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) 2001-2022 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 <https://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 # These variables ought to be defined through the configure.ac section
  25 # of the module description. But some packages import this file directly,
  26 # ignoring the module description.
  27 AWK ?= awk
  28 GREP ?= grep
  29 SED ?= sed
  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 if your gnulib submodule lives
  66 # in a different location.
  67 gnulib_dir ?= $(shell if test -f $(srcdir)/gnulib/gnulib-tool; then \
  68                         echo $(srcdir)/gnulib; \
  69                 else \
  70                         echo ${GNULIB_SRCDIR}; \
  71                 fi)
  72
  73 # You can override this variable in cfg.mk to set your own regexp
  74 # matching files to ignore.
  75 VC_LIST_ALWAYS_EXCLUDE_REGEX ?= ^$$
  76
  77 # This is to preprocess robustly the output of $(VC_LIST), so that even
  78 # when $(srcdir) is a pathological name like "....", the leading sed command
  79 # removes only the intended prefix.
  80 _dot_escaped_srcdir = $(subst .,\.,$(srcdir))
  81
  82 # Post-process $(VC_LIST) output, prepending $(srcdir)/, but only
  83 # when $(srcdir) is not ".".
  84 ifeq ($(srcdir),.)
  85   _prepend_srcdir_prefix =
  86 else
  87   _prepend_srcdir_prefix = | $(SED) 's|^|$(srcdir)/|'
  88 endif
  89
  90 # In order to be able to consistently filter "."-relative names,
  91 # (i.e., with no $(srcdir) prefix), this definition is careful to
  92 # remove any $(srcdir) prefix, and to restore what it removes.
  93 _sc_excl = \
  94   $(or $(exclude_file_name_regexp--$@),^$$)
  95 VC_LIST_EXCEPT = \
  96   $(VC_LIST) | $(SED) 's|^$(_dot_escaped_srcdir)/||' \
  97         | if test -f $(srcdir)/.x-$@; then $(GREP) -vEf $(srcdir)/.x-$@; \
  98           else $(GREP) -Ev -e "$${VC_LIST_EXCEPT_DEFAULT-ChangeLog}"; fi \
  99         | $(GREP) -Ev -e '($(VC_LIST_ALWAYS_EXCLUDE_REGEX)|$(_sc_excl))' \
 100         $(_prepend_srcdir_prefix)
 101
 102 ifeq ($(origin prev_version_file), undefined)
 103   prev_version_file = $(srcdir)/.prev-version
 104 endif
 105
 106 PREV_VERSION := $(shell cat $(prev_version_file) 2>/dev/null)
 107 VERSION_REGEXP = $(subst .,\.,$(VERSION))
 108 PREV_VERSION_REGEXP = $(subst .,\.,$(PREV_VERSION))
 109
 110 ifeq ($(VC),$(GIT))
 111   this-vc-tag = v$(VERSION)
 112   this-vc-tag-regexp = v$(VERSION_REGEXP)
 113 else
 114   tag-package = $(shell echo "$(PACKAGE)" | tr '[:lower:]' '[:upper:]')
 115   tag-this-version = $(subst .,_,$(VERSION))
 116   this-vc-tag = $(tag-package)-$(tag-this-version)
 117   this-vc-tag-regexp = $(this-vc-tag)
 118 endif
 119 my_distdir = $(PACKAGE)-$(VERSION)
 120
 121 # Old releases are stored here.
 122 release_archive_dir ?= ../release
 123
 124 # If RELEASE_TYPE is undefined, but RELEASE is, use its second word.
 125 # But overwrite VERSION.
 126 ifdef RELEASE
 127   VERSION := $(word 1, $(RELEASE))
 128   RELEASE_TYPE ?= $(word 2, $(RELEASE))
 129 endif
 130
 131 # Validate and return $(RELEASE_TYPE), or die.
 132 RELEASE_TYPES = alpha beta stable
 133 release-type = $(call member-check,RELEASE_TYPE,$(RELEASE_TYPES))
 134
 135 # Override gnu_rel_host and url_dir_list in cfg.mk if these are not right.
 136 # Use alpha.gnu.org for alpha and beta releases.
 137 # Use ftp.gnu.org for stable releases.
 138 gnu_ftp_host-alpha = alpha.gnu.org
 139 gnu_ftp_host-beta = alpha.gnu.org
 140 gnu_ftp_host-stable = ftp.gnu.org
 141 gnu_rel_host ?= $(gnu_ftp_host-$(release-type))
 142
 143 url_dir_list ?= $(if $(call _equal,$(gnu_rel_host),ftp.gnu.org),        \
 144                      https://ftpmirror.gnu.org/$(PACKAGE),              \
 145                      https://$(gnu_rel_host)/gnu/$(PACKAGE))
 146
 147 # Override this in cfg.mk if you are using a different format in your
 148 # NEWS file.
 149 today = $(shell date +%Y-%m-%d)
 150
 151 # Select which lines of NEWS are searched for $(news-check-regexp).
 152 # This is a sed line number spec.  The default says that we search
 153 # lines 1..10 of NEWS for $(news-check-regexp).
 154 # If you want to search only line 3 or only lines 20-22, use "3" or "20,22".
 155 news-check-lines-spec ?= 1,10
 156 news-check-regexp ?= '^\*.* $(VERSION_REGEXP) \($(today)\)'
 157
 158 # Prevent programs like 'sort' from considering distinct strings to be equal.
 159 # Doing it here saves us from having to set LC_ALL elsewhere in this file.
 160 export LC_ALL = C
 161
 162 ## --------------- ##
 163 ## Sanity checks.  ##
 164 ## --------------- ##
 165
 166 ifneq ($(_gl-Makefile),)
 167 _cfg_mk := $(wildcard $(srcdir)/cfg.mk)
 168
 169 # Collect the names of rules starting with 'sc_'.
 170 syntax-check-rules := $(sort $(shell env LC_ALL=C $(SED) -n \
 171    's/^\(sc_[a-zA-Z0-9_-]*\):.*/\1/p' $(srcdir)/$(ME) $(_cfg_mk)))
 172 .PHONY: $(syntax-check-rules)
 173
 174 ifeq ($(shell $(VC_LIST) >/dev/null 2>&1; echo $$?),0)
 175   local-checks-available += $(syntax-check-rules)
 176 else
 177   local-checks-available += no-vc-detected
 178 no-vc-detected:
 179         @echo "No version control files detected; skipping syntax check"
 180 endif
 181 .PHONY: $(local-checks-available)
 182
 183 # Arrange to print the name of each syntax-checking rule just before running it.
 184 $(syntax-check-rules): %: %.m
 185 sc_m_rules_ = $(patsubst %, %.m, $(syntax-check-rules))
 186 .PHONY: $(sc_m_rules_)
 187 $(sc_m_rules_):
 188         @echo $(patsubst sc_%.m, %, $@)
 189         @date +%s.%N > .sc-start-$(basename $@)
 190
 191 # Compute and print the elapsed time for each syntax-check rule.
 192 sc_z_rules_ = $(patsubst %, %.z, $(syntax-check-rules))
 193 .PHONY: $(sc_z_rules_)
 194 $(sc_z_rules_): %.z: %
 195         @end=$$(date +%s.%N);                                           \
 196         start=$$(cat .sc-start-$*);                                     \
 197         rm -f .sc-start-$*;                                             \
 198         $(AWK) -v s=$$start -v e=$$end                                  \
 199           'END {printf "%.2f $(patsubst sc_%,%,$*)\n", e - s}' < /dev/null
 200
 201 # The patsubst here is to replace each sc_% rule with its sc_%.z wrapper
 202 # that computes and prints elapsed time.
 203 local-check :=                                                          \
 204   $(patsubst sc_%, sc_%.z,                                              \
 205     $(filter-out $(local-checks-to-skip), $(local-checks-available)))
 206
 207 syntax-check: $(local-check)
 208 endif
 209
 210 # _sc_search_regexp
 211 #
 212 # This macro searches for a given construct in the selected files and
 213 # then takes some action.
 214 #
 215 # Parameters (shell variables):
 216 #
 217 #  prohibit | require
 218 #
 219 #     Regular expression (ERE) denoting either a forbidden construct
 220 #     or a required construct.  Those arguments are exclusive.
 221 #
 222 #  exclude
 223 #
 224 #     Regular expression (ERE) denoting lines to ignore that matched
 225 #     a prohibit construct.  For example, this can be used to exclude
 226 #     comments that mention why the nearby code uses an alternative
 227 #     construct instead of the simpler prohibited construct.
 228 #
 229 #  in_vc_files | in_files
 230 #
 231 #     grep-E-style regexp selecting the files to check.  For in_vc_files,
 232 #     the regexp is used to select matching files from the list of all
 233 #     version-controlled files; for in_files, it's from the names printed
 234 #     by "find $(srcdir)".  When neither is specified, use all files that
 235 #     are under version control.
 236 #
 237 #  containing | non_containing
 238 #
 239 #     Select the files (non) containing strings matching this regexp.
 240 #     If both arguments are specified then CONTAINING takes
 241 #     precedence.
 242 #
 243 #  with_grep_options
 244 #
 245 #     Extra options for grep.
 246 #
 247 #  ignore_case
 248 #
 249 #     Ignore case.
 250 #
 251 #  halt
 252 #
 253 #     Message to display before to halting execution.
 254 #
 255 # Finally, you may exempt files based on an ERE matching file names.
 256 # For example, to exempt from the sc_space_tab check all files with the
 257 # .diff suffix, set this Make variable:
 258 #
 259 # exclude_file_name_regexp--sc_space_tab = \.diff$
 260 #
 261 # Note that while this functionality is mostly inherited via VC_LIST_EXCEPT,
 262 # when filtering by name via in_files, we explicitly filter out matching
 263 # names here as well.
 264
 265 # Initialize each, so that envvar settings cannot interfere.
 266 export require =
 267 export prohibit =
 268 export exclude =
 269 export in_vc_files =
 270 export in_files =
 271 export containing =
 272 export non_containing =
 273 export halt =
 274 export with_grep_options =
 275
 276 # By default, _sc_search_regexp does not ignore case.
