In clang's attempt to be GCC compatible it ignores, but does not fail on, unknown -W options. Configure then ends up added the option to WARNING_FLAGS, and the warning is then emitted for every file compiled.
>From config.log: configure:7388: checking whether clang accepts -Wno-override-init configure:7406: clang -c -g -O2 -Wno-override-init conftest.c >&5 clang: warning: unknown warning option '-Wno-override-init'; did you mean '-Wno-over-aligned'? warning: unknown warning option '-Wno-override-init'; did you mean '-Wno-over-aligned'? [-Wunknown-warning-option] 1 warning generated. configure:7406: $? = 0 With a quick search I didn't find a canonical way to test this in autoconf, although adding -Werror does change the return value to 1 in this case. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
