cfg.mk

   1 # Customize maint.mk                           -*- makefile -*-
   2 # Copyright (C) 2003-2012 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 <http://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 = http://ftp.gnu.org/gnu/$(PACKAGE)
  23
  24 # Tests not to run as part of "make distcheck".
  25 local-checks-to-skip =
  26
  27 # Tools used to bootstrap this package, used for "announcement".
  28 bootstrap-tools = autoconf,automake,gnulib,bison
  29
  30 # Now that we have better tests, make this the default.
  31 export VERBOSE = yes
  32
  33 # Comparing tarball sizes compressed using different xz presets, we see that
  34 # an -8e-compressed tarball is only 9KiB larger than the -9e-compressed one.
  35 # Using -8e is preferred, since that lets the decompression process use half
  36 # the memory (32MiB rather than 64MiB).
  37 # $ for i in {7,8,9}{e,}; do \
  38 #     (n=$(xz -$i < coreutils-8.15*.tar|wc -c);echo $n $i) & done |sort -nr
  39 # 5129388 7
  40 # 5036524 7e
  41 # 5017476 8
  42 # 5010604 9
  43 # 4923016 8e
  44 # 4914152 9e
  45 export XZ_OPT = -8e
  46
  47 old_NEWS_hash = a99128b9985b2e76bdcabf3e5d95ca1a
  48
  49 # Add an exemption for sc_makefile_at_at_check.
  50 _makefile_at_at_check_exceptions = ' && !/^cu_install_program =/'
  51
  52 # Our help-version script is in a slightly different location.
  53 _hv_file ?= $(srcdir)/tests/misc/help-version
  54
  55 # Ensure that the list of O_ symbols used to compute O_FULLBLOCK is complete.
  56 dd = $(srcdir)/src/dd.c
  57 sc_dd_O_FLAGS:
  58         @rm -f $@.1 $@.2
  59         @{ echo O_FULLBLOCK; echo O_NOCACHE;                            \
  60           perl -nle '/^ +\| (O_\w*)$$/ and print $$1' $(dd); } | sort > $@.1
  61         @{ echo O_NOFOLLOW; perl -nle '/{"[a-z]+",\s*(O_\w+)},/ and print $$1' \
  62           $(dd); } | sort > $@.2
  63         @diff -u $@.1 $@.2 || diff=1 || diff=;                          \
  64         rm -f $@.1 $@.2;                                                \
  65         test "$$diff"                                                   \
  66           && { echo '$(ME): $(dd) has inconsistent O_ flag lists'>&2;   \
  67                exit 1; } || :
  68
  69 # Ensure that dd's definition of LONGEST_SYMBOL stays in sync
  70 # with the strings from the two affected variables.
  71 dd_c = $(srcdir)/src/dd.c
  72 sc_dd_max_sym_length:
  73 ifneq ($(wildcard $(dd_c)),)
  74         @len=$$( (sed -n '/conversions\[\] =$$/,/^};/p' $(dd_c);\
  75                  sed -n '/flags\[\] =$$/,/^};/p' $(dd_c) )      \
  76                 |sed -n '/"/s/^[^"]*"\([^"]*\)".*/\1/p'         \
  77               | wc --max-line-length);                          \
  78         max=$$(sed -n '/^#define LONGEST_SYMBOL /s///p' $(dd_c) \
  79               |tr -d '"' | wc --max-line-length);               \
  80         if test "$$len" = "$$max"; then :; else                 \
  81           echo 'dd.c: LONGEST_SYMBOL is not longest' 1>&2;      \
  82           exit 1;                                               \
  83         fi
  84 endif
  85
  86 # Many m4 macros names once began with 'jm_'.
  87 # On 2004-04-13, they were all changed to start with gl_ instead.
  88 # Make sure that none are inadvertently reintroduced.
  89 sc_prohibit_jm_in_m4:
  90         @grep -nE 'jm_[A-Z]'                                            \
  91                 $$($(VC_LIST) m4 |grep '\.m4$$'; echo /dev/null) &&     \
  92             { echo '$(ME): do not use jm_ in m4 macro names'            \
  93               1>&2; exit 1; } || :
  94
  95 # Ensure that each root-requiring test is run via the "check-root" rule.
