[Halld-online] gcc version for hdsys

[Elliott Wolin]

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
>
> _______________________________________________
> Halld-online mailing list
> Halld-online at jlab.org
> https://mailman.jlab.org/mailman/listinfo/halld-online

-- 

				Sincerely,
					Elliott
  

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  Those raised in a morally relative or neutral environment will hold
		    no truths to be self-evident.
				

Elliott Wolin
Staff Physicist, Jefferson Lab
12000 Jefferson Ave
Suite 8 MS 12A1
Newport News, VA 23606
757-269-7365

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