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diff --git a/xmake/core/base/utf8.lua b/xmake/core/base/utf8.lua
new file mode 100644
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+++ b/xmake/core/base/utf8.lua
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+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+-- Copyright (C) 2015-present, Xmake Open Source Community.
+--
+-- @author      ruki
+-- @file        utf8.lua
+
+-- define module: utf8
+local utf8 = utf8 or {}
+
+-- @desc        The utf8 module
+--              It provides basic support for UTF-8 encoding.
+--              It is compatible with Lua 5.3+ utf8 library.
+--
+-- @interface   utf8.len(s [, i [, j [, lax]]])
+-- @interface   utf8.char(...)
+-- @interface   utf8.codepoint(s [, i [, j]])
+-- @interface   utf8.offset(s, n [, i])
+-- @interface   utf8.codes(s [, lax])
+-- @interface   utf8.sub(s, i [, j])
+-- @interface   utf8.reverse(s)
+-- @interface   utf8.lastof(s, pattern [, plain])
+-- @interface   utf8.find(s, pattern [, init [, plain]])
+-- @interface   utf8.width(s)
+-- @interface   utf8.byte(s [, i [, j]])
+--
+
+-- the char pattern
+if not utf8.charpattern then
+    utf8.charpattern = "[\0-\x7F\xC2-\xFD][\x80-\xBF]*"
+end
+
+-- return module: utf8
+return utf8