Boost C++ Libraries: Ticket #10159: GCC 4.4 error sorry, unimplemented

owner, status changed

viboes — Sun, 29 Jun 2014 14:11:43 GMT

owner changed from Anthony Williams to viboes
status new → assigned

This is a gcc bug (See http://stackoverflow.com/questions/1989552/gcc-error-with-variadic-templates-sorry-unimplemented-cannot-expand-identi).

I have no time to find a workaround for it. If you could provide a patch I would try to apply it.

viboes — Fri, 05 Sep 2014 20:12:57 GMT

Hi, could you try this patch?

git diff include/boost/thread/future.hpp
diff --git a/include/boost/thread/future.hpp b/include/boost/thread/future.hpp
index 6443ba9..2c235ea 100644
--- a/include/boost/thread/future.hpp
+++ b/include/boost/thread/future.hpp
@@ -3866,7 +3866,9 @@ namespace detail {
     // future<R> async(Executor& ex, F&&, ArgTypes&&...);
     ////////////////////////////////
-#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+//#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+#if defined(BOOST_THREAD_PROVIDES_INVOKE) && ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && ! defined(BOOST_NO_CXX11_HDR_TUPLE)
+
 #if defined BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR
   template <class Executor, class R, class... ArgTypes>

Sat, 06 Sep 2014 22:30:21 GMT

The patch got rid of the "cannot expand" errors and so 9-10 more tests pass. I tested it with boost commit b15ca1, thread commit 556bbde.

milestone changed

viboes — Sun, 07 Sep 2014 07:35:04 GMT

milestone To Be Determined → Boost 1.57.0

Thanks for your quick response. I will close it as soon as this commit is merged to master

https://github.com/boostorg/thread/commit/e93035ce4211375a040cdb61959ecd8d94e3a941

Sun, 07 Sep 2014 13:26:04 GMT

The other error still remains though ("sorry, unimplemented: mangling template_id_expr"). About ten tests fail because of it.

viboes — Tue, 16 Sep 2014 06:09:19 GMT

https://github.com/boostorg/thread/commit/546ca909c4f9c4db847661fba7b6e06bc2b8b097

status changed; resolution set

viboes — Tue, 16 Sep 2014 06:15:59 GMT

status assigned → closed
resolution → fixed