2 # (C) Copyright 2000-2002
3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 # SPDX-License-Identifier: GPL-2.0+
8 CROSS_COMPILE ?
= arm-linux-
10 ifndef CONFIG_STANDALONE_LOAD_ADDR
11 ifneq ($(CONFIG_OMAP_COMMON
),)
12 CONFIG_STANDALONE_LOAD_ADDR
= 0x80300000
14 CONFIG_STANDALONE_LOAD_ADDR
= 0xc100000
18 LDFLAGS_FINAL
+= --gc-sections
19 PLATFORM_RELFLAGS
+= -ffunction-sections
-fdata-sections \
20 -fno-common
-ffixed-r9
-msoft-float
22 # Support generic board on ARM
23 __HAVE_ARCH_GENERIC_BOARD
:= y
25 PLATFORM_CPPFLAGS
+= -DCONFIG_ARM
-D__ARM__
27 # Choose between ARM/Thumb instruction sets
28 ifeq ($(CONFIG_SYS_THUMB_BUILD
),y
)
29 PF_CPPFLAGS_ARM
:= $(call cc-option
, -mthumb
-mthumb-interwork
,\
30 $(call cc-option
,-marm
,)\
31 $(call cc-option
,-mno-thumb-interwork
,)\
34 PF_CPPFLAGS_ARM
:= $(call cc-option
,-marm
,) \
35 $(call cc-option
,-mno-thumb-interwork
,)
39 ifneq ($(CONFIG_SPL_BUILD
),y
)
40 ALL-
$(CONFIG_SYS_THUMB_BUILD
) += checkthumb
43 # Try if EABI is supported, else fall back to old API,
45 # - with ELDK 4.2 (EABI supported), use:
47 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
49 # - with ELDK 3.1 (gcc 3.x), use:
51 PF_CPPFLAGS_ABI
:= $(call cc-option
,\
60 PLATFORM_CPPFLAGS
+= $(PF_CPPFLAGS_ARM
) $(PF_CPPFLAGS_ABI
)
62 # For EABI, make sure to provide raise()
63 ifneq (,$(findstring -mabi
=aapcs-linux
,$(PLATFORM_CPPFLAGS
)))
64 # This file is parsed many times, so the string may get added multiple
65 # times. Also, the prefix needs to be different based on whether
66 # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
67 # before adding the correct one.
68 ifdef CONFIG_SPL_BUILD
69 PLATFORM_LIBS
:= $(SPLTREE
)/arch
/arm
/lib
/eabi_compat.o \
70 $(filter-out %/arch
/arm
/lib
/eabi_compat.o
, $(PLATFORM_LIBS
))
72 PLATFORM_LIBS
:= $(OBJTREE
)/arch
/arm
/lib
/eabi_compat.o \
73 $(filter-out %/arch
/arm
/lib
/eabi_compat.o
, $(PLATFORM_LIBS
))
77 # needed for relocation
78 LDFLAGS_u-boot
+= -pie
81 # FIXME: binutils versions < 2.22 have a bug in the assembler where
82 # branches to weak symbols can be incorrectly optimized in thumb mode
83 # to a short branch (b.n instruction) that won't reach when the symbol
86 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532
88 ifeq ($(CONFIG_SYS_THUMB_BUILD
),y
)
89 ifeq ($(GAS_BUG_12532
),)
90 export GAS_BUG_12532
:=$(shell if
[ $(call binutils-version
) -lt
0222 ] ; \
91 then echo y
; else echo n
; fi
)
93 ifeq ($(GAS_BUG_12532
),y
)
94 PLATFORM_RELFLAGS
+= -fno-optimize-sibling-calls
98 ifneq ($(CONFIG_SPL_BUILD
),y
)
99 # Check that only R_ARM_RELATIVE relocations are generated.
100 ALL-y
+= checkarmreloc
101 # The movt / movw can hardcode 16 bit parts of the addresses in the
102 # instruction. Relocation is not supported for that case, so disable
103 # such usage by requiring word relocations.
104 PLATFORM_CPPFLAGS
+= $(call cc-option
, -mword-relocations
)
107 # limit ourselves to the sections we want in the .bin.
108 OBJCFLAGS
+= -j .text
-j .rodata
-j .data
-j .u_boot_list
-j .rel.dyn