@ahmadia @smattis  @timothypovich , this OS X 10.6 fix probably needs to go into master, but I'm not sure how to do it. I think we could do something like

PROTEUS_BLAS_H = r'"cblas.h"'
if os.getenv('OSX_DEPLOYMENT_TARGET' == '10.6'):
    PROTEUS_ BLAS_H=r'"vecLib/cblas.h"'

etc.