sys-libs/glibc-2.19 has regression in cos(), which causes test failures in sci-libs/scipy. https://github.com/scipy/scipy/issues/3604 https://sourceware.org/bugzilla/show_bug.cgi?id=16623 https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=ffe768a90912f9bce43b70a82576b3dc99e3121c Please backport this fix.
*** Bug 510754 has been marked as a duplicate of this bug. ***
fix is in glibc-2.19-r1 now http://sources.gentoo.org/gentoo/src/patchsets/glibc/2.19/00_all_0014-Fix-sign-of-input-to-bsloww1-BZ-16623.patch?rev=1.1