Installing headers the modern way, regurgitated and revisited

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Does @mherok’s reply still remain the best way to go about this?

In any case, I had to update his code a bit with CMake 3.26. Here’s what seems to work well:

cmake_minimum_required(VERSION 3.23...3.26)

# ...

target_sources(${PROJECT_NAME} PUBLIC
    FILE_SET public_headers
    TYPE HEADERS
    BASE_DIRS include
    FILES include/foobar.h)

include(GNUInstallDirs)
install(TARGETS ${PROJECT_NAME} FILE_SET public_headers)
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