[OpenJDK 2D-Dev] RFR: 8246032: Implementation of JEP 347: Adopt C++14 Language Features in HotSpot

Magnus Ihse Bursie magnus.ihse.bursie at oracle.com
Fri Jun 5 23:57:54 UTC 2020

On 2020-06-05 09:52, Kim Barrett wrote:
> [Changes are only to the build system, but since the changes have jdk-wide
> effect I’ve cc’d what I think are the relevant dev lists.]
> This change is part of JEP 347; the intent is to target JDK 16.
> Please review this change to the building of C++ code in the JDK to
> enable the use of C++14 language features.  This change does not make
> any code changes to use new features provided by C++11 or C++14.
> This requires trimming the supported compiler versions, moving the
> minimum supported versions forward (significantly, in some cases).
> The new minimums are based on compiler documentation rather than
> testing.  It may be that more recent versions are actually required.
> This change needs to be tested on platforms not supported by Oracle.
> The JEP test plan includes additional Oracle testing beyond what I’ve done.
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8246032
> Webrev:
> https://cr.openjdk.java.net/~kbarrett/8246032/open.02/
Looks good to me.


> Testing:
> mach5 tier1-5 on Oracle supported platforms.
> Performance testing showed no significant changes in either direction.
> Build-only (no tests) for linux-arm32, linux-s390x, linux-ppc64le

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