From d8294fefe8063cc2e0a0cfecf7fd8fef619cf0da Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Tue, 25 Sep 2018 10:08:57 -0400
Subject: cmake: Fix generator platform under --build mode

---
 Source/cmake.cxx | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index c26a380..889a5fb 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -2467,6 +2467,14 @@ int cmake::Build(int jobs, const std::string& dir, const std::string& target,
       return 1;
     }
   }
+  const char* cachedGeneratorPlatform =
+    this->State->GetCacheEntryValue("CMAKE_GENERATOR_PLATFORM");
+  if (cachedGeneratorPlatform) {
+    cmMakefile mf(gen, this->GetCurrentSnapshot());
+    if (!gen->SetGeneratorPlatform(cachedGeneratorPlatform, &mf)) {
+      return 1;
+    }
+  }
   std::string output;
   std::string projName;
   const char* cachedProjectName =
-- 
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