about summary refs log tree commit diff
path: root/Makefile
blob: d7e4be9e101738d411c6e2e84c30c09e58934f6f (plain) (blame)
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
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
# Copyright (C) 1991-2019 Free Software Foundation, Inc.
# This file is part of the GNU C Library.

# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.

# The GNU C Library 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
# Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <https://www.gnu.org/licenses/>.

#
#	Master Makefile for the GNU C library
#
ifneq (,)
This makefile requires GNU Make.
endif

include Makeconfig


# This is the default target; it makes everything except the tests.
.PHONY: all help minihelp
all: minihelp lib others

help:
	@sed '0,/^help-starts-here$$/d' Makefile.help

minihelp:
	@echo
	@echo type \"make help\" for help with common glibc makefile targets
	@echo


ifneq ($(AUTOCONF),no)

define autoconf-it
@-rm -f $@.new
$(AUTOCONF) $(ACFLAGS) $< > $@.new
chmod a-w$(patsubst %,$(comma)a+x,$(filter .,$(@D))) $@.new
mv -f $@.new $@
endef

configure: configure.ac aclocal.m4; $(autoconf-it)
%/configure: %/configure.ac aclocal.m4; $(autoconf-it)
%/preconfigure: %/preconfigure.ac aclocal.m4; $(autoconf-it)

endif # $(AUTOCONF) = no


# We don't want to run anything here in parallel.
.NOTPARALLEL:

# These are the targets that are made by making them in each subdirectory.
+subdir_targets	:= subdir_lib objects objs others subdir_mostlyclean	\
		   subdir_clean subdir_distclean subdir_realclean	\
		   tests xtests						\
		   subdir_update-abi subdir_check-abi			\
		   subdir_update-all-abi				\
		   subdir_echo-headers					\
		   subdir_install					\
		   subdir_objs subdir_stubs subdir_testclean		\
		   $(addprefix install-, no-libc.a bin lib data headers others)

headers := limits.h values.h features.h gnu-versions.h \
	   bits/xopen_lim.h gnu/libc-version.h stdc-predef.h \
	   bits/libc-header-start.h

echo-headers: subdir_echo-headers

# The headers are in the include directory.
subdir-dirs = include
vpath %.h $(subdir-dirs)

# What to install.
install-others = $(inst_includedir)/gnu/stubs.h
install-bin-script =

ifeq (yes,$(build-shared))
headers += gnu/lib-names.h
endif

include Makerules

ifeq ($(build-programs),yes)
others: $(addprefix $(objpfx),$(install-bin-script))
endif

# Install from subdirectories too.
install: subdir_install

# Explicit dependency so that `make install-headers' works
install-headers: install-headers-nosubdir

# Make sure that the dynamic linker is installed before libc.
$(inst_slibdir)/libc-$(version).so: elf/ldso_install

.PHONY: elf/ldso_install
elf/ldso_install:
	$(MAKE) -C $(@D) $(@F)

# Create links for shared libraries using the `ldconfig' program if possible.
# Ignore the error if we cannot update /etc/ld.so.cache.
ifeq (no,$(cross-compiling))
ifeq (yes,$(build-shared))
install: install-symbolic-link
.PHONY: install-symbolic-link
install-symbolic-link: subdir_install
	$(symbolic-link-prog) $(symbolic-link-list)
	rm -f $(symbolic-link-list)

install:
	-test ! -x $(elf-objpfx)ldconfig || LC_ALL=C \
	  $(elf-objpfx)ldconfig $(addprefix -r ,$(install_root)) \
				$(slibdir) $(libdir)
ifneq (no,$(PERL))
ifeq (/usr,$(prefix))
ifeq (,$(install_root))
	LD_SO=$(ld.so-version) CC="$(CC)" $(PERL) scripts/test-installation.pl $(common-objpfx)
endif
endif
endif
endif
endif

# Build subdirectory lib objects.
lib-noranlib: subdir_lib

ifeq (yes,$(build-shared))
# Build the shared object from the PIC object library.
lib: $(common-objpfx)libc.so $(common-objpfx)linkobj/libc.so
endif # $(build-shared)

# Used to build testrun.sh.
define testrun-script
#!/bin/bash
builddir=`dirname "$$0"`
GCONV_PATH="$${builddir}/iconvdata"

usage () {
  echo "usage: $$0 [--tool=strace] PROGRAM [ARGUMENTS...]" 2>&1
  echo "       $$0 --tool=valgrind PROGRAM [ARGUMENTS...]" 2>&1
  exit 1
}

toolname=default
while test $$# -gt 0 ; do
  case "$$1" in
    --tool=*)
      toolname="$${1:7}"
      shift
      ;;
    --*)
      usage
      ;;
    *)
      break
      ;;
  esac
done

if test $$# -eq 0 ; then
  usage
fi

case "$$toolname" in
  default)
    exec $(subst $(common-objdir),"$${builddir}", $(test-program-prefix)) \
      $${1+"$$@"}
    ;;
  strace)
    exec strace $(patsubst %, -E%, $(run-program-env)) \
      $(test-via-rtld-prefix) $${1+"$$@"}
    ;;
  valgrind)
    exec env $(run-program-env) valgrind $(test-via-rtld-prefix) $${1+"$$@"}
    ;;
  *)
    usage
    ;;
esac
endef

# This is a handy script for running any dynamically linked program against
# the current libc build for testing.
$(common-objpfx)testrun.sh: $(common-objpfx)config.make \
			    $(..)Makeconfig $(..)Makefile
	$(file >$@T,$(testrun-script))
	chmod a+x $@T
	mv -f $@T $@
postclean-generated += testrun.sh

define debugglibc
#!/bin/bash

SOURCE_DIR="$(CURDIR)"
BUILD_DIR="$(common-objpfx)"
CMD_FILE="$(common-objpfx)debugglibc.gdb"
DIRECT=true
SYMBOLSFILE=true
unset TESTCASE
unset BREAKPOINTS
unset ENVVARS

usage()
{
cat << EOF
Usage: $$0 [OPTIONS] <program>

   Or: $$0 [OPTIONS] -- <program> [<args>]...

  where <program> is the path to the program being tested,
  and <args> are the arguments to be passed to it.

