BuildSystem: We are now using cmake instead of plain make

I have been annoyed for a while since I had to build everything
when running the os since the buildsystem was really bad.

I wanted to rewrite the whole build system and changed to using cmake

:)

kernel/.gitignore

@@ -1,3 +0,0 @@
-*.d
-*.kernel
-*.o

kernel/CMakeLists.txt

@@ -0,0 +1,141 @@
+cmake_minimum_required(VERSION 3.26)
+
+project(kernel CXX ASM)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
+set(CMAKE_CXX_COMPILER ${BANAN_ARCH}-elf-g++)
+set(CMAKE_CXX_COMPILER_WORKS True)
+	
+set(KERNEL_SOURCES
+	font/prefs.psf.o
+	kernel/ACPI.cpp
+	kernel/APIC.cpp
+	kernel/build_libc.cpp
+	kernel/CPUID.cpp
+	kernel/Debug.cpp
+	kernel/Device.cpp
+	kernel/DeviceManager.cpp
+	kernel/ELF.cpp
+	kernel/Font.cpp
+	kernel/FS/Ext2.cpp
+	kernel/FS/VirtualFileSystem.cpp
+	kernel/Input/PS2Controller.cpp
+	kernel/Input/PS2Keyboard.cpp
+	kernel/Input/PS2Keymap.cpp
+	kernel/InterruptController.cpp
+	kernel/kernel.cpp
+	kernel/kmalloc.cpp
+	kernel/PCI.cpp
+	kernel/PIC.cpp
+	kernel/PIT.cpp
+	kernel/Process.cpp
+	kernel/RTC.cpp
+	kernel/Scheduler.cpp
+	kernel/Semaphore.cpp
+	kernel/Serial.cpp
+	kernel/Shell.cpp
+	kernel/SpinLock.cpp
+	kernel/SSP.cpp
+	kernel/Storage/ATAController.cpp
+	kernel/Storage/StorageDevice.cpp
+	kernel/Syscall.cpp
+	kernel/Thread.cpp
+	kernel/TTY.cpp
+	kernel/VesaTerminalDriver.cpp
+	userspace/userspace.cpp
+	icxxabi.cpp
+)
+
+if(ENABLE_KERNEL_UBSAN)
+	set(KERNEL_SOURCES ${KERNEL_SOURCES} ubsan.cpp)
+endif()
+
+if("${BANAN_ARCH}" STREQUAL "x86_64")
+	set(KERNEL_SOURCES
+		${KERNEL_SOURCES}
+		arch/x86_64/boot.S
+		arch/x86_64/GDT.cpp
+		arch/x86_64/IDT.cpp
+		arch/x86_64/interrupts.S
+		arch/x86_64/MMU.cpp
+		arch/x86_64/SpinLock.S
+		arch/x86_64/Thread.S
+	)
+elseif("${BANAN_ARCH}" EQUAL "i386")
+	set(KERNEL_SOURCES
+		${KERNEL_SOURCES}
+		arch/i386/boot.S
+		arch/i386/GDT.cpp
+		arch/i386/IDT.cpp
+		arch/i386/MMU.cpp
+		arch/i386/SpinLock.S
+		arch/i386/Thread.S
+	)
+else()
+	message(FATAL_ERROR "unsupported architecure")
+endif()
+
+set(BAN_SOURCES
+	../BAN/BAN/Memory.cpp
+	../BAN/BAN/String.cpp
+	../BAN/BAN/StringView.cpp
+	../BAN/BAN/Time.cpp
+)
+
+set(LIBC_SOURCES
+	../libc/ctype.cpp
+	../libc/string.cpp
+)
+
+set(KERNEL_SOURCES
+	${KERNEL_SOURCES}
+	${BAN_SOURCES}
+	${LIBC_SOURCES}
+)
+
+add_executable(kernel ${KERNEL_SOURCES})
+
+target_include_directories(kernel PUBLIC include ../BAN/include ../libc/include)
+
+target_compile_definitions(kernel PUBLIC __is_kernel)
+target_compile_definitions(kernel PUBLIC __arch=x86_64)
+
+target_compile_options(kernel PUBLIC -O2 -g)
+target_compile_options(kernel PUBLIC -Wno-literal-suffix)
+target_compile_options(kernel PUBLIC -fno-rtti -fno-exceptions)
+target_compile_options(kernel PUBLIC -fstack-protector -ffreestanding -Wall -Wextra -Werror=return-type -fno-omit-frame-pointer -mno-sse -mno-sse2)
+
+if(ENABLE_KERNEL_UBSAN)
+	target_compile_options(kernel PUBLIC -fsanitize=undefined)
+endif()
+
+if("${BANAN_ARCH}" STREQUAL "x86_64")
+	target_compile_options(kernel PUBLIC -mcmodel=large -mno-red-zone -mno-mmx)
+	target_link_options(kernel PUBLIC LINKER:-z,max-page-size=4096)
+	target_link_options(kernel PUBLIC LINKER:-T,${CMAKE_CURRENT_SOURCE_DIR}/arch/x86_64/linker.ld)
+elseif("${BANAN_ARCH}" STREQUAL "i386")
+	target_link_options(kernel PUBLIC LINKER:-T,${CMAKE_CURRENT_SOURCE_DIR}/arch/i386/linker.ld)
+endif()
+
+target_link_options(kernel PUBLIC -ffreestanding -nostdlib -O2)
+
+add_custom_target(kernel-install
+	COMMAND cp -r ${CMAKE_CURRENT_SOURCE_DIR}/include/* ${BANAN_INCLUDE}/
+	COMMAND cp ${CMAKE_CURRENT_BINARY_DIR}/kernel ${BANAN_BOOT}/banan-os.kernel
+	DEPENDS sysroot
+	DEPENDS kernel
+)
+
+execute_process(COMMAND ${CMAKE_CXX_COMPILER} -print-file-name=crtbegin.o OUTPUT_VARIABLE CRTBEGIN OUTPUT_STRIP_TRAILING_WHITESPACE)
+execute_process(COMMAND ${CMAKE_CXX_COMPILER} -print-file-name=crtend.o OUTPUT_VARIABLE CRTEND OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+add_custom_command(
+	TARGET kernel PRE_LINK
+	COMMAND ${CMAKE_CXX_COMPILER} -MD -c ${CMAKE_CURRENT_SOURCE_DIR}/arch/${BANAN_ARCH}/crti.S ${COMPILE_OPTIONS}
+	COMMAND ${CMAKE_CXX_COMPILER} -MD -c ${CMAKE_CURRENT_SOURCE_DIR}/arch/${BANAN_ARCH}/crtn.S ${COMPILE_OPTIONS}
+	COMMAND cp ${CRTBEGIN} .
+	COMMAND cp ${CRTEND} .
+)
+
+set(CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_COMPILER} <CMAKE_CXX_LINK_FLAGS> <FLAGS> <LINK_FLAGS> -o <TARGET> ${CMAKE_CURRENT_BINARY_DIR}/crti.o ${CMAKE_CURRENT_BINARY_DIR}/crtbegin.o <OBJECTS> ${CMAKE_CURRENT_BINARY_DIR}/crtend.o ${CMAKE_CURRENT_BINARY_DIR}/crtn.o")

