[PATCH] gas: Fix -mrelax-relocations detection on Solaris/x86 [PR19520]

[Rainer Orth]

Hi H.J.,

>> For the case at hand, I don't mind since I'd prefer to remove
>> -mrelax-relocations for good since it was only ever created for the
>> benefit of Solaris 12/11.4, but has been unused/disabled for at least 7
>> years.
>
> Remove --enable-x86-relax-relocations is OK.  But -mrelax-relocations=[no|yes]
> should stay since it is used in binutils tests.    I don't see any
> issues for cross binutils.

fine with me.  While the tests could be ripped out as I wrote, keeping
them has the undeniable advantage that the -mrelax-relocations=no case
is tested on all x86 ELF targets, apart from creating far less work for
me.

On top of that, GCC trunk will soon require binutils 2.30+ on Solaris.
This way, one can unconditionally use -mrelax-relocations=yes with gas
since Solaris 11.4 is the only OS version supported there.  This way the
gotx relocs are also tested natively.

Thanks.
	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University