Re: [Boost-bugs] [Boost C++ Libraries] #8265: quadmath.h not found on clang

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #8265: quadmath.h not found on clang
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-03-09 10:21:27

#8265: quadmath.h not found on clang
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  Reporter:  nathanridge              |       Owner:  johnmaddock
      Type:  Bugs                     |      Status:  reopened   
 Milestone:  To Be Determined         |   Component:  math       
   Version:  Boost Development Trunk  |    Severity:  Problem    
Resolution:                           |    Keywords:             
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Comment (by nathanridge):

 Regarding <type_traits>, I did a bit of digging and discovered the
 following:

 - <type_traits> can only be used in C++11 mode (obviously)
 - There are two flags that get clang to operate in C++11 mode: -std=c++11
 and -std=gnu++11. If the -std=c++11 flag is used, the symbol
 {{{__STRICT_ANSI__}}} gets defined. If the -std=gnu++11 flag is used, that
 symbol does not get defined.
 - The use of {{{__float128}}} in <type_traits> is guarded by
 {{{!defined(__STRICT_ANSI__)}}}
 - I usually compile my code with the -std=c++11 flag. In this
 configuration, <type_traits> compiles just fine. If I change the flag to
 -std=gnu++11, I get the same error about {{{__float128}}} in <type_traits>
 that I get with Boost.Math.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8265#comment:5>
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