cfg.mk

   1 # Customize maint.mk                           -*- makefile -*-
   2 # Copyright (C) 2003-2024 Free Software Foundation, Inc.
   3
   4 # This program is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  16
  17 # Used in maint.mk's web-manual rule
  18 manual_title = Core GNU utilities
  19
  20 # Use the direct link.  This is guaranteed to work immediately, while
  21 # it can take a while for the faster mirror links to become usable.
  22 url_dir_list = https://ftp.gnu.org/gnu/$(PACKAGE)
  23
  24 # Exclude bundled external projects from syntax checks
  25 VC_LIST_ALWAYS_EXCLUDE_REGEX = src/blake2/.*$$
  26
  27 # Tests not to run as part of "make distcheck".
  28 local-checks-to-skip = \
  29   sc_indent
  30
  31 # Tools used to bootstrap this package, used for "announcement".
  32 bootstrap-tools = autoconf,automake,gnulib,bison
  33
  34 # Now that we have better tests, make this the default.
  35 export VERBOSE = yes
  36
  37 # Comparing tarball sizes compressed using different xz presets, we see that
  38 # an -8e-compressed tarball is only 9KiB larger than the -9e-compressed one.
  39 # Using -8e is preferred, since that lets the decompression process use half
  40 # the memory (32MiB rather than 64MiB).
  41 # $ for i in {7,8,9}{e,}; do \
  42 #     (n=$(xz -$i < coreutils-8.15*.tar|wc -c);echo $n $i) & done |sort -nr
  43 # 5129388 7
  44 # 5036524 7e
  45 # 5017476 8
  46 # 5010604 9
  47 # 4923016 8e
  48 # 4914152 9e
  49 export XZ_OPT = -8e
  50
  51 old_NEWS_hash = d66ee7a9fdb974017a4a17cf358d047d
  52
  53 # Add an exemption for sc_makefile_at_at_check.
  54 _makefile_at_at_check_exceptions = \
  55   ' && !/MAKEINFO/ && !/^cu_install_prog/ && !/dynamic-dep/'
  56
  57 # Our help-version script is in a slightly different location.
  58 _hv_file ?= $(srcdir)/tests/misc/help-version
  59
  60 # Ensure that the list of O_ symbols used to compute O_FULLBLOCK is complete.
  61 dd = $(srcdir)/src/dd.c
  62 sc_dd_O_FLAGS:
  63         @rm -f $@.1 $@.2
  64         @{ echo O_FULLBLOCK; echo O_NOCACHE;                            \
  65           perl -nle '/^ +\| (O_\w*)$$/ and print $$1' $(dd); } | sort > $@.1
  66         @{ echo O_NOFOLLOW; perl -nle '/{"[a-z]+",\s*(O_\w+)},/ and print $$1' \
  67           $(dd); } | sort > $@.2
  68         @diff -u $@.1 $@.2; diff=$$?;                                   \
  69         rm -f $@.1 $@.2;                                                \
  70         test "$$diff" = 0                                               \
  71           || { echo '$(ME): $(dd) has inconsistent O_ flag lists'>&2;   \
  72                exit 1; }
  73
  74 # Ensure that dd's definition of LONGEST_SYMBOL stays in sync
  75 # with the strings from the two affected variables.
  76 dd_c = $(srcdir)/src/dd.c
  77 sc_dd_max_sym_length:
  78 ifneq ($(wildcard $(dd_c)),)
  79         @len=$$( (sed -n '/conversions\[] =$$/,/^};/p' $(dd_c);\
  80                  sed -n '/flags\[] =$$/,/^};/p' $(dd_c) )       \
  81                 |sed -n '/"/s/^[^"]*"\([^"]*\)".*/\1/p'| wc -L);\
  82         max=$$(sed -n '/^#define LONGEST_SYMBOL /s///p' $(dd_c) \
  83               |tr -d '"' | wc -L);              \
  84         if test "$$len" = "$$max"; then :; else                 \
  85           echo 'dd.c: LONGEST_SYMBOL is not longest' 1>&2;      \
  86           exit 1;                                               \
  87         fi
  88 endif
  89
  90 # Many m4 macros names once began with 'jm_'.
  91 # On 2004-04-13, they were all changed to start with gl_ instead.
  92 # Make sure that none are inadvertently reintroduced.
  93 sc_prohibit_jm_in_m4:
  94         @grep -nE 'jm_[A-Z]'                                            \
  95                 $$($(VC_LIST) m4 |grep '\.m4$$'; echo /dev/null) &&     \
  96             { echo '$(ME): do not use jm_ in m4 macro names'            \
  97               1>&2; exit 1; } || :
  98
  99 # Ensure that each root-requiring test is run via the "check-root" rule.
 100 sc_root_tests:
 101         @t1=sc-root.expected; t2=sc-root.actual;                        \
 102         grep -nl '^ *require_root_$$' `$(VC_LIST) tests` |              \
 103           sed 's|.*/tests/|tests/|' | sort > $$t1;                      \
 104         for t in $(all_root_tests); do echo $$t; done | sort > $$t2;    \
 105         st=0; diff -u $$t1 $$t2 || st=1;                                \
 106         rm -f $$t1 $$t2;                                                \
 107         exit $$st
 108
 109 # Ensure that all version-controlled test cases are listed in $(all_tests).
 110 sc_tests_list_consistency:
 111         @bs="\\";                                                       \
 112         test_extensions_rx=`echo $(TEST_EXTENSIONS)                     \
 113           | sed -e "s/ /|/g" -e "s/$$bs./$$bs$$bs./g"`;                 \
 114         {                                                               \
 115           for t in $(all_tests); do echo $$t; done;                     \
 116           cd $(top_srcdir);                                             \
 117           $(SHELL) build-aux/vc-list-files tests                        \
 118             | grep -Ev '^tests/(factor/(run|create-test)|init)\.sh$$'   \
 119             | grep -E "$$test_extensions_rx\$$";                        \
 120         } | sort | uniq -u | grep . && exit 1; :
 121
 122 # Ensure that all version-controlled test scripts are executable.
