1 # This file is part of Autoconf. -*- Autoconf -*-
2 # M4 sugar for common shell constructs.
3 # Requires GNU M4 and M4sugar.
5 # Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
6 # Free Software Foundation, Inc.
8 # This program is free software: you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 2, or (at your option)
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program; if not, write to the Free Software
20 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 # As a special exception, the Free Software Foundation gives unlimited
24 # permission to copy, distribute and modify the configure scripts that
25 # are the output of Autoconf. You need not follow the terms of the GNU
26 # General Public License when using or distributing such scripts, even
27 # though portions of the text of Autoconf appear in them. The GNU
28 # General Public License (GPL) does govern all other use of the material
29 # that constitutes the Autoconf program.
31 # Certain portions of the Autoconf source text are designed to be copied
32 # (in certain cases, depending on the input) into the output of
33 # Autoconf. We call these the "data" portions. The rest of the Autoconf
34 # source text consists of comments plus executable code that decides which
35 # of the data portions to output in any given case. We call these
36 # comments and executable code the "non-data" portions. Autoconf never
37 # copies any of the non-data portions into its output.
39 # This special exception to the GPL applies to versions of Autoconf
40 # released by the Free Software Foundation. When you make and
41 # distribute a modified version of Autoconf, you may extend this special
42 # exception to the GPL to apply to your modified version as well, *unless*
43 # your modified version has the potential to copy into its output some
44 # of the text that was the non-data portion of the version that you started
45 # with. (In other words, unless your change moves or copies text from
46 # the non-data portions to the data portions.) If your modification has
47 # such potential, you must delete any notice of this special exception
48 # to the GPL from your modified version.
50 # Written by Akim Demaille, Pavel Roskin, Alexandre Oliva, Lars J. Aas
51 # and many other people.
54 # We heavily use m4's diversions both for the initializations and for
55 # required macros, because in both cases we have to issue soon in
56 # output something which is discovered late.
59 # KILL is only used to suppress output.
62 # AC_REQUIRE'd #! /bin/sh line
66 # Purpose of the script etc.
72 # M4sh initialization (shell functions)
74 # M4sh initialization (detection code)
76 # The body of the script.
79 # _m4_divert(DIVERSION-NAME)
80 # --------------------------
81 # Convert a diversion name into its number. Otherwise, return
82 # DIVERSION-NAME which is supposed to be an actual diversion number.
83 # Of course it would be nicer to use m4_case here, instead of zillions
84 # of little macros, but it then takes twice longer to run `autoconf'!
85 m4_define([_m4_divert(BINSH)], 0)
86 m4_define([_m4_divert(HEADER-REVISION)], 1)
87 m4_define([_m4_divert(HEADER-COMMENT)], 2)
88 m4_define([_m4_divert(HEADER-COPYRIGHT)], 3)
89 m4_define([_m4_divert(M4SH-SANITIZE)], 4)
90 m4_define([_m4_divert(M4SH-INIT-FN)], 5)
91 m4_define([_m4_divert(M4SH-INIT)], 6)
92 m4_define([_m4_divert(BODY)], 1000)
94 # Aaarg. Yet it starts with compatibility issues... Libtool wants to
95 # use NOTICE to insert its own LIBTOOL-INIT stuff. People should ask
96 # before diving into our internals :(
97 m4_copy([_m4_divert(M4SH-INIT)], [_m4_divert(NOTICE)])
101 ## ------------------------- ##
102 ## 1. Sanitizing the shell. ##
103 ## ------------------------- ##
104 # Please maintain lexicographic sorting of this section, ignoring leading _.
106 # AS_BOURNE_COMPATIBLE
107 # --------------------
108 # Try to be as Bourne and/or POSIX as possible.
110 # This does not set BIN_SH, due to the problems described in
111 # <http://lists.gnu.org/archive/html/autoconf-patches/2006-03/msg00081.html>.
112 # People who need BIN_SH should set it in their environment before invoking
113 # configure; apparently this would include UnixWare, as described in
114 # <http://lists.gnu.org/archive/html/bug-autoconf/2006-06/msg00025.html>.
115 m4_define([AS_BOURNE_COMPATIBLE],
116 [# Be more Bourne compatible
117 DUALCASE=1; export DUALCASE # for MKS sh
121 # _AS_BOURNE_COMPATIBLE
122 # ---------------------
123 # This is the part of AS_BOURNE_COMPATIBLE which has to be repeated inside
125 m4_define([_AS_BOURNE_COMPATIBLE],
126 [AS_IF([test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1],
129 [#] Pre-4.2 versions of Zsh do word splitting on ${1+"$[@]"}, which
130 # is contrary to our usage. Disable this feature.
131 alias -g '${1+"$[@]"}'='"$[@]"'
132 setopt NO_GLOB_SUBST],
133 [AS_CASE([`(set -o) 2>/dev/null`], [*posix*], [set -o posix])])
139 # Expanded as the last thing before m4sugar cleanup begins. Macros
140 # may append m4sh cleanup hooks to this as appropriate.
141 m4_define([_AS_CLEANUP],
142 [m4_divert_text([M4SH-SANITIZE], [_AS_DETECT_BETTER_SHELL])])
147 # Emit TEXT, a copyright notice, as a shell comment near the top of the
148 # script. TEXT is evaluated once; to accomplish that, we do not prepend
150 m4_define([AS_COPYRIGHT],
151 [m4_divert_text([HEADER-COPYRIGHT],
153 $1], [^], [@%:@ ])])])
156 # _AS_DETECT_EXPAND(VAR, SET)
157 # ---------------------------
158 # Assign the contents of VAR from the contents of SET, expanded in such
159 # a manner that VAR can be passed to _AS_RUN. In order to make
160 # _AS_LINENO_WORKS operate correctly, we must specially handle the
161 # first instance of $LINENO within any line being expanded (the first
162 # instance is important to tests using the current shell, leaving
163 # remaining instances for tests using a candidate shell). Bash loses
164 # track of line numbers if a double quote contains a newline, hence,
165 # we must piece-meal the assignment of VAR such that $LINENO expansion
166 # occurs in a single line.
167 m4_define([_AS_DETECT_EXPAND],
168 [$1="m4_bpatsubst(m4_dquote(AS_ESCAPE(m4_expand(m4_set_contents([$2], [
169 ])))), [\\\$LINENO\(.*\)$], [";$1=$$1$LINENO;$1=$$1"\1])"])
172 # _AS_DETECT_REQUIRED(TEST)
173 # -------------------------
174 # Refuse to execute under a shell that does not pass the given TEST.
175 # Does not do AS_REQUIRE for the better-shell detection code.
177 # M4sh should never require something not required by POSIX, although
178 # other clients are free to do so.
179 m4_defun([_AS_DETECT_REQUIRED],
180 [m4_set_add([_AS_DETECT_REQUIRED_BODY], [$1 || AS_EXIT])])
183 # _AS_DETECT_SUGGESTED(TEST)
184 # --------------------------
185 # Prefer to execute under a shell that passes the given TEST.
186 # Does not do AS_REQUIRE for the better-shell detection code.
188 # M4sh should never suggest something not required by POSIX, although
189 # other clients are free to do so.
190 m4_defun([_AS_DETECT_SUGGESTED],
191 [m4_set_add([_AS_DETECT_SUGGESTED_BODY], [$1 || AS_EXIT])])
194 # _AS_DETECT_SUGGESTED_PRUNE(TEST)
195 # --------------------------------
196 # If TEST is also a required test, remove it from the set of suggested tests.
197 m4_define([_AS_DETECT_SUGGESTED_PRUNE],
198 [m4_set_contains([_AS_DETECT_REQUIRED_BODY], [$1],
199 [m4_set_remove([_AS_DETECT_SUGGESTED_BODY], [$1])])])
202 # _AS_DETECT_BETTER_SHELL
203 # -----------------------
204 # The real workhorse for detecting a shell with the correct
207 # In previous versions, we prepended /usr/posix/bin to the path, but that
208 # caused a regression on OpenServer 6.0.0
209 # <http://lists.gnu.org/archive/html/bug-autoconf/2006-06/msg00017.html>
210 # and on HP-UX 11.11, see the failure of test 120 in
211 # <http://lists.gnu.org/archive/html/bug-autoconf/2006-10/msg00003.html>
213 # FIXME: The code should test for the OSF bug described in
214 # <http://lists.gnu.org/archive/html/autoconf-patches/2006-03/msg00081.html>.
216 # This code is run outside any trap 0 context, hence we can simplify AS_EXIT.
217 m4_defun([_AS_DETECT_BETTER_SHELL],
218 dnl Remove any tests from suggested that are also required
219 [m4_set_map([_AS_DETECT_SUGGESTED_BODY], [_AS_DETECT_SUGGESTED_PRUNE])]dnl
220 [m4_pushdef([AS_EXIT], [exit m4_default([$1], 1)])]dnl
221 [if test "x$CONFIG_SHELL" = x; then
222 as_bourne_compatible="AS_ESCAPE(m4_expand([_AS_BOURNE_COMPATIBLE]))"
223 _AS_DETECT_EXPAND([as_required], [_AS_DETECT_REQUIRED_BODY])
224 _AS_DETECT_EXPAND([as_suggested], [_AS_DETECT_SUGGESTED_BODY])
225 AS_IF([_AS_RUN(["$as_required"])],
226 [as_have_required=yes],
227 [as_have_required=no])
228 AS_IF([test x$as_have_required = xyes && _AS_RUN(["$as_suggested"])],
230 [_AS_PATH_WALK([/bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH],
231 [case $as_dir in @%:@(
233 for as_base in sh bash ksh sh5; do
234 # Try only shells that exist, to save several forks.
