132 lines
3.0 KiB
Makefile
132 lines
3.0 KiB
Makefile
# loader and kmain must be the only object files placed in the root directory.
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OBJ = loader.o kmain.o
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# Configuration directory that contains files for building the project and
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# testing it.
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CONFIG_DIR := config/
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# Compiler settings
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CC = i686-elf-gcc
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CCFLAGS = -ffreestanding -mno-red-zone -c
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CCFLAGS += -Wall -Wextra -Werror -pedantic
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# Linker settings
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LD = i686-elf-gcc
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LDFLAGS = -T $(CONFIG_DIR)/link.ld -nostdlib -ffreestanding -lgcc
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# Assembler settings
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AS = i686-elf-as
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ASFLAGS =
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# Libraries directory. Normally I don't want to include the library headers
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# in kmain, but given the fact that in the module interfaces there are includes
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# from lib, they must be resolved when linking kmain.
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LIB_DIR = lib/
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# Module directories are located in modules/
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# The interfaces are placed in module/include/ and the module objects are
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# located in each module under mobj/.
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MODULES_ROOT_DIR := modules/
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MODULE_DIR = $(wildcard $(MODULES_ROOT_DIR)/*)
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MODULE_INC_DIR = $(MODULES_ROOT_DIR)/include $(LIB_DIR)/include
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# Locate the mobj/ directories and their contents.
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MODULE_OBJ_DIR = mobj/
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MODULE_OBJ = $(foreach TMP, $(MODULE_DIR), $(wildcard $(TMP)/$(MODULE_OBJ_DIR)/*.o))
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# Exclude modules/include from module directories list.
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MODULE_DIR := $(filter-out $(MODULE_INC_DIR), $(MODULE_DIR))
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# Include flags
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INCFLAGS = $(foreach TMP, $(MODULE_INC_DIR), -I$(TMP))
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# Library flags
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LIB_SO_DIR := lib/so
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LIBFLAGS = $(foreach TMP, $(LIB_SO_DIR), -L$(TMP))
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LIBS = -lklib
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.PHONY: all clean module_all
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all: lib_all | module_all kernel.elf
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# module_all - Recursively build all modules.
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module_all:
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@$(call print_banner, "Building modules")
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@$(MAKE) -C $(MODULES_ROOT_DIR)
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@echo
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# lib_all - Recursively build the library
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lib_all:
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@$(call print_banner, "Building the library")
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@$(MAKE) -C $(LIB_DIR)
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@echo
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# kernel.elf - Link all root objects and module objects to create the
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# kernel.elf executable
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kernel.elf: $(OBJ)
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@$(call print_banner, "Building the kernel")
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$(LD) $(OBJ) $(MODULE_OBJ) -o kernel.elf $(LIBFLAGS) $(LIBS) $(LDFLAGS)
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# os.iso - Create the OS image and place the kernel fiel in GRUB directory.
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os.iso: kernel.elf
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cp kernel.elf iso/boot/kernel.elf
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genisoimage -R \
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-b boot/grub/stage2_eltorito \
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-no-emul-boot \
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-boot-load-size 4 \
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-A os \
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-input-charset utf8 \
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-quiet \
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-boot-info-table \
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-o os.iso \
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iso
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# run - Run the emulator using the config file.
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BOCHS_CONFIG := $(CONFIG_DIR)/bochsrc.txt
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run: os.iso
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bochs -f $(BOCHS_CONFIG) -q
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%.o: %.c
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$(CC) $< -o $@ $(CCFLAGS) $(INCFLAGS)
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%.o: %.s
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$(AS) $< -o $@ $(ASFLAGS)
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clean: mclean lclean
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@$(call print_banner, "Cleaning root directory")
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@$(RM) *.o kernel.elf os.iso bochslog.txt iso/boot/kernel.elf
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mclean:
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@$(call print_banner, "Cleaning the modules")
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$(MAKE) -C $(MODULES_ROOT_DIR) clean
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lclean:
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@$(call print_banner, "Cleaning the library")
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$(MAKE) -C $(LIB_DIR) clean
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# Functions
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define print_banner
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@echo
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@echo "*************** $(1) ***************"
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@echo
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endef
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