Makefile.maint - platform/external/bison - Git at Google

 # -*-Makefile-*-
 # This Makefile fragment is shared between the coreutils,
 # CPPI, Bison, and Autoconf.

 ## Copyright (C) 2001-2006 Free Software Foundation, Inc.
 ##
 ## This program is free software; you can redistribute it and/or modify
 ## it under the terms of the GNU General Public License as published by
 ## the Free Software Foundation; either version 2, or (at your option)
 ## any later version.
 ##
 ## This program 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 General Public License for more details.
 ##
 ## You should have received a copy of the GNU General Public License
 ## along with this program; if not, write to the Free Software
 ## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 ## 02110-1301, USA.

 # This is reported not to work with make-3.79.1
 # ME := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
 ME := Makefile.maint

 # Do not save the original name or timestamp in the .tar.gz file.
 # Use --rsyncable if available.
 gzip_rsyncable = \
   (gzip --help|grep rsyncable) >/dev/null 2>&1 && echo --rsyncable
 GZIP_ENV = "--no-name --best `$(gzip_rsyncable)`"

 CVS = cvs

 # cvsu is part of the cvsutils package: http://www.red-bean.com/cvsutils/
 CVS_LIST = sh -c ' \
     if test -x $(srcdir)/build-aux/cvsu; then \
       $(srcdir)/build-aux/cvsu --find --types=AFGM $$*; \
     else \
       awk -F/ '\''{ \
 	  if (!$$1 && $$3 !~ /^-/) { \
 	    f=FILENAME; \
 	    sub(/CVS\/Entries/, "", f); \
 	    print f $$2; \
 	  }}'\'' \
 	$$(find $${*-*} -name Entries -print) /dev/null; \
     fi \
   ' dummy

 CVS_LIST_EXCEPT = \
   $(CVS_LIST) | if test -f .x-$@; then grep -vEf .x-$@; else grep -v ChangeLog; fi

 ifeq ($(origin prev_version_file), undefined)
   prev_version_file = .prev-version
 endif

 PREV_VERSION := $(shell cat $(prev_version_file))
 VERSION_REGEXP = $(subst .,\.,$(VERSION))

 tag-package = $(shell echo "$(PACKAGE)" | tr '[:lower:]' '[:upper:]')
 tag-this-version = $(subst .,_,$(VERSION))
 this-cvs-tag = $(tag-package)-$(tag-this-version)
 my_distdir = $(PACKAGE)-$(VERSION)

 # Old releases are stored here.
 # Used for diffs and xdeltas.
 release_archive_dir ?= ../release

 # Prevent programs like 'sort' from considering distinct strings to be equal.
 # Doing it here saves us from having to set LC_ALL elsewhere in this file.
 export LC_ALL = C


 ## --------------- ##
 ## Sanity checks.  ##
 ## --------------- ##

 # FIXME: add a check to prohibit definition in src/*.c of symbols defined
 # in system.h.  E.g. today I removed from tail.c a useless definition of
 # ENOSYS.  It was useless because system.h ensures it's defined.

 # Checks that don't require cvs.
 # Run `changelog-check' last, as previous test may reveal problems requiring
 # new ChangeLog entries.
 local-checks-available = \
   po-check copyright-check writable-files m4-check author_mark_check \
   changelog-check strftime-check $(syntax-check-rules) \
   makefile_path_separator_check \
   makefile-check
 .PHONY: $(local-checks-available)

 local-check = $(filter-out $(local-checks-to-skip), $(local-checks-available))

 .PHONY: $(syntax-check-rules)
 syntax-check-rules = \
   sc_cast_of_argument_to_free \
   sc_cast_of_x_alloc_return_value \
   sc_cast_of_alloca_return_value \
   sc_changelog \
   sc_dd_max_sym_length \
   sc_error_exit_success \
   sc_file_system \
   sc_no_if_have_config_h \
   sc_obsolete_symbols \
   sc_prohibit_atoi_atof \
   sc_prohibit_jm_in_m4 \
   sc_prohibit_assert_without_use \
   sc_require_config_h \
   sc_root_tests \
   sc_space_tab \
   sc_sun_os_names \
   sc_system_h_headers \
   sc_tight_scope \
   sc_trailing_blank \
   sc_two_space_separator_in_usage \
   sc_unmarked_diagnostics \
   sc_useless_cpp_parens

 syntax-check: $(syntax-check-rules)
 #	@grep -nE '#  *include <(limits|std(def|arg|bool))\.h>'		\
 #	    $$(find -type f -name '*.[chly]') &&			\
 #	  { echo '$(ME): found conditional include' 1>&2;		\
 #	    exit 1; } || :

 #	grep -nE '^#  *include <(string|stdlib)\.h>'			\
 #	    $(srcdir)/{lib,src}/*.[chy] &&				\
 #	  { echo '$(ME): FIXME' 1>&2;					\
 #	    exit 1; } || :
 # FIXME: don't allow `#include .strings\.h' anywhere

 sc_cast_of_argument_to_free:
 	@grep -nE '\<free \(\(' $(srcdir)/{lib,src}/*.[chly] &&		\
 	  { echo '$(ME): don'\''t cast free argument' 1>&2;		\
 	    exit 1; } || :

 sc_cast_of_x_alloc_return_value:
 	@grep -nE --exclude=$(srcdir)/lib/regex.c			\
 	    '\*\) *x(m|c|re)alloc\>'					\
 	    $(srcdir)/{lib,src}/*.[chy] &&				\
 	  { echo '$(ME): don'\''t cast x*alloc return value' 1>&2;	\
 	    exit 1; } || :

 sc_cast_of_alloca_return_value:
 	@grep -nE '\*\) *alloca\>'					\
 	    $(srcdir)/src/*.[chy] &&					\
 	  { echo '$(ME): don'\''t cast alloca return value' 1>&2;	\
 	    exit 1; } || :

 sc_space_tab:
 	@grep -n '[ ]	' $$($(CVS_LIST_EXCEPT)) &&			\
 	  { echo '$(ME): found SPACE-TAB sequence; remove the SPACE'	\
 		1>&2; exit 1; } || :

 # Don't use the old ato* functions in `real' code.
 # They provide no error checking mechanism.
 # Instead, use strto* functions.
 sc_prohibit_atoi_atof:
 	@grep -nE '\<ato([filq]|ll)\>' $$($(CVS_LIST_EXCEPT)) &&	\
 	  { echo '$(ME): do not use ato''f, ato''i, ato''l, ato''ll, or ato''q'	\
 		1>&2; exit 1; } || :