235 as_shell=$as_dir/$as_base
236 AS_IF([{ test -f "$as_shell" || test -f "$as_shell.exe"; } &&
237 _AS_RUN(["$as_required"], ["$as_shell"])],
238 [CONFIG_SHELL=$as_shell as_have_required=yes
239 m4_set_empty([_AS_DETECT_SUGGESTED_BODY], [break 2],
240 [AS_IF([_AS_RUN(["$as_suggested"], ["$as_shell"])],
244 [AS_IF([{ test -f "$SHELL" || test -f "$SHELL.exe"; } &&
245 _AS_RUN(["$as_required"], ["$SHELL"])],
246 [CONFIG_SHELL=$SHELL as_have_required=yes])])
248 AS_IF([test "x$CONFIG_SHELL" != x],
249 [# We cannot yet assume a decent shell, so we have to provide a
250 # neutralization value for shells without unset; and this also
251 # works around shells that cannot unset nonexistent variables.
254 (unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
256 exec "$CONFIG_SHELL" "$as_myself" ${1+"$[@]"}])
258 dnl Unfortunately, $as_me isn't available here.
259 AS_IF([test x$as_have_required = xno],
260 [AS_ECHO(["$[]0: This script requires a shell more modern than all"])
261 AS_ECHO(["$[]0: the shells that I found on your system."])
262 if test x${ZSH_VERSION+set} = xset ; then
263 AS_ECHO(["$[]0: In particular, zsh $ZSH_VERSION has bugs and should"])
264 AS_ECHO(["$[]0: be upgraded to zsh 4.3.4 or later."])
266 AS_ECHO("m4_text_wrap([Please tell ]_m4_defn([m4_PACKAGE_BUGREPORT])
267 m4_ifset([AC_PACKAGE_BUGREPORT], [m4_if(_m4_defn([m4_PACKAGE_BUGREPORT]),
268 _m4_defn([AC_PACKAGE_BUGREPORT]), [], [and _m4_defn([AC_PACKAGE_BUGREPORT])])])
269 [about your system, including any error possibly output before this message.
270 Then install a modern shell, or manually run the script under such a
271 shell if you do have one.], [$[]0: ], [], [62])")
278 _m4_popdef([AS_EXIT])])# _AS_DETECT_BETTER_SHELL
283 # This macro has a very special status. Normal use of M4sh relies
284 # heavily on AS_REQUIRE, so that needed initializations (such as
285 # _AS_TEST_PREPARE) are performed on need, not on demand. But
286 # Autoconf is the first client of M4sh, and for two reasons: configure
287 # and config.status. Relying on AS_REQUIRE is of course fine for
288 # configure, but fails for config.status (which is created by
289 # configure). So we need a means to force the inclusion of the
290 # various _AS_*_PREPARE on top of config.status. That's basically why
291 # there are so many _AS_*_PREPARE below, and that's also why it is
292 # important not to forget some: config.status needs them.
293 # List any preparations that create shell functions first, then
294 # topologically sort the others by their dependencies.
296 # Special case: we do not need _AS_LINENO_PREPARE, because the
297 # parent will have substituted $LINENO for us when processing its
298 # own invocation of _AS_LINENO_PREPARE.
299 m4_defun([_AS_PREPARE],
300 [m4_pushdef([AS_REQUIRE])]dnl
301 [m4_pushdef([AS_REQUIRE_SHELL_FN], _m4_defn([_AS_REQUIRE_SHELL_FN])
304 _AS_VAR_APPEND_PREPARE
305 _AS_VAR_ARITH_PREPARE
318 _m4_popdef([AS_REQUIRE], [AS_REQUIRE_SHELL_FN])])
322 # Output all the M4sh possible initialization into the initialization
323 # diversion. We do not use _AS_PREPARE so that the m4_provide symbols for
324 # AS_REQUIRE and AS_REQUIRE_SHELL_FN are defined properly, and so that
325 # shell functions are placed in M4SH-INIT-FN.
326 m4_defun([AS_PREPARE],
327 [m4_divert_push([KILL])
328 AS_REQUIRE([_AS_EXPR_PREPARE])
329 AS_REQUIRE([_AS_BASENAME_PREPARE])
330 AS_REQUIRE([_AS_DIRNAME_PREPARE])
331 AS_REQUIRE([_AS_ME_PREPARE])
332 AS_REQUIRE([_AS_CR_PREPARE])
333 AS_REQUIRE([_AS_LINENO_PREPARE])
334 AS_REQUIRE([_AS_ECHO_N_PREPARE])
335 AS_REQUIRE([_AS_LN_S_PREPARE])
336 AS_REQUIRE([_AS_MKDIR_P_PREPARE])
337 AS_REQUIRE([_AS_TEST_PREPARE])
338 AS_REQUIRE([_AS_TR_CPP_PREPARE])
339 AS_REQUIRE([_AS_TR_SH_PREPARE])
340 AS_REQUIRE([_AS_UNSET_PREPARE])
341 AS_REQUIRE([_AS_VAR_APPEND_PREPARE], [], [M4SH-INIT-FN])
342 AS_REQUIRE([_AS_VAR_ARITH_PREPARE], [], [M4SH-INIT-FN])
346 # AS_REQUIRE(NAME-TO-CHECK, [BODY-TO-EXPAND = NAME-TO-CHECK],
347 # [DIVERSION = M4SH-INIT])
348 # -----------------------------------------------------------
349 # BODY-TO-EXPAND is some initialization which must be expanded in the
350 # given diversion when expanded (required or not). The expansion
351 # goes in the named diversion or an earlier one.
353 # Note: we expand _m4_divert_desired before passing it to m4_divert_require,
354 # otherwise we would need to use m4_pushdef and m4_popdef instead of
357 # Since $2 can be quite large, this is factored for faster execution, giving
358 # either m4_require([$1], [$2]) or m4_divert_require(desired, [$1], [$2]).
359 m4_defun([AS_REQUIRE],
360 [m4_define([_m4_divert_desired], [m4_default_quoted([$3], [M4SH-INIT])])]dnl
361 [m4_if(m4_eval(_m4_divert(_m4_divert_dump) <= _m4_divert(_m4_divert_desired)),
363 [m4_divert_require(_m4_divert(_m4_divert_desired),]) [$1], [$2])])
365 # _AS_REQUIRE_SHELL_FN(NAME-TO-CHECK, COMMENT, BODY-TO-EXPAND)
366 # ------------------------------------------------------------
367 # Core of AS_REQUIRE_SHELL_FN, but without diversion support.
368 m4_define([_AS_REQUIRE_SHELL_FN], [
374 # AS_REQUIRE_SHELL_FN(NAME-TO-CHECK, COMMENT, BODY-TO-EXPAND,
375 # [DIVERSION = M4SH-INIT-FN])
376 # -----------------------------------------------------------
377 # BODY-TO-EXPAND is the body of a shell function to be emitted in the
378 # given diversion when expanded (required or not). Unlike other
379 # xx_REQUIRE macros, BODY-TO-EXPAND is mandatory. If COMMENT is
380 # provided (often via AS_FUNCTION_DESCRIBE), it is listed with a
381 # newline before the function name.
382 m4_define([AS_REQUIRE_SHELL_FN],
383 [m4_provide_if([AS_SHELL_FN_$1], [],
384 [AS_REQUIRE([AS_SHELL_FN_$1],
385 [m4_provide([AS_SHELL_FN_$1])_$0($@)],
386 m4_default_quoted([$4], [M4SH-INIT-FN]))])])
389 # _AS_RUN(TEST, [SHELL])
390 # ----------------------
391 # Run TEST under the current shell (if one parameter is used)
392 # or under the given SHELL, protecting it from syntax errors.
393 # Set as_run in order to assist _AS_LINENO_WORKS.
395 [m4_ifval([$2], [{ $as_echo "$as_bourne_compatible"$1 | as_run=a $2; }],
396 [(eval $1)]) 2>/dev/null])
401 # This is a spy to detect "in the wild" shells that do not support shell
402 # functions correctly. It is based on the m4sh.at Autotest testcases.
403 m4_define([_AS_SHELL_FN_WORK],
404 [as_func_return () { (exit [$]1); }
405 as_func_success () { as_func_return 0; }
406 as_func_failure () { as_func_return 1; }
407 as_func_ret_success () { return 0; }
408 as_func_ret_failure () { return 1; }
411 as_func_success || { exitcode=1; echo as_func_success failed.; }
412 as_func_failure && { exitcode=1; echo as_func_failure succeeded.; }
413 as_func_ret_success || { exitcode=1; echo as_func_ret_success failed.; }
414 as_func_ret_failure && { exitcode=1; echo as_func_ret_failure succeeded.; }
415 AS_IF([( set x; as_func_ret_success y && test x = "[$]1" )], [],
416 [exitcode=1; echo positional parameters were not saved.])
417 test x$exitcode = x0[]])# _AS_SHELL_FN_WORK
422 # This is the prolog that is emitted by AS_INIT and AS_INIT_GENERATED.
