summaryrefslogtreecommitdiff
path: root/syntax-checks.mk
blob: 8f9d8b4c28564f193513cb7cadd47daddf54f584 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
# Maintainer checks for Automake.  Requires GNU make.

# Copyright (C) 2012-2013 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# We also have to take into account VPATH builds (where some generated
# tests might be in '$(builddir)' rather than in '$(srcdir)'), TAP-based
# tests script (which have a '.tap' extension) and helper scripts used
# by other test cases (which have a '.sh' extension).
xtests := $(shell \
  if test $(srcdir) = .; then \
     dirs=.; \
   else \
     dirs='$(srcdir) .'; \
   fi; \
   for d in $$dirs; do \
     for s in tap sh; do \
       ls $$d/t/ax/*.$$s $$d/t/*.$$s $$d/contrib/t/*.$$s 2>/dev/null; \
     done; \
   done | sort)

xdefs = \
  $(srcdir)/t/ax/am-test-lib.sh \
  $(srcdir)/t/ax/test-lib.sh \
  $(srcdir)/t/ax/test-defs.in

ams := $(shell find $(srcdir) -name '*.dir' -prune -o -name '*.am' -print)

# Some simple checks, and then ordinary check.  These are only really
# guaranteed to work on my machine.
syntax_check_rules = \
$(sc_tests_plain_check_rules) \
sc_diff_automake \
sc_diff_aclocal \
sc_no_brace_variable_expansions \
sc_rm_minus_f \
sc_no_for_variable_in_macro \
sc_mkinstalldirs \
sc_pre_normal_post_install_uninstall \
sc_perl_no_undef \
sc_perl_no_split_regex_space \
sc_cd_in_backquotes \
sc_cd_relative_dir \
sc_perl_at_uscore_in_scalar_context \
sc_perl_local \
sc_AMDEP_TRUE_in_automake_in \
sc_tests_make_without_am_makeflags \
$(sc_obsolete_requirements_rules) \
sc_tests_no_source_defs \
sc_tests_obsolete_variables \
sc_tests_here_document_format \
sc_tests_command_subst \
sc_tests_exit_not_Exit \
sc_tests_automake_fails \
sc_tests_required_after_defs \
sc_tests_overriding_macros_on_cmdline \
sc_tests_plain_sleep \
sc_tests_ls_t \
sc_tests_executable \
sc_m4_am_plain_egrep_fgrep \
sc_tests_no_configure_in \
sc_tests_PATH_SEPARATOR \
sc_tests_logs_duplicate_prefixes \
sc_tests_makefile_variable_order \
sc_perl_at_substs \
sc_unquoted_DESTDIR \
sc_tabs_in_texi \
sc_at_in_texi

## These check avoids accidental configure substitutions in the source.
## There are exactly 8 lines that should be modified from automake.in to
## automake, and 9 lines that should be modified from aclocal.in to
## aclocal.
automake_diff_no = 8
aclocal_diff_no = 9
sc_diff_automake sc_diff_aclocal: sc_diff_% :
	@set +e; tmp=$*-diffs.tmp; \
	 diff -u $(srcdir)/$*.in $* > $$tmp; test $$? -eq 1 || exit 1; \
	 added=`grep -v '^+++ ' $$tmp | grep -c '^+'` || exit 1; \
	 removed=`grep -v '^--- ' $$tmp | grep -c '^-'` || exit 1; \
	 test $$added,$$removed = $($*_diff_no),$($*_diff_no) \
	  || { \
	    echo "Found unexpected diffs between $*.in and $*"; \
	    echo "Lines added:   $$added"  ; \
	    echo "Lines removed: $$removed"; \
	    cat $$tmp >&2; \
	    exit 1; \
	  } >&1; \
	rm -f $$tmp

## Expect no instances of '${...}'.  However, $${...} is ok, since that
## is a shell construct, not a Makefile construct.
sc_no_brace_variable_expansions:
	@if grep -v '^ *#' $(ams) | grep -F '$${' | grep -F -v '$$$$'; then \
	  echo "Found too many uses of '\$${' in the lines above." 1>&2; \
	  exit 1; \
	else :; fi

