mips16 help

[boy]

Hi all.
I want build a compiler which can support the flag '-mips16'.
I use egcs-1.1.2 to build a compiler. And I use this compiler with flag
'-mips16' to build a very simple program . Error happennd likes following:

/tmp/ccWq8B5n.s: Assembler messages:
/tmp/ccWq8B5n.s:16: Internal error!
Assertion failure in macro_build_lui at ../../../binutils-2.8.
1/gas/config/tc-mips.c line 2596.
Please report this bug.

Who can tell me how to build gcc whick supports the flag '-mips16' .

Many thanks.

ness