1 # ===========================================================================
2 # http://www.gnu.org/software/autoconf-archive/ax_lua.html
3 # ===========================================================================
7 # AX_PROG_LUA[([MINIMUM-VERSION], [TOO-BIG-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])]
8 # AX_LUA_HEADERS[([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])]
9 # AX_LUA_LIBS[([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])]
10 # AX_LUA_READLINE[([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])]
14 # Detect a Lua interpreter, optionally specifying a minimum and maximum
15 # version number. Set up important Lua paths, such as the directories in
16 # which to install scripts and modules (shared libraries).
18 # Also detect Lua headers and libraries. The Lua version contained in the
19 # header is checked to match the Lua interpreter version exactly. When
20 # searching for Lua libraries, the version number is used as a suffix.
21 # This is done with the goal of supporting multiple Lua installs (5.1 and
24 # A note on compatibility with previous versions: This file has been
25 # mostly rewritten for serial 18. Most developers should be able to use
26 # these macros without needing to modify configure.ac. Care has been taken
27 # to preserve each macro's behavior, but there are some differences:
29 # 1) AX_WITH_LUA is deprecated; it now expands to the exact same thing as
30 # AX_PROG_LUA with no arguments.
32 # 2) AX_LUA_HEADERS now checks that the version number defined in lua.h
33 # matches the interpreter version. AX_LUA_HEADERS_VERSION is therefore
34 # unnecessary, so it is deprecated and does not expand to anything.
36 # 3) The configure flag --with-lua-suffix no longer exists; the user
37 # should instead specify the LUA precious variable on the command line.
38 # See the AX_PROG_LUA description for details.
40 # Please read the macro descriptions below for more information.
42 # This file was inspired by Andrew Dalke's and James Henstridge's
43 # python.m4 and Tom Payne's, Matthieu Moy's, and Reuben Thomas's ax_lua.m4
44 # (serial 17). Basically, this file is a mash-up of those two files. I
45 # like to think it combines the best of the two!
47 # AX_PROG_LUA: Search for the Lua interpreter, and set up important Lua
48 # paths. Adds precious variable LUA, which may contain the path of the Lua
49 # interpreter. If LUA is blank, the user's path is searched for an
50 # suitable interpreter.
52 # If MINIMUM-VERSION is supplied, then only Lua interpreters with a
53 # version number greater or equal to MINIMUM-VERSION will be accepted. If
54 # TOO-BIG- VERSION is also supplied, then only Lua interpreters with a
55 # version number greater or equal to MINIMUM-VERSION and less than
56 # TOO-BIG-VERSION will be accepted.
58 # Version comparisons require the AX_COMPARE_VERSION macro, which is
59 # provided by ax_compare_version.m4 from the Autoconf Archive.
61 # The Lua version number, LUA_VERSION, is found from the interpreter, and
62 # substituted. LUA_PLATFORM is also found, but not currently supported (no
63 # standard representation).
65 # Finally, the macro finds four paths:
67 # luadir Directory to install Lua scripts.
68 # pkgluadir $luadir/$PACKAGE
69 # luaexecdir Directory to install Lua modules.
70 # pkgluaexecdir $luaexecdir/$PACKAGE
72 # These paths a found based on $prefix, $exec_prefix, Lua's package.path,
73 # and package.cpath. The first path of package.path beginning with $prefix
74 # is selected as luadir. The first path of package.cpath beginning with
75 # $exec_prefix is used as luaexecdir. This should work on all reasonable
76 # Lua installations. If a path cannot be determined, a default path is
77 # used. Of course, the user can override these later when invoking make.
79 # luadir Default: $prefix/share/lua/$LUA_VERSION
80 # luaexecdir Default: $exec_prefix/lib/lua/$LUA_VERSION
82 # These directories can be used by Automake as install destinations. The
83 # variable name minus 'dir' needs to be used as a prefix to the
84 # appropriate Automake primary, e.g. lua_SCRIPS or luaexec_LIBRARIES.
