2019-02-19  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/89402
	* src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
	_GLIBCXX_PURE to the alias declaration.

--- libstdc++-v3/src/c++98/compatibility-ldbl.cc.jj	2019-01-01 12:39:41.530606161 +0100
+++ libstdc++-v3/src/c++98/compatibility-ldbl.cc	2019-02-19 16:12:52.402123217 +0100
@@ -75,6 +75,6 @@ namespace std _GLIBCXX_VISIBILITY(defaul
 // and std::hash<long double>::operator()
 // are the same, no need to duplicate them.
 extern "C" void _ZNKSt4hashIeEclEe (void)
-  __attribute__((alias ("_ZNKSt3tr14hashIeEclEe")));
+  _GLIBCXX_PURE __attribute__((alias ("_ZNKSt3tr14hashIeEclEe")));
 
 #endif