- `CURL_USE_LIBSSH`: Use libssh. Default: `OFF`
- `CURL_USE_LIBUV`: Use libuv for event-based tests. Default: `OFF`
- `CURL_USE_MBEDTLS`: Enable mbedTLS for SSL/TLS. Default: `OFF`
-- `CURL_USE_OPENSSL`: Enable OpenSSL for SSL/TLS. Default: `ON` if not other TLS backend was enabled
-- `CURL_USE_PKGCONFIG`: Enable `pkg-config` to detect dependencies. Default: `ON` for Unix, vcpkg, MinGW if not cross-compiling
+- `CURL_USE_OPENSSL`: Enable OpenSSL for SSL/TLS. Default: `ON` if no other TLS backend was enabled.
+- `CURL_USE_PKGCONFIG`: Enable `pkg-config` to detect dependencies. Default: `ON` for Unix, vcpkg, MinGW if not cross-compiling.
- `CURL_USE_RUSTLS`: Enable Rustls for SSL/TLS. Default: `OFF`
- `CURL_USE_SCHANNEL`: Enable Windows native SSL/TLS (Schannel). Default: `OFF`
- `CURL_USE_SECTRANSP`: Enable Apple OS native SSL/TLS (Secure Transport). Default: `OFF`