RFR: 8263718: unused-result warning happens at os_linux.cpp

[Magnus Ihse Bursie]

On Wed, 17 Mar 2021 13:35:36 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:

>> I see. I found this page:
>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425
>
> Thanks @stefank !
> Status of the Bugzilla ticket which you told is unconfirmed (and it does not seem to be updated since last year!).
> 
> I want to suppress the warning if we cannot remove `alloca()` call.

Did you notice this workaround in the gcc bug report?

"Note that a logical negation prior to cast to void is sufficient to suppress the warning:

  int void_cast_should_not_warn() {
     (void) !foo();
     //     ^-- here
     return 0;
  }
"

-------------

PR: https://git.openjdk.java.net/jdk/pull/3042