I just tried to compile package bbtools-2005.12.1-2 with a non standard version
of the GNU C compiler. It said

1.

wminterface.cc:71: warning: array subscript out of range

The source code is

	e.xclient.data.l[4] = e.xclient.data.l[5] = 0;

but in the X11 header files, the array l has only five elements,

        union {
                char b[20];
                short s[10];
                long l[5];
                } data;
} XClientMessageEvent;

so e.xclient.data.l[5] does not exist.  Suggest code rework.

2.

wminterface.cc:74: warning: array subscript out of range
wminterface.cc:87: warning: array subscript out of range

Duplicates.

I tried emailing the author [ j.m.b.m.kennis@ele.tue.nl ] but I got no
answer.