I just want to know if I can update my fedora 12 just like fedora 15. It seems it is difficult to achieve this.
a Upgrade to 15 skipping 13,14 - not going to work well
the default hdd format changed from ext2 or ext3 to ext4
gnome changed MAJOR versions
15 uses a different bootloader ,... and so on.
do a fresh new install after reformatting
as to versions of *.so's ?? unknown
but seeing as the version of gcc went from 4.1 to 4.5
there will be a lot of code rewriting to comply with gcc4.5
so you might as well tackle the *.so issue with it.