PHP 4.0.1 -> GD compile error

Hi ! During php-4.0.1 compling I get this error message : gcc -DHAVE_CONFIG_H -I. -I/usr/src/php-4.0.1/ext/gd -I/usr/src/php-4.0.1 -I/usr/src/php-4.0.1/main -I/usr/src/apache_1.3.12/src/include -I/usr/src/apache_1.3.12/src/os/unix -I/usr/src/php-4.0.1/Zend -I/usr/src/php-4.0.1 -I/usr/local/include -I/usr/local/mysql/include/mysql -I/usr/src/php-4.0.1/ext/xml/expat/xmltok -I/usr/src/php-4.0.1/ext/xml/expat/xmlparse -DXML_BYTE_ORDER=12 -g -O2 -c gd.c && touch gd.lo gd.c: In function `php_if_imagecreatefromgif': gd.c:472: `gdImageCreateFromGif' undeclared (first use this function) gd.c:472: (Each undeclared identifier is reported only once gd.c:472: for each function it appears in.) gd.c: In function `php_if_imagegif': gd.c:629: `gdImageGif' undeclared (first use this function) make[3]: *** [gd.lo] Error 1 make[3]: Leaving directory `/usr/src/php-4.0.1/ext/gd' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/usr/src/php-4.0.1/ext/gd' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/usr/src/php-4.0.1/ext' make: *** [all-recursive] Error 1 I have tried : gd-1.4, gd-1.7.3 and gd-1.8.3 I'm using a Slackware Linux 2.0.38. Vennligst hilsen / Regards \\|// (O-O) -----------------------------------------------------oOO--(_)--OOo------ Roar Pettersen Phone: (47) 55304600 Technical Support Fax: (47) 55304601 Heath Comm A/S, Norway E-mail: roar@heathcomm.no ------------------------------------------------------------------------