cfg.mk

   1 # Customize maint.mk                           -*- makefile -*-
   2 # Copyright (C) 2003-2020 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/.*$$
  26
  27 # Tests not to run as part of "make distcheck".
  28 local-checks-to-skip = \
  29   sc_proper_name_utf8_requires_ICONV
  30
  31 # Tools used to bootstrap this package, used for "announcement".
  32 bootstrap-tools = autoconf,automake,gnulib,bison
  33
  34 # Now that we have better tests, make this the default.
  35 export VERBOSE = yes
  36
  37 # Comparing tarball sizes compressed using different xz presets, we see that
  38 # an -8e-compressed tarball is only 9KiB larger than the -9e-compressed one.
  39 # Using -8e is preferred, since that lets the decompression process use half
  40 # the memory (32MiB rather than 64MiB).
  41 # $ for i in {7,8,9}{e,}; do \
  42 #     (n=$(xz -$i < coreutils-8.15*.tar|wc -c);echo $n $i) & done |sort -nr
  43 # 5129388 7
  44 # 5036524 7e
  45 # 5017476 8
  46 # 5010604 9
  47 # 4923016 8e
  48 # 4914152 9e
  49 export XZ_OPT = -8e
  50
  51 old_NEWS_hash = 4f7638fe24dcd1759a5b0104b643a709
  52
  53 # Add an exemption for sc_makefile_at_at_check.
  54 _makefile_at_at_check_exceptions = ' && !/^cu_install_prog/ && !/dynamic-dep/'
  55
  56 # Our help-version script is in a slightly different location.
  57 _hv_file ?= $(srcdir)/tests/misc/help-version
  58
  59 # Ensure that the list of O_ symbols used to compute O_FULLBLOCK is complete.
  60 dd = $(srcdir)/src/dd.c
  61 sc_dd_O_FLAGS:
  62         @rm -f $@.1 $@.2
  63         @{ echo O_FULLBLOCK; echo O_NOCACHE;                            \
  64           perl -nle '/^ +\| (O_\w*)$$/ and print $$1' $(dd); } | sort > $@.1
  65         @{ echo O_NOFOLLOW; perl -nle '/{"[a-z]+",\s*(O_\w+)},/ and print $$1' \
  66           $(dd); } | sort > $@.2
  67         @diff -u $@.1 $@.2; diff=$$?;                                   \
  68         rm -f $@.1 $@.2;                                                \
  69         test "$$diff" = 0                                               \
  70           || { echo '$(ME): $(dd) has inconsistent O_ flag lists'>&2;   \
  71                exit 1; }
  72
  73 # Ensure that dd's definition of LONGEST_SYMBOL stays in sync
  74 # with the strings from the two affected variables.
  75 dd_c = $(srcdir)/src/dd.c
  76 sc_dd_max_sym_length:
  77 ifneq ($(wildcard $(dd_c)),)
  78         @len=$$( (sed -n '/conversions\[\] =$$/,/^};/p' $(dd_c);\
  79                  sed -n '/flags\[\] =$$/,/^};/p' $(dd_c) )      \
  80                 |sed -n '/"/s/^[^"]*"\([^"]*\)".*/\1/p'| wc -L);\
  81         max=$$(sed -n '/^#define LONGEST_SYMBOL /s///p' $(dd_c) \
  82               |tr -d '"' | wc -L);              \
  83         if test "$$len" = "$$max"; then :; else                 \
  84           echo 'dd.c: LONGEST_SYMBOL is not longest' 1>&2;      \
  85           exit 1;                                               \
  86         fi
  87 endif
  88
  89 # Many m4 macros names once began with 'jm_'.
  90 # On 2004-04-13, they were all changed to start with gl_ instead.
  91 # Make sure that none are inadvertently reintroduced.
  92 sc_prohibit_jm_in_m4:
  93         @grep -nE 'jm_[A-Z]'                                            \
  94                 $$($(VC_LIST) m4 |grep '\.m4$$'; echo /dev/null) &&     \
  95             { echo '$(ME): do not use jm_ in m4 macro names'            \
  96               1>&2; exit 1; } || :
  97
  98 # Ensure that each root-requiring test is run via the "check-root" rule.
  99 sc_root_tests:
 100         @t1=sc-root.expected; t2=sc-root.actual;                        \
 101         grep -nl '^ *require_root_$$' `$(VC_LIST) tests` |              \
 102           sed 's|.*/tests/|tests/|' | sort > $$t1;                      \
 103         for t in $(all_root_tests); do echo $$t; done | sort > $$t2;    \
 104         st=0; diff -u $$t1 $$t2 || st=1;                                \
 105         rm -f $$t1 $$t2;                                                \
 106         exit $$st
 107
 108 # Ensure that all version-controlled test cases are listed in $(all_tests).
 109 sc_tests_list_consistency:
 110         @bs="\\";                                                       \
 111         test_extensions_rx=`echo $(TEST_EXTENSIONS)                     \
 112           | sed -e "s/ /|/g" -e "s/$$bs./$$bs$$bs./g"`;                 \
 113         {                                                               \
 114           for t in $(all_tests); do echo $$t; done;                     \
 115           cd $(top_srcdir);                                             \
 116           $(SHELL) build-aux/vc-list-files tests                        \
 117             | grep -Ev '^tests/(factor/(run|create-test)|init)\.sh$$'   \
 118             | $(EGREP) "$$test_extensions_rx\$$";                       \
 119         } | sort | uniq -u | grep . && exit 1; :
 120
 121 # Ensure that all version-controlled test scripts are executable.
