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

[Martin Doerr]

On Wed, 14 Feb 2024 22:43:37 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> Please review this change that updates the minimum supported version of IBM
> Open XL C/C++.  SAP dropped support for older versions in JDK 22, only
> supporting the version specified in this change.
> 
> I need someone from the aix-ppc porters to test and review the change.

Your current version still serves the purpose of disallowing usage of xlc 16 and below. Users of the old compiler will get to know which compiler to use at minimum.
Users of any Open XL compilers are not affected because "TOOLCHAIN_MINIMUM_VERSION_xlc" is not used for that AFAICS. But that's ok IMHO because the minimum clang check will be in place and the supported compilers are documented (https://wiki.openjdk.org/display/Build/Supported+Build+Platforms).
So, I think this PR could get integrated and the old build pipeline get removed in a separate PR. Do you agree @JoKern65?

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PR Comment: https://git.openjdk.org/jdk/pull/17857#issuecomment-1978274678