parent objdirs.
* extra-lib.mk (object-suffixes-$(lib)): New variable, produced by
filtering out $($(lib)-inhibit-o); use that instead of
$(object-suffixes) in all the other variables.
* sunrpc/Makefile (install-lib): Variable removed.
(rpcsvc-objs): Variable removed.
(extra-objs): Don't include $(rpcsvc-objs).
(extra-libs): New variable, contains librpcsvc.
(librpcsvc-routines): New variable.
(librpcsvc-inhibit-o): New variable, contains .so.
(omit-deps): Set this to $(librpcsvc-routines).
($(objpfx)rpcgen): Don't use $(libc.a).
(lib, $(objpfx)librpcsvc.a): Targets removed.
* o-iterator.mk, extra-lib.mk: New files.
* Makerules (o-iterator): New variable.
[extra-libs]: Include extra-lib.mk to generate rules for each word
of $(extra-libs).
* Makefile (distribute): Add extra-lib.mk, o-iterator.mk.
(IMPLICIT_ONE, *_MAX_10_EXP_LOG): Macros removed; no longer needed.
* stdio/fpioconst.c, stdio/fpioconst.h: Don't use
LDBL_MAX_10_EXP_LOG; LAST_POW10 defines the maximal available
exponent.
