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AC_DEFUN([PDNS_WITH_LUA],[
AC_PROG_GREP()dnl Ensure we have grep
AC_MSG_CHECKING([which Lua implementation to use])
AC_ARG_WITH([lua],
[AS_HELP_STRING([--with-lua], [select Lua implementation @<:@default=auto@:>@])
], [
with_lua=$withval
], [
with_lua=auto
])
AS_IF([test "x$with_lua" = "xyes"], [
dnl --with-lua was passed, make it auto
with_lua=auto
])
AC_MSG_RESULT([$with_lua])
AS_IF([test "x$with_lua" = "xno"], [
AC_MSG_ERROR([--without-lua specified, but Lua is not optional])
])
LUAPC=""
luajit_min_version='2.0.2'
lua_min_version='5.1'
AS_IF([test "x$with_lua" != "xauto"], [
with_lua_version=${lua_min_version}
AS_IF([echo "x$with_lua" | ${GREP} 'jit' >/dev/null 2>&1], [with_lua_version=${luajit_min_version}])
PKG_CHECK_MODULES([LUA], $with_lua >= $with_lua_version, [
AC_DEFINE([HAVE_LUA], [1], [Define to 1 if you have Lua])
LUAPC=$with_lua
], [
AC_MSG_ERROR([Selected Lua ($with_lua) not found])
])
], [
PKG_CHECK_MODULES([LUA], [luajit >= ${luajit_min_version}], [
LUAPC=luajit
AC_DEFINE([HAVE_LUA], [1], [Define to 1 if you have Lua])
], [ : ])
AS_IF([test -z "$LUAPC"], [
found_lua=n
m4_foreach_w([luapc], [lua5.3 lua-5.3 lua53 lua5.2 lua-5.2 lua52 lua5.1 lua-5.1 lua51 lua], [
AS_IF([test "$found_lua" != "y"], [
PKG_CHECK_MODULES([LUA], [luapc >= ${lua_min_version}], [
AC_DEFINE([HAVE_LUA], [1], [Define to 1 if you have lua])
found_lua=y
LUAPC=luapc
], [ : ])
])
])
])
])
AS_IF([test -z "$LUAPC"], [
AC_MSG_ERROR([No Lua not found, but is mandatory])
])
AM_CONDITIONAL([LUA], [test -n "x$LUAPC"])
])
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