PostgreSQL drivers build and use

[Thuthuka]

I am trying to get a Qt connection to PostgreSQL. I have made a few changes to get things to work
So I'll give the details so you know where I am and how I got there.

Current Sys config:
Windows 8 64-bit
postgresql-9.2.4
Qt 5.0.2 mingw 32- bit

First I build the ..\5.0.2\Src\qtbase\src\plugins\sqldrivers\psql\psql.pro
to point the psql.pro to my PostgreSQL I added the following to my psql.pro

@
INCLUDEPATH += $$quote("C:/pgsql/include/")
@

But when I did that I got
.. \mingw\i686-w64-mingw32\include\sys\timeb.h:90: error: previous definition of 'struct timespec'

Which is a conflict between the two following defines. One from Qt and another from PostgreSQL

timeb.h
@
#ifndef _TIMESPEC_DEFINED
#define _TIMESPEC_DEFINED
struct timespec {
time_t tv_sec; /* Seconds /
long tv_nsec; / Nanoseconds */
};
@

pgsql\include\pthread.h
@
#ifndef HAVE_STRUCT_TIMESPEC
#define HAVE_STRUCT_TIMESPEC 1
struct timespec {
long tv_sec;
long tv_nsec;
};
#endif /* HAVE_STRUCT_TIMESPEC */
@

To fix this I added this to my psql.pro
@
DEFINES += HAVE_STRUCT_TIMESPEC
@

This build but for some strange reason put the files in a new folder C:\plugins\sqldrivers
libqsqlpsql.a
libqsqlpsqld.a
qsqlpsql.dll
qsqlpsqld.dll

I copied them to here
..\5.0.2\mingw47_32\plugins\sqldrivers\

When I try and use this in QT now I am getting the following.
The code

@ qDebug() << "Available drivers: " << QSqlDatabase::drivers();
*db = QSqlDatabase::addDatabase("QPSQL");
qDebug() << "addDatabase() " << (db->isValid() ? "VALID" : "ERROR");
db->setUserName("postgres");
db->setPassword("postgres");
db->setDatabaseName(DBName);
db->open();
@

gives me the following errors:

@Available drivers: ("QSQLITE", "QODBC", "QODBC3", "QPSQL", "QPSQL7")
QSqlDatabase: QPSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QODBC QODBC3 QPSQL QPSQL7
addDatabase() ERROR
Available drivers: ("QSQLITE", "QODBC", "QODBC3", "QPSQL", "QPSQL7")
can't find linker symbol for virtual table for QSqlDriver' value foundQSqlDatabasePrivate::shared_null()::dr' instead
can't find linker symbol for virtual table for QSqlDriver' value foundQSqlDatabasePrivate::shared_null()::dr' instead
can't find linker symbol for virtual table for QSqlDriver' value foundQSqlDatabasePrivate::shared_null()::dr' instead
can't find linker symbol for virtual table for QSqlDriver' value foundQSqlDatabasePrivate::shared_null()::dr' instead
can't find linker symbol for virtual table for QSqlDriver' value foundQSqlDatabasePrivate::shared_null()::dr' instead
can't find linker symbol for virtual table for QObjectData' value foundQSqlDatabasePrivate::shared_null()::dr' instead
can't find linker symbol for virtual table for QObjectData' value foundQSqlDatabasePrivate::shared_null()::dr' instead
can't find linker symbol for virtual table for QObjectPrivate' value foundQSqlDatabasePrivate::shared_null()::dr' instead
QSqlDatabase: QPSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QODBC QODBC3 QPSQL QPSQL7
Debugging has finished
@

Have I build the PostgreSQL drivers incorrectly?

Do I need to do something other than place the drivers into the \plugins\sqldrivers\ dir?

edit
I have just tried putting QTPLUGIN += qsqlpsql into my test.pro file but it does not seem to have any affect.