Mapserver Install: undefined symbol: php_gd_gdImageCopy

[Ryan Ollerenshaw]

  After compiling MapServer i am getting the following error when i make 
a call to the php_mapscript.so:*

Warning*: dl() [function.dl <http://povmars/function.dl>]: Unable to 
load dynamic library '/usr/lib/php/modules/php_mapscript.so' - 
/usr/lib/php/modules/php_mapscript.so: undefined symbol: 
php_gd_gdImageCopy in */var/www/html/phpinfo_mapscript.phtml* on line *21
*
I am using the following configure on fedora core 5:

./configure --with-proj  --enable-runpath 
--with-geos=/usr/bin/geos-config --with-ogr=/usr/local/bin/gdal-config 
--with-gdal=/usr/local/bin/gdal-config 
--with-postgis=/usr/bin/pg_config  --with-php=/usr/bin/php  --with-wcs 
--with-wfs --with-wmsclient --with-wfsclient --with-threads

does anyone know what this php_gd_gdImageCopy symbol is?