cmake_minimum_required(VERSION 3.20)
project(fortuna LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 20)

  if(CMAKE_BUILD_TYPE MATCHES "Debug")
    # Produce debugging information in the operating system's native format.
    # Level 3 includes extra information, such as all the macro definitions
    # present in the program. Some debuggers support macro expansion when you
    # use -g3
    if(NOT CMAKE_CXX_FLAGS MATCHES "-g")
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g3")
    endif(NOT CMAKE_CXX_FLAGS MATCHES "-g")

    if(NOT $ENV{VALGRIND} MATCHES "true")
      # If DWARF debugging information is enabled, separate as much debugging
      # information as possible into a separate output file with the extension
      # .dwo. This option allows the build system to avoid linking files with
      # debug information.
      if(NOT CMAKE_CXX_FLAGS MATCHES "-gsplit-dwarf")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -gsplit-dwarf")
      endif(NOT CMAKE_CXX_FLAGS MATCHES "-gsplit-dwarf")
    else()
      message(STATUS "VALGRIND=true, not setting '-gsplit-dwarf'")
    endif(NOT $ENV{VALGRIND} MATCHES "true")

    if(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
    endif(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")

    if(NOT CMAKE_CXX_FLAGS MATCHES "-Wextra")
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wextra")
    endif(NOT CMAKE_CXX_FLAGS MATCHES "-Wextra")

    if(NOT CMAKE_CXX_FLAGS MATCHES "-Wpedantic")
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wpedantic")
    endif(NOT CMAKE_CXX_FLAGS MATCHES "-Wpedantic")

  endif(CMAKE_BUILD_TYPE MATCHES "Debug")

  if(CMAKE_BUILD_TYPE MATCHES "Release")
    if(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
    endif(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")

    # Optimize yet more.
    if(NOT CMAKE_CXX_FLAGS MATCHES "-O3")
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3")
    endif(NOT CMAKE_CXX_FLAGS MATCHES "-O3")

    if(NOT CMAKE_CXX_FLAGS MATCHES "-DNDEBUG")
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DNDEBUG")
    endif(NOT CMAKE_CXX_FLAGS MATCHES "-DNDEBUG")
  endif(CMAKE_BUILD_TYPE MATCHES "Release")

  message(STATUS "CMAKE_CXX_FLAGS: ${CMAKE_CXX_FLAGS}")

add_executable(fortuna main.cpp generator.cpp generator.h)