RFR (tedious) 8216022: Use #pragma once

[Daniel D. Daugherty]

Since Solaris-X64 is currently stuck at Oracle Studio 12u4
due to the lack of a devkit, this change will break the
ability to build and test on Solaris-X64.

Dan


On 1/4/19 4:38 AM, Erik Österlund wrote:
> Hi Matthias,
>
> The #pragma once support was added in Oracle Studio 12u5, which is 
> what I have been patiently been waiting for. Having said that, I would 
> recommend using 12u6.
>
> Thanks for confirming that xlc 12.1 / AIX works.
>
> /Erik
>
> On 2019-01-04 08:57, Baesken, Matthias wrote:
>> Hello   Coleen,   on Solaris  Sparc with  Oracle Studio  12u4  
>> Oct2017  version   we get
>>
>> " line 25: Error: Unrecognized #pragma once"
>>
>> Which  Oracle Studio version do you recommend to use  ?
>>
>>
>> (good news is  that xlc 12.1  / AIX  works )
>>
>>
>> Best regards, Matthias
>>
>>
>>> Message: 2
>>> Date: Wed, 2 Jan 2019 21:16:59 -0500
>>> From: coleen.phillimore at oracle.com
>>> To: hotspot-dev developers <hotspot-dev at openjdk.java.net>, John Paul
>>>     Adrian Glaubitz <glaubitz at physik.fu-berlin.de>
>>> Subject: RFR (tedious) 8216022: Use #pragma once
>>> Message-ID: <9250036e-8696-6103-6c3f-513fa11ffebd at oracle.com>
>>> Content-Type: text/plain; charset=utf-8; format=flowed
>>>
>>> Summary: change include guards to #pragma once, except in generated
>>> header files.
>>>
>>> Tested with mach5 for linux-x64{-debug}, solaris-sparc, macosx-x64,
>>> windows-x64, built aarch64 with cross compiler, and zero.
>>>
>>> Ran tier1 and 2 tests.
>>>
>>> The webrev is huge but there are only 3 lines changed in each header
>>> file.? So click on the patch.
>>>
>>> I'll update the copyright headers with a script with the commit. Also,
>>> will do this after the shenandoah copyright headers are fixed.
>>>
>>> Adrian: I included you to check your platforms.
>>>
>>> Happy New Year!
>>> Coleen
>>>
>>>
>>> ------------------------------
>> ....
>>
>>> Here is the webrev and bug link.
>>>
>>> open webrev at http://cr.openjdk.java.net/~coleenp/8216022.01/webrev
>>> bug link https://bugs.openjdk.java.net/browse/JDK-8216022
>>>
>