fails in cmake 3.31

[phlptp]

The coverage methods fail in cmake 3.31 due to policy CMP0175

All add_custom_command calls like

add_custom_command(
    TARGET ${Coverage_NAME}
    POST_BUILD
    COMMAND ;
    COMMENT "Cobertura code coverage report saved in ${Coverage_NAME}.xml.")
endfunction() # setup_target_for_coverage_gcovr_xml

generate an error of the form
At least one COMMAND must be given.

These custom commands which seem to be for comment only should be integrated into the TARGET through separate commands or the comment made into a command.

[carlocorradini]

I've solved by faking the command:

add_custom_command(
    TARGET ${Coverage_NAME}
    POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E true # Always return 0
    COMMENT "Cobertura code coverage report saved in ${Coverage_NAME}.xml.")
endfunction() # setup_target_for_coverage_gcovr_xml