fix register lua funcs

core/src/xmake/prefix.h

@@ -117,14 +117,21 @@ static __tb_inline__ tb_pointer_t xm_lua_topointer(lua_State* lua, tb_int_t idx)
 static __tb_inline__ tb_void_t xm_lua_register(lua_State *lua, tb_char_t const* libname, luaL_Reg const* l)
 {
 #if LUA_VERSION_NUM >= 504
-    lua_getglobal(lua, libname);
-    if (lua_isnil(lua, -1))
+    if (libname)
     {
-        lua_pop(lua, 1);
-        lua_newtable(lua);
+        lua_getglobal(lua, libname);
+        if (lua_isnil(lua, -1))
+        {
+            lua_pop(lua, 1);
+            lua_newtable(lua);
+        }
+        luaL_setfuncs(lua, l, 0);
+        lua_setglobal(lua, libname);
+    }
+    else
+    {
+        luaL_setfuncs(lua, l, 0);
     }
-    luaL_setfuncs(lua, l, 0);
-    lua_setglobal(lua, libname);
 #else
     luaL_register(lua, libname, l);
 #endif

tests/projects/xmake_cli/xmake/src/main.c

@@ -1,6 +1,5 @@
 #include <xmake/xmake.h>
 
-tb_int_t main(tb_int_t argc, tb_char_t** argv)
-{
+tb_int_t main(tb_int_t argc, tb_char_t** argv) {
     return xm_engine_run("xmake", argc, argv, tb_null, tb_null);
 }