diff --git a/llvm/cmake/modules/GetErrcMessages.cmake b/llvm/cmake/modules/GetErrcMessages.cmake
--- a/llvm/cmake/modules/GetErrcMessages.cmake
+++ b/llvm/cmake/modules/GetErrcMessages.cmake
@@ -29,6 +29,9 @@
         }
     ")
 
+    # try_run uses Debug build by default. Set it to LLVM project's build type.
+    set(CMAKE_TRY_COMPILE_CONFIGURATION ${CMAKE_BUILD_TYPE})
+
     try_run(errc_exit_code
             errc_compiled
             ${CMAKE_BINARY_DIR}