Did you replace ld.exe and ar.exe in the bin folder through the ones from the current MingW you used to build?
You could as well kick out the gui modules again and resync them and do selective module builds through calling bmk in the future (or by using Blide :) )
You could as well kick out the gui modules again and resync them and do selective module builds through calling bmk in the future (or by using Blide :) )