Problem compiling IMAP-SSL support into PHP4

Hi! I'm trying to compile PHP4 --with-imap-ssl support; configure and its options run without error messages. $ ./configure --with-apxs --with-gd --with-gettext \ --with-imap --with-imap-ssl --with-openssl --enable-bcmath \ --enable-track-vars --disable-debug $ make ... /raul/src/cvs/php4/TSRM -DLINUX=22 -DTARGET="httpsd" -DUSE_HSREGEX -DUSE_EXPAT -DAPACHE_SSL -DSUPPORT_UTF8 -DXML_BYTE_ORDER=12 -g -O2 -c php_imap.c php_imap.c: In function `php_minit_imap': php_imap.c:450: `auth_ssl' undeclared (first use in this function) php_imap.c:450: (Each undeclared identifier is reported only once php_imap.c:450: for each function it appears in.) make[3]: *** [php_imap.lo] Error 1 make[3]: Leaving directory `/home/raul/src/cvs/php4/ext/imap' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/home/raul/src/cvs/php4/ext/imap' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/raul/src/cvs/php4/ext' make: *** [all-recursive] Error 1 - PHP4 cvs version - OpenSSL 0.9.6 - IMAP-2001.BETA I appreciate your help. Thanks. Raul