config.mk

   1 #
   2 # (C) Copyright 2000
   3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 #
   5 # See file CREDITS for list of people who contributed to this
   6 # project.
   7 #
   8 # This program is free software; you can redistribute it and/or
   9 # modify it under the terms of the GNU General Public License as
  10 # published by the Free Software Foundation; either version 2 of
  11 # the License, or (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program; if not, write to the Free Software
  20 # Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 # MA 02111-1307 USA
  22 #
  23
  24 #########################################################################
  25
  26 # clean the slate ...
  27 PLATFORM_RELFLAGS =
  28 PLATFORM_CPPFLAGS =
  29 PLATFORM_LDFLAGS =
  30
  31 #
  32 # When cross-compiling on NetBSD, we have to define __PPC__ or else we
  33 # will pick up a va_list declaration that is incompatible with the
  34 # actual argument lists emitted by the compiler.
  35 #
  36 # [Tested on NetBSD/i386 1.5 + cross-powerpc-netbsd-1.3]
  37
  38 ifeq ($(ARCH),ppc)
  39 ifeq ($(CROSS_COMPILE),powerpc-netbsd-)
  40 PLATFORM_CPPFLAGS+= -D__PPC__
  41 endif
  42 ifeq ($(CROSS_COMPILE),powerpc-openbsd-)
  43 PLATFORM_CPPFLAGS+= -D__PPC__
  44 endif
  45 endif
  46
  47 ifeq ($(ARCH),arm)
  48 ifeq ($(CROSS_COMPILE),powerpc-netbsd-)
  49 PLATFORM_CPPFLAGS+= -D__ARM__
  50 endif
  51 ifeq ($(CROSS_COMPILE),powerpc-openbsd-)
  52 PLATFORM_CPPFLAGS+= -D__ARM__
  53 endif
  54 endif
  55
  56 ifdef   ARCH
  57 sinclude $(TOPDIR)/$(ARCH)_config.mk    # include architecture dependend rules
  58 endif
  59 ifdef   CPU
  60 sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include  CPU  specific rules
  61 endif
  62 ifdef   VENDOR
  63 BOARDDIR = $(VENDOR)/$(BOARD)
  64 else
  65 BOARDDIR = $(BOARD)
  66 endif
  67 ifdef   BOARD
  68 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk  # include board specific rules
  69 endif
  70
  71 #########################################################################
  72
  73 CONFIG_SHELL    := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  74                     else if [ -x /bin/bash ]; then echo /bin/bash; \
  75                     else echo sh; fi ; fi)
  76
  77 ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc)
  78 HOSTCC          = cc
  79 else
  80 HOSTCC          = gcc
  81 endif
  82 HOSTCFLAGS      = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  83 HOSTSTRIP       = strip
  84
  85 #########################################################################
  86 #
  87 # Option checker (courtesy linux kernel) to ensure
  88 # only supported compiler options are used
  89 #
  90 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
  91                 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
  92
  93 #
  94 # Include the make variables (CC, etc...)
  95 #
  96 AS      = $(CROSS_COMPILE)as
  97 LD      = $(CROSS_COMPILE)ld
  98 CC      = $(CROSS_COMPILE)gcc
  99 CPP     = $(CC) -E
 100 AR      = $(CROSS_COMPILE)ar
 101 NM      = $(CROSS_COMPILE)nm
 102 STRIP   = $(CROSS_COMPILE)strip
 103 OBJCOPY = $(CROSS_COMPILE)objcopy
 104 OBJDUMP = $(CROSS_COMPILE)objdump
 105 RANLIB  = $(CROSS_COMPILE)RANLIB
 106
 107 RELFLAGS= $(PLATFORM_RELFLAGS)
 108 DBGFLAGS= -g # -DDEBUG
 109 OPTFLAGS= -Os #-fomit-frame-pointer
 110 ifndef LDSCRIPT
 111 #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/x-load.lds.debug
 112 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/x-load.lds
 113 endif
 114 OBJCFLAGS += --gap-fill=0xff
 115
 116 gccincdir := $(shell $(CC) -print-file-name=include)
 117
 118 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS)         \
 119         -D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE)           \
 120         -I$(TOPDIR)/include                             \
 121         -fno-builtin -ffreestanding -nostdinc -isystem  \
 122         $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
 123
 124 ifdef BUILD_TAG
 125 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
 126         -DBUILD_TAG='"$(BUILD_TAG)"'
 127 else
 128 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
 129 endif
 130
 131 AFLAGS_DEBUG := -Wa,-gstabs
 132 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
 133
 134 LDFLAGS += -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS)
 135
 136 # Location of a usable BFD library, where we define "usable" as
 137 # "built for ${HOST}, supports ${TARGET}".  Sensible values are
 138 # - When cross-compiling: the root of the cross-environment
 139 # - Linux/ppc (native): /usr
 140 # - NetBSD/ppc (native): you lose ... (must extract these from the
 141 #   binutils build directory, plus the native and U-Boot include
 142 #   files don't like each other)
 143 #
 144 # So far, this is used only by tools/gdb/Makefile.
 145
 146 ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc)
 147 BFD_ROOT_DIR =          /usr/local/tools
 148 else
 149 ifeq ($(HOSTARCH),$(ARCH))
 150 # native
 151 BFD_ROOT_DIR =          /usr
 152 else
 153 #BFD_ROOT_DIR =         /LinuxPPC/CDK           # Linux/i386
 154 #BFD_ROOT_DIR =         /usr/pkg/cross          # NetBSD/i386
 155 BFD_ROOT_DIR =          /opt/powerpc
 156 endif
 157 endif
 158
 159 #########################################################################
 160
 161 export  CONFIG_SHELL HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE \
 162         AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP \
 163         MAKE
 164 export  TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
 165
 166 #########################################################################
 167
 168 %.s:    %.S
 169         $(CPP) $(AFLAGS) -o $@ $(CURDIR)/$<
 170 %.o:    %.S
 171         $(CC) $(AFLAGS) -c -o $@ $(CURDIR)/$<
 172 %.o:    %.c
 173         $(CC) $(CFLAGS) -c -o $@ $<
 174
 175 #########################################################################