From 2db5bca778981e25499a099cc13cc8efee7d1e19 Mon Sep 17 00:00:00 2001
From: Massimiliano Culpo <massimiliano.culpo@gmail.com>
Date: Tue, 7 May 2024 10:30:23 +0200
Subject: [PATCH] Warn users of the future removal of platform=cray (#43980)

---
 lib/spack/spack/solver/asp.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/spack/spack/solver/asp.py b/lib/spack/spack/solver/asp.py
index 6b2205a6bb..a6fcd6a411 100644
--- a/lib/spack/spack/solver/asp.py
+++ b/lib/spack/spack/solver/asp.py
@@ -3776,6 +3776,12 @@ class Solver:
     def __init__(self):
         self.driver = PyclingoDriver()
         self.selector = ReusableSpecsSelector(configuration=spack.config.CONFIG)
+        if spack.platforms.host().name == "cray":
+            msg = (
+                "The Cray platform, i.e. 'platform=cray', will be removed in Spack v0.23. "
+                "All Cray machines will be then detected as 'platform=linux'."
+            )
+            warnings.warn(msg)
 
     @staticmethod
     def _check_input_and_extract_concrete_specs(specs):