423 m4_defun([_AS_SHELL_SANITIZE],
424 [m4_text_box([M4sh Initialization.])
428 _AS_PATH_SEPARATOR_PREPARE
431 # We need space, tab and new line, in precisely that order. Quoting is
432 # there to prevent editors from complaining about space-tab.
433 # (If _AS_PATH_WALK were called with IFS unset, it would disable word
434 # splitting by setting IFS to empty value.)
437 # Find who we are. Look in the path if we contain no directory separator.
439 *[[\\/]]* ) as_myself=$[0] ;;
441 [test -r "$as_dir/$[0]" && as_myself=$as_dir/$[0] && break])
444 # We did not find ourselves, most probably we were run as `sh COMMAND'
445 # in which case we are not to be found in the path.
446 if test "x$as_myself" = x; then
449 if test ! -f "$as_myself"; then
450 AS_ECHO(["$as_myself: error: cannot find myself; rerun with an absolute file name"]) >&2
454 # Unset variables that we do not need and which cause bugs (e.g. in
455 # pre-3.0 UWIN ksh). But do not cause bugs in bash 2.01; the "|| exit 1"
456 # suppresses any "Segmentation fault" message there. '((' could
457 # trigger a bug in pdksh 5.2.14.
458 for as_var in BASH_ENV ENV MAIL MAILPATH
459 do eval test x\${$as_var+set} = xset \
460 && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
473 (unset CDPATH) >/dev/null 2>&1 && unset CDPATH
474 ])# _AS_SHELL_SANITIZE
479 # This is only needed for the sake of Libtool, which screws up royally
480 # in its usage of M4sh internals.
481 m4_define([AS_SHELL_SANITIZE],
483 m4_provide_if([AS_INIT], [],
484 [m4_provide([AS_INIT])
485 _AS_DETECT_REQUIRED([_AS_SHELL_FN_WORK])
486 _AS_DETECT_BETTER_SHELL
491 ## ----------------------------- ##
492 ## 2. Wrappers around builtins. ##
493 ## ----------------------------- ##
495 # This section is lexicographically sorted.
498 # AS_CASE(WORD, [PATTERN1], [IF-MATCHED1]...[DEFAULT])
499 # ----------------------------------------------------
502 # | PATTERN1) IF-MATCHED1 ;; #(
506 # The shell comments are intentional, to work around people who don't
507 # realize the impacts of using insufficient m4 quoting. This macro
508 # always provides a default case, to work around a Solaris /bin/sh
509 # bug regarding the exit status when no case matches.
510 m4_define([_AS_CASE],
512 $1[)] m4_default([$2], [:]) ;;])
513 m4_define([_AS_CASE_DEFAULT],
515 *[)] m4_default([$1], [:]) ;;])
518 [case $1 in[]m4_map_args_pair([_$0], [_$0_DEFAULT],
519 m4_shift($@m4_if(m4_eval([$# & 1]), [1], [,])))
523 # AS_EXIT([EXIT-CODE = 1])
524 # ------------------------
525 # Exit and set exit code to EXIT-CODE in the way that it's seen
528 # We cannot simply use "exit N" because some shells (zsh and Solaris sh)
529 # will not set $? to N while running the code set by "trap 0"
530 # So we set $? by executing "exit N" in the subshell and then exit.
531 # Other shells don't use `$?' as default for `exit', hence just repeating
532 # the exit value can only help improving portability.
534 [{ (exit m4_default([$1], 1)); exit m4_default([$1], 1); }])
537 # AS_IF(TEST1, [IF-TRUE1 = :]...[IF-FALSE = :])
538 # ---------------------------------------------
548 # with simplifications if IF-TRUE1 and/or IF-FALSE is empty.
552 m4_default([$2], [:])
554 m4_define([_AS_IF_ELSE],
561 m4_default([$2], [:])
562 m4_map_args_pair([_$0], [_$0_ELSE], m4_shift2($@))]dnl
568 # Define $as_unset to execute AS_UNSET, for backwards compatibility
569 # with older versions of M4sh.
570 m4_defun([_AS_UNSET_PREPARE],
571 [AS_FUNCTION_DESCRIBE([as_func_unset], [VAR], [Portably unset VAR.])
576 as_unset=as_func_unset])
581 # Unset the env VAR, working around shells that do not allow unsetting
582 # a variable that is not already set. You should not unset MAIL and
583 # MAILCHECK, as that triggers a bug in Bash 2.01.
585 [{ AS_LITERAL_IF([$1], [], [eval ])$1=; unset $1;}])
592 ## ------------------------------------------ ##
593 ## 3. Error and warnings at the shell level. ##
594 ## ------------------------------------------ ##
596 # If AS_MESSAGE_LOG_FD is defined, shell messages are duplicated there
600 # AS_ESCAPE(STRING, [CHARS = $"`\])
601 # ---------------------------------
602 # Escape the CHARS in STRING.
604 # Avoid the m4_bpatsubst if there are no interesting characters to escape.
605 # _AS_ESCAPE bypasses argument defaulting.
606 m4_define([AS_ESCAPE],
607 [_$0([$1], m4_default([$2], [\"$`]))])
608 m4_define([_AS_ESCAPE],
610 m4_len(m4_translit([[$1]], [$2])),
611 [$1], [m4_bpatsubst([$1], [[$2]], [\\\&])])])
614 # _AS_QUOTE_IFELSE(STRING, IF-MODERN-QUOTATION, IF-OLD-QUOTATION)
615 # ---------------------------------------------------------------
616 # Compatibility glue between the old AS_MSG suite which did not
617 # quote anything, and the modern suite which quotes the quotes.
618 # If STRING contains `\\' or `\$', it's modern.
619 # If STRING contains `\"' or `\`', it's old.
620 # Otherwise it's modern.
622 # Profiling shows that m4_index is 5 to 8x faster than m4_bregexp. The
623 # slower implementation used:
628 # The current implementation caters to the common case of no backslashes,
629 # to minimize m4_index expansions (hence the nested if).
630 m4_define([_AS_QUOTE_IFELSE],
631 [m4_cond([m4_index([$1], [\])], [-1], [$2],
632 [m4_eval(m4_index([$1], [\\]) >= 0)], [1], [$2],
633 [m4_eval(m4_index([$1], [\$]) >= 0)], [1], [$2],
634 [m4_eval(m4_index([$1], [\`]) >= 0)], [1], [$3],
635 [m4_eval(m4_index([$1], [\"]) >= 0)], [1], [$3],
639 # _AS_QUOTE(STRING, [CHARS = `"])
640 # -------------------------------
641 # If there are quoted (via backslash) backquotes do nothing, else
642 # backslash all the quotes.
643 m4_define([_AS_QUOTE],
644 [_AS_QUOTE_IFELSE([$1],
645 [_AS_ESCAPE([$1], m4_default([$2], [`""]))],
647 [back quotes and double quotes must not be escaped in: $1])dnl
651 # _AS_ECHO_UNQUOTED(STRING, [FD = AS_MESSAGE_FD])
652 # -----------------------------------------------
653 # Perform shell expansions on STRING and echo the string to FD.
654 m4_define([_AS_ECHO_UNQUOTED],
655 [AS_ECHO(["$1"]) >&m4_default([$2], [AS_MESSAGE_FD])])
658 # _AS_ECHO(STRING, [FD = AS_MESSAGE_FD])
659 # --------------------------------------
660 # Protect STRING from backquote expansion, echo the result to FD.
661 m4_define([_AS_ECHO],
662 [_AS_ECHO_UNQUOTED([_AS_QUOTE([$1])], [$2])])
665 # _AS_ECHO_LOG(STRING)
666 # --------------------
667 # Log the string to AS_MESSAGE_LOG_FD.
668 m4_defun_init([_AS_ECHO_LOG],
669 [AS_REQUIRE([_AS_LINENO_PREPARE])],
670 [_AS_ECHO([$as_me:${as_lineno-$LINENO}: $1], [AS_MESSAGE_LOG_FD])])
675 # Check whether to use -n, \c, or newline-tab to separate
676 # checking messages from result messages.
677 # Don't try to cache, since the results of this macro are needed to
678 # display the checking message. In addition, caching something used once
679 # has little interest.
680 # Idea borrowed from dist 3.0. Use `*c*,', not `*c,' because if `\c'
681 # failed there is also a newline to match.
682 m4_defun([_AS_ECHO_N_PREPARE],
683 [ECHO_C= ECHO_N= ECHO_T=
684 case `echo -n x` in @%:@((((
687 *c*) ECHO_T=' ';; # ECHO_T is single tab character.
693 ])# _AS_ECHO_N_PREPARE
696 # _AS_ECHO_N(STRING, [FD = AS_MESSAGE_FD])
697 # ----------------------------------------
698 # Same as _AS_ECHO, but echo doesn't return to a new line.
699 m4_define([_AS_ECHO_N],
700 [AS_ECHO_N(["_AS_QUOTE([$1])"]) >&m4_default([$2], [AS_MESSAGE_FD])])
703 # AS_MESSAGE(STRING, [FD = AS_MESSAGE_FD])
704 # ----------------------------------------
705 # Output "`basename $0`: "STRING to the open file FD.
