Modernize cmake project files #198
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Update most packages used
With CMake 3.23 or later, a more powerful, more convenient way of handling headers is to use file sets. A file set can associate headers with a target, and the headers can be installed along with the target in an install(TARGETS) call. No separate install(FILES) or install(DIRECTORY) call is needed. In addition, a file set provides information about whether a header is private or public, and also about the header search paths a consumer of the target must use.
Use
FILE_SET HEADERS
andCMAKE_VERIFY_INTERFACE_HEADER_SETS
see too TheLartians/PackageProject.cmake#32
and TheLartians/PackageProject.cmake#31