Re: [Boost-bugs] [Boost C++ Libraries] #7473: clang defines __GNUC__ and confuses the libstdcpp3.hpp configuration header

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7473: clang defines __GNUC__ and confuses the libstdcpp3.hpp configuration header
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-02-19 13:23:50

#7473: clang defines __GNUC__ and confuses the libstdcpp3.hpp configuration header
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  Reporter:  philipp.moeller@…                    |       Owner:  johnmaddock
      Type:  Bugs                                 |      Status:  closed     
 Milestone:  To Be Determined                     |   Component:  config     
   Version:  Boost 1.51.0                         |    Severity:  Problem    
Resolution:  wontfix                              |    Keywords:             
--------------------------------------------------+-------------------------
Changes (by johnmaddock):

  * status:  new => closed
  * resolution:  => wontfix

Comment:

 >What is needed here is to use {{{__GLIBCXX__}}} to detect the version of
 libstdc++.

 That's what we used to do originally.  However, it caused a whole bunch of
 problems and we were specifically advised against doing that by the
 libstdc++ developers.  The issue is that {{{__GLIBCXX__}}} can have a
 higher value for say gcc-4.4.x than for gcc-4.5.0 but fewer features.  I
 believe the bug here is in clang (or in the way you're using it).  As far
 as I can see the only reliable way to support non-standard configurations
 like this is to use the supplied configure script to generate a custom
 configuration:
 http://www.boost.org/doc/libs/1_53_0/libs/config/doc/html/index.html#boost_config.configuring_boost_for_your_platform.using_the_configure_script

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7473#comment:5>
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