[Halld-offline] What version number of the C++ compiler do you use?

Curtis A. Meyer cmeyer at cmu.edu
Fri Jan 8 17:38:38 EST 2016

At CMU, the default is

gcc version 4.4.7 20120313 (Red Hat 4.4.7-11) (GCC)

but we have 

gcc version 4.9.2 (GCC)

installed in a non-standard but useable area. We could fairly easily flip to this version.

Curtis A. Meyer			MCS Associate Dean for Faculty and Graduate Affairs
Wean:    (412) 268-2745	Professor of Physics
Doherty: (412) 268-3090	Carnegie Mellon University
Fax:         (412) 681-0648	Pittsburgh, PA 15213
curtis.meyer at cmu.edu	http://www.curtismeyer.com/

> On Jan 8, 2016, at 5:05 PM, Mark Ito <marki at jlab.org> wrote:
> At the last Offline Software meeting we decided to poll the collaboration about the versions of C++ compilers being used outside of JLab. This is that request for information.
> With the advent of C++11 (see https://en.wikipedia.org/wiki/C%2B%2B11), C++ compilers have been adding new language features over the past few years. The latest versions of Geant4 and ROOT6 now require GCC 4.8 or later. However, many of the Linux distributions we are now using, including those on the JLab farm, use GCC 4.4 by default. In particular RedHat 6 (at least as installed at JLab) uses 4.4.7. (The computer center has a 4.8 version available in /apps should we need it, but it is not the default.)
> For the immediate future this is not a problem since our mainline code is wholly compatible with GCC 4.4. But the day will come soon when we may want to take advantage of the new language features, or indeed we may be forced to do so.
> To plan for a future transition, we would appreciate a short email message, to the list or to me, letting us know what C++ compiler (it may not be GCC) and which version of that compiler you are commonly using. I will compile the results and publish them.
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