2 # (C) Copyright 2000-2002
3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 # See file CREDITS for list of people who contributed to this
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.
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.
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,
24 CROSS_COMPILE ?
= arm-linux-
26 ifndef CONFIG_STANDALONE_LOAD_ADDR
28 CONFIG_STANDALONE_LOAD_ADDR
= 0x80300000
30 CONFIG_STANDALONE_LOAD_ADDR
= 0xc100000
34 PLATFORM_CPPFLAGS
+= -DCONFIG_ARM
-D__ARM__
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
,)\
43 PF_CPPFLAGS_ARM
:= $(call cc-option
,-marm
,) \
44 $(call cc-option
,-mno-thumb-interwork
,)
48 ifneq ($(CONFIG_SPL_BUILD
),y
)
49 ALL-
$(CONFIG_SYS_THUMB_BUILD
) += checkthumb
52 # Try if EABI is supported, else fall back to old API,
54 # - with ELDK 4.2 (EABI supported), use:
56 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
58 # - with ELDK 3.1 (gcc 3.x), use:
60 PF_CPPFLAGS_ABI
:= $(call cc-option
,\
69 PLATFORM_CPPFLAGS
+= $(PF_CPPFLAGS_ARM
) $(PF_CPPFLAGS_ABI
)
71 # For EABI, make sure to provide raise()
72 ifneq (,$(findstring -mabi
=aapcs-linux
,$(PLATFORM_CPPFLAGS
)))
73 # This file is parsed many times, so the string may get added multiple
74 # times. Also, the prefix needs to be different based on whether
75 # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
76 # before adding the correct one.
77 ifdef CONFIG_SPL_BUILD
78 PLATFORM_LIBS
:= $(SPLTREE
)/arch
/arm
/lib
/eabi_compat.o \
79 $(filter-out %/arch
/arm
/lib
/eabi_compat.o
, $(PLATFORM_LIBS
))
81 PLATFORM_LIBS
:= $(OBJTREE
)/arch
/arm
/lib
/eabi_compat.o \
82 $(filter-out %/arch
/arm
/lib
/eabi_compat.o
, $(PLATFORM_LIBS
))
86 # needed for relocation
87 ifndef CONFIG_NAND_SPL
88 LDFLAGS_u-boot
+= -pie
92 # FIXME: binutils versions < 2.22 have a bug in the assembler where
93 # branches to weak symbols can be incorrectly optimized in thumb mode
94 # to a short branch (b.n instruction) that won't reach when the symbol
97 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532
99 ifeq ($(CONFIG_SYS_THUMB_BUILD
),y
)
100 ifeq ($(GAS_BUG_12532
),)
101 export GAS_BUG_12532
:=$(shell if
[ $(call binutils-version
) -lt
0222 ] ; \
102 then echo y
; else echo n
; fi
)
104 ifeq ($(GAS_BUG_12532
),y
)
105 PLATFORM_RELFLAGS
+= -fno-optimize-sibling-calls