86 # If an acceptable Lua interpreter is found, then ACTION-IF-FOUND is
87 # performed, otherwise ACTION-IF-NOT-FOUND is preformed. If ACTION-IF-NOT-
88 # FOUND is blank, then it will default to printing an error. To prevent
89 # the default behavior, give ':' as an action.
91 # AX_LUA_HEADERS: Search for Lua headers. Requires that AX_PROG_LUA be
92 # expanded before this macro. Adds precious variable LUA_INCLUDE, which
93 # may contain Lua specific include flags, e.g. -I/usr/include/lua5.1. If
94 # LUA_INCLUDE is blank, then this macro will attempt to find suitable
97 # LUA_INCLUDE can be used by Automake to compile Lua modules or
98 # executables with embedded interpreters. The *_CPPFLAGS variables should
99 # be used for this purpose, e.g. myprog_CPPFLAGS = $(LUA_INCLUDE).
101 # This macro searches for the header lua.h (and others). The search is
102 # performed with a combination of CPPFLAGS, CPATH, etc, and LUA_INCLUDE.
103 # If the search is unsuccessful, then some common directories are tried.
104 # If the headers are then found, then LUA_INCLUDE is set accordingly.
106 # The paths automatically searched are:
108 # * /usr/include/luaX.Y
109 # * /usr/include/lua/X.Y
110 # * /usr/include/luaXY
111 # * /usr/local/include/luaX.Y
112 # * /usr/local/include/lua/X.Y
113 # * /usr/local/include/luaXY
115 # (Where X.Y is the Lua version number, e.g. 5.1.)
117 # The Lua version number found in the headers is always checked to match
118 # the Lua interpreter's version number. Lua headers with mismatched
119 # version numbers are not accepted.
121 # If headers are found, then ACTION-IF-FOUND is performed, otherwise
122 # ACTION-IF-NOT-FOUND is performed. If ACTION-IF-NOT-FOUND is blank, then
123 # it will default to printing an error. To prevent the default behavior,
124 # set the action to ':'.
126 # AX_LUA_LIBS: Search for Lua libraries. Requires that AX_PROG_LUA be
127 # expanded before this macro. Adds precious variable LUA_LIB, which may
128 # contain Lua specific linker flags, e.g. -llua5.1. If LUA_LIB is blank,
129 # then this macro will attempt to find suitable flags.
131 # LUA_LIB can be used by Automake to link Lua modules or executables with
132 # embedded interpreters. The *_LIBADD and *_LDADD variables should be used
133 # for this purpose, e.g. mymod_LIBADD = $(LUA_LIB).
135 # This macro searches for the Lua library. More technically, it searches
136 # for a library containing the function lua_load. The search is performed
137 # with a combination of LIBS, LIBRARY_PATH, and LUA_LIB.
139 # If the search determines that some linker flags are missing, then those
140 # flags will be added to LUA_LIB.
142 # If libraries are found, then ACTION-IF-FOUND is performed, otherwise
143 # ACTION-IF-NOT-FOUND is performed. If ACTION-IF-NOT-FOUND is blank, then
144 # it will default to printing an error. To prevent the default behavior,
145 # set the action to ':'.
147 # AX_LUA_READLINE: Search for readline headers and libraries. Requires the
148 # AX_LIB_READLINE macro, which is provided by ax_lib_readline.m4 from the
151 # If a readline compatible library is found, then ACTION-IF-FOUND is
152 # performed, otherwise ACTION-IF-NOT-FOUND is performed.
156 # Copyright (c) 2013 Tim Perkins <tprk77@gmail.com>
157 # Copyright (c) 2013 Reuben Thomas <rrt@sc3d.org>
159 # This program is free software: you can redistribute it and/or modify it
160 # under the terms of the GNU General Public License as published by the
161 # Free Software Foundation, either version 3 of the License, or (at your
162 # option) any later version.
164 # This program is distributed in the hope that it will be useful, but
165 # WITHOUT ANY WARRANTY; without even the implied warranty of
166 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
167 # Public License for more details.
169 # You should have received a copy of the GNU General Public License along
170 # with this program. If not, see <http://www.gnu.org/licenses/>.
