There's also this, in sensors-applet/Makefile.am:
-LIBS = $(GLIB_LIBS) $(GTK_LIBS) $(GNOME_LIBS) $(CAIRO_LIBS) $(LIBNOTIFY_LIBS) +LIBS = -ldl $(GLIB_LIBS) $(GTK_LIBS) $(GNOME_LIBS) $(CAIRO_LIBS) $(LIBNOTIFY_LIBS)
Not sure how / if that's related. But looking over a debdiff from sensors-applet_3.0.0-0.2.dsc to sensors-applet_2.2.7-2ubuntu2.dsc, I think these three chunks are all that was changed in the debian version.
There's also this, in sensors- applet/ Makefile. am:
-LIBS = $(GLIB_LIBS) $(GTK_LIBS) $(GNOME_LIBS) $(CAIRO_LIBS) $(LIBNOTIFY_LIBS)
+LIBS = -ldl $(GLIB_LIBS) $(GTK_LIBS) $(GNOME_LIBS) $(CAIRO_LIBS) $(LIBNOTIFY_LIBS)
Not sure how / if that's related. But looking over a debdiff from sensors- applet_ 3.0.0-0. 2.dsc to sensors- applet_ 2.2.7-2ubuntu2. dsc, I think these three chunks are all that was changed in the debian version.