lib_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 PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
  27
  28 # Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
  29 PLATFORM_CPPFLAGS += $(call cc-option,-marm,)
  30
  31 # Try if EABI is supported, else fall back to old API,
  32 # i. e. for example:
  33 # - with ELDK 4.2 (EABI supported), use:
  34 #       -mabi=aapcs-linux -mno-thumb-interwork
  35 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
  36 #       -mabi=apcs-gnu -mno-thumb-interwork
  37 # - with ELDK 3.1 (gcc 3.x), use:
  38 #       -mapcs-32 -mno-thumb-interwork
  39 PLATFORM_CPPFLAGS += $(call cc-option,\
  40                                 -mabi=aapcs-linux -mno-thumb-interwork,\
  41                                 $(call cc-option,\
  42                                         -mapcs-32,\
  43                                         $(call cc-option,\
  44                                                 -mabi=apcs-gnu,\
  45                                         )\
  46                                 ) $(call cc-option,-mno-thumb-interwork,)\
  47                         )
  48
  49 # For EABI, make sure to provide raise()
  50 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
  51 # This file is parsed several times; make sure to add only once.
  52 ifeq (,$(findstring lib_arm/eabi_compat.o,$(PLATFORM_LIBS)))
  53 PLATFORM_LIBS += $(OBJTREE)/lib_arm/eabi_compat.o
  54 endif
  55 endif
  56 LDSCRIPT := $(SRCTREE)/cpu/$(CPU)/u-boot.lds