Make use of devel/gas on aarch64.
Index: Makefile
===================================================================
RCS file: /cvs/ports/multimedia/xine-lib/Makefile,v
retrieving revision 1.139
diff -u -p -r1.139 Makefile
--- Makefile 24 Oct 2018 14:28:08 -0000 1.139
+++ Makefile 26 Dec 2018 11:53:39 -0000
@@ -86,6 +86,11 @@ CONFIGURE_ENV= CPPFLAGS="-I${X11BASE}/in
LDFLAGS="-L${X11BASE}/lib -L${LOCALBASE}/lib" \
ac_cv_header_execinfo_h=no
+.if ${MACHINE_ARCH} == "aarch64"
+BUILD_DEPENDS+= devel/gas
+CONFIGURE_ENV+= AS="${LOCALBASE}/bin/gas"
+.endif
+
NO_TEST= Yes
pre-configure: