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1This file contains a description of all the shell variables whose value is
2determined by the Configure script. Variables intended for use in C
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3programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4generates pod documentation for Config.pm from this file--please try to keep
5the formatting regular.]
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7_a (Unix.U):
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'.
11
12_exe (Unix.U):
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
15
16_o (Unix.U):
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'.
20
21afs (afs.U):
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
25 what you are doing.
26
27alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
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29 double-- or a long double when applicable. Usual values are
30 2, 4 and 8. The default is eight, for safety.
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31
32ansi2knr (ansi2knr.U):
33 This variable is set if the user needs to run ansi2knr.
34 Currently, this is not supported, so we just abort.
35
36aphostname (d_gethname.U):
37 This variable contains the command which can be used to compute the
38 host name. The command is fully qualified by its absolute path, to make
39 it safe when used by a process with super-user privileges.
40
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41api_revision (patchlevel.U):
42 The three variables, api_revision, api_version, and
43 api_subversion, specify the version of the oldest perl binary
44 compatible with the present perl. In a full version string
45 such as '5.6.1', api_revision is the '5'.
46 Prior to 5.5.640, the format was a floating point number,
47 like 5.00563.
48 perl.c:incpush() and lib/lib.pm will automatically search in
49 $sitelib/.. for older directories back to the limit specified
50 by these api_ variables. This is only useful if you have a
51 perl library directory tree structured like the default one.
52 See INSTALL for how this works. The versioned site_perl
53 directory was introduced in 5.005, so that is the lowest
54 possible value. The version list appropriate for the current
55 system is determined in inc_version_list.U.
56 XXX To do: Since compatibility can depend on compile time
57 options (such as bincompat, longlong, etc.) it should
58 (perhaps) be set by Configure, but currently it isn't.
59 Currently, we read a hard-wired value from patchlevel.h.
60 Perhaps what we ought to do is take the hard-wired value from
61 patchlevel.h but then modify it if the current Configure
62 options warrant. patchlevel.h then would use an #ifdef guard.
63
64api_subversion (patchlevel.U):
65 The three variables, api_revision, api_version, and
66 api_subversion, specify the version of the oldest perl binary
67 compatible with the present perl. In a full version string
68 such as '5.6.1', api_subversion is the '1'. See api_revision for
69 full details.
70
71api_version (patchlevel.U):
72 The three variables, api_revision, api_version, and
73 api_subversion, specify the version of the oldest perl binary
74 compatible with the present perl. In a full version string
75 such as '5.6.1', api_version is the '6'. See api_revision for
76 full details. As a special case, 5.5.0 is rendered in the
77 old-style as 5.005. (In the 5.005_0x maintenance series,
78 this was the only versioned directory in $sitelib.)
79
80api_versionstring (patchlevel.U):
81 This variable combines api_revision, api_version, and
82 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
83 for use as a directory name. This is filesystem dependent.
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84
85ar (Loc.U):
5bf26616 86 This variable is used internally by Configure to determine the
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87 full pathname (if any) of the ar program. After Configure runs,
88 the value is reset to a plain "ar" and is not useful.
89
90archlib (archlib.U):
91 This variable holds the name of the directory in which the user wants
92 to put architecture-dependent public library files for $package.
93 It is most often a local directory such as /usr/local/lib.
94 Programs using this variable must be prepared to deal
95 with filename expansion.
96
97archlibexp (archlib.U):
98 This variable is the same as the archlib variable, but is
99 filename expanded at configuration time, for convenient use.
100
101archname64 (use64bits.U):
102 This variable is used for the 64-bitness part of $archname.
103
104archname (archname.U):
105 This variable is a short name to characterize the current
106 architecture. It is used mainly to construct the default archlib.
107
108archobjs (Unix.U):
109 This variable defines any additional objects that must be linked
110 in with the program on this architecture. On unix, it is usually
111 empty. It is typically used to include emulations of unix calls
112 or other facilities. For perl on OS/2, for example, this would
113 include os2/os2.obj.
114
115awk (Loc.U):
5bf26616 116 This variable is used internally by Configure to determine the
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117 full pathname (if any) of the awk program. After Configure runs,
118 the value is reset to a plain "awk" and is not useful.
119
120baserev (baserev.U):
121 The base revision level of this package, from the .package file.
122
123bash (Loc.U):
124 This variable is defined but not used by Configure.
125 The value is a plain '' and is not useful.
126
127bin (bin.U):
128 This variable holds the name of the directory in which the user wants
129 to put publicly executable images for the package in question. It
130 is most often a local directory such as /usr/local/bin. Programs using
131 this variable must be prepared to deal with ~name substitution.
132
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133bincompat5005 (bincompat5005.U):
134 This variable contains y if Perl 5.006 should be binary-compatible
135 with Perl 5.005.
136
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137binexp (bin.U):
138 This is the same as the bin variable, but is filename expanded at
139 configuration time, for use in your makefiles.
140
141bison (Loc.U):
142 This variable is defined but not used by Configure.
143 The value is a plain '' and is not useful.
144
145byacc (Loc.U):
5bf26616 146 This variable is used internally by Configure to determine the
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147 full pathname (if any) of the byacc program. After Configure runs,
148 the value is reset to a plain "byacc" and is not useful.
149
150byteorder (byteorder.U):
151 This variable holds the byte order. In the following, larger digits
152 indicate more significance. The variable byteorder is either 4321
153 on a big-endian machine, or 1234 on a little-endian, or 87654321
154 on a Cray ... or 3412 with weird order !
155
156c (n.U):
157 This variable contains the \c string if that is what causes the echo
158 command to suppress newline. Otherwise it is null. Correct usage is
159 $echo $n "prompt for a question: $c".
160
161castflags (d_castneg.U):
162 This variable contains a flag that precise difficulties the
163 compiler has casting odd floating values to unsigned long:
164 0 = ok
165 1 = couldn't cast < 0
166 2 = couldn't cast >= 0x80000000
167 4 = couldn't cast in argument expression list
168
169cat (Loc.U):
5bf26616 170 This variable is used internally by Configure to determine the
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171 full pathname (if any) of the cat program. After Configure runs,
172 the value is reset to a plain "cat" and is not useful.
173
174cc (cc.U):
175 This variable holds the name of a command to execute a C compiler which
176 can resolve multiple global references that happen to have the same
177 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
178
179cccdlflags (dlsrc.U):
180 This variable contains any special flags that might need to be
181 passed with 'cc -c' to compile modules to be used to create a shared
182 library that will be used for dynamic loading. For hpux, this
183 should be +z. It is up to the makefile to use it.
184
185ccdlflags (dlsrc.U):
186 This variable contains any special flags that might need to be
187 passed to cc to link with a shared library for dynamic loading.
188 It is up to the makefile to use it. For sunos 4.1, it should
189 be empty.
190
191ccflags (ccflags.U):
192 This variable contains any additional C compiler flags desired by
193 the user. It is up to the Makefile to use this.
194
195ccsymbols (Cppsym.U):
196 The variable contains the symbols defined by the C compiler alone.
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197 The list is a space-separated list of symbol=value tokens.
198
199cf_by (cf_who.U):
200 Login name of the person who ran the Configure script and answered the
201 questions. This is used to tag both config.sh and config_h.SH.
202
203cf_email (cf_email.U):
204 Electronic mail address of the person who ran Configure. This can be
205 used by units that require the user's e-mail, like MailList.U.
206
207cf_time (cf_who.U):
208 Holds the output of the "date" command when the configuration file was
209 produced. This is used to tag both config.sh and config_h.SH.
210
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211charsize (charsize.U):
212 This variable contains the value of the CHARSIZE symbol, which
213 indicates to the C program how many bytes there are in a character.
214
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215chgrp (Loc.U):
216 This variable is defined but not used by Configure.
217 The value is a plain '' and is not useful.
218
219chmod (Loc.U):
220 This variable is defined but not used by Configure.
221 The value is a plain '' and is not useful.
222
223chown (Loc.U):
224 This variable is defined but not used by Configure.
225 The value is a plain '' and is not useful.
226
227clocktype (d_times.U):
228 This variable holds the type returned by times(). It can be long,
229 or clock_t on BSD sites (in which case <sys/types.h> should be
230 included).
231
232comm (Loc.U):
5bf26616 233 This variable is used internally by Configure to determine the
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234 full pathname (if any) of the comm program. After Configure runs,
235 the value is reset to a plain "comm" and is not useful.
236
237compress (Loc.U):
238 This variable is defined but not used by Configure.
239 The value is a plain '' and is not useful.
240
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241CONFIGDOTSH (Oldsyms.U):
242 This is set to 'true' in config.sh so that a shell script
243 sourcing config.sh can tell if it has been sourced already.
244
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245contains (contains.U):
246 This variable holds the command to do a grep with a proper return
247 status. On most sane systems it is simply "grep". On insane systems
248 it is a grep followed by a cat followed by a test. This variable
249 is primarily for the use of other Configure units.
250
251cp (Loc.U):
5bf26616 252 This variable is used internally by Configure to determine the
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253 full pathname (if any) of the cp program. After Configure runs,
254 the value is reset to a plain "cp" and is not useful.
255
256cpio (Loc.U):
257 This variable is defined but not used by Configure.
258 The value is a plain '' and is not useful.
259
260cpp (Loc.U):
5bf26616 261 This variable is used internally by Configure to determine the
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262 full pathname (if any) of the cpp program. After Configure runs,
263 the value is reset to a plain "cpp" and is not useful.
264
265cpp_stuff (cpp_stuff.U):
266 This variable contains an identification of the catenation mechanism
267 used by the C preprocessor.
268
269cppccsymbols (Cppsym.U):
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270 The variable contains the symbols defined by both
271 the bare C compiler and during a compilation that
272 includes stdio.h.
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273 The list is a space-separated list of symbol=value tokens.
274
275cppflags (ccflags.U):
276 This variable holds the flags that will be passed to the C pre-
277 processor. It is up to the Makefile to use it.
278
279cpplast (cppstdin.U):
280 This variable has the same functionality as cppminus, only it applies
281 to cpprun and not cppstdin.
282
283cppminus (cppstdin.U):
284 This variable contains the second part of the string which will invoke
285 the C preprocessor on the standard input and produce to standard
286 output. This variable will have the value "-" if cppstdin needs
287 a minus to specify standard input, otherwise the value is "".
288
289cpprun (cppstdin.U):
290 This variable contains the command which will invoke a C preprocessor
291 on standard input and put the output to stdout. It is guaranteed not
292 to be a wrapper and may be a null string if no preprocessor can be
293 made directly available. This preprocessor might be different from the
294 one used by the C compiler. Don't forget to append cpplast after the
295 preprocessor options.
296
297cppstdin (cppstdin.U):
298 This variable contains the command which will invoke the C
299 preprocessor on standard input and put the output to stdout.
300 It is primarily used by other Configure units that ask about
301 preprocessor symbols.
302
303cppsymbols (Cppsym.U):
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304 The variable contains the symbols during a compilation
305 that includes stdio.h.
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306 The list is a space-separated list of symbol=value tokens.
307
308crosscompile (crosscompile.U):
309 This variable conditionally defines the CROSSCOMPILE symbol
310 which signifies that the build process is be a cross-compilation.
311 This is normally set by hints files or from Configure command line.
312
313cryptlib (d_crypt.U):
314 This variable holds -lcrypt or the path to a libcrypt.a archive if
315 the crypt() function is not defined in the standard C library. It is
316 up to the Makefile to use this.
317
318csh (Loc.U):
5bf26616 319 This variable is used internally by Configure to determine the
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320 full pathname (if any) of the csh program. After Configure runs,
321 the value is reset to a plain "csh" and is not useful.
322
323d_access (d_access.U):
324 This variable conditionally defines HAS_ACCESS if the access() system
325 call is available to check for access permissions using real IDs.
326
327d_accessx (d_accessx.U):
328 This variable conditionally defines the HAS_ACCESSX symbol, which
329 indicates to the C program that the accessx() routine is available.
330
331d_alarm (d_alarm.U):
332 This variable conditionally defines the HAS_ALARM symbol, which
333 indicates to the C program that the alarm() routine is available.
334
335d_archlib (archlib.U):
336 This variable conditionally defines ARCHLIB to hold the pathname
337 of architecture-dependent library files for $package. If
338 $archlib is the same as $privlib, then this is set to undef.
339
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340d_atolf (atolf.U):
341 This variable conditionally defines the HAS_ATOLF symbol, which
342 indicates to the C program that the atolf() routine is available.
343
344d_atoll (atoll.U):
345 This variable conditionally defines the HAS_ATOLL symbol, which
346 indicates to the C program that the atoll() routine is available.
347
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348d_attribut (d_attribut.U):
349 This variable conditionally defines HASATTRIBUTE, which
350 indicates the C compiler can check for function attributes,
351 such as printf formats.
352
353d_bcmp (d_bcmp.U):
354 This variable conditionally defines the HAS_BCMP symbol if
355 the bcmp() routine is available to compare strings.
356
357d_bcopy (d_bcopy.U):
358 This variable conditionally defines the HAS_BCOPY symbol if
359 the bcopy() routine is available to copy strings.
360
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361d_bincompat5005 (bincompat5005.U):
362 This variable conditionally defines BINCOMPAT5005 so that embed.h
363 can take special action if Perl 5.006 should be binary-compatible
364 with Perl 5.005. This is impossible for builds that use features
365 like threads and multiplicity it is always $undef for those versions.
366
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367d_bsd (Guess.U):
368 This symbol conditionally defines the symbol BSD when running on a
369 BSD system.
370
371d_bsdgetpgrp (d_getpgrp.U):
372 This variable conditionally defines USE_BSD_GETPGRP if
373 getpgrp needs one arguments whereas USG one needs none.
374
375d_bsdsetpgrp (d_setpgrp.U):
376 This variable conditionally defines USE_BSD_SETPGRP if
377 setpgrp needs two arguments whereas USG one needs none.
378 See also d_setpgid for a POSIX interface.
379
380d_bzero (d_bzero.U):
381 This variable conditionally defines the HAS_BZERO symbol if
382 the bzero() routine is available to set memory to 0.
383
384d_casti32 (d_casti32.U):
385 This variable conditionally defines CASTI32, which indicates
386 whether the C compiler can cast large floats to 32-bit ints.
387
388d_castneg (d_castneg.U):
389 This variable conditionally defines CASTNEG, which indicates
390 wether the C compiler can cast negative float to unsigned.
391
392d_charvspr (d_vprintf.U):
393 This variable conditionally defines CHARVSPRINTF if this system
394 has vsprintf returning type (char*). The trend seems to be to
395 declare it as "int vsprintf()".
396
397d_chown (d_chown.U):
398 This variable conditionally defines the HAS_CHOWN symbol, which
399 indicates to the C program that the chown() routine is available.
400
401d_chroot (d_chroot.U):
402 This variable conditionally defines the HAS_CHROOT symbol, which
403 indicates to the C program that the chroot() routine is available.
404
405d_chsize (d_chsize.U):
406 This variable conditionally defines the CHSIZE symbol, which
407 indicates to the C program that the chsize() routine is available
408 to truncate files. You might need a -lx to get this routine.
409
410d_closedir (d_closedir.U):
411 This variable conditionally defines HAS_CLOSEDIR if closedir() is
412 available.
413
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414d_const (d_const.U):
415 This variable conditionally defines the HASCONST symbol, which
416 indicates to the C program that this C compiler knows about the
417 const type.
418
419d_crypt (d_crypt.U):
420 This variable conditionally defines the CRYPT symbol, which
421 indicates to the C program that the crypt() routine is available
422 to encrypt passwords and the like.
423
424d_csh (d_csh.U):
425 This variable conditionally defines the CSH symbol, which
426 indicates to the C program that the C-shell exists.
427
428d_cuserid (d_cuserid.U):
429 This variable conditionally defines the HAS_CUSERID symbol, which
430 indicates to the C program that the cuserid() routine is available
431 to get character login names.
432
433d_dbl_dig (d_dbl_dig.U):
434 This variable conditionally defines d_dbl_dig if this system's
435 header files provide DBL_DIG, which is the number of significant
436 digits in a double precision number.
437
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438d_difftime (d_difftime.U):
439 This variable conditionally defines the HAS_DIFFTIME symbol, which
440 indicates to the C program that the difftime() routine is available.
441
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442d_dirnamlen (i_dirent.U):
443 This variable conditionally defines DIRNAMLEN, which indicates
444 to the C program that the length of directory entry names is
445 provided by a d_namelen field.
446
447d_dlerror (d_dlerror.U):
448 This variable conditionally defines the HAS_DLERROR symbol, which
449 indicates to the C program that the dlerror() routine is available.
450
451d_dlopen (d_dlopen.U):
452 This variable conditionally defines the HAS_DLOPEN symbol, which
453 indicates to the C program that the dlopen() routine is available.
454
455d_dlsymun (d_dlsymun.U):
456 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
457 indicates that we need to prepend an underscore to the symbol
458 name before calling dlsym().
459
460d_dosuid (d_dosuid.U):
461 This variable conditionally defines the symbol DOSUID, which
462 tells the C program that it should insert setuid emulation code
463 on hosts which have setuid #! scripts disabled.
464
465d_drand48proto (d_drand48proto.U):
466 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
467 which indicates to the C program that the system provides
468 a prototype for the drand48() function. Otherwise, it is
469 up to the program to supply one.
