Re: [RFC] GDB Hurd Fixes

[David Michael <fedora.dm0@gmail.com>]

Hi,

On Fri, Sep 20, 2013 at 4:47 AM, Pedro Alves <palves@redhat.com> wrote:
> On 09/20/2013 01:43 AM, David Michael wrote:
>> (Copying gdb-patches this time.)
> But, we're missing all the context on the gdb-patches@ side.

Sorry about that--here's an explanation of the problems in GDB's build
process with current Hurd:

First, mig has stopped using the "auto" keyword in its output.[1]
Without that keyword, gdb/reply_mig_hack.awk fails to match a
necessary pattern and outputs a bad gdb/process_reply_S.c file.  The
first change I made adds a new pattern to the script in addition to
the old one, so it should work with both old and new mig binaries.

Next, new function definitions were added (then renamed) in
<hurd/process_reply.defs>.[2]  In the generated
gdb/process_reply_S.raw, some of the new functions match patterns in
gdb/reply_mig_hack.awk in a different order than expected, producing
bad output again.  The second change I made to the script ensures a
necessary definition is found before writing output.  (It may be
preferable to add a "parse_phase = 6" instead.)

Also because of [2], linking fails due to missing some new functions
in gdb/process_reply_S.c.  I just extended the way other unused
functions from process_reply.defs were handled previously in
gdb/gnu-nat.c.

Thanks.

David

[1] http://git.savannah.gnu.org/cgit/hurd/mig.git/commit/?id=b53836447df7230cd5665a7ccabd2a6e1a6607e5
[2] http://git.savannah.gnu.org/cgit/hurd/hurd.git/commit/?id=e19cc6184fb99394845d56e6e915fea9805e5c28