 277 export ignore_case =
 278 _ignore_case = $$(test -n "$$ignore_case" && printf %s -i || :)
 279
 280 define _sc_say_and_exit
 281    dummy=; : so we do not need a semicolon before each use;             \
 282    { printf '%s\n' "$(ME): $$msg" 1>&2; exit 1; };
 283 endef
 284
 285 define _sc_search_regexp
 286    dummy=; : so we do not need a semicolon before each use;             \
 287                                                                         \
 288    : Check arguments;                                                   \
 289    test -n "$$prohibit" && test -n "$$require"                          \
 290      && { msg='Cannot specify both prohibit and require'                \
 291           $(_sc_say_and_exit) } || :;                                   \
 292    test -z "$$prohibit" && test -z "$$require"                          \
 293      && { msg='Should specify either prohibit or require'               \
 294           $(_sc_say_and_exit) } || :;                                   \
 295    test -z "$$prohibit" && test -n "$$exclude"                          \
 296      && { msg='Use of exclude requires a prohibit pattern'              \
 297           $(_sc_say_and_exit) } || :;                                   \
 298    test -n "$$in_vc_files" && test -n "$$in_files"                      \
 299      && { msg='Cannot specify both in_vc_files and in_files'            \
 300           $(_sc_say_and_exit) } || :;                                   \
 301    test "x$$halt" != x                                                  \
 302      || { msg='halt not defined' $(_sc_say_and_exit) };                 \
 303                                                                         \
 304    : Filter by file name;                                               \
 305    if test -n "$$in_files"; then                                        \
 306      files=$$(find $(srcdir) | $(GREP) -E "$$in_files"                  \
 307               | $(GREP) -Ev '$(_sc_excl)');                             \
 308    else                                                                 \
 309      files=$$($(VC_LIST_EXCEPT));                                       \
 310      if test -n "$$in_vc_files"; then                                   \
 311        files=$$(echo "$$files" | $(GREP) -E "$$in_vc_files");           \
 312      fi;                                                                \
 313    fi;                                                                  \
 314                                                                         \
 315    : Filter by content;                                                 \
 316    test -n "$$files"                                                    \
 317      && test -n "$$containing"                                          \
 318      && { files=$$(echo "$$files" | xargs $(GREP) -l "$$containing"); } \
 319      || :;                                                              \
 320    test -n "$$files"                                                    \
 321      && test -n "$$non_containing"                                      \
 322      && { files=$$(echo "$$files" | xargs $(GREP) -vl "$$non_containing"); } \
 323      || :;                                                              \
 324                                                                         \
 325    : Check for the construct;                                           \
 326    if test -n "$$files"; then                                           \
 327      if test -n "$$prohibit"; then                                      \
 328        echo "$$files"                                                   \
 329          | xargs $(GREP) $$with_grep_options $(_ignore_case) -nE        \
 330                 "$$prohibit" /dev/null                                  \
 331          | $(GREP) -vE "$${exclude:-^$$}"                               \
 332          && { msg="$$halt" $(_sc_say_and_exit) }                        \
 333          || :;                                                          \
 334      else                                                               \
 335        echo "$$files"                                                   \
 336          | xargs                                                        \
 337              $(GREP) $$with_grep_options $(_ignore_case) -LE "$$require" \
 338          | $(GREP) .                                                    \
 339          && { msg="$$halt" $(_sc_say_and_exit) }                        \
 340          || :;                                                          \
 341      fi                                                                 \
 342    else :;                                                              \
 343    fi || :;
 344 endef
 345
 346 sc_avoid_if_before_free:
 347         @$(VC_LIST_EXCEPT)                                              \
 348           | $(GREP) -v useless-if-before-free                           \
 349           | xargs                                                       \
 350               $(srcdir)/$(_build-aux)/useless-if-before-free            \
 351               $(useless_free_options)                                   \
 352           && { printf '$(ME): found useless "if"'                       \
 353                       ' before "free" above\n' 1>&2;                    \
 354                exit 1; }                                                \
 355           || :
 356
 357 sc_cast_of_argument_to_free:
 358         @prohibit='\<free *\( *\(' halt="don't cast free argument"      \
 359           $(_sc_search_regexp)
 360
 361 sc_cast_of_x_alloc_return_value:
 362         @prohibit='\*\) *x(m|c|re)alloc\>'                              \
 363         halt="don't cast x*alloc return value"                          \
 364           $(_sc_search_regexp)
 365
 366 sc_cast_of_alloca_return_value:
 367         @prohibit='\*\) *alloca\>'                                      \
 368         halt="don't cast alloca return value"                           \
 369           $(_sc_search_regexp)
 370
 371 sc_space_tab:
 372         @prohibit='[ ]  '                                               \
 373         halt='found SPACE-TAB sequence; remove the SPACE'               \
 374           $(_sc_search_regexp)
 375
 376 # Don't use *scanf or the old ato* functions in "real" code.
 377 # They provide no error checking mechanism.
 378 # Instead, use strto* functions.
 379 sc_prohibit_atoi_atof:
 380         @prohibit='\<([fs]?scanf|ato([filq]|ll)) *\('                           \
 381         halt='do not use *scan''f, ato''f, ato''i, ato''l, ato''ll or ato''q'   \
 382           $(_sc_search_regexp)
 383
 384 # Use STREQ rather than comparing strcmp == 0, or != 0.
 385 sp_ = strcmp *\(.+\)
 386 sc_prohibit_strcmp:
 387         @prohibit='! *strcmp *\(|\<$(sp_) *[!=]=|[!=]= *$(sp_)'         \
 388         exclude='# *define STRN?EQ\('                                   \
 389         halt='replace strcmp calls above with STREQ/STRNEQ'             \
 390           $(_sc_search_regexp)
 391
 392 # Really.  You don't want to use this function.
 393 # It may fail to NUL-terminate the destination,
 394 # and always NUL-pads out to the specified length.
 395 sc_prohibit_strncpy:
 396         @prohibit='\<strncpy *\('                                       \
 397         halt='do not use strncpy, period'                               \
 398           $(_sc_search_regexp)
 399
 400 # Pass EXIT_*, not number, to usage, exit, and error (when exiting)
 401 # Convert all uses automatically, via these two commands:
 402 # git grep -l '\<exit *(1)' \
 403 #  | grep -vEf .x-sc_prohibit_magic_number_exit \
 404 #  | xargs --no-run-if-empty \
 405 #      perl -pi -e 's/(^|[^.])\b(exit ?)\(1\)/$1$2(EXIT_FAILURE)/'
 406 # git grep -l '\<exit *(0)' \
 407 #  | grep -vEf .x-sc_prohibit_magic_number_exit \
 408 #  | xargs --no-run-if-empty \
 409 #      perl -pi -e 's/(^|[^.])\b(exit ?)\(0\)/$1$2(EXIT_SUCCESS)/'
 410 sc_prohibit_magic_number_exit:
 411         @prohibit='(^|[^.])\<(usage|exit|error) ?\(-?[0-9]+[,)]'        \
 412         exclude='exit \(77\)|error ?\(((0|77),|[^,]*)'                  \
 413         halt='use EXIT_* values rather than magic number'               \
 414           $(_sc_search_regexp)
 415
 416 # Check that we don't use $< in non-implicit Makefile rules.
 417 #
 418 # To find the Makefiles, trace AC_CONFIG_FILES.  Using VC_LIST would
 419 # miss the Makefiles that are not under VC control (e.g., symlinks
 420 # installed for gettext).  "Parsing" (recursive) uses of SUBDIRS seems
 421 # too delicate.
 422 #
 423 # Use GNU Make's --print-data-base to normalize the rules into some
 424 # easy to parse format: they are separated by two \n.  Look for the
 425 # "section" about non-pattern rules (marked with "# Files") inside
 426 # which there are still the POSIX Make like implicit rules (".c.o").
 427 sc_prohibit_gnu_make_extensions_awk_ =                                  \
 428   BEGIN {                                                               \
 429       RS = "\n\n";                                                      \
 430       in_rules = 0;                                                     \
 431   }                                                                     \
 432   /^\# Files/ {                                                         \
 433       in_rules = 1;                                                     \
 434   }                                                                     \
 435   /\$$</ && in_rules && $$0 !~ /^(.*\n)*\.\w+(\.\w+)?:/ {               \
 436       print "Error: " file ": $$< in a non implicit rule\n" $$0;        \
 437       status = 1;                                                       \
 438   }                                                                     \
 439   END {                                                                 \
 440      exit status;                                                       \
 441   }
 442 sc_prohibit_gnu_make_extensions:
 443         @if $(AWK) --version | grep GNU >/dev/null 2>&1; then           \
 444           (cd $(srcdir) && autoconf --trace AC_CONFIG_FILES:'$$1') |    \
 445             tr ' ' '\n' |                                               \
 446             $(SED) -ne '/Makefile/{s/\.in$$//;p;}' |                    \
 447             while read m; do                                            \
 448               $(MAKE) -qp -f $$m .DUMMY-TARGET 2>/dev/null |            \
 449                 $(AWK) -v file=$$m -e '$($@_awk_)' || exit 1;           \
 450             done;                                                       \
 451         fi
 452
 453 # Using EXIT_SUCCESS as the first argument to error is misleading,
 454 # since when that parameter is 0, error does not exit.  Use '0' instead.
 455 sc_error_exit_success:
 456         @prohibit='error *\(EXIT_SUCCESS,'                              \
 457         in_vc_files='\.[chly]$$'                                        \
 458         halt='found error (EXIT_SUCCESS'                                \
 459          $(_sc_search_regexp)
 460
 461 # "FATAL:" should be fully upper-cased in error messages
 462 # "WARNING:" should be fully upper-cased, or fully lower-cased
 463 sc_error_message_warn_fatal:
 464         @$(VC_LIST_EXCEPT)                                              \
 465           | xargs $(GREP) -nEA2 '[^rp]error *\(' /dev/null              \
 466           | $(GREP) -E '"Warning|"Fatal|"fatal'                         \
 467           && { echo '$(ME): use FATAL, WARNING or warning' 1>&2;        \
 468                exit 1; }                                                \
 469           || :
 470
 471 # Error messages should not start with a capital letter
 472 sc_error_message_uppercase:
 473         @$(VC_LIST_EXCEPT)                                              \
 474           | xargs $(GREP) -nEA2 '[^rp]error *\(' /dev/null              \
 475           | $(GREP) -E '"[A-Z]'                                         \
 476           | $(GREP) -vE '"FATAL|"WARNING|"Java|"C#|"PRI'                \
 477           && { echo '$(ME): found capitalized error message' 1>&2;      \
 478                exit 1; }                                                \
 479           || :
 480
 481 # Error messages should not end with a period
 482 sc_error_message_period:
 483         @$(VC_LIST_EXCEPT)                                              \
 484           | xargs $(GREP) -nEA2 '[^rp]error *\(' /dev/null              \
 485           | $(GREP) -E '[^."]\."'                                       \
 486           && { echo '$(ME): found error message ending in period' 1>&2; \
 487                exit 1; }                                                \
 488           || :
 489
 490 sc_file_system:
 491         @prohibit=file''system                                          \
 492         exclude='/proc/filesystems'                                     \
 493         ignore_case=1                                                   \
 494         halt='found use of "file''system"; spell it "file system"'      \
 495           $(_sc_search_regexp)
 496
 497 # Don't use cpp tests of this symbol.  All code assumes config.h is included.
 498 sc_prohibit_have_config_h:
 499         @prohibit='^# *if.*HAVE''_CONFIG_H'                             \
 500         halt='found use of HAVE''_CONFIG_H; remove'                     \
 501           $(_sc_search_regexp)
 502
 503 # Nearly all .c files must include <config.h>.  However, we also permit this
 504 # via inclusion of a package-specific header, if cfg.mk specified one.
 505 # config_h_header must be suitable for grep -E.
 506 config_h_header ?= <config\.h>
 507 sc_require_config_h:
 508         @require='^# *include $(config_h_header)'                       \
 509         in_vc_files='\.c$$'                                             \
 510         halt='the above files do not include <config.h>'                \
 511           $(_sc_search_regexp)
 512
 513 # Print each file name for which the first #include does not match
 514 # $(config_h_header).  Like grep -m 1, this only looks at the first match.
 515 perl_config_h_first_ =                                                  \
 516   -e 'BEGIN {$$ret = 0}'                                                \
 517   -e 'if (/^\# *include\b/) {'                                          \
 518   -e '  if (not m{^\# *include $(config_h_header)}) {'                  \
 519   -e '    print "$$ARGV\n";'                                            \
 520   -e '    $$ret = 1;'                                                   \
 521   -e '  }'                                                              \
 522   -e '  \# Move on to next file after first include'                    \
 523   -e '  close ARGV;'                                                    \
 524   -e '}'                                                                \
 525   -e 'END {exit $$ret}'
 526
 527 # You must include <config.h> before including any other header file.
 528 # This can possibly be via a package-specific header, if given by cfg.mk.
 529 sc_require_config_h_first:
 530         @if $(VC_LIST_EXCEPT) | $(GREP) '\.c$$' > /dev/null; then       \
 531           files=$$($(VC_LIST_EXCEPT) | $(GREP) '\.c$$') &&              \
 532           perl -n $(perl_config_h_first_) $$files ||                    \
 533             { echo '$(ME): the above files include some other header'   \
 534                 'before <config.h>' 1>&2; exit 1; } || :;               \
 535         else :;                                                         \
 536         fi
 537
 538 sc_prohibit_HAVE_MBRTOWC:
 539         @prohibit='\bHAVE_MBRTOWC\b'                                    \
 540         halt="do not use $$prohibit; it is always defined"              \
 541           $(_sc_search_regexp)
 542
 543 # To use this "command" macro, you must first define two shell variables:
 544 # h: the header name, with no enclosing <> or ""
 545 # re: a regular expression that matches IFF something provided by $h is used.
