Fixed linking on things that need -ldl, and compiler warnings.

Makefile

@@ -376,6 +376,7 @@ ifneq (,$(findstring "$(PLATFORM)", "linux" "gnu_kfreebsd" "kfreebsd-gnu" "gnu")
 
   THREAD_LIBS=-lpthread
   LIBS=-ldl -lm
+  AUTOUPDATER_LIBS += -ldl
 
   CLIENT_LIBS=$(SDL_LIBS)
   RENDERER_LIBS = $(SDL_LIBS) -lGL
@@ -834,6 +835,8 @@ ifeq ($(PLATFORM),irix64)
   SHLIBLDFLAGS=-shared
 
   LIBS=-ldl -lm -lgen
+  AUTOUPDATER_LIBS += -ldl
+
   # FIXME: The X libraries probably aren't necessary?
   CLIENT_LIBS=-L/usr/X11/$(LIB) $(SDL_LIBS) \
     -lX11 -lXext -lm
@@ -888,6 +891,7 @@ ifeq ($(PLATFORM),sunos)
 
   THREAD_LIBS=-lpthread
   LIBS=-lsocket -lnsl -ldl -lm
+  AUTOUPDATER_LIBS += -ldl
 
   BOTCFLAGS=-O0