+2013-09-23 Jan Djärv <jan.h.d@swipnet.se>
+
+ * configure.ac: With clang, check for and use -Wno-switch,
+ -Wno-tautological-constant-out-of-range-compare and -Wno-pointer-sign.
+
2013-09-23 Daniel Colascione <dancol@dancol.org>
* configure.ac: Check for valgrind headers.