dev-ruby/x25519: precomputed impl only works on amd64

The precomputed implementation only works on amd64, so avoid it
on other arches and let them fall back to the unoptimized reference
implementation.

Closes: https://bugs.gentoo.org/728420
Closes: https://bugs.gentoo.org/728888
Package-Manager: Portage-2.3.99, Repoman-2.3.22
Signed-off-by: Hans de Graaff <graaff@gentoo.org>

1 files changed, 14 insertions, 3 deletions

diff --git a/dev-ruby/x25519/x25519-1.0.8.ebuild b/dev-ruby/x25519/x25519-1.0.8.ebuild
index 36e65576f661..cd2b4a702e7f 100644
--- a/dev-ruby/x25519/x25519-1.0.8.ebuild
+++ b/dev-ruby/x25519/x25519-1.0.8.ebuild
@@ -26,16 +26,27 @@ all_ruby_prepare() {
 	sed -i -e '/bundler/ s:^:#: ; /coverall/I s:^:#:' spec/spec_helper.rb || die
 
 	sed -i -e 's/git ls-files -z/find . -print0/' ${RUBY_FAKEGEM_GEMSPEC} || die
+
+	# The precomputed implementation only works on amd64
+	if ! use amd64 ; then
+		sed -i -e '/\(x25519_precomputed\|X25519::Provider::Precomputed\)/ s:^:#:' lib/x25519.rb || die
+	fi
 }
 
 each_ruby_configure() {
-	${RUBY} -Cext/x25519_precomputed extconf.rb || die
+	if use amd64 ; then
+		${RUBY} -Cext/x25519_precomputed extconf.rb || die
+	fi
+
 	${RUBY} -Cext/x25519_ref10 extconf.rb || die
 }
 
 each_ruby_compile() {
-	emake V=1 -Cext/x25519_precomputed
-	cp ext/x25519_precomputed/x25519_precomputed.so lib/ || die
+	if use amd64 ; then
+		emake V=1 -Cext/x25519_precomputed
+		cp ext/x25519_precomputed/x25519_precomputed.so lib/ || die
+	fi
+
 	emake V=1 -Cext/x25519_ref10
 	cp ext/x25519_ref10/x25519_ref10.so lib/ || die
 }