 # Using EXIT_SUCCESS as the first argument to error is misleading,
 # since when that parameter is 0, error does not exit.  Use `0' instead.
 sc_error_exit_success:
 	@grep -nF 'error (EXIT_SUCCESS,'					\
 	    $$(find -type f -name '*.[chly]') &&			\
 	  { echo '$(ME): found error (EXIT_SUCCESS' 1>&2;		\
 	    exit 1; } || :

 sc_file_system:
 	@grep -ni 'file''system' $$($(CVS_LIST_EXCEPT)) &&		\
 	  { echo '$(ME): found use of "file''system";'			\
 	    'rewrite to use "file system"' 1>&2;			\
 	    exit 1; } || :

 sc_no_if_have_config_h:
 	@grep -n '^# *if HAVE_CONFIG_H' $$($(CVS_LIST_EXCEPT)) &&	\
 	  { echo '$(ME): found use of #if HAVE_CONFIG_H; use #ifdef'	\
 		1>&2; exit 1; } || :

 # Nearly all .c files must include <config.h>.
 sc_require_config_h:
 	@grep -L '^# *include <config\.h>'				\
 		$$($(CVS_LIST_EXCEPT) | grep '\.c$$')			\
 	    | grep . &&							\
 	  { echo '$(ME): the above files do not include <config.h>'	\
 		1>&2; exit 1; } || :

 # Prohibit the inclusion of assert.h without an actual use of assert.
 sc_prohibit_assert_without_use:
 	@files=$$(grep -l '# *include <assert\.h>'			\
 		    $$($(CVS_LIST_EXCEPT) | grep '\.c$$')) &&		\
 	grep -L '\<assert (' $$files					\
 	    | grep . &&							\
 	  { echo "$(ME): the above files include <assert.h> but don't use it" \
 		1>&2; exit 1; } || :

 sc_obsolete_symbols:
 	@grep -nE '\<(HAVE''_FCNTL_H|O''_NDELAY)\>'			\
 	     $$($(CVS_LIST_EXCEPT)) &&					\
 	  { echo '$(ME): do not use HAVE''_FCNTL_H or O''_NDELAY'	\
 		1>&2; exit 1; } || :

 # FIXME: warn about definitions of EXIT_FAILURE, EXIT_SUCCESS, STREQ

 # Each nonempty line must start with a year number, or a TAB.
 sc_changelog:
 	@grep -n '^[^12	]' $$(find . -maxdepth 2 -name ChangeLog) &&	\
 	  { echo '$(ME): found unexpected prefix in a ChangeLog' 1>&2;	\
 	    exit 1; } || :

 # Ensure that dd's definition of LONGEST_SYMBOL stays in sync
 # with the strings from the two affected variables.
 dd_c = $(srcdir)/src/dd.c
 sc_dd_max_sym_length:
 ifneq ($(wildcard $(dd_c)),)
 	@len=$$( (sed -n '/conversions\[\] =$$/,/^};/p' $(dd_c);\
 		 sed -n '/flags\[\] =$$/,/^};/p' $(dd_c) )	\
 		|sed -n '/"/s/^[^"]*"\([^"]*\)".*/\1/p'		\
 	      | wc --max-line-length);				\
 	max=$$(sed -n '/^#define LONGEST_SYMBOL /s///p' $(dd_c)	\
 	      |tr -d '"' | wc --max-line-length);		\
 	if test "$$len" = "$$max"; then :; else			\
 	  echo 'dd.c: LONGEST_SYMBOL is not longest' 1>&2;	\
 	  exit 1;						\
 	fi
 endif

 # Many m4 macros names once began with `jm_'.
 # On 2004-04-13, they were all changed to start with gl_ instead.
 # Make sure that none are inadvertently reintroduced.
 sc_prohibit_jm_in_m4:
 	@grep -nE 'jm_[A-Z]'						\
 		$$($(CVS_LIST) $(srcdir)/m4 |grep '\.m4$$') &&		\
 	    { echo '$(ME): do not use jm_ in m4 macro names'		\
 	      1>&2; exit 1; } || :

 sc_root_tests:
 	@t1=sc-root.expected; t2=sc-root.actual;			\
 	grep -nl '^PRIV_CHECK_ARG=require-root'				\
 	  $$($(CVS_LIST) tests) |sed s,tests,., |sort > $$t1;		\
 	sed -n 's,	cd \([^ ]*\) .*MAKE..check TESTS=\(.*\),./\1/\2,p' \
 	  $(srcdir)/tests/Makefile.am |sort > $$t2;			\
 	diff -u $$t1 $$t2 || diff=1;					\
 	rm -f $$t1 $$t2;						\
 	test "$$diff"							\
 	  && { echo 'tests/Makefile.am: missing check-root action'>&2;	\
 	       exit 1; } || :

 # Create a list of regular expressions matching the names
 # of files included from system.h.  Exclude a couple.
 .re-list:
 	@sed -n '/^# *include /s///p' $(srcdir)/src/system.h \
 	  | grep -Ev 'sys/(param|file)\.h' \
 	  | sed 's/ .*//;;s/^["<]/^# *include [<"]/;s/\.h[">]$$/\\.h[">]/' \
 	  > $@-t
 	@mv $@-t $@

 # Files in src/ should not include directly any of
 # the headers already included via system.h.
 sc_system_h_headers: .re-list
 	@if test -f $(srcdir)/src/system.h; then			\
 	  trap 'rc=$$?; rm -f .re-list; exit $$rc' 0 1 2 3 15;		\
 	  grep -nE -f .re-list						\
 	      $$($(CVS_LIST) src |					\
 		 grep -Ev '((copy|system)\.h|parse-gram\.c)$$')		\
 	    && { echo '$(ME): the above are already included via system.h'\
 		  1>&2;  exit 1; } || :;				\
 	fi

 sc_sun_os_names:
 	@grep -nEi \
 	    'solaris[^[:alnum:]]*2\.(7|8|9|[1-9][0-9])|sunos[^[:alnum:]][6-9]' \
 	    $$($(CVS_LIST_EXCEPT)) &&					\
 	  { echo '$(ME): found misuse of Sun OS version numbers' 1>&2;	\
 	    exit 1; } || :

 sc_tight_scope:
 	$(MAKE) -C src $@

 sc_trailing_blank:
 	@grep -n '[	 ]$$' $$($(CVS_LIST_EXCEPT)) &&			\
 	  { echo '$(ME): found trailing blank(s)'			\
 		1>&2; exit 1; } || :

 sc_two_space_separator_in_usage:
 	@grep -n '^   *--[a-z][0-9A-Za-z-]* [^ ].*\\$$'			\
 	    $$($(CVS_LIST_EXCEPT)) &&					\
 	  { echo "$(ME): help2man requires at least two spaces between"; \
 	    echo "$(ME): an option and its description"; \
 		1>&2; exit 1; } || :

