linux ubuntu create build system opencl not foung for AMDAPP

[masuch]

Hi,

I have tried to create build system for bullet 2.79 version but It says that:
OpenCL NOT found for nvidia and intel graphics card, which is correct.
I have amd graphic card hd 6990 (fglrx proprietary catalyst 11.8 properly installed) with AMDAPP opencl.
Does bullet support opencl for amd graphic cards ?
If so, what should I set up to detect opencl ?

thanks for any clue.
M.