ｗｉｄｅｔｅｘｔ　ｉｎ　ｃ

ｉｓ　ｔｈｅｒｅ　ａ　ｇｏｏｄ　ｃ　ｃｏｍｐｉｌｅｒ　ｔｈａｔ　ａｃｃｅｐｔｓ　ｗｉｄｅｔｅｘｔ？　
ｉ　ｈａｖｅ　ａ　ｖｉｓｉｏｎ　ｉｍｐｅｄｉｍｅｎｔ　ａｎｄ　ｉ　ｃａｎ　ｓｅｅ　ｗｉｄｅｔｅｘｔ　ｂｅｔｔｅｒ．　
ｉｔ　ｗｏｕｌｄ　ｂｅ　ｎｉｃｅ　ｉｆ　ｙｏｕ　ｃｏｕｌｄ　ｐｏｉｎｔ　ｍｅ　ｔｏ　ａ　ｇｏｏｄ　ｏｎｅ　ｔｈａｔ　ｃａｎ　ａｃｃｏｍｏｄａｔｅ　ｍｅ．

I am pretty sure CXX only accepts ASCII. If you are asking about encoding libraries, here is one:
http://www.musl-libc.org/