[ 17%] Built target LibBulletCollision
[ 21%] Built target LibBulletDynamics
[ 21%] Built target LibLinearMath
[ 24%] Built target LibOpenGLSupport
[ 24%] Built target CcdPhysicsDemo
[ 25%] Built target ConstraintDemo
[ 25%] Built target GenericJointDemo
[ 25%] Built target RagdollDemo
[ 26%] Built target BasicDemo
[ 26%] Built target BspPhysicsDemo
[ 28%] Built target LibGIMPACT
[ 29%] Built target MovingConcaveDemo
[ 29%] Built target VehicleDemo
[ 85%] Built target LibColladaDom
[ 99%] Built target LibXML
[100%] Built target ColladaDemo
[100%] Built target UserCollisionAlgorithm
It seems cmake builds fine for you, the demos and libraries are ok.
Bullet isn't designed for a system-wide install. I recommend to simply copy and paste the files you need into your project. However Bullet provides also jam build support, which appears to provide 'install' functionality.
Do you want to help adding 'install' support through cmake? I'm happy to accept such contribution.
Thanks,
Erwin