RFR: 8327701: Remove the xlc toolchain [v2]

[Magnus Ihse Bursie]

On Tue, 12 Mar 2024 15:07:15 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>>> Is Open XL C/C++ considered a compiler or more akin to a development environment like Xcode is for macOS? Depending on which, we could just say clang is the compiler for AIX without needing to say that Open XL is treated like clang, etc
>> 
>> You are raising a good point. Our current concept of "toolchain" is not working as smoothly as it should be. We should probably split it into "toolchain environment" (or whatever), like Xcode or Open XL, and "toolchain compiler" (like clang), and/or possibly also some concept of "toolchain sdk".
>> 
>> The work you are doing of untangling Windows from Visual Studio would probably influence such a redesign, seeing what part of the Windows adaptions which arise from cl, and which are constant given that you compile for windows (like the Windows SDK).
>> 
>> But this is a more architectural issue that will need to be resolved in another PR, and probably discussed quite a bit beforehand.
>
>> why did this remove the link to the Supported Build Platforms page?
> 
> You make it sound like it is a bad thing, but in fact I promoted the AIX build to be of the same status as all other platforms. I cowardly did not put anything specific about the AIX build in the readme before, but just referred to the wiki. Now I decided we should actually treat this as a proper platform and describe the compiler version in the readme, since it is checked in configure, just like all other platforms.
> 
> There is still a link to the Supported Build Platforms wiki page in the general part of the readme.

> It is clang 15 not 13. Clang 13 was in 17.1.0

Thanks! Fixed.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/18172#discussion_r1521646622