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Date: Tue, 12 Jan 2016 13:48:19 -0800 (PST)
From: Don Lewis <truckman@FreeBSD.org>
Subject: Re: svn commit: r405907 - head/Mk
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On 12 Jan, Stephen Montgomery-Smith wrote:
> Author: stephen
> Date: Tue Jan 12 19:56:13 2016
> New Revision: 405907
> URL: https://svnweb.freebsd.org/changeset/ports/405907
> 
> Log:
>   - Svn revision 405533 upgraded /math/octave to version 4.0.0.  This version
>     of octave segfaults with FreeBSD.  Many of the octave-forge-* ports don't
>     build, and those that build don't work.  So they are all being marked
>     broken until it is fixed.

It's actually octave-gui that is segfaulting.  The cause is that the
executable is bringing in both libstdc++ and libc++, and the reason for
that is likely the addition of USE_GCC=yes to the port Makefile that was
done at the same time as the version upgrade.

I have no idea what happens if USE_GCC=yes is removed from the Makefile.
there may be problems with compiling the source with the combination of
clang and gfortran.  I'll give it a try, though.

Another possibility would be do disable the gui.  Looking at configure,
there is a --disable-gui option that we don't expose as a port option. I
don't know what libraries are needed by the gui, but of all the
libraries in LIB_DEPENDS, libfltk.so, libftgl.so, and libqscintilla2.so
are the ones that are linked to libc++.so.

Unfortunately, "octave --no-gui" doesn't work.  It still tries to run
octave-gui and dies.