470
471d_dup2 (d_dup2.U):
472 This variable conditionally defines HAS_DUP2 if dup2() is
473 available to duplicate file descriptors.
474
475d_eaccess (d_eaccess.U):
476 This variable conditionally defines the HAS_EACCESS symbol, which
477 indicates to the C program that the eaccess() routine is available.
478
479d_endgrent (d_endgrent.U):
480 This variable conditionally defines the HAS_ENDGRENT symbol, which
481 indicates to the C program that the endgrent() routine is available
482 for sequential access of the group database.
483
484d_endhent (d_endhent.U):
485 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
486 available to close whatever was being used for host queries.
487
488d_endnent (d_endnent.U):
489 This variable conditionally defines HAS_ENDNETENT if endnetent() is
490 available to close whatever was being used for network queries.
491
492d_endpent (d_endpent.U):
493 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
494 available to close whatever was being used for protocol queries.
495
496d_endpwent (d_endpwent.U):
497 This variable conditionally defines the HAS_ENDPWENT symbol, which
498 indicates to the C program that the endpwent() routine is available
499 for sequential access of the passwd database.
500
501d_endsent (d_endsent.U):
502 This variable conditionally defines HAS_ENDSERVENT if endservent() is
503 available to close whatever was being used for service queries.
504
505d_endspent (d_endspent.U):
506 This variable conditionally defines HAS_ENDSPENT if endspent() is
507 available to finalize the scan of SysV shadow password entries.
508
509d_eofnblk (nblock_io.U):
510 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
511 when reading from a non-blocking I/O source.
512
513d_eunice (Guess.U):
514 This variable conditionally defines the symbols EUNICE and VAX, which
515 alerts the C program that it must deal with ideosyncracies of VMS.
516
517d_fchmod (d_fchmod.U):
518 This variable conditionally defines the HAS_FCHMOD symbol, which
519 indicates to the C program that the fchmod() routine is available
520 to change mode of opened files.
521
522d_fchown (d_fchown.U):
523 This variable conditionally defines the HAS_FCHOWN symbol, which
524 indicates to the C program that the fchown() routine is available
525 to change ownership of opened files.
526
527d_fcntl (d_fcntl.U):
528 This variable conditionally defines the HAS_FCNTL symbol, and indicates
529 whether the fcntl() function exists
530
531d_fd_macros (d_fd_set.U):
532 This variable contains the eventual value of the HAS_FD_MACROS symbol,
533 which indicates if your C compiler knows about the macros which
534 manipulate an fd_set.
535
536d_fd_set (d_fd_set.U):
537 This variable contains the eventual value of the HAS_FD_SET symbol,
538 which indicates if your C compiler knows about the fd_set typedef.
539
540d_fds_bits (d_fd_set.U):
541 This variable contains the eventual value of the HAS_FDS_BITS symbol,
542 which indicates if your fd_set typedef contains the fds_bits member.
543 If you have an fd_set typedef, but the dweebs who installed it did
544 a half-fast job and neglected to provide the macros to manipulate
545 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
546
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547d_fgetpos (d_fgetpos.U):
548 This variable conditionally defines HAS_FGETPOS if fgetpos() is
549 available to get the file position indicator.
550
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551d_flexfnam (d_flexfnam.U):
552 This variable conditionally defines the FLEXFILENAMES symbol, which
553 indicates that the system supports filenames longer than 14 characters.
554
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555d_flock (d_flock.U):
556 This variable conditionally defines HAS_FLOCK if flock() is
557 available to do file locking.
558
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559d_fork (d_fork.U):
560 This variable conditionally defines the HAS_FORK symbol, which
561 indicates to the C program that the fork() routine is available.
562
563d_fpathconf (d_pathconf.U):
564 This variable conditionally defines the HAS_FPATHCONF symbol, which
565 indicates to the C program that the pathconf() routine is available
566 to determine file-system related limits and options associated
567 with a given open file descriptor.
568
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569d_fpos64_t (io64.U):
570 This symbol will be defined if the C compiler supports fpos64_t.
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ad27e871 572d_fs_data_s (d_fs_data_s.U):
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573 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
574 which indicates that the struct fs_data is supported.
575
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576d_fseeko (d_fseeko.U):
577 This variable conditionally defines the HAS_FSEEKO symbol, which
578 indicates to the C program that the fseeko() routine is available.
579
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580d_fsetpos (d_fsetpos.U):
581 This variable conditionally defines HAS_FSETPOS if fsetpos() is
582 available to set the file position indicator.
583
0545a864 584d_fstatfs (d_fstatfs.U):
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585 This variable conditionally defines the HAS_FSTATFS symbol, which
586 indicates to the C program that the fstatfs() routine is available.
587
588d_fstatvfs (d_statvfs.U):
589 This variable conditionally defines the HAS_FSTATVFS symbol, which
590 indicates to the C program that the fstatvfs() routine is available.
591
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592d_ftello (d_ftello.U):
593 This variable conditionally defines the HAS_FTELLO symbol, which
594 indicates to the C program that the ftello() routine is available.
595
596d_ftime (d_ftime.U):
597 This variable conditionally defines the HAS_FTIME symbol, which indicates
598 that the ftime() routine exists. The ftime() routine is basically
599 a sub-second accuracy clock.
600
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601d_Gconvert (d_gconvert.U):
602 This variable holds what Gconvert is defined as to convert
603 floating point numbers into strings. It could be 'gconvert'
604 or a more complex macro emulating gconvert with gcvt() or sprintf.
605 Possible values are:
606 d_Gconvert='gconvert((x),(n),(t),(b))'
607 d_Gconvert='gcvt((x),(n),(b))'
608 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
609
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610d_getcwd (d_getcwd.U):
611 This variable conditionally defines the HAS_GETCWD symbol, which
612 indicates to the C program that the getcwd() routine is available
613 to get the current working directory.
614
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615d_getgrent (d_getgrent.U):
616 This variable conditionally defines the HAS_GETGRENT symbol, which
617 indicates to the C program that the getgrent() routine is available
618 for sequential access of the group database.
619
620d_getgrps (d_getgrps.U):
621 This variable conditionally defines the HAS_GETGROUPS symbol, which
622 indicates to the C program that the getgroups() routine is available
623 to get the list of process groups.
624
625d_gethbyaddr (d_gethbyad.U):
626 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
627 indicates to the C program that the gethostbyaddr() routine is available
628 to look up hosts by their IP addresses.
629
630d_gethbyname (d_gethbynm.U):
631 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
632 indicates to the C program that the gethostbyname() routine is available
633 to look up host names in some data base or other.
634
635d_gethent (d_gethent.U):
636 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
637 available to look up host names in some data base or another.
638
639d_gethname (d_gethname.U):
640 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
641 indicates to the C program that the gethostname() routine may be
642 used to derive the host name.
643
644d_gethostprotos (d_gethostprotos.U):
645 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
646 which indicates to the C program that <netdb.h> supplies
647 prototypes for the various gethost*() functions.
648 See also netdbtype.U for probing for various netdb types.
649
650d_getlogin (d_getlogin.U):
651 This variable conditionally defines the HAS_GETLOGIN symbol, which
652 indicates to the C program that the getlogin() routine is available
653 to get the login name.
654
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655d_getmnt (d_getmnt.U):
656 This variable conditionally defines the HAS_GETMNT symbol, which
657 indicates to the C program that the getmnt() routine is available
658 to retrieve one or more mount info blocks by filename.
659
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660d_getmntent (d_getmntent.U):
661 This variable conditionally defines the HAS_GETMNTENT symbol, which
662 indicates to the C program that the getmntent() routine is available
0617aed7 663 to iterate through mounted files to get their mount info.
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664
665d_getnbyaddr (d_getnbyad.U):
666 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
667 indicates to the C program that the getnetbyaddr() routine is available
668 to look up networks by their IP addresses.
669
670d_getnbyname (d_getnbynm.U):
671 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
672 indicates to the C program that the getnetbyname() routine is available
673 to look up networks by their names.
674
675d_getnent (d_getnent.U):
676 This variable conditionally defines HAS_GETNETENT if getnetent() is
677 available to look up network names in some data base or another.
678
679d_getnetprotos (d_getnetprotos.U):
680 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
681 which indicates to the C program that <netdb.h> supplies
682 prototypes for the various getnet*() functions.
683 See also netdbtype.U for probing for various netdb types.
684
685d_getpbyname (d_getprotby.U):
686 This variable conditionally defines the HAS_GETPROTOBYNAME
687 symbol, which indicates to the C program that the
688 getprotobyname() routine is available to look up protocols
689 by their name.
690
691d_getpbynumber (d_getprotby.U):
692 This variable conditionally defines the HAS_GETPROTOBYNUMBER
693 symbol, which indicates to the C program that the
694 getprotobynumber() routine is available to look up protocols
695 by their number.
696
697d_getpent (d_getpent.U):
698 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
699 available to look up protocols in some data base or another.
700
701d_getpgid (d_getpgid.U):
702 This variable conditionally defines the HAS_GETPGID symbol, which
703 indicates to the C program that the getpgid(pid) function
704 is available to get the process group id.
705
706d_getpgrp2 (d_getpgrp2.U):
707 This variable conditionally defines the HAS_GETPGRP2 symbol, which
708 indicates to the C program that the getpgrp2() (as in DG/UX) routine
709 is available to get the current process group.
710
711d_getpgrp (d_getpgrp.U):
712 This variable conditionally defines HAS_GETPGRP if getpgrp() is
713 available to get the current process group.
714
715d_getppid (d_getppid.U):
716 This variable conditionally defines the HAS_GETPPID symbol, which
717 indicates to the C program that the getppid() routine is available
718 to get the parent process ID.
719
720d_getprior (d_getprior.U):
721 This variable conditionally defines HAS_GETPRIORITY if getpriority()
722 is available to get a process's priority.
723
724d_getprotoprotos (d_getprotoprotos.U):
725 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
726 which indicates to the C program that <netdb.h> supplies
727 prototypes for the various getproto*() functions.
728 See also netdbtype.U for probing for various netdb types.
729
730d_getpwent (d_getpwent.U):
731 This variable conditionally defines the HAS_GETPWENT symbol, which
732 indicates to the C program that the getpwent() routine is available
733 for sequential access of the passwd database.
734
735d_getsbyname (d_getsrvby.U):
736 This variable conditionally defines the HAS_GETSERVBYNAME
737 symbol, which indicates to the C program that the
738 getservbyname() routine is available to look up services
739 by their name.
740
741d_getsbyport (d_getsrvby.U):
742 This variable conditionally defines the HAS_GETSERVBYPORT
743 symbol, which indicates to the C program that the
744 getservbyport() routine is available to look up services
745 by their port.
746
747d_getsent (d_getsent.U):
748 This variable conditionally defines HAS_GETSERVENT if getservent() is
749 available to look up network services in some data base or another.
750
751d_getservprotos (d_getservprotos.U):
752 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
753 which indicates to the C program that <netdb.h> supplies
754 prototypes for the various getserv*() functions.
755 See also netdbtype.U for probing for various netdb types.
756
757d_getspent (d_getspent.U):
758 This variable conditionally defines HAS_GETSPENT if getspent() is
759 available to retrieve SysV shadow password entries sequentially.
760
761d_getspnam (d_getspnam.U):
762 This variable conditionally defines HAS_GETSPNAM if getspnam() is
763 available to retrieve SysV shadow password entries by name.
764
765d_gettimeod (d_ftime.U):
766 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
767 indicates that the gettimeofday() system call exists (to obtain a
768 sub-second accuracy clock). You should probably include <sys/resource.h>.
769
770d_gnulibc (d_gnulibc.U):
771 Defined if we're dealing with the GNU C Library.
772
773d_grpasswd (i_grp.U):
774 This variable conditionally defines GRPASSWD, which indicates
775 that struct group in <grp.h> contains gr_passwd.
776
777d_hasmntopt (d_hasmntopt.U):
778 This variable conditionally defines the HAS_HASMNTOPT symbol, which
779 indicates to the C program that the hasmntopt() routine is available
780 to query the mount options of file systems.
781
782d_htonl (d_htonl.U):
783 This variable conditionally defines HAS_HTONL if htonl() and its
784 friends are available to do network order byte swapping.
785
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786d_iconv (d_iconv.U):
787 This variable conditionally defines the HAS_ICONV symbol, which
788 indicates to the C program that the iconv() routine is available.
789
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790d_index (d_strchr.U):
791 This variable conditionally defines HAS_INDEX if index() and
792 rindex() are available for string searching.
793
794d_inetaton (d_inetaton.U):
795 This variable conditionally defines the HAS_INET_ATON symbol, which
796 indicates to the C program that the inet_aton() function is available
797 to parse IP address "dotted-quad" strings.
798
13b3f787 799d_int64_t (d_int64_t.U):
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800 This symbol will be defined if the C compiler supports int64_t.
801
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802d_isascii (d_isascii.U):
803 This variable conditionally defines the HAS_ISASCII constant,
804 which indicates to the C program that isascii() is available.
805
806d_killpg (d_killpg.U):
807 This variable conditionally defines the HAS_KILLPG symbol, which
808 indicates to the C program that the killpg() routine is available
809 to kill process groups.
810
811d_lchown (d_lchown.U):
812 This variable conditionally defines the HAS_LCHOWN symbol, which
813 indicates to the C program that the lchown() routine is available
814 to operate on a symbolic link (instead of following the link).
815
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816d_ldbl_dig (d_ldbl_dig.U):
817 This variable conditionally defines d_ldbl_dig if this system's
818 header files provide LDBL_DIG, which is the number of significant
819 digits in a long double precision number.
820
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821d_link (d_link.U):
822 This variable conditionally defines HAS_LINK if link() is
823 available to create hard links.
824
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825d_locconv (d_locconv.U):
826 This variable conditionally defines HAS_LOCALECONV if localeconv() is
827 available for numeric and monetary formatting conventions.
828
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829d_lockf (d_lockf.U):
830 This variable conditionally defines HAS_LOCKF if lockf() is
831 available to do file locking.
832
833d_longdbl (d_longdbl.U):
834 This variable conditionally defines HAS_LONG_DOUBLE if
835 the long double type is supported.
836
837d_longlong (d_longlong.U):
838 This variable conditionally defines HAS_LONG_LONG if
839 the long long type is supported.
840
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841d_lstat (d_lstat.U):
842 This variable conditionally defines HAS_LSTAT if lstat() is
843 available to do file stats on symbolic links.
844
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845d_mblen (d_mblen.U):
846 This variable conditionally defines the HAS_MBLEN symbol, which
847 indicates to the C program that the mblen() routine is available
848 to find the number of bytes in a multibye character.
849
850d_mbstowcs (d_mbstowcs.U):
851 This variable conditionally defines the HAS_MBSTOWCS symbol, which
852 indicates to the C program that the mbstowcs() routine is available
853 to convert a multibyte string into a wide character string.
854
855d_mbtowc (d_mbtowc.U):
856 This variable conditionally defines the HAS_MBTOWC symbol, which
857 indicates to the C program that the mbtowc() routine is available
858 to convert multibyte to a wide character.
859
860d_memchr (d_memchr.U):
861 This variable conditionally defines the HAS_MEMCHR symbol, which
862 indicates to the C program that the memchr() routine is available
863 to locate characters within a C string.
864
865d_memcmp (d_memcmp.U):
866 This variable conditionally defines the HAS_MEMCMP symbol, which
867 indicates to the C program that the memcmp() routine is available
868 to compare blocks of memory.
869
870d_memcpy (d_memcpy.U):
871 This variable conditionally defines the HAS_MEMCPY symbol, which
872 indicates to the C program that the memcpy() routine is available
873 to copy blocks of memory.
874
875d_memmove (d_memmove.U):
876 This variable conditionally defines the HAS_MEMMOVE symbol, which
877 indicates to the C program that the memmove() routine is available
878 to copy potentatially overlapping blocks of memory.
879
880d_memset (d_memset.U):
881 This variable conditionally defines the HAS_MEMSET symbol, which
882 indicates to the C program that the memset() routine is available
883 to set blocks of memory.
884
885d_mkdir (d_mkdir.U):
886 This variable conditionally defines the HAS_MKDIR symbol, which
887 indicates to the C program that the mkdir() routine is available
888 to create directories..
889
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890d_mkdtemp (d_mkdtemp.U):
891 This variable conditionally defines the HAS_MKDTEMP symbol, which
892 indicates to the C program that the mkdtemp() routine is available
893 to exclusively create a uniquely named temporary directory.
894
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895d_mkfifo (d_mkfifo.U):
896 This variable conditionally defines the HAS_MKFIFO symbol, which
897 indicates to the C program that the mkfifo() routine is available.
898
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899d_mkstemp (d_mkstemp.U):
900 This variable conditionally defines the HAS_MKSTEMP symbol, which
901 indicates to the C program that the mkstemp() routine is available
902 to exclusively create and open a uniquely named temporary file.
903
904d_mkstemps (d_mkstemps.U):
905 This variable conditionally defines the HAS_MKSTEMPS symbol, which
906 indicates to the C program that the mkstemps() routine is available
907 to exclusively create and open a uniquely named (with a suffix)
908 temporary file.
909
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910d_mktime (d_mktime.U):
911 This variable conditionally defines the HAS_MKTIME symbol, which
912 indicates to the C program that the mktime() routine is available.
913
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914d_mmap (d_mmap.U):
915 This variable conditionally defines HAS_MMAP if mmap() is
916 available to map a file into memory.
