maint.mk

   1 # -*-Makefile-*-
   2 # This Makefile fragment tries to be general-purpose enough to be
   3 # used by many projects via the gnulib maintainer-makefile module.
   4
   5 ## Copyright (C) 2001-2012 Free Software Foundation, Inc.
   6 ##
   7 ## This program is free software: you can redistribute it and/or modify
   8 ## it under the terms of the GNU General Public License as published by
   9 ## the Free Software Foundation, either version 3 of the License, or
  10 ## (at your option) any later version.
  11 ##
  12 ## This program is distributed in the hope that it will be useful,
  13 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ## GNU General Public License for more details.
  16 ##
  17 ## You should have received a copy of the GNU General Public License
  18 ## along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 # This is reported not to work with make-3.79.1
  21 # ME := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
  22 ME := maint.mk
  23
  24 # Diagnostic for continued use of deprecated variable.
  25 # Remove in 2013
  26 ifneq ($(build_aux),)
  27  $(error "$(ME): \
  28 set $$(_build-aux) relative to $$(srcdir) instead of $$(build_aux)")
  29 endif
  30
  31 # Do not save the original name or timestamp in the .tar.gz file.
  32 # Use --rsyncable if available.
  33 gzip_rsyncable := \
  34   $(shell gzip --help 2>/dev/null|grep rsyncable >/dev/null \
  35     && printf %s --rsyncable)
  36 GZIP_ENV = '--no-name --best $(gzip_rsyncable)'
  37
  38 GIT = git
  39 VC = $(GIT)
  40
  41 VC_LIST = $(srcdir)/$(_build-aux)/vc-list-files -C $(srcdir)
  42
  43 # You can override this variable in cfg.mk to set your own regexp
  44 # matching files to ignore.
  45 VC_LIST_ALWAYS_EXCLUDE_REGEX ?= ^$$
  46
  47 # This is to preprocess robustly the output of $(VC_LIST), so that even
  48 # when $(srcdir) is a pathological name like "....", the leading sed command
  49 # removes only the intended prefix.
  50 _dot_escaped_srcdir = $(subst .,\.,$(srcdir))
  51
  52 # Post-process $(VC_LIST) output, prepending $(srcdir)/, but only
  53 # when $(srcdir) is not ".".
  54 ifeq ($(srcdir),.)
  55 _prepend_srcdir_prefix =
  56 else
  57 _prepend_srcdir_prefix = | sed 's|^|$(srcdir)/|'
  58 endif
  59
  60 # In order to be able to consistently filter "."-relative names,
  61 # (i.e., with no $(srcdir) prefix), this definition is careful to
  62 # remove any $(srcdir) prefix, and to restore what it removes.
  63 _sc_excl = \
  64   $(if $(exclude_file_name_regexp--$@),$(exclude_file_name_regexp--$@),^$$)
  65 VC_LIST_EXCEPT = \
  66   $(VC_LIST) | sed 's|^$(_dot_escaped_srcdir)/||' \
  67         | if test -f $(srcdir)/.x-$@; then grep -vEf $(srcdir)/.x-$@; \
  68           else grep -Ev -e "$${VC_LIST_EXCEPT_DEFAULT-ChangeLog}"; fi \
  69         | grep -Ev -e '($(VC_LIST_ALWAYS_EXCLUDE_REGEX)|$(_sc_excl))' \
  70         $(_prepend_srcdir_prefix)
  71
  72 ifeq ($(origin prev_version_file), undefined)
  73   prev_version_file = $(srcdir)/.prev-version
  74 endif
  75
  76 PREV_VERSION := $(shell cat $(prev_version_file) 2>/dev/null)
  77 VERSION_REGEXP = $(subst .,\.,$(VERSION))
  78 PREV_VERSION_REGEXP = $(subst .,\.,$(PREV_VERSION))
  79
  80 ifeq ($(VC),$(GIT))
  81 this-vc-tag = v$(VERSION)
  82 this-vc-tag-regexp = v$(VERSION_REGEXP)
  83 else
  84 tag-package = $(shell echo "$(PACKAGE)" | tr '[:lower:]' '[:upper:]')
  85 tag-this-version = $(subst .,_,$(VERSION))
  86 this-vc-tag = $(tag-package)-$(tag-this-version)
  87 this-vc-tag-regexp = $(this-vc-tag)
  88 endif
  89 my_distdir = $(PACKAGE)-$(VERSION)
  90
  91 # Old releases are stored here.
  92 release_archive_dir ?= ../release
  93
  94 # Override gnu_rel_host and url_dir_list in cfg.mk if these are not right.
  95 # Use alpha.gnu.org for alpha and beta releases.
  96 # Use ftp.gnu.org for stable releases.
  97 gnu_ftp_host-alpha = alpha.gnu.org
  98 gnu_ftp_host-beta = alpha.gnu.org
  99 gnu_ftp_host-stable = ftp.gnu.org
 100 gnu_rel_host ?= $(gnu_ftp_host-$(RELEASE_TYPE))
 101
 102 ifeq ($(gnu_rel_host),ftp.gnu.org)
 103 url_dir_list ?= http://ftpmirror.gnu.org/$(PACKAGE)
 104 else
 105 url_dir_list ?= ftp://$(gnu_rel_host)/gnu/$(PACKAGE)
 106 endif
 107
 108 # Override this in cfg.mk if you are using a different format in your
 109 # NEWS file.
 110 today = $(shell date +%Y-%m-%d)
 111
 112 # Select which lines of NEWS are searched for $(news-check-regexp).
 113 # This is a sed line number spec.  The default says that we search
 114 # lines 1..10 of NEWS for $(news-check-regexp).
 115 # If you want to search only line 3 or only lines 20-22, use "3" or "20,22".
 116 news-check-lines-spec ?= 1,10
 117 news-check-regexp ?= '^\*.* $(VERSION_REGEXP) \($(today)\)'
 118
 119 # Prevent programs like 'sort' from considering distinct strings to be equal.
 120 # Doing it here saves us from having to set LC_ALL elsewhere in this file.
 121 export LC_ALL = C
 122
 123 ## --------------- ##
 124 ## Sanity checks.  ##
 125 ## --------------- ##
 126
 127 _cfg_mk := $(shell test -f $(srcdir)/cfg.mk && echo '$(srcdir)/cfg.mk')
 128
 129 # Collect the names of rules starting with 'sc_'.
 130 syntax-check-rules := $(sort $(shell sed -n 's/^\(sc_[a-zA-Z0-9_-]*\):.*/\1/p' \
 131                         $(srcdir)/$(ME) $(_cfg_mk)))
 132 .PHONY: $(syntax-check-rules)
 133
 134 ifeq ($(shell $(VC_LIST) >/dev/null 2>&1; echo $$?),0)
 135 local-checks-available += $(syntax-check-rules)
 136 else
 137 local-checks-available += no-vc-detected
 138 no-vc-detected:
 139         @echo "No version control files detected; skipping syntax check"
 140 endif
 141 .PHONY: $(local-checks-available)
 142
 143 # Arrange to print the name of each syntax-checking rule just before running it.
 144 $(syntax-check-rules): %: %.m
 145 sc_m_rules_ = $(patsubst %, %.m, $(syntax-check-rules))
 146 .PHONY: $(sc_m_rules_)
 147 $(sc_m_rules_):
 148         @echo $(patsubst sc_%.m, %, $@)
 149         @date +%s.%N > .sc-start-$(basename $@)
 150
 151 # Compute and print the elapsed time for each syntax-check rule.
 152 sc_z_rules_ = $(patsubst %, %.z, $(syntax-check-rules))
 153 .PHONY: $(sc_z_rules_)
 154 $(sc_z_rules_): %.z: %
 155         @end=$$(date +%s.%N);                                           \
 156         start=$$(cat .sc-start-$*);                                     \
 157         rm -f .sc-start-$*;                                             \
 158         awk -v s=$$start -v e=$$end                                     \
 159           'END {printf "%.2f $(patsubst sc_%,%,$*)\n", e - s}' < /dev/null
 160
 161 # The patsubst here is to replace each sc_% rule with its sc_%.z wrapper
 162 # that computes and prints elapsed time.
 163 local-check :=                                                          \
 164   $(patsubst sc_%, sc_%.z,                                              \
 165     $(filter-out $(local-checks-to-skip), $(local-checks-available)))
 166
 167 syntax-check: $(local-check)
 168
 169 # _sc_search_regexp
 170 #
 171 # This macro searches for a given construct in the selected files and
 172 # then takes some action.
 173 #
 174 # Parameters (shell variables):
 175 #
 176 #  prohibit | require
 177 #
 178 #     Regular expression (ERE) denoting either a forbidden construct
 179 #     or a required construct.  Those arguments are exclusive.
 180 #
 181 #  exclude
 182 #
 183 #     Regular expression (ERE) denoting lines to ignore that matched
 184 #     a prohibit construct.  For example, this can be used to exclude
 185 #     comments that mention why the nearby code uses an alternative
 186 #     construct instead of the simpler prohibited construct.
 187 #
 188 #  in_vc_files | in_files
 189 #
 190 #     grep-E-style regexp denoting the files to check.  If no files
 191 #     are specified the default are all the files that are under
 192 #     version control.
 193 #
 194 #  containing | non_containing
 195 #
 196 #     Select the files (non) containing strings matching this regexp.
 197 #     If both arguments are specified then CONTAINING takes
 198 #     precedence.
 199 #
 200 #  with_grep_options
 201 #
 202 #     Extra options for grep.
 203 #
 204 #  ignore_case
 205 #
 206 #     Ignore case.
 207 #
 208 #  halt
 209 #
 210 #     Message to display before to halting execution.
 211 #
 212 # Finally, you may exempt files based on an ERE matching file names.
 213 # For example, to exempt from the sc_space_tab check all files with the
 214 # .diff suffix, set this Make variable:
 215 #
 216 # exclude_file_name_regexp--sc_space_tab = \.diff$
 217 #
 218 # Note that while this functionality is mostly inherited via VC_LIST_EXCEPT,
 219 # when filtering by name via in_files, we explicitly filter out matching
 220 # names here as well.
 221
 222 # Initialize each, so that envvar settings cannot interfere.
 223 export require =
 224 export prohibit =
 225 export exclude =
 226 export in_vc_files =
 227 export in_files =
 228 export containing =
 229 export non_containing =
 230 export halt =
 231 export with_grep_options =
 232
 233 # By default, _sc_search_regexp does not ignore case.
 234 export ignore_case =
 235 _ignore_case = $$(test -n "$$ignore_case" && printf %s -i || :)
 236
 237 define _sc_say_and_exit
 238    dummy=; : so we do not need a semicolon before each use;             \
 239    { printf '%s\n' "$(ME): $$msg" 1>&2; exit 1; };
 240 endef
 241
 242 define _sc_search_regexp
 243    dummy=; : so we do not need a semicolon before each use;             \
 244                                                                         \
 245    : Check arguments;                                                   \
 246    test -n "$$prohibit" && test -n "$$require"                          \
 247      && { msg='Cannot specify both prohibit and require'                \
 248           $(_sc_say_and_exit) } || :;                                   \
 249    test -z "$$prohibit" && test -z "$$require"                          \
 250      && { msg='Should specify either prohibit or require'               \
 251           $(_sc_say_and_exit) } || :;                                   \
 252    test -z "$$prohibit" && test -n "$$exclude"                          \
 253      && { msg='Use of exclude requires a prohibit pattern'              \
 254           $(_sc_say_and_exit) } || :;                                   \
 255    test -n "$$in_vc_files" && test -n "$$in_files"                      \
 256      && { msg='Cannot specify both in_vc_files and in_files'            \
 257           $(_sc_say_and_exit) } || :;                                   \
 258    test "x$$halt" != x                                                  \
 259      || { msg='halt not defined' $(_sc_say_and_exit) };                 \
 260                                                                         \
 261    : Filter by file name;                                               \
 262    if test -n "$$in_files"; then                                        \
 263      files=$$(find $(srcdir) | grep -E "$$in_files"                     \
 264               | grep -Ev '$(exclude_file_name_regexp--$@)');            \
 265    else                                                                 \
 266      files=$$($(VC_LIST_EXCEPT));                                       \
 267      if test -n "$$in_vc_files"; then                                   \
 268        files=$$(echo "$$files" | grep -E "$$in_vc_files");              \
 269      fi;                                                                \
 270    fi;                                                                  \
 271                                                                         \
 272    : Filter by content;                                                 \
 273    test -n "$$files" && test -n "$$containing"                          \
 274      && { files=$$(grep -l "$$containing" $$files); } || :;             \
 275    test -n "$$files" && test -n "$$non_containing"                      \
 276      && { files=$$(grep -vl "$$non_containing" $$files); } || :;        \
 277                                                                         \
 278    : Check for the construct;                                           \
 279    if test -n "$$files"; then                                           \
 280      if test -n "$$prohibit"; then                                      \
 281        grep $$with_grep_options $(_ignore_case) -nE "$$prohibit" $$files \
 282          | grep -vE "$${exclude:-^$$}"                                  \
 283          && { msg="$$halt" $(_sc_say_and_exit) } || :;                  \
 284      else                                                               \
 285        grep $$with_grep_options $(_ignore_case) -LE "$$require" $$files \
 286            | grep .                                                     \
 287          && { msg="$$halt" $(_sc_say_and_exit) } || :;                  \
 288      fi                                                                 \
 289    else :;                                                              \
 290    fi || :;
 291 endef
 292
 293 sc_avoid_if_before_free:
 294         @$(srcdir)/$(_build-aux)/useless-if-before-free                 \
 295                 $(useless_free_options)                                 \
 296             $$($(VC_LIST_EXCEPT) | grep -v useless-if-before-free) &&   \
 297           { echo '$(ME): found useless "if" before "free" above' 1>&2;  \
 298             exit 1; } || :
 299
 300 sc_cast_of_argument_to_free:
 301         @prohibit='\<free *\( *\(' halt="don't cast free argument"      \
 302           $(_sc_search_regexp)
 303
 304 sc_cast_of_x_alloc_return_value:
 305         @prohibit='\*\) *x(m|c|re)alloc\>'                              \
 306         halt="don't cast x*alloc return value"                          \
 307           $(_sc_search_regexp)
 308
 309 sc_cast_of_alloca_return_value:
 310         @prohibit='\*\) *alloca\>'                                      \
 311         halt="don't cast alloca return value"                           \
 312           $(_sc_search_regexp)
 313
 314 sc_space_tab:
 315         @prohibit='[ ]  '                                               \
 316         halt='found SPACE-TAB sequence; remove the SPACE'               \
 317           $(_sc_search_regexp)
 318
 319 # Don't use *scanf or the old ato* functions in "real" code.
 320 # They provide no error checking mechanism.
 321 # Instead, use strto* functions.
 322 sc_prohibit_atoi_atof:
 323         @prohibit='\<([fs]?scanf|ato([filq]|ll)) *\('                           \
 324         halt='do not use *scan''f, ato''f, ato''i, ato''l, ato''ll or ato''q'   \
 325           $(_sc_search_regexp)
 326
 327 # Use STREQ rather than comparing strcmp == 0, or != 0.
 328 sp_ = strcmp *\(.+\)
 329 sc_prohibit_strcmp:
 330         @prohibit='! *strcmp *\(|\<$(sp_) *[!=]=|[!=]= *$(sp_)'         \
 331         exclude=':# *define STRN?EQ\('                                  \
 332         halt='$(ME): replace strcmp calls above with STREQ/STRNEQ'      \
 333           $(_sc_search_regexp)
 334
 335 # Pass EXIT_*, not number, to usage, exit, and error (when exiting)
 336 # Convert all uses automatically, via these two commands:
 337 # git grep -l '\<exit *(1)' \
 338 #  | grep -vEf .x-sc_prohibit_magic_number_exit \
 339 #  | xargs --no-run-if-empty \
 340 #      perl -pi -e 's/(^|[^.])\b(exit ?)\(1\)/$1$2(EXIT_FAILURE)/'
 341 # git grep -l '\<exit *(0)' \
 342 #  | grep -vEf .x-sc_prohibit_magic_number_exit \
 343 #  | xargs --no-run-if-empty \
 344 #      perl -pi -e 's/(^|[^.])\b(exit ?)\(0\)/$1$2(EXIT_SUCCESS)/'
 345 sc_prohibit_magic_number_exit:
 346         @prohibit='(^|[^.])\<(usage|exit) ?\([0-9]|\<error ?\([1-9][0-9]*,'     \
 347         halt='use EXIT_* values rather than magic number'                       \
 348           $(_sc_search_regexp)
 349
 350 # Using EXIT_SUCCESS as the first argument to error is misleading,
 351 # since when that parameter is 0, error does not exit.  Use '0' instead.
 352 sc_error_exit_success:
 353         @prohibit='error *\(EXIT_SUCCESS,'                              \
 354         in_vc_files='\.[chly]$$'                                        \
 355         halt='found error (EXIT_SUCCESS'                                \
 356          $(_sc_search_regexp)
 357
 358 # "FATAL:" should be fully upper-cased in error messages
 359 # "WARNING:" should be fully upper-cased, or fully lower-cased
 360 sc_error_message_warn_fatal:
 361         @grep -nEA2 '[^rp]error *\(' $$($(VC_LIST_EXCEPT))              \
 362             | grep -E '"Warning|"Fatal|"fatal' &&                       \
 363           { echo '$(ME): use FATAL, WARNING or warning' 1>&2;           \
 364             exit 1; } || :
 365
 366 # Error messages should not start with a capital letter
 367 sc_error_message_uppercase:
 368         @grep -nEA2 '[^rp]error *\(' $$($(VC_LIST_EXCEPT))              \
 369             | grep -E '"[A-Z]'                                          \
 370             | grep -vE '"FATAL|"WARNING|"Java|"C#|PRIuMAX' &&           \
 371           { echo '$(ME): found capitalized error message' 1>&2;         \
 372             exit 1; } || :
 373
 374 # Error messages should not end with a period
 375 sc_error_message_period:
 376         @grep -nEA2 '[^rp]error *\(' $$($(VC_LIST_EXCEPT))              \
 377             | grep -E '[^."]\."' &&                                     \
 378           { echo '$(ME): found error message ending in period' 1>&2;    \
 379             exit 1; } || :
 380
 381 sc_file_system:
 382         @prohibit=file''system                                          \
 383         ignore_case=1                                                   \
 384         halt='found use of "file''system"; spell it "file system"'      \
 385           $(_sc_search_regexp)
 386
 387 # Don't use cpp tests of this symbol.  All code assumes config.h is included.
 388 sc_prohibit_have_config_h:
 389         @prohibit='^# *if.*HAVE''_CONFIG_H'                             \
 390         halt='found use of HAVE''_CONFIG_H; remove'                     \
 391           $(_sc_search_regexp)
 392
 393 # Nearly all .c files must include <config.h>.  However, we also permit this
 394 # via inclusion of a package-specific header, if cfg.mk specified one.
 395 # config_h_header must be suitable for grep -E.
 396 config_h_header ?= <config\.h>
 397 sc_require_config_h:
 398         @require='^# *include $(config_h_header)'                       \
 399         in_vc_files='\.c$$'                                             \
 400         halt='the above files do not include <config.h>'                \
 401           $(_sc_search_regexp)
 402
 403 # You must include <config.h> before including any other header file.
 404 # This can possibly be via a package-specific header, if given by cfg.mk.
 405 sc_require_config_h_first:
 406         @if $(VC_LIST_EXCEPT) | grep -l '\.c$$' > /dev/null; then       \
 407           fail=0;                                                       \
 408           for i in $$($(VC_LIST_EXCEPT) | grep '\.c$$'); do             \
 409             grep '^# *include\>' $$i | sed 1q                           \
 410                 | grep -E '^# *include $(config_h_header)' > /dev/null  \
 411               || { echo $$i; fail=1; };                                 \
 412           done;                                                         \
 413           test $$fail = 1 &&                                            \
 414             { echo '$(ME): the above files include some other header'   \
 415                 'before <config.h>' 1>&2; exit 1; } || :;               \
 416         else :;                                                         \
 417         fi
 418
 419 sc_prohibit_HAVE_MBRTOWC:
 420         @prohibit='\bHAVE_MBRTOWC\b'                                    \
 421         halt="do not use $$prohibit; it is always defined"              \
 422           $(_sc_search_regexp)
 423
 424 # To use this "command" macro, you must first define two shell variables:
 425 # h: the header name, with no enclosing <> or ""
 426 # re: a regular expression that matches IFF something provided by $h is used.
 427 define _sc_header_without_use
 428   dummy=; : so we do not need a semicolon before each use;              \
 429   h_esc=`echo '[<"]'"$$h"'[">]'|sed 's/\./\\\\./g'`;                    \
 430   if $(VC_LIST_EXCEPT) | grep -l '\.c$$' > /dev/null; then              \
 431     files=$$(grep -l '^# *include '"$$h_esc"                            \
 432              $$($(VC_LIST_EXCEPT) | grep '\.c$$')) &&                   \
 433     grep -LE "$$re" $$files | grep . &&                                 \
 434       { echo "$(ME): the above files include $$h but don't use it"      \
 435         1>&2; exit 1; } || :;                                           \
 436   else :;                                                               \
 437   fi
 438 endef
 439
 440 # Prohibit the inclusion of assert.h without an actual use of assert.
 441 sc_prohibit_assert_without_use:
 442         @h='assert.h' re='\<assert *\(' $(_sc_header_without_use)
 443
 444 # Prohibit the inclusion of close-stream.h without an actual use.
 445 sc_prohibit_close_stream_without_use:
 446         @h='close-stream.h' re='\<close_stream *\(' $(_sc_header_without_use)
 447
 448 # Prohibit the inclusion of getopt.h without an actual use.
 449 sc_prohibit_getopt_without_use:
 450         @h='getopt.h' re='\<getopt(_long)? *\(' $(_sc_header_without_use)
 451
 452 # Don't include quotearg.h unless you use one of its functions.
 453 sc_prohibit_quotearg_without_use:
 454         @h='quotearg.h' re='\<quotearg(_[^ ]+)? *\(' $(_sc_header_without_use)
 455
 456 # Don't include quote.h unless you use one of its functions.
 457 sc_prohibit_quote_without_use:
 458         @h='quote.h' re='\<quote((_n)? *\(|_quoting_options\>)' \
 459           $(_sc_header_without_use)
 460
 461 # Don't include this header unless you use one of its functions.
 462 sc_prohibit_long_options_without_use:
 463         @h='long-options.h' re='\<parse_long_options *\(' \
 464           $(_sc_header_without_use)
 465
 466 # Don't include this header unless you use one of its functions.
 467 sc_prohibit_inttostr_without_use:
 468         @h='inttostr.h' re='\<(off|[iu]max|uint)tostr *\(' \
 469           $(_sc_header_without_use)
 470
 471 # Don't include this header unless you use one of its functions.
 472 sc_prohibit_ignore_value_without_use:
 473         @h='ignore-value.h' re='\<ignore_(value|ptr) *\(' \
 474           $(_sc_header_without_use)
 475
 476 # Don't include this header unless you use one of its functions.
 477 sc_prohibit_error_without_use:
 478         @h='error.h' \
 479         re='\<error(_at_line|_print_progname|_one_per_line|_message_count)? *\('\
 480           $(_sc_header_without_use)
 481
 482 # Don't include xalloc.h unless you use one of its functions.
 483 # Consider these symbols:
 484 # perl -lne '/^# *define (\w+)\(/ and print $1' lib/xalloc.h|grep -v '^__';
 485 # perl -lne '/^(?:extern )?(?:void|char) \*?(\w+) *\(/ and print $1' lib/xalloc.h
 486 # Divide into two sets on case, and filter each through this:
 487 # | sort | perl -MRegexp::Assemble -le \
 488 #  'print Regexp::Assemble->new(file => "/dev/stdin")->as_string'|sed 's/\?://g'
 489 # Note this was produced by the above:
 490 # _xa1 = \
 491 #x(((2n?)?re|c(har)?|n(re|m)|z)alloc|alloc_(oversized|die)|m(alloc|emdup)|strdup)
 492 # But we can do better, in at least two ways:
 493 # 1) take advantage of two "dup"-suffixed strings:
 494 # x(((2n?)?re|c(har)?|n(re|m)|[mz])alloc|alloc_(oversized|die)|(mem|str)dup)
 495 # 2) notice that "c(har)?|[mz]" is equivalent to the shorter and more readable
 496 # "char|[cmz]"
 497 # x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
 498 _xa1 = x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
 499 _xa2 = X([CZ]|N?M)ALLOC
 500 sc_prohibit_xalloc_without_use:
 501         @h='xalloc.h' \
 502         re='\<($(_xa1)|$(_xa2)) *\('\
 503           $(_sc_header_without_use)
 504
 505 # Extract function names:
 506 # perl -lne '/^(?:extern )?(?:void|char) \*?(\w+) *\(/ and print $1' lib/hash.h
 507 _hash_re = \
 508 clear|delete|free|get_(first|next)|insert|lookup|print_statistics|reset_tuning
 509 _hash_fn = \<($(_hash_re)) *\(
 510 _hash_struct = (struct )?\<[Hh]ash_(table|tuning)\>
 511 sc_prohibit_hash_without_use:
 512         @h='hash.h' \
 513         re='$(_hash_fn)|$(_hash_struct)'\
 514           $(_sc_header_without_use)
 515
 516 sc_prohibit_cloexec_without_use:
 517         @h='cloexec.h' re='\<(set_cloexec_flag|dup_cloexec) *\(' \
 518           $(_sc_header_without_use)
 519
 520 sc_prohibit_posixver_without_use:
 521         @h='posixver.h' re='\<posix2_version *\(' $(_sc_header_without_use)
 522
 523 sc_prohibit_same_without_use:
 524         @h='same.h' re='\<same_name *\(' $(_sc_header_without_use)
 525
 526 sc_prohibit_hash_pjw_without_use:
 527         @h='hash-pjw.h' \
 528         re='\<hash_pjw\>' \
 529           $(_sc_header_without_use)
 530
 531 sc_prohibit_safe_read_without_use:
 532         @h='safe-read.h' re='(\<SAFE_READ_ERROR\>|\<safe_read *\()' \
 533           $(_sc_header_without_use)
 534
 535 sc_prohibit_argmatch_without_use:
 536         @h='argmatch.h' \
 537         re='(\<(ARRAY_CARDINALITY|X?ARGMATCH(|_TO_ARGUMENT|_VERIFY))\>|\<(invalid_arg|argmatch(_exit_fn|_(in)?valid)?) *\()' \
 538           $(_sc_header_without_use)
 539
 540 sc_prohibit_canonicalize_without_use:
 541         @h='canonicalize.h' \
 542         re='CAN_(EXISTING|ALL_BUT_LAST|MISSING)|canonicalize_(mode_t|filename_mode|file_name)' \
 543           $(_sc_header_without_use)
 544
 545 sc_prohibit_root_dev_ino_without_use:
 546         @h='root-dev-ino.h' \
 547         re='(\<ROOT_DEV_INO_(CHECK|WARN)\>|\<get_root_dev_ino *\()' \
 548           $(_sc_header_without_use)
 549
 550 sc_prohibit_openat_without_use:
 551         @h='openat.h' \
 552         re='\<(openat_(permissive|needs_fchdir|(save|restore)_fail)|l?(stat|ch(own|mod))at|(euid)?accessat)\>' \
 553           $(_sc_header_without_use)
 554
 555 # Prohibit the inclusion of c-ctype.h without an actual use.
 556 ctype_re = isalnum|isalpha|isascii|isblank|iscntrl|isdigit|isgraph|islower\
 557 |isprint|ispunct|isspace|isupper|isxdigit|tolower|toupper
 558 sc_prohibit_c_ctype_without_use:
 559         @h='c-ctype.h' re='\<c_($(ctype_re)) *\(' \
 560           $(_sc_header_without_use)
 561
 562 _empty =
 563 _sp = $(_empty) $(_empty)
 564 # The following list was generated by running:
 565 # man signal.h|col -b|perl -ne '/bsd_signal.*;/.../sigwaitinfo.*;/ and print' \
 566 #   | perl -lne '/^\s+(?:int|void).*?(\w+).*/ and print $1' | fmt
 567 _sig_functions = \
 568   bsd_signal kill killpg pthread_kill pthread_sigmask raise sigaction \
 569   sigaddset sigaltstack sigdelset sigemptyset sigfillset sighold sigignore \
 570   siginterrupt sigismember signal sigpause sigpending sigprocmask sigqueue \
 571   sigrelse sigset sigsuspend sigtimedwait sigwait sigwaitinfo
 572 _sig_function_re = $(subst $(_sp),|,$(strip $(_sig_functions)))
 573 # The following were extracted from "man signal.h" manually.
 574 _sig_types_and_consts =                                                 \
 575   MINSIGSTKSZ SA_NOCLDSTOP SA_NOCLDWAIT SA_NODEFER SA_ONSTACK           \
 576   SA_RESETHAND SA_RESTART SA_SIGINFO SIGEV_NONE SIGEV_SIGNAL            \
 577   SIGEV_THREAD SIGSTKSZ SIG_BLOCK SIG_SETMASK SIG_UNBLOCK SS_DISABLE    \
 578   SS_ONSTACK mcontext_t pid_t sig_atomic_t sigevent siginfo_t sigset_t  \
 579   sigstack sigval stack_t ucontext_t
 580 # generated via this:
 581 # perl -lne '/^#ifdef (SIG\w+)/ and print $1' lib/sig2str.c|sort -u|fmt -70
 582 _sig_names =                                                            \
 583   SIGABRT SIGALRM SIGALRM1 SIGBUS SIGCANCEL SIGCHLD SIGCLD SIGCONT      \
 584   SIGDANGER SIGDIL SIGEMT SIGFPE SIGFREEZE SIGGRANT SIGHUP SIGILL       \
 585   SIGINFO SIGINT SIGIO SIGIOT SIGKAP SIGKILL SIGKILLTHR SIGLOST SIGLWP  \
 586   SIGMIGRATE SIGMSG SIGPHONE SIGPIPE SIGPOLL SIGPRE SIGPROF SIGPWR      \
 587   SIGQUIT SIGRETRACT SIGSAK SIGSEGV SIGSOUND SIGSTKFLT SIGSTOP SIGSYS   \
 588   SIGTERM SIGTHAW SIGTRAP SIGTSTP SIGTTIN SIGTTOU SIGURG SIGUSR1        \
 589   SIGUSR2 SIGVIRT SIGVTALRM SIGWAITING SIGWINCH SIGWIND SIGWINDOW       \
 590   SIGXCPU SIGXFSZ
 591 _sig_syms_re = $(subst $(_sp),|,$(strip $(_sig_names) $(_sig_types_and_consts)))
 592
 593 # Prohibit the inclusion of signal.h without an actual use.
 594 sc_prohibit_signal_without_use:
 595         @h='signal.h'                                                   \
 596         re='\<($(_sig_function_re)) *\(|\<($(_sig_syms_re))\>'          \
 597           $(_sc_header_without_use)
 598
 599 # Don't include stdio--.h unless you use one of its functions.
 600 sc_prohibit_stdio--_without_use:
 601         @h='stdio--.h' re='\<((f(re)?|p)open|tmpfile) *\('              \
 602           $(_sc_header_without_use)
 603
 604 # Don't include stdio-safer.h unless you use one of its functions.
 605 sc_prohibit_stdio-safer_without_use:
 606         @h='stdio-safer.h' re='\<((f(re)?|p)open|tmpfile)_safer *\('    \
 607           $(_sc_header_without_use)
 608
 609 # Prohibit the inclusion of strings.h without a sensible use.
 610 # Using the likes of bcmp, bcopy, bzero, index or rindex is not sensible.
 611 sc_prohibit_strings_without_use:
 612         @h='strings.h'                                                  \
 613         re='\<(strn?casecmp|ffs(ll)?)\>'                                \
 614           $(_sc_header_without_use)
 615
 616 # Get the list of symbol names with this:
 617 # perl -lne '/^# *define ([A-Z]\w+)\(/ and print $1' lib/intprops.h|fmt
 618 _intprops_names =                                                       \
 619   TYPE_IS_INTEGER TYPE_TWOS_COMPLEMENT TYPE_ONES_COMPLEMENT             \
 620   TYPE_SIGNED_MAGNITUDE TYPE_SIGNED TYPE_MINIMUM TYPE_MAXIMUM           \
 621   INT_BITS_STRLEN_BOUND INT_STRLEN_BOUND INT_BUFSIZE_BOUND              \
 622   INT_ADD_RANGE_OVERFLOW INT_SUBTRACT_RANGE_OVERFLOW                    \
 623   INT_NEGATE_RANGE_OVERFLOW INT_MULTIPLY_RANGE_OVERFLOW                 \
 624   INT_DIVIDE_RANGE_OVERFLOW INT_REMAINDER_RANGE_OVERFLOW                \
 625   INT_LEFT_SHIFT_RANGE_OVERFLOW INT_ADD_OVERFLOW INT_SUBTRACT_OVERFLOW  \
 626   INT_NEGATE_OVERFLOW INT_MULTIPLY_OVERFLOW INT_DIVIDE_OVERFLOW         \
 627   INT_REMAINDER_OVERFLOW INT_LEFT_SHIFT_OVERFLOW
 628 _intprops_syms_re = $(subst $(_sp),|,$(strip $(_intprops_names)))
 629 # Prohibit the inclusion of intprops.h without an actual use.
 630 sc_prohibit_intprops_without_use:
 631         @h='intprops.h'                                                 \
 632         re='\<($(_intprops_syms_re)) *\('                               \
 633           $(_sc_header_without_use)
 634
 635 _stddef_syms_re = NULL|offsetof|ptrdiff_t|size_t|wchar_t
 636 # Prohibit the inclusion of stddef.h without an actual use.
 637 sc_prohibit_stddef_without_use:
 638         @h='stddef.h'                                                   \
 639         re='\<($(_stddef_syms_re))\>'                                   \
 640           $(_sc_header_without_use)
 641
 642 _de1 = dirfd|(close|(fd)?open|read|rewind|seek|tell)dir(64)?(_r)?
 643 _de2 = (versionsort|struct dirent|getdirentries|alphasort|scandir(at)?)(64)?
 644 _de3 = MAXNAMLEN|DIR|ino_t|d_ino|d_fileno|d_namlen
 645 _dirent_syms_re = $(_de1)|$(_de2)|$(_de3)
 646 # Prohibit the inclusion of dirent.h without an actual use.
 647 sc_prohibit_dirent_without_use:
 648         @h='dirent.h'                                                   \
 649         re='\<($(_dirent_syms_re))\>'                                   \
 650           $(_sc_header_without_use)
 651
 652 # Prohibit the inclusion of verify.h without an actual use.
 653 sc_prohibit_verify_without_use:
 654         @h='verify.h'                                                   \
 655         re='\<(verify(true|expr)?|static_assert) *\('                   \
 656           $(_sc_header_without_use)
 657
 658 # Don't include xfreopen.h unless you use one of its functions.
 659 sc_prohibit_xfreopen_without_use:
 660         @h='xfreopen.h' re='\<xfreopen *\(' $(_sc_header_without_use)
 661
 662 sc_obsolete_symbols:
 663         @prohibit='\<(HAVE''_FCNTL_H|O''_NDELAY)\>'                     \
 664         halt='do not use HAVE''_FCNTL_H or O'_NDELAY                    \
 665           $(_sc_search_regexp)
 666
 667 # FIXME: warn about definitions of EXIT_FAILURE, EXIT_SUCCESS, STREQ
 668
 669 # Each nonempty ChangeLog line must start with a year number, or a TAB.
 670 sc_changelog:
 671         @prohibit='^[^12        ]'                                      \
 672         in_vc_files='^ChangeLog$$'                                      \
 673         halt='found unexpected prefix in a ChangeLog'                   \
 674           $(_sc_search_regexp)
 675
 676 # Ensure that each .c file containing a "main" function also
 677 # calls set_program_name.
 678 sc_program_name:
 679         @require='set_program_name *\(m?argv\[0\]\);'                   \
 680         in_vc_files='\.c$$'                                             \
 681         containing='\<main *('                                          \
 682         halt='the above files do not call set_program_name'             \
 683           $(_sc_search_regexp)
 684
 685 # Ensure that each .c file containing a "main" function also
 686 # calls bindtextdomain.
 687 sc_bindtextdomain:
 688         @require='bindtextdomain *\('                                   \
 689         in_vc_files='\.c$$'                                             \
 690         containing='\<main *('                                          \
 691         halt='the above files do not call bindtextdomain'               \
 692           $(_sc_search_regexp)
 693
 694 # Require that the final line of each test-lib.sh-using test be this one:
 695 # Exit $fail
 696 # Note: this test requires GNU grep's --label= option.
 697 Exit_witness_file ?= tests/test-lib.sh
 698 Exit_base := $(notdir $(Exit_witness_file))
 699 sc_require_test_exit_idiom:
 700         @if test -f $(srcdir)/$(Exit_witness_file); then                \
 701           die=0;                                                        \
 702           for i in $$(grep -l -F 'srcdir/$(Exit_base)'                  \
 703                 $$($(VC_LIST) tests)); do                               \
 704             tail -n1 $$i | grep '^Exit .' > /dev/null                   \
 705               && : || { die=1; echo $$i; }                              \
 706           done;                                                         \
 707           test $$die = 1 &&                                             \
 708             { echo 1>&2 '$(ME): the final line in each of the above is not:'; \
 709               echo 1>&2 'Exit something';                               \
 710               exit 1; } || :;                                           \
 711         fi
 712
 713 sc_trailing_blank:
 714         @prohibit='[     ]$$'                                           \
 715         halt='found trailing blank(s)'                                  \
 716           $(_sc_search_regexp)
 717
 718 # Match lines like the following, but where there is only one space
 719 # between the options and the description:
 720 #   -D, --all-repeated[=delimit-method]  print all duplicate lines\n
 721 longopt_re = --[a-z][0-9A-Za-z-]*(\[?=[0-9A-Za-z-]*\]?)?
 722 sc_two_space_separator_in_usage:
 723         @prohibit='^   *(-[A-Za-z],)? $(longopt_re) [^ ].*\\$$'         \
 724         halt='help2man requires at least two spaces between an option and its description'\
 725           $(_sc_search_regexp)
 726
 727 # A regexp matching function names like "error" that may be used
 728 # to emit translatable messages.
 729 _gl_translatable_diag_func_re ?= error
 730
 731 # Look for diagnostics that aren't marked for translation.
 732 # This won't find any for which error's format string is on a separate line.
 733 sc_unmarked_diagnostics:
 734         @prohibit='\<$(_gl_translatable_diag_func_re) *\([^"]*"[^"]*[a-z]{3}' \
 735         exclude='(_|ngettext ?)\('                                      \
 736         halt='$(ME): found unmarked diagnostic(s)'                      \
 737           $(_sc_search_regexp)
 738
 739 # Avoid useless parentheses like those in this example:
 740 # #if defined (SYMBOL) || defined (SYM2)
 741 sc_useless_cpp_parens:
 742         @prohibit='^# *if .*defined *\('                                \
 743         halt='found useless parentheses in cpp directive'               \
 744           $(_sc_search_regexp)
 745
 746 # List headers for which HAVE_HEADER_H is always true, assuming you are
 747 # using the appropriate gnulib module.  CAUTION: for each "unnecessary"
 748 # #if HAVE_HEADER_H that you remove, be sure that your project explicitly
 749 # requires the gnulib module that guarantees the usability of that header.
 750 gl_assured_headers_ = \
 751   cd $(gnulib_dir)/lib && echo *.in.h|sed 's/\.in\.h//g'
 752
 753 # Convert the list of names to upper case, and replace each space with "|".
 754 az_ = abcdefghijklmnopqrstuvwxyz
 755 AZ_ = ABCDEFGHIJKLMNOPQRSTUVWXYZ
 756 gl_header_upper_case_or_ =                                              \
 757   $$($(gl_assured_headers_)                                             \
 758     | tr $(az_)/.- $(AZ_)___                                            \
 759     | tr -s ' ' '|'                                                     \
 760     )
 761 sc_prohibit_always_true_header_tests:
 762         @or=$(gl_header_upper_case_or_);                                \
 763         re="HAVE_($$or)_H";                                             \
 764         prohibit='\<'"$$re"'\>'                                         \
 765         halt=$$(printf '%s\n'                                           \
 766         'do not test the above HAVE_<header>_H symbol(s);'              \
 767         '  with the corresponding gnulib module, they are always true') \
 768           $(_sc_search_regexp)
 769
 770 # ==================================================================
 771 gl_other_headers_ ?= \
 772   intprops.h    \
 773   openat.h      \
 774   stat-macros.h
 775
 776 # Perl -lne code to extract "significant" cpp-defined symbols from a
 777 # gnulib header file, eliminating a few common false-positives.
 778 # The exempted names below are defined only conditionally in gnulib,
 779 # and hence sometimes must/may be defined in application code.
 780 gl_extract_significant_defines_ = \
 781   /^\# *define ([^_ (][^ (]*)(\s*\(|\s+\w+)/\
 782     && $$2 !~ /(?:rpl_|_used_without_)/\
 783     && $$1 !~ /^(?:NSIG|ENODATA)$$/\
 784     && $$1 !~ /^(?:SA_RESETHAND|SA_RESTART)$$/\
 785     and print $$1
 786
 787 # Create a list of regular expressions matching the names
 788 # of macros that are guaranteed to be defined by parts of gnulib.
 789 define def_sym_regex
 790         gen_h=$(gl_generated_headers_);                                 \
 791         (cd $(gnulib_dir)/lib;                                          \
 792           for f in *.in.h $(gl_other_headers_); do                      \
 793             test -f $$f                                                 \
 794               && perl -lne '$(gl_extract_significant_defines_)' $$f;    \
 795           done;                                                         \
 796         ) | sort -u                                                     \
 797           | sed 's/^/^ *# *(define|undef)  */;s/$$/\\>/'
 798 endef
 799
 800 # Don't define macros that we already get from gnulib header files.
 801 sc_prohibit_always-defined_macros:
 802         @if test -d $(gnulib_dir); then                                 \
 803           case $$(echo all: | grep -l -f - Makefile) in Makefile);; *)  \
 804             echo '$(ME): skipping $@: you lack GNU grep' 1>&2; exit 0;; \
 805           esac;                                                         \
 806           $(def_sym_regex) | grep -E -f - $$($(VC_LIST_EXCEPT))         \
 807             && { echo '$(ME): define the above via some gnulib .h file' \
 808                   1>&2;  exit 1; } || :;                                \
 809         fi
 810 # ==================================================================
 811
 812 # Prohibit checked in backup files.
 813 sc_prohibit_backup_files:
 814         @$(VC_LIST) | grep '~$$' &&                             \
 815           { echo '$(ME): found version controlled backup file' 1>&2;    \
 816             exit 1; } || :
 817
 818 # Require the latest GPL.
 819 sc_GPL_version:
 820         @prohibit='either ''version [^3]'                               \
 821         halt='GPL vN, N!=3'                                             \
 822           $(_sc_search_regexp)
 823
 824 # Require the latest GFDL.  Two regexp, since some .texi files end up
 825 # line wrapping between 'Free Documentation License,' and 'Version'.
 826 _GFDL_regexp = (Free ''Documentation.*Version 1\.[^3]|Version 1\.[^3] or any)
 827 sc_GFDL_version:
 828         @prohibit='$(_GFDL_regexp)'                                     \
 829         halt='GFDL vN, N!=3'                                            \
 830           $(_sc_search_regexp)
 831
 832 # Don't use Texinfo's @acronym{}.
 833 # http://lists.gnu.org/archive/html/bug-gnulib/2010-03/msg00321.html
 834 texinfo_suffix_re_ ?= \.(txi|texi(nfo)?)$$
 835 sc_texinfo_acronym:
 836         @prohibit='@acronym\{'                                          \
 837         in_vc_files='$(texinfo_suffix_re_)'                             \
 838         halt='found use of Texinfo @acronym{}'                          \
 839           $(_sc_search_regexp)
 840
 841 cvs_keywords = \
 842   Author|Date|Header|Id|Name|Locker|Log|RCSfile|Revision|Source|State
 843
 844 sc_prohibit_cvs_keyword:
 845         @prohibit='\$$($(cvs_keywords))\$$'                             \
 846         halt='do not use CVS keyword expansion'                         \
 847           $(_sc_search_regexp)
 848
 849 # This Perl code is slightly obfuscated.  Not only is each "$" doubled
 850 # because it's in a Makefile, but the $$c's are comments;  we cannot
 851 # use "#" due to the way the script ends up concatenated onto one line.
 852 # It would be much more concise, and would produce better output (including
 853 # counts) if written as:
 854 #   perl -ln -0777 -e '/\n(\n+)$/ and print "$ARGV: ".length $1' ...
 855 # but that would be far less efficient, reading the entire contents
 856 # of each file, rather than just the last two bytes of each.
 857 # In addition, while the code below detects both blank lines and a missing
 858 # newline at EOF, the above detects only the former.
 859 #
 860 # This is a perl script that is expected to be the single-quoted argument
 861 # to a command-line "-le".  The remaining arguments are file names.
 862 # Print the name of each file that does not end in exactly one newline byte.
 863 # I.e., warn if there are blank lines (2 or more newlines), or if the
 864 # last byte is not a newline.  However, currently we don't complain
 865 # about any file that contains exactly one byte.
 866 # Exit nonzero if at least one such file is found, otherwise, exit 0.
 867 # Warn about, but otherwise ignore open failure.  Ignore seek/read failure.
 868 #
 869 # Use this if you want to remove trailing empty lines from selected files:
 870 #   perl -pi -0777 -e 's/\n\n+$/\n/' files...
 871 #
 872 require_exactly_one_NL_at_EOF_ =                                        \
 873   foreach my $$f (@ARGV)                                                \
 874     {                                                                   \
 875       open F, "<", $$f or (warn "failed to open $$f: $$!\n"), next;     \
 876       my $$p = sysseek (F, -2, 2);                                      \
 877       my $$c = "seek failure probably means file has < 2 bytes; ignore"; \
 878       my $$last_two_bytes;                                              \
 879       defined $$p and $$p = sysread F, $$last_two_bytes, 2;             \
 880       close F;                                                          \
 881       $$c = "ignore read failure";                                      \
 882       $$p && ($$last_two_bytes eq "\n\n"                                \
 883               || substr ($$last_two_bytes,1) ne "\n")                   \
 884           and (print $$f), $$fail=1;                                    \
 885     }                                                                   \
 886   END { exit defined $$fail }
 887 sc_prohibit_empty_lines_at_EOF:
 888         @perl -le '$(require_exactly_one_NL_at_EOF_)' $$($(VC_LIST_EXCEPT)) \
 889           || { echo '$(ME): empty line(s) or no newline at EOF'         \
 890                 1>&2; exit 1; } || :
 891
 892 # Make sure we don't use st_blocks.  Use ST_NBLOCKS instead.
 893 # This is a bit of a kludge, since it prevents use of the string
 894 # even in comments, but for now it does the job with no false positives.
 895 sc_prohibit_stat_st_blocks:
 896         @prohibit='[.>]st_blocks'                                       \
 897         halt='do not use st_blocks; use ST_NBLOCKS'                     \
 898           $(_sc_search_regexp)
 899
 900 # Make sure we don't define any S_IS* macros in src/*.c files.
 901 # They're already defined via gnulib's sys/stat.h replacement.
 902 sc_prohibit_S_IS_definition:
 903         @prohibit='^ *# *define  *S_IS'                                 \
 904         halt='do not define S_IS* macros; include <sys/stat.h>'         \
 905           $(_sc_search_regexp)
 906
 907 # Perl block to convert a match to FILE_NAME:LINENO:TEST,
 908 # that is shared by two definitions below.
 909 perl_filename_lineno_text_ =                                            \
 910     -e '  {'                                                            \
 911     -e '    $$n = ($$` =~ tr/\n/\n/ + 1);'                              \
 912     -e '    ($$v = $$&) =~ s/\n/\\n/g;'                                 \
 913     -e '    print "$$ARGV:$$n:$$v\n";'                                  \
 914     -e '  }'
 915
 916 prohibit_doubled_word_RE_ ?= \
 917   /\b(then?|[iao]n|i[fst]|but|f?or|at|and|[dt]o)\s+\1\b/gims
 918 prohibit_doubled_word_ =                                                \
 919     -e 'while ($(prohibit_doubled_word_RE_))'                           \
 920     $(perl_filename_lineno_text_)
 921
 922 # Define this to a regular expression that matches
 923 # any filename:dd:match lines you want to ignore.
 924 # The default is to ignore no matches.
 925 ignore_doubled_word_match_RE_ ?= ^$$
 926
 927 sc_prohibit_doubled_word:
 928         @perl -n -0777 $(prohibit_doubled_word_) $$($(VC_LIST_EXCEPT))  \
 929           | grep -vE '$(ignore_doubled_word_match_RE_)'                 \
 930           | grep . && { echo '$(ME): doubled words' 1>&2; exit 1; } || :
 931
 932 # A regular expression matching undesirable combinations of words like
 933 # "can not"; this matches them even when the two words appear on different
 934 # lines, but not when there is an intervening delimiter like "#" or "*".
 935 prohibit_undesirable_word_seq_RE_ ?=                                    \
 936   /\bcan\s+not\b/gims
 937 prohibit_undesirable_word_seq_ =                                        \
 938     -e 'while ($(prohibit_undesirable_word_seq_RE_))'                   \
 939     $(perl_filename_lineno_text_)
 940 # Define this to a regular expression that matches
 941 # any filename:dd:match lines you want to ignore.
 942 # The default is to ignore no matches.
 943 ignore_undesirable_word_sequence_RE_ ?= ^$$
 944
 945 sc_prohibit_undesirable_word_seq:
 946         @perl -n -0777 $(prohibit_undesirable_word_seq_)                \
 947              $$($(VC_LIST_EXCEPT))                                      \
 948           | grep -vE '$(ignore_undesirable_word_sequence_RE_)' | grep . \
 949           && { echo '$(ME): undesirable word sequence' >&2; exit 1; } || :
 950
 951 _ptm1 = use "test C1 && test C2", not "test C1 -''a C2"
 952 _ptm2 = use "test C1 || test C2", not "test C1 -''o C2"
 953 # Using test's -a and -o operators is not portable.
 954 # We prefer test over [, since the latter is spelled [[ in configure.ac.
 955 sc_prohibit_test_minus_ao:
 956         @prohibit='(\<test| \[+) .+ -[ao] '                             \
 957         halt='$(_ptm1); $(_ptm2)'                                       \
 958           $(_sc_search_regexp)
 959
 960 # Avoid a test bashism.
 961 sc_prohibit_test_double_equal:
 962         @prohibit='(\<test| \[+) .+ == '                                \
 963         containing='#! */bin/[a-z]*sh'                                  \
 964         halt='use "test x = x", not "test x =''= x"'                    \
 965           $(_sc_search_regexp)
 966
 967 # Each program that uses proper_name_utf8 must link with one of the
 968 # ICONV libraries.  Otherwise, some ICONV library must appear in LDADD.
 969 # The perl -0777 invocation below extracts the possibly-multi-line
 970 # definition of LDADD from the appropriate Makefile.am and exits 0
 971 # when it contains "ICONV".
 972 sc_proper_name_utf8_requires_ICONV:
 973         @progs=$$(grep -l 'proper_name_utf8 ''("' $$($(VC_LIST_EXCEPT)));\
 974         if test "x$$progs" != x; then                                   \
 975           fail=0;                                                       \
 976           for p in $$progs; do                                          \
 977             dir=$$(dirname "$$p");                                      \
 978             perl -0777                                                  \
 979               -ne 'exit !(/^LDADD =(.+?[^\\]\n)/ms && $$1 =~ /ICONV/)'  \
 980               $$dir/Makefile.am && continue;                            \
 981             base=$$(basename "$$p" .c);                                 \
 982             grep "$${base}_LDADD.*ICONV)" $$dir/Makefile.am > /dev/null \
 983               || { fail=1; echo 1>&2 "$(ME): $$p uses proper_name_utf8"; }; \
 984           done;                                                         \
 985           test $$fail = 1 &&                                            \
 986             { echo 1>&2 '$(ME): the above do not link with any ICONV library'; \
 987               exit 1; } || :;                                           \
 988         fi
 989
 990 # Warn about "c0nst struct Foo const foo[]",
 991 # but not about "char const *const foo" or "#define const const".
 992 sc_redundant_const:
 993         @prohibit='\bconst\b[[:space:][:alnum:]]{2,}\bconst\b'          \
 994         halt='redundant "const" in declarations'                        \
 995           $(_sc_search_regexp)
 996
 997 sc_const_long_option:
 998         @prohibit='^ *static.*struct option '                           \
 999         exclude='const struct option|struct option const'               \
1000         halt='$(ME): add "const" to the above declarations'             \
1001           $(_sc_search_regexp)
1002
1003 NEWS_hash =                                                             \
1004   $$(sed -n '/^\*.* $(PREV_VERSION_REGEXP) ([0-9-]*)/,$$p'              \
1005        $(srcdir)/NEWS                                                   \
1006      | perl -0777 -pe                                                   \
1007         's/^Copyright.+?Free\sSoftware\sFoundation,\sInc\.\n//ms'       \
1008      | md5sum -                                                         \
1009      | sed 's/ .*//')
1010
1011 # Ensure that we don't accidentally insert an entry into an old NEWS block.
1012 sc_immutable_NEWS:
1013         @if test -f $(srcdir)/NEWS; then                                \
1014           test "$(NEWS_hash)" = '$(old_NEWS_hash)' && : ||              \
1015             { echo '$(ME): you have modified old NEWS' 1>&2; exit 1; }; \
1016         fi
1017
1018 # Update the hash stored above.  Do this after each release and
1019 # for any corrections to old entries.
1020 update-NEWS-hash: NEWS
1021         perl -pi -e 's/^(old_NEWS_hash[ \t]+:?=[ \t]+).*/$${1}'"$(NEWS_hash)/" \
1022           $(srcdir)/cfg.mk
1023
1024 # Ensure that we use only the standard $(VAR) notation,
1025 # not @...@ in Makefile.am, now that we can rely on automake
1026 # to emit a definition for each substituted variable.
1027 # However, there is still one case in which @VAR@ use is not just
1028 # legitimate, but actually required: when augmenting an automake-defined
1029 # variable with a prefix.  For example, gettext uses this:
1030 # MAKEINFO = env LANG= LC_MESSAGES= LC_ALL= LANGUAGE= @MAKEINFO@
1031 # otherwise, makeinfo would put German or French (current locale)
1032 # navigation hints in the otherwise-English documentation.
1033 #
1034 # Allow the package to add exceptions via a hook in cfg.mk;
1035 # for example, @PRAGMA_SYSTEM_HEADER@ can be permitted by
1036 # setting this to ' && !/PRAGMA_SYSTEM_HEADER/'.
1037 _makefile_at_at_check_exceptions ?=
1038 sc_makefile_at_at_check:
1039         @perl -ne '/\@\w+\@/'                                           \
1040           -e ' && !/(\w+)\s+=.*\@\1\@$$/'                               \
1041           -e ''$(_makefile_at_at_check_exceptions)                      \
1042           -e 'and (print "$$ARGV:$$.: $$_"), $$m=1; END {exit !$$m}'    \
1043             $$($(VC_LIST_EXCEPT) | grep -E '(^|/)(Makefile\.am|[^/]+\.mk)$$') \
1044           && { echo '$(ME): use $$(...), not @...@' 1>&2; exit 1; } || :
1045
1046 news-check: NEWS
1047         if sed -n $(news-check-lines-spec)p $(srcdir)/NEWS              \
1048             | grep -E $(news-check-regexp) >/dev/null; then             \
1049           :;                                                            \
1050         else                                                            \
1051           echo 'NEWS: $$(news-check-regexp) failed to match' 1>&2;      \
1052           exit 1;                                                       \
1053         fi
1054
1055 sc_makefile_TAB_only_indentation:
1056         @prohibit='^    [ ]{8}'                                         \
1057         in_vc_files='akefile|\.mk$$'                                    \
1058         halt='found TAB-8-space indentation'                            \
1059           $(_sc_search_regexp)
1060
1061 sc_m4_quote_check:
1062         @prohibit='(AC_DEFINE(_UNQUOTED)?|AC_DEFUN)\([^[]'              \
1063         in_vc_files='(^configure\.ac|\.m4)$$'                           \
1064         halt='quote the first arg to AC_DEF*'                           \
1065           $(_sc_search_regexp)
1066
1067 fix_po_file_diag = \
1068 'you have changed the set of files with translatable diagnostics;\n\
1069 apply the above patch\n'
1070
1071 # Verify that all source files using _() are listed in po/POTFILES.in.
1072 po_file ?= $(srcdir)/po/POTFILES.in
1073 generated_files ?= $(srcdir)/lib/*.[ch]
1074 sc_po_check:
1075         @if test -f $(po_file); then                                    \
1076           grep -E -v '^(#|$$)' $(po_file)                               \
1077             | grep -v '^src/false\.c$$' | sort > $@-1;                  \
1078           files=;                                                       \
1079           for file in $$($(VC_LIST_EXCEPT)) $(generated_files); do      \
1080             test -r $$file || continue;                                 \
1081             case $$file in                                              \
1082               *.m4|*.mk) continue ;;                                    \
1083               *.?|*.??) ;;                                              \
1084               *) continue;;                                             \
1085             esac;                                                       \
1086             case $$file in                                              \
1087             *.[ch])                                                     \
1088               base=`expr " $$file" : ' \(.*\)\..'`;                     \
1089               { test -f $$base.l || test -f $$base.y; } && continue;;   \
1090             esac;                                                       \
1091             files="$$files $$file";                                     \
1092           done;                                                         \
1093           grep -E -l '\b(N?_|gettext *)\([^)"]*("|$$)' $$files          \
1094             | sed 's|^$(_dot_escaped_srcdir)/||' | sort -u > $@-2;      \
1095           diff -u -L $(po_file) -L $(po_file) $@-1 $@-2                 \
1096             || { printf '$(ME): '$(fix_po_file_diag) 1>&2; exit 1; };   \
1097           rm -f $@-1 $@-2;                                              \
1098         fi
1099
1100 # Sometimes it is useful to change the PATH environment variable
1101 # in Makefiles.  When doing so, it's better not to use the Unix-centric
1102 # path separator of ':', but rather the automake-provided '$(PATH_SEPARATOR)'.
1103 msg = '$(ME): Do not use ":" above; use $$(PATH_SEPARATOR) instead'
1104 sc_makefile_path_separator_check:
1105         @prohibit='PATH[=].*:'                                          \
1106         in_vc_files='akefile|\.mk$$'                                    \
1107         halt=$(msg)                                                     \
1108           $(_sc_search_regexp)
1109
1110 # Check that 'make alpha' will not fail at the end of the process,
1111 # i.e., when pkg-M.N.tar.xz already exists (either in "." or in ../release)
1112 # and is read-only.
1113 writable-files:
1114         if test -d $(release_archive_dir); then                         \
1115           for file in $(DIST_ARCHIVES); do                              \
1116             for p in ./ $(release_archive_dir)/; do                     \
1117               test -e $$p$$file || continue;                            \
1118               test -w $$p$$file                                         \
1119                 || { echo ERROR: $$p$$file is not writable; fail=1; };  \
1120             done;                                                       \
1121           done;                                                         \
1122           test "$$fail" && exit 1 || : ;                                \
1123         else :;                                                         \
1124         fi
1125
1126 v_etc_file = $(gnulib_dir)/lib/version-etc.c
1127 sample-test = tests/sample-test
1128 texi = doc/$(PACKAGE).texi
1129 # Make sure that the copyright date in $(v_etc_file) is up to date.
1130 # Do the same for the $(sample-test) and the main doc/.texi file.
1131 sc_copyright_check:
1132         @require='enum { COPYRIGHT_YEAR = '$$(date +%Y)' };'            \
1133         in_files=$(v_etc_file)                                          \
1134         halt='out of date copyright in $(v_etc_file); update it'        \
1135           $(_sc_search_regexp)
1136         @require='# Copyright \(C\) '$$(date +%Y)' Free'                \
1137         in_vc_files=$(sample-test)                                      \
1138         halt='out of date copyright in $(sample-test); update it'       \
1139           $(_sc_search_regexp)
1140         @require='Copyright @copyright\{\} .*'$$(date +%Y)' Free'       \
1141         in_vc_files=$(texi)                                             \
1142         halt='out of date copyright in $(texi); update it'              \
1143           $(_sc_search_regexp)
1144
1145 # If tests/help-version exists and seems to be new enough, assume that its
1146 # use of init.sh and path_prepend_ is correct, and ensure that every other
1147 # use of init.sh is identical.
1148 # This is useful because help-version cross-checks prog --version
1149 # with $(VERSION), which verifies that its path_prepend_ invocation
1150 # sets PATH correctly.  This is an inexpensive way to ensure that
1151 # the other init.sh-using tests also get it right.
1152 _hv_file ?= $(srcdir)/tests/help-version
1153 _hv_regex_weak ?= ^ *\. .*/init\.sh"
1154 # Fix syntax-highlighters "
1155 _hv_regex_strong ?= ^ *\. "\$${srcdir=\.}/init\.sh"
1156 sc_cross_check_PATH_usage_in_tests:
1157         @if test -f $(_hv_file); then                                   \
1158           grep -l 'VERSION mismatch' $(_hv_file) >/dev/null             \
1159             || { echo "$@: skipped: no such file: $(_hv_file)" 1>&2;    \
1160                  exit 0; };                                             \
1161           grep -lE '$(_hv_regex_strong)' $(_hv_file) >/dev/null         \
1162             || { echo "$@: $(_hv_file) lacks conforming use of init.sh" 1>&2; \
1163                  exit 1; };                                             \
1164           good=$$(grep -E '$(_hv_regex_strong)' $(_hv_file));           \
1165           grep -LFx "$$good"                                            \
1166                 $$(grep -lE '$(_hv_regex_weak)' $$($(VC_LIST_EXCEPT)))  \
1167               | grep . &&                                               \
1168             { echo "$(ME): the above files use path_prepend_ inconsistently" \
1169                 1>&2; exit 1; } || :;                                   \
1170         fi
1171
1172 # BRE regex of file contents to identify a test script.
1173 _test_script_regex ?= \<init\.sh\>
1174
1175 # In tests, use "compare expected actual", not the reverse.
1176 sc_prohibit_reversed_compare_failure:
1177         @prohibit='\<compare [^ ]+ ([^ ]*exp|/dev/null)'                \
1178         containing='$(_test_script_regex)'                              \
1179         halt='reversed compare arguments'                               \
1180           $(_sc_search_regexp)
1181
1182 # #if HAVE_... will evaluate to false for any non numeric string.
1183 # That would be flagged by using -Wundef, however gnulib currently
1184 # tests many undefined macros, and so we can't enable that option.
1185 # So at least preclude common boolean strings as macro values.
1186 sc_Wundef_boolean:
1187         @prohibit='^#define.*(yes|no|true|false)$$'                     \
1188         in_files='$(CONFIG_INCLUDE)'                                    \
1189         halt='Use 0 or 1 for macro values'                              \
1190           $(_sc_search_regexp)
1191
1192 # Even if you use pathmax.h to guarantee that PATH_MAX is defined, it might
1193 # not be constant, or might overflow a stack.  In general, use PATH_MAX as
1194 # a limit, not an array or alloca size.
1195 sc_prohibit_path_max_allocation:
1196         @prohibit='(\balloca *\([^)]*|\[[^]]*)PATH_MAX'                 \
1197         halt='Avoid stack allocations of size PATH_MAX'                 \
1198           $(_sc_search_regexp)
1199
1200 sc_vulnerable_makefile_CVE-2009-4029:
1201         @prohibit='perm -777 -exec chmod a\+rwx|chmod 777 \$$\(distdir\)' \
1202         in_files=$$(find $(srcdir) -name Makefile.in)                   \
1203         halt=$$(printf '%s\n'                                           \
1204           'the above files are vulnerable; beware of running'           \
1205           '  "make dist*" rules, and upgrade to fixed automake'         \
1206           '  see http://bugzilla.redhat.com/542609 for details')        \
1207           $(_sc_search_regexp)
1208
1209 vc-diff-check:
1210         (unset CDPATH; cd $(srcdir) && $(VC) diff) > vc-diffs || :
1211         if test -s vc-diffs; then                               \
1212           cat vc-diffs;                                         \
1213           echo "Some files are locally modified:" 1>&2;         \
1214           exit 1;                                               \
1215         else                                                    \
1216           rm vc-diffs;                                          \
1217         fi
1218
1219 rel-files = $(DIST_ARCHIVES)
1220
1221 gnulib_dir ?= $(srcdir)/gnulib
1222 gnulib-version = $$(cd $(gnulib_dir) && git describe)
1223 bootstrap-tools ?= autoconf,automake,gnulib
1224
1225 # If it's not already specified, derive the GPG key ID from
1226 # the signed tag we've just applied to mark this release.
1227 gpg_key_ID ?= \
1228   $$(git cat-file tag v$(VERSION) \
1229      | gpgv --status-fd 1 --keyring /dev/null - - 2>/dev/null \
1230      | sed -n '/^\[GNUPG:\] ERRSIG /{s///;s/ .*//p;q}')
1231
1232 translation_project_ ?= coordinator@translationproject.org
1233
1234 # Make info-gnu the default only for a stable release.
1235 ifeq ($(RELEASE_TYPE),stable)
1236   announcement_Cc_ ?= $(translation_project_), $(PACKAGE_BUGREPORT)
1237   announcement_mail_headers_ ?=                                         \
1238     To: info-gnu@gnu.org                                                \
1239     Cc: $(announcement_Cc_)                                             \
1240     Mail-Followup-To: $(PACKAGE_BUGREPORT)
1241 else
1242   announcement_Cc_ ?= $(translation_project_)
1243   announcement_mail_headers_ ?=                                         \
1244     To: $(PACKAGE_BUGREPORT)                                            \
1245     Cc: $(announcement_Cc_)
1246 endif
1247
1248 announcement: NEWS ChangeLog $(rel-files)
1249         @$(srcdir)/$(_build-aux)/announce-gen                           \
1250             --mail-headers='$(announcement_mail_headers_)'              \
1251             --release-type=$(RELEASE_TYPE)                              \
1252             --package=$(PACKAGE)                                        \
1253             --prev=$(PREV_VERSION)                                      \
1254             --curr=$(VERSION)                                           \
1255             --gpg-key-id=$(gpg_key_ID)                                  \
1256             --news=$(srcdir)/NEWS                                       \
1257             --bootstrap-tools=$(bootstrap-tools)                        \
1258             $$(case ,$(bootstrap-tools), in (*,gnulib,*)                \
1259                echo --gnulib-version=$(gnulib-version);; esac)          \
1260             --no-print-checksums                                        \
1261             $(addprefix --url-dir=, $(url_dir_list))
1262
1263 ## ---------------- ##
1264 ## Updating files.  ##
1265 ## ---------------- ##
1266
1267 ftp-gnu = ftp://ftp.gnu.org/gnu
1268 www-gnu = http://www.gnu.org
1269
1270 upload_dest_dir_ ?= $(PACKAGE)
1271 emit_upload_commands:
1272         @echo =====================================
1273         @echo =====================================
1274         @echo "$(srcdir)/$(_build-aux)/gnupload $(GNUPLOADFLAGS) \\"
1275         @echo "    --to $(gnu_rel_host):$(upload_dest_dir_) \\"
1276         @echo "  $(rel-files)"
1277         @echo '# send the ~/announce-$(my_distdir) e-mail'
1278         @echo =====================================
1279         @echo =====================================
1280
1281 define emit-commit-log
1282   printf '%s\n' 'maint: post-release administrivia' ''                  \
1283     '* NEWS: Add header line for next release.'                         \
1284     '* .prev-version: Record previous version.'                         \
1285     '* cfg.mk (old_NEWS_hash): Auto-update.'
1286 endef
1287
1288 .PHONY: no-submodule-changes
1289 no-submodule-changes:
1290         if test -d $(srcdir)/.git; then                                 \
1291           diff=$$(cd $(srcdir) && git submodule -q foreach              \
1292                   git diff-index --name-only HEAD)                      \
1293             || exit 1;                                                  \
1294           case $$diff in '') ;;                                         \
1295             *) echo '$(ME): submodule files are locally modified:';     \
1296                 echo "$$diff"; exit 1;; esac;                           \
1297         else                                                            \
1298           : ;                                                           \
1299         fi
1300
1301 submodule-checks ?= no-submodule-changes public-submodule-commit
1302
1303 # Ensure that each sub-module commit we're using is public.
1304 # Without this, it is too easy to tag and release code that
1305 # cannot be built from a fresh clone.
1306 .PHONY: public-submodule-commit
1307 public-submodule-commit:
1308         $(AM_V_GEN)if test -d $(srcdir)/.git; then                      \
1309           cd $(srcdir) &&                                               \
1310           git submodule --quiet foreach test '$$(git rev-parse $$sha1)' \
1311               = '$$(git merge-base origin $$sha1)'                      \
1312             || { echo '$(ME): found non-public submodule commit' >&2;   \
1313                  exit 1; };                                             \
1314         else                                                            \
1315           : ;                                                           \
1316         fi
1317 # This rule has a high enough utility/cost ratio that it should be a
1318 # dependent of "check" by default.  However, some of us do occasionally
1319 # commit a temporary change that deliberately points to a non-public
1320 # submodule commit, and want to be able to use rules like "make check".
1321 # In that case, run e.g., "make check gl_public_submodule_commit="
1322 # to disable this test.
1323 gl_public_submodule_commit ?= public-submodule-commit
1324 check: $(gl_public_submodule_commit)
1325
1326 .PHONY: alpha beta stable
1327 ALL_RECURSIVE_TARGETS += alpha beta stable
1328 alpha beta stable: $(local-check) writable-files $(submodule-checks)
1329         test $@ = stable                                                \
1330           && { echo $(VERSION) | grep -E '^[0-9]+(\.[0-9]+)+$$'         \
1331                || { echo "invalid version string: $(VERSION)" 1>&2; exit 1;};}\
1332           || :
1333         $(MAKE) vc-diff-check
1334         $(MAKE) news-check
1335         $(MAKE) distcheck
1336         $(MAKE) dist
1337         $(MAKE) $(release-prep-hook) RELEASE_TYPE=$@
1338         $(MAKE) -s emit_upload_commands RELEASE_TYPE=$@
1339
1340 # Override this in cfg.mk if you follow different procedures.
1341 release-prep-hook ?= release-prep
1342
1343 gl_noteworthy_news_ = * Noteworthy changes in release ?.? (????-??-??) [?]
