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: 2012-10-29 09:18:17

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

 Replying to [comment:2 michel]:
 > Clang can work with more recent versions of libstdc++ than gcc-4.2's
 libstdc++
 > (though sometimes [[http://clang.llvm.org/cxx_status.html|patches]] are
 needed).
 > With those stdlib, we can use C++11 features.
 >
 > What is needed here is to use `__GLIBCXX__` to detect the version of
 libstdc++.

 It seems the mistake is to use the gcc version to detect the version of
 the library to begin with. However, I cannot find a good reference for the
 macros that good be used to detect the libstdc++ version besides
 [http://gcc.gnu.org/onlinedocs/libstdc++/manual/using_macros.html this
 page]. `__GLIBCXX__` doesn't seem particularly helpful unless someone is
 willing to figure out what those values can be and create a table from
 them.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7473#comment:4>
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