Starting and testing cmake as a toolchain

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.16)
+project(BarinkOS LANGUAGES C CXX ASM)
+
+add_subdirectory(CoreLib)
+add_subdirectory(Kernel)

CoreLib/CMakeLists.txt

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+project(CoreLib LANGUAGES CXX)
+
+set(SOURCES
+	ctype.cpp
+	Memory.cpp
+	Path.cpp
+	Stack.cpp
+	String.cpp
+	StringView.cpp
+)
+
+add_library(CoreLib STATIC ${SOURCES})
+
+target_include_directories(CoreLib PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)

kernel/CMakeLists.txt

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+
+project(Kernel LANGUAGES C CXX ASM)
+
+set(SOURCES
+	main.cpp
+	boot.s
+)
+
+add_executable(kernel.elf ${SOURCES})
+target_link_libraries(kernel.elf PRIVATE CoreLib)
+set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/link.ld)
+target_link_options(kernel.elf PRIVATE "-T${LINKER_SCRIPT}")
+

toolchain-i686-elf.cmake

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+# toolchain-i686-elf.cmake
+set(CMAKE_SYSTEM_NAME Generic)
+set(CMAKE_SYSTEM_PROCESSOR i686)
+
+# Point to your custom cross tools
+set(CMAKE_C_COMPILER /opt/cross/bin/i686-elf-gcc)
+set(CMAKE_CXX_COMPILER /opt/cross/bin/i686-elf-g++)
+set(CMAKE_ASM_COMPILER /opt/cross/bin/i686-elf-as)
+set(CMAKE_AR /opt/cross/bin/i686-elf-ar)
+set(CMAKE_RANLIB /opt/cross/bin/i686-elf-ranlib)
+set(CMAKE_C_COMPILER_WORKS TRUE)
+set(CMAKE_CXX_COMPILER_WORKS TRUE)
+
+# Flags for freestanding OS development
+set(CMAKE_C_FLAGS "-ffreestanding -Og -ggdb -Wall -Wextra")
+set(CMAKE_CXX_FLAGS "-ffreestanding -Og -ggdb -Wall -Wextra")
+