_age.
1040 d_pwchange (i_pwd.U):
1041 This variable conditionally defines PWCHANGE, which indicates
1042 that struct passwd contains pw_change.
1044 d_pwclass (i_pwd.U):
1045 This variable conditionally defines PWCLASS, which indicates
1046 that struct passwd contains pw_class.
1048 d_pwcomment (i_pwd.U):
1049 This variable conditionally defines PWCOMMENT, which indicates
1050 that struct passwd contains pw_comment.
1052 d_pwexpire (i_pwd.U):
1053 This variable conditionally defines PWEXPIRE, which indicates
1054 that struct passwd contains pw_expire.
1056 d_pwgecos (i_pwd.U):
1057 This variable conditionally defines PWGECOS, which indicates
1058 that struct passwd contains pw_gecos.
1060 d_pwpasswd (i_pwd.U):
1061 This variable conditionally defines PWPASSWD, which indicates
1062 that struct passwd contains pw_passwd.
1064 d_pwquota (i_pwd.U):
1065 This variable conditionally defines PWQUOTA, which indicates
1066 that struct passwd contains pw_quota.
1068 d_readdir (d_readdir.U):
1069 This variable conditionally defines HAS_READDIR if readdir() is
1070 available to read directory entries.
1072 d_readlink (d_readlink.U):
1073 This variable conditionally defines the HAS_READLINK symbol, which
1074 indicates to the C program that the readlink() routine is available
1075 to read the value of a symbolic link.
1077 d_readv (d_readv.U):
1078 This variable conditionally defines the HAS_READV symbol, which
1079 indicates to the C program that the readv() routine is available.
1081 d_recvmsg (d_socket.U):
1082 This variable conditionally defines the HAS_RECVMSG symbol,
1083 which indicates that the recvmsg is supported.
1085 d_rename (d_rename.U):
1086 This variable conditionally defines the HAS_RENAME symbol, which
1087 indicates to the C program that the rename() routine is available
1090 d_rewinddir (d_readdir.U):
1091 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1094 d_rmdir (d_rmdir.U):
1095 This variable conditionally defines HAS_RMDIR if rmdir() is
1096 available to remove directories.
1098 d_safebcpy (d_safebcpy.U):
1099 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1100 the bcopy() routine can do overlapping copies.
1102 d_safemcpy (d_safemcpy.U):
1103 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1104 the memcpy() routine can do overlapping copies.
1106 d_sanemcmp (d_sanemcmp.U):
1107 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1108 the memcpy() routine is available and can be used to compare relative
1109 magnitudes of chars with their high bits set.
1111 d_sched_yield (d_pthread_y.U):
1112 This variable conditionally defines the HAS_SCHED_YIELD
1113 symbol if the sched_yield routine is available to yield
1114 the execution of the current thread.
1116 d_scm_rights (d_socket.U):
1117 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1118 which indicates that the SCM_RIGHTS is available. #ifdef is
1119 not enough because it may be an enum, glibc has been known to do this.
1121 d_seekdir (d_readdir.U):
1122 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1125 d_select (d_select.U):
1126 This variable conditionally defines HAS_SELECT if select() is
1127 available to select active file descriptors. A <sys/time.h>
1128 inclusion may be necessary for the timeout field.
1131 This variable conditionally defines the HAS_SEM symbol, which
1132 indicates that the entire sem*(2) library is present.
1134 d_semctl (d_semctl.U):
1135 This variable conditionally defines the HAS_SEMCTL symbol, which
1136 indicates to the C program that the semctl() routine is available.
1138 d_semctl_semid_ds (d_union_semun.U):
1139 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1140 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1142 d_semctl_semun (d_union_semun.U):
1143 This variable conditionally defines USE_SEMCTL_SEMUN, which
1144 indicates that union semun is to be used for semctl IPC_STAT.
1146 d_semget (d_semget.U):
1147 This variable conditionally defines the HAS_SEMGET symbol, which
1148 indicates to the C program that the semget() routine is available.
1150 d_semop (d_semop.U):
1151 This variable conditionally defines the HAS_SEMOP symbol, which
1152 indicates to the C program that the semop() routine is available.
1154 d_sendmsg (d_socket.U):
1155 This variable conditionally defines the HAS_SENDMSG symbol,
1156 which indicates that the sendmsg is supported.
1158 d_setegid (d_setegid.U):
1159 This variable conditionally defines the HAS_SETEGID symbol, which
1160 indicates to the C program that the setegid() routine is available
1161 to change the effective gid of the current program.
1163 d_seteuid (d_seteuid.U):
1164 This variable conditionally defines the HAS_SETEUID symbol, which
1165 indicates to the C program that the seteuid() routine is available
1166 to change the effective uid of the current program.
1168 d_setgrent (d_setgrent.U):
1169 This variable conditionally defines the HAS_SETGRENT symbol, which
1170 indicates to the C program that the setgrent() routine is available
1171 for initializing sequential access to the group database.
1173 d_setgrps (d_setgrps.U):
1174 This variable conditionally defines the HAS_SETGROUPS symbol, which
1175 indicates to the C program that the setgroups() routine is available
1176 to set the list of process groups.
1178 d_sethent (d_sethent.U):
1179 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1182 d_setlinebuf (d_setlnbuf.U):
1183 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1184 indicates to the C program that the setlinebuf() routine is available
1185 to change stderr or stdout from block-buffered or unbuffered to a
1188 d_setlocale (d_setlocale.U):
1189 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1190 available to handle locale-specific ctype implementations.
1192 d_setnent (d_setnent.U):
1193 This variable conditionally defines HAS_SETNETENT if setnetent() is
1196 d_setpent (d_setpent.U):
1197 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1200 d_setpgid (d_setpgid.U):
1201 This variable conditionally defines the HAS_SETPGID symbol if the
1202 setpgid(pid, gpid) function is available to set process group ID.
1204 d_setpgrp2 (d_setpgrp2.U):
1205 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1206 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1207 is available to set the current process group.
1209 d_setpgrp (d_setpgrp.U):
1210 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1211 available to set the current process group.
1213 d_setprior (d_setprior.U):
1214 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1215 is available to set a process's priority.
1217 d_setpwent (d_setpwent.U):
1218 This variable conditionally defines the HAS_SETPWENT symbol, which
1219 indicates to the C program that the setpwent() routine is available
1220 for initializing sequential access to the passwd database.
1222 d_setregid (d_setregid.U):
1223 This variable conditionally defines HAS_SETREGID if setregid() is
1224 available to change the real and effective gid of the current
1227 d_setresgid (d_setregid.U):
1228 This variable conditionally defines HAS_SETRESGID if setresgid() is
1229 available to change the real, effective and saved gid of the current
1232 d_setresuid (d_setreuid.U):
1233 This variable conditionally defines HAS_SETREUID if setresuid() is
1234 available to change the real, effective and saved uid of the current
1237 d_setreuid (d_setreuid.U):
1238 This variable conditionally defines HAS_SETREUID if setreuid() is
1239 available to change the real and effective uid of the current
1242 d_setrgid (d_setrgid.U):
1243 This variable conditionally defines the HAS_SETRGID symbol, which
1244 indicates to the C program that the setrgid() routine is available
1245 to change the real gid of the current program.
1247 d_setruid (d_setruid.U):
1248 This variable conditionally defines the HAS_SETRUID symbol, which
1249 indicates to the C program that the setruid() routine is available
1250 to change the real uid of the current program.
1252 d_setsent (d_setsent.U):
1253 This variable conditionally defines HAS_SETSERVENT if setservent() is
1256 d_setsid (d_setsid.U):
1257 This variable conditionally defines HAS_SETSID if setsid() is
1258 available to set the process group ID.
1260 d_setspent (d_setspent.U):
1261 This variable conditionally defines HAS_SETSPENT if setspent() is
1262 available to initialize the scan of SysV shadow password entries.
1264 d_setvbuf (d_setvbuf.U):
1265 This variable conditionally defines the HAS_SETVBUF symbol, which
1266 indicates to the C program that the setvbuf() routine is available
1267 to change buffering on an open stdio stream.
1270 This variable conditionally defines the USE_SFIO symbol,
1271 and indicates whether sfio is available (and should be used).
1274 This variable conditionally defines the HAS_SHM symbol, which
1275 indicates that the entire shm*(2) library is present.
1277 d_shmat (d_shmat.U):
1278 This variable conditionally defines the HAS_SHMAT symbol, which
1279 indicates to the C program that the shmat() routine is available.
1281 d_shmatprototype (d_shmat.U):
1282 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1283 symbol, which indicates that sys/shm.h has a prototype for
1286 d_shmctl (d_shmctl.U):
1287 This variable conditionally defines the HAS_SHMCTL symbol, which
1288 indicates to the C program that the shmctl() routine is available.
1290 d_shmdt (d_shmdt.U):
1291 This variable conditionally defines the HAS_SHMDT symbol, which
1292 indicates to the C program that the shmdt() routine is available.
1294 d_shmget (d_shmget.U):
1295 This variable conditionally defines the HAS_SHMGET symbol, which
1296 indicates to the C program that the shmget() routine is available.
1298 d_sigaction (d_sigaction.U):
1299 This variable conditionally defines the HAS_SIGACTION symbol, which
1300 indicates that the Vr4 sigaction() routine is available.
1302 d_sigsetjmp (d_sigsetjmp.U):
1303 This variable conditionally defines the HAS_SIGSETJMP symbol,
1304 which indicates that the sigsetjmp() routine is available to
1305 call setjmp() and optionally save the process's signal mask.
