On my machine with OpenSSL 1.1.0, Tor's `configure` script fails to detect OpenSSL and gives me the following error: ``` configure: Now, we'll look for OpenSSL >= 1.0.1 checking for openssl directory... configure: WARNING: Could not find a linkable openssl. If you have it installed somewhere unusual, you can specify an explicit path using --with-openssl-dir configure: error: Missing libraries; unable to proceed. ``` This seems to be due to the fact that `configure` checks for OpenSSL >= 1.0.1 with `TLSv1_1_method()`, which is deprecated in favor of `TLS_method()` in OpenSSL 1.1.0. On my configuration of OpenSSL 1.1.0, deprecated functions are not available by default (not without first enabling the `OPENSSL_API_COMPAT` compatibility #define), hence the failure. I'd gladly provide a patch, but I'm not sure how this would best be fixed: explicitly check for `TLS_method()` in case the check for `TLSv1_1_method()` fails? Replace this test with a test on `OPENSSL_VERSION_NUMBER`? Find some other function introduced in 1.0.1 and neither removed nor deprecated in 1.1.0? **Trac**: **Username**: laomaiweng