Introduce target-specific LDFLAGS, the same way we have CFLAGS for the target.
It seems to be helping gcc somewhat into telling the correct endianness to ld that sticks with little endian even when the target is big (eg armeb-unknown-linux-uclibcgnueabi).
There's still work to do, especially finish the gcc part that is not in this commit.
/trunk/scripts/functions | 9 7 2 0 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
1 By Lennert Buytenhek <buytenh@wantstofly.org>
2 Adds support for arm*b-linux* big-endian ARM targets
4 See http://gcc.gnu.org/PR16350
6 --- gcc-4.0.3/gcc/config/arm/linux-elf.h
7 +++ gcc-4.0.3/gcc/config/arm/linux-elf.h
9 /* Do not assume anything about header files. */
10 #define NO_IMPLICIT_EXTERN_C
13 + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
14 + * (big endian) configurations.
16 +#if TARGET_BIG_ENDIAN_DEFAULT
17 +#define TARGET_ENDIAN_DEFAULT ARM_FLAG_BIG_END
18 +#define TARGET_ENDIAN_OPTION "mbig-endian"
19 +#define TARGET_LINKER_EMULATION "armelfb_linux"
21 +#define TARGET_ENDIAN_DEFAULT 0
22 +#define TARGET_ENDIAN_OPTION "mlittle-endian"
23 +#define TARGET_LINKER_EMULATION "armelf_linux"
26 #undef TARGET_DEFAULT_FLOAT_ABI
27 #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
30 -#define TARGET_DEFAULT (0)
31 +#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT)
33 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
35 -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"
36 +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"
38 #undef MULTILIB_DEFAULTS
39 #define MULTILIB_DEFAULTS \
40 - { "marm", "mlittle-endian", "mhard-float", "mno-thumb-interwork" }
41 + { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mno-thumb-interwork" }
43 /* The GNU C++ standard library requires that these macros be defined. */
44 #undef CPLUSPLUS_CPP_SPEC
46 %{rdynamic:-export-dynamic} \
47 %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \
49 - %{mbig-endian:-EB}" \
50 + %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
51 SUBTARGET_EXTRA_LINK_SPEC
53 #define TARGET_OS_CPP_BUILTINS() \
54 --- gcc-4.0.3/gcc/config.gcc
55 +++ gcc-4.0.3/gcc/config.gcc
58 arm*-*-linux*) # ARM GNU/Linux with ELF
59 tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h arm/aout.h arm/arm.h"
62 + tm_defines="TARGET_BIG_ENDIAN_DEFAULT=1 $tm_defines"
65 tmake_file="${tmake_file} arm/t-arm arm/t-linux"
66 extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"