config.mk

   1 #
   2 # (C) Copyright 2000-2006
   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 ifneq ($(OBJTREE),$(SRCTREE))
  27 ifeq ($(CURDIR),$(SRCTREE))
  28 dir :=
  29 else
  30 dir := $(subst $(SRCTREE)/,,$(CURDIR))
  31 endif
  32
  33 obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
  34 src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
  35
  36 $(shell mkdir -p $(obj))
  37 else
  38 obj :=
  39 src :=
  40 endif
  41
  42 # clean the slate ...
  43 PLATFORM_RELFLAGS =
  44 PLATFORM_CPPFLAGS =
  45 PLATFORM_LDFLAGS =
  46
  47 #
  48 # When cross-compiling on NetBSD, we have to define __PPC__ or else we
  49 # will pick up a va_list declaration that is incompatible with the
  50 # actual argument lists emitted by the compiler.
  51 #
  52 # [Tested on NetBSD/i386 1.5 + cross-powerpc-netbsd-1.3]
  53
  54 ifeq ($(ARCH),ppc)
  55 ifeq ($(CROSS_COMPILE),powerpc-netbsd-)
  56 PLATFORM_CPPFLAGS+= -D__PPC__
  57 endif
  58 ifeq ($(CROSS_COMPILE),powerpc-openbsd-)
  59 PLATFORM_CPPFLAGS+= -D__PPC__
  60 endif
  61 endif
  62
  63 ifeq ($(ARCH),arm)
  64 ifeq ($(CROSS_COMPILE),powerpc-netbsd-)
  65 PLATFORM_CPPFLAGS+= -D__ARM__
  66 endif
  67 ifeq ($(CROSS_COMPILE),powerpc-openbsd-)
  68 PLATFORM_CPPFLAGS+= -D__ARM__
  69 endif
  70 endif
  71
  72 ifeq ($(ARCH),blackfin)
  73 PLATFORM_CPPFLAGS+= -D__BLACKFIN__ -mno-underscore
  74 endif
  75
  76 ifdef   ARCH
  77 sinclude $(TOPDIR)/$(ARCH)_config.mk    # include architecture dependend rules
  78 endif
  79 ifdef   CPU
  80 sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include  CPU  specific rules
  81 endif
  82 ifdef   SOC
  83 sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk  # include  SoC  specific rules
  84 endif
  85 ifdef   VENDOR
  86 BOARDDIR = $(VENDOR)/$(BOARD)
  87 else
  88 BOARDDIR = $(BOARD)
  89 endif
  90 ifdef   BOARD
  91 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk  # include board specific rules
  92 endif
  93
  94 #########################################################################
  95
  96 CONFIG_SHELL    := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  97                     else if [ -x /bin/bash ]; then echo /bin/bash; \
  98                     else echo sh; fi ; fi)
  99
 100 ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc)
 101 HOSTCC          = cc
 102 else
 103 HOSTCC          = gcc
 104 endif
 105 HOSTCFLAGS      = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 106 HOSTSTRIP       = strip
 107
 108 #########################################################################
 109 #
 110 # Option checker (courtesy linux kernel) to ensure
 111 # only supported compiler options are used
 112 #
 113 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
 114                 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
 115
 116 #
 117 # Include the make variables (CC, etc...)
