Temporarily only enable 'open' check on Mac OS X to unbreak Windows buildbot.  I'm
looking into an alternate fix right now.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100816 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Checker/UnixAPIChecker.cpp b/lib/Checker/UnixAPIChecker.cpp
index 0c9a45f..213e798 100644
--- a/lib/Checker/UnixAPIChecker.cpp
+++ b/lib/Checker/UnixAPIChecker.cpp
@@ -15,9 +15,13 @@
 #include "GRExprEngineInternalChecks.h"
 #include "clang/Checker/PathSensitive/CheckerVisitor.h"
 #include "clang/Checker/BugReporter/BugType.h"
+#include "clang/Analysis/Support/Optional.h"
 #include "llvm/ADT/StringSwitch.h"
 #include <fcntl.h>
 
+#include "clang/Basic/TargetInfo.h"
+
+
 using namespace clang;
 
 namespace {
@@ -57,6 +61,9 @@
 //===----------------------------------------------------------------------===//
 
 static void CheckOpen(CheckerContext &C, const CallExpr *CE, BugType *&BT) {
+  if (C.getASTContext().Target.getTriple().getVendor() != llvm::Triple::Apple)
+    return;
+  
   LazyInitialize(BT, "Improper use of 'open'");
 
   // Look at the 'oflags' argument for the O_CREAT flag.