 123 sc_tests_executable:
 124         @set -o noglob 2>/dev/null || set -f;                              \
 125         cd $(srcdir);                                                      \
 126         find_ext="-name '' "`printf -- "-o -name *%s " $(TEST_EXTENSIONS)`;\
 127         find $(srcdir)/tests/ \( $$find_ext \) \! -perm -u+x -print        \
 128           | { sed "s|^$(srcdir)/||"; git ls-files $(srcdir)/tests/; }      \
 129           | sort | uniq -d                                                 \
 130           | sed -e "s/^/$(ME): Please make test executable: /" | grep .    \
 131             && exit 1; :
 132
 133 # Ensure all gnulib patches apply cleanly
 134 sc_ensure_gl_diffs_apply_cleanly:
 135         @find $(srcdir)/gl/ -name '*.diff' | while read p; do           \
 136           patch --fuzz=0 -f -s -d $(srcdir)/gnulib/ -p1 --dry-run < "$$p" >&2 \
 137             || { echo "$$p" >&2; echo 'To refresh all gl patches run:'  \
 138                  'make refresh-gnulib-patches' >&2; exit 1; }           \
 139         done
 140
 141 # Avoid :>file which doesn't propagate errors
 142 sc_prohibit_colon_redirection:
 143         @cd $(srcdir)/tests && GIT_PAGER= git grep -En ': *>.*\|\|'     \
 144           && { echo '$(ME): '"The leading colon in :> will hide errors" >&2; \
 145                exit 1; }  \
 146           || :
 147
 148 # Ensure emit_mandatory_arg_note() is called if required
 149 sc_ensure_emit_mandatory_arg_note:
 150         @cd $(srcdir)/src && GIT_PAGER= git \
 151           grep -l -- '^ *-[^-].*--.*[^[]=' *.c \
 152           | xargs grep -L emit_mandatory_arg_note | grep . \
 153           && { echo '$(ME): '"emit_mandatory_arg_note() missing" 1>&2; \
 154                exit 1; } || :
 155
 156 # Create a list of regular expressions matching the names
 157 # of files included from system.h.  Exclude a couple.
 158 .re-list:
 159         @sed -n '/^# *include /s///p' $(srcdir)/src/system.h \
 160           | grep -Ev 'sys/(param|file)\.h' \
 161           | sed 's/ .*//;;s/^["<]/^# *include [<"]/;s/\.h[">]$$/\\.h[">]/' \
 162           > $@-t
 163         @mv $@-t $@
 164
 165 define gl_trap_
 166   Exit () { set +e; (exit $$1); exit $$1; };                            \
 167   for sig in 1 2 3 13 15; do                                            \
 168     eval "trap 'Exit $$(expr $$sig + 128)' $$sig";                      \
 169   done
 170 endef
 171
 172 # Files in src/ should not include directly any of
 173 # the headers already included via system.h.
 174 sc_system_h_headers: .re-list
 175         @if test -f $(srcdir)/src/system.h; then                        \
 176           trap 'rc=$$?; rm -f .re-list; exit $$rc' 0;                   \
 177           $(gl_trap_);                                                  \
 178           grep -nE -f .re-list                                          \
 179               $$($(VC_LIST_EXCEPT) | grep -E '^($(srcdir)/)?src/')      \
 180             && { echo '$(ME): the above are already included via system.h'\
 181                   1>&2;  exit 1; } || :;                                \
 182         fi
 183
 184 # Files in src/ should not use '%s' notation in format strings,
 185 # i.e., single quotes around %s (or similar) should be avoided.
 186 sc_prohibit_quotes_notation:
 187         @cd $(srcdir)/src && GIT_PAGER= git grep -n "\".*[\`']%s'.*\"" *.c \
 188           && { echo '$(ME): '"Use quote() to avoid quoted '%s' notation" 1>&2; \
 189                exit 1; }  \
 190           || :
 191
 192 error_fns = (error|diagnose)
 193
 194 # Files in src/ should quote all strings in error() output, so that
 195 # unexpected input chars like \r etc. don't corrupt the error.
 196 # In edge cases this can be avoided by putting the format string
 197 # on a separate line to the arguments, or the arguments in parenthesis.
 198 sc_error_quotes:
 199         @cd $(srcdir)/src \
 200           && GIT_PAGER= git grep -E -n '$(error_fns) *\(.*%s.*, [^(]*\);$$' \
 201           *.c | grep -v ', q' \
 202           && { echo '$(ME): '"Use quote() for error string arguments" 1>&2; \
 203                exit 1; }  \
 204           || :
 205
 206 # Files in src/ should quote all file names in error() output
 207 # using quotef(), to provide quoting only when necessary,
 208 # but also provide better support for copy and paste when used.
 209 sc_error_shell_quotes:
 210         @cd $(srcdir)/src && \
 211           { GIT_PAGER= git grep -E \
 212             '$(error_fns) \(.*%s[:"], .*(name|file)[^"]*\);$$' *.c; \
 213             GIT_PAGER= git grep -E \
 214             ' quote[ _].*file' *.c; } \
 215           | grep -Ev '(quotef|q[^ ]*name)' \
 216           && { echo '$(ME): '"Use quotef() for colon delimited names" 1>&2; \
 217                exit 1; }  \
 218           || :
 219
 220 # Files in src/ should quote all file names in error() output
 221 # using quoteaf() when the name is separated with spaces,
 222 # to distinguish the file name at issue and
 223 # to provide better support for copy and paste.
 224 sc_error_shell_always_quotes:
 225         @cd $(srcdir)/src && GIT_PAGER= git grep -E \
 226             '$(error_fns) \(.*[^:] %s[ "].*, .*(name|file)[^"]*\);$$' \
 227             *.c | grep -Ev '(quoteaf|q[^ ]*name)' \
 228           && { echo '$(ME): '"Use quoteaf() for space delimited names" 1>&2; \
 229                exit 1; }  \
 230           || :
 231         @cd $(srcdir)/src && GIT_PAGER= git grep -E -A1 \
 232             '$(error_fns) \([^%]*[^:] %s[ "]' *.c | grep 'quotef' \
 233           && { echo '$(ME): '"Use quoteaf() for space delimited names" 1>&2; \
 234                exit 1; }  \
 235           || :
 236
 237 # Avoid unstyled quoting to internal slots and thus destined for diagnostics
 238 # as that can leak unescaped control characters to the output, when using
 239 # the default "literal" quoting style.
 240 # Instead use quotef(), or quoteaf() or in edge cases quotearg_n_style_colon().
 241 # A more general PCRE would be @prohibit='quotearg_.*(?!(style|buffer))'
 242 sc_prohibit-quotearg:
 243         @prohibit='quotearg(_n)?(|_colon|_char|_mem) ' \
 244         in_vc_files='\.c$$' \
 245         halt='Unstyled diagnostic quoting detected' \
 246           $(_sc_search_regexp)
 247
 248 sc_prohibit-skip:
 249         @prohibit='\|\| skip ' \
 250         halt='Use skip_ not skip' \
 251           $(_sc_search_regexp)
 252
 253 sc_sun_os_names:
 254         @grep -nEi \
 255             'solaris[^[:alnum:]]*2\.(7|8|9|[1-9][0-9])|sunos[^[:alnum:]][6-9]' \
 256             $$($(VC_LIST_EXCEPT)) &&                                    \
 257           { echo '$(ME): found misuse of Sun OS version numbers' 1>&2;  \
 258             exit 1; } || :
 259
 260 # Ensure that the list of programs and author names is accurate.
