[Bug other/67304] Allow front-ends to share command-line options with different behaviours

["manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67304

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

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                 CC|                            |manu at gcc dot gnu.org

--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Iain Buclaw from comment #0)
> However I am not too familiar with the awk files used in the process, so I'm
> not sure how much of an undertaking this will be.

>From my own experience, being familiar with awk is not really needed. You just
need to figure out what C++ code you want to generate (options.c, options.h)
and how it will interact with the rest of GCC. I will suggest that you actually
prototype your changes directly hacking options.c and options.h, then you
modify the awk scripts to generate that code. Modifying the scripts is not that
complex, just printing the right things at the right place (probably our awk
scripts can be very much cleaned up and optimized but it hasn't been an issue
so far).
>From gcc-bugs-return-495348-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Aug 21 13:12:20 2015
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Subject: [Bug tree-optimization/67306] Patterns ICEs when moved using "simplify and match"
Date: Fri, 21 Aug 2015 13:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idg306

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2015-08-21
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ah, indeed.  Mine.