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patches/gcc/4.2.3/240-arm-bigendian.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Jul 17 22:43:07 2011 +0200 (2011-07-17)
changeset 2893 a8a65758664f
parent 431 8bde4c6ea47a
permissions -rw-r--r--
cc/gcc: do not use the core pass-2 to build the baremetal compiler

In case we build a baremetal compiler, use the standard passes:
- core_cc is used to build the C library;
- as such, it is meant to run on build, not host;
- the final compiler is meant to run on host;

As the current final compiler step can not build a baremetal compiler,
call the core backend from the final step.

NB: Currently, newlib is built during the start_files pass, so we have
to have a core compiler by then... Once we can build the baremetal
compiler from the final cc step, then we can move the newlib build to
the proper step, and then get rid of the core pass-1 static compiler...

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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