[CMake] Re-enable -Wno-gnu-anonymous-struct & -Wno-nested-anon-types.

We're checking for support but we're discarding the result. My best
guess is that these warnings were disabled in the past. However, I don't
see a reason to keep it that way.

diff --git a/lldb/cmake/modules/LLDBConfig.cmake b/lldb/cmake/modules/LLDBConfig.cmake
index 2a709f8..5e45eb5 100644 (file)
--- a/lldb/cmake/modules/LLDBConfig.cmake
+++ b/lldb/cmake/modules/LLDBConfig.cmake
@@ -365,9 +365,15 @@ endif ()
 
 check_cxx_compiler_flag("-Wno-gnu-anonymous-struct"
                         CXX_SUPPORTS_NO_GNU_ANONYMOUS_STRUCT)
+if (CXX_SUPPORTS_NO_GNU_ANONYMOUS_STRUCT)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-gnu-anonymous-struct")
+endif ()
 
 check_cxx_compiler_flag("-Wno-nested-anon-types"
                         CXX_SUPPORTS_NO_NESTED_ANON_TYPES)
+if (CXX_SUPPORTS_NO_NESTED_ANON_TYPES)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-nested-anon-types")
+endif ()
 
 # Disable MSVC warnings
 if( MSVC )