https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64767
--- Comment #2 from Ulf Magnusson <ulfalizer at gmail dot com> --- Looks like -Wnon-literal-null-conversion is intended to warn for the comparison case too, though it doesn't seem to be implemented yet as of clang 3.4: http://llvm.org/klaus/clang/commit/50800fc551ac6b8a95cca662223e7f061bbd169a/
