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+2012-11-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Improve static checking of integer overflow and stack smashing.
+        * configure.ac (WARN_CFLAGS): Add -Wstack-protector and
+        -Wstrict-overflow if using GCC 4.7.2 or later on a platform with
+        at least 64-bit long int.  This improves static checking on these
+        platforms, when configured with --enable-gcc-warnings.
+
 2012-11-17  Paul Eggert  <eggert@cs.ucla.edu>
 
         Assume POSIX 1003.1-1988 or later for fcntl.h (Bug#12881).