  96 sc_root_tests:
  97         @if test -d tests \
  98               && grep check-root tests/Makefile.am>/dev/null 2>&1; then \
  99         t1=sc-root.expected; t2=sc-root.actual;                         \
 100         grep -nl '^ *require_root_$$'                                   \
 101           $$($(VC_LIST) tests) |sed s,tests/,, |sort > $$t1;            \
 102         sed -n '/^root_tests =[  ]*\\$$/,/[^\]$$/p'                     \
 103           $(srcdir)/tests/Makefile.am                                   \
 104             | sed 's/^  *//;/^root_tests =/d'                           \
 105             | tr -s '\012\\' '  ' | fmt -1 | sort > $$t2;               \
 106         diff -u $$t1 $$t2 || diff=1 || diff=;                           \
 107         rm -f $$t1 $$t2;                                                \
 108         test "$$diff"                                                   \
 109           && { echo 'tests/Makefile.am: missing check-root action'>&2;  \
 110                exit 1; } || :;                                          \
 111         fi
 112
 113 # Create a list of regular expressions matching the names
 114 # of files included from system.h.  Exclude a couple.
 115 .re-list:
 116         @sed -n '/^# *include /s///p' $(srcdir)/src/system.h \
 117           | grep -Ev 'sys/(param|file)\.h' \
 118           | sed 's/ .*//;;s/^["<]/^# *include [<"]/;s/\.h[">]$$/\\.h[">]/' \
 119           > $@-t
 120         @mv $@-t $@
 121
 122 define gl_trap_
 123   Exit () { set +e; (exit $$1); exit $$1; };                            \
 124   for sig in 1 2 3 13 15; do                                            \
 125     eval "trap 'Exit $$(expr $$sig + 128)' $$sig";                      \
 126   done
 127 endef
 128
 129 # Files in src/ should not include directly any of
 130 # the headers already included via system.h.
 131 sc_system_h_headers: .re-list
 132         @if test -f $(srcdir)/src/system.h; then                        \
 133           trap 'rc=$$?; rm -f .re-list; exit $$rc' 0;                   \
 134           $(gl_trap_);                                                  \
 135           grep -nE -f .re-list                                          \
 136               $$($(VC_LIST_EXCEPT) | grep '^\($(srcdir)/\)\?src/')      \
 137             && { echo '$(ME): the above are already included via system.h'\
 138                   1>&2;  exit 1; } || :;                                \
 139         fi
 140
 141 sc_sun_os_names:
 142         @grep -nEi \
 143             'solaris[^[:alnum:]]*2\.(7|8|9|[1-9][0-9])|sunos[^[:alnum:]][6-9]' \
 144             $$($(VC_LIST_EXCEPT)) &&                                    \
 145           { echo '$(ME): found misuse of Sun OS version numbers' 1>&2;  \
 146             exit 1; } || :
 147
 148 ALL_RECURSIVE_TARGETS += sc_check-AUTHORS
 149 sc_check-AUTHORS:
 150         @$(MAKE) -s -C src _sc_check-AUTHORS
 151
 152 # Look for lines longer than 80 characters, except omit:
 153 # - program-generated long lines in diff headers,
 154 # - tests involving long checksum lines, and
 155 # - the 'pr' test cases.
 156 LINE_LEN_MAX = 80
 157 FILTER_LONG_LINES =                                             \
 158   /^[^:]*\.diff:[^:]*:@@ / d;                                   \
 159   \|^[^:]*tests/misc/sha[0-9]*sum.*\.pl[-:]| d;                 \
 160   \|^[^:]*tests/pr/|{ \|^[^:]*tests/pr/pr-tests:| !d; };
 161 sc_long_lines:
 162         @files=$$($(VC_LIST_EXCEPT))                                    \
 163         halt='line(s) with more than $(LINE_LEN_MAX) characters; reindent'; \
 164         for file in $$files; do                                         \
 165           expand $$file | grep -nE '^.{$(LINE_LEN_MAX)}.' |             \
 166           sed -e "s|^|$$file:|" -e '$(FILTER_LONG_LINES)';              \
 167         done | grep . && { msg="$$halt" $(_sc_say_and_exit) } || :
 168
 169 # Option descriptions should not start with a capital letter.
 170 # One could grep source directly as follows:
 171 # grep -E " {2,6}-.*[^.]  [A-Z][a-z]" $$($(VC_LIST_EXCEPT) | grep '\.c$$')
 172 # but that would miss descriptions not on the same line as the -option.
