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Makefile
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Makefile
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SHELL := /bin/bash
srcdir := .
objdir := .
.SUFFIXES:
.SUFFIXES: .c .s .o
DESTDIR :=
CC := gcc
LD := ld
NASM := nasm
CPP := cpp
# Unsure if there is a cleaner way to do this
SYSINCLUDE := $(shell $(CPP) -v /dev/null -o /dev/null 2>&1 | grep '^ .*gcc/.*include$$' | tr -d ' ')
CPPFLAGS := -isystem $(srcdir)/include -I.
CPPFLAGS += -isystem "$(SYSINCLUDE)"
CPPFLAGS += -MD -MP
APP_CPPFLAGS := \
-isystem ../fail-libc/include \
-nostdinc \
-nostdlib \
-ggdb3 \
-O0 \
-fno-builtin
CFLAGS := \
-ggdb3 \
-std=c99 \
-Wpedantic \
-Wall \
-Wextra \
-Wwrite-strings \
-Wno-packed-bitfield-compat \
-Wformat=2 \
-Wformat-overflow=2 \
-Wno-sign-compare \
-Wno-misleading-indentation \
-Wno-unused-parameter \
-Wmissing-field-initializers \
-fno-asynchronous-unwind-tables \
-fdiagnostics-color=always \
-fdiagnostics-color \
-fno-pic \
-mcmodel=large \
-mno-red-zone \
-O0
# Uncomment this for gcc analyzer
# CFLAGS += -fanalyzer -fanalyzer-verbosity=2 -fanalyzer-transitivity -fanalyzer-checker=taint
CFLAGS += -nostdlib -nostdinc -ffreestanding
CFLAGS +=
#-Wno-unused-but-set-variable \
#-mno-sse3 \
# -mno-sse2 \
#-mno-sse \
#-mno-mmx \
#-mfpmath=387 \
LDFLAGS := --build-id=none -nostdlib --check-sections -N -g
APP_LDFLAGS := --build-id=none -nostdlib --check-sections -N -g
NASMFLAGS := -f elf64 -g -w+all
HOST_CPPFLAGS :=
HOST_CPPFLAGS += -MMD -MP -iquote $(srcdir)/include
HOST_CFLAGS := -std=c99 -pedantic -Wall -Wextra
HOST_LDFLAGS :=
# Add to this to enable other features, as below
WITH_RAMDISK := 1
WITH_RAMFS := 1
WITH_SERIAL := 1
WITH_PCI := 1
WITH_FAILFS := 1
WITH_IDE := 1
WITH_ACPI := 1
WITH_NET := 1
RCOBJS := cpu.o frame.o mem.o init.o klibc.o dev.o \
page.o proc.o syscall.o file.o block.o
ifdef WITH_NET
RCOBJS += net.o unix.o
CFLAGS += -DWANT_NET
ifdef WITH_IP
RCOBJS += ip.o
CFLAGS += -DWANT_IP
ifneq ($(and $(WITH_ARP),$(WITH_ETH)),)
RCOBJS += arp.o
CFLAGS += -DWANT_ARP
endif
endif
ifdef WITH_ETH
RCOBJS += eth.o
CFLAGS += -DWANT_ETH
endif
endif
ifdef WITH_RAMDISK
RCOBJS += ram.o
CFLAGS += -DWANT_RAMDISK
endif
ifdef WITH_VGA
CFLAGS += -DWANT_VGA
endif
ifdef WITH_SERIAL
CFLAGS += -DWANT_SERIAL
endif
ifdef WITH_ACPI
RCOBJS += acpi.o
CFLAGS += -DWANT_ACPI
endif
ifdef WITH_PCI
RCOBJS += pci.o
CFLAGS += -DWANT_PCI
ifdef WITH_IDE
RCOBJS += ide.o
CFLAGS += -DWANT_IDE
endif
ifdef WITH_PCNET
RCOBJS += pcnet.o
CFLAGS += -DWANT_PCNET
endif
ifdef WITH_AHCI
RCOBJS += ahci.o
CFLAGS += -DWANT_AHCI
endif
endif
