[!HAVE_DECL_MEMCHR]: Declare memchr.

diff --git a/lib/strnlen.c b/lib/strnlen.c
index 89f8185..dd22db9 100644 (file)
--- a/lib/strnlen.c
+++ b/lib/strnlen.c
@@ -19,6 +19,13 @@
 
 #include <string.h>
 
+#ifndef HAVE_DECL_MEMCHR
+"this configure-time declaration test was not run"
+#endif
+#if !HAVE_DECL_MEMCHR
+char *memchr ();
+#endif
+
 #undef __strnlen
 #undef strnlen