Refactoring of makefiles is here. Looks like a bit less of a mess,

thankfully.

Also now using `ld` and `as` instead of `gcc` for everything. Seems to
work OK for now - but may bite on the ass later. We'll see!

Makefile

@@ -1,57 +1,66 @@
-# Makefile
+###CONFIGURATION
+ARCH    := i686
+CROSS   := $(ARCH)-elf-
+AS      := $(CROSS)as
+CC      := $(CROSS)gcc
+LD      := $(CROSS)ld
+QEMU	:= qemu-system-i386
 
-#Some definitions
-SRC_DIR = src
-BUILD_DIR = build
 
-LOADER_DIR = module_bootloader
+CFLAGS  := -ffreestanding -nostdlib -lgcc -g
-LOADER_NAME = uOS.iso
+LDFLAGS := -T linker.ld -nostdlib
-LOADER_IMG = $(BUILD_DIR)/$(LOADER_NAME)
 
-KERNEL_MAIN = $(SRC_DIR)/main.c
+SRC_DIR := src
-KERNEL_MAIN_OBJ = $(BUILD_DIR)/main.o
+OBJ_DIR := obj
+BIN_DIR := build
+LOADER_DIR := module_bootloader
 
-ENTRY_ASM = $(SRC_DIR)/start.s
+SOURCES := $(wildcard $(SRC_DIR)/*.c) $(wildcard $(SRC_DIR)/*.s)
-ENTRY_ASM_OBJ = $(BUILD_DIR)/start.o
+OBJECTS := $(patsubst $(SRC_DIR)/%, $(OBJ_DIR)/%, $(SOURCES:.c=.o))
+OBJECTS := $(OBJECTS:.s=.o)
 
-LINKING_RECIPE = $(SRC_DIR)/linker.ld
 
-KERNEL_IMG = $(BUILD_DIR)/ukern.elf
+OUT_ELF := $(BIN_DIR)/ukern.elf
+OUT_ISO := $(BIN_DIR)/uOS.iso
 
-QEMU = qemu-system-i386
+###RULES
-GCC = i686-elf-gcc
 
-#Actual recipe
+.PHONY: all
-all: $(KERNEL_IMG)
+all: $(OUT_ELF)
 
-$(BUILD_DIR):
+#Build Targets
-	mkdir -p $(BUILD_DIR)
+$(OUT_ELF): $(OBJECTS)
+	@mkdir -p $(BIN_DIR)
+	$(LD) $(LDFLAGS) -o $@ $^
 
-$(KERNEL_MAIN_OBJ):
+$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
-	$(GCC) -std=gnu99 -ffreestanding -g -c $(KERNEL_MAIN) -o $(BUILD_DIR)/main.o
+	@mkdir -p $(dir $@)
+	$(CC) $(CFLAGS) -c $< -o $@
 
-$(ENTRY_ASM_OBJ):
+$(OBJ_DIR)/%.o: $(SRC_DIR)/%.s
-	$(GCC) -std=gnu99 -ffreestanding -g -c $(ENTRY_ASM) -o $(ENTRY_ASM_OBJ)
+	@mkdir -p $(dir $@)
+	$(AS) $< -o $@
 
-#now kith (link)
+#Related targets
-$(KERNEL_IMG): $(KERNEL_MAIN_OBJ) $(ENTRY_ASM_OBJ)
-	$(GCC) -ffreestanding -nostdlib -g -T $(LINKING_RECIPE) $(ENTRY_ASM_OBJ) $(KERNEL_MAIN_OBJ) -o $(KERNEL_IMG) -lgcc
 
-run: all
-	$(QEMU) -kernel $(KERNEL_IMG)
 
-$(LOADER_IMG): $(KERNEL_IMG)
+$(OUT_ISO): $(OUT_ELF)
-	cp $(KERNEL_IMG) $(LOADER_DIR)/src/boot/; \
+	@cp $(OUT_ELF) $(LOADER_DIR)/src/boot/
-	cd $(LOADER_DIR);	\
+	@$(MAKE) -C $(LOADER_DIR) all
-	make all;			\
+	@cp $(LOADER_DIR)/$(OUT_ISO) $(BIN_DIR)/
-	cd ..;				\
-	cp $(LOADER_DIR)/$(LOADER_IMG) $(BUILD_DIR)/
-
-iso: $(LOADER_IMG)
-
-run_iso: iso
-	$(QEMU) -cdrom $(LOADER_IMG)
 
+#Utility
+.PHONY: clean
 clean:
-	rm -rf $(BUILD_DIR)/* 
+	rm -rf $(OBJ_DIR) $(BIN_DIR)i
 
+.PHONY: iso
+iso: $(OUT_ISO)
+
+.PHONY: run
+run:
+	$(QEMU) -kernel $(OUT_ELF)
+
+.PHONY: run_iso
+run_iso:
+	$(QEMU) -cdrom $(OUT_ISO)

module_bootloader/Makefile

@@ -7,3 +7,7 @@ BUILD_DIR = build
 
 all: 
 	grub-mkrescue -o $(BUILD_DIR)/uOS.iso $(SRC_DIR)
+
+.PHONY: clean
+clean:
+	rm $(BUILD_DIR)/*