Enable -Wextra by default during compilation.

cc253798 · Tiago Peixoto · f74098a6 · cc253798
Commit cc253798 authored Feb 11, 2013 by Tiago Peixoto
--- a/configure.ac
+++ b/configure.ac
@@ -34,7 +34,7 @@ AC_PROG_INSTALL
 AC_CANONICAL_TARGET

 dnl turn on warnings
-[CXXFLAGS="${CXXFLAGS} -Wall"]
+[CXXFLAGS="${CXXFLAGS} -Wall -Wextra"]

 dnl Checks for options