Bad makefile

Makefile

@@ -1,4 +1,6 @@
-TOOLPREFIX = riscv-none-elf
+# TOOLPREFIX = riscv64-linux-gnu
+# TOOLPREFIX = toolchain/xpack-riscv-none-elf-gcc-14.2.0-3/bin/riscv-none-elf
+TOOLPREFIX = toolchain/gcc/bin/riscv-none-elf
 
 CC = $(TOOLPREFIX)-gcc
 AS = $(TOOLPREFIX)-as
@@ -17,25 +19,32 @@ CFLAGS += -mcmodel=medany
 CFLAGS += -march=rv64gc -mabi=lp64
 CFLAGS += -ffreestanding -fno-common -nostdlib -mno-relax
 
-CFLAGS += -I.
-CFLAGS += -Ilib
-CFLAGS += -Ikern
-
 CFLAGS += -fno-stack-protector # Prevents code that needs libc / runtime support
 CFLAGS += -MD # Generate header dependency files (.d)
 CFLAGS += -fno-pie -no-pie # Fixed address linking
 CFLAGS += -ggdb -gdwarf-2 # GDB debug info
 CFLAGS += -fno-omit-frame-pointer # More reliable backtraces in GDB
 
+KCFLAGS += $(CGFLAGS)
+KCFLAGS += -DNEPTUNE_KERNEL
+KCFLAGS += -Ikern
+KCFLAGS += -Ikern/libkern
+KCFLAGS += -I.
+
+CFLAGS += -I.
+CFLAGS += -Ilib
+
 all: kernel.elf
 
-kernel.elf: entry.o start.o lib/string.o lib/proc.o lib/proc.o lib/uart.o lib/panic.o kern/kalloc.o lib/memory.o kern/ispinlock.o lib/spinlock.o
+main: main.o
+
+kernel.elf: entry.o start.o kern/libkern/string.o kern/libkern/proc.o kern/libkern/uart.o kern/libkern/panic.o kern/kalloc.o kern/libkern/memory.o kern/ispinlock.o kern/libkern/spinlock.o kern/libkern/string.o kern/libkern/mini-printf.o
 	@echo LD $@
 	@$(LD) $(LDFLAGS) -o $@ $^
 
 %.o: %.c
 	@echo CC $@
-	@$(CC) $(CFLAGS) -nostdinc -I. -c $< -o $@
+	@$(CC) $(KCFLAGS) -nostdinc -I. -c $< -o $@
 
 %.o: %.S
 	@echo AS $@
@@ -47,7 +56,62 @@ qemu: kernel.elf
 
 clean:
 	rm -f *.o *.elf *.d lib/*.o lib/*.d
+	fd -e o -x rm # TODO: Should only depend on posix
 
 -include *.d
 
-.PHONY: all
+# --------------------------------------------------------------------
+# Toolchain configuration
+# --------------------------------------------------------------------
+
+TOOLCHAIN_DIR := toolchain
+
+# Versions
+QEMU_VER := 8.2.6-1
+GCC_VER  := 14.2.0-3
+
+# Filenames
+QEMU_TARBALL := xpack-qemu-riscv-$(QEMU_VER)-linux-arm.tar.gz
+GCC_TARBALL  := xpack-riscv-none-elf-gcc-$(GCC_VER)-linux-arm.tar.gz
+
+# URLs
+QEMU_URL := https://github.com/xpack-dev-tools/qemu-riscv-xpack/releases/download/v$(QEMU_VER)/$(QEMU_TARBALL)
+GCC_URL  := https://github.com/xpack-dev-tools/riscv-none-elf-gcc-xpack/releases/download/v$(GCC_VER)/$(GCC_TARBALL)
+
+# Paths
+QEMU_TARPATH := toolchain/xpack-qemu-riscv-8.2.6-1-linux-arm.tar.gz
+GCC_TARPATH := toolchain/xpack-riscv-none-elf-gcc-14.2.0-3-linux-arm.tar.gz
+
+# Extracted directories
+QEMU_DIR := $(TOOLCHAIN_DIR)/xpack-qemu-riscv-$(QEMU_VER)
+GCC_DIR  := $(TOOLCHAIN_DIR)/xpack-riscv-none-elf-gcc-$(GCC_VER)
+
+# Symlink targets
+QEMU_SYM_DIR := xpack-qemu-riscv-$(QEMU_VER)
+GCC_SYM_DIR  := xpack-riscv-none-elf-gcc-$(GCC_VER)
+
+# Final symlink/alias
+GCC_ALIAS := gcc
+QEMU_ALIAS := qemu
+
+QEMU_TARPATH:
+	curl -# -L -o $@ $(QEMU_URL)
+
+GCC_TARPATH:
+	curl -# -L -o $@ $(GCC_URL)
+
+extractions:
+	cd toolchain && tar xf $(QEMU_TARBALL)
+	cd toolchain && tar xf $(GCC_TARBALL)
+
+toolchain: $(QEMU_TARPATH) $(GCC_TARPATH)
+	mkdir -p toolchain
+	cd toolchain && tar xf $(QEMU_TARBALL)
+	cd toolchain && tar xf $(GCC_TARBALL)
+	cd $(TOOLCHAIN_DIR) && ln -sfn $(QEMU_SYM_DIR) $(QEMU_ALIAS)
+	cd $(TOOLCHAIN_DIR) && ln -sfn $(GCC_SYM_DIR)  $(GCC_ALIAS)
+
+distclean: clean
+	rm -rf $(TOOLCHAIN_DIR)
+
+.PHONY: all toolchain