This[1] should catch undefined preprocessor expressions, i.e. instead of showing a warning if FOO_BAR_H is undefined: #if FOO_BAR_H
make the build fail with an error instead. This combined with using #cmakedefine01 (instead of #cmakedefine), could catch things like: https://invent.kde.org/pim/kdepim-runtime/-/commit/05a0e5bbfbb06ed6aa88640f25f563cf7e5b1330 [1]https://invent.kde.org/frameworks/extra-cmake-modules/-/commit/25bbb2a4776d36b542857709bb0448a7ea030b59 Regards Ahmad Samir