 261 # We need a UTF8 locale.  If a lack of locale support or a missing
 262 # translation inhibits printing of UTF-8 names, just skip this test.
 263 au_dotdot = authors-dotdot
 264 au_actual = authors-actual
 265 sc_check-AUTHORS: $(all_programs)
 266         @locale=en_US.UTF-8;                            \
 267         LC_ALL=$$locale ./src/factor --version          \
 268             | grep ' Torbjorn ' > /dev/null             \
 269           && { echo "$@: skipping this check"; exit 0; }; \
 270         rm -f $(au_actual) $(au_dotdot);                \
 271         for i in `ls $(all_programs)                    \
 272             | sed -e 's,^src/,,' -e 's,$(EXEEXT)$$,,'   \
 273             | sed /libstdbuf/d                          \
 274             | $(ASSORT) -u`; do                         \
 275           test "$$i" = '[' && continue;                 \
 276           exe=$$i;                                      \
 277           if test "$$i" = install; then                 \
 278             exe=ginstall;                               \
 279           elif test "$$i" = test; then                  \
 280             exe='[';                                    \
 281           fi;                                           \
 282           LC_ALL=$$locale ./src/$$exe --version         \
 283             | perl -0 -p -e 's/,\n/, /gm'               \
 284             | sed -n -e '/Written by /{ s//'"$$i"': /;' \
 285                   -e 's/,* and /, /; s/\.$$//; p; }';   \
 286         done > $(au_actual) &&                          \
 287         sed -n '/^[^ ][^ ]*:/p' $(srcdir)/AUTHORS > $(au_dotdot) \
 288           && diff $(au_actual) $(au_dotdot) \
 289           && rm -f $(au_actual) $(au_dotdot)
 290
 291 # Ensure the alternative __attribute (keyword) form isn't used as
 292 # that form is not elided where required.  Also ensure that we don't
 293 # directly use attributes already defined by gnulib.
 294 # TODO: move the check for _GL... attributes to gnulib.
 295 sc_prohibit-gl-attributes:
 296         @prohibit='__attribute |__(unused|pure|const)__'        \
 297         in_vc_files='\.[ch]$$'                                  \
 298         halt='Use _GL... attribute macros'                      \
 299           $(_sc_search_regexp)
 300
 301 # Prefer the const declaration form, with const following the type
 302 sc_prohibit-const-char:
 303         @prohibit='const char \*'                               \
 304         in_vc_files='\.[ch]$$'                                  \
 305         halt='Use char const *, not const char *'               \
 306           $(_sc_search_regexp)
 307
 308 # Look for lines longer than 80 characters, except omit:
 309 # - urls
 310 # - the fdl.texi file copied from gnulib,
 311 # - the help2man script copied from upstream,
 312 # - tests involving long checksum lines, and
 313 # - the 'pr' test cases.
 314 FILTER_LONG_LINES =                                             \
 315   \|^[^:]*NEWS:.*https\{,1\}://| d;                                     \
 316   \|^[^:]*doc/fdl.texi:| d;                                     \
 317   \|^[^:]*man/help2man:| d;                                     \
 318   \|^[^:]*tests/cksum/sha[0-9]*sum.*\.pl[-:]| d;                        \
 319   \|^[^:]*tests/pr/|{ \|^[^:]*tests/pr/pr-tests:| !d; };
 320 sc_long_lines:
 321         @wc -L /dev/null >/dev/null 2>/dev/null                         \
 322            || { echo "$@: skipping: wc -L not supported"; exit 0; };    \
 323         sed -r 1q /dev/null 2>/dev/null                                 \
 324            || { echo "$@: skipping: sed -r not supported"; exit 0; };   \
 325         files=$$($(VC_LIST_EXCEPT) | xargs wc -L | sed -rn '/ total$$/d;\
 326                   s/^ *(8[1-9]|9[0-9]|[0-9]{3,}) //p');                 \
 327         halt='line(s) with more than 80 characters; reindent';          \
 328         for file in $$files; do                                         \
 329           expand $$file | grep -nE '^.{80}.' |                          \
 330           sed -e "s|^|$$file:|" -e '$(FILTER_LONG_LINES)';              \
 331         done | grep . && { msg="$$halt" $(_sc_say_and_exit) } || :
 332
 333 # Option descriptions should not start with a capital letter.
 334 # One could grep source directly as follows:
 335 # grep -E " {2,6}-.*[^.]  [A-Z][a-z]" $$($(VC_LIST_EXCEPT) | grep '\.c$$')
 336 # but that would miss descriptions not on the same line as the -option.
 337 sc_option_desc_uppercase: $(ALL_MANS)
 338         @grep '^\\fB\\-' -A1 man/*.1 | LC_ALL=C grep '\.1.[A-Z][a-z]'   \
 339           && { echo 1>&2 '$@: found initial capitals in --help'; exit 1; } || :
 340
 341 # '--' should not be treated as '–' (U+2013 EN DASH) in long option names.
 342 sc_texi_long_option_escaped: doc/coreutils.info
 343         @grep ' –[^ ]' '$<'                                           \
 344           && { echo 1>&2 '$@: found unquoted --long-option'; exit 1; } || :
 345
 346 # Ensure all man/*.[1x] files are present.
 347 sc_man_file_correlation: check-x-vs-1 check-programs-vs-x
 348
 349 # Ensure that for each .x file in the 'man/' subdirectory, there is a
 350 # corresponding .1 file in the definition of $(EXTRA_MANS).
 351 # But since that expansion usually lacks programs like arch and hostname,
 352 # add them here manually.
 353 .PHONY: check-x-vs-1
 354 check-x-vs-1:
 355         @PATH=./src$(PATH_SEPARATOR)$$PATH; export PATH;                \
 356         t=$@-t;                                                         \
 357         (cd $(srcdir)/man && ls -1 *.x)                                 \
 358           | sed 's/\.x$$//' | $(ASSORT) > $$t;                          \
 359         (echo $(patsubst man/%,%,$(ALL_MANS))                           \
 360           | tr -s ' ' '\n' | sed 's/\.1$$//')                           \
 361           | $(ASSORT) -u | diff - $$t || { rm $$t; exit 1; };           \
 362         rm $$t
 363
 364 # Ensure that non-trivial .x files in the 'man/' subdirectory,
 365 # i.e., files exceeding a line count of 20 or a byte count of 1000,
 366 # contain a Copyright notice.
