[aarch64-port-dev ] [RFR] 8151841: Build needs additional flags to compile with GCC 6 [plus parts of 8149647 & 8032045]

[Andrew Hughes]

Hi all,

The aarch64/jdk8u tree, as it currently stands, won't build on GCC >= 6.
A fix for this was pushed upstream over a year as 8151841:

https://bugs.openjdk.java.net/browse/JDK-8151841

but has not yet appeared in any 8u releases, due to the delay of 8u122
this January. It's expected to appear as part of 8u152 in October, and
so we would pull it into aarch64/jdk8u after that.

As more and more people are now moving to distros with either GCC 6
(and now 7), I suggest we cherry-pick this change and apply it to
aarch64/jdk8u prematurely, so developers on newer versions of GCC
can build. As a case in point, I've had to apply and then remove this
fix myself to test merges of aarch64/jdk8u.

The changeset applies as-is to aarch64/jdk8u.

Webrev: http://cr.openjdk.java.net/~andrew/aarch64-8/8151841/

Ok to push?

Thanks,
-- 
Andrew :)

Senior Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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