libpng12.so.0 missing problem in Archlinux

Archlinux has been offering libpng14 recently, however if some self-compiled packages are used in the system, it may turn out an disaster :(

I had cario, freetype2 & libxft compiled from abs so as to enable sort of cleartype effect in type rendering, however, after I updated libpng recently from version 12 to 14, I cannot boot into gdm correctly. I cannot even run vim in a console for it complains that libpng12.so.0 cannot be found.

So I have to:

1. boot with run level 3 (adding 3 at the end of grub's kernel line);
2. login as root and remove self-compiled packages that require libpng12, cario, freetype2 & libxft in my case (I found -d option useful since I will soon reinstall these packages);
3. recompile new versions with libpng14;
4. install those packages.