Error with Clang block

Hi everybody,

I try tu use the Clang block from the GRAS package but when I lauch my
flow
graph, I can read this error.
Would you have any idea about what is wrong ?

Thank You
MChti

Executing: “/home/winston/Documents/gnuradio/test/top_block.py”

GRAS: The debug asserts are enabled. <<<
Created default thread pool with 2 threads.
GRAS compiler: compile source into bitcode…
-emit-llvm -c -x c++ /tmp/filebDt8bS -o /tmp/fileFF1fbT -O3
-I/usr/local/include
sh: 1: -emit-llvm: not found
Traceback (most recent call last):
File “/home/winston/Documents/gnuradio/test/top_block.py”, line 61, in

tb = top_block()
File “/home/winston/Documents/gnuradio/test/top_block.py”, line 35, in
init

gras.jit_factory(open("/home/winston/Documents/gnuradio/test/test2.cpp").read(),
["-O3"])
File “/usr/local/lib/python2.7/dist-packages/gras/GRAS_Factory.py”,
line
190, in py_jit_factory
jit_factory(*args)
RuntimeError: GRAS compiler: error system exec clang
Done