On 6 May 2016 at 17:13, Hans Dembinski
Yes, I am sure.
Here is evidence: http://information-technology.web.cern.ch/fr/services/lxplus-service "[The cluster computers] run SLC6 (Scientific Linux CERN 6)"
SLC6 comes with gcc-4.4.7, which has bad support for C++11, see the question of a suffering user (most likely a CERN physicist):
http://stackoverflow.com/questions/15975481/problems-with-c11-library-and-g-...
Currently, I am a member of the IceCube experiment and we are also not allowed to use C++11 features.
Right, and that is just a variant of RHEL6, whose native compiler is indeed gcc 4.4.x. The various DTS are still availabe to get access to more modern compilers, see http://linux.web.cern.ch/linux/devtoolset/ DTS 2 is gcc 4.8.x and 3 is 4.9.x, 4 is 5.2.x. All can be installed on SLC6, and any binary compiled with those tools will run on RHEL6/CentOS6/SLC6 without needing to install anything.