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

[Joachim Kern]

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.

make/autoconf/toolchain.m4 line 56:

> 54: TOOLCHAIN_MINIMUM_VERSION_gcc="6.0"
> 55: TOOLCHAIN_MINIMUM_VERSION_microsoft="19.28.0.0" # VS2019 16.8, aka MSVC 14.28
> 56: TOOLCHAIN_MINIMUM_VERSION_xlc="17.1.1.4"

We do not build AIX with the xlc toolchain any more but the clang one. So this line only stops a build if someone is trying to build with xlc 16 against toolchain xlc.
I have to agree to @TheRealMDoerr, that the correct change would be to remove the xlc toolchain in jdk23 at all.

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PR Review Comment: https://git.openjdk.org/jdk/pull/17857#discussion_r1490650675