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List:       boost
Subject:    Re: [boost] Showstopper for Boost 1.56?
From:       Edward Diener <eldiener () tropicsoft ! com>
Date:       2014-08-01 0:03:59
Message-ID: lrelhg$s7f$1 () ger ! gmane ! org
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On 7/31/2014 7:17 PM, Gavin Lambert wrote:
> On 1/08/2014 10:08, Niall Douglas wrote:
>> Ok, so solutions to stopping tens of megabytes of compiler warnings
>> spew for a build of Boost 1.56 on clang are as follows:
>>
>> 1. Boost Build adds -Wno-c99-extensions and -Wno-variadic-macros to
>> all clang builds.
>>
>> 2. All those libraries using -pedantic with Preprocessor (at least
>> Chrono, Thread and Test) wrap their use of Preprocessor with #pragmas
>> disabling the warnings.
>>
>> 3. All those libraries using -pedantic with Preprocessor (at least
>> Chrono, Thread and Test) add  -Wno-c99-extensions and
>> -Wno-variadic-macros to all clang builds.
>
> 4. Those libraries currently using -pedantic stop doing so, at least for
> clang builds.

In clang-linux.jam and clang-darwin.jam, the '-pedantic' option is 
passed when <warnings>all is specified and not passed when <warnings>on 
is specified. So what appears to be needed is either just changing the 
line which specifies <warnings>all to be the same as <warnings>on in the 
clang jam files, or keeping the clang jam file as is and changing the 
particular libraries putting out the excessive messages to either 
specify <warnings>on rather than <warnings>all for clang builds or add 
the options specified in 3) above.

The problem with changing the jam files is that end-users will also get 
the change where <warnings>all does not specify '-pedantic' where they 
might really want it to.

>
> (I don't know whether this is better or worse than any of the others,
> just that it's an option that wasn't listed.)



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