From a27f2978b901e354053fa0059b35f32e950e8ba1 Mon Sep 17 00:00:00 2001
From: George Zagaris <zagaris2@llnl.gov>
Date: Mon, 13 May 2019 12:53:23 -0700
Subject: [PATCH] m4 package: fix OS version check (#11290)

f242f5f removed spec.architecture.platform_os, which was used to test
an option in the 'm4' package. The attribute is now accessed as
'spec.architecture.os'.
---
 var/spack/repos/builtin/packages/m4/package.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/var/spack/repos/builtin/packages/m4/package.py b/var/spack/repos/builtin/packages/m4/package.py
index ad180b15a8..71ed3d1da4 100644
--- a/var/spack/repos/builtin/packages/m4/package.py
+++ b/var/spack/repos/builtin/packages/m4/package.py
@@ -51,7 +51,7 @@ def configure_args(self):
 
         # http://lists.gnu.org/archive/html/bug-m4/2016-09/msg00002.html
         arch = spec.architecture
-        if (arch.platform == 'darwin' and arch.platform_os == 'sierra' and
+        if (arch.platform == 'darwin' and arch.os == 'sierra' and
             '%gcc' in spec):
             args.append('ac_cv_type_struct_sched_param=yes')
 
-- 
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