mkdir: Failed to make directory "/usr/local/include"; File exists
mkdir: Failed to make directory "/usr/local/lib"; File exists
make: [install] Error 2 (ignored)
cp png.h pngconf.h /usr/local/include
chmod 644 /usr/local/include/png.h /usr/local/include/pngconf.h
cp libpng.a libpng.so.2.1.0.6 /usr/local/lib
chmod 755 /usr/local/lib/libpng.so.2.1.0.6
(cd /usr/local/lib; ln -f -s libpng.so.2.1.0.6 libpng.so.2; \
 ln -f -s libpng.so.2 libpng.so)