If I fetch the bullet-2.80-revXXXX.zip file, it has an Extras/RigidBodyCpuPipeline directory and some integration into the CMake system.
If I fetch the svn tree from bullet.googlecode.com the is no such directory. Nor is there a source tag for version 2.80.
Are the only instances of the OpenCL code in the release zips? Are they in the source repository somewhere? Has the project moved to a new repository?
-- mb
P.S., questions on how to build the OpenCL stuff will be coming soon.
