[cairo-bugs] [Bug 24834] configure.ac blocks updates of libpng

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=24834





--- Comment #2 from John Bowler <jbowler at acm.org>  2009-11-01 03:33:53 PST ---
(In reply to comment #1)
> http://cgit.freedesktop.org/cairo/commit/?id=d544828934e479071fe5246fc0bdbbad33c097e8

I tested it (the commit diff) and it worked.  I applied it to configure, not
configure.ac, as gentoo loads a distribution package (the source with
autogen.sh already run).  The result did, indeed, find libpng14

Anyway by visual examination it will be equivalent to my version.

You can repro anywhere by installing libpng-1.4.0beta88 (or, probably, any
1.4.0 beta) and *removing* any older libpng libraries.  If you don't remove the
libraries (the normal situation) the problem is undetectable because configure
finds the old library but then the build uses the new, 1.4, png.h header (and
the new library.)


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