After configuring with graphics but no 3D, fwindow.r compile fails as follows:
fwindow.r:1396:21: error: ‘struct _wstate’ has no member named ‘is_gl’
if (!w->window->is_gl && j == MAXXOBJS) {
^
The first half of the boolean test should be under an ifdef Graphics3D, one way or another.
Diff: