PR c++/86342 - -Wdeprecated-copy and system headers.

	* decl2.c (cp_warn_deprecated_use): Don't warn about declarations
	in system headers.

From-SVN: r262231

gcc/cp/ChangeLog

+2018-06-28  Jason Merrill  <jason@redhat.com>
+
+	PR c++/86342 - -Wdeprecated-copy and system headers.
+	* decl2.c (cp_warn_deprecated_use): Don't warn about declarations
+	in system headers.
+
 2018-06-27  David Malcolm  <dmalcolm@redhat.com>
 
 	PR c++/86329

gcc/cp/decl2.c

@@ -5208,8 +5208,10 @@ cp_warn_deprecated_use (tree decl, tsubst_flags_t complain)
       && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
       && copy_fn_p (decl))
     {
-      warned = warning (OPT_Wdeprecated_copy,
-			"implicitly-declared %qD is deprecated", decl);
+      /* Don't warn about system library classes (c++/86342).  */
+      if (!DECL_IN_SYSTEM_HEADER (decl))
+	warned = warning (OPT_Wdeprecated_copy,
+			  "implicitly-declared %qD is deprecated", decl);
       if (warned)
 	{
 	  tree ctx = DECL_CONTEXT (decl);

gcc/testsuite/g++.dg/cpp0x/depr-copy2.C

+// PR c++/86342
+// { dg-options -Wdeprecated-copy }
+
+# 1 "deprcopy.cc"
+# 1 "deprcopy.h" 1 3
+
+struct X {
+  X() { }
+  ~X() { }
+};
+# 2 "deprcopy.cc" 2
+
+int main()
+{
+  X x;
+  X y = x;
+}