Restructure CMakeLists.txt to be suitable for CPM.cmake #111
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Don't include tests and installation logic when for example CMake Package Manager (CPM.cmake) is used to add the project as a subdirectory.
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First of all, thanks for making this library!
I'm using CMake Package Manager (CPM.cmake) to add libraries like this one to CMake projects. CPM.cmake makes adding external libraries easy when the library has a CMake build system that works
well when added as a subdirectory.
This pull request makes a minor change to the CMake build system so that tests and installation logic are not included when the project is not the root project (i.e. added using
add_subdirectory). The advantage of doing this is that projects using this library will not accidentally build and run tests or install files defined by this project.I'm open to feedback if this doesn't work well with existing CMake workflows.