mirror of
https://github.com/Zeal-Operating-System/ZealOS.git
synced 2024-12-25 23:10:32 +00:00
130 lines
3.5 KiB
Makefile
130 lines
3.5 KiB
Makefile
# Nuke built-in rules and variables.
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override MAKEFLAGS += -rR
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# This is the name that our final executable will have.
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# Change as needed.
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override OUTPUT := kernel
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# Convenience macro to reliably declare user overridable variables.
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define DEFAULT_VAR =
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ifeq ($(origin $1),default)
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override $(1) := $(2)
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endif
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ifeq ($(origin $1),undefined)
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override $(1) := $(2)
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endif
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endef
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# User controllable C compiler command.
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override DEFAULT_KCC := cc
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$(eval $(call DEFAULT_VAR,KCC,$(DEFAULT_KCC)))
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# User controllable linker command.
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override DEFAULT_KLD := ld
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$(eval $(call DEFAULT_VAR,KLD,$(DEFAULT_KLD)))
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# User controllable C flags.
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override DEFAULT_KCFLAGS := -g -O2 -pipe
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$(eval $(call DEFAULT_VAR,KCFLAGS,$(DEFAULT_KCFLAGS)))
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# User controllable C preprocessor flags. We set none by default.
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override DEFAULT_KCPPFLAGS :=
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$(eval $(call DEFAULT_VAR,KCPPFLAGS,$(DEFAULT_KCPPFLAGS)))
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# User controllable nasm flags.
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override DEFAULT_KNASMFLAGS := -F dwarf -g
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$(eval $(call DEFAULT_VAR,KNASMFLAGS,$(DEFAULT_KNASMFLAGS)))
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# User controllable linker flags. We set none by default.
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override DEFAULT_KLDFLAGS :=
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$(eval $(call DEFAULT_VAR,KLDFLAGS,$(DEFAULT_KLDFLAGS)))
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# Internal C flags that should not be changed by the user.
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override KCFLAGS += \
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-Wall \
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-Wextra \
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-std=gnu11 \
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-ffreestanding \
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-fno-stack-protector \
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-fno-stack-check \
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-fno-lto \
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-fno-PIC \
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-ffunction-sections \
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-fdata-sections \
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-m64 \
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-march=x86-64 \
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-mno-80387 \
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-mno-mmx \
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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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# Internal C preprocessor flags that should not be changed by the user.
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override KCPPFLAGS := \
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-I src \
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-I src/lib \
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$(KCPPFLAGS) \
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-MMD \
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-MP
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# Internal nasm flags that should not be changed by the user.
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override KNASMFLAGS += \
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-Wall \
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-f elf64
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# Internal linker flags that should not be changed by the user.
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override KLDFLAGS += \
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-m elf_x86_64 \
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-nostdlib \
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-static \
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-z max-page-size=0x1000 \
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-gc-sections \
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-T linker.ld
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# Use "find" to glob all *.c, *.S, and *.asm files in the tree and obtain the
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# object and header dependency file names.
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override CFILES := $(shell cd src && find -L * -type f -name '*.c' | LC_ALL=C sort)
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override ASFILES := $(shell cd src && find -L * -type f -name '*.S' | LC_ALL=C sort)
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override NASMFILES := $(shell cd src && find -L * -type f -name '*.asm' | LC_ALL=C sort)
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override OBJ := $(addprefix obj/,$(CFILES:.c=.c.o) $(ASFILES:.S=.S.o) $(NASMFILES:.asm=.asm.o))
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override HEADER_DEPS := $(addprefix obj/,$(CFILES:.c=.c.d) $(ASFILES:.S=.S.d))
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# Default target.
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.PHONY: all
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all: bin/$(OUTPUT)
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src/limine.h:
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curl -Lo $@ https://github.com/limine-bootloader/limine/raw/trunk/limine.h || cp ../build/limine/limine.h src/limine.h || echo "ERROR"
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# Link rules for the final executable.
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bin/$(OUTPUT): GNUmakefile linker.ld $(OBJ)
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mkdir -p "$$(dirname $@)"
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$(KLD) $(OBJ) $(KLDFLAGS) -o $@
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# Include header dependencies.
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-include $(HEADER_DEPS)
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# Compilation rules for *.c files.
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obj/%.c.o: src/%.c GNUmakefile src/limine.h
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mkdir -p "$$(dirname $@)"
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$(KCC) $(KCFLAGS) $(KCPPFLAGS) -c $< -o $@
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# Compilation rules for *.S files.
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obj/%.S.o: src/%.S GNUmakefile src/limine.h
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mkdir -p "$$(dirname $@)"
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$(KCC) $(KCFLAGS) $(KCPPFLAGS) -c $< -o $@
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# Compilation rules for *.asm (nasm) files.
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obj/%.asm.o: src/%.asm GNUmakefile
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mkdir -p "$$(dirname $@)"
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nasm $(KNASMFLAGS) $< -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 bin obj
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.PHONY: distclean
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distclean: clean
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rm -f src/limine.h
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