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teem doesn't build against png-1.4.2. The attached patch fixes the problem according to the official instructions from http://www.libpng.org/pub/png/src/libpng-1.2.x-to-1.4.x-summary.txt. Please include it.
Patch fixing the problem for png-1.5 as well.
png-1.5 introduced more changes; the attached patch deals with them.
No reaction to my previous bug reports makes me wonder about the biological state of the project...
At least as revision 5073 Teem compiles and links with libpng version 1.5.4 without warning or error, and it seems these patches have been applied, or the underlying changes have been made by other means.