llvm-gcc: invalid bitcode signature

ubuntu 11.10

llvm and llvm-gcc have been installed by ubuntu package ( apt-get install llvm llvm-gcc ). 

llvm-2.8 or llvm-2.9 and llvm-gcc-4.5 were tested.

llvm-gcc hello.c -> ok.

llvm -gcc -O3 -emit-llvm hello.c -c -o hello.b-> ok

but

lli hello.bc -> error : invalid bitcode signature 

In googling, I found below, but it was not useful.

https://bugs.launchpad.net/ubuntu/+source/dragonegg/+bug/712199

There are two solution.

1. build all of things on your PC not packages, llvm and llvm-gcc. 

2. using llvm-clang , I chosen this option. 

apt-get insatll llvm-clang

llvm-clang ........ -> it's still ok !.