diff -Naur grace-5.1.21.orig/configure grace-5.1.21/configure
--- grace-5.1.21.orig/configure	2007-02-16 17:44:49.000000000 -0500
+++ grace-5.1.21/configure	2008-04-03 08:54:45.000000000 -0400
@@ -15181,7 +15181,11 @@
       int main(void) {
         char *vlib;
         vlib = nc_inq_libvers();
-        if (strcmp(vlib, "3.0") < 0) {
+	/* nc_inq_libvers() has changed.  It now returns a long string,
+	   a portion of which is in quotes. Advance the pointer to 
+	   eliminate the first quote, then compare.  But also need
+           to ensure backward compatibility. */
+        if ((strcmp(vlib, "3.0") || strcmp(++vlib, "3.0")) < 0) {
           exit(1);
         }
         exit(0);