[Bug target/50694] SH Target: SH2A little endian does not actually work

["oleg dot endo at t-online dot de" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50694

--- Comment #9 from Oleg Endo <oleg.endo@t-online.de> 2011-10-30 12:45:30 UTC ---
(In reply to comment #8)
> (In reply to comment #7)
> 
> This problem doesn't require the theoretical/mathematical
> completeness.  There are many inappropriate combinations
> of options which don't get any warning when running compiler
> and configurations.  The important thing is to warn very
> confusing ones from the user's point of view.  So your patch
> in #6 or even one liner in #2 would be OK and enough for
> this PR, I think.

OK.  I think the SH1 check should be left out completely in this case.
If it is included, the default configuration (-m1 -mb) will fail to build
e.g. newlib.  I'd propose catching the SH2A case only, considering the user's
default -mb / -ml configuration.  If somebody configures the default to be -m2a
-ml then it will fail to build, but I guess only very few people will try to do
that anyway.