[boost] [iostreams] gcc visibility support patch

Subject: [boost] [iostreams] gcc visibility support patch
From: Jürgen Hunold (juergen.hunold_at_[hidden])
Date: 2011-07-22 11:22:13

Hi,

I've found some patches for https://svn.boost.org/trac/boost/ticket/2114

This one enables visibility support for Boost.IOStreams

For more information, please see http://gcc.gnu.org/wiki/Visibility

Tested locally for too long.

Okay to commit?

Yours,

Jürgen
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