From 66c0b36d75e16d4b62022b498df06440a843fdd6 Mon Sep 17 00:00:00 2001
From: Pavel Solodovnikov <pa.solodovnikov@tensor.ru>
Date: Wed, 20 Dec 2017 11:18:11 +0300
Subject: objlib: fix unchecked insertions in `cmGeneratorTarget::GetLanguages`

---
 Source/cmGeneratorTarget.cxx | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Source/cmGeneratorTarget.cxx b/Source/cmGeneratorTarget.cxx
index 103d034..2cf53cc 100644
--- a/Source/cmGeneratorTarget.cxx
+++ b/Source/cmGeneratorTarget.cxx
@@ -5133,7 +5133,12 @@ void cmGeneratorTarget::GetLanguages(std::set<std::string>& languages,
       std::string objLib = extObj->GetObjectLibrary();
       if (cmGeneratorTarget* tgt =
             this->LocalGenerator->FindGeneratorTargetToUse(objLib)) {
-        objectLibraries.push_back(tgt);
+        auto const objLibIt =
+          std::find_if(objectLibraries.cbegin(), objectLibraries.cend(),
+                       [tgt](cmGeneratorTarget* t) { return t == tgt; });
+        if (objectLibraries.cend() == objLibIt) {
+          objectLibraries.push_back(tgt);
+        }
       }
     }
   }
-- 
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