[ET Trac] [Einstein Toolkit] #2133: bash_utils.sh do not detect multi-arch correctly

[Einstein Toolkit]

#2133: bash_utils.sh do not detect multi-arch correctly
---------------------------------+--------------------
 Reporter:  Roland Haas          |       Type:  defect
   Status:  new                  |   Priority:  minor
Milestone:                       |  Component:  Cactus
  Version:  development version  |   Keywords:
---------------------------------+--------------------
 Currently bash_utils.sh uses {{{MACHINE:=`gcc -dumpmachine`}}} to try and
 detect the multi-arch designation. This however is not correct as shown on
 the Debian wiki:

 https://wiki.debian.org/Multiarch/Tuples#Why_not_use_GNU_triplets.3F

 In a nutshell {{{-dumpmachine}}} is too specific for intel 386 CPUs and
 not specific enough for ARM cpus.

 Instead one should try the two official ways listed on the wiki followed
 by the current one as a (not strictly correct but often working namely for
 the currently common x86_64-linux-gnu) fallback on old systems (gcc older
 than 4.9):
 {{{
 MACHINE:=$(dpkg-architecture -qDEB_HOST_MULTIARCH 2>/dev/null || gcc
 -print-multiarch 2>/dev/null || gcc -dumpmachine 2>/dev/null)
 }}}
 where the last one is just a fallback that may work often but really is
 not official.

-- 
Ticket URL: <http://cactuscode-20180221.cct.lsu.edu/trac/ticket/2133>
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