Better handling of CMake build configurations

# SPDX-License-Identifier: GPL-3.0-or-later                                    #

################################################################################

# ##############################################################################

# Configure CMake

# Define the CMake project and configure CMake

# ##############################################################################

# FetchContent_MakeAvailable() was introduced in 3.14

cmake_minimum_required(VERSION 3.14)

# Set default build type and also populate a list of available options

set(default_build_type "Release")

if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)

  message(STATUS "[hermes] Setting build type to '${default_build_type}' as none was specified.")

  set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE

      STRING "Choose the type of build." FORCE)

  # Set the possible values of build type for cmake-gui

  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS

    "Debug" "Release" "MinSizeRel" "RelWithDebInfo")

endif()

# ##############################################################################

# Define the CMake project

# ##############################################################################

project(

  scord

  VERSION 0.1.0

  LANGUAGES CXX

)

# Set default build type and also populate a list of available options

get_property(is_multi_config GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)

if(NOT is_multi_config)

  set(default_build_type "Release")

  set(allowed_build_types Debug Release MinSizeRel RelWithDebInfo)

  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "${allowed_build_types}")

  if(NOT CMAKE_BUILD_TYPE)

    set(CMAKE_BUILD_TYPE

        "${default_build_type}"

        CACHE STRING "Choose the type of build." FORCE

    )

  elseif(NOT CMAKE_BUILD_TYPE IN_LIST allowed_build_types)

    message(FATAL_ERROR "Unknown build type: ${CMAKE_BUILD_TYPE}")

  endif()

endif()

# make sure that debug versions for targets are used (if provided) in Debug mode

set_property(GLOBAL APPEND PROPERTY DEBUG_CONFIGURATIONS Debug)

set(CMAKE_CXX_STANDARD 17)

set(CMAKE_CXX_STANDARD_REQUIRED ON)