Aaron,

> The problem seems to be with the B3DAccelerator plugin, including this plugin either as internal or external produces an
> build error.
> Is this a bug, known bug, or am I still doing something wrong ?

  It seems to be working for me.  What your gcc says when you type

  gcc -v

?  The result includes the path to the 'spec' file.  Does that contain
"-D__MINGW32__"?

-- Yoshiki