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/.*$$
  26
  27 # Tests not to run as part of "make distcheck".
  28 local-checks-to-skip = \
  29   sc_indent
  30
  31 # Tools used to bootstrap this package, used for "announcement".
  32 bootstrap-tools = autoconf,automake,gnulib,bison
  33
  34 # Now that we have better tests, make this the default.
  35 export VERBOSE = yes
  36
  37 # Comparing tarball sizes compressed using different xz presets, we see that
  38 # an -8e-compressed tarball is only 9KiB larger than the -9e-compressed one.
  39 # Using -8e is preferred, since that lets the decompression process use half
  40 # the memory (32MiB rather than 64MiB).
  41 # $ for i in {7,8,9}{e,}; do \
  42 #     (n=$(xz -$i < coreutils-8.15*.tar|wc -c);echo $n $i) & done |sort -nr
  43 # 5129388 7
  44 # 5036524 7e
  45 # 5017476 8
  46 # 5010604 9
  47 # 4923016 8e
  48 # 4914152 9e
  49 export XZ_OPT = -8e
  50
  51 old_NEWS_hash = e4007bb11862c8509c974bff2cccdeac
  52
  53 # Add an exemption for sc_makefile_at_at_check.
  54 _makefile_at_at_check_exceptions = \
  55   ' && !/MAKEINFO/ && !/^cu_install_prog/ && !/dynamic-dep/'
  56
  57 # Our help-version script is in a slightly different location.
  58 _hv_file ?= $(srcdir)/tests/misc/help-version
  59
  60 world:
  61         ./bootstrap && \
  62         ./configure --quiet && \
  63         $(MAKE) $(AM_MAKEFLAGS) -j $$(nproc 2>/dev/null || echo 1)
  64
  65 # Ensure that the list of O_ symbols used to compute O_FULLBLOCK is complete.
  66 dd = $(srcdir)/src/dd.c
  67 sc_dd_O_FLAGS:
  68         @rm -f $@.1 $@.2
  69         @{ echo O_FULLBLOCK; echo O_NOCACHE;                            \
  70           perl -nle '/^ +\| (O_\w*)$$/ and print $$1' $(dd); } | sort > $@.1
  71         @{ echo O_NOFOLLOW; perl -nle '/{"[a-z]+",\s*(O_\w+)},/ and print $$1' \
  72           $(dd); } | sort > $@.2
  73         @diff -u $@.1 $@.2; diff=$$?;                                   \
  74         rm -f $@.1 $@.2;                                                \
  75         test "$$diff" = 0                                               \
  76           || { echo '$(ME): $(dd) has inconsistent O_ flag lists'>&2;   \
  77                exit 1; }
  78
  79 # Ensure that dd's definition of LONGEST_SYMBOL stays in sync
  80 # with the strings from the two affected variables.
  81 dd_c = $(srcdir)/src/dd.c
  82 sc_dd_max_sym_length:
  83 ifneq ($(wildcard $(dd_c)),)
  84         @len=$$( (sed -n '/conversions\[] =$$/,/^};/p' $(dd_c);\
  85                  sed -n '/flags\[] =$$/,/^};/p' $(dd_c) )       \
  86                 |sed -n '/"/s/^[^"]*"\([^"]*\)".*/\1/p'| wc -L);\
  87         max=$$(sed -n '/^#define LONGEST_SYMBOL /s///p' $(dd_c) \
  88               |tr -d '"' | wc -L);              \
  89         if test "$$len" = "$$max"; then :; else                 \
  90           echo 'dd.c: LONGEST_SYMBOL is not longest' 1>&2;      \
  91           exit 1;                                               \
  92         fi
  93 endif
  94
  95 # Many m4 macros names once began with 'jm_'.
  96 # On 2004-04-13, they were all changed to start with gl_ instead.
  97 # Make sure that none are inadvertently reintroduced.
  98 sc_prohibit_jm_in_m4:
  99         @grep -nE 'jm_[A-Z]'                                            \
 100                 $$($(VC_LIST) m4 |grep '\.m4$$'; echo /dev/null) &&     \
 101             { echo '$(ME): do not use jm_ in m4 macro names'            \
 102               1>&2; exit 1; } || :
 103
 104 # Ensure that each root-requiring test is run via the "check-root" rule.
 105 sc_root_tests:
 106         @t1=sc-root.expected; t2=sc-root.actual;                        \
 107         grep -nl '^ *require_root_$$' `$(VC_LIST) tests` |              \
 108           sed 's|.*/tests/|tests/|' | sort > $$t1;                      \
 109         for t in $(all_root_tests); do echo $$t; done | sort > $$t2;    \
 110         st=0; diff -u $$t1 $$t2 || st=1;                                \
 111         rm -f $$t1 $$t2;                                                \
 112         exit $$st
 113
 114 # Ensure that all version-controlled test cases are listed in $(all_tests).
 115 sc_tests_list_consistency:
 116         @bs="\\";                                                       \
 117         test_extensions_rx=`echo $(TEST_EXTENSIONS)                     \
 118           | sed -e "s/ /|/g" -e "s/$$bs./$$bs$$bs./g"`;                 \
 119         {                                                               \
 120           for t in $(all_tests); do echo $$t; done;                     \
 121           cd $(top_srcdir);                                             \
 122           $(SHELL) build-aux/vc-list-files tests                        \
 123             | grep -Ev '^tests/(factor/(run|create-test)|init)\.sh$$'   \
 124             | grep -E "($$test_extensions_rx)$$";                       \
 125         } | sort | uniq -u | grep . && exit 1; :
 126
 127 # Ensure that all version-controlled test scripts are executable.
