[CMake] Trying to fix a bot failure I introduced in r259862

CMake caching behavior makes me sad.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@259864 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/tools/driver/CMakeLists.txt b/tools/driver/CMakeLists.txt
index 2971bf868efed10a5986b31a6de75752a0ef93e4..c6818af5ae1551fe60ca0f5d868a58065e23be0d 100644 (file)
--- a/tools/driver/CMakeLists.txt
+++ b/tools/driver/CMakeLists.txt
@@ -90,7 +90,7 @@ endif()
 check_cxx_compiler_flag("-Wl,-order_file,${CLANG_ORDER_FILE}"
   LINKER_HAS_ORDER_FILE_FLAG)
 
-if(LINKER_HAS_ORDER_FILE_FLAG)
+if(LINKER_HAS_ORDER_FILE_FLAG AND CLANG_ORDER_FILE)
   target_link_libraries(clang "-Wl,-order_file,${CLANG_ORDER_FILE}")
   set_target_properties(clang PROPERTIES LINK_DEPENDS ${CLANG_ORDER_FILE})
 endif()