wip swift in kernel

Kernel/CMakeLists.txt

@@ -1,6 +1,10 @@
 cmake_minimum_required(VERSION 3.10)
 project(ksOSKernel LANGUAGES ASM C)
 
+set(SWIFT_TOOLCHAIN "$ENV{HOME}/Library/Developer/Toolchains/swift-6.2.3-RELEASE.xctoolchain")
+set(SWIFTC "${SWIFT_TOOLCHAIN}/usr/bin/swiftc")
+set(SWIFT_RESOURCE_DIR "${SWIFT_TOOLCHAIN}/usr/lib/swift")
+
 add_compile_options(-ffreestanding -nostdlib -O0 -g)
 
 set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld)
@@ -11,8 +15,33 @@ add_link_options(
     -Wl,-T,${LINKER_SCRIPT}
 )
 
-add_executable(kernel.elf Source/entry.S)
+set(SWIFT_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/Source/kernel.swift)
+set(SWIFT_OBJ ${CMAKE_CURRENT_BINARY_DIR}/kernel_swift.o)
+
+add_custom_command(
+    OUTPUT ${SWIFT_OBJ}
+    COMMAND ${SWIFTC}
+        -target aarch64-none-none-elf
+        -enable-experimental-feature Embedded
+        -parse-as-library
+        -wmo
+        -O
+        -Xcc -fno-stack-protector
+        -resource-dir ${SWIFT_RESOURCE_DIR}
+        -c ${SWIFT_SOURCES}
+        -o ${SWIFT_OBJ}
+    DEPENDS ${SWIFT_SOURCES}
+    COMMENT "Compiling Swift kernel"
+)
+
+set_source_files_properties(${SWIFT_OBJ} PROPERTIES
+    EXTERNAL_OBJECT TRUE
+    GENERATED TRUE
+)
+
+add_executable(kernel.elf Source/entry.S Source/stubs.c ${SWIFT_OBJ})
+
 add_custom_command(TARGET kernel.elf POST_BUILD
     COMMAND ${LLVM_OBJCOPY} -O binary kernel.elf kernel.bin
     COMMENT "kernel.elf -> kernel.bin"
-)
+)