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patches/gcc/3.4.6/220-arm-bigendian.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sat Dec 31 18:47:37 2011 +0100 (2011-12-31)
changeset 2829 0c3c95f911ec
parent 339 bd5e0a849352
permissions -rw-r--r--
docs: credit Konrad EISELE for the initial multilib support

Konrad submitted an initial patch adding multlib support:
http://sourceware.org/ml/crossgcc/2011-11/msg00040.html

The patch was full of good ideas, but had a few issues, so
I (Yann E. MORIN) started it all from scatch, re-using part
of the original patch. This got implemented in this series:
hg log -r 446a17b5dd1e:e47d17391ae3

As I forgot to credit Konrad in these changelogs, update the
docs so that the work by Konrad gets credited. Without his
initial effort, we would probably not have had multlib support
so soon. Thank you Konrad!

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 diff -durN gcc-3.4.6.orig/gcc/config/arm/linux-elf.h gcc-3.4.6/gcc/config/arm/linux-elf.h

     2 --- gcc-3.4.6.orig/gcc/config/arm/linux-elf.h	2007-08-15 22:51:01.000000000 +0200

     3 +++ gcc-3.4.6/gcc/config/arm/linux-elf.h	2007-08-15 23:05:42.000000000 +0200

     4 @@ -30,17 +30,34 @@

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

     6  #define NO_IMPLICIT_EXTERN_C

     7  

     8 +/*

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

    10 + * (big endian) configurations.

    11 + */

    12 +#if TARGET_BIG_ENDIAN_DEFAULT

    13 +#define TARGET_ENDIAN_DEFAULT ARM_FLAG_BIG_END

    14 +#define TARGET_ENDIAN_OPTION "mbig-endian"

    15 +#define TARGET_LINKER_EMULATION "armelfb_linux"

    16 +#else

    17 +#define TARGET_ENDIAN_DEFAULT 0

    18 +#define TARGET_ENDIAN_OPTION "mlittle-endian"

    19 +#define TARGET_LINKER_EMULATION "armelf_linux"

    20 +#endif

    21 +

    22  /* Default is to use APCS-32 mode.  */

    23  #undef  TARGET_DEFAULT

    24 -#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS)

    25 +#define TARGET_DEFAULT \

    26 +		( ARM_FLAG_APCS_32 | \

    27 +		  ARM_FLAG_MMU_TRAPS | \

    28 +		  TARGET_ENDIAN_DEFAULT )

    29  

    30  #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6

    31  

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

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

    34  

    35  #undef  MULTILIB_DEFAULTS

    36  #define MULTILIB_DEFAULTS \

    37 -	{ "marm", "mlittle-endian", "mhard-float", "mapcs-32", "mno-thumb-interwork" }

    38 +	{ "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mapcs-32", "mno-thumb-interwork" }

    39  

    40  #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"

    41  

    42 @@ -94,7 +111,7 @@

    43     %{rdynamic:-export-dynamic} \

    44     %{!dynamic-linker:-dynamic-linker " ELF_DYNAMIC_LINKER "} \

    45     -X \

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

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

    48     SUBTARGET_EXTRA_LINK_SPEC

    49  

    50  #define TARGET_OS_CPP_BUILTINS() LINUX_TARGET_OS_CPP_BUILTINS()

    51 diff -durN gcc-3.4.6.orig/gcc/config.gcc gcc-3.4.6/gcc/config.gcc

    52 --- gcc-3.4.6.orig/gcc/config.gcc	2007-08-15 22:51:01.000000000 +0200

    53 +++ gcc-3.4.6/gcc/config.gcc	2007-08-15 23:05:42.000000000 +0200

    54 @@ -678,6 +678,11 @@

    55  	;;

    56  arm*-*-linux*)			# ARM GNU/Linux with ELF

    57  	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"

    58 +	case $target in

    59 +	arm*b-*)

    60 +		tm_defines="TARGET_BIG_ENDIAN_DEFAULT=1 $tm_defines"

    61 +		;;

    62 +	esac

    63  	tmake_file="t-slibgcc-elf-ver t-linux arm/t-linux"

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

    65  	gnu_ld=yes
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