builtins-config.h: Use underscore macro style for __sun system type.

	* gcc.dg/builtins-config.h: Use underscore macro style for __sun
	system type.  Add check for irix6 which doesn't have c99 runtime.

From-SVN: r78879

gcc/testsuite/ChangeLog

+2004-03-03  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* gcc.dg/builtins-config.h: Use underscore macro style for __sun
+	system type.  Add check for irix6 which doesn't have c99 runtime.
+
 2004-03-03  Bob Wilson  <bob.wilson@acm.org>
 
 	* gcc.dg/const-elim-1.c: xfail for xtensa.

gcc/testsuite/gcc.dg/builtins-config.h

@@ -11,8 +11,10 @@
 
 #if defined(__hppa) && defined(__hpux)
 /* PA HP-UX doesn't have the entire C99 runtime.  */
-#elif defined(sun)
+#elif defined(__sun)
 /* Solaris doesn't have the entire C99 runtime.  */
+#elif defined(__sgi)
+/* Irix6 doesn't have the entire C99 runtime.  */
 #else
 /* Newlib has the "f" variants of the math functions, but not the "l"
    variants.  TARGET_C99_FUNCTIONS is only defined if all C99