I've made some simple changes to the cmake's project source code so it will insert header information in the compile_commands.json file too, (you obviously need to list the headers files in the CMakeLists.txt file, for example add_executable(project main.cpp test.cpp test.hpp)), but it doesn't seems like it will be accepted mainstream (you can see my bug report here bug report link maybe you can help me convince the cmake devs that there is people interested in this feature. Cmake-ide uses the compile_commands.json file to grab the project files compiler flags, but since this file doesn't show any information about the compiler flags of header files, we need to try finding it with some hacky way (like find a source file with the same name and using it's compiler flags), this works in simple projects, but in anything more complex, problems will arise.
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