arch/arm/config.mk

   1 #
   2 # (C) Copyright 2000-2002
   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 CROSS_COMPILE ?= arm-linux-
  25
  26 ifndef CONFIG_STANDALONE_LOAD_ADDR
  27 ifeq ($(SOC),omap3)
  28 CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
  29 else
  30 CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
  31 endif
  32 endif
  33
  34 PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
  35
  36 # Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
  37 PLATFORM_CPPFLAGS += $(call cc-option,-marm,)
  38
  39 # Try if EABI is supported, else fall back to old API,
  40 # i. e. for example:
  41 # - with ELDK 4.2 (EABI supported), use:
  42 #       -mabi=aapcs-linux -mno-thumb-interwork
  43 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
  44 #       -mabi=apcs-gnu -mno-thumb-interwork
  45 # - with ELDK 3.1 (gcc 3.x), use:
  46 #       -mapcs-32 -mno-thumb-interwork
  47 PLATFORM_CPPFLAGS += $(call cc-option,\
  48                                 -mabi=aapcs-linux -mno-thumb-interwork,\
  49                                 $(call cc-option,\
  50                                         -mapcs-32,\
  51                                         $(call cc-option,\
  52                                                 -mabi=apcs-gnu,\
  53                                         )\
  54                                 ) $(call cc-option,-mno-thumb-interwork,)\
  55                         )
  56
  57 # For EABI, make sure to provide raise()
  58 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
  59 # This file is parsed several times; make sure to add only once.
  60 ifeq (,$(findstring arch/arm/lib/eabi_compat.o,$(PLATFORM_LIBS)))
  61 PLATFORM_LIBS += $(OBJTREE)/arch/arm/lib/eabi_compat.o
  62 endif
  63 endif
  64
  65 ifdef CONFIG_SYS_LDSCRIPT
  66 # need to strip off double quotes
  67 LDSCRIPT := $(subst ",,$(CONFIG_SYS_LDSCRIPT))
  68 else
  69 LDSCRIPT := $(SRCTREE)/$(CPUDIR)/u-boot.lds
  70 endif
  71
  72 # needed for relocation
  73 ifndef CONFIG_NAND_SPL
  74 LDFLAGS_u-boot += -pie
  75 endif