gentoo pecl-memcache problem

memcache-2.2.6 # make
/bin/sh /home/vova/memcache-2.2.6/libtool --mode=compile cc -I/usr/lib64/php5.2/include/php -I. -I/home/vova/memcache-2.2.6 -DPHP_ATOM_INC -I/home/vova/memcache-2.2.6/include -I/home/vova/memcache-2.2.6/main -I/home/vova/memcache-2.2.6 -I/usr/lib64/php5.2/include/php -I/usr/lib64/php5.2/include/php/main -I/usr/lib64/php5.2/include/php/TSRM -I/usr/lib64/php5.2/include/php/Zend -I/usr/lib64/php5.2/include/php/ext -I/usr/lib64/php5.2/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /home/vova/memcache-2.2.6/memcache.c -o memcache.lo
/home/vova/memcache-2.2.6/libtool: line 481: CDPATH: command not found
libtool: Version mismatch error. This is libtool 2.4, but the
libtool: definition of this LT_INIT comes from an older release.
libtool: You should recreate aclocal.m4 with macros from libtool 2.4
libtool: and run autoconf again.
make: *** [memcache.lo] Error 63



If you have error with libtool version after make - way to install:
phpize --clean && phpize
rm aclocal.m4
aclocal
autoconf
./configure
make
make install
[memcache-2.2.6, gentoo.x86-64]