Thanks for the report. This issue was fixed some time ago on the maintenance branch, but we have not been very good at getting maintenance releases out lately. Hopefully one will drop shortly.

Mike

On 07/22/2011 03:57 PM, Andy Somogyi wrote:
Hi All,

Apparently, some time ago, libpng made the png_info structure opaque. OSX has a 
newer version on libpng, so matplotlib would not compile. Attached is the 
_png.cpp that fixes this issue, I changed it to use the new libpng access 
routines.

This issue will certainly come up on any platform with newer libpng versions.



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