706 m4_defun_init([AS_MESSAGE],
707 [AS_REQUIRE([_AS_ME_PREPARE])],
708 [m4_ifset([AS_MESSAGE_LOG_FD],
709 [{ _AS_ECHO_LOG([$1])
710 _AS_ECHO([$as_me: $1], [$2]);}],
711 [_AS_ECHO([$as_me: $1], [$2])])[]])
717 [AS_MESSAGE([WARNING: $1], [2])])# AS_WARN
720 # AS_ERROR(ERROR, [EXIT-STATUS = 1])
721 # ----------------------------------
722 m4_define([AS_ERROR],
723 [{ AS_MESSAGE([error: $1], [2])
724 AS_EXIT([$2]); }])# AS_ERROR
728 # AS_LINENO_PUSH([LINENO])
729 # ------------------------
730 # If this is the outermost call to AS_LINENO_PUSH, make sure that
731 # AS_MESSAGE will print LINENO as the line number.
732 m4_defun([AS_LINENO_PUSH],
733 [as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack])
736 # AS_LINENO_POP([LINENO])
737 # ------------------------
738 # If this is call balances the outermost call to AS_LINENO_PUSH,
739 # AS_MESSAGE will restart printing $LINENO as the line number.
740 m4_defun([AS_LINENO_POP],
741 [eval $as_lineno_stack; test "x$as_lineno_stack" = x && AS_UNSET([as_lineno])])
745 ## -------------------------------------- ##
746 ## 4. Portable versions of common tools. ##
747 ## -------------------------------------- ##
749 # This section is lexicographically sorted.
752 # AS_BASENAME(FILE-NAME)
753 # ----------------------
754 # Simulate the command 'basename FILE-NAME'. Not all systems have basename.
755 # Also see the comments for AS_DIRNAME.
757 m4_defun([_AS_BASENAME_EXPR],
758 [$as_expr X/[]$1 : '.*/\([[^/][^/]*]\)/*$' \| \
759 X[]$1 : 'X\(//\)$' \| \
760 X[]$1 : 'X\(/\)' \| .])
762 m4_defun([_AS_BASENAME_SED],
764 sed ['/^.*\/\([^/][^/]*\)\/*$/{
778 m4_defun_init([AS_BASENAME],
779 [AS_REQUIRE([_$0_PREPARE])],
780 [$as_basename -- $1 ||
781 _AS_BASENAME_EXPR([$1]) 2>/dev/null ||
782 _AS_BASENAME_SED([$1])])
785 # _AS_BASENAME_PREPARE
786 # --------------------
787 # Avoid Solaris 9 /usr/ucb/basename, as `basename /' outputs an empty line.
788 # Also, traditional basename mishandles --. Require here _AS_EXPR_PREPARE,
789 # to avoid problems when _AS_BASENAME is called from the M4SH-INIT diversion.
790 m4_defun([_AS_BASENAME_PREPARE],
791 [AS_REQUIRE([_AS_EXPR_PREPARE])]dnl
792 [if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
797 ])# _AS_BASENAME_PREPARE
800 # AS_DIRNAME(FILE-NAME)
801 # ---------------------
802 # Simulate the command 'dirname FILE-NAME'. Not all systems have dirname.
803 # This macro must be usable from inside ` `.
805 # Prefer expr to echo|sed, since expr is usually faster and it handles
806 # backslashes and newlines correctly. However, older expr
807 # implementations (e.g. SunOS 4 expr and Solaris 8 /usr/ucb/expr) have
808 # a silly length limit that causes expr to fail if the matched
809 # substring is longer than 120 bytes. So fall back on echo|sed if
811 m4_defun_init([_AS_DIRNAME_EXPR],
812 [AS_REQUIRE([_AS_EXPR_PREPARE])],
813 [$as_expr X[]$1 : 'X\(.*[[^/]]\)//*[[^/][^/]]*/*$' \| \
814 X[]$1 : 'X\(//\)[[^/]]' \| \
815 X[]$1 : 'X\(//\)$' \| \
816 X[]$1 : 'X\(/\)' \| .])
818 m4_defun([_AS_DIRNAME_SED],
820 sed ['/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
838 m4_defun_init([AS_DIRNAME],
839 [AS_REQUIRE([_$0_PREPARE])],
840 [$as_dirname -- $1 ||
841 _AS_DIRNAME_EXPR([$1]) 2>/dev/null ||
842 _AS_DIRNAME_SED([$1])])
845 # _AS_DIRNAME_PREPARE
846 # --------------------
847 m4_defun([_AS_DIRNAME_PREPARE],
848 [AS_REQUIRE([_AS_EXPR_PREPARE])]dnl
849 [if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
854 ])# _AS_DIRNAME_PREPARE
859 # Output WORD followed by a newline. WORD must be a single shell word
860 # (typically a quoted string). The bytes of WORD are output as-is, even
861 # if it starts with "-" or contains "\".
862 m4_defun_init([AS_ECHO],
863 [AS_REQUIRE([_$0_PREPARE])],
869 # Like AS_ECHO(WORD), except do not output the trailing newline.
870 m4_defun_init([AS_ECHO_N],
871 [AS_REQUIRE([_AS_ECHO_PREPARE])],
877 # Arrange for $as_echo 'FOO' to echo FOO without escape-interpretation;
878 # and similarly for $as_echo_foo, which omits the trailing newline.
879 # 'FOO' is an optional single argument; a missing FOO is treated as empty.
880 m4_defun([_AS_ECHO_PREPARE],
884 # Printing a long string crashes Solaris 7 /usr/bin/printf.
885 as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
886 as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
887 as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
888 if (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
889 as_echo='printf %s\n'
890 as_echo_n='printf %s'
892 if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then
893 as_echo_body='eval /usr/ucb/echo -n "$][1$as_nl"'
894 as_echo_n='/usr/ucb/echo -n'
896 as_echo_body='eval expr "X$][1" : "X\\(.*\\)"'
901 expr "X$arg" : "X\\(.*\\)$as_nl";
902 arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
904 expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl"
906 export as_echo_n_body
907 as_echo_n='sh -c $as_echo_n_body as_echo'
910 as_echo='sh -c $as_echo_body as_echo'
912 ]])# _AS_ECHO_PREPARE
917 # Check whether a file has executable or search permissions.
918 m4_defun_init([AS_TEST_X],
919 [AS_REQUIRE([_AS_TEST_PREPARE])],
920 [$as_test_x $1[]])# AS_TEST_X
925 # Check whether a file is a regular file that has executable permissions.
926 m4_defun_init([AS_EXECUTABLE_P],
927 [AS_REQUIRE([_AS_TEST_PREPARE])],
928 [{ test -f $1 && AS_TEST_X([$1]); }])# AS_EXECUTABLE_P
933 # QNX 4.25 expr computes and issue the right result but exits with failure.
934 # Tru64 expr mishandles leading zeros in numeric strings.
935 # Detect these flaws.
936 m4_defun([_AS_EXPR_PREPARE],
937 [if expr a : '\(a\)' >/dev/null 2>&1 &&
938 test "X`expr 00001 : '.*\(...\)'`" = X001; then
948 # Define $as_me to the basename of the executable file's name.
949 m4_defun([AS_ME_PREPARE], [AS_REQUIRE([_$0])])
950 m4_defun([_AS_ME_PREPARE],
951 [AS_REQUIRE([_AS_BASENAME_PREPARE])]dnl
952 [as_me=`AS_BASENAME("$[0]")`
957 # Succeed if the currently executing shell supports LINENO.
958 # This macro does not expand to a single shell command, so be careful
959 # when using it. Surrounding the body of this macro with {} would
960 # cause "bash -c '_ASLINENO_WORKS'" to fail (with Bash 2.05, anyway),
961 # but that bug is irrelevant to our use of LINENO. We can't use
962 # AS_VAR_ARITH, as this is expanded prior to shell functions.
964 # Testing for LINENO support is hard; we use _AS_LINENO_WORKS inside
965 # _AS_RUN, which sometimes eval's its argument (pdksh gives false
966 # negatives if $LINENO is expanded by eval), and sometimes passes the
967 # argument to another shell (if the current shell supports LINENO,
968 # then expanding $LINENO prior to the string leads to false
969 # positives). Hence, we perform two tests, and coordinate with
970 # _AS_DETECT_EXPAND (which ensures that only the first of two LINENO
971 # is expanded in advance) and _AS_RUN (which sets $as_run to 'a' when
972 # handing the test to another shell), so that we know which test to
974 m4_define([_AS_LINENO_WORKS],
975 [ as_lineno_1=$LINENO as_lineno_1a=$LINENO
976 as_lineno_2=$LINENO as_lineno_2a=$LINENO
977 eval 'test "x$as_lineno_1'$as_run'" != "x$as_lineno_2'$as_run'" &&
978 test "x`expr $as_lineno_1'$as_run' + 1`" = "x$as_lineno_2'$as_run'"'])
983 # If LINENO is not supported by the shell, produce a version of this
984 # script where LINENO is hard coded.
985 # Comparing LINENO against _oline_ is not a good solution, since in
986 # the case of embedded executables (such as config.status within
987 # configure) you'd compare LINENO wrt config.status vs. _oline_ wrt
989 m4_defun([AS_LINENO_PREPARE], [AS_REQUIRE([_$0])])
990 m4_defun([_AS_LINENO_PREPARE],
991 [AS_REQUIRE([_AS_CR_PREPARE])]dnl
992 [AS_REQUIRE([_AS_ME_PREPARE])]dnl
993 [_AS_DETECT_SUGGESTED([_AS_LINENO_WORKS])]dnl
994 dnl Even if the logging fd is open, we don't want to use $LINENO in the
995 dnl AS_ERROR complaining that LINENO is broken.
