Re: [Boost-users] boost iOS8 failure

Subject: Re: [Boost-users] boost iOS8 failure
From: David Medine (dmedine_at_[hidden])
Date: 2015-02-10 19:33:44

Steven,
Thanks for this. I am familiar with the script you mention, although I 
haven't tried that yet. I have been using a pre-compiled for iOS library 
that I found (which I seem to recall uses the script of which you 
speak). I have also tried to build my own boost as part of the project.

The shell script may provide a clue, though. Obviously someone has been 
able to compile boost code for iOS8. If the script can build it, then so 
can I, right?

Thanks again for the feedback -- this has been driving me nuts.
-David

On 2/10/2015 4:26 PM, Steven Clark wrote:
>
> I have been building and using a subset of Boost for an app that runs 
> on iOS 8.x for months.  I build Boost 1.52 with a shell script based 
> on “boost.sh” written by Pete Goodliffe in 2009 that you can find with 
> Google.  I’m building the thread, signals, filesystem, regex, system, 
> and date_time libraries.  It’s an older solution, but it still works 
> fine for me.
>
> If you want more details, please email me directly (sclark_at_[hidden]) 
> so as not to clutter up the list. However, if you’re not adept at bash 
> scripting, then you might be better served by pursuing another solution.
>
> Steven J. Clark
>
> VGo Communications
>
> *From:*Boost-users [mailto:boost-users-bounces_at_[hidden]] *On 
> Behalf Of *David Medine
> *Sent:* Tuesday, February 10, 2015 2:30 PM
> *To:* boost-users_at_[hidden]
> *Subject:* [Boost-users] boost iOS8 failure
>
> First of all, I know that calls for help are not appropriate to the 
> list, so let me disclaim by saying that I am not asking for help, 
> simply reporting an issue.
>
> I am attempting to compile a C++ library (that uses boost) for iOS8 
> distribution. The library compiles fine on OSX (and Linux and Windows) 
> but will not compile for iOS8.  I get dozens of compiler complaints 
> regarding boost headers that all involve some sort of 'Semantic Issue'.
>
> For example, in boost's hash.hpp, I get a 'No matching function for 
> call to 'has_value' error on these lines (439-442):
>
>      BOOST_HASH_SPECIALIZE_REF(std::string)
> #if !defined(BOOST_NO_STD_WSTRING)
>      BOOST_HASH_SPECIALIZE_REF(std::wstring)
> #endif
>   
>
> In this case I was able to skirt the issue by adding code to define 
> the function hash_value for std::string and std::wstring:
>
>     inline std::size_t hash_value(
>         std::string const &v)
>     {
>         return hash_range(v.begin(), v.end());
>     }
>
>     inline std::size_t hash_value(
>         std::wstring const &v)
>     {
>         return hash_range(v.begin(), v.end());
>     }
>
> I am probably going to go through all such failures of clang to 
> interpret the boost code correctly for iOS compilation and modify the 
> source just so I can get this going. This is a major pain because 
> there are dozens of these, many of which are far less straightforward 
> to remedy. Besides I don't necessarily want a custom version of boost 
> that ships with my library.
>
> I have the build settings in my iOS project (I'm using XCode) exactly 
> the same as they are in the OSX project. I don't understand why the 
> compiler behaves differently for these two targets.
>
> Finally, there are two stackoverflow questions that I posted related 
> to this problem.
> http://stackoverflow.com/questions/28422862/clang-different-when-compiling-for-osx-and-ios
> http://stackoverflow.com/questions/28308466/ios8-boost-hash-hpp-system-clock-hpp-etc-fail
>
> THX!
>
>
>
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