 367 .PHONY: sc_man_check_x_copyright
 368 sc_man_check_x_copyright:
 369         @status=0;                                                      \
 370         cd $(srcdir) && wc -cl man/*.x | head -n-1                      \
 371           | awk '$$1 >= 20 || $$2 >= 1000 {print $$3}'                  \
 372           | xargs grep -L 'Copyright .* Free Software Foundation'       \
 373           | grep .                                                      \
 374           && { echo  1>&2 '$@: exceeding file size/line count limit'    \
 375                   '- please add a copyright note'; status=1; };         \
 376         exit $$status
 377
 378 # Writing a portable rule to generate a manpage like '[.1' would be
 379 # a nightmare, so filter that out.
 380 all-progs-but-lbracket = $(filter-out [,$(patsubst src/%,%,$(all_programs)))
 381
 382 # Ensure that for each coreutils program there is a corresponding
 383 # '.x' file in the 'man/' subdirectory.
 384 .PHONY: check-programs-vs-x
 385 check-programs-vs-x:
 386         @status=0;                                      \
 387         for p in dummy $(all-progs-but-lbracket); do    \
 388           case $$p in *.so) continue;; esac;            \
 389           test $$p = dummy && continue;                 \
 390           test $$p = ginstall && p=install || : ;       \
 391           test -f $(srcdir)/man/$$p.x                   \
 392             || { echo missing $$p.x 1>&2; status=1; };  \
 393         done;                                           \
 394         exit $$status
 395
 396 # Ensure we can check out on case insensitive file systems
 397 sc_case_insensitive_file_names: src/uniq
 398         @git -C $(srcdir) ls-files | sort -f | src/uniq -Di | grep . && \
 399           { echo "$(ME): the above file(s) conflict on case insensitive" \
 400           " file systems" 1>&2; exit 1; } || :
 401
 402 # Ensure that the end of each release's section is marked by two empty lines.
 403 sc_NEWS_two_empty_lines:
 404         @sed -n 4,/Noteworthy/p $(srcdir)/NEWS                          \
 405             | perl -n0e '/(^|\n)\n\n\* Noteworthy/ or exit 1'           \
 406           || { echo '$(ME): use two empty lines to separate NEWS sections' \
 407                  1>&2; exit 1; } || :
 408
 409 # With split lines, don't leave an operator at end of line.
 410 # Instead, put it on the following line, where it is more apparent.
 411 # Don't bother checking for "*" at end of line, since it provokes
 412 # far too many false positives, matching constructs like "TYPE *".
 413 # Similarly, omit "=" (initializers).
 414 binop_re_ ?= [-/+^!<>]|[-/+*^!<>=]=|&&?|\|\|?|<<=?|>>=?
 415 sc_prohibit_operator_at_end_of_line:
 416         @prohibit='. ($(binop_re_))$$'                                  \
 417         in_vc_files='\.[chly]$$'                                        \
 418         halt='found operator at end of line'                            \
 419           $(_sc_search_regexp)
 420
 421 # Partial substitutes for GNU extensions \< and \> in regexps.
 422 begword = (^|[^_[:alnum:]])
 423 endword = ($$|[^_[:alnum:]])
 424
 425 # Don't use address of "stat" or "lstat" functions
 426 sc_prohibit_stat_macro_address:
 427         @prohibit='$(begword)l?stat '':|&l?stat$(endword)'              \
 428         halt='stat() and lstat() may be function-like macros'           \
 429           $(_sc_search_regexp)
 430
 431 # Ensure that date's --help output stays in sync with the info
 432 # documentation for GNU strftime.  The only exception is %N and %q,
 433 # which date accepts but GNU strftime does not.
 434 #
 435 # "info foo" fails with error, but not "info foo >/dev/null".
 436 extract_char = sed 's/^[^%][^%]*%\(.\).*/\1/'
 437 sc_strftime_check:
 438         @if test -f $(srcdir)/src/date.c; then                          \
 439           if info libc date calendar format 2>/dev/null |               \
 440                 grep "^ *['\`]%.'$$" >$@-tmp; then                      \
 441             { echo N; echo q; $(extract_char) $@-tmp; }| sort           \
 442               >$@-info;                                                 \
 443             grep '^  %.  ' $(srcdir)/src/date.c | sort                  \
 444               | $(extract_char) > $@-src;                               \
 445             diff -u $@-src $@-info || exit 1;                           \
 446           else                                                          \
 447             echo '$(ME): skipping $@: libc info not installed' 1>&2;    \
 448           fi;                                                           \
 449           rm -f $@-info $@-src $@-tmp;                                  \
 450         fi
 451
 452 # Indent only with spaces.
 453 sc_prohibit_tab_based_indentation:
 454         @prohibit='^ *  '                                               \
 455         halt='TAB in indentation; use only spaces'                      \
 456           $(_sc_search_regexp)
 457
 458 # Enforce lowercase 'e' in "I.e.".
 459 sc_prohibit_uppercase_id_est:
 460         @prohibit='I\.E\.'                                              \
 461         halt='Uppercase "Id Est" abbreviation; use "I.e.," instead'     \
 462           $(_sc_search_regexp)
 463
 464 # Enforce double-space before "I.e." at the beginning of a sentence.
 465 sc_ensure_dblspace_after_dot_before_id_est:
 466         @prohibit='\. I\.e\.'                                           \
 467         halt='Single space after dot before "i.e."; use ".  i.e." instead' \
 468           $(_sc_search_regexp)
 469
 470 # Enforce comma after "i.e." (at least before a blank or at EOL).
 471 sc_ensure_comma_after_id_est:
 472         @prohibit='[Ii]\.e\.( |$$)'                                     \
 473         halt='Missing comma after "i.e."; use "i.e.," instead'          \
 474           $(_sc_search_regexp)
 475
 476 # The SEE ALSO section of a man page should not be terminated with
 477 # a period.  Check the first line after each "SEE ALSO" line in man/*.x:
 478 sc_prohibit_man_see_also_period:
 479         @grep -nB1 '\.$$' $$($(VC_LIST_EXCEPT) | grep 'man/.*\.x$$')    \
 480             | grep -A1 -e '-\[SEE ALSO]' | grep '\.$$' &&               \
 481           { echo '$(ME): do not end "SEE ALSO" section with a period'   \
 482               1>&2; exit 1; } || :
 483
 484 sc_prohibit_exit_write_error:
 485         @prohibit='error.*EXIT_FAILURE.*write error' \
 486         in_vc_files='\.c$$' \
 487         halt='Use write_error() instead' \
 488           $(_sc_search_regexp)
 489
 490 sc_prohibit_NULL:
 491         @prohibit='$(begword)NULL$(endword)'                            \
 492         in_vc_files='\.[ch]$$'                                          \
 493         halt='use nullptr instead'                                      \
 494           $(_sc_search_regexp)
 495
 496 # Don't use "indent-tabs-mode: nil" anymore.  No longer needed.
