[flang] Fix for 541f5c4a6db35870091dd15dfa09dde751229a17 (D140524) breaking out-of...

diff --git a/flang/CMakeLists.txt b/flang/CMakeLists.txt
index 4c0b9a8..ac30da8 100644 (file)
--- a/flang/CMakeLists.txt
+++ b/flang/CMakeLists.txt
@@ -62,6 +62,7 @@ endif()
 
 if (FLANG_STANDALONE_BUILD)
   set(FLANG_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
+  set(CMAKE_INCLUDE_CURRENT_DIR ON)
   if (NOT MSVC_IDE)
     set(LLVM_ENABLE_ASSERTIONS ${ENABLE_ASSERTIONS}
       CACHE BOOL "Enable assertions")