RFR (S): 8181787: Remove Solaris SPARC GCC code

[Erik Österlund]

Hi Kim,

Thank you for the review.

Webrev with copyright year updated: 
http://cr.openjdk.java.net/~eosterlund/8181787/webrev.01/

Thanks,
/Erik

On 2017-06-08 20:40, Kim Barrett wrote:
>> On Jun 8, 2017, at 11:06 AM, Erik Österlund <erik.osterlund at oracle.com> wrote:
>>
>> Hi,
>>
>> The only supported way of building OpenJDK on Solaris is via the studio compiler. However, there are unsupported code paths that are enabled only if _GNU_SOURCE is defined. This might be problematic for multiple reasons. Checking for _GNU_SOURCE does not check for GCC, it checks whether the standard library is the GNU standard library. Most importantly, the code has been bit rotting and e.g. the inline assembly for atomic seems to have flaws. Since we never test the correctness of these code paths, I propose to remove this unsupported code.
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8181787
>>
>> Webrev: http://cr.openjdk.java.net/~eosterlund/8181787/webrev.00/
>>
>> Testing: JPRT
>>
>> Will need a sponsor.
>>
>> Thanks,
>> /Erik
> The change to os::readdir in os_solaris.inline.hpp is a bit outside
> the remit for this bug.  But it looks fine.
>
> Looks good.  Remember to update copyrights.
>
> I can sponsor.
>