CONSOLE: Handle unimplemented features for console toolchains.

src/lib_os.c

@@ -47,7 +47,11 @@ static int os_pushresult(lua_State *L, int i, const char *filename)
 
 LJLIB_CF(os_execute)
 {
+#if LJ_TARGET_CONSOLE
+  lua_pushinteger(L, -1);
+#else
   lua_pushinteger(L, system(luaL_optstring(L, 1, NULL)));
+#endif
   return 1;
 }
 
@@ -86,7 +90,11 @@ LJLIB_CF(os_tmpname)
 
 LJLIB_CF(os_getenv)
 {
+#if LJ_TARGET_CONSOLE
+  lua_pushnil(L);
+#else
   lua_pushstring(L, getenv(luaL_checkstring(L, 1)));  /* if NULL push nil */
+#endif
   return 1;
 }