That thread isn't relevent. The questioner asks about glib and the answer talks about glibc. These are two totally different things so the answer is wrong.
In your situation, what you need to do is tell pango to use the version of glib you just installed. If you just installed glib-2.4 with
then it will be in /usr/local and you can point to it with some variables
Then try again with pango. No, you don't need to buy another computer, unless you want to.