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 $$(build_aux)")
  29 endif
  30
  31 # Helper variables.
  32 _empty =
  33 _sp = $(_empty) $(_empty)
  34
  35 # _equal,S1,S2
  36 # ------------
  37 # If S1 == S2, return S1, otherwise the empty string.
  38 _equal = $(and $(findstring $(1),$(2)),$(findstring $(2),$(1)))
  39
  40 # member-check,VARIABLE,VALID-VALUES
  41 # ----------------------------------
  42 # Check that $(VARIABLE) is in the space-separated list of VALID-VALUES, and
  43 # return it.  Die otherwise.
  44 member-check =                                                          \
  45   $(strip                                                               \
  46     $(if $($(1)),                                                       \
  47       $(if $(findstring $(_sp),$($(1))),                                \
  48           $(error invalid $(1): '$($(1))', expected $(2)),              \
  49           $(or $(findstring $(_sp)$($(1))$(_sp),$(_sp)$(2)$(_sp)),      \
  50             $(error invalid $(1): '$($(1))', expected $(2)))),          \
  51       $(error $(1) undefined)))
  52
  53 # Do not save the original name or timestamp in the .tar.gz file.
  54 # Use --rsyncable if available.
  55 gzip_rsyncable := \
  56   $(shell gzip --help 2>/dev/null|grep rsyncable >/dev/null \
  57     && printf %s --rsyncable)
  58 GZIP_ENV = '--no-name --best $(gzip_rsyncable)'
  59
  60 GIT = git
  61 VC = $(GIT)
  62
  63 VC_LIST = $(srcdir)/$(_build-aux)/vc-list-files -C $(srcdir)
  64
  65 # You can override this variable in cfg.mk to set your own regexp
  66 # matching files to ignore.
  67 VC_LIST_ALWAYS_EXCLUDE_REGEX ?= ^$$
  68
  69 # This is to preprocess robustly the output of $(VC_LIST), so that even
  70 # when $(srcdir) is a pathological name like "....", the leading sed command
  71 # removes only the intended prefix.
  72 _dot_escaped_srcdir = $(subst .,\.,$(srcdir))
  73
  74 # Post-process $(VC_LIST) output, prepending $(srcdir)/, but only
  75 # when $(srcdir) is not ".".
  76 ifeq ($(srcdir),.)
  77   _prepend_srcdir_prefix =
  78 else
  79   _prepend_srcdir_prefix = | sed 's|^|$(srcdir)/|'
  80 endif
  81
  82 # In order to be able to consistently filter "."-relative names,
  83 # (i.e., with no $(srcdir) prefix), this definition is careful to
  84 # remove any $(srcdir) prefix, and to restore what it removes.
  85 _sc_excl = \
  86   $(or $(exclude_file_name_regexp--$@),^$$)
  87 VC_LIST_EXCEPT = \
  88   $(VC_LIST) | sed 's|^$(_dot_escaped_srcdir)/||' \
  89         | if test -f $(srcdir)/.x-$@; then grep -vEf $(srcdir)/.x-$@; \
  90           else grep -Ev -e "$${VC_LIST_EXCEPT_DEFAULT-ChangeLog}"; fi \
  91         | grep -Ev -e '($(VC_LIST_ALWAYS_EXCLUDE_REGEX)|$(_sc_excl))' \
  92         $(_prepend_srcdir_prefix)
  93
  94 ifeq ($(origin prev_version_file), undefined)
  95   prev_version_file = $(srcdir)/.prev-version
  96 endif
  97
  98 PREV_VERSION := $(shell cat $(prev_version_file) 2>/dev/null)
  99 VERSION_REGEXP = $(subst .,\.,$(VERSION))
 100 PREV_VERSION_REGEXP = $(subst .,\.,$(PREV_VERSION))
 101
 102 ifeq ($(VC),$(GIT))
 103   this-vc-tag = v$(VERSION)
 104   this-vc-tag-regexp = v$(VERSION_REGEXP)
 105 else
 106   tag-package = $(shell echo "$(PACKAGE)" | tr '[:lower:]' '[:upper:]')
 107   tag-this-version = $(subst .,_,$(VERSION))
 108   this-vc-tag = $(tag-package)-$(tag-this-version)
 109   this-vc-tag-regexp = $(this-vc-tag)
 110 endif
 111 my_distdir = $(PACKAGE)-$(VERSION)
 112
 113 # Old releases are stored here.
 114 release_archive_dir ?= ../release
 115
 116 # If RELEASE_TYPE is undefined, but RELEASE is, use its second word.
 117 # But overwrite VERSION.
 118 ifdef RELEASE
 119   VERSION := $(word 1, $(RELEASE))
 120   RELEASE_TYPE ?= $(word 2, $(RELEASE))
 121 endif
 122
 123 # Validate and return $(RELEASE_TYPE), or die.
 124 RELEASE_TYPES = alpha beta stable
 125 release-type = $(call member-check,RELEASE_TYPE,$(RELEASE_TYPES))
 126
 127 # Override gnu_rel_host and url_dir_list in cfg.mk if these are not right.
 128 # Use alpha.gnu.org for alpha and beta releases.
 129 # Use ftp.gnu.org for stable releases.
 130 gnu_ftp_host-alpha = alpha.gnu.org
 131 gnu_ftp_host-beta = alpha.gnu.org
 132 gnu_ftp_host-stable = ftp.gnu.org
 133 gnu_rel_host ?= $(gnu_ftp_host-$(release-type))
 134
 135 url_dir_list ?= $(if $(call _equal,$(gnu_rel_host),ftp.gnu.org),        \
 136                      http://ftpmirror.gnu.org/$(PACKAGE),               \
 137                      ftp://$(gnu_rel_host)/gnu/$(PACKAGE))
 138
 139 # Override this in cfg.mk if you are using a different format in your
 140 # NEWS file.
 141 today = $(shell date +%Y-%m-%d)
 142
 143 # Select which lines of NEWS are searched for $(news-check-regexp).
 144 # This is a sed line number spec.  The default says that we search
 145 # lines 1..10 of NEWS for $(news-check-regexp).
 146 # If you want to search only line 3 or only lines 20-22, use "3" or "20,22".
 147 news-check-lines-spec ?= 1,10
 148 news-check-regexp ?= '^\*.* $(VERSION_REGEXP) \($(today)\)'
 149
 150 # Prevent programs like 'sort' from considering distinct strings to be equal.
 151 # Doing it here saves us from having to set LC_ALL elsewhere in this file.
 152 export LC_ALL = C
 153
 154 ## --------------- ##
 155 ## Sanity checks.  ##
 156 ## --------------- ##
 157
 158 _cfg_mk := $(shell test -f $(srcdir)/cfg.mk && echo '$(srcdir)/cfg.mk')
 159
 160 # Collect the names of rules starting with 'sc_'.
 161 syntax-check-rules := $(sort $(shell sed -n 's/^\(sc_[a-zA-Z0-9_-]*\):.*/\1/p' \
 162                         $(srcdir)/$(ME) $(_cfg_mk)))
 163 .PHONY: $(syntax-check-rules)
 164
 165 ifeq ($(shell $(VC_LIST) >/dev/null 2>&1; echo $$?),0)
 166   local-checks-available += $(syntax-check-rules)
 167 else
 168   local-checks-available += no-vc-detected
 169 no-vc-detected:
 170         @echo "No version control files detected; skipping syntax check"
 171 endif
 172 .PHONY: $(local-checks-available)
 173
 174 # Arrange to print the name of each syntax-checking rule just before running it.
 175 $(syntax-check-rules): %: %.m
 176 sc_m_rules_ = $(patsubst %, %.m, $(syntax-check-rules))
 177 .PHONY: $(sc_m_rules_)
 178 $(sc_m_rules_):
 179         @echo $(patsubst sc_%.m, %, $@)
 180         @date +%s.%N > .sc-start-$(basename $@)
 181
 182 # Compute and print the elapsed time for each syntax-check rule.
 183 sc_z_rules_ = $(patsubst %, %.z, $(syntax-check-rules))
 184 .PHONY: $(sc_z_rules_)
 185 $(sc_z_rules_): %.z: %
 186         @end=$$(date +%s.%N);                                           \
 187         start=$$(cat .sc-start-$*);                                     \
 188         rm -f .sc-start-$*;                                             \
 189         awk -v s=$$start -v e=$$end                                     \
 190           'END {printf "%.2f $(patsubst sc_%,%,$*)\n", e - s}' < /dev/null
 191
 192 # The patsubst here is to replace each sc_% rule with its sc_%.z wrapper
 193 # that computes and prints elapsed time.
 194 local-check :=                                                          \
 195   $(patsubst sc_%, sc_%.z,                                              \
 196     $(filter-out $(local-checks-to-skip), $(local-checks-available)))
 197
 198 syntax-check: $(local-check)
 199
 200 # _sc_search_regexp
 201 #
 202 # This macro searches for a given construct in the selected files and
 203 # then takes some action.
 204 #
 205 # Parameters (shell variables):
 206 #
 207 #  prohibit | require
 208 #
 209 #     Regular expression (ERE) denoting either a forbidden construct
 210 #     or a required construct.  Those arguments are exclusive.
 211 #
 212 #  exclude
 213 #
 214 #     Regular expression (ERE) denoting lines to ignore that matched
 215 #     a prohibit construct.  For example, this can be used to exclude
 216 #     comments that mention why the nearby code uses an alternative
 217 #     construct instead of the simpler prohibited construct.
 218 #
 219 #  in_vc_files | in_files
 220 #
 221 #     grep-E-style regexp selecting the files to check.  For in_vc_files,
 222 #     the regexp is used to select matching files from the list of all
 223 #     version-controlled files; for in_files, it's from the names printed
 224 #     by "find $(srcdir)".  When neither is specified, use all files that
 225 #     are under version control.
 226 #
 227 #  containing | non_containing
 228 #
 229 #     Select the files (non) containing strings matching this regexp.
 230 #     If both arguments are specified then CONTAINING takes
 231 #     precedence.
 232 #
 233 #  with_grep_options
 234 #
 235 #     Extra options for grep.
 236 #
 237 #  ignore_case
 238 #
 239 #     Ignore case.
 240 #
 241 #  halt
 242 #
 243 #     Message to display before to halting execution.
 244 #
 245 # Finally, you may exempt files based on an ERE matching file names.
 246 # For example, to exempt from the sc_space_tab check all files with the
 247 # .diff suffix, set this Make variable:
 248 #
 249 # exclude_file_name_regexp--sc_space_tab = \.diff$
 250 #
 251 # Note that while this functionality is mostly inherited via VC_LIST_EXCEPT,
 252 # when filtering by name via in_files, we explicitly filter out matching
 253 # names here as well.
 254
 255 # Initialize each, so that envvar settings cannot interfere.
 256 export require =
 257 export prohibit =
 258 export exclude =
 259 export in_vc_files =
 260 export in_files =
 261 export containing =
 262 export non_containing =
 263 export halt =
 264 export with_grep_options =
 265
 266 # By default, _sc_search_regexp does not ignore case.
