build: convert build system to CMake

CMakeLists.txt

@@ -0,0 +1,48 @@
+cmake_minimum_required(VERSION 3.13)
+project(magenta C ASM)
+
+set(CMAKE_C_STANDARD 17)
+
+set(kernel_name "Magenta")
+set(kernel_exe_name "magenta_kernel")
+
+set(generic_src_dirs ds init kernel libc obj sched util vm)
+set(kernel_sources "")
+set(kernel_headers "")
+
+foreach (dir ${generic_src_dirs})
+	message(STATUS ${dir})
+	file(GLOB_RECURSE dir_sources ${dir}/*.c)
+	file(GLOB_RECURSE dir_headers ${dir}/*.h)
+
+	set(kernel_sources ${kernel_sources} ${dir_sources})
+	set(kernel_headers ${kernel_headers} ${dir_headers})
+endforeach (dir)
+
+set(kernel_arch x86_64)
+file(GLOB_RECURSE arch_sources_c arch/${kernel_arch}/*.c)
+file(GLOB_RECURSE arch_sources_asm arch/${kernel_arch}/*.S)
+file(GLOB_RECURSE arch_headers arch/${kernel_arch}/*.h)
+
+set_property(SOURCE ${arch_sources_asm} PROPERTY LANGUAGE C)
+
+add_executable(${kernel_exe_name}
+	${kernel_sources}
+	${kernel_headers}
+	${arch_sources_c}
+	${arch_sources_asm}
+	${arch_headers})
+
+target_include_directories(${kernel_exe_name} PRIVATE 
+	include 
+	libc/include
+	arch/${kernel_arch}/include)
+target_compile_options(${kernel_exe_name} PRIVATE
+	-nostdlib -ffreestanding
+	-Wall -Werror -pedantic -Wno-language-extension-token -Wno-unused-function  -Wno-gnu-statement-expression
+	-O2 -g -fPIC -Iinclude -Iarch/${kernel_arch}/include -Ilibc/include)
+target_link_libraries(${kernel_exe_name} -nostdlib -ffreestanding -lgcc)
+target_compile_definitions(${kernel_exe_name} PRIVATE BUILD_ID="0")
+
+include(arch/${kernel_arch}/config.cmake)
+include(arch/${kernel_arch}/targets.cmake)

Makefile

@@ -41,6 +41,13 @@ LIBC_SRC_DIRS := stdio string ctype
 LIBC_C_FILES := $(foreach dir,$(LIBC_SRC_DIRS),$(shell find libc/$(dir) -type f -name *.c))
 LIBC_OBJ := $(addprefix $(BUILD_DIR)/,$(LIBC_C_FILES:.c=.o))
 
+####################################
+# Userboot source files
+####################################
+
+USERBOOT_C_FILES := $(shell find userboot -type f -name *.c)
+USERBOOT_OBJ := $(addprefix $(BUILD_DIR)/,$(USERBOOT_C_FILES:.c=.o))
+
 BUILD_ID := $(shell tools/socks.buildid --arch $(SOCKS_ARCH))
 
 CWARNINGS := -Wall -Werror -pedantic -Wno-language-extension-token -Wno-unused-function  -Wno-gnu-statement-expression

arch/x86_64/config.cmake

@@ -0,0 +1,5 @@
+target_compile_options(${kernel_exe_name} PRIVATE
+	-z max-page-size=0x1000 -m64 -mcmodel=large -mno-red-zone -mno-mmx
+	-mno-sse -mno-sse2 -D_64BIT -DBYTE_ORDER=1234)
+target_link_libraries(${kernel_exe_name} "-z max-page-size=0x1000" "-T ${CMAKE_CURRENT_SOURCE_DIR}/arch/x86_64/layout.ld")
+

arch/x86_64/targets.cmake

@@ -0,0 +1,7 @@
+find_program(QEMU qemu-system-x86_64)
+
+add_custom_target(run
+	USES_TERMINAL
+	COMMAND ${QEMU}
+		-kernel $<TARGET_FILE:${kernel_exe_name}>
+		-serial stdio)

arch/x86_64/toolchain.cmake

@@ -0,0 +1,18 @@
+# the name of the target operating system
+set(CMAKE_SYSTEM_NAME Magenta)
+
+# which compilers to use for C and C++
+set(CMAKE_C_COMPILER   x86_64-elf-gcc)
+set(CMAKE_ASM_COMPILER   x86_64-elf-gcc)
+set(CMAKE_CXX_COMPILER x86_64-elf-g++)
+
+set(CMAKE_C_COMPILER_WORKS TRUE)
+set(CMAKE_CXX_COMPILER_WORKS TRUE)
+
+# adjust the default behavior of the FIND_XXX() commands:
+# search programs in the host environment
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+
+# search headers and libraries in the target environment
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

tools/CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.13)
+project(magenta-tools C)
+
+set(tool_dirs e64patch)
+
+foreach (dir ${tool_dirs})
+	add_subdirectory(${dir})
+endforeach (dir)

tools/e64patch/CMakeLists.txt

@@ -0,0 +1,3 @@
+file(GLOB sources *.c *.h)
+
+add_executable(e64patch ${sources})