dev-python/pyblake2: fix and keyword for *-macos, bug #634936

Package-Manager: Portage-2.3.11-prefix, Repoman-2.3.3

dev-python/pyblake2/pyblake2-0.9.3.ebuild

@@ -4,7 +4,7 @@
 EAPI=6
 
 PYTHON_COMPAT=( python{2_7,3_4,3_5,3_6} pypy )
-inherit distutils-r1
+inherit distutils-r1 flag-o-matic
 
 DESCRIPTION="BLAKE2 hash function extension module"
 HOMEPAGE="https://github.com/dchest/pyblake2 https://pypi.python.org/pypi/pyblake2"
@@ -12,7 +12,7 @@ SRC_URI="mirror://pypi/${PN::1}/${PN}/${P}.tar.gz"
 
 LICENSE="CC0-1.0"
 SLOT="0"
-KEYWORDS="~amd64 ~ia64 ~ppc ~ppc64 ~x86 ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+KEYWORDS="~amd64 ~ia64 ~ppc ~ppc64 ~x86 ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
 IUSE="cpu_flags_x86_ssse3 cpu_flags_x86_avx cpu_flags_x86_xop"
 
 python_prepare_all() {
@@ -26,6 +26,27 @@ python_prepare_all() {
 	# uncomment the implementation of choice
 	sed -i -e "/BLAKE2_COMPRESS_${impl}/s:^#::" setup.py || die
 
+	# avoid segfault due to over(?) optimisation
+	if [[ ${CHOST} == *86*-darwin* ]] ; then
+		local march=$(get-flag march)
+		# expand "native" into the used cpu optmisation
+		if [[ ${march} == native ]] ; then
+			# we're always on Clang here	
+			march=$(llc --version | grep "Host CPU:")
+			march=${march##*: }
+		fi
+		# compiling for haswell cpu results in a segfault when used
+		# with optimisation >O1, since optimisation here benefits more
+		# than cpu specific instructions, reduce to ivybridge level
+		case ${march} in
+			haswell|broadwell|skylake*)
+				local opt=$(get-flag -O)
+				[[ ${opt#-O} -gt 1 ]] && \
+					replace-flags -march=* -march=ivybridge
+				;;
+		esac
+	fi
+
 	distutils-r1_python_prepare_all
 }