[CMake] Including a header file fails

[Enrique Izaguirre]

Hello,

I am trying to include a windows header file in my build.
The simplest way I found is to add the following in the main CMakeLists.txt
file:

include_directories ("${MYPRJ_SOURCE_DIR}/../../../usr/include/w32api")
add_library (w32api w32api/winbase.h)

add_executable (myprj ${hostFiles})
target_link_libraries (myprj w32api)


I am working in Cygwin, and my project is in /home/<my-user>/myprj, that's
why I am using

 ${MYPRJ_SOURCE_DIR}/../../../usr/include/w32api

since "/" is the root in my cygwin system and the file I want is in
/usr/include/w32api

but when running cmake I get the following error:

CMake Error in CMakeLists.txt:
  Cannot find source file "winbase.h".  Tried extensions .c .C .c++ .cc .cpp
  .cxx .m .M .mm .h .hh .h++ .hm .hpp .hxx .in .txx

I have not been able to find out what is going on. Could you help please?

Best Regards

Enrique
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