 118 #
 119 AS      = $(CROSS_COMPILE)as
 120 LD      = $(CROSS_COMPILE)ld
 121 CC      = $(CROSS_COMPILE)gcc
 122 CPP     = $(CC) -E
 123 AR      = $(CROSS_COMPILE)ar
 124 NM      = $(CROSS_COMPILE)nm
 125 STRIP   = $(CROSS_COMPILE)strip
 126 OBJCOPY = $(CROSS_COMPILE)objcopy
 127 OBJDUMP = $(CROSS_COMPILE)objdump
 128 RANLIB  = $(CROSS_COMPILE)RANLIB
 129
 130 ifneq (,$(findstring s,$(MAKEFLAGS)))
 131 ARFLAGS = cr
 132 else
 133 ARFLAGS = crv
 134 endif
 135 RELFLAGS= $(PLATFORM_RELFLAGS)
 136 DBGFLAGS= -g # -DDEBUG
 137 OPTFLAGS= -Os #-fomit-frame-pointer
 138 ifndef LDSCRIPT
 139 #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
 140 ifeq ($(CONFIG_NAND_U_BOOT),y)
 141 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
 142 else
 143 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
 144 endif
 145 endif
 146 OBJCFLAGS += --gap-fill=0xff
 147
 148 gccincdir := $(shell $(CC) -print-file-name=include)
 149
 150 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS)         \
 151         -D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE)           \
 152
 153 ifneq ($(OBJTREE),$(SRCTREE))
 154 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
 155 endif
 156
 157 CPPFLAGS += -I$(TOPDIR)/include
 158 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc       \
 159         -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
 160
 161 ifdef BUILD_TAG
 162 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
 163         -DBUILD_TAG='"$(BUILD_TAG)"'
 164 else
 165 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
 166 endif
 167
 168 # avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
 169 # this option have to be placed behind -Wall -- that's why it is here
 170 ifeq ($(ARCH),nios)
 171 ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
 172 CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
 173 endif
 174 endif
 175
 176 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
 177 # option to the assembler.
 178 AFLAGS_DEBUG :=
 179
 180 # turn jbsr into jsr for m68k
 181 ifeq ($(ARCH),m68k)
 182 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
 183 AFLAGS_DEBUG := -Wa,-gstabs,-S
 184 endif
 185 endif
 186
 187 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
 188
 189 LDFLAGS += -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS)
 190
 191 # Location of a usable BFD library, where we define "usable" as
 192 # "built for ${HOST}, supports ${TARGET}".  Sensible values are
 193 # - When cross-compiling: the root of the cross-environment
 194 # - Linux/ppc (native): /usr
 195 # - NetBSD/ppc (native): you lose ... (must extract these from the
 196 #   binutils build directory, plus the native and U-Boot include
 197 #   files don't like each other)
 198 #
 199 # So far, this is used only by tools/gdb/Makefile.
 200
 201 ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc)
 202 BFD_ROOT_DIR =          /usr/local/tools
 203 else
 204 ifeq ($(HOSTARCH),$(ARCH))
 205 # native
 206 BFD_ROOT_DIR =          /usr
 207 else
 208 #BFD_ROOT_DIR =         /LinuxPPC/CDK           # Linux/i386
 209 #BFD_ROOT_DIR =         /usr/pkg/cross          # NetBSD/i386
 210 BFD_ROOT_DIR =          /opt/powerpc
 211 endif
 212 endif
 213
 214 ifeq ($(PCI_CLOCK),PCI_66M)
 215 CFLAGS := $(CFLAGS) -DPCI_66M
 216 endif
 217
 218 #########################################################################
 219
 220 export  CONFIG_SHELL HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE \
 221         AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP \
 222         MAKE
 223 export  TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
 224
 225 #########################################################################
 226
 227 ifndef REMOTE_BUILD
 228
 229 %.s:    %.S
 230         $(CPP) $(AFLAGS) -o $@ $<
 231 %.o:    %.S
 232         $(CC) $(AFLAGS) -c -o $@ $<
 233 %.o:    %.c
 234         $(CC) $(CFLAGS) -c -o $@ $<
 235
 236 else
 237
 238 $(obj)%.s:      %.S
 239         $(CPP) $(AFLAGS) -o $@ $<
 240 $(obj)%.o:      %.S
 241         $(CC) $(AFLAGS) -c -o $@ $<
 242 $(obj)%.o:      %.c
 243         $(CC) $(CFLAGS) -c -o $@ $<
 244 endif
 245
 246 #########################################################################