[Halld-online] gcc version for hdsys

[Hovanes Egiyan]

Hi Elliott,
as you pointed out, at this point it is not in /gapps area, therefore it 
is not
supported on the online computers. The reason why it is not there is 
that there are
many other things Paul is working on. If you want to use  gcc in the 
/apps area,
please do it, but it should not be put in the shell initialization 
script for the
production account.
Hovanes.


On 11/20/2013 09:50 AM, Elliott Wolin wrote:
> Hi,
>
> The actual situation according to Kelvin is as follows:
>
> RedHat distributes gcc 4.4.x with RHEL6 and officially supports it.
>
> The Computer Center officially supports additional versions of gcc, 
> including gcc 4.8.0.  These typically appear in /apps, but may appear 
> in other places such as /gapps.
>
> Thus gcc 4.8.0 is officially supported on the online machines by the 
> CC, and indeed most of the code I've developed requires 4.8.x (i.e. 
> C++11).  Although not urgent, Paul and Kelvin said they'd officially 
> install gcc 4.8.1 in /gapps at some point (gcc 4.8.1 completes 
> language support for C++11).
>
> Thus my understanding is that  gcc 4.8.x is officially supported by 
> the CC, and one can freely use it on the online cluster without much 
> risk.
>
> One potential risk is that a bug shows up in gcc 4.8.x that hasn't 
> been fixed by GNU...clearly the CC will not track it down and fix it.  
> But this kind of risk is common to all public domain software. Note 
> that RedHat will fix bugs in some public domain software they 
> distribute, so RedHat support is stronger than CC support in this regard.
>
>
>
>
> On 11/19/2013 10:14 PM, Hovane Egiyan wrote:
>> Hi,
>>
>> the version of the gcc compiler was changed some time ago announced 
>> for all
>> "hdsys" account in the shell initialization script to version 4.8. I
>> restored it back to 4.4.7,
>> the default version for RHEL6.4. Anyone who wants to build his/her
>> online code using gcc 4.8 is
>> welcome to do so for their code at their own risk, but the version 4.8
>> is not officially
>> supported on the online machines.
>>
>> Best,
>>       Hovanes
>>
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>