Function openssl_sys::CRYPTO_get_ex_new_index
pub unsafe extern "C" fn CRYPTO_get_ex_new_index(class_index: c_int, argl: c_long, argp: *mut c_void, new_func: Option<CRYPTO_EX_new>, dup_func: Option<CRYPTO_EX_dup>, free_func: Option<CRYPTO_EX_free>) -> c_int
The portability is definied by:
#[cfg(any(ossl110, libressl))]