CPack: Deprecate PackageMaker and OSXX11 generators
Xcode no longer distributes the PackageMaker tools. Add a deprecation warning when the generator is used.
The CPack OSXX11
generator has not had any updates since 2011 except as
part of sweeping maintenance changes. It also creates packages with a
OSXScriptLauncher
binary that has only ppc
and i386
architectures which
are not supported by Apple anymore. Furthermore, the generator is not
even mentioned in our documentation. Add a deprecation warning.
Fixes: #20235 (closed)