Você precisa instalar o pacote libX11:
$ rpm -qf /usr/lib/libX11.so.6
libX11-1.3.1-3.fc13.i686
Apenas vá
$ yum -y install libX11
Mais uma coisa: se você não sabe como encontrar e instalar um pacote de biblioteca, é importante compartilhar porque você está tentando compilar um pacote de software oficialmente empacotado para o Fedora 13 na versão mais recente? / p>
$ yum info gpicview
Available Packages
Name : gpicview
Arch : x86_64
Version : 0.2.1
Release : 3.fc13
Size : 93 k
Repo : fedora
Summary : Simple and fast Image Viewer for X
URL : http://lxde.sourceforge.net/gpicview/
License : GPLv2+
Description : Gpicview is an simple and image viewer with a simple and intuitive interface.
: It's extremely lightweight and fast with low memory usage. This makes it
: very suitable as default image viewer of desktop system. Although it is
: developed as the primary image viewer of LXDE, the Lightweight X11 Desktop
: Environment, it only requires GTK+ and can be used in any desktop environment.