cmake_minimum_required(VERSION 3.5)
# project(photon C ASM-ATT)

macro(subdirlist result curdir)
    file(GLOB children RELATIVE ${curdir} ${curdir}/*)
    set(dirlist "")
    foreach (child ${children})
        if (IS_DIRECTORY ${curdir}/${child})
            list(APPEND dirlist ${child})
        endif()
    endforeach()
    set(${result} ${dirlist})
endmacro()

include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/platform.cmake)
include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/Bundles.cmake)
platform_config(${PHOTON_TARGET})

message(STATUS "Target: ${machine}-${platform}")

include(${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/sys/${platform}/config.cmake)

set(CMAKE_EXE_LINKER_FLAGS
    "${CMAKE_EXE_LINKER_FLAGS} -ffreestanding -nostdlib -lgcc")

set(malloc_impl dlmalloc)
set(photon_libc_sources "")
set(generic_dirs string stdio stdlib errno internal ctype wchar)

message(STATUS "Memory allocator: ${malloc_impl}")

foreach (dir ${generic_dirs})
    file(GLOB dir_sources ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/${dir}/*.c)
    set(photon_libc_sources ${photon_libc_sources} ${dir_sources})
endforeach (dir)

file(GLOB malloc_sources
    ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/malloc/${malloc_impl}/*.c
    ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/malloc/${malloc_impl}/*.h)
file(GLOB_RECURSE photon_libc_headers ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/include/*.h)

file(GLOB photon_libc_crt
    ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/sys/${platform}/machine/${machine}/crt*.s)

add_library(crt OBJECT ${photon_libc_crt})
target_compile_options(crt PRIVATE -c -ffreestanding -nostdlib)

file(GLOB platform_sources
    ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/sys/${platform}/*.c
    ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/sys/${platform}/machine/${machine}/*.c
    ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/sys/${platform}/machine/${machine}/*.s)

foreach (platform_source_dir ${photon_platform_extra_source_dirs})
    file(GLOB dir_sources
        ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/sys/${platform}/${platform_source_dir}/*.c
        ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/sys/${platform}/${platform_source_dir}/*.h)
    set(platform_sources ${platform_sources} ${dir_sources})
endforeach (platform_source_dir)

foreach (platform_include_dir ${photon_platform_extra_include_dirs})
    file(GLOB dir_sources
        ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/sys/${platform}/${platform_include_dir}/*.h)
    set(platform_sources ${platform_sources} ${dir_sources})
endforeach (platform_include_dir)

foreach (crt_source ${photon_libc_crt})
    list(REMOVE_ITEM platform_sources ${crt_source})
endforeach (crt_source)

file(GLOB platform_headers
    ${CMAKE_CURRENT_SOURCE_DIR}/photon/sys/${platform}/*.h
    ${CMAKE_CURRENT_SOURCE_DIR}/photon/sys/${platform}/machine/${machine}/*.h)

set(photon_libc_sources ${photon_libc_sources} ${malloc_sources} ${platform_sources})
set(photon_libc_headers ${photon_libc_headers} ${platform_headers})

add_framework(Photon STATIC
    BUNDLE_ID net.doorstuck.photon
    SOURCES ${photon_libc_sources} ${photon_libc_headers}
    HEADERS ${CMAKE_CURRENT_BINARY_DIR}/sysroot/usr/include/*)

framework_compile_options(Photon -ffreestanding -nostdlib)
framework_link_libraries(Photon ${photon_platform_libs})
framework_link_frameworks(Photon ${photon_platform_frameworks})

framework_include_directories(Photon ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/include
    ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/sys/${platform}/
    ${CMAKE_CURRENT_BINARY_DIR}/sysroot/usr/include)

foreach (platform_include_dir ${photon_platform_extra_include_dirs})
    framework_include_directories(Photon
        ${CMAKE_CURRENT_SOURCE_DIR}/photon/libc/sys/${platform}/${platform_include_dir})
endforeach (platform_include_dir)

add_custom_target(local-root
    DEPENDS ${photon_libc_headers}
    COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/scripts/create-sysroot.sh
        ${CMAKE_CURRENT_SOURCE_DIR}
        ${CMAKE_CURRENT_BINARY_DIR}
        ${platform} ${machine})

framework_add_dependencies(Photon local-root crt)

add_custom_command(TARGET Photon POST_BUILD
    COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/scripts/add-framework-crt.sh
        ${CMAKE_CURRENT_BINARY_DIR}/Photon.framework
        ${CMAKE_CURRENT_BINARY_DIR})

if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
    framework_link_libraries(Photon gcc)
endif ()

if (TARGET early-sysroot)
    # We are being built as part of asbestOS, make sure the sysroot is there.
    framework_add_dependencies(Photon early-sysroot)
endif ()

if (PHOTON_TESTS EQUAL 1)
    add_subdirectory(tests)
endif ()