RFC: GDB as a loader 2/3: return child result

[Andrew STUBBS]

Hi all,

The attached patch implements a new option --return-child-result. This
option causes GDB to return the return value of the last child
(inferior) program to run. The patch assumes that the batch-silent patch
has already been applied.

Note that 'quit <expr>' still works as expected. Also, any exit through
a mechanism other than quit_force (i.e. errors) gives the same exit code
as it did before. Batch mode has been adjusted to exit through
quit_force in order to ensure it give the right result.

I am not sure that this has been implemented in the best way. The
declaration of extern variables probably ought to be moved to a header
file somewhere, but I'm not sure which is best. It has also been
suggested that it ought to use the value stored in the existing
$_exitcode convenience variable.

Thanks

Andrew Stubbs



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