Compilation Help?

[Shonumi]

Do you have 1.2 on your system as well? From what I understand, you can have multiple versions of a library "installed" but the system only symlinks to one at a time (libpng.so or something should be a symlink). I'm not at my desktop (going to bed, typing on my iPod :p) but if you ls /usr/lib64/libpng* you'll see what you've got and I think you can use ln -s to show what file a symlink points to. Odds are Ubuntu points the symlink to 1.2 (which is the default in the repos, so it probably is on your system). You just need to change the symlink to point to 1.5.x