macro_rules! expand_align {
    () => {
        s! {
            #[cfg_attr(any(target_pointer_width = "32",
                           target_arch = "x86_64",
                           target_arch = "powerpc64",
                           target_arch = "mips64",
                           target_arch = "s390x",
                           target_arch = "sparc64"),
                       repr(align(4)))]
            #[cfg_attr(not(any(target_pointer_width = "32",
                               target_arch = "x86_64",
                               target_arch = "powerpc64",
                               target_arch = "mips64",
                               target_arch = "s390x",
                               target_arch = "sparc64")),
                       repr(align(8)))]
            pub struct pthread_mutexattr_t {
                size: [u8; ::__SIZEOF_PTHREAD_MUTEXATTR_T],
            }

            #[repr(align(4))]
            pub struct pthread_condattr_t {
                size: [u8; ::__SIZEOF_PTHREAD_CONDATTR_T],
            }
        }
    };
}