917
918d_mprotect (d_mprotect.U):
919 This variable conditionally defines HAS_MPROTECT if mprotect() is
920 available to modify the access protection of a memory mapped file.
921
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922d_msg (d_msg.U):
923 This variable conditionally defines the HAS_MSG symbol, which
924 indicates that the entire msg*(2) library is present.
925
926d_msg_ctrunc (d_socket.U):
927 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
928 which indicates that the MSG_CTRUNC is available. #ifdef is
929 not enough because it may be an enum, glibc has been known to do this.
930
931d_msg_dontroute (d_socket.U):
932 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
933 which indicates that the MSG_DONTROUTE is available. #ifdef is
934 not enough because it may be an enum, glibc has been known to do this.
935
936d_msg_oob (d_socket.U):
937 This variable conditionally defines the HAS_MSG_OOB symbol,
938 which indicates that the MSG_OOB is available. #ifdef is
939 not enough because it may be an enum, glibc has been known to do this.
940
941d_msg_peek (d_socket.U):
942 This variable conditionally defines the HAS_MSG_PEEK symbol,
943 which indicates that the MSG_PEEK is available. #ifdef is
944 not enough because it may be an enum, glibc has been known to do this.
945
946d_msg_proxy (d_socket.U):
947 This variable conditionally defines the HAS_MSG_PROXY symbol,
948 which indicates that the MSG_PROXY is available. #ifdef is
949 not enough because it may be an enum, glibc has been known to do this.
950
951d_msgctl (d_msgctl.U):
952 This variable conditionally defines the HAS_MSGCTL symbol, which
953 indicates to the C program that the msgctl() routine is available.
954
955d_msgget (d_msgget.U):
956 This variable conditionally defines the HAS_MSGGET symbol, which
957 indicates to the C program that the msgget() routine is available.
958
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959d_msgrcv (d_msgrcv.U):
960 This variable conditionally defines the HAS_MSGRCV symbol, which
961 indicates to the C program that the msgrcv() routine is available.
962
963d_msgsnd (d_msgsnd.U):
964 This variable conditionally defines the HAS_MSGSND symbol, which
965 indicates to the C program that the msgsnd() routine is available.
966
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967d_msync (d_msync.U):
968 This variable conditionally defines HAS_MSYNC if msync() is
969 available to synchronize a mapped file.
970
971d_munmap (d_munmap.U):
972 This variable conditionally defines HAS_MUNMAP if munmap() is
973 available to unmap a region mapped by mmap().
974
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975d_mymalloc (mallocsrc.U):
976 This variable conditionally defines MYMALLOC in case other parts
977 of the source want to take special action if MYMALLOC is used.
978 This may include different sorts of profiling or error detection.
979
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980d_nice (d_nice.U):
981 This variable conditionally defines the HAS_NICE symbol, which
982 indicates to the C program that the nice() routine is available.
983
78691af5 984d_nv_preserves_uv (perlxv.U):
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985 This variable indicates whether a variable of type nvtype
986 can preserve all the bits a variable of type uvtype.
987
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988d_off64_t (io64.U):
989 This symbol will be defined if the C compiler supports off64_t.
990
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991d_old_pthread_create_joinable (d_pthrattrj.U):
992 This variable conditionally defines pthread_create_joinable.
993 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
994
995d_oldpthreads (usethreads.U):
996 This variable conditionally defines the OLD_PTHREADS_API symbol,
997 and indicates that Perl should be built to use the old
8c09e4ca 998 draft POSIX threads API. This is only potentially meaningful if
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999 usethreads is set.
1000
1001d_oldsock (d_socket.U):
1002 This variable conditionally defines the OLDSOCKET symbol, which
1003 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1004
1005d_open3 (d_open3.U):
1006 This variable conditionally defines the HAS_OPEN3 manifest constant,
1007 which indicates to the C program that the 3 argument version of
1008 the open(2) function is available.
1009
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1010d_pathconf (d_pathconf.U):
1011 This variable conditionally defines the HAS_PATHCONF symbol, which
1012 indicates to the C program that the pathconf() routine is available
1013 to determine file-system related limits and options associated
1014 with a given filename.
1015
1016d_pause (d_pause.U):
1017 This variable conditionally defines the HAS_PAUSE symbol, which
1018 indicates to the C program that the pause() routine is available
1019 to suspend a process until a signal is received.
1020
1021d_phostname (d_gethname.U):
1022 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1023 contains the shell command which, when fed to popen(), may be
1024 used to derive the host name.
1025
1026d_pipe (d_pipe.U):
1027 This variable conditionally defines the HAS_PIPE symbol, which
1028 indicates to the C program that the pipe() routine is available
1029 to create an inter-process channel.
1030
1031d_poll (d_poll.U):
1032 This variable conditionally defines the HAS_POLL symbol, which
1033 indicates to the C program that the poll() routine is available
1034 to poll active file descriptors.
1035
1036d_portable (d_portable.U):
1037 This variable conditionally defines the PORTABLE symbol, which
1038 indicates to the C program that it should not assume that it is
1039 running on the machine it was compiled on.
1040
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1041d_PRId64 (quadfio.U):
1042 This variable conditionally defines the PERL_PRId64 symbol, which
1043 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1044
1045d_PRIeldbl (longdblfio.U):
1046 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1047 indiciates that stdio has a symbol to print long doubles.
1048
1049d_PRIEldbl (longdblfio.U):
1050 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1051 indiciates that stdio has a symbol to print long doubles.
1052
1053d_PRIfldbl (longdblfio.U):
1054 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1055 indiciates that stdio has a symbol to print long doubles.
1056
1057d_PRIFldbl (longdblfio.U):
1058 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1059 indiciates that stdio has a symbol to print long doubles.
1060
1061d_PRIgldbl (longdblfio.U):
1062 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1063 indiciates that stdio has a symbol to print long doubles.
1064
1065d_PRIGldbl (longdblfio.U):
1066 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1067 indiciates that stdio has a symbol to print long doubles.
1068
1069d_PRIi64 (quadfio.U):
1070 This variable conditionally defines the PERL_PRIi64 symbol, which
1071 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1072
1073d_PRIo64 (quadfio.U):
1074 This variable conditionally defines the PERL_PRIo64 symbol, which
1075 indiciates that stdio has a symbol to print 64-bit octal numbers.
1076
1077d_PRIu64 (quadfio.U):
1078 This variable conditionally defines the PERL_PRIu64 symbol, which
1079 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1080 numbers.
1081
1082d_PRIx64 (quadfio.U):
1083 This variable conditionally defines the PERL_PRIx64 symbol, which
1084 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1085
1086d_PRIX64 (quadfio.U):
1087 This variable conditionally defines the PERL_PRIX64 symbol, which
1088 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1089
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1090d_pthread_yield (d_pthread_y.U):
1091 This variable conditionally defines the HAS_PTHREAD_YIELD
1092 symbol if the pthread_yield routine is available to yield
1093 the execution of the current thread.
1094
1095d_pwage (i_pwd.U):
1096 This variable conditionally defines PWAGE, which indicates
1097 that struct passwd contains pw_age.
1098
1099d_pwchange (i_pwd.U):
1100 This variable conditionally defines PWCHANGE, which indicates
1101 that struct passwd contains pw_change.
1102
1103d_pwclass (i_pwd.U):
1104 This variable conditionally defines PWCLASS, which indicates
1105 that struct passwd contains pw_class.
1106
1107d_pwcomment (i_pwd.U):
1108 This variable conditionally defines PWCOMMENT, which indicates
1109 that struct passwd contains pw_comment.
1110
1111d_pwexpire (i_pwd.U):
1112 This variable conditionally defines PWEXPIRE, which indicates
1113 that struct passwd contains pw_expire.
1114
1115d_pwgecos (i_pwd.U):
1116 This variable conditionally defines PWGECOS, which indicates
1117 that struct passwd contains pw_gecos.
1118
1119d_pwpasswd (i_pwd.U):
1120 This variable conditionally defines PWPASSWD, which indicates
1121 that struct passwd contains pw_passwd.
1122
1123d_pwquota (i_pwd.U):
1124 This variable conditionally defines PWQUOTA, which indicates
1125 that struct passwd contains pw_quota.
1126
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1127d_quad (quadtype.U):
1128 This variable, if defined, tells that there's a 64-bit integer type,
1129 quadtype.
1130
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1131d_readdir (d_readdir.U):
1132 This variable conditionally defines HAS_READDIR if readdir() is
1133 available to read directory entries.
1134
1135d_readlink (d_readlink.U):
1136 This variable conditionally defines the HAS_READLINK symbol, which
1137 indicates to the C program that the readlink() routine is available
1138 to read the value of a symbolic link.
1139
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1140d_rename (d_rename.U):
1141 This variable conditionally defines the HAS_RENAME symbol, which
1142 indicates to the C program that the rename() routine is available
1143 to rename files.
1144
1145d_rewinddir (d_readdir.U):
1146 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1147 available.
1148
1149d_rmdir (d_rmdir.U):
1150 This variable conditionally defines HAS_RMDIR if rmdir() is
1151 available to remove directories.
1152
1153d_safebcpy (d_safebcpy.U):
1154 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1155 the bcopy() routine can do overlapping copies.
1156
1157d_safemcpy (d_safemcpy.U):
1158 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1159 the memcpy() routine can do overlapping copies.
1160
1161d_sanemcmp (d_sanemcmp.U):
1162 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1163 the memcpy() routine is available and can be used to compare relative
1164 magnitudes of chars with their high bits set.
1165
1166d_sched_yield (d_pthread_y.U):
1167 This variable conditionally defines the HAS_SCHED_YIELD
1168 symbol if the sched_yield routine is available to yield
1169 the execution of the current thread.
1170
1171d_scm_rights (d_socket.U):
1172 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1173 which indicates that the SCM_RIGHTS is available. #ifdef is
1174 not enough because it may be an enum, glibc has been known to do this.
1175
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1176d_seekdir (d_readdir.U):
1177 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1178 available.
1179
1180d_select (d_select.U):
1181 This variable conditionally defines HAS_SELECT if select() is
1182 available to select active file descriptors. A <sys/time.h>
1183 inclusion may be necessary for the timeout field.
1184
1185d_sem (d_sem.U):
1186 This variable conditionally defines the HAS_SEM symbol, which
1187 indicates that the entire sem*(2) library is present.
1188
1189d_semctl (d_semctl.U):
1190 This variable conditionally defines the HAS_SEMCTL symbol, which
1191 indicates to the C program that the semctl() routine is available.
1192
1193d_semctl_semid_ds (d_union_semun.U):
1194 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1195 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1196
1197d_semctl_semun (d_union_semun.U):
1198 This variable conditionally defines USE_SEMCTL_SEMUN, which
1199 indicates that union semun is to be used for semctl IPC_STAT.
1200
1201d_semget (d_semget.U):
1202 This variable conditionally defines the HAS_SEMGET symbol, which
1203 indicates to the C program that the semget() routine is available.
1204
1205d_semop (d_semop.U):
1206 This variable conditionally defines the HAS_SEMOP symbol, which
1207 indicates to the C program that the semop() routine is available.
1208
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1209d_setegid (d_setegid.U):
1210 This variable conditionally defines the HAS_SETEGID symbol, which
1211 indicates to the C program that the setegid() routine is available
1212 to change the effective gid of the current program.
1213
1214d_seteuid (d_seteuid.U):
1215 This variable conditionally defines the HAS_SETEUID symbol, which
1216 indicates to the C program that the seteuid() routine is available
1217 to change the effective uid of the current program.
1218
1219d_setgrent (d_setgrent.U):
1220 This variable conditionally defines the HAS_SETGRENT symbol, which
1221 indicates to the C program that the setgrent() routine is available
1222 for initializing sequential access to the group database.
1223
1224d_setgrps (d_setgrps.U):
1225 This variable conditionally defines the HAS_SETGROUPS symbol, which
1226 indicates to the C program that the setgroups() routine is available
1227 to set the list of process groups.
1228
1229d_sethent (d_sethent.U):
1230 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1231 available.
1232
1233d_setlinebuf (d_setlnbuf.U):
1234 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1235 indicates to the C program that the setlinebuf() routine is available
1236 to change stderr or stdout from block-buffered or unbuffered to a
1237 line-buffered mode.
1238
1239d_setlocale (d_setlocale.U):
1240 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1241 available to handle locale-specific ctype implementations.
1242
1243d_setnent (d_setnent.U):
1244 This variable conditionally defines HAS_SETNETENT if setnetent() is
1245 available.
1246
1247d_setpent (d_setpent.U):
1248 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1249 available.
1250
1251d_setpgid (d_setpgid.U):
1252 This variable conditionally defines the HAS_SETPGID symbol if the
1253 setpgid(pid, gpid) function is available to set process group ID.
1254
1255d_setpgrp2 (d_setpgrp2.U):
1256 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1257 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1258 is available to set the current process group.
1259
1260d_setpgrp (d_setpgrp.U):
1261 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1262 available to set the current process group.
1263
1264d_setprior (d_setprior.U):
1265 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1266 is available to set a process's priority.
1267
1268d_setpwent (d_setpwent.U):
1269 This variable conditionally defines the HAS_SETPWENT symbol, which
1270 indicates to the C program that the setpwent() routine is available
1271 for initializing sequential access to the passwd database.
1272
1273d_setregid (d_setregid.U):
1274 This variable conditionally defines HAS_SETREGID if setregid() is
1275 available to change the real and effective gid of the current
1276 process.
1277
1278d_setresgid (d_setregid.U):
1279 This variable conditionally defines HAS_SETRESGID if setresgid() is
1280 available to change the real, effective and saved gid of the current
1281 process.
1282
1283d_setresuid (d_setreuid.U):
1284 This variable conditionally defines HAS_SETREUID if setresuid() is
1285 available to change the real, effective and saved uid of the current
1286 process.
1287
1288d_setreuid (d_setreuid.U):
1289 This variable conditionally defines HAS_SETREUID if setreuid() is
1290 available to change the real and effective uid of the current
1291 process.
1292
1293d_setrgid (d_setrgid.U):
1294 This variable conditionally defines the HAS_SETRGID symbol, which
1295 indicates to the C program that the setrgid() routine is available
1296 to change the real gid of the current program.
1297
1298d_setruid (d_setruid.U):
1299 This variable conditionally defines the HAS_SETRUID symbol, which
1300 indicates to the C program that the setruid() routine is available
1301 to change the real uid of the current program.
1302
1303d_setsent (d_setsent.U):
1304 This variable conditionally defines HAS_SETSERVENT if setservent() is
1305 available.
1306
1307d_setsid (d_setsid.U):
1308 This variable conditionally defines HAS_SETSID if setsid() is
1309 available to set the process group ID.
1310
1311d_setspent (d_setspent.U):
1312 This variable conditionally defines HAS_SETSPENT if setspent() is
1313 available to initialize the scan of SysV shadow password entries.
1314
1315d_setvbuf (d_setvbuf.U):
1316 This variable conditionally defines the HAS_SETVBUF symbol, which
1317 indicates to the C program that the setvbuf() routine is available
1318 to change buffering on an open stdio stream.
1319
1320d_sfio (d_sfio.U):
1321 This variable conditionally defines the USE_SFIO symbol,
1322 and indicates whether sfio is available (and should be used).
1323
1324d_shm (d_shm.U):
1325 This variable conditionally defines the HAS_SHM symbol, which
1326 indicates that the entire shm*(2) library is present.
1327
1328d_shmat (d_shmat.U):
1329 This variable conditionally defines the HAS_SHMAT symbol, which
1330 indicates to the C program that the shmat() routine is available.
1331
1332d_shmatprototype (d_shmat.U):
1333 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1334 symbol, which indicates that sys/shm.h has a prototype for
1335 shmat.
1336
1337d_shmctl (d_shmctl.U):
1338 This variable conditionally defines the HAS_SHMCTL symbol, which
1339 indicates to the C program that the shmctl() routine is available.
1340
1341d_shmdt (d_shmdt.U):
1342 This variable conditionally defines the HAS_SHMDT symbol, which
1343 indicates to the C program that the shmdt() routine is available.
1344
1345d_shmget (d_shmget.U):
1346 This variable conditionally defines the HAS_SHMGET symbol, which
1347 indicates to the C program that the shmget() routine is available.
1348
1349d_sigaction (d_sigaction.U):
1350 This variable conditionally defines the HAS_SIGACTION symbol, which
1351 indicates that the Vr4 sigaction() routine is available.
1352
1353d_sigsetjmp (d_sigsetjmp.U):
1354 This variable conditionally defines the HAS_SIGSETJMP symbol,
1355 which indicates that the sigsetjmp() routine is available to
1356 call setjmp() and optionally save the process's signal mask.
1357
1358d_socket (d_socket.U):
1359 This variable conditionally defines HAS_SOCKET, which indicates
1360 that the BSD socket interface is supported.
1361
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1362d_socklen_t (d_socklen_t.U):
1363 This symbol will be defined if the C compiler supports socklen_t.
1364
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1365d_sockpair (d_socket.U):
1366 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1367 indicates that the BSD socketpair() is supported.
1368
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1369d_sqrtl (d_sqrtl.U):
1370 This variable conditionally defines the HAS_SQRTL symbol, which
1371 indicates to the C program that the sqrtl() routine is available.
1372
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1373d_statblks (d_statblks.U):
1374 This variable conditionally defines USE_STAT_BLOCKS
1375 if this system has a stat structure declaring
1376 st_blksize and st_blocks.