1307 d_socket (d_socket.U):
1308 This variable conditionally defines HAS_SOCKET, which indicates
1309 that the BSD socket interface is supported.
1311 d_sockpair (d_socket.U):
1312 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1313 indicates that the BSD socketpair() is supported.
1315 d_statblks (d_statblks.U):
1316 This variable conditionally defines USE_STAT_BLOCKS
1317 if this system has a stat structure declaring
1318 st_blksize and st_blocks.
1320 d_statfs (d_statfs.U):
1321 This variable conditionally defines the HAS_STATFS symbol, which
1322 indicates to the C program that the statfs() routine is available.
1324 d_statfsflags (d_statfs.U):
1325 This variable conditionally defines the HAS_STRUCT_STATFS_FLAGS
1326 symbol, which indicates to struct statfs from has f_flags member.
1327 This kind of struct statfs is coming from sys/mount.h (BSD),
1328 not from sys/statfs.h (SYSV).
1330 d_statvfs (d_statvfs.U):
1331 This variable conditionally defines the HAS_STATVFS symbol, which
1332 indicates to the C program that the statvfs() routine is available.
1334 d_stdio_cnt_lval (d_stdstdio.U):
1335 This variable conditionally defines STDIO_CNT_LVALUE if the
1336 FILE_cnt macro can be used as an lvalue.
1338 d_stdio_ptr_lval (d_stdstdio.U):
1339 This variable conditionally defines STDIO_PTR_LVALUE if the
1340 FILE_ptr macro can be used as an lvalue.
1342 d_stdio_stream_array (stdio_streams.U):
1343 This variable tells whether there is an array holding
1346 d_stdiobase (d_stdstdio.U):
1347 This variable conditionally defines USE_STDIO_BASE if this system
1348 has a FILE structure declaring a usable _base field (or equivalent)
1351 d_stdstdio (d_stdstdio.U):
1352 This variable conditionally defines USE_STDIO_PTR if this system
1353 has a FILE structure declaring usable _ptr and _cnt fields (or
1354 equivalent) in stdio.h.
1356 d_strchr (d_strchr.U):
1357 This variable conditionally defines HAS_STRCHR if strchr() and
1358 strrchr() are available for string searching.
1360 d_strcoll (d_strcoll.U):
1361 This variable conditionally defines HAS_STRCOLL if strcoll() is
1362 available to compare strings using collating information.
1364 d_strctcpy (d_strctcpy.U):
1365 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1366 indicates to the C program that this C compiler knows how to copy
1369 d_strerrm (d_strerror.U):
1370 This variable holds what Strerrr is defined as to translate an error
1371 code condition into an error message string. It could be 'strerror'
1372 or a more complex macro emulating strrror with sys_errlist[], or the
1373 "unknown" string when both strerror and sys_errlist are missing.
1375 d_strerror (d_strerror.U):
1376 This variable conditionally defines HAS_STRERROR if strerror() is
1377 available to translate error numbers to strings.
1379 d_strtod (d_strtod.U):
1380 This variable conditionally defines the HAS_STRTOD symbol, which
1381 indicates to the C program that the strtod() routine is available
1382 to provide better numeric string conversion than atof().
1384 d_strtol (d_strtol.U):
1385 This variable conditionally defines the HAS_STRTOL symbol, which
1386 indicates to the C program that the strtol() routine is available
1387 to provide better numeric string conversion than atoi() and friends.
1389 d_strtoul (d_strtoul.U):
1390 This variable conditionally defines the HAS_STRTOUL symbol, which
1391 indicates to the C program that the strtoul() routine is available
1392 to provide conversion of strings to unsigned long.
1394 d_strtoull (strtoull.U):
1395 This variable conditionally defines the HAS_STRTOULL symbol, which
1396 indicates to the C program that the strtoull() routine is available.
1398 d_strxfrm (d_strxfrm.U):
1399 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1400 available to transform strings.
1402 d_suidsafe (d_dosuid.U):
1403 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1404 if setuid scripts can be secure. This test looks in /dev/fd/.
1406 d_symlink (d_symlink.U):
1407 This variable conditionally defines the HAS_SYMLINK symbol, which
1408 indicates to the C program that the symlink() routine is available
1409 to create symbolic links.
1411 d_syscall (d_syscall.U):
1412 This variable conditionally defines HAS_SYSCALL if syscall() is
1413 available call arbitrary system calls.
1415 d_sysconf (d_sysconf.U):
1416 This variable conditionally defines the HAS_SYSCONF symbol, which
1417 indicates to the C program that the sysconf() routine is available
1418 to determine system related limits and options.
1420 d_sysernlst (d_strerror.U):
1421 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1422 is available to translate error numbers to the symbolic name.
1424 d_syserrlst (d_strerror.U):
1425 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1426 available to translate error numbers to strings.
1428 d_system (d_system.U):
1429 This variable conditionally defines HAS_SYSTEM if system() is
1430 available to issue a shell command.
1432 d_tcgetpgrp (d_tcgtpgrp.U):
1433 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1434 indicates to the C program that the tcgetpgrp() routine is available.
1435 to get foreground process group ID.
1437 d_tcsetpgrp (d_tcstpgrp.U):
1438 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1439 indicates to the C program that the tcsetpgrp() routine is available
1440 to set foreground process group ID.
1442 d_telldir (d_readdir.U):
1443 This variable conditionally defines HAS_TELLDIR if telldir() is
1446 d_telldirproto (d_telldirproto.U):
1447 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1448 which indicates to the C program that the system provides
1449 a prototype for the telldir() function. Otherwise, it is
1450 up to the program to supply one.
1453 This variable conditionally defines the HAS_TIME symbol, which indicates
1454 that the time() routine exists. The time() routine is normaly
1455 provided on UNIX systems.
1457 d_times (d_times.U):
1458 This variable conditionally defines the HAS_TIMES symbol, which indicates
1459 that the times() routine exists. The times() routine is normaly
1460 provided on UNIX systems. You may have to include <sys/times.h>.
1462 d_truncate (d_truncate.U):
1463 This variable conditionally defines HAS_TRUNCATE if truncate() is
1464 available to truncate files.
1466 d_tzname (d_tzname.U):
1467 This variable conditionally defines HAS_TZNAME if tzname[] is
1468 available to access timezone names.
1470 d_umask (d_umask.U):
1471 This variable conditionally defines the HAS_UMASK symbol, which
1472 indicates to the C program that the umask() routine is available.
1473 to set and get the value of the file creation mask.
1475 d_uname (d_gethname.U):
1476 This variable conditionally defines the HAS_UNAME symbol, which
1477 indicates to the C program that the uname() routine may be
1478 used to derive the host name.
1480 d_union_semun (d_union_semun.U):
1481 This variable conditionally defines HAS_UNION_SEMUN if the
1482 union semun is defined by including <sys/sem.h>.
1484 d_vendorlib (vendorlib.U):
1485 This variable conditionally defines PERL_VENDORLIB.
1487 d_vfork (d_vfork.U):
1488 This variable conditionally defines the HAS_VFORK symbol, which
1489 indicates the vfork() routine is available.
1491 d_void_closedir (d_closedir.U):
1492 This variable conditionally defines VOID_CLOSEDIR if closedir()
1493 does not return a value.
1495 d_voidsig (d_voidsig.U):
1496 This variable conditionally defines VOIDSIG if this system
1497 declares "void (*signal(...))()" in signal.h. The old way was to
1498 declare it as "int (*signal(...))()".
1500 d_voidtty (i_sysioctl.U):
1501 This variable conditionally defines USE_IOCNOTTY to indicate that the
1502 ioctl() call with TIOCNOTTY should be used to void tty association.
1503 Otherwise (on USG probably), it is enough to close the standard file
1504 decriptors and do a setpgrp().
1506 d_volatile (d_volatile.U):
1507 This variable conditionally defines the HASVOLATILE symbol, which
1508 indicates to the C program that this C compiler knows about the
1509 volatile declaration.
1511 d_vprintf (d_vprintf.U):
1512 This variable conditionally defines the HAS_VPRINTF symbol, which
1513 indicates to the C program that the vprintf() routine is available
1514 to printf with a pointer to an argument list.
1516 d_wait4 (d_wait4.U):
1517 This variable conditionally defines the HAS_WAIT4 symbol, which
1518 indicates the wait4() routine is available.
1520 d_waitpid (d_waitpid.U):
1521 This variable conditionally defines HAS_WAITPID if waitpid() is
1522 available to wait for child process.
1524 d_wcstombs (d_wcstombs.U):
1525 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1526 indicates to the C program that the wcstombs() routine is available
1527 to convert wide character strings to multibyte strings.
1529 d_wctomb (d_wctomb.U):
1530 This variable conditionally defines the HAS_WCTOMB symbol, which
1531 indicates to the C program that the wctomb() routine is available
1532 to convert a wide character to a multibyte.
1534 d_writev (d_writev.U):
1535 This variable conditionally defines the HAS_WRITEV symbol, which
1536 indicates to the C program that the writev() routine is available.
1539 This variable conditionally defines the symbol XENIX, which alerts
1540 the C program that it runs under Xenix.
1543 This variable is be used internally by Configure to determine the
1544 full pathname (if any) of the date program. After Configure runs,
1545 the value is reset to a plain "date" and is not useful.
1547 db_hashtype (i_db.U):
1548 This variable contains the type of the hash structure element
1549 in the <db.h> header file. In older versions of DB, it was
1550 int, while in newer ones it is u_int32_t.
