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[trunk] Add documentation for stable API/ABI and gcc flags on UNIX

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Mathieu Malaterre 2012-10-25 08:44:27 +00:00
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README
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@ -32,3 +32,16 @@ see LICENSE for license and copyright information.
see INSTALL for installation procedures. see INSTALL for installation procedures.
see NEWS for user visible changes in successive releases. see NEWS for user visible changes in successive releases.
see CHANGES for per-revision changes. see CHANGES for per-revision changes.
----------------
API/ABI
OpenJPEG strives to provide a stable API/ABI for your applications. As such it
only exposes a limited subset of its functions. It uses a mecanism of
exporting/hiding functions. If you are unsure which functions you can use in
your applications, you should compile OpenJPEG using something similar to gcc:
-fvisibility=hidden compilation flag.
See also: http://gcc.gnu.org/wiki/Visibility
On windows, MSVC directly supports export/hidding function and as such the only
API available is the one supported by OpenJPEG.