Karina
96 lines
3.1 KiB
CMake
96 lines
3.1 KiB
CMake
cmake_minimum_required(VERSION 3.10)
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project(ksOSKernel LANGUAGES ASM C)
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# --- Locate Swift toolchain with Embedded Swift stdlib ---
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# Priority: cmake var > env var > auto-detect
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if(NOT SWIFT_TOOLCHAIN AND DEFINED ENV{SWIFT_TOOLCHAIN})
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set(SWIFT_TOOLCHAIN "$ENV{SWIFT_TOOLCHAIN}")
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endif()
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if(SWIFT_TOOLCHAIN)
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set(SWIFTC "${SWIFT_TOOLCHAIN}/usr/bin/swiftc")
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set(SWIFT_RESOURCE_DIR "${SWIFT_TOOLCHAIN}/usr/lib/swift")
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elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin")
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# Scan for a swift.org toolchain that ships the embedded stdlib.
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# APPLE is false here (target is Generic), so we check the HOST OS.
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file(GLOB _tc_candidates
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"$ENV{HOME}/Library/Developer/Toolchains/*.xctoolchain"
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"/Library/Developer/Toolchains/*.xctoolchain"
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)
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foreach(_tc ${_tc_candidates})
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if(EXISTS "${_tc}/usr/lib/swift/embedded")
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set(SWIFTC "${_tc}/usr/bin/swiftc")
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set(SWIFT_RESOURCE_DIR "${_tc}/usr/lib/swift")
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break()
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endif()
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endforeach()
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else()
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# Linux: find swiftc in PATH
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find_program(_SWIFTC_EXE swiftc)
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if(_SWIFTC_EXE)
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get_filename_component(_SWIFTC_BIN "${_SWIFTC_EXE}" DIRECTORY)
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get_filename_component(_SWIFTC_USR "${_SWIFTC_BIN}" DIRECTORY)
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if(EXISTS "${_SWIFTC_USR}/lib/swift/embedded")
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set(SWIFTC "${_SWIFTC_EXE}")
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set(SWIFT_RESOURCE_DIR "${_SWIFTC_USR}/lib/swift")
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elseif(EXISTS "${_SWIFTC_USR}/lib/swift/lib/swift/embedded")
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set(SWIFTC "${_SWIFTC_EXE}")
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set(SWIFT_RESOURCE_DIR "${_SWIFTC_USR}/lib/swift/lib/swift")
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endif()
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endif()
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endif()
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if(NOT SWIFTC OR NOT EXISTS "${SWIFT_RESOURCE_DIR}/embedded")
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message(FATAL_ERROR
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"Swift toolchain with Embedded Swift not found.\n"
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"Install a swift.org toolchain and pass -DSWIFT_TOOLCHAIN=<root> "
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"or set the SWIFT_TOOLCHAIN env var.")
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endif()
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message(STATUS "Swift: ${SWIFTC}")
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message(STATUS "Swift resource dir: ${SWIFT_RESOURCE_DIR}")
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# --- Build ---
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add_compile_options(-ffreestanding -nostdlib -O0 -g)
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set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld)
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add_link_options(
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-fuse-ld=lld
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-nostdlib
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-static
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-Wl,-T,${LINKER_SCRIPT}
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)
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set(SWIFT_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/Source/kernel.swift)
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set(SWIFT_OBJ ${CMAKE_CURRENT_BINARY_DIR}/kernel_swift.o)
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add_custom_command(
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OUTPUT ${SWIFT_OBJ}
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COMMAND ${SWIFTC}
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-target aarch64-none-none-elf
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-enable-experimental-feature Embedded
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-parse-as-library
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-wmo
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-O
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-Xcc -fno-stack-protector
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-resource-dir ${SWIFT_RESOURCE_DIR}
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-c ${SWIFT_SOURCES}
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-o ${SWIFT_OBJ}
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COMMAND ${LLVM_OBJCOPY} --remove-section=.swift_modhash ${SWIFT_OBJ}
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DEPENDS ${SWIFT_SOURCES}
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COMMENT "Compiling Swift kernel"
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)
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set_source_files_properties(${SWIFT_OBJ} PROPERTIES
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EXTERNAL_OBJECT TRUE
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GENERATED TRUE
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)
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add_executable(kernel.elf Source/entry.S Source/stubs.c ${SWIFT_OBJ})
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add_custom_command(TARGET kernel.elf POST_BUILD
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COMMAND ${LLVM_OBJCOPY} -O binary kernel.elf kernel.bin
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COMMENT "kernel.elf -> kernel.bin"
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)
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