$OpenBSD: patch-freehdl_kernel-util_hh,v 1.1 2017/06/03 14:25:16 espie Exp $
C++11 ambiguity

Index: freehdl/kernel-util.hh
--- freehdl/kernel-util.hh.orig
+++ freehdl/kernel-util.hh
@@ -24,10 +24,10 @@ using namespace __gnu_cxx;
 // A hash function template used tp generate a hash number from
 // pointer values.
 template<class T>
-class pointer_hash : public hash<unsigned long> {
+class pointer_hash : public __gnu_cxx::hash<unsigned long> {
 public:
   size_t operator()(const T& x) const {
-    return (*(hash<unsigned long> *)this)(((unsigned long)x)>>2);
+    return (*(__gnu_cxx::hash<unsigned long> *)this)(((unsigned long)x)>>2);
   }
 };