 122 sc_tests_executable:
 123         @set -o noglob 2>/dev/null || set -f;                              \
 124         cd $(srcdir);                                                      \
 125         find_ext="-name '' "`printf -- "-o -name *%s " $(TEST_EXTENSIONS)`;\
 126         find $(srcdir)/tests/ \( $$find_ext \) \! -perm -u+x -print        \
 127           | { sed "s|^$(srcdir)/||"; git ls-files $(srcdir)/tests/; }      \
 128           | sort | uniq -d                                                 \
 129           | sed -e "s/^/$(ME): Please make test executable: /" | grep .    \
 130             && exit 1; :
 131
 132 # Ensure all gnulib patches apply cleanly
 133 sc_ensure_gl_diffs_apply_cleanly:
 134         @find $(srcdir)/gl/ -name '*.diff' | while read p; do           \
 135           patch --fuzz=0 -f -s -d $(srcdir)/gnulib/ -p1 --dry-run < "$$p" >&2 \
 136             || { echo "$$p" >&2; echo 'To refresh all gl patches run:'  \
 137                  'make refresh-gnulib-patches' >&2; exit 1; }           \
 138         done
 139
 140 # Avoid :>file which doesn't propagate errors
 141 sc_prohibit_colon_redirection:
 142         @cd $(srcdir)/tests && GIT_PAGER= git grep -En ': *>.*\|\|'     \
 143           && { echo '$(ME): '"The leading colon in :> will hide errors" >&2; \
 144                exit 1; }  \
 145           || :
 146
 147 # Ensure emit_mandatory_arg_note() is called if required
 148 sc_ensure_emit_mandatory_arg_note:
 149         @cd $(srcdir)/src && GIT_PAGER= git \
 150           grep -l -- '^ *-[^-].*--.*[^[]=' *.c \
 151           | xargs grep -L emit_mandatory_arg_note | grep . \
 152           && { echo '$(ME): '"emit_mandatory_arg_note() missing" 1>&2; \
 153                exit 1; } || :
 154
 155 # Create a list of regular expressions matching the names
 156 # of files included from system.h.  Exclude a couple.
 157 .re-list:
 158         @sed -n '/^# *include /s///p' $(srcdir)/src/system.h \
 159           | grep -Ev 'sys/(param|file)\.h' \
 160           | sed 's/ .*//;;s/^["<]/^# *include [<"]/;s/\.h[">]$$/\\.h[">]/' \
 161           > $@-t
 162         @mv $@-t $@
 163
 164 define gl_trap_
 165   Exit () { set +e; (exit $$1); exit $$1; };                            \
 166   for sig in 1 2 3 13 15; do                                            \
 167     eval "trap 'Exit $$(expr $$sig + 128)' $$sig";                      \
 168   done
 169 endef
 170
 171 # Files in src/ should not include directly any of
 172 # the headers already included via system.h.
 173 sc_system_h_headers: .re-list
 174         @if test -f $(srcdir)/src/system.h; then                        \
 175           trap 'rc=$$?; rm -f .re-list; exit $$rc' 0;                   \
 176           $(gl_trap_);                                                  \
 177           grep -nE -f .re-list                                          \
 178               $$($(VC_LIST_EXCEPT) | grep '^\($(srcdir)/\)\?src/')      \
 179             && { echo '$(ME): the above are already included via system.h'\
 180                   1>&2;  exit 1; } || :;                                \
 181         fi
 182
 183 # Files in src/ should not use '%s' notation in format strings,
 184 # i.e., single quotes around %s (or similar) should be avoided.
 185 sc_prohibit_quotes_notation:
 186         @cd $(srcdir)/src && GIT_PAGER= git grep -n "\".*[\`']%s'.*\"" *.c \
 187           && { echo '$(ME): '"Use quote() to avoid quoted '%s' notation" 1>&2; \
 188                exit 1; }  \
 189           || :
 190
 191 # Files in src/ should quote all strings in error() output, so that
 192 # unexpected input chars like \r etc. don't corrupt the error.
 193 # In edge cases this can be avoided by putting the format string
 194 # on a separate line to the following arguments.
 195 sc_error_quotes:
 196         @cd $(srcdir)/src && GIT_PAGER= git grep -n 'error *(.*%s.*, [^(]*);$$'\
 197           *.c | grep -v ', q' \
 198           && { echo '$(ME): '"Use quote() for error string arguments" 1>&2; \
 199                exit 1; }  \
 200           || :
 201
 202 # Files in src/ should quote all file names in error() output
 203 # using quotef(), to provide quoting only when necessary,
 204 # but also provide better support for copy and paste when used.
 205 sc_error_shell_quotes:
 206         @cd $(srcdir)/src && \
 207           { GIT_PAGER= git grep -E \
 208             'error \(.*%s[:"], .*(name|file)[^"]*\);$$' *.c; \
 209             GIT_PAGER= git grep -E \
 210             ' quote[ _].*file' *.c; } \
 211           | grep -Ev '(quotef|q[^ ]*name)' \
 212           && { echo '$(ME): '"Use quotef() for colon delimited names" 1>&2; \
 213                exit 1; }  \
 214           || :
 215
 216 # Files in src/ should quote all file names in error() output
 217 # using quoteaf() when the name is separated with spaces,
 218 # to distinguish the file name at issue and
 219 # to provide better support for copy and paste.
 220 sc_error_shell_always_quotes:
 221         @cd $(srcdir)/src && GIT_PAGER= git grep -E \
 222             'error \(.*[^:] %s[ "].*, .*(name|file)[^"]*\);$$' \
 223             *.c | grep -Ev '(quoteaf|q[^ ]*name)' \
 224           && { echo '$(ME): '"Use quoteaf() for space delimited names" 1>&2; \
 225                exit 1; }  \
 226           || :
 227         @cd $(srcdir)/src && GIT_PAGER= git grep -E -A1 \
 228             'error \([^%]*[^:] %s[ "]' *.c | grep 'quotef' \
 229           && { echo '$(ME): '"Use quoteaf() for space delimited names" 1>&2; \
 230                exit 1; }  \
 231           || :
 232
 233 # Usage of error() with an exit constant, should instead use die(),
 234 # as that avoids warnings and may generate better code, due to being apparent
 235 # to the compiler that it doesn't return.
 236 sc_die_EXIT_FAILURE:
 237         @cd $(srcdir)/src && GIT_PAGER= git grep -E \
 238             'error \(.*_(FAILURE|INVALID)' \
 239           && { echo '$(ME): '"Use die() instead of error" 1>&2; \
 240                exit 1; }  \
 241           || :
 242
 243 # Avoid unstyled quoting to internal slots and thus destined for diagnostics
 244 # as that can leak unescaped control characters to the output, when using
 245 # the default "literal" quoting style.
 246 # Instead use quotef(), or quoteaf() or in edge cases quotearg_n_style_colon().
 247 # A more general PCRE would be @prohibit='quotearg_.*(?!(style|buffer))'
 248 sc_prohibit-quotearg:
 249         @prohibit='quotearg(_n)?(|_colon|_char|_mem) ' \
 250         in_vc_files='\.c$$' \
 251         halt='Unstyled diagnostic quoting detected' \
 252           $(_sc_search_regexp)
 253
 254 sc_prohibit-skip:
 255         @prohibit='\|\| skip ' \
 256         halt='Use skip_ not skip' \
 257           $(_sc_search_regexp)
 258
 259 sc_sun_os_names:
 260         @grep -nEi \
 261             'solaris[^[:alnum:]]*2\.(7|8|9|[1-9][0-9])|sunos[^[:alnum:]][6-9]' \
 262             $$($(VC_LIST_EXCEPT)) &&                                    \
 263           { echo '$(ME): found misuse of Sun OS version numbers' 1>&2;  \
 264             exit 1; } || :
 265
 266 # Ensure that the list of programs and author names is accurate.
