libungif.so.4: cannot open shared object file: No such file or directory

/home/swftools/bin/pdf2swf: error while loading shared libraries: libungif.so.4: cannot open shared object file: No such file or directory

rpm -qfi libungif.so.4

Name        : giflib                       Relocations: (not relocatable)

Version     : 4.1.3                             Vendor: CentOS

Release     : 7.3.3.el5                     Build Date: Thu 05 May 2011 12:18:07 AM KST

Install Date: Tue 22 Nov 2011 12:20:16 AM KST      Build Host: builder10.centos.org

Group       : System Environment/Libraries   Source RPM: giflib-4.1.3-7.3.3.el5.src.rpm

Size        : 80900                            License: MIT

Signature   : DSA/SHA1, Thu 05 May 2011 02:08:43 AM KST, Key ID a8a447dce8562897

URL         : //www.sf.net/projects/libungif/

Summary     : Library for manipulating GIF format image files

Description :

The giflib package contains a shared library of functions for

loading and saving GIF format image files.  It is API and ABI compatible

with libungif, the library which supported uncompressed GIFs while the

Unisys LZW patent was in effect.

Install the giflib package if you need to write programs that use GIF files.

You should also install the giflib-utils package if you need some simple

yum -y install giflib