🔧 [CMake] boost.ut alias

[krzysztof-jusiak]

Problem:

• boost.ut and ut are used by users but only ut is exposed.

Solution:

• Add boost.ut alias for ut.

[claremacrae]

Thanks for looking in to this.

I think this would fix builds for people who link against the boost.ut, and don't change any options in that target.

However, I found that when I made boost.ut be an alias, my code like this till failed - with an error that it wasn't legal to set up target_compile_options for an alias.:

if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
    # Turn off some checks off for boost.ut
    target_compile_options(boost.ut INTERFACE
            -Wno-c99-extensions # Needed for Boost.ut, at least in v1.1.6
            -Wno-documentation-unknown-command # unknown command tag name \userguide
            -Wno-weak-vtables
            -Wno-comma # See https://github.com/boost-ext/ut/issues/398
            )
endif()

So for maximum backward compatibility, I think the original target name of boost.ut would need to be retained.

[krzysztof-jusiak]

Closing for now