1552 db_prefixtype (i_db.U):
1553 This variable contains the type of the prefix structure element
1554 in the <db.h> header file. In older versions of DB, it was
1555 int, while in newer ones it is size_t.
1557 defvoidused (voidflags.U):
1558 This variable contains the default value of the VOIDUSED symbol (15).
1560 direntrytype (i_dirent.U):
1561 This symbol is set to 'struct direct' or 'struct dirent' depending on
1562 whether dirent is available or not. You should use this pseudo type to
1563 portably declare your directory entries.
1566 This variable contains the extension that is to be used for the
1567 dynamically loaded modules that perl generaties.
1570 This variable contains the name of the dynamic loading file that
1571 will be used with the package.
1573 doublesize (doublesize.U):
1574 This variable contains the value of the DOUBLESIZE symbol, which
1575 indicates to the C program how many bytes there are in a double.
1577 drand01 (randfunc.U):
1578 Indicates the macro to be used to generate normalized
1579 random numbers. Uses randfunc, often divided by
1580 (double) (((unsigned long) 1 << randbits)) in order to
1581 normalize the result.
1582 In C programs, the macro 'Drand01' is mapped to drand01.
1584 dynamic_ext (Extensions.U):
1585 This variable holds a list of XS extension files we want to
1586 link dynamically into the package. It is used by Makefile.
1588 eagain (nblock_io.U):
1589 This variable bears the symbolic errno code set by read() when no
1590 data is present on the file and non-blocking I/O was enabled (otherwise,
1591 read() blocks naturally).
1594 This variable conditionally defines EBCDIC if this
1595 system uses EBCDIC encoding. Among other things, this
1596 means that the character ranges are not contiguous.
1600 This variable is be used internally by Configure to determine the
1601 full pathname (if any) of the echo program. After Configure runs,
1602 the value is reset to a plain "echo" and is not useful.
1605 This variable is be used internally by Configure to determine the
1606 full pathname (if any) of the egrep program. After Configure runs,
1607 the value is reset to a plain "egrep" and is not useful.
1610 This variable is defined but not used by Configure.
1611 The value is a plain '' and is not useful.
1614 When running under Eunice this variable contains a command which will
1615 convert a shell script to the proper form of text file for it to be
1616 executable by the shell. On other systems it is a no-op.
1619 This is an old synonym for _exe.
1622 This variable is be used internally by Configure to determine the
1623 full pathname (if any) of the expr program. After Configure runs,
1624 the value is reset to a plain "expr" and is not useful.
1626 extensions (Extensions.U):
1627 This variable holds a list of all extension files (both XS and
1628 non-xs linked into the package. It is propagated to Config.pm
1629 and is typically used to test whether a particular extesion
1632 fflushall (fflushall.U):
1633 This symbol, if defined, tells that to flush
1634 all pending stdio output one must loop through all
1635 the stdio file handles stored in an array and fflush them.
1636 Note that if fflushNULL is defined, fflushall will not
1637 even be probed for and will be left undefined.
1639 fflushNULL (fflushall.U):
1640 This symbol, if defined, tells that fflush(NULL) does flush
1641 all pending stdio output.
1644 This variable is defined but not used by Configure.
1645 The value is a plain '' and is not useful.
1647 firstmakefile (Unix.U):
1648 This variable defines the first file searched by make. On unix,
1649 it is makefile (then Makefile). On case-insensitive systems,
1650 it might be something else. This is only used to deal with
1651 convoluted make depend tricks.
1654 This variable is defined but not used by Configure.
1655 The value is a plain '' and is not useful.
1657 fpostype (fpostype.U):
1658 This variable defines Fpos_t to be something like fpost_t, long,
1659 uint, or whatever type is used to declare file positions in libc.
1661 freetype (mallocsrc.U):
1662 This variable contains the return type of free(). It is usually
1663 void, but occasionally int.
1666 This variable contains the full pathname to 'ar', whether or
1667 not the user has specified 'portability'. This is only used
1671 This variable contains the full pathname to 'csh', whether or
1672 not the user has specified 'portability'. This is only used
1673 in the compiled C program, and we assume that all systems which
1674 can share this executable will have the same full pathname to
1677 full_sed (Loc_sed.U):
1678 This variable contains the full pathname to 'sed', whether or
1679 not the user has specified 'portability'. This is only used
1680 in the compiled C program, and we assume that all systems which
1681 can share this executable will have the same full pathname to
1685 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1686 indicate whether the compiler is version 1 or 2. This is used in
1687 setting some of the default cflags. It is set to '' if not gcc.
1689 gidtype (gidtype.U):
1690 This variable defines Gid_t to be something like gid_t, int,
1691 ushort, or whatever type is used to declare the return type
1692 of getgid(). Typically, it is the type of group ids in the kernel.
1695 This variable holds the general path (space-separated) used to
1696 find libraries. It may contain directories that do not exist on
1697 this platform, libpth is the cleaned-up version.
1700 This variable is be used internally by Configure to determine the
1701 full pathname (if any) of the grep program. After Configure runs,
1702 the value is reset to a plain "grep" and is not useful.
1705 This variable contains a command that produces the text of the
1706 /etc/group file. This is normally "cat /etc/group", but can be
1707 "ypcat group" when NIS is used.
1709 groupstype (groupstype.U):
1710 This variable defines Groups_t to be something like gid_t, int,
1711 ushort, or whatever type is used for the second argument to
1712 getgroups() and setgroups(). Usually, this is the same as
1713 gidtype (gid_t), but sometimes it isn't.
1716 This variable is be used internally by Configure to determine the
1717 full pathname (if any) of the gzip program. After Configure runs,
1718 the value is reset to a plain "gzip" and is not useful.
1720 h_fcntl (h_fcntl.U):
1721 This is variable gets set in various places to tell i_fcntl that
1722 <fcntl.h> should be included.
1724 h_sysfile (h_sysfile.U):
1725 This is variable gets set in various places to tell i_sys_file that
1726 <sys/file.h> should be included.
1729 Gives the type of hints used for previous answers. May be one of
1730 "default", "recommended" or "previous".
1733 This variable contains a command that produces the text of the
1734 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1735 "ypcat hosts" when NIS is used.
1738 This variable contains a flag which will tell the C compiler and loader
1739 to produce a program running with a huge memory model. If the
1740 huge model is not supported, contains the flag to produce large
1741 model programs. It is up to the Makefile to use this.
1743 i_arpainet (i_arpainet.U):
1744 This variable conditionally defines the I_ARPA_INET symbol,
1745 and indicates whether a C program should include <arpa/inet.h>.
1747 i_bsdioctl (i_sysioctl.U):
1748 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1749 indicates to the C program that <sys/bsdioctl.h> exists and should
1753 This variable conditionally defines the I_DB symbol, and indicates
1754 whether a C program may include Berkeley's DB include file <db.h>.
1757 This variable conditionally defines the I_DBM symbol, which
1758 indicates to the C program that <dbm.h> exists and should
1761 i_dirent (i_dirent.U):
1762 This variable conditionally defines I_DIRENT, which indicates
1763 to the C program that it should include <dirent.h>.
1766 This variable conditionally defines the I_DLD symbol, which
1767 indicates to the C program that <dld.h> (GNU dynamic loading)
1768 exists and should be included.
1770 i_dlfcn (i_dlfcn.U):
1771 This variable conditionally defines the I_DLFCN symbol, which
1772 indicates to the C program that <dlfcn.h> exists and should
1775 i_fcntl (i_fcntl.U):
1776 This variable controls the value of I_FCNTL (which tells
1777 the C program to include <fcntl.h>).
1779 i_float (i_float.U):
1780 This variable conditionally defines the I_FLOAT symbol, and indicates
1781 whether a C program may include <float.h> to get symbols like DBL_MAX
1782 or DBL_MIN, i.e. machine dependent floating point values.
1785 This variable conditionally defines the I_GDBM symbol, which
1786 indicates to the C program that <gdbm.h> exists and should
1790 This variable conditionally defines the I_GRP symbol, and indicates
1791 whether a C program should include <grp.h>.
1793 i_inttypes (i_inttypes.U):
1794 This variable conditionally defines the I_INTTYPES symbol,
1795 and indicates whether a C program should include <inttypes.h>.
1797 i_limits (i_limits.U):
1798 This variable conditionally defines the I_LIMITS symbol, and indicates
1799 whether a C program may include <limits.h> to get symbols like WORD_BIT
1802 i_locale (i_locale.U):
1803 This variable conditionally defines the I_LOCALE symbol,
1804 and indicates whether a C program should include <locale.h>.
1806 i_machcthr (i_machcthr.U):
1807 This variable conditionally defines the I_MACH_CTHREADS symbol,
1808 and indicates whether a C program should include <mach/cthreads.h>.
1810 i_malloc (i_malloc.U):
1811 This variable conditionally defines the I_MALLOC symbol, and indicates
1812 whether a C program should include <malloc.h>.
1815 This variable conditionally defines the I_MATH symbol, and indicates
1816 whether a C program may include <math.h>.
1818 i_memory (i_memory.U):
1819 This variable conditionally defines the I_MEMORY symbol, and indicates
1820 whether a C program should include <memory.h>.
1822 i_mntent (i_mntent.U):
1823 This variable conditionally defines the I_MNTENT symbol, and indicates
1824 whether a C program should include <mntent.h>.
1827 This variable conditionally defines the I_NDBM symbol, which
1828 indicates to the C program that <ndbm.h> exists and should
1831 i_netdb (i_netdb.U):
1832 This variable conditionally defines the I_NETDB symbol, and indicates
1833 whether a C program should include <netdb.h>.
1835 i_neterrno (i_neterrno.U):
1836 This variable conditionally defines the I_NET_ERRNO symbol, which
1837 indicates to the C program that <net/errno.h> exists and should
1840 i_netinettcp (i_netinettcp.U):
1841 This variable conditionally defines the I_NETINET_TCP symbol,
1842 and indicates whether a C program should include <netinet/tcp.h>.
1845 This variable conditionally defines I_NETINET_IN, which indicates
1846 to the C program that it should include <netinet/in.h>. Otherwise,
1847 you may try <sys/in.h>.
1850 This variable conditionally defines the I_POLL symbol, and indicates
1851 whether a C program should include <poll.h>.
1853 i_pthread (i_pthread.U):
1854 This variable conditionally defines the I_PTHREAD symbol,
1855 and indicates whether a C program should include <pthread.h>.
1858 This variable conditionally defines I_PWD, which indicates
1859 to the C program that it should include <pwd.h>.
1861 i_rpcsvcdbm (i_dbm.U):
1862 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1863 indicates to the C program that <rpcsvc/dbm.h> exists and should
1864 be included. Some System V systems might need this instead of <dbm.h>.
1867 This variable conditionally defines the I_SFIO symbol,
1868 and indicates whether a C program should include <sfio.h>.
1870 i_sgtty (i_termio.U):
1871 This variable conditionally defines the I_SGTTY symbol, which
1872 indicates to the C program that it should include <sgtty.h> rather
1875 i_shadow (i_shadow.U):
1876 This variable conditionally defines the I_SHADOW symbol, and indicates
1877 whether a C program should include <shadow.h>.
1879 i_socks (i_socks.U):
1880 This variable conditionally defines the I_SOCKS symbol, and indicates
1881 whether a C program should include <socks.h>.
1883 i_stdarg (i_varhdr.U):
1884 This variable conditionally defines the I_STDARG symbol, which
1885 indicates to the C program that <stdarg.h> exists and should
1888 i_stddef (i_stddef.U):
1889 This variable conditionally defines the I_STDDEF symbol, which
1890 indicates to the C program that <stddef.h> exists and should
1893 i_stdlib (i_stdlib.U):
1894 This variable conditionally defines the I_STDLIB symbol, which
1895 indicates to the C program that <stdlib.h> exists and should
1898 i_string (i_string.U):
1899 This variable conditionally defines the I_STRING symbol, which
1900 indicates that <string.h> should be included rather than <strings.h>.
1902 i_sysaccess (i_sysaccess.U):
1903 This variable conditionally defines the I_SYS_ACCESS symbol,
1904 and indicates whether a C program should include <sys/access.h>.
1906 i_sysdir (i_sysdir.U):
1907 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1908 whether a C program should include <sys/dir.h>.
1910 i_sysfile (i_sysfile.U):
1911 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1912 whether a C program should include <sys/file.h> to get R_OK and friends.
1914 i_sysfilio (i_sysioctl.U):
1915 This variable conditionally defines the I_SYS_FILIO symbol, which
1916 indicates to the C program that <sys/filio.h> exists and should
1917 be included in preference to <sys/ioctl.h>.
1920 This variable conditionally defines I_SYS_IN, which indicates
1921 to the C program that it should include <sys/in.h> instead of
1924 i_sysioctl (i_sysioctl.U):
1925 This variable conditionally defines the I_SYS_IOCTL symbol, which
1926 indicates to the C program that <sys/ioctl.h> exists and should
1929 i_sysmman (i_sysmman.U):
1930 This variable conditionally defines the I_SYS_MMAN symbol, and
1931 indicates whether a C program should include <sys/mman.h>.
1933 i_sysmount (i_sysmount.U):
1934 This variable conditionally defines the I_SYSMOUNT symbol,
1935 and indicates whether a C program should include <sys/mount.h>.
1937 i_sysndir (i_sysndir.U):
1938 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1939 whether a C program should include <sys/ndir.h>.
1941 i_sysparam (i_sysparam.U):
1942 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1943 whether a C program should include <sys/param.h>.
1945 i_sysresrc (i_sysresrc.U):
1946 This variable conditionally defines the I_SYS_RESOURCE symbol,
1947 and indicates whether a C program should include <sys/resource.h>.
1949 i_syssecrt (i_syssecrt.U):
1950 This variable conditionally defines the I_SYS_SECURITY symbol,
1951 and indicates whether a C program should include <sys/security.h>.
1953 i_sysselct (i_sysselct.U):
1954 This variable conditionally defines I_SYS_SELECT, which indicates
1955 to the C program that it should include <sys/select.h> in order to
1956 get the definition of struct timeval.
1958 i_syssockio (i_sysioctl.U):
1959 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1960 C program that socket ioctl codes may be found in <sys/sockio.h>
1961 instead of <sys/ioctl.h>.
1963 i_sysstat (i_sysstat.U):
1964 This variable conditionally defines the I_SYS_STAT symbol,
1965 and indicates whether a C program should include <sys/stat.h>.
1967 i_sysstatvfs (i_sysstatvfs.U):
1968 This variable conditionally defines the I_SYSSTATVFS symbol,
1969 and indicates whether a C program should include <sys/statvfs.h>.
1971 i_systime (i_time.U):
1972 This variable conditionally defines I_SYS_TIME, which indicates
1973 to the C program that it should include <sys/time.h>.
1975 i_systimek (i_time.U):
1976 This variable conditionally defines I_SYS_TIME_KERNEL, which
1977 indicates to the C program that it should include <sys/time.h>
1978 with KERNEL defined.
1980 i_systimes (i_systimes.U):
1981 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1982 whether a C program should include <sys/times.h>.
1984 i_systypes (i_systypes.U):
1985 This variable conditionally defines the I_SYS_TYPES symbol,
1986 and indicates whether a C program should include <sys/types.h>.
1988 i_sysuio (i_sysuio.U):
1989 This variable conditionally defines the I_SYSUIO symbol, and indicates
1990 whether a C program should include <sys/uio.h>.
1992 i_sysun (i_sysun.U):
1993 This variable conditionally defines I_SYS_UN, which indicates
1994 to the C program that it should include <sys/un.h> to get UNIX
1995 domain socket definitions.
1997 i_syswait (i_syswait.U):
1998 This variable conditionally defines I_SYS_WAIT, which indicates
1999 to the C program that it should include <sys/wait.h>.
2001 i_termio (i_termio.U):
2002 This variable conditionally defines the I_TERMIO symbol, which
2003 indicates to the C program that it should include <termio.h> rather
2006 i_termios (i_termio.U):
2007 This variable conditionally defines the I_TERMIOS symbol, which
2008 indicates to the C program that the POSIX <termios.h> file is
2012 This variable conditionally defines I_TIME, which indicates
2013 to the C program that it should include <time.h>.
2015 i_unistd (i_unistd.U):
2016 This variable conditionally defines the I_UNISTD symbol, and indicates
2017 whether a C program should include <unistd.h>.
2019 i_utime (i_utime.U):
2020 This variable conditionally defines the I_UTIME symbol, and indicates
2021 whether a C program should include <utime.h>.
2023 i_values (i_values.U):
2024 This variable conditionally defines the I_VALUES symbol, and indicates
2025 whether a C program may include <values.h> to get symbols like MAXLONG
2028 i_varargs (i_varhdr.U):
2029 This variable conditionally defines I_VARARGS, which indicates
2030 to the C program that it should include <varargs.h>.
2032 i_varhdr (i_varhdr.U):
2033 Contains the name of the header to be included to get va_dcl definition.
2034 Typically one of varargs.h or stdarg.h.
2036 i_vfork (i_vfork.U):
2037 This variable conditionally defines the I_VFORK symbol, and indicates
2038 whether a C program should include vfork.h.
2040 ignore_versioned_solibs (libs.U):
2041 This variable should be non-empty if non-versioned shared
2042 libraries (libfoo.so.x.y) are to be ignored (because they
2043 cannot be linked against).
2046 This variable must preceed the normal include path to get hte
2047 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2048 Value can be "" or "/bsd43" on mips.
2051 This variable is defined but not used by Configure.
2052 The value is a plain '' and is not useful.
2054 installarchlib (archlib.U):
2055 This variable is really the same as archlibexp but may differ on
2056 those systems using AFS. For extra portability, only this variable
2057 should be used in makefiles.
2060 This variable is the same as binexp unless AFS is running in which case
2061 the user is explicitely prompted for it. This variable should always
2062 be used in your makefiles for maximum portability.
2064 installman1dir (man1dir.U):
2065 This variable is really the same as man1direxp, unless you are using
2066 AFS in which case it points to the read/write location whereas
2067 man1direxp only points to the read-only access location. For extra
2068 portability, you should only use this variable within your makefiles.
2070 installman3dir (man3dir.U):
2071 This variable is really the same as man3direxp, unless you are using
2072 AFS in which case it points to the read/write location whereas
2073 man3direxp only points to the read-only access location. For extra
2074 portability, you should only use this variable within your makefiles.
2076 installprefix (installprefix.U):
2077 This variable holds the name of the directory below which
2078 "make install" will install the package. For most users, this
2079 is the same as prefix. However, it is useful for
2080 installing the software into a different (usually temporary)
2081 location after which it can be bundled up and moved somehow
2082 to the final location specified by prefix.
2084 installprefixexp (installprefix.U):
2085 This variable holds the full absolute path of installprefix
2086 with all ~-expansion done.