1377
ad27e871 1378d_statfs_f_flags (d_statfs_f_flags.U):
0545a864 1379 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
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1380 symbol, which indicates to struct statfs from has f_flags member.
1381 This kind of struct statfs is coming from sys/mount.h (BSD),
1382 not from sys/statfs.h (SYSV).
1383
ad27e871 1384d_statfs_s (d_statfs_s.U):
0545a864
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1385 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1386 which indicates that the struct statfs is supported.
1387
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1388d_statvfs (d_statvfs.U):
1389 This variable conditionally defines the HAS_STATVFS symbol, which
1390 indicates to the C program that the statvfs() routine is available.
1391
1392d_stdio_cnt_lval (d_stdstdio.U):
1393 This variable conditionally defines STDIO_CNT_LVALUE if the
1394 FILE_cnt macro can be used as an lvalue.
1395
1396d_stdio_ptr_lval (d_stdstdio.U):
1397 This variable conditionally defines STDIO_PTR_LVALUE if the
1398 FILE_ptr macro can be used as an lvalue.
1399
1400d_stdio_stream_array (stdio_streams.U):
1401 This variable tells whether there is an array holding
1402 the stdio streams.
1403
1404d_stdiobase (d_stdstdio.U):
1405 This variable conditionally defines USE_STDIO_BASE if this system
1406 has a FILE structure declaring a usable _base field (or equivalent)
1407 in stdio.h.
1408
1409d_stdstdio (d_stdstdio.U):
1410 This variable conditionally defines USE_STDIO_PTR if this system
1411 has a FILE structure declaring usable _ptr and _cnt fields (or
1412 equivalent) in stdio.h.
1413
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1414d_strchr (d_strchr.U):
1415 This variable conditionally defines HAS_STRCHR if strchr() and
1416 strrchr() are available for string searching.
1417
1418d_strcoll (d_strcoll.U):
1419 This variable conditionally defines HAS_STRCOLL if strcoll() is
1420 available to compare strings using collating information.
1421
1422d_strctcpy (d_strctcpy.U):
1423 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1424 indicates to the C program that this C compiler knows how to copy
1425 structures.
1426
1427d_strerrm (d_strerror.U):
1428 This variable holds what Strerrr is defined as to translate an error
1429 code condition into an error message string. It could be 'strerror'
1430 or a more complex macro emulating strrror with sys_errlist[], or the
1431 "unknown" string when both strerror and sys_errlist are missing.
1432
1433d_strerror (d_strerror.U):
1434 This variable conditionally defines HAS_STRERROR if strerror() is
1435 available to translate error numbers to strings.
1436
1437d_strtod (d_strtod.U):
1438 This variable conditionally defines the HAS_STRTOD symbol, which
1439 indicates to the C program that the strtod() routine is available
1440 to provide better numeric string conversion than atof().
1441
1442d_strtol (d_strtol.U):
1443 This variable conditionally defines the HAS_STRTOL symbol, which
1444 indicates to the C program that the strtol() routine is available
1445 to provide better numeric string conversion than atoi() and friends.
1446
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1447d_strtold (d_strtold.U):
1448 This variable conditionally defines the HAS_STRTOLD symbol, which
1449 indicates to the C program that the strtold() routine is available.
1450
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1451d_strtoll (d_strtoll.U):
1452 This variable conditionally defines the HAS_STRTOLL symbol, which
1453 indicates to the C program that the strtoll() routine is available.
1454
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1455d_strtoul (d_strtoul.U):
1456 This variable conditionally defines the HAS_STRTOUL symbol, which
1457 indicates to the C program that the strtoul() routine is available
1458 to provide conversion of strings to unsigned long.
1459
ff935051 1460d_strtoull (d_strtoull.U):
11dc3f68
JH
1461 This variable conditionally defines the HAS_STRTOULL symbol, which
1462 indicates to the C program that the strtoull() routine is available.
1463
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1464d_strtouq (d_strtouq.U):
1465 This variable conditionally defines the HAS_STRTOUQ symbol, which
1466 indicates to the C program that the strtouq() routine is available.
1467
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1468d_strxfrm (d_strxfrm.U):
1469 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1470 available to transform strings.
1471
1472d_suidsafe (d_dosuid.U):
1473 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1474 if setuid scripts can be secure. This test looks in /dev/fd/.
1475
1476d_symlink (d_symlink.U):
1477 This variable conditionally defines the HAS_SYMLINK symbol, which
1478 indicates to the C program that the symlink() routine is available
1479 to create symbolic links.
1480
1481d_syscall (d_syscall.U):
1482 This variable conditionally defines HAS_SYSCALL if syscall() is
1483 available call arbitrary system calls.
1484
1485d_sysconf (d_sysconf.U):
1486 This variable conditionally defines the HAS_SYSCONF symbol, which
1487 indicates to the C program that the sysconf() routine is available
1488 to determine system related limits and options.
1489
1490d_sysernlst (d_strerror.U):
1491 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1492 is available to translate error numbers to the symbolic name.
1493
1494d_syserrlst (d_strerror.U):
1495 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1496 available to translate error numbers to strings.
1497
1498d_system (d_system.U):
1499 This variable conditionally defines HAS_SYSTEM if system() is
1500 available to issue a shell command.
1501
1502d_tcgetpgrp (d_tcgtpgrp.U):
1503 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1504 indicates to the C program that the tcgetpgrp() routine is available.
1505 to get foreground process group ID.
1506
1507d_tcsetpgrp (d_tcstpgrp.U):
1508 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1509 indicates to the C program that the tcsetpgrp() routine is available
1510 to set foreground process group ID.
1511
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1512d_telldir (d_readdir.U):
1513 This variable conditionally defines HAS_TELLDIR if telldir() is
1514 available.
1515
1516d_telldirproto (d_telldirproto.U):
1517 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1518 which indicates to the C program that the system provides
1519 a prototype for the telldir() function. Otherwise, it is
1520 up to the program to supply one.
1521
1522d_time (d_time.U):
1523 This variable conditionally defines the HAS_TIME symbol, which indicates
1524 that the time() routine exists. The time() routine is normaly
1525 provided on UNIX systems.
1526
1527d_times (d_times.U):
1528 This variable conditionally defines the HAS_TIMES symbol, which indicates
1529 that the times() routine exists. The times() routine is normaly
1530 provided on UNIX systems. You may have to include <sys/times.h>.
1531
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1532d_truncate (d_truncate.U):
1533 This variable conditionally defines HAS_TRUNCATE if truncate() is
1534 available to truncate files.
1535
1536d_tzname (d_tzname.U):
1537 This variable conditionally defines HAS_TZNAME if tzname[] is
1538 available to access timezone names.
1539
1540d_umask (d_umask.U):
1541 This variable conditionally defines the HAS_UMASK symbol, which
1542 indicates to the C program that the umask() routine is available.
1543 to set and get the value of the file creation mask.
1544
1545d_uname (d_gethname.U):
1546 This variable conditionally defines the HAS_UNAME symbol, which
1547 indicates to the C program that the uname() routine may be
1548 used to derive the host name.
1549
1550d_union_semun (d_union_semun.U):
1551 This variable conditionally defines HAS_UNION_SEMUN if the
1552 union semun is defined by including <sys/sem.h>.
1553
0545a864
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1554d_ustat (d_ustat.U):
1555 This variable conditionally defines HAS_USTAT if ustat() is
1556 available to query file system statistics by dev_t.
1557
0617aed7
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1558d_vendorbin (vendorbin.U):
1559 This variable conditionally defines PERL_VENDORBIN.
1560
a3635516
JH
1561d_vendorlib (vendorlib.U):
1562 This variable conditionally defines PERL_VENDORLIB.
1563
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1564d_vfork (d_vfork.U):
1565 This variable conditionally defines the HAS_VFORK symbol, which
1566 indicates the vfork() routine is available.
1567
1568d_void_closedir (d_closedir.U):
1569 This variable conditionally defines VOID_CLOSEDIR if closedir()
1570 does not return a value.
1571
1572d_voidsig (d_voidsig.U):
1573 This variable conditionally defines VOIDSIG if this system
1574 declares "void (*signal(...))()" in signal.h. The old way was to
1575 declare it as "int (*signal(...))()".
1576
1577d_voidtty (i_sysioctl.U):
1578 This variable conditionally defines USE_IOCNOTTY to indicate that the
1579 ioctl() call with TIOCNOTTY should be used to void tty association.
1580 Otherwise (on USG probably), it is enough to close the standard file
1581 decriptors and do a setpgrp().
1582
1583d_volatile (d_volatile.U):
1584 This variable conditionally defines the HASVOLATILE symbol, which
1585 indicates to the C program that this C compiler knows about the
1586 volatile declaration.
1587
1588d_vprintf (d_vprintf.U):
1589 This variable conditionally defines the HAS_VPRINTF symbol, which
1590 indicates to the C program that the vprintf() routine is available
1591 to printf with a pointer to an argument list.
1592
1593d_wait4 (d_wait4.U):
1594 This variable conditionally defines the HAS_WAIT4 symbol, which
1595 indicates the wait4() routine is available.
1596
1597d_waitpid (d_waitpid.U):
1598 This variable conditionally defines HAS_WAITPID if waitpid() is
1599 available to wait for child process.
1600
1601d_wcstombs (d_wcstombs.U):
1602 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1603 indicates to the C program that the wcstombs() routine is available
1604 to convert wide character strings to multibyte strings.
1605
1606d_wctomb (d_wctomb.U):
1607 This variable conditionally defines the HAS_WCTOMB symbol, which
1608 indicates to the C program that the wctomb() routine is available
1609 to convert a wide character to a multibyte.
1610
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1611d_xenix (Guess.U):
1612 This variable conditionally defines the symbol XENIX, which alerts
1613 the C program that it runs under Xenix.
1614
1615date (Loc.U):
5bf26616 1616 This variable is used internally by Configure to determine the
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1617 full pathname (if any) of the date program. After Configure runs,
1618 the value is reset to a plain "date" and is not useful.
1619
1620db_hashtype (i_db.U):
1621 This variable contains the type of the hash structure element
1622 in the <db.h> header file. In older versions of DB, it was
1623 int, while in newer ones it is u_int32_t.
1624
1625db_prefixtype (i_db.U):
1626 This variable contains the type of the prefix structure element
1627 in the <db.h> header file. In older versions of DB, it was
1628 int, while in newer ones it is size_t.
1629
1630defvoidused (voidflags.U):
1631 This variable contains the default value of the VOIDUSED symbol (15).
1632
1633direntrytype (i_dirent.U):
1634 This symbol is set to 'struct direct' or 'struct dirent' depending on
1635 whether dirent is available or not. You should use this pseudo type to
1636 portably declare your directory entries.
1637
1638dlext (dlext.U):
1639 This variable contains the extension that is to be used for the
1640 dynamically loaded modules that perl generaties.
1641
1642dlsrc (dlsrc.U):
1643 This variable contains the name of the dynamic loading file that
1644 will be used with the package.
1645
1646doublesize (doublesize.U):
1647 This variable contains the value of the DOUBLESIZE symbol, which
1648 indicates to the C program how many bytes there are in a double.
1649
1650drand01 (randfunc.U):
1651 Indicates the macro to be used to generate normalized
1652 random numbers. Uses randfunc, often divided by
1653 (double) (((unsigned long) 1 << randbits)) in order to
1654 normalize the result.
1655 In C programs, the macro 'Drand01' is mapped to drand01.
1656
1657dynamic_ext (Extensions.U):
1658 This variable holds a list of XS extension files we want to
1659 link dynamically into the package. It is used by Makefile.
1660
1661eagain (nblock_io.U):
1662 This variable bears the symbolic errno code set by read() when no
1663 data is present on the file and non-blocking I/O was enabled (otherwise,
1664 read() blocks naturally).
1665
1666ebcdic (ebcdic.U):
1667 This variable conditionally defines EBCDIC if this
1668 system uses EBCDIC encoding. Among other things, this
1669 means that the character ranges are not contiguous.
1670 See trnl.U
1671
1672echo (Loc.U):
5bf26616 1673 This variable is used internally by Configure to determine the
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1674 full pathname (if any) of the echo program. After Configure runs,
1675 the value is reset to a plain "echo" and is not useful.
1676
1677egrep (Loc.U):
5bf26616 1678 This variable is used internally by Configure to determine the
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1679 full pathname (if any) of the egrep program. After Configure runs,
1680 the value is reset to a plain "egrep" and is not useful.
1681
1682emacs (Loc.U):
1683 This variable is defined but not used by Configure.
1684 The value is a plain '' and is not useful.
1685
1686eunicefix (Init.U):
1687 When running under Eunice this variable contains a command which will
1688 convert a shell script to the proper form of text file for it to be
1689 executable by the shell. On other systems it is a no-op.
1690
1691exe_ext (Unix.U):
1692 This is an old synonym for _exe.
1693
1694expr (Loc.U):
5bf26616 1695 This variable is used internally by Configure to determine the
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1696 full pathname (if any) of the expr program. After Configure runs,
1697 the value is reset to a plain "expr" and is not useful.
1698
1699extensions (Extensions.U):
1700 This variable holds a list of all extension files (both XS and
1701 non-xs linked into the package. It is propagated to Config.pm
1702 and is typically used to test whether a particular extesion
1703 is available.
1704
1705fflushall (fflushall.U):
1706 This symbol, if defined, tells that to flush
1707 all pending stdio output one must loop through all
1708 the stdio file handles stored in an array and fflush them.
1709 Note that if fflushNULL is defined, fflushall will not
1710 even be probed for and will be left undefined.
1711
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1712fflushNULL (fflushall.U):
1713 This symbol, if defined, tells that fflush(NULL) does flush
1714 all pending stdio output.
1715
781b178c 1716find (Loc.U):
ff935051
JH
1717 This variable is defined but not used by Configure.
1718 The value is a plain '' and is not useful.
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1719
1720firstmakefile (Unix.U):
1721 This variable defines the first file searched by make. On unix,
1722 it is makefile (then Makefile). On case-insensitive systems,
1723 it might be something else. This is only used to deal with
1724 convoluted make depend tricks.
1725
1726flex (Loc.U):
1727 This variable is defined but not used by Configure.
1728 The value is a plain '' and is not useful.
1729
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JH
1730fpossize (fpossize.U):
1731 This variable contains the size of a fpostype in bytes.
1732
781b178c 1733fpostype (fpostype.U):
a22e52b9 1734 This variable defines Fpos_t to be something like fpos_t, long,
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1735 uint, or whatever type is used to declare file positions in libc.
1736
1737freetype (mallocsrc.U):
1738 This variable contains the return type of free(). It is usually
1739 void, but occasionally int.
1740
1741full_ar (Loc_ar.U):
1742 This variable contains the full pathname to 'ar', whether or
1743 not the user has specified 'portability'. This is only used
1744 in the Makefile.SH.
1745
1746full_csh (d_csh.U):
1747 This variable contains the full pathname to 'csh', whether or
1748 not the user has specified 'portability'. This is only used
1749 in the compiled C program, and we assume that all systems which
1750 can share this executable will have the same full pathname to
1751 'csh.'
1752
1753full_sed (Loc_sed.U):
1754 This variable contains the full pathname to 'sed', whether or
1755 not the user has specified 'portability'. This is only used
1756 in the compiled C program, and we assume that all systems which
1757 can share this executable will have the same full pathname to
1758 'sed.'
1759
1760gccversion (cc.U):
1761 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1762 indicate whether the compiler is version 1 or 2. This is used in
1763 setting some of the default cflags. It is set to '' if not gcc.
1764
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1765gidformat (gidf.U):
1766 This variable contains the format string used for printing a Gid_t.
1767
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1768gidsign (gidsign.U):
1769 This variable contains the signedness of a gidtype.
1770 1 for unsigned, -1 for signed.
1771
1772gidsize (gidsize.U):
1773 This variable contains the size of a gidtype in bytes.
1774
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1775gidtype (gidtype.U):
1776 This variable defines Gid_t to be something like gid_t, int,
1777 ushort, or whatever type is used to declare the return type
1778 of getgid(). Typically, it is the type of group ids in the kernel.
1779
1780glibpth (libpth.U):
1781 This variable holds the general path (space-separated) used to
1782 find libraries. It may contain directories that do not exist on
1783 this platform, libpth is the cleaned-up version.
1784
1785grep (Loc.U):
5bf26616 1786 This variable is used internally by Configure to determine the
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1787 full pathname (if any) of the grep program. After Configure runs,
1788 the value is reset to a plain "grep" and is not useful.
1789
1790groupcat (nis.U):
1791 This variable contains a command that produces the text of the
1792 /etc/group file. This is normally "cat /etc/group", but can be
1793 "ypcat group" when NIS is used.
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1794 On some systems, such as os390, there may be no equivalent
1795 command, in which case this variable is unset.
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1796
1797groupstype (groupstype.U):
1798 This variable defines Groups_t to be something like gid_t, int,
1799 ushort, or whatever type is used for the second argument to
1800 getgroups() and setgroups(). Usually, this is the same as
1801 gidtype (gid_t), but sometimes it isn't.
1802
1803gzip (Loc.U):
5bf26616 1804 This variable is used internally by Configure to determine the
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1805 full pathname (if any) of the gzip program. After Configure runs,
1806 the value is reset to a plain "gzip" and is not useful.