 267 export ignore_case =
 268 _ignore_case = $$(test -n "$$ignore_case" && printf %s -i || :)
 269
 270 define _sc_say_and_exit
 271    dummy=; : so we do not need a semicolon before each use;             \
 272    { printf '%s\n' "$(ME): $$msg" 1>&2; exit 1; };
 273 endef
 274
 275 define _sc_search_regexp
 276    dummy=; : so we do not need a semicolon before each use;             \
 277                                                                         \
 278    : Check arguments;                                                   \
 279    test -n "$$prohibit" && test -n "$$require"                          \
 280      && { msg='Cannot specify both prohibit and require'                \
 281           $(_sc_say_and_exit) } || :;                                   \
 282    test -z "$$prohibit" && test -z "$$require"                          \
 283      && { msg='Should specify either prohibit or require'               \
 284           $(_sc_say_and_exit) } || :;                                   \
 285    test -z "$$prohibit" && test -n "$$exclude"                          \
 286      && { msg='Use of exclude requires a prohibit pattern'              \
 287           $(_sc_say_and_exit) } || :;                                   \
 288    test -n "$$in_vc_files" && test -n "$$in_files"                      \
 289      && { msg='Cannot specify both in_vc_files and in_files'            \
 290           $(_sc_say_and_exit) } || :;                                   \
 291    test "x$$halt" != x                                                  \
 292      || { msg='halt not defined' $(_sc_say_and_exit) };                 \
 293                                                                         \
 294    : Filter by file name;                                               \
 295    if test -n "$$in_files"; then                                        \
 296      files=$$(find $(srcdir) | grep -E "$$in_files"                     \
 297               | grep -Ev '$(_sc_excl)');                                \
 298    else                                                                 \
 299      files=$$($(VC_LIST_EXCEPT));                                       \
 300      if test -n "$$in_vc_files"; then                                   \
 301        files=$$(echo "$$files" | grep -E "$$in_vc_files");              \
 302      fi;                                                                \
 303    fi;                                                                  \
 304                                                                         \
 305    : Filter by content;                                                 \
 306    test -n "$$files" && test -n "$$containing"                          \
 307      && { files=$$(grep -l "$$containing" $$files); } || :;             \
 308    test -n "$$files" && test -n "$$non_containing"                      \
 309      && { files=$$(grep -vl "$$non_containing" $$files); } || :;        \
 310                                                                         \
 311    : Check for the construct;                                           \
 312    if test -n "$$files"; then                                           \
 313      if test -n "$$prohibit"; then                                      \
 314        grep $$with_grep_options $(_ignore_case) -nE "$$prohibit" $$files \
 315          | grep -vE "$${exclude:-^$$}"                                  \
 316          && { msg="$$halt" $(_sc_say_and_exit) } || :;                  \
 317      else                                                               \
 318        grep $$with_grep_options $(_ignore_case) -LE "$$require" $$files \
 319            | grep .                                                     \
 320          && { msg="$$halt" $(_sc_say_and_exit) } || :;                  \
 321      fi                                                                 \
 322    else :;                                                              \
 323    fi || :;
 324 endef
 325
 326 sc_avoid_if_before_free:
 327         @$(srcdir)/$(_build-aux)/useless-if-before-free                 \
 328                 $(useless_free_options)                                 \
 329             $$($(VC_LIST_EXCEPT) | grep -v useless-if-before-free) &&   \
 330           { echo '$(ME): found useless "if" before "free" above' 1>&2;  \
 331             exit 1; } || :
 332
 333 sc_cast_of_argument_to_free:
 334         @prohibit='\<free *\( *\(' halt="don't cast free argument"      \
 335           $(_sc_search_regexp)
 336
 337 sc_cast_of_x_alloc_return_value:
 338         @prohibit='\*\) *x(m|c|re)alloc\>'                              \
 339         halt="don't cast x*alloc return value"                          \
 340           $(_sc_search_regexp)
 341
 342 sc_cast_of_alloca_return_value:
 343         @prohibit='\*\) *alloca\>'                                      \
 344         halt="don't cast alloca return value"                           \
 345           $(_sc_search_regexp)
 346
 347 sc_space_tab:
 348         @prohibit='[ ]  '                                               \
 349         halt='found SPACE-TAB sequence; remove the SPACE'               \
 350           $(_sc_search_regexp)
 351
 352 # Don't use *scanf or the old ato* functions in "real" code.
 353 # They provide no error checking mechanism.
 354 # Instead, use strto* functions.
 355 sc_prohibit_atoi_atof:
 356         @prohibit='\<([fs]?scanf|ato([filq]|ll)) *\('                           \
 357         halt='do not use *scan''f, ato''f, ato''i, ato''l, ato''ll or ato''q'   \
 358           $(_sc_search_regexp)
 359
 360 # Use STREQ rather than comparing strcmp == 0, or != 0.
 361 sp_ = strcmp *\(.+\)
 362 sc_prohibit_strcmp:
 363         @prohibit='! *strcmp *\(|\<$(sp_) *[!=]=|[!=]= *$(sp_)'         \
 364         exclude='# *define STRN?EQ\('                                   \
 365         halt='replace strcmp calls above with STREQ/STRNEQ'             \
 366           $(_sc_search_regexp)
 367
 368 # Really.  You don't want to use this function.
 369 # It may fail to NUL-terminate the destination,
 370 # and always NUL-pads out to the specified length.
 371 sc_prohibit_strncpy:
 372         @prohibit='\<strncpy *\('                                       \
 373         halt='do not use strncpy, period'                               \
 374           $(_sc_search_regexp)
 375
 376 # Pass EXIT_*, not number, to usage, exit, and error (when exiting)
 377 # Convert all uses automatically, via these two commands:
 378 # git grep -l '\<exit *(1)' \
 379 #  | grep -vEf .x-sc_prohibit_magic_number_exit \
 380 #  | xargs --no-run-if-empty \
 381 #      perl -pi -e 's/(^|[^.])\b(exit ?)\(1\)/$1$2(EXIT_FAILURE)/'
 382 # git grep -l '\<exit *(0)' \
 383 #  | grep -vEf .x-sc_prohibit_magic_number_exit \
 384 #  | xargs --no-run-if-empty \
 385 #      perl -pi -e 's/(^|[^.])\b(exit ?)\(0\)/$1$2(EXIT_SUCCESS)/'
 386 sc_prohibit_magic_number_exit:
 387         @prohibit='(^|[^.])\<(usage|exit|error) ?\(-?[0-9]+[,)]'        \
 388         exclude='exit \(77\)|error ?\(((0|77),|[^,]*)'                  \
 389         halt='use EXIT_* values rather than magic number'               \
 390           $(_sc_search_regexp)
 391
 392 # Using EXIT_SUCCESS as the first argument to error is misleading,
 393 # since when that parameter is 0, error does not exit.  Use '0' instead.
 394 sc_error_exit_success:
 395         @prohibit='error *\(EXIT_SUCCESS,'                              \
 396         in_vc_files='\.[chly]$$'                                        \
 397         halt='found error (EXIT_SUCCESS'                                \
 398          $(_sc_search_regexp)
 399
 400 # "FATAL:" should be fully upper-cased in error messages
 401 # "WARNING:" should be fully upper-cased, or fully lower-cased
 402 sc_error_message_warn_fatal:
 403         @grep -nEA2 '[^rp]error *\(' $$($(VC_LIST_EXCEPT))              \
 404             | grep -E '"Warning|"Fatal|"fatal' &&                       \
 405           { echo '$(ME): use FATAL, WARNING or warning' 1>&2;           \
 406             exit 1; } || :
 407
 408 # Error messages should not start with a capital letter
 409 sc_error_message_uppercase:
 410         @grep -nEA2 '[^rp]error *\(' $$($(VC_LIST_EXCEPT))              \
 411             | grep -E '"[A-Z]'                                          \
 412             | grep -vE '"FATAL|"WARNING|"Java|"C#|PRIuMAX' &&           \
 413           { echo '$(ME): found capitalized error message' 1>&2;         \
 414             exit 1; } || :
 415
 416 # Error messages should not end with a period
 417 sc_error_message_period:
 418         @grep -nEA2 '[^rp]error *\(' $$($(VC_LIST_EXCEPT))              \
 419             | grep -E '[^."]\."' &&                                     \
 420           { echo '$(ME): found error message ending in period' 1>&2;    \
 421             exit 1; } || :
 422
 423 sc_file_system:
 424         @prohibit=file''system                                          \
 425         ignore_case=1                                                   \
 426         halt='found use of "file''system"; spell it "file system"'      \
 427           $(_sc_search_regexp)
 428
 429 # Don't use cpp tests of this symbol.  All code assumes config.h is included.
 430 sc_prohibit_have_config_h:
 431         @prohibit='^# *if.*HAVE''_CONFIG_H'                             \
 432         halt='found use of HAVE''_CONFIG_H; remove'                     \
 433           $(_sc_search_regexp)
 434
 435 # Nearly all .c files must include <config.h>.  However, we also permit this
 436 # via inclusion of a package-specific header, if cfg.mk specified one.
 437 # config_h_header must be suitable for grep -E.
 438 config_h_header ?= <config\.h>
 439 sc_require_config_h:
 440         @require='^# *include $(config_h_header)'                       \
 441         in_vc_files='\.c$$'                                             \
 442         halt='the above files do not include <config.h>'                \
 443           $(_sc_search_regexp)
 444
 445 # You must include <config.h> before including any other header file.
 446 # This can possibly be via a package-specific header, if given by cfg.mk.
 447 sc_require_config_h_first:
 448         @if $(VC_LIST_EXCEPT) | grep -l '\.c$$' > /dev/null; then       \
 449           fail=0;                                                       \
 450           for i in $$($(VC_LIST_EXCEPT) | grep '\.c$$'); do             \
 451             grep '^# *include\>' $$i | sed 1q                           \
 452                 | grep -E '^# *include $(config_h_header)' > /dev/null  \
 453               || { echo $$i; fail=1; };                                 \
 454           done;                                                         \
 455           test $$fail = 1 &&                                            \
 456             { echo '$(ME): the above files include some other header'   \
 457                 'before <config.h>' 1>&2; exit 1; } || :;               \
 458         else :;                                                         \
 459         fi
 460
 461 sc_prohibit_HAVE_MBRTOWC:
 462         @prohibit='\bHAVE_MBRTOWC\b'                                    \
 463         halt="do not use $$prohibit; it is always defined"              \
 464           $(_sc_search_regexp)
 465
 466 # To use this "command" macro, you must first define two shell variables:
 467 # h: the header name, with no enclosing <> or ""
 468 # re: a regular expression that matches IFF something provided by $h is used.
