Hello Guys,
I am new to Fedora. I am installing GTK on Fedora 9. I have installed Glib, Pango and the dependecies, pkg-config, gettext, gnu make, libpng, font-config, freetype and libiconv.

Now when I install atk-1.25.2 I get error message: Please refer to the error log:
checking for pkg-config... /usr/local/bin/pkg-config
checking pkg-config is at least version 0.16... yes
checking for GLIB - version >= 2.0.0...
*** 'pkg-config --modversion glib-2.0' returned 2.20.1, but GLIB (2.16.3)
*** was found! If pkg-config was correct, then it is best
*** to remove the old version of GLib. You may also be able to fix the error
*** by modifying your LD_LIBRARY_PATH enviroment variable, or by editing
*** /etc/ld.so.conf. Make sure you have run ldconfig if that is
*** required on your system.
*** If pkg-config was wrong, set the environment variable PKG_CONFIG_PATH
*** to point to the correct configuration files
no
configure: error:
*** GLIB 2.0.0 or better is required. The latest version of
*** GLIB is always available from ftp://ftp.gtk.org/. If GLIB is installed
*** but not in the same location as pkg-config add the location of the file
*** glib-2.0.pc to the environment variable PKG_CONFIG_PATH.
[root@localhost atk-1.25.2]#

My Glib version is 2.20 downloaded from gtk.org
I have set the environment variable PKG_CONFIG_PATH to the path where glib-2.0.rc is installed.
I am totally stuck. Kindly help!!!!

Pkgconfig gets the correct glib2 version, but configure finds first your older glib2. You can set the LD_LIBRARY_PATH like this:
Also edit /etc/ld.so.conf and add/put /usr/local/lib before /usr/lib. After editing /etc/ld.so.conf you have to run ldconfig.

Wonderful. Thank you, Bathory this indeed worked. You saved my day