cmake_minimum_required(VERSION 3.13)

if (NOT DEFINED ENV{DEVKITPRO})
    message(FATAL_ERROR "DEVKITPRO is not defined!")
endif()

if (NOT DEFINED CMAKE_TOOLCHAIN_FILE)
    if (EXISTS $ENV{DEVKITPRO}/cmake/Switch.cmake)
        set(CMAKE_TOOLCHAIN_FILE $ENV{DEVKITPRO}/cmake/Switch.cmake)
    else()
        message(FATAL_ERROR "please run 'sudo pacman -S switch-cmake`")
    endif()
endif()

project(sphaira LANGUAGES C CXX)

# enable setting cmake options via set()
set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)

# export compile commands
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

# enable LTO (only in release builds)
if (CMAKE_BUILD_TYPE STREQUAL "Release" OR CMAKE_BUILD_TYPE STREQUAL "MinSizeRel")
    include(CheckIPOSupported)
    check_ipo_supported(RESULT ipo_supported OUTPUT ipo_error)
    if (ipo_supported)
        message(STATUS "IPO / LTO enabled for ALL targets")
        cmake_policy(SET CMP0069 NEW)
        set(CMAKE_POLICY_DEFAULT_CMP0069 NEW)
        set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
    else()
        message(STATUS "IPO / LTO not supported: <${ipo_error}>")
    endif()
else()
    message(STATUS "IPO / LTO not enabled in debug build")
endif()

function(dkp_fatal_if_not_found var package)
    if (DEFINED ${var}_NOT_FOUND OR DEFINED ${var}-NOTFOUND)
        message(FATAL_ERROR "${package} not found, please run pacman -S switch-${package}")
    endif()
endfunction(dkp_fatal_if_not_found var package)

# disable exceptions and rtti in order to shrink final binary size.
add_compile_options(
  "$<$<COMPILE_LANGUAGE:C>:-fno-exceptions>"
  "$<$<COMPILE_LANGUAGE:CXX>:-fno-exceptions>"
  "$<$<COMPILE_LANGUAGE:CXX>:-fno-rtti>"
)

add_subdirectory(hbl)
add_subdirectory(sphaira)