 267 # We need a UTF8 locale.  If a lack of locale support or a missing
 268 # translation inhibits printing of UTF-8 names, just skip this test.
 269 au_dotdot = authors-dotdot
 270 au_actual = authors-actual
 271 sc_check-AUTHORS: $(all_programs)
 272         @locale=en_US.UTF-8;                            \
 273         LC_ALL=$$locale ./src/factor --version          \
 274             | grep ' Torbjorn ' > /dev/null             \
 275           && { echo "$@: skipping this check"; exit 0; }; \
 276         rm -f $(au_actual) $(au_dotdot);                \
 277         for i in `ls $(all_programs)                    \
 278             | sed -e 's,^src/,,' -e 's,$(EXEEXT)$$,,'   \
 279             | sed /libstdbuf/d                          \
 280             | $(ASSORT) -u`; do                         \
 281           test "$$i" = '[' && continue;                 \
 282           exe=$$i;                                      \
 283           if test "$$i" = install; then                 \
 284             exe=ginstall;                               \
 285           elif test "$$i" = test; then                  \
 286             exe='[';                                    \
 287           fi;                                           \
 288           LC_ALL=$$locale ./src/$$exe --version         \
 289             | perl -0 -p -e 's/,\n/, /gm'               \
 290             | sed -n -e '/Written by /{ s//'"$$i"': /;' \
 291                   -e 's/,* and /, /; s/\.$$//; p; }';   \
 292         done > $(au_actual) &&                          \
 293         sed -n '/^[^ ][^ ]*:/p' $(srcdir)/AUTHORS > $(au_dotdot) \
 294           && diff $(au_actual) $(au_dotdot) \
 295           && rm -f $(au_actual) $(au_dotdot)
 296
 297 # Each program with a non-ASCII author name must link with LIBICONV.
 298 sc_check-I18N-AUTHORS:
 299         @cd $(srcdir)/src &&                                            \
 300           for i in $$(git grep -l -w proper_name_utf8 *.c|sed 's/\.c//'); do \
 301             grep -E "^src_$${i}_LDADD"' .?= .*\$$\(LIBICONV\)' local.mk \
 302                 > /dev/null                                             \
 303               || { echo "$(ME): link rules for $$i do not include"      \
 304                     '$$(LIBICONV)' 1>&2; exit 1; };                     \
 305           done
 306
 307 # Disallow the C99 printf size specifiers %z and %j as they're not portable.
 308 # The gnulib printf replacement does support them, however the printf
 309 # replacement is not currently explicitly depended on by the gnulib error()
 310 # module for example.  Also we use fprintf() in a few places to output simple
 311 # formats but don't use the gnulib module as it is seen as overkill at present.
 312 # We'd have to adjust the above gnulib items before disabling this.
 313 sc_prohibit-c99-printf-format:
 314         @cd $(srcdir)/src && GIT_PAGER= git grep -n '%[0*]*[jz][udx]' *.c    \
 315           && { echo '$(ME): Use PRI*MAX instead of %j or %z' 1>&2; exit 1; } \
 316           || :
 317
 318 # Ensure the alternative __attribute (keyword) form isn't used as
 319 # that form is not elided where required.  Also ensure that we don't
 320 # directly use attributes already defined by gnulib.
 321 # TODO: move the check for _GL... attributes to gnulib.
 322 sc_prohibit-gl-attributes:
 323         @prohibit='__attribute |__(unused|pure|const)__'        \
 324         in_vc_files='\.[ch]$$'                                  \
 325         halt='Use _GL... attribute macros'                      \
 326           $(_sc_search_regexp)
 327
 328 # Look for lines longer than 80 characters, except omit:
 329 # - urls
 330 # - the help2man script copied from upstream,
 331 # - tests involving long checksum lines, and
 332 # - the 'pr' test cases.
 333 FILTER_LONG_LINES =                                             \
 334   \|^[^:]*NEWS:.*https\{,1\}://| d;                                     \
 335   \|^[^:]*man/help2man:| d;                                     \
 336   \|^[^:]*tests/misc/sha[0-9]*sum.*\.pl[-:]| d;                 \
 337   \|^[^:]*tests/pr/|{ \|^[^:]*tests/pr/pr-tests:| !d; };
 338 sc_long_lines:
 339         @wc -L /dev/null >/dev/null 2>/dev/null                         \
 340            || { echo "$@: skipping: wc -L not supported"; exit 0; };    \
 341         sed -r 1q /dev/null 2>/dev/null                                 \
 342            || { echo "$@: skipping: sed -r not supported"; exit 0; };   \
 343         files=$$($(VC_LIST_EXCEPT) | xargs wc -L | sed -rn '/ total$$/d;\
 344                   s/^ *(8[1-9]|9[0-9]|[0-9]{3,}) //p');                 \
 345         halt='line(s) with more than 80 characters; reindent';          \
 346         for file in $$files; do                                         \
 347           expand $$file | grep -nE '^.{80}.' |                          \
 348           sed -e "s|^|$$file:|" -e '$(FILTER_LONG_LINES)';              \
 349         done | grep . && { msg="$$halt" $(_sc_say_and_exit) } || :
 350
 351 # Option descriptions should not start with a capital letter.
 352 # One could grep source directly as follows:
 353 # grep -E " {2,6}-.*[^.]  [A-Z][a-z]" $$($(VC_LIST_EXCEPT) | grep '\.c$$')
 354 # but that would miss descriptions not on the same line as the -option.
 355 sc_option_desc_uppercase: $(ALL_MANS)
 356         @grep '^\\fB\\-' -A1 man/*.1 | LC_ALL=C grep '\.1.[A-Z][a-z]'   \
 357           && { echo 1>&2 '$@: found initial capitals in --help'; exit 1; } || :
 358
 359 # Ensure all man/*.[1x] files are present.
 360 sc_man_file_correlation: check-x-vs-1 check-programs-vs-x
 361
 362 # Ensure that for each .x file in the 'man/' subdirectory, there is a
 363 # corresponding .1 file in the definition of $(EXTRA_MANS).
 364 # But since that expansion usually lacks programs like arch and hostname,
 365 # add them here manually.
