Re: [Boost-bugs] [Boost C++ Libraries] #6998: visibility problems on Mac OS X / GCC

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #6998: visibility problems on Mac OS X / GCC
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-06-19 12:40:19

#6998: visibility problems on Mac OS X / GCC
-------------------------------+--------------------------------------------
  Reporter:  mgaunard          |       Owner:  vladimir_prus     
      Type:  Bugs              |      Status:  new               
 Milestone:  To Be Determined  |   Component:  program_options   
   Version:  Boost 1.49.0      |    Severity:  Problem           
Resolution:                    |    Keywords:  visibility gcc mac
-------------------------------+--------------------------------------------
Description changed by mgaunard:

Old description:

> When an application built with -fvisibility=hidden is linked against
> libboost_program_options.dylib (built with default visibility), the
> linker emits the following warning:
>
> {{{
> ld: warning: direct access in
> __static_initialization_and_destruction_0(int, int) to global weak symbol
> boost::program_options::options_description::~options_description() means
> the weak symbol cannot be overridden at runtime. This was likely caused
> by different translation units being compiled with different visibility
> settings.
> }}}
>
> Even if the two are built with different visibility settings the
> program_options headers should force whatever needs to be visible to be.

New description:

 When an application built with -fvisibility=hidden is linked against
 libboost_program_options.dylib (built with default visibility), the linker
 emits the following warning:

     ld: warning: direct access in
 !__static_initialization_and_destruction_0(int, int) to global weak symbol
 boost::program_options::options_description::~options_description() means
 the weak symbol cannot be overridden at runtime. This was likely caused by
 different translation units being compiled with different visibility
 settings.

 Even if the two are built with different visibility settings the
 program_options headers should force whatever needs to be visible to be.

--
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Ticket URL: <https://svn.boost.org/trac/boost/ticket/6998#comment:1>
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