This is a possible bug/feature request. Is it intentional that the 'Other' tab in the 'Settings->Compiler and debugger->Global Compiler Settings' is not compiler specific?
To be clear I wanted to set the number of process for parallel builds to 2 for gcc and for VC 7.1/8.0 to only 1 because the multi processes doesn't seem to work with the pch settings. (I know that pch is only truly supported by gcc that is why I am backing the number of processes back to 1)