RFR: 8265473: Move os::Linux to its own header file [v4]

[David Holmes]

On Tue, 12 Jul 2022 19:33:13 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> Can we still entertain my os_linux_impl.hpp proposal for now?

The namespace discussion was just a sidebar and we're not going to go with namespaces. So that just brings things back to what you proposed above.

> My proposal is to remove all os- and platform- specific includes from os.hpp. The os class should include only functions that are usable from shared code.

 I don't like the original proposal and don't want to see it as an interim step until "something better" comes along. This is not a critical problem that must be solved today.

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PR: https://git.openjdk.org/jdk/pull/9423