From 7d92085edd0a8e91a908ecb28fd8f9a20ef0c2cb Mon Sep 17 00:00:00 2001
From: Rolf Bjarne Kvinge <rolf@xamarin.com>
Date: Thu, 1 Mar 2018 14:59:25 +0100
Subject: [PATCH] [xharness] Always build the test libraries before doing
 anything else. (#3601) (#3621)

Fixes an issue where multiple projects would try to build the test libraries simultaneously.
---
 tests/xharness/Jenkins.cs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tests/xharness/Jenkins.cs b/tests/xharness/Jenkins.cs
index 44a2e37d77..76cd32cfac 100644
--- a/tests/xharness/Jenkins.cs
+++ b/tests/xharness/Jenkins.cs
@@ -894,6 +894,7 @@ namespace xharness
 					populating = false;
 				}).Wait ();
 				GenerateReport ();
+				BuildTestLibraries ();
 				if (!IsServerMode) {
 					foreach (var task in Tasks)
 						tasks.Add (task.RunAsync ());
@@ -912,6 +913,11 @@ namespace xharness
 			get { return Harness.JenkinsConfiguration == "server"; }
 		}
 
+		void BuildTestLibraries ()
+		{
+			ProcessHelper.ExecuteCommandAsync ("make", $"all -j{Environment.ProcessorCount} -C {StringUtils.Quote (Path.Combine (Harness.RootDirectory, "test-libraries"))}", MainLog, TimeSpan.FromMinutes (1)).Wait ();
+		}
+
 		Task RunTestServer ()
 		{
 			var server = new HttpListener ();