From 19f66b8e6bef80bbfaffef33b930d27b083e4e43 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sun, 28 Dec 2025 20:45:41 +0000
Subject: [PATCH 1/5] Initial plan


From be0439448eb695979e877a0c1cb064369049faad Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sun, 28 Dec 2025 20:51:52 +0000
Subject: [PATCH 2/5] Fix CMake build system to work properly

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>
---
 CMakeLists.txt                                |  24 +-
 cmake-build/Makefile                          | 382 ++++++++++++++
 .../Testing/Temporary/CTestCostData.txt       |   2 +
 cmake-build/bin/test_bootloader               | Bin 0 -> 16016 bytes
 cmake-build/bootloader/Makefile               | 272 ++++++++++
 cmake-build/kernel/Makefile                   | 488 ++++++++++++++++++
 cmake-build/tests/Makefile                    | 257 +++++++++
 kernel/CMakeLists.txt                         |   2 +
 8 files changed, 1422 insertions(+), 5 deletions(-)
 create mode 100644 cmake-build/Makefile
 create mode 100644 cmake-build/Testing/Temporary/CTestCostData.txt
 create mode 100755 cmake-build/bin/test_bootloader
 create mode 100644 cmake-build/bootloader/Makefile
 create mode 100644 cmake-build/kernel/Makefile
 create mode 100644 cmake-build/tests/Makefile

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d152d2f..0888c4a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -53,9 +53,9 @@ endif()
 # Custom target to create bootable image
 find_program(MFORMAT mformat)
 find_program(MCOPY mcopy)
-find_program(MDD mdd)
+find_program(MMD mmd)
 
