Re: [boost] [lockfree] arm / iOS builds against Boost.Atomic

Subject: Re: [boost] [lockfree] arm / iOS builds against Boost.Atomic
From: Tim Blechmann (tim_at_[hidden])
Date: 2013-05-16 21:46:13

> I would be happy to help if I can. We at least need libc++ (_LIBCPP_VERSION
> should be defined if so), atomics have been around there since 3.1,
> although I'm not sure the best way to ensure they are available on the
> given system.  One way to go is:
> 
> #if defined( BOOST_CLANG )
> #if __has_include( <atomic> )
> // we're good
> #endif
> #enfif
> 
> although in my own code I just rely on if _LIBCPP_VERSION is there since I
> am using apple's toolchains.

hmm, maybe checks for both would be needed. e.g. some compilers have
<atomic>, but don't implement it completely ... quite a mess ... so i'm
rather conservative about using std::atomic (clang/libstdc++ might cause
some problems) ... but enabling std::atomic via _LIBCPP_VERSION is
probably safe ...

cheers,
tim