is null.
* tm-sun4sol2.h (PROLOGUE_FIRSTLINE_OVERLAP): Remove -- it
causes problems in setting breakpoint in the right place in
functions with `float' args which are passed as doubles.
* xm-vaxbsd.h (MEM_FNS_DECLARED): Avoid erroneous redecl's.
* config/rs6000.mh (NATDEPFILES): Add corelow.o.