guile: work around ppc builds crashing

[ci skip]

srcpkgs/guile/template

@@ -20,6 +20,13 @@ if [ "$CROSS_BUILD" ]; then
 	hostmakedepends+=" guile"
 fi
 
+pre_configure() {
+	# magically fixes https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941218
+	case "$XBPS_TARGET_MACHINE" in
+		ppc*) export CFLAGS+=" -Os";;
+	esac
+}
+
 libguile_package() {
 	short_desc+=" - runtime library"
 	pkg_install() {