2088 installprivlib (privlib.U):
2089 This variable is really the same as privlibexp but may differ on
2090 those systems using AFS. For extra portability, only this variable
2091 should be used in makefiles.
2093 installscript (scriptdir.U):
2094 This variable is usually the same as scriptdirexp, unless you are on
2095 a system running AFS, in which case they may differ slightly. You
2096 should always use this variable within your makefiles for portability.
2098 installsitearch (sitearch.U):
2099 This variable is really the same as sitearchexp but may differ on
2100 those systems using AFS. For extra portability, only this variable
2101 should be used in makefiles.
2103 installsitelib (sitelib.U):
2104 This variable is really the same as sitelibexp but may differ on
2105 those systems using AFS. For extra portability, only this variable
2106 should be used in makefiles.
2108 installstyle (installstyle.U):
2109 This variable describes the "style" of the perl installation.
2110 This is intended to be useful for tools that need to
2111 manipulate entire perl distributions. Perl itself doesn't use
2112 this to find its libraries -- the library directories are
2113 stored directly in Config.pm. Currently, there are only two
2114 styles: "lib" and "lib/perl5". The default library locations
2115 (e.g. privlib, sitelib) are either $prefix/lib or
2116 $prefix/lib/perl5. The former is useful if $prefix is a
2117 directory dedicated to perl (e.g. /opt/perl), while the latter
2118 is useful if $prefix is shared by many packages, e.g. if
2120 This may later be extended to include other information, so
2121 be careful with pattern-matching on the results.
2122 For compatibility with perl5.005 and earlier, the default
2123 setting is based on whether or not $prefix contains the string
2126 installusrbinperl (instubperl.U):
2127 This variable tells whether Perl should be installed also as
2128 /usr/bin/perl in addition to
2131 installvendorlib (vendorlib.U):
2132 This variable is really the same as vendorlibexp but may differ on
2133 those systems using AFS. For extra portability, only this variable
2134 should be used in makefiles.
2136 intsize (intsize.U):
2137 This variable contains the value of the INTSIZE symbol, which
2138 indicates to the C program how many bytes there are in an int.
2140 known_extensions (Extensions.U):
2141 This variable holds a list of all XS extensions included in
2145 This variable is defined but not used by Configure.
2146 The value is a plain '' and is not useful.
2149 This variable contains a flag which will tell the C compiler and loader
2150 to produce a program running with a large memory model. It is up to
2151 the Makefile to use this.
2154 This variable indicates the program to be used to link
2155 libraries for dynamic loading. On some systems, it is 'ld'.
2156 On ELF systems, it should be $cc. Mostly, we'll try to respect
2157 the hint file setting.
2159 lddlflags (dlsrc.U):
2160 This variable contains any special flags that might need to be
2161 passed to $ld to create a shared library suitable for dynamic
2162 loading. It is up to the makefile to use it. For hpux, it
2163 should be '-b'. For sunos 4.1, it is empty.
2165 ldflags (ccflags.U):
2166 This variable contains any additional C loader flags desired by
2167 the user. It is up to the Makefile to use this.
2169 ldlibpthname (libperl.U):
2170 This variable holds the name of the shared library
2171 search path, often LD_LIBRARY_PATH. To get an empty
2172 string, the hints file must set this to 'none'.
2175 This variable is be used internally by Configure to determine the
2176 full pathname (if any) of the less program. After Configure runs,
2177 the value is reset to a plain "less" and is not useful.
2180 This is an old synonym for _a.
2183 This variable contains the location of the C library.
2185 libperl (libperl.U):
2186 The perl executable is obtained by linking perlmain.c with
2187 libperl, any static extensions (usually just DynaLoader),
2188 and any other libraries needed on this system. libperl
2189 is usually libperl.a, but can also be libperl.so.xxx if
2190 the user wishes to build a perl executable with a shared
2194 This variable holds the general path (space-separated) used to find
2195 libraries. It is intended to be used by other units.
2198 This variable holds the additional libraries we want to use.
2199 It is up to the Makefile to deal with it.
2201 libswanted (Myinit.U):
2202 This variable holds a list of all the libraries we want to
2203 search. The order is chosen to pick up the c library
2204 ahead of ucb or bsd libraries for SVR4.
2207 This variable is defined but not used by Configure.
2208 The value is a plain '' and is not useful.
2211 This variable is defined but not used by Configure.
2212 The value is a plain '' and is not useful.
2214 lkflags (ccflags.U):
2215 This variable contains any additional C partial linker flags desired by
2216 the user. It is up to the Makefile to use this.
2219 This variable is be used internally by Configure to determine the
2220 full pathname (if any) of the ln program. After Configure runs,
2221 the value is reset to a plain "ln" and is not useful.
2224 This variable holds the name of the command to make
2225 symbolic links (if they are supported). It can be used
2226 in the Makefile. It is either 'ln -s' or 'ln'
2228 locincpth (ccflags.U):
2229 This variable contains a list of additional directories to be
2230 searched by the compiler. The appropriate '-I' directives will
2231 be added to ccflags. This is intended to simplify setting
2232 local directories from the Configure command line.
2233 It's not much, but it parallels the loclibpth stuff in libpth.U.
2235 loclibpth (libpth.U):
2236 This variable holds the paths (space-separated) used to find local
2237 libraries. It is prepended to libpth, and is intended to be easily
2238 set from the command line.
2240 longdblsize (d_longdbl.U):
2241 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2242 indicates to the C program how many bytes there are in a long double,
2243 if this system supports long doubles.
2245 longlongsize (d_longlong.U):
2246 This variable contains the value of the LONGLONGSIZE symbol, which
2247 indicates to the C program how many bytes there are in a long long,
2248 if this system supports long long.
2250 longsize (intsize.U):
2251 This variable contains the value of the LONGSIZE symbol, which
2252 indicates to the C program how many bytes there are in a long.
2255 This variable is defined but not used by Configure.
2256 The value is a plain '' and is not useful.
2259 This variable is defined but not used by Configure.
2260 The value is a plain '' and is not useful.
2263 This variable is be used internally by Configure to determine the
2264 full pathname (if any) of the ls program. After Configure runs,
2265 the value is reset to a plain "ls" and is not useful.
2267 lseeksize (lseektype.U):
2268 This variable defines lseektype to be something like off_t, long,
2269 or whatever type is used to declare lseek offset's type in the
2270 kernel (which also appears to be lseek's return type).
2272 lseektype (lseektype.U):
2273 This variable defines lseektype to be something like off_t, long,
2274 or whatever type is used to declare lseek offset's type in the
2275 kernel (which also appears to be lseek's return type).
2278 This variable is defined but not used by Configure.
2279 The value is a plain '' and is not useful.
2282 This variable is defined but not used by Configure.
2283 The value is a plain '' and is not useful.
2286 This variable is be used internally by Configure to determine the
2287 full pathname (if any) of the make program. After Configure runs,
2288 the value is reset to a plain "make" and is not useful.
2290 make_set_make (make.U):
2291 Some versions of 'make' set the variable MAKE. Others do not.
2292 This variable contains the string to be included in Makefile.SH
2293 so that MAKE is set if needed, and not if not needed.
2294 Possible values are:
2295 make_set_make='#' # If your make program handles this for you,
2296 make_set_make="MAKE=$make" # if it doesn't.
2297 I used a comment character so that we can distinguish a
2298 'set' value (from a previous config.sh or Configure '-D' option)
2299 from an uncomputed value.
2301 mallocobj (mallocsrc.U):
2302 This variable contains the name of the malloc.o that this package
2303 generates, if that malloc.o is preferred over the system malloc.
2304 Otherwise the value is null. This variable is intended for generating
2305 Makefiles. See mallocsrc.
2307 mallocsrc (mallocsrc.U):
2308 This variable contains the name of the malloc.c that comes with
2309 the package, if that malloc.c is preferred over the system malloc.
2310 Otherwise the value is null. This variable is intended for generating
2313 malloctype (mallocsrc.U):
2314 This variable contains the kind of ptr returned by malloc and realloc.
2316 man1dir (man1dir.U):
2317 This variable contains the name of the directory in which manual
2318 source pages are to be put. It is the responsibility of the
2319 Makefile.SH to get the value of this into the proper command.
2320 You must be prepared to do the ~name expansion yourself.
2322 man1direxp (man1dir.U):
2323 This variable is the same as the man1dir variable, but is filename
2324 expanded at configuration time, for convenient use in makefiles.
2326 man1ext (man1dir.U):
2327 This variable contains the extension that the manual page should
2328 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2331 man3dir (man3dir.U):
2332 This variable contains the name of the directory in which manual
2333 source pages are to be put. It is the responsibility of the
2334 Makefile.SH to get the value of this into the proper command.
2335 You must be prepared to do the ~name expansion yourself.
2337 man3direxp (man3dir.U):
2338 This variable is the same as the man3dir variable, but is filename
2339 expanded at configuration time, for convenient use in makefiles.
2341 man3ext (man3dir.U):
2342 This variable contains the extension that the manual page should
2343 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2347 This variable is be used internally by Configure to determine the
2348 full pathname (if any) of the Mcc program. After Configure runs,
2349 the value is reset to a plain "Mcc" and is not useful.
2352 This variable contains a flag which will tell the C compiler and loader
2353 to produce a program running with a medium memory model. If the
2354 medium model is not supported, contains the flag to produce large
2355 model programs. It is up to the Makefile to use this.
2357 mips_type (usrinc.U):
2358 This variable holds the environment type for the mips system.
2359 Possible values are "BSD 4.3" and "System V".
2362 This variable is be used internally by Configure to determine the
2363 full pathname (if any) of the mkdir program. After Configure runs,
2364 the value is reset to a plain "mkdir" and is not useful.