996 [m4_pushdef([AS_MESSAGE_LOG_FD])]dnl
997 dnl Create $as_me.lineno as a copy of $as_myself, but with $LINENO
998 dnl uniformly replaced by the line number. The first 'sed' inserts a
999 dnl line-number line after each line using $LINENO; the second 'sed'
1000 dnl does the real work. The second script uses 'N' to pair each
1001 dnl line-number line with the line containing $LINENO, and appends
1002 dnl trailing '-' during substitution so that $LINENO is not a special
1003 dnl case at line end. (Raja R Harinath suggested sed '=', and Paul
1004 dnl Eggert wrote the scripts with optimization help from Paolo Bonzini).
1005 [_AS_LINENO_WORKS || {
1006 # Blame Lee E. McMahon (1931-1989) for sed's syntax. :-)
1018 s/[[$]]LINENO\([[^'$as_cr_alnum'_]].*\n\)\(.*\)/\2\1\2/
1022 chmod +x "$as_me.lineno" ||
1023 AS_ERROR([cannot create $as_me.lineno; rerun with a POSIX shell])
1025 # Don't try to exec as it changes $[0], causing all sort of problems
1026 # (the dirname of $[0] is not the place where we might find the
1027 # original and so on. Autoconf is especially sensitive to this).
1029 # Exit status is that of the last command.
1032 _m4_popdef([AS_MESSAGE_LOG_FD])])# _AS_LINENO_PREPARE
1037 # Don't use conftest.sym to avoid file name issues on DJGPP, where this
1038 # would yield conftest.sym.exe for DJGPP < 2.04. And don't use `conftest'
1039 # as base name to avoid prohibiting concurrency (e.g., concurrent
1040 # config.statuses). On read-only media, assume 'cp -p' and hope we
1041 # are just running --help anyway.
1042 m4_defun([_AS_LN_S_PREPARE],
1043 [rm -f conf$$ conf$$.exe conf$$.file
1044 if test -d conf$$.dir; then
1045 rm -f conf$$.dir/conf$$.file
1048 mkdir conf$$.dir 2>/dev/null
1050 if (echo >conf$$.file) 2>/dev/null; then
1051 if ln -s conf$$.file conf$$ 2>/dev/null; then
1053 # ... but there are two gotchas:
1054 # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
1055 # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
1056 # In both cases, we have to default to `cp -p'.
1057 ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
1059 elif ln conf$$.file conf$$ 2>/dev/null; then
1067 rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
1068 rmdir conf$$.dir 2>/dev/null
1069 ])# _AS_LN_S_PREPARE
1072 # AS_LN_S(FILE, LINK)
1073 # -------------------
1074 # FIXME: Should we add the glue code to handle properly relative symlinks
1075 # simulated with `ln' or `cp'?
1076 m4_defun_init([AS_LN_S],
1077 [AS_REQUIRE([_AS_LN_S_PREPARE])],
1083 # Emit code that can be used to emulate `mkdir -p` with plain `mkdir';
1084 # the code assumes that "$as_dir" contains the directory to create.
1085 # $as_dir is normalized, so there is no need to worry about using --.
1086 m4_define([_AS_MKDIR_P],
1088 -*) as_dir=./$as_dir;;
1090 test -d "$as_dir" || eval $as_mkdir_p || {
1094 *\'*) as_qdir=`AS_ECHO(["$as_dir"]) | sed "s/'/'\\\\\\\\''/g"`;; #'(
1095 *) as_qdir=$as_dir;;
1097 as_dirs="'$as_qdir' $as_dirs"
1098 as_dir=`AS_DIRNAME("$as_dir")`
1099 test -d "$as_dir" && break
1101 test -z "$as_dirs" || eval "mkdir $as_dirs"
1102 } || test -d "$as_dir" || AS_ERROR([cannot create directory $as_dir])
1107 # Emulate `mkdir -p' with plain `mkdir' if needed.
1108 m4_defun_init([AS_MKDIR_P],
1109 [AS_REQUIRE([_$0_PREPARE])],
1110 [as_dir=$1; as_func_mkdir_p])# AS_MKDIR_P
1113 # _AS_MKDIR_P_PREPARE
1114 # -------------------
1115 m4_defun([_AS_MKDIR_P_PREPARE],
1116 [AS_REQUIRE_SHELL_FN([as_func_mkdir_p],
1117 [AS_FUNCTION_DESCRIBE([as_func_mkdir_p], [],
1118 [Create "$as_dir" as a directory, including parents if necessary.])],
1122 [if mkdir -p . 2>/dev/null; then
1123 as_mkdir_p='mkdir -p "$as_dir"'
1125 test -d ./-p && rmdir ./-p
1128 ])# _AS_MKDIR_P_PREPARE
1131 # _AS_PATH_SEPARATOR_PREPARE
1132 # --------------------------
1133 # Compute the path separator.
1134 m4_defun([_AS_PATH_SEPARATOR_PREPARE],
1135 [# The user is always right.
1136 if test "${PATH_SEPARATOR+set}" != set; then
1138 (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
1139 (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
1143 ])# _AS_PATH_SEPARATOR_PREPARE
1146 # _AS_PATH_WALK([PATH = $PATH], BODY, [IF-NOT-FOUND])
1147 # ---------------------------------------------------
1148 # Walk through PATH running BODY for each `as_dir'. If BODY never does a
1149 # `break', evaluate IF-NOT-FOUND.
1151 # Still very private as its interface looks quite bad.
1153 # `$as_dummy' forces splitting on constant user-supplied paths.
1154 # POSIX.2 field splitting is done only on the result of word
1155 # expansions, not on literal text. This closes a longstanding sh security
1156 # hole. Optimize it away when not needed, i.e., if there are no literal
1158 m4_defun_init([_AS_PATH_WALK],
1159 [AS_REQUIRE([_AS_PATH_SEPARATOR_PREPARE])],
1160 [as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
1161 m4_ifvaln([$3], [as_found=false])dnl
1162 m4_bmatch([$1], [[:;]],
1164 for as_dir in $as_dummy],
1165 [for as_dir in m4_default([$1], [$PATH])])
1168 test -z "$as_dir" && as_dir=.
1169 m4_ifvaln([$3], [as_found=:])dnl
1171 m4_ifvaln([$3], [as_found=false])dnl
1173 m4_ifvaln([$3], [$as_found || { $3; }])dnl
1178 # AS_SET_CATFILE(VAR, DIR-NAME, FILE-NAME)
1179 # ----------------------------------------
1180 # Set VAR to DIR-NAME/FILE-NAME.
1181 # Optimize the common case where $2 or $3 is '.'.
1182 m4_define([AS_SET_CATFILE],
1188 [[\\/]]* | ?:[[\\/]]* ) $1=$3;;
1191 esac[]])# AS_SET_CATFILE
1196 # Find out whether `test -x' works. If not, prepare a substitute
1197 # that should work well enough for most scripts.
1199 # Here are some of the problems with the substitute.
1200 # The 'ls' tests whether the owner, not the current user, can execute/search.
1201 # The eval means '*', '?', and '[' cause inadvertent file name globbing
1202 # after the 'eval', so jam together as many tokens as we can to minimize
1203 # the likelihood that the inadvertent globbing will actually do anything.
1204 # Luckily, this gorp is needed only on really ancient hosts.
1206 m4_defun([_AS_TEST_PREPARE],
1207 [if test -x / >/dev/null 2>&1; then
1210 if ls -dL / >/dev/null 2>&1; then
1217 if test -d "$[]1"; then
1223 case `ls -ld'$as_ls_L_option' "$[]1" 2>/dev/null` in @%:@((
1224 ???[[sx]]*):;;*)false;;esac;fi
1228 dnl as_executable_p is present for backward compatibility with Libtool
1229 dnl 1.5.22, but it should go away at some point.
1230 as_executable_p=$as_test_x
1231 ])# _AS_TEST_PREPARE
1236 ## ------------------ ##
1237 ## 5. Common idioms. ##
1238 ## ------------------ ##
1240 # This section is lexicographically sorted.
1243 # AS_BOX(MESSAGE, [FRAME-CHARACTER = `-'])
1244 # ----------------------------------------
1245 # Output MESSAGE, a single line text, framed with FRAME-CHARACTER (which
1248 [AS_LITERAL_IF([$1],
1249 [_AS_BOX_LITERAL($@)],
1250 [_AS_BOX_INDIR($@)])])
1253 # _AS_BOX_LITERAL(MESSAGE, [FRAME-CHARACTER = `-'])
1254 # -------------------------------------------------
1255 m4_define([_AS_BOX_LITERAL],
1261 # _AS_BOX_INDIR(MESSAGE, [FRAME-CHARACTER = `-'])
1262 # -----------------------------------------------
1263 m4_define([_AS_BOX_INDIR],
1264 [sed 'h;s/./m4_default([$2], [-])/g;s/^.../@%:@@%:@ /;s/...$/ @%:@@%:@/;p;x;p;x' <<_ASBOX
1265 @%:@@%:@ $1 @%:@@%:@
1269 # AS_FUNCTION_DESCRIBE(NAME, [ARGS], DESCRIPTION, [WRAP-COLUMN = 79])
1270 # -------------------------------------------------------------------
1271 # Output a shell comment describing NAME and its arguments ARGS, then
1272 # a separator line, then the DESCRIPTION wrapped at a decimal
1273 # WRAP-COLUMN. The output resembles:
1276 # # Wrapped DESCRIPTION text
1277 # NAME and ARGS are expanded, while DESCRIPTION is treated as a
1278 # whitespace-separated list of strings that are not expanded.
