Compiling with Xcode 7.3, it comes with an error.
ld: LTO remark: silk/decode_core.c:174:13: loop not vectorized: cannot prove it is safe to reorder memory operations Command /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ emitted errors but did not return a nonzero exit code to indicate failure