From 7f947b602f00ea94161c98b2887479e445d9bc92 Mon Sep 17 00:00:00 2001
From: Ben Boeckel <ben.boeckel@kitware.com>
Date: Tue, 18 Apr 2017 14:11:40 -0400
Subject: ninja: remove duplicate order-only dependencies

---
 Source/cmNinjaTargetGenerator.cxx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Source/cmNinjaTargetGenerator.cxx b/Source/cmNinjaTargetGenerator.cxx
index 7fbb2fc..daad3fc 100644
--- a/Source/cmNinjaTargetGenerator.cxx
+++ b/Source/cmNinjaTargetGenerator.cxx
@@ -737,6 +737,10 @@ void cmNinjaTargetGenerator::WriteObjectBuildStatements()
                    std::back_inserter(orderOnlyDeps), MapToNinjaPath());
   }
 
+  std::sort(orderOnlyDeps.begin(), orderOnlyDeps.end());
+  orderOnlyDeps.erase(std::unique(orderOnlyDeps.begin(), orderOnlyDeps.end()),
+                      orderOnlyDeps.end());
+
   if (!orderOnlyDeps.empty()) {
     cmNinjaDeps orderOnlyTarget;
     orderOnlyTarget.push_back(this->OrderDependsTargetForTarget());
-- 
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