For FPC3.x.x to work correctly we need to patch koldef.inc in the following manner:
{$DEFINE PAS_VERSION}
{$IFDEF VER2}
{$DEFINE _D3orHigher}
{$DEFINE _D4orHigher}
{$DEFINE _D5orHigher}
{$DEFINE _D6orHigher}
{$DEFINE _D7}
{$DEFINE _D7orHigher}
{$ENDIF}
{$IFDEF VER3}
// I should clean this up later.
{$DEFINE VER2}
{$DEFINE _D3orHigher}
{$DEFINE _D4orHigher}
{$DEFINE _D5orHigher}
{$DEFINE _D6orHigher}
{$DEFINE _D7}
{$DEFINE _D7orHigher}
{$DEFINE _D2005orHigher}
{$DEFINE _D2006orHigher}
{$DEFINE _D2007orHigher}
{$ENDIF}

i scary, needs to change much more (in code), not defines only ^_^

Nope. Works as advertised ;) Just for 64 bit I needed to change a bit more, but my 64bit KOL is out of sync.