Hi! I'm pretty new to cmake and I came across a question which I could not find any information about in the official documentation or blog posts.
When adding a target through add_library / add_executable - should the header files of the target also be listed? The question also applies to target_sources I guess. On one hand - as far as I can tell it compiles perfectly fine without doing so, and the implicit dependency is also recognized (e.g if the header changes - the target will be recompiled) In addition most of the online examples do not list headers. On the other hand - it seems wrong not to list them. They ARE part of the target, even if they do not passed to the compiler directly. I can also assume that some IDEs will want to know about the existence of these headers and their relationship with the target. So what is the correct answer? should header files be listed as part of the target? Another question - how does cmake know to create the dependency between the target and the header file, even when it is not listed explicitly?
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