 497 sc_prohibit_emacs__indent_tabs_mode__setting:
 498         @prohibit='^( *[*#] *)?indent-tabs-mode:'                       \
 499         halt='use of emacs indent-tabs-mode: setting'                   \
 500           $(_sc_search_regexp)
 501
 502 # Ensure that tests don't include a redundant fail=0.
 503 sc_prohibit_fail_0:
 504         @prohibit='$(begword)fail=0$(endword)'                          \
 505         halt='fail=0 initialization'                                    \
 506           $(_sc_search_regexp)
 507
 508 # Ensure that tests don't use `cmd ... && fail=1` as that hides crashes.
 509 # The "exclude" expression allows common idioms like `test ... && fail=1`
 510 # and the 2>... portion allows commands that redirect stderr and so probably
 511 # independently check its contents and thus detect any crash messages.
 512 sc_prohibit_and_fail_1:
 513         @prohibit='&& fail=1'                                           \
 514         exclude='(returns_|stat|kill|test |EGREP|grep|compare|2> *[^/])' \
 515         halt='&& fail=1 detected. Please use: returns_ 1 ... || fail=1' \
 516         in_vc_files='^tests/'                                           \
 517           $(_sc_search_regexp)
 518
 519 # Ensure that tests don't use `cmd ... || fail` as that's a noop.
 520 sc_prohibit_or_fail:
 521         @prohibit='\|\| fail$$'                                         \
 522         exclude=':#'                                                    \
 523         halt='|| fail detected. Please use: || fail=1'                  \
 524         in_vc_files='^tests/'                                           \
 525           $(_sc_search_regexp)
 526
 527 # Ensure that env vars are not passed through returns_ as
 528 # that was seen to fail on FreeBSD /bin/sh at least
 529 sc_prohibit_env_returns:
 530         @prohibit='=[^ ]* returns_ '                                    \
 531         exclude='_ returns_ '                                           \
 532         halt='Passing env vars to returns_ is non portable'             \
 533         in_vc_files='^tests/'                                           \
 534           $(_sc_search_regexp)
 535
 536 # The mode part of a setfacl -m option argument must be three bytes long.
 537 # I.e., an argument of user:bin:rw or user:bin:r will make Solaris 10's
 538 # setfacl reject it with: "Unrecognized character found in mode field".
 539 # Use hyphens to give it a length of 3: "...:rw-" or "...:r--".
 540 sc_prohibit_short_facl_mode_spec:
 541         @prohibit='$(begword)setfacl .*-m.*:.*:[rwx-]{1,2} '            \
 542         halt='setfacl mode string length < 3; extend with hyphen(s)'    \
 543           $(_sc_search_regexp)
 544
 545 # Ensure that "stdio--.h" is used where appropriate.
 546 sc_require_stdio_safer:
 547         @if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then    \
 548           files=$$(grep -El '$(begword)freopen ?\(' $$($(VC_LIST_EXCEPT)\
 549               | grep '\.[ch]$$'));                                      \
 550           test -n "$$files" && grep -LE 'include "stdio--.h"' $$files   \
 551               | grep . &&                                               \
 552           { echo '$(ME): the above files should use "stdio--.h"'        \
 553                 1>&2; exit 1; } || :;                                   \
 554         else :;                                                         \
 555         fi
 556
 557 # Ensure that "stdlib--.h" is used where appropriate.
 558 sc_require_stdlib_safer:
 559         @if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then    \
 560           files=$$(grep -El '$(begword)mkstemp ?\(' $$($(VC_LIST_EXCEPT)\
 561               | grep '\.[ch]$$'));                                      \
 562           test -n "$$files" && grep -LE 'include "stdlib--.h"' $$files  \
 563               | grep . &&                                               \
 564           { echo '$(ME): the above files should use "stdlib--.h"'       \
 565                 1>&2; exit 1; } || :;                                   \
 566         else :;                                                         \
 567         fi
 568
 569 sc_prohibit_perl_hash_quotes:
 570         @prohibit="\{'[A-Z_]+' *[=}]"                                   \
 571         halt="in Perl code, write \$$hash{KEY}, not \$$hash{'K''EY'}"   \
 572           $(_sc_search_regexp)
 573
 574 # Prefer xnanosleep over other less-precise sleep methods
 575 sc_prohibit_sleep:
 576         @prohibit='$(begword)(nano|u)?sleep \('                         \
 577         halt='prefer xnanosleep over other sleep interfaces'            \
 578           $(_sc_search_regexp)
 579
 580 # Use print_ver_ (from init.cfg), not open-coded $VERBOSE check.
 581 sc_prohibit_verbose_version:
 582         @prohibit='test "\$$VERBOSE" = yes && .* --version'             \
 583         halt='use the print_ver_ function instead...'                   \
 584           $(_sc_search_regexp)
 585
 586 # Enforce print_ver_ tracking of dependencies
 587 # Each coreutils specific program a test requires
 588 # should be tagged by calling through env(1).
 589 sc_env_test_dependencies:
 590         @cd $(top_srcdir) && GIT_PAGER= git grep -E \
 591             "env ($$(build-aux/gen-lists-of-programs.sh --list-progs | \
 592                 grep -vF '[' |paste -d'|' -s))" tests | \
 593             sed "s/\([^:]\):.*env \([^)' ]*\).*/\1 \2/" | uniq | \
 594             while read test prog; do \
 595               printf '%s' $$test | grep '\.pl$$' >/dev/null && continue; \
 596               grep "print_ver_.* $$prog" $$test >/dev/null \
 597                 || echo $$test should call: print_ver_ $$prog; \
 598             done | grep . && exit 1 || :
 599
 600 # Use framework_failure_, not the old name without the trailing underscore.
 601 sc_prohibit_framework_failure:
 602         @prohibit='$(begword)framework_''failure$(endword)'             \
 603         halt='use framework_failure_ instead'                           \
 604           $(_sc_search_regexp)
 605
 606 # Prohibit the use of `...` in tests/.  Use $(...) instead.
 607 sc_prohibit_test_backticks:
 608         @prohibit='`' in_vc_files='^tests/'                             \
 609         halt='use $$(...), not `...` in tests/'                         \
 610           $(_sc_search_regexp)
 611
 612 # Ensure that compare is used to check empty files
 613 # so that the unexpected contents are displayed
 614 sc_prohibit_test_empty:
 615         @prohibit='test -s.*&&' in_vc_files='^tests/'                   \
 616         halt='use `compare /dev/null ...`, not `test -s ...` in tests/' \
 617           $(_sc_search_regexp)
 618
 619 # Programs like sort, ls, expr use PROG_FAILURE in place of EXIT_FAILURE.
