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 ($(SOC),omap3)
  28 CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
  29 else
  30 CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
  31 endif
  32 endif
  33
  34 PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
  35
  36 # Choose between ARM/Thumb instruction sets
  37 ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
  38 PF_CPPFLAGS_ARM := $(call cc-option, -mthumb -mthumb-interwork,\
  39                         $(call cc-option,-marm,)\
  40                         $(call cc-option,-mno-thumb-interwork,)\
  41                 )
  42 else
  43 PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
  44                 $(call cc-option,-mno-thumb-interwork,)
  45 endif
  46
  47 # Try if EABI is supported, else fall back to old API,
  48 # i. e. for example:
  49 # - with ELDK 4.2 (EABI supported), use:
  50 #       -mabi=aapcs-linux
  51 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
  52 #       -mabi=apcs-gnu
  53 # - with ELDK 3.1 (gcc 3.x), use:
  54 #       -mapcs-32
  55 PF_CPPFLAGS_ABI := $(call cc-option,\
  56                         -mabi=aapcs-linux,\
  57                         $(call cc-option,\
  58                                 -mapcs-32,\
  59                                 $(call cc-option,\
  60                                         -mabi=apcs-gnu,\
  61                                 )\
  62                         )\
  63                 )
  64 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
  65
  66 # For EABI, make sure to provide raise()
  67 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
  68 # This file is parsed many times, so the string may get added multiple
  69 # times. Also, the prefix needs to be different based on whether
  70 # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
  71 # before adding the correct one.
  72 ifdef CONFIG_SPL_BUILD
  73 PLATFORM_LIBS := $(SPLTREE)/arch/arm/lib/eabi_compat.o \
  74         $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
  75 else
  76 PLATFORM_LIBS := $(OBJTREE)/arch/arm/lib/eabi_compat.o \
  77         $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
  78 endif
  79 endif
  80
  81 # needed for relocation
  82 ifndef CONFIG_NAND_SPL
  83 LDFLAGS_u-boot += -pie
  84 endif