As usual while waiting for the next release - don't forget to check the nightly builds in the forum.
mingw32-g++.exe -O3 -Wall -I..\..\..\src -c ..\..\..\src\pch.h -o src\pch.h.gch
mingw32-g++.exe -O3 -Wall -I..\..\..\src -c ..\..\..\src\pch.h -o ..\..\..\src\pch.h.gch