78 lines
1.8 KiB
Makefile
78 lines
1.8 KiB
Makefile
# Copyright 2010 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# $Id$
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BUILD_DATE = \"$(shell date -u)\"
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BUILD_SHORT_DATE = \"$(shell date -u +%D)\"
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BUILD_HOST = \"$(shell hostname)\"
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BUILD_USER = \"$(shell whoami)\"
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CFLAGS := -Wall -Os -m32 -nostdlib
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ASFLAGS := $(CFLAGS)
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ASFLAGS += -DBUILD_DATE="$(BUILD_DATE)"
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ASFLAGS += -DBUILD_SHORT_DATE="$(BUILD_SHORT_DATE)"
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ASFLAGS += -DBUILD_HOST="$(BUILD_HOST)"
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ASFLAGS += -DBUILD_USER="$(BUILD_USER)"
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LDSCRIPT := rom16.ld
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LDFLAGS := -T $(LDSCRIPT) -nostdlib
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OBJCOPY := objcopy
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ASRCS = sgabios.S
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CSRCS =
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SRCS = $(CSRCS) $(ASRCS)
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OBJS = ${CSRCS:.c=.o} ${ASRCS:.S=.o}
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INCS = ${CSRCS:.c=.h} ${ASRCS:.S=.h}
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PROGS = sgabios.bin csum8
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.SUFFIXES: .bin .elf
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.PHONY: buildinfo
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all: $(PROGS)
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sgabios.bin: sgabios.elf
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$(OBJCOPY) -O binary $< $@
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./csum8 $@
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sgabios.elf: .depend $(OBJS) $(LDSCRIPT) csum8
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$(LD) $(LDFLAGS) $(OBJS) -o $@
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csum8: csum8.c
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$(CC) -Wall -O2 -o $@ $<
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sgabios.o: buildinfo
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buildinfo:
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touch sgabios.S
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clean:
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$(RM) $(PROGS) $(OBJS) *.elf *.srec *.com version.h
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.depend:: $(INCS) $(SRCS) Makefile
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$(RM) .depend
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$(CPP) -M $(CFLAGS) $(SRCS) >.tmpdepend && mv .tmpdepend .depend
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ifeq (.depend, $(wildcard .depend))
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include .depend
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else
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# if no .depend file existed, add a make clean to the end of building .depend
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.depend::
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$(MAKE) clean
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endif
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