check cc flags viability before setting them
diff --git a/skeletons/Makefile.am b/skeletons/Makefile.am
index 9bd8c43..33d5f81 100644
--- a/skeletons/Makefile.am
+++ b/skeletons/Makefile.am
@@ -12,7 +12,7 @@
 
 check_LTLIBRARIES = libasn1cskeletons.la
 
-libasn1cskeletons_la_CFLAGS = $(ADD_CFLAGS)
+libasn1cskeletons_la_CFLAGS = $(TESTSUITE_CFLAGS)
 libasn1cskeletons_la_SOURCES = 				\
 	ANY.c ANY.h					\
 	BIT_STRING.c BIT_STRING.h			\