error: command 'gcc' failed with exit status when installing psycopg2

[root@server01 ~]# easy_install psycopg2    Searching for psycopg2    Reading http://pypi.python.org/simple/psycopg2/    Reading http://initd.org/psycopg/    Reading http://initd.org/projects/psycopg2    Best match: psycopg2 2.4.5    Downloading http://initd.org/psycopg/tarballs/PSYCOPG-2-4/psycopg2-2.4.5.tar.gz    Processing psycopg2-2.4.5.tar.gz    Running psycopg2-2.4.5/setup.py -q bdist_egg --dist-dir /tmp/easy_install-anWVvJ/psycopg2-2.4.5/egg-dist-tmp-cZbdtnno previously-included directories found matching 'doc/src/_build' In file included from psycopg/psycopgmodule.c:27:./psycopg/psycopg.h:31:22: error: libpq-fe.h: No such file or directory In file included from psycopg/psycopgmodule.c:29:...error: Setup script exited with error: command 'gcc' failed with exit status 1

ok

For the case of CentOS, I had this very same problem, that I solved installing these packages:

sudo yum install postgresql-libssudo yum install postgresql-develsudo yum install python-devel

only then, I was able to perform successfully:

sudo easy_install psycopg2