2366 mmaptype (d_mmap.U):
2367 This symbol contains the type of pointer returned by mmap()
2368 (and simultaneously the type of the first argument).
2369 It can be 'void *' or 'caddr_t'.
2372 This variable contains the list of memory models supported by this
2373 system. Possible component values are none, split, unsplit, small,
2374 medium, large, and huge. The component values are space separated.
2376 modetype (modetype.U):
2377 This variable defines modetype to be something like mode_t,
2378 int, unsigned short, or whatever type is used to declare file
2379 modes for system calls.
2382 This variable is be used internally by Configure to determine the
2383 full pathname (if any) of the more program. After Configure runs,
2384 the value is reset to a plain "more" and is not useful.
2386 multiarch (multiarch.U):
2387 This variable conditionally defines the MULTIARCH symbol
2388 which signifies the presence of multiplatform files.
2389 This is normally set by hints files.
2392 This variable is defined but not used by Configure.
2393 The value is a plain '' and is not useful.
2395 myarchname (archname.U):
2396 This variable holds the architecture name computed by Configure in
2397 a previous run. It is not intended to be perused by any user and
2398 should never be set in a hint file.
2400 mydomain (myhostname.U):
2401 This variable contains the eventual value of the MYDOMAIN symbol,
2402 which is the domain of the host the program is going to run on.
2403 The domain must be appended to myhostname to form a complete host name.
2404 The dot comes with mydomain, and need not be supplied by the program.
2406 myhostname (myhostname.U):
2407 This variable contains the eventual value of the MYHOSTNAME symbol,
2408 which is the name of the host the program is going to run on.
2409 The domain is not kept with hostname, but must be gotten from mydomain.
2410 The dot comes with mydomain, and need not be supplied by the program.
2412 myuname (Oldconfig.U):
2413 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2414 pseudo variables assignments in the output are stripped, thank you. The
2415 whole thing is then lower-cased.
2418 This variable contains the '-n' flag if that is what causes the echo
2419 command to suppress newline. Otherwise it is null. Correct usage is
2420 $echo $n "prompt for a question: $c".
2422 netdb_hlen_type (netdbtype.U):
2423 This variable holds the type used for the 2nd argument to
2424 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2425 This is only useful if you have gethostbyaddr(), naturally.
2427 netdb_host_type (netdbtype.U):
2428 This variable holds the type used for the 1st argument to
2429 gethostbyaddr(). Usually, this is char * or void *, possibly
2430 with or without a const prefix.
2431 This is only useful if you have gethostbyaddr(), naturally.
2433 netdb_name_type (netdbtype.U):
2434 This variable holds the type used for the argument to
2435 gethostbyname(). Usually, this is char * or const char *.
2436 This is only useful if you have gethostbyname(), naturally.
2438 netdb_net_type (netdbtype.U):
2439 This variable holds the type used for the 1st argument to
2440 getnetbyaddr(). Usually, this is int or long.
2441 This is only useful if you have getnetbyaddr(), naturally.
2444 This variable is be used internally by Configure to determine the
2445 full pathname (if any) of the nm program. After Configure runs,
2446 the value is reset to a plain "nm" and is not useful.
2449 This variable holds the options that may be necessary for nm.
2451 nm_so_opt (usenm.U):
2452 This variable holds the options that may be necessary for nm
2453 to work on a shared library but that can not be used on an
2454 archive library. Currently, this is only used by Linux, where
2455 nm --dynamic is *required* to get symbols from an ELF library which
2456 has been stripped, but nm --dynamic is *fatal* on an archive library.
2457 Maybe Linux should just always set usenm=false.
2459 nonxs_ext (Extensions.U):
2460 This variable holds a list of all non-xs extensions included
2461 in the package. All of them will be built.
2464 This variable is be used internally by Configure to determine the
2465 full pathname (if any) of the nroff program. After Configure runs,
2466 the value is reset to a plain "nroff" and is not useful.
2468 o_nonblock (nblock_io.U):
2469 This variable bears the symbol value to be used during open() or fcntl()
2470 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2471 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2472 but that is only supported by some devices.
2475 This is an old synonym for _o.
2477 old_pthread_create_joinable (d_pthrattrj.U):
2478 This variable defines the constant to use for creating joinable
2479 (aka undetached) pthreads. Unused if pthread.h defines
2480 PTHREAD_CREATE_JOINABLE. If used, possible values are
2481 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2483 optimize (ccflags.U):
2484 This variable contains any optimizer/debugger flag that should be used.
2485 It is up to the Makefile to use it.
2487 orderlib (orderlib.U):
2488 This variable is "true" if the components of libraries must be ordered
2489 (with `lorder $* | tsort`) before placing them in an archive. Set to
2490 "false" if ranlib or ar can generate random libraries.
2492 osname (Oldconfig.U):
2493 This variable contains the operating system name (e.g. sunos,
2494 solaris, hpux, etc.). It can be useful later on for setting
2495 defaults. Any spaces are replaced with underscores. It is set
2496 to a null string if we can't figure it out.
2498 osvers (Oldconfig.U):
2499 This variable contains the operating system version (e.g.
2500 4.1.3, 5.2, etc.). It is primarily used for helping select
2501 an appropriate hints file, but might be useful elsewhere for
2502 setting defaults. It is set to '' if we can't figure it out.
2503 We try to be flexible about how much of the version number
2504 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2505 same for this package, hints files might just be os_4.0 or
2506 os_4.1, etc., not keeping separate files for each little release.
2508 package (package.U):
2509 This variable contains the name of the package being constructed.
2510 It is primarily intended for the use of later Configure units.
2513 This variable contains the name of the preferred pager on the system.
2514 Usual values are (the full pathnames of) more, less, pg, or cat.
2517 This variable contains a command that produces the text of the
2518 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2519 "ypcat passwd" when NIS is used.
2521 patchlevel (patchlevel.U):
2522 The patchlevel level of this package.
2523 The value of patchlevel comes from the patchlevel.h file.
2526 This is an old synonym for p_ in Head.U, the character
2527 used to separate elements in the command shell search PATH.
2530 This variable is defined but not used by Configure.
2531 The value is a plain '' and is not useful.
2533 perladmin (perladmin.U):
2534 Electronic mail address of the perl5 administrator.
2536 perlpath (perlpath.U):
2537 This variable contains the eventual value of the PERLPATH symbol,
2538 which contains the name of the perl interpreter to be used in
2539 shell scripts and in the "eval 'exec'" idiom.
2542 This variable is be used internally by Configure to determine the
2543 full pathname (if any) of the pg program. After Configure runs,
2544 the value is reset to a plain "pg" and is not useful.
2546 phostname (myhostname.U):
2547 This variable contains the eventual value of the PHOSTNAME symbol,
2548 which is a command that can be fed to popen() to get the host name.
2549 The program should probably not presume that the domain is or isn't
2552 pidtype (pidtype.U):
2553 This variable defines PIDTYPE to be something like pid_t, int,
2554 ushort, or whatever type is used to declare process ids in the kernel.
2557 Holds the private path used by Configure to find out the libraries.
2558 Its value is prepend to libpth. This variable takes care of special
2559 machines, like the mips. Usually, it should be empty.
2562 This variable is defined but not used by Configure.
2563 The value is a plain '' and is not useful.
2566 This variable is defined but not used by Configure.
2567 The value is a plain '' and is not useful.
2570 This variable holds the name of the directory below which the
2571 user will install the package. Usually, this is /usr/local, and
2572 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2573 man pages in /usr/local/man, etc. It is only used to set defaults
2574 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2576 prefixexp (prefix.U):
2577 This variable holds the full absolute path of the directory below
2578 which the user will install the package. Derived from prefix.
2580 privlib (privlib.U):
2581 This variable contains the eventual value of the PRIVLIB symbol,
2582 which is the name of the private library for this package. It may
2583 have a ~ on the front. It is up to the makefile to eventually create
2584 this directory while performing installation (with ~ substitution).
2586 privlibexp (privlib.U):
2587 This variable is the ~name expanded version of privlib, so that you
2588 may use it directly in Makefiles or shell scripts.
2590 prototype (prototype.U):
2591 This variable holds the eventual value of CAN_PROTOTYPE, which
2592 indicates the C compiler can handle funciton prototypes.
2594 ptrsize (ptrsize.U):
2595 This variable contains the value of the PTRSIZE symbol, which
2596 indicates to the C program how many bytes there are in a pointer.
2598 randbits (randfunc.U):
2599 Indicates how many bits are produced by the function used to
2600 generate normalized random numbers.
2602 randfunc (randfunc.U):
2603 Indicates the name of the random number function to use.
2604 Values include drand48, random, and rand. In C programs,
2605 the 'Drand01' macro is defined to generate uniformly distributed
2606 random numbers over the range [0., 1.[ (see drand01 and nrand).
2608 randseedtype (randfunc.U):
2609 Indicates the type of the argument of the seedfunc.
2611 ranlib (orderlib.U):
2612 This variable is set to the pathname of the ranlib program, if it is
2613 needed to generate random libraries. Set to ":" if ar can generate
2614 random libraries or if random libraries are not supported
2616 rd_nodata (nblock_io.U):
2617 This variable holds the return code from read() when no data is
2618 present. It should be -1, but some systems return 0 when O_NDELAY is
2619 used, which is a shame because you cannot make the difference between
2620 no data and an EOF.. Sigh!