1807
1808h_fcntl (h_fcntl.U):
1809 This is variable gets set in various places to tell i_fcntl that
1810 <fcntl.h> should be included.
1811
1812h_sysfile (h_sysfile.U):
1813 This is variable gets set in various places to tell i_sys_file that
1814 <sys/file.h> should be included.
1815
1816hint (Oldconfig.U):
1817 Gives the type of hints used for previous answers. May be one of
1818 "default", "recommended" or "previous".
1819
1820hostcat (nis.U):
1821 This variable contains a command that produces the text of the
1822 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1823 "ypcat hosts" when NIS is used.
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1824 On some systems, such as os390, there may be no equivalent
1825 command, in which case this variable is unset.
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1826
1827huge (models.U):
1828 This variable contains a flag which will tell the C compiler and loader
1829 to produce a program running with a huge memory model. If the
1830 huge model is not supported, contains the flag to produce large
1831 model programs. It is up to the Makefile to use this.
1832
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1833i16size (perlxv.U):
1834 This variable is the size of an I16 in bytes.
1835
1836i16type (perlxv.U):
1837 This variable contains the C type used for Perl's I16.
1838
1839i32size (perlxv.U):
1840 This variable is the size of an I32 in bytes.
1841
1842i32type (perlxv.U):
1843 This variable contains the C type used for Perl's I32.
1844
1845i64size (perlxv.U):
1846 This variable is the size of an I64 in bytes.
1847
1848i64type (perlxv.U):
1849 This variable contains the C type used for Perl's I64.
1850
1851i8size (perlxv.U):
1852 This variable is the size of an I8 in bytes.
1853
1854i8type (perlxv.U):
1855 This variable contains the C type used for Perl's I8.
1856
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1857i_arpainet (i_arpainet.U):
1858 This variable conditionally defines the I_ARPA_INET symbol,
1859 and indicates whether a C program should include <arpa/inet.h>.
1860
1861i_bsdioctl (i_sysioctl.U):
1862 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1863 indicates to the C program that <sys/bsdioctl.h> exists and should
1864 be included.
1865
1866i_db (i_db.U):
1867 This variable conditionally defines the I_DB symbol, and indicates
1868 whether a C program may include Berkeley's DB include file <db.h>.
1869
1870i_dbm (i_dbm.U):
1871 This variable conditionally defines the I_DBM symbol, which
1872 indicates to the C program that <dbm.h> exists and should
1873 be included.
1874
1875i_dirent (i_dirent.U):
1876 This variable conditionally defines I_DIRENT, which indicates
1877 to the C program that it should include <dirent.h>.
1878
1879i_dld (i_dld.U):
1880 This variable conditionally defines the I_DLD symbol, which
1881 indicates to the C program that <dld.h> (GNU dynamic loading)
1882 exists and should be included.
1883
1884i_dlfcn (i_dlfcn.U):
1885 This variable conditionally defines the I_DLFCN symbol, which
1886 indicates to the C program that <dlfcn.h> exists and should
1887 be included.
1888
1889i_fcntl (i_fcntl.U):
1890 This variable controls the value of I_FCNTL (which tells
1891 the C program to include <fcntl.h>).
1892
1893i_float (i_float.U):
1894 This variable conditionally defines the I_FLOAT symbol, and indicates
1895 whether a C program may include <float.h> to get symbols like DBL_MAX
1896 or DBL_MIN, i.e. machine dependent floating point values.
1897
1898i_gdbm (i_gdbm.U):
1899 This variable conditionally defines the I_GDBM symbol, which
1900 indicates to the C program that <gdbm.h> exists and should
1901 be included.
1902
1903i_grp (i_grp.U):
1904 This variable conditionally defines the I_GRP symbol, and indicates
1905 whether a C program should include <grp.h>.
1906
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1907i_iconv (i_iconv.U):
1908 This variable conditionally defines the I_ICONV symbol, and indicates
1909 whether a C program should include <iconv.h>.
1910
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1911i_inttypes (i_inttypes.U):
1912 This variable conditionally defines the I_INTTYPES symbol,
1913 and indicates whether a C program should include <inttypes.h>.
1914
1915i_limits (i_limits.U):
1916 This variable conditionally defines the I_LIMITS symbol, and indicates
1917 whether a C program may include <limits.h> to get symbols like WORD_BIT
1918 and friends.
1919
1920i_locale (i_locale.U):
1921 This variable conditionally defines the I_LOCALE symbol,
1922 and indicates whether a C program should include <locale.h>.
1923
1924i_machcthr (i_machcthr.U):
1925 This variable conditionally defines the I_MACH_CTHREADS symbol,
1926 and indicates whether a C program should include <mach/cthreads.h>.
1927
1928i_malloc (i_malloc.U):
1929 This variable conditionally defines the I_MALLOC symbol, and indicates
1930 whether a C program should include <malloc.h>.
1931
1932i_math (i_math.U):
1933 This variable conditionally defines the I_MATH symbol, and indicates
1934 whether a C program may include <math.h>.
1935
1936i_memory (i_memory.U):
1937 This variable conditionally defines the I_MEMORY symbol, and indicates
1938 whether a C program should include <memory.h>.
1939
1940i_mntent (i_mntent.U):
1941 This variable conditionally defines the I_MNTENT symbol, and indicates
1942 whether a C program should include <mntent.h>.
1943
1944i_ndbm (i_ndbm.U):
1945 This variable conditionally defines the I_NDBM symbol, which
1946 indicates to the C program that <ndbm.h> exists and should
1947 be included.
1948
1949i_netdb (i_netdb.U):
1950 This variable conditionally defines the I_NETDB symbol, and indicates
1951 whether a C program should include <netdb.h>.
1952
1953i_neterrno (i_neterrno.U):
1954 This variable conditionally defines the I_NET_ERRNO symbol, which
1955 indicates to the C program that <net/errno.h> exists and should
1956 be included.
1957
1958i_netinettcp (i_netinettcp.U):
1959 This variable conditionally defines the I_NETINET_TCP symbol,
1960 and indicates whether a C program should include <netinet/tcp.h>.
1961
1962i_niin (i_niin.U):
1963 This variable conditionally defines I_NETINET_IN, which indicates
1964 to the C program that it should include <netinet/in.h>. Otherwise,
1965 you may try <sys/in.h>.
1966
1967i_poll (i_poll.U):
1968 This variable conditionally defines the I_POLL symbol, and indicates
1969 whether a C program should include <poll.h>.
1970
1971i_pthread (i_pthread.U):
190b66db 1972 This variable conditionally defines the I_PTHREAD symbol,
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1973 and indicates whether a C program should include <pthread.h>.
1974
1975i_pwd (i_pwd.U):
1976 This variable conditionally defines I_PWD, which indicates
1977 to the C program that it should include <pwd.h>.
1978
1979i_rpcsvcdbm (i_dbm.U):
1980 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1981 indicates to the C program that <rpcsvc/dbm.h> exists and should
1982 be included. Some System V systems might need this instead of <dbm.h>.
1983
1984i_sfio (i_sfio.U):
1985 This variable conditionally defines the I_SFIO symbol,
1986 and indicates whether a C program should include <sfio.h>.
1987
1988i_sgtty (i_termio.U):
1989 This variable conditionally defines the I_SGTTY symbol, which
1990 indicates to the C program that it should include <sgtty.h> rather
1991 than <termio.h>.
1992
1993i_shadow (i_shadow.U):
1994 This variable conditionally defines the I_SHADOW symbol, and indicates
1995 whether a C program should include <shadow.h>.
1996
1997i_socks (i_socks.U):
1998 This variable conditionally defines the I_SOCKS symbol, and indicates
1999 whether a C program should include <socks.h>.
2000
2001i_stdarg (i_varhdr.U):
2002 This variable conditionally defines the I_STDARG symbol, which
2003 indicates to the C program that <stdarg.h> exists and should
2004 be included.
2005
2006i_stddef (i_stddef.U):
2007 This variable conditionally defines the I_STDDEF symbol, which
2008 indicates to the C program that <stddef.h> exists and should
2009 be included.
2010
2011i_stdlib (i_stdlib.U):
2012 This variable conditionally defines the I_STDLIB symbol, which
2013 indicates to the C program that <stdlib.h> exists and should
2014 be included.
2015
2016i_string (i_string.U):
2017 This variable conditionally defines the I_STRING symbol, which
2018 indicates that <string.h> should be included rather than <strings.h>.
2019
2020i_sysaccess (i_sysaccess.U):
2021 This variable conditionally defines the I_SYS_ACCESS symbol,
2022 and indicates whether a C program should include <sys/access.h>.
2023
2024i_sysdir (i_sysdir.U):
2025 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2026 whether a C program should include <sys/dir.h>.
2027
2028i_sysfile (i_sysfile.U):
2029 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2030 whether a C program should include <sys/file.h> to get R_OK and friends.
2031
2032i_sysfilio (i_sysioctl.U):
2033 This variable conditionally defines the I_SYS_FILIO symbol, which
2034 indicates to the C program that <sys/filio.h> exists and should
2035 be included in preference to <sys/ioctl.h>.
2036
2037i_sysin (i_niin.U):
2038 This variable conditionally defines I_SYS_IN, which indicates
2039 to the C program that it should include <sys/in.h> instead of
2040 <netinet/in.h>.
2041
2042i_sysioctl (i_sysioctl.U):
2043 This variable conditionally defines the I_SYS_IOCTL symbol, which
2044 indicates to the C program that <sys/ioctl.h> exists and should
2045 be included.
2046
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2047i_syslog (i_syslog.U):
2048 This variable conditionally defines the I_SYSLOG symbol,
2049 and indicates whether a C program should include <syslog.h>.
2050
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2051i_sysmman (i_sysmman.U):
2052 This variable conditionally defines the I_SYS_MMAN symbol, and
2053 indicates whether a C program should include <sys/mman.h>.
2054
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2055i_sysmode (i_sysmode.U):
2056 This variable conditionally defines the I_SYSMODE symbol,
2057 and indicates whether a C program should include <sys/mode.h>.
2058
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2059i_sysmount (i_sysmount.U):
2060 This variable conditionally defines the I_SYSMOUNT symbol,
2061 and indicates whether a C program should include <sys/mount.h>.
2062
2063i_sysndir (i_sysndir.U):
2064 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2065 whether a C program should include <sys/ndir.h>.
2066
2067i_sysparam (i_sysparam.U):
2068 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2069 whether a C program should include <sys/param.h>.
2070
2071i_sysresrc (i_sysresrc.U):
2072 This variable conditionally defines the I_SYS_RESOURCE symbol,
2073 and indicates whether a C program should include <sys/resource.h>.
2074
2075i_syssecrt (i_syssecrt.U):
2076 This variable conditionally defines the I_SYS_SECURITY symbol,
2077 and indicates whether a C program should include <sys/security.h>.
2078
2079i_sysselct (i_sysselct.U):
2080 This variable conditionally defines I_SYS_SELECT, which indicates
2081 to the C program that it should include <sys/select.h> in order to
2082 get the definition of struct timeval.
2083
2084i_syssockio (i_sysioctl.U):
2085 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2086 C program that socket ioctl codes may be found in <sys/sockio.h>
2087 instead of <sys/ioctl.h>.
2088
2089i_sysstat (i_sysstat.U):
2090 This variable conditionally defines the I_SYS_STAT symbol,
2091 and indicates whether a C program should include <sys/stat.h>.
2092
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2093i_sysstatfs (i_sysstatfs.U):
2094 This variable conditionally defines the I_SYSSTATFS symbol,
2095 and indicates whether a C program should include <sys/statfs.h>.
2096
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2097i_sysstatvfs (i_sysstatvfs.U):
2098 This variable conditionally defines the I_SYSSTATVFS symbol,
2099 and indicates whether a C program should include <sys/statvfs.h>.
2100
2101i_systime (i_time.U):
2102 This variable conditionally defines I_SYS_TIME, which indicates
2103 to the C program that it should include <sys/time.h>.
2104
2105i_systimek (i_time.U):
2106 This variable conditionally defines I_SYS_TIME_KERNEL, which
2107 indicates to the C program that it should include <sys/time.h>
2108 with KERNEL defined.
2109
2110i_systimes (i_systimes.U):
2111 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2112 whether a C program should include <sys/times.h>.
2113
2114i_systypes (i_systypes.U):
2115 This variable conditionally defines the I_SYS_TYPES symbol,
2116 and indicates whether a C program should include <sys/types.h>.
2117
2118i_sysuio (i_sysuio.U):
2119 This variable conditionally defines the I_SYSUIO symbol, and indicates
2120 whether a C program should include <sys/uio.h>.
2121
2122i_sysun (i_sysun.U):
2123 This variable conditionally defines I_SYS_UN, which indicates
2124 to the C program that it should include <sys/un.h> to get UNIX
2125 domain socket definitions.
2126
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2127i_sysutsname (i_sysutsname.U):
2128 This variable conditionally defines the I_SYSUTSNAME symbol,
2129 and indicates whether a C program should include <sys/utsname.h>.
2130
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2131i_sysvfs (i_sysvfs.U):
2132 This variable conditionally defines the I_SYSVFS symbol,
2133 and indicates whether a C program should include <sys/vfs.h>.
2134
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2135i_syswait (i_syswait.U):
2136 This variable conditionally defines I_SYS_WAIT, which indicates
2137 to the C program that it should include <sys/wait.h>.
2138
2139i_termio (i_termio.U):
2140 This variable conditionally defines the I_TERMIO symbol, which
2141 indicates to the C program that it should include <termio.h> rather
2142 than <sgtty.h>.
2143
2144i_termios (i_termio.U):
2145 This variable conditionally defines the I_TERMIOS symbol, which
2146 indicates to the C program that the POSIX <termios.h> file is
2147 to be included.
2148
2149i_time (i_time.U):
2150 This variable conditionally defines I_TIME, which indicates
2151 to the C program that it should include <time.h>.
2152
2153i_unistd (i_unistd.U):
2154 This variable conditionally defines the I_UNISTD symbol, and indicates
2155 whether a C program should include <unistd.h>.
2156
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2157i_ustat (i_ustat.U):
2158 This variable conditionally defines the I_USTAT symbol, and indicates
2159 whether a C program should include <ustat.h>.
2160
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2161i_utime (i_utime.U):
2162 This variable conditionally defines the I_UTIME symbol, and indicates
2163 whether a C program should include <utime.h>.
2164
2165i_values (i_values.U):
2166 This variable conditionally defines the I_VALUES symbol, and indicates
2167 whether a C program may include <values.h> to get symbols like MAXLONG
2168 and friends.
2169
2170i_varargs (i_varhdr.U):
2171 This variable conditionally defines I_VARARGS, which indicates
2172 to the C program that it should include <varargs.h>.
2173
2174i_varhdr (i_varhdr.U):
2175 Contains the name of the header to be included to get va_dcl definition.
2176 Typically one of varargs.h or stdarg.h.
2177
2178i_vfork (i_vfork.U):
2179 This variable conditionally defines the I_VFORK symbol, and indicates
2180 whether a C program should include vfork.h.
2181
2182ignore_versioned_solibs (libs.U):
2183 This variable should be non-empty if non-versioned shared
2184 libraries (libfoo.so.x.y) are to be ignored (because they
2185 cannot be linked against).
2186
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2187inc_version_list (inc_version_list.U):
2188 This variable specifies the list of subdirectories in over
2189 which perl.c:incpush() and lib/lib.pm will automatically
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2190 search when adding directories to @INC. The elements in
2191 the list are separated by spaces. This is only useful
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2192 if you have a perl library directory tree structured like the
2193 default one. See INSTALL for how this works. The versioned
2194 site_perl directory was introduced in 5.005, so that is the
2195 lowest possible value.
2196
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2197inc_version_list_init (inc_version_list.U):
2198 This variable holds the same list as inc_version_list, but
2199 each item is enclosed in double quotes and separated by commas,
2200 suitable for use in the PERL_INC_VERSION_LIST initialization.
2201
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2202incpath (usrinc.U):
2203 This variable must preceed the normal include path to get hte
2204 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2205 Value can be "" or "/bsd43" on mips.
2206
2207inews (Loc.U):
2208 This variable is defined but not used by Configure.
2209 The value is a plain '' and is not useful.
2210
2211installarchlib (archlib.U):
2212 This variable is really the same as archlibexp but may differ on
2213 those systems using AFS. For extra portability, only this variable
2214 should be used in makefiles.
2215
2216installbin (bin.U):
2217 This variable is the same as binexp unless AFS is running in which case
2218 the user is explicitely prompted for it. This variable should always
2219 be used in your makefiles for maximum portability.
2220
2221installman1dir (man1dir.U):
2222 This variable is really the same as man1direxp, unless you are using
2223 AFS in which case it points to the read/write location whereas
2224 man1direxp only points to the read-only access location. For extra
2225 portability, you should only use this variable within your makefiles.
2226
2227installman3dir (man3dir.U):
2228 This variable is really the same as man3direxp, unless you are using
2229 AFS in which case it points to the read/write location whereas
2230 man3direxp only points to the read-only access location. For extra
2231 portability, you should only use this variable within your makefiles.
2232
2233installprefix (installprefix.U):
2234 This variable holds the name of the directory below which
2235 "make install" will install the package. For most users, this
2236 is the same as prefix. However, it is useful for
2237 installing the software into a different (usually temporary)
2238 location after which it can be bundled up and moved somehow
2239 to the final location specified by prefix.