 173 ALL_RECURSIVE_TARGETS += sc_option_desc_uppercase
 174 .PHONY: sc_option_desc_uppercase
 175 sc_option_desc_uppercase:
 176         @grep '^\\fB\\-' -A1 *.1 | LC_ALL=C grep '\.1.[A-Z][a-z]' && \
 177             { echo 1>&2 '$@: found initial capitals in --help';   \
 178               exit 1; } || :;
 179 sc_option_desc_uppercase: $(dist_man1_MANS) \
 180                           $(patsubst %,man/%.1,$(NO_INSTALL_PROGS_DEFAULT)) \
 181                           all_programs
 182
 183 # Ensure all man/*.[1x] files are present.
 184 ALL_RECURSIVE_TARGETS += sc_man_file_correlation
 185 .PHONY: sc_man_file_correlation
 186 sc_man_file_correlation: check-x-vs-1 check-programs-vs-x
 187
 188 # Ensure that for each .x file in the 'man/' subdirectory, there is a
 189 # corresponding .1 file in the definition of $(dist_man1_MANS).
 190 # But since that expansion usually lacks programs like arch and hostname,
 191 # add them here manually.
 192 .PHONY: check-x-vs-1
 193 check-x-vs-1:
 194         @PATH=./src$(PATH_SEPARATOR)$$PATH; export PATH;                \
 195         t=$@-t;                                                         \
 196         (cd $(srcdir)/man && ls -1 *.x)                                 \
 197           | sed 's/\.x$$//' | $(ASSORT) > $$t;                          \
 198         (echo $(patsubst man/%,%,$(dist_man1_MANS))                     \
 199               $(NO_INSTALL_PROGS_DEFAULT)                               \
 200           | tr -s ' ' '\n' | sed 's/\.1$$//')                           \
 201           | $(ASSORT) -u | diff - $$t || { rm $$t; exit 1; };           \
 202         rm $$t
 203
 204 all_programs =                                                          \
 205       (cd ./src && MAKEFLAGS= $(MAKE) -s all_programs.list)             \
 206        | grep -v '\['
 207
 208 # Ensure that for each .x file in the 'man/' subdirectory, there is a
 209 # corresponding coreutils program.
 210 .PHONY: check-programs-vs-x
 211 check-programs-vs-x: all_programs
 212         @status=0;                                      \
 213         for p in dummy `$(all_programs)`; do            \
 214           test $$p = dummy && continue;                 \
 215           test $$p = ginstall && p=install || : ;       \
 216           test -f $(srcdir)/man/$$p.x                   \
 217             || { echo missing $$p.x 1>&2; status=1; };  \
 218         done;                                           \
 219         exit $$status
 220
 221 # Ensure that the end of each release's section is marked by two empty lines.
 222 sc_NEWS_two_empty_lines:
 223         @sed -n 4,/Noteworthy/p $(srcdir)/NEWS                          \
 224             | perl -n0e '/(^|\n)\n\n\* Noteworthy/ or exit 1'           \
 225           || { echo '$(ME): use two empty lines to separate NEWS sections' \
 226                  1>&2; exit 1; } || :
 227
 228 # Perl-based tests used to exec perl from a #!/bin/sh script.
 229 # Now they all start with #!/usr/bin/perl and the portability
 230 # infrastructure is in tests/Makefile.am.  Make sure no old-style
 231 # script sneaks back in.
 232 sc_no_exec_perl_coreutils:
 233         @if test -f $(srcdir)/tests/Coreutils.pm; then                  \
 234           grep '^exec  *\$$PERL.*MCoreutils' $$($(VC_LIST) tests) &&    \
 235             { echo 1>&2 '$(ME): found anachronistic Perl-based tests';  \
 236               exit 1; } || :;                                           \
 237         fi
 238
 239 # With split lines, don't leave an operator at end of line.
 240 # Instead, put it on the following line, where it is more apparent.
 241 # Don't bother checking for "*" at end of line, since it provokes
 242 # far too many false positives, matching constructs like "TYPE *".
 243 # Similarly, omit "=" (initializers).
 244 binop_re_ ?= [-/+^!<>]|[-/+*^!<>=]=|&&?|\|\|?|<<=?|>>=?