 620 # Others, use the EXIT_CANCELED, EXIT_ENOENT, etc. macros defined in system.h.
 621 # In those programs, ensure that EXIT_FAILURE is not used by mistake.
 622 sc_some_programs_must_avoid_exit_failure:
 623         @cd $(srcdir)                                                   \
 624         && grep -nw EXIT_FAILURE                                        \
 625             $$(git grep -El '[^T]_FAILURE|EXIT_CANCELED' src/)          \
 626           | grep -v '^src/system\.h:'                                   \
 627           | grep -vE '= EXIT_FAILURE|return .* \?' | grep .             \
 628             && { echo '$(ME): do not use EXIT_FAILURE in the above'     \
 629                   1>&2; exit 1; } || :
 630
 631 # Ensure that tests call the get_min_ulimit_v_ function if using ulimit -v
 632 sc_prohibit_test_ulimit_without_require_:
 633         @(git -C $(srcdir) grep -l get_min_ulimit_v_ tests;             \
 634           git -C $(srcdir) grep -l 'ulimit -v' tests)                   \
 635           | sort | uniq -u | grep . && { echo "$(ME): the above test(s)"\
 636           " should match get_min_ulimit_v_ with ulimit -v" 1>&2; exit 1; } || :
 637
 638 # Ensure that tests call the cleanup_ function if using background processes
 639 sc_prohibit_test_background_without_cleanup_:
 640         @(git -C $(srcdir) grep -El '( &$$|&[^&]*=\$$!)' tests;         \
 641           git -C $(srcdir) grep -l 'cleanup_()' tests | sed p)          \
 642           | sort | uniq -u | grep . && { echo "$(ME): the above test(s)"\
 643           " should use cleanup_ for background processes" 1>&2; exit 1; } || :
 644
 645 # Ensure that tests call the print_ver_ function for programs which are
 646 # actually used in that test.
 647 sc_prohibit_test_calls_print_ver_with_irrelevant_argument:
 648         @git -C $(srcdir) grep -w print_ver_ tests                      \
 649           | sed 's#:print_ver_##'                                       \
 650           | { fail=0;                                                   \
 651               while read file name; do                                  \
 652                 for i in $$name; do                                     \
 653                   case "$$i" in install) i=ginstall;; esac;             \
 654                   grep -w "$$i" $$file|grep -vw print_ver_|grep . >/dev/null \
 655                     || { fail=1;                                        \
 656                          echo "*** Test: $$file, offending: $$i." 1>&2; };\
 657                 done;                                                   \
 658               done;                                                     \
 659               test $$fail = 0 || exit 1;                                \
 660             } || { echo "$(ME): the above test(s) call print_ver_ for"  \
 661                     "program(s) they don't use" 1>&2; exit 1; }
 662
 663 # Exempt the contents of any usage function from the following.
 664 _continued_string_col_1 = \
 665 s/^usage .*?\n}//ms;/\\\n\w/ and print ("$$ARGV\n"),$$e=1;END{$$e||=0;exit $$e}
 666 # Ding any source file that has a continued string with an alphabetic in the
 667 # first column of the following line.  We prohibit them because they usually
 668 # trigger false positives in tools that try to map an arbitrary line number
 669 # to the enclosing function name.  Of course, very many strings do precisely
 670 # this, *when they are part of the usage function*.  That is why we exempt
 671 # the contents of any function named "usage".
 672 sc_prohibit_continued_string_alpha_in_column_1:
 673         @perl -0777 -ne '$(_continued_string_col_1)' \
 674             $$($(VC_LIST_EXCEPT) | grep '\.[ch]$$') \
 675           || { echo '$(ME): continued string with word in first column' \
 676                 1>&2; exit 1; } || :
 677 # Use this to list offending lines:
 678 # git ls-files |grep '\.[ch]$' | xargs \
 679 #   perl -n -0777 -e 's/^usage.*?\n}//ms;/\\\n\w/ and print "$ARGV\n"' \
 680 #     | xargs grep -A1 '\\$'|grep '\.[ch][:-][_a-zA-Z]'
 681
 682
 683 ###########################################################
 684 _p0 = \([^"'/]\|"\([^\"]\|[\].\)*"\|'\([^\']\|[\].\)*'
 685 _pre = $(_p0)\|[/][^"'/*]\|[/]"\([^\"]\|[\].\)*"\|[/]'\([^\']\|[\].\)*'\)*
 686 _pre_anchored = ^\($(_pre)\)
 687 _comment_and_close = [^*]\|[*][^/*]\)*[*][*]*/
 688 # help font-lock mode: '
 689
 690 # A sed expression that removes ANSI C and ISO C99 comments.
 691 # Derived from the one in GNU gettext's 'moopp' preprocessor.
 692 _sed_remove_comments =                                  \
 693 /[/][/*]/{                                              \
 694   ta;                                                   \
 695   :a;                                                   \
 696   s,$(_pre_anchored)//.*,\1,;                           \
 697   te;                                                   \
 698   s,$(_pre_anchored)/[*]\($(_comment_and_close),\1 ,;   \
 699   ta;                                                   \
 700   /^$(_pre)[/][*]/{                                     \
 701     s,$(_pre_anchored)/[*].*,\1 ,;                      \
 702     tu;                                                 \
 703     :u;                                                 \
 704     n;                                                  \
 705     s,^\($(_comment_and_close),,;                       \
 706     tv;                                                 \
 707     s,^.*$$,,;                                          \
 708     bu;                                                 \
 709     :v;                                                 \
 710   };                                                    \
 711   :e;                                                   \
 712 }
 713 # Quote all single quotes.
 714 _sed_rm_comments_q = $(subst ','\'',$(_sed_remove_comments))
 715 # help font-lock mode: '
 716
 717 _space_before_paren_exempt =? \\n\\$$
 718 _space_before_paren_exempt = \
 719   (^ *\#|\\n\\$$|%s\(to %s|(date|group|character)\(s\))
 720 # Ensure that there is a space before each open parenthesis in C code.