kernel/Makefile

@@ -1,138 +0,0 @@
-DEFAULT_HOST!=../default-host.sh
-HOST?=DEFAULT_HOST
-HOSTARCH!=../target-triplet-to-arch.sh $(HOST)
- 
-CFLAGS?=-O2 -g
-CPPFLAGS?=
-LDFLAGS?=
-LIBS?=
- 
-DESTDIR?=
-PREFIX?=/usr/local
-EXEC_PREFIX?=$(PREFIX)
-BOOTDIR?=$(EXEC_PREFIX)/boot
-INCLUDEDIR?=$(PREFIX)/include
- 
-CFLAGS:=$(CFLAGS) -D__is_kernel -D__arch=$(HOSTARCH) -Iinclude -fstack-protector -ffreestanding -Wall -Wextra -Werror=return-type -fno-omit-frame-pointer -mno-sse -mno-sse2
-CPPFLAGS:=$(CPPFLAGS) -fno-rtti -fno-exceptions
-LDFLAGS:=$(LDFLAGS)
-LIBS:=$(LIBS) -nostdlib -lk -lbank -lgcc
- 
-ARCHDIR=arch/$(HOSTARCH)
- 
-include $(ARCHDIR)/make.config
- 
-CFLAGS:=$(CFLAGS) $(KERNEL_ARCH_CFLAGS)
-CPPFLAGS:=$(CPPFLAGS) $(KERNEL_ARCH_CPPFLAGS)
-LDFLAGS:=$(LDFLAGS) $(KERNEL_ARCH_LDFLAGS)
-LIBS:=$(LIBS) $(KERNEL_ARCH_LIBS)
- 
-ifeq ($(UBSAN), 1)
-CFLAGS:=$(CFLAGS) -fsanitize=undefined
-endif
- 
-BUILDDIR=$(abspath build)
- 
-KERNEL_OBJS=					\
-$(KERNEL_ARCH_OBJS)				\
-font/prefs.o					\
-kernel/ACPI.o					\
-kernel/APIC.o					\
-kernel/build_libc.o				\
-kernel/CPUID.o					\
-kernel/Debug.o					\
-kernel/Device.o					\
-kernel/DeviceManager.o			\
-kernel/Font.o					\
-kernel/FS/Ext2.o				\
-kernel/FS/VirtualFileSystem.o	\
-kernel/Input/PS2Controller.o	\
-kernel/Input/PS2Keyboard.o		\
-kernel/Input/PS2Keymap.o		\
-kernel/InterruptController.o	\
-kernel/kernel.o					\
-kernel/kmalloc.o				\
-kernel/PCI.o					\
-kernel/PIC.o					\
-kernel/PIT.o					\
-kernel/Process.o				\
-kernel/RTC.o					\
-kernel/Scheduler.o				\
-kernel/Semaphore.o				\
-kernel/Serial.o					\
-kernel/Shell.o					\
-kernel/SpinLock.o				\
-kernel/SSP.o					\
-kernel/Storage/ATAController.o	\
-kernel/Storage/StorageDevice.o	\
-kernel/Syscall.o				\
-kernel/Thread.o					\
-kernel/TTY.o					\
-kernel/VesaTerminalDriver.o		\
-userspace/userspace.o			\
-icxxabi.o						\
-ubsan.o							\
- 
-OBJS=					\
-$(ARCHDIR)/crti.o		\
-$(ARCHDIR)/crtbegin.o	\
-$(KERNEL_OBJS)			\
-$(ARCHDIR)/crtend.o		\
-$(ARCHDIR)/crtn.o		\
- 
-LINK_LIST=				\
-$(LDFLAGS)				\
-$(ARCHDIR)/crti.o		\
-$(ARCHDIR)/crtbegin.o	\
-$(KERNEL_OBJS)			\
