. done!
>>> Verifying ebuild Manifests...

>>> Emerging (1 of 1) dev-php5/ZendOptimizer-3.3.0a to /
 * ZendOptimizer-3.3.0a-linux-glibc21-i386.tar.gz RMD160 SHA1 SHA256 size ;-) ...                                                                                                               [ ok ]
 * checking ebuild checksums ;-) ...                                                                                                                                                            [ ok ]
 * checking auxfile checksums ;-) ...                                                                                                                                                           [ ok ]
 * checking miscfile checksums ;-) ...                                                                                                                                                          [ ok ]
 * checking ZendOptimizer-3.3.0a-linux-glibc21-i386.tar.gz ;-) ...                                                                                                                              [ ok ]
 *
 * Using dev-lang/php-5.2.5-r1
 *
>>> Unpacking source...
>>> Unpacking ZendOptimizer-3.3.0a-linux-glibc21-i386.tar.gz to /var/tmp/portage/dev-php5/ZendOptimizer-3.3.0a/work
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/dev-php5/ZendOptimizer-3.3.0a/work/ZendOptimizer-3.3.0a-linux-glibc21-i386 ...
>>> Source compiled.
>>> Test phase [not enabled]: dev-php5/ZendOptimizer-3.3.0a

>>> Install ZendOptimizer-3.3.0a into /var/tmp/portage/dev-php5/ZendOptimizer-3.3.0a/image/ category dev-php5
>>> Completed installing ZendOptimizer-3.3.0a into /var/tmp/portage/dev-php5/ZendOptimizer-3.3.0a/image/

* checking 3 files for package collisions
>>> Merging dev-php5/ZendOptimizer-3.3.0a to /
--- /usr/
--- /usr/lib/
--- /usr/lib/php5/
--- /usr/lib/php5/lib/
--- /usr/lib/php5/lib/php/
--- /usr/lib/php5/lib/php/extensions/
--- /usr/lib/php5/lib/php/extensions/no-debug-non-zts-20060613/
>>> /usr/lib/php5/lib/php/extensions/no-debug-non-zts-20060613/ZendOptimizer.so
--- /usr/share/
--- /usr/share/doc/
--- /usr/share/doc/dev-php5/
>>> /usr/share/doc/dev-php5/ZendOptimizer-3.3.0a/
>>> /usr/share/doc/dev-php5/ZendOptimizer-3.3.0a/README-ZendOptimizer.gz
>>> /usr/share/doc/dev-php5/ZendOptimizer-3.3.0a/Zend_Optimizer_User_Guide.pdf.gz
 *
 * You need to restart apache2 to activate the ZendOptimizer.
 *
>>> dev-php5/ZendOptimizer-3.3.0a merged.
>>> Recording dev-php5/ZendOptimizer in "world" favorites file...

>>> No packages selected for removal by clean
>>> Auto-cleaning packages...

>>> No outdated packages were found on your system.

 * Messages for package dev-php5/ZendOptimizer-3.3.0a:

 *
 * You need to restart apache2 to activate the ZendOptimizer.
 *
 * GNU info directory index is up-to-date.
roon emi # php -v
PHP 5.2.5-pl1-gentoo (cgi-fcgi) (built: Feb  6 2008 11:49:56)
Copyright (c) 1997-2007 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies
roon emi # php -m
[PHP Modules]
bz2
cgi-fcgi
ctype
curl
date
dba
dom
exif
gd
gettext
imap
libxml
mbstring
mcrypt
mcve
mhash
mysql
ncurses
openssl
pcre
posix
session
snmp
sockets
standard
sysvmsg
sysvsem
sysvshm
tokenizer
xml
zlib

[Zend Modules]

roon emi # /etc/init.d/apache2 restart
 * Stopping apache2 ...                                                                                                                                                                         [ ok ]
 * Starting apache2 ...
 ok ]

php -m
[PHP Modules]
bz2
cgi-fcgi
ctype
curl
date
dba
dom
exif
gd
gettext
imap
libxml
mbstring
mcrypt
mcve
mhash
mysql
ncurses
openssl
pcre
posix
session
snmp
sockets
standard
sysvmsg
sysvsem
sysvshm
tokenizer
xml
zlib

[Zend Modules]