d06db7ebe8
Process all arguments in a single loop using a simple state machine. While at it, fix some error message typos. Also allow LINK_LIBRARIES with no actual libraries to disable use of the -DLINK_LIBRARIES=... from the CMAKE_FLAGS. This was already possible in the old logic if LINK_LIBRARIES was immediately followed by another keyword argument instead of the end of the argument list, so allow it in general. Update the RunCMake.try_compile test cases accordingly.
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