--- /dev/null
+# ===========================================================================
+# 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,
+# 5.2, and 5.3 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 are 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) 2015 Reuben Thomas <rrt@sc3d.org>
+# Copyright (c) 2014 Tim Perkins <tprk77@gmail.com>
+#
+# 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 <http://www.gnu.org/licenses/>.
+#
+# 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 39
+
+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 Check for required tools.
+ AC_REQUIRE([AC_PROG_GREP])
+ AC_REQUIRE([AC_PROG_SED])
+
+ 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 lua5.3 lua53 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'
+
+ AS_IF([test "x$LUA" != 'x:'],
+ [ 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 $ax_display_LUA version],
+ [ax_cv_lua_version],
+ [ dnl Get the interpreter version in X.Y format. This should work for
+ dnl interpreters version 5.0 and beyond.
+ ax_cv_lua_version=[`$LUA -e '
+ -- return a version number in X.Y format
+ local _, _, ver = string.find(_VERSION, "^Lua (%d+%.%d+)")
+ print(ver)'`]
+ ])
+ 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], [script])
+ 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], [module])
+ 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 instead]])
+ 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 A minimal Lua factorial to prove this is an interpreter. This should work
+ dnl for Lua interpreters version 5.0 and beyond.
+ _ax_lua_factorial=[`$1 2>/dev/null -e '
+ -- a simple factorial
+ function fact (n)
+ if n == 0 then
+ return 1
+ else
+ return n * fact(n-1)
+ end
+ end
+ print("fact(5) is " .. fact(5))'`]
+ AS_IF([test "$_ax_lua_factorial" = 'fact(5) is 120'],
+ [$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],
+[
+ dnl Check that the Lua version is within the bounds. Only the major and minor
+ dnl version numbers are considered. This should work for Lua interpreters
+ dnl version 5.0 and beyond.
+ _ax_lua_good_version=[`$1 -e '
+ -- a script to compare versions
+ function verstr2num(verstr)
+ local _, _, majorver, minorver = string.find(verstr, "^(%d+)%.(%d+)")
+ if majorver and minorver then
+ return tonumber(majorver) * 100 + tonumber(minorver)
+ end
+ end
+ local minver = verstr2num("$2")
+ local _, _, trimver = string.find(_VERSION, "^Lua (.*)")
+ local ver = verstr2num(trimver)
+ local maxver = verstr2num("$3") or 1e9
+ if minver <= ver and ver < maxver then
+ print("yes")
+ else
+ print("no")
+ end'`]
+ AS_IF([test "x$_ax_lua_good_version" = "xyes"],
+ [$4], [$5])
+])
+
+
+dnl =========================================================================
+dnl _AX_LUA_FND_PRFX_PTH(PROG, PREFIX, SCRIPT-OR-MODULE-DIR)
+dnl =========================================================================
+AC_DEFUN([_AX_LUA_FND_PRFX_PTH],
+[
+ dnl Get the script or module directory by querying the Lua interpreter,
+ dnl filtering on the given prefix, and selecting the shallowest path. If no
+ dnl path is found matching the prefix, the result will be an empty string.
+ dnl The third argument determines the type of search, it can be 'script' or
+ dnl 'module'. Supplying 'script' will perform the search with package.path
+ dnl and LUA_PATH, and supplying 'module' will search with package.cpath and
+ dnl LUA_CPATH. This is done for compatibility with Lua 5.0.
+
+ ax_lua_prefixed_path=[`$1 -e '
+ -- get the path based on search type
+ local searchtype = "$3"
+ local paths = ""
+ if searchtype == "script" then
+ paths = (package and package.path) or LUA_PATH
+ elseif searchtype == "module" then
+ paths = (package and package.cpath) or LUA_CPATH
+ end
+ -- search for the prefix
+ local prefix = "'$2'"
+ local minpath = ""
+ local mindepth = 1e9
+ string.gsub(paths, "(@<:@^;@:>@+)",
+ function (path)
+ path = string.gsub(path, "%?.*$", "")
+ path = string.gsub(path, "/@<:@^/@:>@*$", "")
+ if string.find(path, prefix) then
+ local depth = string.len(string.gsub(path, "@<:@^/@:>@", ""))
+ if depth < mindepth then
+ minpath = path
+ mindepth = depth
+ end
+ end
+ end)
+ print(minpath)'`]
+])
+
+
+dnl =========================================================================
+dnl AX_LUA_HEADERS([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+dnl =========================================================================
+AC_DEFUN([AX_LUA_HEADERS],
+[
+ dnl Check for LUA_VERSION.
+ AC_MSG_CHECKING([if LUA_VERSION is defined])
+ AS_IF([test "x$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_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$ac_cv_header_lua_h" = 'xyes'],
+ [ dnl Make a program to print LUA_VERSION defined in the header.
+ dnl TODO It would be really nice if we could do this without compiling a
+ dnl program, then it would work when cross compiling. But I'm not sure how
+ dnl to do this reliably. For now, assume versions match when cross compiling.
+
+ AS_IF([test "x$cross_compiling" != 'xyes'],
+ [ AC_CACHE_CHECK([for Lua header version],
+ [ax_cv_lua_header_version],
+ [ _ax_lua_saved_cppflags=$CPPFLAGS
+ CPPFLAGS="$CPPFLAGS $LUA_INCLUDE"
+ AC_RUN_IFELSE(
+ [ AC_LANG_SOURCE([[
+#include <lua.h>
+#include <stdlib.h>
+#include <stdio.h>
+int main(int argc, char ** argv)
+{
+ if(argc > 1) printf("%s", LUA_VERSION);
+ exit(EXIT_SUCCESS);
+}
+]])
+ ],
+ [ ax_cv_lua_header_version=`./conftest$EXEEXT p | \
+ $SED -n "s|^Lua \(@<:@0-9@:>@\{1,\}\.@<:@0-9@:>@\{1,\}\).\{0,\}|\1|p"`
+ ],
+ [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$LUA_VERSION"],
+ [ AC_MSG_RESULT([yes])
+ ax_header_version_match='yes'
+ ],
+ [ AC_MSG_RESULT([no])
+ ax_header_version_match='no'
+ ])
+ ],
+ [ AC_MSG_WARN([cross compiling so assuming header version number matches])
+ ax_header_version_match='yes'
+ ])
+ ])
+
+ dnl Was LUA_INCLUDE specified?
+ AS_IF([test "x$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([[$0 is deprecated, please use AX_LUA_HEADERS instead]])
+])
+
+
+dnl =========================================================================
+dnl AX_LUA_LIBS([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+dnl =========================================================================
+AC_DEFUN([AX_LUA_LIBS],
+[
+ dnl TODO Should this macro also check various -L flags?
+
+ dnl Check for LUA_VERSION.
+ AC_MSG_CHECKING([if LUA_VERSION is defined])
+ AS_IF([test "x$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])
+])
projects / neomutt / commitdiff