# =========================================================================== # http://www.gnu.org/software/autoconf-archive/ax_lua.html # =========================================================================== # # SYNOPSIS # # AX_PROG_LUA[([MINIMUM-VERSION], [TOO-BIG-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])] # AX_LUA_HEADERS[([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])] # AX_LUA_LIBS[([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])] # AX_LUA_READLINE[([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])] # # DESCRIPTION # # Detect a Lua interpreter, optionally specifying a minimum and maximum # version number. Set up important Lua paths, such as the directories in # which to install scripts and modules (shared libraries). # # Also detect Lua headers and libraries. The Lua version contained in the # header is checked to match the Lua interpreter version exactly. When # searching for Lua libraries, the version number is used as a suffix. # This is done with the goal of supporting multiple Lua installs (5.1 and # 5.2 side-by-side). # # A note on compatibility with previous versions: This file has been # mostly rewritten for serial 18. Most developers should be able to use # these macros without needing to modify configure.ac. Care has been taken # to preserve each macro's behavior, but there are some differences: # # 1) AX_WITH_LUA is deprecated; it now expands to the exact same thing as # AX_PROG_LUA with no arguments. # # 2) AX_LUA_HEADERS now checks that the version number defined in lua.h # matches the interpreter version. AX_LUA_HEADERS_VERSION is therefore # unnecessary, so it is deprecated and does not expand to anything. # # 3) The configure flag --with-lua-suffix no longer exists; the user # should instead specify the LUA precious variable on the command line. # See the AX_PROG_LUA description for details. # # Please read the macro descriptions below for more information. # # This file was inspired by Andrew Dalke's and James Henstridge's # python.m4 and Tom Payne's, Matthieu Moy's, and Reuben Thomas's ax_lua.m4 # (serial 17). Basically, this file is a mash-up of those two files. I # like to think it combines the best of the two! # # AX_PROG_LUA: Search for the Lua interpreter, and set up important Lua # paths. Adds precious variable LUA, which may contain the path of the Lua # interpreter. If LUA is blank, the user's path is searched for an # suitable interpreter. # # If MINIMUM-VERSION is supplied, then only Lua interpreters with a # version number greater or equal to MINIMUM-VERSION will be accepted. If # TOO-BIG- VERSION is also supplied, then only Lua interpreters with a # version number greater or equal to MINIMUM-VERSION and less than # TOO-BIG-VERSION will be accepted. # # The Lua version number, LUA_VERSION, is found from the interpreter, and # substituted. LUA_PLATFORM is also found, but not currently supported (no # standard representation). # # Finally, the macro finds four paths: # # luadir Directory to install Lua scripts. # pkgluadir $luadir/$PACKAGE # luaexecdir Directory to install Lua modules. # pkgluaexecdir $luaexecdir/$PACKAGE # # These paths a found based on $prefix, $exec_prefix, Lua's package.path, # and package.cpath. The first path of package.path beginning with $prefix # is selected as luadir. The first path of package.cpath beginning with # $exec_prefix is used as luaexecdir. This should work on all reasonable # Lua installations. If a path cannot be determined, a default path is # used. Of course, the user can override these later when invoking make. # # luadir Default: $prefix/share/lua/$LUA_VERSION # luaexecdir Default: $exec_prefix/lib/lua/$LUA_VERSION # # These directories can be used by Automake as install destinations. The # variable name minus 'dir' needs to be used as a prefix to the # appropriate Automake primary, e.g. lua_SCRIPS or luaexec_LIBRARIES. # # If an acceptable Lua interpreter is found, then ACTION-IF-FOUND is # performed, otherwise ACTION-IF-NOT-FOUND is preformed. If ACTION-IF-NOT- # FOUND is blank, then it will default to printing an error. To prevent # the default behavior, give ':' as an action. # # AX_LUA_HEADERS: Search for Lua headers. Requires that AX_PROG_LUA be # expanded before this macro. Adds precious variable LUA_INCLUDE, which # may contain Lua specific include flags, e.g. -I/usr/include/lua5.1. If # LUA_INCLUDE is blank, then this macro will attempt to find suitable # flags. # # LUA_INCLUDE can be used by Automake to compile Lua modules or # executables with embedded interpreters. The *_CPPFLAGS variables should # be used for this purpose, e.g. myprog_CPPFLAGS = $(LUA_INCLUDE). # # This macro searches for the header lua.h (and others). The search is # performed with a combination of CPPFLAGS, CPATH, etc, and LUA_INCLUDE. # If the search is unsuccessful, then some common directories are tried. # If the headers are then found, then LUA_INCLUDE is set accordingly. # # The paths automatically searched are: # # * /usr/include/luaX.Y # * /usr/include/lua/X.Y # * /usr/include/luaXY # * /usr/local/include/luaX.Y # * /usr/local/include/lua-X.Y # * /usr/local/include/lua/X.Y # * /usr/local/include/luaXY # # (Where X.Y is the Lua version number, e.g. 5.1.) # # The Lua version number found in the headers is always checked to match # the Lua interpreter's version number. Lua headers with mismatched # version numbers are not accepted. # # If headers are found, then ACTION-IF-FOUND is performed, otherwise # ACTION-IF-NOT-FOUND is performed. If ACTION-IF-NOT-FOUND is blank, then # it will default to printing an error. To prevent the default behavior, # set the action to ':'. # # AX_LUA_LIBS: Search for Lua libraries. Requires that AX_PROG_LUA be # expanded before this macro. Adds precious variable LUA_LIB, which may # contain Lua specific linker flags, e.g. -llua5.1. If LUA_LIB is blank, # then this macro will attempt to find suitable flags. # # LUA_LIB can be used by Automake to link Lua modules or executables with # embedded interpreters. The *_LIBADD and *_LDADD variables should be used # for this purpose, e.g. mymod_LIBADD = $(LUA_LIB). # # This macro searches for the Lua library. More technically, it searches # for a library containing the function lua_load. The search is performed # with a combination of LIBS, LIBRARY_PATH, and LUA_LIB. # # If the search determines that some linker flags are missing, then those # flags will be added to LUA_LIB. # # If libraries are found, then ACTION-IF-FOUND is performed, otherwise # ACTION-IF-NOT-FOUND is performed. If ACTION-IF-NOT-FOUND is blank, then # it will default to printing an error. To prevent the default behavior, # set the action to ':'. # # AX_LUA_READLINE: Search for readline headers and libraries. Requires the # AX_LIB_READLINE macro, which is provided by ax_lib_readline.m4 from the # Autoconf Archive. # # If a readline compatible library is found, then ACTION-IF-FOUND is # performed, otherwise ACTION-IF-NOT-FOUND is performed. # # LICENSE # # Copyright (c) 2014 Reuben Thomas # Copyright (c) 2013 Tim Perkins # # This program is free software: you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by the # Free Software Foundation, either version 3 of the License, or (at your # option) any later version. # # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General # Public License for more details. # # You should have received a copy of the GNU General Public License along # with this program. If not, see . # # As a special exception, the respective Autoconf Macro's copyright owner # gives unlimited permission to copy, distribute and modify the configure # scripts that are the output of Autoconf when processing the Macro. You # need not follow the terms of the GNU General Public License when using # or distributing such scripts, even though portions of the text of the # Macro appear in them. The GNU General Public License (GPL) does govern # all other use of the material that constitutes the Autoconf Macro. # # This special exception to the GPL applies to versions of the Autoconf # Macro released by the Autoconf Archive. When you make and distribute a # modified version of the Autoconf Macro, you may extend this special # exception to the GPL to apply to your modified version as well. #serial 23 dnl ========================================================================= dnl AX_PROG_LUA([MINIMUM-VERSION], [TOO-BIG-VERSION], dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) dnl ========================================================================= AC_DEFUN([AX_PROG_LUA], [ dnl Make LUA a precious variable. AC_ARG_VAR([LUA], [The Lua interpreter, e.g. /usr/bin/lua5.1]) dnl Find a Lua interpreter. m4_define_default([_AX_LUA_INTERPRETER_LIST], [lua lua5.2 lua52 lua5.1 lua51 lua50]) m4_if([$1], [], [ dnl No version check is needed. Find any Lua interpreter. AS_IF([test "x$LUA" = 'x'], [AC_PATH_PROGS([LUA], [_AX_LUA_INTERPRETER_LIST], [:])]) ax_display_LUA='lua' dnl At least check if this is a Lua interpreter. AC_MSG_CHECKING([if $LUA is a Lua interpreter]) _AX_LUA_CHK_IS_INTRP([$LUA], [AC_MSG_RESULT([yes])], [ AC_MSG_RESULT([no]) AC_MSG_ERROR([not a Lua interpreter]) ]) ], [ dnl A version check is needed. AS_IF([test "x$LUA" != 'x'], [ dnl Check if this is a Lua interpreter. AC_MSG_CHECKING([if $LUA is a Lua interpreter]) _AX_LUA_CHK_IS_INTRP([$LUA], [AC_MSG_RESULT([yes])], [ AC_MSG_RESULT([no]) AC_MSG_ERROR([not a Lua interpreter]) ]) dnl Check the version. m4_if([$2], [], [_ax_check_text="whether $LUA version >= $1"], [_ax_check_text="whether $LUA version >= $1, < $2"]) AC_MSG_CHECKING([$_ax_check_text]) _AX_LUA_CHK_VER([$LUA], [$1], [$2], [AC_MSG_RESULT([yes])], [ AC_MSG_RESULT([no]) AC_MSG_ERROR([version is out of range for specified LUA])]) ax_display_LUA=$LUA ], [ dnl Try each interpreter until we find one that satisfies VERSION. m4_if([$2], [], [_ax_check_text="for a Lua interpreter with version >= $1"], [_ax_check_text="for a Lua interpreter with version >= $1, < $2"]) AC_CACHE_CHECK([$_ax_check_text], [ax_cv_pathless_LUA], [ for ax_cv_pathless_LUA in _AX_LUA_INTERPRETER_LIST none; do test "x$ax_cv_pathless_LUA" = 'xnone' && break _AX_LUA_CHK_IS_INTRP([$ax_cv_pathless_LUA], [], [continue]) _AX_LUA_CHK_VER([$ax_cv_pathless_LUA], [$1], [$2], [break]) done ]) dnl Set $LUA to the absolute path of $ax_cv_pathless_LUA. AS_IF([test "x$ax_cv_pathless_LUA" = 'xnone'], [LUA=':'], [AC_PATH_PROG([LUA], [$ax_cv_pathless_LUA])]) ax_display_LUA=$ax_cv_pathless_LUA ]) ]) AS_IF([test "x$LUA" = 'x:'], [ dnl Run any user-specified action, or abort. m4_default([$4], [AC_MSG_ERROR([cannot find suitable Lua interpreter])]) ], [ dnl Query Lua for its version number. AC_CACHE_CHECK([for $ax_display_LUA version], [ax_cv_lua_version], [ ax_cv_lua_version=`$LUA -e 'print(_VERSION:match "(%d+%.%d+)")'` ]) AS_IF([test "x$ax_cv_lua_version" = 'x'], [AC_MSG_ERROR([invalid Lua version number])]) AC_SUBST([LUA_VERSION], [$ax_cv_lua_version]) AC_SUBST([LUA_SHORT_VERSION], [`echo "$LUA_VERSION" | sed 's|\.