 245 sc_prohibit_operator_at_end_of_line:
 246         @prohibit='. ($(binop_re_))$$'                                  \
 247         in_vc_files='\.[chly]$$'                                        \
 248         halt='found operator at end of line'                            \
 249           $(_sc_search_regexp)
 250
 251 # Don't use "readlink" or "readlinkat" directly
 252 sc_prohibit_readlink:
 253         @prohibit='\<readlink(at)? \('                                  \
 254         halt='do not use readlink(at); use via xreadlink or areadlink*' \
 255           $(_sc_search_regexp)
 256
 257 # Don't use address of "stat" or "lstat" functions
 258 sc_prohibit_stat_macro_address:
 259         @prohibit='\<l?stat '':|&l?stat\>'                              \
 260         halt='stat() and lstat() may be function-like macros'           \
 261           $(_sc_search_regexp)
 262
 263 # Ensure that date's --help output stays in sync with the info
 264 # documentation for GNU strftime.  The only exception is %N,
 265 # which date accepts but GNU strftime does not.
 266 extract_char = sed 's/^[^%][^%]*%\(.\).*/\1/'
 267 sc_strftime_check:
 268         @if test -f $(srcdir)/src/date.c; then                          \
 269           grep '^  %.  ' $(srcdir)/src/date.c | sort                    \
 270             | $(extract_char) > $@-src;                                 \
 271           { echo N;                                                     \
 272             info libc date calendar format 2>/dev/null|grep '^    `%.'\'\
 273               | $(extract_char); } | sort > $@-info;                    \
 274           if test $$(stat --format %s $@-info) != 2; then               \
 275             diff -u $@-src $@-info || exit 1;                           \
 276           else                                                          \
 277             echo '$(ME): skipping $@: libc info not installed' 1>&2;    \
 278           fi;                                                           \
 279           rm -f $@-src $@-info;                                         \
 280         fi
 281
 282 # Indent only with spaces.
 283 sc_prohibit_tab_based_indentation:
 284         @prohibit='^ *  '                                               \
 285         halt='TAB in indentation; use only spaces'                      \
 286           $(_sc_search_regexp)
 287
 288 # The SEE ALSO section of a man page should not be terminated with
 289 # a period.  Check the first line after each "SEE ALSO" line in man/*.x:
 290 sc_prohibit_man_see_also_period:
 291         @grep -nB1 '\.$$' $$($(VC_LIST_EXCEPT) | grep 'man/.*\.x$$')    \
 292             | grep -A1 -e '-\[SEE ALSO\]' | grep '\.$$' &&              \
 293           { echo '$(ME): do not end "SEE ALSO" section with a period'   \
 294               1>&2; exit 1; } || :
 295
 296 # Don't use "indent-tabs-mode: nil" anymore.  No longer needed.
 297 sc_prohibit_emacs__indent_tabs_mode__setting:
 298         @prohibit='^( *[*#] *)?indent-tabs-mode:'                       \
 299         halt='use of emacs indent-tabs-mode: setting'                   \
 300           $(_sc_search_regexp)
 301
 302 # Ensure that tests don't include a redundant fail=0.
 303 sc_prohibit_fail_0:
 304         @prohibit='\<fail=0\>'                                          \
 305         halt='fail=0 initialization'                                    \
 306           $(_sc_search_regexp)
 307
 308 # The mode part of a setfacl -m option argument must be three bytes long.
 309 # I.e., an argument of user:bin:rw or user:bin:r will make Solaris 10's
 310 # setfacl reject it with: "Unrecognized character found in mode field".
 311 # Use hyphens to give it a length of 3: "...:rw-" or "...:r--".
 312 sc_prohibit_short_facl_mode_spec:
 313         @prohibit='\<setfacl .*-m.*:.*:[rwx-]{1,2} '                    \
 314         halt='setfacl mode string length < 3; extend with hyphen(s)'    \
 315           $(_sc_search_regexp)
 316
 317 # Ensure that "stdio--.h" is used where appropriate.
 318 sc_require_stdio_safer:
 319         @if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then    \
 320           files=$$(grep -l '\bfreopen \?(' $$($(VC_LIST_EXCEPT)         \
 321               | grep '\.[ch]$$'));                                      \
 322           test -n "$$files" && grep -LE 'include "stdio--.h"' $$files   \
 323               | grep . &&                                               \
 324           { echo '$(ME): the above files should use "stdio--.h"'        \
 325                 1>&2; exit 1; } || :;                                   \
 326         else :;                                                         \
 327         fi
 328
 329 sc_prohibit_perl_hash_quotes:
 330         @prohibit="\{'[A-Z_]+' *[=}]"                                   \
 331         halt="in Perl code, write \$$hash{KEY}, not \$$hash{'K''EY'}"   \
 332           $(_sc_search_regexp)
 333
 334 # Prefer xnanosleep over other less-precise sleep methods
 335 sc_prohibit_sleep:
 336         @prohibit='\<(nano|u)?sleep \('                                 \
 337         halt='prefer xnanosleep over other sleep interfaces'            \
 338           $(_sc_search_regexp)
 339
 340 # Use print_ver_ (from init.cfg), not open-coded $VERBOSE check.
