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diff --git a/mach/Machrules b/mach/Machrules
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+# Rules for MiG interfaces that want to go into the C library.
+
+# Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Library General Public License
+# as published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Library General Public License for more details.
+
+# You should have received a copy of the GNU Library General Public
+# License along with the GNU C Library; see the file COPYING.LIB.  If
+# not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+# Cambridge, MA 02139, USA.
+
+# Makefiles may define these variable before including this file:
+#	user-interfaces		Names of interfaces to put user stubs in for.
+#	server-interfaces	Names of interfaces to put server stubs in for.
+#	interface-library	Name of interface library to build and install.
+# This file sets:
+#	interface-headers	Names of generated interface header files.
+#	interface-routines	Names of generated interface routines.
+# All user stubs are put in individual files, prefixed with RPC_; header
+# for both __ and non-__ names is put in foo.h.  Server interfaces are
+# written to foo_server.c and foo_server.h; the server functions are called
+# _S_rpcname.
+
+# Includers can also add to or modify `migdefines' to set MiG flags.
+
+all:
+
+# Make sure no value comes from the environment, since we append to it.
+# This is done also in ../Rules, but we append to the value before
+# including Rules, which changes the origin.
+ifneq	"$(findstring env,$(origin generated))" ""
+generated :=
+endif
+
+
+include ../Makeconfig
+
+ifndef MIG
+MIG = mig
+endif
+MIGFLAGS = -DMACH_IPC_COMPAT=0 -DSTANDALONE -DTypeCheck=0 \
+	   $(+includes) $(migdefines) -subrprefix __
+
+.SUFFIXES: .defs	# Just to set specified_rule_matched.
+
+define nl	# This is needed by *.ir.
+
+
+endef
+ifdef user-interfaces
+*.ir := $(addprefix $(objpfx),$(foreach if,$(user-interfaces),$(if).ir))
+ifndef inhibit_interface_rules
+include $(*.ir)
+endif
+ifneq "$(*.ir)" "$(wildcard $(*.ir))"
+# If any .ir file is missing, we will be unable to make all the deps.
+no_deps=t
+endif
+generated += $(*.ir:$(objpfx)%=%)
+endif
+
+
+# %.ir defines a variable `%-calls', which lists the RPCs defined by
+# %.defs, and a rule to build $(%-calls:%=RPC_$(%-userprefix)%.c) from
+# %.defs, where $(%-userprefix) is the user prefix given in %.defs.  We use
+# the kludgificacious method of defining a pattern rule to build files
+# matching patterns we are pretty damn sure will only match the particular
+# files we have in mind.  To be so damn sure, we use the silly names
+# RPC_*.c and the pattern R%C_*.c because using __*.c and _%*.c (or any
+# other useful pattern) causes the rule for `host_info' to also match
+# `xxx_host_info', and analogous lossage.
+#
+# While we're at it, we figure out the imports used by %.defs and give them
+# as dependencies of the object files for the generated RPC_*.c files.
+#
+# Depend on %.h just so they will be built from %.uh in the
+# makefile-rebuilding run which builds %.ir; otherwise, %.uh is built as an
+# intermediate in order to make %.ir and then removed before re-exec, when
+# %.uh is built all over again to build %.h.
+$(objpfx)%.ir: $(objpfx)%.uh $(objpfx)%.h
+	(awk "NF == 4 && (\$$2 == \"Routine\" || \$$2 == \"SimpleRoutine\")\
+	        { printf \"$*-calls += %s\\n\", \$$3 }	\
+	      /^#include/ { printf \"$*-imports += %s\\n\", \$$2 }" $<	;\
+	 echo '$$($*-calls:%=$$(objpfx)R\%C_%.c): $$(objpfx)$*.ustamp ;';\
+	 echo '$$($*-calls:%=$$(objpfx)RPC_%.o): $$($*-imports:<%>=%)'	;\
+	) > $@-new
+	mv $@-new $@
+vpath Machrules ../mach	# Find ourselves.
+
+ifndef transform-user-stub-output
+transform-user-stub-output = tmp
+define transform-user-stub
+echo "weak_alias (__$$call, $$call)" >> $(objpfx)tmp_$${call}.c;
+endef
+endif
+
+# Not an implicit rule so the stamps are never removed as intermediates!
+$(patsubst %,$(objpfx)%.ustamp,$(user-interfaces)): $(objpfx)%.ustamp: %.defs
+	$(MIG) $< $(MIGFLAGS) $(user-MIGFLAGS) \
+	       -prefix __ -i $(objpfx)tmp_ \
+	       -server /dev/null -user /dev/null -header /dev/null
+	for call in $($*-calls); do \
+	  $(transform-user-stub) \
+	  ../move-if-change $(objpfx)$(transform-user-stub-output)_$${call}.c \
+			    $(objpfx)RPC_$${call}.c; \
+	done
+	touch $@
+
+# Look for the server stub files where they will be written.
