RFR: JDK-8313244: NM flags handling in configure process [v3]

[Erik Joelsson]

On Tue, 8 Aug 2023 20:50:11 GMT, Christoph Langer <clanger at openjdk.org> wrote:

> > > Looks good overall. I suggest to remove the BUILD_NM variable in this PR as well. We should then wait with a final review until some folks from the Oracle build team are back.
> > 
> > 
> > What is the motivation for removing BUILD_NM? I believe that would break cross compilation.
> 
> Hm, I guess I didn't/don't really understand how it is used. But alright then 😄

All the `BUILD_` prefixed variables replace the main variables when compiling a "BUILDJDK" during a cross compilation build. This happens in `make/autoconf/buildjdk-spec.gmk.in`. For completeness we should add a BUILD_NMFLAGS, but I think that can wait for now.

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PR Comment: https://git.openjdk.org/jdk/pull/15150#issuecomment-1671209008