debug=

static VALUE
ossl_debug_set(VALUE self, VALUE val)
{
    VALUE old = dOSSL;
    dOSSL = val;

    if (old != dOSSL) {
        if (dOSSL == Qtrue) {
            CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
            fprintf(stderr, "OSSL_DEBUG: IS NOW ON!\n");
        } else if (old == Qtrue) {
            CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_OFF);
            fprintf(stderr, "OSSL_DEBUG: IS NOW OFF!\n");
        }
    }
    return val;
}