Where is my glib-2.0.pc

["Jiantao Shi" <bioconductor cn gmail com>]

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

to find  glib-2.0.pc but failed.So where is glib-2.0.pc file?
Thanks in advance

Jiantao Shi