[fortran,patch] Handle preprocessing with -g3

[Tobias Burnus]

:REVIEWMAIL:

FX Coudert wrote:
> OK for mainline.

OK.


Though, for

+int
+gfc_define_undef_line (void)
+{

you could use bool instead of int.


Thanks for the patch - and for making me aware of this nice dwarf3/gdb
feature.

Tobias