Don't treat deprecation warnings as errors

[Thomas1664]

Especially on UWP builds fail because deprecation warnings are treated as errors by the compiler. What is the best way to disable this behaviour?

Example:

         D:\buildtrees\librabbitmq\src\v0.11.0-a3e68f5b2e.clean\librabbitmq\amqp_openssl.c(430,10): error C4996: 'ENGINE_load_private_key': Since OpenSSL 3.0 [D:\buildtrees\librabbitmq\arm-uwp-dbg\librabbitmq\rabbitmq.vcxproj]
         D:\buildtrees\librabbitmq\src\v0.11.0-a3e68f5b2e.clean\librabbitmq\amqp_openssl.c(470,9): error C4996: 'PEM_read_bio_RSAPrivateKey': Since OpenSSL 3.0 [D:\buildtrees\librabbitmq\arm-uwp-dbg\librabbitmq\rabbitmq.vcxproj]
         D:\buildtrees\librabbitmq\src\v0.11.0-a3e68f5b2e.clean\librabbitmq\amqp_openssl.c(474,12): error C4996: 'SSL_CTX_use_RSAPrivateKey': Since OpenSSL 3.0 [D:\buildtrees\librabbitmq\arm-uwp-dbg\librabbitmq\rabbitmq.vcxproj]
         D:\buildtrees\librabbitmq\src\v0.11.0-a3e68f5b2e.clean\librabbitmq\amqp_openssl.c(480,3): error C4996: 'RSA_free': Since OpenSSL 3.0 [D:\buildtrees\librabbitmq\arm-uwp-dbg\librabbitmq\rabbitmq.vcxproj]
         D:\buildtrees\librabbitmq\src\v0.11.0-a3e68f5b2e.clean\librabbitmq\amqp_openssl.c(684,5): error C4996: 'ENGINE_free': Since OpenSSL 3.0 [D:\buildtrees\librabbitmq\arm-uwp-dbg\librabbitmq\rabbitmq.vcxproj]
         D:\buildtrees\librabbitmq\src\v0.11.0-a3e68f5b2e.clean\librabbitmq\amqp_openssl.c(692,3): error C4996: 'ENGINE_load_builtin_engines': Since OpenSSL 3.0 [D:\buildtrees\librabbitmq\arm-uwp-dbg\librabbitmq\rabbitmq.vcxproj]
         D:\buildtrees\librabbitmq\src\v0.11.0-a3e68f5b2e.clean\librabbitmq\amqp_openssl.c(693,20): error C4996: 'ENGINE_by_id': Since OpenSSL 3.0 [D:\buildtrees\librabbitmq\arm-uwp-dbg\librabbitmq\rabbitmq.vcxproj]
         D:\buildtrees\librabbitmq\src\v0.11.0-a3e68f5b2e.clean\librabbitmq\amqp_openssl.c(699,7): error C4996: 'ENGINE_set_default': Since OpenSSL 3.0 [D:\buildtrees\librabbitmq\arm-uwp-dbg\librabbitmq\rabbitmq.vcxproj]
         D:\buildtrees\librabbitmq\src\v0.11.0-a3e68f5b2e.clean\librabbitmq\amqp_openssl.c(700,5): error C4996: 'ENGINE_free': Since OpenSSL 3.0 [D:\buildtrees\librabbitmq\arm-uwp-dbg\librabbitmq\rabbitmq.vcxproj]
         D:\buildtrees\librabbitmq\src\v0.11.0-a3e68f5b2e.clean\librabbitmq\amqp_openssl.c(776,5): error C4996: 'ENGINE_free': Since OpenSSL 3.0 [D:\buildtrees\librabbitmq\arm-uwp-dbg\librabbitmq\rabbitmq.vcxproj]

[Neumann-A]

Make sure /WX- is passed?

[Thomas1664]

I ended up adding /wd4996 to CMAKE_C_FLAGS/ CMAKE_CXX_FLAGS in CMakeLists.txt of a port via a patch