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TMPFILE = $(shell mktemp /tmp/gcc_ok.XXXXXX)
gcc_ok = $(shell tmpf=$(TMPFILE); if gcc $(1) -c -x c /dev/null -o $$tmpf 2>/dev/null; \
then echo $(1); else echo $(2); fi; rm -f $$tmpf)
M32 := $(call gcc_ok,-m32,) $(call gcc_ok,-ffreestanding,) \
$(call gcc_ok,-fno-stack-protector,) \
$(call gcc_ok,-fno-top-level-reorder,$(call gcc_ok,-fno-unit-at-a-time))
CC = gcc
LD = ld -m elf_i386
OBJCOPY = objcopy
OPTFLAGS = -g -Os -march=i386 -falign-functions=0 -falign-jumps=0 -falign-loops=0 -fomit-frame-pointer
INCLUDES = -include code16.h -nostdinc -iwithprefix include \
-I. -I.. -I../libfat -I ../libinstaller
CFLAGS = $(M32) -mregparm=3 -DREGPARM=3 -W -Wall -msoft-float $(OPTFLAGS) $(INCLUDES)
LDFLAGS = -T com16.ld
AR = ar
RANLIB = ranlib
LIBGCC := $(shell $(CC) --print-libgcc)
SRCS = syslinux.c \
../syslxmod.c ../bootsect_bin.c ../ldlinux_bin.c ../mbr_bin.c \
$(wildcard ../libfat/*.c)
OBJS = crt0.o $(patsubst %.c,%.o,$(notdir $(SRCS)))
LIBOBJS = conio.o memcpy.o memset.o skipatou.o atou.o malloc.o free.o \
argv.o printf.o __divdi3.o __udivmoddi4.o
.SUFFIXES: .c .o .i .s .S .elf .com
VPATH = .:..:../libfat:../libinstaller
TARGETS = syslinux.com
all: $(TARGETS)
tidy:
-rm -f *.o *.i *.s *.a .*.d *.elf
clean: tidy
spotless: clean
-rm -f *~ $(TARGETS)
installer:
syslinux.elf: $(OBJS) libcom.a
$(LD) $(LDFLAGS) -o $@ $^
libcom.a: $(LIBOBJS)
-rm -f $@
$(AR) cq $@ $^
$(RANLIB) $@
syslinux.com: syslinux.elf
$(OBJCOPY) -O binary $< $@
%.o: %.c
$(CC) -Wp,-MT,$@,-MD,.$@.d $(CFLAGS) -c -o $@ $<
%.i: %.c
$(CC) $(CFLAGS) -E -o $@ $<
%.s: %.c
$(CC) $(CFLAGS) -S -o $@ $<
%.o: %.S
$(CC) -Wp,-MT,$@,-MD,.$@.d $(CFLAGS) -D__ASSEMBLY__ -c -o $@ $<
%.s: %.S
$(CC) $(CFLAGS) -E -o $@ $<
-include .*.d
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