## Make sure 'rm' is called with '-f'.
sc_rm_minus_f:
	@if grep -v '^#' $(ams) $(xtests) \
	   | grep -vE '/(spy-rm\.tap|subobj-clean.*-pr10697\.sh):' \
	   | grep -E '\<rm ([^-]|\-[^f ]*\>)'; \
	then \
	  echo "Suspicious 'rm' invocation." 1>&2; \
	  exit 1; \
	else :; fi

## Never use something like "for file in $(FILES)", this doesn't work
## if FILES is empty or if it contains shell meta characters (e.g. $ is
## commonly used in Java filenames).
sc_no_for_variable_in_macro:
	@if grep 'for .* in \$$(' $(ams) | grep -v '/Makefile\.am:'; then \
	  echo 'Use "list=$$(mumble); for var in $$$$list".' 1>&2 ; \
	  exit 1; \
	else :; fi

## Make sure all invocations of mkinstalldirs are correct.
sc_mkinstalldirs:
	@if grep -n 'mkinstalldirs' $(ams) \
	      | grep -F -v '$$(mkinstalldirs)' \
	      | grep -v '^\./Makefile.am:[0-9][0-9]*:  *lib/mkinstalldirs \\$$'; \
	then \
	  echo "Found incorrect use of mkinstalldirs in the lines above" 1>&2; \
	  exit 1; \
	else :; fi

## Make sure all calls to PRE/NORMAL/POST_INSTALL/UNINSTALL
sc_pre_normal_post_install_uninstall:
	@if grep -E -n '\((PRE|NORMAL|POST)_(|UN)INSTALL\)' $(ams) | \
	      grep -v ':##' | grep -v ':	@\$$('; then \
	  echo "Found incorrect use of PRE/NORMAL/POST_INSTALL/UNINSTALL in the lines above" 1>&2; \
	  exit 1; \
	else :; fi

## We never want to use "undef", only "delete", but for $/.
sc_perl_no_undef:
	@if grep -n -w 'undef ' $(srcdir)/automake.in | \
	      grep -F -v 'undef $$/'; then \
	  echo "Found undef in automake.in; use delete instead" 1>&2; \
	  exit 1; \
	fi

## We never want split (/ /,...), only split (' ', ...).
sc_perl_no_split_regex_space:
	@if grep -n 'split (/ /' $(srcdir)/automake.in; then \
	  echo "Found bad split in the lines above." 1>&2; \
	  exit 1; \
	fi

## Look for cd within backquotes
sc_cd_in_backquotes:
	@if grep -n '^[^#]*` *cd ' $(srcdir)/automake.in $(ams); then \
	  echo "Consider using \$$(am__cd) in the lines above." 1>&2; \
	  exit 1; \
	fi

## Look for cd to a relative directory (may be influenced by CDPATH).
## Skip some known directories that are OK.
sc_cd_relative_dir:
	@if grep -n '^[^#]*cd ' $(srcdir)/automake.in $(ams) | \
	      grep -v 'echo.*cd ' | \
	      grep -v 'am__cd =' | \
	      grep -v '^[^#]*cd [./]' | \
	      grep -v '^[^#]*cd \$$(top_builddir)' | \
	      grep -v '^[^#]*cd "\$$\$$am__cwd' | \
	      grep -v '^[^#]*cd \$$(abs' | \
	      grep -v '^[^#]*cd "\$$(DESTDIR)'; then \
	  echo "Consider using \$$(am__cd) in the lines above." 1>&2; \
	  exit 1; \
	fi

## Using @_ in a scalar context is most probably a programming error.
sc_perl_at_uscore_in_scalar_context:
	@if grep -Hn '[^@_A-Za-z0-9][_A-Za-z0-9]*[^) ] *= *@_' $(srcdir)/automake.in; then \
	  echo "Using @_ in a scalar context in the lines above." 1>&2; \
	  exit 1; \
	fi

