cmake_minimum_required(VERSION 3.0)

project(ucore_user)
enable_language(ASM)

# Path
if (${ARCH} STREQUAL riscv32 OR ${ARCH} STREQUAL riscv64)
    set(ARCH_DIR src/arch/riscv)
else()
    set(ARCH_DIR src/arch/${ARCH})
endif()
aux_source_directory(src SRCS)
aux_source_directory(src/libs LIBS)
aux_source_directory(src/ulibs LIBS)
set(LIBS ${ARCH_DIR}/initcode.S ${LIBS})
include_directories(src/libs src/ulibs ${ARCH_DIR})
set(EXECUTABLE_OUTPUT_PATH ${ARCH})

# Toolchain
if (${ARCH} STREQUAL i386)
    if(APPLE)
        set(PREFIX          i386-elf-)
    endif ()
    set(CMAKE_C_FLAGS       "-m32")
elseif (${ARCH} STREQUAL x86_64)
    if(APPLE)
        set(PREFIX          x86_64-elf-)
    endif ()
    set(CMAKE_C_FLAGS       "-m64")
elseif (${ARCH} STREQUAL riscv32)
    set(PREFIX              riscv64-unknown-elf-)
    set(CMAKE_C_FLAGS       "-march=rv32imac -mabi=ilp32 -mcmodel=medany")
elseif (${ARCH} STREQUAL riscv64)
    set(PREFIX              riscv64-unknown-elf-)
    set(CMAKE_C_FLAGS       "-march=rv64imac -mabi=lp64 -mcmodel=medany")
elseif (${ARCH} STREQUAL aarch64)
    if(APPLE)
        set(PREFIX          aarch64-none-elf-)
    else()
        set(PREFIX          aarch64-elf-)
    endif ()
    set(CMAKE_C_FLAGS       "-mgeneral-regs-only")
    set(LINK_FLAGS          "-Ttext 0xffff000000000000")
else()
    message("Unsupported arch: ${ARCH}")
endif ()
set(CMAKE_ASM_COMPILER      ${PREFIX}gcc)
set(CMAKE_C_COMPILER        ${PREFIX}gcc)
set(CMAKE_RANLIB            ${PREFIX}ranlib)
set(CMAKE_C_FLAGS           "${CMAKE_C_FLAGS} -fno-builtin -nostdinc -fno-stack-protector -ggdb -Wall")
set(CMAKE_ASM_FLAGS         ${CMAKE_C_FLAGS})
set(CMAKE_C_LINK_FLAGS      "${LINK_FLAGS} -nostdlib")  # override default value to get rid of '-Wl,-search_paths_first -Wl,-headerpad_max_install_names'
set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS)                  # override default value to get rid of '-rdynamic' on Linux

# Library
add_library(ulib ${LIBS})

# Execuatble
foreach (PATH ${SRCS})
    get_filename_component(NAME ${PATH} NAME_WE)
    add_executable(${NAME} ${PATH})
    target_link_libraries(${NAME} ulib)
endforeach ()