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eaf7abfdc3
This adds pngcp to the build together with a pngcp.dfa configuration test; the test revealed some configuration bugs which are fixed by corrections to the _SUPPORTED macros. pngcp builds on all tested configurations and a number of bugs have been fixed to make this happen relative to the version in libpng 1.7 contrib/examples. pngcp.dfa will have to be different for 1.7 but pngcp.c should work fine (not yet tested). pngcp itself is still missing a usage message; this is a preliminary version, although since it behaves the same way as 'cp' most unoids shouldn't have a problem using it correctly. Signed-off-by: John Bowler <jbowler@acm.org>
This "contrib" directory contains contributions which are not necessarily under the libpng license, although all are open source. They are not part of libpng proper and are not used for building the library, although some are used for testing the library via "make check".