diff --git a/ap/libc/glibc/glibc-2.23/Rules b/ap/libc/glibc/glibc-2.23/Rules
new file mode 100644
index 0000000..d8093b3
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/Rules
@@ -0,0 +1,246 @@
+# Copyright (C) 1991-2016 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 Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 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
+# Lesser General Public License for more details.
+
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <http://www.gnu.org/licenses/>.
+
+#
+#	Rules for making a subdirectory in the GNU C library.
+#	Each subdirectory Makefile defines some variables and includes this.
+#
+ifneq (,)
+This makefile requires GNU Make.
+endif
+
+all: # Don't let the default goal come from Makeconfig.
+
+include $(firstword $(..) ../)Makeconfig
+
+ifndef	subdir
+Each subdirectory makefile must define the `subdir' variable.
+endif
+# This ` unconfuses emacs.
+# This is benign and useless in GNU make before 3.63.
+export subdir := $(subdir)
+
+# This is the default target; it makes the library and auxiliary programs.
+.PHONY: all
+all: objs lib others
+
+ifeq ($(build-programs),yes)
+others: $(addprefix $(objpfx),$(extra-objs) \
+			      $(install-lib) \
+			      $(install-bin) $(install-bin-script) \
+			      $(install-rootsbin) $(install-sbin))
+else
+others: $(addprefix $(objpfx),$(extra-objs) \
+			      $(install-lib))
+endif
+
+ifneq	"$(findstring env,$(origin headers))" ""
+headers :=
+endif
+
+ifneq	"$(findstring env,$(origin generated))" ""
+generated :=
+endif
+
+ifneq	"$(findstring env,$(origin common-generated))" ""
+common-generated :=
+endif
+
+# See below.  This must be set before Makerules processes it.
+before-compile += $(common-objpfx)bits/stdio_lim.h
+
+include $(..)Makerules
+
+.PHONY: subdir_lib
+subdir_lib: lib-noranlib
+
+# Some subdirs need to install a dummy library.
+# They can use "$(objpfx)libfnord.a: $(dep-dummy-lib); $(make-dummy-lib)".
+dep-dummy-lib = $(common-objpfx)dummy.o
+define make-dummy-lib
+$(AR) cr$(verbose) $@ $<
+endef
+
+$(common-objpfx)dummy.c:
+	rm -f $@
+	(echo 'extern void __dummy__ (void);'; \
+	 echo 'void __dummy__ (void) { }') > $@
+common-generated += dummy.o dummy.c
+
+# This makes all the auxiliary and test programs.
+
+.PHONY: others tests bench
+
+ifeq ($(build-programs),yes)
+others: $(addprefix $(objpfx),$(others) $(sysdep-others) $(extra-objs))
+else
+others: $(addprefix $(objpfx),$(extra-objs))
+endif
+ifeq ($(run-built-tests),no)
+tests: $(addprefix $(objpfx),$(tests) $(test-srcs)) $(tests-special)
+xtests: tests $(xtests-special)
+else
+tests: $(tests:%=$(objpfx)%.out) $(tests-special)
+xtests: tests $(xtests:%=$(objpfx)%.out) $(xtests-special)
+endif
+
+tests-special-notdir = $(patsubst $(objpfx)%, %, $(tests-special))
+xtests-special-notdir = $(patsubst $(objpfx)%, %, $(xtests-special))
+tests:
+	$(..)scripts/merge-test-results.sh -s $(objpfx) $(subdir) \
+	  $(sort $(tests) $(tests-special-notdir:.out=)) \
+	  > $(objpfx)subdir-tests.sum
+xtests:
+	$(..)scripts/merge-test-results.sh -s $(objpfx) $(subdir) \
+	  $(sort $(xtests) $(xtests-special-notdir:.out=)) \
+	  > $(objpfx)subdir-xtests.sum
+
+ifeq ($(build-programs),yes)
+binaries-all-notests = $(others) $(sysdep-others)
+binaries-all-tests = $(tests) $(xtests) $(test-srcs)
+binaries-all = $(binaries-all-notests) $(binaries-all-tests)
+binaries-static-notests = $(others-static)
+binaries-static-tests = $(tests-static) $(xtests-static)
+binaries-static = $(binaries-static-notests) $(binaries-static-tests)
+ifeq (yesyes,$(have-fpie)$(build-shared))
+binaries-pie-tests = $(tests-pie) $(xtests-pie)
+binaries-pie-notests = $(others-pie)
+else
+binaries-pie-tests =
+binaries-pie-notests =
+endif
+else
+binaries-all-notests =
+binaries-all-tests = $(tests) $(xtests) $(test-srcs)
+binaries-all = $(binaries-all-tests)
+binaries-static-notests =
+binaries-static-tests =
+binaries-static =
+binaries-pie-tests =
+binaries-pie-notests =
+endif