172 # As a special exception, the respective Autoconf Macro's copyright owner
173 # gives unlimited permission to copy, distribute and modify the configure
174 # scripts that are the output of Autoconf when processing the Macro. You
175 # need not follow the terms of the GNU General Public License when using
176 # or distributing such scripts, even though portions of the text of the
177 # Macro appear in them. The GNU General Public License (GPL) does govern
178 # all other use of the material that constitutes the Autoconf Macro.
180 # This special exception to the GPL applies to versions of the Autoconf
181 # Macro released by the Autoconf Archive. When you make and distribute a
182 # modified version of the Autoconf Macro, you may extend this special
183 # exception to the GPL to apply to your modified version as well.
187 dnl =========================================================================
188 dnl AX_PROG_LUA([MINIMUM-VERSION], [TOO-BIG-VERSION],
189 dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
190 dnl =========================================================================
191 AC_DEFUN([AX_PROG_LUA],
193 dnl Make LUA a precious variable.
194 AC_ARG_VAR([LUA], [The Lua interpreter, e.g. /usr/bin/lua5.1])
196 dnl Find a Lua interpreter.
197 m4_define_default([_AX_LUA_INTERPRETER_LIST],
198 [lua lua5.2 lua5.1 lua50])
201 [ dnl No version check is needed. Find any Lua interpreter.
202 AS_IF([test "x$LUA" = 'x'],
203 [AC_PATH_PROGS([LUA], [_AX_LUA_INTERPRETER_LIST], [:])])
206 dnl At least check if this is a Lua interpreter.
207 AC_MSG_CHECKING([if $LUA is a Lua interpreter])
208 _AX_LUA_CHK_IS_INTRP([$LUA],
209 [AC_MSG_RESULT([yes])],
210 [ AC_MSG_RESULT([no])
211 AC_MSG_ERROR([not a Lua interpreter])
214 [ dnl A version check is needed.
215 AS_IF([test "x$LUA" != 'x'],
216 [ dnl Check if this is a Lua interpreter.
217 AC_MSG_CHECKING([if $LUA is a Lua interpreter])
218 _AX_LUA_CHK_IS_INTRP([$LUA],
219 [AC_MSG_RESULT([yes])],
220 [ AC_MSG_RESULT([no])
221 AC_MSG_ERROR([not a Lua interpreter])
223 dnl Check the version.
225 [_ax_check_text="whether $LUA version >= $1"],
226 [_ax_check_text="whether $LUA version >= $1, < $2"])
227 AC_MSG_CHECKING([$_ax_check_text])
228 _AX_LUA_CHK_VER([$LUA], [$1], [$2],
229 [AC_MSG_RESULT([yes])],
230 [ AC_MSG_RESULT([no])
231 AC_MSG_ERROR([version is out of range for specified LUA])])
234 [ dnl Try each interpreter until we find one that satisfies VERSION.
236 [_ax_check_text="for a Lua interpreter with version >= $1"],
237 [_ax_check_text="for a Lua interpreter with version >= $1, < $2"])
238 AC_CACHE_CHECK([$_ax_check_text],
239 [ax_cv_pathless_LUA],
240 [ for ax_cv_pathless_LUA in _AX_LUA_INTERPRETER_LIST none; do
241 test "x$ax_cv_pathless_LUA" = 'xnone' && break
242 _AX_LUA_CHK_IS_INTRP([$ax_cv_pathless_LUA], [], [continue])
243 _AX_LUA_CHK_VER([$ax_cv_pathless_LUA], [$1], [$2], [break])
246 dnl Set $LUA to the absolute path of $ax_cv_pathless_LUA.
247 AS_IF([test "x$ax_cv_pathless_LUA" = 'xnone'],
249 [AC_PATH_PROG([LUA], [$ax_cv_pathless_LUA])])
250 ax_display_LUA=$ax_cv_pathless_LUA
254 AS_IF([test "x$LUA" = 'x:'],
255 [ dnl Run any user-specified action, or abort.
256 m4_default([$4], [AC_MSG_ERROR([cannot find suitable Lua interpreter])])
258 [ dnl Query Lua for its version number.