 546 define _sc_header_without_use
 547   dummy=; : so we do not need a semicolon before each use;              \
 548   h_esc=`echo '[<"]'"$$h"'[">]'|$(SED) 's/\./\\\\./g'`;                 \
 549   if $(VC_LIST_EXCEPT) | $(GREP) '\.c$$' > /dev/null; then              \
 550     files=$$($(GREP) -l '^# *include '"$$h_esc"                         \
 551              $$($(VC_LIST_EXCEPT) | $(GREP) '\.c$$')) &&                \
 552     $(GREP) -LE "$$re" $$files | $(GREP) . &&                           \
 553       { echo "$(ME): the above files include $$h but don't use it"      \
 554         1>&2; exit 1; } || :;                                           \
 555   else :;                                                               \
 556   fi
 557 endef
 558
 559 # Prohibit the inclusion of assert.h without an actual use of assert.
 560 sc_prohibit_assert_without_use:
 561         @h='assert.h' re='\<assert *\(' $(_sc_header_without_use)
 562
 563 # Prohibit the inclusion of close-stream.h without an actual use.
 564 sc_prohibit_close_stream_without_use:
 565         @h='close-stream.h' re='\<close_stream *\(' $(_sc_header_without_use)
 566
 567 # Prohibit the inclusion of getopt.h without an actual use.
 568 sc_prohibit_getopt_without_use:
 569         @h='getopt.h' re='\<getopt(_long)? *\(' $(_sc_header_without_use)
 570
 571 # Don't include quotearg.h unless you use one of its functions.
 572 sc_prohibit_quotearg_without_use:
 573         @h='quotearg.h' re='\<quotearg(_[^ ]+)? *\(' $(_sc_header_without_use)
 574
 575 # Don't include quote.h unless you use one of its functions.
 576 sc_prohibit_quote_without_use:
 577         @h='quote.h' re='\<quote((_n)? *\(|_quoting_options\>)' \
 578           $(_sc_header_without_use)
 579
 580 # Don't include this header unless you use one of its functions.
 581 sc_prohibit_long_options_without_use:
 582         @h='long-options.h' re='\<parse_(long_options|gnu_standard_options_only) *\(' \
 583           $(_sc_header_without_use)
 584
 585 # Don't include this header unless you use one of its functions.
 586 sc_prohibit_inttostr_without_use:
 587         @h='inttostr.h' re='\<(off|[iu]max|uint)tostr *\(' \
 588           $(_sc_header_without_use)
 589
 590 # Don't include this header unless you use one of its functions.
 591 sc_prohibit_ignore_value_without_use:
 592         @h='ignore-value.h' re='\<ignore_(value|ptr) *\(' \
 593           $(_sc_header_without_use)
 594
 595 # Don't include this header unless you use one of its functions.
 596 sc_prohibit_error_without_use:
 597         @h='error.h' \
 598         re='\<error(_at_line|_print_progname|_one_per_line|_message_count)? *\('\
 599           $(_sc_header_without_use)
 600
 601 # Don't include xalloc.h unless you use one of its functions.
 602 # Consider these symbols:
 603 # perl -lne '/^# *define (\w+)\(/ and print $1' lib/xalloc.h|grep -v '^__';
 604 # perl -lne '/^(?:extern )?(?:void|char) \*?(\w+) *\(/ and print $1' lib/xalloc.h
 605 # Divide into two sets on case, and filter each through this:
 606 # | sort | perl -MRegexp::Assemble -le \
 607 #  'print Regexp::Assemble->new(file => "/dev/stdin")->as_string'|sed 's/\?://g'
 608 # Note this was produced by the above:
 609 # _xa1 = \
 610 #x(((2n?)?re|c(har)?|n(re|m)|z)alloc|alloc_(oversized|die)|m(alloc|emdup)|strdup)
 611 # But we can do better, in at least two ways:
 612 # 1) take advantage of two "dup"-suffixed strings:
 613 # x(((2n?)?re|c(har)?|n(re|m)|[mz])alloc|alloc_(oversized|die)|(mem|str)dup)
 614 # 2) notice that "c(har)?|[mz]" is equivalent to the shorter and more readable
 615 # "char|[cmz]"
 616 # x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
 617 _xa1 = x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
 618 _xa2 = X([CZ]|N?M)ALLOC
 619 sc_prohibit_xalloc_without_use:
 620         @h='xalloc.h' \
 621         re='\<($(_xa1)|$(_xa2)) *\('\
 622           $(_sc_header_without_use)
 623
 624 # Extract function names:
 625 # perl -lne '/^(?:extern )?(?:void|char|Hash_table) \*?(\w+) *\(/ and print $1' lib/hash.h
 626 _hash_re = \
 627 hash_(re(set_tuning|move)|xin(itialize|sert)|in(itialize|sert)|get_(firs|nex)t|print_statistics|(delet|fre)e|lookup|clear)
 628 _hash_fn = \<($(_hash_re)) *\(
 629 _hash_struct = (struct )?\<[Hh]ash_(table|tuning)\>
 630 sc_prohibit_hash_without_use:
 631         @h='hash.h' \
 632         re='$(_hash_fn)|$(_hash_struct)'\
 633           $(_sc_header_without_use)
 634
 635 sc_prohibit_cloexec_without_use:
 636         @h='cloexec.h' re='\<(set_cloexec_flag|dup_cloexec) *\(' \
 637           $(_sc_header_without_use)
 638
 639 sc_prohibit_posixver_without_use:
 640         @h='posixver.h' re='\<posix2_version *\(' $(_sc_header_without_use)
 641
 642 sc_prohibit_same_without_use:
 643         @h='same.h' re='\<same_name(at)? *\(' $(_sc_header_without_use)
 644
 645 sc_prohibit_hash_pjw_without_use:
 646         @h='hash-pjw.h' \
 647         re='\<hash_pjw\>' \
 648           $(_sc_header_without_use)
 649
 650 sc_prohibit_safe_read_without_use:
 651         @h='safe-read.h' re='(\<SAFE_READ_ERROR\>|\<safe_read *\()' \
 652           $(_sc_header_without_use)
 653
 654 sc_prohibit_argmatch_without_use:
 655         @h='argmatch.h' \
 656         re='(\<(ARGMATCH_DEFINE_GROUP|ARRAY_CARDINALITY|X?ARGMATCH(|_TO_ARGUMENT|_VERIFY))\>|\<(invalid_arg|argmatch(_exit_fn|_(in)?valid)?) *\()' \
 657           $(_sc_header_without_use)
 658
 659 sc_prohibit_canonicalize_without_use:
 660         @h='canonicalize.h' \
 661         re='CAN_(EXISTING|ALL_BUT_LAST|MISSING)|canonicalize_(mode_t|filename_mode|file_name)' \
 662           $(_sc_header_without_use)
 663
 664 sc_prohibit_root_dev_ino_without_use:
 665         @h='root-dev-ino.h' \
 666         re='(\<ROOT_DEV_INO_(CHECK|WARN)\>|\<get_root_dev_ino *\()' \
 667           $(_sc_header_without_use)
 668
 669 sc_prohibit_openat_without_use:
 670         @h='openat.h' \
 671         re='\<(openat_(permissive|needs_fchdir|(save|restore)_fail)|l?(stat|ch(own|mod))at|(euid)?accessat|(FCHMOD|FCHOWN|STAT)AT_INLINE)\>' \
 672           $(_sc_header_without_use)
 673
 674 # Prohibit the inclusion of c-ctype.h without an actual use.
 675 ctype_re = isalnum|isalpha|isascii|isblank|iscntrl|isdigit|isgraph|islower\
 676 |isprint|ispunct|isspace|isupper|isxdigit|tolower|toupper
 677 sc_prohibit_c_ctype_without_use:
 678         @h='c-ctype.h' re='\<c_($(ctype_re)) *\(' \
 679           $(_sc_header_without_use)
 680
 681 # The following list was generated by running:
 682 # man signal.h|col -b|perl -ne '/bsd_signal.*;/.../sigwaitinfo.*;/ and print' \
 683 #   | perl -lne '/^\s+(?:int|void).*?(\w+).*/ and print $1' | fmt
 684 _sig_functions = \
 685   bsd_signal kill killpg pthread_kill pthread_sigmask raise sigaction \
 686   sigaddset sigaltstack sigdelset sigemptyset sigfillset sighold sigignore \
 687   siginterrupt sigismember signal sigpause sigpending sigprocmask sigqueue \
 688   sigrelse sigset sigsuspend sigtimedwait sigwait sigwaitinfo
 689 _sig_function_re = $(subst $(_sp),|,$(strip $(_sig_functions)))
 690 # The following were extracted from "man signal.h" manually.
 691 _sig_types_and_consts =                                                 \
 692   MINSIGSTKSZ SA_NOCLDSTOP SA_NOCLDWAIT SA_NODEFER SA_ONSTACK           \
 693   SA_RESETHAND SA_RESTART SA_SIGINFO SIGEV_NONE SIGEV_SIGNAL            \
 694   SIGEV_THREAD SIGSTKSZ SIG_BLOCK SIG_SETMASK SIG_UNBLOCK SS_DISABLE    \
 695   SS_ONSTACK mcontext_t pid_t sig_atomic_t sigevent siginfo_t sigset_t  \
 696   sigstack sigval stack_t ucontext_t
 697 # generated via this:
 698 # perl -lne '/^#ifdef (SIG\w+)/ and print $1' lib/sig2str.c|sort -u|fmt -70
 699 _sig_names =                                                            \
 700   SIGABRT SIGALRM SIGALRM1 SIGBUS SIGCANCEL SIGCHLD SIGCLD SIGCONT      \
 701   SIGDANGER SIGDIL SIGEMT SIGFPE SIGFREEZE SIGGRANT SIGHUP SIGILL       \
 702   SIGINFO SIGINT SIGIO SIGIOT SIGKAP SIGKILL SIGKILLTHR SIGLOST SIGLWP  \
 703   SIGMIGRATE SIGMSG SIGPHONE SIGPIPE SIGPOLL SIGPRE SIGPROF SIGPWR      \
 704   SIGQUIT SIGRETRACT SIGSAK SIGSEGV SIGSOUND SIGSTKFLT SIGSTOP SIGSYS   \
 705   SIGTERM SIGTHAW SIGTRAP SIGTSTP SIGTTIN SIGTTOU SIGURG SIGUSR1        \
 706   SIGUSR2 SIGVIRT SIGVTALRM SIGWAITING SIGWINCH SIGWIND SIGWINDOW       \
 707   SIGXCPU SIGXFSZ
 708 _sig_syms_re = $(subst $(_sp),|,$(strip $(_sig_names) $(_sig_types_and_consts)))
 709
 710 # Prohibit the inclusion of signal.h without an actual use.
 711 sc_prohibit_signal_without_use:
 712         @h='signal.h'                                                   \
 713         re='\<($(_sig_function_re)) *\(|\<($(_sig_syms_re))\>'          \
 714           $(_sc_header_without_use)
 715
 716 # Don't include stdio--.h unless you use one of its functions.
 717 sc_prohibit_stdio--_without_use:
 718         @h='stdio--.h' re='\<((f(re)?|p)open|tmpfile) *\('              \
 719           $(_sc_header_without_use)
 720
 721 # Don't include stdio-safer.h unless you use one of its functions.
