Constant openssl_sys::OPENSSL_INIT_NO_ATEXIT
pub const OPENSSL_INIT_NO_ATEXIT: u64 = 0x00080000;
The portability is definied by:
#[cfg(ossl111b)]
pub const OPENSSL_INIT_NO_ATEXIT: u64 = 0x00080000;
#[cfg(ossl111b)]