259 AC_CACHE_CHECK([for $ax_display_LUA version], [ax_cv_lua_version],
260 [ ax_cv_lua_version=`$LUA -e "print(_VERSION)" | \
261 sed "s|^Lua \(.*\)|\1|" | \
262 grep -o "^@<:@0-9@:>@\+\\.@<:@0-9@:>@\+"`
264 AS_IF([test "x$ax_cv_lua_version" = 'x'],
265 [AC_MSG_ERROR([invalid Lua version number])])
266 AC_SUBST([LUA_VERSION], [$ax_cv_lua_version])
267 AC_SUBST([LUA_SHORT_VERSION], [`echo "$LUA_VERSION" | sed 's|\.||'`])
269 dnl The following check is not supported:
270 dnl At times (like when building shared libraries) you may want to know
271 dnl which OS platform Lua thinks this is.
272 AC_CACHE_CHECK([for $ax_display_LUA platform], [ax_cv_lua_platform],
273 [ax_cv_lua_platform=`$LUA -e "print('unknown')"`])
274 AC_SUBST([LUA_PLATFORM], [$ax_cv_lua_platform])
276 dnl Use the values of $prefix and $exec_prefix for the corresponding
277 dnl values of LUA_PREFIX and LUA_EXEC_PREFIX. These are made distinct
278 dnl variables so they can be overridden if need be. However, the general
279 dnl consensus is that you shouldn't need this ability.
280 AC_SUBST([LUA_PREFIX], ['${prefix}'])
281 AC_SUBST([LUA_EXEC_PREFIX], ['${exec_prefix}'])
283 dnl Lua provides no way to query the script directory, and instead
284 dnl provides LUA_PATH. However, we should be able to make a safe educated
285 dnl guess. If the built-in search path contains a directory which is
286 dnl prefixed by $prefix, then we can store scripts there. The first
287 dnl matching path will be used.
288 AC_CACHE_CHECK([for $ax_display_LUA script directory],
290 [ AS_IF([test "x$prefix" = 'xNONE'],
291 [ax_lua_prefix=$ac_default_prefix],
292 [ax_lua_prefix=$prefix])
294 dnl Initialize to the default path.
295 ax_cv_lua_luadir="$LUA_PREFIX/share/lua/$LUA_VERSION"
297 dnl Try to find a path with the prefix.
298 _AX_LUA_FND_PRFX_PTH([$LUA], [$ax_lua_prefix], [package.path])
299 AS_IF([test "x$ax_lua_prefixed_path" != 'x'],
300 [ dnl Fix the prefix.
301 _ax_strip_prefix=`echo "$ax_lua_prefix" | sed 's|.|.|g'`
302 ax_cv_lua_luadir=`echo "$ax_lua_prefixed_path" | \
303 sed "s,^$_ax_strip_prefix,$LUA_PREFIX,"`
306 AC_SUBST([luadir], [$ax_cv_lua_luadir])
307 AC_SUBST([pkgluadir], [\${luadir}/$PACKAGE])
309 dnl Lua provides no way to query the module directory, and instead
310 dnl provides LUA_PATH. However, we should be able to make a safe educated
311 dnl guess. If the built-in search path contains a directory which is
312 dnl prefixed by $exec_prefix, then we can store modules there. The first
313 dnl matching path will be used.
314 AC_CACHE_CHECK([for $ax_display_LUA module directory],
315 [ax_cv_lua_luaexecdir],
316 [ AS_IF([test "x$exec_prefix" = 'xNONE'],
317 [ax_lua_exec_prefix=$ax_lua_prefix],
318 [ax_lua_exec_prefix=$exec_prefix])
320 dnl Initialize to the default path.
321 ax_cv_lua_luaexecdir="$LUA_EXEC_PREFIX/lib/lua/$LUA_VERSION"
323 dnl Try to find a path with the prefix.
324 _AX_LUA_FND_PRFX_PTH([$LUA],
325 [$ax_lua_exec_prefix], [package.cpathd])
326 AS_IF([test "x$ax_lua_prefixed_path" != 'x'],
327 [ dnl Fix the prefix.
