Re: [boost] VC10 config - some regressions in several libraries

Subject: Re: [boost] VC10 config - some regressions in several libraries
From: Stephan T. Lavavej (stl_at_[hidden])
Date: 2010-04-26 18:55:18

I've made a note to myself to request that /Za be removed or at least deprecated in VC11 (our command-line deprecation warnings aren't silenceable, so they're pretty effective). I was already planning to request that /Wp64 be removed in VC11, since it was deprecated in VC9 and VC10. I don't always get what I want, but the cases for their removal are straightforward.

Thanks,
STL

-----Original Message-----
From: boost-bounces_at_[hidden] [mailto:boost-bounces_at_[hidden]] On Behalf Of Eric Niebler
Sent: Monday, April 26, 2010 2:36 PM
To: boost_at_[hidden]
Subject: Re: [boost] VC10 config - some regressions in several libraries

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On 4/26/2010 2:22 PM, Ion Gaztañaga wrote:
> On 26/04/2010 21:08, Stephan T. Lavavej wrote:
>> Correct. This wasn't intentional, but /Za ("disable language
>> extensions") has an extremely nasty bug in VC10. It performs
>> elided-copy-constructor-accessibility checks when it shouldn't
>> (specifically, when rvalue references are being bound, in which case
>> no copy constructors are being called, even theoretically).
> 
> Thanks for the confirmation. Best,

/Za has been broken and useless for as long as I can remember, and
Microsoft doesn't seem interested in either fixing or deprecating it.
(See, for example,
https://connect.microsoft.com/VisualStudio/feedback/details/486253/name-lookup-broken-with-za,
not to mention the fact that Microsoft's own system headers won't
compile with /Za.) No sane person should use it for anything.

Steven, feel free to pass along this message: please fix it or drop it.

Thanks,

- -- 
Eric Niebler
BoostPro Computing
http://www.boostpro.com
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