 721 sc_space_before_open_paren:
 722         @if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then    \
 723           fail=0;                                                       \
 724           for c in $$($(VC_LIST_EXCEPT) | grep '\.[ch]$$'); do          \
 725             sed '$(_sed_rm_comments_q)' $$c 2>/dev/null                 \
 726               | grep -i '[[:alnum:]]('                                  \
 727               | grep -vE '$(_space_before_paren_exempt)'                \
 728               | grep . && { fail=1; echo "*** $$c"; };                  \
 729           done;                                                         \
 730           test $$fail = 1 &&                                            \
 731             { echo '$(ME): the above files lack a space-before-open-paren' \
 732                 1>&2; exit 1; } || :;                                   \
 733         else :;                                                         \
 734         fi
 735
 736 # Similar to the gnulib maint.mk rule for sc_prohibit_strcmp
 737 # Use STREQ_LEN or STRPREFIX rather than comparing strncmp == 0, or != 0.
 738 sc_prohibit_strncmp:
 739         @prohibit='^[^#].*str''ncmp *\('                                \
 740         halt='use STREQ_LEN or STRPREFIX instead of str''ncmp'          \
 741           $(_sc_search_regexp)
 742
 743 # Enforce recommended preprocessor indentation style.
 744 sc_preprocessor_indentation:
 745         @if cppi --version >/dev/null 2>&1; then                        \
 746           $(VC_LIST_EXCEPT) | grep '\.[ch]$$' | xargs cppi -a -c        \
 747             || { echo '$(ME): incorrect preprocessor indentation' 1>&2; \
 748                 exit 1; };                                              \
 749         else                                                            \
 750           echo '$(ME): skipping test $@: cppi not installed' 1>&2;      \
 751         fi
 752
 753 # THANKS.in is a list of name/email pairs for people who are mentioned in
 754 # commit logs (and generated ChangeLog), but who are not also listed as an
 755 # author of a commit.  Name/email pairs of commit authors are automatically
 756 # extracted from the repository.  As a very minor factorization, when
 757 # someone who was initially listed only in THANKS.in later authors a commit,
 758 # this rule detects that their pair may now be removed from THANKS.in.
 759 sc_THANKS_in_duplicates:
 760         @{ git -C $(srcdir) log --pretty=format:%aN | sort -u;          \
 761             cut -b-36 $(srcdir)/THANKS.in                               \
 762               | sed '/^$$/,/^$$/!d;/^$$/d;s/  *$$//'; }                 \
 763           | sort | uniq -d | grep .                                     \
 764             && { echo '$(ME): remove the above names from THANKS.in'    \
 765                   1>&2; exit 1; } || :
 766
 767 # Ensure the contributor list stays sorted.  However, if the system's
 768 # en_US.UTF-8 locale data is erroneous, give a diagnostic and skip
 769 # this test.  This affects OS X, up to at least 10.11.6.
 770 # Use our sort as other implementations may result in a different order.
 771 sc_THANKS_in_sorted:
 772         @printf 'a\n.b\n'|LC_ALL=en_US.UTF-8 src/sort -c 2> /dev/null   \
 773           && {                                                          \
 774             sed '/^$$/,/^$$/!d;/^$$/d' $(srcdir)/THANKS.in > $@.1 &&    \
 775             LC_ALL=en_US.UTF-8 src/sort -f -k1,1 $@.1 > $@.2 &&         \
 776             diff -u $@.1 $@.2; diff=$$?;                                \
 777             rm -f $@.1 $@.2;                                            \
 778             test "$$diff" = 0                                           \
 779               || { echo '$(ME): THANKS.in is unsorted' 1>&2; exit 1; }; \
 780             }                                                           \
 781           || { echo '$(ME): this system has erroneous locale data;'     \
 782                     'skipping $@' 1>&2; }
 783
 784 # Look for developer diagnostics that are marked for translation.
 785 # This won't find any for which devmsg's format string is on a separate line.
 786 sc_marked_devdiagnostics:
 787         @prohibit='$(begword)devmsg *\(.*_\('                           \
 788         halt='found marked developer diagnostic(s)'                     \
 789           $(_sc_search_regexp)
 790
 791 # Ensure we keep hex constants as 4 or 8 bytes for consistency
 792 # and so that make src/fs-magic-compare works consistently
 793 sc_fs-magic-compare:
 794         @sed -n 's|.*/\* \(0x[0-9A-Fa-f]\{1,\}\) .*\*/|\1|p'            \
 795           $(srcdir)/src/stat.c | grep -Ev '^0x([0-9A-F]{4}){1,2}$$'     \
 796             && { echo '$(ME): Constants in src/stat.c should be 4 or 8' \
 797                       'upper-case chars' 1>&2; exit 1; } || :
 798
 799 # Ensure gnulib generated files are ignored
 800 # TODO: Perhaps augment gnulib-tool to do this in lib/.gitignore?
 801 sc_gitignore_missing:
 802         @{ sed -n '/^\/lib\/.*\.h$$/{p;p}' $(srcdir)/.gitignore;        \
 803             find lib -name '*.in*' ! -name '*~' ! -name 'sys_*' |       \
 804               sed 's|^|/|; s|_\(.*in\.h\)|/\1|; s/\.in//'; } |          \
 805               sort | uniq -u | grep . && { echo '$(ME): Add above'      \
 806                 'entries to .gitignore' >&2; exit 1; } || :
 807
 808 # Flag redundant entries in .gitignore
 809 # Disabled for now as too aggressive flagging
 810 # entries like /lib/arg-nonnull.h
 811 #sc_gitignore_redundant:
 812 #       @{ grep ^/lib $(srcdir)/.gitignore;                             \
 813 #          sed 's|^|/lib|' $(srcdir)/lib/.gitignore; } |                \
 814 #           sort | uniq -d | grep . && { echo '$(ME): Remove above'     \
 815 #             'entries from .gitignore' >&2; exit 1; } || :
 816
 817 sc_prohibit-form-feed:
 818         @prohibit=$$'\f' \
 819         in_vc_files='\.[chly]$$' \
 820         halt='Form Feed (^L) detected' \
 821           $(_sc_search_regexp)
 822
 823 # Override the default Cc: used in generating an announcement.
 824 announcement_Cc_ = $(translation_project_), \
 825   coreutils@gnu.org, coreutils-announce@gnu.org
 826
 827 -include $(srcdir)/dist-check.mk
 828
 829 update-copyright-env = \
 830   UPDATE_COPYRIGHT_FORCE=1 \
 831   UPDATE_COPYRIGHT_USE_INTERVALS=2 \
 832   UPDATE_COPYRIGHT_MAX_LINE_LENGTH=79
 833
 834 # List syntax-check exemptions.
