The VS 6 IDE does not like spaces in definition values so CMake drops
them and warns. The Tests/CompileDefinitions test C code that looks for
the dropped definitions already knows to skip them, but CMake still
warns. Silence the warnings by avoiding such values in the first place
on VS 6.
They can't be used when evaluating link libraries, but they can be
used for include directories and compile definitions. Later they can
be used for compile options.
This generator expression joins a list with a separator. The separator
may contain arbitrary content, such as commas, which is ordinarily a
delimiter in the generator expression syntax.
Because the main file for the dummy-executable and the actual compile
test were both called main.cpp, they were overwriting each other during
in-source builds.
There is no need to do so. Be consistent with include directories and
ensure uniqueness.
This requires changing the API of the cmLocalGenerator::AppendDefines
method, and changing the generators to match.
The test unfortunately can't test for uniqueness, but it at least verifies
that nothing gets lost.
Stephen Kelly
Brad King