## Allow only few variables to be localized in Automake.
sc_perl_local:
	@if egrep -v '^[ \t]*local \$$[_~]( *=|;)' $(srcdir)/automake.in | \
	        grep '^[ \t]*local [^*]'; then \
	  echo "Please avoid 'local'." 1>&2; \
	  exit 1; \
	fi

## Don't let AMDEP_TRUE substitution appear in automake.in.
sc_AMDEP_TRUE_in_automake_in:
	@if grep '@AMDEP''_TRUE@' $(srcdir)/automake.in; then \
	  echo "Don't put AMDEP_TRUE substitution in automake.in" 1>&2; \
	  exit 1; \
	fi

## Recursive make invocations should always pass $(AM_MAKEFLAGS)
## to $(MAKE), for portability to non-GNU make.
sc_tests_make_without_am_makeflags:
	@if grep '^[^#].*(MAKE) ' $(ams) $(srcdir)/automake.in \
	    | grep -v 'AM_MAKEFLAGS' \
	    | grep -v '/am/header-vars\.am:.*am--echo.*| $$(MAKE) -f *-'; \
	then \
	  echo 'Use $$(MAKE) $$(AM_MAKEFLAGS).' 1>&2; \
	  exit 1; \
	fi

## Look out for some obsolete variables.
sc_tests_obsolete_variables:
	@vars=" \
	  using_tap \
	  am_using_tap \
	  test_prefer_config_shell \
	  original_AUTOMAKE \
	  original_ACLOCAL \
	  parallel_tests \
	  am_parallel_tests \
	"; \
	seen=""; \
	for v in $$vars; do \
	  if grep -E "\b$$v\b" $(xtests) $(xdefs); then \
	    seen="$$seen $$v"; \
	  fi; \
	done; \
	if test -n "$$seen"; then \
	  for v in $$seen; do \
	    case $$v in \
	      parallel_tests|am_parallel_tests) v2=am_serial_tests;; \
	      *) v2=am_$$v;; \
	    esac; \
	    echo "Variable '$$v' is obsolete, use '$$v2' instead." 1>&2; \
	  done; \
	  exit 1; \
	else :; fi

## Look out for obsolete requirements specified in the test cases.
sc_obsolete_requirements_rules = sc_no_texi2dvi-o sc_no_makeinfo-html
modern-requirement.texi2dvi-o = texi2dvi
modern-requirement.makeinfo-html = makeinfo

$(sc_obsolete_requirements_rules): sc_no_% :
	@if grep -E 'required=.*\b$*\b' $(xtests); then \
	  echo "Requirement '$*' is obsolete and shouldn't" \
	       "be used anymore." >&2; \
	  echo "You should use '$(modern-requirement.$*)' instead." >&2; \
	  exit 1; \
	fi

## Tests should never call some programs directly, but only through the
## corresponding variable (e.g., '$MAKE', not 'make').  This will allow
## the programs to be overridden at configure time (for less brittleness)
## or by the user at make time (to allow better testsuite coverage).
sc_tests_plain_check_rules = \
  sc_tests_plain_egrep \
  sc_tests_plain_fgrep \
  sc_tests_plain_make \
  sc_tests_plain_perl \
  sc_tests_plain_automake \
  sc_tests_plain_aclocal \
  sc_tests_plain_autoconf \
  sc_tests_plain_autoupdate \
  sc_tests_plain_autom4te \
  sc_tests_plain_autoheader \
  sc_tests_plain_autoreconf

toupper = $(shell echo $(1) | LC_ALL=C tr '[a-z]' '[A-Z]')

$(sc_tests_plain_check_rules): sc_tests_plain_% :
	@# The leading ':' in the grep below is what is printed by the
	@# preceding 'grep -v' after the file name.
	@# It works here as a poor man's substitute for beginning-of-line
	@# marker.
	@if grep -v '^[ 	]*#' $(xtests) \
	   | $(EGREP) '(:|\bif|\bnot|[;!{\|\(]|&&|\|\|)[ 	]*?$*\b'; \
	 then \
	   echo 'Do not run "$*" in the above tests.' \
	        'Use "$$$(call toupper,$*)" instead.' 1>&2; \
	   exit 1; \
	fi