 366 .PHONY: check-x-vs-1
 367 check-x-vs-1:
 368         @PATH=./src$(PATH_SEPARATOR)$$PATH; export PATH;                \
 369         t=$@-t;                                                         \
 370         (cd $(srcdir)/man && ls -1 *.x)                                 \
 371           | sed 's/\.x$$//' | $(ASSORT) > $$t;                          \
 372         (echo $(patsubst man/%,%,$(ALL_MANS))                           \
 373           | tr -s ' ' '\n' | sed 's/\.1$$//')                           \
 374           | $(ASSORT) -u | diff - $$t || { rm $$t; exit 1; };           \
 375         rm $$t
 376
 377 # Ensure that non-trivial .x files in the 'man/' subdirectory,
 378 # i.e., files exceeding a line count of 20 or a byte count of 1000,
 379 # contain a Copyright notice.
 380 .PHONY: sc_man_check_x_copyright
 381 sc_man_check_x_copyright:
 382         @status=0;                                                      \
 383         cd $(srcdir) && wc -cl man/*.x | head -n-1                      \
 384           | awk '$$1 >= 20 || $$2 >= 1000 {print $$3}'                  \
 385           | xargs grep -L 'Copyright .* Free Software Foundation'       \
 386           | grep .                                                      \
 387           && { echo  1>&2 '$@: exceeding file size/line count limit'    \
 388                   '- please add a copyright note'; status=1; };         \
 389         exit $$status
 390
 391 # Writing a portable rule to generate a manpage like '[.1' would be
 392 # a nightmare, so filter that out.
 393 all-progs-but-lbracket = $(filter-out [,$(patsubst src/%,%,$(all_programs)))
 394
 395 # Ensure that for each coreutils program there is a corresponding
 396 # '.x' file in the 'man/' subdirectory.
 397 .PHONY: check-programs-vs-x
 398 check-programs-vs-x:
 399         @status=0;                                      \
 400         for p in dummy $(all-progs-but-lbracket); do    \
 401           case $$p in *.so) continue;; esac;            \
 402           test $$p = dummy && continue;                 \
 403           test $$p = ginstall && p=install || : ;       \
 404           test -f $(srcdir)/man/$$p.x                   \
 405             || { echo missing $$p.x 1>&2; status=1; };  \
 406         done;                                           \
 407         exit $$status
 408
 409 # Ensure we can check out on case insensitive file systems
 410 sc_case_insensitive_file_names: src/uniq
 411         @git -C $(srcdir) ls-files | sort -f | src/uniq -Di | grep . && \
 412           { echo "$(ME): the above file(s) conflict on case insensitive" \
 413           " file systems" 1>&2; exit 1; } || :
 414
 415 # Ensure that the end of each release's section is marked by two empty lines.
 416 sc_NEWS_two_empty_lines:
 417         @sed -n 4,/Noteworthy/p $(srcdir)/NEWS                          \
 418             | perl -n0e '/(^|\n)\n\n\* Noteworthy/ or exit 1'           \
 419           || { echo '$(ME): use two empty lines to separate NEWS sections' \
 420                  1>&2; exit 1; } || :
 421
 422 # With split lines, don't leave an operator at end of line.
 423 # Instead, put it on the following line, where it is more apparent.
 424 # Don't bother checking for "*" at end of line, since it provokes
 425 # far too many false positives, matching constructs like "TYPE *".
 426 # Similarly, omit "=" (initializers).
 427 binop_re_ ?= [-/+^!<>]|[-/+*^!<>=]=|&&?|\|\|?|<<=?|>>=?
 428 sc_prohibit_operator_at_end_of_line:
 429         @prohibit='. ($(binop_re_))$$'                                  \
 430         in_vc_files='\.[chly]$$'                                        \
 431         halt='found operator at end of line'                            \
 432           $(_sc_search_regexp)
 433
 434 # Don't use "readlink" or "readlinkat" directly
 435 sc_prohibit_readlink:
 436         @prohibit='\<readlink(at)? \('                                  \
 437         halt='do not use readlink(at); use via xreadlink or areadlink*' \
 438           $(_sc_search_regexp)
 439
 440 # Don't use address of "stat" or "lstat" functions
 441 sc_prohibit_stat_macro_address:
 442         @prohibit='\<l?stat '':|&l?stat\>'                              \
 443         halt='stat() and lstat() may be function-like macros'           \
 444           $(_sc_search_regexp)
 445
 446 # Ensure that date's --help output stays in sync with the info
 447 # documentation for GNU strftime.  The only exception is %N and %q,
 448 # which date accepts but GNU strftime does not.
 449 #
 450 # "info foo" fails with error, but not "info foo >/dev/null".
 451 extract_char = sed 's/^[^%][^%]*%\(.\).*/\1/'
 452 sc_strftime_check:
 453         @if test -f $(srcdir)/src/date.c; then                          \
 454           if info libc date calendar format 2>/dev/null |               \
 455                 grep "^ *['\`]%.'$$" >$@-tmp; then                      \
 456             { echo N; echo q; $(extract_char) $@-tmp; }| sort           \
 457               >$@-info;                                                 \
 458             grep '^  %.  ' $(srcdir)/src/date.c | sort                  \
 459               | $(extract_char) > $@-src;                               \
 460             diff -u $@-src $@-info || exit 1;                           \
 461           else                                                          \
 462             echo '$(ME): skipping $@: libc info not installed' 1>&2;    \
 463           fi;                                                           \
 464           rm -f $@-info $@-src $@-tmp;                                  \
 465         fi
 466
 467 # Indent only with spaces.
 468 sc_prohibit_tab_based_indentation:
 469         @prohibit='^ *  '                                               \
 470         halt='TAB in indentation; use only spaces'                      \
 471           $(_sc_search_regexp)
 472
 473 # Enforce lowercase 'e' in "I.e.".
 474 sc_prohibit_uppercase_id_est:
 475         @prohibit='I\.E\.'                                              \
 476         halt='Uppercase "Id Est" abbreviation; use "I.e.," instead'     \
 477           $(_sc_search_regexp)
 478
 479 # Enforce double-space before "I.e." at the beginning of a sentence.
 480 sc_ensure_dblspace_after_dot_before_id_est:
 481         @prohibit='\. I\.e\.'                                           \
 482         halt='Single space after dot before "i.e."; use ".  i.e." instead' \
 483           $(_sc_search_regexp)
 484
 485 # Enforce comma after "i.e." (at least before a blank or at EOL).