 341 sc_prohibit_verbose_version:
 342         @prohibit='test "\$$VERBOSE" = yes && .* --version'             \
 343         halt='use the print_ver_ function instead...'                   \
 344           $(_sc_search_regexp)
 345
 346 # Use framework_failure_, not the old name without the trailing underscore.
 347 sc_prohibit_framework_failure:
 348         @prohibit='\<framework_''failure\>'                             \
 349         halt='use framework_failure_ instead'                           \
 350           $(_sc_search_regexp)
 351
 352 # Prohibit the use of `...` in tests/.  Use $(...) instead.
 353 sc_prohibit_test_backticks:
 354         @prohibit='`' in_vc_files='^tests/'                             \
 355         halt='use $$(...), not `...` in tests/'                         \
 356           $(_sc_search_regexp)
 357
 358 # Programs like sort, ls, expr use PROG_FAILURE in place of EXIT_FAILURE.
 359 # Others, use the EXIT_CANCELED, EXIT_ENOENT, etc. macros defined in system.h.
 360 # In those programs, ensure that EXIT_FAILURE is not used by mistake.
 361 sc_some_programs_must_avoid_exit_failure:
 362         @grep -nw EXIT_FAILURE                                          \
 363             $$(git grep -El '[^T]_FAILURE|EXIT_CANCELED' src)           \
 364           | grep -vE '= EXIT_FAILURE|exit \(.* \?' | grep .             \
 365             && { echo '$(ME): do not use EXIT_FAILURE in the above'     \
 366                   1>&2; exit 1; } || :
 367
 368 # Ensure that tests call the print_ver_ function for programs which are
 369 # actually used in that test.
 370 sc_prohibit_test_calls_print_ver_with_irrelevant_argument:
 371         @git grep -w print_ver_ tests                                   \
 372           | sed 's#:print_ver_##'                                       \
 373           | { fail=0;                                                   \
 374               while read file name; do                                  \
 375                 for i in $$name; do                                     \
 376                   case "$$i" in install) i=ginstall;; esac;             \
 377                   grep -w "$$i" $$file|grep -vw print_ver_|grep -q .    \
 378                     || { fail=1;                                        \
 379                          echo "*** Test: $$file, offending: $$i." 1>&2; };\
 380                 done;                                                   \
 381               done;                                                     \
 382               test $$fail = 0 || exit 1;                                \
 383             } || { echo "$(ME): the above test(s) call print_ver_ for"  \
 384                     "program(s) they don't use" 1>&2; exit 1; }
 385
 386 # Exempt the contents of any usage function from the following.
 387 _continued_string_col_1 = \
 388 s/^usage .*?\n}//ms;/\\\n\w/ and print ("$$ARGV\n"),$$e=1;END{$$e||=0;exit $$e}
 389 # Ding any source file that has a continued string with an alphabetic in the
 390 # first column of the following line.  We prohibit them because they usually
 391 # trigger false positives in tools that try to map an arbitrary line number
 392 # to the enclosing function name.  Of course, very many strings do precisely
 393 # this, *when they are part of the usage function*.  That is why we exempt
 394 # the contents of any function named "usage".
 395 sc_prohibit_continued_string_alpha_in_column_1:
 396         @perl -0777 -ne '$(_continued_string_col_1)' \
 397             $$($(VC_LIST_EXCEPT) | grep '\.[ch]$$') \
 398           || { echo '$(ME): continued string with word in first column' \
 399                 1>&2; exit 1; } || :
 400 # Use this to list offending lines:
 401 # git ls-files |grep '\.[ch]$' | xargs \
 402 #   perl -n -0777 -e 's/^usage.*?\n}//ms;/\\\n\w/ and print "$ARGV\n"' \
 403 #     | xargs grep -A1 '\\$'|grep '\.[ch][:-][_a-zA-Z]'
 404
 405
 406 ###########################################################
 407 _p0 = \([^"'/]\|"\([^\"]\|[\].\)*"\|'\([^\']\|[\].\)*'
 408 _pre = $(_p0)\|[/][^"'/*]\|[/]"\([^\"]\|[\].\)*"\|[/]'\([^\']\|[\].\)*'\)*
 409 _pre_anchored = ^\($(_pre)\)
 410 _comment_and_close = [^*]\|[*][^/*]\)*[*][*]*/
 411 # help font-lock mode: '
 412
 413 # A sed expression that removes ANSI C and ISO C99 comments.
