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patches/gcc/4.2.1/240-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 313 2f223aafc7cb
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-4.2.1.orig/gcc/config/arm/linux-elf.h gcc-4.2.1/gcc/config/arm/linux-elf.h

     2 --- gcc-4.2.1.orig/gcc/config/arm/linux-elf.h	2006-02-17 00:29:10.000000000 +0100

     3 +++ gcc-4.2.1/gcc/config/arm/linux-elf.h	2007-08-03 20:36:43.000000000 +0200

     4 @@ -28,19 +28,33 @@

     5  #undef  TARGET_VERSION

     6  #define TARGET_VERSION  fputs (" (ARM GNU/Linux with ELF)", stderr);

     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 MASK_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  #undef  TARGET_DEFAULT_FLOAT_ABI

    23  #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD

    24  

    25  #undef  TARGET_DEFAULT

    26 -#define TARGET_DEFAULT (0)

    27 +#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT)

    28  

    29  #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6

    30  

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

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

    33  

    34  #undef  MULTILIB_DEFAULTS

    35  #define MULTILIB_DEFAULTS \

    36 -	{ "marm", "mlittle-endian", "mhard-float", "mno-thumb-interwork" }

    37 +	{ "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mno-thumb-interwork" }

    38  

    39  /* Now we define the strings used to build the spec file.  */

    40  #undef  LIB_SPEC

    41 @@ -61,7 +75,7 @@

    42     %{rdynamic:-export-dynamic} \

    43     %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "} \

    44     -X \

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

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

    47     SUBTARGET_EXTRA_LINK_SPEC

    48  

    49  #undef  LINK_SPEC

    50 diff -durN gcc-4.2.1.orig/gcc/config.gcc gcc-4.2.1/gcc/config.gcc

    51 --- gcc-4.2.1.orig/gcc/config.gcc	2007-08-03 20:29:52.000000000 +0200

    52 +++ gcc-4.2.1/gcc/config.gcc	2007-08-03 20:36:43.000000000 +0200

    53 @@ -705,6 +705,11 @@

    54  	tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h"

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

    56  	case ${target} in

    57 +	arm*b-*)

    58 +		tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"

    59 +		;;

    60 +	esac

    61 +	case ${target} in

    62  	arm*-*-linux-*eabi)

    63  	    tm_file="$tm_file arm/bpabi.h arm/linux-eabi.h"

    64  	    tmake_file="$tmake_file arm/t-arm-elf arm/t-bpabi arm/t-linux-eabi"
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