Index: lldb/cmake/modules/LLDBConfig.cmake
===================================================================
--- lldb/cmake/modules/LLDBConfig.cmake
+++ lldb/cmake/modules/LLDBConfig.cmake
@@ -278,6 +278,9 @@
 check_cxx_compiler_flag("-Wno-nested-anon-types"
                         CXX_SUPPORTS_NO_NESTED_ANON_TYPES)
 
+check_cxx_compiler_flag("-Wno-format-zero-length"
+                        CXX_SUPPORTS_NO_FORMAT_ZERO_LENGTH)
+
 # Disable MSVC warnings
 if( MSVC )
   add_definitions(
Index: lldb/unittests/Utility/CMakeLists.txt
===================================================================
--- lldb/unittests/Utility/CMakeLists.txt
+++ lldb/unittests/Utility/CMakeLists.txt
@@ -1,3 +1,7 @@
+if(CXX_SUPPORTS_NO_FORMAT_ZERO_LENGTH)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-format-zero-length")
+endif()
+
 add_lldb_unittest(UtilityTests
   AnsiTerminalTest.cpp
   ArgsTest.cpp