 486 sc_ensure_comma_after_id_est:
 487         @prohibit='[Ii]\.e\.( |$$)'                                     \
 488         halt='Missing comma after "i.e."; use "i.e.," instead'          \
 489           $(_sc_search_regexp)
 490
 491 # The SEE ALSO section of a man page should not be terminated with
 492 # a period.  Check the first line after each "SEE ALSO" line in man/*.x:
 493 sc_prohibit_man_see_also_period:
 494         @grep -nB1 '\.$$' $$($(VC_LIST_EXCEPT) | grep 'man/.*\.x$$')    \
 495             | grep -A1 -e '-\[SEE ALSO\]' | grep '\.$$' &&              \
 496           { echo '$(ME): do not end "SEE ALSO" section with a period'   \
 497               1>&2; exit 1; } || :
 498
 499 # Don't use "indent-tabs-mode: nil" anymore.  No longer needed.
 500 sc_prohibit_emacs__indent_tabs_mode__setting:
 501         @prohibit='^( *[*#] *)?indent-tabs-mode:'                       \
 502         halt='use of emacs indent-tabs-mode: setting'                   \
 503           $(_sc_search_regexp)
 504
 505 # Ensure that tests don't include a redundant fail=0.
 506 sc_prohibit_fail_0:
 507         @prohibit='\<fail=0\>'                                          \
 508         halt='fail=0 initialization'                                    \
 509           $(_sc_search_regexp)
 510
 511 # Ensure that tests don't use `cmd ... && fail=1` as that hides crashes.
 512 # The "exclude" expression allows common idioms like `test ... && fail=1`
 513 # and the 2>... portion allows commands that redirect stderr and so probably
 514 # independently check its contents and thus detect any crash messages.
 515 sc_prohibit_and_fail_1:
 516         @prohibit='&& fail=1'                                           \
 517         exclude='(returns_|stat|kill|test |EGREP|grep|compare|2> *[^/])' \
 518         halt='&& fail=1 detected. Please use: returns_ 1 ... || fail=1' \
 519         in_vc_files='^tests/'                                           \
 520           $(_sc_search_regexp)
 521
 522 # Ensure that tests don't use `cmd ... || fail` as that's a noop.
 523 sc_prohibit_or_fail:
 524         @prohibit='\|\| fail$$'                                         \
 525         exclude=':#'                                                    \
 526         halt='|| fail detected. Please use: || fail=1'                  \
 527         in_vc_files='^tests/'                                           \
 528           $(_sc_search_regexp)
 529
 530 # Ensure that env vars are not passed through returns_ as
 531 # that was seen to fail on FreeBSD /bin/sh at least
 532 sc_prohibit_env_returns:
 533         @prohibit='=[^ ]* returns_ '                                    \
 534         exclude='_ returns_ '                                           \
 535         halt='Passing env vars to returns_ is non portable'             \
 536         in_vc_files='^tests/'                                           \
 537           $(_sc_search_regexp)
 538
 539 # The mode part of a setfacl -m option argument must be three bytes long.
 540 # I.e., an argument of user:bin:rw or user:bin:r will make Solaris 10's
 541 # setfacl reject it with: "Unrecognized character found in mode field".
 542 # Use hyphens to give it a length of 3: "...:rw-" or "...:r--".
 543 sc_prohibit_short_facl_mode_spec:
 544         @prohibit='\<setfacl .*-m.*:.*:[rwx-]{1,2} '                    \
 545         halt='setfacl mode string length < 3; extend with hyphen(s)'    \
 546           $(_sc_search_regexp)
 547
 548 # Ensure that "stdio--.h" is used where appropriate.
 549 sc_require_stdio_safer:
 550         @if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then    \
 551           files=$$(grep -l '\bfreopen \?(' $$($(VC_LIST_EXCEPT)         \
 552               | grep '\.[ch]$$'));                                      \
 553           test -n "$$files" && grep -LE 'include "stdio--.h"' $$files   \
 554               | grep . &&                                               \
 555           { echo '$(ME): the above files should use "stdio--.h"'        \
 556                 1>&2; exit 1; } || :;                                   \
 557         else :;                                                         \
 558         fi
 559
 560 sc_prohibit_perl_hash_quotes:
 561         @prohibit="\{'[A-Z_]+' *[=}]"                                   \
 562         halt="in Perl code, write \$$hash{KEY}, not \$$hash{'K''EY'}"   \
 563           $(_sc_search_regexp)
 564
 565 # Prefer xnanosleep over other less-precise sleep methods
 566 sc_prohibit_sleep:
 567         @prohibit='\<(nano|u)?sleep \('                                 \
 568         halt='prefer xnanosleep over other sleep interfaces'            \
 569           $(_sc_search_regexp)
 570
 571 # Use print_ver_ (from init.cfg), not open-coded $VERBOSE check.
 572 sc_prohibit_verbose_version:
 573         @prohibit='test "\$$VERBOSE" = yes && .* --version'             \
 574         halt='use the print_ver_ function instead...'                   \
 575           $(_sc_search_regexp)
 576
 577 # Enforce print_ver_ tracking of dependencies
 578 # Each coreutils specific program a test requires
 579 # should be tagged by calling through env(1).
 580 sc_env_test_dependencies:
 581         @cd $(top_srcdir) && GIT_PAGER= git grep -E \
 582             "env ($$(build-aux/gen-lists-of-programs.sh --list-progs | \
 583                 grep -vF '[' |paste -d'|' -s))" tests | \
 584             sed "s/\([^:]\):.*env \([^)' ]*\).*/\1 \2/" | uniq | \
 585             while read test prog; do \
 586               printf '%s' $$test | grep -q '\.pl$$' && continue; \
 587               grep -q "print_ver_.* $$prog" $$test \
 588                 || echo $$test should call: print_ver_ $$prog; \
 589             done | grep . && exit 1 || :
 590
 591 # Use framework_failure_, not the old name without the trailing underscore.
 592 sc_prohibit_framework_failure:
 593         @prohibit='\<framework_''failure\>'                             \
 594         halt='use framework_failure_ instead'                           \
 595           $(_sc_search_regexp)
 596
 597 # Prohibit the use of `...` in tests/.  Use $(...) instead.
 598 sc_prohibit_test_backticks:
 599         @prohibit='`' in_vc_files='^tests/'                             \
 600         halt='use $$(...), not `...` in tests/'                         \
 601           $(_sc_search_regexp)
 602
 603 # Ensure that compare is used to check empty files
 604 # so that the unexpected contents are displayed
 605 sc_prohibit_test_empty:
 606         @prohibit='test -s.*&&' in_vc_files='^tests/'                   \
 607         halt='use `compare /dev/null ...`, not `test -s ...` in tests/' \
 608           $(_sc_search_regexp)
 609
 610 # Ensure that expr doesn't work directly on various unsigned int types,
 611 # as that's not generally supported without GMP.