-if(MFORMAT AND MCOPY)
+if(MFORMAT AND MCOPY AND MMD)
     add_custom_target(image
         COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_BINARY_DIR}/build/iso/EFI/BOOT
         COMMAND ${CMAKE_COMMAND} -E copy 
@@ -65,10 +65,10 @@ if(MFORMAT AND MCOPY)
             ${CMAKE_BINARY_DIR}/kernel/metalos.bin 
             ${CMAKE_BINARY_DIR}/build/iso/
         COMMAND ${CMAKE_COMMAND} -E echo "Creating disk image..."
-        COMMAND dd if=/dev/zero of=${CMAKE_BINARY_DIR}/build/metalos.img bs=1M count=64 2>/dev/null
+        COMMAND dd if=/dev/zero of=${CMAKE_BINARY_DIR}/build/metalos.img bs=1M count=64
         COMMAND ${MFORMAT} -i ${CMAKE_BINARY_DIR}/build/metalos.img -F -v METALOS ::
-        COMMAND ${MDD} -i ${CMAKE_BINARY_DIR}/build/metalos.img ::/EFI
-        COMMAND ${MDD} -i ${CMAKE_BINARY_DIR}/build/metalos.img ::/EFI/BOOT
+        COMMAND ${MMD} -i ${CMAKE_BINARY_DIR}/build/metalos.img ::/EFI
+        COMMAND ${MMD} -i ${CMAKE_BINARY_DIR}/build/metalos.img ::/EFI/BOOT
         COMMAND ${MCOPY} -i ${CMAKE_BINARY_DIR}/build/metalos.img 
             ${CMAKE_BINARY_DIR}/build/iso/EFI/BOOT/bootx64.efi ::/EFI/BOOT/
         COMMAND ${MCOPY} -i ${CMAKE_BINARY_DIR}/build/metalos.img 
@@ -143,6 +143,20 @@ if(QEMU)
             COMMENT "Running MetalOS in QEMU with GDB server (port 1234)"
             VERBATIM
         )
+        
+        add_custom_target(qemu-uefi-test
+            COMMAND ${CMAKE_COMMAND} -E echo "Testing QEMU UEFI boot (no OS image)..."
+            COMMAND ${CMAKE_COMMAND} -E echo "Using OVMF firmware: ${OVMF_FIRMWARE}"
+            COMMAND ${CMAKE_COMMAND} -E echo "This will boot to UEFI shell in nographic mode."
+            COMMAND ${CMAKE_COMMAND} -E echo "You should see UEFI boot messages. Press Ctrl-A then X to exit QEMU."
+            COMMAND ${QEMU}
+                -drive if=pflash,format=raw,readonly=on,file=${OVMF_FIRMWARE}
+                -m 512M
+                -nographic
+                -net none
+            COMMENT "Testing QEMU UEFI setup without OS image"
+            VERBATIM
+        )
     else()
         message(WARNING "OVMF firmware not found - QEMU targets will not be available")
     endif()
diff --git a/cmake-build/Makefile b/cmake-build/Makefile
new file mode 100644
index 0000000..b6e39ff
--- /dev/null
+++ b/cmake-build/Makefile
@@ -0,0 +1,382 @@
+# CMAKE generated file: DO NOT EDIT!
+# Generated by "Unix Makefiles" Generator, CMake Version 3.31
+
+# Default target executed when no arguments are given to make.
+default_target: all
+.PHONY : default_target
+
+# Allow only one "make -f Makefile2" at a time, but pass parallelism.
+.NOTPARALLEL:
+
+#=============================================================================
+# Special targets provided by cmake.
+
+# Disable implicit rules so canonical targets will work.
+.SUFFIXES:
+
+# Disable VCS-based implicit rules.
+% : %,v
+
+# Disable VCS-based implicit rules.
+% : RCS/%
+
+# Disable VCS-based implicit rules.
+% : RCS/%,v
+
+# Disable VCS-based implicit rules.
+% : SCCS/s.%
+
+# Disable VCS-based implicit rules.
+% : s.%
+
+.SUFFIXES: .hpux_make_needs_suffix_list
+
+# Command-line flag to silence nested $(MAKE).
+$(VERBOSE)MAKESILENT = -s
+
+#Suppress display of executed commands.
+$(VERBOSE).SILENT:
+
+# A target that is always out of date.
+cmake_force:
+.PHONY : cmake_force
+
+#=============================================================================
+# Set environment variables for the build.
+
+# The shell in which to execute make rules.
+SHELL = /bin/sh
+
+# The CMake executable.
+CMAKE_COMMAND = /usr/local/bin/cmake
+
+# The command to remove a file.
+RM = /usr/local/bin/cmake -E rm -f
+
+# Escaping for special characters.
+EQUALS = =
+
+# The top-level source directory on which CMake was run.
+CMAKE_SOURCE_DIR = /home/runner/work/MetalOS/MetalOS
+
+# The top-level build directory on which CMake was run.
+CMAKE_BINARY_DIR = /home/runner/work/MetalOS/MetalOS/cmake-build
+
+#=============================================================================
+# Targets provided globally by CMake.
+
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+test:
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Running tests..."
+	/usr/local/bin/ctest --force-new-ctest-process $(ARGS)
+.PHONY : test
+
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+test/fast: test
+.PHONY : test/fast
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+edit_cache:
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Running CMake cache editor..."
+	/usr/local/bin/ccmake -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR)
+.PHONY : edit_cache
+
+# Special rule for the target edit_cache
+edit_cache/fast: edit_cache
+.PHONY : edit_cache/fast
+
+# Special rule for the target rebuild_cache
+rebuild_cache:
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Running CMake to regenerate build system..."
+	/usr/local/bin/cmake --regenerate-during-build -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR)
+.PHONY : rebuild_cache
+
+# Special rule for the target rebuild_cache
+rebuild_cache/fast: rebuild_cache
+.PHONY : rebuild_cache/fast
+
+# Special rule for the target list_install_components
+list_install_components:
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Available install components are: \"Unspecified\""
+.PHONY : list_install_components
+
+# Special rule for the target list_install_components
+list_install_components/fast: list_install_components
+.PHONY : list_install_components/fast
+
+# Special rule for the target install
+install: preinstall
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Install the project..."
+	/usr/local/bin/cmake -P cmake_install.cmake
+.PHONY : install
+
+# Special rule for the target install
+install/fast: preinstall/fast
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Install the project..."
+	/usr/local/bin/cmake -P cmake_install.cmake
+.PHONY : install/fast
+
+# Special rule for the target install/local
+install/local: preinstall
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Installing only the local directory..."
+	/usr/local/bin/cmake -DCMAKE_INSTALL_LOCAL_ONLY=1 -P cmake_install.cmake
+.PHONY : install/local
+
+# Special rule for the target install/local
+install/local/fast: preinstall/fast
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Installing only the local directory..."
+	/usr/local/bin/cmake -DCMAKE_INSTALL_LOCAL_ONLY=1 -P cmake_install.cmake
+.PHONY : install/local/fast
+
+# Special rule for the target install/strip
+install/strip: preinstall
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Installing the project stripped..."
+	/usr/local/bin/cmake -DCMAKE_INSTALL_DO_STRIP=1 -P cmake_install.cmake
+.PHONY : install/strip
+
+# Special rule for the target install/strip
+install/strip/fast: preinstall/fast
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Installing the project stripped..."
+	/usr/local/bin/cmake -DCMAKE_INSTALL_DO_STRIP=1 -P cmake_install.cmake
+.PHONY : install/strip/fast
+
+# The main all target
+all: cmake_check_build_system
+	$(CMAKE_COMMAND) -E cmake_progress_start /home/runner/work/MetalOS/MetalOS/cmake-build/CMakeFiles /home/runner/work/MetalOS/MetalOS/cmake-build//CMakeFiles/progress.marks
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 all
+	$(CMAKE_COMMAND) -E cmake_progress_start /home/runner/work/MetalOS/MetalOS/cmake-build/CMakeFiles 0
+.PHONY : all
+
+# The main clean target
+clean:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 clean
+.PHONY : clean
+
+# The main clean target
+clean/fast: clean
+.PHONY : clean/fast
+
+# Prepare targets for installation.
+preinstall: all
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 preinstall
+.PHONY : preinstall
+
+# Prepare targets for installation.
+preinstall/fast:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 preinstall
+.PHONY : preinstall/fast
+
+# clear depends
+depend:
+	$(CMAKE_COMMAND) -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR) --check-build-system CMakeFiles/Makefile.cmake 1
+.PHONY : depend
+
+#=============================================================================
+# Target rules for targets named image
+
+# Build rule for target.
+image: cmake_check_build_system
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 image
+.PHONY : image
+
+# fast build rule for target.
+image/fast:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/image.dir/build.make CMakeFiles/image.dir/build
+.PHONY : image/fast
+
+#=============================================================================
+# Target rules for targets named qemu
+
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+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 qemu
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+# fast build rule for target.
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+	$(MAKE) $(MAKESILENT) -f CMakeFiles/qemu.dir/build.make CMakeFiles/qemu.dir/build
+.PHONY : qemu/fast
+
+#=============================================================================
+# Target rules for targets named qemu-debug
+
+# Build rule for target.
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+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 qemu-debug
+.PHONY : qemu-debug
+
+# fast build rule for target.
+qemu-debug/fast:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/qemu-debug.dir/build.make CMakeFiles/qemu-debug.dir/build
+.PHONY : qemu-debug/fast
+
+#=============================================================================
+# Target rules for targets named qemu-gdb
+
+# Build rule for target.
+qemu-gdb: cmake_check_build_system
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 qemu-gdb
+.PHONY : qemu-gdb
+
+# fast build rule for target.
+qemu-gdb/fast:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/qemu-gdb.dir/build.make CMakeFiles/qemu-gdb.dir/build
+.PHONY : qemu-gdb/fast
+
+#=============================================================================
+# Target rules for targets named qemu-uefi-test
+
+# Build rule for target.
+qemu-uefi-test: cmake_check_build_system
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+# fast build rule for target.
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+	$(MAKE) $(MAKESILENT) -f CMakeFiles/qemu-uefi-test.dir/build.make CMakeFiles/qemu-uefi-test.dir/build
+.PHONY : qemu-uefi-test/fast
+
+#=============================================================================
+# Target rules for targets named bootloader_obj
+
+# Build rule for target.
+bootloader_obj: cmake_check_build_system
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 bootloader_obj
+.PHONY : bootloader_obj
+
+# fast build rule for target.
+bootloader_obj/fast:
+	$(MAKE) $(MAKESILENT) -f bootloader/CMakeFiles/bootloader_obj.dir/build.make bootloader/CMakeFiles/bootloader_obj.dir/build
+.PHONY : bootloader_obj/fast
+
+#=============================================================================
+# Target rules for targets named bootloader_so
+
+# Build rule for target.
+bootloader_so: cmake_check_build_system
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 bootloader_so
+.PHONY : bootloader_so
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+# fast build rule for target.
+bootloader_so/fast:
+	$(MAKE) $(MAKESILENT) -f bootloader/CMakeFiles/bootloader_so.dir/build.make bootloader/CMakeFiles/bootloader_so.dir/build
+.PHONY : bootloader_so/fast
+
+#=============================================================================
+# Target rules for targets named bootloader_efi
+
+# Build rule for target.
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+# Help Target
+help:
+	@echo "The following are some of the valid targets for this Makefile:"
+	@echo "... all (the default if no target is provided)"
+	@echo "... clean"
+	@echo "... depend"
+	@echo "... edit_cache"
+	@echo "... install"
+	@echo "... install/local"
+	@echo "... install/strip"
+	@echo "... list_install_components"
+	@echo "... rebuild_cache"
+	@echo "... test"
+	@echo "... bootloader_efi"
+	@echo "... image"
+	@echo "... kernel_bin"
+	@echo "... qemu"
+	@echo "... qemu-debug"
+	@echo "... qemu-gdb"
+	@echo "... qemu-uefi-test"
+	@echo "... run_tests"
+	@echo "... bootloader_obj"
+	@echo "... bootloader_so"
+	@echo "... kernel_elf"
+	@echo "... kernel_obj"
+	@echo "... test_bootloader"
+.PHONY : help
+
+
+
+#=============================================================================
+# Special targets to cleanup operation of make.
+
+# Special rule to run CMake to check the build system integrity.
+# No rule that depends on this can have commands that come from listfiles
+# because they might be regenerated.
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+	$(CMAKE_COMMAND) -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR) --check-build-system CMakeFiles/Makefile.cmake 0
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diff --git a/cmake-build/Testing/Temporary/CTestCostData.txt b/cmake-build/Testing/Temporary/CTestCostData.txt
new file mode 100644
index 0000000..eac3007
--- /dev/null
+++ b/cmake-build/Testing/Temporary/CTestCostData.txt
@@ -0,0 +1,2 @@
+test_bootloader 1 0.00139881
+---
diff --git a/cmake-build/bin/test_bootloader b/cmake-build/bin/test_bootloader
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+# Convenience name for target.
+tests/CMakeFiles/run_tests.dir/rule:
+	cd /home/runner/work/MetalOS/MetalOS/cmake-build && $(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 tests/CMakeFiles/run_tests.dir/rule
+.PHONY : tests/CMakeFiles/run_tests.dir/rule
+
+# Convenience name for target.
+run_tests: tests/CMakeFiles/run_tests.dir/rule
+.PHONY : run_tests
+
+# fast build rule for target.
+run_tests/fast:
+	cd /home/runner/work/MetalOS/MetalOS/cmake-build && $(MAKE) $(MAKESILENT) -f tests/CMakeFiles/run_tests.dir/build.make tests/CMakeFiles/run_tests.dir/build
+.PHONY : run_tests/fast
+
+unit/test_bootloader.o: unit/test_bootloader.c.o
+.PHONY : unit/test_bootloader.o
+
+# target to build an object file
+unit/test_bootloader.c.o:
+	cd /home/runner/work/MetalOS/MetalOS/cmake-build && $(MAKE) $(MAKESILENT) -f tests/CMakeFiles/test_bootloader.dir/build.make tests/CMakeFiles/test_bootloader.dir/unit/test_bootloader.c.o
+.PHONY : unit/test_bootloader.c.o
+
+unit/test_bootloader.i: unit/test_bootloader.c.i
+.PHONY : unit/test_bootloader.i
+
+# target to preprocess a source file
+unit/test_bootloader.c.i:
+	cd /home/runner/work/MetalOS/MetalOS/cmake-build && $(MAKE) $(MAKESILENT) -f tests/CMakeFiles/test_bootloader.dir/build.make tests/CMakeFiles/test_bootloader.dir/unit/test_bootloader.c.i
+.PHONY : unit/test_bootloader.c.i
+
+unit/test_bootloader.s: unit/test_bootloader.c.s
+.PHONY : unit/test_bootloader.s
+
+# target to generate assembly for a file
+unit/test_bootloader.c.s:
+	cd /home/runner/work/MetalOS/MetalOS/cmake-build && $(MAKE) $(MAKESILENT) -f tests/CMakeFiles/test_bootloader.dir/build.make tests/CMakeFiles/test_bootloader.dir/unit/test_bootloader.c.s
+.PHONY : unit/test_bootloader.c.s
+
+# Help Target
+help:
+	@echo "The following are some of the valid targets for this Makefile:"
+	@echo "... all (the default if no target is provided)"
+	@echo "... clean"
+	@echo "... depend"
+	@echo "... edit_cache"
+	@echo "... install"
+	@echo "... install/local"
+	@echo "... install/strip"
+	@echo "... list_install_components"
+	@echo "... rebuild_cache"
+	@echo "... test"
+	@echo "... run_tests"
+	@echo "... test_bootloader"
+	@echo "... unit/test_bootloader.o"
+	@echo "... unit/test_bootloader.i"
+	@echo "... unit/test_bootloader.s"
+.PHONY : help
+
+
+
+#=============================================================================
+# Special targets to cleanup operation of make.
+
+# Special rule to run CMake to check the build system integrity.
+# No rule that depends on this can have commands that come from listfiles
+# because they might be regenerated.
+cmake_check_build_system:
+	cd /home/runner/work/MetalOS/MetalOS/cmake-build && $(CMAKE_COMMAND) -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR) --check-build-system CMakeFiles/Makefile.cmake 0
+.PHONY : cmake_check_build_system
+
diff --git a/kernel/CMakeLists.txt b/kernel/CMakeLists.txt
index 9c4d380..72e139d 100644
--- a/kernel/CMakeLists.txt
+++ b/kernel/CMakeLists.txt
@@ -63,9 +63,11 @@ add_executable(kernel_elf $<TARGET_OBJECTS:kernel_obj> ${KERNEL_ASM_OBJECTS})
 set_target_properties(kernel_elf PROPERTIES
     OUTPUT_NAME metalos.elf
     LINKER_LANGUAGE C
+    POSITION_INDEPENDENT_CODE OFF
 )
 target_link_options(kernel_elf PRIVATE
     -nostdlib
+    -no-pie
     -T ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld
 )
 

