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gcc_ok = $(shell if $(CC) $(1) -c -x c /dev/null -o /dev/null 2>/dev/null; \
then echo $(1); else echo $(2); fi)
M32 := $(call gcc_ok,-m32,)
ALIGN := $(call gcc_ok,-falign-functions=0 -falign-jumps=0 -falign-loops=0,-malign-functions=0 -malign-jumps=0 -malign-loops=0)
CC = gcc
CFLAGS = $(M32) -funsigned-char -g -W -Wall -march=i386 $(ALIGN) -Os
AR = ar
AS = as
LD = ld -m elf_i386
OBJCOPY = objcopy
RANLIB = ranlib
LIBMENU = biosio.o16 string.o16 menu.o16 syslinux.o16
MENUS = simple.com complex.com
.SUFFIXES: .c .s .s16 .o16 .elf .com
.c.s:
$(CC) $(CFLAGS) -S -o $@ $<
.s.s16:
echo '.code16gcc' | cat - $< > $@
.s16.o16:
$(AS) -o $@ $<
.elf.com:
$(OBJCOPY) -O binary $< $@
%.elf: %.o16 startup.o16 com16.ld libmenu.a
$(LD) -T com16.ld -o $@ startup.o16 $< libmenu.a
all : $(MENUS)
startup.s16: startup.S16
$(CC) $(CFLAGS) -x assembler-with-cpp -E -o $@ $<
libmenu.a: $(LIBMENU)
-rm -f $@
$(AR) cq $@ $^
$(RANLIB) $@
clean:
-rm -f *.s *.s16 *.o16 *.elf *.com *.a
spotless: clean
-rm -f *~ \#*
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