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