 # Look for diagnostics that aren't marked for translation.
 # This won't find any for which error's format string is on a separate line.
 sc_unmarked_diagnostics:
 	@grep -nE							\
 	    '\<error \([^"]*"[^"]*[a-z]{3}' $$($(CVS_LIST_EXCEPT))	\
 	  | grep -v '_''(' &&						\
 	  { echo '$(ME): found unmarked diagnostic(s)' 1>&2;		\
 	    exit 1; } || :

 # Avoid useless parentheses like those in this example:
 # #if defined (SYMBOL) || defined (SYM2)
 sc_useless_cpp_parens:
 	@grep -n '^# *if .*defined *(' $$($(CVS_LIST_EXCEPT)) &&	\
 	  { echo '$(ME): found useless parentheses in cpp directive'	\
 		1>&2; exit 1; } || :

 # Ensure that date's --help output stays in sync with the info
 # documentation for GNU strftime.  The only exception is %N,
 # which date accepts but GNU strftime does not.
 extract_char = sed 's/^[^%][^%]*%\(.\).*/\1/'
 strftime-check:
 	if test -f $(srcdir)/src/date.c; then				\
 	  grep '^  %.  ' $(srcdir)/src/date.c | sort			\
 	    | $(extract_char) > $@-src;					\
 	  { echo N;							\
 	    info libc date calendar format | grep '^    `%.'\'		\
 	      | $(extract_char); } | sort > $@-info;			\
 	  diff -u $@-src $@-info || exit 1;				\
 	  rm -f $@-src $@-info;						\
 	fi

 # Ensure that we use only the standard $(VAR) notation,
 # not @...@ in Makefile.am, now that we can rely on automake
 # to emit a definition for each substituted variable.
 makefile-check:
 	grep -nE '@[A-Z_0-9]+@' `find . -name Makefile.am` \
 	  && { echo 'Makefile.maint: use $$(...), not @...@' 1>&2; exit 1; } || :

 news-date-check: NEWS
 	today=`date +%Y-%m-%d`;	\
 	if head NEWS | grep '^\*.* $(VERSION_REGEXP) ('$$today')' \
 	    >/dev/null; then \
 	  :; \
 	else \
 	  echo "version or today's date is not in NEWS" 1>&2; \
 	  exit 1; \
 	fi

 changelog-check:
 	if head ChangeLog | grep 'Version $(VERSION_REGEXP)\.$$' \
 	    >/dev/null; then \
 	  :; \
 	else \
 	  echo "$(VERSION) not in ChangeLog" 1>&2; \
 	  exit 1; \
 	fi

 m4-check:
 	@grep -n 'AC_DEFUN([^[]' m4/*.m4 \
 	  && { echo 'Makefile.maint: quote the first arg to AC_DEFUN' 1>&2; \
 	       exit 1; } || :

 # Verify that all source files using _() are listed in po/POTFILES.in.
 # FIXME: don't hard-code file names below; use a more general mechanism.
 po-check:
 	if test -f po/POTFILES.in; then					\
 	  grep -E -v '^(#|$$)' po/POTFILES.in				\
 	    | grep -v '^src/false\.c$$' | sort > $@-1;			\
 	  files=;							\
 	  for file in $$($(CVS_LIST_EXCEPT)) lib/*.[ch]; do		\
 	    case $$file in						\
 	    djgpp/* | man/*) continue;;					\
 	    esac;							\
 	    case $$file in						\
 	    *.[ch])							\
 	      base=`expr " $$file" : ' \(.*\)\..'`;			\
 	      { test -f $$base.l || test -f $$base.y; } && continue;;	\
 	    esac;							\
 	    files="$$files $$file";					\
 	  done;								\
 	  grep -E -l '\bN?_\([^)"]*("|$$)' $$files | sort -u > $@-2;	\
 	  diff -u $@-1 $@-2 || exit 1;					\
 	  rm -f $@-1 $@-2;						\
 	fi

 # In a definition of #define AUTHORS "... and ..." where the RHS contains
 # the English word `and', the string must be marked with `N_ (...)' so that
 # gettext recognizes it as a string requiring translation.
 author_mark_check:
 	@grep -n '^# *define AUTHORS "[^"]* and ' src/*.c |grep -v ' N_ (' && \
 	  { echo 'Makefile.maint: enclose the above strings in N_ (...)' 1>&2; \
 	    exit 1; } || :

 # Sometimes it is useful to change the PATH environment variable
 # in Makefiles.  When doing so, it's better not to use the Unix-centric
 # path separator of `:', but rather the automake-provided `@PATH_SEPARATOR@'.
 # It'd be better to use `find -print0 ...|xargs -0 ...', but less portable,
 # and there probably aren't many projects with so many Makefile.am files
 # that we'd have to worry about limits on command line length.
 msg = 'Makefile.maint: Do not use `:'\'' above; use @PATH_SEPARATOR@ instead'
 makefile_path_separator_check:
 	@grep -n 'PATH=.*:' `find $(srcdir) -name Makefile.am` \
 	  && { echo $(msg) 1>&2; exit 1; } || :

 # Check that `make alpha' will not fail at the end of the process.
 writable-files:
 	if test -d $(release_archive_dir); then :; else			\
 	  mkdir $(release_archive_dir);					\
 	fi
 	for file in $(distdir).tar.gz $(xd-delta)			\
 	            $(release_archive_dir)/$(distdir).tar.gz		\
 	            $(release_archive_dir)/$(xd-delta); do		\
 	  test -e $$file || continue;					\
 	  test -w $$file						\
 	    || { echo ERROR: $$file is not writable; fail=1; };		\
 	done;								\
 	test "$$fail" && exit 1 || :

 v_etc_file = lib/version-etc.c
 # Make sure that the copyright date in $(v_etc_file) is up to date.
 copyright-check:
 	@if test -f $(v_etc_file); then \
 	  grep 'enum { COPYRIGHT_YEAR = '$$(date +%Y)' };' $(v_etc_file) \
 	    >/dev/null \
 	  || { echo 'out of date copyright in $(v_etc_file); update it' 1>&2; \
 	       exit 1; }; \
 	fi


 # Sanity checks with the CVS repository.
 cvs-tag-check:
 	echo $(this-cvs-tag); \
 	if $(CVS) -n log -h README | grep -e $(this-cvs-tag): >/dev/null; then \
 	  echo "$(this-cvs-tag) as already been used; not tagging" 1>&2; \
 	  exit 1; \
 	else :; fi

 cvs-diff-check:
 	if $(CVS) diff >cvs-diffs; then				\
 	  rm cvs-diffs;						\
 	else							\
 	  echo "Some files are locally modified:" 1>&2;		\
 	  cat cvs-diffs;					\
 	  exit 1;						\
 	fi

 cvs-check: cvs-diff-check cvs-tag-check

 maintainer-distcheck: changelog-check
 	$(MAKE) distcheck
 	$(MAKE) my-distcheck


 # Tag before making distribution.  Also, don't make a distribution if
 # checks fail.  Also, make sure the NEWS file is up-to-date.
 # FIXME: use dist-hook/my-dist like distcheck-hook/my-distcheck.
 cvs-dist: $(local-check) cvs-check maintainer-distcheck
 	$(CVS) update po
 	$(CVS) tag -c $(this-cvs-tag)
 	$(MAKE) dist

