yann@1: By Lennert Buytenhek <buytenh@wantstofly.org>
yann@1: Adds support for arm*b-linux* big-endian ARM targets
yann@1: 
yann@1: Fixes build error
yann@1: 
yann@1: /opt/crosstool/armeb-unknown-linux-gnu/gcc-3.4.2-glibc-2.3.3/armeb-unknown-linux-gnu/bin/ld: unrecognised emulation mode: armelf_linux
yann@1: Supported emulations: armelfb_linux armelfb
yann@1: collect2: ld returned 1 exit status
yann@1: make[2]: *** [/home/dank/wk/crosstool-0.28-rc36/build/armeb-unknown-linux-gnu/gcc-3.4.2-glibc-2.3.3/build-glibc/csu/crt1.o] Error 1
yann@1: make[2]: Leaving directory `/home/dank/wk/crosstool-0.28-rc36/build/armeb-unknown-linux-gnu/gcc-3.4.2-glibc-2.3.3/glibc-2.3.3/csu'
yann@1: make[1]: *** [csu/subdir_lib] Error 2
yann@1: make[1]: Leaving directory `/home/dank/wk/crosstool-0.28-rc36/build/armeb-unknown-linux-gnu/gcc-3.4.2-glibc-2.3.3/glibc-2.3.3'
yann@1: make: *** [all] Error 2
yann@1: 
yann@1: 
yann@1: See http://gcc.gnu.org/PR16350
yann@1: 
yann@1: diff -urN gcc-3.4.0.orig/gcc/config/arm/linux-elf.h gcc-3.4.0/gcc/config/arm/linux-elf.h
yann@1: --- gcc-3.4.0.orig/gcc/config/arm/linux-elf.h	2004-01-31 07:18:11.000000000 +0100
yann@1: +++ gcc-3.4.0/gcc/config/arm/linux-elf.h	2004-07-02 14:46:29.225443757 +0200
yann@1: @@ -30,17 +30,34 @@
yann@1:  /* Do not assume anything about header files.  */
yann@1:  #define NO_IMPLICIT_EXTERN_C
yann@1:  
yann@1: +/*
yann@1: + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
yann@1: + * (big endian) configurations.
yann@1: + */
yann@1: +#if TARGET_BIG_ENDIAN_DEFAULT
yann@1: +#define TARGET_ENDIAN_DEFAULT ARM_FLAG_BIG_END
yann@1: +#define TARGET_ENDIAN_OPTION "mbig-endian"
yann@1: +#define TARGET_LINKER_EMULATION "armelfb_linux"
yann@1: +#else
yann@1: +#define TARGET_ENDIAN_DEFAULT 0
yann@1: +#define TARGET_ENDIAN_OPTION "mlittle-endian"
yann@1: +#define TARGET_LINKER_EMULATION "armelf_linux"
yann@1: +#endif
yann@1: +
yann@1:  /* Default is to use APCS-32 mode.  */
yann@1:  #undef  TARGET_DEFAULT
yann@1: -#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS)
yann@1: +#define TARGET_DEFAULT \
yann@1: +		( ARM_FLAG_APCS_32 | \
yann@1: +		  ARM_FLAG_MMU_TRAPS | \
yann@1: +		  TARGET_ENDIAN_DEFAULT )
yann@1:  
yann@1:  #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
yann@1:  
yann@1: -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"
yann@1: +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"
yann@1:  
yann@1:  #undef  MULTILIB_DEFAULTS
yann@1:  #define MULTILIB_DEFAULTS \
yann@1: -	{ "marm", "mlittle-endian", "mhard-float", "mapcs-32", "mno-thumb-interwork" }
yann@1: +	{ "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mapcs-32", "mno-thumb-interwork" }
yann@1:  
yann@1:  #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
yann@1:  
yann@1: @@ -89,7 +106,7 @@
yann@1:     %{rdynamic:-export-dynamic} \
yann@1:     %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \
yann@1:     -X \
yann@1: -   %{mbig-endian:-EB}" \
yann@1: +   %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
yann@1:     SUBTARGET_EXTRA_LINK_SPEC
yann@1:  
yann@1:  #define TARGET_OS_CPP_BUILTINS() LINUX_TARGET_OS_CPP_BUILTINS()
yann@1: diff -urN gcc-3.4.0.orig/gcc/config.gcc gcc-3.4.0/gcc/config.gcc
yann@1: --- gcc-3.4.0.orig/gcc/config.gcc	2004-04-17 04:28:24.000000000 +0200
yann@1: +++ gcc-3.4.0/gcc/config.gcc	2004-07-02 14:44:40.045822542 +0200
yann@1: @@ -666,6 +666,11 @@
yann@1:  	;;
yann@1:  arm*-*-linux*)			# ARM GNU/Linux with ELF
yann@1:  	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"
yann@1: +	case $target in
yann@1: +	arm*b-*)
yann@1: +		tm_defines="TARGET_BIG_ENDIAN_DEFAULT=1 $tm_defines"
yann@1: +		;;
yann@1: +	esac
yann@1:  	tmake_file="t-slibgcc-elf-ver t-linux arm/t-linux"
yann@1:  	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
yann@1:  	gnu_ld=yes