## Tests should only use END and EOF for here documents
## (so that the next test is effective).
sc_tests_here_document_format:
	@if grep '<<' $(xtests) | grep -Ev '\b(END|EOF)\b|\bcout <<'; then \
	  echo 'Use here documents with "END" and "EOF" only, for greppability.' 1>&2; \
	  exit 1; \
	fi

## Our test case should use the $(...) POSIX form for command substitution,
## rather than the older `...` form.
## The point of ignoring text on here-documents is that we want to exempt
## Makefile.am rules, configure.ac code and helper shell script created and
## used by out shell scripts, because Autoconf (as of version 2.69) does not
## yet ensure that $CONFIG_SHELL will be set to a proper POSIX shell.
sc_tests_command_subst:
	@found=false; \
	scan () { \
	  sed -n -e '/^#/d' \
	         -e '/<<.*END/,/^END/b' -e '/<<.*EOF/,/^EOF/b' \
	         -e 's/\\`/\\{backtick}/' \
	         -e "s/[^\\]'\([^']*\`[^']*\)*'/'{quoted-text}'/g" \
	         -e '/`/p' $$*; \
	}; \
	for file in $(xtests); do \
	  res=`scan $$file`; \
	  if test -n "$$res"; then \
	    echo "$$file:$$res"; \
	    found=true; \
	  fi; \
	done; \
	if $$found; then \
	  echo 'Use $$(...), not `...`, for command substitutions.' >&2; \
	  exit 1; \
	fi

## Tests should no longer call 'Exit', just 'exit'.  That's because we
## now have in place a better workaround to ensure the exit status is
## transported correctly across the exit trap.
sc_tests_exit_not_Exit:
	@if grep 'Exit' $(xtests) $(xdefs) | grep -Ev '^[^:]+: *#' | grep .; then \
	  echo "Use 'exit', not 'Exit'; it's obsolete now." 1>&2; \
	  exit 1; \
	fi

## Guard against obsolescent uses of ./defs in tests.  Now,
## 'test-init.sh' should be used instead.
sc_tests_no_source_defs:
	@if grep -E '\. .*defs($$| )' $(xtests); then \
	  echo "Source 'test-init.sh', not './defs'." 1>&2; \
	  exit 1; \
	fi

## Use AUTOMAKE_fails when appropriate
sc_tests_automake_fails:
	@if grep -v '^#' $(xtests) | grep '\$$AUTOMAKE.*&&.*exit'; then \
	  echo 'Use AUTOMAKE_fails + grep to catch automake failures in the above tests.' 1>&2;  \
	  exit 1; \
	fi

## Setting 'required' after sourcing './defs' is a bug.
sc_tests_required_after_defs:
	@for file in $(xtests); do \
	  if out=`sed -n '/defs/,$${/required=/p;}' $$file`; test -n "$$out"; then \
	    echo 'Do not set "required" after sourcing "defs" in '"$$file: $$out" 1>&2; \
	    exit 1; \
	  fi; \
	done

