Using the OpenSSL Dependency for GDS Support

The GDS feature of Qt OPC UA requires the OpenSSL 1.1 headers and libraries.

If OpenSSL is not installed to a path that is searched by default, the location of the headers and libraries must be passed to the build process.

例如，若 OpenSSL 1.1 已安装到 /opt/openssl , the locations must be passed as follows:

-DOPENSSL_ROOT_DIR=/opt/openssl/
					

If GDS support is not required, it can be disabled by using the following parameters:

-DFEATURE_gds=OFF
					

在此情况下，不要求 OpenSSL。