src/arch/i386/Makefile

   1 # Force i386-only instructions
   2 #
   3 CFLAGS          += -march=i386
   4
   5 # Code size reduction.
   6 #
   7 CFLAGS          += -fomit-frame-pointer
   8
   9 # Code size reduction.
  10 #
  11 ifeq ($(CCTYPE),gcc)
  12 CFLAGS          += -fstrength-reduce
  13 endif
  14
  15 # Code size reduction.  gcc3 needs a different syntax to gcc2 if you
  16 # want to avoid spurious warnings.
  17 #
  18 ifeq ($(CCTYPE),gcc)
  19 GCC_VERSION     := $(subst ., ,$(shell $(CC) -dumpversion))
  20 GCC_MAJOR       := $(firstword $(GCC_VERSION))
  21 ifeq ($(GCC_MAJOR),2)
  22 CFLAGS          += -malign-jumps=1 -malign-loops=1 -malign-functions=1
  23 else
  24 CFLAGS          += -falign-jumps=1 -falign-loops=1 -falign-functions=1
  25 endif # gcc2
  26 endif # gcc
  27
  28 # Code size reduction.  This is almost always a win.  The kernel uses
  29 # it, too.
  30 #
  31 ifeq ($(CCTYPE),gcc)
  32 CFLAGS          += -mpreferred-stack-boundary=2
  33 endif
  34
  35 # Code size reduction.  Use regparm for all functions - C functions
  36 # called from assembly (or vice versa) need __asmcall now
  37 #
  38 CFLAGS          += -mregparm=3
  39
  40 # Code size reduction.  Use -mrtd (same __asmcall requirements as above)
  41 ifeq ($(CCTYPE),gcc)
  42 CFLAGS          += -mrtd
  43 endif
  44
  45 # Code size reduction.  This is the logical complement to -mregparm=3.
  46 # It doesn't currently buy us anything, but if anything ever tries to
  47 # return small structures, let's be prepared
  48 #
  49 CFLAGS          += -freg-struct-return
  50
  51 # Force 32-bit code even on an x86-64 machine
  52 #
  53 CFLAGS          += -m32
  54 ASFLAGS         += --32
  55 ifeq ($(HOST_OS),FreeBSD)
  56 LDFLAGS         += -m elf_i386_fbsd
  57 else
  58 LDFLAGS         += -m elf_i386
  59 endif
  60
  61 # EFI requires -fshort-wchar, and nothing else currently uses wchar_t
  62 #
  63 CFLAGS          += -fshort-wchar
  64
  65 # We need to undefine the default macro "i386" when compiling .S
  66 # files, otherwise ".arch i386" translates to ".arch 1"...
  67 #
  68 CFLAGS                  += -Ui386
  69
  70 # Locations of utilities
  71 #
  72 ISOLINUX_BIN_LIST       := \
  73         $(ISOLINUX_BIN) \
  74         /usr/lib/syslinux/isolinux.bin \
  75         /usr/share/syslinux/isolinux.bin
  76 ISOLINUX_BIN    = $(firstword $(wildcard $(ISOLINUX_BIN_LIST)))
  77
  78 # i386-specific directories containing source files
  79 #
  80 SRCDIRS         += arch/i386/core arch/i386/transitions arch/i386/prefix
  81 SRCDIRS         += arch/i386/firmware/pcbios
  82 SRCDIRS         += arch/i386/image
  83 SRCDIRS         += arch/i386/drivers
  84 SRCDIRS         += arch/i386/drivers/net
  85 SRCDIRS         += arch/i386/interface/pcbios
  86 SRCDIRS         += arch/i386/interface/pxe
  87 SRCDIRS         += arch/i386/interface/pxeparent
  88 SRCDIRS         += arch/i386/interface/syslinux
  89 SRCDIRS         += arch/i386/hci/commands
  90
  91 # The various xxx_loader.c files are #included into core/loader.c and
  92 # should not be compiled directly.
  93 #
  94 NON_AUTO_SRCS   += arch/i386/core/aout_loader.c
  95 NON_AUTO_SRCS   += arch/i386/core/freebsd_loader.c
  96 NON_AUTO_SRCS   += arch/i386/core/wince_loader.c
  97
  98 # Include common x86 Makefile
  99 #
 100 MAKEDEPS        += arch/x86/Makefile
 101 include arch/x86/Makefile
 102
 103 # Include platform-specific Makefile
 104 #
 105 MAKEDEPS        += arch/i386/Makefile.$(PLATFORM)
 106 include arch/i386/Makefile.$(PLATFORM)
 107
 108 # Some suffixes (e.g. %.fd0) are generated directly from other
 109 # finished files (e.g. %.dsk), rather than having their own prefix.
 110
 111 # rule to write disk images to /dev/fd0
 112 NON_AUTO_MEDIA  += fd0
 113 %fd0 : %dsk
 114         $(QM)$(ECHO) "  [DD] $@"
 115         $(Q)dd if=$< bs=512 conv=sync of=/dev/fd0
 116         $(Q)sync
 117
 118 # Add NON_AUTO_MEDIA to the media list, so that they show up in the
 119 # output of "make"
 120 #
 121 MEDIA           += $(NON_AUTO_MEDIA)