 # Use this to make sure we don't run these programs when building
 # from a virgin tgz file, below.
 null_AM_MAKEFLAGS = \
   ACLOCAL=false \
   AUTOCONF=false \
   AUTOMAKE=false \
   AUTOHEADER=false \
   MAKEINFO=false

 # Detect format-string/arg-list mismatches that would normally be obscured
 # by the use of _().  The --disable-nls effectively defines away that macro,
 # and building with CFLAGS='-Wformat -Werror' causes any format warning to be
 # treated as a failure.  Also, check for shadowing problems with -Wshadow.
 # These CFLAGS are pretty strict.  If you build this target, you probably
 # have to have a recent version of gcc and glibc headers.
 TMPDIR ?= /tmp
 t=$(TMPDIR)/$(PACKAGE)/test
 my-distcheck: $(local-check) $(release_archive_dir)/$(prev-tgz)
 	-rm -rf $(t)
 	mkdir -p $(t)
 	GZIP=$(GZIP_ENV) $(AMTAR) -C $(t) -zxf $(distdir).tar.gz
 	cd $(t)/$(distdir)				\
 	  && ./configure --disable-nls			\
 	  && $(MAKE) CFLAGS='-Werror -Wall -Wformat -Wshadow' \
 	      AM_MAKEFLAGS='$(null_AM_MAKEFLAGS)'	\
 	  && $(MAKE) dvi				\
 	  && $(MAKE) check				\
 	  && $(MAKE) distclean
 	(cd $(t) && mv $(distdir) $(distdir).old	\
 	  && $(AMTAR) -zxf - ) < $(distdir).tar.gz
 	diff -ur $(t)/$(distdir).old $(t)/$(distdir)
 	-rm -rf $(t)
 	@echo "========================"; \
 	echo "$(distdir).tar.gz is ready for distribution"; \
 	echo "========================"

 WGET = wget
 WGETFLAGS = -C off

 rel-check:
 	tarz=/tmp/rel-check-tarz-$$$$; \
 	md5_tmp=/tmp/rel-check-md5-$$$$; \
 	set -e; \
 	trap 'status=$$?; rm -f $$tarz $$md5_tmp; exit $$status' 0 1 2 3 15; \
 	$(WGET) $(WGETFLAGS) -q --output-document=$$tarz $(url); \
 	echo "$(md5)  -" > $$md5_tmp; \
 	md5sum -c $$md5_tmp < $$tarz

 prev-tgz = $(PACKAGE)-$(PREV_VERSION).tar.gz
 xd-delta = $(PACKAGE)-$(PREV_VERSION)-$(VERSION).xdelta

 rel-files = $(xd-delta) $(DIST_ARCHIVES)
 announcement: NEWS ChangeLog $(rel-files)
 	@./announce-gen							\
 	    --release-type=$(RELEASE_TYPE)				\
 	    --package=$(PACKAGE)					\
 	    --prev=$(PREV_VERSION)					\
 	    --curr=$(VERSION)						\
 	    --release-archive-directory=$(release_archive_dir)		\
 	    --gpg-key-id=$(gpg_key_ID)					\
 	    --news=NEWS							\
 	    $(addprefix --url-dir=, $(url_dir_list))			\


 ## ---------------- ##
 ## Updating files.  ##
 ## ---------------- ##

 ftp-gnu = ftp://ftp.gnu.org/gnu
 www-gnu = http://www.gnu.org

 # Use mv, if you don't have/want move-if-change.
 move_if_change ?= move-if-change


 # --------------------- #
 # Updating everything.  #
 # --------------------- #

 .PHONY: update
 local_updates ?= wget-update cvs-update po-update
 update: $(local_updates)


 # ------------------- #
 # 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 $$tmppo && \
 	  $(WGET) $(WGETFLAGS) -r -l1 -nd --no-parent -A '*.po' $(po_repo)) &&\
 	cp $$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)/build-aux/config.guess \
   $(srcdir)/build-aux/config.sub \
   $(srcdir)/build-aux/texinfo.tex \
   $(srcdir)/src/ansi2knr.c

 get-targets = $(patsubst %, get-%, $(wget_files))

 config.guess-url_prefix = $(ftp-gnu)/build-aux/
 config.sub-url_prefix = $(ftp-gnu)/build-aux/

 ansi2knr.c-url_prefix = ftp://ftp.cs.wisc.edu/ghost/

 texinfo.tex-url_prefix = $(ftp-gnu)/texinfo/

 standards.texi-url_prefix = $(www-gnu)/prep/
 make-stds.texi-url_prefix = $(standards.texi-url_prefix)

 target = $(patsubst get-%, %, $@)
 url = $($(notdir $(target))-url_prefix)$(notdir $(target))

 .PHONY: $(get-targets)
 $(get-targets):
 	$(WGET) $(WGETFLAGS) $(url) -O $(target).t \
 	  && $(move_if_change) $(target).t $(target)

 cvs_files ?= \
   $(srcdir)/build-aux/depcomp \
   $(srcdir)/build-aux/install-sh \
   $(srcdir)/build-aux/missing \
   $(srcdir)/build-aux/mkinstalldirs \
   $(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:
 	fail=;								\
 	for f in $(cvs_files); do					\
 	  test -f $$f || { echo "*** skipping $$f" 1>&2; continue; };	\
 	  cvs diff $$f > /dev/null					\
 	    || { echo "*** $$f is locally modified; skipping it" 1>&2;	\
 		 fail=yes; continue; };					\
 	  file=$$(basename $$f);					\
 	  echo checking out $$file...;					\
 	  $(CVS) -d $(automake_repo) co -p automake/lib/$$file> $$f.t	\
 	    && $(move_if_change) $$f.t $$f;				\
 	done;								\
 	test "$$fail" && exit 1

 emit_upload_commands:
 	@echo =====================================
 	@echo =====================================
 	@echo "$(srcdir)/gnupload $(GNUPLOADFLAGS) \\"
 	@echo "    --to $(gnu_rel_host):coreutils \\"
 	@echo "  $(rel-files)"
 	@echo '# send the /tmp/announcement e-mail'
 	@echo =====================================
 	@echo =====================================

 $(xd-delta): $(release_archive_dir)/$(prev-tgz) $(distdir).tar.gz
 	xdelta delta -9 $^ $@ || :

 .PHONY: alpha beta major
 alpha beta major: news-date-check $(local-check)
 	$(MAKE) cvs-dist
 	$(MAKE) $(xd-delta)
 	$(MAKE) -s announcement RELEASE_TYPE=$@ > /tmp/announce-$(my_distdir)
 	ln $(rel-files) $(release_archive_dir)
 	chmod a-w $(rel-files)
 	$(MAKE) -s emit_upload_commands RELEASE_TYPE=$@
 	echo $(VERSION) > $(prev_version_file)
 	$(CVS) ci -m. $(prev_version_file)
	# --Makefile--
	# This Makefile fragment is shared between the coreutils,
	# CPPI, Bison, and Autoconf.