From 408053665dbdf941fedcd1b59e34a09c108567f3 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sun, 28 Dec 2025 20:54:40 +0000
Subject: [PATCH 3/5] Remove Makefiles and update documentation for pure CMake
 build system

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>
---
 .github/workflows/qemu-test.yml               |  42 +-
 .github/workflows/release.yml                 |  35 +-
 .github/workflows/unit-tests.yml              |  16 +-
 .gitignore                                    |   2 +
 CONTRIBUTING.md                               |  16 +-
 Makefile                                      | 144 ------
 README.md                                     |  28 +-
 bootloader/Makefile                           |  55 --
 cmake-build/Makefile                          | 382 --------------
 .../Testing/Temporary/CTestCostData.txt       |   2 -
 cmake-build/bin/test_bootloader               | Bin 16016 -> 0 bytes
 cmake-build/bootloader/Makefile               | 272 ----------
 cmake-build/kernel/Makefile                   | 488 ------------------
 cmake-build/tests/Makefile                    | 257 ---------
 kernel/Makefile                               |  79 ---
 tests/Makefile                                |  64 ---
 16 files changed, 81 insertions(+), 1801 deletions(-)
 delete mode 100644 Makefile
 delete mode 100644 bootloader/Makefile
 delete mode 100644 cmake-build/Makefile
 delete mode 100644 cmake-build/Testing/Temporary/CTestCostData.txt
 delete mode 100755 cmake-build/bin/test_bootloader
 delete mode 100644 cmake-build/bootloader/Makefile
 delete mode 100644 cmake-build/kernel/Makefile
 delete mode 100644 cmake-build/tests/Makefile
 delete mode 100644 kernel/Makefile
 delete mode 100644 tests/Makefile

diff --git a/.github/workflows/qemu-test.yml b/.github/workflows/qemu-test.yml
index 3a04184..545ef16 100644
--- a/.github/workflows/qemu-test.yml
+++ b/.github/workflows/qemu-test.yml
@@ -25,6 +25,7 @@ jobs:
         sudo apt-get update
         sudo apt-get install -y \
           build-essential \
+          cmake \
           nasm \
           qemu-system-x86 \
           ovmf \
@@ -32,19 +33,21 @@ jobs:
           xorriso \
           imagemagick
     
-    - name: Build bootloader
+    - name: Configure CMake
       run: |
-        cd bootloader
-        make
+        mkdir -p build
+        cd build
+        cmake ..
     
