Hi,
The vigra library included in hugin-2010.0.0 doesn't compile against
png-1.4.2.
It uses the png_set_gray_1_2_4_to_8() function that was deprecated in
png-1.0.18 (2004) and png-1.2.9 (2006) and removed in png-1.4.0. The
official porting instructions at
http://www.libpng.org/pub/png/src/libpng-1.2.x-to-1.4.x-summary.txt
recommend replacing it with png_set_expand_gray_1_2_4_to_8().
Thanks for the patch, but this issue is already fixed in the mercurial
repository and will be included in the next release.
Thomas
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