 612 sc_prohibit_expr_unsigned:
 613         @prohibit='expr .*(UINT|ULONG|[^S]SIZE|[UGP]ID|UINTMAX)'        \
 614         halt='avoid passing unsigned limits to `expr` (without GMP)'    \
 615         in_vc_files='^tests/'                                           \
 616           $(_sc_search_regexp)
 617
 618 # Programs like sort, ls, expr use PROG_FAILURE in place of EXIT_FAILURE.
 619 # Others, use the EXIT_CANCELED, EXIT_ENOENT, etc. macros defined in system.h.
 620 # In those programs, ensure that EXIT_FAILURE is not used by mistake.
 621 sc_some_programs_must_avoid_exit_failure:
 622         @cd $(srcdir)                                                   \
 623         && grep -nw EXIT_FAILURE                                        \
 624             $$(git grep -El '[^T]_FAILURE|EXIT_CANCELED' $(srcdir)/src) \
 625           | grep -vE '= EXIT_FAILURE|return .* \?' | grep .             \
 626             && { echo '$(ME): do not use EXIT_FAILURE in the above'     \
 627                   1>&2; exit 1; } || :
 628
 629 # Ensure that tests call the get_min_ulimit_v_ function if using ulimit -v
 630 sc_prohibit_test_ulimit_without_require_:
 631         @(git -C $(srcdir) grep -l get_min_ulimit_v_ tests;             \
 632           git -C $(srcdir) grep -l 'ulimit -v' tests)                   \
 633           | sort | uniq -u | grep . && { echo "$(ME): the above test(s)"\
 634           " should match get_min_ulimit_v_ with ulimit -v" 1>&2; exit 1; } || :
 635
 636 # Ensure that tests call the cleanup_ function if using background processes
 637 sc_prohibit_test_background_without_cleanup_:
 638         @(git -C $(srcdir) grep -El '( &$$|&[^&]*=\$$!)' tests;         \
 639           git -C $(srcdir) grep -l 'cleanup_()' tests | sed p)          \
 640           | sort | uniq -u | grep . && { echo "$(ME): the above test(s)"\
 641           " should use cleanup_ for background processes" 1>&2; exit 1; } || :
 642
 643 # Ensure that tests call the print_ver_ function for programs which are
 644 # actually used in that test.
 645 sc_prohibit_test_calls_print_ver_with_irrelevant_argument:
 646         @git -C $(srcdir) grep -w print_ver_ tests                      \
 647           | sed 's#:print_ver_##'                                       \
 648           | { fail=0;                                                   \
 649               while read file name; do                                  \
 650                 for i in $$name; do                                     \
 651                   case "$$i" in install) i=ginstall;; esac;             \
 652                   grep -w "$$i" $$file|grep -vw print_ver_|grep -q .    \
 653                     || { fail=1;                                        \
 654                          echo "*** Test: $$file, offending: $$i." 1>&2; };\
 655                 done;                                                   \
 656               done;                                                     \
 657               test $$fail = 0 || exit 1;                                \
 658             } || { echo "$(ME): the above test(s) call print_ver_ for"  \
 659                     "program(s) they don't use" 1>&2; exit 1; }
 660
 661 # Exempt the contents of any usage function from the following.
 662 _continued_string_col_1 = \
 663 s/^usage .*?\n}//ms;/\\\n\w/ and print ("$$ARGV\n"),$$e=1;END{$$e||=0;exit $$e}
 664 # Ding any source file that has a continued string with an alphabetic in the
 665 # first column of the following line.  We prohibit them because they usually
 666 # trigger false positives in tools that try to map an arbitrary line number
 667 # to the enclosing function name.  Of course, very many strings do precisely
 668 # this, *when they are part of the usage function*.  That is why we exempt
 669 # the contents of any function named "usage".
 670 sc_prohibit_continued_string_alpha_in_column_1:
 671         @perl -0777 -ne '$(_continued_string_col_1)' \
 672             $$($(VC_LIST_EXCEPT) | grep '\.[ch]$$') \
 673           || { echo '$(ME): continued string with word in first column' \
 674                 1>&2; exit 1; } || :
 675 # Use this to list offending lines:
 676 # git ls-files |grep '\.[ch]$' | xargs \
 677 #   perl -n -0777 -e 's/^usage.*?\n}//ms;/\\\n\w/ and print "$ARGV\n"' \
 678 #     | xargs grep -A1 '\\$'|grep '\.[ch][:-][_a-zA-Z]'
 679
 680
 681 ###########################################################
 682 _p0 = \([^"'/]\|"\([^\"]\|[\].\)*"\|'\([^\']\|[\].\)*'
 683 _pre = $(_p0)\|[/][^"'/*]\|[/]"\([^\"]\|[\].\)*"\|[/]'\([^\']\|[\].\)*'\)*
 684 _pre_anchored = ^\($(_pre)\)
 685 _comment_and_close = [^*]\|[*][^/*]\)*[*][*]*/
 686 # help font-lock mode: '
 687
 688 # A sed expression that removes ANSI C and ISO C99 comments.
 689 # Derived from the one in GNU gettext's 'moopp' preprocessor.
 690 _sed_remove_comments =                                  \
 691 /[/][/*]/{                                              \
 692   ta;                                                   \
 693   :a;                                                   \
 694   s,$(_pre_anchored)//.*,\1,;                           \
 695   te;                                                   \
 696   s,$(_pre_anchored)/[*]\($(_comment_and_close),\1 ,;   \
 697   ta;                                                   \
 698   /^$(_pre)[/][*]/{                                     \
 699     s,$(_pre_anchored)/[*].*,\1 ,;                      \
 700     tu;                                                 \
 701     :u;                                                 \
 702     n;                                                  \
 703     s,^\($(_comment_and_close),,;                       \
 704     tv;                                                 \
 705     s,^.*$$,,;                                          \
 706     bu;                                                 \
 707     :v;                                                 \
 708   };                                                    \
 709   :e;                                                   \
 710 }
 711 # Quote all single quotes.
 712 _sed_rm_comments_q = $(subst ','\'',$(_sed_remove_comments))
 713 # help font-lock mode: '
 714
 715 _space_before_paren_exempt =? \\n\\$$
 716 _space_before_paren_exempt = \
 717   (^ *\#|\\n\\$$|%s\(to %s|(date|group|character)\(s\))
 718 # Ensure that there is a space before each open parenthesis in C code.
 719 sc_space_before_open_paren:
 720         @if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then    \
 721           fail=0;                                                       \
 722           for c in $$($(VC_LIST_EXCEPT) | grep '\.[ch]$$'); do          \
 723             sed '$(_sed_rm_comments_q)' $$c 2>/dev/null                 \
 724               | grep -i '[[:alnum:]]('                                  \
 725               | grep -vE '$(_space_before_paren_exempt)'                \
 726               | grep . && { fail=1; echo "*** $$c"; };                  \
 727           done;                                                         \
 728           test $$fail = 1 &&                                            \
 729             { echo '$(ME): the above files lack a space-before-open-paren' \
 730                 1>&2; exit 1; } || :;                                   \
 731         else :;                                                         \
 732         fi
 733
 734 # Similar to the gnulib maint.mk rule for sc_prohibit_strcmp
 735 # Use STREQ_LEN or STRPREFIX rather than comparing strncmp == 0, or != 0.
 736 sc_prohibit_strncmp:
 737         @prohibit='^[^#].*str''ncmp *\('                                \
 738         halt='use STREQ_LEN or STRPREFIX instead of str''ncmp'          \
 739           $(_sc_search_regexp)
 740
 741 # Enforce recommended preprocessor indentation style.
 742 sc_preprocessor_indentation:
 743         @if cppi --version >/dev/null 2>&1; then                        \
 744           $(VC_LIST_EXCEPT) | grep '\.[ch]$$' | xargs cppi -a -c        \
 745             || { echo '$(ME): incorrect preprocessor indentation' 1>&2; \
 746                 exit 1; };                                              \
 747         else                                                            \
 748           echo '$(ME): skipping test $@: cppi not installed' 1>&2;      \
 749         fi
 750
 751 # THANKS.in is a list of name/email pairs for people who are mentioned in
 752 # commit logs (and generated ChangeLog), but who are not also listed as an
 753 # author of a commit.  Name/email pairs of commit authors are automatically
 754 # extracted from the repository.  As a very minor factorization, when
 755 # someone who was initially listed only in THANKS.in later authors a commit,
 756 # this rule detects that their pair may now be removed from THANKS.in.
 757 sc_THANKS_in_duplicates:
 758         @{ git -C $(srcdir) log --pretty=format:%aN | sort -u;          \
 759             cut -b-36 $(srcdir)/THANKS.in                               \
 760               | sed '/^$$/,/^$$/!d;/^$$/d;s/  *$$//'; }                 \
 761           | sort | uniq -d | grep .                                     \
 762             && { echo '$(ME): remove the above names from THANKS.in'    \
 763                   1>&2; exit 1; } || :
 764
 765 # Ensure the contributor list stays sorted.  However, if the system's
 766 # en_US.UTF-8 locale data is erroneous, give a diagnostic and skip
 767 # this test.  This affects OS X, up to at least 10.11.6.
 768 # Use our sort as other implementations may result in a different order.
 769 sc_THANKS_in_sorted:
 770         @printf 'a\n.b\n'|LC_ALL=en_US.UTF-8 src/sort -c 2> /dev/null   \
 771           && {                                                          \
 772             sed '/^$$/,/^$$/!d;/^$$/d' $(srcdir)/THANKS.in > $@.1 &&    \
 773             LC_ALL=en_US.UTF-8 src/sort -f -k1,1 $@.1 > $@.2 &&         \
 774             diff -u $@.1 $@.2; diff=$$?;                                \
 775             rm -f $@.1 $@.2;                                            \
 776             test "$$diff" = 0                                           \
 777               || { echo '$(ME): THANKS.in is unsorted' 1>&2; exit 1; }; \
 778             }                                                           \
 779           || { echo '$(ME): this system has erroneous locale data;'     \
 780                     'skipping $@' 1>&2; }
 781
 782 # Look for developer diagnostics that are marked for translation.
 783 # This won't find any for which devmsg's format string is on a separate line.
 784 sc_marked_devdiagnostics:
 785         @prohibit='\<devmsg *\(.*_\('                                   \
 786         halt='found marked developer diagnostic(s)'                     \
 787           $(_sc_search_regexp)
 788
 789 # Ensure we keep hex constants as 4 or 8 bytes for consistency
 790 # and so that make src/fs-magic-compare works consistently
 791 sc_fs-magic-compare:
 792         @sed -n 's|.*/\* \(0x[0-9A-Fa-f]\{1,\}\) .*\*/|\1|p'            \
 793           $(srcdir)/src/stat.c | grep -Ev '^0x([0-9A-F]{4}){1,2}$$'     \
 794             && { echo '$(ME): Constants in src/stat.c should be 4 or 8' \
 795                       'upper-case chars' 1>&2; exit 1; } || :
 796
 797 # Ensure gnulib generated files are ignored
 798 # TODO: Perhaps augment gnulib-tool to do this in lib/.gitignore?
 799 sc_gitignore_missing:
 800         @{ sed -n '/^\/lib\/.*\.h$$/{p;p}' $(srcdir)/.gitignore;        \
 801             find lib -name '*.in*' ! -name '*~' ! -name 'sys_*' |       \
 802               sed 's|^|/|; s|_\(.*in\.h\)|/\1|; s/\.in//'; } |          \
 803               sort | uniq -u | grep . && { echo '$(ME): Add above'      \
 804                 'entries to .gitignore' >&2; exit 1; } || :
 805
 806 # Flag redundant entries in .gitignore
 807 # Disabled for now as too aggressive flagging
 808 # entries like /lib/arg-nonnull.h
 809 #sc_gitignore_redundant:
 810 #       @{ grep ^/lib $(srcdir)/.gitignore;                             \
 811 #          sed 's|^|/lib|' $(srcdir)/lib/.gitignore; } |                \
 812 #           sort | uniq -d | grep . && { echo '$(ME): Remove above'     \
 813 #             'entries from .gitignore' >&2; exit 1; } || :
 814
 815 sc_prohibit-form-feed:
 816         @prohibit=$$'\f' \
 817         in_vc_files='\.[chly]$$' \
 818         halt='Form Feed (^L) detected' \
 819           $(_sc_search_regexp)
 820
 821 # Override the default Cc: used in generating an announcement.
 822 announcement_Cc_ = $(translation_project_), \
 823   coreutils@gnu.org, coreutils-announce@gnu.org
 824
 825 -include $(srcdir)/dist-check.mk
 826
 827 update-copyright-env = \
 828   UPDATE_COPYRIGHT_FORCE=1 \
 829   UPDATE_COPYRIGHT_USE_INTERVALS=2 \
 830   UPDATE_COPYRIGHT_MAX_LINE_LENGTH=79
 831
 832 # List syntax-check exemptions.
