make -j broken on Releng_7

[Aryeh M. Friedman]

[LoN]Kamikaze wrote:
> I just upgraded a couple of systems to Releng_7 and everything works just
> fine, except for make -j. With the -j parameter every file is simply deemed
> "up to date" and nothing at all gets built.
>
> Does anyone else experience this? Would it help to rebuild world? After all
> the first time it has been build using gcc3.4 from Releng_6.
>   

Yes or install 4.X from ports