	## Copyright (C) 2001-2006 Free Software Foundation, Inc.
	##
	## This program is free software; you can redistribute it and/or modify
	## it under the terms of the GNU General Public License as published by
	## the Free Software Foundation; either version 2, or (at your option)
	## any later version.
	##
	## This program 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 General Public License for more details.
	##
	## You should have received a copy of the GNU General Public License
	## along with this program; if not, write to the Free Software
	## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	## 02110-1301, USA.

	# This is reported not to work with make-3.79.1
	# ME := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
	ME := Makefile.maint

	# Do not save the original name or timestamp in the .tar.gz file.
	# Use --rsyncable if available.
	gzip_rsyncable = \
	(gzip --help\|grep rsyncable) >/dev/null 2>&1 && echo --rsyncable
	GZIP_ENV = "--no-name --best `$(gzip_rsyncable)`"

	CVS = cvs

	# cvsu is part of the cvsutils package: http://www.red-bean.com/cvsutils/
	CVS_LIST = sh -c ' \
	if test -x $(srcdir)/build-aux/cvsu; then \
	$(srcdir)/build-aux/cvsu --find --types=AFGM $$*; \
	else \
	awk -F/ '\''{ \
	if (!$$1 && $$3 !~ /^-/) { \
	f=FILENAME; \
	sub(/CVS\/Entries/, "", f); \
	print f $$2; \
	}}'\'' \
	$$(find $${-} -name Entries -print) /dev/null; \
	fi \
	' dummy

	CVS_LIST_EXCEPT = \
	$(CVS_LIST) \| if test -f .x-$@; then grep -vEf .x-$@; else grep -v ChangeLog; fi

	ifeq ($(origin prev_version_file), undefined)
	prev_version_file = .prev-version
	endif

	PREV_VERSION := $(shell cat $(prev_version_file))
	VERSION_REGEXP = $(subst .,\.,$(VERSION))

	tag-package = $(shell echo "$(PACKAGE)" \| tr '[:lower:]' '[:upper:]')
	tag-this-version = $(subst .,_,$(VERSION))
	this-cvs-tag = $(tag-package)-$(tag-this-version)
	my_distdir = $(PACKAGE)-$(VERSION)

	# Old releases are stored here.
	# Used for diffs and xdeltas.
	release_archive_dir ?= ../release

	# Prevent programs like 'sort' from considering distinct strings to be equal.
	# Doing it here saves us from having to set LC_ALL elsewhere in this file.
	export LC_ALL = C



	## --------------- ##
	## Sanity checks. ##
	## --------------- ##

	# FIXME: add a check to prohibit definition in src/*.c of symbols defined
	# in system.h. E.g. today I removed from tail.c a useless definition of
	# ENOSYS. It was useless because system.h ensures it's defined.

	# Checks that don't require cvs.
	# Run `changelog-check' last, as previous test may reveal problems requiring
	# new ChangeLog entries.
	local-checks-available = \
	po-check copyright-check writable-files m4-check author_mark_check \
	changelog-check strftime-check $(syntax-check-rules) \
	makefile_path_separator_check \
	makefile-check
	.PHONY: $(local-checks-available)

	local-check = $(filter-out $(local-checks-to-skip), $(local-checks-available))

	.PHONY: $(syntax-check-rules)
	syntax-check-rules = \
	sc_cast_of_argument_to_free \
	sc_cast_of_x_alloc_return_value \
	sc_cast_of_alloca_return_value \
	sc_changelog \
	sc_dd_max_sym_length \
	sc_error_exit_success \
	sc_file_system \
	sc_no_if_have_config_h \
	sc_obsolete_symbols \
	sc_prohibit_atoi_atof \
	sc_prohibit_jm_in_m4 \
	sc_prohibit_assert_without_use \
	sc_require_config_h \
	sc_root_tests \
	sc_space_tab \
	sc_sun_os_names \
	sc_system_h_headers \
	sc_tight_scope \
	sc_trailing_blank \
	sc_two_space_separator_in_usage \
	sc_unmarked_diagnostics \
	sc_useless_cpp_parens

	syntax-check: $(syntax-check-rules)
	# @grep -nE '# *include <(limits\|std(def\|arg\|bool))\.h>' \
	# $$(find -type f -name '*.[chly]') && \
	# { echo '$(ME): found conditional include' 1>&2; \
	# exit 1; } \|\| :

	# grep -nE '^# *include <(string\|stdlib)\.h>' \
	# $(srcdir)/{lib,src}/*.[chy] && \
	# { echo '$(ME): FIXME' 1>&2; \
	# exit 1; } \|\| :
	# FIXME: don't allow `#include .strings\.h' anywhere

	sc_cast_of_argument_to_free:
	@grep -nE '\<free \(\(' $(srcdir)/{lib,src}/*.[chly] && \
	{ echo '$(ME): don'\''t cast free argument' 1>&2; \
	exit 1; } \|\| :

	sc_cast_of_x_alloc_return_value:
	@grep -nE --exclude=$(srcdir)/lib/regex.c \
	'\\) x(m\|c\|re)alloc\>' \
	$(srcdir)/{lib,src}/*.[chy] && \
	{ echo '$(ME): don'\''t cast x*alloc return value' 1>&2; \
	exit 1; } \|\| :

	sc_cast_of_alloca_return_value:
	@grep -nE '\\) alloca\>' \
	$(srcdir)/src/*.[chy] && \
	{ echo '$(ME): don'\''t cast alloca return value' 1>&2; \
	exit 1; } \|\| :

	sc_space_tab:
	@grep -n '[ ] ' $$($(CVS_LIST_EXCEPT)) && \
	{ echo '$(ME): found SPACE-TAB sequence; remove the SPACE' \
	1>&2; exit 1; } \|\| :

	# Don't use the old ato* functions in `real' code.
	# They provide no error checking mechanism.
	# Instead, use strto* functions.
	sc_prohibit_atoi_atof:
	@grep -nE '\<ato([filq]\|ll)\>' $$($(CVS_LIST_EXCEPT)) && \
	{ echo '$(ME): do not use ato''f, ato''i, ato''l, ato''ll, or ato''q' \
	1>&2; exit 1; } \|\| :

