RFR [XS] : 8218562: handle HOTSPOT_BUILD_COMPILER for clang/xlclang and cleanup HOTSPOT_BUILD_COMPILER settings

[Magnus Ihse Bursie]

On 2019-02-07 10:36, David Holmes wrote:
> Hi Matthias,
>
> On 7/02/2019 1:17 am, Baesken, Matthias wrote:
>> Hello, please review this small change .
>>
>> I noticed (when looking into AIX xlc16 / xlclang++)  the 
>> following:    in the case that  clang is used for compilation,    
>> HOTSPOT_BUILD_COMPILER   claims to be a gcc .
>> This is a bit misleading.
>> This change  adjusts the setting for clang usage on  AIX  (for future 
>> usage with xlclang++)   and macOSX.
>>
>> Additionally I removed some  old  HOTSPOT_BUILD_COMPILER   for legacy 
>> Oracle / Sun Studio versions ).
>
> Possibly more could be removed :)
>
> Changes seem fine.
>
> I've always been irked by the fact we can access an actual version 
> string from the compilers themselves, so we wouldn't need this code.
How do you do that?

I'm having this kind of background low-intensity itch to fix the 
duplication between hotspot and build system in this (and related system 
detection code). It never rises to enough annoyance to actually get me 
to do anything about it, though.

/Magnus


>
> Thanks,
> David
>
>>
>> Bug/webrev :
>>
>> https://bugs.openjdk.java.net/browse/JDK-8218562
>>
>> http://cr.openjdk.java.net/~mbaesken/webrevs/8218562.0/
>>
>>
>> Thanks, Matthias
>>