--- linux-gpib-4.0.3/language/Makefile.am.orig	2016-04-09 15:33:09.000000000 +0200
+++ linux-gpib-4.0.3/language/Makefile.am	2016-07-05 15:42:10.671996823 +0200
@@ -67,4 +67,4 @@
 	$(do_subst) < $(srcdir)/perl/Makefile.PL.in >perl/Makefile.PL
 
 perl/Makefile: perl/Makefile.PL
-	-(cd perl && $(PERL) Makefile.PL)
+	-(cd perl && $(PERL) Makefile.PL INSTALLDIRS=vendor CC="$(CC)" OPTIMIZE="$(CFLAGS)")