I'm trying to upgrade my libpng. Now I have old libpng and new version libpng. How do I know if I compile libpng correctly? In the directory I see 2 libpng.

dvong

[root@mrtg src]# gunzip -c libpng-*.tar.gz |tar xf -
You have new mail in /var/spool/mail/root
[root@mrtg src]# rm libpng-*.tar.gz
rm: remove `libpng-1.2.5.tar.gz'? y
[root@mrtg src]# mv libpng-* libpng
mv: cannot overwrite directory `libpng/libpng-1.2.5'
[root@mrtg src]# ls
gd libpng mrtg-2.9.17 wget-log zlib
gd-2.0.15 libpng-1.2.5 mrtg-2.9.17.tar.gz wget-log.1
[root@mrtg src]# mv libpng-1.2.5 libpng
mv: cannot overwrite directory `libpng/libpng-1.2.5'