problems upgrading libexif

[Takanori Yamamoto]

Hi,

> "port -dvufn upgrade libexif" fails when trying to build one of  
> libexif's dependencies, graphvz, with the following error:

I don't know why graphviz fails to build, but I committed a new patch to avoid this issue. (r22688)
port:doxygen has been removed from the dependency list now, so I think you will be able to install libexif without any problems.
Please try it again later. Thanks.