Problem installing PHP with Informix support

Group, I'm attempting to install PHP with support for the Informix database on a Red Hat Linux Advanced Server 3 IA64 machine. I'm trying to create an RPM file, so I've edited the php.spec file to include: --with-informix=/opt/informix and I've put the path to the informix libraries in the environment variable LD_LIBRARY_PATH and I'm running the command 'rpmbuild -ba /path/to/spec/file/php.spec' This is the error I'm seeing. //usr/bin/ld: cannot find -lphpifx collect2: ld returned 1 exit status usr/bin/ld: cannot find -lphpifx collect2: ld returned 1 exit status make: *** [sapi/cgi/php] Error 1 make: *** Waiting for unfinished jobs.... make: *** [sapi/cli/php] Error 1 error: Bad exit status from /var/tmp/rpm-tmp.74613 (%build) RPM build errors: Bad exit status from /var/tmp/rpm-tmp.74613 (%build) I'd appreciate any suggestions. Google comes up empty on this one. Thanks in advance Brad Kittredge