 722 sc_prohibit_stdio-safer_without_use:
 723         @h='stdio-safer.h' re='\<((f(re)?|p)open|tmpfile)_safer *\('    \
 724           $(_sc_header_without_use)
 725
 726 # Prohibit the inclusion of strings.h without a sensible use.
 727 # Using the likes of bcmp, bcopy, bzero, index or rindex is not sensible.
 728 sc_prohibit_strings_without_use:
 729         @h='strings.h'                                                  \
 730         re='\<(strn?casecmp|ffs(ll)?)\>'                                \
 731           $(_sc_header_without_use)
 732
 733 # Extract the raw list of symbol names with this:
 734 gl_extract_define_simple = \
 735   /^\# *define ([A-Z]\w+)\(/ and print $$1
 736 # Filter out duplicates and convert to a space-separated list:
 737 _intprops_names = \
 738   $(shell f=$(gnulib_dir)/lib/intprops.h;                               \
 739     perl -lne '$(gl_extract_define_simple)' $$f | sort -u | tr '\n' ' ')
 740 # Remove trailing space and convert to a regular expression:
 741 _intprops_syms_re = $(subst $(_sp),|,$(strip $(_intprops_names)))
 742 # Prohibit the inclusion of intprops.h without an actual use.
 743 sc_prohibit_intprops_without_use:
 744         @h='intprops.h'                                                 \
 745         re='\<($(_intprops_syms_re)) *\('                               \
 746           $(_sc_header_without_use)
 747
 748 _stddef_syms_re = NULL|offsetof|ptrdiff_t|size_t|wchar_t
 749 # Prohibit the inclusion of stddef.h without an actual use.
 750 sc_prohibit_stddef_without_use:
 751         @h='stddef.h'                                                   \
 752         re='\<($(_stddef_syms_re))\>'                                   \
 753           $(_sc_header_without_use)
 754
 755 _de1 = dirfd|(close|(fd)?open|read|rewind|seek|tell)dir(64)?(_r)?
 756 _de2 = (versionsort|struct dirent|getdirentries|alphasort|scandir(at)?)(64)?
 757 _de3 = MAXNAMLEN|DIR|ino_t|d_ino|d_fileno|d_namlen
 758 _dirent_syms_re = $(_de1)|$(_de2)|$(_de3)
 759 # Prohibit the inclusion of dirent.h without an actual use.
 760 sc_prohibit_dirent_without_use:
 761         @h='dirent.h'                                                   \
 762         re='\<($(_dirent_syms_re))\>'                                   \
 763           $(_sc_header_without_use)
 764
 765 # Prohibit the inclusion of verify.h without an actual use.
 766 sc_prohibit_verify_without_use:
 767         @h='verify.h'                                                   \
 768         re='\<(verify(true|expr)?|assume|static_assert) *\('            \
 769           $(_sc_header_without_use)
 770
 771 # Don't include xfreopen.h unless you use one of its functions.
 772 sc_prohibit_xfreopen_without_use:
 773         @h='xfreopen.h' re='\<xfreopen *\(' $(_sc_header_without_use)
 774
 775 sc_obsolete_symbols:
 776         @prohibit='\<(HAVE''_FCNTL_H|O''_NDELAY)\>'                     \
 777         halt='do not use HAVE''_FCNTL_H or O'_NDELAY                    \
 778           $(_sc_search_regexp)
 779
 780 # FIXME: warn about definitions of EXIT_FAILURE, EXIT_SUCCESS, STREQ
 781
 782 # Each nonempty ChangeLog line must start with a year number, or a TAB.
 783 sc_changelog:
 784         @prohibit='^[^12        ]'                                      \
 785         in_vc_files='^ChangeLog$$'                                      \
 786         halt='found unexpected prefix in a ChangeLog'                   \
 787           $(_sc_search_regexp)
 788
 789 # Ensure that each .c file containing a "main" function also
 790 # calls bindtextdomain.
 791 sc_bindtextdomain:
 792         @require='bindtextdomain *\('                                   \
 793         in_vc_files='\.c$$'                                             \
 794         containing='\<main *('                                          \
 795         halt='the above files do not call bindtextdomain'               \
 796           $(_sc_search_regexp)
 797
 798 # Require that the final line of each test-lib.sh-using test be this one:
 799 # Exit $fail
 800 # Note: this test requires GNU grep's --label= option.
 801 Exit_witness_file ?= tests/test-lib.sh
 802 Exit_base := $(notdir $(Exit_witness_file))
 803 sc_require_test_exit_idiom:
 804         @if test -f $(srcdir)/$(Exit_witness_file); then                \
 805           die=0;                                                        \
 806           for i in $$($(GREP) -l -F 'srcdir/$(Exit_base)'               \
 807                 $$($(VC_LIST) tests)); do                               \
 808             tail -n1 $$i | $(GREP) '^Exit .' > /dev/null                \
 809               && : || { die=1; echo $$i; }                              \
 810           done;                                                         \
 811           test $$die = 1 &&                                             \
 812             { echo 1>&2 '$(ME): the final line in each of the above is not:'; \
 813               echo 1>&2 'Exit something';                               \
 814               exit 1; } || :;                                           \
 815         fi
 816
 817 sc_trailing_blank:
 818         @prohibit='[     ]$$'                                           \
 819         halt='found trailing blank(s)'                                  \
 820         exclude='^Binary file .* matches$$'                             \
 821           $(_sc_search_regexp)
 822
 823 # Match lines like the following, but where there is only one space
 824 # between the options and the description:
 825 #   -D, --all-repeated[=delimit-method]  print all duplicate lines\n
 826 longopt_re = --[a-z][0-9A-Za-z-]*(\[?=[0-9A-Za-z-]*]?)?
 827 sc_two_space_separator_in_usage:
 828         @prohibit='^   *(-[A-Za-z],)? $(longopt_re) [^ ].*\\$$'         \
 829         halt='help2man requires at least two spaces between an option and its description'\
 830           $(_sc_search_regexp)
 831
 832 # A regexp matching function names like "error" that may be used
 833 # to emit translatable messages.
 834 _gl_translatable_diag_func_re ?= error
 835
 836 # Look for diagnostics that aren't marked for translation.
 837 # This won't find any for which error's format string is on a separate line.
 838 sc_unmarked_diagnostics:
 839         @prohibit='\<$(_gl_translatable_diag_func_re) *\([^"]*"[^"]*[a-z]{3}' \
 840         exclude='(_|ngettext ?)\('                                      \
 841         halt='found unmarked diagnostic(s)'                             \
 842           $(_sc_search_regexp)
 843
 844 # Avoid useless parentheses like those in this example:
 845 # #if defined (SYMBOL) || defined (SYM2)
 846 sc_useless_cpp_parens:
 847         @prohibit='^# *if .*defined *\('                                \
 848         halt='found useless parentheses in cpp directive'               \
 849           $(_sc_search_regexp)
 850
 851 # List headers for which HAVE_HEADER_H is always true, assuming you are
 852 # using the appropriate gnulib module.  CAUTION: for each "unnecessary"
 853 # #if HAVE_HEADER_H that you remove, be sure that your project explicitly
 854 # requires the gnulib module that guarantees the usability of that header.
 855 gl_assured_headers_ = \
 856   cd $(gnulib_dir)/lib && echo *.in.h|$(SED) 's/\.in\.h//g'
 857
 858 # Convert the list of names to upper case, and replace each space with "|".
 859 az_ = abcdefghijklmnopqrstuvwxyz
 860 AZ_ = ABCDEFGHIJKLMNOPQRSTUVWXYZ
 861 gl_header_upper_case_or_ =                                              \
 862   $$($(gl_assured_headers_)                                             \
 863     | tr $(az_)/.- $(AZ_)___                                            \
 864     | tr -s ' ' '|'                                                     \
 865     )
 866 sc_prohibit_always_true_header_tests:
 867         @or=$(gl_header_upper_case_or_);                                \
 868         re="HAVE_($$or)_H";                                             \
 869         prohibit='\<'"$$re"'\>'                                         \
 870         halt=$$(printf '%s\n'                                           \
 871         'do not test the above HAVE_<header>_H symbol(s);'              \
 872         '  with the corresponding gnulib module, they are always true') \
 873           $(_sc_search_regexp)
 874
 875 sc_prohibit_defined_have_decl_tests:
 876         @prohibit='(#[   ]*ifn?def|\<defined)\>[         (]+HAVE_DECL_' \
 877         halt='HAVE_DECL macros are always defined'                      \
 878           $(_sc_search_regexp)
 879
 880 # ==================================================================
 881 gl_other_headers_ ?= \
 882   intprops.h    \
 883   openat.h      \
 884   stat-macros.h
 885
 886 # Perl -lne code to extract "significant" cpp-defined symbols from a
 887 # gnulib header file, eliminating a few common false-positives.
 888 # The exempted names below are defined only conditionally in gnulib,
 889 # and hence sometimes must/may be defined in application code.
 890 gl_extract_significant_defines_ = \
 891   /^\# *define ([^_ (][^ (]*)(\s*\(|\s+\w+)/\
 892     && $$2 !~ /(?:rpl_|_used_without_)/\
 893     && $$1 !~ /^(?:NSIG|ENODATA)$$/\
 894     && $$1 !~ /^(?:SA_RESETHAND|SA_RESTART)$$/\
 895     and print $$1
 896
 897 # Create a list of regular expressions matching the names
 898 # of macros that are guaranteed to be defined by parts of gnulib.
 899 define def_sym_regex
 900         gen_h=$(gl_generated_headers_);                                 \
 901         (cd $(gnulib_dir)/lib;                                          \
 902           for f in *.in.h $(gl_other_headers_); do                      \
 903             test -f $$f                                                 \
 904               && perl -lne '$(gl_extract_significant_defines_)' $$f;    \
 905           done;                                                         \
 906         ) | sort -u                                                     \
 907           | $(SED) 's/^/^ *# *(define|undef)  */;s/$$/\\>/'
 908 endef
 909
 910 # Don't define macros that we already get from gnulib header files.
 911 sc_prohibit_always-defined_macros:
 912         @if test -d $(gnulib_dir); then                                 \
 913           case $$(echo all: | $(GREP) -l -f - Makefile) in Makefile);; *) \
 914             echo '$(ME): skipping $@: you lack GNU grep' 1>&2; exit 0;; \
 915           esac;                                                         \
 916           regex=$$($(def_sym_regex)); export regex;                     \
 917           $(VC_LIST_EXCEPT)                                             \
 918             | xargs sh -c 'echo $$regex | $(GREP) -E -f - "$$@"'        \
 919                 dummy /dev/null                                         \
 920             && { printf '$(ME): define the above'                       \
 921                         ' via some gnulib .h file\n' 1>&2;              \
 922                  exit 1; }                                              \
 923             || :;                                                       \
 924         fi
 925 # ==================================================================
 926
 927 # Prohibit checked in backup files.
 928 sc_prohibit_backup_files:
 929         @$(VC_LIST) | $(GREP) '~$$' &&                                  \
 930           { echo '$(ME): found version controlled backup file' 1>&2;    \
 931             exit 1; } || :
 932
 933 # Require the latest GPL.
 934 sc_GPL_version:
 935         @prohibit='either ''version [^3]'                               \
 936         halt='GPL vN, N!=3'                                             \
 937           $(_sc_search_regexp)
 938
 939 # Require the latest GFDL.  Two regexp, since some .texi files end up
 940 # line wrapping between 'Free Documentation License,' and 'Version'.
 941 _GFDL_regexp = (Free ''Documentation.*Version 1\.[^3]|Version 1\.[^3] or any)
 942 sc_GFDL_version:
 943         @prohibit='$(_GFDL_regexp)'                                     \
 944         halt='GFDL vN, N!=3'                                            \
 945           $(_sc_search_regexp)
 946
 947 # Don't use Texinfo's @acronym{}.