1279 m4_define([AS_FUNCTION_DESCRIBE],
1280 [@%:@ $1[]m4_ifval([$2], [ $2])
1281 @%:@ m4_translit(m4_format([%*s],
1282 m4_qlen(m4_expand([$1[]m4_ifval([$2], [ $2])])), []),
1284 m4_text_wrap([$3], [@%:@ ], [], [$4])])
1287 # AS_HELP_STRING(LHS, RHS, [INDENT-COLUMN = 26], [WRAP-COLUMN = 79])
1288 # ------------------------------------------------------------------
1290 # Format a help string so that it looks pretty when the user executes
1291 # "script --help". This macro takes up to four arguments, a
1292 # "left hand side" (LHS), a "right hand side" (RHS), a decimal
1293 # INDENT-COLUMN which is the column where wrapped lines should begin
1294 # (the default of 26 is recommended), and a decimal WRAP-COLUMN which is
1295 # the column where lines should wrap (the default of 79 is recommended).
1296 # LHS is expanded, RHS is not.
1298 # For backwards compatibility not documented in the manual, INDENT-COLUMN
1299 # can also be specified as a string of white spaces, whose width
1300 # determines the indentation column. Using TABs in INDENT-COLUMN is not
1301 # recommended, since screen width of TAB is not computed.
1303 # The resulting string is suitable for use in other macros that require
1304 # a help string (e.g. AC_ARG_WITH).
1306 # Here is the sample string from the Autoconf manual (Node: External
1307 # Software) which shows the proper spacing for help strings.
1309 # --with-readline support fancy command line editing
1312 # | column 2 column 26
1316 # A help string is made up of a "left hand side" (LHS) and a "right
1317 # hand side" (RHS). In the example above, the LHS is
1318 # "--with-readline", while the RHS is "support fancy command line
1321 # If the LHS contains more than (INDENT-COLUMN - 3) characters, then the
1322 # LHS is terminated with a newline so that the RHS starts on a line of its
1323 # own beginning at INDENT-COLUMN. In the default case, this corresponds to an
1324 # LHS with more than 23 characters.
1326 # Therefore, in the example, if the LHS were instead
1327 # "--with-readline-blah-blah-blah", then the AS_HELP_STRING macro would
1331 # --with-readline-blah-blah-blah
1332 # ^ ^ support fancy command line editing
1335 # column 0 column 26
1338 # m4_text_wrap hacks^Wworks around the fact that m4_format does not
1339 # know quadrigraphs.
1341 m4_define([AS_HELP_STRING],
1342 [m4_text_wrap([$2], m4_cond([[$3]], [], [ ],
1343 [m4_eval([$3]+0)], [0], [[$3]],
1344 [m4_format([[%*s]], [$3], [])]),
1345 m4_expand([ $1 ]), [$4])])# AS_HELP_STRING
1348 # AS_IDENTIFIER_IF(EXPRESSION, IF-IDENT, IF-NOT-IDENT)
1349 # ----------------------------------------------------
1350 # If EXPRESSION serves as an identifier (ie, after removal of @&t@, it
1351 # matches the regex `^[a-zA-Z_][a-zA-Z_0-9]*$'), execute IF-IDENT,
1352 # otherwise IF-NOT-IDENT.
1354 # This is generally faster than the alternative:
1355 # m4_bmatch(m4_bpatsubst([[$1]], [@&t@]), ^m4_defn([m4_re_word])$,
1358 # Rather than expand m4_defn every time AS_IDENTIFIER_IF is expanded, we
1359 # inline its expansion up front. Only use a regular expression if we
1360 # detect a potential quadrigraph.
1362 # First, check if the entire string matches m4_cr_symbol2. Only then do
1363 # we worry if the first character also matches m4_cr_symbol1 (ie. does not
1364 # match m4_cr_digit).
1365 m4_define([AS_IDENTIFIER_IF],
1366 [m4_if(m4_index([$1], [@]), [-1],
1368 [_$0(m4_bpatsubst([[$1]], [@&t@]), [$2], [$3])])])
1369 m4_define([_AS_IDENTIFIER_IF],
1370 [m4_cond([[$1]], [], [$3],
1371 [m4_eval(m4_len(m4_translit([[$1]], ]]dnl
1372 m4_dquote(m4_dquote(m4_defn([m4_cr_symbols2])))[[)) > 0)], [1], [$3],
1373 [m4_len(m4_translit(m4_format([[%.1s]], [$1]), ]]dnl
1374 m4_dquote(m4_dquote(m4_defn([m4_cr_symbols1])))[[))], [0], [$2], [$3])])
1377 # AS_LITERAL_IF(EXPRESSION, IF-LITERAL, IF-NOT-LITERAL)
1378 # -----------------------------------------------------
1379 # If EXPRESSION has shell indirections ($var or `expr`), expand
1380 # IF-INDIR, else IF-NOT-INDIR.
1381 # This is an *approximation*: for instance EXPRESSION = `\$' is
1382 # definitely a literal, but will not be recognized as such.
1384 # Why do we reject EXPRESSION expanding with `[' or `]' as a literal?
1385 # Because AS_TR_SH is MUCH faster if it can use m4_translit on literals
1386 # instead of m4_bpatsubst; but m4_translit is much tougher to do safely
1387 # if `[' is translated.
1389 # Note that the quadrigraph @S|@ can result in non-literals, but outright
1390 # rejecting all @ would make AC_INIT complain on its bug report address.
1392 # We used to use m4_bmatch(m4_quote($1), [[`$]], [$3], [$2]), but
1393 # profiling shows that it is faster to use m4_translit.
1395 # Because the translit is stripping quotes, it must also neutralize anything
1396 # that might be in a macro name, as well as comments and commas. All the
1397 # problem characters are unified so that a single m4_index can scan the
1400 # Rather than expand m4_defn every time AS_LITERAL_IF is expanded, we
1401 # inline its expansion up front.
1402 m4_define([AS_LITERAL_IF],
1403 [m4_cond([m4_eval(m4_index(m4_quote($1), [@S|@]) == -1)], [0], [$3],
1404 [m4_index(m4_translit(m4_quote($1),
1406 m4_dquote(m4_dquote(m4_defn([m4_cr_symbols2])))[[,
1412 # AS_TMPDIR(PREFIX, [DIRECTORY = $TMPDIR [= /tmp]])
1413 # -------------------------------------------------
1414 # Create as safely as possible a temporary directory in DIRECTORY
1415 # which name is inspired by PREFIX (should be 2-4 chars max).
1416 m4_define([AS_TMPDIR],
1417 [# Create a (secure) tmp directory for tmp files.
1418 m4_if([$2], [], [: ${TMPDIR=/tmp}])
1420 tmp=`(umask 077 && mktemp -d "m4_default([$2], [$TMPDIR])/$1XXXXXX") 2>/dev/null` &&
1421 test -n "$tmp" && test -d "$tmp"
1424 tmp=m4_default([$2], [$TMPDIR])/$1$$-$RANDOM
1425 (umask 077 && mkdir "$tmp")
1426 } || AS_ERROR([cannot create a temporary directory in m4_default([$2],
1427 [$TMPDIR])])])# AS_TMPDIR
1432 # Try to describe this machine. Meant for logs.
1433 m4_define([AS_UNAME],
1436 m4_text_box([Platform.])
1438 hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
1439 uname -m = `(uname -m) 2>/dev/null || echo unknown`
1440 uname -r = `(uname -r) 2>/dev/null || echo unknown`
1441 uname -s = `(uname -s) 2>/dev/null || echo unknown`
1442 uname -v = `(uname -v) 2>/dev/null || echo unknown`
1444 /usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
1445 /bin/uname -X = `(/bin/uname -X) 2>/dev/null || echo unknown`
1447 /bin/arch = `(/bin/arch) 2>/dev/null || echo unknown`
1448 /usr/bin/arch -k = `(/usr/bin/arch -k) 2>/dev/null || echo unknown`
1449 /usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
1450 /usr/bin/hostinfo = `(/usr/bin/hostinfo) 2>/dev/null || echo unknown`
1451 /bin/machine = `(/bin/machine) 2>/dev/null || echo unknown`
1452 /usr/bin/oslevel = `(/usr/bin/oslevel) 2>/dev/null || echo unknown`
1453 /bin/universe = `(/bin/universe) 2>/dev/null || echo unknown`
1457 _AS_PATH_WALK([$PATH], [AS_ECHO(["PATH: $as_dir"])])
1461 # _AS_VERSION_COMPARE_PREPARE
1462 # ---------------------------
1463 # Output variables for comparing version numbers.
1464 m4_defun([_AS_VERSION_COMPARE_PREPARE],
1465 [[as_awk_strverscmp='
1466 # Use only awk features that work with 7th edition Unix awk (1978).
1467 # My, what an old awk you have, Mr. Solaris!
1469 while (length(v1) && length(v2)) {
1470 # Set d1 to be the next thing to compare from v1, and likewise for d2.
