AttributeError: 'Target' object has no attribute 'lower' #12931
Description
When installing llvm I've run into a Spack error AttributeError: 'Target' object has no attribute 'lower'. There are a few other packages that also use Target.lower() but I haven't tried installing those yet.
Steps to reproduce the issue
$ spack install llvm
...Error Message
==> Building llvm [CMakePackage]
==> Executing phase: 'cmake'
==> Error: AttributeError: 'Target' object has no attribute 'lower'
/var/tmp/spack/var/spack/repos/builtin/packages/llvm/package.py:686, in cmake_args:
683 # hence the test to see if the version starts with "flang".
684 targets.append('CppBackend')
685
>> 686 if 'x86' in spec.architecture.target.lower():
687 targets.append('X86')
688 elif 'arm' in spec.architecture.target.lower():
689 targets.append('ARM')
Information on your system
Only tried a single system at this moment:
$ git rev-parse HEAD
6cd5edacca8e4cacbcaf104b3c241097fc83568f
$ uname -a
Linux p901 4.14.0-115.8.1.el7a.ppc64le #1 SMP Wed Jun 5 15:02:21 UTC 2019 ppc64le ppc64le ppc64le GNU/Linux