 948 # https://lists.gnu.org/r/bug-gnulib/2010-03/msg00321.html
 949 texinfo_suffix_re_ ?= \.(txi|texi(nfo)?)$$
 950 sc_texinfo_acronym:
 951         @prohibit='@acronym\{'                                          \
 952         in_vc_files='$(texinfo_suffix_re_)'                             \
 953         halt='found use of Texinfo @acronym{}'                          \
 954           $(_sc_search_regexp)
 955
 956 cvs_keywords = \
 957   Author|Date|Header|Id|Name|Locker|Log|RCSfile|Revision|Source|State
 958
 959 sc_prohibit_cvs_keyword:
 960         @prohibit='\$$($(cvs_keywords))\$$'                             \
 961         halt='do not use CVS keyword expansion'                         \
 962           $(_sc_search_regexp)
 963
 964 # This Perl code is slightly obfuscated.  Not only is each "$" doubled
 965 # because it's in a Makefile, but the $$c's are comments;  we cannot
 966 # use "#" due to the way the script ends up concatenated onto one line.
 967 # It would be much more concise, and would produce better output (including
 968 # counts) if written as:
 969 #   perl -ln -0777 -e '/\n(\n+)$/ and print "$ARGV: ".length $1' ...
 970 # but that would be far less efficient, reading the entire contents
 971 # of each file, rather than just the last two bytes of each.
 972 # In addition, while the code below detects both blank lines and a missing
 973 # newline at EOF, the above detects only the former.
 974 #
 975 # This is a perl script that is expected to be the single-quoted argument
 976 # to a command-line "-le".  The remaining arguments are file names.
 977 # Print the name of each file that does not end in exactly one newline byte.
 978 # I.e., warn if there are blank lines (2 or more newlines), or if the
 979 # last byte is not a newline.  However, currently we don't complain
 980 # about any file that contains exactly one byte.
 981 # Exit nonzero if at least one such file is found, otherwise, exit 0.
 982 # Warn about, but otherwise ignore open failure.  Ignore seek/read failure.
 983 #
 984 # Use this if you want to remove trailing empty lines from selected files:
 985 #   perl -pi -0777 -e 's/\n\n+$/\n/' files...
 986 #
 987 require_exactly_one_NL_at_EOF_ =                                        \
 988   foreach my $$f (@ARGV)                                                \
 989     {                                                                   \
 990       open F, "<", $$f or (warn "failed to open $$f: $$!\n"), next;     \
 991       my $$p = sysseek (F, -2, 2);                                      \
 992       my $$c = "seek failure probably means file has < 2 bytes; ignore"; \
 993       my $$last_two_bytes;                                              \
 994       defined $$p and $$p = sysread F, $$last_two_bytes, 2;             \
 995       close F;                                                          \
 996       $$c = "ignore read failure";                                      \
 997       $$p && ($$last_two_bytes eq "\n\n"                                \
 998               || substr ($$last_two_bytes,1) ne "\n")                   \
 999           and (print $$f), $$fail=1;                                    \
1000     }                                                                   \
1001   END { exit defined $$fail }
1002 sc_prohibit_empty_lines_at_EOF:
1003         @$(VC_LIST_EXCEPT)                                              \
1004           | xargs perl -le '$(require_exactly_one_NL_at_EOF_)'          \
1005           || { echo '$(ME): empty line(s) or no newline at EOF' 1>&2;   \
1006                exit 1; }                                                \
1007           || :
1008
1009 # Make sure we don't use st_blocks.  Use ST_NBLOCKS instead.
1010 # This is a bit of a kludge, since it prevents use of the string
1011 # even in comments, but for now it does the job with no false positives.
1012 sc_prohibit_stat_st_blocks:
1013         @prohibit='[.>]st_blocks'                                       \
1014         halt='do not use st_blocks; use ST_NBLOCKS'                     \
1015           $(_sc_search_regexp)
1016
1017 # Make sure we don't define any S_IS* macros in src/*.c files.
1018 # They're already defined via gnulib's sys/stat.h replacement.
1019 sc_prohibit_S_IS_definition:
1020         @prohibit='^ *# *define  *S_IS'                                 \
1021         halt='do not define S_IS* macros; include <sys/stat.h>'         \
1022           $(_sc_search_regexp)
1023
1024 # Perl block to convert a match to FILE_NAME:LINENO:TEST,
1025 # that is shared by two definitions below.
1026 perl_filename_lineno_text_ =                                            \
1027     -e '  {'                                                            \
1028     -e '    $$n = ($$` =~ tr/\n/\n/ + 1);'                              \
1029     -e '    ($$v = $$&) =~ s/\n/\\n/g;'                                 \
1030     -e '    print "$$ARGV:$$n:$$v\n";'                                  \
1031     -e '  }'
1032
1033 prohibit_doubled_words_ = \
1034     the then in an on if is it but for or at and do to can
1035 # expand the regex before running the check to avoid using expensive captures
1036 prohibit_doubled_word_expanded_ = \
1037     $(join $(prohibit_doubled_words_),$(addprefix \s+,$(prohibit_doubled_words_)))
1038 prohibit_doubled_word_RE_ ?= \
1039     /\b(?:$(subst $(_sp),|,$(prohibit_doubled_word_expanded_)))\b/gims
1040 prohibit_doubled_word_ =                                                \
1041     -e 'while ($(prohibit_doubled_word_RE_))'                           \
1042     $(perl_filename_lineno_text_)
1043
1044 # Define this to a regular expression that matches
1045 # any filename:dd:match lines you want to ignore.
1046 # The default is to ignore no matches.
1047 ignore_doubled_word_match_RE_ ?= ^$$
1048
1049 sc_prohibit_doubled_word:
1050         @$(VC_LIST_EXCEPT)                                              \
1051           | xargs perl -n -0777 $(prohibit_doubled_word_)               \
1052           | $(GREP) -vE '$(ignore_doubled_word_match_RE_)'              \
1053           | $(GREP) .                                                   \
1054           && { echo '$(ME): doubled words' 1>&2; exit 1; }              \
1055           || :
1056
1057 # A regular expression matching undesirable combinations of words like
1058 # "can not"; this matches them even when the two words appear on different
1059 # lines, but not when there is an intervening delimiter like "#" or "*".
1060 # Similarly undesirable, "See @xref{...}", since an @xref should start
1061 # a sentence.  Explicitly prohibit any prefix of "see" or "also".
1062 # Also prohibit a prefix matching "\w+ +".
1063 # @pxref gets the same see/also treatment and should be parenthesized;
1064 # presume it must *not* start a sentence.
1065 # POSIX spells it "timestamp" rather than "time\s+stamp", so we do, too.
1066 bad_xref_re_ ?= (?:[\w,:;] +|(?:see|also)\s+)\@xref\{
1067 bad_pxref_re_ ?= (?:[.!?]|(?:see|also))\s+\@pxref\{
1068 prohibit_undesirable_word_seq_RE_ ?=                                    \
1069   /(?:\bcan\s+not\b|\btime\s+stamps?\b|$(bad_xref_re_)|$(bad_pxref_re_))/gims
1070 prohibit_undesirable_word_seq_ =                                        \
1071     -e 'while ($(prohibit_undesirable_word_seq_RE_))'                   \
1072     $(perl_filename_lineno_text_)
1073 # Define this to a regular expression that matches
1074 # any filename:dd:match lines you want to ignore.
1075 # The default is to ignore no matches.
1076 ignore_undesirable_word_sequence_RE_ ?= ^$$
1077
1078 sc_prohibit_undesirable_word_seq:
1079         @$(VC_LIST_EXCEPT)                                              \
1080           | xargs perl -n -0777 $(prohibit_undesirable_word_seq_)       \
1081           | $(GREP) -vE '$(ignore_undesirable_word_sequence_RE_)'       \
1082           | $(GREP) .                                                   \
1083           && { echo '$(ME): undesirable word sequence' >&2; exit 1; }   \
1084           || :
1085
1086 # Except for shell files and for loops, double semicolon is probably a mistake
1087 sc_prohibit_double_semicolon:
1088         @prohibit='; *;[        {} \]*(/[/*]|$$)'                       \
1089         in_vc_files='\.[chly]$$'                                        \
1090         exclude='\bfor *\(.*\)'                                         \
1091         halt="Double semicolon detected"                                \
1092           $(_sc_search_regexp)
1093
1094 _ptm1 = use "test C1 && test C2", not "test C1 -''a C2"
1095 _ptm2 = use "test C1 || test C2", not "test C1 -''o C2"
1096 # Using test's -a and -o operators is not portable.
1097 # We prefer test over [, since the latter is spelled [[ in configure.ac.
1098 sc_prohibit_test_minus_ao:
1099         @prohibit='(\<test| \[+) .+ -[ao] '                             \
1100         halt='$(_ptm1); $(_ptm2)'                                       \
1101           $(_sc_search_regexp)
1102
1103 # Avoid a test bashism.
1104 sc_prohibit_test_double_equal:
1105         @prohibit='(\<test| \[+) .+ == '                                \
1106         containing='#! */bin/[a-z]*sh'                                  \
1107         halt='use "test x = x", not "test x =''= x"'                    \
1108           $(_sc_search_regexp)
1109
1110 # Each program that uses proper_name_utf8 must link with one of the
1111 # ICONV libraries.  Otherwise, some ICONV library must appear in LDADD.
1112 # The perl -0777 invocation below extracts the possibly-multi-line
1113 # definition of LDADD from the appropriate Makefile.am and exits 0
1114 # when it contains "ICONV".
1115 sc_proper_name_utf8_requires_ICONV:
1116         @progs=$$($(VC_LIST_EXCEPT)                                     \
1117                     | xargs $(GREP) -l 'proper_name_utf8 ''("');        \
1118         if test "x$$progs" != x; then                                   \
1119           fail=0;                                                       \
1120           for p in $$progs; do                                          \
1121             dir=$$(dirname "$$p");                                      \
1122             perl -0777                                                  \
1123               -ne 'exit !(/^LDADD =(.+?[^\\]\n)/ms && $$1 =~ /ICONV/)'  \
1124               $$dir/Makefile.am && continue;                            \
1125             base=$$(basename "$$p" .c);                                 \
1126             $(GREP) "$${base}_LDADD.*ICONV)" $$dir/Makefile.am > /dev/null      \
1127               || { fail=1; echo 1>&2 "$(ME): $$p uses proper_name_utf8"; }; \
1128           done;                                                         \
1129           test $$fail = 1 &&                                            \
1130             { echo 1>&2 '$(ME): the above do not link with any ICONV library'; \
1131               exit 1; } || :;                                           \
1132         fi
1133
1134 # Warn about "c0nst struct Foo const foo[]",
1135 # but not about "char const *const foo" or "#define const const".
1136 sc_redundant_const:
1137         @prohibit='\bconst\b[[:space:][:alnum:]]{2,}\bconst\b'          \
1138         halt='redundant "const" in declarations'                        \
1139           $(_sc_search_regexp)
1140
1141 sc_const_long_option:
1142         @prohibit='^ *static.*struct option '                           \
1143         exclude='const struct option|struct option const'               \
1144         halt='add "const" to the above declarations'                    \
1145           $(_sc_search_regexp)
1146
1147 NEWS_hash =                                                             \
1148   $$($(SED) -n '/^\*.* $(PREV_VERSION_REGEXP) ([0-9-]*)/,$$p'           \
1149        $(srcdir)/NEWS                                                   \
1150      | perl -0777 -pe                                                   \
1151         's/^Copyright.+?Free\sSoftware\sFoundation,\sInc\.\n//ms'       \
1152      | md5sum -                                                         \
1153      | $(SED) 's/ .*//')
1154
1155 # Ensure that we don't accidentally insert an entry into an old NEWS block.
