CMake command line for C++ #define

Question

I need to compile different versions of a certain project by adding compiler switches. Usually I would do this by using add_definitions or something like

set_p         


        

Answer 1

Container CMakeLists.txt solution

Tricky solution:

Your read only CMakeList.txt path: ${path}/ReadOnlyProject/CMakeLists.txt

Create a new CMakeList.txt to upper to the read only library (${path}/CMakeLists.txt):

CMAKE_MINIMUM_REQUIRED(VERSION 2.8.0)
PROJECT (FAKE_PROJECT)

ADD_DEFINITIONS(-D_MYDEFINE=1)

ADD_SUBDIRECTORY(ReadOnlyProject)

Now use your new project (FAKE_PROJECT) to compile. If the ReadOnlyProject does not set compilers definitions directly, it could work.

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On Visual Studio 2010:

Try to modify c:\Users\${username}\AppData\Local\Microsoft\MSBuild\v4.0\Microsoft.Cpp.Win32.user.props to add custom compiler settings.

You should add the followings:

  ...
  
    
      __MYDEFINE=1;%(PreprocessorDefinitions)