[ET Trac] [Einstein Toolkit] #2207: support all of C++11 in Cactus or the Einstein Toolkit

[Einstein Toolkit]

#2207: support all of C++11 in Cactus or the Einstein Toolkit
--------------------------+---------------------------------
  Reporter:  Roland Haas  |      Owner:  (none)
      Type:  enhancement  |     Status:  new
  Priority:  minor        |  Milestone:
 Component:  Cactus       |    Version:  development version
Resolution:               |   Keywords:
--------------------------+---------------------------------

Comment (by Roland Haas):

 I gained access to Vesta (or had before but not realised it). Turns out
 that even the newest IBM XL compiler (that they have, but maybe in
 general): @ibm-compilers-2017-10 which is version 12.1 (see
 https://www.ibm.com/support/knowledgecenter/en/SS2LWA) does not support
 range based for loops of the type
 {{{
 #include <vector>
 int main() {
 std::vector<int> xs(10);
    for (int& x: xs) x = 42;
 ; return 0; }
 }}}
 and fails with
 {{{
  /soft/compilers/ibmcmp-oct2017/vacpp/bg/12.1/bin/bgxlC_r -o conftest -g
 -qrtti -qlanglvl=autotypededuction -qlanglvl=decltype
 -qlanglvl=rightanglebracket:extc1x -qsuppress=1500-036 -g
 -DCARPET_AVOID_LAMBDA -DCARPET_USE_BOOST_FOREACH
 -DCARPET_USE_BOOST_SHARED_PTR -DCARPET_ENABLE_BBOXSET2
 -DCARPET_USE_BBOXSET2  conftest.C  1>&5
 "configure", line 7458.15: 1540-0063 (S) The text ":" is unexpected.
 }}}

 Thus vesta is currently not a supported machine anymore and requiring full
 C++11 support is not going to make things any worse. Also, given that the
 change requiring range based for loops is from Tue Apr 26 07:47:33 2016
 -0400 git hash 86d7765529c63b69d58d869248f9c2080f53978b "Cactus: Enable
 C++11 by default, and require it" and that no one complained so far, it
 seems safe to state that vesta is not used by anyone.

 I would thus suggest to mark it in simfactory as only supporting
 ET_2015_11 which is the release before range based loops became mandatory.

-- 
Ticket URL: <https://trac.einsteintoolkit.org/ticket/2207#comment:4>
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