How to create a C++ GTK project with Cmake + Pkg-config

1. Create a project with CLion (Click C++ Executable)
2. Create your source code directory src
3. Create main.cpp and CMakeLists.txt in src

Content of src/main.cpp:

#include <gtkmm.h>

int main(int argc, char *argv[])
{
  auto app =
    Gtk::Application::create(argc, argv,
      "org.gtkmm.examples.base");

  Gtk::Window window;
  window.set_default_size(200, 200);

  return app->run(window);
}

Content of src/CMakeLists.txt:

set(SOURCE_FILES main.cpp)
link_directories(${GTKMM_LIBRARY_DIRS})
include_directories(${GTKMM_INCLUDE_DIRS})
add_executable(example main.cpp)
target_link_libraries(example ${GTKMM_LIBRARIES})

Content of CMakeLists.txt (be careful, it is the outer most CMakeLists.txt):

cmake_minimum_required(VERSION 3.8)
project(example)
set(CMAKE_CXX_STANDARD 11)
find_package(PkgConfig)
pkg_check_modules(GTKMM gtkmm-3.0)
add_subdirectory(src)

4. Select the outer CMakeLists.txt, then click the green arrow icon to rebuild the lib symbols.
5. Select main.cpp to compile your program, done.

Project Structure (Simpify)

➜  example tree
.
├── cmake-build-debug  <---- cmake generated stuffs (usually no need to worry about it)
├── CMakeLists.txt     <---- outer CMakeLists.txt
└── src                <---- source code directory
    ├── CMakeLists.txt
    └── main.cpp

Reference