re PR c++/48883 (?: ternary operator fails in certain contexts - link error)

	PR c++/48883
	PR c++/49609
	* pt.c (resolve_nondeduced_context): Call mark_used.

From-SVN: r175764

gcc/cp/ChangeLog

 2011-07-01  Jason Merrill  <jason@redhat.com>
 
+	PR c++/48883
+	PR c++/49609
+	* pt.c (resolve_nondeduced_context): Call mark_used.
+
 	PR c++/49085
 	* semantics.c (finish_offsetof): Complain about incomplete type.
 

gcc/cp/pt.c

@@ -14679,6 +14679,7 @@ resolve_nondeduced_context (tree orig_expr)
 	}
       if (good == 1)
 	{
+	  mark_used (goodfn);
 	  expr = goodfn;
 	  if (baselink)
 	    expr = build_baselink (BASELINK_BINFO (baselink),

gcc/testsuite/ChangeLog

 2011-07-01  Jason Merrill  <jason@redhat.com>
 
+	PR c++/48883
+	* g++.dg/template/explicit-args4.C: New.
+
 	PR c++/49085
 	* g++.dg/template/offsetof2.C: New.
 

gcc/testsuite/g++.dg/template/explicit-args4.C

+// PR c++/48883
+// { dg-do link }
+
+template<typename T>
+T myMax(T a, T b) {
+   if(a < b) return a;
+   return b;
+}
+
+int main() {
+   bool even = true;
+   int (*fp)(int, int);
+   fp = even ? myMax<int> : myMax<int>;   /* yields link error */
+}