	# Using EXIT_SUCCESS as the first argument to error is misleading,
	# since when that parameter is 0, error does not exit. Use `0' instead.
	sc_error_exit_success:
	@grep -nF 'error (EXIT_SUCCESS,' \
	$$(find -type f -name '*.[chly]') && \
	{ echo '$(ME): found error (EXIT_SUCCESS' 1>&2; \
	exit 1; } \|\| :

	sc_file_system:
	@grep -ni 'file''system' $$($(CVS_LIST_EXCEPT)) && \
	{ echo '$(ME): found use of "file''system";' \
	'rewrite to use "file system"' 1>&2; \
	exit 1; } \|\| :

	sc_no_if_have_config_h:
	@grep -n '^# *if HAVE_CONFIG_H' $$($(CVS_LIST_EXCEPT)) && \
	{ echo '$(ME): found use of #if HAVE_CONFIG_H; use #ifdef' \
	1>&2; exit 1; } \|\| :

	# Nearly all .c files must include <config.h>.
	sc_require_config_h:
	@grep -L '^# *include <config\.h>' \
	$$($(CVS_LIST_EXCEPT) \| grep '\.c$$') \
	\| grep . && \
	{ echo '$(ME): the above files do not include <config.h>' \
	1>&2; exit 1; } \|\| :

	# Prohibit the inclusion of assert.h without an actual use of assert.
	sc_prohibit_assert_without_use:
	@files=$$(grep -l '# *include <assert\.h>' \
	$$($(CVS_LIST_EXCEPT) \| grep '\.c$$')) && \
	grep -L '\<assert (' $$files \
	\| grep . && \
	{ echo "$(ME): the above files include <assert.h> but don't use it" \
	1>&2; exit 1; } \|\| :

	sc_obsolete_symbols:
	@grep -nE '\<(HAVE''_FCNTL_H\|O''_NDELAY)\>' \
	$$($(CVS_LIST_EXCEPT)) && \
	{ echo '$(ME): do not use HAVE''_FCNTL_H or O''_NDELAY' \
	1>&2; exit 1; } \|\| :

	# FIXME: warn about definitions of EXIT_FAILURE, EXIT_SUCCESS, STREQ

	# Each nonempty line must start with a year number, or a TAB.
	sc_changelog:
	@grep -n '^[^12 ]' $$(find . -maxdepth 2 -name ChangeLog) && \
	{ echo '$(ME): found unexpected prefix in a ChangeLog' 1>&2; \
	exit 1; } \|\| :

	# Ensure that dd's definition of LONGEST_SYMBOL stays in sync
	# with the strings from the two affected variables.
	dd_c = $(srcdir)/src/dd.c
	sc_dd_max_sym_length:
	ifneq ($(wildcard $(dd_c)),)
	@len=$$( (sed -n '/conversions\[\] =$$/,/^};/p' $(dd_c);\
	sed -n '/flags\[\] =$$/,/^};/p' $(dd_c) ) \
	\|sed -n '/"/s/^[^"]"\([^"]\)".*/\1/p' \
	\| wc --max-line-length); \
	max=$$(sed -n '/^#define LONGEST_SYMBOL /s///p' $(dd_c) \
	\|tr -d '"' \| wc --max-line-length); \
	if test "$$len" = "$$max"; then :; else \
	echo 'dd.c: LONGEST_SYMBOL is not longest' 1>&2; \
	exit 1; \
	fi
	endif

	# Many m4 macros names once began with `jm_'.
	# On 2004-04-13, they were all changed to start with gl_ instead.
	# Make sure that none are inadvertently reintroduced.
	sc_prohibit_jm_in_m4:
	@grep -nE 'jm_[A-Z]' \
	$$($(CVS_LIST) $(srcdir)/m4 \|grep '\.m4$$') && \
	{ echo '$(ME): do not use jm_ in m4 macro names' \
	1>&2; exit 1; } \|\| :

	sc_root_tests:
	@t1=sc-root.expected; t2=sc-root.actual; \
	grep -nl '^PRIV_CHECK_ARG=require-root' \
	$$($(CVS_LIST) tests) \|sed s,tests,., \|sort > $$t1; \
	sed -n 's, cd \([^ ]\) .MAKE..check TESTS=\(.*\),./\1/\2,p' \
	$(srcdir)/tests/Makefile.am \|sort > $$t2; \
	diff -u $$t1 $$t2 \|\| diff=1; \
	rm -f $$t1 $$t2; \
	test "$$diff" \
	&& { echo 'tests/Makefile.am: missing check-root action'>&2; \
	exit 1; } \|\| :

	# Create a list of regular expressions matching the names
	# of files included from system.h. Exclude a couple.
	.re-list:
	@sed -n '/^# *include /s///p' $(srcdir)/src/system.h \
	\| grep -Ev 'sys/(param\|file)\.h' \
	\| sed 's/ .//;;s/^["<]/^# include [<"]/;s/\.h[">]$$/\\.h[">]/' \
	> $@-t
	@mv $@-t $@

	# Files in src/ should not include directly any of
	# the headers already included via system.h.
	sc_system_h_headers: .re-list
	@if test -f $(srcdir)/src/system.h; then \
	trap 'rc=$$?; rm -f .re-list; exit $$rc' 0 1 2 3 15; \
	grep -nE -f .re-list \
	$$($(CVS_LIST) src \| \
	grep -Ev '((copy\|system)\.h\|parse-gram\.c)$$') \
	&& { echo '$(ME): the above are already included via system.h'\
	1>&2; exit 1; } \|\| :; \
	fi

	sc_sun_os_names:
	@grep -nEi \
	'solaris[^[:alnum:]]*2\.(7\|8\|9\|[1-9][0-9])\|sunos[^[:alnum:]][6-9]' \
	$$($(CVS_LIST_EXCEPT)) && \
	{ echo '$(ME): found misuse of Sun OS version numbers' 1>&2; \
	exit 1; } \|\| :

	sc_tight_scope:
	$(MAKE) -C src $@

	sc_trailing_blank:
	@grep -n '[ ]$$' $$($(CVS_LIST_EXCEPT)) && \
	{ echo '$(ME): found trailing blank(s)' \
	1>&2; exit 1; } \|\| :

	sc_two_space_separator_in_usage:
	@grep -n '^ --[a-z][0-9A-Za-z-] [^ ].*\\$$' \
	$$($(CVS_LIST_EXCEPT)) && \
	{ echo "$(ME): help2man requires at least two spaces between"; \
	echo "$(ME): an option and its description"; \
	1>&2; exit 1; } \|\| :

