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-rw-r--r--lib/spack/spack/spec.py7
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/spack/spack/spec.py b/lib/spack/spack/spec.py
index 94d881da28..28cd6a0274 100644
--- a/lib/spack/spack/spec.py
+++ b/lib/spack/spack/spec.py
@@ -461,12 +461,17 @@ class Spec(object):
def _set_architecture(self, architecture):
"""Called by the parser to set the architecture."""
if self.architecture: raise DuplicateArchitectureError(
- "Spec for '%s' cannot have two architectures." % self.name)
+ "Spec for '%s' cannot have two architectures." % self.name)
if '-' in architecture:
os, target = architecture.split('-')
+
elif architecture == 'frontend' or architecture == 'backend':
os = architecture
target = architecture
+ else:
+ os = None
+ target = architecture
+
self.architecture = spack.architecture.Arch(os, target)