I want to build native compiler(gcc) for mips. not x86 native compiler.
(I have mips target board with harddisk.)

If you know about documents that related to it, Please let me know.
I can't find in google, too.

Is that what you are after ?

http://www.village.org/villagers/imp/build.html

Are you looking for that?:

http://www.cs.princeton.edu/software/lcc/

lcc - Default branch

About:
lcc is a retargetable compiler for ISO Standard C. It generates code for the ALPHA, SPARC, MIPS R3000, and Intel x86 and its successors. Despite the fact that any Linux system will already have gcc, there are reasons for installing lcc as well. lcc is small, compiles more quickly than gcc, and helps prevent some porting bugs. It also gives more useful error messages in some circumstances. This means that it is sensible to use lcc during development, and gcc for the final binary where you want the better optimization.

Greetinx

Pete