I'm trying to get qmake to produce a makefile which *does not* include `-arch i386` in CFLAGS/LFLAGS and so far I'm not succeeding. I tried the following:

* `CONFIG-=x86`
* `QMAKE_CFLAGS-="-arch i386"`

and a couple of other variations. The only one that *does* work is removing `x86.prf` from `mkspecs/features/mac` but I don't think it's a proper solution.

The current commandline looks approximately like this:

```
qmake -makefile -nocache CONFIG-=release CONFIG+=Debug CONFIG+=mac 
 CONFIG+=CMDMAKE CONFIG-=x86 CONFIG+=x64 
 QMAKE_MAKEFILE=makefile_mac_Debugx64 QMAKE_LFLAGS="<...>"
 QMAKE_CXXFLAGS="<..>" QMAKE_CFLAGS="<...>" QTVER=4.8.4 project.pro

```