is this the issue that you faced with latest llvm?

[Maurizio Cimadamore]

Thanks - I already tweaked that locally and triggered another build/test 
cycle

Maurizio

On 03/05/2019 15:49, Jorn Vernee wrote:
> Updated webrev: 
> http://cr.openjdk.java.net/~jvernee/panama/webrevs/llvmconf/webrev.01/
>
> Cheers,
> Jorn
>
> Jorn Vernee schreef op 2019-05-03 16:45:
>> Ah, sorry. This was left from when I was testing with allowing
>> multiple different version, e.g. `grep -P "^(10|9|8)"` or similar. The
>> default grep regex didn't seem to support that syntax, so I went with
>> perl regex, and didn't realize this wouldn't work everywhere.
>>
>> The -P option can just be removed for the current implementation.
>> Maybe if we want to support multiple different version we will have to
>> look into that again.
>>
>> Jorn
>>
>> Maurizio Cimadamore schreef op 2019-05-03 16:41:
>>> On 03/05/2019 15:38, Maurizio Cimadamore wrote:
>>>> seems like an issue with grep?
>>>
>>> Yeah
>>>
>>> -P, --perl-regexp
>>>               Interpret the pattern as a  Perl-compatible regular  
>>> expression
>>>               (PCRE).   This  is  highly  experimental and grep -P 
>>> may warn of
>>>               unimplemented features.
>>>
>>> Why did you go for Perl-style?
>>>
>>> Maurizio