after start intsall OpenERP 7.0 server by command "sudo python setup.py install" i recive below error

....
Processing psutil-0.6.1.tar.gz
Running psutil-0.6.1/setup.py -q bdist_egg --dist-dir /tmp/easy_install-Sqk_Rx/p        sutil-0.6.1/egg-dist-tmp-WQHmHr
unable to execute gcc: No such file or directory
error: Setup script exited with error: command 'gcc' failed with exit status 1
...

server OS:

lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 6.0.6 (squeeze)
Release:        6.0.6
Codename:       squeeze