[Octave-patch-tracker] [patch #8919] Start of patch to enable visibility attributes for GCC in build system

[Rik]

URL:
  <http://savannah.gnu.org/patch/?8919>

                 Summary: Start of patch to enable visibility attributes for
GCC in build system
                 Project: GNU Octave
            Submitted by: rik5
            Submitted on: Fri 26 Feb 2016 09:32:15 AM PST
                Category: None
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

By using visibility attributes a programmer can control which functions are
exported into the symbol table of a shared object.  By reducing the number of
symbols the linker can run faster and the generated shared object is smaller.

For an explanation of the benefits and the approach see:
https://gcc.gnu.org/wiki/Visibility.

Octave already has support mostly in place for this.

Steps:

1) make maintainer-clean
2) Apply visibility.patch from this issue report
3) change CFLAGS and CXXFLAGS to include "-fvisibility=hidden"
4) bootstrap
5) configure
6) make

The build currently fails because liboctinterp is looking for symbols that
have not been exported from liboctave.  This requires finding the necessary
functions and decorating them with OCTAVE_API so they are exported into the
symbol table of liboctave.  This is where things stand today (2/26/2016).




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File Attachments:


-------------------------------------------------------
Date: Fri 26 Feb 2016 09:32:16 AM PST  Name: visibility.patch  Size: 1kB   By:
rik5

<http://savannah.gnu.org/patch/download.php?file_id=36475>

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