===================================================================
RCS file: /cvs/mandoc/test-strcasestr.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -p -r1.1 -r1.2
--- mandoc/test-strcasestr.c	2013/12/31 23:03:47	1.1
+++ mandoc/test-strcasestr.c	2014/08/05 16:03:03	1.2
@@ -1,3 +1,7 @@
+#if defined(__linux__) || defined(__MINT__)
+# define _GNU_SOURCE /* strcasestr() */
+#endif
+
 #include <string.h>
 
 int