1344 .PHONY: release-prep
1345 release-prep:
1346         case $$RELEASE_TYPE in alpha|beta|stable) ;; \
1347           *) echo "invalid RELEASE_TYPE: $$RELEASE_TYPE" 1>&2; exit 1;; esac
1348         $(MAKE) --no-print-directory -s announcement > ~/announce-$(my_distdir)
1349         if test -d $(release_archive_dir); then                 \
1350           ln $(rel-files) $(release_archive_dir);               \
1351           chmod a-w $(rel-files);                               \
1352         fi
1353         echo $(VERSION) > $(prev_version_file)
1354         $(MAKE) update-NEWS-hash
1355         perl -pi -e '$$. == 3 and print "$(gl_noteworthy_news_)\n\n\n"' NEWS
1356         $(emit-commit-log) > .ci-msg
1357         $(VC) commit -F .ci-msg -a
1358         rm .ci-msg
1359
1360 # Override this with e.g., -s $(srcdir)/some_other_name.texi
1361 # if the default $(PACKAGE)-derived name doesn't apply.
1362 gendocs_options_ ?=
1363
1364 .PHONY: web-manual
1365 web-manual:
1366         @test -z "$(manual_title)" \
1367           && { echo define manual_title in cfg.mk 1>&2; exit 1; } || :
1368         @cd '$(srcdir)/doc'; \
1369           $(SHELL) ../$(_build-aux)/gendocs.sh $(gendocs_options_) \
1370              -o '$(abs_builddir)/doc/manual' \
1371              --email $(PACKAGE_BUGREPORT) $(PACKAGE) \
1372             "$(PACKAGE_NAME) - $(manual_title)"
1373         @echo " *** Upload the doc/manual directory to web-cvs."
1374
1375 # Code Coverage
1376
1377 init-coverage:
1378         $(MAKE) $(AM_MAKEFLAGS) clean
1379         lcov --directory . --zerocounters
1380
1381 COVERAGE_CCOPTS ?= "-g --coverage"
1382 COVERAGE_OUT ?= doc/coverage
1383
1384 build-coverage:
1385         $(MAKE) $(AM_MAKEFLAGS) CFLAGS=$(COVERAGE_CCOPTS) CXXFLAGS=$(COVERAGE_CCOPTS)
1386         $(MAKE) $(AM_MAKEFLAGS) CFLAGS=$(COVERAGE_CCOPTS) CXXFLAGS=$(COVERAGE_CCOPTS) check
1387         mkdir -p $(COVERAGE_OUT)
1388         lcov --directory . --output-file $(COVERAGE_OUT)/$(PACKAGE).info \
1389                 --capture
1390
1391 gen-coverage:
1392         genhtml --output-directory $(COVERAGE_OUT) \
1393                 $(COVERAGE_OUT)/$(PACKAGE).info \
1394                 --highlight --frames --legend \
1395                 --title "$(PACKAGE_NAME)"
1396
1397 coverage: init-coverage build-coverage gen-coverage
1398
1399 # Update gettext files.
1400 PACKAGE ?= $(shell basename $(PWD))
1401 PO_DOMAIN ?= $(PACKAGE)
1402 POURL = http://translationproject.org/latest/$(PO_DOMAIN)/
1403 PODIR ?= po
1404 refresh-po:
1405         rm -f $(PODIR)/*.po && \
1406         echo "$(ME): getting translations into po (please ignore the robots.txt ERROR 404)..." && \
1407         wget --no-verbose --directory-prefix $(PODIR) --no-directories --recursive --level 1 --accept .po --accept .po.1 $(POURL) && \
1408         echo 'en@boldquot' > $(PODIR)/LINGUAS && \
1409         echo 'en@quot' >> $(PODIR)/LINGUAS && \
1410         ls $(PODIR)/*.po | sed 's/\.po//' | sed 's,$(PODIR)/,,' | sort >> $(PODIR)/LINGUAS
1411
1412  # Running indent once is not idempotent, but running it twice is.
1413 INDENT_SOURCES ?= $(C_SOURCES)
1414 .PHONY: indent
1415 indent:
1416         indent $(INDENT_SOURCES)
1417         indent $(INDENT_SOURCES)
1418
1419 # If you want to set UPDATE_COPYRIGHT_* environment variables,
1420 # put the assignments in this variable.
1421 update-copyright-env ?=
1422
1423 # Run this rule once per year (usually early in January)
1424 # to update all FSF copyright year lists in your project.
1425 # If you have an additional project-specific rule,
1426 # add it in cfg.mk along with a line 'update-copyright: prereq'.
1427 # By default, exclude all variants of COPYING; you can also
1428 # add exemptions (such as ChangeLog..* for rotated change logs)
1429 # in the file .x-update-copyright.
1430 .PHONY: update-copyright
1431 update-copyright:
1432         grep -l -w Copyright                                             \
1433           $$(export VC_LIST_EXCEPT_DEFAULT=COPYING && $(VC_LIST_EXCEPT)) \
1434           | $(update-copyright-env) xargs $(srcdir)/$(_build-aux)/$@
1435
1436 # This tight_scope test is skipped with a warning if $(_gl_TS_headers) is not
1437 # overridden and $(_gl_TS_dir)/Makefile.am does not mention noinst_HEADERS.
1438
1439 # NOTE: to override any _gl_TS_* default value, you must
1440 # define the variable(s) using "export" in cfg.mk.
1441 _gl_TS_dir ?= src
1442
1443 ALL_RECURSIVE_TARGETS += sc_tight_scope
1444 sc_tight_scope: tight-scope.mk
1445         @fail=0;                                                        \
1446         if ! grep '^ *export _gl_TS_headers *=' $(srcdir)/cfg.mk        \
1447                 > /dev/null                                             \
1448            && ! grep -w noinst_HEADERS $(srcdir)/$(_gl_TS_dir)/Makefile.am \
1449                 > /dev/null 2>&1; then                                  \
1450             echo '$(ME): skipping $@';                                  \
1451         else                                                            \
1452             $(MAKE) -s -C $(_gl_TS_dir)                                 \
1453                 -f Makefile                                             \
1454                 -f $(abs_top_srcdir)/cfg.mk                             \
1455                 -f $(abs_top_builddir)/$<                               \
1456               _gl_tight_scope                                           \
1457                 || fail=1;                                              \
1458         fi;                                                             \
1459         rm -f $<;                                                       \
1460         exit $$fail
1461
1462 tight-scope.mk: $(ME)
1463         @rm -f $@ $@-t
1464         @perl -ne '/^# TS-start/.../^# TS-end/ and print' $(srcdir)/$(ME) > $@-t
1465         @chmod a=r $@-t && mv $@-t $@
1466
1467 ifeq (a,b)
1468 # TS-start
1469
1470 # Most functions should have static scope.
1471 # Any that don't must be marked with 'extern', but 'main'
1472 # and 'usage' are exceptions: they're always extern, but
1473 # do not need to be marked.  Symbols matching '__.*' are
1474 # reserved by the compiler, so are automatically excluded below.
1475 _gl_TS_unmarked_extern_functions ?= main usage
1476 _gl_TS_function_match ?= /^(?:$(_gl_TS_extern)) +.*?(\S+) *\(/
1477
1478 # If your project uses a macro like "XTERN", then put
1479 # the following in cfg.mk to override this default:
1480 # export _gl_TS_extern = extern|XTERN
1481 _gl_TS_extern ?= extern
1482
1483 # The second nm|grep checks for file-scope variables with 'extern' scope.
1484 # Without gnulib's progname module, you might put program_name here.
1485 # Symbols matching '__.*' are reserved by the compiler,
1486 # so are automatically excluded below.
1487 _gl_TS_unmarked_extern_vars ?=
1488
1489 # NOTE: the _match variables are perl expressions -- not mere regular
1490 # expressions -- so that you can extend them to match other patterns
1491 # and easily extract matched variable names.
1492 # For example, if your project declares some global variables via
1493 # a macro like this: GLOBAL(type, var_name, initializer), then you
1494 # can override this definition to automatically extract those names:
1495 # export _gl_TS_var_match = \
1496 #   /^(?:$(_gl_TS_extern)) .*?\**(\w+)(\[.*?\])?;/ || /\bGLOBAL\(.*?,\s*(.*?),/
1497 _gl_TS_var_match ?= /^(?:$(_gl_TS_extern)) .*?(\w+)(\[.*?\])?;/
1498
1499 # The names of object files in (or relative to) $(_gl_TS_dir).
1500 _gl_TS_obj_files ?= *.$(OBJEXT)
1501
1502 # Files in which to search for the one-line style extern declarations.
1503 # $(_gl_TS_dir)-relative.
1504 _gl_TS_headers ?= $(noinst_HEADERS)
1505
1506 .PHONY: _gl_tight_scope
1507 _gl_tight_scope: $(bin_PROGRAMS)
1508         t=exceptions-$$$$;                                              \
1509         trap 's=$$?; rm -f $$t; exit $$s' 0;                            \
1510         for sig in 1 2 3 13 15; do                                      \
1511           eval "trap 'v=`expr $$sig + 128`; (exit $$v); exit $$v' $$sig"; \
1512         done;                                                           \
1513         src=`for f in $(SOURCES); do                                    \
1514                test -f $$f && d= || d=$(srcdir)/; echo $$d$$f; done`;   \
1515         hdr=`for f in $(_gl_TS_headers); do                             \
1516                test -f $$f && d= || d=$(srcdir)/; echo $$d$$f; done`;   \
1517         ( printf '^%s$$\n' '__.*' $(_gl_TS_unmarked_extern_functions);  \
1518           grep -h -A1 '^extern .*[^;]$$' $$src                          \
1519             | grep -vE '^(extern |--)' | sed 's/ .*//';                 \
1520           perl -lne                                                     \
1521              '$(_gl_TS_function_match) and print "^$$1\$$"' $$hdr;      \
1522         ) | sort -u > $$t;                                              \
1523         nm -e $(_gl_TS_obj_files) | sed -n 's/.* T //p'|grep -Ev -f $$t \
1524           && { echo the above functions should have static scope >&2;   \
1525                exit 1; } || : ;                                         \
1526         ( printf '^%s$$\n' '__.*' $(_gl_TS_unmarked_extern_vars);       \
1527           perl -lne '$(_gl_TS_var_match) and print "^$$1\$$"' $$hdr *.h \
1528         ) | sort -u > $$t;                                              \
1529         nm -e $(_gl_TS_obj_files) | sed -n 's/.* [BCDGRS] //p'          \
1530             | sort -u | grep -Ev -f $$t                                 \
1531           && { echo the above variables should have static scope >&2;   \
1532                exit 1; } || :
1533 # TS-end
1534 endif