Gentoo's Bugzilla –
Attachment 395772 Details for
Bug 539210dev-lang/python-{2.7.8,2.7.9-r1} with sys-libs/musl - In file included from .../work/Python-2.7.9/Modules/python.c:11:0: /usr/include/sys/prctl.h:88:8: error: redefinition of ‘struct prctl_mm_map’