1156 sc_immutable_NEWS:
1157         @if test -f $(srcdir)/NEWS; then                                \
1158           test "$(NEWS_hash)" = '$(old_NEWS_hash)' && : ||              \
1159             { echo '$(ME): you have modified old NEWS' 1>&2; exit 1; }; \
1160         fi
1161
1162 # Update the hash stored above.  Do this after each release and
1163 # for any corrections to old entries.
1164 update-NEWS-hash: NEWS
1165         perl -pi -e 's/^(old_NEWS_hash[ \t]+:?=[ \t]+).*/$${1}'"$(NEWS_hash)/" \
1166           $(srcdir)/cfg.mk
1167
1168 # Ensure that we use only the standard $(VAR) notation,
1169 # not @...@ in Makefile.am, now that we can rely on automake
1170 # to emit a definition for each substituted variable.
1171 # However, there is still one case in which @VAR@ use is not just
1172 # legitimate, but actually required: when augmenting an automake-defined
1173 # variable with a prefix.  For example, gettext uses this:
1174 # MAKEINFO = env LANG= LC_MESSAGES= LC_ALL= LANGUAGE= @MAKEINFO@
1175 # otherwise, makeinfo would put German or French (current locale)
1176 # navigation hints in the otherwise-English documentation.
1177 #
1178 # Allow the package to add exceptions via a hook in cfg.mk;
1179 # for example, @PRAGMA_SYSTEM_HEADER@ can be permitted by
1180 # setting this to ' && !/PRAGMA_SYSTEM_HEADER/'.
1181 _makefile_at_at_check_exceptions ?=
1182 sc_makefile_at_at_check:
1183         @perl -ne '/\@\w+\@/'                                           \
1184           -e ' && !/(\w+)\s+=.*\@\1\@$$/'                               \
1185           -e ''$(_makefile_at_at_check_exceptions)                      \
1186           -e 'and (print "$$ARGV:$$.: $$_"), $$m=1; END {exit !$$m}'    \
1187             $$($(VC_LIST_EXCEPT) | $(GREP) -E '(^|/)(Makefile\.am|[^/]+\.mk)$$') \
1188           && { echo '$(ME): use $$(...), not @...@' 1>&2; exit 1; } || :
1189
1190 news-check: NEWS
1191         $(AM_V_GEN)if $(SED) -n $(news-check-lines-spec)p $<            \
1192             | $(GREP) -E $(news-check-regexp) >/dev/null; then          \
1193           :;                                                            \
1194         else                                                            \
1195           echo 'NEWS: $$(news-check-regexp) failed to match' 1>&2;      \
1196           exit 1;                                                       \
1197         fi
1198
1199 sc_makefile_TAB_only_indentation:
1200         @prohibit='^    [ ]{8}'                                         \
1201         in_vc_files='akefile|\.mk$$'                                    \
1202         halt='found TAB-8-space indentation'                            \
1203           $(_sc_search_regexp)
1204
1205 sc_m4_quote_check:
1206         @prohibit='(AC_DEFINE(_UNQUOTED)?|AC_DEFUN)\([^[]'              \
1207         in_vc_files='(^configure\.ac|\.m4)$$'                           \
1208         halt='quote the first arg to AC_DEF*'                           \
1209           $(_sc_search_regexp)
1210
1211 fix_po_file_diag = \
1212 'you have changed the set of files with translatable diagnostics;\n\
1213 apply the above patch\n'
1214
1215 # Generate a list of files in which to search for translatable strings.
1216 perl_translatable_files_list_ =                                         \
1217   -e 'foreach $$file (@ARGV) {'                                         \
1218   -e '  \# Consider only file extensions with one or two letters'       \
1219   -e '  $$file =~ /\...?$$/ or next;'                                   \
1220   -e '  \# Ignore m4 and mk files'                                      \
1221   -e '  $$file =~ /\.m[4k]$$/ and next;'                                \
1222   -e '  \# Ignore a .c or .h file with a corresponding .l or .y file'   \
1223   -e '  $$file =~ /(.+)\.[ch]$$/ && (-e "$${1}.l" || -e "$${1}.y")'     \
1224   -e '    and next;'                                                    \
1225   -e '  \# Skip unreadable files'                                       \
1226   -e '  -r $$file or next;'                                             \
1227   -e '  print "$$file ";'                                               \
1228   -e '}'
1229
1230 # Verify that all source files using _() (more specifically, files that
1231 # match $(_gl_translatable_string_re)) are listed in po/POTFILES.in.
1232 po_file ?= $(srcdir)/po/POTFILES.in
1233 generated_files ?= $(srcdir)/lib/*.[ch]
1234 _gl_translatable_string_re ?= \b(N?_|gettext *)\([^)"]*("|$$)
1235 sc_po_check:
1236         @if test -f $(po_file); then                                    \
1237           $(GREP) -E -v '^(#|$$)' $(po_file)                            \
1238             | $(GREP) -v '^src/false\.c$$' | sort > $@-1;               \
1239           { $(VC_LIST_EXCEPT); echo $(generated_files); }               \
1240             | xargs perl $(perl_translatable_files_list_)               \
1241             | xargs $(GREP) -E -l '$(_gl_translatable_string_re)'       \
1242             | $(SED) 's|^$(_dot_escaped_srcdir)/||'                     \
1243             | sort -u > $@-2;                                           \
1244           diff -u -L $(po_file) -L $(po_file) $@-1 $@-2                 \
1245             || { printf '$(ME): '$(fix_po_file_diag) 1>&2; exit 1; };   \
1246           rm -f $@-1 $@-2;                                              \
1247         fi
1248
1249 # Sometimes it is useful to change the PATH environment variable
1250 # in Makefiles.  When doing so, it's better not to use the Unix-centric
1251 # path separator of ':', but rather the automake-provided '$(PATH_SEPARATOR)'.
1252 msg = 'Do not use ":" above; use $$(PATH_SEPARATOR) instead'
1253 sc_makefile_path_separator_check:
1254         @prohibit='PATH[=].*:'                                          \
1255         in_vc_files='akefile|\.mk$$'                                    \
1256         halt=$(msg)                                                     \
1257           $(_sc_search_regexp)
1258
1259 sc_makefile_DISTCHECK_CONFIGURE_FLAGS:
1260         @prohibit='^DISTCHECK_CONFIGURE_FLAGS'                          \
1261         in_vc_files='akefile|\.mk$$'                                    \
1262         halt="use AM_DISTCHECK_CONFIGURE_FLAGS"                         \
1263           $(_sc_search_regexp)
1264
1265 # Check that 'make alpha' will not fail at the end of the process,
1266 # i.e., when pkg-M.N.tar.xz already exists (either in "." or in ../release)
1267 # and is read-only.
1268 writable-files:
1269         $(AM_V_GEN)if test -d $(release_archive_dir); then              \
1270           for file in $(DIST_ARCHIVES); do                              \
1271             for p in ./ $(release_archive_dir)/; do                     \
1272               test -e $$p$$file || continue;                            \
1273               test -w $$p$$file                                         \
1274                 || { echo ERROR: $$p$$file is not writable; fail=1; };  \
1275             done;                                                       \
1276           done;                                                         \
1277           test "$$fail" && exit 1 || : ;                                \
1278         else :;                                                         \
1279         fi
1280
1281 v_etc_file = $(gnulib_dir)/lib/version-etc.c
1282 sample-test = tests/sample-test
1283 texi = doc/$(PACKAGE).texi
1284 # Make sure that the copyright date in $(v_etc_file) is up to date.
1285 # Do the same for the $(sample-test) and the main doc/.texi file.
1286 sc_copyright_check:
1287         @require='enum { COPYRIGHT_YEAR = '$$(date +%Y)' };'            \
1288         in_files=$(v_etc_file)                                          \
1289         halt='out of date copyright in $(v_etc_file); update it'        \
1290           $(_sc_search_regexp)
1291         @require='# Copyright \(C\) '$$(date +%Y)' Free'                \
1292         in_vc_files=$(sample-test)                                      \
1293         halt='out of date copyright in $(sample-test); update it'       \
1294           $(_sc_search_regexp)
1295         @require='Copyright @copyright\{\} .*'$$(date +%Y)              \
1296         in_vc_files=$(texi)                                             \
1297         halt='out of date copyright in $(texi); update it'              \
1298           $(_sc_search_regexp)
1299
1300 # If tests/help-version exists and seems to be new enough, assume that its
1301 # use of init.sh and path_prepend_ is correct, and ensure that every other
1302 # use of init.sh is identical.
1303 # This is useful because help-version cross-checks prog --version
1304 # with $(VERSION), which verifies that its path_prepend_ invocation
1305 # sets PATH correctly.  This is an inexpensive way to ensure that
1306 # the other init.sh-using tests also get it right.
1307 _hv_file ?= $(srcdir)/tests/help-version
1308 _hv_regex_weak ?= ^ *\. .*/init\.sh"
1309 # Fix syntax-highlighters "
1310 _hv_regex_strong ?= ^ *\. "\$${srcdir=\.}/init\.sh"
1311 sc_cross_check_PATH_usage_in_tests:
1312         @if test -f $(_hv_file); then                                   \
1313           $(GREP) -l 'VERSION mismatch' $(_hv_file) >/dev/null          \
1314             || { echo "$@: skipped: no such file: $(_hv_file)" 1>&2;    \
1315                  exit 0; };                                             \
1316           $(GREP) -lE '$(_hv_regex_strong)' $(_hv_file) >/dev/null      \
1317             || { echo "$@: $(_hv_file) lacks conforming use of init.sh" 1>&2; \
1318                  exit 1; };                                             \
1319           good=$$($(GREP) -E '$(_hv_regex_strong)' $(_hv_file));        \
1320           $(VC_LIST_EXCEPT)                                             \
1321             | xargs $(GREP) -lE '$(_hv_regex_weak)'                     \
1322             | xargs $(GREP) -LFx "$$good"                               \
1323             | $(GREP) .                                                 \
1324             && { printf "$(ME): the above files use"                    \
1325                         " path_prepend_ inconsistently\n" 1>&2;         \
1326                  exit 1; }                                              \
1327             || :;                                                       \
1328         fi
1329
1330 # BRE regex of file contents to identify a test script.
1331 _test_script_regex ?= \<init\.sh\>
1332
1333 # In tests, use "compare expected actual", not the reverse.
1334 sc_prohibit_reversed_compare_failure:
1335         @prohibit='\<compare [^ ]+ ([^ ]*exp|/dev/null)'                \
1336         containing='$(_test_script_regex)'                              \
1337         halt='reversed compare arguments'                               \
1338           $(_sc_search_regexp)
1339
1340 # #if HAVE_... will evaluate to false for any non numeric string.
1341 # That would be flagged by using -Wundef, however gnulib currently
1342 # tests many undefined macros, and so we can't enable that option.
1343 # So at least preclude common boolean strings as macro values.
1344 sc_Wundef_boolean:
1345         @prohibit='^#define.*(yes|no|true|false)$$'                     \
1346         in_files='$(CONFIG_INCLUDE)'                                    \
1347         halt='Use 0 or 1 for macro values'                              \
1348           $(_sc_search_regexp)
1349
1350 # Even if you use pathmax.h to guarantee that PATH_MAX is defined, it might
1351 # not be constant, or might overflow a stack.  In general, use PATH_MAX as
1352 # a limit, not an array or alloca size.
