URGENT RFR: 8041141: JDK9 emb build failure on PPC platform

Andrew Haley aph at redhat.com
Thu Jun 12 13:53:44 UTC 2014


On 06/11/2014 06:03 PM, Andrew Hughes wrote:
> I just stumbled across this when trying to work out why we are seeing aliasing
> warnings in the demo code only on PPC builds. They get flagged by our build process.
> This exclusion of fno-strict-aliasing on PPC seems to date back to 7027910 in OpenJDK
> 7, where we are seeing the warnings, and there seems to be no explanation as to why
> it was added in either the code or reviews.
> Given -fno-strict-aliasing is now being used on all architectures in 9, do you think
> it's ok to do the same in 7? I could also turn it off on the individual files, but
> this would duplicate the flag on other architectures and we may then get more PPC-only
> warnings in future.

Never mind the warnings, -fno-strict-aliasing is essential for correctness.


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