 835 exclude_file_name_regexp--sc_space_tab = \
 836   ^(tests/pr/|tests/misc/nl\.sh$$|gl/.*\.diff$$|man/help2man$$)
 837 exclude_file_name_regexp--sc_bindtextdomain = \
 838   ^(gl/.*|lib/euidaccess-stat|src/make-prime-list|src/cksum)\.c$$
 839 exclude_file_name_regexp--sc_trailing_blank = \
 840   ^(tests/pr/|gl/.*\.diff$$|man/help2man)
 841 exclude_file_name_regexp--sc_system_h_headers = \
 842   ^src/((system|copy|chown-core|find-mount-point)\.h|make-prime-list\.c)$$
 843
 844 _src := (false|lbracket|chown-(chgrp|chown)
 845 _src := $(_src)|ls-(dir|ls|vdir)|tac-pipe|uname-(arch|uname))
 846 _gl_src = (xdecto.max|cl-strtold)
 847 exclude_file_name_regexp--sc_require_config_h_first = \
 848   (^lib/buffer-lcm\.c|gl/lib/$(_gl_src)\.c|src/$(_src)\.c)$$
 849 exclude_file_name_regexp--sc_require_config_h = \
 850   $(exclude_file_name_regexp--sc_require_config_h_first)
 851
 852 exclude_file_name_regexp--sc_po_check = ^(gl/|man/help2man)
 853 exclude_file_name_regexp--sc_prohibit_always-defined_macros = \
 854   ^src/(seq|remove)\.c$$
 855 exclude_file_name_regexp--sc_prohibit_empty_lines_at_EOF = ^tests/pr/
 856 exclude_file_name_regexp--sc_program_name = \
 857   ^(gl/.*|lib/euidaccess-stat|src/make-prime-list)\.c$$
 858 exclude_file_name_regexp--sc_file_system = \
 859   NEWS|^(init\.cfg|src/df\.c|tests/df/df-P\.sh|tests/df/df-output\.sh)$$
 860 exclude_file_name_regexp--sc_prohibit_always_true_header_tests = \
 861   ^m4/stat-prog\.m4$$
 862 exclude_file_name_regexp--sc_prohibit_fail_0 = \
 863   (^.*/git-hooks/commit-msg|^tests/init\.sh|Makefile\.am|\.mk|.*\.texi)$$
 864 exclude_file_name_regexp--sc_prohibit_test_minus_ao = doc/.*\.texi$$
 865 exclude_file_name_regexp--sc_prohibit_atoi_atof = ^lib/euidaccess-stat\.c$$
 866
 867 # longlong.h is maintained elsewhere.
 868 _ll = ^src/longlong\.h$$
 869 exclude_file_name_regexp--sc_useless_cpp_parens = $(_ll)
 870 exclude_file_name_regexp--sc_space_before_open_paren = $(_ll)
 871
 872 tbi_1 = ^tests/pr/|(\.mk|^man/help2man)$$
 873 tbi_2 = ^scripts/git-hooks/(pre-commit|pre-applypatch|applypatch-msg)$$
 874 tbi_3 = (GNU)?[Mm]akefile(\.am)?$$|$(_ll)
 875 exclude_file_name_regexp--sc_prohibit_tab_based_indentation = \
 876   $(tbi_1)|$(tbi_2)|$(tbi_3)
 877
 878 exclude_file_name_regexp--sc_preprocessor_indentation = \
 879   ^(gl/lib/rand-isaac\.[ch]|gl/tests/test-rand-isaac\.c)$$|$(_ll)
 880 exclude_file_name_regexp--sc_prohibit_stat_st_blocks = \
 881   ^(src/system\.h|tests/du/2g\.sh)$$
 882
 883 exclude_file_name_regexp--sc_prohibit_continued_string_alpha_in_column_1 = \
 884   ^src/(system\.h|od\.c|printf\.c|getlimits\.c)$$
 885
 886 _cksum = ^tests/cksum/cksum-base64\.pl$$
 887 exclude_file_name_regexp--sc_prohibit_test_backticks = \
 888   ^tests/(local\.mk|(init|misc/stdbuf|factor/create-test)\.sh)$$|$(_cksum)
 889
 890 # Exempt test.c, since it's nominally shared, and relatively static.
 891 exclude_file_name_regexp--sc_prohibit_operator_at_end_of_line = \
 892   ^src/(ptx|test|head)\.c$$
 893
 894 exclude_file_name_regexp--sc_error_message_uppercase = ^src/factor\.c$$
 895 exclude_file_name_regexp--sc_prohibit_atoi_atof = ^src/make-prime-list\.c$$
 896
 897 # Exception here as we don't want __attribute elided on non GCC
 898 exclude_file_name_regexp--sc_prohibit-gl-attributes = ^src/libstdbuf\.c$$
 899
 900 exclude_file_name_regexp--sc_prohibit_uppercase_id_est = \.diff$$
 901 exclude_file_name_regexp--sc_ensure_dblspace_after_dot_before_id_est = \.diff$$
 902 exclude_file_name_regexp--sc_ensure_comma_after_id_est = \.diff|$(_ll)$$
 903 exclude_file_name_regexp--sc_long_lines = \.diff$$|$(_ll)|$(_cksum)
 904
 905 # `grep . -q` is not exactly equivalent to `grep . >/dev/null`
 906 # and this difference is significant in the NEWS description
 907 exclude_file_name_regexp--sc_unportable_grep_q = NEWS
 908
 909 # Augment AM_CFLAGS to include our per-directory options:
 910 AM_CFLAGS += $($(@D)_CFLAGS)
 911
 912 src_CFLAGS = $(WARN_CFLAGS)
 913 lib_CFLAGS = $(GNULIB_WARN_CFLAGS)
 914 gnulib-tests_CFLAGS = $(GNULIB_TEST_WARN_CFLAGS)
 915
 916 # Configuration to make the tight-scope syntax-check rule work with
 917 # non-recursive make.
 918 # Note _gl_TS_headers use _single line_ extern function declarations,
 919 # while *_SOURCES use the _two line_ form.
 920 export _gl_TS_headers = $(noinst_HEADERS)
 921 # Add exceptions for --enable-single-binary renamed functions.
 922 _gl_TS_unmarked_extern_functions = main usage
 923 _gl_TS_unmarked_extern_functions += single_binary_main_.* _usage_.*
 924 # Headers to search for single line extern _data_ declarations.
 925 _gl_TS_other_headers = $(srcdir)/src/*.h src/*.h
 926 # Tell the tight_scope rule about an exceptional "extern" variable.
 927 # Normally, the rule would detect its declaration, but that uses a
 928 # different name, __clz_tab.
 929 _gl_TS_unmarked_extern_vars = factor_clz_tab
 930 # Avoid tight_scope rule stating these should be static
 931 # as there is no way to achieve that with the way these are defined.
 932 _gl_TS_unmarked_extern_vars += ptr_MD5_.*
 933 # Other tight_scope settings
 934 _gl_TS_dir = .
 935 _gl_TS_obj_files = src/*.$(OBJEXT)