-    - name: Build kernel
+    - name: Build bootloader and kernel
       run: |
-        cd kernel
-        make
+        cd build
+        cmake --build .
     
     - name: Create bootable image
       run: |
-        make image
+        cd build
+        cmake --build . --target image
     
     - name: Start QEMU and capture screenshot
       run: |
@@ -56,19 +59,22 @@ jobs:
         XVFB_PID=$!
         sleep 2
         
-        # Verify disk image exists (created by 'make image')
-        if [ ! -f build/metalos.img ]; then
-          echo "Error: build/metalos.img not found!"
+        # Verify disk image exists (created by cmake build)
+        if [ ! -f build/build/metalos.img ]; then
+          echo "Error: build/build/metalos.img not found!"
           exit 1
         fi
         
+        # Create directory for logs
+        mkdir -p build/logs
+        
         # Start QEMU in the background with a timeout
         timeout 30s qemu-system-x86_64 \
           -bios /usr/share/OVMF/OVMF_CODE.fd \
-          -drive format=raw,file=build/metalos.img \
+          -drive format=raw,file=build/build/metalos.img \
           -m 512M \
           -display gtk \
-          -serial file:build/serial.log \
+          -serial file:build/logs/serial.log \
           -no-reboot &
         QEMU_PID=$!
         
@@ -77,7 +83,7 @@ jobs:
         
         # Take screenshot using ImageMagick (optional - don't fail if this doesn't work)
         # Using subshell to prevent 'set -e' from affecting this optional step
-        { import -window root build/qemu-screenshot.png; } || echo "Screenshot capture failed (non-fatal)"
+        { import -window root build/logs/qemu-screenshot.png; } || echo "Screenshot capture failed (non-fatal)"
         
         # Gracefully stop QEMU (don't fail if already stopped)
         kill $QEMU_PID 2>/dev/null || true
@@ -91,9 +97,9 @@ jobs:
     - name: Show serial output
       if: always()
       run: |
-        if [ -f build/serial.log ]; then
+        if [ -f build/logs/serial.log ]; then
           echo "=== QEMU Serial Output ==="
-          cat build/serial.log
+          cat build/logs/serial.log
         else
           echo "No serial output captured"
         fi
@@ -103,7 +109,7 @@ jobs:
       uses: actions/upload-artifact@v4
       with:
         name: qemu-screenshot
-        path: build/qemu-screenshot.png
+        path: build/logs/qemu-screenshot.png
         if-no-files-found: warn
     
     - name: Upload serial log
@@ -111,7 +117,7 @@ jobs:
       uses: actions/upload-artifact@v4
       with:
         name: serial-log
-        path: build/serial.log
+        path: build/logs/serial.log
         if-no-files-found: warn
     
     - name: Upload built disk image
@@ -119,5 +125,5 @@ jobs:
       uses: actions/upload-artifact@v4
       with:
         name: metalos-disk-image
-        path: build/metalos.img
+        path: build/build/metalos.img
         if-no-files-found: warn
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f18bf22..0b95a83 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -24,25 +24,28 @@ jobs:
         sudo apt-get update
         sudo apt-get install -y \
           build-essential \
+          cmake \
           nasm \
           qemu-system-x86 \
           ovmf \
           mtools \
           xorriso
     
-    - name: Build bootloader
+    - name: Configure CMake
       run: |
-        cd bootloader
-        make
+        mkdir -p build
+        cd build
+        cmake ..
     
-    - name: Build kernel
+    - name: Build bootloader and kernel
       run: |
-        cd kernel
-        make
+        cd build
+        cmake --build .
     
     - name: Create bootable image
       run: |
-        make image
+        cd build
+        cmake --build . --target image
     
     - name: Prepare release directory
       run: |
@@ -51,29 +54,29 @@ jobs:
         mkdir -p release
         
         # Copy the bootable disk image (required)
-        if [ -f build/metalos.img ]; then
-          cp build/metalos.img release/
+        if [ -f build/build/metalos.img ]; then
+          cp build/build/metalos.img release/
           echo "✓ Copied metalos.img"
         else
-          echo "Error: build/metalos.img not found!"
+          echo "Error: build/build/metalos.img not found!"
           exit 1
         fi
         
         # Copy bootloader if it exists (required)
-        if [ -f bootloader/bootx64.efi ]; then
-          cp bootloader/bootx64.efi release/
+        if [ -f build/bootloader/bootx64.efi ]; then
+          cp build/bootloader/bootx64.efi release/
           echo "✓ Copied bootx64.efi"
         else
-          echo "Error: bootloader/bootx64.efi not found!"
+          echo "Error: build/bootloader/bootx64.efi not found!"
           exit 1
         fi
         
         # Copy kernel if it exists (required)
-        if [ -f kernel/metalos.bin ]; then
-          cp kernel/metalos.bin release/
+        if [ -f build/kernel/metalos.bin ]; then
+          cp build/kernel/metalos.bin release/
           echo "✓ Copied metalos.bin"
         else
-          echo "Error: kernel/metalos.bin not found!"
+          echo "Error: build/kernel/metalos.bin not found!"
           exit 1
         fi
         
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index ce59676..9c36d61 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -22,17 +22,23 @@ jobs:
         set -e  # Exit on any error
         
         sudo apt-get update
-        sudo apt-get install -y build-essential
+        sudo apt-get install -y build-essential cmake
+    
+    - name: Configure CMake
+      run: |
+        mkdir -p build
+        cd build
+        cmake ..
     
     - name: Build unit tests
       run: |
-        cd tests
-        make all
+        cd build
+        cmake --build .
     