 128 sc_tests_executable:
 129         @set -o noglob 2>/dev/null || set -f;                              \
 130         cd $(srcdir);                                                      \
 131         find_ext="-name '' "`printf -- "-o -name *%s " $(TEST_EXTENSIONS)`;\
 132         find $(srcdir)/tests/ \( $$find_ext \) \! -perm -u+x -print        \
 133           | { sed "s|^$(srcdir)/||"; git ls-files $(srcdir)/tests/; }      \
 134           | sort | uniq -d                                                 \
 135           | sed -e "s/^/$(ME): Please make test executable: /" | grep .    \
 136             && exit 1; :
 137
 138 # Ensure all gnulib patches apply cleanly
 139 sc_ensure_gl_diffs_apply_cleanly:
 140         @find $(srcdir)/gl/ -name '*.diff' | while read p; do           \
 141           patch --fuzz=0 -f -s -d $(srcdir)/gnulib/ -p1 --dry-run < "$$p" >&2 \
 142             || { echo "$$p" >&2; echo 'To refresh all gl patches run:'  \
 143                  'make refresh-gnulib-patches' >&2; exit 1; }           \
 144         done
 145
 146 # Avoid :>file which doesn't propagate errors
 147 sc_prohibit_colon_redirection:
 148         @cd $(srcdir)/tests && GIT_PAGER= git grep -En ': *>.*\|\|'     \
 149           && { echo '$(ME): '"The leading colon in :> will hide errors" >&2; \
 150                exit 1; }  \
 151           || :
 152
 153 # Ensure emit_mandatory_arg_note() is called if required
 154 sc_ensure_emit_mandatory_arg_note:
 155         @cd $(srcdir)/src && GIT_PAGER= git \
 156           grep -l -- '^ *-[^-].*--.*[^[]=' *.c \
 157           | xargs grep -L emit_mandatory_arg_note | grep . \
 158           && { echo '$(ME): '"emit_mandatory_arg_note() missing" 1>&2; \
 159                exit 1; } || :
 160
 161 # Create a list of regular expressions matching the names
 162 # of files included from system.h.  Exclude a couple.
 163 .re-list:
 164         @sed -n '/^# *include /s///p' $(srcdir)/src/system.h \
 165           | grep -Ev 'sys/(param|file)\.h' \
 166           | sed 's/ .*//;;s/^["<]/^# *include [<"]/;s/\.h[">]$$/\\.h[">]/' \
 167           > $@-t
 168         @mv $@-t $@
 169
 170 define gl_trap_
 171   Exit () { set +e; (exit $$1); exit $$1; };                            \
 172   for sig in 1 2 3 13 15; do                                            \
 173     eval "trap 'Exit $$(expr $$sig + 128)' $$sig";                      \
 174   done
 175 endef
 176
 177 # Files in src/ should not include directly any of
 178 # the headers already included via system.h.
 179 sc_system_h_headers: .re-list
 180         @if test -f $(srcdir)/src/system.h; then                        \
 181           trap 'rc=$$?; rm -f .re-list; exit $$rc' 0;                   \
 182           $(gl_trap_);                                                  \
 183           grep -nE -f .re-list                                          \
 184               $$($(VC_LIST_EXCEPT) | grep -E '^($(srcdir)/)?src/')      \
 185             && { echo '$(ME): the above are already included via system.h'\
 186                   1>&2;  exit 1; } || :;                                \
 187         fi
 188
 189 # Files in src/ should not use '%s' notation in format strings,
 190 # i.e., single quotes around %s (or similar) should be avoided.
 191 sc_prohibit_quotes_notation:
 192         @cd $(srcdir)/src && GIT_PAGER= git grep -n "\".*[\`']%s'.*\"" *.c \
 193           && { echo '$(ME): '"Use quote() to avoid quoted '%s' notation" 1>&2; \
 194                exit 1; }  \
 195           || :
 196
 197 error_fns = (error|diagnose)
 198
 199 # Files in src/ should quote all strings in error() output, so that
 200 # unexpected input chars like \r etc. don't corrupt the error.
 201 # In edge cases this can be avoided by putting the format string
 202 # on a separate line to the arguments, or the arguments in parenthesis.
 203 sc_error_quotes:
 204         @cd $(srcdir)/src \
 205           && GIT_PAGER= git grep -E -n '$(error_fns) *\(.*%s.*, [^(]*\);$$' \
 206           *.c | grep -v ', q' \
 207           && { echo '$(ME): '"Use quote() for error string arguments" 1>&2; \
 208                exit 1; }  \
 209           || :
 210
 211 # Files in src/ should quote all file names in error() output
 212 # using quotef(), to provide quoting only when necessary,
 213 # but also provide better support for copy and paste when used.
 214 sc_error_shell_quotes:
 215         @cd $(srcdir)/src && \
 216           { GIT_PAGER= git grep -E \
 217             '$(error_fns) \(.*%s[:"], .*(name|file)[^"]*\);$$' *.c; \
 218             GIT_PAGER= git grep -E \
 219             ' quote[ _].*file' *.c; } \
 220           | grep -Ev '(quotef|q[^ ]*name)' \
 221           && { echo '$(ME): '"Use quotef() for colon delimited names" 1>&2; \
 222                exit 1; }  \
 223           || :
 224
 225 # Files in src/ should quote all file names in error() output
 226 # using quoteaf() when the name is separated with spaces,
 227 # to distinguish the file name at issue and
 228 # to provide better support for copy and paste.
 229 sc_error_shell_always_quotes:
 230         @cd $(srcdir)/src && GIT_PAGER= git grep -E \
 231             '$(error_fns) \(.*[^:] %s[ "].*, .*(name|file)[^"]*\);$$' \
 232             *.c | grep -Ev '(quoteaf|q[^ ]*name)' \
 233           && { echo '$(ME): '"Use quoteaf() for space delimited names" 1>&2; \
 234                exit 1; }  \
 235           || :
 236         @cd $(srcdir)/src && GIT_PAGER= git grep -E -A1 \
 237             '$(error_fns) \([^%]*[^:] %s[ "]' *.c | grep 'quotef' \
 238           && { echo '$(ME): '"Use quoteaf() for space delimited names" 1>&2; \
 239                exit 1; }  \
 240           || :
 241
 242 # Avoid unstyled quoting to internal slots and thus destined for diagnostics
 243 # as that can leak unescaped control characters to the output, when using
 244 # the default "literal" quoting style.
 245 # Instead use quotef(), or quoteaf() or in edge cases quotearg_n_style_colon().
 246 # A more general PCRE would be @prohibit='quotearg_.*(?!(style|buffer))'
 247 sc_prohibit-quotearg:
 248         @prohibit='quotearg(_n)?(|_colon|_char|_mem) ' \
 249         in_vc_files='\.c$$' \
 250         halt='Unstyled diagnostic quoting detected' \
 251           $(_sc_search_regexp)
 252
 253 sc_prohibit-skip:
 254         @prohibit='\|\| skip ' \
 255         halt='Use skip_ not skip' \
 256           $(_sc_search_regexp)
 257
 258 sc_sun_os_names:
 259         @grep -nEi \
 260             'solaris[^[:alnum:]]*2\.(7|8|9|[1-9][0-9])|sunos[^[:alnum:]][6-9]' \
 261             $$($(VC_LIST_EXCEPT)) &&                                    \
 262           { echo '$(ME): found misuse of Sun OS version numbers' 1>&2;  \
 263             exit 1; } || :
 264
 265 # Ensure that the list of programs and author names is accurate.
 266 # We need a UTF8 locale.  If a lack of locale support or a missing
 267 # translation inhibits printing of UTF-8 names, just skip this test.
 268 au_dotdot = authors-dotdot
 269 au_actual = authors-actual
 270 sc_check-AUTHORS: $(all_programs)
 271         @locale=en_US.UTF-8;                            \
 272         LC_ALL=$$locale ./src/factor --version          \
 273             | grep ' Torbjorn ' > /dev/null             \
 274           && { echo "$@: skipping this check"; exit 0; }; \
 275         rm -f $(au_actual) $(au_dotdot);                \
 276         for i in `ls $(all_programs)                    \
 277             | sed -e 's,^src/,,' -e 's,$(EXEEXT)$$,,'   \
 278             | sed /libstdbuf/d                          \
 279             | $(ASSORT) -u`; do                         \
 280           test "$$i" = '[' && continue;                 \
 281           exe=$$i;                                      \
 282           if test "$$i" = install; then                 \
 283             exe=ginstall;                               \
 284           elif test "$$i" = test; then                  \
 285             exe='[';                                    \
 286           fi;                                           \
 287           LC_ALL=$$locale ./src/$$exe --version         \
 288             | perl -0 -p -e 's/,\n/, /gm'               \
 289             | sed -n -e '/Written by /{ s//'"$$i"': /;' \
 290                   -e 's/,* and /, /; s/\.$$//; p; }';   \
 291         done > $(au_actual) &&                          \
 292         sed -n '/^[^ ][^ ]*:/p' $(srcdir)/AUTHORS > $(au_dotdot) \
 293           && diff $(au_actual) $(au_dotdot) \
 294           && rm -f $(au_actual) $(au_dotdot)
 295
 296 # Ensure the alternative __attribute (keyword) form isn't used as
 297 # that form is not elided where required.  Also ensure that we don't
 298 # directly use attributes already defined by gnulib.
 299 # TODO: move the check for _GL... attributes to gnulib.
 300 sc_prohibit-gl-attributes:
 301         @prohibit='__attribute |__(unused|pure|const)__'        \
 302         in_vc_files='\.[ch]$$'                                  \
 303         halt='Use _GL... attribute macros'                      \
 304           $(_sc_search_regexp)
 305
 306 # Prefer the const declaration form, with const following the type
 307 sc_prohibit-const-char:
 308         @prohibit='const char \*'                               \
 309         in_vc_files='\.[ch]$$'                                  \
 310         halt='Use char const *, not const char *'               \
 311           $(_sc_search_regexp)
 312
 313 # Look for lines longer than 80 characters, except omit:
 314 # - urls
 315 # - the fdl.texi file copied from gnulib,
 316 # - the help2man script copied from upstream,
 317 # - tests involving long checksum lines, and
 318 # - the 'pr' test cases.
 319 FILTER_LONG_LINES =                                             \
 320   \|^[^:]*NEWS:.*https\{,1\}://| d;                                     \
 321   \|^[^:]*doc/fdl.texi:| d;                                     \
 322   \|^[^:]*man/help2man:| d;                                     \
 323   \|^[^:]*tests/cksum/sha[0-9]*sum.*\.pl[-:]| d;                        \
 324   \|^[^:]*tests/pr/|{ \|^[^:]*tests/pr/pr-tests:| !d; };
 325 sc_long_lines:
 326         @wc -L /dev/null >/dev/null 2>/dev/null                         \
 327            || { echo "$@: skipping: wc -L not supported"; exit 0; };    \
 328         sed -r 1q /dev/null 2>/dev/null                                 \
 329            || { echo "$@: skipping: sed -r not supported"; exit 0; };   \
 330         files=$$($(VC_LIST_EXCEPT) | xargs wc -L | sed -rn '/ total$$/d;\
 331                   s/^ *(8[1-9]|9[0-9]|[0-9]{3,}) //p');                 \
 332         halt='line(s) with more than 80 characters; reindent';          \
 333         for file in $$files; do                                         \
 334           expand $$file | grep -nE '^.{80}.' |                          \
 335           sed -e "s|^|$$file:|" -e '$(FILTER_LONG_LINES)';              \
 336         done | grep . && { msg="$$halt" $(_sc_say_and_exit) } || :
 337
 338 # Option descriptions should not start with a capital letter.
 339 # One could grep source directly as follows:
 340 # grep -E " {2,6}-.*[^.]  [A-Z][a-z]" $$($(VC_LIST_EXCEPT) | grep '\.c$$')
 341 # but that would miss descriptions not on the same line as the -option.
 342 sc_option_desc_uppercase: $(ALL_MANS)
 343         @grep '^\\fB\\-' -A1 man/*.1 | LC_ALL=C grep '\.1.[A-Z][a-z]'   \
 344           && { echo 1>&2 '$@: found initial capitals in --help'; exit 1; } || :
 345
 346 # '--' should not be treated as '–' (U+2013 EN DASH) in long option names.
 347 sc_texi_long_option_escaped: doc/coreutils.info
 348         @grep ' –[^ ]' '$<'                                           \
 349           && { echo 1>&2 '$@: found unquoted --long-option'; exit 1; } || :
 350
 351 # Ensure all man/*.[1x] files are present.
 352 sc_man_file_correlation: check-x-vs-1 check-programs-vs-x
 353
 354 # Ensure that for each .x file in the 'man/' subdirectory, there is a
 355 # corresponding .1 file in the definition of $(EXTRA_MANS).
 356 # But since that expansion usually lacks programs like arch and hostname,
 357 # add them here manually.
 358 .PHONY: check-x-vs-1
 359 check-x-vs-1:
 360         @PATH=./src$(PATH_SEPARATOR)$$PATH; export PATH;                \
 361         t=$@-t;                                                         \
 362         (cd $(srcdir)/man && ls -1 *.x)                                 \
 363           | sed 's/\.x$$//' | $(ASSORT) > $$t;                          \
 364         (echo $(patsubst man/%,%,$(ALL_MANS))                           \
 365           | tr -s ' ' '\n' | sed 's/\.1$$//')                           \
 366           | $(ASSORT) -u | diff - $$t || { rm $$t; exit 1; };           \
 367         rm $$t
 368
 369 # Ensure that non-trivial .x files in the 'man/' subdirectory,
 370 # i.e., files exceeding a line count of 20 or a byte count of 1000,
 371 # contain a Copyright notice.
