From cTuning.org
Here is a list of things that you might need to download from this site to enable Collective Optimization:
or extensions to MILEPOST GCC available through ICI SVN:
- CCC including milepost-gcc wrapper to extract program features, query database and predict good optimizations (beta version)
- CCC plugins (?)
- cBench dataset should be downloaded with SVN, as described in cBench itself (there are download scripts in CCC under apps/ccc-admin--get-cbench-*)
You can learn more about them from cTools