     - name: Run unit tests
       run: |
-        cd tests
-        make test
+        cd build
+        ctest --output-on-failure
     
     - name: Test summary
       if: always()
diff --git a/.gitignore b/.gitignore
index 3fb71e7..43bb39a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,8 @@
 # Build directories
 build/
 build-*/
+cmake-build/
+cmake-build-*/
 bootloader/build/
 kernel/build/
 _codeql_build_dir/
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 29199d3..86eba15 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -152,9 +152,19 @@ Closes #42
 Every PR should be tested in QEMU:
 
 ```bash
-make clean
-make all
-make qemu
+mkdir build && cd build
+cmake ..
+cmake --build .
+cmake --build . --target qemu
+```
+
+Or if you already have a build directory:
+
+```bash
+cd build
+cmake --build . --target clean
+cmake --build .
+cmake --build . --target qemu
 ```
 
 Verify:
diff --git a/Makefile b/Makefile
deleted file mode 100644
index 37c601c..0000000
--- a/Makefile
+++ /dev/null
@@ -1,144 +0,0 @@
-# MetalOS Main Makefile
-# Builds bootloader, kernel, and creates bootable image
-
-.PHONY: all bootloader kernel image qemu qemu-debug qemu-gdb qemu-uefi-test test clean distclean
-
-all: bootloader kernel
-
-# Run unit tests
-test:
-	@echo "Running unit tests..."
-	@cd tests && $(MAKE) test
-
-bootloader:
-	@echo "Building bootloader..."
-	@cd bootloader && $(MAKE) || echo "Warning: Bootloader build failed (expected during Phase 1 development)"
-
-kernel:
-	@echo "Building kernel..."
-	@cd kernel && $(MAKE) || echo "Warning: Kernel build failed (expected during Phase 1 development)"
-
-# Create bootable disk image for UEFI/QEMU
-image: bootloader kernel
-	@chmod +x scripts/create_image.sh
-	@./scripts/create_image.sh
-
-# Run in QEMU with UEFI firmware (OVMF)
-# Automatically detects OVMF path and display mode
-# Set QEMU_DISPLAY=gtk or QEMU_DISPLAY=sdl to use graphical mode
-QEMU_DISPLAY ?= none
-
-qemu: image
-	@echo "Starting QEMU with UEFI firmware..."
-	@bash -c ' \
-		if [ -f /usr/share/OVMF/OVMF_CODE.fd ]; then \
-			OVMF="/usr/share/OVMF/OVMF_CODE.fd"; \
-		elif [ -f /usr/share/ovmf/OVMF.fd ]; then \
-			OVMF="/usr/share/ovmf/OVMF.fd"; \
-		elif [ -f /usr/share/edk2-ovmf/x64/OVMF_CODE.fd ]; then \
-			OVMF="/usr/share/edk2-ovmf/x64/OVMF_CODE.fd"; \
-		elif [ -f /usr/share/qemu/ovmf-x86_64.bin ]; then \
-			OVMF="/usr/share/qemu/ovmf-x86_64.bin"; \
-		else \
-			echo "Error: OVMF UEFI firmware not found!"; \
-			echo "Install with:"; \
-			echo "  Ubuntu/Debian: sudo apt-get install ovmf"; \
-			echo "  Arch Linux: sudo pacman -S edk2-ovmf"; \
-			echo "  Fedora: sudo dnf install edk2-ovmf"; \
-			exit 1; \
-		fi; \
-		echo "Using OVMF firmware: $$OVMF"; \
-		echo "Display mode: $(QEMU_DISPLAY) (set QEMU_DISPLAY=gtk for graphical)"; \
-		qemu-system-x86_64 \
-			-drive if=pflash,format=raw,readonly=on,file=$$OVMF \
-			-drive format=raw,file=build/metalos.img \
-			-m 512M \
-			-serial stdio \
-			-display $(QEMU_DISPLAY) \
-			-net none \
-	'
-
-qemu-debug: image
-	@echo "Starting QEMU with debug output..."
-	@bash -c ' \
-		if [ -f /usr/share/OVMF/OVMF_CODE.fd ]; then \
-			OVMF="/usr/share/OVMF/OVMF_CODE.fd"; \
-		elif [ -f /usr/share/ovmf/OVMF.fd ]; then \
-			OVMF="/usr/share/ovmf/OVMF.fd"; \
-		elif [ -f /usr/share/edk2-ovmf/x64/OVMF_CODE.fd ]; then \
-			OVMF="/usr/share/edk2-ovmf/x64/OVMF_CODE.fd"; \
-		else \
-			echo "Error: OVMF UEFI firmware not found!"; \
-			exit 1; \
-		fi; \
-		qemu-system-x86_64 \
-			-drive if=pflash,format=raw,readonly=on,file=$$OVMF \
-			-drive format=raw,file=build/metalos.img \
-			-m 512M \
-			-serial stdio \
-			-display $(QEMU_DISPLAY) \
-			-net none \
-			-d int,cpu_reset \
-	'
-
-qemu-gdb: image
-	@echo "Starting QEMU with GDB server on port 1234..."
-	@bash -c ' \
-		if [ -f /usr/share/OVMF/OVMF_CODE.fd ]; then \
-			OVMF="/usr/share/OVMF/OVMF_CODE.fd"; \
-		elif [ -f /usr/share/ovmf/OVMF.fd ]; then \
-			OVMF="/usr/share/ovmf/OVMF.fd"; \
-		elif [ -f /usr/share/edk2-ovmf/x64/OVMF_CODE.fd ]; then \
-			OVMF="/usr/share/edk2-ovmf/x64/OVMF_CODE.fd"; \
-		else \
-			echo "Error: OVMF UEFI firmware not found!"; \
-			exit 1; \
-		fi; \
-		echo "QEMU will wait for GDB connection on localhost:1234"; \
-		echo "In another terminal, run: gdb kernel/metalos.bin"; \
-		echo "Then in GDB: target remote localhost:1234"; \
-		qemu-system-x86_64 \
-			-drive if=pflash,format=raw,readonly=on,file=$$OVMF \
-			-drive format=raw,file=build/metalos.img \
-			-m 512M \
-			-serial stdio \
-			-display $(QEMU_DISPLAY) \
-			-net none \
-			-s -S \
-	'
-
-# Quick UEFI test - boots to UEFI shell without OS (for verifying QEMU+OVMF setup)
-qemu-uefi-test:
-	@echo "Testing QEMU UEFI boot (no OS image)..."
-	@bash -c ' \
-		if [ -f /usr/share/OVMF/OVMF_CODE.fd ]; then \
-			OVMF="/usr/share/OVMF/OVMF_CODE.fd"; \
-		elif [ -f /usr/share/ovmf/OVMF.fd ]; then \
-			OVMF="/usr/share/ovmf/OVMF.fd"; \
-		elif [ -f /usr/share/edk2-ovmf/x64/OVMF_CODE.fd ]; then \
-			OVMF="/usr/share/edk2-ovmf/x64/OVMF_CODE.fd"; \
-		else \
-			echo "Error: OVMF UEFI firmware not found!"; \
-			exit 1; \
-		fi; \
-		echo "Using OVMF firmware: $$OVMF"; \
-		echo "This will boot to UEFI shell in nographic mode."; \
-		echo "You should see UEFI boot messages. Press Ctrl-A then X to exit QEMU."; \
-		qemu-system-x86_64 \
-			-drive if=pflash,format=raw,readonly=on,file=$$OVMF \
-			-m 512M \
-			-nographic \
-			-net none \
-	'
-
-clean:
-	@echo "Cleaning build artifacts..."
-	@cd bootloader && $(MAKE) clean
-	@cd kernel && $(MAKE) clean
-	@cd tests && $(MAKE) clean
-	@rm -rf build
-
-distclean: clean
-	@echo "Deep clean..."
-	@find . -name "*.o" -delete
-	@find . -name "*.d" -delete
diff --git a/README.md b/README.md
index 06883b4..439a12d 100644
--- a/README.md
+++ b/README.md
@@ -67,18 +67,18 @@ See [docs/ROADMAP.md](docs/ROADMAP.md) for detailed phase breakdown.
 
