Undefined references in php_mcal.c

Hello everybody!, I'm getting the following error while trying to build PHP (with MCAL support) as static module of Apache: /usr/src/apache_1.3.12# ./configure --prefix=/usr/local/apache/ --activate-module=src/modules/php4/libphp4.a --activate-module=src/modules/standard/mod_speling.o --activate-module=src/modules/standard/mod_info.o; make ... -I/usr/src/php4/TSRM -I/usr/src/php4 -DUSE_EXPAT -I./lib/expat-lite -DNO_DL_NEEDED -DAPACHE_SSL ./apaci \ -o httpsd buildmark.o modules.o modules/dav/libdav.a modules/standard/libstandard.a modules/ssl/libssl.a modules/php4/libphp4.a main/libmain.a ./os/unix/libos.a ap/libap.a lib/expat-lite/libexpat.a -L/usr/src/expat -lexpat -Wl,-rpath,/usr/src/imap-4.7c/lib -Wl,-rpath,/usr/local/lib -Wl,-rpath,/usr/src/libmcal -Wl,-rpath,/usr/local/mysql/lib/mysql -rdynamic -rdynamic -L/usr/src/imap-4.7c/lib -L/usr/local/lib -L/usr/src/libmcal -L/usr/local/mysql/lib/mysql -Lmodules/php4 -L../modules/php4 -L../../modules/php4 -lmodphp4 -lc-client -ldl -lz -lz -ljpeg -lpng -ltiff -lpdf -lmysqlclient -lmcal -lldap -llber -lresolv -lm -ldl -lcrypt -lnsl -lresolv -lm -lcrypt -L/usr/src/openssl-0.9.5a -lssl -lcrypto modules/php4/libphp4.a(php_mcal.o): In function `cal_close_it': /usr/src/php4/ext/mcal/php_mcal.c:129: undefined reference to `cal_close' modules/php4/libphp4.a(php_mcal.o): In function `php_mcal_do_open': /usr/src/php4/ext/mcal/php_mcal.c:229: undefined reference to `cal_open' /usr/src/php4/ext/mcal/php_mcal.c:240: undefined reference to `calevent_new' modules/php4/libphp4.a(php_mcal.o): In function `php_mcal_event_init': /usr/src/php4/ext/mcal/php_mcal.c:248: undefined reference to `calevent_free' /usr/src/php4/ext/mcal/php_mcal.c:249: undefined reference to `calevent_new' modules/php4/libphp4.a(php_mcal.o): In function `php_if_mcal_fetch_event': /usr/src/php4/ext/mcal/php_mcal.c:461: undefined reference to `cal_fetch' /usr/src/php4/ext/mcal/php_mcal.c:465: undefined reference to `calevent_free' modules/php4/libphp4.a(php_mcal.o): In function `php_if_mcal_list_events': /usr/src/php4/ext/mcal/php_mcal.c:532: undefined reference to `dt_setdate' /usr/src/php4/ext/mcal/php_mcal.c:533: undefined reference to `dt_setdate' /usr/src/php4/ext/mcal/php_mcal.c:541: undefined reference to `cal_search_range' modules/php4/libphp4.a(php_mcal.o): In function `php_if_mcal_list_alarms': /usr/src/php4/ext/mcal/php_mcal.c:650: undefined reference to `dt_setdate' /usr/src/php4/ext/mcal/php_mcal.c:651: undefined reference to `dt_settime' /usr/src/php4/ext/mcal/php_mcal.c:657: undefined reference to `cal_search_alarm' modules/php4/libphp4.a(php_mcal.o): In function `php_if_mcal_delete_event': /usr/src/php4/ext/mcal/php_mcal.c:725: undefined reference to `cal_remove' modules/php4/libphp4.a(php_mcal.o): In function `php_if_mcal_append_event': /usr/src/php4/ext/mcal/php_mcal.c:759: undefined reference to `cal_append' /usr/src/php4/ext/mcal/php_mcal.c:760: undefined reference to `calevent_free' ... Using: Apache-1.3.12 apache_1.3.12+ssl_1.41 PHP4 CVS CVS version of libmcal, mstore and icap Has anyone experienced the same or am I missing something?. Thank you for your attention. Raul