Where is my glib-2.0.pc

Hi everyone,
I am using FC3 and try to install R package,but i got errors like this:

[root@sibs download]# R CMD INSTALL Ruuid_1.8.0.tar.gz
* Installing *source* package 'Ruuid' ...
checking for pkg-config... /usr/bin/pkg-config
checking for glib-config... no
checking for glib-2.0... Package glib-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `glib-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'glib-2.0' found
configure: error: No glib package information found
ERROR: configuration failed for package 'Ruuid'
** Removing '/usr/lib/R/library/Ruuid'

Then i use

[root@sibs download]# whereis pkgconfig
pkgconfig: /usr/lib/pkgconfig /usr/share/pkgconfig