Makefile

## Project directory (portable — never hardcode absolute paths)
PROJECT_DIR := $(CURDIR)

## ── Toolchain ──────────────────────────────────────────────────────────────
CARGO        := cargo
QEMU_AARCH64 := qemu-system-aarch64
QEMU_X86     := qemu-system-x86_64

## ── AArch64 build output ──────────────────────────────────────────────────
KERNEL_AARCH64 := $(PROJECT_DIR)/target/aarch64-unknown-none/release/toubkal_os
QEMU_FLAGS_AARCH64 := \
    -M virt \
    -cpu cortex-a72 \
    -m 2G \
    -drive file=$(PROJECT_DIR)/drive_aarch64.img,format=raw,if=none,id=hd0 \
    -device virtio-blk-device,drive=hd0 \
    -netdev user,id=n0 -device virtio-net-device,netdev=n0

## ── x86_64 build output ───────────────────────────────────────────────────
KERNEL_X86 := $(PROJECT_DIR)/target/x86_64-unknown-none/release/toubkal_os
QEMU_FLAGS_X86 := \
    -M q35 \
    -m 2G \
    -drive file=$(PROJECT_DIR)/drive_x86_64.img,format=raw,if=virtio \
    -netdev user,id=n0 \
    -device virtio-net-pci,netdev=n0

## ── Default ───────────────────────────────────────────────────────────────
.DEFAULT_GOAL := help

.PHONY: help build build-aarch64 build-x86 \
        run run-serial run-gui \
        run-x86 run-aarch64 \
        drive_aarch64.img drive_x86_64.img fmt check clean

help:
	@echo ""
	@echo "  ToubkalOS — Build System"
	@echo ""
	@echo "  Targets (AArch64 — default):"
	@echo "    make build         Build the AArch64 kernel (release)"
	@echo "    make run           Run AArch64 kernel in QEMU (serial mode)"
	@echo "    make run-gui       Run AArch64 kernel in QEMU (GUI mode)"
	@echo ""
	@echo "  Targets (x86_64):"
	@echo "    make build-x86     Build the x86_64 kernel"
	@echo "    make run-x86       Run x86_64 kernel in QEMU"
	@echo ""
	@echo "  Utilities:"
	@echo "    make fmt           Format source code (cargo fmt)"
	@echo "    make check         Cargo check + clippy warnings"
	@echo "    make drive.img     Create a blank 64 MB FAT32 disk image"
	@echo "    make clean         Remove build artifacts and disk image"
	@echo ""

## ── Build ─────────────────────────────────────────────────────────────────

build: build-aarch64

build-aarch64:
	@echo "[build] Compiling ToubkalOS for AArch64..."
	$(CARGO) build --release --target aarch64-unknown-none

build-x86:
	@echo "[build] Compiling ToubkalOS for x86_64..."
	$(CARGO) build --release --target x86_64-unknown-none

## ── Disk image ────────────────────────────────────────────────────────────
## Create only if the file does not already exist.

build-hd-aarch64:
	@echo "[disk] Re-creating 512 MB drive_aarch64.img..."
	@rm -f drive_aarch64.img
	@dd if=/dev/zero of=drive_aarch64.img bs=1M count=512 2>/dev/null
	@echo "[disk] Formatting as partitionless FAT32 (4KB clusters)..."
	@if [ "$$(uname)" = "Darwin" ]; then \
	  DISK=$$(hdiutil attach -nomount drive_aarch64.img | head -n 1 | awk '{print $$1}'); \
	  newfs_msdos -F 32 -c 8 -v TOUBKAL $$DISK; \
	  hdiutil detach $$DISK; \
	else \
	  mkfs.fat -I -F 32 -s 8 -n TOUBKAL drive_aarch64.img; \
	fi

drive_aarch64.img:
	@if [ ! -f $@ ]; then \
	  $(MAKE) build-hd-aarch64; \
	fi

drive_x86_64.img:
	@if [ ! -f $@ ]; then \
	  echo "[disk] Creating 64 MB $@..."; \
	  dd if=/dev/zero of=$@ bs=1M count=64 2>/dev/null; \
	  echo "[disk] Formatting as FAT32..."; \
	  if [ "$$(uname)" = "Darwin" ]; then \
	    DISK=$$(hdiutil attach -nomount $@ | head -n 1 | awk '{print $$1}'); \
	    newfs_msdos -F 32 -v TOUBKAL $$DISK; \
	    hdiutil detach $$DISK; \
	  elif command -v mkfs.fat >/dev/null 2>&1; then \
	    mkfs.fat -F 32 -n TOUBKAL $@; \
	  fi; \
	fi

## ── Run (AArch64) ─────────────────────────────────────────────────────────

run-serial: build-aarch64 drive_aarch64.img
	@echo "[run] Starting AArch64 in serial mode (Ctrl+A then X to quit)..."
	-@killall qemu-system-aarch64 2>/dev/null || true
	$(QEMU_AARCH64) $(QEMU_FLAGS_AARCH64) -kernel $(KERNEL_AARCH64) -nographic

run-gui: build-aarch64 drive_aarch64.img
	@echo "[run] Starting AArch64 in GUI mode..."
	-@killall qemu-system-aarch64 2>/dev/null || true
	$(QEMU_AARCH64) $(QEMU_FLAGS_AARCH64) \
	    -kernel $(KERNEL_AARCH64) \
	    -device virtio-gpu-device \
	    -device virtio-keyboard-device \
	    -device virtio-tablet-device \
	    -display default \
	    -serial stdio

run: run-serial
run-aarch64: run-serial

## ── Run (x86_64) ──────────────────────────────────────────────────────────

run-x86: build-x86 drive_x86_64.img
	@echo "[run] Starting x86_64 in serial mode (Ctrl+A then X to quit)..."
	-@killall qemu-system-x86_64 2>/dev/null || true
	$(QEMU_X86) $(QEMU_FLAGS_X86) \
	    -device loader,file=$(KERNEL_X86),cpu-num=0 \
	    -nographic

run-gui-x86: build-x86 drive_x86_64.img
	@echo "[run] Starting x86_64 in GUI mode..."
	-@killall qemu-system-x86_64 2>/dev/null || true
	$(QEMU_X86) $(QEMU_FLAGS_X86) \
	    -device loader,file=$(KERNEL_X86),cpu-num=0 \
	    -device virtio-gpu-pci \
	    -device virtio-keyboard-pci \
	    -device virtio-tablet-pci \
	    -display default \
	    -serial stdio

## ── Developer utilities ───────────────────────────────────────────────────

fmt:
	$(CARGO) fmt --all

check:
	$(CARGO) check --target aarch64-unknown-none
	$(CARGO) clippy --target aarch64-unknown-none -- -D warnings

## ── Clean ─────────────────────────────────────────────────────────────────

clean:
	$(CARGO) clean
	rm -f drive_aarch64.img drive_x86_64.img serial.log