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https://issues.apache.org/jira/browse/QPID-3163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13072475#comment-13072475
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Alan Conway commented on QPID-3163:
-----------------------------------
Work to date is on branch
https://svn.apache.org/repos/asf/qpid/branches/qpid-3163.
The bulk of the extern declarations etc. are in place, however I'm stuck on a
run time failure. The boost::any code, used by boost::program_options, used by
qpid/Options, does a typeinfo comparison which fails due to multiple typeinfo
symbols for std::string. (See http://gcc.gnu.org/wiki/Visibility).
One (impractical) solution that I have verified is to wrap every #include
<string> like this
#pragma GCC visibility push(default)
#include <string>
#pragma GCC visibility pop
This includes occurences in system header files! Clearly not practical.
Another solution would be to re-write qpid::Options to avoid boost::options.
There are further issues to resolve after getting past this one, not clear how
many although I think we're nearly there.
> Define public/private library symbols with gcc
> ----------------------------------------------
>
> Key: QPID-3163
> URL: https://issues.apache.org/jira/browse/QPID-3163
> Project: Qpid
> Issue Type: Improvement
> Components: C++ Client
> Affects Versions: 0.11
> Reporter: Alan Conway
> Assignee: Alan Conway
> Fix For: 0.11
>
>
> Currently qpid libraries built with gcc export all symbols, public and
> private. This makes it difficult to define the public interface of our
> libraries and to create automated tools that can verify compatibility
> between library versions or detect incompatible changes.
> gcc provides a flag flag to make symbols hidden by default
> (--fvisibility=hidden), and the qpid source code already has macros to mark
> public functions, the FOO_EXTERN macros defined to support exporting the
> public API on Windows. By suitably defining these macros for gcc we can
> control the symbols exported by our libraries.
> For more details:
> http://gcc.gnu.org/wiki/Visibility
> http://gcc.gnu.org/faq.html#dso
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