To generate the header file, we defined a custom command that executes the generate.py script and takes ${MAX_NUMBER} and the file path (${CMAKE_CURRENT_BINARY_DIR}/generated/primes.hpp) as arguments:
add_custom_command( OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/generated/primes.hpp COMMAND ${PYTHON_EXECUTABLE} generate.py ${MAX_NUMBER} ${CMAKE_CURRENT_BINARY_DIR}/generated/primes.hpp WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} DEPENDS generate.py )
In order to trigger the source code generation, we need to add it as a source code dependency in the definition of the executable, a task easily achieved with target_sources:
target_sources(example PRIVATE example.cpp ${CMAKE_CURRENT_BINARY_DIR}/generated/primes.hpp )
In the preceding ...
