check in /usr/share/lib/silc/ for a directory called pkgconfig, if this is the install root this is where the files will be. If they are there ( /usr/share/lib/silc/pkgconfig), then do the following:
Code:
export PKG_CONFIG_PATH=/usr/share/lib/silc/pkgconfig:$PKG_CONFIG_PATH
what this does is set another path for pkg-config to look in for .pc files. you would be better off though installing silc and silc-client in a more standard place
like /usr/local or /opt or wherever you like to install to.