Lightweight C++ preprocessor library.

1. Add this repository and SuperV1234/vrm_cmake as submodules of your project, as subfolders in your_project/extlibs/:

   git submodule add   https://github.com/SuperV1234/vrm_cmake.git   your_project/extlibs/vrm_cmake
   git submodule add   https://github.com/SuperV1234/vrm_pp.git      your_project/extlibs/vrm_pp

2. Include vrm_cmake in your project's CMakeLists.txt and look for the vrm_pp extlib:

   # Include `vrm_cmake`:
   list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/extlibs/vrm_cmake/cmake/")
   include(vrm_cmake)
   
   # Find `vrm_pp`:
   vrm_cmake_find_extlib(vrm_pp)