It's not necessarily obvious so better suggest it there to use the same
build options, and indicate the tradeoffs (e.g. depend on more libs).
make dev/haring/haring
+If HAProxy is built with special options such -DDEBUG_THREAD or with
+multi-threading support enabled (which changes the ring's header size),
+it can be worth reusing the same build options for haring, usually they
+will remain compatible, and will simplify the handling of different file
+layouts, at the expense of dragging more dependencies into the executable.