1353 sc_prohibit_path_max_allocation:
1354         @prohibit='(\balloca *\([^)]*|\[[^]]*)\bPATH_MAX'               \
1355         halt='Avoid stack allocations of size PATH_MAX'                 \
1356           $(_sc_search_regexp)
1357
1358 sc_vulnerable_makefile_CVE-2009-4029:
1359         @prohibit='perm -777 -exec chmod a\+rwx|chmod 777 \$$\(distdir\)' \
1360         in_files='(^|/)Makefile\.in$$'                                  \
1361         halt=$$(printf '%s\n'                                           \
1362           'the above files are vulnerable; beware of running'           \
1363           '  "make dist*" rules, and upgrade to fixed automake'         \
1364           '  see https://bugzilla.redhat.com/show_bug.cgi?id=542609 for details') \
1365           $(_sc_search_regexp)
1366
1367 sc_vulnerable_makefile_CVE-2012-3386:
1368         @prohibit='chmod a\+w \$$\(distdir\)'                           \
1369         in_files='(^|/)Makefile\.in$$'                                  \
1370         halt=$$(printf '%s\n'                                           \
1371           'the above files are vulnerable; beware of running'           \
1372           '  "make distcheck", and upgrade to fixed automake'           \
1373           '  see https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-3386 for details') \
1374           $(_sc_search_regexp)
1375
1376 vc-diff-check:
1377         $(AM_V_GEN)(unset CDPATH; cd $(srcdir) && $(VC) diff) > vc-diffs || :
1378         $(AM_V_at)if test -s vc-diffs; then                     \
1379           cat vc-diffs;                                         \
1380           echo "Some files are locally modified:" 1>&2;         \
1381           exit 1;                                               \
1382         else                                                    \
1383           rm vc-diffs;                                          \
1384         fi
1385
1386 rel-files = $(DIST_ARCHIVES)
1387
1388 gnulib-version = $$(cd $(gnulib_dir)                            \
1389                     && { git describe || git rev-parse --short=10 HEAD; } )
1390 bootstrap-tools ?= autoconf,automake,gnulib
1391
1392 gpgv = $$(gpgv2 --version >/dev/null && echo gpgv2 || echo gpgv)
1393 # If it's not already specified, derive the GPG key ID from
1394 # the signed tag we've just applied to mark this release.
1395 gpg_key_ID ?=                                                           \
1396   $$(cd $(srcdir)                                                       \
1397      && git cat-file tag v$(VERSION)                                    \
1398         | $(gpgv) --status-fd 1 --keyring /dev/null - - 2>/dev/null     \
1399         | $(AWK) '/^\[GNUPG:] ERRSIG / {print $$3; exit}')
1400 gpg_key_email ?=                                                        \
1401   $$(gpg --list-key --with-colons $(gpg_key_ID) 2>/dev/null             \
1402         | $(AWK) -F: '/^uid/ {print $$10; exit}'                        \
1403         | $(SED) -n 's/.*<\(.*\)>/\1/p')
1404 gpg_keyring_url ?= https://savannah.gnu.org/project/release-gpgkeys.php?group=$(PACKAGE)&download=1
1405
1406 translation_project_ ?= coordinator@translationproject.org
1407
1408 # Make info-gnu the default only for a stable release.
1409 announcement_Cc_stable = $(translation_project_), $(PACKAGE_BUGREPORT)
1410 announcement_mail_headers_stable =              \
1411   To: info-gnu@gnu.org                          \
1412   Cc: $(announcement_Cc_)                       \
1413   Mail-Followup-To: $(PACKAGE_BUGREPORT)
1414
1415 announcement_Cc_alpha = $(translation_project_)
1416 announcement_mail_headers_alpha =               \
1417   To: $(PACKAGE_BUGREPORT)                      \
1418   Cc: $(announcement_Cc_)
1419
1420 announcement_mail_Cc_beta = $(announcement_mail_Cc_alpha)
1421 announcement_mail_headers_beta = $(announcement_mail_headers_alpha)
1422
1423 announcement_Cc_ ?= $(announcement_Cc_$(release-type))
1424 announcement_mail_headers_ ?= $(announcement_mail_headers_$(release-type))
1425 announcement: NEWS ChangeLog $(rel-files)
1426 # Not $(AM_V_GEN) since the output of this command serves as
1427 # announcement message: it would start with " GEN announcement".
1428         $(AM_V_at)$(srcdir)/$(_build-aux)/announce-gen                  \
1429             --mail-headers='$(announcement_mail_headers_)'              \
1430             --release-type=$(release-type)                              \
1431             --package=$(PACKAGE)                                        \
1432             --prev=$(PREV_VERSION)                                      \
1433             --curr=$(VERSION)                                           \
1434             --gpg-key-id=$(gpg_key_ID)                                  \
1435             $$(test -n "$(gpg_key_email)" &&                            \
1436                echo --gpg-key-email="$(gpg_key_email)")                 \
1437             $$(test -n "$(gpg_keyring_url)" &&                          \
1438                echo --gpg-keyring-url="$(gpg_keyring_url)")             \
1439             --srcdir=$(srcdir)                                          \
1440             --news=$(srcdir)/NEWS                                       \
1441             --bootstrap-tools=$(bootstrap-tools)                        \
1442             $$(case ,$(bootstrap-tools), in (*,gnulib,*)                \
1443                echo --gnulib-version=$(gnulib-version);; esac)          \
1444             $(addprefix --url-dir=, $(url_dir_list))
1445
1446 .PHONY: release-commit
1447 release-commit:
1448         $(AM_V_GEN)cd $(srcdir)                         \
1449           && $(_build-aux)/do-release-commit-and-tag    \
1450                -C $(abs_builddir) $(RELEASE)
1451
1452 ## ---------------- ##
1453 ## Updating files.  ##
1454 ## ---------------- ##
1455
1456 ftp-gnu = https://ftp.gnu.org/gnu
1457 www-gnu = https://www.gnu.org
1458
1459 upload_dest_dir_ ?= $(PACKAGE)
1460 upload_command =                                                \
1461   $(srcdir)/$(_build-aux)/gnupload $(GNUPLOADFLAGS)             \
1462   --to $(gnu_rel_host):$(upload_dest_dir_)                      \
1463   $(rel-files)
1464 emit_upload_commands:
1465         @echo =====================================
1466         @echo =====================================
1467         @echo '$(upload_command)'
1468         @echo '# send the ~/announce-$(my_distdir) e-mail'
1469         @echo =====================================
1470         @echo =====================================
1471
1472 .PHONY: upload
1473 upload:
1474         $(AM_V_GEN)$(upload_command)
1475
1476 define emit-commit-log
1477   printf '%s\n' 'maint: post-release administrivia' ''                  \
1478     '* NEWS: Add header line for next release.'                         \
1479     '* .prev-version: Record previous version.'                         \
1480     '* cfg.mk (old_NEWS_hash): Auto-update.'
1481 endef
1482
1483 .PHONY: no-submodule-changes
1484 no-submodule-changes:
1485         $(AM_V_GEN)if test -d $(srcdir)/.git                            \
1486                 && git --version >/dev/null 2>&1; then                  \
1487           diff=$$(cd $(srcdir) && git submodule -q foreach              \
1488                   git diff-index --name-only HEAD)                      \
1489             || exit 1;                                                  \
1490           case $$diff in '') ;;                                         \
1491             *) echo '$(ME): submodule files are locally modified:';     \
1492                 echo "$$diff"; exit 1;; esac;                           \
1493         else                                                            \
1494           : ;                                                           \
1495         fi
1496
1497 submodule-checks ?= no-submodule-changes public-submodule-commit
1498
1499 # Ensure that each sub-module commit we're using is public.
1500 # Without this, it is too easy to tag and release code that
1501 # cannot be built from a fresh clone.
1502 .PHONY: public-submodule-commit
1503 public-submodule-commit:
1504         $(AM_V_GEN)if test -d $(srcdir)/.git                            \
1505                 && git --version >/dev/null 2>&1; then                  \
1506           cd $(srcdir) &&                                               \
1507           git submodule --quiet foreach                                 \
1508               'test "$$(git rev-parse "$$sha1")"                        \
1509                   = "$$(git merge-base origin "$$sha1")"'               \
1510             || { echo '$(ME): found non-public submodule commit' >&2;   \
1511                  exit 1; };                                             \
1512         else                                                            \
1513           : ;                                                           \
1514         fi
1515 # This rule has a high enough utility/cost ratio that it should be a
1516 # dependent of "check" by default.  However, some of us do occasionally
1517 # commit a temporary change that deliberately points to a non-public
1518 # submodule commit, and want to be able to use rules like "make check".
1519 # In that case, run e.g., "make check gl_public_submodule_commit="
1520 # to disable this test.
1521 gl_public_submodule_commit ?= public-submodule-commit
1522 check: $(gl_public_submodule_commit)
1523
1524 .PHONY: alpha beta stable release
1525 ALL_RECURSIVE_TARGETS += alpha beta stable
1526 alpha beta stable: $(local-check) writable-files $(submodule-checks)
1527         $(AM_V_GEN)test $@ = stable                                     \
1528           && { echo $(VERSION) | $(GREP) -E '^[0-9]+(\.[0-9]+)+$$'      \
1529                || { echo "invalid version string: $(VERSION)" 1>&2; exit 1;};}\
1530           || :
1531         $(AM_V_at)$(MAKE) vc-diff-check
1532         $(AM_V_at)$(MAKE) news-check
1533         $(AM_V_at)$(MAKE) distcheck
1534         $(AM_V_at)$(MAKE) dist
1535         $(AM_V_at)$(MAKE) $(release-prep-hook) RELEASE_TYPE=$@
1536         $(AM_V_at)$(MAKE) -s emit_upload_commands RELEASE_TYPE=$@
1537
1538 release:
1539         $(AM_V_GEN)$(MAKE) _version
1540         $(AM_V_at)$(MAKE) $(release-type)
1541
1542 # Override this in cfg.mk if you follow different procedures.
1543 release-prep-hook ?= release-prep
1544
1545 gl_noteworthy_news_ = * Noteworthy changes in release ?.? (????-??-??) [?]
1546 .PHONY: release-prep
1547 release-prep:
1548         $(AM_V_GEN)$(MAKE) --no-print-directory -s announcement \
1549           > ~/announce-$(my_distdir)
1550         $(AM_V_at)if test -d $(release_archive_dir); then       \
1551           ln $(rel-files) $(release_archive_dir);               \
1552           chmod a-w $(rel-files);                               \
1553         fi
1554         $(AM_V_at)echo $(VERSION) > $(prev_version_file)
1555         $(AM_V_at)$(MAKE) update-NEWS-hash
1556         $(AM_V_at)perl -pi                                              \
1557           -e '$$. == 3 and print "$(gl_noteworthy_news_)\n\n\n"'        \
1558           $(srcdir)/NEWS
1559         $(AM_V_at)msg=$$($(emit-commit-log)) || exit 1;         \
1560         cd $(srcdir) && $(VC) commit -m "$$msg" -a
1561
1562 # Override this with e.g., -s $(srcdir)/some_other_name.texi
1563 # if the default $(PACKAGE)-derived name doesn't apply.
1564 gendocs_options_ ?=
1565
1566 .PHONY: web-manual
1567 web-manual:
1568         $(AM_V_GEN)test -z "$(manual_title)" \
1569           && { echo define manual_title in cfg.mk 1>&2; exit 1; } || :
1570         $(AM_V_at)cd '$(srcdir)/doc'; \
1571           $(SHELL) ../$(_build-aux)/gendocs.sh $(gendocs_options_) \
1572              -o '$(abs_builddir)/doc/manual' \
1573              --email $(PACKAGE_BUGREPORT) $(PACKAGE) \
1574             "$(PACKAGE_NAME) - $(manual_title)"
1575         $(AM_V_at)echo " *** Upload the doc/manual directory to web-cvs."
