From 97beb51d92895e34c2dc8ff8b859b814d0c50f6c Mon Sep 17 00:00:00 2001
From: Brian Robbins <brianrob@microsoft.com>
Date: Fri, 12 May 2017 12:22:06 -0700
Subject: [PATCH] Only call EventActivityIdControl ETW function on Windows.
 (#11549)

---
 src/mscorlib/src/System/Diagnostics/Eventing/EventSource_CoreCLR.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mscorlib/src/System/Diagnostics/Eventing/EventSource_CoreCLR.cs b/src/mscorlib/src/System/Diagnostics/Eventing/EventSource_CoreCLR.cs
index b691dd3..bf9e038 100644
--- a/src/mscorlib/src/System/Diagnostics/Eventing/EventSource_CoreCLR.cs
+++ b/src/mscorlib/src/System/Diagnostics/Eventing/EventSource_CoreCLR.cs
@@ -33,7 +33,7 @@ namespace System.Diagnostics.Tracing
         {
             if (TplEtwProvider.Log != null)
                 TplEtwProvider.Log.SetActivityId(activityId);
-#if FEATURE_MANAGED_ETW
+#if FEATURE_MANAGED_ETW && PLATFORM_WINDOWS
 #if FEATURE_ACTIVITYSAMPLING
             Guid newId = activityId;
 #endif // FEATURE_ACTIVITYSAMPLING
@@ -57,7 +57,7 @@ namespace System.Diagnostics.Tracing
                 }
 #endif // FEATURE_ACTIVITYSAMPLING
             }
-#endif // FEATURE_MANAGED_ETW
+#endif // FEATURE_MANAGED_ETW && PLATFORM_WINDOWS
         }
 
         /// <summary>
-- 
2.7.4