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Subject: Re: [boost] Let's stop distributing binaries
From: Robert (r.firl_at_[hidden])
Date: 2018-08-30 21:11:27

On 8/29/2018 6:03 PM, Peter Dimov via Boost wrote:
> Robert Ramey wrote:
>> > This is all irrelevant anyway because we don't ship binaries except
>> on > Windows where we don't have a problem with them.
>> Hmmm - we ship binaries I presume in the form of DLLS and *.lib files.
>> Which -std version are these compiled with?
> The compiler default. MSVC versions before 2015 didn't have -std at all,
> for 2015/2017 the default is C++14.

This is the command from a new Console project in VS 2017, 15.8.1:
/JMC /permissive- /Yu"pch.h" /GS /W3 /Zc:wchar_t /ZI /Gm- /Od /sdl
/Fd"x64\Debug\vc141.pdb" /Zc:inline /fp:precise /D "_DEBUG" /D
"_CONSOLE" /D "_UNICODE" /D "UNICODE" /errorReport:prompt /WX-
/Zc:forScope /RTC1 /Gd /MDd /FC /Fa"x64\Debug\" /EHsc /nologo
/Fo"x64\Debug\" /Fp"x64\Debug\DefaultConsPjBoostTest.pch"

Command from a new Static Library project in VS 2017, 15.8.1:
/JMC /permissive- /Yu"stdafx.h" /GS /W3 /Zc:wchar_t /ZI /Gm- /Od /sdl
/Fd"x64\Debug\StaticLibMSForPjBoost.pdb" /Zc:inline /fp:precise /D
"_DEBUG" /D "_LIB" /D "_UNICODE" /D "UNICODE" /errorReport:prompt /WX-
/Zc:forScope /RTC1 /Gd /MDd /FC /Fa"x64\Debug\" /EHsc /nologo
/Fo"x64\Debug\" /Fp"x64\Debug\StaticLibMSForPjBoost.pch"

The "default" does not set the /std option. Where does the Visual
Studio Team document the default C++ standard used within each Visual
Studio revision?


>> Doesn't that create a number of problems?  Weren't you the one who
>> pointed this out?
> Most MSVC users don't change the default, and for those who use C++17,
> there aren't (yet) any problems because very few libraries (yet) change
> their ABI for C++17. The main dividing line is between 03 and 11, a
> secondary one exists between 11 and 14.
> C++14 is a very good ABI default. >
>> > Linux binaries are shipped by the distros, not us.
>> Hmmm - same question as above?  if the binaries are compiled with one
>> -std version but the user links in via static or dynamic link with a
>> different -std version won't that create problems?
> It very well might, but we can do nothing about it. Most new distros
> ought to use the default C++14, which is the most compatible one.
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