Note: some of these warnings are enabled by a combination of -Wunused (added earlier) and -Wextra. Cherry-picked from aomedia/master: 4790a69 Change-Id: I322a1366bd4fd6c0dec9e758c2d5e88e003b1cbf
Also, fix the warnings generated by this flag. Conflicts: examples/aom_cx_set_ref.c Change-Id: I0451e119c52000aa7c1c55027d53f1da5a02a11f
Change-Id: I60dd645451d6d65465f099a16ac855fb0b5a57a9