328 _ax_strip_prefix=`echo "$ax_lua_exec_prefix" | sed 's|.|.|g'`
329 ax_cv_lua_luaexecdir=`echo "$ax_lua_prefixed_path" | \
330 sed "s,^$_ax_strip_prefix,$LUA_EXEC_PREFIX,"`
333 AC_SUBST([luaexecdir], [$ax_cv_lua_luaexecdir])
334 AC_SUBST([pkgluaexecdir], [\${luaexecdir}/$PACKAGE])
336 dnl Run any user specified action.
341 dnl AX_WITH_LUA is now the same thing as AX_PROG_LUA.
342 AC_DEFUN([AX_WITH_LUA],
344 AC_MSG_WARN([[$0 is deprecated, please use AX_PROG_LUA]])
349 dnl =========================================================================
350 dnl _AX_LUA_CHK_IS_INTRP(PROG, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
351 dnl =========================================================================
352 AC_DEFUN([_AX_LUA_CHK_IS_INTRP],
354 dnl Just print _VERSION because all Lua interpreters have this global.
355 AS_IF([$1 -e "print('Hello ' .. _VERSION .. '!')" &>/dev/null],
360 dnl =========================================================================
361 dnl _AX_LUA_CHK_VER(PROG, MINIMUM-VERSION, [TOO-BIG-VERSION],
362 dnl [ACTION-IF-TRUE], [ACTION-IF-FALSE])
363 dnl =========================================================================
364 AC_DEFUN([_AX_LUA_CHK_VER],
366 _ax_test_ver=`$1 -e "print(_VERSION)" 2>/dev/null | \
367 sed "s|^Lua \(.*\)|\1|" | grep -o "^@<:@0-9@:>@\+\\.@<:@0-9@:>@\+"`
368 AS_IF([test "x$_ax_test_ver" = 'x'],
370 AX_COMPARE_VERSION([$_ax_test_ver], [ge], [$2])
372 [ AS_IF([$ax_compare_version],
373 [AX_COMPARE_VERSION([$_ax_test_ver], [lt], [$3])])
375 AS_IF([$ax_compare_version], [$4], [$5])
379 dnl =========================================================================
380 dnl _AX_LUA_FND_PRFX_PTH(PROG, PREFIX, LUA-PATH-VARIABLE)
381 dnl =========================================================================
382 AC_DEFUN([_AX_LUA_FND_PRFX_PTH],
384 dnl Invokes the Lua interpreter PROG to print the path variable
385 dnl LUA-PATH-VARIABLE, usually package.path or package.cpath. Paths are
386 dnl then matched against PREFIX. The first path to begin with PREFIX is set
387 dnl to ax_lua_prefixed_path.
389 ax_lua_prefixed_path=''
390 _ax_package_paths=`$1 -e 'print($3)' 2>/dev/null | sed 's|;|\n|g'`
391 dnl Try the paths in order, looking for the prefix.
392 for _ax_package_path in $_ax_package_paths; do
393 dnl Copy the path, up to the use of a Lua wildcard.
394 _ax_path_parts=`echo "$_ax_package_path" | sed 's|/|\n|g'`
396 for _ax_path_part in $_ax_path_parts; do
397 echo "$_ax_path_part" | grep '\?' >/dev/null && break
398 _ax_reassembled="$_ax_reassembled/$_ax_path_part"
400 dnl Check the path against the prefix.
401 _ax_package_path=$_ax_reassembled
402 if echo "$_ax_package_path" | grep "^$2" >/dev/null; then
404 ax_lua_prefixed_path=$_ax_package_path
411 dnl =========================================================================
412 dnl AX_LUA_HEADERS([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
413 dnl =========================================================================
414 AC_DEFUN([AX_LUA_HEADERS],
416 dnl Check for LUA_VERSION.
417 AC_MSG_CHECKING([if LUA_VERSION is defined])
418 AS_IF([test "x$LUA_VERSION" != 'x'],
419 [AC_MSG_RESULT([yes])],
420 [ AC_MSG_RESULT([no])
421 AC_MSG_ERROR([cannot check Lua headers without knowing LUA_VERSION])
424 dnl Make LUA_INCLUDE a precious variable.
