cmake_minimum_required(VERSION "3.27")

project("kernel"
  DESCRIPTION "${TEACHOS_DESCRIPTION}"
  HOMEPAGE_URL "${TEACHOS_HOMEPAGE_URL}"
  VERSION "${TEACHOS_VERSION}"
  LANGUAGES ASM C CXX
)

#[============================================================================[
# Global Build System Configuration
#]============================================================================]

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/bin")
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/lib")
set(CMAKE_INTERPROCEDURAL_OPTIMIZATION YES)

#[============================================================================[
# Global Compiler Configuration
#]============================================================================]

add_compile_options(
  "$<$<CXX_COMPILER_ID:GNU>:-Wall>"
  "$<$<CXX_COMPILER_ID:GNU>:-Wextra>"
  "$<$<CXX_COMPILER_ID:GNU>:-Werror>"
  "$<$<CXX_COMPILER_ID:GNU>:-pedantic-errors>"
)

#[============================================================================[
# Global Directories
#]============================================================================]

include_directories(
  "include"
  "arch/${CMAKE_SYSTEM_PROCESSOR}/include"
)

#[============================================================================[
# The Bootstrap Library
#]============================================================================]

add_library("_boot" OBJECT)
add_library("teachos::boot" ALIAS "_boot")

#[============================================================================[
# The Video Library
#]============================================================================]

add_library("_video" OBJECT)
add_library("teachos::video" ALIAS "_video")

#[============================================================================[
# The Kernel
#]============================================================================]

add_executable("_kernel"
  "src/kernel/main.cpp"
)
add_executable("teachos::kernel" ALIAS "_kernel")

target_link_libraries("_kernel" PRIVATE
  "teachos::boot"
  "teachos::video"
)

#[============================================================================[
# Platform Specific Components
#]============================================================================]

add_subdirectory("arch/${CMAKE_SYSTEM_PROCESSOR}")