configure: check for luaL_register in liblua
This is a temporary workaround for a missing compatibility API on
Debian-like systems (and anyone else who doesn't compile with
LUA_COMPAT_MODULE). Ignore any such libraries so we don't fail
confusingly later.
@@ -12,20 +12,51 @@ AC_DEFUN([CHECK_LUA_PATH], [dnl
AC_MSG_CHECKING([for lua.h in $1/$2])
if test -f $1/$2/lua.h; then
AC_MSG_RESULT([yes])
+
save_CFLAGS=$CFLAGS
save_LDFLAGS=$LDFLAGS
+ save_LIBS=$LIBS
+
CFLAGS="$CFLAGS"
LDFLAGS="-L$1/$3 $LDFLAGS $lib_m"
+
AC_CHECK_LIB($4, luaL_newstate, [
+ dnl mod_lua relies on some compatibility APIs to function.
+ AC_MSG_CHECKING([for luaL_register in -l$4])
+ CFLAGS="$CFLAGS -I$1/$2"
+ LIBS="-l$4"
+ AC_LINK_IFELSE([
+ AC_LANG_PROGRAM([[
+ #define LUA_COMPAT_ALL
+ #define LUA_COMPAT_5_2
+ #define LUA_COMPAT_5_1
+ #define LUA_COMPAT_MODULE
+
+ #include <lua.h>
+ #include <lauxlib.h>
+ ]], [[
+ /* This isn't a valid call, but we're testing linkability */
+ luaL_register(NULL, NULL, NULL);
+ ]])
+ ], [
+ AC_MSG_RESULT([yes])
LUA_LIBS="-L$1/$3 -l$4 $lib_m"
if test "x$ap_platform_runtime_link_flag" != "x"; then
APR_ADDTO(LUA_LIBS, [$ap_platform_runtime_link_flag$1/$3])
fi
LUA_CFLAGS="-I$1/$2"
+ ], [
+ AC_MSG_RESULT([no])
+ ])
])
+
CFLAGS=$save_CFLAGS
LDFLAGS=$save_LDFLAGS
+ LIBS=$save_LIBS
+
+ if test -n "${LUA_LIBS}"; then
break
+ fi
else
AC_MSG_RESULT([no])
fi
