This pkg-config thing doesn't work for me

[Tomasz Wegrzanowski <taw users sourceforge net>]

I have stable glib and gtk on my system in /usr.
It's Debian GNU/Linux 2.3 woody i386.

I downloaded glib and gtk+ from cvs.
I compiled and installed glib to /home/taw/local/.
I set ACLOCAL_FLAGS to '-I /home/taw/local/share/aclocal/'.
Now I can't ./configure gtk, as it can only see old glib.

I tried setting PKG_CONFIG_PATH and tried --with-glib=/home/taw/local.
Both failed.

Could you explain me how to use this pkg-config ?