2240
2241installprefixexp (installprefix.U):
2242 This variable holds the full absolute path of installprefix
2243 with all ~-expansion done.
2244
2245installprivlib (privlib.U):
2246 This variable is really the same as privlibexp but may differ on
2247 those systems using AFS. For extra portability, only this variable
2248 should be used in makefiles.
2249
2250installscript (scriptdir.U):
2251 This variable is usually the same as scriptdirexp, unless you are on
2252 a system running AFS, in which case they may differ slightly. You
2253 should always use this variable within your makefiles for portability.
2254
2255installsitearch (sitearch.U):
2256 This variable is really the same as sitearchexp but may differ on
2257 those systems using AFS. For extra portability, only this variable
2258 should be used in makefiles.
2259
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2260installsitebin (sitebin.U):
2261 This variable is usually the same as sitebinexp, unless you are on
2262 a system running AFS, in which case they may differ slightly. You
2263 should always use this variable within your makefiles for portability.
2264
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2265installsitelib (sitelib.U):
2266 This variable is really the same as sitelibexp but may differ on
2267 those systems using AFS. For extra portability, only this variable
2268 should be used in makefiles.
2269
2270installstyle (installstyle.U):
2271 This variable describes the "style" of the perl installation.
2272 This is intended to be useful for tools that need to
2273 manipulate entire perl distributions. Perl itself doesn't use
2274 this to find its libraries -- the library directories are
2275 stored directly in Config.pm. Currently, there are only two
2276 styles: "lib" and "lib/perl5". The default library locations
2277 (e.g. privlib, sitelib) are either $prefix/lib or
2278 $prefix/lib/perl5. The former is useful if $prefix is a
2279 directory dedicated to perl (e.g. /opt/perl), while the latter
2280 is useful if $prefix is shared by many packages, e.g. if
2281 $prefix=/usr/local.
2282 This may later be extended to include other information, so
2283 be careful with pattern-matching on the results.
2284 For compatibility with perl5.005 and earlier, the default
2285 setting is based on whether or not $prefix contains the string
2286 "perl".
2287
2288installusrbinperl (instubperl.U):
2289 This variable tells whether Perl should be installed also as
2290 /usr/bin/perl in addition to
2291 $installbin/perl
2292
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2293installvendorbin (vendorbin.U):
2294 This variable is really the same as vendorbinexp but may differ on
2295 those systems using AFS. For extra portability, only this variable
2296 should be used in makefiles.
2297
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2298installvendorlib (vendorlib.U):
2299 This variable is really the same as vendorlibexp but may differ on
2300 those systems using AFS. For extra portability, only this variable
2301 should be used in makefiles.
2302
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2303intsize (intsize.U):
2304 This variable contains the value of the INTSIZE symbol, which
2305 indicates to the C program how many bytes there are in an int.
2306
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2307ivdformat (perlxvf.U):
2308 This variable contains the format string used for printing
2309 a Perl IV as a signed decimal integer.
2310
2311ivsize (perlxv.U):
2312 This variable is the size of an IV in bytes.
2313
2314ivtype (perlxv.U):
2315 This variable contains the C type used for Perl's IV.
2316
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2317known_extensions (Extensions.U):
2318 This variable holds a list of all XS extensions included in
2319 the package.
2320
2321ksh (Loc.U):
2322 This variable is defined but not used by Configure.
2323 The value is a plain '' and is not useful.
2324
2325large (models.U):
2326 This variable contains a flag which will tell the C compiler and loader
2327 to produce a program running with a large memory model. It is up to
2328 the Makefile to use this.
2329
2330ld (dlsrc.U):
2331 This variable indicates the program to be used to link
2332 libraries for dynamic loading. On some systems, it is 'ld'.
2333 On ELF systems, it should be $cc. Mostly, we'll try to respect
2334 the hint file setting.
2335
2336lddlflags (dlsrc.U):
2337 This variable contains any special flags that might need to be
2338 passed to $ld to create a shared library suitable for dynamic
2339 loading. It is up to the makefile to use it. For hpux, it
2340 should be '-b'. For sunos 4.1, it is empty.
2341
2342ldflags (ccflags.U):
2343 This variable contains any additional C loader flags desired by
2344 the user. It is up to the Makefile to use this.
2345
2346ldlibpthname (libperl.U):
2347 This variable holds the name of the shared library
2348 search path, often LD_LIBRARY_PATH. To get an empty
2349 string, the hints file must set this to 'none'.
2350
2351less (Loc.U):
5bf26616 2352 This variable is used internally by Configure to determine the
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2353 full pathname (if any) of the less program. After Configure runs,
2354 the value is reset to a plain "less" and is not useful.
2355
2356lib_ext (Unix.U):
2357 This is an old synonym for _a.
2358
2359libc (libc.U):
2360 This variable contains the location of the C library.
2361
2362libperl (libperl.U):
2363 The perl executable is obtained by linking perlmain.c with
2364 libperl, any static extensions (usually just DynaLoader),
2365 and any other libraries needed on this system. libperl
2366 is usually libperl.a, but can also be libperl.so.xxx if
2367 the user wishes to build a perl executable with a shared
2368 library.
2369
2370libpth (libpth.U):
2371 This variable holds the general path (space-separated) used to find
2372 libraries. It is intended to be used by other units.
2373
2374libs (libs.U):
2375 This variable holds the additional libraries we want to use.
2376 It is up to the Makefile to deal with it.
2377
fe749a9f
JH
2378libsdirs (libs.U):
2379 This variable holds the directory names aka dirnames of the libraries
2380 we found and accepted, duplicates are removed.
2381
2382libsfiles (libs.U):
2383 This variable holds the filenames aka basenames of the libraries
2384 we found and accepted.
2385
2386libsfound (libs.U):
2387 This variable holds the full pathnames of the libraries
2388 we found and accepted.
2389
13b3f787
JH
2390libspath (libs.U):
2391 This variable holds the directory names probed for libraries.
2392
781b178c
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2393libswanted (Myinit.U):
2394 This variable holds a list of all the libraries we want to
2395 search. The order is chosen to pick up the c library
2396 ahead of ucb or bsd libraries for SVR4.
2397
2398line (Loc.U):
ff935051
JH
2399 This variable is defined but not used by Configure.
2400 The value is a plain '' and is not useful.
781b178c
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2401
2402lint (Loc.U):
2403 This variable is defined but not used by Configure.
2404 The value is a plain '' and is not useful.
2405
2406lkflags (ccflags.U):
2407 This variable contains any additional C partial linker flags desired by
2408 the user. It is up to the Makefile to use this.
2409
2410ln (Loc.U):
5bf26616 2411 This variable is used internally by Configure to determine the
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2412 full pathname (if any) of the ln program. After Configure runs,
2413 the value is reset to a plain "ln" and is not useful.
2414
2415lns (lns.U):
2416 This variable holds the name of the command to make
2417 symbolic links (if they are supported). It can be used
2418 in the Makefile. It is either 'ln -s' or 'ln'
2419
2420locincpth (ccflags.U):
2421 This variable contains a list of additional directories to be
2422 searched by the compiler. The appropriate '-I' directives will
2423 be added to ccflags. This is intended to simplify setting
2424 local directories from the Configure command line.
2425 It's not much, but it parallels the loclibpth stuff in libpth.U.
2426
2427loclibpth (libpth.U):
2428 This variable holds the paths (space-separated) used to find local
2429 libraries. It is prepended to libpth, and is intended to be easily
2430 set from the command line.
2431
2432longdblsize (d_longdbl.U):
2433 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2434 indicates to the C program how many bytes there are in a long double,
2435 if this system supports long doubles.
2436
2437longlongsize (d_longlong.U):
2438 This variable contains the value of the LONGLONGSIZE symbol, which
2439 indicates to the C program how many bytes there are in a long long,
2440 if this system supports long long.
2441
2442longsize (intsize.U):
2443 This variable contains the value of the LONGSIZE symbol, which
2444 indicates to the C program how many bytes there are in a long.
2445
2446lp (Loc.U):
2447 This variable is defined but not used by Configure.
2448 The value is a plain '' and is not useful.
2449
2450lpr (Loc.U):
2451 This variable is defined but not used by Configure.
2452 The value is a plain '' and is not useful.
2453
2454ls (Loc.U):
5bf26616 2455 This variable is used internally by Configure to determine the
781b178c
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2456 full pathname (if any) of the ls program. After Configure runs,
2457 the value is reset to a plain "ls" and is not useful.
2458
2459lseeksize (lseektype.U):
2460 This variable defines lseektype to be something like off_t, long,
2461 or whatever type is used to declare lseek offset's type in the
2462 kernel (which also appears to be lseek's return type).
2463
2464lseektype (lseektype.U):
2465 This variable defines lseektype to be something like off_t, long,
2466 or whatever type is used to declare lseek offset's type in the
2467 kernel (which also appears to be lseek's return type).
2468
2469mail (Loc.U):
2470 This variable is defined but not used by Configure.
2471 The value is a plain '' and is not useful.
2472
2473mailx (Loc.U):
2474 This variable is defined but not used by Configure.
2475 The value is a plain '' and is not useful.
2476
2477make (Loc.U):
5bf26616 2478 This variable is used internally by Configure to determine the
781b178c
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2479 full pathname (if any) of the make program. After Configure runs,
2480 the value is reset to a plain "make" and is not useful.
2481
2482make_set_make (make.U):
2483 Some versions of 'make' set the variable MAKE. Others do not.
2484 This variable contains the string to be included in Makefile.SH
2485 so that MAKE is set if needed, and not if not needed.
2486 Possible values are:
2487 make_set_make='#' # If your make program handles this for you,
2488 make_set_make="MAKE=$make" # if it doesn't.
2489 I used a comment character so that we can distinguish a
2490 'set' value (from a previous config.sh or Configure '-D' option)
2491 from an uncomputed value.
2492
2493mallocobj (mallocsrc.U):
2494 This variable contains the name of the malloc.o that this package
2495 generates, if that malloc.o is preferred over the system malloc.
2496 Otherwise the value is null. This variable is intended for generating
2497 Makefiles. See mallocsrc.
2498
2499mallocsrc (mallocsrc.U):
2500 This variable contains the name of the malloc.c that comes with
2501 the package, if that malloc.c is preferred over the system malloc.
2502 Otherwise the value is null. This variable is intended for generating
2503 Makefiles.
2504
2505malloctype (mallocsrc.U):
2506 This variable contains the kind of ptr returned by malloc and realloc.
2507
2508man1dir (man1dir.U):
2509 This variable contains the name of the directory in which manual
2510 source pages are to be put. It is the responsibility of the
2511 Makefile.SH to get the value of this into the proper command.
2512 You must be prepared to do the ~name expansion yourself.
2513
2514man1direxp (man1dir.U):
2515 This variable is the same as the man1dir variable, but is filename
2516 expanded at configuration time, for convenient use in makefiles.
2517
2518man1ext (man1dir.U):
2519 This variable contains the extension that the manual page should
2520 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2521 See man1dir.
2522
2523man3dir (man3dir.U):
2524 This variable contains the name of the directory in which manual
2525 source pages are to be put. It is the responsibility of the
2526 Makefile.SH to get the value of this into the proper command.
2527 You must be prepared to do the ~name expansion yourself.
2528
2529man3direxp (man3dir.U):
2530 This variable is the same as the man3dir variable, but is filename
2531 expanded at configuration time, for convenient use in makefiles.
2532
2533man3ext (man3dir.U):
2534 This variable contains the extension that the manual page should
2535 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2536 See man3dir.
2537
ff935051
JH
2538Mcc (Loc.U):
2539 This variable is used internally by Configure to determine the
2540 full pathname (if any) of the Mcc program. After Configure runs,
2541 the value is reset to a plain "Mcc" and is not useful.
2542
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JH
2543medium (models.U):
2544 This variable contains a flag which will tell the C compiler and loader
2545 to produce a program running with a medium memory model. If the
2546 medium model is not supported, contains the flag to produce large
2547 model programs. It is up to the Makefile to use this.
2548
2549mips_type (usrinc.U):
2550 This variable holds the environment type for the mips system.
2551 Possible values are "BSD 4.3" and "System V".
2552
2553mkdir (Loc.U):
5bf26616 2554 This variable is used internally by Configure to determine the
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JH
2555 full pathname (if any) of the mkdir program. After Configure runs,
2556 the value is reset to a plain "mkdir" and is not useful.
2557
fe749a9f
JH
2558mmaptype (d_mmap.U):
2559 This symbol contains the type of pointer returned by mmap()
2560 (and simultaneously the type of the first argument).
2561 It can be 'void *' or 'caddr_t'.
2562
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JH
2563models (models.U):
2564 This variable contains the list of memory models supported by this
2565 system. Possible component values are none, split, unsplit, small,
2566 medium, large, and huge. The component values are space separated.
2567
2568modetype (modetype.U):
2569 This variable defines modetype to be something like mode_t,
2570 int, unsigned short, or whatever type is used to declare file
2571 modes for system calls.
2572
2573more (Loc.U):
5bf26616 2574 This variable is used internally by Configure to determine the
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JH
2575 full pathname (if any) of the more program. After Configure runs,
2576 the value is reset to a plain "more" and is not useful.
2577
2578multiarch (multiarch.U):
2579 This variable conditionally defines the MULTIARCH symbol
2580 which signifies the presence of multiplatform files.
2581 This is normally set by hints files.
2582
2583mv (Loc.U):
2584 This variable is defined but not used by Configure.
2585 The value is a plain '' and is not useful.
2586
2587myarchname (archname.U):
2588 This variable holds the architecture name computed by Configure in
2589 a previous run. It is not intended to be perused by any user and
2590 should never be set in a hint file.
2591
2592mydomain (myhostname.U):
2593 This variable contains the eventual value of the MYDOMAIN symbol,
2594 which is the domain of the host the program is going to run on.
2595 The domain must be appended to myhostname to form a complete host name.
2596 The dot comes with mydomain, and need not be supplied by the program.
2597
2598myhostname (myhostname.U):
2599 This variable contains the eventual value of the MYHOSTNAME symbol,
2600 which is the name of the host the program is going to run on.
2601 The domain is not kept with hostname, but must be gotten from mydomain.
2602 The dot comes with mydomain, and need not be supplied by the program.
2603
2604myuname (Oldconfig.U):
2605 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2606 pseudo variables assignments in the output are stripped, thank you. The
2607 whole thing is then lower-cased.
2608
2609n (n.U):
2610 This variable contains the '-n' flag if that is what causes the echo
2611 command to suppress newline. Otherwise it is null. Correct usage is
2612 $echo $n "prompt for a question: $c".
2613
2614netdb_hlen_type (netdbtype.U):
2615 This variable holds the type used for the 2nd argument to
2616 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2617 This is only useful if you have gethostbyaddr(), naturally.
2618
2619netdb_host_type (netdbtype.U):
2620 This variable holds the type used for the 1st argument to
2621 gethostbyaddr(). Usually, this is char * or void *, possibly
2622 with or without a const prefix.
2623 This is only useful if you have gethostbyaddr(), naturally.
2624
2625netdb_name_type (netdbtype.U):
2626 This variable holds the type used for the argument to
2627 gethostbyname(). Usually, this is char * or const char *.
2628 This is only useful if you have gethostbyname(), naturally.
2629
2630netdb_net_type (netdbtype.U):
2631 This variable holds the type used for the 1st argument to
2632 getnetbyaddr(). Usually, this is int or long.
2633 This is only useful if you have getnetbyaddr(), naturally.
2634
2635nm (Loc.U):
5bf26616 2636 This variable is used internally by Configure to determine the
781b178c
JH
2637 full pathname (if any) of the nm program. After Configure runs,
2638 the value is reset to a plain "nm" and is not useful.
2639
2640nm_opt (usenm.U):
2641 This variable holds the options that may be necessary for nm.
2642
2643nm_so_opt (usenm.U):
2644 This variable holds the options that may be necessary for nm
2645 to work on a shared library but that can not be used on an
2646 archive library. Currently, this is only used by Linux, where
2647 nm --dynamic is *required* to get symbols from an ELF library which
2648 has been stripped, but nm --dynamic is *fatal* on an archive library.
2649 Maybe Linux should just always set usenm=false.
2650
2651nonxs_ext (Extensions.U):
2652 This variable holds a list of all non-xs extensions included
2653 in the package. All of them will be built.
2654
2655nroff (Loc.U):
5bf26616 2656 This variable is used internally by Configure to determine the
781b178c
JH
2657 full pathname (if any) of the nroff program. After Configure runs,
2658 the value is reset to a plain "nroff" and is not useful.
2659
a22e52b9
JH
2660nvsize (perlxv.U):
2661 This variable is the size of an NV in bytes.
2662
2663nvtype (perlxv.U):
2664 This variable contains the C type used for Perl's NV.
2665
781b178c
JH
2666o_nonblock (nblock_io.U):
2667 This variable bears the symbol value to be used during open() or fcntl()
2668 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2669 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2670 but that is only supported by some devices.
2671
2672obj_ext (Unix.U):
2673 This is an old synonym for _o.
2674
2675old_pthread_create_joinable (d_pthrattrj.U):
2676 This variable defines the constant to use for creating joinable
2677 (aka undetached) pthreads. Unused if pthread.h defines
2678 PTHREAD_CREATE_JOINABLE. If used, possible values are
2679 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2680
2681optimize (ccflags.U):
2682 This variable contains any optimizer/debugger flag that should be used.
2683 It is up to the Makefile to use it.
2684
2685orderlib (orderlib.U):
2686 This variable is "true" if the components of libraries must be ordered
2687 (with `lorder $* | tsort`) before placing them in an archive. Set to
2688 "false" if ranlib or ar can generate random libraries.
