From ffc3272a2b5e1533c1002e8172145d01075910cb Mon Sep 17 00:00:00 2001
From: Nils Leif Fischer <nils.fischer@aei.mpg.de>
Date: Tue, 4 Jan 2022 10:31:55 +0100
Subject: charmpp: add conflict with +shared on macOS with GCC (#28211)

---
 var/spack/repos/builtin/packages/charmpp/package.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/var/spack/repos/builtin/packages/charmpp/package.py b/var/spack/repos/builtin/packages/charmpp/package.py
index 63a33c33ea..923780256a 100644
--- a/var/spack/repos/builtin/packages/charmpp/package.py
+++ b/var/spack/repos/builtin/packages/charmpp/package.py
@@ -127,6 +127,10 @@ class Charmpp(Package):
     conflicts("backend=multicore", "+smp")
     conflicts("backend=ucx", when="@:6.9")
 
+    # Shared-lib builds with GCC are broken on macOS:
+    # https://github.com/UIUC-PPL/charm/issues/3181
+    conflicts("+shared", when="platform=darwin %gcc")
+
     @property
     def charmarch(self):
         plat = sys.platform
-- 
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