[gtkada] Compatibility GtkAda 1.x <-> 2.0]

[Arnaud Charlet]

> 1)  --host=i686-windows-mingw32 is mandatory here (gcc 3-2 +
> gnatgcc 3-3 + msys 1.01 + snapshot GtkAda)

Right, a similar note has been added in CVS.

> 2) The most important, the CC redefine trick does not work here...

Well, it does work for us. Some other combination should also work, e.g.
make CC=...

> 3) FYI, when compiling misc.c, I obtain many warnings (-Wall is on in
> the script)...

These warnings can be ignored.

Arno