stale fixincludes fixes

[Bruce Korb]

On Thu, Sep 10, 2009 at 12:49 PM, Ralf Wildenhues
<Ralf.Wildenhues@gmx.de> wrote:
>> I think we can just remove sco_math.  SCO support was deprecated in 4.3
>> and removed in 4.4, but finding all fixes affected by a particular
>> deprecation is tricky since they don't all state the affected target
>> triplets in a form matched by grep.
>
> That calls for a cleanup sweep of inclhack.def.  OK for this followup
> patch?  This time tested on i686-pc-linux-gnu only, so I'm driving blind
> as to whether any of the removed hacks could have fixed a system that is
> still supported.

One of the things that could easily be done is to fiddle the code a bit
to record which fixes fire and ask the person building GCC to let some
obscure email address know that a particular fix fired on a particular
platform, perhaps marking some "obviously in use" fixes with a "don't
bother" flag.  If some fix hasn't been reported in after several years,
it might be a reasonable candidate for removal.  Or, mark the fixes we
think may be obsolete and emit a message to the GCC builder, "Your
build required the XXX fix and we're considering obsoleting that fix.
Please notify xxx@whatever.xxx that you still need this fix."