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 #########################################################################
  73
  74 CONFIG_SHELL    := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  75                     else if [ -x /bin/bash ]; then echo /bin/bash; \
  76                     else echo sh; fi ; fi)
  77
  78 ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc)
  79 HOSTCC          = cc
  80 else
  81 HOSTCC          = gcc
  82 endif
  83 HOSTCFLAGS      = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  84 HOSTSTRIP       = strip
  85
  86 #########################################################################
  87 #
  88 # Option checker (courtesy linux kernel) to ensure
  89 # only supported compiler options are used
  90 #
  91 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
  92                 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
  93
  94 #
  95 # Include the make variables (CC, etc...)
  96 #
  97 AS      = $(CROSS_COMPILE)as
  98 LD      = $(CROSS_COMPILE)ld
  99 CC      = $(CROSS_COMPILE)gcc
 100 CPP     = $(CC) -E
 101 AR      = $(CROSS_COMPILE)ar
 102 NM      = $(CROSS_COMPILE)nm
 103 LDR     = $(CROSS_COMPILE)ldr
 104 STRIP   = $(CROSS_COMPILE)strip
 105 OBJCOPY = $(CROSS_COMPILE)objcopy
 106 OBJDUMP = $(CROSS_COMPILE)objdump
 107 RANLIB  = $(CROSS_COMPILE)RANLIB
 108
 109 #########################################################################
 110
 111 # Load generated board configuration
 112 sinclude $(OBJTREE)/include/autoconf.mk
 113
 114 ifdef   ARCH
 115 sinclude $(TOPDIR)/$(ARCH)_config.mk    # include architecture dependend rules
 116 endif
 117 ifdef   CPU
 118 sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include  CPU  specific rules
 119 endif
 120 ifdef   SOC
 121 sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk  # include  SoC  specific rules
 122 endif
 123 ifdef   VENDOR
 124 BOARDDIR = $(VENDOR)/$(BOARD)
 125 else
 126 BOARDDIR = $(BOARD)
 127 endif
 128 ifdef   BOARD
 129 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk  # include board specific rules
 130 endif
 131
 132 #########################################################################
 133
 134 ifneq (,$(findstring s,$(MAKEFLAGS)))
 135 ARFLAGS = cr
 136 else
 137 ARFLAGS = crv
 138 endif
 139 RELFLAGS= $(PLATFORM_RELFLAGS)
 140 DBGFLAGS= -g # -DDEBUG
 141 OPTFLAGS= -Os #-fomit-frame-pointer
 142 ifndef LDSCRIPT
 143 #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
 144 ifeq ($(CONFIG_NAND_U_BOOT),y)
 145 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
 146 else
 147 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
 148 endif
 149 endif
 150 OBJCFLAGS += --gap-fill=0xff
 151
 152 gccincdir := $(shell $(CC) -print-file-name=include)
 153
 154 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS)         \
 155         -D__KERNEL__
 156 ifneq ($(TEXT_BASE),)
 157 CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE)
 158 endif
 159
 160 ifneq ($(OBJTREE),$(SRCTREE))
 161 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
 162 endif
 163
 164 CPPFLAGS += -I$(TOPDIR)/include
 165 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc       \
 166         -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
 167
 168 ifdef BUILD_TAG
 169 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
 170         -DBUILD_TAG='"$(BUILD_TAG)"'
 171 else
 172 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
 173 endif
 174
 175 # avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
 176 # this option have to be placed behind -Wall -- that's why it is here
 177 ifeq ($(ARCH),nios)
 178 ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
 179 CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
 180 endif
 181 endif
 182
 183 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
 184 # option to the assembler.
 185 AFLAGS_DEBUG :=
 186
 187 # turn jbsr into jsr for m68k
 188 ifeq ($(ARCH),m68k)
 189 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
 190 AFLAGS_DEBUG := -Wa,-gstabs,-S
 191 endif
 192 endif
 193
 194 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
 195
 196 LDFLAGS += -Bstatic -T $(LDSCRIPT) $(PLATFORM_LDFLAGS)
 197 ifneq ($(TEXT_BASE),)
 198 LDFLAGS += -Ttext $(TEXT_BASE)
 199 endif
 200
 201 # Location of a usable BFD library, where we define "usable" as
 202 # "built for ${HOST}, supports ${TARGET}".  Sensible values are
 203 # - When cross-compiling: the root of the cross-environment
 204 # - Linux/ppc (native): /usr
 205 # - NetBSD/ppc (native): you lose ... (must extract these from the
 206 #   binutils build directory, plus the native and U-Boot include
 207 #   files don't like each other)
 208 #
 209 # So far, this is used only by tools/gdb/Makefile.
 210
 211 ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc)
 212 BFD_ROOT_DIR =          /usr/local/tools
 213 else
 214 ifeq ($(HOSTARCH),$(ARCH))
 215 # native
 216 BFD_ROOT_DIR =          /usr
 217 else
 218 #BFD_ROOT_DIR =         /LinuxPPC/CDK           # Linux/i386
 219 #BFD_ROOT_DIR =         /usr/pkg/cross          # NetBSD/i386
 220 BFD_ROOT_DIR =          /opt/powerpc
 221 endif
 222 endif
 223
 224 ifeq ($(PCI_CLOCK),PCI_66M)
 225 CFLAGS := $(CFLAGS) -DPCI_66M
 226 endif
 227
 228 #########################################################################
 229
 230 export  CONFIG_SHELL HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE \
 231         AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP \
 232         MAKE
 233 export  TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
 234
 235 #########################################################################
 236
 237 ifndef REMOTE_BUILD
 238
 239 %.s:    %.S
 240         $(CPP) $(AFLAGS) -o $@ $<
 241 %.o:    %.S
 242         $(CC) $(AFLAGS) -c -o $@ $<
 243 %.o:    %.c
 244         $(CC) $(CFLAGS) -c -o $@ $<
 245
 246 else
 247
 248 $(obj)%.s:      %.S
 249         $(CPP) $(AFLAGS) -o $@ $<
 250 $(obj)%.o:      %.S
 251         $(CC) $(AFLAGS) -c -o $@ $<
 252 $(obj)%.o:      %.c
 253         $(CC) $(CFLAGS) -c -o $@ $<
 254 endif
 255
 256 #########################################################################