## Overriding a Makefile macro on the command line is not portable when
## recursive targets are used.  Better use an envvar.  SHELL is an
## exception, POSIX says it can't come from the environment.  V, DESTDIR,
## DISTCHECK_CONFIGURE_FLAGS and DISABLE_HARD_ERRORS are exceptions, too,
## as package authors are urged not to initialize them anywhere.
## Finally, 'exp' is used by some ad-hoc checks, where we ensure it's
## ok to override it from the command line.
sc_tests_overriding_macros_on_cmdline:
	@if grep -E '\$$MAKE .*(SHELL=.*=|=.*SHELL=)' $(xtests); then \
	  echo 'Rewrite "$$MAKE foo=bar SHELL=$$SHELL" as "foo=bar $$MAKE -e SHELL=$$SHELL"' 1>&2; \
	  echo ' in the above lines, it is more portable.' 1>&2; \
	  exit 1; \
	fi
# The first s/// tries to account for usages like "$MAKE || st=$?".
# 'DISTCHECK_CONFIGURE_FLAGS' and 'exp' are allowed to contain whitespace in
# their definitions, hence the more complex last three substitutions below.
	@if sed -e 's/ || .*//' -e 's/ && .*//' \
	        -e 's/ DESTDIR=[^ ]*/ /' -e 's/ SHELL=[^ ]*/ /' \
	        -e 's/ V=[^ ]*/ /' -e 's/ DISABLE_HARD_ERRORS=[^ ]*/ /' \
	        -e "s/ DISTCHECK_CONFIGURE_FLAGS='[^']*'/ /" \
	        -e 's/ DISTCHECK_CONFIGURE_FLAGS="[^"]*"/ /' \
	        -e 's/ DISTCHECK_CONFIGURE_FLAGS=[^ ]/ /' \
	        -e "s/ exp='[^']*'/ /" \
	        -e 's/ exp="[^"]*"/ /' \
	        -e 's/ exp=[^ ]/ /' \
	      $(xtests) | grep '\$$MAKE .*='; then \
	  echo 'Rewrite "$$MAKE foo=bar" as "foo=bar $$MAKE -e" in the above lines,' 1>&2; \
	  echo 'it is more portable.' 1>&2; \
	  exit 1; \
	fi
	@if grep 'SHELL=.*\$$MAKE' $(xtests); then \
	  echo '$$MAKE ignores the SHELL envvar, use "$$MAKE SHELL=$$SHELL" in' 1>&2; \
	  echo 'the above lines.' 1>&2; \
	  exit 1; \
	fi

## Prefer use of our 'is_newest' auxiliary script over the more hacky
## idiom "test $(ls -1t new old | sed 1q) = new", which is both more
## cumbersome and more fragile.
sc_tests_ls_t:
	@if LC_ALL=C grep -E '\bls(\s+-[a-zA-Z0-9]+)*\s+-[a-zA-Z0-9]*t' \
	    $(xtests); then \
	  echo "Use 'is_newest' rather than hacks based on 'ls -t'" 1>&2; \
	  exit 1; \
	fi

## Test scripts must be executable.
sc_tests_executable:
	@st=0; \
	for f in $(xtests); do \
	  case $$f in \
	    t/ax/*|./t/ax/*|$(srcdir)/t/ax/*);; \
	    *) test -x $$f || { echo "$$f: not executable" >&2; st=1; }; \
	  esac; \
	done; \
	test $$st -eq 0 || echo '$@: some test scripts are not executable' >&2; \
	exit $$st;


## Never use 'sleep 1' to create files with different timestamps.
## Use '$sleep' instead.  Some filesystems (e.g., Windows) have only
## a 2sec resolution.
sc_tests_plain_sleep:
	@if grep -E '\bsleep +[12345]\b' $(xtests); then \
	  echo 'Do not use "sleep x" in the above tests.  Use "$$sleep" instead.' 1>&2; \
	  exit 1; \
	fi

## fgrep and egrep are not required by POSIX.
sc_m4_am_plain_egrep_fgrep:
	@if grep -E '\b[ef]grep\b' $(ams) $(srcdir)/m4/*.m4; then \
	  echo 'Do not use egrep or fgrep in the above files,' \
	       'they are not portable.' 1>&2; \
	  exit 1; \
	fi

## Prefer 'configure.ac' over the obsolescent 'configure.in' as the name
## for configure input files in our testsuite.  The latter  has been
## deprecated for several years (at least since autoconf 2.50).
sc_tests_no_configure_in:
	@if grep -E '\bconfigure\\*\.in\b' $(xtests) $(xdefs) \
	      | grep -Ev '/backcompat.*\.(sh|tap):' \
	      | grep -Ev '/autodist-configure-no-subdir\.sh:' \
	      | grep -Ev '/(configure|help)\.sh:' \
	      | grep .; \
	then \
	  echo "Use 'configure.ac', not 'configure.in', as the name" >&2; \
	  echo "for configure input files in the test cases above." >&2; \
	  exit 1; \
	fi