 469 define _sc_header_without_use
 470   dummy=; : so we do not need a semicolon before each use;              \
 471   h_esc=`echo '[<"]'"$$h"'[">]'|sed 's/\./\\\\./g'`;                    \
 472   if $(VC_LIST_EXCEPT) | grep -l '\.c$$' > /dev/null; then              \
 473     files=$$(grep -l '^# *include '"$$h_esc"                            \
 474              $$($(VC_LIST_EXCEPT) | grep '\.c$$')) &&                   \
 475     grep -LE "$$re" $$files | grep . &&                                 \
 476       { echo "$(ME): the above files include $$h but don't use it"      \
 477         1>&2; exit 1; } || :;                                           \
 478   else :;                                                               \
 479   fi
 480 endef
 481
 482 # Prohibit the inclusion of assert.h without an actual use of assert.
 483 sc_prohibit_assert_without_use:
 484         @h='assert.h' re='\<assert *\(' $(_sc_header_without_use)
 485
 486 # Prohibit the inclusion of close-stream.h without an actual use.
 487 sc_prohibit_close_stream_without_use:
 488         @h='close-stream.h' re='\<close_stream *\(' $(_sc_header_without_use)
 489
 490 # Prohibit the inclusion of getopt.h without an actual use.
 491 sc_prohibit_getopt_without_use:
 492         @h='getopt.h' re='\<getopt(_long)? *\(' $(_sc_header_without_use)
 493
 494 # Don't include quotearg.h unless you use one of its functions.
 495 sc_prohibit_quotearg_without_use:
 496         @h='quotearg.h' re='\<quotearg(_[^ ]+)? *\(' $(_sc_header_without_use)
 497
 498 # Don't include quote.h unless you use one of its functions.
 499 sc_prohibit_quote_without_use:
 500         @h='quote.h' re='\<quote((_n)? *\(|_quoting_options\>)' \
 501           $(_sc_header_without_use)
 502
 503 # Don't include this header unless you use one of its functions.
 504 sc_prohibit_long_options_without_use:
 505         @h='long-options.h' re='\<parse_long_options *\(' \
 506           $(_sc_header_without_use)
 507
 508 # Don't include this header unless you use one of its functions.
 509 sc_prohibit_inttostr_without_use:
 510         @h='inttostr.h' re='\<(off|[iu]max|uint)tostr *\(' \
 511           $(_sc_header_without_use)
 512
 513 # Don't include this header unless you use one of its functions.
 514 sc_prohibit_ignore_value_without_use:
 515         @h='ignore-value.h' re='\<ignore_(value|ptr) *\(' \
 516           $(_sc_header_without_use)
 517
 518 # Don't include this header unless you use one of its functions.
 519 sc_prohibit_error_without_use:
 520         @h='error.h' \
 521         re='\<error(_at_line|_print_progname|_one_per_line|_message_count)? *\('\
 522           $(_sc_header_without_use)
 523
 524 # Don't include xalloc.h unless you use one of its functions.
 525 # Consider these symbols:
 526 # perl -lne '/^# *define (\w+)\(/ and print $1' lib/xalloc.h|grep -v '^__';
 527 # perl -lne '/^(?:extern )?(?:void|char) \*?(\w+) *\(/ and print $1' lib/xalloc.h
 528 # Divide into two sets on case, and filter each through this:
 529 # | sort | perl -MRegexp::Assemble -le \
 530 #  'print Regexp::Assemble->new(file => "/dev/stdin")->as_string'|sed 's/\?://g'
 531 # Note this was produced by the above:
 532 # _xa1 = \
 533 #x(((2n?)?re|c(har)?|n(re|m)|z)alloc|alloc_(oversized|die)|m(alloc|emdup)|strdup)
 534 # But we can do better, in at least two ways:
 535 # 1) take advantage of two "dup"-suffixed strings:
 536 # x(((2n?)?re|c(har)?|n(re|m)|[mz])alloc|alloc_(oversized|die)|(mem|str)dup)
 537 # 2) notice that "c(har)?|[mz]" is equivalent to the shorter and more readable
 538 # "char|[cmz]"
 539 # x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
 540 _xa1 = x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
 541 _xa2 = X([CZ]|N?M)ALLOC
 542 sc_prohibit_xalloc_without_use:
 543         @h='xalloc.h' \
 544         re='\<($(_xa1)|$(_xa2)) *\('\
 545           $(_sc_header_without_use)
 546
 547 # Extract function names:
 548 # perl -lne '/^(?:extern )?(?:void|char) \*?(\w+) *\(/ and print $1' lib/hash.h
 549 _hash_re = \
 550 clear|delete|free|get_(first|next)|insert|lookup|print_statistics|reset_tuning
 551 _hash_fn = \<($(_hash_re)) *\(
 552 _hash_struct = (struct )?\<[Hh]ash_(table|tuning)\>
 553 sc_prohibit_hash_without_use:
 554         @h='hash.h' \
 555         re='$(_hash_fn)|$(_hash_struct)'\
 556           $(_sc_header_without_use)
 557
 558 sc_prohibit_cloexec_without_use:
 559         @h='cloexec.h' re='\<(set_cloexec_flag|dup_cloexec) *\(' \
 560           $(_sc_header_without_use)
 561
 562 sc_prohibit_posixver_without_use:
 563         @h='posixver.h' re='\<posix2_version *\(' $(_sc_header_without_use)
 564
 565 sc_prohibit_same_without_use:
 566         @h='same.h' re='\<same_name *\(' $(_sc_header_without_use)
 567
 568 sc_prohibit_hash_pjw_without_use:
 569         @h='hash-pjw.h' \
 570         re='\<hash_pjw\>' \
 571           $(_sc_header_without_use)
 572
 573 sc_prohibit_safe_read_without_use:
 574         @h='safe-read.h' re='(\<SAFE_READ_ERROR\>|\<safe_read *\()' \
 575           $(_sc_header_without_use)
 576
 577 sc_prohibit_argmatch_without_use:
 578         @h='argmatch.h' \
 579         re='(\<(ARRAY_CARDINALITY|X?ARGMATCH(|_TO_ARGUMENT|_VERIFY))\>|\<(invalid_arg|argmatch(_exit_fn|_(in)?valid)?) *\()' \
 580           $(_sc_header_without_use)
 581
 582 sc_prohibit_canonicalize_without_use:
 583         @h='canonicalize.h' \
 584         re='CAN_(EXISTING|ALL_BUT_LAST|MISSING)|canonicalize_(mode_t|filename_mode|file_name)' \
 585           $(_sc_header_without_use)
 586
 587 sc_prohibit_root_dev_ino_without_use:
 588         @h='root-dev-ino.h' \
 589         re='(\<ROOT_DEV_INO_(CHECK|WARN)\>|\<get_root_dev_ino *\()' \
 590           $(_sc_header_without_use)
 591
 592 sc_prohibit_openat_without_use:
 593         @h='openat.h' \
 594         re='\<(openat_(permissive|needs_fchdir|(save|restore)_fail)|l?(stat|ch(own|mod))at|(euid)?accessat)\>' \
 595           $(_sc_header_without_use)
 596
 597 # Prohibit the inclusion of c-ctype.h without an actual use.
 598 ctype_re = isalnum|isalpha|isascii|isblank|iscntrl|isdigit|isgraph|islower\
 599 |isprint|ispunct|isspace|isupper|isxdigit|tolower|toupper
 600 sc_prohibit_c_ctype_without_use:
 601         @h='c-ctype.h' re='\<c_($(ctype_re)) *\(' \
 602           $(_sc_header_without_use)
 603
 604 # The following list was generated by running:
 605 # man signal.h|col -b|perl -ne '/bsd_signal.*;/.../sigwaitinfo.*;/ and print' \
 606 #   | perl -lne '/^\s+(?:int|void).*?(\w+).*/ and print $1' | fmt
 607 _sig_functions = \
 608   bsd_signal kill killpg pthread_kill pthread_sigmask raise sigaction \
 609   sigaddset sigaltstack sigdelset sigemptyset sigfillset sighold sigignore \
 610   siginterrupt sigismember signal sigpause sigpending sigprocmask sigqueue \
 611   sigrelse sigset sigsuspend sigtimedwait sigwait sigwaitinfo
 612 _sig_function_re = $(subst $(_sp),|,$(strip $(_sig_functions)))
 613 # The following were extracted from "man signal.h" manually.
 614 _sig_types_and_consts =                                                 \
 615   MINSIGSTKSZ SA_NOCLDSTOP SA_NOCLDWAIT SA_NODEFER SA_ONSTACK           \
 616   SA_RESETHAND SA_RESTART SA_SIGINFO SIGEV_NONE SIGEV_SIGNAL            \
 617   SIGEV_THREAD SIGSTKSZ SIG_BLOCK SIG_SETMASK SIG_UNBLOCK SS_DISABLE    \
 618   SS_ONSTACK mcontext_t pid_t sig_atomic_t sigevent siginfo_t sigset_t  \
 619   sigstack sigval stack_t ucontext_t
 620 # generated via this:
 621 # perl -lne '/^#ifdef (SIG\w+)/ and print $1' lib/sig2str.c|sort -u|fmt -70
 622 _sig_names =                                                            \
 623   SIGABRT SIGALRM SIGALRM1 SIGBUS SIGCANCEL SIGCHLD SIGCLD SIGCONT      \
 624   SIGDANGER SIGDIL SIGEMT SIGFPE SIGFREEZE SIGGRANT SIGHUP SIGILL       \
 625   SIGINFO SIGINT SIGIO SIGIOT SIGKAP SIGKILL SIGKILLTHR SIGLOST SIGLWP  \
 626   SIGMIGRATE SIGMSG SIGPHONE SIGPIPE SIGPOLL SIGPRE SIGPROF SIGPWR      \
 627   SIGQUIT SIGRETRACT SIGSAK SIGSEGV SIGSOUND SIGSTKFLT SIGSTOP SIGSYS   \
 628   SIGTERM SIGTHAW SIGTRAP SIGTSTP SIGTTIN SIGTTOU SIGURG SIGUSR1        \
 629   SIGUSR2 SIGVIRT SIGVTALRM SIGWAITING SIGWINCH SIGWIND SIGWINDOW       \
 630   SIGXCPU SIGXFSZ
 631 _sig_syms_re = $(subst $(_sp),|,$(strip $(_sig_names) $(_sig_types_and_consts)))
 632
 633 # Prohibit the inclusion of signal.h without an actual use.
 634 sc_prohibit_signal_without_use:
 635         @h='signal.h'                                                   \
 636         re='\<($(_sig_function_re)) *\(|\<($(_sig_syms_re))\>'          \
 637           $(_sc_header_without_use)
 638
 639 # Don't include stdio--.h unless you use one of its functions.
 640 sc_prohibit_stdio--_without_use:
 641         @h='stdio--.h' re='\<((f(re)?|p)open|tmpfile) *\('              \
 642           $(_sc_header_without_use)
 643
 644 # Don't include stdio-safer.h unless you use one of its functions.
 645 sc_prohibit_stdio-safer_without_use:
 646         @h='stdio-safer.h' re='\<((f(re)?|p)open|tmpfile)_safer *\('    \
 647           $(_sc_header_without_use)
 648
 649 # Prohibit the inclusion of strings.h without a sensible use.
 650 # Using the likes of bcmp, bcopy, bzero, index or rindex is not sensible.