||'`]) dnl The following check is not supported: dnl At times (like when building shared libraries) you may want to know dnl which OS platform Lua thinks this is. AC_CACHE_CHECK([for $ax_display_LUA platform], [ax_cv_lua_platform], [ax_cv_lua_platform=`$LUA -e "print('unknown')"`]) AC_SUBST([LUA_PLATFORM], [$ax_cv_lua_platform]) dnl Use the values of $prefix and $exec_prefix for the corresponding dnl values of LUA_PREFIX and LUA_EXEC_PREFIX. These are made distinct dnl variables so they can be overridden if need be. However, the general dnl consensus is that you shouldn't need this ability. AC_SUBST([LUA_PREFIX], ['${prefix}']) AC_SUBST([LUA_EXEC_PREFIX], ['${exec_prefix}']) dnl Lua provides no way to query the script directory, and instead dnl provides LUA_PATH. However, we should be able to make a safe educated dnl guess. If the built-in search path contains a directory which is dnl prefixed by $prefix, then we can store scripts there. The first dnl matching path will be used. AC_CACHE_CHECK([for $ax_display_LUA script directory], [ax_cv_lua_luadir], [ AS_IF([test "x$prefix" = 'xNONE'], [ax_lua_prefix=$ac_default_prefix], [ax_lua_prefix=$prefix]) dnl Initialize to the default path. ax_cv_lua_luadir="$LUA_PREFIX/share/lua/$LUA_VERSION" dnl Try to find a path with the prefix. _AX_LUA_FND_PRFX_PTH([$LUA], [$ax_lua_prefix], [package.path]) AS_IF([test "x$ax_lua_prefixed_path" != 'x'], [ dnl Fix the prefix. _ax_strip_prefix=`echo "$ax_lua_prefix" | sed 's|.|.|g'` ax_cv_lua_luadir=`echo "$ax_lua_prefixed_path" | \ sed "s,^$_ax_strip_prefix,$LUA_PREFIX,"` ]) ]) AC_SUBST([luadir], [$ax_cv_lua_luadir]) AC_SUBST([pkgluadir], [\${luadir}/$PACKAGE]) dnl Lua provides no way to query the module directory, and instead dnl provides LUA_PATH. However, we should be able to make a safe educated dnl guess. If the built-in search path contains a directory which is dnl prefixed by $exec_prefix, then we can store modules there. The first dnl matching path will be used. AC_CACHE_CHECK([for $ax_display_LUA module directory], [ax_cv_lua_luaexecdir], [ AS_IF([test "x$exec_prefix" = 'xNONE'], [ax_lua_exec_prefix=$ax_lua_prefix], [ax_lua_exec_prefix=$exec_prefix]) dnl Initialize to the default path. ax_cv_lua_luaexecdir="$LUA_EXEC_PREFIX/lib/lua/$LUA_VERSION" dnl Try to find a path with the prefix. _AX_LUA_FND_PRFX_PTH([$LUA], [$ax_lua_exec_prefix], [package.cpathd]) AS_IF([test "x$ax_lua_prefixed_path" != 'x'], [ dnl Fix the prefix. _ax_strip_prefix=`echo "$ax_lua_exec_prefix" | sed 's|.|.|g'` ax_cv_lua_luaexecdir=`echo "$ax_lua_prefixed_path" | \ sed "s,^$_ax_strip_prefix,$LUA_EXEC_PREFIX,"` ]) ]) AC_SUBST([luaexecdir], [$ax_cv_lua_luaexecdir]) AC_SUBST([pkgluaexecdir], [\${luaexecdir}/$PACKAGE]) dnl Run any user specified action. $3 ]) ]) dnl AX_WITH_LUA is now the same thing as AX_PROG_LUA. AC_DEFUN([AX_WITH_LUA], [ AC_MSG_WARN([[$0 is deprecated, please use AX_PROG_LUA]]) AX_PROG_LUA ]) dnl ========================================================================= dnl _AX_LUA_CHK_IS_INTRP(PROG, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) dnl ========================================================================= AC_DEFUN([_AX_LUA_CHK_IS_INTRP], [ dnl Just print _VERSION because all Lua interpreters have this global. AS_IF([$1 -e "print('Hello ' .. _VERSION .. '!')" &>/dev/null], [$2], [$3]) ]) dnl ========================================================================= dnl _AX_LUA_CHK_VER(PROG, MINIMUM-VERSION, [TOO-BIG-VERSION], dnl [ACTION-IF-TRUE], [ACTION-IF-FALSE]) dnl ========================================================================= AC_DEFUN([_AX_LUA_CHK_VER], [ AS_IF([$1 2>/dev/null -e ' function norm (v) i,j=v:match "(%d+)%.