	# Look for diagnostics that aren't marked for translation.
	# This won't find any for which error's format string is on a separate line.
	sc_unmarked_diagnostics:
	@grep -nE \
	'\<error \([^"]"[^"][a-z]{3}' $$($(CVS_LIST_EXCEPT)) \
	\| grep -v '_''(' && \
	{ echo '$(ME): found unmarked diagnostic(s)' 1>&2; \
	exit 1; } \|\| :

	# Avoid useless parentheses like those in this example:
	# #if defined (SYMBOL) \|\| defined (SYM2)
	sc_useless_cpp_parens:
	@grep -n '^# if .defined *(' $$($(CVS_LIST_EXCEPT)) && \
	{ echo '$(ME): found useless parentheses in cpp directive' \
	1>&2; exit 1; } \|\| :

	# Ensure that date's --help output stays in sync with the info
	# documentation for GNU strftime. The only exception is %N,
	# which date accepts but GNU strftime does not.
	extract_char = sed 's/^[^%][^%]%\(.\)./\1/'
	strftime-check:
	if test -f $(srcdir)/src/date.c; then \
	grep '^ %. ' $(srcdir)/src/date.c \| sort \
	\| $(extract_char) > $@-src; \
	{ echo N; \
	info libc date calendar format \| grep '^ `%.'\' \
	\| $(extract_char); } \| sort > $@-info; \
	diff -u $@-src $@-info \|\| exit 1; \
	rm -f $@-src $@-info; \
	fi

	# Ensure that we use only the standard $(VAR) notation,
	# not @...@ in Makefile.am, now that we can rely on automake
	# to emit a definition for each substituted variable.
	makefile-check:
	grep -nE '@[A-Z_0-9]+@' `find . -name Makefile.am` \
	&& { echo 'Makefile.maint: use $$(...), not @...@' 1>&2; exit 1; } \|\| :

	news-date-check: NEWS
	today=`date +%Y-%m-%d`; \
	if head NEWS \| grep '^\. $(VERSION_REGEXP) ('$$today')' \
	>/dev/null; then \
	:; \
	else \
	echo "version or today's date is not in NEWS" 1>&2; \
	exit 1; \
	fi

	changelog-check:
	if head ChangeLog \| grep 'Version $(VERSION_REGEXP)\.$$' \
	>/dev/null; then \
	:; \
	else \
	echo "$(VERSION) not in ChangeLog" 1>&2; \
	exit 1; \
	fi

	m4-check:
	@grep -n 'AC_DEFUN([^[]' m4/*.m4 \
	&& { echo 'Makefile.maint: quote the first arg to AC_DEFUN' 1>&2; \
	exit 1; } \|\| :

	# Verify that all source files using _() are listed in po/POTFILES.in.
	# FIXME: don't hard-code file names below; use a more general mechanism.
	po-check:
	if test -f po/POTFILES.in; then \
	grep -E -v '^(#\|$$)' po/POTFILES.in \
	\| grep -v '^src/false\.c$$' \| sort > $@-1; \
	files=; \
	for file in $$($(CVS_LIST_EXCEPT)) lib/*.[ch]; do \
	case $$file in \
	djgpp/* \| man/*) continue;; \
	esac; \
	case $$file in \
	*.[ch]) \
	base=`expr " $$file" : ' \(.*\)\..'`; \
	{ test -f $$base.l \|\| test -f $$base.y; } && continue;; \
	esac; \
	files="$$files $$file"; \
	done; \
	grep -E -l '\bN?_\([^)"]*("\|$$)' $$files \| sort -u > $@-2; \
	diff -u $@-1 $@-2 \|\| exit 1; \
	rm -f $@-1 $@-2; \
	fi

	# In a definition of #define AUTHORS "... and ..." where the RHS contains
	# the English word `and', the string must be marked with `N_ (...)' so that
	# gettext recognizes it as a string requiring translation.
	author_mark_check:
	@grep -n '^# define AUTHORS "[^"] and ' src/*.c \|grep -v ' N_ (' && \
	{ echo 'Makefile.maint: enclose the above strings in N_ (...)' 1>&2; \
	exit 1; } \|\| :

	# Sometimes it is useful to change the PATH environment variable
	# in Makefiles. When doing so, it's better not to use the Unix-centric
	# path separator of `:', but rather the automake-provided `@PATH_SEPARATOR@'.
	# It'd be better to use `find -print0 ...\|xargs -0 ...', but less portable,
	# and there probably aren't many projects with so many Makefile.am files
	# that we'd have to worry about limits on command line length.
	msg = 'Makefile.maint: Do not use `:'\'' above; use @PATH_SEPARATOR@ instead'
	makefile_path_separator_check:
	@grep -n 'PATH=.*:' `find $(srcdir) -name Makefile.am` \
	&& { echo $(msg) 1>&2; exit 1; } \|\| :

	# Check that `make alpha' will not fail at the end of the process.
	writable-files:
	if test -d $(release_archive_dir); then :; else \
	mkdir $(release_archive_dir); \
	fi
	for file in $(distdir).tar.gz $(xd-delta) \
	$(release_archive_dir)/$(distdir).tar.gz \
	$(release_archive_dir)/$(xd-delta); do \
	test -e $$file \|\| continue; \
	test -w $$file \
	\|\| { echo ERROR: $$file is not writable; fail=1; }; \
	done; \
	test "$$fail" && exit 1 \|\| :

	v_etc_file = lib/version-etc.c
	# Make sure that the copyright date in $(v_etc_file) is up to date.
	copyright-check:
	@if test -f $(v_etc_file); then \
	grep 'enum { COPYRIGHT_YEAR = '$$(date +%Y)' };' $(v_etc_file) \
	>/dev/null \
	\|\| { echo 'out of date copyright in $(v_etc_file); update it' 1>&2; \
	exit 1; }; \
	fi


	# Sanity checks with the CVS repository.
	cvs-tag-check:
	echo $(this-cvs-tag); \
	if $(CVS) -n log -h README \| grep -e $(this-cvs-tag): >/dev/null; then \
	echo "$(this-cvs-tag) as already been used; not tagging" 1>&2; \
	exit 1; \
	else :; fi

	cvs-diff-check:
	if $(CVS) diff >cvs-diffs; then \
	rm cvs-diffs; \
	else \
	echo "Some files are locally modified:" 1>&2; \
	cat cvs-diffs; \
	exit 1; \
	fi

	cvs-check: cvs-diff-check cvs-tag-check

	maintainer-distcheck: changelog-check
	$(MAKE) distcheck
	$(MAKE) my-distcheck


	# Tag before making distribution. Also, don't make a distribution if
	# checks fail. Also, make sure the NEWS file is up-to-date.
	# FIXME: use dist-hook/my-dist like distcheck-hook/my-distcheck.
	cvs-dist: $(local-check) cvs-check maintainer-distcheck
	$(CVS) update po
	$(CVS) tag -c $(this-cvs-tag)
	$(MAKE) dist

