RFR: 8293887: AArch64 build failure with GCC 12 due to maybe-uninitialized warning in libfdlibm k_rem_pio2.c [v2]

[Hao Sun]

On Fri, 23 Sep 2022 12:47:24 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> Thanks for your review.
>> 
>> Your mentioned solution should work and we can also enable the pragma only for aarch64 + gcc>=12 condition.
>> I considered such a solution when preparing this patch.
>> 
>> But I personally prefer to suppress the waring in the makefile, mainly because fdlibm is 3rd party library and we'd better not changing the source code. I think it is a long-standing policy.
>
> Yes, we should not modify 3rd party code.
> 
> What you would need is [JDK-8294281](https://bugs.openjdk.org/browse/JDK-8294281). If you can hold back this patch for a little while, you'll be able to utilize it instead.

Thanks for your info @magicus.

Updated the code using [JDK-8294281](https://bugs.openjdk.org/browse/JDK-8294281) in the latest commit.
Would you mind taking another look? Thanks! @theRealAph  @magicus

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PR: https://git.openjdk.org/jdk/pull/10386