1471 # Normally this is a single character, but if v1 and v2 contain digits,
1472 # compare them as integers and fractions as strverscmp does.
1473 if (v1 ~ /^[0-9]/ && v2 ~ /^[0-9]/) {
1474 # Split v1 and v2 into their leading digit string components d1 and d2,
1475 # and advance v1 and v2 past the leading digit strings.
1476 for (len1 = 1; substr(v1, len1 + 1) ~ /^[0-9]/; len1++) continue
1477 for (len2 = 1; substr(v2, len2 + 1) ~ /^[0-9]/; len2++) continue
1478 d1 = substr(v1, 1, len1); v1 = substr(v1, len1 + 1)
1479 d2 = substr(v2, 1, len2); v2 = substr(v2, len2 + 1)
1482 # Compare two fractions.
1483 while (d1 ~ /^0/ && d2 ~ /^0/) {
1484 d1 = substr(d1, 2); len1--
1485 d2 = substr(d2, 2); len2--
1487 if (len1 != len2 && ! (len1 && len2 && substr(d1, 1, 1) == substr(d2, 1, 1))) {
1488 # The two components differ in length, and the common prefix
1489 # contains only leading zeros. Consider the longer to be less.
1493 # Otherwise, compare as strings.
1498 # A fraction is less than an integer.
1503 # An integer is greater than a fraction.
1506 # Compare two integers.
1512 # The normal case, without worrying about digits.
1513 d1 = substr(v1, 1, 1); v1 = substr(v1, 2)
1514 d2 = substr(v2, 1, 1); v2 = substr(v2, 2)
1519 # Beware Solaris /usr/xgp4/bin/awk (at least through Solaris 10),
1520 # which mishandles some comparisons of empty strings to integers.
1521 if (length(v2)) exit 1
1522 if (length(v1)) exit 2
1524 ']])# _AS_VERSION_COMPARE_PREPARE
1527 # AS_VERSION_COMPARE(VERSION-1, VERSION-2,
1528 # [ACTION-IF-LESS], [ACTION-IF-EQUAL], [ACTION-IF-GREATER])
1529 # -----------------------------------------------------------------------------
1530 # Compare two strings possibly containing shell variables as version strings.
1532 # This usage is portable even to ancient awk,
1533 # so don't worry about finding a "nice" awk version.
1534 m4_defun_init([AS_VERSION_COMPARE],
1535 [AS_REQUIRE([_$0_PREPARE])],
1538 awk "$as_awk_strverscmp" v1="$as_arg_v1" v2="$as_arg_v2" /dev/null
1542 [2], [$5])])# AS_VERSION_COMPARE
1546 ## --------------------------------------- ##
1547 ## 6. Common m4/sh character translation. ##
1548 ## --------------------------------------- ##
1550 # The point of this section is to provide high level macros comparable
1551 # to m4's `translit' primitive, but m4/sh polymorphic.
1552 # Transliteration of literal strings should be handled by m4, while
1553 # shell variables' content will be translated at runtime (tr or sed).
1558 # Output variables defining common character ranges.
1559 # See m4_cr_letters etc.
1560 m4_defun([_AS_CR_PREPARE],
1561 [# Avoid depending upon Character Ranges.
1562 as_cr_letters='abcdefghijklmnopqrstuvwxyz'
1563 as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
1564 as_cr_Letters=$as_cr_letters$as_cr_LETTERS
1565 as_cr_digits='0123456789'
1566 as_cr_alnum=$as_cr_Letters$as_cr_digits
1572 m4_defun([_AS_TR_SH_PREPARE],
1573 [AS_REQUIRE([_AS_CR_PREPARE])]dnl
1574 [# Sed expression to map a string onto a valid variable name.
1575 as_tr_sh="eval sed 'y%*+%pp%;s%[[^_$as_cr_alnum]]%_%g'"
1579 # AS_TR_SH(EXPRESSION)
1580 # --------------------
1581 # Transform EXPRESSION into a valid shell variable name.
1582 # sh/m4 polymorphic.
1583 # Be sure to update the definition of `$as_tr_sh' if you change this.
1585 # AS_LITERAL_IF guarantees that a literal does not have any nested quotes,
1586 # once $1 is expanded. m4_translit silently uses only the first occurrence
1587 # of a character that appears multiple times in argument 2, since we know
1588 # that m4_cr_not_symbols2 also contains [ and ]. m4_translit also silently
1589 # ignores characters in argument 3 that do not match argument 2; we use this
1590 # fact to skip worrying about the length of m4_cr_not_symbols2.
1592 # For speed, we inline the literal definitions that can be computed up front.
1593 m4_defun_init([AS_TR_SH],
1594 [AS_REQUIRE([_$0_PREPARE])],
1595 [AS_LITERAL_IF([$1],
1596 [m4_translit([$1], [*+[]]]]dnl
1597 m4_dquote(m4_dquote(m4_defn([m4_cr_not_symbols2])))[[,
1599 m4_dquote(m4_dquote(m4_for(,1,255,,[[_]])))[[)],
1600 [`AS_ECHO(["m4_bpatsubst(m4_dquote(m4_expand([$1])),
1601 [[\\`]], [\\\&])"]) | $as_tr_sh`])])
1604 # _AS_TR_CPP_PREPARE
1605 # ------------------
1606 m4_defun([_AS_TR_CPP_PREPARE],
1607 [AS_REQUIRE([_AS_CR_PREPARE])]dnl
1608 [# Sed expression to map a string onto a valid CPP name.
1609 as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[[^_$as_cr_alnum]]%_%g'"
1613 # AS_TR_CPP(EXPRESSION)
1614 # ---------------------
1615 # Map EXPRESSION to an upper case string which is valid as rhs for a
1616 # `#define'. sh/m4 polymorphic. Be sure to update the definition
1617 # of `$as_tr_cpp' if you change this.
1619 # See implementation comments in AS_TR_SH.
1620 m4_defun_init([AS_TR_CPP],
1621 [AS_REQUIRE([_$0_PREPARE])],
1622 [AS_LITERAL_IF([$1],
1623 [m4_translit([$1], [*[]]]]dnl
1624 m4_dquote(m4_dquote(m4_defn([m4_cr_letters])m4_defn([m4_cr_not_symbols2])))[[,
1626 m4_dquote(m4_dquote(m4_defn([m4_cr_LETTERS])m4_for(,1,255,,[[_]])))[[)],
1627 [`AS_ECHO(["$1"]) | $as_tr_cpp`])])
1632 m4_defun([_AS_TR_PREPARE],
1633 [AS_REQUIRE([_AS_TR_SH_PREPARE])AS_REQUIRE([_AS_TR_CPP_PREPARE])])
1638 ## ------------------------------------------------------ ##
1639 ## 7. Common m4/sh handling of variables (indirections). ##
1640 ## ------------------------------------------------------ ##
1643 # The purpose of this section is to provide a uniform API for
1644 # reading/setting sh variables with or without indirection.
1645 # Typically, one can write
1646 # AS_VAR_SET(var, val)
1648 # AS_VAR_SET(as_$var, val)
1649 # and expect the right thing to happen. In the descriptions below,
1650 # a literal name matches the regex [a-zA-Z_][a-zA-Z0-9_]*, an
1651 # indirect name is a shell expression that produces a literal name
1652 # when passed through eval, and a polymorphic name is either type.
1655 # _AS_VAR_APPEND_PREPARE
1656 # ----------------------
1657 # Define as_func_append to the optimum definition for the current
1658 # shell (bash and zsh provide the += assignment operator to avoid
1659 # quadratic append growth over repeated appends).
1660 m4_defun([_AS_VAR_APPEND_PREPARE],
1661 [AS_FUNCTION_DESCRIBE([as_func_append], [VAR VALUE],
1662 [Append the text in VALUE to the end of the definition contained in
1663 VAR. Take advantage of any shell optimizations that allow amortized
1664 linear growth over repeated appends, instead of the typical quadratic
1665 growth present in naive implementations.])
1666 AS_IF([_AS_RUN(["AS_ESCAPE([_AS_VAR_APPEND_WORKS])"])],
1667 [eval 'as_func_append ()
1673 eval $[]1=\$$[]1\$[]2
1674 }]) # as_func_append
1677 # _AS_VAR_APPEND_WORKS
1678 # --------------------
1679 # Output a shell test to discover whether += works.
1680 m4_define([_AS_VAR_APPEND_WORKS],
1681 [as_var=1; as_var+=2; test x$as_var = x12])
1683 # AS_VAR_APPEND(VAR, VALUE)
1684 # -------------------------
1685 # Append the shell expansion of VALUE to the end of the existing
1686 # contents of the polymorphic shell variable VAR, taking advantage of
1687 # any shell optimizations that allow repeated appends to result in
1688 # amortized linear scaling rather than quadratic behavior. This macro
1689 # is not worth the overhead unless the expected final size of the
1690 # contents of VAR outweigh the typical VALUE size of repeated appends.
1691 # Note that unlike AS_VAR_SET, VALUE must be properly quoted to avoid
1692 # field splitting and file name expansion.
1693 m4_defun_init([AS_VAR_APPEND],
1694 [AS_REQUIRE([_AS_VAR_APPEND_PREPARE], [], [M4SH-INIT-FN])],
1695 [as_func_append $1 $2])
1698 # _AS_VAR_ARITH_PREPARE
1699 # ---------------------
1700 # Define as_func_arith to the optimum definition for the current
1701 # shell (using POSIX $(()) where supported).