 651 sc_prohibit_strings_without_use:
 652         @h='strings.h'                                                  \
 653         re='\<(strn?casecmp|ffs(ll)?)\>'                                \
 654           $(_sc_header_without_use)
 655
 656 # Get the list of symbol names with this:
 657 # perl -lne '/^# *define ([A-Z]\w+)\(/ and print $1' lib/intprops.h|fmt
 658 _intprops_names =                                                       \
 659   TYPE_IS_INTEGER TYPE_TWOS_COMPLEMENT TYPE_ONES_COMPLEMENT             \
 660   TYPE_SIGNED_MAGNITUDE TYPE_SIGNED TYPE_MINIMUM TYPE_MAXIMUM           \
 661   INT_BITS_STRLEN_BOUND INT_STRLEN_BOUND INT_BUFSIZE_BOUND              \
 662   INT_ADD_RANGE_OVERFLOW INT_SUBTRACT_RANGE_OVERFLOW                    \
 663   INT_NEGATE_RANGE_OVERFLOW INT_MULTIPLY_RANGE_OVERFLOW                 \
 664   INT_DIVIDE_RANGE_OVERFLOW INT_REMAINDER_RANGE_OVERFLOW                \
 665   INT_LEFT_SHIFT_RANGE_OVERFLOW INT_ADD_OVERFLOW INT_SUBTRACT_OVERFLOW  \
 666   INT_NEGATE_OVERFLOW INT_MULTIPLY_OVERFLOW INT_DIVIDE_OVERFLOW         \
 667   INT_REMAINDER_OVERFLOW INT_LEFT_SHIFT_OVERFLOW
 668 _intprops_syms_re = $(subst $(_sp),|,$(strip $(_intprops_names)))
 669 # Prohibit the inclusion of intprops.h without an actual use.
 670 sc_prohibit_intprops_without_use:
 671         @h='intprops.h'                                                 \
 672         re='\<($(_intprops_syms_re)) *\('                               \
 673           $(_sc_header_without_use)
 674
 675 _stddef_syms_re = NULL|offsetof|ptrdiff_t|size_t|wchar_t
 676 # Prohibit the inclusion of stddef.h without an actual use.
 677 sc_prohibit_stddef_without_use:
 678         @h='stddef.h'                                                   \
 679         re='\<($(_stddef_syms_re))\>'                                   \
 680           $(_sc_header_without_use)
 681
 682 _de1 = dirfd|(close|(fd)?open|read|rewind|seek|tell)dir(64)?(_r)?
 683 _de2 = (versionsort|struct dirent|getdirentries|alphasort|scandir(at)?)(64)?
 684 _de3 = MAXNAMLEN|DIR|ino_t|d_ino|d_fileno|d_namlen
 685 _dirent_syms_re = $(_de1)|$(_de2)|$(_de3)
 686 # Prohibit the inclusion of dirent.h without an actual use.
 687 sc_prohibit_dirent_without_use:
 688         @h='dirent.h'                                                   \
 689         re='\<($(_dirent_syms_re))\>'                                   \
 690           $(_sc_header_without_use)
 691
 692 # Prohibit the inclusion of verify.h without an actual use.
 693 sc_prohibit_verify_without_use:
 694         @h='verify.h'                                                   \
 695         re='\<(verify(true|expr)?|static_assert) *\('                   \
 696           $(_sc_header_without_use)
 697
 698 # Don't include xfreopen.h unless you use one of its functions.
 699 sc_prohibit_xfreopen_without_use:
 700         @h='xfreopen.h' re='\<xfreopen *\(' $(_sc_header_without_use)
 701
 702 sc_obsolete_symbols:
 703         @prohibit='\<(HAVE''_FCNTL_H|O''_NDELAY)\>'                     \
 704         halt='do not use HAVE''_FCNTL_H or O'_NDELAY                    \
 705           $(_sc_search_regexp)
 706
 707 # FIXME: warn about definitions of EXIT_FAILURE, EXIT_SUCCESS, STREQ
 708
 709 # Each nonempty ChangeLog line must start with a year number, or a TAB.
 710 sc_changelog:
 711         @prohibit='^[^12        ]'                                      \
 712         in_vc_files='^ChangeLog$$'                                      \
 713         halt='found unexpected prefix in a ChangeLog'                   \
 714           $(_sc_search_regexp)
 715
 716 # Ensure that each .c file containing a "main" function also
 717 # calls set_program_name.
 718 sc_program_name:
 719         @require='set_program_name *\(m?argv\[0\]\);'                   \
 720         in_vc_files='\.c$$'                                             \
 721         containing='\<main *('                                          \
 722         halt='the above files do not call set_program_name'             \
 723           $(_sc_search_regexp)
 724
 725 # Ensure that each .c file containing a "main" function also
 726 # calls bindtextdomain.
 727 sc_bindtextdomain:
 728         @require='bindtextdomain *\('                                   \
 729         in_vc_files='\.c$$'                                             \
 730         containing='\<main *('                                          \
 731         halt='the above files do not call bindtextdomain'               \
 732           $(_sc_search_regexp)
 733
 734 # Require that the final line of each test-lib.sh-using test be this one:
 735 # Exit $fail
 736 # Note: this test requires GNU grep's --label= option.
 737 Exit_witness_file ?= tests/test-lib.sh
 738 Exit_base := $(notdir $(Exit_witness_file))
 739 sc_require_test_exit_idiom:
 740         @if test -f $(srcdir)/$(Exit_witness_file); then                \
 741           die=0;                                                        \
 742           for i in $$(grep -l -F 'srcdir/$(Exit_base)'                  \
 743                 $$($(VC_LIST) tests)); do                               \
 744             tail -n1 $$i | grep '^Exit .' > /dev/null                   \
 745               && : || { die=1; echo $$i; }                              \
 746           done;                                                         \
 747           test $$die = 1 &&                                             \
 748             { echo 1>&2 '$(ME): the final line in each of the above is not:'; \
 749               echo 1>&2 'Exit something';                               \
 750               exit 1; } || :;                                           \
 751         fi
 752
 753 sc_trailing_blank:
 754         @prohibit='[     ]$$'                                           \
 755         halt='found trailing blank(s)'                                  \
 756         exclude='^Binary file .* matches$$'                             \
 757           $(_sc_search_regexp)
 758
 759 # Match lines like the following, but where there is only one space
 760 # between the options and the description:
 761 #   -D, --all-repeated[=delimit-method]  print all duplicate lines\n
 762 longopt_re = --[a-z][0-9A-Za-z-]*(\[?=[0-9A-Za-z-]*\]?)?
 763 sc_two_space_separator_in_usage:
 764         @prohibit='^   *(-[A-Za-z],)? $(longopt_re) [^ ].*\\$$'         \
 765         halt='help2man requires at least two spaces between an option and its description'\
 766           $(_sc_search_regexp)
 767
 768 # A regexp matching function names like "error" that may be used
 769 # to emit translatable messages.
 770 _gl_translatable_diag_func_re ?= error
 771
 772 # Look for diagnostics that aren't marked for translation.
 773 # This won't find any for which error's format string is on a separate line.
 774 sc_unmarked_diagnostics:
 775         @prohibit='\<$(_gl_translatable_diag_func_re) *\([^"]*"[^"]*[a-z]{3}' \
 776         exclude='(_|ngettext ?)\('                                      \
 777         halt='found unmarked diagnostic(s)'                             \
 778           $(_sc_search_regexp)
 779
 780 # Avoid useless parentheses like those in this example:
 781 # #if defined (SYMBOL) || defined (SYM2)
 782 sc_useless_cpp_parens:
 783         @prohibit='^# *if .*defined *\('                                \
 784         halt='found useless parentheses in cpp directive'               \
 785           $(_sc_search_regexp)
 786
 787 # List headers for which HAVE_HEADER_H is always true, assuming you are
 788 # using the appropriate gnulib module.  CAUTION: for each "unnecessary"
 789 # #if HAVE_HEADER_H that you remove, be sure that your project explicitly
 790 # requires the gnulib module that guarantees the usability of that header.
 791 gl_assured_headers_ = \
 792   cd $(gnulib_dir)/lib && echo *.in.h|sed 's/\.in\.h//g'
 793
 794 # Convert the list of names to upper case, and replace each space with "|".
 795 az_ = abcdefghijklmnopqrstuvwxyz
 796 AZ_ = ABCDEFGHIJKLMNOPQRSTUVWXYZ
 797 gl_header_upper_case_or_ =                                              \
 798   $$($(gl_assured_headers_)                                             \
 799     | tr $(az_)/.- $(AZ_)___                                            \
 800     | tr -s ' ' '|'                                                     \
 801     )
 802 sc_prohibit_always_true_header_tests:
 803         @or=$(gl_header_upper_case_or_);                                \
 804         re="HAVE_($$or)_H";                                             \
 805         prohibit='\<'"$$re"'\>'                                         \
 806         halt=$$(printf '%s\n'                                           \
 807         'do not test the above HAVE_<header>_H symbol(s);'              \
 808         '  with the corresponding gnulib module, they are always true') \
 809           $(_sc_search_regexp)
 810
 811 sc_prohibit_defined_have_decl_tests:
 812         @prohibit='#[    ]*if(n?def|.*\<defined)\>[      (]+HAVE_DECL_' \
 813         halt='HAVE_DECL macros are always defined'                      \
 814           $(_sc_search_regexp)
 815
 816 # ==================================================================
 817 gl_other_headers_ ?= \
 818   intprops.h    \
 819   openat.h      \
 820   stat-macros.h
 821
 822 # Perl -lne code to extract "significant" cpp-defined symbols from a
 823 # gnulib header file, eliminating a few common false-positives.
 824 # The exempted names below are defined only conditionally in gnulib,
 825 # and hence sometimes must/may be defined in application code.
 826 gl_extract_significant_defines_ = \
 827   /^\# *define ([^_ (][^ (]*)(\s*\(|\s+\w+)/\
 828     && $$2 !~ /(?:rpl_|_used_without_)/\
 829     && $$1 !~ /^(?:NSIG|ENODATA)$$/\
 830     && $$1 !~ /^(?:SA_RESETHAND|SA_RESTART)$$/\
 831     and print $$1
 832
 833 # Create a list of regular expressions matching the names
 834 # of macros that are guaranteed to be defined by parts of gnulib.
 835 define def_sym_regex
 836         gen_h=$(gl_generated_headers_);                                 \
 837         (cd $(gnulib_dir)/lib;                                          \
 838           for f in *.in.h $(gl_other_headers_); do                      \
 839             test -f $$f                                                 \
 840               && perl -lne '$(gl_extract_significant_defines_)' $$f;    \
 841           done;                                                         \
 842         ) | sort -u                                                     \
 843           | sed 's/^/^ *# *(define|undef)  */;s/$$/\\>/'
 844 endef
 845
 846 # Don't define macros that we already get from gnulib header files.
