Is imageMagick using libpng 1.6.x version?

[henry]

I am trying to build imageMagick 6.9.2-4 on ubuntu14.04,
however, I found ligpng12 appears when I run "ldd convert", does it mean imageMagick is linked with libpng12?

THanks
Henry

[glennrp]

You might be using both libpng12 and libpng16. Freetype pulls in libpng12 even when ImageMagick itself is built with libpng16.