From: "Jernej Simončič"

>> No idea what it really means.  Other than what it actually says.

>Do a export CFLAGS="$CFLAGS -mms-bitfields" before configuring and 
>compiling
>any GTK+ program on Windows - the libraries are always built to be
>compatible with MSVC so that you can use 1 set of libraries for all
>programs.

I'll have to wait until Jim sends me the changes.

I'm not a developer and I have no idea what you mean by "export".

I'm just serving as a dumb build enviornment.

Although the mingw/msys devel environment might work under Linux & WINE, he 
wouldn't have any way to run & test the resulting executables.