--- gfan0.7/src/gfanlib_q.h.orig	2024-08-12 10:00:15.000000000 -0600
+++ gfan0.7/src/gfanlib_q.h	2024-08-16 10:13:16.625990374 -0600
@@ -179,6 +179,11 @@ public:
     assert(0 && "gcd for Rational not defined");
     return a;
   }
+  static Rational gcd(Rational const &a, Rational const &b)
+  {
+    assert(0 && "gcd for Rational not defined");
+    return a;
+  }
   /**
    * Assigns the value to q. q must have been initialized as a gmp variable.
    */