Setup cmake project

cmake/CMakeLists.txt

@@ -0,0 +1,36 @@
+cmake_minimum_required(VERSION 3.14)
+
+# Set source directory variables
+set(CHURLOS_ROOT_DIR "${CMAKE_CURRENT_LIST_DIR}/..")
+set(CHURLOS_SRC_DIR "${CHURLOS_ROOT_DIR}/src")
+set(CHURLOS_TOOL_DIR "${CHURLOS_ROOT_DIR}/tools")
+
+# Set output directory variables
+set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/static)
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/shared)
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+
+# Force out of source build
+message(STATUS "Force out of source build check...")
+string(COMPARE EQUAL "${CMAKE_SOURCE_DIR}" "${CMAKE_BINARY_DIR}" insource)
+if (insource)
+    message(FATAL_ERROR "Please do not build in your source dir. Use a dedicated build folder!")
+endif ()
+
+# Set compiler-flags
+ENABLE_LANGUAGE(ASM_NASM)
+set(CMAKE_ASM_NASM_OBJECT_FORMAT "elf32")
+set(CMAKE_ASM_NASM_INCLUDES "${CHURLOS_SRC_DIR}/")
+set(CMAKE_ASM_NASM_COMPILE_OBJECT "<CMAKE_ASM_NASM_COMPILER> -I${CMAKE_ASM_NASM_INCLUDES} -f ${CMAKE_ASM_NASM_OBJECT_FORMAT} -o <OBJECT> <SOURCE>")
+set(CMAKE_C_FLAGS "-m32 -march=i386 -mfpmath=387 -mno-mmx -mno-sse -mno-avx -Wall -fno-stack-protector -nostdlib -fno-pic -no-pie -ffreestanding")
+if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 9)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mmanual-endbr")
+endif()
+set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -Wl,--build-id=none -Wno-non-virtual-dtor -fno-threadsafe-statics -Wplacement-new=0 -fno-use-cxa-atexit -fno-rtti -fno-exceptions -std=c++20 -T ${CHURLOS_SRC_DIR}/link.ld")
+
+# Add subdirectories
+add_subdirectory(bootdisk)
+add_subdirectory(device)
+add_subdirectory(kernel)
+add_subdirectory(lib)
+add_subdirectory(system)