how to deal with -fno-tree-vectorize, -Wunused-but-set-variable and b_mode warnings?

hello guys

i am trying to port avconv with x264 + libvpx to javascript via clang and emscripten!

but i see some warnings clang is producing, see gist:
https://gist.github.com/binarykitchen/5230096

they are -fno-tree-vectorize, -Wunused-but-set-variable and b_mode warnings. can anyone of you help me here and give me some clues? i believe these come from clang and not from emscripten. probably i have to adjust some configure parameters?

thanks for any hints,
michael :slight_smile: