# This Makefile fragment tries to be general-purpose enough to be
# used by many projects via the gnulib maintainer-makefile module.
-## Copyright (C) 2001-2013 Free Software Foundation, Inc.
+## Copyright (C) 2001-2018 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
## 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, see <http://www.gnu.org/licenses/>.
+## along with this program. If not, see <https://www.gnu.org/licenses/>.
# This is reported not to work with make-3.79.1
# ME := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
ME := maint.mk
-# Diagnostic for continued use of deprecated variable.
-# Remove in 2013
-ifneq ($(build_aux),)
- $(error "$(ME): \
-set $$(_build-aux) relative to $$(srcdir) instead of $$(build_aux)")
-endif
-
# Helper variables.
_empty =
_sp = $(_empty) $(_empty)
VC_LIST = $(srcdir)/$(_build-aux)/vc-list-files -C $(srcdir)
+# You can override this variable in cfg.mk if your gnulib submodule lives
+# in a different location.
+gnulib_dir ?= $(srcdir)/gnulib
+
# You can override this variable in cfg.mk to set your own regexp
# matching files to ignore.
VC_LIST_ALWAYS_EXCLUDE_REGEX ?= ^$$
ifeq ($(srcdir),.)
_prepend_srcdir_prefix =
else
- _prepend_srcdir_prefix = | sed 's|^|$(srcdir)/|'
+ _prepend_srcdir_prefix = | $(SED) 's|^|$(srcdir)/|'
endif
# In order to be able to consistently filter "."-relative names,
_sc_excl = \
$(or $(exclude_file_name_regexp--$@),^$$)
VC_LIST_EXCEPT = \
- $(VC_LIST) | sed 's|^$(_dot_escaped_srcdir)/||' \
+ $(VC_LIST) | $(SED) 's|^$(_dot_escaped_srcdir)/||' \
| if test -f $(srcdir)/.x-$@; then grep -vEf $(srcdir)/.x-$@; \
else grep -Ev -e "$${VC_LIST_EXCEPT_DEFAULT-ChangeLog}"; fi \
| grep -Ev -e '($(VC_LIST_ALWAYS_EXCLUDE_REGEX)|$(_sc_excl))' \
gnu_rel_host ?= $(gnu_ftp_host-$(release-type))
url_dir_list ?= $(if $(call _equal,$(gnu_rel_host),ftp.gnu.org), \
- http://ftpmirror.gnu.org/$(PACKAGE), \
- ftp://$(gnu_rel_host)/gnu/$(PACKAGE))
+ https://ftpmirror.gnu.org/$(PACKAGE), \
+ https://$(gnu_rel_host)/gnu/$(PACKAGE))
# Override this in cfg.mk if you are using a different format in your
# NEWS file.
## Sanity checks. ##
## --------------- ##
+ifneq ($(_gl-Makefile),)
_cfg_mk := $(wildcard $(srcdir)/cfg.mk)
# Collect the names of rules starting with 'sc_'.
-syntax-check-rules := $(sort $(shell sed -n 's/^\(sc_[a-zA-Z0-9_-]*\):.*/\1/p' \
- $(srcdir)/$(ME) $(_cfg_mk)))
+syntax-check-rules := $(sort $(shell $(SED) -n \
+ 's/^\(sc_[a-zA-Z0-9_-]*\):.*/\1/p' $(srcdir)/$(ME) $(_cfg_mk)))
.PHONY: $(syntax-check-rules)
ifeq ($(shell $(VC_LIST) >/dev/null 2>&1; echo $$?),0)
$(filter-out $(local-checks-to-skip), $(local-checks-available)))
syntax-check: $(local-check)
+endif
# _sc_search_regexp
#
sc_file_system:
@prohibit=file''system \
+ exclude='/proc/filesystems' \
ignore_case=1 \
halt='found use of "file''system"; spell it "file system"' \
$(_sc_search_regexp)
halt='the above files do not include <config.h>' \
$(_sc_search_regexp)
+# Print each file name for which the first #include does not match
+# $(config_h_header). Like grep -m 1, this only looks at the first match.
+perl_config_h_first_ = \
+ -e 'BEGIN {$$ret = 0}' \
+ -e 'if (/^\# *include\b/) {' \
+ -e ' if (not m{^\# *include $(config_h_header)}) {' \
+ -e ' print "$$ARGV\n";' \
+ -e ' $$ret = 1;' \
+ -e ' }' \
+ -e ' \# Move on to next file after first include' \
+ -e ' close ARGV;' \
+ -e '}' \
+ -e 'END {exit $$ret}'
+
# You must include <config.h> before including any other header file.
# This can possibly be via a package-specific header, if given by cfg.mk.
sc_require_config_h_first:
- @if $(VC_LIST_EXCEPT) | grep -l '\.c$$' > /dev/null; then \
- fail=0; \
- for i in $$($(VC_LIST_EXCEPT) | grep '\.c$$'); do \
- grep '^# *include\>' $$i | sed 1q \
- | grep -E '^# *include $(config_h_header)' > /dev/null \
- || { echo $$i; fail=1; }; \
- done; \
- test $$fail = 1 && \
+ @if $(VC_LIST_EXCEPT) | grep '\.c$$' > /dev/null; then \
+ files=$$($(VC_LIST_EXCEPT) | grep '\.c$$') && \
+ perl -n $(perl_config_h_first_) $$files || \
{ echo '$(ME): the above files include some other header' \
'before <config.h>' 1>&2; exit 1; } || :; \
else :; \
# re: a regular expression that matches IFF something provided by $h is used.
define _sc_header_without_use
dummy=; : so we do not need a semicolon before each use; \
- h_esc=`echo '[<"]'"$$h"'[">]'|sed 's/\./\\\\./g'`; \
- if $(VC_LIST_EXCEPT) | grep -l '\.c$$' > /dev/null; then \
+ h_esc=`echo '[<"]'"$$h"'[">]'|$(SED) 's/\./\\\\./g'`; \
+ if $(VC_LIST_EXCEPT) | grep '\.c$$' > /dev/null; then \
files=$$(grep -l '^# *include '"$$h_esc" \
$$($(VC_LIST_EXCEPT) | grep '\.c$$')) && \
grep -LE "$$re" $$files | grep . && \
@h='posixver.h' re='\<posix2_version *\(' $(_sc_header_without_use)
sc_prohibit_same_without_use:
- @h='same.h' re='\<same_name *\(' $(_sc_header_without_use)
+ @h='same.h' re='\<same_name(at)? *\(' $(_sc_header_without_use)
sc_prohibit_hash_pjw_without_use:
@h='hash-pjw.h' \
sc_prohibit_openat_without_use:
@h='openat.h' \
- re='\<(openat_(permissive|needs_fchdir|(save|restore)_fail)|l?(stat|ch(own|mod))at|(euid)?accessat)\>' \
+ re='\<(openat_(permissive|needs_fchdir|(save|restore)_fail)|l?(stat|ch(own|mod))at|(euid)?accessat|(FCHMOD|FCHOWN|STAT)AT_INLINE)\>' \
$(_sc_header_without_use)
# Prohibit the inclusion of c-ctype.h without an actual use.
re='\<(strn?casecmp|ffs(ll)?)\>' \
$(_sc_header_without_use)
-# Get the list of symbol names with this:
-# perl -lne '/^# *define ([A-Z]\w+)\(/ and print $1' lib/intprops.h|fmt
-_intprops_names = \
- TYPE_IS_INTEGER TYPE_TWOS_COMPLEMENT TYPE_ONES_COMPLEMENT \
- TYPE_SIGNED_MAGNITUDE TYPE_SIGNED TYPE_MINIMUM TYPE_MAXIMUM \
- INT_BITS_STRLEN_BOUND INT_STRLEN_BOUND INT_BUFSIZE_BOUND \
- INT_ADD_RANGE_OVERFLOW INT_SUBTRACT_RANGE_OVERFLOW \
- INT_NEGATE_RANGE_OVERFLOW INT_MULTIPLY_RANGE_OVERFLOW \
- INT_DIVIDE_RANGE_OVERFLOW INT_REMAINDER_RANGE_OVERFLOW \
- INT_LEFT_SHIFT_RANGE_OVERFLOW INT_ADD_OVERFLOW INT_SUBTRACT_OVERFLOW \
- INT_NEGATE_OVERFLOW INT_MULTIPLY_OVERFLOW INT_DIVIDE_OVERFLOW \
- INT_REMAINDER_OVERFLOW INT_LEFT_SHIFT_OVERFLOW
+# Extract the raw list of symbol names with this:
+gl_extract_define_simple = \
+ /^\# *define ([A-Z]\w+)\(/ and print $$1
+# Filter out duplicates and convert to a space-separated list:
+_intprops_names = \
+ $(shell f=$(gnulib_dir)/lib/intprops.h; \
+ perl -lne '$(gl_extract_define_simple)' $$f | sort -u | tr '\n' ' ')
+# Remove trailing space and convert to a regular expression:
_intprops_syms_re = $(subst $(_sp),|,$(strip $(_intprops_names)))
# Prohibit the inclusion of intprops.h without an actual use.
sc_prohibit_intprops_without_use:
# Prohibit the inclusion of verify.h without an actual use.
sc_prohibit_verify_without_use:
@h='verify.h' \
- re='\<(verify(true|expr)?|static_assert) *\(' \
+ re='\<(verify(true|expr)?|assume|static_assert) *\(' \
$(_sc_header_without_use)
# Don't include xfreopen.h unless you use one of its functions.
halt='found unexpected prefix in a ChangeLog' \
$(_sc_search_regexp)
-# Ensure that each .c file containing a "main" function also
-# calls set_program_name.
-sc_program_name:
- @require='set_program_name *\(m?argv\[0\]\);' \
- in_vc_files='\.c$$' \
- containing='\<main *(' \
- halt='the above files do not call set_program_name' \
- $(_sc_search_regexp)
-
# Ensure that each .c file containing a "main" function also
# calls bindtextdomain.
sc_bindtextdomain:
# #if HAVE_HEADER_H that you remove, be sure that your project explicitly
# requires the gnulib module that guarantees the usability of that header.
gl_assured_headers_ = \
- cd $(gnulib_dir)/lib && echo *.in.h|sed 's/\.in\.h//g'
+ cd $(gnulib_dir)/lib && echo *.in.h|$(SED) 's/\.in\.h//g'
# Convert the list of names to upper case, and replace each space with "|".
az_ = abcdefghijklmnopqrstuvwxyz
&& perl -lne '$(gl_extract_significant_defines_)' $$f; \
done; \
) | sort -u \
- | sed 's/^/^ *# *(define|undef) */;s/$$/\\>/'
+ | $(SED) 's/^/^ *# *(define|undef) */;s/$$/\\>/'
endef
# Don't define macros that we already get from gnulib header files.
$(_sc_search_regexp)
# Don't use Texinfo's @acronym{}.
-# http://lists.gnu.org/archive/html/bug-gnulib/2010-03/msg00321.html
+# https://lists.gnu.org/r/bug-gnulib/2010-03/msg00321.html
texinfo_suffix_re_ ?= \.(txi|texi(nfo)?)$$
sc_texinfo_acronym:
@prohibit='@acronym\{' \
-e ' print "$$ARGV:$$n:$$v\n";' \
-e ' }'
+prohibit_doubled_words_ = \
+ the then in an on if is it but for or at and do to
+# expand the regex before running the check to avoid using expensive captures
+prohibit_doubled_word_expanded_ = \
+ $(join $(prohibit_doubled_words_),$(addprefix \s+,$(prohibit_doubled_words_)))
prohibit_doubled_word_RE_ ?= \
- /\b(then?|[iao]n|i[fst]|but|f?or|at|and|[dt]o)\s+\1\b/gims
+ /\b(?:$(subst $(_sp),|,$(prohibit_doubled_word_expanded_)))\b/gims
prohibit_doubled_word_ = \
-e 'while ($(prohibit_doubled_word_RE_))' \
$(perl_filename_lineno_text_)
# Also prohibit a prefix matching "\w+ +".
# @pxref gets the same see/also treatment and should be parenthesized;
# presume it must *not* start a sentence.
+# POSIX spells it "timestamp" rather than "time\s+stamp", so we do, too.
bad_xref_re_ ?= (?:[\w,:;] +|(?:see|also)\s+)\@xref\{
bad_pxref_re_ ?= (?:[.!?]|(?:see|also))\s+\@pxref\{
prohibit_undesirable_word_seq_RE_ ?= \
- /(?:\bcan\s+not\b|$(bad_xref_re_)|$(bad_pxref_re_))/gims
+ /(?:\bcan\s+not\b|\btime\s+stamps?\b|$(bad_xref_re_)|$(bad_pxref_re_))/gims
prohibit_undesirable_word_seq_ = \
-e 'while ($(prohibit_undesirable_word_seq_RE_))' \
$(perl_filename_lineno_text_)
| grep -vE '$(ignore_undesirable_word_sequence_RE_)' | grep . \
&& { echo '$(ME): undesirable word sequence' >&2; exit 1; } || :
+# Except for shell files and for loops, double semicolon is probably a mistake
+sc_prohibit_double_semicolon:
+ @prohibit='; *;[ {} \]*(/[/*]|$$)' \
+ in_vc_files='\.[chly]$$' \
+ exclude='\bfor *\(.*\)' \
+ halt="Double semicolon detected" \
+ $(_sc_search_regexp)
+
_ptm1 = use "test C1 && test C2", not "test C1 -''a C2"
_ptm2 = use "test C1 || test C2", not "test C1 -''o C2"
# Using test's -a and -o operators is not portable.
$(_sc_search_regexp)
NEWS_hash = \
- $$(sed -n '/^\*.* $(PREV_VERSION_REGEXP) ([0-9-]*)/,$$p' \
+ $$($(SED) -n '/^\*.* $(PREV_VERSION_REGEXP) ([0-9-]*)/,$$p' \
$(srcdir)/NEWS \
| perl -0777 -pe \
's/^Copyright.+?Free\sSoftware\sFoundation,\sInc\.\n//ms' \
| md5sum - \
- | sed 's/ .*//')
+ | $(SED) 's/ .*//')
# Ensure that we don't accidentally insert an entry into an old NEWS block.
sc_immutable_NEWS:
&& { echo '$(ME): use $$(...), not @...@' 1>&2; exit 1; } || :
news-check: NEWS
- $(AM_V_GEN)if sed -n $(news-check-lines-spec)p $< \
+ $(AM_V_GEN)if $(SED) -n $(news-check-lines-spec)p $< \
| grep -E $(news-check-regexp) >/dev/null; then \
:; \
else \
'you have changed the set of files with translatable diagnostics;\n\
apply the above patch\n'
+# Generate a list of files in which to search for translatable strings.
+perl_translatable_files_list_ = \
+ -e 'foreach $$file (@ARGV) {' \
+ -e ' \# Consider only file extensions with one or two letters' \
+ -e ' $$file =~ /\...?$$/ or next;' \
+ -e ' \# Ignore m4 and mk files' \
+ -e ' $$file =~ /\.m[4k]$$/ and next;' \
+ -e ' \# Ignore a .c or .h file with a corresponding .l or .y file' \
+ -e ' $$file =~ /(.+)\.[ch]$$/ && (-e "$${1}.l" || -e "$${1}.y")' \
+ -e ' and next;' \
+ -e ' \# Skip unreadable files' \
+ -e ' -r $$file or next;' \
+ -e ' print "$$file ";' \
+ -e '}'
+
# Verify that all source files using _() (more specifically, files that
# match $(_gl_translatable_string_re)) are listed in po/POTFILES.in.
po_file ?= $(srcdir)/po/POTFILES.in
@if test -f $(po_file); then \
grep -E -v '^(#|$$)' $(po_file) \
| grep -v '^src/false\.c$$' | sort > $@-1; \
- files=; \
- for file in $$($(VC_LIST_EXCEPT)) $(generated_files); do \
- test -r $$file || continue; \
- case $$file in \
- *.m4|*.mk) continue ;; \
- *.?|*.??) ;; \
- *) continue;; \
- esac; \
- case $$file in \
- *.[ch]) \
- base=`expr " $$file" : ' \(.*\)\..'`; \
- { test -f $$base.l || test -f $$base.y; } && continue;; \
- esac; \
- files="$$files $$file"; \
- done; \
+ files=$$(perl $(perl_translatable_files_list_) \
+ $$($(VC_LIST_EXCEPT)) $(generated_files)); \
grep -E -l '$(_gl_translatable_string_re)' $$files \
- | sed 's|^$(_dot_escaped_srcdir)/||' | sort -u > $@-2; \
+ | $(SED) 's|^$(_dot_escaped_srcdir)/||' | sort -u > $@-2; \
diff -u -L $(po_file) -L $(po_file) $@-1 $@-2 \
|| { printf '$(ME): '$(fix_po_file_diag) 1>&2; exit 1; }; \
rm -f $@-1 $@-2; \
in_vc_files=$(sample-test) \
halt='out of date copyright in $(sample-test); update it' \
$(_sc_search_regexp)
- @require='Copyright @copyright\{\} .*'$$(date +%Y)' Free' \
+ @require='Copyright @copyright\{\} .*'$$(date +%Y) \
in_vc_files=$(texi) \
halt='out of date copyright in $(texi); update it' \
$(_sc_search_regexp)
halt=$$(printf '%s\n' \
'the above files are vulnerable; beware of running' \
' "make dist*" rules, and upgrade to fixed automake' \
- ' see http://bugzilla.redhat.com/542609 for details') \
+ ' see https://bugzilla.redhat.com/show_bug.cgi?id=542609 for details') \
$(_sc_search_regexp)
sc_vulnerable_makefile_CVE-2012-3386:
halt=$$(printf '%s\n' \
'the above files are vulnerable; beware of running' \
' "make distcheck", and upgrade to fixed automake' \
- ' see http://bugzilla.redhat.com/CVE-2012-3386 for details') \
+ ' see https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-3386 for details') \
$(_sc_search_regexp)
vc-diff-check:
rel-files = $(DIST_ARCHIVES)
-gnulib_dir ?= $(srcdir)/gnulib
-gnulib-version = $$(cd $(gnulib_dir) && git describe)
+gnulib-version = $$(cd $(gnulib_dir) \
+ && { git describe || git rev-parse --short=10 HEAD; } )
bootstrap-tools ?= autoconf,automake,gnulib
+gpgv = $$(gpgv2 --version >/dev/null && echo gpgv2 || echo gpgv)
# If it's not already specified, derive the GPG key ID from
# the signed tag we've just applied to mark this release.
gpg_key_ID ?= \
$$(cd $(srcdir) \
&& git cat-file tag v$(VERSION) \
- | gpgv --status-fd 1 --keyring /dev/null - - 2>/dev/null \
+ | $(gpgv) --status-fd 1 --keyring /dev/null - - 2>/dev/null \
| awk '/^\[GNUPG:\] ERRSIG / {print $$3; exit}')
translation_project_ ?= coordinator@translationproject.org
## Updating files. ##
## ---------------- ##
-ftp-gnu = ftp://ftp.gnu.org/gnu
-www-gnu = http://www.gnu.org
+ftp-gnu = https://ftp.gnu.org/gnu
+www-gnu = https://www.gnu.org
upload_dest_dir_ ?= $(PACKAGE)
upload_command = \
&& git --version >/dev/null 2>&1; then \
cd $(srcdir) && \
git submodule --quiet foreach \
- test '"$$(git rev-parse "$$sha1")"' \
- = '"$$(git merge-base origin "$$sha1")"' \
+ 'test "$$(git rev-parse "$$sha1")" \
+ = "$$(git merge-base origin "$$sha1")"' \
|| { echo '$(ME): found non-public submodule commit' >&2; \
exit 1; }; \
else \
$(AM_V_at)$(MAKE) -s emit_upload_commands RELEASE_TYPE=$@
release:
+ $(AM_V_GEN)$(MAKE) _version
$(AM_V_GEN)$(MAKE) $(release-type)
# Override this in cfg.mk if you follow different procedures.
--highlight --frames --legend \
--title "$(PACKAGE_NAME)"
-coverage: init-coverage build-coverage gen-coverage
+coverage:
