--- cider/common/src/lib/support/erfc.c.orig	Sat Jan 29 19:29:27 1994
+++ cider/common/src/lib/support/erfc.c	Tue Oct 24 12:23:09 2000
@@ -10,6 +10,7 @@
 
 /* erfc computes the erfc(x) the code is from sedan's derfc.f */
 
+#ifdef HAS_NO_ERFC
 double erfc ( x )
 double x;
 {
@@ -46,4 +47,4 @@
         return( 1.0 - sum2 );
     }
 }
-
+#endif