 372 .PHONY: sc_man_check_x_copyright
 373 sc_man_check_x_copyright:
 374         @status=0;                                                      \
 375         cd $(srcdir) && wc -cl man/*.x | head -n-1                      \
 376           | awk '$$1 >= 20 || $$2 >= 1000 {print $$3}'                  \
 377           | xargs grep -L 'Copyright .* Free Software Foundation'       \
 378           | grep .                                                      \
 379           && { echo  1>&2 '$@: exceeding file size/line count limit'    \
 380                   '- please add a copyright note'; status=1; };         \
 381         exit $$status
 382
 383 # Writing a portable rule to generate a manpage like '[.1' would be
 384 # a nightmare, so filter that out.
 385 all-progs-but-lbracket = $(filter-out [,$(patsubst src/%,%,$(all_programs)))
 386
 387 # Ensure that for each coreutils program there is a corresponding
 388 # '.x' file in the 'man/' subdirectory.
 389 .PHONY: check-programs-vs-x
 390 check-programs-vs-x:
 391         @status=0;                                      \
 392         for p in dummy $(all-progs-but-lbracket); do    \
 393           case $$p in *.so) continue;; esac;            \
 394           test $$p = dummy && continue;                 \
 395           test $$p = ginstall && p=install || : ;       \
 396           test -f $(srcdir)/man/$$p.x                   \
 397             || { echo missing $$p.x 1>&2; status=1; };  \
 398         done;                                           \
 399         exit $$status
 400
 401 # Ensure we can check out on case insensitive file systems
 402 sc_case_insensitive_file_names: src/uniq
 403         @git -C $(srcdir) ls-files | sort -f | src/uniq -Di | grep . && \
 404           { echo "$(ME): the above file(s) conflict on case insensitive" \
 405           " file systems" 1>&2; exit 1; } || :
 406
 407 # Ensure that the end of each release's section is marked by two empty lines.
 408 sc_NEWS_two_empty_lines:
 409         @sed -n 4,/Noteworthy/p $(srcdir)/NEWS                          \
 410             | perl -n0e '/(^|\n)\n\n\* Noteworthy/ or exit 1'           \
 411           || { echo '$(ME): use two empty lines to separate NEWS sections' \
 412                  1>&2; exit 1; } || :
 413
 414 # With split lines, don't leave an operator at end of line.
 415 # Instead, put it on the following line, where it is more apparent.
 416 # Don't bother checking for "*" at end of line, since it provokes
 417 # far too many false positives, matching constructs like "TYPE *".
 418 # Similarly, omit "=" (initializers).
 419 binop_re_ ?= [-/+^!<>]|[-/+*^!<>=]=|&&?|\|\|?|<<=?|>>=?
 420 sc_prohibit_operator_at_end_of_line:
 421         @prohibit='. ($(binop_re_))$$'                                  \
 422         in_vc_files='\.[chly]$$'                                        \
 423         halt='found operator at end of line'                            \
 424           $(_sc_search_regexp)
 425
 426 # Partial substitutes for GNU extensions \< and \> in regexps.
 427 begword = (^|[^_[:alnum:]])
 428 endword = ($$|[^_[:alnum:]])
 429
 430 # Don't use address of "stat" or "lstat" functions
 431 sc_prohibit_stat_macro_address:
 432         @prohibit='$(begword)l?stat '':|&l?stat$(endword)'              \
 433         halt='stat() and lstat() may be function-like macros'           \
 434           $(_sc_search_regexp)
 435
 436 # Ensure that date's --help output stays in sync with the info
 437 # documentation for GNU strftime.  The only exception is %N and %q,
 438 # which date accepts but GNU strftime does not.
 439 #
 440 # "info foo" fails with error, but not "info foo >/dev/null".
 441 extract_char = sed 's/^[^%][^%]*%\(.\).*/\1/'
 442 sc_strftime_check:
 443         @if test -f $(srcdir)/src/date.c; then                          \
 444           if info libc date calendar format 2>/dev/null |               \
 445                 grep "^ *['\`]%.'$$" >$@-tmp; then                      \
 446             { echo N; echo q; $(extract_char) $@-tmp; }| sort           \
 447               >$@-info;                                                 \
 448             grep '^  %.  ' $(srcdir)/src/date.c | sort                  \
 449               | $(extract_char) > $@-src;                               \
 450             diff -u $@-src $@-info || exit 1;                           \
 451           else                                                          \
 452             echo '$(ME): skipping $@: libc info not installed' 1>&2;    \
 453           fi;                                                           \
 454           rm -f $@-info $@-src $@-tmp;                                  \
 455         fi
 456
 457 # Indent only with spaces.
 458 sc_prohibit_tab_based_indentation:
 459         @prohibit='^ *  '                                               \
 460         halt='TAB in indentation; use only spaces'                      \
 461           $(_sc_search_regexp)
 462
 463 # Enforce lowercase 'e' in "I.e.".
 464 sc_prohibit_uppercase_id_est:
 465         @prohibit='I\.E\.'                                              \
 466         halt='Uppercase "Id Est" abbreviation; use "I.e.," instead'     \
 467           $(_sc_search_regexp)
 468
 469 # Enforce double-space before "I.e." at the beginning of a sentence.
 470 sc_ensure_dblspace_after_dot_before_id_est:
 471         @prohibit='\. I\.e\.'                                           \
 472         halt='Single space after dot before "i.e."; use ".  i.e." instead' \
 473           $(_sc_search_regexp)
 474
 475 # Enforce comma after "i.e." (at least before a blank or at EOL).
 476 sc_ensure_comma_after_id_est:
 477         @prohibit='[Ii]\.e\.( |$$)'                                     \
 478         halt='Missing comma after "i.e."; use "i.e.," instead'          \
 479           $(_sc_search_regexp)
 480
 481 # The SEE ALSO section of a man page should not be terminated with
 482 # a period.  Check the first line after each "SEE ALSO" line in man/*.x:
 483 sc_prohibit_man_see_also_period:
 484         @grep -nB1 '\.$$' $$($(VC_LIST_EXCEPT) | grep 'man/.*\.x$$')    \
 485             | grep -A1 -e '-\[SEE ALSO]' | grep '\.$$' &&               \
 486           { echo '$(ME): do not end "SEE ALSO" section with a period'   \
 487               1>&2; exit 1; } || :
 488
 489 sc_prohibit_exit_write_error:
 490         @prohibit='error.*EXIT_FAILURE.*write error' \
 491         in_vc_files='\.c$$' \
 492         halt='Use write_error() instead' \
 493           $(_sc_search_regexp)
 494
 495 sc_prohibit_NULL:
 496         @prohibit='$(begword)NULL$(endword)'                            \
 497         in_vc_files='\.[ch]$$'                                          \
 498         halt='use nullptr instead'                                      \
 499           $(_sc_search_regexp)
 500
 501 # Don't use "indent-tabs-mode: nil" anymore.  No longer needed.
 502 sc_prohibit_emacs__indent_tabs_mode__setting:
 503         @prohibit='^( *[*#] *)?indent-tabs-mode:'                       \
 504         halt='use of emacs indent-tabs-mode: setting'                   \
 505           $(_sc_search_regexp)
 506
 507 # Ensure that tests don't include a redundant fail=0.
 508 sc_prohibit_fail_0:
 509         @prohibit='$(begword)fail=0$(endword)'                          \
 510         halt='fail=0 initialization'                                    \
 511           $(_sc_search_regexp)
 512
 513 # Ensure that tests don't use `cmd ... && fail=1` as that hides crashes.
 514 # The "exclude" expression allows common idioms like `test ... && fail=1`
 515 # and the 2>... portion allows commands that redirect stderr and so probably
 516 # independently check its contents and thus detect any crash messages.
 517 sc_prohibit_and_fail_1:
 518         @prohibit='&& fail=1'                                           \
 519         exclude='(returns_|stat|kill|test |EGREP|grep|compare|2> *[^/])' \
 520         halt='&& fail=1 detected. Please use: returns_ 1 ... || fail=1' \
 521         in_vc_files='^tests/'                                           \
 522           $(_sc_search_regexp)
 523
 524 # Ensure that tests don't use `cmd ... || fail` as that's a noop.
 525 sc_prohibit_or_fail:
 526         @prohibit='\|\| fail$$'                                         \
 527         exclude=':#'                                                    \
 528         halt='|| fail detected. Please use: || fail=1'                  \
 529         in_vc_files='^tests/'                                           \
 530           $(_sc_search_regexp)
 531
 532 # Ensure that env vars are not passed through returns_ as
 533 # that was seen to fail on FreeBSD /bin/sh at least
 534 sc_prohibit_env_returns:
 535         @prohibit='=[^ ]* returns_ '                                    \
 536         exclude='_ returns_ '                                           \
 537         halt='Passing env vars to returns_ is non portable'             \
 538         in_vc_files='^tests/'                                           \
 539           $(_sc_search_regexp)
 540
 541 # The mode part of a setfacl -m option argument must be three bytes long.
 542 # I.e., an argument of user:bin:rw or user:bin:r will make Solaris 10's
 543 # setfacl reject it with: "Unrecognized character found in mode field".
 544 # Use hyphens to give it a length of 3: "...:rw-" or "...:r--".
 545 sc_prohibit_short_facl_mode_spec:
 546         @prohibit='$(begword)setfacl .*-m.*:.*:[rwx-]{1,2} '            \
 547         halt='setfacl mode string length < 3; extend with hyphen(s)'    \
 548           $(_sc_search_regexp)
 549
 550 # Ensure that "stdio--.h" is used where appropriate.
 551 sc_require_stdio_safer:
 552         @if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then    \
 553           files=$$(grep -El '$(begword)freopen ?\(' $$($(VC_LIST_EXCEPT)\
 554               | grep '\.[ch]$$'));                                      \
 555           test -n "$$files" && grep -LE 'include "stdio--.h"' $$files   \
 556               | grep . &&                                               \
 557           { echo '$(ME): the above files should use "stdio--.h"'        \
 558                 1>&2; exit 1; } || :;                                   \
 559         else :;                                                         \
 560         fi
 561
 562 # Ensure that "stdlib--.h" is used where appropriate.
 563 sc_require_stdlib_safer:
 564         @if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then    \
 565           files=$$(grep -El '$(begword)mkstemp ?\(' $$($(VC_LIST_EXCEPT)\
 566               | grep '\.[ch]$$'));                                      \
 567           test -n "$$files" && grep -LE 'include "stdlib--.h"' $$files  \
 568               | grep . &&                                               \
 569           { echo '$(ME): the above files should use "stdlib--.h"'       \
 570                 1>&2; exit 1; } || :;                                   \
 571         else :;                                                         \
 572         fi
 573
 574 sc_prohibit_perl_hash_quotes:
 575         @prohibit="\{'[A-Z_]+' *[=}]"                                   \
 576         halt="in Perl code, write \$$hash{KEY}, not \$$hash{'K''EY'}"   \
 577           $(_sc_search_regexp)
 578
 579 # Prefer xnanosleep over other less-precise sleep methods
 580 sc_prohibit_sleep:
 581         @prohibit='$(begword)(nano|u)?sleep \('                         \
 582         halt='prefer xnanosleep over other sleep interfaces'            \
 583           $(_sc_search_regexp)
 584
 585 # Use print_ver_ (from init.cfg), not open-coded $VERBOSE check.
 586 sc_prohibit_verbose_version:
 587         @prohibit='test "\$$VERBOSE" = yes && .* --version'             \
 588         halt='use the print_ver_ function instead...'                   \
 589           $(_sc_search_regexp)
 590
 591 # Enforce print_ver_ tracking of dependencies
 592 # Each coreutils specific program a test requires
 593 # should be tagged by calling through env(1).
 594 sc_env_test_dependencies:
 595         @cd $(top_srcdir) && GIT_PAGER= git grep -E \
 596             "env ($$(build-aux/gen-lists-of-programs.sh --list-progs | \
 597                 grep -vF '[' |paste -d'|' -s))" tests | \
 598             sed "s/\([^:]\):.*env \([^)' ]*\).*/\1 \2/" | uniq | \
 599             while read test prog; do \
 600               printf '%s' $$test | grep '\.pl$$' >/dev/null && continue; \
 601               grep "print_ver_.* $$prog" $$test >/dev/null \
 602                 || echo $$test should call: print_ver_ $$prog; \
 603             done | grep . && exit 1 || :
 604
 605 # Use framework_failure_, not the old name without the trailing underscore.
 606 sc_prohibit_framework_failure:
 607         @prohibit='$(begword)framework_''failure$(endword)'             \
 608         halt='use framework_failure_ instead'                           \
 609           $(_sc_search_regexp)
 610
 611 # Prohibit the use of `...` in tests/.  Use $(...) instead.
 612 sc_prohibit_test_backticks:
 613         @prohibit='`' in_vc_files='^tests/'                             \
 614         halt='use $$(...), not `...` in tests/'                         \
 615           $(_sc_search_regexp)
 616
 617 # Ensure that compare is used to check empty files
 618 # so that the unexpected contents are displayed
 619 sc_prohibit_test_empty:
 620         @prohibit='test -s.*&&' in_vc_files='^tests/'                   \
 621         halt='use `compare /dev/null ...`, not `test -s ...` in tests/' \
 622           $(_sc_search_regexp)
 623
 624 # Programs like sort, ls, expr use PROG_FAILURE in place of EXIT_FAILURE.
 625 # Others, use the EXIT_CANCELED, EXIT_ENOENT, etc. macros defined in system.h.
 626 # In those programs, ensure that EXIT_FAILURE is not used by mistake.
 627 sc_some_programs_must_avoid_exit_failure:
 628         @cd $(srcdir)                                                   \
 629         && grep -nw EXIT_FAILURE                                        \
 630             $$(git grep -El '[^T]_FAILURE|EXIT_CANCELED' src/)          \
 631           | grep -v '^src/system\.h:'                                   \
 632           | grep -vE '= EXIT_FAILURE|return .* \?' | grep .             \
 633             && { echo '$(ME): do not use EXIT_FAILURE in the above'     \
 634                   1>&2; exit 1; } || :
 635
 636 # Ensure that tests call the get_min_ulimit_v_ function if using ulimit -v
 637 sc_prohibit_test_ulimit_without_require_:
 638         @(git -C $(srcdir) grep -l get_min_ulimit_v_ tests;             \
 639           git -C $(srcdir) grep -l 'ulimit -v' tests)                   \
 640           | sort | uniq -u | grep . && { echo "$(ME): the above test(s)"\
 641           " should match get_min_ulimit_v_ with ulimit -v" 1>&2; exit 1; } || :
 642
 643 # Ensure that tests call the cleanup_ function if using background processes
 644 sc_prohibit_test_background_without_cleanup_:
 645         @(git -C $(srcdir) grep -El '( &$$|&[^&]*=\$$!)' tests;         \
 646           git -C $(srcdir) grep -l 'cleanup_()' tests | sed p)          \
 647           | sort | uniq -u | grep . && { echo "$(ME): the above test(s)"\
 648           " should use cleanup_ for background processes" 1>&2; exit 1; } || :
 649
 650 # Ensure that tests call the print_ver_ function for programs which are
 651 # actually used in that test.
 652 sc_prohibit_test_calls_print_ver_with_irrelevant_argument:
 653         @git -C $(srcdir) grep -w print_ver_ tests                      \
 654           | sed 's#:print_ver_##'                                       \
 655           | { fail=0;                                                   \
 656               while read file name; do                                  \
 657                 for i in $$name; do                                     \
 658                   case "$$i" in install) i=ginstall;; esac;             \
 659                   grep -w "$$i" $$file|grep -vw print_ver_|grep . >/dev/null \
 660                     || { fail=1;                                        \
 661                          echo "*** Test: $$file, offending: $$i." 1>&2; };\
 662                 done;                                                   \
 663               done;                                                     \
 664               test $$fail = 0 || exit 1;                                \
 665             } || { echo "$(ME): the above test(s) call print_ver_ for"  \
 666                     "program(s) they don't use" 1>&2; exit 1; }
 667
 668 # Exempt the contents of any usage function from the following.
 669 _continued_string_col_1 = \
 670 s/^usage .*?\n}//ms;/\\\n\w/ and print ("$$ARGV\n"),$$e=1;END{$$e||=0;exit $$e}
 671 # Ding any source file that has a continued string with an alphabetic in the
 672 # first column of the following line.  We prohibit them because they usually
 673 # trigger false positives in tools that try to map an arbitrary line number
 674 # to the enclosing function name.  Of course, very many strings do precisely
 675 # this, *when they are part of the usage function*.  That is why we exempt
 676 # the contents of any function named "usage".
 677 sc_prohibit_continued_string_alpha_in_column_1:
 678         @perl -0777 -ne '$(_continued_string_col_1)' \
 679             $$($(VC_LIST_EXCEPT) | grep '\.[ch]$$') \
 680           || { echo '$(ME): continued string with word in first column' \
 681                 1>&2; exit 1; } || :
 682 # Use this to list offending lines:
 683 # git ls-files |grep '\.[ch]$' | xargs \
 684 #   perl -n -0777 -e 's/^usage.*?\n}//ms;/\\\n\w/ and print "$ARGV\n"' \
 685 #     | xargs grep -A1 '\\$'|grep '\.[ch][:-][_a-zA-Z]'
 686
 687
 688 ###########################################################
 689 _p0 = \([^"'/]\|"\([^\"]\|[\].\)*"\|'\([^\']\|[\].\)*'
 690 _pre = $(_p0)\|[/][^"'/*]\|[/]"\([^\"]\|[\].\)*"\|[/]'\([^\']\|[\].\)*'\)*
 691 _pre_anchored = ^\($(_pre)\)
 692 _comment_and_close = [^*]\|[*][^/*]\)*[*][*]*/
 693 # help font-lock mode: '
 694
 695 # A sed expression that removes ANSI C and ISO C99 comments.
 696 # Derived from the one in GNU gettext's 'moopp' preprocessor.
 697 _sed_remove_comments =                                  \
 698 /[/][/*]/{                                              \
 699   ta;                                                   \
 700   :a;                                                   \
 701   s,$(_pre_anchored)//.*,\1,;                           \
 702   te;                                                   \
 703   s,$(_pre_anchored)/[*]\($(_comment_and_close),\1 ,;   \
 704   ta;                                                   \
 705   /^$(_pre)[/][*]/{                                     \
 706     s,$(_pre_anchored)/[*].*,\1 ,;                      \
 707     tu;                                                 \
 708     :u;                                                 \
 709     n;                                                  \
 710     s,^\($(_comment_and_close),,;                       \
 711     tv;                                                 \
 712     s,^.*$$,,;                                          \
 713     bu;                                                 \
 714     :v;                                                 \
 715   };                                                    \
 716   :e;                                                   \
 717 }
 718 # Quote all single quotes.
 719 _sed_rm_comments_q = $(subst ','\'',$(_sed_remove_comments))
 720 # help font-lock mode: '
 721
 722 _space_before_paren_exempt =? \\n\\$$
 723 _space_before_paren_exempt = \
 724   (^ *\#|\\n\\$$|%s\(to %s|(date|group|character)\(s\))
 725 # Ensure that there is a space before each open parenthesis in C code.
