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From "Alan Conway (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (QPID-3163) Define public/private library symbols with gcc
Date Mon, 19 Sep 2011 14:01:10 GMT

     [ https://issues.apache.org/jira/browse/QPID-3163?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Alan Conway updated QPID-3163:

    Priority: Minor  (was: Major)

> 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
>            Priority: Minor
>             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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