autoconf/Makefile.maint
2006-04-12 21:24:56 +00:00

621 lines
20 KiB
Makefile

# -*-Makefile-*-
# This Makefile fragment is shared between the coreutils,
# CPPI, Bison, and Autoconf.
## Copyright (C) 2001, 2002, 2003, 2004, 2005, 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_ENV = \
"--no-name --best$$( \
case $$(gzip --help) in \
(*--rsyncable*) echo ' --rsyncable';; \
esac \
)"
CVS = cvs
CVS_LIST = sh -c ' \
(cvsu --find --types=AFGM $$*) 2>/dev/null || \
awk -F/ '\''{ \
if (!$$1 && $$3 !~ /^-/) { \
f=FILENAME; \
sub(/CVS\/Entries/, "", f); \
print f $$2; \
}}'\'' \
$$(find $${*-*} -name Entries -print) /dev/null \
' 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))
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. ##
## --------------- ##
# 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 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_obsolete_symbols \
sc_prohibit_atoi_atof \
sc_prohibit_jm_in_m4 \
sc_root_tests \
sc_space_tab \
sc_sun_os_names \
sc_system_h_headers \
sc_tight_scope \
sc_trailing_space \
sc_unmarked_diagnostics \
sc_texi_notab
syntax-check: $(syntax-check-rules)
# @shopt -s nullglob; \
# grep -nE '# *include <(limits|std(def|arg|bool))\.h>' \
# $$(find -type f -name '*.[chly]') /dev/null && \
# { echo '$(ME): found conditional include' 1>&2; \
# exit 1; } || :
# grep -nE '^# *include <(string|stdlib)\.h>' \
# $(srcdir)/{lib,src}/*.[chy] /dev/null && \
# { echo '$(ME): FIXME' 1>&2; \
# exit 1; } || :
# FIXME: don't allow `#include .strings\.h' anywhere
sc_cast_of_argument_to_free:
@shopt -s nullglob; \
grep -nE '\<free \(\(' \
$(srcdir)/{lib,src}/*.[chly] /dev/null && \
{ echo '$(ME): don'\''t cast free argument' 1>&2; \
exit 1; } || :
sc_cast_of_x_alloc_return_value:
@shopt -s nullglob; \
grep -nE --exclude=$(srcdir)/lib/regex.c \
'\*\) *x(m|c|re)alloc\>' \
$(srcdir)/{lib,src}/*.[chy] /dev/null && \
{ echo '$(ME): don'\''t cast x*alloc return value' 1>&2; \
exit 1; } || :
sc_cast_of_alloca_return_value:
@shopt -s nullglob; \
grep -nE '\*\) *alloca\>' \
$(srcdir)/src/*.[chy] /dev/null && \
{ echo '$(ME): don'\''t cast alloca return value' 1>&2; \
exit 1; } || :
sc_space_tab:
@grep -n '[ ] ' \
$$($(CVS_LIST_EXCEPT)) && \
{ echo '$(ME): found SPACE-TAB sequence; remove the SPACE' \
1>&2; exit 1; } || :
# Don't use the old ato* functions in `real' code.
# They provide no error checking mechanism.
# Instead, use strto* functions.
sc_prohibit_atoi_atof:
@grep -nE '\<(ato[filq]|ato''ll)\>' \
$$($(CVS_LIST_EXCEPT)) && \
{ echo '$(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,' \
$$(find -type f -name '*.[chly]') /dev/null && \
{ echo '$(ME): found error (EXIT_SUCCESS' 1>&2; \
exit 1; } || :
sc_file_system:
@grep -ni 'file''system' \
$$($(CVS_LIST_EXCEPT)) && \
{ echo '$(ME): found use of "file''system";' \
'rewrite to use "file system"' 1>&2; \
exit 1; } || :
sc_obsolete_symbols:
@grep -nE '\<(HAVE_''FCNTL_H)\>' \
$$($(CVS_LIST_EXCEPT)) && \
{ echo '$(ME): do not use HAVE_''FCNTL_H' \
1>&2; exit 1; } || :
# FIXME: warn about definitions of EXIT_FAILURE, EXIT_SUCCESS, STREQ
# Do not use TABs in .texi files, except in verbatim environments.
sc_texi_notab:
@sed '/^@verbatim/,/^@end verbatim/d' /dev/null \
$$($(CVS_LIST_EXCEPT) | grep -E '\.(texi|txi|texinfo)$$' ) \
| grep '[ ]' && \
{ echo '$(ME): Do not use TABs in texinfo files outside of @verbatim' \
1>&2; exit 1; } || :
# Each nonempty line must start with a year number, or a TAB.
sc_changelog:
@sed '/^-----/,$$d' $$(find . -maxdepth 2 -name ChangeLog) \
| grep -n '^[^12 ]' && \
{ echo '$(ME): found unexpected prefix in a ChangeLog' 1>&2; \
exit 1; } || :
# Ensure that dd's definition of LONGEST_SYMBOL stays in sync
# with the strings from the two affected variables.
dd_c = $(srcdir)/src/dd.c
sc_dd_max_sym_length:
ifneq ($(wildcard $(dd_c)),)
@len=$$( (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" = "$$max"; then :; else \
echo 'dd.c: LONGEST_SYMBOL is not longest' 1>&2; \
exit 1; \
fi
endif
# Many m4 macros names once began with `jm_'.
# On 2004-04-13, they were all changed to start with gl_ instead.
# Make sure that none are inadvertently reintroduced.
sc_prohibit_jm_in_m4:
@grep -nE 'jm_[A-Z]' /dev/null \
$$($(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:
@shopt -s nullglob; \
sed -n '/^# *include /s///p' $(srcdir)/src/system.[h] /dev/null \
| 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:
@if test -d src; then $(MAKE) -C src $@; else :; fi
sc_trailing_space:
@grep -n '[ ]$$' \
$$($(CVS_LIST_EXCEPT)) && \
{ echo '$(ME): found trailing space(s)' \
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:
@shopt -s nullglob; \
grep -nE '\<error \([^"]*"[^"]*[a-z]{3}' \
$(srcdir)/{lib,src}/*.c /dev/null \
| grep -v '_(' && \
{ echo '$(ME): found unmarked diagnostic(s)' 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 $$(...), not @...@' 1>&2; exit 1; } || :
news-date-check: NEWS
today=`date +%Y-%m-%d`; \
if head NEWS | grep $$today >/dev/null; then \
:; \
else \
echo "today's date is not in NEWS" 1>&2; \
exit 1; \
fi
changelog-check:
if head ChangeLog | grep 'Version $(VERSION)' >/dev/null; then \
:; \
else \
echo "$(VERSION) not in ChangeLog" 1>&2; \
exit 1; \
fi
m4-check:
@shopt -s nullglob; \
grep 'AC_DEFUN([^[]' m4/*.m4 /dev/null \
&& { 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 src/false.c 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 lib/*.[chly] src/*.[chly]; do \
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 > $@-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)
-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
tgz-md5 = $(shell md5sum < $(my_distdir).tar.gz|sed 's/ -//')
tgz-sha1 = $(shell sha1sum < $(my_distdir).tar.gz|sed 's/ -//')
bz2-md5 = $(shell md5sum < $(my_distdir).tar.bz2|sed 's/ -//')
bz2-sha1 = $(shell sha1sum < $(my_distdir).tar.bz2|sed 's/ -//')
xdelta-md5 = $(shell md5sum < $(xd-delta)|sed 's/ -//')
xdelta-sha1 = $(shell sha1sum < $(xd-delta)|sed 's/ -//')
tgz-size = $(shell du --human $(my_distdir).tar.gz|sed 's/\([MkK]\).*/ \1B/')
bz2-size = $(shell du --human $(my_distdir).tar.bz2|sed 's/\([MkK]\).*/ \1B/')
xd-size = $(shell du --human $(xd-delta)|sed 's/\([MkK]\).*/ \1B/')
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 < $$tarz
prev-tgz = $(PACKAGE)-$(PREV_VERSION).tar.gz
xd-delta = $(PACKAGE)-$(PREV_VERSION)-$(VERSION).xdelta
rel-files = $(xd-delta) $(DIST_ARCHIVES)
announcement: NEWS ChangeLog $(rel-files)
