c++ - CMake dependency on defined (preprocessor) header file -


i have configuration file setup defines correct header files include components. later include file via preprocessor token. unfortunately cmake's dependency scanner ignores header file.

essentially comes down this:

#define header_file "somefile.h" #include header_file

cmake not add "somefile.h" list of dependencies source file!

how can cmake recognize dependency correctly?

(i know can #if 0 blocks , include files, either includes many dependencides other sources, or defeats whole purpose in first place -- depending on how it)

you can add explicit dependency source file setting object_depends property: 

set_property(source source.cpp append property object_depends "somefile.h")

you'll have source file includes configuration file.


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