	# Use this to make sure we don't run these programs when building
	# from a virgin tgz file, below.
	null_AM_MAKEFLAGS = \
	ACLOCAL=false \
	AUTOCONF=false \
	AUTOMAKE=false \
	AUTOHEADER=false \
	MAKEINFO=false

	# Detect format-string/arg-list mismatches that would normally be obscured
	# by the use of _(). The --disable-nls effectively defines away that macro,
	# and building with CFLAGS='-Wformat -Werror' causes any format warning to be
	# treated as a failure. Also, check for shadowing problems with -Wshadow.
	# These CFLAGS are pretty strict. If you build this target, you probably
	# have to have a recent version of gcc and glibc headers.
	TMPDIR ?= /tmp
	t=$(TMPDIR)/$(PACKAGE)/test
	my-distcheck: $(local-check) $(release_archive_dir)/$(prev-tgz)
	-rm -rf $(t)
	mkdir -p $(t)
	GZIP=$(GZIP_ENV) $(AMTAR) -C $(t) -zxf $(distdir).tar.gz
	cd $(t)/$(distdir) \
	&& ./configure --disable-nls \
	&& $(MAKE) CFLAGS='-Werror -Wall -Wformat -Wshadow' \
	AM_MAKEFLAGS='$(null_AM_MAKEFLAGS)' \
	&& $(MAKE) dvi \
	&& $(MAKE) check \
	&& $(MAKE) distclean
	(cd $(t) && mv $(distdir) $(distdir).old \
	&& $(AMTAR) -zxf - ) < $(distdir).tar.gz
	diff -ur $(t)/$(distdir).old $(t)/$(distdir)
	-rm -rf $(t)
	@echo "========================"; \
	echo "$(distdir).tar.gz is ready for distribution"; \
	echo "========================"

	WGET = wget
	WGETFLAGS = -C off

	rel-check:
	tarz=/tmp/rel-check-tarz-$$$$; \
	md5_tmp=/tmp/rel-check-md5-$$$$; \
	set -e; \
	trap 'status=$$?; rm -f $$tarz $$md5_tmp; exit $$status' 0 1 2 3 15; \
	$(WGET) $(WGETFLAGS) -q --output-document=$$tarz $(url); \
	echo "$(md5) -" > $$md5_tmp; \
	md5sum -c $$md5_tmp < $$tarz

	prev-tgz = $(PACKAGE)-$(PREV_VERSION).tar.gz
	xd-delta = $(PACKAGE)-$(PREV_VERSION)-$(VERSION).xdelta

	rel-files = $(xd-delta) $(DIST_ARCHIVES)
	announcement: NEWS ChangeLog $(rel-files)
	@./announce-gen \
	--release-type=$(RELEASE_TYPE) \
	--package=$(PACKAGE) \
	--prev=$(PREV_VERSION) \
	--curr=$(VERSION) \
	--release-archive-directory=$(release_archive_dir) \
	--gpg-key-id=$(gpg_key_ID) \
	--news=NEWS \
	$(addprefix --url-dir=, $(url_dir_list)) \


	## ---------------- ##
	## Updating files. ##
	## ---------------- ##

	ftp-gnu = ftp://ftp.gnu.org/gnu
	www-gnu = http://www.gnu.org

	# Use mv, if you don't have/want move-if-change.
	move_if_change ?= move-if-change


	# --------------------- #
	# Updating everything. #
	# --------------------- #

	.PHONY: update
	local_updates ?= wget-update cvs-update po-update
	update: $(local_updates)


	# ------------------- #
	# 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 $$tmppo && \
	$(WGET) $(WGETFLAGS) -r -l1 -nd --no-parent -A '*.po' $(po_repo)) &&\
	cp $$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)/build-aux/config.guess \
	$(srcdir)/build-aux/config.sub \
	$(srcdir)/build-aux/texinfo.tex \
	$(srcdir)/src/ansi2knr.c

	get-targets = $(patsubst %, get-%, $(wget_files))

	config.guess-url_prefix = $(ftp-gnu)/build-aux/
	config.sub-url_prefix = $(ftp-gnu)/build-aux/

	ansi2knr.c-url_prefix = ftp://ftp.cs.wisc.edu/ghost/

	texinfo.tex-url_prefix = $(ftp-gnu)/texinfo/

	standards.texi-url_prefix = $(www-gnu)/prep/
	make-stds.texi-url_prefix = $(standards.texi-url_prefix)

	target = $(patsubst get-%, %, $@)
	url = $($(notdir $(target))-url_prefix)$(notdir $(target))

	.PHONY: $(get-targets)
	$(get-targets):
	$(WGET) $(WGETFLAGS) $(url) -O $(target).t \
	&& $(move_if_change) $(target).t $(target)

	cvs_files ?= \
	$(srcdir)/build-aux/depcomp \
	$(srcdir)/build-aux/install-sh \
	$(srcdir)/build-aux/missing \
	$(srcdir)/build-aux/mkinstalldirs \
	$(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:
	fail=; \
	for f in $(cvs_files); do \
	test -f $$f \|\| { echo "*** skipping $$f" 1>&2; continue; }; \
	cvs diff $$f > /dev/null \
	\|\| { echo "*** $$f is locally modified; skipping it" 1>&2; \
	fail=yes; continue; }; \
	file=$$(basename $$f); \
	echo checking out $$file...; \
	$(CVS) -d $(automake_repo) co -p automake/lib/$$file> $$f.t \
	&& $(move_if_change) $$f.t $$f; \
	done; \
	test "$$fail" && exit 1

	emit_upload_commands:
	@echo =====================================
	@echo =====================================
	@echo "$(srcdir)/gnupload $(GNUPLOADFLAGS) \\"
	@echo " --to $(gnu_rel_host):coreutils \\"
	@echo " $(rel-files)"
	@echo '# send the /tmp/announcement e-mail'
	@echo =====================================
	@echo =====================================

	$(xd-delta): $(release_archive_dir)/$(prev-tgz) $(distdir).tar.gz
	xdelta delta -9 $^ $@ \|\| :

	.PHONY: alpha beta major
	alpha beta major: news-date-check $(local-check)
	$(MAKE) cvs-dist
	$(MAKE) $(xd-delta)
	$(MAKE) -s announcement RELEASE_TYPE=$@ > /tmp/announce-$(my_distdir)
	ln $(rel-files) $(release_archive_dir)
	chmod a-w $(rel-files)
	$(MAKE) -s emit_upload_commands RELEASE_TYPE=$@
	echo $(VERSION) > $(prev_version_file)
	$(CVS) ci -m. $(prev_version_file)