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https://issues.apache.org/jira/browse/PROTON-250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15177431#comment-15177431
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ASF subversion and git services commented on PROTON-250:
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Commit 4d90acd6eeb254155aff07caf1aaef00f6338b5a in qpid-proton's branch
refs/heads/master from [~astitcher]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-proton.git;h=4d90acd ]
PROTON-250: [C++ binding] Hide all exported library internal only symbols
> Add -fvisibility option when building shared libraries
> -------------------------------------------------------
>
> Key: PROTON-250
> URL: https://issues.apache.org/jira/browse/PROTON-250
> Project: Qpid Proton
> Issue Type: Improvement
> Components: proton-c
> Affects Versions: 0.3
> Environment: GNU Compiler
> Reporter: Irina Boverman
> Assignee: Andrew Stitcher
> Priority: Minor
> Labels: patch
> Fix For: 0.13.0
>
> Attachments: proton.patch
>
>
> Add an option to "hide" symbols in shared libraries except when they are
> declared public.
> Extends efforts already in place for Windows builds.
> Excludes an effort to determine what symbols should be considered "public"
> interfaces.
> The gcc 4 -fvisibility option is said to:
> ...very substantially improve linking and load times of shared object
> libraries, produce more optimized code, provide near-perfect API export and
> prevent symbol clashes. It is strongly recommended that you use this in any
> shared objects you distribute.
> See here: http://gcc.gnu.org/wiki/Visibility
> Attached patch (patch.txt) will build libqpid-proton.so shared library using
> this flag.
> It reduces number of symbols from 700+ to 500+.
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