Index: compiler-rt/trunk/cmake/Modules/CompilerRTUtils.cmake
===================================================================
--- compiler-rt/trunk/cmake/Modules/CompilerRTUtils.cmake
+++ compiler-rt/trunk/cmake/Modules/CompilerRTUtils.cmake
@@ -233,7 +233,8 @@
     execute_process(
       COMMAND ${LLVM_CONFIG_PATH} "--ldflags" "--libs" "xray"
       RESULT_VARIABLE HAD_ERROR
-      OUTPUT_VARIABLE CONFIG_OUTPUT)
+      OUTPUT_VARIABLE CONFIG_OUTPUT
+      ERROR_QUIET)
     if (HAD_ERROR)
       message(WARNING "llvm-config finding xray failed with status ${HAD_ERROR}")
       set(COMPILER_RT_HAS_LLVMXRAY FALSE)
@@ -250,7 +251,8 @@
     execute_process(
       COMMAND ${LLVM_CONFIG_PATH} "--ldflags" "--libs" "testingsupport"
       RESULT_VARIABLE HAD_ERROR
-      OUTPUT_VARIABLE CONFIG_OUTPUT)
+      OUTPUT_VARIABLE CONFIG_OUTPUT
+      ERROR_QUIET)
     if (HAD_ERROR)
       message(WARNING "llvm-config finding testingsupport failed with status ${HAD_ERROR}")
     else()