 847 sc_prohibit_always-defined_macros:
 848         @if test -d $(gnulib_dir); then                                 \
 849           case $$(echo all: | grep -l -f - Makefile) in Makefile);; *)  \
 850             echo '$(ME): skipping $@: you lack GNU grep' 1>&2; exit 0;; \
 851           esac;                                                         \
 852           $(def_sym_regex) | grep -E -f - $$($(VC_LIST_EXCEPT))         \
 853             && { echo '$(ME): define the above via some gnulib .h file' \
 854                   1>&2;  exit 1; } || :;                                \
 855         fi
 856 # ==================================================================
 857
 858 # Prohibit checked in backup files.
 859 sc_prohibit_backup_files:
 860         @$(VC_LIST) | grep '~$$' &&                             \
 861           { echo '$(ME): found version controlled backup file' 1>&2;    \
 862             exit 1; } || :
 863
 864 # Require the latest GPL.
 865 sc_GPL_version:
 866         @prohibit='either ''version [^3]'                               \
 867         halt='GPL vN, N!=3'                                             \
 868           $(_sc_search_regexp)
 869
 870 # Require the latest GFDL.  Two regexp, since some .texi files end up
 871 # line wrapping between 'Free Documentation License,' and 'Version'.
 872 _GFDL_regexp = (Free ''Documentation.*Version 1\.[^3]|Version 1\.[^3] or any)
 873 sc_GFDL_version:
 874         @prohibit='$(_GFDL_regexp)'                                     \
 875         halt='GFDL vN, N!=3'                                            \
 876           $(_sc_search_regexp)
 877
 878 # Don't use Texinfo's @acronym{}.
 879 # http://lists.gnu.org/archive/html/bug-gnulib/2010-03/msg00321.html
 880 texinfo_suffix_re_ ?= \.(txi|texi(nfo)?)$$
 881 sc_texinfo_acronym:
 882         @prohibit='@acronym\{'                                          \
 883         in_vc_files='$(texinfo_suffix_re_)'                             \
 884         halt='found use of Texinfo @acronym{}'                          \
 885           $(_sc_search_regexp)
 886
 887 cvs_keywords = \
 888   Author|Date|Header|Id|Name|Locker|Log|RCSfile|Revision|Source|State
 889
 890 sc_prohibit_cvs_keyword:
 891         @prohibit='\$$($(cvs_keywords))\$$'                             \
 892         halt='do not use CVS keyword expansion'                         \
 893           $(_sc_search_regexp)
 894
 895 # This Perl code is slightly obfuscated.  Not only is each "$" doubled
 896 # because it's in a Makefile, but the $$c's are comments;  we cannot
 897 # use "#" due to the way the script ends up concatenated onto one line.
 898 # It would be much more concise, and would produce better output (including
 899 # counts) if written as:
 900 #   perl -ln -0777 -e '/\n(\n+)$/ and print "$ARGV: ".length $1' ...
 901 # but that would be far less efficient, reading the entire contents
 902 # of each file, rather than just the last two bytes of each.
 903 # In addition, while the code below detects both blank lines and a missing
 904 # newline at EOF, the above detects only the former.
 905 #
 906 # This is a perl script that is expected to be the single-quoted argument
 907 # to a command-line "-le".  The remaining arguments are file names.
 908 # Print the name of each file that does not end in exactly one newline byte.
 909 # I.e., warn if there are blank lines (2 or more newlines), or if the
 910 # last byte is not a newline.  However, currently we don't complain
 911 # about any file that contains exactly one byte.
 912 # Exit nonzero if at least one such file is found, otherwise, exit 0.
 913 # Warn about, but otherwise ignore open failure.  Ignore seek/read failure.
 914 #
 915 # Use this if you want to remove trailing empty lines from selected files:
 916 #   perl -pi -0777 -e 's/\n\n+$/\n/' files...
 917 #
 918 require_exactly_one_NL_at_EOF_ =                                        \
 919   foreach my $$f (@ARGV)                                                \
 920     {                                                                   \
 921       open F, "<", $$f or (warn "failed to open $$f: $$!\n"), next;     \
 922       my $$p = sysseek (F, -2, 2);                                      \
 923       my $$c = "seek failure probably means file has < 2 bytes; ignore"; \
 924       my $$last_two_bytes;                                              \
 925       defined $$p and $$p = sysread F, $$last_two_bytes, 2;             \
 926       close F;                                                          \
 927       $$c = "ignore read failure";                                      \
 928       $$p && ($$last_two_bytes eq "\n\n"                                \
 929               || substr ($$last_two_bytes,1) ne "\n")                   \
 930           and (print $$f), $$fail=1;                                    \
 931     }                                                                   \
 932   END { exit defined $$fail }
 933 sc_prohibit_empty_lines_at_EOF:
 934         @perl -le '$(require_exactly_one_NL_at_EOF_)' $$($(VC_LIST_EXCEPT)) \
 935           || { echo '$(ME): empty line(s) or no newline at EOF'         \
 936                 1>&2; exit 1; } || :
 937
 938 # Make sure we don't use st_blocks.  Use ST_NBLOCKS instead.
 939 # This is a bit of a kludge, since it prevents use of the string
 940 # even in comments, but for now it does the job with no false positives.
 941 sc_prohibit_stat_st_blocks:
 942         @prohibit='[.>]st_blocks'                                       \
 943         halt='do not use st_blocks; use ST_NBLOCKS'                     \
 944           $(_sc_search_regexp)
 945
 946 # Make sure we don't define any S_IS* macros in src/*.c files.
 947 # They're already defined via gnulib's sys/stat.h replacement.
 948 sc_prohibit_S_IS_definition:
 949         @prohibit='^ *# *define  *S_IS'                                 \
 950         halt='do not define S_IS* macros; include <sys/stat.h>'         \
 951           $(_sc_search_regexp)
 952
 953 # Perl block to convert a match to FILE_NAME:LINENO:TEST,
 954 # that is shared by two definitions below.
 955 perl_filename_lineno_text_ =                                            \
 956     -e '  {'                                                            \
 957     -e '    $$n = ($$` =~ tr/\n/\n/ + 1);'                              \
 958     -e '    ($$v = $$&) =~ s/\n/\\n/g;'                                 \
 959     -e '    print "$$ARGV:$$n:$$v\n";'                                  \
 960     -e '  }'
 961
 962 prohibit_doubled_word_RE_ ?= \
 963   /\b(then?|[iao]n|i[fst]|but|f?or|at|and|[dt]o)\s+\1\b/gims
 964 prohibit_doubled_word_ =                                                \
 965     -e 'while ($(prohibit_doubled_word_RE_))'                           \
 966     $(perl_filename_lineno_text_)
 967
 968 # Define this to a regular expression that matches
 969 # any filename:dd:match lines you want to ignore.
 970 # The default is to ignore no matches.
 971 ignore_doubled_word_match_RE_ ?= ^$$
 972
 973 sc_prohibit_doubled_word:
 974         @perl -n -0777 $(prohibit_doubled_word_) $$($(VC_LIST_EXCEPT))  \
 975           | grep -vE '$(ignore_doubled_word_match_RE_)'                 \
 976           | grep . && { echo '$(ME): doubled words' 1>&2; exit 1; } || :
 977
 978 # A regular expression matching undesirable combinations of words like
 979 # "can not"; this matches them even when the two words appear on different
 980 # lines, but not when there is an intervening delimiter like "#" or "*".
 981 # Similarly undesirable, "See @xref{...}", since an @xref should start
 982 # a sentence.  Explicitly prohibit any prefix of "see" or "also".
 983 # Also prohibit a prefix matching "\w+ +".
 984 # @pxref gets the same see/also treatment and should be parenthesized;
 985 # presume it must *not* start a sentence.
 986 bad_xref_re_ ?= (?:[\w,:;] +|(?:see|also)\s+)\@xref\{
 987 bad_pxref_re_ ?= (?:[.!?]|(?:see|also))\s+\@pxref\{
 988 prohibit_undesirable_word_seq_RE_ ?=                                    \
 989   /(?:\bcan\s+not\b|$(bad_xref_re_)|$(bad_pxref_re_))/gims
 990 prohibit_undesirable_word_seq_ =                                        \
 991     -e 'while ($(prohibit_undesirable_word_seq_RE_))'                   \
 992     $(perl_filename_lineno_text_)
 993 # Define this to a regular expression that matches
 994 # any filename:dd:match lines you want to ignore.
 995 # The default is to ignore no matches.
 996 ignore_undesirable_word_sequence_RE_ ?= ^$$
 997
 998 sc_prohibit_undesirable_word_seq:
 999         @perl -n -0777 $(prohibit_undesirable_word_seq_)                \
1000              $$($(VC_LIST_EXCEPT))                                      \
1001           | grep -vE '$(ignore_undesirable_word_sequence_RE_)' | grep . \
1002           && { echo '$(ME): undesirable word sequence' >&2; exit 1; } || :
1003
1004 _ptm1 = use "test C1 && test C2", not "test C1 -''a C2"
1005 _ptm2 = use "test C1 || test C2", not "test C1 -''o C2"
1006 # Using test's -a and -o operators is not portable.
1007 # We prefer test over [, since the latter is spelled [[ in configure.ac.
1008 sc_prohibit_test_minus_ao:
1009         @prohibit='(\<test| \[+) .+ -[ao] '                             \
1010         halt='$(_ptm1); $(_ptm2)'                                       \
1011           $(_sc_search_regexp)
1012
1013 # Avoid a test bashism.
1014 sc_prohibit_test_double_equal:
1015         @prohibit='(\<test| \[+) .+ == '                                \
1016         containing='#! */bin/[a-z]*sh'                                  \
1017         halt='use "test x = x", not "test x =''= x"'                    \
1018           $(_sc_search_regexp)
1019
1020 # Each program that uses proper_name_utf8 must link with one of the
1021 # ICONV libraries.  Otherwise, some ICONV library must appear in LDADD.
1022 # The perl -0777 invocation below extracts the possibly-multi-line
1023 # definition of LDADD from the appropriate Makefile.am and exits 0
1024 # when it contains "ICONV".
1025 sc_proper_name_utf8_requires_ICONV:
1026         @progs=$$(grep -l 'proper_name_utf8 ''("' $$($(VC_LIST_EXCEPT)));\
1027         if test "x$$progs" != x; then                                   \
1028           fail=0;                                                       \
1029           for p in $$progs; do                                          \
1030             dir=$$(dirname "$$p");                                      \
1031             perl -0777                                                  \
1032               -ne 'exit !(/^LDADD =(.+?[^\\]\n)/ms && $$1 =~ /ICONV/)'  \
1033               $$dir/Makefile.am && continue;                            \
1034             base=$$(basename "$$p" .c);                                 \
1035             grep "$${base}_LDADD.*ICONV)" $$dir/Makefile.am > /dev/null \
1036               || { fail=1; echo 1>&2 "$(ME): $$p uses proper_name_utf8"; }; \
1037           done;                                                         \
1038           test $$fail = 1 &&                                            \
1039             { echo 1>&2 '$(ME): the above do not link with any ICONV library'; \
1040               exit 1; } || :;                                           \
1041         fi
1042
1043 # Warn about "c0nst struct Foo const foo[]",
1044 # but not about "char const *const foo" or "#define const const".