425 AC_ARG_VAR([LUA_INCLUDE], [The Lua includes, e.g. -I/usr/include/lua5.1])
427 dnl Some default directories to search.
428 LUA_SHORT_VERSION=`echo "$LUA_VERSION" | sed 's|\.||'`
429 m4_define_default([_AX_LUA_INCLUDE_LIST],
430 [ /usr/include/lua$LUA_VERSION \
431 /usr/include/lua/$LUA_VERSION \
432 /usr/include/lua$LUA_SHORT_VERSION \
433 /usr/local/include/lua$LUA_VERSION \
434 /usr/local/include/lua/$LUA_VERSION \
435 /usr/local/include/lua$LUA_SHORT_VERSION \
438 dnl Try to find the headers.
439 _ax_lua_saved_cppflags=$CPPFLAGS
440 CPPFLAGS="$CPPFLAGS $LUA_INCLUDE"
441 AC_CHECK_HEADERS([lua.h lualib.h lauxlib.h luaconf.h])
442 CPPFLAGS=$_ax_lua_saved_cppflags
444 dnl Try some other directories if LUA_INCLUDE was not set.
445 AS_IF([test "x$LUA_INCLUDE" = 'x' &&
446 test "x$ac_cv_header_lua_h" != 'xyes'],
447 [ dnl Try some common include paths.
448 for _ax_include_path in _AX_LUA_INCLUDE_LIST; do
449 test ! -d "$_ax_include_path" && continue
451 AC_MSG_CHECKING([for Lua headers in])
452 AC_MSG_RESULT([$_ax_include_path])
454 AS_UNSET([ac_cv_header_lua_h])
455 AS_UNSET([ac_cv_header_lualib_h])
456 AS_UNSET([ac_cv_header_lauxlib_h])
457 AS_UNSET([ac_cv_header_luaconf_h])
459 _ax_lua_saved_cppflags=$CPPFLAGS
460 CPPFLAGS="$CPPFLAGS -I$_ax_include_path"
461 AC_CHECK_HEADERS([lua.h lualib.h lauxlib.h luaconf.h])
462 CPPFLAGS=$_ax_lua_saved_cppflags
464 AS_IF([test "x$ac_cv_header_lua_h" = 'xyes'],
465 [ LUA_INCLUDE="-I$_ax_include_path"
471 AS_IF([test "x$ac_cv_header_lua_h" = 'xyes'],
472 [ dnl Make a program to print LUA_VERSION defined in the header.
473 dnl TODO This probably shouldn't be a runtime test.
475 AC_CACHE_CHECK([for Lua header version],
476 [ax_cv_lua_header_version],
477 [ _ax_lua_saved_cppflags=$CPPFLAGS
478 CPPFLAGS="$CPPFLAGS $LUA_INCLUDE"
484 int main(int argc, char ** argv)
486 if(argc > 1) printf("%s", LUA_VERSION);
491 [ ax_cv_lua_header_version=`./conftest$EXEEXT p | \
492 sed "s|^Lua \(.*\)|\1|" | \
493 grep -o "^@<:@0-9@:>@\+\\.@<:@0-9@:>@\+"`
495 [ax_cv_lua_header_version='unknown'])
496 CPPFLAGS=$_ax_lua_saved_cppflags
499 dnl Compare this to the previously found LUA_VERSION.
500 AC_MSG_CHECKING([if Lua header version matches $LUA_VERSION])
501 AS_IF([test "x$ax_cv_lua_header_version" = "x$LUA_VERSION"],
502 [ AC_MSG_RESULT([yes])
503 ax_header_version_match='yes'
505 [ AC_MSG_RESULT([no])
506 ax_header_version_match='no'
510 dnl Was LUA_INCLUDE specified?
511 AS_IF([test "x$ax_header_version_match" != 'xyes' &&
512 test "x$LUA_INCLUDE" != 'x'],
513 [AC_MSG_ERROR([cannot find headers for specified LUA_INCLUDE])])
515 dnl Test the final result and run user code.
