lua: detect if static or dynamic linking is wanted

configure.ac

@@ -110,6 +110,7 @@ PKG_CHECK_MODULES([LUA], [lua >= 5.2], echo "lua >= 5.2 found", [
 	PKG_CHECK_MODULES([LUA], [lua5.2 >= 5.2], echo "lua5.2 found", [
 		echo "=> lualib not found, assuming static lua in linker path..."
 		LUA_LIBS="-llua -ldl"
+		AC_DEFINE(STATIC_LUAPOSIX,1,[Define to 1 for static lua build.])
 	])
 ])
 

src/gui/luainstance.cpp

@@ -347,7 +347,7 @@ const luaL_Reg CLuaInstance::methods[] =
 	{ NULL, NULL }
 };
 
-#ifndef DYNAMIC_LUAPOSIX
+#ifdef STATIC_LUAPOSIX
 /* hack: we link against luaposix, which is included in our
  * custom built lualib */
 extern "C" { LUAMOD_API int (luaopen_posix_c) (lua_State *L); }
@@ -384,7 +384,7 @@ void CLuaInstance::registerFunctions()
 	luaopen_io(lua);
 	luaopen_string(lua);
 	luaopen_math(lua);
-#ifndef DYNAMIC_LUAPOSIX
+#ifdef STATIC_LUAPOSIX
 	luaopen_posix_c(lua);
 #else
 	dolibrary(lua,"posix");