gcc-3.4.0-arm-bigendian.patch

linux下编译交叉工具链的工具源码

By Lennert Buytenhek <[e-mail]>
Adds support for arm*b-linux* big-endian ARM targets

Fixes build error

/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
Supported emulations: armelfb_linux armelfb
collect2: ld returned 1 exit status
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
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'
make[1]: *** [csu/subdir_lib] Error 2
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'
make: *** [all] Error 2


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

diff -urN gcc-3.4.0.orig/gcc/config/arm/linux-elf.h gcc-3.4.0/gcc/config/arm/linux-elf.h
--- gcc-3.4.0.orig/gcc/config/arm/linux-elf.h	2004-01-31 07:18:11.000000000 +0100
+++ gcc-3.4.0/gcc/config/arm/linux-elf.h	2004-07-02 14:46:29.225443757 +0200
@@ -30,17 +30,34 @@
 /* Do not assume anything about header files.  */
 #define NO_IMPLICIT_EXTERN_C
 
+/*
+ * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
+ * (big endian) configurations.
+ */
+#if TARGET_BIG_ENDIAN_DEFAULT
+#define TARGET_ENDIAN_DEFAULT ARM_FLAG_BIG_END
+#define TARGET_ENDIAN_OPTION "mbig-endian"
+#define TARGET_LINKER_EMULATION "armelfb_linux"
+#else
+#define TARGET_ENDIAN_DEFAULT 0
+#define TARGET_ENDIAN_OPTION "mlittle-endian"
+#define TARGET_LINKER_EMULATION "armelf_linux"
+#endif
+
 /* Default is to use APCS-32 mode.  */
 #undef  TARGET_DEFAULT
-#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS)
+#define TARGET_DEFAULT \
+		( ARM_FLAG_APCS_32 | \
+		  ARM_FLAG_MMU_TRAPS | \
+		  TARGET_ENDIAN_DEFAULT )
 
 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
 
-#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"
+#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"
 
 #undef  MULTILIB_DEFAULTS
 #define MULTILIB_DEFAULTS \
-	{ "marm", "mlittle-endian", "mhard-float", "mapcs-32", "mno-thumb-interwork" }
+	{ "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mapcs-32", "mno-thumb-interwork" }
 
 #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
 
@@ -89,7 +106,7 @@
    %{rdynamic:-export-dynamic} \
    %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \
    -X \
-   %{mbig-endian:-EB}" \
+   %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
    SUBTARGET_EXTRA_LINK_SPEC
 
 #define TARGET_OS_CPP_BUILTINS() LINUX_TARGET_OS_CPP_BUILTINS()
diff -urN gcc-3.4.0.orig/gcc/config.gcc gcc-3.4.0/gcc/config.gcc
--- gcc-3.4.0.orig/gcc/config.gcc	2004-04-17 04:28:24.000000000 +0200
+++ gcc-3.4.0/gcc/config.gcc	2004-07-02 14:44:40.045822542 +0200
@@ -666,6 +666,11 @@
 	;;
 arm*-*-linux*)			# ARM GNU/Linux with ELF
 	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"
+	case $target in
+	arm*b-*)
+		tm_defines="TARGET_BIG_ENDIAN_DEFAULT=1 $tm_defines"
+		;;
+	esac
 	tmake_file="t-slibgcc-elf-ver t-linux arm/t-linux"
 	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
 	gnu_ld=yes