-$(LIBS)					\
-$(ARCHDIR)/crtend.o		\
-$(ARCHDIR)/crtn.o		\
- 
-.PHONY: all always clean install install-headers install-kernel
-.SUFFIXES: .o .c .cpp .S .psf
- 
-all: banan-os.kernel
- 
-banan-os.kernel: always $(OBJS) $(ARCHDIR)/linker.ld
-	cd $(BUILDDIR) && $(CXX) -T ../$(ARCHDIR)/linker.ld -o banan-os.kernel $(CFLAGS) $(CPPFLAGS) $(LINK_LIST)
-	cd $(BUILDDIR) && grub-file --is-x86-multiboot banan-os.kernel
- 
-$(ARCHDIR)/crtbegin.o $(ARCHDIR)/crtend.o:
-	OBJ=`$(CC) $(CFLAGS) $(LDFLAGS) -print-file-name=$(@F)` && cp "$$OBJ" $(BUILDDIR)/$@
- 
-.c.o:
-	$(CC) -MD -c $< -o $(BUILDDIR)/$@ $(CFLAGS)
- 
-.cpp.o:
-	$(CXX) -MD -c $< -o $(BUILDDIR)/$@ $(CFLAGS) $(CPPFLAGS)
- 
-.S.o:
-	$(CC) -MD -c $< -o $(BUILDDIR)/$@ $(CFLAGS)
- 
-.psf.o:
-	objcopy -O $(ELF_FORMAT) -B i386 -I binary $< $(BUILDDIR)/$@
-
-always:
-	mkdir -p $(BUILDDIR)/$(ARCHDIR)
-	mkdir -p $(BUILDDIR)/kernel
-	mkdir -p $(BUILDDIR)/kernel/FS
-	mkdir -p $(BUILDDIR)/kernel/Input
-	mkdir -p $(BUILDDIR)/kernel/Storage
-	mkdir -p $(BUILDDIR)/userspace
-	mkdir -p $(BUILDDIR)/font
-
-clean:
-	rm -rf $(BUILDDIR)
-
-install: install-headers install-kernel
- 
-install-headers:
-	mkdir -p $(DESTDIR)$(INCLUDEDIR)
-	cp -R --preserve=timestamps include/. $(DESTDIR)$(INCLUDEDIR)/.
- 
-install-kernel: banan-os.kernel
-	mkdir -p $(DESTDIR)$(BOOTDIR)
-	cp $(BUILDDIR)/banan-os.kernel $(DESTDIR)$(BOOTDIR)
- 
--include $(OBJS:.o=.d)

kernel/arch/i386/make.config

@@ -1,15 +0,0 @@
-KERNEL_ARCH_CFLAGS=
-KERNEL_ARCH_CPPFLAGS=
-KERNEL_ARCH_LDFLAGS=
-KERNEL_ARCH_LIBS=
- 
-ELF_FORMAT=elf32-i386
-
-KERNEL_ARCH_OBJS=		\
-$(ARCHDIR)/boot.o		\
-$(ARCHDIR)/GDT.o		\
-$(ARCHDIR)/IDT.o		\
-$(ARCHDIR)/MMU.o		\
-$(ARCHDIR)/SpinLock.o	\
-$(ARCHDIR)/Thread.o		\
- 

kernel/arch/x86_64/make.config

@@ -1,16 +0,0 @@
-KERNEL_ARCH_CFLAGS=-mcmodel=large -mno-red-zone -mno-mmx
-KERNEL_ARCH_CPPFLAGS=
-KERNEL_ARCH_LDFLAGS=-z max-page-size=4096
-KERNEL_ARCH_LIBS=
- 
-ELF_FORMAT=elf64-x86-64
-
-KERNEL_ARCH_OBJS=		\
-$(ARCHDIR)/boot.o		\
-$(ARCHDIR)/GDT.o		\
-$(ARCHDIR)/IDT.o		\
-$(ARCHDIR)/interrupts.o	\
-$(ARCHDIR)/MMU.o		\
-$(ARCHDIR)/SpinLock.o	\
-$(ARCHDIR)/Thread.o		\
-