Making libcxx compile with gcc 4.6.4

[Marshall Clow]

On Nov 21, 2013, at 7:34 AM, Yaron Keren <yaron.keren at gmail.com> wrote:

> Compiling libcxx with gcc 4.6.4 (MingW) produces these errors:
> 
> type_traits:3280:31: error: expected primary-expression before 'decltype'
> type_traits:3280:29: error: expected ';' at end of member declaration
> 
> memory:2415:49: error: function 'std::__1::default_delete<_Tp>::default_delete()' defaulted on its first declaration must not have an exception-specification
> memory:2435:49: error: function 'std::__1::default_delete<_Tp []>::default_delete()' defaulted on its first declaration must not have an exception-specification
> 
> the attached patch defines _LIBCPP_HAS_NO_ADVANCED_SFINAE and _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS for gcc version < 4.7, making the library compile with gcc 4.6.4.
> 
> Yaron

I have no problems with the contents of this patch, but I think it’s time to ask a different question:

What compilers are we willing to support for libc++?
Do we care about gcc 4.6? 4.5? 4.4? 4.3? 4.2? 4.1?
Is anyone testing with these compilers?

— Marshall

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