2623 This variable is be used internally by Configure to determine the
2624 full pathname (if any) of the rm program. After Configure runs,
2625 the value is reset to a plain "rm" and is not useful.
2628 This variable is defined but not used by Configure.
2629 The value is a plain '' and is not useful.
2632 This variable contains 'true' or 'false' depending whether the
2633 nm extraction should be performed or not, according to the value
2634 of usenm and the flags on the Configure command line.
2636 sched_yield (d_pthread_y.U):
2637 This variable defines the way to yield the execution
2638 of the current thread.
2640 scriptdir (scriptdir.U):
2641 This variable holds the name of the directory in which the user wants
2642 to put publicly scripts for the package in question. It is either
2643 the same directory as for binaries, or a special one that can be
2644 mounted across different architectures, like /usr/share. Programs
2645 must be prepared to deal with ~name expansion.
2647 scriptdirexp (scriptdir.U):
2648 This variable is the same as scriptdir, but is filename expanded
2649 at configuration time, for programs not wanting to bother with it.
2652 This variable is be used internally by Configure to determine the
2653 full pathname (if any) of the sed program. After Configure runs,
2654 the value is reset to a plain "sed" and is not useful.
2656 seedfunc (randfunc.U):
2657 Indicates the random number generating seed function.
2658 Values include srand48, srandom, and srand.
2660 selectminbits (selectminbits.U):
2661 This variable holds the minimum number of bits operated by select.
2662 That is, if you do select(n, ...), how many bits at least will be
2663 cleared in the masks if some activity is detected. Usually this
2664 is either n or 32*ceil(n/32), especially many little-endians do
2665 the latter. This is only useful if you have select(), naturally.
2667 selecttype (selecttype.U):
2668 This variable holds the type used for the 2nd, 3rd, and 4th
2669 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2670 is defined, and 'int *' otherwise. This is only useful if you
2671 have select(), naturally.
2674 This variable is defined but not used by Configure.
2675 The value is a plain '' and is not useful.
2678 This variable contains the full pathname of the shell used
2679 on this system to execute Bourne shell scripts. Usually, this will be
2680 /bin/sh, though it's possible that some systems will have /bin/ksh,
2681 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2683 This unit comes before Options.U, so you can't set sh with a '-D'
2684 option, though you can override this (and startsh)
2685 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2688 This variable is defined but not used by Configure.
2689 The value is a plain '' and is not useful.
2691 sharpbang (spitshell.U):
2692 This variable contains the string #! if this system supports that
2695 shmattype (d_shmat.U):
2696 This symbol contains the type of pointer returned by shmat().
2697 It can be 'void *' or 'char *'.
2699 shortsize (intsize.U):
2700 This variable contains the value of the SHORTSIZE symbol which
2701 indicates to the C program how many bytes there are in a short.
2703 shrpenv (libperl.U):
2704 If the user builds a shared libperl.so, then we need to tell the
2705 'perl' executable where it will be able to find the installed libperl.so.
2706 One way to do this on some systems is to set the environment variable
2707 LD_RUN_PATH to the directory that will be the final location of the
2708 shared libperl.so. The makefile can use this with something like
2709 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2711 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2714 See the main perl Makefile.SH for actual working usage.
2715 Alternatively, we might be able to use a command line option such
2716 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2717 $archlibexp/CORE (Linux).
2719 shsharp (spitshell.U):
2720 This variable tells further Configure units whether your sh can
2723 sig_count (sig_name.U):
2724 This variable holds a number larger than the largest valid
2725 signal number. This is usually the same as the NSIG macro.
2727 sig_name (sig_name.U):
2728 This variable holds the signal names, space separated. The leading
2729 SIG in signal name is removed. A ZERO is prepended to the
2730 list. This is currently not used.
2732 sig_name_init (sig_name.U):
2733 This variable holds the signal names, enclosed in double quotes and
2734 separated by commas, suitable for use in the SIG_NAME definition
2735 below. A "ZERO" is prepended to the list, and the list is
2736 terminated with a plain 0. The leading SIG in signal names
2737 is removed. See sig_num.
2739 sig_num (sig_name.U):
2740 This variable holds the signal numbers, space separated. A ZERO is
2741 prepended to the list (corresponding to the fake SIGZERO), and
2742 the list is terminated with a 0. Those numbers correspond to
2743 the value of the signal listed in the same place within the
2746 sig_num_init (sig_name.U):
2747 This variable holds the signal numbers, enclosed in double quotes and
2748 separated by commas, suitable for use in the SIG_NUM definition
2749 below. A "ZERO" is prepended to the list, and the list is
2750 terminated with a plain 0.
2752 signal_t (d_voidsig.U):
2753 This variable holds the type of the signal handler (void or int).
2755 sitearch (sitearch.U):
2756 This variable contains the eventual value of the SITEARCH symbol,
2757 which is the name of the private library for this package. It may
2758 have a ~ on the front. It is up to the makefile to eventually create
2759 this directory while performing installation (with ~ substitution).
2761 sitearchexp (sitearch.U):
2762 This variable is the ~name expanded version of sitearch, so that you
2763 may use it directly in Makefiles or shell scripts.
2765 sitelib (sitelib.U):
2766 This variable contains the eventual value of the SITELIB symbol,
2767 which is the name of the private library for this package. It may
2768 have a ~ on the front. It is up to the makefile to eventually create
2769 this directory while performing installation (with ~ substitution).
2771 sitelibexp (sitelib.U):
2772 This variable is the ~name expanded version of sitelib, so that you
2773 may use it directly in Makefiles or shell scripts.
2775 siteprefix (siteprefix.U):
2776 This variable holds the full absolute path of the directory below
2777 which the user will install add-on packages.
2779 siteprefixexp (siteprefix.U):
2780 This variable holds the full absolute path of the directory below
2781 which the user will install add-on packages. Derived from siteprefix.
2783 sizetype (sizetype.U):
2784 This variable defines sizetype to be something like size_t,
2785 unsigned long, or whatever type is used to declare length
2786 parameters for string functions.
2789 This variable is defined but not used by Configure.
2790 The value is a plain '' and is not useful.
2793 This variable is defined but not used by Configure.
2794 The value is a plain '' and is not useful.
2797 This variable contains a flag which will tell the C compiler and loader
2798 to produce a program running with a small memory model. It is up to
2799 the Makefile to use this.
2802 This variable holds the extension used to identify shared libraries
2803 (also known as shared objects) on the system. Usually set to 'so'.
2805 sockethdr (d_socket.U):
2806 This variable has any cpp '-I' flags needed for socket support.
2808 socketlib (d_socket.U):
2809 This variable has the names of any libraries needed for socket support.
2812 This variable is be used internally by Configure to determine the
2813 full pathname (if any) of the sort program. After Configure runs,
2814 the value is reset to a plain "sort" and is not useful.
2816 spackage (package.U):
2817 This variable contains the name of the package being constructed,
2818 with the first letter uppercased, i.e. suitable for starting
2821 spitshell (spitshell.U):
2822 This variable contains the command necessary to spit out a runnable
2823 shell on this system. It is either cat or a grep '-v' for # comments.
2826 This variable contains a flag which will tell the C compiler and loader
2827 to produce a program that will run in separate I and D space, for those
2828 machines that support separation of instruction and data space. It is
2829 up to the Makefile to use this.
2831 sPRId64 (quadfio.U):
2832 This variable, if defined, contains the string used by stdio to
2833 format 64-bit decimal numbers (format 'd') for output.
2835 sPRIeldbl (longdblfio.U):
2836 This variable, if defined, contains the string used by stdio to
2837 format long doubles (format 'e') for output.
2839 sPRIEldbl (longdblfio.U):
2840 This variable, if defined, contains the string used by stdio to
2841 format long doubles (format 'E') for output.
2843 sPRIfldbl (longdblfio.U):
2844 This variable, if defined, contains the string used by stdio to
2845 format long doubles (format 'f') for output.
2847 sPRIFldbl (longdblfio.U):
2848 This variable, if defined, contains the string used by stdio to
2849 format long doubles (format 'F') for output.
2851 sPRIgldbl (longdblfio.U):
2852 This variable, if defined, contains the string used by stdio to
2853 format long doubles (format 'g') for output.
2855 sPRIGldbl (longdblfio.U):
2856 This variable, if defined, contains the string used by stdio to
2857 format long doubles (format 'G') for output.
2859 sPRIi64 (quadfio.U):
2860 This variable, if defined, contains the string used by stdio to
2861 format 64-bit decimal numbers (format 'i') for output.
2863 sPRIo64 (quadfio.U):
2864 This variable, if defined, contains the string used by stdio to
2865 format 64-bit octal numbers (format 'o') for output.
2867 sPRIu64 (quadfio.U):
2868 This variable, if defined, contains the string used by stdio to
2869 format 64-bit unsigned decimal numbers (format 'u') for output.
2871 sPRIx64 (quadfio.U):
2872 This variable, if defined, contains the string used by stdio to
2873 format 64-bit hexadecimal numbers (format 'x') for output.
2875 sPRIX64 (quadfio.U):
2876 This variable, if defined, contains the string used by stdio to
2877 format 64-bit hExADECimAl numbers (format 'X') for output.
2880 This variable holds the path to the package source. It is up to
2881 the Makefile to use this variable and set VPATH accordingly to
2882 find the sources remotely.
2884 ssizetype (ssizetype.U):
2885 This variable defines ssizetype to be something like ssize_t,
2886 long or int. It is used by functions that return a count
2887 of bytes or an error condition. It must be a signed type.
