php-cvs can not make

Hi all: I got errors while run "make" command at php-cvs source directory: OS Linux RedHat 6.0 Kernel 2.2.5.15 cd /tmp/php4 ./buildconf ./configure --with-zlib --with-mm --with-mcal=../libmcal --with-ldap \ --with-imap=../imap-2001.BETA.SNAP-0107112053 \ --with-gettext --enable-ftp --with-db3=/usr/local/BerkeleyDB.3.2 \ --with-informix=/home/informix --with-apache=../apache_1.3.20 \ --with-mysql=/usr/local --with-config-file-path=/usr/local/apache/conf \ --enable-track-vars ./make make[3]: Entering directory `/tmp/php4/ext/standard' gcc -I. -I/tmp/php4/ext/standard -I/tmp/php4/main -I/tmp/php4 -I/tmp/apache_1.3.20/src/include -I/tmp/apache_1.3.20/src/os/unix -I/tmp/php4/Zend -I/usr/local/BerkeleyDB.3.2/include -I/usr/local/include -I/tmp/imap-2001.BETA.SNAP-0107112053/ c-client -I/home/informix/incl/esql -I/tmp/libmcal -I/usr/local/include/mysql -I /tmp/php4/ext/xml/expat -I/tmp/php4/TSRM -g -O2 -c html.c && touch html.lo html.c: In function `determine_charset': html.c:232: `CODESET' undeclared (first use in this function) html.c:232: (Each undeclared identifier is reported only once html.c:232: for each function it appears in.) make[3]: *** [html.lo] Error 1 make[3]: Leaving directory `/tmp/php4/ext/standard' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/tmp/php4/ext/standard' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/tmp/php4/ext' make: *** [all-recursive] Error 1