Set CPP=cpp in mk.conf and rebuild (sequentially): lang/f2c, devel/libtool-base, math/blas.
That did work. And math/py-numpy now compiles as well. Thanks for this thorough analysis.
-- Jörn Clausen joern.clausen%uni-bielefeld.de@localhost Hochschulrechenzentrum http://www.uni-bielefeld.de/hrz/ Universität Bielefeld