GD 1.8.4+PHP 4.0.6

Compiling PHP 4.0.6 with GD 1.8.4 gave me the following error: make[3]: Entering directory `/root/install/php-4.0.6/ext/gd' gcc -I. -I/root/install/php-4.0.6/ext/gd -I/root/install/php-4.0.6/main -I/root/install/php-4.0.6 -I/root/install/apache_1.3.20/src/include -I/root/install/apache_1.3.20/src/os/unix -I/root/install/php-4.0.6/Zend -I/root/install/gd-1.8.4 -I/root/install/php-4.0.6/ext/mysql/libmysql -I/root/install/php-4.0.6/ext/xml/expat/xmltok -I/root/install/php-4.0.6/ext/xml/expat/xmlparse -I/root/install/php-4.0.6/TSRM -DSUPPORT_UTF8 -DXML_BYTE_ORDER=12 -g -O2 -c gd.c && touch gd.lo gd.c:95: conflicting types for `gdIOCtx' /root/install/gd-1.8.4/gd_io.h:18: previous declaration of `gdIOCtx' gd.c: In function `php_if_imagecreatefromgif': gd.c:1209: `gdImageCreateFromGif' undeclared (first use in this function) gd.c:1209: (Each undeclared identifier is reported only once gd.c:1209: for each function it appears in.) gd.c: In function `php_if_imagegif': gd.c:1404: `gdImageGif' undeclared (first use in this function) make[3]: *** [gd.lo] Error 1 make[3]: Leaving directory `/root/install/php-4.0.6/ext/gd' I looked through the code, but its been years since I've touched C... Any ideas? Thanks, --tom