Integrated: 8288101: False build warning-as-error with GCC 9 after JDK-8214976

[Aleksey Shipilev]

On Thu, 9 Jun 2022 16:35:54 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> gcc version 9.4.0 (also 9.3.1) produces build warning after [JDK-8214976](https://bugs.openjdk.org/browse/JDK-8214976):
> 
> 
> os_posix.cpp:786:34: error: call to 'exit' declared with attribute warning: use os::exit [-Werror=attribute-warning]
>   786 | ALLOW_C_FUNCTION(::exit, ::exit(num);)
>       | ~~~~~~^~~~~
> 
> 
> Apparently, GCC 9 has a bug with nesting pragmas. The [Godbolt experiments](https://godbolt.org/z/vonsqEnK6) show this only affects GCC 9, and there are no easy way to restructure the macros to dodge this, so the way out to bump the requirement for new macros to GCC >= 10.
> 
> Additional testing:
>  - [x] Linux x86_64 build with GCC 9.4.0 (now passes without warnings)
>  - [x] Linux x86_64 build with GCC 10.2.1 (still passes)

This pull request has now been integrated.

Changeset: d9c1364d
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.org/jdk19/commit/d9c1364ddecde7e56e165b86e55dc23bda4ff921
Stats:     5 lines in 1 file changed: 3 ins; 0 del; 2 mod

8288101: False build warning-as-error with GCC 9 after JDK-8214976

Reviewed-by: mdoerr, zgu, kbarrett

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PR: https://git.openjdk.org/jdk19/pull/1