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