 ## Building
 
-MetalOS supports **multiple build systems** - choose what works best for you!
+MetalOS uses **CMake** as its build system for a modern, cross-platform build experience.
 
-### Quick Start (Make - Traditional)
+### Quick Start (CMake)
 
 ```bash
-make all      # Build bootloader, kernel, and userspace
-make test     # Run unit tests
-make qemu     # Test in QEMU with UEFI firmware
-make clean    # Clean build artifacts
+mkdir build && cd build
+cmake ..
+cmake --build .
+cmake --build . --target qemu
 ```
 
-### CMake + Ninja (Fast Modern Build)
+### Using Ninja (Faster Builds)
 
 ```bash
 mkdir build && cd build
@@ -103,19 +103,15 @@ The easiest way to build MetalOS with all dependencies:
 ```bash
 ./scripts/docker-build.sh              # Build Docker image
 ./scripts/docker-run.sh scripts/setup-deps.sh  # Setup dependencies
-./scripts/docker-run.sh make all       # Build everything
-./scripts/docker-run.sh make qemu      # Test in QEMU
+./scripts/docker-run.sh cmake --build build    # Build everything
 ```
 
-**See [docs/BUILD_SYSTEMS.md](docs/BUILD_SYSTEMS.md) for detailed comparison and usage of all build systems.**
-
 **QEMU UEFI Testing**:
 ```bash
-make qemu                      # Boot in QEMU with UEFI (headless)
-make qemu QEMU_DISPLAY=gtk     # Boot with graphical display
-make qemu-debug                # Boot with debug output
-make qemu-gdb                  # Boot with GDB debugging
-make qemu-uefi-test            # Test UEFI firmware setup
+cmake --build . --target qemu          # Boot in QEMU with UEFI (headless)
+cmake --build . --target qemu-debug    # Boot with debug output
+cmake --build . --target qemu-gdb      # Boot with GDB debugging
+cmake --build . --target qemu-uefi-test # Test UEFI firmware setup
 ```
 
 See [docs/BUILD.md](docs/BUILD.md) for detailed build instructions and [docs/TESTING.md](docs/TESTING.md) for testing guide.
diff --git a/bootloader/Makefile b/bootloader/Makefile
deleted file mode 100644
index e94363f..0000000
--- a/bootloader/Makefile
+++ /dev/null
@@ -1,55 +0,0 @@
-# MetalOS Bootloader Makefile
-# Builds UEFI bootloader (bootx64.efi)
-
-# Cross-compiler setup
-CC = gcc
-LD = ld
-OBJCOPY = objcopy
-
-# Directories
-SRC_DIR = src
-INC_DIR = include
-BUILD_DIR = build
-
-# Compiler flags for UEFI
-CFLAGS = -Wall -Wextra -Werror \
-         -ffreestanding -fno-stack-protector -fno-stack-check \
-         -fshort-wchar -mno-red-zone \
-         -I$(INC_DIR) \
-         -DEFI_FUNCTION_WRAPPER
-
-# Linker flags for UEFI
-LDFLAGS = -shared -Bsymbolic -nostdlib \
-          -znocombreloc -T uefi.lds
-
-# Source files
-SOURCES = $(wildcard $(SRC_DIR)/*.c)
-OBJECTS = $(patsubst $(SRC_DIR)/%.c,$(BUILD_DIR)/%.o,$(SOURCES))
-
-# Output
-TARGET = bootx64.efi
-
-.PHONY: all clean
-
-all: $(BUILD_DIR) $(TARGET)
-
-$(BUILD_DIR):
-	mkdir -p $(BUILD_DIR)
-
-# Compile C files
-$(BUILD_DIR)/%.o: $(SRC_DIR)/%.c
-	$(CC) $(CFLAGS) -c $< -o $@
-
-# Link and create EFI binary
-$(TARGET): $(OBJECTS)
-	$(LD) $(LDFLAGS) $(OBJECTS) -o $(BUILD_DIR)/bootx64.so
-	$(OBJCOPY) -j .text -j .sdata -j .data -j .dynamic \
-	           -j .dynsym -j .rel -j .rela -j .reloc \
-	           --target=efi-app-x86_64 \
-	           $(BUILD_DIR)/bootx64.so $@
-
-clean:
-	rm -rf $(BUILD_DIR) $(TARGET)
-
-# Note: This is a simplified Makefile
-# A real implementation would use gnu-efi or proper UEFI SDK
diff --git a/cmake-build/Makefile b/cmake-build/Makefile
deleted file mode 100644
index b6e39ff..0000000
--- a/cmake-build/Makefile
+++ /dev/null
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-
-# Object files
-C_OBJECTS = $(patsubst $(SRC_DIR)/%.c,$(BUILD_DIR)/%.o,$(C_SOURCES))
-ASM_OBJECTS = $(patsubst $(SRC_DIR)/%.asm,$(BUILD_DIR)/%.o,$(ASM_SOURCES))
-OBJECTS = $(C_OBJECTS) $(ASM_OBJECTS)
-
-# Output
-TARGET = metalos.bin
-
-.PHONY: all clean
-
-all: $(BUILD_DIR) $(TARGET)
-
-$(BUILD_DIR):
-	mkdir -p $(BUILD_DIR)
-	mkdir -p $(BUILD_DIR)/core
-	mkdir -p $(BUILD_DIR)/hal
-	mkdir -p $(BUILD_DIR)/drivers
-	mkdir -p $(BUILD_DIR)/syscall
-
-# Compile C files
-$(BUILD_DIR)/%.o: $(SRC_DIR)/%.c
-	@mkdir -p $(dir $@)
-	$(CC) $(CFLAGS) -c $< -o $@
-
-# Assemble ASM files
-$(BUILD_DIR)/%.o: $(SRC_DIR)/%.asm
-	@mkdir -p $(dir $@)
-	$(AS) $(ASFLAGS) $< -o $@
-
-# Link kernel
-$(TARGET): $(OBJECTS)
-	$(LD) $(LDFLAGS) $(OBJECTS) -o $@
-
-clean:
-	rm -rf $(BUILD_DIR) $(TARGET)
-
-# Print variables for debugging
-info:
-	@echo "C Sources: $(C_SOURCES)"
-	@echo "ASM Sources: $(ASM_SOURCES)"
-	@echo "Objects: $(OBJECTS)"
-	@echo "Compiler: $(CC)"
diff --git a/tests/Makefile b/tests/Makefile
deleted file mode 100644
index bb441e6..0000000
--- a/tests/Makefile
+++ /dev/null
@@ -1,64 +0,0 @@
-# MetalOS Test Suite Makefile
-
-CC = gcc
-CFLAGS = -Wall -Wextra -std=c11 -I../tests/include -I../kernel/include -I../bootloader/include
-LDFLAGS = 
-
-# Test source files
-TEST_SOURCES = $(wildcard unit/*.c)
-TEST_BINARIES = $(TEST_SOURCES:.c=)
-
-# Default target
-.PHONY: all
-all: $(TEST_BINARIES)
-
-# Build each test binary
-unit/%: unit/%.c include/test_framework.h
-	@echo "Building test: $@"
-	$(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
-
-# Run all tests
-.PHONY: test
-test: all
-	@echo ""
-	@echo "╔════════════════════════════════════════════╗"
-	@echo "║      Running MetalOS Test Suite           ║"
-	@echo "╚════════════════════════════════════════════╝"
-	@echo ""
-	@for test in $(TEST_BINARIES); do \
-		./$$test || exit 1; \
-	done
-	@echo ""
-	@echo "╔════════════════════════════════════════════╗"
-	@echo "║      All Test Suites Passed ✓              ║"
-	@echo "╚════════════════════════════════════════════╝"
-	@echo ""
-
-# Run tests with verbose output
-.PHONY: test-verbose
-test-verbose: all
-	@for test in $(TEST_BINARIES); do \
-		echo "Running $$test..."; \
-		./$$test -v; \
-		echo ""; \
-	done
-
-# Clean test binaries
-.PHONY: clean
-clean:
-	@echo "Cleaning test binaries..."
-	@rm -f $(TEST_BINARIES)
-	@rm -f unit/*.o
-	@echo "Clean complete"
-
-# Help target
-.PHONY: help
-help:
-	@echo "MetalOS Test Suite Makefile"
-	@echo ""
-	@echo "Targets:"
-	@echo "  all           - Build all test binaries"
-	@echo "  test          - Build and run all tests"
-	@echo "  test-verbose  - Run tests with verbose output"
-	@echo "  clean         - Remove test binaries"
-	@echo "  help          - Show this help message"

From f4a0b3299889ca629493c99e830c4e29d67df7a2 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sun, 28 Dec 2025 20:57:33 +0000
Subject: [PATCH 4/5] Update BUILD.md and BUILD_SYSTEMS.md to remove Makefile
 references

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>
---
 docs/BUILD.md         |  60 ++++++++++++-----------
 docs/BUILD_SYSTEMS.md | 109 ++++++++++++++----------------------------
 2 files changed, 67 insertions(+), 102 deletions(-)

diff --git a/docs/BUILD.md b/docs/BUILD.md
index 518ea52..19660e8 100644
--- a/docs/BUILD.md
+++ b/docs/BUILD.md
@@ -21,10 +21,12 @@ The easiest way to build MetalOS is using Docker, which provides a pre-configure
 ./scripts/docker-run.sh scripts/setup-deps.sh
 
 # 3. Build MetalOS
-./scripts/docker-run.sh make all
+mkdir build && cd build
+cmake ..
+cmake --build .
 
 # 4. Test in QEMU (headless mode)
-./scripts/docker-run.sh make qemu
+cmake --build . --target qemu
 
 # 5. Optional: Interactive shell in container
 ./scripts/docker-run.sh /bin/bash
@@ -33,7 +35,7 @@ The easiest way to build MetalOS is using Docker, which provides a pre-configure
 ### What's Included in Docker
 
 The Docker image includes:
-- **Build tools**: GCC, NASM, Make, CMake, Meson
+- **Build tools**: GCC, NASM, CMake, Meson
 - **QEMU**: For testing with UEFI firmware
 - **OVMF**: UEFI firmware for QEMU
 - **Dependency management**: Scripts to download AMD firmware, Mesa RADV, QT6
@@ -127,11 +129,15 @@ This produces `kernel/metalos.bin` - the kernel binary.
 ## Creating Bootable Image
 
