DennisOSRM/Project-OSRM — comment on commit 94bd6e22ffe761b6aed640cc5dd53a94daa8d8a3
File:  line 0
By emiltin:

i'm always glad to get rid og imagemagick.

but unfortunately, pngwriter doesn't compile on os x, and doesn't seem to be in very active development? https://github.com/mxcl/homebrew/issues/8465