Fix unused function warning.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75386 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/bugpoint/ToolRunner.cpp b/tools/bugpoint/ToolRunner.cpp
index 7087cdd..e00a2b9 100644
--- a/tools/bugpoint/ToolRunner.cpp
+++ b/tools/bugpoint/ToolRunner.cpp
@@ -543,6 +543,7 @@
 // GCC abstraction
 //
 
+#ifdef __APPLE__
 static bool
 IsARMArchitecture(std::vector<std::string> Args)
 {
@@ -558,6 +559,7 @@
 
   return false;
 }
+#endif
 
 int GCC::ExecuteProgram(const std::string &ProgramFile,
                         const std::vector<std::string> &Args,