[Boost-bugs] [Boost C++ Libraries] #4053: signals2 build failure with "error: dereferencing pointer '<anonymous>' does break strict-aliasing..."

Subject: [Boost-bugs] [Boost C++ Libraries] #4053: signals2 build failure with "error: dereferencing pointer '<anonymous>' does break strict-aliasing..."
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-03-30 07:33:06

#4053: signals2 build failure with "error: dereferencing pointer '<anonymous>'
does break strict-aliasing..."
-----------------------------------------+----------------------------------
 Reporter:  Joe Steeve <js@…>            |       Owner:  fmhess  
     Type:  Bugs                         |      Status:  new     
Milestone:  Boost 1.43.0                 |   Component:  signals2
  Version:  Boost 1.42.0                 |    Severity:  Problem 
 Keywords:                               |  
-----------------------------------------+----------------------------------
 An application using signals2 (attached sample code), fails to build on
 g++ (version 4.4.2-9, Debian squeeze) with the -O2 flag. It builds fine
 under -O0. The build fails with:


 {{{
 joe_at_lark:~/sandbox/test$ g++ -o boost-sig boost-sig.cxx -I/opt/hdb/include
 -Wall -Werror -O2
 cc1plus: warnings being treated as errors
 /opt/hdb/include/boost/optional/optional.hpp: In function ‘int main()’:
 /opt/hdb/include/boost/optional/optional.hpp:315: error: dereferencing
 pointer ‘<anonymous>’ does break strict-aliasing rules
 /opt/hdb/include/boost/optional/optional.hpp:422: note: initialized from
 here
 /opt/hdb/include/boost/optional/optional.hpp:262: error: dereferencing
 pointer ‘<anonymous>’ does break strict-aliasing rules
 /opt/hdb/include/boost/optional/optional.hpp:262: note: initialized from
 here
 /opt/hdb/include/boost/optional/optional.hpp:268: error: dereferencing
 pointer ‘<anonymous>’ does break strict-aliasing rules
 /opt/hdb/include/boost/optional/optional.hpp:268: note: initialized from
 here

 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4053>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.