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[PATCH 5/7] maint.mk: update from gnulib


From: Jim Meyering
Subject: [PATCH 5/7] maint.mk: update from gnulib
Date: Sat, 21 Jan 2012 12:14:57 +0100

From: Jim Meyering <address@hidden>

---
 maint.mk | 1526 +++++++++++++++++++++++++++++++++++++++++++++++---------------
 1 files changed, 1172 insertions(+), 354 deletions(-)

diff --git a/maint.mk b/maint.mk
index e1a963a..ad6aac7 100644
--- a/maint.mk
+++ b/maint.mk
@@ -1,6 +1,6 @@
 # -*-Makefile-*-
 # This Makefile fragment tries to be general-purpose enough to be
-# used by at least coreutils, idutils, CPPI, Bison, and Autoconf.
+# used by many projects via the gnulib maintainer-makefile module.

 ## Copyright (C) 2001-2012 Free Software Foundation, Inc.
 ##
@@ -21,8 +21,12 @@
 # ME := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
 ME := maint.mk

-# Override this in cfg.mk if you use a non-standard build-aux directory.
-build_aux ?= $(srcdir)/build-aux
+# Diagnostic for continued use of deprecated variable.
+# Remove in 2013
+ifneq ($(build_aux),)
+ $(error "$(ME): \
+set $$(_build-aux) relative to $$(srcdir) instead of $$(build_aux)")
+endif

 # Do not save the original name or timestamp in the .tar.gz file.
 # Use --rsyncable if available.
@@ -33,16 +37,37 @@ GZIP_ENV = '--no-name --best $(gzip_rsyncable)'

 GIT = git
 VC = $(GIT)
-VC-tag = git tag -s -m '$(VERSION)' -u '$(gpg_key_ID)'

-VC_LIST = $(build_aux)/vc-list-files -C $(srcdir)
+VC_LIST = $(srcdir)/$(_build-aux)/vc-list-files -C $(srcdir)
+
+# You can override this variable in cfg.mk to set your own regexp
+# matching files to ignore.
+VC_LIST_ALWAYS_EXCLUDE_REGEX ?= ^$$

+# This is to preprocess robustly the output of $(VC_LIST), so that even
+# when $(srcdir) is a pathological name like "....", the leading sed command
+# removes only the intended prefix.
+_dot_escaped_srcdir = $(subst .,\.,$(srcdir))
+
+# Post-process $(VC_LIST) output, prepending $(srcdir)/, but only
+# when $(srcdir) is not ".".
+ifeq ($(srcdir),.)
+_prepend_srcdir_prefix =
+else
+_prepend_srcdir_prefix = | sed 's|^|$(srcdir)/|'
+endif
+
+# In order to be able to consistently filter "."-relative names,
+# (i.e., with no $(srcdir) prefix), this definition is careful to
+# remove any $(srcdir) prefix, and to restore what it removes.
+_sc_excl = \
+  $(if $(exclude_file_name_regexp--$@),$(exclude_file_name_regexp--$@),^$$)
 VC_LIST_EXCEPT = \
-  $(VC_LIST) | if test -f $(srcdir)/.x-$@; then        \
-    grep -vEf $(srcdir)/.x-$@;                 \
-  else                                         \
-    grep -v ChangeLog;                         \
-  fi
+  $(VC_LIST) | sed 's|^$(_dot_escaped_srcdir)/||' \
+       | if test -f $(srcdir)/.x-$@; then grep -vEf $(srcdir)/.x-$@; \
+         else grep -Ev -e "$${VC_LIST_EXCEPT_DEFAULT-ChangeLog}"; fi \
+       | grep -Ev -e '($(VC_LIST_ALWAYS_EXCLUDE_REGEX)|$(_sc_excl))' \
+       $(_prepend_srcdir_prefix)

 ifeq ($(origin prev_version_file), undefined)
   prev_version_file = $(srcdir)/.prev-version
@@ -52,12 +77,18 @@ PREV_VERSION := $(shell cat $(prev_version_file) 
2>/dev/null)
 VERSION_REGEXP = $(subst .,\.,$(VERSION))
 PREV_VERSION_REGEXP = $(subst .,\.,$(PREV_VERSION))

+ifeq ($(VC),$(GIT))
 this-vc-tag = v$(VERSION)
 this-vc-tag-regexp = v$(VERSION_REGEXP)
+else
+tag-package = $(shell echo "$(PACKAGE)" | tr '[:lower:]' '[:upper:]')
+tag-this-version = $(subst .,_,$(VERSION))
+this-vc-tag = $(tag-package)-$(tag-this-version)
+this-vc-tag-regexp = $(this-vc-tag)
+endif
 my_distdir = $(PACKAGE)-$(VERSION)

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

 # Override gnu_rel_host and url_dir_list in cfg.mk if these are not right.
@@ -74,115 +105,307 @@ else
 url_dir_list ?= ftp://$(gnu_rel_host)/gnu/$(PACKAGE)
 endif

+# Override this in cfg.mk if you are using a different format in your
+# NEWS file.
+today = $(shell date +%Y-%m-%d)
+
+# Select which lines of NEWS are searched for $(news-check-regexp).
+# This is a sed line number spec.  The default says that we search
+# lines 1..10 of NEWS for $(news-check-regexp).
+# If you want to search only line 3 or only lines 20-22, use "3" or "20,22".
+news-check-lines-spec ?= 1,10
+news-check-regexp ?= '^\*.* $(VERSION_REGEXP) \($(today)\)'
+
 # 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.  ##
 ## --------------- ##

-# Collect the names of rules starting with `sc_'.
-syntax-check-rules := $(shell sed -n 's/^\(sc_[a-zA-Z0-9_-]*\):.*/\1/p' \
-                       $(srcdir)/$(ME))
+_cfg_mk := $(shell test -f $(srcdir)/cfg.mk && echo '$(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)))
 .PHONY: $(syntax-check-rules)

-local-checks-available = \
-  po-check copyright-check writable-files m4-check author_mark_check \
-  changelog-check patch-check strftime-check $(syntax-check-rules) \
-  makefile_path_separator_check \
-  makefile-check check-AUTHORS
+ifeq ($(shell $(VC_LIST) >/dev/null 2>&1; echo $$?),0)
+local-checks-available += $(syntax-check-rules)
+else
+local-checks-available += no-vc-detected
+no-vc-detected:
+       @echo "No version control files detected; skipping syntax check"
+endif
 .PHONY: $(local-checks-available)

-local-check := $(filter-out $(local-checks-to-skip), $(local-checks-available))
+# Arrange to print the name of each syntax-checking rule just before running 
it.
+$(syntax-check-rules): %: %.m
+sc_m_rules_ = $(patsubst %, %.m, $(syntax-check-rules))
+.PHONY: $(sc_m_rules_)
+$(sc_m_rules_):
+       @echo $(patsubst sc_%.m, %, $@)
+       @date +%s.%N > .sc-start-$(basename $@)
+
+# Compute and print the elapsed time for each syntax-check rule.
+sc_z_rules_ = $(patsubst %, %.z, $(syntax-check-rules))
+.PHONY: $(sc_z_rules_)
+$(sc_z_rules_): %.z: %
+       @end=$$(date +%s.%N);                                           \
+       start=$$(cat .sc-start-$*);                                     \
+       rm -f .sc-start-$*;                                             \
+       awk -v s=$$start -v e=$$end                                     \
+         'END {printf "%.2f $(patsubst sc_%,%,$*)\n", e - s}' < /dev/null
+
+# The patsubst here is to replace each sc_% rule with its sc_%.z wrapper
+# that computes and prints elapsed time.
+local-check :=                                                         \
+  $(patsubst sc_%, sc_%.z,                                             \
+    $(filter-out $(local-checks-to-skip), $(local-checks-available)))

 syntax-check: $(local-check)
-#      @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>'                    \
-#          $(srcdir)/{lib,src}/*.[chly] /dev/null &&                   \
-#        { echo '$(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;             \
+# _sc_search_regexp
+#
+# This macro searches for a given construct in the selected files and
+# then takes some action.
+#
+# Parameters (shell variables):
+#
+#  prohibit | require
+#
+#     Regular expression (ERE) denoting either a forbidden construct
+#     or a required construct.  Those arguments are exclusive.
+#
+#  in_vc_files | in_files
+#
+#     grep-E-style regexp denoting the files to check.  If no files
+#     are specified the default are all the files that are under
+#     version control.
+#
+#  containing | non_containing
+#
+#     Select the files (non) containing strings matching this regexp.
+#     If both arguments are specified then CONTAINING takes
+#     precedence.
+#
+#  with_grep_options
+#
+#     Extra options for grep.
+#
+#  ignore_case
+#
+#     Ignore case.
+#
+#  halt
+#
+#     Message to display before to halting execution.
+#
+# Finally, you may exempt files based on an ERE matching file names.
+# For example, to exempt from the sc_space_tab check all files with the
+# .diff suffix, set this Make variable:
+#
+# exclude_file_name_regexp--sc_space_tab = \.diff$
+#
+# Note that while this functionality is mostly inherited via VC_LIST_EXCEPT,
+# when filtering by name via in_files, we explicitly filter out matching
+# names here as well.
+
+# By default, _sc_search_regexp does not ignore case.
+export ignore_case =
+_ignore_case = $$(test -n "$$ignore_case" && printf %s -i || :)
+
+define _sc_say_and_exit
+   dummy=; : so we do not need a semicolon before each use;            \
+   { printf '%s\n' "$(ME): $$msg" 1>&2; exit 1; };
+endef
+
+define _sc_search_regexp
+   dummy=; : so we do not need a semicolon before each use;            \
+                                                                       \
+   : Check arguments;                                                  \
+   test -n "$$prohibit" && test -n "$$require"                         \
+     && { msg='Cannot specify both prohibit and require'               \
+          $(_sc_say_and_exit) } || :;                                  \
+   test -z "$$prohibit" && test -z "$$require"                         \
+     && { msg='Should specify either prohibit or require'              \
+          $(_sc_say_and_exit) } || :;                                  \
+   test -n "$$in_vc_files" && test -n "$$in_files"                     \
+     && { msg='Cannot specify both in_vc_files and in_files'           \
+          $(_sc_say_and_exit) } || :;                                  \
+   test "x$$halt" != x                                                 \
+     || { msg='halt not defined' $(_sc_say_and_exit) };                        
\
+                                                                       \
+   : Filter by file name;                                              \
+   if test -n "$$in_files"; then                                       \
+     files=$$(find $(srcdir) | grep -E "$$in_files"                    \
+              | grep -Ev '$(exclude_file_name_regexp--$@)');           \
+   else                                                                        
\
+     files=$$($(VC_LIST_EXCEPT));                                      \
+     if test -n "$$in_vc_files"; then                                  \
+       files=$$(echo "$$files" | grep -E "$$in_vc_files");             \
+     fi;                                                               \
+   fi;                                                                 \
+                                                                       \
+   : Filter by content;                                                        
\
+   test -n "$$files" && test -n "$$containing"                         \
+     && { files=$$(grep -l "$$containing" $$files); } || :;            \
+   test -n "$$files" && test -n "$$non_containing"                     \
+     && { files=$$(grep -vl "$$non_containing" $$files); } || :;       \
+                                                                       \
+   : Check for the construct;                                          \
+   if test -n "$$files"; then                                          \
+     if test -n "$$prohibit"; then                                     \
+       grep $$with_grep_options $(_ignore_case) -nE "$$prohibit" $$files \
+         && { msg="$$halt" $(_sc_say_and_exit) } || :;                 \
+     else                                                              \
+       grep $$with_grep_options $(_ignore_case) -LE "$$require" $$files \
+           | grep .                                                    \
+         && { msg="$$halt" $(_sc_say_and_exit) } || :;                 \
+     fi                                                                        
\
+   else :;                                                             \
+   fi || :;
+endef
+
+sc_avoid_if_before_free:
+       @$(srcdir)/$(_build-aux)/useless-if-before-free                 \
+               $(useless_free_options)                                 \
+           $$($(VC_LIST_EXCEPT) | grep -v useless-if-before-free) &&   \
+         { echo '$(ME): found useless "if" before "free" above' 1>&2;  \
            exit 1; } || :

+sc_cast_of_argument_to_free:
+       @prohibit='\<free *\( *\(' halt='don'\''t cast free argument'   \
+         $(_sc_search_regexp)
+
 sc_cast_of_x_alloc_return_value:
-       @shopt -s nullglob;                                             \
-       grep -nE --exclude=$(srcdir)/lib/regex.c                        \
-           '\*\) *x(m|c|re)alloc\>'                                    \
-           $(srcdir)/{lib,src}/*.[chly] /dev/null &&                   \
-         { echo '$(ME): don'\''t cast x*alloc return value' 1>&2;      \
-           exit 1; } || :
+       @prohibit='\*\) *x(m|c|re)alloc\>'                              \
+       halt='don'\''t cast x*alloc return value'                       \
+         $(_sc_search_regexp)

 sc_cast_of_alloca_return_value:
-       @shopt -s nullglob;                                             \
-       grep -nE '\*\) *alloca\>'                                       \
-           $(srcdir)/src/*.[chly] /dev/null &&                         \
-         { echo '$(ME): don'\''t cast alloca return value' 1>&2;       \
-           exit 1; } || :
+       @prohibit='\*\) *alloca\>'                                      \
+       halt='don'\''t cast alloca return value'                        \
+         $(_sc_search_regexp)

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

-# Don't use *scanf or the old ato* functions in `real' code.
+# Don't use *scanf or the old ato* functions in "real" code.
 # They provide no error checking mechanism.
 # Instead, use strto* functions.
 sc_prohibit_atoi_atof:
-       @grep -nE '\<([fs]?scanf|ato([filq]|ll))\>' $$($(VC_LIST_EXCEPT)) && \
-         { echo '$(ME): do not use *scan''f, ato''f, ato''i, ato''l, ato''ll, 
ato''q, or ss''canf'     \
+       @prohibit='\<([fs]?scanf|ato([filq]|ll)) *\('                           
\
+       halt='do not use *scan''f, ato''f, ato''i, ato''l, ato''ll or ato''q'   
\
+         $(_sc_search_regexp)
+
+# Use STREQ rather than comparing strcmp == 0, or != 0.
+sc_prohibit_strcmp:
+       @grep -nE '! *str''cmp *\(|\<str''cmp *\(.+\) *[!=]='   \
+           $$($(VC_LIST_EXCEPT))                                       \
+         | grep -vE ':# *define STRN?EQ\(' &&                          \
+         { echo '$(ME): replace str''cmp calls above with STREQ/STRNEQ' \
                1>&2; exit 1; } || :

+# Pass EXIT_*, not number, to usage, exit, and error (when exiting)
+# Convert all uses automatically, via these two commands:
+# git grep -l '\<exit *(1)' \
+#  | grep -vEf .x-sc_prohibit_magic_number_exit \
+#  | xargs --no-run-if-empty \
+#      perl -pi -e 's/(^|[^.])\b(exit ?)\(1\)/$1$2(EXIT_FAILURE)/'
+# git grep -l '\<exit *(0)' \
+#  | grep -vEf .x-sc_prohibit_magic_number_exit \
+#  | xargs --no-run-if-empty \
+#      perl -pi -e 's/(^|[^.])\b(exit ?)\(0\)/$1$2(EXIT_SUCCESS)/'
+sc_prohibit_magic_number_exit:
+       @prohibit='(^|[^.])\<(usage|exit) ?\([0-9]|\<error ?\([1-9][0-9]*,'     
\
+       halt='use EXIT_* values rather than magic number'                       
\
+         $(_sc_search_regexp)
+
 # Using EXIT_SUCCESS as the first argument to error is misleading,
-# since when that parameter is 0, error does not exit.  Use `0' instead.
+# 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;               \
+       @prohibit='error *\(EXIT_SUCCESS,'                              \
+       in_vc_files='\.[chly]$$'                                        \
+       halt='found error (EXIT_SUCCESS'                                \
+        $(_sc_search_regexp)
+
+# "FATAL:" should be fully upper-cased in error messages
+# "WARNING:" should be fully upper-cased, or fully lower-cased
+sc_error_message_warn_fatal:
+       @grep -nEA2 '[^rp]error *\(' $$($(VC_LIST_EXCEPT))              \
+           | grep -E '"Warning|"Fatal|"fatal' &&                       \
+         { echo '$(ME): use FATAL, WARNING or warning' 1>&2;           \
            exit 1; } || :

-sc_file_system:
-       @grep -ni 'file''system' $$($(VC_LIST_EXCEPT))                  \
-         | grep -v 'File''system Hierarchy Standard' &&                \
-         { echo '$(ME): found use of "file''system";'                  \
-           'rewrite to use "file system"' 1>&2;                        \
+# Error messages should not start with a capital letter
+sc_error_message_uppercase:
+       @grep -nEA2 '[^rp]error *\(' $$($(VC_LIST_EXCEPT))              \
+           | grep -E '"[A-Z]'                                          \
+           | grep -vE '"FATAL|"WARNING|"Java|"C#|PRIuMAX' &&           \
+         { echo '$(ME): found capitalized error message' 1>&2;         \
            exit 1; } || :

-sc_no_have_config_h:
-       @grep -n '^# *if.*HAVE''_CONFIG_H' $$($(VC_LIST_EXCEPT)) &&     \
-         { echo '$(ME): found use of HAVE''_CONFIG_H; remove'          \
-               1>&2; exit 1; } || :
+# Error messages should not end with a period
+sc_error_message_period:
+       @grep -nEA2 '[^rp]error *\(' $$($(VC_LIST_EXCEPT))              \
+           | grep -E '[^."]\."' &&                                     \
+         { echo '$(ME): found error message ending in period' 1>&2;    \
+           exit 1; } || :

-# Nearly all .c files must include <config.h>.
+sc_file_system:
+       @prohibit=file''system                                          \
+       ignore_case=1                                                   \
+       halt='found use of "file''system"; spell it "file system"'      \
+         $(_sc_search_regexp)
+
+# Don't use cpp tests of this symbol.  All code assumes config.h is included.
+sc_prohibit_have_config_h:
+       @prohibit='^# *if.*HAVE''_CONFIG_H'                             \
+       halt='found use of HAVE''_CONFIG_H; remove'                     \
+         $(_sc_search_regexp)
+
+# Nearly all .c files must include <config.h>.  However, we also permit this
+# via inclusion of a package-specific header, if cfg.mk specified one.
+# config_h_header must be suitable for grep -E.
+config_h_header ?= <config\.h>
 sc_require_config_h:
-       @if $(VC_LIST_EXCEPT) | grep '\.c$$' > /dev/null; then          \
-         grep -L '^# *include <config\.h>'                             \
-               $$($(VC_LIST_EXCEPT) | grep '\.c$$')                    \
-             | grep . &&                                               \
-         { echo '$(ME): the above files do not include <config.h>'     \
-               1>&2; exit 1; } || :;                                   \
+       @require='^# *include $(config_h_header)'                       \
+       in_vc_files='\.c$$'                                             \
+       halt='the above files do not include <config.h>'                \
+         $(_sc_search_regexp)
+
+# 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 &&                                            \
+           { echo '$(ME): the above files include some other header'   \
+               'before <config.h>' 1>&2; exit 1; } || :;               \
        else :;                                                         \
        fi

+sc_prohibit_HAVE_MBRTOWC:
+       @prohibit='\bHAVE_MBRTOWC\b'                                    \
+       halt="do not use $$prohibit; it is always defined"              \
+         $(_sc_search_regexp)
+
 # To use this "command" macro, you must first define two shell variables:
-# h: the header, enclosed in <> or ""
+# h: the header name, with no enclosing <> or ""
 # re: a regular expression that matches IFF something provided by $h is used.
-define _header_without_use
-  h_esc=`echo "$$h"|sed 's/\./\\./'`;                                  \
-  if $(VC_LIST_EXCEPT) | grep '\.c$$' > /dev/null; then                        
\
+define _sc_header_without_use
+  dummy=; : so we do not need a semicolon before each use;             \
+  h_esc=`echo '[<"]'"$$h"'[">]'|sed 's/\./\\\\./g'`;                   \
+  if $(VC_LIST_EXCEPT) | grep -l '\.c$$' > /dev/null; then             \
     files=$$(grep -l '^# *include '"$$h_esc"                           \
             $$($(VC_LIST_EXCEPT) | grep '\.c$$')) &&                   \
     grep -LE "$$re" $$files | grep . &&                                        
\
@@ -194,194 +417,567 @@ endef

 # Prohibit the inclusion of assert.h without an actual use of assert.
 sc_prohibit_assert_without_use:
-       @h='<assert.h>' re='\<assert *\(' $(_header_without_use)
+       @h='assert.h' re='\<assert *\(' $(_sc_header_without_use)
+
+# Prohibit the inclusion of close-stream.h without an actual use.
+sc_prohibit_close_stream_without_use:
+       @h='close-stream.h' re='\<close_stream *\(' $(_sc_header_without_use)

 # Prohibit the inclusion of getopt.h without an actual use.
 sc_prohibit_getopt_without_use:
-       @h='<getopt.h>' re='\<getopt(_long)? *\(' $(_header_without_use)
+       @h='getopt.h' re='\<getopt(_long)? *\(' $(_sc_header_without_use)

 # Don't include quotearg.h unless you use one of its functions.
 sc_prohibit_quotearg_without_use:
-       @h='"quotearg.h"' re='\<quotearg(_[^ ]+)? *\(' $(_header_without_use)
+       @h='quotearg.h' re='\<quotearg(_[^ ]+)? *\(' $(_sc_header_without_use)

 # Don't include quote.h unless you use one of its functions.
 sc_prohibit_quote_without_use:
-       @h='"quote.h"' re='\<quote(_n)? *\(' $(_header_without_use)
+       @h='quote.h' re='\<quote(_n)? *\(' $(_sc_header_without_use)

 # Don't include this header unless you use one of its functions.
 sc_prohibit_long_options_without_use:
-       @h='"long-options.h"' re='\<parse_long_options *\(' \
-         $(_header_without_use)
+       @h='long-options.h' re='\<parse_long_options *\(' \
+         $(_sc_header_without_use)

 # Don't include this header unless you use one of its functions.
 sc_prohibit_inttostr_without_use:
-       @h='"inttostr.h"' re='\<(off|[iu]max|uint)tostr *\(' \
-         $(_header_without_use)
+       @h='inttostr.h' re='\<(off|[iu]max|uint)tostr *\(' \
+         $(_sc_header_without_use)
+
+# Don't include this header unless you use one of its functions.
+sc_prohibit_ignore_value_without_use:
+       @h='ignore-value.h' re='\<ignore_(value|ptr) *\(' \
+         $(_sc_header_without_use)

 # Don't include this header unless you use one of its functions.
 sc_prohibit_error_without_use:
-       @h='"error.h"' \
+       @h='error.h' \
        re='\<error(_at_line|_print_progname|_one_per_line|_message_count)? 
*\('\
-         $(_header_without_use)
+         $(_sc_header_without_use)
+
+# Don't include xalloc.h unless you use one of its functions.
+# Consider these symbols:
+# perl -lne '/^# *define (\w+)\(/ and print $1' lib/xalloc.h|grep -v '^__';
+# perl -lne '/^(?:extern )?(?:void|char) \*?(\w+) *\(/ and print $1' 
lib/xalloc.h
+# Divide into two sets on case, and filter each through this:
+# | sort | perl -MRegexp::Assemble -le \
+#  'print Regexp::Assemble->new(file => "/dev/stdin")->as_string'|sed 
's/\?://g'
+# Note this was produced by the above:
+# _xa1 = \
+#x(((2n?)?re|c(har)?|n(re|m)|z)alloc|alloc_(oversized|die)|m(alloc|emdup)|strdup)
+# But we can do better, in at least two ways:
+# 1) take advantage of two "dup"-suffixed strings:
+# x(((2n?)?re|c(har)?|n(re|m)|[mz])alloc|alloc_(oversized|die)|(mem|str)dup)
+# 2) notice that "c(har)?|[mz]" is equivalent to the shorter and more readable
+# "char|[cmz]"
+# x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
+_xa1 = x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
+_xa2 = X([CZ]|N?M)ALLOC
+sc_prohibit_xalloc_without_use:
+       @h='xalloc.h' \
+       re='\<($(_xa1)|$(_xa2)) *\('\
+         $(_sc_header_without_use)
+
+# Extract function names:
+# perl -lne '/^(?:extern )?(?:void|char) \*?(\w+) *\(/ and print $1' lib/hash.h
+_hash_re = \
+clear|delete|free|get_(first|next)|insert|lookup|print_statistics|reset_tuning
+_hash_fn = \<($(_hash_re)) *\(
+_hash_struct = (struct )?\<[Hh]ash_(table|tuning)\>
+sc_prohibit_hash_without_use:
+       @h='hash.h' \
+       re='$(_hash_fn)|$(_hash_struct)'\
+         $(_sc_header_without_use)
+
+sc_prohibit_cloexec_without_use:
+       @h='cloexec.h' re='\<(set_cloexec_flag|dup_cloexec) *\(' \
+         $(_sc_header_without_use)
+
+sc_prohibit_posixver_without_use:
+       @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)
+
+sc_prohibit_hash_pjw_without_use:
+       @h='hash-pjw.h' \
+       re='\<hash_pjw *\(' \
+         $(_sc_header_without_use)

 sc_prohibit_safe_read_without_use:
-       @h='"safe-read.h"' re='(\<SAFE_READ_ERROR\>|\<safe_read *\()' \
-         $(_header_without_use)
+       @h='safe-read.h' re='(\<SAFE_READ_ERROR\>|\<safe_read *\()' \
+         $(_sc_header_without_use)

 sc_prohibit_argmatch_without_use:
-       @h='"argmatch.h"' \
-       
re='(\<(ARRAY_CARDINALITY|X?ARGMATCH(|_TO_ARGUMENT|_VERIFY))\>|\<argmatch(_exit_fn|_(in)?valid)
 *\()' \
-         $(_header_without_use)
+       @h='argmatch.h' \
+       
re='(\<(ARRAY_CARDINALITY|X?ARGMATCH(|_TO_ARGUMENT|_VERIFY))\>|\<(invalid_arg|argmatch(_exit_fn|_(in)?valid)?)
 *\()' \
+         $(_sc_header_without_use)
+
+sc_prohibit_canonicalize_without_use:
+       @h='canonicalize.h' \
+       
re='CAN_(EXISTING|ALL_BUT_LAST|MISSING)|canonicalize_(mode_t|filename_mode)' \
+         $(_sc_header_without_use)

 sc_prohibit_root_dev_ino_without_use:
-       @h='"root-dev-ino.h"' \
+       @h='root-dev-ino.h' \
        re='(\<ROOT_DEV_INO_(CHECK|WARN)\>|\<get_root_dev_ino *\()' \
-         $(_header_without_use)
+         $(_sc_header_without_use)
+
+sc_prohibit_openat_without_use:
+       @h='openat.h' \
+       
re='\<(openat_(permissive|needs_fchdir|(save|restore)_fail)|l?(stat|ch(own|mod))at|(euid)?accessat)\>'
 \
+         $(_sc_header_without_use)
+
+# Prohibit the inclusion of c-ctype.h without an actual use.
+ctype_re = isalnum|isalpha|isascii|isblank|iscntrl|isdigit|isgraph|islower\
+|isprint|ispunct|isspace|isupper|isxdigit|tolower|toupper
+sc_prohibit_c_ctype_without_use:
+       @h='c-ctype.h' re='\<c_($(ctype_re)) *\(' \
+         $(_sc_header_without_use)
+
+_empty =
+_sp = $(_empty) $(_empty)
+# The following list was generated by running:
+# man signal.h|col -b|perl -ne '/bsd_signal.*;/.../sigwaitinfo.*;/ and print' \
+#   | perl -lne '/^\s+(?:int|void).*?(\w+).*/ and print $1' | fmt
+_sig_functions = \
+  bsd_signal kill killpg pthread_kill pthread_sigmask raise sigaction \
+  sigaddset sigaltstack sigdelset sigemptyset sigfillset sighold sigignore \
+  siginterrupt sigismember signal sigpause sigpending sigprocmask sigqueue \
+  sigrelse sigset sigsuspend sigtimedwait sigwait sigwaitinfo
+_sig_function_re = $(subst $(_sp),|,$(strip $(_sig_functions)))
+# The following were extracted from "man signal.h" manually.
+_sig_types_and_consts =                                                        
\
+  MINSIGSTKSZ SA_NOCLDSTOP SA_NOCLDWAIT SA_NODEFER SA_ONSTACK          \
+  SA_RESETHAND SA_RESTART SA_SIGINFO SIGEV_NONE SIGEV_SIGNAL           \
+  SIGEV_THREAD SIGSTKSZ SIG_BLOCK SIG_SETMASK SIG_UNBLOCK SS_DISABLE   \
+  SS_ONSTACK mcontext_t pid_t sig_atomic_t sigevent siginfo_t sigset_t \
+  sigstack sigval stack_t ucontext_t
+# generated via this:
+# perl -lne '/^#ifdef (SIG\w+)/ and print $1' lib/sig2str.c|sort -u|fmt -70
+_sig_names =                                                           \
+  SIGABRT SIGALRM SIGALRM1 SIGBUS SIGCANCEL SIGCHLD SIGCLD SIGCONT     \
+  SIGDANGER SIGDIL SIGEMT SIGFPE SIGFREEZE SIGGRANT SIGHUP SIGILL      \
+  SIGINFO SIGINT SIGIO SIGIOT SIGKAP SIGKILL SIGKILLTHR SIGLOST SIGLWP \
+  SIGMIGRATE SIGMSG SIGPHONE SIGPIPE SIGPOLL SIGPRE SIGPROF SIGPWR     \
+  SIGQUIT SIGRETRACT SIGSAK SIGSEGV SIGSOUND SIGSTKFLT SIGSTOP SIGSYS  \
+  SIGTERM SIGTHAW SIGTRAP SIGTSTP SIGTTIN SIGTTOU SIGURG SIGUSR1       \
+  SIGUSR2 SIGVIRT SIGVTALRM SIGWAITING SIGWINCH SIGWIND SIGWINDOW      \
+  SIGXCPU SIGXFSZ
+_sig_syms_re = $(subst $(_sp),|,$(strip $(_sig_names) 
$(_sig_types_and_consts)))
+
+# Prohibit the inclusion of signal.h without an actual use.
+sc_prohibit_signal_without_use:
+       @h='signal.h'                                                   \
+       re='\<($(_sig_function_re)) *\(|\<($(_sig_syms_re))\>'          \
+         $(_sc_header_without_use)
+
+# Don't include stdio--.h unless you use one of its functions.
+sc_prohibit_stdio--_without_use:
+       @h='stdio--.h' re='\<((f(re)?|p)open|tmpfile) *\('              \
+         $(_sc_header_without_use)
+
+# Don't include stdio-safer.h unless you use one of its functions.
+sc_prohibit_stdio-safer_without_use:
+       @h='stdio-safer.h' re='\<((f(re)?|p)open|tmpfile)_safer *\('    \
+         $(_sc_header_without_use)
+
+# Prohibit the inclusion of strings.h without a sensible use.
+# Using the likes of bcmp, bcopy, bzero, index or rindex is not sensible.
+sc_prohibit_strings_without_use:
+       @h='strings.h'                                                  \
+       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
+_intprops_syms_re = $(subst $(_sp),|,$(strip $(_intprops_names)))
+# Prohibit the inclusion of intprops.h without an actual use.
+sc_prohibit_intprops_without_use:
+       @h='intprops.h'                                                 \
+       re='\<($(_intprops_syms_re)) *\('                               \
+         $(_sc_header_without_use)
+
+_stddef_syms_re = NULL|offsetof|ptrdiff_t|size_t|wchar_t
+# Prohibit the inclusion of stddef.h without an actual use.
+sc_prohibit_stddef_without_use:
+       @h='stddef.h'                                                   \
+       re='\<($(_stddef_syms_re))\>'                                   \
+         $(_sc_header_without_use)
+
+_de1 = dirfd|(close|(fd)?open|read|rewind|seek|tell)dir(64)?(_r)?
+_de2 = (versionsort|struct dirent|getdirentries|alphasort|scandir(at)?)(64)?
+_de3 = MAXNAMLEN|DIR|ino_t|d_ino|d_fileno|d_namlen
+_dirent_syms_re = $(_de1)|$(_de2)|$(_de3)
+# Prohibit the inclusion of dirent.h without an actual use.
+sc_prohibit_dirent_without_use:
+       @h='dirent.h'                                                   \
+       re='\<($(_dirent_syms_re))\>'                                   \
+         $(_sc_header_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) *\('                   \
+         $(_sc_header_without_use)
+
+# Don't include xfreopen.h unless you use one of its functions.
+sc_prohibit_xfreopen_without_use:
+       @h='xfreopen.h' re='\<xfreopen *\(' $(_sc_header_without_use)

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

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

-# Each nonempty line must start with a year number, or a TAB.
+# Each nonempty ChangeLog line must start with a year number, or a TAB.
 sc_changelog:
-       @grep -n '^[^12 ]' $$(find $(srcdir) -maxdepth 2 -name ChangeLog) && \
-         { echo '$(ME): found unexpected prefix in a ChangeLog' 1>&2;  \
-           exit 1; } || :
-
-# Ensure that dd's definition of LONGEST_SYMBOL stays in sync
-# with the strings from the two affected variables.
-dd_c = $(srcdir)/src/dd.c
-sc_dd_max_sym_length:
-ifneq ($(wildcard $(dd_c)),)
-       @len=$$( (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" = "$$max"; then :; else                 \
-         echo 'dd.c: LONGEST_SYMBOL is not longest' 1>&2;      \
-         exit 1;                                               \
-       fi
-endif
-
-# Many m4 macros names once began with `jm_'.
-# On 2004-04-13, they were all changed to start with gl_ instead.
-# Make sure that none are inadvertently reintroduced.
-sc_prohibit_jm_in_m4:
-       @grep -nE 'jm_[A-Z]'                                    \
-               $$($(VC_LIST) m4 |grep '\.m4$$') &&             \
-           { echo '$(ME): do not use jm_ in m4 macro names'    \
-             1>&2; exit 1; } || :
-
-sc_root_tests:
-       @t1=sc-root.expected; t2=sc-root.actual;                        \
-       grep -nl '^PRIV_CHECK_ARG=require-root'                         \
-         $$($(VC_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; } || :
-
-# Files in src/ should not include directly any of
-# the headers already included via system.h.
-sc_system_h_headers:
-       @if test -f $(srcdir)/src/system.h; then                        \
-         pat=$$(                                                       \
-           sed -n '/^# *include /s///p' $(srcdir)/src/system.h /dev/null \
-           | grep -Ev 'sys/(param|file)\.h'                            \
-           | sed 's/ .*//;;s/^["<]/^# *include [<"]/;s/\.h[">]$$/\\.h[">]/' \
-         ) &&                                                          \
-         grep -nE -f "$pat"                                            \
-             $$($(VC_LIST) src |                                       \
-                grep -Ev '((copy|system)\.h|parse-gram\.c)$$')         \
-           && { echo '$(ME): the above are already included via system.h'\
-                 1>&2;  exit 1; } || :;                                \
+       @prohibit='^[^12        ]'                                      \
+       in_vc_files='^ChangeLog$$'                                      \
+       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:
+       @require='bindtextdomain *\('                                   \
+       in_vc_files='\.c$$'                                             \
+       containing='\<main *('                                          \
+       halt='the above files do not call bindtextdomain'               \
+         $(_sc_search_regexp)
+
+# Require that the final line of each test-lib.sh-using test be this one:
+# Exit $fail
+# Note: this test requires GNU grep's --label= option.
+Exit_witness_file ?= tests/test-lib.sh
+Exit_base := $(notdir $(Exit_witness_file))
+sc_require_test_exit_idiom:
+       @if test -f $(srcdir)/$(Exit_witness_file); then                \
+         die=0;                                                        \
+         for i in $$(grep -l -F 'srcdir/$(Exit_base)'                  \
+               $$($(VC_LIST) tests)); do                               \
+           tail -n1 $$i | grep '^Exit .' > /dev/null                   \
+             && : || { die=1; echo $$i; }                              \
+         done;                                                         \
+         test $$die = 1 &&                                             \
+           { echo 1>&2 '$(ME): the final line in each of the above is not:'; \
+             echo 1>&2 'Exit something';                               \
+             exit 1; } || :;                                           \
        fi

-sc_sun_os_names:
-       @grep -nEi \
-           'solaris[^[:alnum:]]*2\.(7|8|9|[1-9][0-9])|sunos[^[:alnum:]][6-9]' \
-           $$($(VC_LIST_EXCEPT)) &&                                    \
-         { echo '$(ME): found misuse of Sun OS version numbers' 1>&2;  \
-           exit 1; } || :
-
-sc_the_the:
-       @grep -ni '\<the ''the\>' $$($(VC_LIST_EXCEPT)) &&              \
-         { echo '$(ME): found use of "the ''the";' 1>&2;               \
-           exit 1; } || :
-
-sc_tight_scope:
-       test ! -d src || $(MAKE) -C src $@
-
 sc_trailing_blank:
-       @grep -n '[      ]$$' $$($(VC_LIST_EXCEPT)) &&                  \
-         { echo '$(ME): found trailing blank(s)'                       \
-               1>&2; exit 1; } || :
+       @prohibit='[     ]$$'                                           \
+       halt='found trailing blank(s)'                                  \
+         $(_sc_search_regexp)

 # Match lines like the following, but where there is only one space
 # between the options and the description:
 #   -D, --all-repeated[=delimit-method]  print all duplicate lines\n
 longopt_re = --[a-z][0-9A-Za-z-]*(\[?=[0-9A-Za-z-]*\]?)?
 sc_two_space_separator_in_usage:
-       @grep -nE '^   *(-[A-Za-z],)? $(longopt_re) [^ ].*\\$$'         \
-           $$($(VC_LIST_EXCEPT)) &&                                    \
-         { echo "$(ME): help2man requires at least two spaces between"; \
-           echo "$(ME): an option and its description"; \
-               1>&2; exit 1; } || :
+       @prohibit='^   *(-[A-Za-z],)? $(longopt_re) [^ ].*\\$$'         \
+       halt='help2man requires at least two spaces between an option and its 
description'\
+         $(_sc_search_regexp)
+
+# A regexp matching function names like "error" that may be used
+# to emit translatable messages.
+_gl_translatable_diag_func_re ?= error

 # 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}' $$($(VC_LIST_EXCEPT))       \
-         | grep -v '_''(' &&                                           \
+           '\<$(_gl_translatable_diag_func_re) *\([^"]*"[^"]*[a-z]{3}' \
+               $$($(VC_LIST_EXCEPT))                                   \
+         | grep -Ev '(_|ngettext ?)\(' &&                              \
          { 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 *(' $$($(VC_LIST_EXCEPT)) &&         \
-         { echo '$(ME): found useless parentheses in cpp directive'    \
-               1>&2; exit 1; } || :
+       @prohibit='^# *if .*defined *\('                                \
+       halt='found useless parentheses in cpp directive'               \
+         $(_sc_search_regexp)
+
+# List headers for which HAVE_HEADER_H is always true, assuming you are
+# using the appropriate gnulib module.  CAUTION: for each "unnecessary"
+# #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'
+
+# Convert the list of names to upper case, and replace each space with "|".
+az_ = abcdefghijklmnopqrstuvwxyz
+AZ_ = ABCDEFGHIJKLMNOPQRSTUVWXYZ
+gl_header_upper_case_or_ =                                             \
+  $$($(gl_assured_headers_)                                            \
+    | tr $(az_)/.- $(AZ_)___                                           \
+    | tr -s ' ' '|'                                                    \
+    )
+sc_prohibit_always_true_header_tests:
+       @or=$(gl_header_upper_case_or_);                                \
+       re="HAVE_($$or)_H";                                             \
+       prohibit='\<'"$$re"'\>'                                         \
+       halt=$$(printf '%s\n'                                           \
+       'do not test the above HAVE_<header>_H symbol(s);'              \
+       '  with the corresponding gnulib module, they are always true') \
+         $(_sc_search_regexp)
+
+# ==================================================================
+gl_other_headers_ ?= \
+  intprops.h   \
+  openat.h     \
+  stat-macros.h
+
+# Perl -lne code to extract "significant" cpp-defined symbols from a
+# gnulib header file, eliminating a few common false-positives.
+# The exempted names below are defined only conditionally in gnulib,
+# and hence sometimes must/may be defined in application code.
+gl_extract_significant_defines_ = \
+  /^\# *define ([^_ (][^ (]*)(\s*\(|\s+\w+)/\
+    && $$2 !~ /(?:rpl_|_used_without_)/\
+    && $$1 !~ /^(?:NSIG|ENODATA)$$/\
+    && $$1 !~ /^(?:SA_RESETHAND|SA_RESTART)$$/\
+    and print $$1
+
+# Create a list of regular expressions matching the names
+# of macros that are guaranteed to be defined by parts of gnulib.
+define def_sym_regex
+       gen_h=$(gl_generated_headers_);                                 \
+       (cd $(gnulib_dir)/lib;                                          \
+         for f in *.in.h $(gl_other_headers_); do                      \
+           test -f $$f                                                 \
+             && perl -lne '$(gl_extract_significant_defines_)' $$f;    \
+         done;                                                         \
+       ) | sort -u                                                     \
+         | sed 's/^/^ *# *(define|undef)  */;s/$$/\\>/'
+endef

-# Ensure that the c99-to-c89 patch applies cleanly.
-patch-check:
-       if test -f src/c99-to-c89.diff; then                            \
-         rm -rf src-c89 address@hidden address@hidden &&                       
                \
-         cp -a src src-c89 &&                                          \
-         (cd src-c89; patch -V never --fuzz=0) < src/c99-to-c89.diff   \
-           > address@hidden 2>&1 &&                                            
\
-         { grep -v '^patching file ' address@hidden > address@hidden || :; } 
&&                \
-         test -s address@hidden &&                                             
\
-         rm -rf src-c89 address@hidden address@hidden;                         
        \
+# Don't define macros that we already get from gnulib header files.
+sc_prohibit_always-defined_macros:
+       @if test -d $(gnulib_dir); then                                 \
+         case $$(echo all: | grep -l -f - Makefile) in Makefile);; *)  \
+           echo '$(ME): skipping $@: you lack GNU grep' 1>&2; exit 0;; \
+         esac;                                                         \
+         $(def_sym_regex) | grep -E -f - $$($(VC_LIST_EXCEPT))         \
+           && { echo '$(ME): define the above via some gnulib .h file' \
+                 1>&2;  exit 1; } || :;                                \
        fi
+# ==================================================================
+
+# Prohibit checked in backup files.
+sc_prohibit_backup_files:
+       @$(VC_LIST) | grep '~$$' &&                             \
+         { echo '$(ME): found version controlled backup file' 1>&2;    \
+           exit 1; } || :
+
+# Require the latest GPL.
+sc_GPL_version:
+       @prohibit='either ''version [^3]'                               \
+       halt='GPL vN, N!=3'                                             \
+         $(_sc_search_regexp)
+
+# Require the latest GFDL.  Two regexp, since some .texi files end up
+# line wrapping between 'Free Documentation License,' and 'Version'.
+_GFDL_regexp = (Free ''Documentation.*Version 1\.[^3]|Version 1\.[^3] or any)
+sc_GFDL_version:
+       @prohibit='$(_GFDL_regexp)'                                     \
+       halt='GFDL vN, N!=3'                                            \
+         $(_sc_search_regexp)
+
+# Don't use Texinfo's @acronym{}.
+# http://lists.gnu.org/archive/html/bug-gnulib/2010-03/msg00321.html
+texinfo_suffix_re_ ?= \.(txi|texi(nfo)?)$$
+sc_texinfo_acronym:
+       @prohibit='@acronym\{'                                          \
+       in_vc_files='$(texinfo_suffix_re_)'                             \
+       halt='found use of Texinfo @acronym{}'                          \
+         $(_sc_search_regexp)
+
+cvs_keywords = \
+  Author|Date|Header|Id|Name|Locker|Log|RCSfile|Revision|Source|State
+
+sc_prohibit_cvs_keyword:
+       @prohibit='\$$($(cvs_keywords))\$$'                             \
+       halt='do not use CVS keyword expansion'                         \
+         $(_sc_search_regexp)
+
+# This Perl code is slightly obfuscated.  Not only is each "$" doubled
+# because it's in a Makefile, but the $$c's are comments;  we cannot
+# use "#" due to the way the script ends up concatenated onto one line.
+# It would be much more concise, and would produce better output (including
+# counts) if written as:
+#   perl -ln -0777 -e '/\n(\n+)$/ and print "$ARGV: ".length $1' ...
+# but that would be far less efficient, reading the entire contents
+# of each file, rather than just the last two bytes of each.
+# In addition, while the code below detects both blank lines and a missing
+# newline at EOF, the above detects only the former.
+#
+# This is a perl script that is expected to be the single-quoted argument
+# to a command-line "-le".  The remaining arguments are file names.
+# Print the name of each file that does not end in exactly one newline byte.
+# I.e., warn if there are blank lines (2 or more newlines), or if the
+# last byte is not a newline.  However, currently we don't complain
+# about any file that contains exactly one byte.
+# Exit nonzero if at least one such file is found, otherwise, exit 0.
+# Warn about, but otherwise ignore open failure.  Ignore seek/read failure.
+#
+# Use this if you want to remove trailing empty lines from selected files:
+#   perl -pi -0777 -e 's/\n\n+$/\n/' files...
+#
+require_exactly_one_NL_at_EOF_ =                                       \
+  foreach my $$f (@ARGV)                                               \
+    {                                                                  \
+      open F, "<", $$f or (warn "failed to open $$f: $$!\n"), next;    \
+      my $$p = sysseek (F, -2, 2);                                     \
+      my $$c = "seek failure probably means file has < 2 bytes; ignore"; \
+      my $$last_two_bytes;                                             \
+      defined $$p and $$p = sysread F, $$last_two_bytes, 2;            \
+      close F;                                                         \
+      $$c = "ignore read failure";                                     \
+      $$p && ($$last_two_bytes eq "\n\n"                               \
+              || substr ($$last_two_bytes,1) ne "\n")                  \
+          and (print $$f), $$fail=1;                                   \
+    }                                                                  \
+  END { exit defined $$fail }
+sc_prohibit_empty_lines_at_EOF:
+       @perl -le '$(require_exactly_one_NL_at_EOF_)' $$($(VC_LIST_EXCEPT)) \
+         || { echo '$(ME): empty line(s) or no newline at EOF'         \
+               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) > address@hidden;                                 
\
-         { echo N;                                                     \
-           info libc date calendar format | grep '^    `%.'\'          \
-             | $(extract_char); } | sort > address@hidden;                     
\
-         diff -u address@hidden address@hidden || exit 1;                      
        \
-         rm -f address@hidden address@hidden;                                  
        \
+# Make sure we don't use st_blocks.  Use ST_NBLOCKS instead.
+# This is a bit of a kludge, since it prevents use of the string
+# even in comments, but for now it does the job with no false positives.
+sc_prohibit_stat_st_blocks:
+       @prohibit='[.>]st_blocks'                                       \
+       halt='do not use st_blocks; use ST_NBLOCKS'                     \
+         $(_sc_search_regexp)
+
+# Make sure we don't define any S_IS* macros in src/*.c files.
+# They're already defined via gnulib's sys/stat.h replacement.
+sc_prohibit_S_IS_definition:
+       @prohibit='^ *# *define  *S_IS'                                 \
+       halt='do not define S_IS* macros; include <sys/stat.h>'         \
+         $(_sc_search_regexp)
+
+# Perl block to convert a match to FILE_NAME:LINENO:TEST,
+# that is shared by two definitions below.
+perl_filename_lineno_text_ =                                           \
+    -e '  {'                                                           \
+    -e '    $$n = ($$` =~ tr/\n/\n/ + 1);'                             \
+    -e '    ($$v = $$&) =~ s/\n/\\n/g;'                                        
\
+    -e '    print "$$ARGV:$$n:$$v\n";'                                 \
+    -e '  }'
+
+prohibit_doubled_word_RE_ ?= \
+  /\b(then?|[iao]n|i[fst]|but|f?or|at|and|[dt]o)\s+\1\b/gims
+prohibit_doubled_word_ =                                               \
+    -e 'while ($(prohibit_doubled_word_RE_))'                          \
+    $(perl_filename_lineno_text_)
+
+# Define this to a regular expression that matches
+# any filename:dd:match lines you want to ignore.
+# The default is to ignore no matches.
+ignore_doubled_word_match_RE_ ?= ^$$
+
+sc_prohibit_doubled_word:
+       @perl -n -0777 $(prohibit_doubled_word_) $$($(VC_LIST_EXCEPT))  \
+         | grep -vE '$(ignore_doubled_word_match_RE_)'                 \
+         | grep . && { echo '$(ME): doubled words' 1>&2; exit 1; } || :
+
+# A regular expression matching undesirable combinations of words like
+# "can not"; this matches them even when the two words appear on different
+# lines, but not when there is an intervening delimiter like "#" or "*".
+prohibit_undesirable_word_seq_RE_ ?=                                   \
+  /\bcan\s+not\b/gims
+prohibit_undesirable_word_seq_ =                                       \
+    -e 'while ($(prohibit_undesirable_word_seq_RE_))'                  \
+    $(perl_filename_lineno_text_)
+# Define this to a regular expression that matches
+# any filename:dd:match lines you want to ignore.
+# The default is to ignore no matches.
+ignore_undesirable_word_sequence_RE_ ?= ^$$
+
+sc_prohibit_undesirable_word_seq:
+       @perl -n -0777 $(prohibit_undesirable_word_seq_)                \
+            $$($(VC_LIST_EXCEPT))                                      \
+         | grep -vE '$(ignore_undesirable_word_sequence_RE_)' | grep . \
+         && { echo '$(ME): undesirable word sequence' >&2; exit 1; } || :
+
+_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.
+# We prefer test over [, since the latter is spelled [[ in configure.ac.
+sc_prohibit_test_minus_ao:
+       @prohibit='(\<test| \[+) .+ -[ao] '                             \
+       halt='$(_ptm1); $(_ptm2)'                                       \
+         $(_sc_search_regexp)
+
+# Avoid a test bashism.
+sc_prohibit_test_double_equal:
+       @prohibit='(\<test| \[+) .+ == '                                \
+       containing='#! */bin/[a-z]*sh'                                  \
+       halt='use "test x = x", not "test x =''= x"'                    \
+         $(_sc_search_regexp)
+
+# Each program that uses proper_name_utf8 must link with one of the
+# ICONV libraries.  Otherwise, some ICONV library must appear in LDADD.
+# The perl -0777 invocation below extracts the possibly-multi-line
+# definition of LDADD from the appropriate Makefile.am and exits 0
+# when it contains "ICONV".
+sc_proper_name_utf8_requires_ICONV:
+       @progs=$$(grep -l 'proper_name_utf8 ''("' $$($(VC_LIST_EXCEPT)));\
+       if test "x$$progs" != x; then                                   \
+         fail=0;                                                       \
+         for p in $$progs; do                                          \
+           dir=$$(dirname "$$p");                                      \
+           perl -0777                                                  \
+             -ne 'exit !(/^LDADD =(.+?[^\\]\n)/ms && $$1 =~ /ICONV/)'  \
+             $$dir/Makefile.am && continue;                            \
+           base=$$(basename "$$p" .c);                                 \
+           grep "$${base}_LDADD.*ICONV)" $$dir/Makefile.am > /dev/null \
+             || { fail=1; echo 1>&2 "$(ME): $$p uses proper_name_utf8"; }; \
+         done;                                                         \
+         test $$fail = 1 &&                                            \
+           { echo 1>&2 '$(ME): the above do not link with any ICONV library'; \
+             exit 1; } || :;                                           \
        fi

-check-AUTHORS:
-       test ! -d src || $(MAKE) -C src $@
+# Warn about "c0nst struct Foo const foo[]",
+# but not about "char const *const foo" or "#define const const".
+sc_redundant_const:
+       @prohibit='\bconst\b[[:space:][:alnum:]]{2,}\bconst\b'          \
+       halt='redundant "const" in declarations'                        \
+         $(_sc_search_regexp)
+
+sc_const_long_option:
+       @grep '^ *static.*struct option ' $$($(VC_LIST_EXCEPT))         \
+         | grep -Ev 'const struct option|struct option const' && {     \
+             echo 1>&2 '$(ME): add "const" to the above declarations'; \
+             exit 1; } || :

 NEWS_hash =                                                            \
   $$(sed -n '/^\*.* $(PREV_VERSION_REGEXP) ([0-9-]*)/,$$p'             \
@@ -407,46 +1003,64 @@ update-NEWS-hash: NEWS
 # 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 $(srcdir) -name Makefile.am` \
+# However, there is still one case in which @VAR@ use is not just
+# legitimate, but actually required: when augmenting an automake-defined
+# variable with a prefix.  For example, gettext uses this:
+# MAKEINFO = env LANG= LC_MESSAGES= LC_ALL= LANGUAGE= @MAKEINFO@
+# otherwise, makeinfo would put German or French (current locale)
+# navigation hints in the otherwise-English documentation.
+#
+# Allow the package to add exceptions via a hook in cfg.mk;
+# for example, @PRAGMA_SYSTEM_HEADER@ can be permitted by
+# setting this to ' && !/PRAGMA_SYSTEM_HEADER/'.
+_makefile_at_at_check_exceptions ?=
+sc_makefile_at_at_check:
+       @perl -ne '/address@hidden@/'                                   \
+          -e ' && !/([A-Z_0-9]+)address@hidden@$$/'                    \
+          -e ''$(_makefile_at_at_check_exceptions)                     \
+         -e 'and (print "$$ARGV:$$.: $$_"), $$m=1; END {exit !$$m}'    \
+           $$($(VC_LIST_EXCEPT) | grep -E '(^|/)(Makefile\.am|[^/]+\.mk)$$') \
          && { echo '$(ME): use $$(...), not @...@' 1>&2; exit 1; } || :

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

-changelog-check:
-       if head ChangeLog | grep 'Version $(VERSION_REGEXP)\.$$'        \
-           >/dev/null; then                                            \
-         :;                                                            \
-       else                                                            \
-         echo "$(VERSION) not in ChangeLog" 1>&2;                      \
-         exit 1;                                                       \
-       fi
+sc_makefile_TAB_only_indentation:
+       @prohibit='^    [ ]{8}'                                         \
+       in_vc_files='akefile|\.mk$$'                                    \
+       halt='found TAB-8-space indentation'                            \
+         $(_sc_search_regexp)

-m4-check:
-       @shopt -s nullglob;                                             \
-       grep 'AC_DEFUN([^[]' m4/*.m4 /dev/null                          \
-         && { echo '$(ME): quote the first arg to AC_DEFUN' 1>&2; \
-              exit 1; } || :
+sc_m4_quote_check:
+       @prohibit='(AC_DEFINE(_UNQUOTED)?|AC_DEFUN)\([^[]'              \
+       in_vc_files='(^configure\.ac|\.m4)$$'                           \
+       halt='quote the first arg to AC_DEF*'                           \
+         $(_sc_search_regexp)
+
+fix_po_file_diag = \
+'you have changed the set of files with translatable diagnostics;\n\
+apply the above patch\n'

 # 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 '^(#|$$)' po/POTFILES.in                           \
+po_file ?= $(srcdir)/po/POTFILES.in
+generated_files ?= $(srcdir)/lib/*.[ch]
+sc_po_check:
+       @if test -f $(po_file); then                                    \
+         grep -E -v '^(#|$$)' $(po_file)                               \
            | grep -v '^src/false\.c$$' | sort > address@hidden;                
        \
          files=;                                                       \
-         for file in $$($(VC_LIST_EXCEPT)) lib/*.[ch]; do              \
+         for file in $$($(VC_LIST_EXCEPT)) $(generated_files); do      \
+           test -r $$file || continue;                                 \
            case $$file in                                              \
-           djgpp/* | man/*) continue;;                                 \
-           */c99-to-c89.diff) continue;;                               \
+             *.m4|*.mk) continue ;;                                    \
+             *.?|*.??) ;;                                              \
+             *) continue;;                                             \
            esac;                                                       \
            case $$file in                                              \
            *.[ch])                                                     \
@@ -456,57 +1070,123 @@ po-check:
            files="$$files $$file";                                     \
          done;                                                         \
          grep -E -l '\b(N?_|gettext *)\([^)"]*("|$$)' $$files          \
-           | sort -u > address@hidden;                                         
\
-         diff -u address@hidden address@hidden || exit 1;                      
                \
+           | sed 's|^$(_dot_escaped_srcdir)/||' | sort -u > address@hidden;    
\
+         diff -u -L $(po_file) -L $(po_file) address@hidden address@hidden     
                \
+           || { printf '$(ME): '$(fix_po_file_diag) 1>&2; exit 1; };   \
          rm -f address@hidden address@hidden;                                  
        \
        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:
-       @shopt -s nullglob;                                             \
-       grep -n '^# *define AUTHORS "[^"]* and ' src/*.c /dev/null      \
-         | grep -v ' N_ (' &&                                          \
-         { echo '$(ME): enclose the above strings in N_ (...)' 1>&2; \
-           exit 1; } || :
-
 # Sometimes it is useful to change the PATH environment variable
 # in Makefiles.  When doing so, it's better not to use the Unix-centric
-# path separator of `:', but rather the automake-provided address@hidden@'.
-# It'd be better to use `find -print0 ...|xargs -0 ...', but less portable,
-# and there probably aren't many projects with so many Makefile.am files
-# that we'd have to worry about limits on command line length.
-msg = '$(ME): Do not use `:'\'' above; use @PATH_SEPARATOR@ instead'
-makefile_path_separator_check:
-       @grep -n 'PATH=.*:' `find $(srcdir) -name Makefile.am` \
-         && { echo $(msg) 1>&2; exit 1; } || :
-
-# Check that `make alpha' will not fail at the end of the process.
+# path separator of ':', but rather the automake-provided '$(PATH_SEPARATOR)'.
+msg = '$(ME): Do not use '\'':'\'' above; use $$(PATH_SEPARATOR) instead'
+sc_makefile_path_separator_check:
+       @prohibit='PATH[=].*:'                                          \
+       in_vc_files='akefile|\.mk$$'                                    \
+       halt=$(msg)                                                     \
+         $(_sc_search_regexp)
+
+# Check that 'make alpha' will not fail at the end of the process,
+# i.e., when pkg-M.N.tar.xz already exists (either in "." or in ../release)
+# and is read-only.
 writable-files:
-       if test -d $(release_archive_dir); then :; else                 \
-         mkdir $(release_archive_dir);                                 \
+       if test -d $(release_archive_dir); then                         \
+         for file in $(DIST_ARCHIVES); do                              \
+           for p in ./ $(release_archive_dir)/; do                     \
+             test -e $$p$$file || continue;                            \
+             test -w $$p$$file                                         \
+               || { echo ERROR: $$p$$file is not writable; fail=1; };  \
+           done;                                                       \
+         done;                                                         \
+         test "$$fail" && exit 1 || : ;                                \
+       else :;                                                         \
        fi
-       for file in $(distdir).tar.gz                                   \
-                   $(release_archive_dir)/$(distdir).tar.gz; do        \
-         test -e $$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
+v_etc_file = $(gnulib_dir)/lib/version-etc.c
+sample-test = tests/sample-test
+texi = doc/$(PACKAGE).texi
 # 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 = '$$(date +%Y)' };' $(v_etc_file) \
-           >/dev/null \
-         || { echo 'out of date copyright in $(v_etc_file); update it' 1>&2; \
-              exit 1; }; \
+# Do the same for the $(sample-test) and the main doc/.texi file.
+sc_copyright_check:
+       @require='enum { COPYRIGHT_YEAR = '$$(date +%Y)' };'            \
+       in_files=$(v_etc_file)                                          \
+       halt='out of date copyright in $(v_etc_file); update it'        \
+         $(_sc_search_regexp)
+       @require='# Copyright \(C\) '$$(date +%Y)' Free'                \
+       in_vc_files=$(sample-test)                                      \
+       halt='out of date copyright in $(sample-test); update it'       \
+         $(_sc_search_regexp)
+       @require='Copyright @copyright\{\} .*'$$(date +%Y)' Free'       \
+       in_vc_files=$(texi)                                             \
+       halt='out of date copyright in $(texi); update it'              \
+         $(_sc_search_regexp)
+
+# If tests/help-version exists and seems to be new enough, assume that its
+# use of init.sh and path_prepend_ is correct, and ensure that every other
+# use of init.sh is identical.
+# This is useful because help-version cross-checks prog --version
+# with $(VERSION), which verifies that its path_prepend_ invocation
+# sets PATH correctly.  This is an inexpensive way to ensure that
+# the other init.sh-using tests also get it right.
+_hv_file ?= $(srcdir)/tests/help-version
+_hv_regex_weak ?= ^ *\. .*/init\.sh"
+# Fix syntax-highlighters "
+_hv_regex_strong ?= ^ *\. "\$${srcdir=\.}/init\.sh"
+sc_cross_check_PATH_usage_in_tests:
+       @if test -f $(_hv_file); then                                   \
+         grep -l 'VERSION mismatch' $(_hv_file) >/dev/null             \
+           || { echo "$@: skipped: no such file: $(_hv_file)" 1>&2;    \
+                exit 0; };                                             \
+         grep -lE '$(_hv_regex_strong)' $(_hv_file) >/dev/null         \
+           || { echo "$@: $(_hv_file) lacks conforming use of init.sh" 1>&2; \
+                exit 1; };                                             \
+         good=$$(grep -E '$(_hv_regex_strong)' $(_hv_file));           \
+         grep -LFx "$$good"                                            \
+               $$(grep -lE '$(_hv_regex_weak)' $$($(VC_LIST_EXCEPT)))  \
+             | grep . &&                                               \
+           { echo "$(ME): the above files use path_prepend_ inconsistently" \
+               1>&2; exit 1; } || :;                                   \
        fi

+# BRE regex of file contents to identify a test script.
+_test_script_regex ?= \<init\.sh\>
+
+# In tests, use "compare expected actual", not the reverse.
+sc_prohibit_reversed_compare_failure:
+       @prohibit='\<compare [^ ]+ ([^ ]*exp|/dev/null)'                \
+       containing='$(_test_script_regex)'                              \
+       halt='reversed compare arguments'                               \
+         $(_sc_search_regexp)
+
+# #if HAVE_... will evaluate to false for any non numeric string.
+# That would be flagged by using -Wundef, however gnulib currently
+# tests many undefined macros, and so we can't enable that option.
+# So at least preclude common boolean strings as macro values.
+sc_Wundef_boolean:
+       @prohibit='^#define.*(yes|no|true|false)$$'                     \
+       in_files='$(CONFIG_INCLUDE)'                                    \
+       halt='Use 0 or 1 for macro values'                              \
+         $(_sc_search_regexp)
+
+# Even if you use pathmax.h to guarantee that PATH_MAX is defined, it might
+# not be constant, or might overflow a stack.  In general, use PATH_MAX as
+# a limit, not an array or alloca size.
+sc_prohibit_path_max_allocation:
+       @prohibit='(\balloca *\([^)]*|\[[^]]*)PATH_MAX'                 \
+       halt='Avoid stack allocations of size PATH_MAX'                 \
+         $(_sc_search_regexp)
+
+sc_vulnerable_makefile_CVE-2009-4029:
+       @prohibit='perm -777 -exec chmod a\+rwx|chmod 777 \$$\(distdir\)' \
+       in_files=$$(find $(srcdir) -name Makefile.in)                   \
+       halt=$$(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')        \
+         $(_sc_search_regexp)
+
 vc-diff-check:
-       (CDPATH=; cd $(srcdir) && $(VC) diff) > vc-diffs || :
+       (unset CDPATH; cd $(srcdir) && $(VC) diff) > vc-diffs || :
        if test -s vc-diffs; then                               \
          cat vc-diffs;                                         \
          echo "Some files are locally modified:" 1>&2;         \
@@ -515,57 +1195,6 @@ vc-diff-check:
          rm vc-diffs;                                          \
        fi

-cvs-check: vc-diff-check
-
-maintainer-distcheck:
-       $(MAKE) distcheck
-       $(MAKE) -C tests $(AM_MAKEFLAGS) maintainer-check
-       $(MAKE) my-distcheck
-
-# Don't make a distribution if checks fail.
-# Also, make sure the NEWS file is up-to-date.
-vc-dist: $(local-check) cvs-check maintainer-distcheck
-       $(MAKE) dist
-
-# Use this to make sure we don't run these programs when building
-# from a virgin tgz file, below.
-null_AM_MAKEFLAGS = \
-  ACLOCAL=false \
-  AUTOCONF=false \
-  AUTOMAKE=false \
-  AUTOHEADER=false \
-  MAKEINFO=false
-
-# Detect format-string/arg-list mismatches that would normally be obscured
-# by the use of _().  The --disable-nls effectively defines away that macro,
-# and building with CFLAGS='-Wformat -Werror' causes any format warning to be
-# treated as a failure.  Also, check for shadowing problems with -Wshadow,
-# and for pointer arithmetic problems with -Wpointer-arith.
-# These CFLAGS are pretty strict.  If you build this target, you probably
-# have to have a recent version of gcc and glibc headers.
-TMPDIR ?= /tmp
-t=$(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                  \
-         && $(MAKE) CFLAGS='-Werror -Wall -Wformat -Wshadow -Wpointer-arith' \
-             AM_MAKEFLAGS='$(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 "========================"
-
-prev-tgz = $(PACKAGE)-$(PREV_VERSION).tar.gz
-
 rel-files = $(DIST_ARCHIVES)

 gnulib_dir ?= $(srcdir)/gnulib
@@ -575,19 +1204,28 @@ bootstrap-tools ?= autoconf,automake,gnulib
 # 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 ?= \
-  $$(git cat-file tag v$(VERSION) > .ann-sig \
-     && gpgv .ann-sig - < /dev/null 2>&1 \
-         | sed -n '/.*key ID \([0-9A-F]*\)/s//\1/p'; rm -f .ann-sig)
+  $$(git cat-file tag v$(VERSION) \
+     | gpgv --status-fd 1 --keyring /dev/null - - 2>/dev/null \
+     | sed -n '/^\[GNUPG:\] ERRSIG /{s///;s/ .*//p;q}')

 translation_project_ ?= address@hidden
-announcement_Cc_ ?= $(translation_project_), $(PACKAGE_BUGREPORT)
-announcement_mail_headers_ ?=                                          \
-To: address@hidden                                                     \
-Cc: $(announcement_Cc_)                                                        
\
-Mail-Followup-To: $(PACKAGE_BUGREPORT)
+
+# Make info-gnu the default only for a stable release.
+ifeq ($(RELEASE_TYPE),stable)
+  announcement_Cc_ ?= $(translation_project_), $(PACKAGE_BUGREPORT)
+  announcement_mail_headers_ ?=                                                
\
+    To: address@hidden                                         \
+    Cc: $(announcement_Cc_)                                            \
+    Mail-Followup-To: $(PACKAGE_BUGREPORT)
+else
+  announcement_Cc_ ?= $(translation_project_)
+  announcement_mail_headers_ ?=                                                
\
+    To: $(PACKAGE_BUGREPORT)                                           \
+    Cc: $(announcement_Cc_)
+endif

 announcement: NEWS ChangeLog $(rel-files)
-       @$(build_aux)/announce-gen                                      \
+       @$(srcdir)/$(_build-aux)/announce-gen                           \
            --mail-headers='$(announcement_mail_headers_)'              \
            --release-type=$(RELEASE_TYPE)                              \
            --package=$(PACKAGE)                                        \
@@ -596,6 +1234,7 @@ announcement: NEWS ChangeLog $(rel-files)
            --gpg-key-id=$(gpg_key_ID)                                  \
            --news=$(srcdir)/NEWS                                       \
            --bootstrap-tools=$(bootstrap-tools)                        \
+           --gnulib-version=$(gnulib-version)                          \
            --no-print-checksums                                        \
            $(addprefix --url-dir=, $(url_dir_list))

@@ -606,37 +1245,72 @@ announcement: NEWS ChangeLog $(rel-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
-
 upload_dest_dir_ ?= $(PACKAGE)
-
 emit_upload_commands:
        @echo =====================================
        @echo =====================================
-       @echo "$(build_aux)/gnupload $(GNUPLOADFLAGS) \\"
+       @echo "$(srcdir)/$(_build-aux)/gnupload $(GNUPLOADFLAGS) \\"
        @echo "    --to $(gnu_rel_host):$(upload_dest_dir_) \\"
        @echo "  $(rel-files)"
        @echo '# send the ~/announce-$(my_distdir) e-mail'
        @echo =====================================
        @echo =====================================

-noteworthy = * Noteworthy changes in release ?.? (????-??-??) [?]
 define emit-commit-log
-  printf '%s\n' 'post-release administrivia' '' \
-    '* NEWS: Add header line for next release.' \
-    '* .prev-version: Record previous version.' \
+  printf '%s\n' 'maint: post-release administrivia' ''                 \
+    '* NEWS: Add header line for next release.'                                
\
+    '* .prev-version: Record previous version.'                                
\
     '* cfg.mk (old_NEWS_hash): Auto-update.'
 endef

+.PHONY: no-submodule-changes
+no-submodule-changes:
+       if test -d $(srcdir)/.git; then                                 \
+         diff=$$(cd $(srcdir) && git submodule -q foreach              \
+                 git diff-index --name-only HEAD)                      \
+           || exit 1;                                                  \
+         case $$diff in '') ;;                                         \
+           *) echo '$(ME): submodule files are locally modified:';     \
+               echo "$$diff"; exit 1;; esac;                           \
+       else                                                            \
+         : ;                                                           \
+       fi
+
+submodule-checks ?= no-submodule-changes public-submodule-commit
+
+# Ensure that each sub-module commit we're using is public.
+# Without this, it is too easy to tag and release code that
+# cannot be built from a fresh clone.
+.PHONY: public-submodule-commit
+public-submodule-commit:
+       $(AM_V_GEN)if test -d $(srcdir)/.git; then                      \
+         cd $(srcdir) &&                                               \
+         git submodule --quiet foreach test '$$(git rev-parse $$sha1)' \
+             = '$$(git merge-base origin $$sha1)'                      \
+           || { echo '$(ME): found non-public submodule commit' >&2;   \
+                exit 1; };                                             \
+       else                                                            \
+         : ;                                                           \
+       fi
+# This rule has a high enough utility/cost ratio that it should be a
+# dependent of "check" by default.  However, some of us do occasionally
+# commit a temporary change that deliberately points to a non-public
+# submodule commit, and want to be able to use rules like "make check".
+# In that case, run e.g., "make check gl_public_submodule_commit="
+# to disable this test.
+gl_public_submodule_commit ?= public-submodule-commit
+check: $(gl_public_submodule_commit)
+
 .PHONY: alpha beta stable
 ALL_RECURSIVE_TARGETS += alpha beta stable
-alpha beta stable: news-date-check changelog-check $(local-check)
+alpha beta stable: $(local-check) writable-files $(submodule-checks)
        test $@ = stable                                                \
          && { echo $(VERSION) | grep -E '^[0-9]+(\.[0-9]+)+$$'         \
               || { echo "invalid version string: $(VERSION)" 1>&2; exit 1;};}\
          || :
-       $(MAKE) vc-dist
+       $(MAKE) vc-diff-check
+       $(MAKE) news-check
+       $(MAKE) distcheck
        $(MAKE) dist XZ_OPT=-9ev
        $(MAKE) $(release-prep-hook) RELEASE_TYPE=$@
        $(MAKE) -s emit_upload_commands RELEASE_TYPE=$@
@@ -644,23 +1318,23 @@ alpha beta stable: news-date-check changelog-check 
$(local-check)
 # Override this in cfg.mk if you follow different procedures.
 release-prep-hook ?= release-prep

+gl_noteworthy_news_ = * Noteworthy changes in release ?.? (????-??-??) [?]
 .PHONY: release-prep
 release-prep:
        case $$RELEASE_TYPE in alpha|beta|stable) ;; \
          *) echo "invalid RELEASE_TYPE: $$RELEASE_TYPE" 1>&2; exit 1;; esac
-       $(MAKE) -s announcement > ~/announce-$(my_distdir)
+       $(MAKE) --no-print-directory -s announcement > ~/announce-$(my_distdir)
        if test -d $(release_archive_dir); then                 \
          ln $(rel-files) $(release_archive_dir);               \
          chmod a-w $(rel-files);                               \
        fi
        echo $(VERSION) > $(prev_version_file)
        $(MAKE) update-NEWS-hash
-       perl -pi -e '$$. == 3 and print "$(noteworthy)\n\n\n"' NEWS
+       perl -pi -e '$$. == 3 and print "$(gl_noteworthy_news_)\n\n\n"' NEWS
        $(emit-commit-log) > .ci-msg
        $(VC) commit -F .ci-msg -a
        rm .ci-msg

-
 # Override this with e.g., -s $(srcdir)/some_other_name.texi
 # if the default $(PACKAGE)-derived name doesn't apply.
 gendocs_options_ ?=
@@ -670,12 +1344,56 @@ web-manual:
        @test -z "$(manual_title)" \
          && { echo define manual_title in cfg.mk 1>&2; exit 1; } || :
        @cd '$(srcdir)/doc'; \
-         $(SHELL) ../build-aux/gendocs.sh $(gendocs_options_) \
+         $(SHELL) ../$(_build-aux)/gendocs.sh $(gendocs_options_) \
             -o '$(abs_builddir)/doc/manual' \
             --email $(PACKAGE_BUGREPORT) $(PACKAGE) \
            "$(PACKAGE_NAME) - $(manual_title)"
        @echo " *** Upload the doc/manual directory to web-cvs."

+# Code Coverage
+
+init-coverage:
+       $(MAKE) $(AM_MAKEFLAGS) clean
+       lcov --directory . --zerocounters
+
+COVERAGE_CCOPTS ?= "-g --coverage"
+COVERAGE_OUT ?= doc/coverage
+
+build-coverage:
+       $(MAKE) $(AM_MAKEFLAGS) CFLAGS=$(COVERAGE_CCOPTS) 
CXXFLAGS=$(COVERAGE_CCOPTS)
+       $(MAKE) $(AM_MAKEFLAGS) CFLAGS=$(COVERAGE_CCOPTS) 
CXXFLAGS=$(COVERAGE_CCOPTS) check
+       mkdir -p $(COVERAGE_OUT)
+       lcov --directory . --output-file $(COVERAGE_OUT)/$(PACKAGE).info \
+               --capture
+
+gen-coverage:
+       genhtml --output-directory $(COVERAGE_OUT) \
+               $(COVERAGE_OUT)/$(PACKAGE).info \
+               --highlight --frames --legend \
+               --title "$(PACKAGE_NAME)"
+
+coverage: init-coverage build-coverage gen-coverage
+
+# Update gettext files.
+PACKAGE ?= $(shell basename $(PWD))
+PO_DOMAIN ?= $(PACKAGE)
+POURL = http://translationproject.org/latest/$(PO_DOMAIN)/
+PODIR ?= po
+refresh-po:
+       rm -f $(PODIR)/*.po && \
+       echo "$(ME): getting translations into po (please ignore the robots.txt 
ERROR 404)..." && \
+       wget --no-verbose --directory-prefix $(PODIR) --no-directories 
--recursive --level 1 --accept .po --accept .po.1 $(POURL) && \
+       echo 'address@hidden' > $(PODIR)/LINGUAS && \
+       echo 'address@hidden' >> $(PODIR)/LINGUAS && \
+       ls $(PODIR)/*.po | sed 's/\.po//' | sed 's,$(PODIR)/,,' | sort >> 
$(PODIR)/LINGUAS
+
+ # Running indent once is not idempotent, but running it twice is.
+INDENT_SOURCES ?= $(C_SOURCES)
+.PHONY: indent
+indent:
+       indent $(INDENT_SOURCES)
+       indent $(INDENT_SOURCES)
+
 # If you want to set UPDATE_COPYRIGHT_* environment variables,
 # put the assignments in this variable.
 update-copyright-env ?=
@@ -689,6 +1407,106 @@ update-copyright-env ?=
 # in the file .x-update-copyright.
 .PHONY: update-copyright
 update-copyright:
-       grep -l -w Copyright $$($(VC_LIST_EXCEPT))              \
-               $(srcdir)/ChangeLog | grep -v COPYING           \
-         | $(update-copyright-env) xargs $(build_aux)/$@
+       grep -l -w Copyright                                             \
+         $$(export VC_LIST_EXCEPT_DEFAULT=COPYING && $(VC_LIST_EXCEPT)) \
+         | $(update-copyright-env) xargs $(srcdir)/$(_build-aux)/$@
+
+# This tight_scope test is skipped with a warning if $(_gl_TS_headers) is not
+# overridden and $(_gl_TS_dir)/Makefile.am does not mention noinst_HEADERS.
+
+# NOTE: to override any _gl_TS_* default value, you must
+# define the variable(s) using "export" in cfg.mk.
+_gl_TS_dir ?= src
+
+ALL_RECURSIVE_TARGETS += sc_tight_scope
+sc_tight_scope: tight-scope.mk
+       @fail=0;                                                        \
+       if ! grep '^ *export _gl_TS_headers *=' $(srcdir)/cfg.mk        \
+               > /dev/null                                             \
+          && ! grep -w noinst_HEADERS $(srcdir)/$(_gl_TS_dir)/Makefile.am \
+               > /dev/null 2>&1; then                                  \
+           echo '$(ME): skipping $@';                                  \
+       else                                                            \
+           $(MAKE) -s -C $(_gl_TS_dir)                                 \
+               -f Makefile                                             \
+               -f $(abs_top_srcdir)/cfg.mk                             \
+               -f $(abs_top_builddir)/$<                               \
+             _gl_tight_scope                                           \
+               || fail=1;                                              \
+       fi;                                                             \
+       rm -f $<;                                                       \
+       exit $$fail
+
+tight-scope.mk: $(ME)
+       @rm -f $@ address@hidden
+       @perl -ne '/^# TS-start/.../^# TS-end/ and print' $(srcdir)/$(ME) > 
address@hidden
+       @chmod a=r address@hidden && mv address@hidden $@
+
+ifeq (a,b)
+# TS-start
+
+# Most functions should have static scope.
+# Any that don't must be marked with 'extern', but 'main'
+# and 'usage' are exceptions: they're always extern, but
+# do not need to be marked.  Symbols matching '__.*' are
+# reserved by the compiler, so are automatically excluded below.
+_gl_TS_unmarked_extern_functions ?= main usage
+_gl_TS_function_match ?= /^(?:$(_gl_TS_extern)) +.*?(\S+) *\(/
+
+# If your project uses a macro like "XTERN", then put
+# the following in cfg.mk to override this default:
+# export _gl_TS_extern = extern|XTERN
+_gl_TS_extern ?= extern
+
+# The second nm|grep checks for file-scope variables with 'extern' scope.
+# Without gnulib's progname module, you might put program_name here.
+# Symbols matching '__.*' are reserved by the compiler,
+# so are automatically excluded below.
+_gl_TS_unmarked_extern_vars ?=
+
+# NOTE: the _match variables are perl expressions -- not mere regular
+# expressions -- so that you can extend them to match other patterns
+# and easily extract matched variable names.
+# For example, if your project declares some global variables via
+# a macro like this: GLOBAL(type, var_name, initializer), then you
+# can override this definition to automatically extract those names:
+# export _gl_TS_var_match = \
+#   /^(?:$(_gl_TS_extern)) .*?\**(\w+)(\[.*?\])?;/ || /\bGLOBAL\(.*?,\s*(.*?),/
+_gl_TS_var_match ?= /^(?:$(_gl_TS_extern)) .*?(\w+)(\[.*?\])?;/
+
+# The names of object files in (or relative to) $(_gl_TS_dir).
+_gl_TS_obj_files ?= *.$(OBJEXT)
+
+# Files in which to search for the one-line style extern declarations.
+# $(_gl_TS_dir)-relative.
+_gl_TS_headers ?= $(noinst_HEADERS)
+
+.PHONY: _gl_tight_scope
+_gl_tight_scope: $(bin_PROGRAMS)
+       t=exceptions-$$$$;                                              \
+       trap 's=$$?; rm -f $$t; exit $$s' 0;                            \
+       for sig in 1 2 3 13 15; do                                      \
+         eval "trap 'v=`expr $$sig + 128`; (exit $$v); exit $$v' $$sig"; \
+       done;                                                           \
+       src=`for f in $(SOURCES); 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$$\n' '__.*' $(_gl_TS_unmarked_extern_functions);  \
+         grep -h -A1 '^extern .*[^;]$$' $$src                          \
+           | grep -vE '^(extern |--)' | sed 's/ .*//';                 \
+         perl -lne                                                     \
+            '$(_gl_TS_function_match) and print "^$$1\$$"' $$hdr;      \
+       ) | sort -u > $$t;                                              \
+       nm -e $(_gl_TS_obj_files) | sed -n 's/.* T //p'|grep -Ev -f $$t \
+         && { echo the above functions should have static scope >&2;   \
+              exit 1; } || : ;                                         \
+       ( printf '^%s$$\n' '__.*' $(_gl_TS_unmarked_extern_vars);       \
+         perl -lne '$(_gl_TS_var_match) and print "^$$1\$$"' $$hdr *.h \
+       ) | sort -u > $$t;                                              \
+       nm -e $(_gl_TS_obj_files) | sed -n 's/.* [BCDGRS] //p'          \
+            | sort -u | grep -Ev -f $$t                                        
\
+         && { echo the above variables should have static scope >&2;   \
+              exit 1; } || :
+# TS-end
+endif
-- 
1.7.9.rc2.2.g183d6




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