## Rule to ensure that the testsuite has been run before.  We don't depend
## on 'check' here, because that would be very wasteful in the common case.
## We could run "make check RECHECK_LOGS=" and avoid toplevel races with
## AM_RECURSIVE_TARGETS.  Suggest keeping test directories around for
## greppability of the Makefile.in files.
sc_ensure_testsuite_has_run:
	@if test ! -f '$(TEST_SUITE_LOG)'; then \
	  echo 'Run "env keep_testdirs=yes make check" before' \
	       'running "make maintainer-check"' >&2; \
	  exit 1; \
	fi
.PHONY: sc_ensure_testsuite_has_run

## Ensure our warning and error messages do not contain duplicate 'warning:' prefixes.
## This test actually depends on the testsuite having been run before.
sc_tests_logs_duplicate_prefixes: sc_ensure_testsuite_has_run
	@if grep -E '(warning|error):.*(warning|error):' t/*.log; then \
	  echo 'Duplicate warning/error message prefixes seen in above tests.' >&2; \
	  exit 1; \
	fi

## Ensure variables are listed before rules in Makefile.in files we generate.
sc_tests_makefile_variable_order: sc_ensure_testsuite_has_run
	@st=0; \
	for file in `find t -name Makefile.in -print`; do \
	  latevars=`sed -n \
	    -e :x -e 's/#.*//' \
	    -e '/\\\\$$/{' -e N -e 'b x' -e '}' \
	    -e '# Literal TAB.' \
	    -e '1,/^	/d' \
	    -e '# Allow @ so we match conditionals.' \
	    -e '/^ *[a-zA-Z_@]\{1,\} *=/p' $$file`; \
	  if test -n "$$latevars"; then \
	    echo "Variables are expanded too late in $$file:" >&2; \
	    echo "$$latevars" | sed 's/^/  /' >&2; \
	    st=1; \
	  fi; \
	done; \
	test $$st -eq 0 || { \
	  echo 'Ensure variables are expanded before rules' >&2; \
	  exit 1; \
	}

## Using ':' as a PATH separator is not portable.
sc_tests_PATH_SEPARATOR:
	@if grep -E '\bPATH=.*:.*' $(xtests) ; then \
	  echo "Use '\$$PATH_SEPARATOR', not ':', in PATH definitions" \
	       "above." 1>&2; \
	  exit 1; \
	fi

## Try to make sure all @...@ substitutions are covered by our
## substitution rule.
sc_perl_at_substs:
	@if test `grep -E '^[^#]*@[A-Za-z_0-9]+@' aclocal | wc -l` -ne 0; then \
	  echo "Unresolved @...@ substitution in aclocal" 1>&2; \
	  exit 1; \
	fi
	@if test `grep -E '^[^#]*@[A-Za-z_0-9]+@' automake | wc -l` -ne 0; then \
	  echo "Unresolved @...@ substitution in automake" 1>&2; \
	  exit 1; \
	fi

sc_unquoted_DESTDIR:
	@if grep -E "[^\'\"]\\\$$\(DESTDIR" $(ams); then \
	  echo 'Suspicious unquoted DESTDIR uses.' 1>&2 ; \
	  exit 1; \
	fi

sc_tabs_in_texi:
	@if grep '	' $(srcdir)/doc/automake.texi; then \
	  echo 'Do not use tabs in the manual.' 1>&2; \
	  exit 1; \
	fi

sc_at_in_texi:
	@if grep -E '([^@]|^)@([	 ][^@]|$$)' $(srcdir)/doc/automake.texi; \
	then \
	  echo 'Unescaped @.' 1>&2; \
	  exit 1; \
	fi

$(syntax_check_rules): automake aclocal
maintainer-check: $(syntax_check_rules)
.PHONY: maintainer-check $(syntax_check_rules)

## Check that the list of tests given in the Makefile is equal to the
## list of all test scripts in the Automake testsuite.
maintainer-check: maintainer-check-list-of-tests