Bill Hoffman wrote:
You can do it by changing the CMakeCache.txt file, but it won't work in
the general case. You should put them in separate directories: build-32
and build-64.
You can build both 32 and 64 from the same SOURCE tree, just not the
same build tree.
build32 (cmake ../src -G"Visual Studio 10 2010")
build64 (cmake ../src -G"Visual Studio 10 2010 Win64")
You seem to be trying to reuse the same build tree for different builds
which is not a supported use case. I think if you stopped doing that
your life might get easier when working with CMake projects.
You can do both in the same solution/projects with the Microsoft fork of CMake,
but it's not a general solution, and it doesn't handle different settings for
32 bit and 64 bit. Because of that, they're "not pushing too hard" for it to
be in mainline CMake.
https://cmake.org/pipermail/cmake/2015-August/061346.html
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