Function build_cpp 

pub fn build_cpp<B, SourcePath, SourcePathIter>(
    build: &mut Build,
    use_cuda_api: B,
    link_python: bool,
    cargo_commands: Option<&mut Vec<String>>,
    sources: SourcePathIter,
) -> Result<()>
where
    B: Into<Option<bool>>,
    SourcePath: AsRef<Path>,
    SourcePathIter: IntoIterator<Item = SourcePath>,

Construct the cc::Build to compile C++ source code.