 ```bash
-# From repository root
-make image
+# From repository root, if you haven't already
+mkdir build && cd build
+cmake ..
+
+# Create the bootable image
+cmake --build . --target image
 ```
 
-This creates `build/metalos.img` - a bootable disk image containing:
+This creates `build/build/metalos.img` - a bootable disk image containing:
 - EFI System Partition with bootloader
 - Kernel binary
 - Any required data files
@@ -146,41 +152,33 @@ Ensure QEMU and OVMF are installed:
 
 ```bash
 # Ubuntu/Debian
-sudo apt-get install qemu-system-x86 ovmf mtools
+sudo apt-get install qemu-system-x86 ovmf mtools cmake
 
 # Arch Linux
-sudo pacman -S qemu-full edk2-ovmf mtools
+sudo pacman -S qemu-full edk2-ovmf mtools cmake
 
 # Fedora
-sudo dnf install qemu-system-x86 edk2-ovmf mtools
+sudo dnf install qemu-system-x86 edk2-ovmf mtools cmake
 ```
 
 ### Boot MetalOS in QEMU
 
 ```bash
-make qemu
+cd build
+cmake --build . --target qemu
 ```
 
 This will:
-1. Build bootloader and kernel (or use placeholders if build fails)
+1. Build bootloader and kernel
 2. Create a bootable FAT32 disk image with UEFI boot structure
 3. Launch QEMU with OVMF UEFI firmware in headless mode
-4. Boot the system (will drop to UEFI shell until bootloader is complete)
-
-**Display Options**: By default, QEMU runs in headless mode (no graphics). To use graphical display:
-
-```bash
-# Use GTK display (if available)
-make qemu QEMU_DISPLAY=gtk
-
-# Use SDL display (if available)
-make qemu QEMU_DISPLAY=sdl
-```
+4. Boot the system
 
 ### Boot with Debug Output
 
 ```bash
-make qemu-debug
+cd build
+cmake --build . --target qemu-debug
 ```
 
 This includes CPU interrupt and reset debugging output.
@@ -191,7 +189,8 @@ For debugging with GDB:
 
 ```bash
 # Terminal 1 - Start QEMU with GDB server
-make qemu-gdb
+cd build
+cmake --build . --target qemu-gdb
 
 # Terminal 2 - Connect GDB
 gdb kernel/metalos.bin
@@ -206,7 +205,8 @@ QEMU will wait for GDB connection before starting execution.
 To verify QEMU and OVMF are properly installed without needing a bootable OS image:
 
 ```bash
-make qemu-uefi-test
+cd build
+cmake --build . --target qemu-uefi-test
 ```
 
 This boots directly to the UEFI shell, confirming your QEMU+OVMF setup works correctly.
@@ -292,10 +292,14 @@ ENABLE_SERIAL ?= 1
 
 ```bash
 # Clean all build artifacts
-make clean
+cd build
+cmake --build . --target clean
 
-# Clean everything including dependencies
-make distclean
+# Or remove the build directory entirely
+cd ..
+rm -rf build
+mkdir build && cd build
+cmake ..
 ```
 
 ## Troubleshooting
diff --git a/docs/BUILD_SYSTEMS.md b/docs/BUILD_SYSTEMS.md
index 33b9a3a..5cedd5f 100644
--- a/docs/BUILD_SYSTEMS.md
+++ b/docs/BUILD_SYSTEMS.md
@@ -1,21 +1,15 @@
 # MetalOS Build Systems Guide
 
-MetalOS supports multiple build systems to accommodate different developer preferences and workflows.
+MetalOS uses **CMake** as its primary build system, which can be used with different build backends for different workflows.
 
 ## Quick Start
 
-### Using Make (Traditional)
-```bash
-make all      # Build everything
-make qemu     # Test in QEMU
-make clean    # Clean build artifacts
-```
-
-### Using CMake + Make
+### Using CMake (Default)
 ```bash
 mkdir build && cd build
 cmake ..
 cmake --build .
+cmake --build . --target qemu  # Test in QEMU
 ```
 
 ### Using CMake + Ninja (Fastest)
@@ -23,6 +17,7 @@ cmake --build .
 mkdir build && cd build
 cmake -G Ninja ..
 ninja
+ninja qemu  # Test in QEMU
 ```
 
 ### Using Conan + CMake
@@ -35,89 +30,38 @@ cmake --build .
 
 ## Build System Comparison
 
-| Build System | Speed | Features | Best For |
-|--------------|-------|----------|----------|
-| **Make** | Medium | Simple, traditional | Quick builds, CI/CD |
-| **CMake** | Medium | Cross-platform, modern | Complex projects, IDEs |
+| Build Backend | Speed | Features | Best For |
+|---------------|-------|----------|----------|
+| **Make** (default) | Medium | Cross-platform, standard | General use, CI/CD |
 | **Ninja** | Fast | Parallel builds | Development, large projects |
 | **Conan** | Medium | Dependency management | Projects with external deps |
 
 ## Detailed Usage
 
-### 1. Make (Traditional Build System)
+### 1. CMake (Primary Build System)
 
-The original build system using GNU Make.
+CMake is the primary build system for MetalOS, providing cross-platform support and modern features.
 
 #### Build Commands
 ```bash
-# Build all components
-make all
-
-# Build individually
-make bootloader
-make kernel
-make test
-
-# Create bootable image
-make image
-
-# Run in QEMU
-make qemu                    # Headless mode
-make qemu QEMU_DISPLAY=gtk   # With GUI
-make qemu-debug              # With debug output
-make qemu-gdb                # With GDB server
-
-# Clean
-make clean       # Clean build artifacts
-make distclean   # Deep clean
-```
-
-#### Advantages
-- ✅ Simple and straightforward
-- ✅ No additional dependencies
-- ✅ Works on all Unix-like systems
-- ✅ Easy to understand and modify
-
-#### Disadvantages
-- ❌ Not cross-platform (Windows requires special setup)
-- ❌ Can be slower for large projects
-- ❌ Limited dependency tracking
-
----
-
-### 2. CMake (Modern Build Generator)
-
-CMake generates build files for various build systems (Make, Ninja, Visual Studio, etc.).
-
-#### Build Commands
-```bash
-# Configure (generates build files)
+# Configure and build
 mkdir build && cd build
 cmake ..
-
-# Configure with specific generator
-cmake -G "Unix Makefiles" ..
-cmake -G Ninja ..
-cmake -G "Visual Studio 17 2022" ..  # Windows
-
-# Configure with options
-cmake -DBUILD_BOOTLOADER=ON -DBUILD_KERNEL=ON -DBUILD_TESTS=ON ..
-cmake -DCMAKE_BUILD_TYPE=Debug ..
-cmake -DCMAKE_BUILD_TYPE=Release ..
-
-# Build
 cmake --build .
-cmake --build . --parallel 8  # Use 8 parallel jobs
 
 # Build specific targets
 cmake --build . --target bootloader_efi
 cmake --build . --target kernel_bin
 cmake --build . --target image
 
-# Run custom targets
-cmake --build . --target qemu
-cmake --build . --target qemu-debug
-cmake --build . --target qemu-gdb
+# Create bootable image
+make image
+
+# Run in QEMU
+cmake --build . --target qemu          # Headless mode
+cmake --build . --target qemu-debug    # With debug output
+cmake --build . --target qemu-gdb      # With GDB server
+cmake --build . --target qemu-uefi-test # Test UEFI setup
 
 # Test
 ctest
@@ -133,6 +77,23 @@ cmake --build . --target clean
 rm -rf build  # Complete clean
 ```
 
+#### Advantages
+- ✅ Cross-platform (Windows, Linux, macOS)
+- ✅ IDE integration (CLion, VSCode, Visual Studio)
+- ✅ Modern dependency management
+- ✅ Better parallel build support
+- ✅ Generates compile_commands.json for IDEs
+
+#### Disadvantages
+- ❌ Requires cmake installation
+- ❌ Slightly more complex setup
+
+---
+
+### 2. Ninja (Fast Build Backend)
+
+Ninja is a fast build backend that can be used with CMake for faster incremental builds.
+
 #### Advantages
 - ✅ Cross-platform (Windows, Linux, macOS)
 - ✅ IDE integration (CLion, Visual Studio, VS Code)

From 0a8ba00c2a5cdad1fd9947e508217adb177b818d Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sun, 28 Dec 2025 20:59:28 +0000
Subject: [PATCH 5/5] Fix documentation issues found in code review

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>
---
 docs/BUILD.md         | 2 +-
 docs/BUILD_SYSTEMS.md | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/BUILD.md b/docs/BUILD.md
index 19660e8..c3af994 100644
--- a/docs/BUILD.md
+++ b/docs/BUILD.md
@@ -137,7 +137,7 @@ cmake ..
 cmake --build . --target image
 ```
 
-This creates `build/build/metalos.img` - a bootable disk image containing:
+This creates the bootable disk image at `<build-directory>/build/metalos.img` (e.g., `build/build/metalos.img` if your build directory is named `build/`). The image contains:
 - EFI System Partition with bootloader
 - Kernel binary
 - Any required data files
diff --git a/docs/BUILD_SYSTEMS.md b/docs/BUILD_SYSTEMS.md
index 5cedd5f..961c213 100644
--- a/docs/BUILD_SYSTEMS.md
+++ b/docs/BUILD_SYSTEMS.md
@@ -55,7 +55,7 @@ cmake --build . --target kernel_bin
 cmake --build . --target image
 
 # Create bootable image
-make image
+cmake --build . --target image
 
 # Run in QEMU
 cmake --build . --target qemu          # Headless mode