I'm on a Mac, using Clang (Apple LLVM version 9.0.0 (clang-900.0.38)) in the coreutils "library", the file `explicit_bzero.c`, the build stops because `asm` is not a valid keyword, i had to manually change it to `__asm` for the build to finish.
So you should either `#define` it somewhere, or change it to the valid syntax, `__asm`
