77 lines
2 KiB
Makefile
77 lines
2 KiB
Makefile
# This is the name that our final kernel executable will have.
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# Change as needed.
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override KERNEL := kernel.elf
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# It is highly recommended to use a custom built cross toolchain to build a kernel.
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# We are only using "cc" as a placeholder here. It may work by using
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# the host system's toolchain, but this is not guaranteed.
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ifeq ($(origin CC), default)
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CC := cc
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endif
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# Likewise, "ld" here is just a placeholder and your mileage may vary if using the
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# host's "ld".
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ifeq ($(origin LD), default)
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LD := ld
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endif
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# User controllable CFLAGS.
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CFLAGS ?= -O2 -g -Wall -Wextra -Wpedantic -pipe
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# User controllable linker flags. We set none by default.
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LDFLAGS ?=
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# Internal C flags that should not be changed by the user.
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override INTERNALCFLAGS := \
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-I. \
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-std=c11 \
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-ffreestanding \
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-fno-stack-protector \
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-fno-stack-check \
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-fno-pic \
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-mabi=sysv \
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-mno-80387 \
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-mno-mmx \
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-mno-3dnow \
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-mno-sse \
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-mno-sse2 \
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-mno-red-zone \
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-mcmodel=kernel \
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-MMD
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# Internal linker flags that should not be changed by the user.
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override INTERNALLDFLAGS := \
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-Tlinker.ld \
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-nostdlib \
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-zmax-page-size=0x1000 \
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-static
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# Use find to glob all *.c files in the directory and extract the object names.
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override CFILES := $(shell find ./ -type f -name '*.c')
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override OBJ := $(CFILES:.c=.o)
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override HEADER_DEPS := $(CFILES:.c=.d)
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# Default target.
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.PHONY: all
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all: $(KERNEL)
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limine.h:
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curl https://raw.githubusercontent.com/limine-bootloader/limine/trunk/limine.h -o $@
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# Link rules for the final kernel executable.
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$(KERNEL): $(OBJ)
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$(LD) $(OBJ) $(LDFLAGS) $(INTERNALLDFLAGS) -o $@
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# Compilation rules for *.c files.
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-include $(HEADER_DEPS)
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%.o: %.c limine.h
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$(CC) $(CFLAGS) $(INTERNALCFLAGS) -c $< -o $@
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# Remove object files and the final executable.
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.PHONY: clean
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clean:
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rm -rf $(KERNEL) $(OBJ) $(HEADER_DEPS)
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.PHONY: distclean
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distclean: clean
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rm -f limine.h
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