+# #if HAVE_... will evaluate to false for any non numeric string.
+# That would be flagged by using -Wundef, however gnulib currently
+# tests many undefined macros, and so we can't enable that option.
+# So at least preclude common boolean strings as macro values.
+sc_Wundef_boolean:
+ @grep -Ei '^#define.*(yes|no|true|false)$$' '$(CONFIG_INCLUDE)' && \
+ { echo 'Use 0 or 1 for macro values' 1>&2; exit 1; } || :
+
+sc_vulnerable_makefile_CVE-2009-4029:
+ @files=$$(find $(srcdir) -name Makefile.in); \
+ if test -n "$$files"; then \
+ grep -E \
+ 'perm -777 -exec chmod a\+rwx|chmod 777 \$$\(distdir\)' \
+ $$files && \
+ { echo '$(ME): the above files are vulnerable; beware of' \
+ 'running "make dist*" rules, and upgrade to fixed automake' \
+ 'see http://bugzilla.redhat.com/542609 for details' \
+ 1>&2; exit 1; } || :; \
+ else :; \
+ fi
+