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 # Support IA32 and x86_64 platforms with one build
  21 # Set up architecture specifics; for cross compilation, set ARCH as apt
  22 GCCOPT := $(call gcc_ok,-std=gnu99,)
  23 ifeq ($(strip $(ARCH)),i386)
  24         GCCOPT += $(call gcc_ok,-m32,)
  25         GCCOPT += $(call gcc_ok,-march=i386)
  26         GCCOPT += $(call gcc_ok,-mpreferred-stack-boundary=2,)
  27         GCCOPT += $(call gcc_ok,-incoming-stack-boundary=2,)
  28 endif
  29 ifeq ($(strip $(ARCH)),x86_64)
  30         GCCOPT += $(call gcc_ok,-m64,)
  31         GCCOPT += $(call gcc_ok,-march=x86-64)
  32         #let the stack-boundary default to whatever it is on 64bit
  33         #GCCOPT += $(call gcc_ok,-mpreferred-stack-boundary=8,)
  34         #GCCOPT += $(call gcc_ok,-incoming-stack-boundary=8,)
  35 endif
  36 GCCOPT += $(call gcc_ok,-fno-stack-protector,)
  37 GCCOPT += $(call gcc_ok,-fwrapv,)
  38 GCCOPT += $(call gcc_ok,-freg-struct-return,)
  39 GCCOPT += -Os
  40 # Note -fPIE does not work with ld on x86_64, try -fPIC instead
  41 # Does BIOS build require -fPIE?
  42 GCCOPT += $(call gcc_ok,-fPIC)
  43 GCCOPT += $(call gcc_ok,-fno-exceptions,)
  44 GCCOPT += $(call gcc_ok,-fno-asynchronous-unwind-tables,)
  45 GCCOPT += $(call gcc_ok,-fno-strict-aliasing,)
  46 GCCOPT += $(call gcc_ok,-falign-functions=0,-malign-functions=0)
  47 GCCOPT += $(call gcc_ok,-falign-jumps=0,-malign-jumps=0)
  48 GCCOPT += $(call gcc_ok,-falign-labels=0,-malign-labels=0)
  49 GCCOPT += $(call gcc_ok,-falign-loops=0,-malign-loops=0)
  50
  51 ifndef EFI_BUILD
  52 GCCOPT += -mregparm=3 -DREGPARM=3
  53 endif
  54
  55 com32  := $(topdir)/com32
  56 RELOCS := $(com32)/tools/relocs
  57
  58 ifneq ($(NOGPL),1)
  59 GPLLIB     = $(com32)/gpllib/libcom32gpl.a
  60 GPLINCLUDE = -I$(com32)/gplinclude
  61 else
  62 GPLLIB     =
  63 GPLINCLUDE =
  64 endif
  65
  66 CFLAGS     = $(GCCOPT) $(GCCWARN) \
  67              -fomit-frame-pointer -D__COM32__ \
  68              -nostdinc -iwithprefix include \
  69              -I$(com32)/libutil/include -I$(com32)/include \
  70              -I$(com32)/include/sys $(GPLINCLUDE)
  71 SFLAGS     = $(GCCOPT) $(GCCWARN) \
  72              -fomit-frame-pointer -D__COM32__ \
  73              -nostdinc -iwithprefix include \
  74              -I$(com32)/libutil/include -I$(com32)/include \
  75              -I$(com32)/include/sys $(GPLINCLUDE)
  76
  77 COM32LD    = $(com32)/lib/$(ARCH)/elf.ld
  78 LDFLAGS    = -m elf_$(ARCH) -shared --hash-style=gnu -T $(COM32LD)
  79 LIBGCC    := $(shell $(CC) $(GCCOPT) --print-libgcc)
  80
  81 LNXCFLAGS  = -I$(com32)/libutil/include $(GCCWARN) -O -g \
  82              -D_GNU_SOURCE -D_FORTIFY_SOURCE=0 -Wno-error
  83 LNXSFLAGS  = -g
  84 LNXLDFLAGS = -g
  85
  86 C_LIBS     = $(GPLLIB) $(com32)/lib/libcom32.c32 $(LIBGCC)
  87 C_LNXLIBS  = $(com32)/libutil/libutil_lnx.a
  88
  89 .SUFFIXES: .lss .c .lo .o .elf .c32 .lnx
  90
  91 .PRECIOUS: %.o
  92 %.o: %.S
  93         $(CC) $(MAKEDEPS) $(SFLAGS) -c -o $@ $<
  94
  95 .PRECIOUS: %.o
  96 %.o: %.c
  97         $(CC) $(MAKEDEPS) $(CFLAGS) -c -o $@ $<
  98
  99 .PRECIOUS: %.elf
 100 %.elf: %.o $(LIBS) $(C_LIBS) $(COM32LD)
 101         $(LD) $(LDFLAGS) -o $@ $(filter-out $(COM32LD),$^)
 102
 103 .PRECIOUS: %.lo
 104 %.lo: %.S
 105         $(CC) $(MAKEDEPS) $(LNXSFLAGS) -c -o $@ $<
 106
 107 .PRECIOUS: %.lo
 108 %.lo: %.c
 109         $(CC) $(MAKEDEPS) $(LNXCFLAGS) -c -o $@ $<
 110
 111 .PRECIOUS: %.lnx
 112 %.lnx: %.lo $(LNXLIBS) $(C_LNXLIBS)
 113         $(CC) $(LNXCFLAGS) -o $@ $^
 114
 115 %.c32: %.elf
 116         $(OBJCOPY) --strip-debug --strip-unneeded $< $@
 117         ##$(OBJCOPY) -O binary $< $@
 118         ##$(RELOCS) $< >> $@ || ( rm -f $@ ; false )