Re: [boost] Problem with BOOST_NO_CXX11_VARIADIC_TEMPLATES in gcc.hpp

Subject: Re: [boost] Problem with BOOST_NO_CXX11_VARIADIC_TEMPLATES in gcc.hpp
From: John Maddock (boost.regex_at_[hidden])
Date: 2014-08-25 14:03:36

>> I don't think that variadic templates should be disabled for gcc prior
>> to 4.7,
>> even with this problem, since the implementation is sufficient for
>> many use
>> cases.
> I'm not a Boost developer, but it makes sense that this belongs with
> other workarounds.  The GCC C++11 support table claims that 4.4 supports
> variadic templates.  GCC treated the problem as a bug, whose report
> claims it is fixed in 4.7.0.  That seems appropriate for a workaround.
> Since at least 2 libraries already need this workaround, I think it's
> reasonable to replace the library-specific macros with a general
> workaround macro.

OK, I've added a new config macro - 
BOOST_NO_CXX11_FIXED_LENGTH_VARIADIC_TEMPLATE_EXPANSION_PACKS - to 
develop.  Test case failed for Intel-win as well as GCC, so apparently 
it's not just a GCC issue after all.

> Whatever the final decision, I would eventually like to know how to
> patch my copy of 1.56.0, including your fix for gcc.hpp.

Grab the changed files from Github?

John.