c++: Add test for PR 68061.

	PR c++/68061
	* g++.dg/concepts/attrib1.C: New.

diff --git a/gcc/testsuite/g++.dg/concepts/attrib1.C b/gcc/testsuite/g++.dg/concepts/attrib1.C
new file mode 100644 (file)
index 0000000..7563ea6
--- /dev/null
+++ b/gcc/testsuite/g++.dg/concepts/attrib1.C
@@ -0,0 +1,6 @@
+// PR c++/68061
+// { dg-do compile { target c++11 } }
+
+template <class T>
+  requires true                        // { dg-error "requires" "" { target { ! concepts } } }
+[[deprecated]] void f(T);