2888 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2890 startperl (startperl.U):
2891 This variable contains the string to put on the front of a perl
2892 script to make sure (hopefully) that it runs with perl and not some
2893 shell. Of course, that leading line must be followed by the classical
2895 eval 'exec perl -S $0 ${1+"$@"}'
2896 if $running_under_some_shell;
2897 to guarantee perl startup should the shell execute the script. Note
2898 that this magic incatation is not understood by csh.
2900 startsh (startsh.U):
2901 This variable contains the string to put on the front of a shell
2902 script to make sure (hopefully) that it runs with sh and not some
2905 static_ext (Extensions.U):
2906 This variable holds a list of XS extension files we want to
2907 link statically into the package. It is used by Makefile.
2909 stdchar (stdchar.U):
2910 This variable conditionally defines STDCHAR to be the type of char
2911 used in stdio.h. It has the values "unsigned char" or "char".
2913 stdio_base (d_stdstdio.U):
2914 This variable defines how, given a FILE pointer, fp, to access the
2915 _base field (or equivalent) of stdio.h's FILE structure. This will
2916 be used to define the macro FILE_base(fp).
2918 stdio_bufsiz (d_stdstdio.U):
2919 This variable defines how, given a FILE pointer, fp, to determine
2920 the number of bytes store in the I/O buffer pointer to by the
2921 _base field (or equivalent) of stdio.h's FILE structure. This will
2922 be used to define the macro FILE_bufsiz(fp).
2924 stdio_cnt (d_stdstdio.U):
2925 This variable defines how, given a FILE pointer, fp, to access the
2926 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2927 be used to define the macro FILE_cnt(fp).
2929 stdio_filbuf (d_stdstdio.U):
2930 This variable defines how, given a FILE pointer, fp, to tell
2931 stdio to refill it's internal buffers (?). This will
2932 be used to define the macro FILE_filbuf(fp).
2934 stdio_ptr (d_stdstdio.U):
2935 This variable defines how, given a FILE pointer, fp, to access the
2936 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2937 be used to define the macro FILE_ptr(fp).
2939 stdio_stream_array (stdio_streams.U):
2940 This variable tells the name of the array holding the stdio streams.
2941 Usual values include _iob, __iob, and __sF.
2943 strings (i_string.U):
2944 This variable holds the full path of the string header that will be
2945 used. Typically /usr/include/string.h or /usr/include/strings.h.
2948 This variable is defined but not used by Configure.
2949 The value is a plain '' and is not useful.
2951 subversion (patchlevel.U):
2952 The subversion level of this package.
2953 The value of subversion comes from the patchlevel.h file.
2954 This is unique to perl.
2957 This variable holds the place where the manual is located on this
2958 system. It is not the place where the user wants to put his manual
2959 pages. Rather it is the place where Configure may look to find manual
2960 for unix commands (section 1 of the manual usually). See mansrc.
2963 This variable is defined but not used by Configure.
2964 The value is a plain '' and is not useful.
2967 This variable is defined but not used by Configure.
2968 The value is a plain '' and is not useful.
2971 This variable is defined but not used by Configure.
2972 The value is a plain '' and is not useful.
2975 This variable is defined but not used by Configure.
2976 The value is a plain '' and is not useful.
2979 This variable is be used internally by Configure to determine the
2980 full pathname (if any) of the test program. After Configure runs,
2981 the value is reset to a plain "test" and is not useful.
2983 timeincl (i_time.U):
2984 This variable holds the full path of the included time header(s).
2986 timetype (d_time.U):
2987 This variable holds the type returned by time(). It can be long,
2988 or time_t on BSD sites (in which case <sys/types.h> should be
2989 included). Anyway, the type Time_t should be used.
2992 This variable is be used internally by Configure to determine the
2993 full pathname (if any) of the touch program. After Configure runs,
2994 the value is reset to a plain "touch" and is not useful.
2997 This variable is be used internally by Configure to determine the
2998 full pathname (if any) of the tr program. After Configure runs,
2999 the value is reset to a plain "tr" and is not useful.
3002 This variable contains the value to be passed to the tr(1)
3003 command to transliterate a newline. Typical values are
3004 '\012' and '\n'. This is needed for EBCDIC systems where
3005 newline is not necessarily '\012'.
3008 This variable is defined but not used by Configure.
3009 The value is a plain '' and is not useful.
3011 uidtype (uidtype.U):
3012 This variable defines Uid_t to be something like uid_t, int,
3013 ushort, or whatever type is used to declare user ids in the kernel.
3016 This variable is be used internally by Configure to determine the
3017 full pathname (if any) of the uname program. After Configure runs,
3018 the value is reset to a plain "uname" and is not useful.
3021 This variable is be used internally by Configure to determine the
3022 full pathname (if any) of the uniq program. After Configure runs,
3023 the value is reset to a plain "uniq" and is not useful.
3025 use64bits (use64bits.U):
3026 This variable conditionally defines the USE_64_BITS symbol,
3027 and indicates that explicit 64-bit interfaces should be used
3031 This variable indicates if the the system supports dynamic
3032 loading of some sort. See also dlsrc and dlobj.
3034 uselongdouble (uselongdbl.U):
3035 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3036 and indicates that long doubles should be used when available.
3038 usemultiplicity (usemultiplicity.U):
3039 This variable conditionally defines the MULTIPLICITY symbol,
3040 and indicates that Perl should be built to use multiplicity.
3042 usemymalloc (mallocsrc.U):
3043 This variable contains y if the malloc that comes with this package
3044 is desired over the system's version of malloc. People often include
3045 special versions of malloc for effiency, but such versions are often
3046 less portable. See also mallocsrc and mallocobj.
3047 If this is 'y', then -lmalloc is removed from $libs.
3050 This variable contains 'true' or 'false' depending whether the
3051 nm extraction is wanted or not.
3053 useopcode (Extensions.U):
3054 This variable holds either 'true' or 'false' to indicate
3055 whether the Opcode extension should be used. The sole
3056 use for this currently is to allow an easy mechanism
3057 for users to skip the Opcode extension from the Configure
3060 useperlio (useperlio.U):
3061 This variable conditionally defines the USE_PERLIO symbol,
3062 and indicates that the PerlIO abstraction should be
3065 useposix (Extensions.U):
3066 This variable holds either 'true' or 'false' to indicate
3067 whether the POSIX extension should be used. The sole
3068 use for this currently is to allow an easy mechanism
3069 for hints files to indicate that POSIX will not compile
3070 on a particular system.
3073 This variable is set to true when the user agrees to use sfio.
3074 It is set to false when sfio is not available or when the user
3075 explicitely requests not to use sfio. It is here primarily so
3076 that command-line settings can override the auto-detection of
3077 d_sfio without running into a "WHOA THERE".
3079 useshrplib (libperl.U):
3080 This variable is set to 'yes' if the user wishes
3081 to build a shared libperl, and 'no' otherwise.
3083 usesocks (usesocks.U):
3084 This variable conditionally defines the USE_SOCKS symbol,
3085 and indicates that Perl should be built to use SOCKS.
3087 usethreads (usethreads.U):
3088 This variable conditionally defines the USE_THREADS symbol,
3089 and indicates that Perl should be built to use threads.
3091 usevendorprefix (vendorprefix.U):
3092 This variable tells whether the vendorprefix
3093 and consequently other vendor* paths are in use.
3095 usevfork (d_vfork.U):
3096 This variable is set to true when the user accepts to use vfork.
3097 It is set to false when no vfork is available or when the user
3098 explicitely requests not to use vfork.
3101 This variable holds the path of the include files, which is
3102 usually /usr/include. It is mainly used by other Configure units.
3105 This variable is defined but not used by Configure.
3106 The value is a plain '' and is not useful.
3108 vendorlib (vendorlib.U):
3109 This variable contains the eventual value of the VENDORLIB symbol,
3110 which is the name of the private library for this package. It may
3111 have a ~ on the front. It is up to the makefile to eventually create
3112 this directory while performing installation (with ~ substitution).
3113 Vendors who distribute perl binaries may place their own
3114 extensions and modules in this directory.
3116 vendorlibexp (vendorlib.U):
3117 This variable is the ~name expanded version of vendorlib, so that you
3118 may use it directly in Makefiles or shell scripts.
3120 vendorprefix (vendorprefix.U):
3121 This variable holds the full absolute path of the directory below
3122 which the vendor will install add-on packages.
3124 vendorprefixexp (vendorprefix.U):
3125 This variable holds the full absolute path of the directory below
3126 which the vendor will install add-on packages. Derived from vendorprefix.
3128 version (patchlevel.U):
3129 The full version number of this package. This combines
3130 baserev, patchlevel, and subversion to get the full
3131 version number, including any possible subversions. Care
3132 is taken to use the C locale in order to get something
3133 like 5.004 instead of 5,004. This is unique to perl.
3136 This variable is defined but not used by Configure.
3137 The value is a plain '' and is not useful.
3139 voidflags (voidflags.U):
3140 This variable contains the eventual value of the VOIDFLAGS symbol,
3141 which indicates how much support of the void type is given by this
3142 compiler. See VOIDFLAGS for more info.
3145 This variable holds extra path (space-separated) used to find
3146 libraries on this platform, for example CPU-specific libraries
3147 (on multi-CPU platforms) may be listed here.
3150 This variable is defined but not used by Configure.
3151 The value is a plain '' and is not useful.
3154 This variable is be used internally by Configure to determine the
3155 full pathname (if any) of the zip program. After Configure runs,
3156 the value is reset to a plain "zip" and is not useful.