 726 sc_space_before_open_paren:
 727         @if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then    \
 728           fail=0;                                                       \
 729           for c in $$($(VC_LIST_EXCEPT) | grep '\.[ch]$$'); do          \
 730             sed '$(_sed_rm_comments_q)' $$c 2>/dev/null                 \
 731               | grep -i '[[:alnum:]]('                                  \
 732               | grep -vE '$(_space_before_paren_exempt)'                \
 733               | grep . && { fail=1; echo "*** $$c"; };                  \
 734           done;                                                         \
 735           test $$fail = 1 &&                                            \
 736             { echo '$(ME): the above files lack a space-before-open-paren' \
 737                 1>&2; exit 1; } || :;                                   \
 738         else :;                                                         \
 739         fi
 740
 741 # Similar to the gnulib maint.mk rule for sc_prohibit_strcmp
 742 # Use STREQ_LEN or STRPREFIX rather than comparing strncmp == 0, or != 0.
 743 sc_prohibit_strncmp:
 744         @prohibit='^[^#].*str''ncmp *\('                                \
 745         halt='use STREQ_LEN or STRPREFIX instead of str''ncmp'          \
 746           $(_sc_search_regexp)
 747
 748 # Enforce recommended preprocessor indentation style.
 749 sc_preprocessor_indentation:
 750         @if cppi --version >/dev/null 2>&1; then                        \
 751           $(VC_LIST_EXCEPT) | grep '\.[ch]$$' | xargs cppi -a -c        \
 752             || { echo '$(ME): incorrect preprocessor indentation' 1>&2; \
 753                 exit 1; };                                              \
 754         else                                                            \
 755           echo '$(ME): skipping test $@: cppi not installed' 1>&2;      \
 756         fi
 757
 758 # THANKS.in is a list of name/email pairs for people who are mentioned in
 759 # commit logs (and generated ChangeLog), but who are not also listed as an
 760 # author of a commit.  Name/email pairs of commit authors are automatically
 761 # extracted from the repository.  As a very minor factorization, when
 762 # someone who was initially listed only in THANKS.in later authors a commit,
 763 # this rule detects that their pair may now be removed from THANKS.in.
 764 sc_THANKS_in_duplicates:
 765         @{ git -C $(srcdir) log --pretty=format:%aN | sort -u;          \
 766             cut -b-36 $(srcdir)/THANKS.in                               \
 767               | sed '/^$$/,/^$$/!d;/^$$/d;s/  *$$//'; }                 \
 768           | sort | uniq -d | grep .                                     \
 769             && { echo '$(ME): remove the above names from THANKS.in'    \
 770                   1>&2; exit 1; } || :
 771
 772 # Ensure the contributor list stays sorted.  However, if the system's
 773 # en_US.UTF-8 locale data is erroneous, give a diagnostic and skip
 774 # this test.  This affects OS X, up to at least 10.11.6.
 775 # Use our sort as other implementations may result in a different order.
 776 sc_THANKS_in_sorted:
 777         @printf 'a\n.b\n'|LC_ALL=en_US.UTF-8 src/sort -c 2> /dev/null   \
 778           && {                                                          \
 779             sed '/^$$/,/^$$/!d;/^$$/d' $(srcdir)/THANKS.in > $@.1 &&    \
 780             LC_ALL=en_US.UTF-8 src/sort -f -k1,1 $@.1 > $@.2 &&         \
 781             diff -u $@.1 $@.2; diff=$$?;                                \
 782             rm -f $@.1 $@.2;                                            \
 783             test "$$diff" = 0                                           \
 784               || { echo '$(ME): THANKS.in is unsorted' 1>&2; exit 1; }; \
 785             }                                                           \
 786           || { echo '$(ME): this system has erroneous locale data;'     \
 787                     'skipping $@' 1>&2; }
 788
 789 # Look for developer diagnostics that are marked for translation.
 790 # This won't find any for which devmsg's format string is on a separate line.
 791 sc_marked_devdiagnostics:
 792         @prohibit='$(begword)devmsg *\(.*_\('                           \
 793         halt='found marked developer diagnostic(s)'                     \
 794           $(_sc_search_regexp)
 795
 796 # Ensure we keep hex constants as 4 or 8 bytes for consistency
 797 # and so that make src/fs-magic-compare works consistently
 798 sc_fs-magic-compare:
 799         @sed -n 's|.*/\* \(0x[0-9A-Fa-f]\{1,\}\) .*\*/|\1|p'            \
 800           $(srcdir)/src/stat.c | grep -Ev '^0x([0-9A-F]{4}){1,2}$$'     \
 801             && { echo '$(ME): Constants in src/stat.c should be 4 or 8' \
 802                       'upper-case chars' 1>&2; exit 1; } || :
 803
 804 # Ensure gnulib generated files are ignored
 805 # TODO: Perhaps augment gnulib-tool to do this in lib/.gitignore?
 806 sc_gitignore_missing:
 807         @{ sed -n '/^\/lib\/.*\.h$$/{p;p}' $(srcdir)/.gitignore;        \
 808             find lib -name '*.in*' ! -name '*~' ! -name 'sys_*' |       \
 809               sed 's|^|/|; s|_\(.*in\.h\)|/\1|; s/\.in//'; } |          \
 810               sort | uniq -u | grep . && { echo '$(ME): Add above'      \
 811                 'entries to .gitignore' >&2; exit 1; } || :
 812
 813 # Flag redundant entries in .gitignore
 814 # Disabled for now as too aggressive flagging
 815 # entries like /lib/arg-nonnull.h
 816 #sc_gitignore_redundant:
 817 #       @{ grep ^/lib $(srcdir)/.gitignore;                             \
 818 #          sed 's|^|/lib|' $(srcdir)/lib/.gitignore; } |                \
 819 #           sort | uniq -d | grep . && { echo '$(ME): Remove above'     \
 820 #             'entries from .gitignore' >&2; exit 1; } || :
 821
 822 sc_prohibit-form-feed:
 823         @prohibit=$$'\f' \
 824         in_vc_files='\.[chly]$$' \
 825         halt='Form Feed (^L) detected' \
 826           $(_sc_search_regexp)
 827
 828 # Override the default Cc: used in generating an announcement.
 829 announcement_Cc_ = $(translation_project_), \
 830   coreutils@gnu.org, coreutils-announce@gnu.org
 831
 832 -include $(srcdir)/dist-check.mk
 833
 834 update-copyright-env = \
 835   UPDATE_COPYRIGHT_FORCE=1 \
 836   UPDATE_COPYRIGHT_USE_INTERVALS=2 \
 837   UPDATE_COPYRIGHT_MAX_LINE_LENGTH=79
 838
 839 # List syntax-check exemptions.
