static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr);
static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp);
-static BIO_METHOD bio_meth_zlib = {
+static const BIO_METHOD bio_meth_zlib = {
BIO_TYPE_COMP,
"zlib",
bio_zlib_write,
bio_zlib_callback_ctrl
};
-BIO_METHOD *BIO_f_zlib(void)
+const BIO_METHOD *BIO_f_zlib(void)
{
return &bio_meth_zlib;
}