ifdef WITH_RAMFS
RCOBJS += ramfs.o
CFLAGS += -DWANT_RAMFS
endif
ifdef WITH_FAILFS
RCOBJS += failfs.o
CFLAGS += -DWANT_FAILFS
endif
ifdef WITH_KEYBOARD
CFLAGS += -DWANT_KEYBOARD
endif
CSRCS := $(RCOBJS:.o=.c)
COBJS := $(addprefix $(objdir)/obj/,$(RCOBJS))
CSRCS := $(addprefix $(srcdir)/src/,$(CSRCS))
ASMOBJS := mboot.o mboot_hdr.o intr.o
ASMOBJS := $(addprefix $(objdir)/obj/,$(ASMOBJS))
KERNEL := $(objdir)/kernel
HOST_COBJS := mkfs.failfs.o
HOST_CSRCS := $(HOST_COBJS:.o=.c)
HOST_UTILS := $(HOST_COBJS:.o=)
HOST_COBJS := $(addprefix $(objdir)/obj/,$(HOST_COBJS))
HOST_CSRCS := $(addprefix $(srcdir)/src/,$(HOST_CSRCS))
HOST_UTILS := $(addprefix $(objdir)/bin/,$(HOST_UTILS))
.PHONY: all clean
all: .d tags $(KERNEL) $(KERNEL).small $(HOST_UTILS)
dump:
@echo "COBJS=$(COBJS)"
@echo "CSRCS=$(CSRCS)"
@echo "RAW_CSRCS=$(RAW_CSRCS)"
@echo "DEPS=$(addprefix $(objdir)/.d/,$(notdir $(COBJS:%.o=%.d)))"
.d:
@mkdir -p .d 2>/dev/null
tags: $(CSRCS)
@ctags -R .
# this requires 'fail-shell' to be installed nearby which is hacky
$(objdir)/native.bin/%.o: ../fail-shell/obj/%.o
cp ../fail-shell/obj/$(@F) $@
$(objdir)/native.bin/%: $(objdir)/native.bin/%.o
$(LD) $(APP_LDFLAGS) -T$(srcdir)/src/fail-sh.ld $< ../fail-libc/lib/crt1.o ../fail-libc/lib/libc.a -o $@
@strip --strip-unneeded $@
@strip -R .comment $@
@strip -R .note.gnu.build-id $@
@strip -R .eh_frame_hdr $@
$(objdir)/native.bin/%.h: $(objdir)/native.bin/%
xxd -i $< > $@
sed -i 's,^unsigned,const unsigned,g' $@
mostlyclean:
rm -f $(HOST_COBJS) \
$(HOST_UTILS) \
$(COBJS) \
$(ASMOBJS) \
$(KERNEL) $(KERNEL).small
clean: mostlyclean
distclean: clean
rm -r .d
maintainer-clean: distclean
$(objdir)/obj/%.o: $(srcdir)/src/%.S
$(NASM) $(NASMFLAGS) -o $@ $<
$(objdir)/bin/%: $(objdir)/obj/%.o
$(CC) $(HOST_LDFLAGS) -o $@ $<
$(objdir)/obj/%.o: $(srcdir)/utils/%.c
$(CC) $(HOST_CFLAGS) $(HOST_CPPFLAGS) -MF .d/$*.d -c -o $@ $<
$(objdir)/obj/%.o: $(srcdir)/src/%.c
$(CC) $(CFLAGS) $(CPPFLAGS) -MF .d/$*.d -D_KERNEL -c -o $@ $<
# TODO check this still works with bochs
$(objdir)/bochs.sym $(KERNEL): $(COBJS) $(ASMOBJS) $(INTOBJS) $(srcdir)/src/script.ld
$(LD) $(LDFLAGS) -T$(srcdir)/src/script.ld -o $(KERNEL) $(ASMOBJS) $(COBJS) $(INTOBJS)
@objdump -t $(KERNEL) | grep "^00000000001" | cut -b 1-16,25- | tr -s ' ' | tr '\t' ' ' | cut -d ' ' -f 1,4 > $(objdir)/bochs.sym
$(KERNEL).small: $(KERNEL)
@cp $(KERNEL) $(KERNEL).small
@strip --strip-unneeded $(KERNEL).small
@strip -R .comment $(KERNEL).small
@strip -R .note.gnu.build-id $(KERNEL).small
@strip -R .eh_frame_hdr $(KERNEL).small
-include $(addprefix $(objdir)/.d/,$(notdir $(COBJS:%.o=%.d)))