I plan on posting this stuff to the wiki once it's figured out, hopefully it's okay that I'm using the mail list to figure this stuff out.
the really strange thing is this:
[6:15pm tingham /sw/include]|% ls libpng* libpng: libpng png.h pngconf.h
libpng12: libpng png.h pngconf.h
//-----------------------------------------//
[6:17pm tingham /sw/lib]|% ls libpng* libpng.2.1.0.12.dylib libpng.3.1.2.5.dylib libpng.a libpng12.0.1.2.5.dylib libpng12.a libpng.2.dylib libpng.3.dylib libpng.dylib libpng12.0.dylib libpng12.dylib
//----------------------------------------//
[6:17pm tingham /sw/bin]|% ls libpng* libpng-config libpng12-config
//-----------------------------------------//
[6:18pm tingham /sw/share/man]|% ls -lR ./* | grep png -rw-r--r-- 1 root wheel 433 6 Nov 22:26 pngtopnm.1 -rw-r--r-- 1 root wheel 433 6 Nov 22:26 pnmtopng.1 -rw-r--r-- 1 root admin 160934 2 Nov 11:31 libpng.3 -rw-r--r-- 1 root admin 17107 2 Nov 11:31 libpngpf.3 -rw-r--r-- 1 root admin 1858 2 Nov 11:31 png.5
So I'm guessing it's just a matter of telling the configure script where to find libpng.. as there is some stuff installed in /usr/local ( but I have no idea how it got there )
-Thomas