1045 sc_redundant_const:
1046         @prohibit='\bconst\b[[:space:][:alnum:]]{2,}\bconst\b'          \
1047         halt='redundant "const" in declarations'                        \
1048           $(_sc_search_regexp)
1049
1050 sc_const_long_option:
1051         @prohibit='^ *static.*struct option '                           \
1052         exclude='const struct option|struct option const'               \
1053         halt='add "const" to the above declarations'                    \
1054           $(_sc_search_regexp)
1055
1056 NEWS_hash =                                                             \
1057   $$(sed -n '/^\*.* $(PREV_VERSION_REGEXP) ([0-9-]*)/,$$p'              \
1058        $(srcdir)/NEWS                                                   \
1059      | perl -0777 -pe                                                   \
1060         's/^Copyright.+?Free\sSoftware\sFoundation,\sInc\.\n//ms'       \
1061      | md5sum -                                                         \
1062      | sed 's/ .*//')
1063
1064 # Ensure that we don't accidentally insert an entry into an old NEWS block.
1065 sc_immutable_NEWS:
1066         @if test -f $(srcdir)/NEWS; then                                \
1067           test "$(NEWS_hash)" = '$(old_NEWS_hash)' && : ||              \
1068             { echo '$(ME): you have modified old NEWS' 1>&2; exit 1; }; \
1069         fi
1070
1071 # Update the hash stored above.  Do this after each release and
1072 # for any corrections to old entries.
1073 update-NEWS-hash: NEWS
1074         perl -pi -e 's/^(old_NEWS_hash[ \t]+:?=[ \t]+).*/$${1}'"$(NEWS_hash)/" \
1075           $(srcdir)/cfg.mk
1076
1077 # Ensure that we use only the standard $(VAR) notation,
1078 # not @...@ in Makefile.am, now that we can rely on automake
1079 # to emit a definition for each substituted variable.
1080 # However, there is still one case in which @VAR@ use is not just
1081 # legitimate, but actually required: when augmenting an automake-defined
1082 # variable with a prefix.  For example, gettext uses this:
1083 # MAKEINFO = env LANG= LC_MESSAGES= LC_ALL= LANGUAGE= @MAKEINFO@
1084 # otherwise, makeinfo would put German or French (current locale)
1085 # navigation hints in the otherwise-English documentation.
1086 #
1087 # Allow the package to add exceptions via a hook in cfg.mk;
1088 # for example, @PRAGMA_SYSTEM_HEADER@ can be permitted by
1089 # setting this to ' && !/PRAGMA_SYSTEM_HEADER/'.
1090 _makefile_at_at_check_exceptions ?=
1091 sc_makefile_at_at_check:
1092         @perl -ne '/\@\w+\@/'                                           \
1093           -e ' && !/(\w+)\s+=.*\@\1\@$$/'                               \
1094           -e ''$(_makefile_at_at_check_exceptions)                      \
1095           -e 'and (print "$$ARGV:$$.: $$_"), $$m=1; END {exit !$$m}'    \
1096             $$($(VC_LIST_EXCEPT) | grep -E '(^|/)(Makefile\.am|[^/]+\.mk)$$') \
1097           && { echo '$(ME): use $$(...), not @...@' 1>&2; exit 1; } || :
1098
1099 news-check: NEWS
1100         $(AM_V_GEN)if sed -n $(news-check-lines-spec)p $<               \
1101             | grep -E $(news-check-regexp) >/dev/null; then             \
1102           :;                                                            \
1103         else                                                            \
1104           echo 'NEWS: $$(news-check-regexp) failed to match' 1>&2;      \
1105           exit 1;                                                       \
1106         fi
1107
1108 sc_makefile_TAB_only_indentation:
1109         @prohibit='^    [ ]{8}'                                         \
1110         in_vc_files='akefile|\.mk$$'                                    \
1111         halt='found TAB-8-space indentation'                            \
1112           $(_sc_search_regexp)
1113
1114 sc_m4_quote_check:
1115         @prohibit='(AC_DEFINE(_UNQUOTED)?|AC_DEFUN)\([^[]'              \
1116         in_vc_files='(^configure\.ac|\.m4)$$'                           \
1117         halt='quote the first arg to AC_DEF*'                           \
1118           $(_sc_search_regexp)
1119
1120 fix_po_file_diag = \
1121 'you have changed the set of files with translatable diagnostics;\n\
1122 apply the above patch\n'
1123
1124 # Verify that all source files using _() are listed in po/POTFILES.in.
1125 po_file ?= $(srcdir)/po/POTFILES.in
1126 generated_files ?= $(srcdir)/lib/*.[ch]
1127 sc_po_check:
1128         @if test -f $(po_file); then                                    \
1129           grep -E -v '^(#|$$)' $(po_file)                               \
1130             | grep -v '^src/false\.c$$' | sort > $@-1;                  \
1131           files=;                                                       \
1132           for file in $$($(VC_LIST_EXCEPT)) $(generated_files); do      \
1133             test -r $$file || continue;                                 \
1134             case $$file in                                              \
1135               *.m4|*.mk) continue ;;                                    \
1136               *.?|*.??) ;;                                              \
1137               *) continue;;                                             \
1138             esac;                                                       \
1139             case $$file in                                              \
1140             *.[ch])                                                     \
1141               base=`expr " $$file" : ' \(.*\)\..'`;                     \
1142               { test -f $$base.l || test -f $$base.y; } && continue;;   \
1143             esac;                                                       \
1144             files="$$files $$file";                                     \
1145           done;                                                         \
1146           grep -E -l '\b(N?_|gettext *)\([^)"]*("|$$)' $$files          \
1147             | sed 's|^$(_dot_escaped_srcdir)/||' | sort -u > $@-2;      \
1148           diff -u -L $(po_file) -L $(po_file) $@-1 $@-2                 \
1149             || { printf '$(ME): '$(fix_po_file_diag) 1>&2; exit 1; };   \
1150           rm -f $@-1 $@-2;                                              \
1151         fi
1152
1153 # Sometimes it is useful to change the PATH environment variable
1154 # in Makefiles.  When doing so, it's better not to use the Unix-centric
1155 # path separator of ':', but rather the automake-provided '$(PATH_SEPARATOR)'.
1156 msg = 'Do not use ":" above; use $$(PATH_SEPARATOR) instead'
1157 sc_makefile_path_separator_check:
1158         @prohibit='PATH[=].*:'                                          \
1159         in_vc_files='akefile|\.mk$$'                                    \
1160         halt=$(msg)                                                     \
1161           $(_sc_search_regexp)
1162
1163 # Check that 'make alpha' will not fail at the end of the process,
1164 # i.e., when pkg-M.N.tar.xz already exists (either in "." or in ../release)
1165 # and is read-only.
1166 writable-files:
1167         $(AM_V_GEN)if test -d $(release_archive_dir); then              \
1168           for file in $(DIST_ARCHIVES); do                              \
1169             for p in ./ $(release_archive_dir)/; do                     \
1170               test -e $$p$$file || continue;                            \
1171               test -w $$p$$file                                         \
1172                 || { echo ERROR: $$p$$file is not writable; fail=1; };  \
1173             done;                                                       \
1174           done;                                                         \
1175           test "$$fail" && exit 1 || : ;                                \
1176         else :;                                                         \
1177         fi
1178
1179 v_etc_file = $(gnulib_dir)/lib/version-etc.c
1180 sample-test = tests/sample-test
1181 texi = doc/$(PACKAGE).texi
1182 # Make sure that the copyright date in $(v_etc_file) is up to date.
1183 # Do the same for the $(sample-test) and the main doc/.texi file.
1184 sc_copyright_check:
1185         @require='enum { COPYRIGHT_YEAR = '$$(date +%Y)' };'            \
1186         in_files=$(v_etc_file)                                          \
1187         halt='out of date copyright in $(v_etc_file); update it'        \
1188           $(_sc_search_regexp)
1189         @require='# Copyright \(C\) '$$(date +%Y)' Free'                \
1190         in_vc_files=$(sample-test)                                      \
1191         halt='out of date copyright in $(sample-test); update it'       \
1192           $(_sc_search_regexp)
1193         @require='Copyright @copyright\{\} .*'$$(date +%Y)' Free'       \
1194         in_vc_files=$(texi)                                             \
1195         halt='out of date copyright in $(texi); update it'              \
1196           $(_sc_search_regexp)
1197
1198 # If tests/help-version exists and seems to be new enough, assume that its
1199 # use of init.sh and path_prepend_ is correct, and ensure that every other
1200 # use of init.sh is identical.
1201 # This is useful because help-version cross-checks prog --version
1202 # with $(VERSION), which verifies that its path_prepend_ invocation
1203 # sets PATH correctly.  This is an inexpensive way to ensure that
1204 # the other init.sh-using tests also get it right.
1205 _hv_file ?= $(srcdir)/tests/help-version
1206 _hv_regex_weak ?= ^ *\. .*/init\.sh"
1207 # Fix syntax-highlighters "
1208 _hv_regex_strong ?= ^ *\. "\$${srcdir=\.}/init\.sh"
1209 sc_cross_check_PATH_usage_in_tests:
1210         @if test -f $(_hv_file); then                                   \
1211           grep -l 'VERSION mismatch' $(_hv_file) >/dev/null             \
1212             || { echo "$@: skipped: no such file: $(_hv_file)" 1>&2;    \
1213                  exit 0; };                                             \
1214           grep -lE '$(_hv_regex_strong)' $(_hv_file) >/dev/null         \
1215             || { echo "$@: $(_hv_file) lacks conforming use of init.sh" 1>&2; \
1216                  exit 1; };                                             \
1217           good=$$(grep -E '$(_hv_regex_strong)' $(_hv_file));           \
1218           grep -LFx "$$good"                                            \
1219                 $$(grep -lE '$(_hv_regex_weak)' $$($(VC_LIST_EXCEPT)))  \
1220               | grep . &&                                               \
1221             { echo "$(ME): the above files use path_prepend_ inconsistently" \
1222                 1>&2; exit 1; } || :;                                   \
1223         fi
1224
1225 # BRE regex of file contents to identify a test script.
1226 _test_script_regex ?= \<init\.sh\>
1227
1228 # In tests, use "compare expected actual", not the reverse.
1229 sc_prohibit_reversed_compare_failure:
1230         @prohibit='\<compare [^ ]+ ([^ ]*exp|/dev/null)'                \
1231         containing='$(_test_script_regex)'                              \
1232         halt='reversed compare arguments'                               \
1233           $(_sc_search_regexp)
1234
1235 # #if HAVE_... will evaluate to false for any non numeric string.
1236 # That would be flagged by using -Wundef, however gnulib currently
1237 # tests many undefined macros, and so we can't enable that option.
1238 # So at least preclude common boolean strings as macro values.
1239 sc_Wundef_boolean:
1240         @prohibit='^#define.*(yes|no|true|false)$$'                     \
1241         in_files='$(CONFIG_INCLUDE)'                                    \
1242         halt='Use 0 or 1 for macro values'                              \
1243           $(_sc_search_regexp)
1244
1245 # Even if you use pathmax.h to guarantee that PATH_MAX is defined, it might
1246 # not be constant, or might overflow a stack.  In general, use PATH_MAX as
1247 # a limit, not an array or alloca size.
