RFR: 8315794: RISC-V: build fails with GCC 12.3

[Antonios Printezis]

On Wed, 6 Sep 2023 14:29:56 GMT, Antonios Printezis <tonyp at openjdk.org> wrote:

> The build failure happens when building on RISC-V with GCC 12.3. Is there a better way to address this than disabling the stringop-overflow warnings for the two files in question?

How about something like this in `zPageAllocator.cpp` / `xPageAllocator.cpp` as a compromise?


+    PRAGMA_DIAG_PUSH
+    PRAGMA_STRINGOP_OVERFLOW_IGNORED
     // Record flushed pages as claimed
     Atomic::add(&_claimed, flushed);
+    PRAGMA_DIAG_POP


This should only disable the warning for the two uses of `Atomic::add()` that exhibit the issue.

@kimbarrett @erikj79 I know you two had concerns about disabling the warning for the entire files. Does this look reasonable?

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PR Comment: https://git.openjdk.org/jdk/pull/15593#issuecomment-1724243655