linkage.exp: Added -m64 to x86_64 linux target native C compilation where required.

	* gcc.misc-tests/linkage.exp: Added -m64 to x86_64 linux target
	native C compilation where required.

From-SVN: r149997

gcc/testsuite/ChangeLog

+2009-07-23  Simon Baldwin  <simonb@google.com>
+
+	* gcc.misc-tests/linkage.exp: Added -m64 to x86_64 linux target
+	native C compilation where required.
+
 2009-07-22  Doug Kwan  <dougkwan@google.com>
 
 	* gcc.c-torture/compile/20090721-1.c: New test.

gcc/testsuite/gcc.misc-tests/linkage.exp

@@ -62,6 +62,9 @@ if { [isnative] && ![is_remote host] } then {
 	    if [ string match "*32-bit*" $file_string ] {
 		set native_cflags "-m32"
 	    }
+	    if [ string match "*64-bit*" $file_string ] {
+		set native_cflags "-m64"
+	    }
 	} elseif [istarget "*-hp-hpux*"] {
 	    set file_string [exec file "linkage-x.o"]
 	    if [ string match "*ELF-64*" $file_string ] {