 414 # Derived from the one in GNU gettext's 'moopp' preprocessor.
 415 _sed_remove_comments =                                  \
 416 /[/][/*]/{                                              \
 417   ta;                                                   \
 418   :a;                                                   \
 419   s,$(_pre_anchored)//.*,\1,;                           \
 420   te;                                                   \
 421   s,$(_pre_anchored)/[*]\($(_comment_and_close),\1 ,;   \
 422   ta;                                                   \
 423   /^$(_pre)[/][*]/{                                     \
 424     s,$(_pre_anchored)/[*].*,\1 ,;                      \
 425     tu;                                                 \
 426     :u;                                                 \
 427     n;                                                  \
 428     s,^\($(_comment_and_close),,;                       \
 429     tv;                                                 \
 430     s,^.*$$,,;                                          \
 431     bu;                                                 \
 432     :v;                                                 \
 433   };                                                    \
 434   :e;                                                   \
 435 }
 436 # Quote all single quotes.
 437 _sed_rm_comments_q = $(subst ','\'',$(_sed_remove_comments))
 438 # help font-lock mode: '
 439
 440 _space_before_paren_exempt =? \\n\\$$
 441 _space_before_paren_exempt = \
 442   (^ *\#|\\n\\$$|%s\(to %s|(date|group|character)\(s\))
 443 # Ensure that there is a space before each open parenthesis in C code.
 444 sc_space_before_open_paren:
 445         @if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then    \
 446           fail=0;                                                       \
 447           for c in $$($(VC_LIST_EXCEPT) | grep '\.[ch]$$'); do          \
 448             sed '$(_sed_rm_comments_q)' $$c 2>/dev/null                 \
 449               | grep -i '[[:alnum:]]('                                  \
 450               | grep -vE '$(_space_before_paren_exempt)'                \
 451               | grep . && { fail=1; echo "*** $$c"; };                  \
 452           done;                                                         \
 453           test $$fail = 1 &&                                            \
 454             { echo '$(ME): the above files lack a space-before-open-paren' \
 455                 1>&2; exit 1; } || :;                                   \
 456         else :;                                                         \
 457         fi
 458
 459 # Similar to the gnulib maint.mk rule for sc_prohibit_strcmp
 460 # Use STREQ_LEN or STRPREFIX rather than comparing strncmp == 0, or != 0.
 461 sc_prohibit_strncmp:
 462         @grep -nE '! *str''ncmp *\(|\<str''ncmp *\(.+\) *[!=]='         \
 463             $$($(VC_LIST_EXCEPT))                                       \
 464           | grep -vE ':# *define STR(N?EQ_LEN|PREFIX)\(' &&             \
 465           { echo '$(ME): use STREQ_LEN or STRPREFIX instead of str''ncmp' \
 466                 1>&2; exit 1; } || :
 467
 468 # Enforce recommended preprocessor indentation style.
 469 sc_preprocessor_indentation:
 470         @if cppi --version >/dev/null 2>&1; then                        \
 471           $(VC_LIST_EXCEPT) | grep '\.[ch]$$' | xargs cppi -a -c        \
 472             || { echo '$(ME): incorrect preprocessor indentation' 1>&2; \
 473                 exit 1; };                                              \
 474         else                                                            \
 475           echo '$(ME): skipping test $@: cppi not installed' 1>&2;      \
 476         fi
 477
 478 # THANKS.in is a list of name/email pairs for people who are mentioned in
 479 # commit logs (and generated ChangeLog), but who are not also listed as an
 480 # author of a commit.  Name/email pairs of commit authors are automatically
 481 # extracted from the repository.  As a very minor factorization, when
 482 # someone who was initially listed only in THANKS.in later authors a commit,
 483 # this rule detects that their pair may now be removed from THANKS.in.