 833 exclude_file_name_regexp--sc_space_tab = \
 834   ^(tests/pr/|tests/misc/nl\.sh$$|gl/.*\.diff$$|man/help2man$$)
 835 exclude_file_name_regexp--sc_bindtextdomain = \
 836   ^(gl/.*|lib/euidaccess-stat|src/make-prime-list)\.c$$
 837 exclude_file_name_regexp--sc_trailing_blank = \
 838   ^(tests/pr/|gl/.*\.diff$$|man/help2man)
 839 exclude_file_name_regexp--sc_system_h_headers = \
 840   ^src/((die|system|copy)\.h|make-prime-list\.c)$$
 841
 842 _src = (false|lbracket|ls-(dir|ls|vdir)|tac-pipe|uname-(arch|uname))
 843 _gl_src = (xdecto.max|cl-strtold)
 844 exclude_file_name_regexp--sc_require_config_h_first = \
 845   (^lib/buffer-lcm\.c|gl/lib/$(_gl_src)\.c|src/$(_src)\.c)$$
 846 exclude_file_name_regexp--sc_require_config_h = \
 847   $(exclude_file_name_regexp--sc_require_config_h_first)
 848
 849 exclude_file_name_regexp--sc_po_check = ^(gl/|man/help2man)
 850 exclude_file_name_regexp--sc_prohibit_always-defined_macros = \
 851   ^src/(seq|remove)\.c$$
 852 exclude_file_name_regexp--sc_prohibit_empty_lines_at_EOF = ^tests/pr/
 853 exclude_file_name_regexp--sc_program_name = \
 854   ^(gl/.*|lib/euidaccess-stat|src/make-prime-list)\.c$$
 855 exclude_file_name_regexp--sc_file_system = \
 856   NEWS|^(init\.cfg|src/df\.c|tests/df/df-P\.sh|tests/df/df-output\.sh)$$
 857 exclude_file_name_regexp--sc_prohibit_always_true_header_tests = \
 858   ^m4/stat-prog\.m4$$
 859 exclude_file_name_regexp--sc_prohibit_fail_0 = \
 860   (^.*/git-hooks/commit-msg|^tests/init\.sh|Makefile\.am|\.mk|.*\.texi)$$
 861 exclude_file_name_regexp--sc_prohibit_test_minus_ao = *\.texi$$
 862 exclude_file_name_regexp--sc_prohibit_atoi_atof = ^lib/euidaccess-stat\.c$$
 863
 864 # longlong.h is maintained elsewhere.
 865 _ll = ^src/longlong\.h$$
 866 exclude_file_name_regexp--sc_useless_cpp_parens = $(_ll)
 867 exclude_file_name_regexp--sc_space_before_open_paren = $(_ll)
 868
 869 tbi_1 = ^tests/pr/|(\.mk|^man/help2man)$$
 870 tbi_2 = ^scripts/git-hooks/(pre-commit|pre-applypatch|applypatch-msg)$$
 871 tbi_3 = (GNU)?[Mm]akefile(\.am)?$$|$(_ll)
 872 exclude_file_name_regexp--sc_prohibit_tab_based_indentation = \
 873   $(tbi_1)|$(tbi_2)|$(tbi_3)
 874
 875 exclude_file_name_regexp--sc_preprocessor_indentation = \
 876   ^(gl/lib/rand-isaac\.[ch]|gl/tests/test-rand-isaac\.c)$$|$(_ll)
 877 exclude_file_name_regexp--sc_prohibit_stat_st_blocks = \
 878   ^(src/system\.h|tests/du/2g\.sh)$$
 879
 880 exclude_file_name_regexp--sc_prohibit_continued_string_alpha_in_column_1 = \
 881   ^src/(system\.h|od\.c|printf\.c|getlimits\.c)$$
 882
 883 exclude_file_name_regexp--sc_prohibit_test_backticks = \
 884   ^tests/(local\.mk|(init|misc/stdbuf|factor/create-test)\.sh)$$
 885
 886 # Exempt test.c, since it's nominally shared, and relatively static.
 887 exclude_file_name_regexp--sc_prohibit_operator_at_end_of_line = \
 888   ^src/(ptx|test|head)\.c$$
 889
 890 exclude_file_name_regexp--sc_error_message_uppercase = ^src/factor\.c$$
 891 exclude_file_name_regexp--sc_prohibit_atoi_atof = ^src/make-prime-list\.c$$
 892
 893 # Exception here as we don't want __attribute elided on non GCC
 894 exclude_file_name_regexp--sc_prohibit-gl-attributes = ^src/libstdbuf\.c$$
 895
 896 exclude_file_name_regexp--sc_prohibit_uppercase_id_est = \.diff$$
 897 exclude_file_name_regexp--sc_ensure_dblspace_after_dot_before_id_est = \.diff$$
 898 exclude_file_name_regexp--sc_ensure_comma_after_id_est = \.diff|$(_ll)$$
 899 exclude_file_name_regexp--sc_long_lines = \.diff$$|$(_ll)
 900
 901 # Augment AM_CFLAGS to include our per-directory options:
 902 AM_CFLAGS += $($(@D)_CFLAGS)
 903
 904 src_CFLAGS = $(WARN_CFLAGS)
 905 lib_CFLAGS = $(GNULIB_WARN_CFLAGS)
 906 gnulib-tests_CFLAGS = $(GNULIB_TEST_WARN_CFLAGS)
 907
 908 # Configuration to make the tight-scope syntax-check rule work with
 909 # non-recursive make.
 910 # Note _gl_TS_headers use _single line_ extern function declarations,
 911 # while *_SOURCES use the _two line_ form.
 912 export _gl_TS_headers = $(noinst_HEADERS)
 913 # Add exceptions for --enable-single-binary renamed functions.
 914 _gl_TS_unmarked_extern_functions = main usage
 915 _gl_TS_unmarked_extern_functions += single_binary_main_.* _usage_.*
 916 # Headers to search for single line extern _data_ declarations.
 917 _gl_TS_other_headers = $(srcdir)/src/*.h src/*.h
 918 # Tell the tight_scope rule about an exceptional "extern" variable.
 919 # Normally, the rule would detect its declaration, but that uses a
 920 # different name, __clz_tab.
 921 _gl_TS_unmarked_extern_vars = factor_clz_tab
 922 # Other tight_scope settings
 923 _gl_TS_dir = .
 924 _gl_TS_obj_files = src/*.$(OBJEXT)