mk/com32.mk

   1 ## -*- makefile -*- -------------------------------------------------------
   2 ##
   3 ##   Copyright 2008-2009 H. Peter Anvin - All Rights Reserved
   4 ##   Copyright 2009 Intel Corporation; author: H. Peter Anvin
   5 ##
   6 ##   This program is free software; you can redistribute it and/or modify
   7 ##   it under the terms of the GNU General Public License as published by
   8 ##   the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   9 ##   Boston MA 02110-1301, USA; either version 2 of the License, or
  10 ##   (at your option) any later version; incorporated herein by reference.
  11 ##
  12 ## -----------------------------------------------------------------------
  13
  14 ##
  15 ## COM32 common configurables
  16 ##
  17
  18 include $(MAKEDIR)/syslinux.mk
  19
  20 GCCOPT := $(call gcc_ok,-std=gnu99,)
  21 GCCOPT += $(call gcc_ok,-m32,)
  22 GCCOPT += $(call gcc_ok,-fno-stack-protector,)
  23 GCCOPT += $(call gcc_ok,-fwrapv,)
  24 GCCOPT += $(call gcc_ok,-freg-struct-return,)
  25 GCCOPT += -mregparm=3 -DREGPARM=3 -march=i386 -Os
  26 GCCOPT += $(call gcc_ok,-fPIE,-fPIC)
  27 GCCOPT += $(call gcc_ok,-fno-exceptions,)
  28 GCCOPT += $(call gcc_ok,-fno-asynchronous-unwind-tables,)
  29 GCCOPT += $(call gcc_ok,-fno-strict-aliasing,)
  30 GCCOPT += $(call gcc_ok,-falign-functions=0,-malign-functions=0)
  31 GCCOPT += $(call gcc_ok,-falign-jumps=0,-malign-jumps=0)
  32 GCCOPT += $(call gcc_ok,-falign-labels=0,-malign-labels=0)
  33 GCCOPT += $(call gcc_ok,-falign-loops=0,-malign-loops=0)
  34 GCCOPT += $(call gcc_ok,-mpreferred-stack-boundary=2,)
  35 GCCOPT += $(call gcc_ok,-incoming-stack-boundary=2,)
  36
  37 com32  := $(topdir)/com32
  38 RELOCS := $(com32)/tools/relocs
  39
  40 ifneq ($(NOGPL),1)
  41 GPLLIB     = $(com32)/gpllib/libcom32gpl.a
  42 GPLINCLUDE = -I$(com32)/gplinclude
  43 else
  44 GPLLIB     =
  45 GPLINCLUDE =
  46 endif
  47
  48 CFLAGS     = $(GCCOPT) $(GCCWARN) -march=i386 \
  49              -fomit-frame-pointer -D__COM32__ \
  50              -nostdinc -iwithprefix include \
  51              -I$(com32)/libutil/include -I$(com32)/include $(GPLINCLUDE)
  52 SFLAGS     = $(GCCOPT) $(GCCWARN) -march=i386 \
  53              -fomit-frame-pointer -D__COM32__ \
  54              -nostdinc -iwithprefix include \
  55              -I$(com32)/libutil/include -I$(com32)/include $(GPLINCLUDE)
  56
  57 COM32LD    = $(com32)/lib/com32.ld
  58 LDFLAGS    = -m elf_i386 --emit-relocs -T $(COM32LD)
  59 LIBGCC    := $(shell $(CC) $(GCCOPT) --print-libgcc)
  60
  61 LNXCFLAGS  = -I$(com32)/libutil/include $(GCCWARN) -O -g \
  62              -D_GNU_SOURCE -D_FORTIFY_SOURCE=0 -Wno-error
  63 LNXSFLAGS  = -g
  64 LNXLDFLAGS = -g
  65
  66 C_LIBS     = $(com32)/libutil/libutil_com.a $(GPLLIB) \
  67              $(com32)/lib/libcom32.a $(LIBGCC)
  68 C_LNXLIBS  = $(com32)/libutil/libutil_lnx.a
  69
  70 .SUFFIXES: .lss .c .lo .o .elf .c32 .lnx
  71
  72 .PRECIOUS: %.o
  73 %.o: %.S
  74         $(CC) $(MAKEDEPS) $(SFLAGS) -c -o $@ $<
  75
  76 .PRECIOUS: %.o
  77 %.o: %.c
  78         $(CC) $(MAKEDEPS) $(CFLAGS) -c -o $@ $<
  79
  80 .PRECIOUS: %.elf
  81 %.elf: %.o $(LIBS) $(C_LIBS) $(COM32LD)
  82         $(LD) $(LDFLAGS) -o $@ $(filter-out $(COM32LD),$^)
  83
  84 .PRECIOUS: %.lo
  85 %.lo: %.S
  86         $(CC) $(MAKEDEPS) $(LNXSFLAGS) -c -o $@ $<
  87
  88 .PRECIOUS: %.lo
  89 %.lo: %.c
  90         $(CC) $(MAKEDEPS) $(LNXCFLAGS) -c -o $@ $<
  91
  92 .PRECIOUS: %.lnx
  93 %.lnx: %.lo $(LNXLIBS) $(C_LNXLIBS)
  94         $(CC) $(LNXCFLAGS) -o $@ $^
  95
  96 %.c32: %.elf
  97         $(OBJCOPY) -O binary $< $@
  98         $(RELOCS) $< >> $@ || ( rm -f $@ ; false )