Constant openssl_sys::EVP_PKEY_OP_DECRYPT
pub const EVP_PKEY_OP_DECRYPT: c_int = _;
The portability is definied by:
#[cfg(all(not(any(ossl300))))]
pub const EVP_PKEY_OP_DECRYPT: c_int = _;
#[cfg(all(not(any(ossl300))))]