getfem++ not building on s390x

[Drew Parsons <dparsons@debian.org>]

getfem++ was recently upgraded to 5.3+dfsg1-1

The new version is failing on s390x, building but failing tests.  This 
is weird since usually s390x is reliable, and getfem++ builds 
successfully on all other arches (except a couple of non-official 
arches).  getfem++ built reliably on s390x before.

Error messages don't give much detail to work with 
(https://buildd.debian.org/status/fetch.php?pkg=getfem%2B%2B&arch=s390x&ver=5.3%2Bdfsg1-1&stamp=1571157503&raw=0)

Any help would be appreciated.

Drew