How to use libclc ?

Hello, I am a student, studying PTX and OpenCL recently.
May I ask that how to use libclc ?
I run the script “”, but it will fault.

Used Command:
cd libclc
./ ./test/

Error Message:
fatal error: cannot open file ‘nvptx–nvidiacl/lib/builtins.bc’: No such file or directory
clang: error: unable to execute command: Segmentation fault

Environment Message:
OS: centOS 6.4 and Ubuntu 12.4
LLVM version: 3.4
libclc version: d9a654573ace0405ca1c7ef8d3dc2bdd43d8052f