if SOFTFLOAT_FOR_GCC is not defined, don't declare float_detect_tininess.

lib/libc/arch/sparc64/softfloat/softfloat.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: softfloat.h,v 1.4 2002/05/12 13:12:47 bjh21 Exp $	*/
+/*	$NetBSD: softfloat.h,v 1.5 2006/05/11 23:53:14 mrg Exp $	*/
 
 /* This is a derivative work. */
 
@@ -72,7 +72,9 @@ typedef struct {
 Software IEC/IEEE floating-point underflow tininess-detection mode.
 -------------------------------------------------------------------------------
 */
+#ifndef SOFTFLOAT_FOR_GCC
 extern int8 float_detect_tininess;
+#endif
 enum {
     float_tininess_after_rounding  = 0,
     float_tininess_before_rounding = 1