+vpath %_server.c $(addprefix $(objpfx),$(sort $(dir $(server-interfaces))))
+
+# Build the server stubs in $(objdir).
+$(objpfx)%_server.c $(objpfx)%_server.h: %.defs
+	$(MIG) $< $(MIGFLAGS) $(server-MIGFLAGS) \
+	       -prefix _S_ \
+	       -user /dev/null -header /dev/null \
+	       -server $(@:.h=.c) -sheader $(@:.c=.h)
+
+# To get header files that declare both the straight and __ functions,
+# we generate two files and paste them together.
+$(objpfx)%.uh: %.defs; $(mig.uh)
+define mig.uh
+$(make-target-directory)
+$(MIG) $< $(MIGFLAGS) \
+       -header $@ -server /dev/null -user /dev/null
+endef
+$(objpfx)%.__h: %.defs; $(mig.__h)
+define mig.__h
+$(make-target-directory)
+$(MIG) $< $(MIGFLAGS) -prefix __ \
+       -header $@ -server /dev/null -user /dev/null
+endef
+
+$(objpfx)%.h: $(objpfx)%.__h $(objpfx)%.uh
+# The last line of foo.__h is "#endif _foo_user_".
+# The first two lines of foo.uh are "#ifndef _foo_user_"/"#define _foo_user_".
+	(sed -e '$$d' $<; sed -e '1,2d' $(word 2,$^)) > $@-new
+	mv $@-new $@
+
+interface-routines := $(foreach if,$(user-interfaces),			\
+				$(addprefix RPC_,$($(if)-calls)))	\
+		      $(server-interfaces:%=%_server)
+interface-headers := $(user-interfaces:%=%.h) \
+		     $(server-interfaces:%=%_server.h)
+
+# Remove the generated user stub source and header files,
+# and don't distribute them.
+mach-generated = $(interface-routines:%=%.c) \
+		 $(foreach h,$(interface-headers:%.h=%),$h.h $h.uh $h.__h)
+generated += $(mach-generated)
+
+# These are needed to generate the dependencies.
+before-compile += $(interface-headers:%=$(objpfx)%)
+
+# Don't let these be intermediate files and get removed.
+$(foreach h,$(interface-headers:%.h=$(objpfx)%),$h.h $h.__h $h.uh) :
+$(interface-routines:%=$(objpfx)%.c) :
+
+# Convenient target to generate all the headers.
+.PHONY: interface-headers
+interface-headers: $(interface-headers)
+
+# Don't automatically generate dependencies for the sources we generate.
+# There are likely to be a whole lot of them, and we know their
+# dependencies ahead of time anyway because they're boilerplate.
+omit-deps += $(interface-routines)
+
+# Specify the static dependencies of the generated files.
+$(foreach if,$(user-interfaces),$($(if)-calls:%=$(objpfx)RPC_%.o))): \
+    mach/boolean.h mach/kern_return.h mach/message.h mach/notify.h \
+    mach/mach_types.h mach/mig_errors.h mach/mig_support.h mach/msg_type.h \
+    $(..)libc-symbols.h $(objpfx)config.h
+$(server-interfaces:%=$(objpfx)%.o): \
+    mach/boolean.h mach/kern_return.h mach/message.h mach/mig_errors.h \
+    mach/mig_support.h mach/std_types.h
+# The MiG-generated sources also depend on the imports in their .defs files.
+# These dependencies are generated into the .ir files above.
+
+# If defined, $(interface-library) is `libNAME.a'.  It is to be a library
+# containing all the MiG-generated functions for the specified interfaces.
+
+ifdef interface-library
+
+$(interface-library)-objs := $(interface-routines:%=%.o)
+
+install-lib += $(interface-library)
+extra-objs += $($(interface-library)-objs)
+
+$(objpfx)$(interface-library): $(addprefix $(objpfx),\
+					   $($(interface-library)-objs))
+ifdef objdir
+	cd $(objdir); $(AR) cru$(verbose) $(@:$(objpfx)%=%) $(^:$(objpfx)%=%)
+else
+	$(AR) cru$(verbose) $@ $^
+endif
+	$(RANLIB) $@
+
+lib-noranlib: $(objpfx)$(interface-library)
+
+mostlyclean:
+	-rm -f $(objpfx)$(interface-library)
+
+endif