add x86_64 support

 /* A C statement (sans semicolon) to output to the stdio stream

    FILE the assembler definition of uninitialized global DECL named

--- gcc-3.4.4/gcc/config/i386/linux64.h

+++ gcc-3.4.4/gcc/config/i386/linux64.h

@@ -55,6 +55,15 @@

    done.  */

 #undef	LINK_SPEC

+#if defined USE_UCLIBC

+#define LINK_SPEC "%{!m32:-m elf_x86_64} %{m32:-m elf_i386} \

+  %{shared:-shared} \

+  %{!shared: \

+    %{!static: \

+      %{rdynamic:-export-dynamic} \

+      %{!dynamic-linker:-dynamic-linker /lib/ld-uClibc.so.0}} \

+    %{static:-static}}"

+#else

 #define LINK_SPEC "%{!m32:-m elf_x86_64} %{m32:-m elf_i386} \

   %{shared:-shared} \

   %{!shared: \

@@ -63,6 +73,7 @@

       %{m32:%{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \

       %{!m32:%{!dynamic-linker:-dynamic-linker /lib64/ld-linux-x86-64.so.2}}} \

     %{static:-static}}"

+#endif

 #define MULTILIB_DEFAULTS { "m64" }

diff -urN gcc-3.4.1-dist/gcc/config/mips/linux.h gcc-3.4.1/gcc/config/mips/linux.h

--- gcc-3.4.1-dist/gcc/config/mips/linux.h	2004-06-15 20:42:24.000000000 -0500

+++ gcc-3.4.1/gcc/config/mips/linux.h	2004-08-12 15:54:43.000000000 -0500

 i[34567]86-*-linux*)	# Intel 80386's running GNU/Linux

 			# with ELF format using glibc 2

 			# aka GNU/Linux C library 6

@@ -1032,7 +1032,11 @@

 x86_64-*-linux*)

 	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h svr4.h linux.h \

 		 i386/x86-64.h i386/linux64.h"

-	tmake_file="t-slibgcc-elf-ver t-linux i386/t-linux64"

+	tmake_file="t-slibgcc-elf-ver i386/t-linux64"

+	case ${target} in

+	*-linux-uclibc*) tmake_file="${tmake_file} t-linux-uclibc" ;;

+	*) tmake_file="${tmake_file} t-linux" ;;

+	esac

 	;;

 i[34567]86-*-kfreebsd*-gnu) # must be before i[34567]86-*-gnu*

 	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h svr4.h linux.h i386/linux.h kfreebsdgnu.h i386/kfreebsdgnu.h"

@@ -1547,6 +1562,16 @@

 	gnu_ld=yes

 	gas=yes