Condition builtins-8.c cbrt test on HAVE_C99_RUNTIME

[Joseph S. Myers]

gcc.dg/builtins-8.c contains a test of cbrt, a C99 function, which should 
be conditional on HAVE_C99_RUNTIME (otherwise GCC does not do the 
optimization being tested, even if the system does in fact have cbrt).  OK 
to commit this patch to fix the test?

2008-09-11  Joseph Myers  <joseph@codesourcery.com>

	* gcc.dg/builtins-8.c: Condition cbrt test on HAVE_C99_RUNTIME.

Index: gcc.dg/builtins-8.c
===================================================================
--- gcc.dg/builtins-8.c	(revision 140170)
+++ gcc.dg/builtins-8.c	(working copy)
@@ -27,8 +27,10 @@
   if (pow(x,0.5) != sqrt(x))
     abort ();
 
+#ifdef HAVE_C99_RUNTIME
   if (pow(x,1.0/3.0) != cbrt(x))
     abort ();
+#endif
 }
 
 int main()

-- 
Joseph S. Myers
joseph@codesourcery.com