Turn on -Werror for travis CI builds

scripts/gen_travis.py

@@ -72,7 +72,9 @@ for unusual_combination in unusual_combinations_to_test:
     if os == 'osx' and '--enable-prof' in configure_flags:
         continue
 
-    env_string = '{} COMPILER_FLAGS="{}" CONFIGURE_FLAGS="{}"'.format(
+    # We get some spurious errors when -Warray-bounds is enabled.
+    env_string = ('{} COMPILER_FLAGS="{}" CONFIGURE_FLAGS="{}" '
+	'EXTRA_CFLAGS="-Werror -Wno-array-bounds"').format(
         compilers, " ".join(compiler_flags), " ".join(configure_flags))
 
     include_rows += '    - os: %s\n' % os