I have successfully compiled and used sci-libs/scipy on my raspberry pi. To do it the following keywords changes were needed: =sci-libs/arpack-3.1.3-r1 ~arm =sci-libs/cblas-reference-20030223-r5 ** sci-libs/scipy ** virtual/cblas ** As usual use-flag for numpy: dev-python/numpy lapack And most important change to /etc/portage/profile/package.use.mask to actually unmask lapack keyword that is blocked by arm profile dev-python/numpy -lapack
It looks like on 22 Jul 2014 the keyword ~arm was added to sci-libs/scipy ebuilds. Also lapack use-flag for dev-python/numpy is not masked anymore in profile, and there is stable cblas implementation provided by sci-libs/gsl, so numpy[lapack] can be build without any ~arm keywords. Thus I close this bug with status resolved/fixed.