@$(announce_gen) \
--release-type=$(RELEASE_TYPE) \
--package=$(PACKAGE) \
--prev=$(PREV_VERSION) \
--curr=$(VERSION) \
--release-archive-directory=$(release_archive_dir) \
--news=NEWS \
$(addprefix --url-dir=, $(url_dir_list)) \
## ---------------- ##
## Updating files. ##
## ---------------- ##
ftp-gnu = ftp://ftp.gnu.org/gnu
www-gnu = http://www.gnu.org
cvs-sv = http://cvs.savannah.gnu.org/viewcvs/~checkout~
# Use mv, if you don't have/want move-if-change.
move_if_change ?= move-if-change
# --------------------- #
# Updating everything. #
# --------------------- #
.PHONY: update
local_updates ?= wget-update cvs-update po-update
update: $(local_updates)
# ------------------- #
# Updating PO files. #
# ------------------- #
po_repo = http://www.iro.umontreal.ca/contrib/po/maint/$(PACKAGE)
.PHONY: do-po-update po-update
do-po-update:
tmppo=/tmp/$(PACKAGE)-$(VERSION)-po &&\
rm -rf $$tmppo && \
mkdir $$tmppo && \
(cd $$tmppo && \
$(WGET) $(WGETFLAGS) -r -l1 -nd --no-parent -A '*.po' $(po_repo)) &&\
cp $$tmppo/*.po po
cd po && $(MAKE) update-po
$(MAKE) po-check
po-update:
if test -d "po"; then \
$(MAKE) do-po-update; \
fi
# -------------------------- #
# Updating GNU build tools. #
# -------------------------- #
# The following pseudo table associates a local directory and a URL
# with each of the files that belongs to some other package and is
# regularly updated from the specified URL.
wget_files ?= \
$(srcdir)/build-aux/config.guess \
$(srcdir)/build-aux/config.sub \
$(srcdir)/build-aux/texinfo.tex \
$(srcdir)/src/ansi2knr.c
get-targets = $(patsubst %, get-%, $(wget_files))
config.guess-url_prefix = $(cvs-sv)/config/config/
config.sub-url_prefix = $(cvs-sv)/config/config/
ansi2knr.c-url_prefix = ftp://ftp.cs.wisc.edu/ghost/
texinfo.tex-url_prefix = $(cvs-sv)/gnulib/gnulib/build-aux/
standards.texi-url_prefix = $(cvs-sv)/gnulib/gnulib/doc/
make-stds.texi-url_prefix = $(standards.texi-url_prefix)
target = $(patsubst get-%, %, $@)
url = $($(notdir $(target))-url_prefix)$(notdir $(target))
.PHONY: $(get-targets)
$(get-targets):
$(WGET) $(WGETFLAGS) $(url) -O $(target).t \
&& $(move_if_change) $(target).t $(target)
cvs_files ?= \
$(srcdir)/build-aux/depcomp \
$(srcdir)/build-aux/install-sh \
$(srcdir)/build-aux/missing \
$(srcdir)/build-aux/mkinstalldirs \
$(srcdir)/src/ansi2knr.c
automake_repo=:pserver:anoncvs:anoncvs@sources.redhat.com:/cvs/automake
.PHONY: wget-update
wget-update: $(get-targets)
.PHONY: cvs-update
cvs-update:
exit_status=0; \
for f in $(cvs_files); do \
test -f $$f || { echo "*** skipping $$f" 1>&2; continue; }; \
cvs diff $$f > /dev/null \
|| { exit_status=$$?; \
echo "*** $$f is locally modified; skipping it" 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 $$f || exit_status=$$?; \
done; \
exit $$exit_status
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)