Function barnacl_sys::crypto_sign_ed25519_detached

pub unsafe extern "C" fn crypto_sign_ed25519_detached(
    sig: *mut [u8; 64], 
    siglen: *mut c_ulonglong, 
    m: *const u8, 
    mlen: c_ulonglong, 
    sk: *const [u8; 64]
) -> c_int