 840 exclude_file_name_regexp--sc_space_tab = \
 841   ^(tests/pr/|tests/misc/nl\.sh$$|gl/.*\.diff$$|man/help2man$$)
 842 exclude_file_name_regexp--sc_bindtextdomain = \
 843   ^(gl/.*|lib/euidaccess-stat|src/make-prime-list|src/cksum)\.c$$
 844 exclude_file_name_regexp--sc_trailing_blank = \
 845   ^(tests/pr/|gl/.*\.diff$$|man/help2man)
 846 exclude_file_name_regexp--sc_system_h_headers = \
 847   ^src/((system|copy|chown-core|find-mount-point)\.h|make-prime-list\.c)$$
 848
 849 _src := (false|lbracket|chown-(chgrp|chown)
 850 _src := $(_src)|ls-(dir|ls|vdir)|tac-pipe|uname-(arch|uname))
 851 _gl_src = (xdecto.max|cl-strtold)
 852 exclude_file_name_regexp--sc_require_config_h_first = \
 853   (^lib/buffer-lcm\.c|gl/lib/$(_gl_src)\.c|src/$(_src)\.c)$$
 854 exclude_file_name_regexp--sc_require_config_h = \
 855   $(exclude_file_name_regexp--sc_require_config_h_first)
 856
 857 exclude_file_name_regexp--sc_po_check = ^(gl/|man/help2man)
 858 exclude_file_name_regexp--sc_prohibit_always-defined_macros = \
 859   ^src/(seq|remove)\.c$$
 860 exclude_file_name_regexp--sc_prohibit_empty_lines_at_EOF = ^tests/pr/
 861 exclude_file_name_regexp--sc_program_name = \
 862   ^(gl/.*|lib/euidaccess-stat|src/make-prime-list)\.c$$
 863 exclude_file_name_regexp--sc_file_system = \
 864   NEWS|^(init\.cfg|src/df\.c|tests/df/df-P\.sh|tests/df/df-output\.sh)$$
 865 exclude_file_name_regexp--sc_prohibit_always_true_header_tests = \
 866   ^m4/stat-prog\.m4$$
 867 exclude_file_name_regexp--sc_prohibit_fail_0 = \
 868   (^.*/git-hooks/commit-msg|^tests/init\.sh|Makefile\.am|\.mk|.*\.texi)$$
 869 exclude_file_name_regexp--sc_prohibit_test_minus_ao = doc/.*\.texi$$
 870 exclude_file_name_regexp--sc_prohibit_atoi_atof = ^lib/euidaccess-stat\.c$$
 871
 872 # longlong.h is maintained elsewhere.
 873 _ll = ^src/longlong\.h$$
 874 exclude_file_name_regexp--sc_useless_cpp_parens = $(_ll)
 875 exclude_file_name_regexp--sc_space_before_open_paren = $(_ll)
 876
 877 tbi_1 = ^tests/pr/|(\.mk|^man/help2man)$$
 878 tbi_2 = ^scripts/git-hooks/(pre-commit|pre-applypatch|applypatch-msg)$$
 879 tbi_3 = (GNU)?[Mm]akefile(\.am)?$$|$(_ll)
 880 exclude_file_name_regexp--sc_prohibit_tab_based_indentation = \
 881   $(tbi_1)|$(tbi_2)|$(tbi_3)
 882
 883 exclude_file_name_regexp--sc_preprocessor_indentation = \
 884   ^(gl/lib/rand-isaac\.[ch]|gl/tests/test-rand-isaac\.c)$$|$(_ll)
 885 exclude_file_name_regexp--sc_prohibit_stat_st_blocks = \
 886   ^(src/system\.h|tests/du/2g\.sh)$$
 887
 888 exclude_file_name_regexp--sc_prohibit_continued_string_alpha_in_column_1 = \
 889   ^src/(system\.h|od\.c|printf\.c|getlimits\.c)$$
 890
 891 _cksum = ^tests/cksum/cksum-base64\.pl$$
 892 exclude_file_name_regexp--sc_prohibit_test_backticks = \
 893   ^tests/(local\.mk|(init|misc/stdbuf|factor/create-test)\.sh)$$|$(_cksum)
 894
 895 # Exempt test.c, since it's nominally shared, and relatively static.
 896 exclude_file_name_regexp--sc_prohibit_operator_at_end_of_line = \
 897   ^src/(ptx|test|head)\.c$$
 898
 899 exclude_file_name_regexp--sc_error_message_uppercase = ^src/factor\.c$$
 900 exclude_file_name_regexp--sc_prohibit_atoi_atof = ^src/make-prime-list\.c$$
 901
 902 # Exception here as we don't want __attribute elided on non GCC
 903 exclude_file_name_regexp--sc_prohibit-gl-attributes = ^src/libstdbuf\.c$$
 904
 905 exclude_file_name_regexp--sc_prohibit_uppercase_id_est = \.diff$$
 906 exclude_file_name_regexp--sc_ensure_dblspace_after_dot_before_id_est = \.diff$$
 907 exclude_file_name_regexp--sc_ensure_comma_after_id_est = \.diff|$(_ll)$$
 908 exclude_file_name_regexp--sc_long_lines = \.diff$$|$(_ll)|$(_cksum)|bootstrap
 909
 910 # `grep . -q` is not exactly equivalent to `grep . >/dev/null`
 911 # and this difference is significant in the NEWS description
 912 exclude_file_name_regexp--sc_unportable_grep_q = NEWS
 913
 914 # Augment AM_CFLAGS to include our per-directory options:
 915 AM_CFLAGS += $($(@D)_CFLAGS)
 916
 917 src_CFLAGS = $(WARN_CFLAGS)
 918 lib_CFLAGS = $(GNULIB_WARN_CFLAGS)
 919 gnulib-tests_CFLAGS = $(GNULIB_TEST_WARN_CFLAGS)
 920
 921 # Configuration to make the tight-scope syntax-check rule work with
 922 # non-recursive make.
 923 # Note _gl_TS_headers use _single line_ extern function declarations,
 924 # while *_SOURCES use the _two line_ form.
 925 export _gl_TS_headers = $(noinst_HEADERS)
 926 # Add exceptions for --enable-single-binary renamed functions.
 927 _gl_TS_unmarked_extern_functions = main usage
 928 _gl_TS_unmarked_extern_functions += single_binary_main_.* _usage_.*
 929 # Headers to search for single line extern _data_ declarations.
 930 _gl_TS_other_headers = $(srcdir)/src/*.h src/*.h
 931 # Avoid tight_scope rule stating these should be static
 932 # as there is no way to achieve that with the way these are defined.
 933 _gl_TS_unmarked_extern_vars = ptr_MD5_.*
 934 # Other tight_scope settings
 935 _gl_TS_dir = .
 936 _gl_TS_obj_files = src/*.$(OBJEXT)