"fake" flags cause non-gnu linkers to fail, and need a way to pass raw flags.
https://bugs.gentoo.org/369287
--- a/Makefile
+++ b/Makefile
@@ -54,3 +54,3 @@
 $(INTERMEDIATE)/%.o: $(IMG)/%.pbm
-	$(LD) -r -b binary -z noexecstack -z really_noexecstack -z pretty_please_noexecstack -o $@ $<
+	$(LD) -r -b binary -z noexecstack $(RAW_LDFLAGS) -o $@ $<