2689
2690osname (Oldconfig.U):
2691 This variable contains the operating system name (e.g. sunos,
2692 solaris, hpux, etc.). It can be useful later on for setting
2693 defaults. Any spaces are replaced with underscores. It is set
2694 to a null string if we can't figure it out.
2695
2696osvers (Oldconfig.U):
2697 This variable contains the operating system version (e.g.
2698 4.1.3, 5.2, etc.). It is primarily used for helping select
2699 an appropriate hints file, but might be useful elsewhere for
2700 setting defaults. It is set to '' if we can't figure it out.
2701 We try to be flexible about how much of the version number
2702 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2703 same for this package, hints files might just be os_4.0 or
2704 os_4.1, etc., not keeping separate files for each little release.
2705
2706package (package.U):
2707 This variable contains the name of the package being constructed.
2708 It is primarily intended for the use of later Configure units.
2709
2710pager (pager.U):
2711 This variable contains the name of the preferred pager on the system.
2712 Usual values are (the full pathnames of) more, less, pg, or cat.
2713
2714passcat (nis.U):
2715 This variable contains a command that produces the text of the
2716 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2717 "ypcat passwd" when NIS is used.
aaacdc8b
GS
2718 On some systems, such as os390, there may be no equivalent
2719 command, in which case this variable is unset.
781b178c
JH
2720
2721patchlevel (patchlevel.U):
2722 The patchlevel level of this package.
2723 The value of patchlevel comes from the patchlevel.h file.
ff935051
JH
2724 In a version number such as 5.6.1, this is the "6".
2725 In patchlevel.h, this is referred to as the "PERL_VERSION".
781b178c
JH
2726
2727path_sep (Unix.U):
2728 This is an old synonym for p_ in Head.U, the character
2729 used to separate elements in the command shell search PATH.
2730
2731perl (Loc.U):
aaacdc8b
GS
2732 This variable is used internally by Configure to determine the
2733 full pathname (if any) of the perl program. After Configure runs,
2734 the value is reset to a plain "perl" and is not useful.
781b178c 2735
ff935051
JH
2736PERL_REVISION (Oldsyms.U):
2737 In a Perl version number such as 5.6.2, this is the 5.
2738 This value is manually set in patchlevel.h
2739
2740PERL_SUBVERSION (Oldsyms.U):
2741 In a Perl version number such as 5.6.2, this is the 2.
2742 Values greater than 50 represent potentially unstable
2743 development subversions.
2744 This value is manually set in patchlevel.h
2745
2746PERL_VERSION (Oldsyms.U):
2747 In a Perl version number such as 5.6.2, this is the 6.
2748 This value is manually set in patchlevel.h
2749
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2750perladmin (perladmin.U):
2751 Electronic mail address of the perl5 administrator.
2752
2753perlpath (perlpath.U):
2754 This variable contains the eventual value of the PERLPATH symbol,
2755 which contains the name of the perl interpreter to be used in
2756 shell scripts and in the "eval 'exec'" idiom.
2757
2758pg (Loc.U):
5bf26616 2759 This variable is used internally by Configure to determine the
781b178c
JH
2760 full pathname (if any) of the pg program. After Configure runs,
2761 the value is reset to a plain "pg" and is not useful.
2762
2763phostname (myhostname.U):
2764 This variable contains the eventual value of the PHOSTNAME symbol,
2765 which is a command that can be fed to popen() to get the host name.
2766 The program should probably not presume that the domain is or isn't
2767 there already.
2768
2769pidtype (pidtype.U):
2770 This variable defines PIDTYPE to be something like pid_t, int,
2771 ushort, or whatever type is used to declare process ids in the kernel.
2772
2773plibpth (libpth.U):
2774 Holds the private path used by Configure to find out the libraries.
2775 Its value is prepend to libpth. This variable takes care of special
2776 machines, like the mips. Usually, it should be empty.
2777
fe749a9f
JH
2778pm_apiversion (xs_apiversion.U):
2779 This variable contains the version of the oldest perl
2780 compatible with the present perl. (That is, pure perl modules
2781 written for $pm_apiversion will still work for the current
2782 version). perl.c:incpush() and lib/lib.pm will automatically
2783 search in $sitelib for older directories across major versions
2784 back to pm_apiversion. This is only useful if you have a perl
2785 library directory tree structured like the default one. The
2786 versioned site_perl library was introduced in 5.005, so that's
2787 the default setting for this variable. It's hard to imagine
2788 it changing before Perl6. It is included here for symmetry
2789 with xs_apiveprsion -- the searching algorithms will
2790 (presumably) be similar.
2791 See the INSTALL file for how this works.
2792
781b178c
JH
2793pmake (Loc.U):
2794 This variable is defined but not used by Configure.
2795 The value is a plain '' and is not useful.
2796
2797pr (Loc.U):
2798 This variable is defined but not used by Configure.
2799 The value is a plain '' and is not useful.
2800
2801prefix (prefix.U):
2802 This variable holds the name of the directory below which the
2803 user will install the package. Usually, this is /usr/local, and
2804 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2805 man pages in /usr/local/man, etc. It is only used to set defaults
2806 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2807
2808prefixexp (prefix.U):
2809 This variable holds the full absolute path of the directory below
2810 which the user will install the package. Derived from prefix.
2811
2812privlib (privlib.U):
2813 This variable contains the eventual value of the PRIVLIB symbol,
2814 which is the name of the private library for this package. It may
2815 have a ~ on the front. It is up to the makefile to eventually create
2816 this directory while performing installation (with ~ substitution).
2817
2818privlibexp (privlib.U):
2819 This variable is the ~name expanded version of privlib, so that you
2820 may use it directly in Makefiles or shell scripts.
2821
2822prototype (prototype.U):
2823 This variable holds the eventual value of CAN_PROTOTYPE, which
2824 indicates the C compiler can handle funciton prototypes.
2825
2826ptrsize (ptrsize.U):
2827 This variable contains the value of the PTRSIZE symbol, which
2828 indicates to the C program how many bytes there are in a pointer.
2829
e0a10278 2830quadkind (quadtype.U):
0befd8de
JH
2831 This variable, if defined, encodes the type of a quad:
2832 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2833
2834quadtype (quadtype.U):
2835 This variable defines Quad_t to be something like long, int,
2836 long long, int64_t, or whatever type is used for 64-bit integers.
2837
781b178c
JH
2838randbits (randfunc.U):
2839 Indicates how many bits are produced by the function used to
2840 generate normalized random numbers.
2841
2842randfunc (randfunc.U):
2843 Indicates the name of the random number function to use.
2844 Values include drand48, random, and rand. In C programs,
2845 the 'Drand01' macro is defined to generate uniformly distributed
2846 random numbers over the range [0., 1.[ (see drand01 and nrand).
2847
2848randseedtype (randfunc.U):
2849 Indicates the type of the argument of the seedfunc.
2850
2851ranlib (orderlib.U):
2852 This variable is set to the pathname of the ranlib program, if it is
2853 needed to generate random libraries. Set to ":" if ar can generate
2854 random libraries or if random libraries are not supported
2855
2856rd_nodata (nblock_io.U):
2857 This variable holds the return code from read() when no data is
2858 present. It should be -1, but some systems return 0 when O_NDELAY is
2859 used, which is a shame because you cannot make the difference between
2860 no data and an EOF.. Sigh!
2861
2862rm (Loc.U):
5bf26616 2863 This variable is used internally by Configure to determine the
781b178c
JH
2864 full pathname (if any) of the rm program. After Configure runs,
2865 the value is reset to a plain "rm" and is not useful.
2866
2867rmail (Loc.U):
2868 This variable is defined but not used by Configure.
2869 The value is a plain '' and is not useful.
2870
2871runnm (usenm.U):
2872 This variable contains 'true' or 'false' depending whether the
2873 nm extraction should be performed or not, according to the value
2874 of usenm and the flags on the Configure command line.
2875
2876sched_yield (d_pthread_y.U):
2877 This variable defines the way to yield the execution
2878 of the current thread.
2879
2880scriptdir (scriptdir.U):
2881 This variable holds the name of the directory in which the user wants
2882 to put publicly scripts for the package in question. It is either
2883 the same directory as for binaries, or a special one that can be
2884 mounted across different architectures, like /usr/share. Programs
2885 must be prepared to deal with ~name expansion.
2886
2887scriptdirexp (scriptdir.U):
2888 This variable is the same as scriptdir, but is filename expanded
2889 at configuration time, for programs not wanting to bother with it.
2890
2891sed (Loc.U):
5bf26616 2892 This variable is used internally by Configure to determine the
781b178c
JH
2893 full pathname (if any) of the sed program. After Configure runs,
2894 the value is reset to a plain "sed" and is not useful.
2895
2896seedfunc (randfunc.U):
2897 Indicates the random number generating seed function.
2898 Values include srand48, srandom, and srand.
2899
2900selectminbits (selectminbits.U):
2901 This variable holds the minimum number of bits operated by select.
2902 That is, if you do select(n, ...), how many bits at least will be
2903 cleared in the masks if some activity is detected. Usually this
2904 is either n or 32*ceil(n/32), especially many little-endians do
2905 the latter. This is only useful if you have select(), naturally.
2906
2907selecttype (selecttype.U):
2908 This variable holds the type used for the 2nd, 3rd, and 4th
2909 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2910 is defined, and 'int *' otherwise. This is only useful if you
2911 have select(), naturally.
2912
2913sendmail (Loc.U):
ff935051
JH
2914 This variable is defined but not used by Configure.
2915 The value is a plain '' and is not useful.
781b178c
JH
2916
2917sh (sh.U):
2918 This variable contains the full pathname of the shell used
2919 on this system to execute Bourne shell scripts. Usually, this will be
2920 /bin/sh, though it's possible that some systems will have /bin/ksh,
2921 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2922 D:/bin/sh.exe.
2923 This unit comes before Options.U, so you can't set sh with a '-D'
2924 option, though you can override this (and startsh)
2925 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2926
2927shar (Loc.U):
2928 This variable is defined but not used by Configure.
2929 The value is a plain '' and is not useful.
2930
2931sharpbang (spitshell.U):
2932 This variable contains the string #! if this system supports that
2933 construct.
2934
2935shmattype (d_shmat.U):
2936 This symbol contains the type of pointer returned by shmat().
2937 It can be 'void *' or 'char *'.
2938
2939shortsize (intsize.U):
2940 This variable contains the value of the SHORTSIZE symbol which
2941 indicates to the C program how many bytes there are in a short.
2942
2943shrpenv (libperl.U):
2944 If the user builds a shared libperl.so, then we need to tell the
2945 'perl' executable where it will be able to find the installed libperl.so.
2946 One way to do this on some systems is to set the environment variable
2947 LD_RUN_PATH to the directory that will be the final location of the
2948 shared libperl.so. The makefile can use this with something like
2949 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2950 Typical values are
2951 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2952 or
2953 shrpenv=''
2954 See the main perl Makefile.SH for actual working usage.
2955 Alternatively, we might be able to use a command line option such
2956 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2957 $archlibexp/CORE (Linux).
2958
2959shsharp (spitshell.U):
2960 This variable tells further Configure units whether your sh can
2961 handle # comments.
2962
2963sig_count (sig_name.U):
2964 This variable holds a number larger than the largest valid
2965 signal number. This is usually the same as the NSIG macro.
2966
2967sig_name (sig_name.U):
2968 This variable holds the signal names, space separated. The leading
2969 SIG in signal name is removed. A ZERO is prepended to the
2970 list. This is currently not used.
2971
2972sig_name_init (sig_name.U):
2973 This variable holds the signal names, enclosed in double quotes and
2974 separated by commas, suitable for use in the SIG_NAME definition
2975 below. A "ZERO" is prepended to the list, and the list is
2976 terminated with a plain 0. The leading SIG in signal names
2977 is removed. See sig_num.
2978
2979sig_num (sig_name.U):
2980 This variable holds the signal numbers, space separated. A ZERO is
2981 prepended to the list (corresponding to the fake SIGZERO), and
2982 the list is terminated with a 0. Those numbers correspond to
2983 the value of the signal listed in the same place within the
2984 sig_name list.
2985
2986sig_num_init (sig_name.U):
2987 This variable holds the signal numbers, enclosed in double quotes and
2988 separated by commas, suitable for use in the SIG_NUM definition
2989 below. A "ZERO" is prepended to the list, and the list is
2990 terminated with a plain 0.
2991
2992signal_t (d_voidsig.U):
2993 This variable holds the type of the signal handler (void or int).
2994
2995sitearch (sitearch.U):
2996 This variable contains the eventual value of the SITEARCH symbol,
2997 which is the name of the private library for this package. It may
2998 have a ~ on the front. It is up to the makefile to eventually create
2999 this directory while performing installation (with ~ substitution).
f868067f
JH
3000 The standard distribution will put nothing in this directory.
3001 After perl has been installed, users may install their own local
3002 architecture-dependent modules in this directory with
3003 MakeMaker Makefile.PL
3004 or equivalent. See INSTALL for details.
781b178c
JH
3005
3006sitearchexp (sitearch.U):
3007 This variable is the ~name expanded version of sitearch, so that you
3008 may use it directly in Makefiles or shell scripts.
3009
0617aed7
JH
3010sitebin (sitebin.U):
3011 This variable holds the name of the directory in which the user wants
3012 to put add-on publicly executable files for the package in question. It
3013 is most often a local directory such as /usr/local/bin. Programs using
3014 this variable must be prepared to deal with ~name substitution.
f868067f
JH
3015 The standard distribution will put nothing in this directory.
3016 After perl has been installed, users may install their own local
3017 executables in this directory with
3018 MakeMaker Makefile.PL
3019 or equivalent. See INSTALL for details.
0617aed7
JH
3020
3021sitebinexp (sitebin.U):
3022 This is the same as the sitebin variable, but is filename expanded at
3023 configuration time, for use in your makefiles.
3024
781b178c
JH
3025sitelib (sitelib.U):
3026 This variable contains the eventual value of the SITELIB symbol,
3027 which is the name of the private library for this package. It may
3028 have a ~ on the front. It is up to the makefile to eventually create
3029 this directory while performing installation (with ~ substitution).
f868067f
JH
3030 The standard distribution will put nothing in this directory.
3031 After perl has been installed, users may install their own local
3032 architecture-independent modules in this directory with
3033 MakeMaker Makefile.PL
3034 or equivalent. See INSTALL for details.
781b178c
JH
3035
3036sitelibexp (sitelib.U):
3037 This variable is the ~name expanded version of sitelib, so that you
3038 may use it directly in Makefiles or shell scripts.
3039
3040siteprefix (siteprefix.U):
3041 This variable holds the full absolute path of the directory below
3042 which the user will install add-on packages.
f868067f 3043 See INSTALL for usage and examples.
781b178c
JH
3044
3045siteprefixexp (siteprefix.U):
3046 This variable holds the full absolute path of the directory below
3047 which the user will install add-on packages. Derived from siteprefix.
3048
3049sizetype (sizetype.U):
3050 This variable defines sizetype to be something like size_t,
3051 unsigned long, or whatever type is used to declare length
3052 parameters for string functions.
3053
3054sleep (Loc.U):
3055 This variable is defined but not used by Configure.
3056 The value is a plain '' and is not useful.
3057
3058smail (Loc.U):
3059 This variable is defined but not used by Configure.
3060 The value is a plain '' and is not useful.
3061
3062small (models.U):
3063 This variable contains a flag which will tell the C compiler and loader
3064 to produce a program running with a small memory model. It is up to
3065 the Makefile to use this.
3066
3067so (so.U):
3068 This variable holds the extension used to identify shared libraries
3069 (also known as shared objects) on the system. Usually set to 'so'.
3070
3071sockethdr (d_socket.U):
3072 This variable has any cpp '-I' flags needed for socket support.
3073
3074socketlib (d_socket.U):
3075 This variable has the names of any libraries needed for socket support.
3076
3077sort (Loc.U):
5bf26616 3078 This variable is used internally by Configure to determine the
781b178c
JH
3079 full pathname (if any) of the sort program. After Configure runs,
3080 the value is reset to a plain "sort" and is not useful.
3081
3082spackage (package.U):
3083 This variable contains the name of the package being constructed,
3084 with the first letter uppercased, i.e. suitable for starting
3085 sentences.
3086
3087spitshell (spitshell.U):
3088 This variable contains the command necessary to spit out a runnable
3089 shell on this system. It is either cat or a grep '-v' for # comments.
3090
3091split (models.U):
3092 This variable contains a flag which will tell the C compiler and loader
3093 to produce a program that will run in separate I and D space, for those
3094 machines that support separation of instruction and data space. It is
3095 up to the Makefile to use this.
3096
ff935051
JH
3097sPRId64 (quadfio.U):
3098 This variable, if defined, contains the string used by stdio to
3099 format 64-bit decimal numbers (format 'd') for output.
3100
3101sPRIeldbl (longdblfio.U):
3102 This variable, if defined, contains the string used by stdio to
3103 format long doubles (format 'e') for output.
3104
3105sPRIEldbl (longdblfio.U):
3106 This variable, if defined, contains the string used by stdio to
3107 format long doubles (format 'E') for output.
