+
+## ---------------- ##
+## Updating files. ##
+## ---------------- ##
+
+WGET = wget
+ftp-gnu = ftp://ftp.gnu.org/gnu
+
+# Use mv, if you don't have/want move-if-change.
+move_if_change ?= move-if-change
+
+
+# --------------------- #
+# Updating everything. #
+# --------------------- #
+
+.PHONY: update
+update: wget-update cvs-update po-update
+
+
+# ------------------- #
+# Updating PO files. #
+# ------------------- #
+
+po_repo = http://www.iro.umontreal.ca/contrib/po/maint/$(PACKAGE)
+.PHONY: do-po-update po-update
+do-po-update:
+ tmppo=/tmp/$(PACKAGE)-$(VERSION)-po &&\
+ rm -rf $$tmppo && \
+ mkdir $$tmppo && \
+ (cd $$tmppo && $(WGET) -r -l1 -nd --no-parent -A '*.po' $(po_repo)) &&\
+ cp $$tmppo/*.po po
+ cd po && $(MAKE) update-po
+ $(MAKE) po-check
+
+po-update:
+ if test -d "po"; then \
+ $(MAKE) do-po-update; \
+ fi
+
+# -------------------------- #
+# Updating GNU build tools. #
+# -------------------------- #
+
+# The following pseudo table associates a local directory and a URL
+# with each of the files that belongs to some other package and is
+# regularly updated from the specified URL.
+wget_files ?= $(srcdir)/config/config.guess \
+ $(srcdir)/config/config.sub \
+ $(srcdir)/src/ansi2knr.c \
+ $(srcdir)/config/texinfo.tex
+get-targets = $(patsubst %, get-%, $(wget_files))
+
+config.guess-url_prefix = $(ftp-gnu)/config/
+config.sub-url_prefix = $(ftp-gnu)/config/
+
+ansi2knr.c-url_prefix = ftp://ftp.cs.wisc.edu/ghost/
+
+texinfo.tex-url_prefix = $(ftp-gnu)/texinfo/
+
+standards.texi-url_prefix = $(ftp-gnu)/GNUinfo/
+make-stds.texi-url_prefix = $(ftp-gnu)/GNUinfo/
+
+target = $(patsubst get-%, %, $@)
+url = $($(notdir $(target))-url_prefix)$(notdir $(target))
+
+.PHONY: $(get-targets)
+$(get-targets):
+ $(WGET) $(url) -O $(target).t \
+ && $(move_if_change) $(target).t $(target)
+
+cvs_files ?= $(srcdir)/config/depcomp $(srcdir)/config/missing $(srcdir)/config/mkinstalldirs \
+ $(srcdir)/config/install-sh $(srcdir)/src/ansi2knr.c
+automake_repo=:pserver:anoncvs:anoncvs@sources.redhat.com:/cvs/automake
+.PHONY: wget-update
+wget-update: $(get-targets)
+
+.PHONY: cvs-update
+cvs-update:
+ for f in $(cvs_files); do \
+ test -f $$f || { echo "*** skipping $$f" 1>&2; continue; }; \
+ file=$$(basename $$f); \
+ echo checking out $$file...; \
+ $(CVS) -d $(automake_repo) co -p automake/lib/$$file> $$f.t \
+ && $(move_if_change) $$f.t $$f; \
+ done
+