[PATCH] build-many-glibcs.py: Add ISL (0.24) support

[Florian Weimer]

* H. J. Lu:

> On Thu, Dec 23, 2021 at 10:40 AM Florian Weimer <fweimer@redhat.com> wrote:
>>
>> What's the motiviation for this?  I thought ISL is optional?
>>
>> Thanks,
>> Florian
>>
>
> The motivation is to use build-many-glibcs.py to build Linux cross
> compiler, which is as close to the native Linux compiler as possible,
> not just for checking glibc.  For building a Linux cross compiler, it is
> much more convenient than other alternatives.

Are all distributions using ISL?  I thought some do, others don't?

Thanks,
Florian