Index: mlir/CMakeLists.txt
===================================================================
--- mlir/CMakeLists.txt
+++ mlir/CMakeLists.txt
@@ -1,7 +1,7 @@
 # MLIR project.
 set(MLIR_MAIN_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/include ) # --src-root
 set(MLIR_INCLUDE_DIR ${CMAKE_CURRENT_BINARY_DIR}/include ) # --includedir
-set(MLIR_TABLEGEN_EXE mlir-tblgen)
+set(MLIR_TABLEGEN_EXE mlir-tblgen CACHE STRING "")
 
 set(MLIR_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 set(MLIR_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})