Re: [Libjpeg-devel-6x] Support for renaming public API in supportof dual 8bit/12bit configurations

[Guido V. <gu...@el...>]

Bob Friesenhahn wrote:
> 
> Perhaps Guido can be convinced to include 12-bit symbol naming in the
> new library as well?

v7 supports versioned symbols.
Look in configure.ac and Makefile.am, by default it is enabled when available.

There is a file libjpeg.map in the distribution.
It has the content:

LIBJPEG_7.0 {
  global:
    *;
};

That way you can build different versions which can coexist without ABI
compatibility issues.
So if you choose another name than LIBJPEG_7.0 in that file, you can use
a different configuration in coexistence with the default version.

The default version will have only 8-bit support as usual.  12-bit is
not important enough for mainstream application, and there will be more
important features to implement preferential for v8 release next year. 

> I understand that Guido Vollbeding is planning to release a libjpeg at 
> release level 7 by the end of the month.

Yes, that's true.  If no unexpected events happen, I will update www.ijg.org
on 27-Jun-2009 with the IJG JPEG 7 release from the current (17-Jun-2009)
pre-release: http://jpegclub.org/jpegsrc.v7pre.tar.gz

Regards
Guido