From 4c055630d545d3ec9c919d20485f6f85f8f8d6b3 Mon Sep 17 00:00:00 2001
From: "Nichols A. Romero" <naromero77@users.noreply.github.com>
Date: Wed, 24 Jun 2020 02:52:27 -0500
Subject: [PATCH] quantum-espresso: correctly cross-compile code for Cray and
BG/Q (#17180)
---
.../builtin/packages/quantum-espresso/package.py | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/var/spack/repos/builtin/packages/quantum-espresso/package.py b/var/spack/repos/builtin/packages/quantum-espresso/package.py
index 3c8b2c9d02..35454ae3ef 100644
--- a/var/spack/repos/builtin/packages/quantum-espresso/package.py
+++ b/var/spack/repos/builtin/packages/quantum-espresso/package.py
@@ -224,6 +224,19 @@ def install(self, spec, prefix):
prefix_path = prefix.bin if '@:5.4.0' in spec else prefix
options = ['-prefix={0}'.format(prefix_path)]
+ # This additional flag is needed anytime the target architecture
+ # does not match the host architecture, which results in a binary that
+ # configure cannot execute on the login node. This is how we detect
+ # cross compilation: If the platform is NOT either Linux or Darwin
+ # and the target=backend, that we are in the cross-compile scenario
+ # scenario. This should cover Cray, BG/Q, and other custom platforms.
+ # The other option is to list out all the platform where you would be
+ # cross compiling explicitly.
+ if not (spec.satisfies('platform=linux') or
+ spec.satisfies('platform=darwin')):
+ if spec.satisfies('target=backend'):
+ options.append('--host')
+
# QE autoconf compiler variables has some limitations:
# 1. There is no explicit MPICC variable so we must re-purpose
# CC for the case of MPI.
--
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