Use CMake as build system

.github/workflows/build.yml

@@ -14,11 +14,13 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: Install dependencies
-      run: sudo apt-get install gcc-riscv64-unknown-elf libnewlib-dev
-    - name: Make
-      run: make CROSS_PREFIX=riscv64-unknown-elf-
+      run: sudo apt-get install gcc-riscv64-unknown-elf
+    - name: Configure CMake
+      run: cmake -DCMAKE_TOOLCHAIN_FILE=cmake/riscv64.cmake -B ${{github.workspace}}/build
+    - name: Build
+      run: cmake --build ${{github.workspace}}/build
     - name: Upload artifacts
       uses: actions/upload-artifact@v3
       with:
         name: kernel.elf
-        path: build/kernel.elf
+        path: ${{github.workspace}}/build/kernel.elf

.gitignore

@@ -1,8 +1 @@
-# Build products
-*.o
-*.d
-*.elf
-
-# LSP files
-compile_commands.json
-.cache/
+build/

CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.29)
+
+project(karg ASM C)
+
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/kernel.ld)
+set(CMAKE_C_FLAGS "-ffreestanding -mcmodel=medany")
+set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -nostdlib -T ${LINKER_SCRIPT}")
+
+add_executable(karg.elf src/entry.S src/kmain.c src/kprintf.c src/syscall.c src/trap.S src/uart.c)
+set_target_properties(karg.elf PROPERTIES LINK_DEPENDS ${LINKER_SCRIPT})
+target_include_directories(karg.elf PRIVATE include/)

cmake/riscv64.cmake

@@ -0,0 +1,4 @@
+set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
+
+set(TOOLCHAIN_PREFIX "riscv64-unknown-elf-")
+set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}gcc)