Created attachment 4227 add link against lm Hey, since libpng dropped -lm from pkg-config, it's needed in exo. Attached patch does that.
This had already been fixed in master. I cherry-picked the commit into the xfce-4.8 branch. BTW, the author of the fix in master was you. ;) commit fa0261d20dc5500bd5fcb45ffa4ea6fb83dc3f2f Author: Yves-Alexis Perez <corsac@debian.org> Date: Thu Sep 8 10:26:33 2011 +0200 Add missing -lm. Libpng removed -lm so we need to include this ourselfs.