(%d+)" return 100 * i + j end v=norm (_VERSION) os.exit ((v >= norm ("$2") and ("$3" == "" or v < norm ("$3"))) and 0 or 1)'], [$4], [$5]) ]) dnl ========================================================================= dnl _AX_LUA_FND_PRFX_PTH(PROG, PREFIX, LUA-PATH-VARIABLE) dnl ========================================================================= AC_DEFUN([_AX_LUA_FND_PRFX_PTH], [ dnl Invokes the Lua interpreter PROG to print the path variable dnl LUA-PATH-VARIABLE, usually package.path or package.cpath. Paths are dnl then matched against PREFIX. The first path to begin with PREFIX is set dnl to ax_lua_prefixed_path. ax_lua_prefixed_path='' _ax_package_paths=`$1 -e 'print($3)' 2>/dev/null | sed 's|;|\n|g'` dnl Try the paths in order, looking for the prefix. for _ax_package_path in $_ax_package_paths; do dnl Copy the path, up to the use of a Lua wildcard. _ax_path_parts=`echo "$_ax_package_path" | sed 's|/|\n|g'` _ax_reassembled='' for _ax_path_part in $_ax_path_parts; do echo "$_ax_path_part" | grep '\?' >/dev/null && break _ax_reassembled="$_ax_reassembled/$_ax_path_part" done dnl Check the path against the prefix. _ax_package_path=$_ax_reassembled if echo "$_ax_package_path" | grep "^$2" >/dev/null; then dnl Found it. ax_lua_prefixed_path=$_ax_package_path break fi done ]) dnl ========================================================================= dnl AX_LUA_HEADERS([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) dnl ========================================================================= AC_DEFUN([AX_LUA_HEADERS], [ dnl Check for LUA_VERSION. AC_MSG_CHECKING([if LUA_VERSION is defined]) AS_IF([test "x$LUA_VERSION" != 'x'], [AC_MSG_RESULT([yes])], [ AC_MSG_RESULT([no]) AC_MSG_ERROR([cannot check Lua headers without knowing LUA_VERSION]) ]) dnl Make LUA_INCLUDE a precious variable. AC_ARG_VAR([LUA_INCLUDE], [The Lua includes, e.g. -I/usr/include/lua5.1]) dnl Some default directories to search. LUA_SHORT_VERSION=`echo "$LUA_VERSION" | sed 's|\.||'` m4_define_default([_AX_LUA_INCLUDE_LIST], [ /usr/include/lua$LUA_VERSION \ /usr/include/lua/$LUA_VERSION \ /usr/include/lua$LUA_SHORT_VERSION \ /usr/local/include/lua$LUA_VERSION \ /usr/local/include/lua-$LUA_VERSION \ /usr/local/include/lua/$LUA_VERSION \ /usr/local/include/lua$LUA_SHORT_VERSION \ ]) dnl Try to find the headers. _ax_lua_saved_cppflags=$CPPFLAGS CPPFLAGS="$CPPFLAGS $LUA_INCLUDE" AC_CHECK_HEADERS([lua.h lualib.h lauxlib.h luaconf.h]) CPPFLAGS=$_ax_lua_saved_cppflags dnl Try some other directories if LUA_INCLUDE was not set. AS_IF([test "x$LUA_INCLUDE" = 'x' && test "x$ac_cv_header_lua_h" != 'xyes'], [ dnl Try some common include paths. for _ax_include_path in _AX_LUA_INCLUDE_LIST; do test ! -d "$_ax_include_path" && continue AC_MSG_CHECKING([for Lua headers in]) AC_MSG_RESULT([$_ax_include_path]) AS_UNSET([ac_cv_header_lua_h]) AS_UNSET([ac_cv_header_lualib_h]) AS_UNSET([ac_cv_header_lauxlib_h]) AS_UNSET([ac_cv_header_luaconf_h]) _ax_lua_saved_cppflags=$CPPFLAGS CPPFLAGS="$CPPFLAGS -I$_ax_include_path" AC_CHECK_HEADERS([lua.h lualib.h lauxlib.h luaconf.h]) CPPFLAGS=$_ax_lua_saved_cppflags AS_IF([test "x$ac_cv_header_lua_h" = 'xyes'], [ LUA_INCLUDE="-I$_ax_include_path" break ]) done ]) AS_IF([test "x$ac_cv_header_lua_h" = 'xyes' && test "x$cross_compiling" != 'xyes'], [ dnl Make a program to print LUA_VERSION defined in the header. dnl TODO This probably shouldn't be a runtime test. AC_CACHE_CHECK([for Lua header version], [ax_cv_lua_header_version], [ _ax_lua_saved_cppflags=$CPPFLAGS CPPFLAGS="$CPPFLAGS $LUA_INCLUDE" AC_RUN_IFELSE( [ AC_LANG_SOURCE([[ #include #include #include int main(int argc, char ** argv) { if(argc > 1) printf("%s", LUA_VERSION); exit(EXIT_SUCCESS); } ]]) ], [ ax_cv_lua_header_version=`./conftest$EXEEXT p | \ sed "s|^Lua \(.