Oddly, this case wasn't tested before.
Tested x86_64-pc-linux-gnu, applying to trunk.
commit b5879e54d61597e2255fd6a25affcb24862f2844
Author: Jason Merrill <ja...@redhat.com>
Date: Fri Aug 8 10:16:43 2014 -0400
* pt.c (lookup_template_class_1): Copy abi_tag.
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index 30d8950..2592172 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -7813,6 +7813,12 @@ lookup_template_class_1 (tree d1, tree arglist, tree in_decl, tree context,
}
}
+ if (OVERLOAD_TYPE_P (t)
+ && !DECL_ALIAS_TEMPLATE_P (gen_tmpl))
+ if (tree attributes
+ = lookup_attribute ("abi_tag", TYPE_ATTRIBUTES (template_type)))
+ TYPE_ATTRIBUTES (t) = attributes;
+
/* Let's consider the explicit specialization of a member
of a class template specialization that is implicitly instantiated,
e.g.:
diff --git a/gcc/testsuite/g++.dg/abi/abi-tag8.C b/gcc/testsuite/g++.dg/abi/abi-tag8.C
new file mode 100644
index 0000000..0a6eb58
--- /dev/null
+++ b/gcc/testsuite/g++.dg/abi/abi-tag8.C
@@ -0,0 +1,9 @@
+// { dg-options "-Wabi-tag" }
+
+template<class T>
+struct __attribute ((__abi_tag__("cxx11"))) list // { dg-message "list" }
+{ };
+
+struct X { // { dg-warning "abi tag" }
+ list<int> l; // { dg-message "X::l" }
+};