1248 sc_prohibit_path_max_allocation:
1249         @prohibit='(\balloca *\([^)]*|\[[^]]*)\bPATH_MAX'               \
1250         halt='Avoid stack allocations of size PATH_MAX'                 \
1251           $(_sc_search_regexp)
1252
1253 sc_vulnerable_makefile_CVE-2009-4029:
1254         @prohibit='perm -777 -exec chmod a\+rwx|chmod 777 \$$\(distdir\)' \
1255         in_files='(^|/)Makefile\.in$$'                                  \
1256         halt=$$(printf '%s\n'                                           \
1257           'the above files are vulnerable; beware of running'           \
1258           '  "make dist*" rules, and upgrade to fixed automake'         \
1259           '  see http://bugzilla.redhat.com/542609 for details')        \
1260           $(_sc_search_regexp)
1261
1262 sc_vulnerable_makefile_CVE-2012-3386:
1263         @prohibit='chmod a\+w \$$\(distdir\)'                           \
1264         in_files='(^|/)Makefile\.in$$'                                  \
1265         halt=$$(printf '%s\n'                                           \
1266           'the above files are vulnerable; beware of running'           \
1267           '  "make distcheck", and upgrade to fixed automake'           \
1268           '  see http://bugzilla.redhat.com/CVE-2012-3386 for details') \
1269           $(_sc_search_regexp)
1270
1271 vc-diff-check:
1272         $(AM_V_GEN)(unset CDPATH; cd $(srcdir) && $(VC) diff) > vc-diffs || :
1273         $(AM_V_at)if test -s vc-diffs; then                     \
1274           cat vc-diffs;                                         \
1275           echo "Some files are locally modified:" 1>&2;         \
1276           exit 1;                                               \
1277         else                                                    \
1278           rm vc-diffs;                                          \
1279         fi
1280
1281 rel-files = $(DIST_ARCHIVES)
1282
1283 gnulib_dir ?= $(srcdir)/gnulib
1284 gnulib-version = $$(cd $(gnulib_dir) && git describe)
1285 bootstrap-tools ?= autoconf,automake,gnulib
1286
1287 # If it's not already specified, derive the GPG key ID from
1288 # the signed tag we've just applied to mark this release.
1289 gpg_key_ID ?=                                                           \
1290   $$(cd $(srcdir)                                                       \
1291      && git cat-file tag v$(VERSION)                                    \
1292         | gpgv --status-fd 1 --keyring /dev/null - - 2>/dev/null        \
1293         | awk '/^\[GNUPG:\] ERRSIG / {print $$3; exit}')
1294
1295 translation_project_ ?= coordinator@translationproject.org
1296
1297 # Make info-gnu the default only for a stable release.
1298 announcement_Cc_stable = $(translation_project_), $(PACKAGE_BUGREPORT)
1299 announcement_mail_headers_stable =              \
1300   To: info-gnu@gnu.org                          \
1301   Cc: $(announcement_Cc_)                       \
1302   Mail-Followup-To: $(PACKAGE_BUGREPORT)
1303
1304 announcement_Cc_alpha = $(translation_project_)
1305 announcement_mail_headers_alpha =               \
1306   To: $(PACKAGE_BUGREPORT)                      \
1307   Cc: $(announcement_Cc_)
1308
1309 announcement_mail_Cc_beta = $(announcement_mail_Cc_alpha)
1310 announcement_mail_headers_beta = $(announcement_mail_headers_alpha)
1311
1312 announcement_mail_Cc_ ?= $(announcement_mail_Cc_$(release-type))
1313 announcement_mail_headers_ ?= $(announcement_mail_headers_$(release-type))
1314 announcement: NEWS ChangeLog $(rel-files)
1315 # Not $(AM_V_GEN) since the output of this command serves as
1316 # annoucement message: it would start with " GEN announcement".
1317         $(AM_V_at)$(srcdir)/$(_build-aux)/announce-gen                  \
1318             --mail-headers='$(announcement_mail_headers_)'              \
1319             --release-type=$(release-type)                              \
1320             --package=$(PACKAGE)                                        \
1321             --prev=$(PREV_VERSION)                                      \
1322             --curr=$(VERSION)                                           \
1323             --gpg-key-id=$(gpg_key_ID)                                  \
1324             --srcdir=$(srcdir)                                          \
1325             --news=$(srcdir)/NEWS                                       \
1326             --bootstrap-tools=$(bootstrap-tools)                        \
1327             $$(case ,$(bootstrap-tools), in (*,gnulib,*)                \
1328                echo --gnulib-version=$(gnulib-version);; esac)          \
1329             --no-print-checksums                                        \
1330             $(addprefix --url-dir=, $(url_dir_list))
1331
1332 .PHONY: release-commit
1333 release-commit:
1334         $(AM_V_GEN)cd $(srcdir)                         \
1335           && $(_build-aux)/do-release-commit-and-tag    \
1336                -C $(abs_builddir) $(RELEASE)
1337
1338 ## ---------------- ##
1339 ## Updating files.  ##
1340 ## ---------------- ##
1341
1342 ftp-gnu = ftp://ftp.gnu.org/gnu
1343 www-gnu = http://www.gnu.org
1344
1345 upload_dest_dir_ ?= $(PACKAGE)
1346 upload_command =                                                \
1347   $(srcdir)/$(_build-aux)/gnupload $(GNUPLOADFLAGS)             \
1348   --to $(gnu_rel_host):$(upload_dest_dir_)                      \
1349   $(rel-files)
1350 emit_upload_commands:
1351         @echo =====================================
1352         @echo =====================================
1353         @echo '$(upload_command)'
1354         @echo '# send the ~/announce-$(my_distdir) e-mail'
1355         @echo =====================================
1356         @echo =====================================
1357
1358 .PHONY: upload
1359 upload:
1360         $(AM_V_GEN)$(upload_command)
1361
1362 define emit-commit-log
1363   printf '%s\n' 'maint: post-release administrivia' ''                  \
1364     '* NEWS: Add header line for next release.'                         \
1365     '* .prev-version: Record previous version.'                         \
1366     '* cfg.mk (old_NEWS_hash): Auto-update.'
1367 endef
1368
1369 .PHONY: no-submodule-changes
1370 no-submodule-changes:
1371         $(AM_V_GEN)if test -d $(srcdir)/.git; then                      \
1372           diff=$$(cd $(srcdir) && git submodule -q foreach              \
1373                   git diff-index --name-only HEAD)                      \
1374             || exit 1;                                                  \
1375           case $$diff in '') ;;                                         \
1376             *) echo '$(ME): submodule files are locally modified:';     \
1377                 echo "$$diff"; exit 1;; esac;                           \
1378         else                                                            \
1379           : ;                                                           \
1380         fi
1381
1382 submodule-checks ?= no-submodule-changes public-submodule-commit
1383
1384 # Ensure that each sub-module commit we're using is public.
1385 # Without this, it is too easy to tag and release code that
1386 # cannot be built from a fresh clone.
1387 .PHONY: public-submodule-commit
1388 public-submodule-commit:
1389         $(AM_V_GEN)if test -d $(srcdir)/.git; then                      \
1390           cd $(srcdir) &&                                               \
1391           git submodule --quiet foreach test '$$(git rev-parse $$sha1)' \
1392               = '$$(git merge-base origin $$sha1)'                      \
1393             || { echo '$(ME): found non-public submodule commit' >&2;   \
1394                  exit 1; };                                             \
1395         else                                                            \
1396           : ;                                                           \
1397         fi
1398 # This rule has a high enough utility/cost ratio that it should be a
1399 # dependent of "check" by default.  However, some of us do occasionally
1400 # commit a temporary change that deliberately points to a non-public
1401 # submodule commit, and want to be able to use rules like "make check".
1402 # In that case, run e.g., "make check gl_public_submodule_commit="
1403 # to disable this test.
1404 gl_public_submodule_commit ?= public-submodule-commit
1405 check: $(gl_public_submodule_commit)
1406
1407 .PHONY: alpha beta stable release
1408 ALL_RECURSIVE_TARGETS += alpha beta stable
1409 alpha beta stable: $(local-check) writable-files $(submodule-checks)
1410         $(AM_V_GEN)test $@ = stable                                     \
1411           && { echo $(VERSION) | grep -E '^[0-9]+(\.[0-9]+)+$$'         \
1412                || { echo "invalid version string: $(VERSION)" 1>&2; exit 1;};}\
1413           || :
1414         $(AM_V_at)$(MAKE) vc-diff-check
1415         $(AM_V_at)$(MAKE) news-check
1416         $(AM_V_at)$(MAKE) distcheck
1417         $(AM_V_at)$(MAKE) dist
1418         $(AM_V_at)$(MAKE) $(release-prep-hook) RELEASE_TYPE=$@
1419         $(AM_V_at)$(MAKE) -s emit_upload_commands RELEASE_TYPE=$@
1420
1421 release:
1422         $(AM_V_GEN)$(MAKE) $(release-type)
1423
1424 # Override this in cfg.mk if you follow different procedures.
1425 release-prep-hook ?= release-prep
1426
1427 gl_noteworthy_news_ = * Noteworthy changes in release ?.? (????-??-??) [?]
1428 .PHONY: release-prep
1429 release-prep:
1430         $(AM_V_GEN)$(MAKE) --no-print-directory -s announcement \
1431           > ~/announce-$(my_distdir)
1432         $(AM_V_at)if test -d $(release_archive_dir); then       \
1433           ln $(rel-files) $(release_archive_dir);               \
1434           chmod a-w $(rel-files);                               \
1435         fi
1436         $(AM_V_at)echo $(VERSION) > $(prev_version_file)
1437         $(AM_V_at)$(MAKE) update-NEWS-hash
1438         $(AM_V_at)perl -pi                                              \
1439           -e '$$. == 3 and print "$(gl_noteworthy_news_)\n\n\n"'        \
1440           $(srcdir)/NEWS
1441         $(AM_V_at)msg=$$($(emit-commit-log)) || exit 1;         \
1442         cd $(srcdir) && $(VC) commit -m "$$msg" -a
1443
1444 # Override this with e.g., -s $(srcdir)/some_other_name.texi
1445 # if the default $(PACKAGE)-derived name doesn't apply.
1446 gendocs_options_ ?=
1447
1448 .PHONY: web-manual
1449 web-manual:
1450         $(AM_V_GEN)test -z "$(manual_title)" \
1451           && { echo define manual_title in cfg.mk 1>&2; exit 1; } || :
1452         $(AM_V_at)cd '$(srcdir)/doc'; \
1453           $(SHELL) ../$(_build-aux)/gendocs.sh $(gendocs_options_) \
1454              -o '$(abs_builddir)/doc/manual' \
1455              --email $(PACKAGE_BUGREPORT) $(PACKAGE) \
1456             "$(PACKAGE_NAME) - $(manual_title)"
1457         $(AM_V_at)echo " *** Upload the doc/manual directory to web-cvs."