*\)|\1|" | \ grep -o "^@<:@0-9@:>@\+\\.@<:@0-9@:>@\+"` ], [ax_cv_lua_header_version='unknown']) CPPFLAGS=$_ax_lua_saved_cppflags ]) dnl Compare this to the previously found LUA_VERSION. AC_MSG_CHECKING([if Lua header version matches $LUA_VERSION]) AS_IF([test "x$ax_cv_lua_header_version" = "x$LUA_VERSION"], [ AC_MSG_RESULT([yes]) ax_header_version_match='yes' ], [ AC_MSG_RESULT([no]) ax_header_version_match='no' ]) ], [ ax_header_version_match='yes' ]) dnl Was LUA_INCLUDE specified? AS_IF([test "x$ax_header_version_match" != 'xyes' && test "x$LUA_INCLUDE" != 'x'], [AC_MSG_ERROR([cannot find headers for specified LUA_INCLUDE])]) dnl Test the final result and run user code. AS_IF([test "x$ax_header_version_match" = 'xyes'], [$1], [m4_default([$2], [AC_MSG_ERROR([cannot find Lua includes])])]) ]) dnl AX_LUA_HEADERS_VERSION no longer exists, use AX_LUA_HEADERS. AC_DEFUN([AX_LUA_HEADERS_VERSION], [ AC_MSG_WARN([[$0 is deprecated, please use AX_LUA_HEADERS]]) ]) dnl ========================================================================= dnl AX_LUA_LIBS([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) dnl ========================================================================= AC_DEFUN([AX_LUA_LIBS], [ dnl TODO Should this macro also check various -L flags? dnl Check for LUA_VERSION. AC_MSG_CHECKING([if LUA_VERSION is defined]) AS_IF([test "x$LUA_VERSION" != 'x'], [AC_MSG_RESULT([yes])], [ AC_MSG_RESULT([no]) AC_MSG_ERROR([cannot check Lua libs without knowing LUA_VERSION]) ]) dnl Make LUA_LIB a precious variable. AC_ARG_VAR([LUA_LIB], [The Lua library, e.g. -llua5.1]) AS_IF([test "x$LUA_LIB" != 'x'], [ dnl Check that LUA_LIBS works. _ax_lua_saved_libs=$LIBS LIBS="$LIBS $LUA_LIB" AC_SEARCH_LIBS([lua_load], [], [_ax_found_lua_libs='yes'], [_ax_found_lua_libs='no']) LIBS=$_ax_lua_saved_libs dnl Check the result. AS_IF([test "x$_ax_found_lua_libs" != 'xyes'], [AC_MSG_ERROR([cannot find libs for specified LUA_LIB])]) ], [ dnl First search for extra libs. _ax_lua_extra_libs='' _ax_lua_saved_libs=$LIBS LIBS="$LIBS $LUA_LIB" AC_SEARCH_LIBS([exp], [m]) AC_SEARCH_LIBS([dlopen], [dl]) LIBS=$_ax_lua_saved_libs AS_IF([test "x$ac_cv_search_exp" != 'xno' && test "x$ac_cv_search_exp" != 'xnone required'], [_ax_lua_extra_libs="$_ax_lua_extra_libs $ac_cv_search_exp"]) AS_IF([test "x$ac_cv_search_dlopen" != 'xno' && test "x$ac_cv_search_dlopen" != 'xnone required'], [_ax_lua_extra_libs="$_ax_lua_extra_libs $ac_cv_search_dlopen"]) dnl Try to find the Lua libs. _ax_lua_saved_libs=$LIBS LIBS="$LIBS $LUA_LIB" AC_SEARCH_LIBS([lua_load], [ lua$LUA_VERSION \ lua$LUA_SHORT_VERSION \ lua-$LUA_VERSION \ lua-$LUA_SHORT_VERSION \ lua], [_ax_found_lua_libs='yes'], [_ax_found_lua_libs='no'], [$_ax_lua_extra_libs]) LIBS=$_ax_lua_saved_libs AS_IF([test "x$ac_cv_search_lua_load" != 'xno' && test "x$ac_cv_search_lua_load" != 'xnone required'], [LUA_LIB="$ac_cv_search_lua_load $_ax_lua_extra_libs"]) ]) dnl Test the result and run user code. AS_IF([test "x$_ax_found_lua_libs" = 'xyes'], [$1], [m4_default([$2], [AC_MSG_ERROR([cannot find Lua libs])])]) ]) dnl ========================================================================= dnl AX_LUA_READLINE([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) dnl ========================================================================= AC_DEFUN([AX_LUA_READLINE], [ AX_LIB_READLINE AS_IF([test "x$ac_cv_header_readline_readline_h" != 'x' && test "x$ac_cv_header_readline_history_h" != 'x'], [ LUA_LIBS_CFLAGS="-DLUA_USE_READLINE $LUA_LIBS_CFLAGS" $1 ], [$2]) ])