From 18110346c809e43e4a5438b6ff64778cb1683abc Mon Sep 17 00:00:00 2001
From: Ethan Stam <33101855+EthanS94@users.noreply.github.com>
Date: Tue, 5 Jan 2021 13:04:57 -0700
Subject: Mesa: use auto when llvm is built shared (#20683)

---
 var/spack/repos/builtin/packages/mesa/package.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/var/spack/repos/builtin/packages/mesa/package.py b/var/spack/repos/builtin/packages/mesa/package.py
index b07cfd59fd..7c8a4bfaa6 100644
--- a/var/spack/repos/builtin/packages/mesa/package.py
+++ b/var/spack/repos/builtin/packages/mesa/package.py
@@ -84,6 +84,8 @@ class Mesa(MesonPackage):
     # OpenGL ES requires OpenGL
     conflicts('~opengl +opengles')
 
+    # 'auto' needed when shared llvm is built
+    @when('^llvm~shared_libs')
     def patch(self):
         filter_file(
             r"_llvm_method = 'auto'",
-- 
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