1458
1459 .PHONY: web-manual-update
1460 web-manual-update:
1461         $(AM_V_GEN)cd $(srcdir) \
1462           && $(_build-aux)/gnu-web-doc-update -C $(abs_builddir)
1463
1464
1465 # Code Coverage
1466
1467 init-coverage:
1468         $(MAKE) $(AM_MAKEFLAGS) clean
1469         lcov --directory . --zerocounters
1470
1471 COVERAGE_CCOPTS ?= "-g --coverage"
1472 COVERAGE_OUT ?= doc/coverage
1473
1474 build-coverage:
1475         $(MAKE) $(AM_MAKEFLAGS) CFLAGS=$(COVERAGE_CCOPTS) CXXFLAGS=$(COVERAGE_CCOPTS)
1476         $(MAKE) $(AM_MAKEFLAGS) CFLAGS=$(COVERAGE_CCOPTS) CXXFLAGS=$(COVERAGE_CCOPTS) check
1477         mkdir -p $(COVERAGE_OUT)
1478         lcov --directory . --output-file $(COVERAGE_OUT)/$(PACKAGE).info \
1479                 --capture
1480
1481 gen-coverage:
1482         genhtml --output-directory $(COVERAGE_OUT) \
1483                 $(COVERAGE_OUT)/$(PACKAGE).info \
1484                 --highlight --frames --legend \
1485                 --title "$(PACKAGE_NAME)"
1486
1487 coverage: init-coverage build-coverage gen-coverage
1488
1489 # Some projects carry local adjustments for gnulib modules via patches in
1490 # a gnulib patch directory whose default name is gl/ (defined in bootstrap
1491 # via local_gl_dir=gl).  Those patches become stale as the originals evolve
1492 # in gnulib.  Use this rule to refresh any stale patches.  It applies each
1493 # patch to the original in $(gnulib_dir) and uses the temporary result to
1494 # generate a fuzz-free .diff file.  If you customize the name of your local
1495 # gnulib patch directory via bootstrap.conf, this rule detects that name.
1496 # Run this from a non-VPATH (i.e., srcdir) build directory.
1497 .PHONY: refresh-gnulib-patches
1498 refresh-gnulib-patches:
1499         gl=gl;                                                          \
1500         if test -f bootstrap.conf; then                                 \
1501           t=$$(perl -lne '/^\s*local_gl_dir=(\S+)/ and $$d=$$1;'        \
1502                -e 'END{defined $$d and print $$d}' bootstrap.conf);     \
1503           test -n "$$t" && gl=$$t;                                      \
1504         fi;                                                             \
1505         for diff in $$(cd $$gl; git ls-files | grep '\.diff$$'); do     \
1506           b=$$(printf %s "$$diff"|sed 's/\.diff$$//');                  \
1507           VERSION_CONTROL=none                                          \
1508             patch "$(gnulib_dir)/$$b" "$$gl/$$diff" || exit 1;          \
1509           ( cd $(gnulib_dir) || exit 1;                                 \
1510             git diff "$$b" > "../$$gl/$$diff";                          \
1511             git checkout $$b ) || exit 1;                               \
1512         done
1513
1514 # Update gettext files.
1515 PACKAGE ?= $(shell basename $(PWD))
1516 PO_DOMAIN ?= $(PACKAGE)
1517 POURL = http://translationproject.org/latest/$(PO_DOMAIN)/
1518 PODIR ?= po
1519 refresh-po:
1520         rm -f $(PODIR)/*.po && \
1521         echo "$(ME): getting translations into po (please ignore the robots.txt ERROR 404)..." && \
1522         wget --no-verbose --directory-prefix $(PODIR) --no-directories --recursive --level 1 --accept .po --accept .po.1 $(POURL) && \
1523         echo 'en@boldquot' > $(PODIR)/LINGUAS && \
1524         echo 'en@quot' >> $(PODIR)/LINGUAS && \
1525         ls $(PODIR)/*.po | sed 's/\.po//;s,$(PODIR)/,,' | sort >> $(PODIR)/LINGUAS
1526
1527  # Running indent once is not idempotent, but running it twice is.
1528 INDENT_SOURCES ?= $(C_SOURCES)
1529 .PHONY: indent
1530 indent:
1531         indent $(INDENT_SOURCES)
1532         indent $(INDENT_SOURCES)
1533
1534 # If you want to set UPDATE_COPYRIGHT_* environment variables,
1535 # put the assignments in this variable.
1536 update-copyright-env ?=
1537
1538 # Run this rule once per year (usually early in January)
1539 # to update all FSF copyright year lists in your project.
1540 # If you have an additional project-specific rule,
1541 # add it in cfg.mk along with a line 'update-copyright: prereq'.
1542 # By default, exclude all variants of COPYING; you can also
1543 # add exemptions (such as ChangeLog..* for rotated change logs)
1544 # in the file .x-update-copyright.
1545 .PHONY: update-copyright
1546 update-copyright:
1547         $(AM_V_GEN)grep -l -w Copyright                                  \
1548           $$(export VC_LIST_EXCEPT_DEFAULT=COPYING && $(VC_LIST_EXCEPT)) \
1549           | $(update-copyright-env) xargs $(srcdir)/$(_build-aux)/$@
1550
1551 # This tight_scope test is skipped with a warning if $(_gl_TS_headers) is not
1552 # overridden and $(_gl_TS_dir)/Makefile.am does not mention noinst_HEADERS.
1553
1554 # NOTE: to override any _gl_TS_* default value, you must
1555 # define the variable(s) using "export" in cfg.mk.
1556 _gl_TS_dir ?= src
1557
1558 ALL_RECURSIVE_TARGETS += sc_tight_scope
1559 sc_tight_scope: tight-scope.mk
1560         @fail=0;                                                        \
1561         if ! grep '^ *export _gl_TS_headers *=' $(srcdir)/cfg.mk        \
1562                 > /dev/null                                             \
1563            && ! grep -w noinst_HEADERS $(srcdir)/$(_gl_TS_dir)/Makefile.am \
1564                 > /dev/null 2>&1; then                                  \
1565             echo '$(ME): skipping $@';                                  \
1566         else                                                            \
1567             $(MAKE) -s -C $(_gl_TS_dir)                                 \
1568                 -f Makefile                                             \
1569                 -f $(abs_top_srcdir)/cfg.mk                             \
1570                 -f $(abs_top_builddir)/$<                               \
1571               _gl_tight_scope                                           \
1572                 || fail=1;                                              \
1573         fi;                                                             \
1574         rm -f $<;                                                       \
1575         exit $$fail
1576
1577 tight-scope.mk: $(ME)
1578         @rm -f $@ $@-t
1579         @perl -ne '/^# TS-start/.../^# TS-end/ and print' $(srcdir)/$(ME) > $@-t
1580         @chmod a=r $@-t && mv $@-t $@
1581
1582 ifeq (a,b)
1583 # TS-start
1584
1585 # Most functions should have static scope.
1586 # Any that don't must be marked with 'extern', but 'main'
1587 # and 'usage' are exceptions: they're always extern, but
1588 # do not need to be marked.  Symbols matching '__.*' are
1589 # reserved by the compiler, so are automatically excluded below.
1590 _gl_TS_unmarked_extern_functions ?= main usage
1591 _gl_TS_function_match ?= /^(?:$(_gl_TS_extern)) +.*?(\S+) *\(/
1592
1593 # If your project uses a macro like "XTERN", then put
1594 # the following in cfg.mk to override this default:
1595 # export _gl_TS_extern = extern|XTERN
1596 _gl_TS_extern ?= extern
1597
1598 # The second nm|grep checks for file-scope variables with 'extern' scope.
1599 # Without gnulib's progname module, you might put program_name here.
1600 # Symbols matching '__.*' are reserved by the compiler,
1601 # so are automatically excluded below.
1602 _gl_TS_unmarked_extern_vars ?=
1603
1604 # NOTE: the _match variables are perl expressions -- not mere regular
1605 # expressions -- so that you can extend them to match other patterns
1606 # and easily extract matched variable names.
1607 # For example, if your project declares some global variables via
1608 # a macro like this: GLOBAL(type, var_name, initializer), then you
1609 # can override this definition to automatically extract those names:
1610 # export _gl_TS_var_match = \
1611 #   /^(?:$(_gl_TS_extern)) .*?\**(\w+)(\[.*?\])?;/ || /\bGLOBAL\(.*?,\s*(.*?),/
1612 _gl_TS_var_match ?= /^(?:$(_gl_TS_extern)) .*?(\w+)(\[.*?\])?;/
1613
1614 # The names of object files in (or relative to) $(_gl_TS_dir).
1615 _gl_TS_obj_files ?= *.$(OBJEXT)
1616
1617 # Files in which to search for the one-line style extern declarations.
1618 # $(_gl_TS_dir)-relative.
1619 _gl_TS_headers ?= $(noinst_HEADERS)
1620 _gl_TS_other_headers ?= *.h
1621
1622 .PHONY: _gl_tight_scope
1623 _gl_tight_scope: $(bin_PROGRAMS)
1624         t=exceptions-$$$$;                                              \
1625         trap 's=$$?; rm -f $$t; exit $$s' 0;                            \
1626         for sig in 1 2 3 13 15; do                                      \
1627           eval "trap 'v=`expr $$sig + 128`; (exit $$v); exit $$v' $$sig"; \
1628         done;                                                           \
1629         src=`for f in $(SOURCES); do                                    \
1630                test -f $$f && d= || d=$(srcdir)/; echo $$d$$f; done`;   \
1631         hdr=`for f in $(_gl_TS_headers); do                             \
1632                test -f $$f && d= || d=$(srcdir)/; echo $$d$$f; done`;   \
1633         ( printf '^%s$$\n' '__.*' $(_gl_TS_unmarked_extern_functions);  \
1634           grep -h -A1 '^extern .*[^;]$$' $$src                          \
1635             | grep -vE '^(extern |--)' | sed 's/ .*//';                 \
1636           perl -lne                                                     \
1637              '$(_gl_TS_function_match) and print "^$$1\$$"' $$hdr;      \
1638         ) | sort -u > $$t;                                              \
1639         nm -e $(_gl_TS_obj_files) | sed -n 's/.* T //p'|grep -Ev -f $$t \
1640           && { echo the above functions should have static scope >&2;   \
1641                exit 1; } || : ;                                         \
1642         ( printf '^%s$$\n' '__.*' $(_gl_TS_unmarked_extern_vars);       \
1643           perl -lne '$(_gl_TS_var_match) and print "^$$1\$$"'           \
1644                 $$hdr $(_gl_TS_other_headers)                           \
1645         ) | sort -u > $$t;                                              \
1646         nm -e $(_gl_TS_obj_files) | sed -n 's/.* [BCDGRS] //p'          \
1647             | sort -u | grep -Ev -f $$t                                 \
1648           && { echo the above variables should have static scope >&2;   \
1649                exit 1; } || :
1650 # TS-end
1651 endif