+ $(MAKE) init-coverage
+ $(MAKE) build-coverage
+ $(MAKE) gen-coverage
# Some projects carry local adjustments for gnulib modules via patches in
# a gnulib patch directory whose default name is gl/ (defined in bootstrap
test -n "$$t" && gl=$$t; \
fi; \
for diff in $$(cd $$gl; git ls-files | grep '\.diff$$'); do \
- b=$$(printf %s "$$diff"|sed 's/\.diff$$//'); \
+ b=$$(printf %s "$$diff"|$(SED) 's/\.diff$$//'); \
VERSION_CONTROL=none \
patch "$(gnulib_dir)/$$b" "$$gl/$$diff" || exit 1; \
( cd $(gnulib_dir) || exit 1; \
# Update gettext files.
PACKAGE ?= $(shell basename $(PWD))
PO_DOMAIN ?= $(PACKAGE)
-POURL = http://translationproject.org/latest/$(PO_DOMAIN)/
+POURL = https://translationproject.org/latest/$(PO_DOMAIN)/
PODIR ?= po
refresh-po:
rm -f $(PODIR)/*.po && \
wget --no-verbose --directory-prefix $(PODIR) --no-directories --recursive --level 1 --accept .po --accept .po.1 $(POURL) && \
echo 'en@boldquot' > $(PODIR)/LINGUAS && \
echo 'en@quot' >> $(PODIR)/LINGUAS && \
- ls $(PODIR)/*.po | sed 's/\.po//;s,$(PODIR)/,,' | sort >> $(PODIR)/LINGUAS
+ ls $(PODIR)/*.po | $(SED) 's/\.po//;s,$(PODIR)/,,' | \
+ sort >> $(PODIR)/LINGUAS
# Running indent once is not idempotent, but running it twice is.
INDENT_SOURCES ?= $(C_SOURCES)
# do not need to be marked. Symbols matching '__.*' are
# reserved by the compiler, so are automatically excluded below.
_gl_TS_unmarked_extern_functions ?= main usage
-_gl_TS_function_match ?= /^(?:$(_gl_TS_extern)) +.*?(\S+) *\(/
+_gl_TS_function_match ?= /^(?:$(_gl_TS_extern)) +.*?(\w+) *\(/
# If your project uses a macro like "XTERN", then put
# the following in cfg.mk to override this default:
.PHONY: _gl_tight_scope
_gl_tight_scope: $(bin_PROGRAMS)
+ sed_wrap='s/^/^_?/;s/$$/$$/'; \
t=exceptions-$$$$; \
trap 's=$$?; rm -f $$t; exit $$s' 0; \
for sig in 1 2 3 13 15; do \
test -f $$f && d= || d=$(srcdir)/; echo $$d$$f; done`; \
hdr=`for f in $(_gl_TS_headers); do \
test -f $$f && d= || d=$(srcdir)/; echo $$d$$f; done`; \
- ( printf '^%s$$\n' '__.*' $(_gl_TS_unmarked_extern_functions); \
+ ( printf '%s\n' '__.*' $(_gl_TS_unmarked_extern_functions); \
grep -h -A1 '^extern .*[^;]$$' $$src \
- | grep -vE '^(extern |--)' | sed 's/ .*//'; \
+ | grep -vE '^(extern |--|#)' | $(SED) 's/ .*//; /^$$/d'; \
perl -lne \
- '$(_gl_TS_function_match) and print "^$$1\$$"' $$hdr; \
- ) | sort -u > $$t; \
- nm -e $(_gl_TS_obj_files) | sed -n 's/.* T //p'|grep -Ev -f $$t \
+ '$(_gl_TS_function_match) and print $$1' $$hdr; \
+ ) | sort -u | $(SED) "$$sed_wrap" > $$t; \
+ nm -g $(_gl_TS_obj_files)|$(SED) -n 's/.* T //p'|grep -Ev -f $$t \
&& { echo the above functions should have static scope >&2; \
exit 1; } || : ; \
- ( printf '^%s$$\n' '__.*' $(_gl_TS_unmarked_extern_vars); \
- perl -lne '$(_gl_TS_var_match) and print "^$$1\$$"' \
+ ( printf '%s\n' '__.*' main $(_gl_TS_unmarked_extern_vars); \
+ perl -lne '$(_gl_TS_var_match) and print $$1' \
$$hdr $(_gl_TS_other_headers) \
- ) | sort -u > $$t; \
- nm -e $(_gl_TS_obj_files) | sed -n 's/.* [BCDGRS] //p' \
+ ) | sort -u | $(SED) "$$sed_wrap" > $$t; \
+ nm -g $(_gl_TS_obj_files) | $(SED) -n 's/.* [BCDGRS] //p' \
| sort -u | grep -Ev -f $$t \
&& { echo the above variables should have static scope >&2; \
exit 1; } || :
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