516 AS_IF([test "x$ax_header_version_match" = 'xyes'], [$1],
517 [m4_default([$2], [AC_MSG_ERROR([cannot find Lua includes])])])
520 dnl AX_LUA_HEADERS_VERSION no longer exists, use AX_LUA_HEADERS.
521 AC_DEFUN([AX_LUA_HEADERS_VERSION],
523 AC_MSG_WARN([[$0 is deprecated, please use AX_LUA_HEADERS]])
527 dnl =========================================================================
528 dnl AX_LUA_LIBS([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
529 dnl =========================================================================
530 AC_DEFUN([AX_LUA_LIBS],
532 dnl TODO Should this macro also check various -L flags?
534 dnl Check for LUA_VERSION.
535 AC_MSG_CHECKING([if LUA_VERSION is defined])
536 AS_IF([test "x$LUA_VERSION" != 'x'],
537 [AC_MSG_RESULT([yes])],
538 [ AC_MSG_RESULT([no])
539 AC_MSG_ERROR([cannot check Lua libs without knowing LUA_VERSION])
542 dnl Make LUA_LIB a precious variable.
543 AC_ARG_VAR([LUA_LIB], [The Lua library, e.g. -llua5.1])
545 AS_IF([test "x$LUA_LIB" != 'x'],
546 [ dnl Check that LUA_LIBS works.
547 _ax_lua_saved_libs=$LIBS
548 LIBS="$LIBS $LUA_LIB"
549 AC_SEARCH_LIBS([lua_load], [],
550 [_ax_found_lua_libs='yes'],
551 [_ax_found_lua_libs='no'])
552 LIBS=$_ax_lua_saved_libs
554 dnl Check the result.
555 AS_IF([test "x$_ax_found_lua_libs" != 'xyes'],
556 [AC_MSG_ERROR([cannot find libs for specified LUA_LIB])])
558 [ dnl First search for extra libs.
559 _ax_lua_extra_libs=''
561 _ax_lua_saved_libs=$LIBS
562 LIBS="$LIBS $LUA_LIB"
563 AC_SEARCH_LIBS([exp], [m])
564 AC_SEARCH_LIBS([dlopen], [dl])
565 LIBS=$_ax_lua_saved_libs
567 AS_IF([test "x$ac_cv_search_exp" != 'xno' &&
568 test "x$ac_cv_search_exp" != 'xnone required'],
569 [_ax_lua_extra_libs="$_ax_lua_extra_libs $ac_cv_search_exp"])
571 AS_IF([test "x$ac_cv_search_dlopen" != 'xno' &&
572 test "x$ac_cv_search_dlopen" != 'xnone required'],
573 [_ax_lua_extra_libs="$_ax_lua_extra_libs $ac_cv_search_dlopen"])
575 dnl Try to find the Lua libs.
576 _ax_lua_saved_libs=$LIBS
577 LIBS="$LIBS $LUA_LIB"
578 AC_SEARCH_LIBS([lua_load], [lua$LUA_VERSION lua$LUA_SHORT_VERSION lua],
579 [_ax_found_lua_libs='yes'],
580 [_ax_found_lua_libs='no'],
581 [$_ax_lua_extra_libs])
582 LIBS=$_ax_lua_saved_libs
584 AS_IF([test "x$ac_cv_search_lua_load" != 'xno' &&
585 test "x$ac_cv_search_lua_load" != 'xnone required'],
586 [LUA_LIB="$ac_cv_search_lua_load $_ax_lua_extra_libs"])
589 dnl Test the result and run user code.
590 AS_IF([test "x$_ax_found_lua_libs" = 'xyes'], [$1],
591 [m4_default([$2], [AC_MSG_ERROR([cannot find Lua libs])])])
595 dnl =========================================================================
596 dnl AX_LUA_READLINE([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
597 dnl =========================================================================
598 AC_DEFUN([AX_LUA_READLINE],
601 AS_IF([test "x$ac_cv_header_readline_readline_h" != 'x' &&
602 test "x$ac_cv_header_readline_history_h" != 'x'],
603 [ LUA_LIBS_CFLAGS="-DLUA_USE_READLINE $LUA_LIBS_CFLAGS"