This project (licensed under LGPLv3) provides full documented procedures to build PostgreSQL from sources (and some additional extensions / Foreign Data Wrappers: sqlite_fdw, www_fdw, mysql_fdw, ldap_fdw, couchdb_fdw, oracle_fdw, ...) using MinGW-w64 (recent versions of gcc - 4.8.0 or later). It also provides ready made binaries/releases targetting Win32 as well as Win64 (Windows7).
Note: Installers are also released to make easy the installation of the PostgreSQL extensions mentioned above in PostgreSQL installations made from the official Windows 7 - 32-bit and 64-bit - installers (those extensions releases - DLLs - being fully compatible with the said installers).