3108
3109sPRIfldbl (longdblfio.U):
3110 This variable, if defined, contains the string used by stdio to
3111 format long doubles (format 'f') for output.
3112
3113sPRIFldbl (longdblfio.U):
3114 This variable, if defined, contains the string used by stdio to
3115 format long doubles (format 'F') for output.
3116
3117sPRIgldbl (longdblfio.U):
3118 This variable, if defined, contains the string used by stdio to
3119 format long doubles (format 'g') for output.
3120
3121sPRIGldbl (longdblfio.U):
3122 This variable, if defined, contains the string used by stdio to
3123 format long doubles (format 'G') for output.
3124
3125sPRIi64 (quadfio.U):
3126 This variable, if defined, contains the string used by stdio to
3127 format 64-bit decimal numbers (format 'i') for output.
3128
3129sPRIo64 (quadfio.U):
3130 This variable, if defined, contains the string used by stdio to
3131 format 64-bit octal numbers (format 'o') for output.
3132
3133sPRIu64 (quadfio.U):
3134 This variable, if defined, contains the string used by stdio to
3135 format 64-bit unsigned decimal numbers (format 'u') for output.
3136
3137sPRIx64 (quadfio.U):
3138 This variable, if defined, contains the string used by stdio to
3139 format 64-bit hexadecimal numbers (format 'x') for output.
3140
3141sPRIX64 (quadfio.U):
3142 This variable, if defined, contains the string used by stdio to
3143 format 64-bit hExADECimAl numbers (format 'X') for output.
3144
781b178c
JH
3145src (src.U):
3146 This variable holds the path to the package source. It is up to
3147 the Makefile to use this variable and set VPATH accordingly to
3148 find the sources remotely.
3149
3150ssizetype (ssizetype.U):
3151 This variable defines ssizetype to be something like ssize_t,
3152 long or int. It is used by functions that return a count
3153 of bytes or an error condition. It must be a signed type.
3154 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3155
3156startperl (startperl.U):
3157 This variable contains the string to put on the front of a perl
3158 script to make sure (hopefully) that it runs with perl and not some
3159 shell. Of course, that leading line must be followed by the classical
3160 perl idiom:
3161 eval 'exec perl -S $0 ${1+"$@"}'
3162 if $running_under_some_shell;
3163 to guarantee perl startup should the shell execute the script. Note
3164 that this magic incatation is not understood by csh.
3165
3166startsh (startsh.U):
3167 This variable contains the string to put on the front of a shell
3168 script to make sure (hopefully) that it runs with sh and not some
3169 other shell.
3170
3171static_ext (Extensions.U):
3172 This variable holds a list of XS extension files we want to
3173 link statically into the package. It is used by Makefile.
3174
3175stdchar (stdchar.U):
3176 This variable conditionally defines STDCHAR to be the type of char
3177 used in stdio.h. It has the values "unsigned char" or "char".
3178
3179stdio_base (d_stdstdio.U):
3180 This variable defines how, given a FILE pointer, fp, to access the
3181 _base field (or equivalent) of stdio.h's FILE structure. This will
3182 be used to define the macro FILE_base(fp).
3183
3184stdio_bufsiz (d_stdstdio.U):
3185 This variable defines how, given a FILE pointer, fp, to determine
3186 the number of bytes store in the I/O buffer pointer to by the
3187 _base field (or equivalent) of stdio.h's FILE structure. This will
3188 be used to define the macro FILE_bufsiz(fp).
3189
3190stdio_cnt (d_stdstdio.U):
3191 This variable defines how, given a FILE pointer, fp, to access the
3192 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3193 be used to define the macro FILE_cnt(fp).
3194
3195stdio_filbuf (d_stdstdio.U):
3196 This variable defines how, given a FILE pointer, fp, to tell
3197 stdio to refill it's internal buffers (?). This will
3198 be used to define the macro FILE_filbuf(fp).
3199
3200stdio_ptr (d_stdstdio.U):
3201 This variable defines how, given a FILE pointer, fp, to access the
3202 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3203 be used to define the macro FILE_ptr(fp).
3204
3205stdio_stream_array (stdio_streams.U):
3206 This variable tells the name of the array holding the stdio streams.
3207 Usual values include _iob, __iob, and __sF.
3208
3209strings (i_string.U):
3210 This variable holds the full path of the string header that will be
3211 used. Typically /usr/include/string.h or /usr/include/strings.h.
3212
3213submit (Loc.U):
3214 This variable is defined but not used by Configure.
3215 The value is a plain '' and is not useful.
3216
3217subversion (patchlevel.U):
3218 The subversion level of this package.
3219 The value of subversion comes from the patchlevel.h file.
ff935051 3220 In a version number such as 5.6.1, this is the "1".
781b178c
JH
3221 This is unique to perl.
3222
3223sysman (sysman.U):
3224 This variable holds the place where the manual is located on this
3225 system. It is not the place where the user wants to put his manual
3226 pages. Rather it is the place where Configure may look to find manual
3227 for unix commands (section 1 of the manual usually). See mansrc.
3228
3229tail (Loc.U):
3230 This variable is defined but not used by Configure.
3231 The value is a plain '' and is not useful.
3232
3233tar (Loc.U):
3234 This variable is defined but not used by Configure.
3235 The value is a plain '' and is not useful.
3236
3237tbl (Loc.U):
3238 This variable is defined but not used by Configure.
3239 The value is a plain '' and is not useful.
3240
3241tee (Loc.U):
3242 This variable is defined but not used by Configure.
3243 The value is a plain '' and is not useful.
3244
3245test (Loc.U):
5bf26616 3246 This variable is used internally by Configure to determine the
781b178c
JH
3247 full pathname (if any) of the test program. After Configure runs,
3248 the value is reset to a plain "test" and is not useful.
3249
3250timeincl (i_time.U):
3251 This variable holds the full path of the included time header(s).
3252
3253timetype (d_time.U):
3254 This variable holds the type returned by time(). It can be long,
3255 or time_t on BSD sites (in which case <sys/types.h> should be
3256 included). Anyway, the type Time_t should be used.
3257
3258touch (Loc.U):
5bf26616 3259 This variable is used internally by Configure to determine the
781b178c
JH
3260 full pathname (if any) of the touch program. After Configure runs,
3261 the value is reset to a plain "touch" and is not useful.
3262
3263tr (Loc.U):
5bf26616 3264 This variable is used internally by Configure to determine the
781b178c
JH
3265 full pathname (if any) of the tr program. After Configure runs,
3266 the value is reset to a plain "tr" and is not useful.
3267
3268trnl (trnl.U):
3269 This variable contains the value to be passed to the tr(1)
3270 command to transliterate a newline. Typical values are
3271 '\012' and '\n'. This is needed for EBCDIC systems where
3272 newline is not necessarily '\012'.
3273
3274troff (Loc.U):
3275 This variable is defined but not used by Configure.
3276 The value is a plain '' and is not useful.
3277
a22e52b9
JH
3278u16size (perlxv.U):
3279 This variable is the size of an U16 in bytes.
3280
3281u16type (perlxv.U):
3282 This variable contains the C type used for Perl's U16.
3283
3284u32size (perlxv.U):
3285 This variable is the size of an U32 in bytes.
3286
3287u32type (perlxv.U):
3288 This variable contains the C type used for Perl's U32.
3289
3290u64size (perlxv.U):
3291 This variable is the size of an U64 in bytes.
3292
3293u64type (perlxv.U):
3294 This variable contains the C type used for Perl's U64.
3295
3296u8size (perlxv.U):
3297 This variable is the size of an U8 in bytes.
3298
3299u8type (perlxv.U):
3300 This variable contains the C type used for Perl's U8.
3301
3302uidformat (uidf.U):
3303 This variable contains the format string used for printing a Uid_t.
3304
2d228ff3
JH
3305uidsign (uidsign.U):
3306 This variable contains the signedness of a uidtype.
3307 1 for unsigned, -1 for signed.
3308
785fb66b
JH
3309uidsize (uidsize.U):
3310 This variable contains the size of a uidtype in bytes.
3311
781b178c
JH
3312uidtype (uidtype.U):
3313 This variable defines Uid_t to be something like uid_t, int,
3314 ushort, or whatever type is used to declare user ids in the kernel.
3315
3316uname (Loc.U):
5bf26616 3317 This variable is used internally by Configure to determine the
781b178c
JH
3318 full pathname (if any) of the uname program. After Configure runs,
3319 the value is reset to a plain "uname" and is not useful.
3320
3321uniq (Loc.U):
5bf26616 3322 This variable is used internally by Configure to determine the
781b178c
JH
3323 full pathname (if any) of the uniq program. After Configure runs,
3324 the value is reset to a plain "uniq" and is not useful.
3325
0befd8de
JH
3326uquadtype (quadtype.U):
3327 This variable defines Uquad_t to be something like unsigned long,
3328 unsigned int, unsigned long long, uint64_t, or whatever type is
3329 used for 64-bit integers.
3330
aaacdc8b
GS
3331use5005threads (usethreads.U):
3332 This variable conditionally defines the USE_5005THREADS symbol,
3333 and indicates that Perl should be built to use the 5.005-based
3334 threading implementation.
3335
781b178c
JH
3336use64bits (use64bits.U):
3337 This variable conditionally defines the USE_64_BITS symbol,
aaacdc8b 3338 and indicates that 64-bit integer types should be used
781b178c
JH
3339 when available.
3340
3341usedl (dlsrc.U):
ff935051 3342 This variable indicates if the system supports dynamic
781b178c
JH
3343 loading of some sort. See also dlsrc and dlobj.
3344
aaacdc8b
GS
3345useithreads (usethreads.U):
3346 This variable conditionally defines the USE_ITHREADS symbol,
3347 and indicates that Perl should be built to use the interpreter-based
3348 threading implementation.
3349
5bf26616 3350uselargefiles (uselfs.U):
1baac590
JH
3351 This variable conditionally defines the USE_LARGE_FILES symbol,
3352 and indicates that large file interfaces should be used when
3353 available. The use64bits symbol will also be turned on if necessary.
3354
ca24dfc6
LV
3355uselongdouble (uselongdbl.U):
3356 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3357 and indicates that long doubles should be used when available.
3358
1baac590
JH
3359usemorebits (usemorebits.U):
3360 This variable conditionally defines the USE_MORE_BITS symbol,
3361 and indicates that explicit 64-bit interfaces and long doubles
3362 should be used when available.
3363
781b178c
JH
3364usemultiplicity (usemultiplicity.U):
3365 This variable conditionally defines the MULTIPLICITY symbol,
3366 and indicates that Perl should be built to use multiplicity.
3367
3368usemymalloc (mallocsrc.U):
3369 This variable contains y if the malloc that comes with this package
3370 is desired over the system's version of malloc. People often include
3371 special versions of malloc for effiency, but such versions are often
3372 less portable. See also mallocsrc and mallocobj.
3373 If this is 'y', then -lmalloc is removed from $libs.
3374
3375usenm (usenm.U):
3376 This variable contains 'true' or 'false' depending whether the
3377 nm extraction is wanted or not.
3378
3379useopcode (Extensions.U):
3380 This variable holds either 'true' or 'false' to indicate
3381 whether the Opcode extension should be used. The sole
3382 use for this currently is to allow an easy mechanism
3383 for users to skip the Opcode extension from the Configure
3384 command line.
3385
3386useperlio (useperlio.U):
3387 This variable conditionally defines the USE_PERLIO symbol,
3388 and indicates that the PerlIO abstraction should be
3389 used throughout.
3390
3391useposix (Extensions.U):
3392 This variable holds either 'true' or 'false' to indicate
3393 whether the POSIX extension should be used. The sole
3394 use for this currently is to allow an easy mechanism
3395 for hints files to indicate that POSIX will not compile
3396 on a particular system.
3397
3398usesfio (d_sfio.U):
3399 This variable is set to true when the user agrees to use sfio.
3400 It is set to false when sfio is not available or when the user
3401 explicitely requests not to use sfio. It is here primarily so
3402 that command-line settings can override the auto-detection of
3403 d_sfio without running into a "WHOA THERE".
3404
3405useshrplib (libperl.U):
3406 This variable is set to 'yes' if the user wishes
3407 to build a shared libperl, and 'no' otherwise.
3408
3409usesocks (usesocks.U):
3410 This variable conditionally defines the USE_SOCKS symbol,
3411 and indicates that Perl should be built to use SOCKS.
3412
3413usethreads (usethreads.U):
3414 This variable conditionally defines the USE_THREADS symbol,
3415 and indicates that Perl should be built to use threads.
3416
9f50e519
NA
3417usevendorprefix (vendorprefix.U):
3418 This variable tells whether the vendorprefix
3419 and consequently other vendor* paths are in use.
3420
781b178c
JH
3421usevfork (d_vfork.U):
3422 This variable is set to true when the user accepts to use vfork.
3423 It is set to false when no vfork is available or when the user
3424 explicitely requests not to use vfork.
3425
3426usrinc (usrinc.U):
3427 This variable holds the path of the include files, which is
3428 usually /usr/include. It is mainly used by other Configure units.
3429
3430uuname (Loc.U):
3431 This variable is defined but not used by Configure.
3432 The value is a plain '' and is not useful.
3433
a22e52b9
JH
3434uvoformat (perlxvf.U):
3435 This variable contains the format string used for printing
3436 a Perl UV as an unsigned octal integer.
3437
3438uvsize (perlxv.U):
3439 This variable is the size of a UV in bytes.
3440
3441uvtype (perlxv.U):
3442 This variable contains the C type used for Perl's UV.
3443
3444uvuformat (perlxvf.U):
3445 This variable contains the format string used for printing
3446 a Perl UV as an unsigned decimal integer.
3447
3448uvxformat (perlxvf.U):
3449 This variable contains the format string used for printing
3450 a Perl UV as an unsigned hexadecimal integer.
3451
0617aed7 3452vendorbin (vendorbin.U):
f868067f
JH
3453 This variable contains the eventual value of the VENDORBIN symbol.
3454 It may have a ~ on the front.
3455 The standard distribution will put nothing in this directory.
3456 Vendors who distribute perl may wish to place additional
3457 binaries in this directory with
3458 MakeMaker Makefile.PL INSTALLDIRS=vendor
3459 or equivalent. See INSTALL for details.
0617aed7
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3460
3461vendorbinexp (vendorbin.U):
3462 This variable is the ~name expanded version of vendorbin, so that you
3463 may use it directly in Makefiles or shell scripts.
3464
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3465vendorlib (vendorlib.U):
3466 This variable contains the eventual value of the VENDORLIB symbol,
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3467 which is the name of the private library for this package.
3468 The standard distribution will put nothing in this directory.
3469 Vendors who distribute perl may wish to place their own
3470 modules in this directory with
3471 MakeMaker Makefile.PL INSTALLDIRS=vendor
3472 or equivalent. See INSTALL for details.
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3473
3474vendorlibexp (vendorlib.U):
3475 This variable is the ~name expanded version of vendorlib, so that you
3476 may use it directly in Makefiles or shell scripts.
3477
3478vendorprefix (vendorprefix.U):
3479 This variable holds the full absolute path of the directory below
3480 which the vendor will install add-on packages.
f868067f 3481 See INSTALL for usage and examples.
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3482
3483vendorprefixexp (vendorprefix.U):
3484 This variable holds the full absolute path of the directory below
3485 which the vendor will install add-on packages. Derived from vendorprefix.
3486
781b178c 3487version (patchlevel.U):
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3488 The full version number of this package, such as 5.6.1 (or 5_6_1).
3489 This combines baserev, patchlevel, and subversion to get the
3490 full version number, including any possible subversions.
3491 This is suitable for use as a directory name, and hence is
3492 filesystem dependent.
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3493
3494vi (Loc.U):
3495 This variable is defined but not used by Configure.
3496 The value is a plain '' and is not useful.
3497
3498voidflags (voidflags.U):
3499 This variable contains the eventual value of the VOIDFLAGS symbol,
3500 which indicates how much support of the void type is given by this
3501 compiler. See VOIDFLAGS for more info.
3502
3503xlibpth (libpth.U):
3504 This variable holds extra path (space-separated) used to find
3505 libraries on this platform, for example CPU-specific libraries
3506 (on multi-CPU platforms) may be listed here.
3507
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3508xs_apiversion (xs_apiversion.U):
3509 This variable contains the version of the oldest perl binary
3510 compatible with the present perl. perl.c:incpush() and
3511 lib/lib.pm will automatically search in $sitearch for older
3512 directories across major versions back to xs_apiversion.
3513 This is only useful if you have a perl library directory tree
3514 structured like the default one.
3515 See INSTALL for how this works.
3516 The versioned site_perl directory was introduced in 5.005,
3517 so that is the lowest possible value.
3518 Since this can depend on compile time options (such as
3519 bincompat) it is set by Configure. Other non-default sources
3520 of potential incompatibility, such as multiplicity, threads,
3521 debugging, 64bits, sfio, etc., are not checked for currently,
3522 though in principle we could go snooping around in old
3523 Config.pm files.
3524
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3525zcat (Loc.U):
3526 This variable is defined but not used by Configure.
3527 The value is a plain '' and is not useful.
3528
3529zip (Loc.U):
5bf26616 3530 This variable is used internally by Configure to determine the
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3531 full pathname (if any) of the zip program. After Configure runs,
3532 the value is reset to a plain "zip" and is not useful.
3533