Zabbix-proxy 5 on Centos6 with postgresql

[falco_null]

Hello,

I am installing Zabbix-proxy 5.0.2 on a Centos6 and Postgresql-9.4 with the following configuration,

# ./configure --enable-proxy --with-postgresql=/usr/pgsql-9.4/bin/pg_config --prefix=/usr/local/zabbix-5.0.2 --with-libcurl --with-libxml2 --with-ssh2

I launch the "make install" and it flips me this error when it's over,

../../src/libs/zbxdb/libzbxdb.a(libzbxdb_a-db.o): In function `zbx_db_connect':
/root/zabbix-5.0.2/src/libs/zbxdb/db.c:748: undefined reference to `PQconnectdbParams'
/root/zabbix-5.0.2/src/libs/zbxdb/db.c:748: undefined reference to `PQconnectdbParams'
collect2: ld devolvió el estado de salida 1
make[3]: *** [zabbix_proxy] Error 1
make[3]: se sale del directorio `/root/zabbix-5.0.2/src/zabbix_proxy'
make[2]: *** [all-recursive] Error 1
make[2]: se sale del directorio `/root/zabbix-5.0.2/src/zabbix_proxy'
make[1]: *** [all-recursive] Error 1
make[1]: se sale del directorio `/root/zabbix-5.0.2/src'
make: *** [all-recursive] Error 1

Could someone tell me how to compile it?

Thank you