[CMake] How to properly add include directories?

[Fred Baksik]

On Mon, Oct 21, 2019, at 10:16 AM, David Aldrich wrote:
> Hi again,
> 
> My CMakeLists.txt file for my shared library contains:
> 
> add_library(MyLib SHARED my_source.cpp etc.)
> target_include_directories( MyLib PRIVATE ../MyHeaders)
> 
> The library builds ok, but there is no dependency on directory ../MyHeaders - touching a header file does not result in a re-compile of dependent source files.
> 
> There's a discussion here:
> 
> https://stackoverflow.com/questions/13703647/how-to-properly-add-include-directories-with-cmake 
> Opinion seems divided over whether or not it is necessary to add the header files to the list of source files for the target, e.g.:
> 
> set(SOURCES file.cpp file2.cpp ${YOUR_DIRECTORY}/file1.h ${YOUR_DIRECTORY}/file2.h)
> add_library(test ${SOURCES})
> 
> Please will you tell me what is the best practice?
> -- 
> 

What generator are you using?
That thread seems to contain a lot of misunderstandings about the issue.

If you are using the Makefile generator then refer to https://stackoverflow.com/questions/7461000/handling-header-files-dependencies-with-cmake. After building the project for the first time inspect the `depend.make files that are generated to verify if the headers are being picked up correctly as a dependency.`

`--`
`F`
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