1702 m4_defun([_AS_VAR_ARITH_PREPARE],
1703 [AS_FUNCTION_DESCRIBE([as_func_arith], [ARG...],
1704 [Perform arithmetic evaluation on the ARGs, and store the result in
1705 the global $as_val. Take advantage of shells that can avoid forks.
1706 The arguments must be portable across $(()) and expr.])
1707 AS_IF([_AS_RUN(["AS_ESCAPE([_AS_VAR_ARITH_WORKS])"])],
1708 [eval 'as_func_arith ()
1714 as_val=`expr "$[]@"`
1718 # _AS_VAR_ARITH_WORKS
1719 # -------------------
1720 # Output a shell test to discover whether $(()) works.
1721 m4_define([_AS_VAR_ARITH_WORKS],
1722 [test $(( 1 + 1 )) = 2])
1724 # AS_VAR_ARITH(VAR, EXPR)
1725 # -----------------------
1726 # Perform the arithmetic evaluation of the arguments in EXPR, and set
1727 # contents of the polymorphic shell variable VAR to the result, taking
1728 # advantage of any shell optimizations that perform arithmetic without
1729 # forks. Note that numbers occuring within EXPR must be written in
1730 # decimal, and without leading zeroes; variables containing numbers
1731 # must be expanded prior to arithmetic evaluation; the first argument
1732 # must not be a negative number; there is no portable equality
1733 # operator; and operators must be given as separate arguments and
1735 m4_defun_init([AS_VAR_ARITH],
1736 [_AS_DETECT_SUGGESTED([_AS_VAR_ARITH_WORKS])]dnl
1737 [AS_REQUIRE([_AS_VAR_ARITH_PREPARE], [], [M4SH-INIT-FN])],
1738 [as_func_arith $2 && AS_VAR_SET([$1], [$as_val])])
1741 # AS_VAR_COPY(DEST, SOURCE)
1742 # -------------------------
1743 # Set the polymorphic shell variable DEST to the contents of the polymorphic
1744 # shell variable SOURCE.
1745 m4_define([AS_VAR_COPY],
1746 [AS_LITERAL_IF([$1[]$2], [$1=$$2], [eval $1=\$$2])])
1749 # AS_VAR_GET(VARIABLE)
1750 # --------------------
1751 # Get the value of the shell VARIABLE.
1752 # Evaluates to $VARIABLE if there are no indirection in VARIABLE,
1753 # else into the appropriate `eval' sequence.
1754 # This macro is deprecated because it sometimes mishandles trailing newlines;
1755 # use AS_VAR_COPY instead.
1756 m4_define([AS_VAR_GET],
1757 [AS_LITERAL_IF([$1],
1759 [`eval 'as_val=${'m4_bpatsubst([$1], [[\\`]], [\\\&])'};dnl
1760 AS_ECHO(["$as_val"])'`])])
1763 # AS_VAR_IF(VARIABLE, VALUE, IF-TRUE, IF-FALSE)
1764 # ---------------------------------------------
1765 # Implement a shell `if test $VARIABLE = VALUE; then-else'.
1766 # Polymorphic, and avoids sh expansion error upon interrupt or term signal.
1767 m4_define([AS_VAR_IF],
1768 [AS_LITERAL_IF([$1],
1769 [AS_IF([test "x$$1" = x""$2], [$3], [$4])],
1770 [AS_VAR_COPY([as_val], [$1])
1771 AS_IF([test "x$as_val" = x""$2], [$3], [$4])])])
1774 # AS_VAR_PUSHDEF and AS_VAR_POPDEF
1775 # --------------------------------
1778 # Sometimes we may have to handle literals (e.g. `stdlib.h'), while at
1779 # other moments, the same code may have to get the value from a
1780 # variable (e.g., `ac_header'). To have a uniform handling of both
1781 # cases, when a new value is about to be processed, declare a local
1784 # AS_VAR_PUSHDEF([header], [ac_cv_header_$1])
1786 # and then in the body of the macro, use `header' as is. It is of
1787 # first importance to use `AS_VAR_*' to access this variable.
1789 # If the value `$1' was a literal (e.g. `stdlib.h'), then `header' is
1790 # in fact the value `ac_cv_header_stdlib_h'. If `$1' was indirect,
1791 # then `header's value in m4 is in fact `$as_header', the shell
1792 # variable that holds all of the magic to get the expansion right.
1794 # At the end of the block, free the variable with
1796 # AS_VAR_POPDEF([header])
1799 # AS_VAR_POPDEF(VARNAME)
1800 # ----------------------
1801 # Free the shell variable accessor VARNAME. To be dnl'ed.
1802 m4_define([AS_VAR_POPDEF],
1806 # AS_VAR_PUSHDEF(VARNAME, VALUE)
1807 # ------------------------------
1808 # Define the m4 macro VARNAME to an accessor to the shell variable
1809 # named VALUE. VALUE does not need to be a valid shell variable name:
1810 # the transliteration is handled here. To be dnl'ed.
1812 # AS_TR_SH attempts to play with diversions if _AS_TR_SH_PREPARE has
1813 # not been expanded. However, users are expected to do subsequent
1814 # calls that trigger AS_LITERAL_IF([VARNAME]), and that macro performs
1815 # expansion inside an argument collection context, where diversions
1816 # don't work. Therefore, we must require the preparation ourselves.
1817 m4_defun_init([AS_VAR_PUSHDEF],
1818 [AS_REQUIRE([_AS_TR_SH_PREPARE])],
1819 [AS_LITERAL_IF([$2],
1820 [m4_pushdef([$1], [AS_TR_SH($2)])],
1822 m4_pushdef([$1], [$as_[$1]])])])
1825 # AS_VAR_SET(VARIABLE, VALUE)
1826 # ---------------------------
1827 # Set the contents of the polymorphic shell VARIABLE to the shell
1828 # expansion of VALUE. VALUE is immune to field splitting and file
1830 m4_define([AS_VAR_SET],
1831 [AS_LITERAL_IF([$1],
1833 [eval "$1=AS_ESCAPE([$2])"])])
1836 # AS_VAR_SET_IF(VARIABLE, IF-TRUE, IF-FALSE)
1837 # ------------------------------------------
1838 # Implement a shell `if-then-else' depending whether VARIABLE is set
1839 # or not. Polymorphic.
1840 m4_define([AS_VAR_SET_IF],
1841 [AS_IF([AS_VAR_TEST_SET([$1])], [$2], [$3])])
1844 # AS_VAR_TEST_SET(VARIABLE)
1845 # -------------------------
1846 # Expands into the `test' expression which is true if VARIABLE
1847 # is set. Polymorphic.
1848 m4_define([AS_VAR_TEST_SET],
1849 [AS_LITERAL_IF([$1],
1850 [test "${$1+set}" = set],
1851 [{ as_var=$1; eval "test \"\${$as_var+set}\" = set"; }])])
1854 ## -------------------- ##
1855 ## 8. Setting M4sh up. ##
1856 ## -------------------- ##
1859 # AS_INIT_GENERATED(FILE, [COMMENT])
1860 # ----------------------------------
1861 # Generate a child script FILE with all initialization necessary to
1862 # reuse the environment learned by the parent script, and make the
1863 # file executable. If COMMENT is supplied, it is inserted after the
1864 # `#!' sequence but before initialization text begins. After this
1865 # macro, additional text can be appended to FILE to form the body of
1866 # the child script. The macro ends with non-zero status if the
1867 # file could not be fully written (such as if the disk is full).
1868 m4_defun([AS_INIT_GENERATED],
1869 [m4_require([AS_PREPARE])]dnl
1870 [m4_pushdef([AS_MESSAGE_LOG_FD])]dnl
1872 cat >$1 <<_ASEOF || as_write_fail=1
1874 # Generated by $as_me.
1876 SHELL=\${CONFIG_SHELL-$SHELL}
1879 cat >>$1 <<\_ASEOF || as_write_fail=1
1882 exec AS_MESSAGE_FD>&1
1883 m4_text_box([Main body of $1 script.])
1885 test $as_write_fail = 0 && chmod +x $1[]dnl
1886 _m4_popdef([AS_MESSAGE_LOG_FD])])# AS_INIT_GENERATED
1892 m4_define([AS_INIT],
1893 [# Wrap our cleanup prior to m4sugar's cleanup.
1894 m4_wrap([_AS_CLEANUP])
1896 m4_provide([AS_INIT])
1898 # Forbidden tokens and exceptions.
1899 m4_pattern_forbid([^_?AS_])
1901 # Bangshe and minimal initialization.
1902 m4_divert_text([BINSH], [@%:@! /bin/sh])
1903 m4_divert_text([HEADER-COMMENT],
1904 [@%:@ Generated from __file__ by m4_PACKAGE_STRING.])
1905 m4_divert_text([M4SH-SANITIZE], [_AS_SHELL_SANITIZE])
1906 m4_divert_text([M4SH-INIT-FN], [m4_text_box([M4sh Shell Functions.])])
1909 m4_divert_pop([KILL])[]dnl
1910 m4_divert_push([BODY])
1911 m4_text_box([Main body of script.])
1912 _AS_DETECT_REQUIRED([_AS_SHELL_FN_WORK])dnl
1913 AS_REQUIRE([_AS_UNSET_PREPARE], [], [M4SH-INIT-FN])dnl