+
+binaries-pie = $(binaries-pie-tests) $(binaries-pie-notests)
+binaries-shared-tests = $(filter-out $(binaries-pie) $(binaries-static), \
+				     $(binaries-all-tests))
+binaries-shared-notests = $(filter-out $(binaries-pie) $(binaries-static), \
+				       $(binaries-all-notests))
+
+ifneq "$(strip $(binaries-shared-notests))" ""
+$(addprefix $(objpfx),$(binaries-shared-notests)): %: %.o \
+  $(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
+  $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
+	$(+link)
+endif
+
+ifneq "$(strip $(binaries-shared-tests))" ""
+$(addprefix $(objpfx),$(binaries-shared-tests)): %: %.o \
+  $(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
+  $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
+	$(+link-tests)
+endif
+
+ifneq "$(strip $(binaries-pie-tests))" ""
+$(addprefix $(objpfx),$(binaries-pie-tests)): %: %.o \
+  $(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
+  $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
+	$(+link-pie-tests)
+endif
+
+ifneq "$(strip $(binaries-pie-notests))" ""
+$(addprefix $(objpfx),$(binaries-pie-notests)): %: %.o \
+  $(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
+  $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
+	$(+link-pie)
+endif
+
+ifneq "$(strip $(binaries-static-notests))" ""
+$(addprefix $(objpfx),$(binaries-static-notests)): %: %.o \
+  $(sort $(filter $(common-objpfx)lib%,$(link-libc-static))) \
+  $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
+	$(+link-static)
+endif
+
+ifneq "$(strip $(binaries-static-tests))" ""
+$(addprefix $(objpfx),$(binaries-static-tests)): %: %.o \
+  $(sort $(filter $(common-objpfx)lib%,$(link-libc-static-tests))) \
+  $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
+	$(+link-static-tests)
+endif
+
+ifneq "$(strip $(tests) $(xtests) $(test-srcs))" ""
+# These are the implicit rules for making test outputs
+# from the test programs and whatever input files are present.
+
+define make-test-out
+$(if $($*-ENV-only),$(test-wrapper-env-only) $($*-ENV-only),\
+     $(test-wrapper-env) $(run-program-env) $($*-ENV)) \
+$(host-test-program-cmd) $($*-ARGS)
+endef
+$(objpfx)%.out: %.input $(objpfx)%
+	$(make-test-out) > $@ < $(word 1,$^); \
+	$(evaluate-test)
+$(objpfx)%.out: /dev/null $(objpfx)%	# Make it 2nd arg for canned sequence.
+	$(make-test-out) > $@; \
+	$(evaluate-test)
+
+# tests-unsupported lists tests that we will not try to build at all in
+# this configuration.  Note this runs every time because it does not
+# actually create its target.  The dependency on Makefile is meant to
+# ensure that it runs after a Makefile change to add a test to the list
+# when it previously ran and produced a .out file (probably for a failure).
+ifneq "$(strip $(tests-unsupported))" ""
+$(tests-unsupported:%=$(objpfx)%.out): $(objpfx)%.out: Makefile
+	@rm -f $@
+	$(..)scripts/evaluate-test.sh $(patsubst $(common-objpfx)%.out,%,$@) \
+				      77 false false > $(@:.out=.test-result)
+endif
+
+endif	# tests
+
+
+.PHONY: distclean realclean subdir_distclean subdir_realclean \
+	subdir_clean subdir_mostlyclean subdir_testclean
+subdir_mostlyclean: mostlyclean
+subdir_clean: clean
+subdir_distclean: distclean
+subdir_realclean: realclean
+subdir_testclean: do-tests-clean
+realclean: distclean
+distclean: clean
+
+# We want to install everything except the library itself, but update all
+# our portions of the library because the parent make will install it later
+# (likewise the stubs file).
+.PHONY: subdir_install
+subdir_install: install-no-libc.a lib-noranlib stubs
+
+.PHONY: subdir_objs subdir_stubs
+subdir_objs: objs
+subdir_stubs: stubs
+
+# Target required by the Hurd to ensure that all the MiG-generated
+# headers are in place before building a subdirectory.
+.PHONY: before-compile
+before-compile: $(before-compile)
+
+$(common-objpfx)dummy.o: $(common-objpfx)dummy.c $(before-compile);
+	$(compile-command.c)
+
+# Local Variables:
+# mode: makefile
+# End: