On Tue, Jan 11, 2011 at 09:28:36PM -0800, Alan Irwin wrote: > > This commit finishes what I planned to do for Octave, and I am glad to > say that Andrew has already started making some improvements (i.e., > handling NULL arguments) to my work. > > Here are some known remaining Octave issues which I am leaving to > Andrew when his time constraints permit some work on these issues. > > 2. Get gcc -fvisibility=hidden option to work.
Well I'd entirely forgotten about this until I tried using it with the Debian packages. A short rummage around in the header files shows that swig defines the function plplot_octave in plplot_octaveOCTAVE_wrap.cxx using the macro DEFUN_DLD, which when you follow it through includes the octave export macro OCTAVE_EXPORT. Unfortunately this only supports the requirements of Windows DLLs and not the gcc visibility, at least in octave-3.2. 1) It would be trivial to patch the octave header /usr/include/octave/oct-dlldefs.h similarly to what we do in pldll.h, but this is an octave bug. 2) Alternatively swig could work around this by prepending SWIG_EXPORT (which is defined correctly) before DEFUN_DLD, but only for the gcc case. This is a bit of a temporary hack. 3) A further alternative is that we modify the swig generated source code to do 2) ourselves. For now, for Debian, I've just disabled -fvisibility=hidden for C++ compilers which does the trick, but loses some of the benefits. Andrew ------------------------------------------------------------------------------ Special Offer -- Download ArcSight Logger for FREE! Finally, a world-class log management solution at an even better price-free! And you'll get a free "Love Thy Logs" t-shirt when you download Logger. Secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsisghtdev2dev _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
