diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
index 509c7a428f6b..c09b75f990e5 100644
--- a/clang/CMakeLists.txt
+++ b/clang/CMakeLists.txt
@@ -421,6 +421,29 @@ else()
 endif()
 add_subdirectory(examples)
 
+if(APPLE)
+  # this line is needed as a cleanup to ensure that any CMakeCaches with the old
+  # default value get updated to the new default.
+  if(CLANG_ORDER_FILE STREQUAL "")
+    unset(CLANG_ORDER_FILE CACHE)
+    unset(CLANG_ORDER_FILE)
+  endif()
+
+
+  set(CLANG_ORDER_FILE ${CMAKE_CURRENT_BINARY_DIR}/clang.order CACHE FILEPATH
+    "Order file to use when compiling clang in order to improve startup time (Darwin Only - requires ld64).")
+
+  if(NOT EXISTS ${CLANG_ORDER_FILE})
+    string(FIND "${CLANG_ORDER_FILE}" "${CMAKE_CURRENT_BINARY_DIR}" PATH_START)
+    if(PATH_START EQUAL 0)
+      file(WRITE ${CLANG_ORDER_FILE} "\n")
+    else()
+      message(FATAL_ERROR "Specified order file '${CLANG_ORDER_FILE}' does not exist.")
+    endif()
+  endif()
+endif()
+
+
 if( CLANG_INCLUDE_TESTS )
   if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest/include/gtest/gtest.h)
     add_subdirectory(unittests)
@@ -455,29 +478,6 @@ if( CLANG_INCLUDE_DOCS )
   add_subdirectory(docs)
 endif()
 
-
-if(APPLE)
-  # this line is needed as a cleanup to ensure that any CMakeCaches with the old
-  # default value get updated to the new default.
-  if(CLANG_ORDER_FILE STREQUAL "")
-    unset(CLANG_ORDER_FILE CACHE)
-    unset(CLANG_ORDER_FILE)
-  endif()
-
-
-  set(CLANG_ORDER_FILE ${CMAKE_CURRENT_BINARY_DIR}/clang.order CACHE FILEPATH
-    "Order file to use when compiling clang in order to improve startup time (Darwin Only - requires ld64).")
-
-  if(CLANG_ORDER_FILE AND NOT EXISTS ${CLANG_ORDER_FILE})
-    string(FIND "${CLANG_ORDER_FILE}" "${CMAKE_CURRENT_BINARY_DIR}" PATH_START)
-    if(PATH_START EQUAL 0)
-      file(WRITE ${CLANG_ORDER_FILE} "\n")
-    else()
-      message(FATAL_ERROR "Specified order file '${CLANG_ORDER_FILE}' does not exist.")
-    endif()
-  endif()
-endif()
-
 add_subdirectory(cmake/modules)
 
 if(CLANG_STAGE)
diff --git a/clang/utils/perf-training/CMakeLists.txt b/clang/utils/perf-training/CMakeLists.txt
index 07d90246107b..c046a1dac40b 100644
--- a/clang/utils/perf-training/CMakeLists.txt
+++ b/clang/utils/perf-training/CMakeLists.txt
@@ -40,7 +40,7 @@ if(LLVM_BUILD_INSTRUMENTED)
 endif()
 
 find_program(DTRACE dtrace)
-if(DTRACE)
+if(APPLE AND DTRACE)
   configure_lit_site_cfg(
     ${CMAKE_CURRENT_SOURCE_DIR}/order-files.lit.site.cfg.in
     ${CMAKE_CURRENT_BINARY_DIR}/order-files/lit.site.cfg
@@ -56,6 +56,10 @@ if(DTRACE)
     COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/perf-helper.py clean ${CMAKE_CURRENT_BINARY_DIR} dtrace
     COMMENT "Clearing old dtrace data")
 
+  if(NOT CLANG_ORDER_FILE)
+    message(FATAL_ERROR "Output clang order file is not set")
+  endif()
+
   add_custom_target(generate-order-file
     COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/perf-helper.py gen-order-file --binary $<TARGET_FILE:clang> --output ${CLANG_ORDER_FILE} ${CMAKE_CURRENT_BINARY_DIR}
     COMMENT "Generating order file"