RFR: 8325880: Require minimum Open XL C/C++ version 17.1.1

[Joachim Kern]

On Thu, 15 Feb 2024 12:49:26 GMT, Julian Waters <jwaters at openjdk.org> wrote:

> > > I see. I believe I wrote that piece of code, but I'd clearly forgotten that. 😕 Thanks! :)
> > 
> > 
> > No, this was added by me, because this was the root point to still resolve to globalDefinitions_xlc.hpp even with toolchain clang
> 
> Shame that we can't fully swap to clang in some areas for AIX, but oh well

Although the compiler is now clang, the headers are still the old IBM ones and globalDefinitions_xlc.hpp is not consumable by other clang implementations. So if we change this we still have to differentiate between AIX clang and  other clangs.

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PR Comment: https://git.openjdk.org/jdk/pull/17857#issuecomment-1946086792