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patches/gcc/4.0.3/180-arm-bigendian.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Tue Sep 23 14:48:10 2008 +0000 (2008-09-23)
changeset 872 fd4bf138f08f
parent 1 eeea35fbf182
permissions -rw-r--r--
Bart De VOS pointed out that removing absolute paths from the libc linker scripts is plainly wrong.
It dates from dawn ages of the original crosstool code, and is not well explained. At that time, binutils might not understand the sysroot stuff, and it was necessary to remove absolute paths in that case.

/trunk/scripts/build/libc/glibc.sh | 14 2 12 0 ++------------
1 file changed, 2 insertions(+), 12 deletions(-) 
     1 By Lennert Buytenhek <buytenh@wantstofly.org>

     2 Adds support for arm*b-linux* big-endian ARM targets

     3 

     4 See http://gcc.gnu.org/PR16350

     5 

     6 --- gcc-4.0.3/gcc/config/arm/linux-elf.h

     7 +++ gcc-4.0.3/gcc/config/arm/linux-elf.h

     8 @@ -31,19 +31,33 @@

     9  /* Do not assume anything about header files.  */

    10  #define NO_IMPLICIT_EXTERN_C

    11  

    12 +/*

    13 + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*

    14 + * (big endian) configurations.

    15 + */

    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"

    20 +#else

    21 +#define TARGET_ENDIAN_DEFAULT 0

    22 +#define TARGET_ENDIAN_OPTION "mlittle-endian"

    23 +#define TARGET_LINKER_EMULATION "armelf_linux"

    24 +#endif

    25 +

    26  #undef  TARGET_DEFAULT_FLOAT_ABI

    27  #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD

    28  

    29  #undef  TARGET_DEFAULT

    30 -#define TARGET_DEFAULT (0)

    31 +#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT)

    32  

    33  #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6

    34  

    35 -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"

    36 +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"

    37  

    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" }

    42  

    43  /* The GNU C++ standard library requires that these macros be defined.  */

    44  #undef CPLUSPLUS_CPP_SPEC

    45 @@ -90,7 +104,7 @@

    46     %{rdynamic:-export-dynamic} \

    47     %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \

    48     -X \

    49 -   %{mbig-endian:-EB}" \

    50 +   %{mbig-endian:-EB} %{mlittle-endian:-EL}" \

    51     SUBTARGET_EXTRA_LINK_SPEC

    52  

    53  #define TARGET_OS_CPP_BUILTINS()		\

    54 --- gcc-4.0.3/gcc/config.gcc

    55 +++ gcc-4.0.3/gcc/config.gcc

    56 @@ -672,6 +672,11 @@

    57  	;;

    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"

    60 +	case $target in

    61 +	arm*b-*)

    62 +		tm_defines="TARGET_BIG_ENDIAN_DEFAULT=1 $tm_defines"

    63 +		;;

    64 +	esac

    65  	tmake_file="${tmake_file} arm/t-arm arm/t-linux"

    66  	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"

    67  	gnu_ld=yes
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