[cfe-dev] [llvm-dev] Upcoming removal of std::auto_ptr (in C++1z)

[Martin J. O'Riordan via cfe-dev]

Thanks Eric, the assurance that there will never be a need for a MultiLib build is more comforting than you might guess :), and to me, it is further weight against the incumbent.

 

So from that, I would like to expand - with an out-of-tree - CMake “incompatible” library cross-compiler, what flags should I pass while building LibC++?  Usually I follow whatever ‘buildit’ recommends, but ‘buildit’ looks likely to be removed soon.

 

Thanks,

 

            MartinO

 

 

From: Eric Fiselier [mailto:eric at efcs.ca] 
Sent: 30 January 2017 17:20
To: Martin J. O'Riordan <martin.oriordan at movidius.com>
Cc: Marshall Clow <mclow.lists at gmail.com>; cfe-dev <cfe-dev at lists.llvm.org>
Subject: Re: [cfe-dev] [llvm-dev] Upcoming removal of std::auto_ptr (in C++1z)

 

 

 

On Wed, Jan 25, 2017 at 2:11 AM, Martin J. O'Riordan via cfe-dev <cfe-dev at lists.llvm.org <mailto:cfe-dev at lists.llvm.org> > wrote:

Will LibC++ still enable ‘auto_ptr’ when ‘-std=c++[98|11|15]’ are chosen?  I assume that it will.  If ‘auto_ptr’ is entirely in the headers, I don’t see any problems, but if some support is in the library, how should the library itself be built so that a single library build supports all of the Standards?  Will we need to provide Multilib builds of the libraries for C++17 versus its predecessors?

 

 

There will never be a need for multilib builds of Libc++ for different dialects.

 

/Eric

 

 

 

Thanks,

 

            MartinO

 

From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org <mailto:llvm-dev-bounces at lists.llvm.org> ] On Behalf Of Marshall Clow via llvm-dev
Sent: 24 January 2017 22:34
To: llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org> 
Subject: Re: [llvm-dev] Upcoming removal of std::auto_ptr (in C++1z)

 

 

 

On Mon, Jan 23, 2017 at 1:32 PM, Marshall Clow <mclow.lists at gmail.com <mailto:mclow.lists at gmail.com> > wrote:

The upcoming C++1z (probably C++17) standard will not contain several things - most notably auto_ptr.

 

Soon, libc++ will not be providing auto_ptr by default when building in C++1z mode.

You'll be able to get it back with a 

"-D_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR" on your command line, or "#define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR" before including any libc++ header files.

 

 

Landed as revision 292986.

 

-- Marshall 

 


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