Date: Tue, 12 Nov 2013 22:19:46 +0100 From: Tijl Coosemans <tijl@coosemans.org> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: David Chisnall <theraven@FreeBSD.org>, freebsd-current@FreeBSD.org, Dimitry Andric <dim@FreeBSD.org> Subject: Re: Are clang++ and libc++ compatible? Message-ID: <20131112221946.78602db0@kalimero.tijl.coosemans.org> In-Reply-To: <20131112201922.GA4330@troutmask.apl.washington.edu> References: <20131112163219.GA2834@troutmask.apl.washington.edu> <77CB2B92-216A-4C80-B033-7E582B5F0DFC@FreeBSD.org> <20131112165422.GA2939@troutmask.apl.washington.edu> <E0FE40D9-726C-4501-B31A-3622510C1C68@FreeBSD.org> <20131112175556.GA3319@troutmask.apl.washington.edu> <20131112201922.GA4330@troutmask.apl.washington.edu>
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On Tue, 12 Nov 2013 12:19:22 -0800 Steve Kargl wrote:
> On Tue, Nov 12, 2013 at 09:55:56AM -0800, Steve Kargl wrote:
>> On Tue, Nov 12, 2013 at 06:37:39PM +0100, Dimitry Andric wrote:
>>> On 12 Nov 2013, at 17:54, Steve Kargl <sgk@troutmask.apl.washington.edu> wrote:
>>>>
>>>> struct Entry {
>>>> time_t date;
>>>> Severity severity;
>>>> std::deque<Entry> messages;
>>>> std::string message;
>>>> bool is_child;
>>>> Entry() : is_child(false) { }
>>>> };
>>>
>>> I think the problem is that the code tries to use std::deque<Entry> as a
>>> member of struct Entry, before it is completely defined. This is not
>>> allowed by the standard, although some libraries (e.g. GNU libstdc++)
>>> apparently permit it for some container types.
>>>
>>> You could try to work around it with -fdelayed-template-parsing, but I
>>> am not sure if it will help. Alternatively, compile the code with
>>> libstdc++, or rewrite it to conform. :-)
>>
>> Thanks for the suggestions. -fdelayed-template-parsing did not
>> help. (Un)fortunately, I know very little about C++, so rewriting
>> the code is not option for me. I guess I'll add a USE_GCC to the
>> port's Makefile to if it will build.
>
> Sigh. Adding USE_GCC isn't the solution.
There's a similar problem with graphics/blender. There's a class
TreeElement which links to its parent TreeElement like this:
std::map<std::string, TreeElement>::const_iterator parent;
Works with libstdc++, fails with libc++. If the standard doesn't
specify this it would still be a very convenient extension.
> % pan
> Segmentation fault (core dumped)
> % ldd /usr/local/bin/pan | grep ++
> libstdc++.so.6 => /usr/local/lib/gcc46/libstdc++.so.6 (0x3c52bf000)
> libc++.so.1 => /usr/lib/libc++.so.1 (0x3c81ea000)
>
> This can't be good. And, unfortunately, testing math/octave shows
> no better :(
>
> % octave
> Segmentation fault (core dumped)
> % ldd /usr/local/bin/octave-3.6.4 | grep ++
> libstdc++.so.6 => /usr/local/lib/gcc46/libstdc++.so.6 (0x3c92ec000)
> libc++.so.1 => /usr/lib/libc++.so.1 (0x3c9801000)
This could be because you enabled the OPENMP option in math/fftw3.
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