void ERR_add_error_txt(const char *sep, const char *txt);
void ERR_add_error_mem_bio(const char *sep, BIO *bio);
-Deprecated since OpenSSL 3.0:
+The following function has been deprecated since OpenSSL 3.0, and can be
+hidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value,
+see L<openssl_user_macros(7)>:
void ERR_put_error(int lib, int func, int reason, const char *file, int line);