[Octave-bug-tracker] [bug #34301] Can't compile oct files using gcc -fvisibility=hidden option

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?34301>

                 Summary: Can't compile oct files using gcc
-fvisibility=hidden option
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Thu 15 Sep 2011 21:19:46 UTC
                Category: Configuration and Build System
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Feature Request
                  Status: None
             Assigned to: None
         Originator Name: Andrew Ross
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.2.4
        Operating System: GNU/Linux

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Details:


The OCTAVE_EXPORT macro defined in oct-dlldefs.h is empty on gcc. Defining it
for gcc using 

#define OCTAVE_EXPORT __attribute__ ((visibility ("default")))

will allow oct code to be compiled using the gcc -fvisibility=hidden option,
which by default does not export any symbols. See
http://gcc.gnu.org/wiki/Visibility for a brief overview of why this is a good
idea.

This bug report originates from work on the octave bindings for plplot using
swig. The relevant thread showing the discussion and our temporary workaround
is
http://www.mail-archive.com/address@hidden/msg04950.html

Regards

Andrew




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