3 
myproject/
  lib/
  src/
  project2/
    **CMakeLists.txt**
    test.cpp

I wrote CMakeLists.txt for compile 'test.cpp' file. I'd like to include /src because i should access src's file.

How could i include src file above? I tried like set(MORE_INCLUDE_DIR "-I${CMAKE_SOURCE_DIR}../../ but it's not working.

I should compile 'test.cpp' seperately please somebody help me.

Thanks in advance!

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6
  • What's MORE_INCLUDE_DIR? You should call include_directories or target_include_directories. Commented May 23, 2018 at 7:36
  • sorry for abstract comments. MORE_INCLUDE_DIR used for set include_directories. Could i set include_directories at parent directory based on CMAKE_SOURCE DIRECTORY? Commented May 23, 2018 at 7:45
  • Instead of ${CMAKE_SOURCE_DIR}../../ you probably mean ${CMAKE_SOURCE_DIR}/../. BTW, using message() command you may print value of any variable, and check its value. Commented May 23, 2018 at 7:55
  • @Tsyvarev thank you for comment:) I already modified it and it couldn't find path. In this case, Am i wrong at other part? Commented May 23, 2018 at 8:03
  • It is difficult to say where you are wrong, because you show neither the code (CMakeLists.txt), which sets include directory, nor exact error message. According to explicit setting of -I option, it seems that you misunderstand CMake concepts. But again, without the code we can only guess. Commented May 23, 2018 at 8:07

1 Answer 1

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8

In this case, cmake required absolute path not relative. Let's try call include_directories like this:

    get_filename_component(PARENT_DIR ../ ABSOLUTE)
    include_directories(${PARENT_DIR}/src)

It can help.

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2 Comments

In this example, how would your actual code properly include files from the src directory? I have a root folder, then in that root folder I have a "src" and a "test" dir. I'm writing a CMakeLists.txt that's in my "test" folder, but I want to include files from "src". If I add those 2 lines to the CMake file, but from within my test code I want to include a header from "src", how would I do it, if I can't put a ".." in the include path.
@RaleighL. Horrendous, isn't it? I'm sat here aghast at CMake's impenetrable mass of versions and weird syntaxes,

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