The Linux variant of GCC has no need of defining "i386", so it doesn't.

That renders this test ineffective and the "defined( i386 )" remains
unaltered by fixinc.  This test is now, generally, a noop.

From-SVN: r57847

gcc/fixinc/tests/base/testing.h

@@ -71,7 +71,7 @@ extern __ptr_t memcpy __P ((__ptr_t __dest, __const __ptr_t __src,
 
 #if defined( MACHINE_NAME_CHECK )
 /* MACH_DIFF: */
-#if defined( __i386__ ) || defined( sparc ) || defined( vax )
+#if defined( i386 ) || defined( sparc ) || defined( vax )
 /* no uniform test, so be careful  :-) */
 #endif  /* MACHINE_NAME_CHECK */