Re: Are clang++ and libc++ compatible?

From: Tijl Coosemans <tijl_at_coosemans.org>
Date: Sat, 16 Nov 2013 18:14:47 +0100
On Sat, 16 Nov 2013 08:54:55 -0800 Steve Kargl wrote:
> On Sat, Nov 16, 2013 at 01:58:11PM +0100, Tijl Coosemans wrote:
>> On Tue, 12 Nov 2013 14:40:42 -0800 Steve Kargl wrote:
>>> On Tue, Nov 12, 2013 at 10:19:46PM +0100, Tijl Coosemans wrote:
>>>> On Tue, 12 Nov 2013 12:19:22 -0800 Steve Kargl wrote:
>>>>> 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.
>>> 
>>> Unfortuantely, that's not it. Just rebuilt fftw3 and octave still
>>> dies.  ldd shows that /usr/local/lib/octave/3.6.4/liboctinterp.so.1
>>> is bringing in both libc++ and libstdc++, but it is also linked
>>> to 52 other libraries.
>> 
>> USE_FORTRAN=yes currently implies USE_GCC=yes so the C++ code in
>> math/octave links with libstdc++ while dependencies link with libc++.
>> Gerald, is it possible to separate USE_FORTRAN from USE_GCC?
> 
> This isn't the problem.  gfortran does not pull libstdc++.so into
> the build.  As pointed out in another email, libGL, libGLU, fltk,
> and libgraphite2 all were linked to libc++ and libstdc++.  Recompiling
> those ports with USE_GCC=any, fixed octave.

The math/octave Makefile has USE_FORTRAN=yes (FC=gfortran46).  This
currently implies USE_GCC=yes (CC=gcc46, CXX=g++46) which pulls in
libstdc++.  If this could be changed (i.e. FC=gfortran46, CC=cc,
CXX=c++) you would not have to add USE_GCC to the dependencies.
Received on Sat Nov 16 2013 - 16:14:58 UTC

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