Only in patched: build
diff -ura orig/rviz-release-release-ardent-rviz_common-2.0.0-5/CMakeLists.txt patched/rviz-release-release-ardent-rviz_common-2.0.0-5/CMakeLists.txt
--- orig/rviz-release-release-ardent-rviz_common-2.0.0-5/CMakeLists.txt	2017-12-09 10:13:11.000000000 +0100
+++ patched/rviz-release-release-ardent-rviz_common-2.0.0-5/CMakeLists.txt	2017-12-21 22:55:41.276995739 +0100
@@ -17,13 +17,13 @@
 endif()
 
 if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-  add_compile_options(-Wall -Wextra -Wpedantic -Werror)
   # TODO(wjwwood): try to remove this -- currently needed to pass on CI
   include(CheckCXXCompilerFlag)
   check_cxx_compiler_flag(-Wno-gnu-zero-variadic-macro-arguments HAS_W_FLAG)
   if(HAS_W_FLAG)
     add_compile_options(-Wno-gnu-zero-variadic-macro-arguments)
   endif()
+  add_compile_options(-Wall -Wextra -Wpedantic -Werror)
 endif()
 
 find_package(ament_cmake REQUIRED)