Function posix_memalign 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn posix_memalign(
    memptr: *mut *mut c_void,
    alignment: size_t,
    size: size_t,
) -> c_int

See https://pubs.opengroup.org/onlinepubs/9799919799/functions/posix_memalign.html.