 484 sc_THANKS_in_duplicates:
 485         @{ git log --pretty=format:%aN | sort -u;                       \
 486             cut -b-36 THANKS.in | sed '/^$$/d;s/  *$$//'; }             \
 487           | sort | uniq -d | grep .                                     \
 488             && { echo '$(ME): remove the above names from THANKS.in'    \
 489                   1>&2; exit 1; } || :
 490
 491 # Override the default Cc: used in generating an announcement.
 492 announcement_Cc_ = $(translation_project_), \
 493   coreutils@gnu.org, coreutils-announce@gnu.org
 494
 495 -include $(srcdir)/dist-check.mk
 496
 497 update-copyright-env = \
 498   UPDATE_COPYRIGHT_FORCE=1 \
 499   UPDATE_COPYRIGHT_USE_INTERVALS=2 \
 500   UPDATE_COPYRIGHT_MAX_LINE_LENGTH=79
 501
 502 # List syntax-check exemptions.
 503 exclude_file_name_regexp--sc_space_tab = \
 504   ^(tests/pr/|tests/misc/nl\.sh$$|gl/.*\.diff$$)
 505 exclude_file_name_regexp--sc_bindtextdomain = ^(gl/.*|lib/euidaccess-stat)\.c$$
 506 exclude_file_name_regexp--sc_unmarked_diagnostics =    ^build-aux/cvsu$$
 507 exclude_file_name_regexp--sc_error_message_uppercase = ^build-aux/cvsu$$
 508 exclude_file_name_regexp--sc_trailing_blank = ^tests/pr/
 509 exclude_file_name_regexp--sc_system_h_headers = \
 510   ^src/((system|copy)\.h|libstdbuf\.c)$$
 511
 512 _src = (false|lbracket|ls-(dir|ls|vdir)|tac-pipe|uname-(arch|uname))
 513 exclude_file_name_regexp--sc_require_config_h_first = \
 514   (^lib/buffer-lcm\.c|src/$(_src)\.c)$$
 515 exclude_file_name_regexp--sc_require_config_h = \
 516   $(exclude_file_name_regexp--sc_require_config_h_first)
 517
 518 exclude_file_name_regexp--sc_po_check = ^gl/
 519 exclude_file_name_regexp--sc_prohibit_always-defined_macros = \
 520   ^src/(seq|remove)\.c$$
 521 exclude_file_name_regexp--sc_prohibit_empty_lines_at_EOF = ^tests/pr/
 522 exclude_file_name_regexp--sc_program_name = ^(gl/.*|lib/euidaccess-stat)\.c$$
 523 exclude_file_name_regexp--sc_file_system = \
 524   NEWS|^(tests/init\.cfg|src/df\.c|tests/df/df-P\.sh)$$
 525 exclude_file_name_regexp--sc_prohibit_always_true_header_tests = \
 526   ^m4/stat-prog\.m4$$
 527 exclude_file_name_regexp--sc_prohibit_fail_0 = \
 528   (^.*/git-hooks/commit-msg|^tests/init\.sh|Makefile\.am|\.mk|.*\.texi)$$
 529 exclude_file_name_regexp--sc_prohibit_atoi_atof = ^lib/euidaccess-stat\.c$$
 530
 531 tbi_1 = ^tests/pr/|(^gl/lib/reg.*\.c\.diff|Makefile(\.am)?|\.mk|^man/help2man)$$
 532 tbi_2 = ^scripts/git-hooks/(pre-commit|pre-applypatch|applypatch-msg)$$
 533 exclude_file_name_regexp--sc_prohibit_tab_based_indentation = \
 534   $(tbi_1)|$(tbi_2)
 535
 536 exclude_file_name_regexp--sc_preprocessor_indentation = \
 537   ^(gl/lib/rand-isaac\.[ch]|gl/tests/test-rand-isaac\.c)$$
 538 exclude_file_name_regexp--sc_prohibit_stat_st_blocks = \
 539   ^(src/system\.h|tests/du/2g\.sh)$$
 540
 541 exclude_file_name_regexp--sc_prohibit_continued_string_alpha_in_column_1 = \
 542   ^src/(system\.h|od\.c|printf\.c)$$
 543
 544 exclude_file_name_regexp--sc_prohibit_test_backticks = \
 545   ^tests/(init\.sh|Makefile\.am|misc/stdbuf\.sh)$$
 546
 547 # Exempt test.c, since it's nominally shared, and relatively static.
 548 exclude_file_name_regexp--sc_prohibit_operator_at_end_of_line = \
 549   ^src/(ptx|test|head)\.c$$