1576
1577 .PHONY: web-manual-update
1578 web-manual-update:
1579         $(AM_V_GEN)cd $(srcdir) \
1580           && $(_build-aux)/gnu-web-doc-update -C $(abs_builddir)
1581
1582
1583 # Code Coverage
1584
1585 init-coverage:
1586         $(MAKE) $(AM_MAKEFLAGS) clean
1587         lcov --directory . --zerocounters
1588
1589 COVERAGE_CCOPTS ?= "-g --coverage"
1590 COVERAGE_OUT ?= doc/coverage
1591
1592 build-coverage:
1593         $(MAKE) $(AM_MAKEFLAGS) CFLAGS=$(COVERAGE_CCOPTS) CXXFLAGS=$(COVERAGE_CCOPTS)
1594         $(MAKE) $(AM_MAKEFLAGS) CFLAGS=$(COVERAGE_CCOPTS) CXXFLAGS=$(COVERAGE_CCOPTS) check
1595         mkdir -p $(COVERAGE_OUT)
1596         lcov --directory . --output-file $(COVERAGE_OUT)/$(PACKAGE).info \
1597                 --capture
1598
1599 gen-coverage:
1600         genhtml --output-directory $(COVERAGE_OUT) \
1601                 $(COVERAGE_OUT)/$(PACKAGE).info \
1602                 --highlight --frames --legend \
1603                 --title "$(PACKAGE_NAME)"
1604
1605 coverage:
1606         $(MAKE) init-coverage
1607         $(MAKE) build-coverage
1608         $(MAKE) gen-coverage
1609
1610 # Some projects carry local adjustments for gnulib modules via patches in
1611 # a gnulib patch directory whose default name is gl/ (defined in bootstrap
1612 # via local_gl_dir=gl).  Those patches become stale as the originals evolve
1613 # in gnulib.  Use this rule to refresh any stale patches.  It applies each
1614 # patch to the original in $(gnulib_dir) and uses the temporary result to
1615 # generate a fuzz-free .diff file.  If you customize the name of your local
1616 # gnulib patch directory via bootstrap.conf, this rule detects that name.
1617 # Run this from a non-VPATH (i.e., srcdir) build directory.
1618 .PHONY: refresh-gnulib-patches
1619 refresh-gnulib-patches:
1620         gl=gl;                                                          \
1621         if test -f bootstrap.conf; then                                 \
1622           t=$$(perl -lne '/^\s*local_gl_dir=(\S+)/ and $$d=$$1;'        \
1623                -e 'END{defined $$d and print $$d}' bootstrap.conf);     \
1624           test -n "$$t" && gl=$$t;                                      \
1625         fi;                                                             \
1626         for diff in $$(cd $$gl; git ls-files | $(GREP) '\.diff$$'); do  \
1627           b=$$(printf %s "$$diff"|$(SED) 's/\.diff$$//');               \
1628           VERSION_CONTROL=none                                          \
1629             patch "$(gnulib_dir)/$$b" "$$gl/$$diff" || exit 1;          \
1630           ( cd $(gnulib_dir) || exit 1;                                 \
1631             git diff "$$b" > "../$$gl/$$diff";                          \
1632             git checkout $$b ) || exit 1;                               \
1633         done
1634
1635 # Update gettext files.
1636 PACKAGE ?= $(shell basename $(PWD))
1637 PO_DOMAIN ?= $(PACKAGE)
1638 POURL = https://translationproject.org/latest/$(PO_DOMAIN)/
1639 PODIR ?= po
1640 refresh-po:
1641         rm -f $(PODIR)/*.po && \
1642         echo "$(ME): getting translations into po (please ignore the robots.txt ERROR 404)..." && \
1643         wget --no-verbose --directory-prefix $(PODIR) --no-directories --recursive --level 1 --accept .po --accept .po.1 $(POURL) && \
1644         echo 'en@boldquot' > $(PODIR)/LINGUAS && \
1645         echo 'en@quot' >> $(PODIR)/LINGUAS && \
1646         ls $(PODIR)/*.po | $(SED) 's/\.po//;s,$(PODIR)/,,' | \
1647           sort >> $(PODIR)/LINGUAS
1648
1649 # Indentation
1650
1651 indent_args ?= -ppi 1
1652 C_SOURCES ?= $$($(VC_LIST_EXCEPT) | grep '\.[ch]\(.in\)\?$$')
1653 INDENT_SOURCES ?= $(C_SOURCES)
1654 exclude_file_name_regexp--indent ?= $(exclude_file_name_regexp--sc_indent)
1655
1656 .PHONY: indent
1657 indent: # Running indent once is not idempotent, but running it twice is.
1658         $(AM_V_GEN)indent $(indent_args) $(INDENT_SOURCES) && \
1659         indent $(indent_args) $(INDENT_SOURCES)
1660
1661 sc_indent:
1662         @if ! command -v indent > /dev/null; then                       \
1663             echo 1>&2 '$(ME): sc_indent: indent is missing';            \
1664         else                                                            \
1665           fail=0; files="$(INDENT_SOURCES)";                            \
1666           for f in $$files; do                                          \
1667             indent $(indent_args) -st $$f                               \
1668                 | indent $(indent_args) -st -                           \
1669                 | diff -u $$f - || fail=1;                              \
1670           done;                                                         \
1671           test $$fail = 1 &&                                            \
1672             { echo 1>&2 '$(ME): code format error, try "make indent"';  \
1673               exit 1; } || :;                                           \
1674         fi
1675
1676 # If you want to set UPDATE_COPYRIGHT_* environment variables,
1677 # put the assignments in this variable.
1678 update-copyright-env ?=
1679
1680 # Run this rule once per year (usually early in January)
1681 # to update all FSF copyright year lists in your project.
1682 # If you have an additional project-specific rule,
1683 # add it in cfg.mk along with a line 'update-copyright: prereq'.
1684 # By default, exclude all variants of COPYING; you can also
1685 # add exemptions (such as ChangeLog..* for rotated change logs)
1686 # in the file .x-update-copyright.
1687 .PHONY: update-copyright
1688 update-copyright:
1689         $(AM_V_GEN)$(GREP) -l -w Copyright                               \
1690           $$(export VC_LIST_EXCEPT_DEFAULT=COPYING && $(VC_LIST_EXCEPT)) \
1691           | $(update-copyright-env) xargs $(srcdir)/$(_build-aux)/$@
1692
1693 # This tight_scope test is skipped with a warning if $(_gl_TS_headers) is not
1694 # overridden and $(_gl_TS_dir)/Makefile.am does not mention noinst_HEADERS.
1695
1696 # NOTE: to override any _gl_TS_* default value, you must
1697 # define the variable(s) using "export" in cfg.mk.
1698 _gl_TS_dir ?= src
1699
1700 ALL_RECURSIVE_TARGETS += sc_tight_scope
1701 sc_tight_scope: tight-scope.mk
1702         @fail=0;                                                        \
1703         if ! $(GREP) '^ *export _gl_TS_headers *=' $(srcdir)/cfg.mk     \
1704                 > /dev/null                                             \
1705            && ! $(GREP) -w noinst_HEADERS $(srcdir)/$(_gl_TS_dir)/Makefile.am \
1706                 > /dev/null 2>&1; then                                  \
1707             echo '$(ME): skipping $@';                                  \
1708         else                                                            \
1709             $(MAKE) -s -C $(_gl_TS_dir)                                 \
1710                 -f Makefile                                             \
1711                 -f $(abs_top_srcdir)/cfg.mk                             \
1712                 -f $(abs_top_builddir)/$<                               \
1713               _gl_tight_scope                                           \
1714                 || fail=1;                                              \
1715         fi;                                                             \
1716         rm -f $<;                                                       \
1717         exit $$fail
1718
1719 tight-scope.mk: $(ME)
1720         @perl -ne '/^# TS-start/.../^# TS-end/ and print' $(srcdir)/$(ME) > $@-t
1721         @mv $@-t $@
1722
1723 ifeq (a,b)
1724 # TS-start
1725
1726 # Most functions should have static scope.
1727 # Any that don't must be marked with 'extern', but 'main'
1728 # and 'usage' are exceptions: they're always extern, but
1729 # do not need to be marked.  Symbols matching '__.*' are
1730 # reserved by the compiler, so are automatically excluded below.
1731 _gl_TS_unmarked_extern_functions ?= main usage
1732 _gl_TS_function_match ?= /^(?:$(_gl_TS_extern)) +.*?(\w+) *\(/
1733
1734 # If your project uses a macro like "XTERN", then put
1735 # the following in cfg.mk to override this default:
1736 # export _gl_TS_extern = extern|XTERN
1737 _gl_TS_extern ?= extern
1738
1739 # The second nm|grep checks for file-scope variables with 'extern' scope.
1740 # Without gnulib's progname module, you might put program_name here.
1741 # Symbols matching '__.*' are reserved by the compiler,
1742 # so are automatically excluded below.
1743 _gl_TS_unmarked_extern_vars ?=
1744
1745 # NOTE: the _match variables are perl expressions -- not mere regular
1746 # expressions -- so that you can extend them to match other patterns
1747 # and easily extract matched variable names.
1748 # For example, if your project declares some global variables via
1749 # a macro like this: GLOBAL(type, var_name, initializer), then you
1750 # can override this definition to automatically extract those names:
1751 # export _gl_TS_var_match = \
1752 #   /^(?:$(_gl_TS_extern)) .*?\**(\w+)(\[.*?])?;/ || /\bGLOBAL\(.*?,\s*(.*?),/
1753 _gl_TS_var_match ?= /^(?:$(_gl_TS_extern)) .*?(\w+)(\[.*?])?;/
1754
1755 # The names of object files in (or relative to) $(_gl_TS_dir).
1756 _gl_TS_obj_files ?= *.$(OBJEXT)
1757
1758 # Files in which to search for the one-line style extern declarations.
1759 # $(_gl_TS_dir)-relative.
1760 _gl_TS_headers ?= $(noinst_HEADERS)
1761 _gl_TS_other_headers ?= *.h
1762
1763 .PHONY: _gl_tight_scope
1764 _gl_tight_scope: $(bin_PROGRAMS)
1765         sed_wrap='s/^/^_?/;s/$$/$$/';                                   \
1766         t=exceptions-$$$$;                                              \
1767         trap 's=$$?; rm -f $$t; exit $$s' 0;                            \
1768         for sig in 1 2 3 13 15; do                                      \
1769           eval "trap 'v=`expr $$sig + 128`; (exit $$v); exit $$v' $$sig"; \
1770         done;                                                           \
1771         src=`for f in $(SOURCES); do                                    \
1772                test -f $$f && d= || d=$(srcdir)/; echo $$d$$f; done`;   \
1773         hdr=`for f in $(_gl_TS_headers); do                             \
1774                test -f $$f && d= || d=$(srcdir)/; echo $$d$$f; done`;   \
1775         ( printf '%s\n' '__.*' $(_gl_TS_unmarked_extern_functions);     \
1776           $(GREP) -h -A1 '^extern .*[^;]$$' $$src                       \
1777             | $(GREP) -vE '^(extern |--|#)' | $(SED) 's/ .*//; /^$$/d'; \
1778           perl -lne                                                     \
1779              '$(_gl_TS_function_match) and print $$1' $$hdr;            \
1780         ) | sort -u | $(SED) "$$sed_wrap" > $$t;                        \
1781         nm -g $(_gl_TS_obj_files)|$(SED) -n 's/.* T //p'|$(GREP) -Ev -f $$t \
1782           && { echo the above functions should have static scope >&2;   \
1783                exit 1; } || : ;                                         \
1784         ( printf '%s\n' '__.*' main $(_gl_TS_unmarked_extern_vars);     \
1785           perl -lne '$(_gl_TS_var_match) and print $$1'                 \
1786                 $$hdr $(_gl_TS_other_headers)                           \
1787         ) | sort -u | $(SED) "$$sed_wrap" > $$t;                        \
1788         nm -g $(_gl_TS_obj_files) | $(SED) -n 's/.* [BCDGRS] //p'       \
1789             | sort -u | $(GREP) -Ev -f $$t                              \
1790           && { echo the above variables should have static scope >&2;   \
1791                exit 1; } || :
1792 # TS-end
1793 endif