Options:

  -h, --help
	Prints this message and leaves.

  The following options require one argument:

  -b, --breakpoint
	Breakpoints to set at the beginning of the execution
	(each breakpoint demands its own -b option, e.g. -b foo -b bar)
  -e, --environment-variable
	Environment variables to be set with 'exec-wrapper env' in GDB
	(each environment variable demands its own -e option, e.g.
	-e FOO=foo -e BAR=bar)

  The following options do not take arguments:

  -i, --no-direct
	Selects whether to pass the --direct flag to the program.
	--direct is useful when debugging glibc test cases. It inhibits the
	tests from forking and executing in a subprocess.
	Default behaviour is to pass the --direct flag, except when the
	program is run with user specified arguments using the "--" separator.
  -s, --no-symbols-file
	Do not tell GDB to load debug symbols from the program.
EOF
}

# Parse input options
while [[ $$# > 0 ]]
do
  key="$$1"
  case $$key in
    -h|--help)
      usage
      exit 0
      ;;
    -b|--breakpoint)
      BREAKPOINTS="break $$2\n$$BREAKPOINTS"
      shift
      ;;
    -e|--environment-variable)
      ENVVARS="$$2 $$ENVVARS"
      shift
      ;;
    -i|--no-direct)
      DIRECT=false
      ;;
    -s|--no-symbols-file)
      SYMBOLSFILE=false
      ;;
    --)
      shift
      TESTCASE=$$1
      COMMANDLINE="$$@"
      # Don't add --direct when user specifies program arguments
      DIRECT=false
      break
      ;;
    *)
      TESTCASE=$$1
      COMMANDLINE=$$TESTCASE
      ;;
  esac
  shift
done

# Check for required argument
if [ ! -v TESTCASE ]
then
  usage
  exit 1
fi

# Expand environment setup command
if [ -v ENVVARS ]
then
  ENVVARSCMD="set exec-wrapper env $$ENVVARS"
fi

# Expand direct argument
if [ "$$DIRECT" == true ]
then
  DIRECT="--direct"
else
  DIRECT=""
fi

# Expand symbols loading command
if [ "$$SYMBOLSFILE" == true ]
then
  SYMBOLSFILE="add-symbol-file $${TESTCASE}"
else
  SYMBOLSFILE=""
fi

# GDB commands template
template ()
{
cat <<EOF
set environment C -E -x c-header
set auto-load safe-path $${BUILD_DIR}/nptl_db:\$$debugdir:\$$datadir/auto-load
set libthread-db-search-path $${BUILD_DIR}/nptl_db
__ENVVARS__
__SYMBOLSFILE__
break _dl_start_user
run --library-path $(rpath-link):$${BUILD_DIR}/nptl_db \
__COMMANDLINE__ __DIRECT__
__BREAKPOINTS__
EOF
}

# Generate the commands file for gdb initialization
template | sed \
  -e "s|__ENVVARS__|$$ENVVARSCMD|" \
  -e "s|__SYMBOLSFILE__|$$SYMBOLSFILE|" \
  -e "s|__COMMANDLINE__|$$COMMANDLINE|" \
  -e "s|__DIRECT__|$$DIRECT|" \
  -e "s|__BREAKPOINTS__|$$BREAKPOINTS|" \
  > $$CMD_FILE

echo
echo "Debugging glibc..."
echo "Build directory  : $$BUILD_DIR"
echo "Source directory : $$SOURCE_DIR"
echo "GLIBC Testcase   : $$TESTCASE"
echo "GDB Commands     : $$CMD_FILE"
echo "Env vars         : $$ENVVARS"
echo

# Start the test case debugging in two steps:
#   1. the following command invokes gdb to run the loader;
#   2. the commands file tells the loader to run the test case.
gdb -q \
  -x $${CMD_FILE} \
  -d $${SOURCE_DIR} \
  $${BUILD_DIR}/elf/ld.so
endef

# This is another handy script for debugging dynamically linked program
# against the current libc build for testing.
$(common-objpfx)debugglibc.sh: $(common-objpfx)config.make \
			    $(..)Makeconfig $(..)Makefile
	$(file >$@T,$(debugglibc))
	chmod a+x $@T
	mv -f $@T $@
postclean-generated += debugglibc.sh debugglibc.gdb

others: $(common-objpfx)testrun.sh $(common-objpfx)debugglibc.sh

# Makerules creates a file `stubs' in each subdirectory, which
# contains `#define __stub_FUNCTION' for each function defined in that
# directory which is a stub.
# Here we paste all of these together into <gnu/stubs.h>.

subdir-stubs := $(foreach dir,$(subdirs),$(common-objpfx)$(dir)/stubs)

ifndef abi-variants
installed-stubs = $(inst_includedir)/gnu/stubs.h
else
installed-stubs = $(inst_includedir)/gnu/stubs-$(default-abi).h

$(inst_includedir)/gnu/stubs.h: $(+force)
	$(make-target-directory)
	{ \
	 echo '/* This file is automatically generated.';\
	 echo "   This file selects the right generated file of \`__stub_FUNCTION' macros";\
	 echo '   based on the architecture being compiled for.  */'; \
	 echo ''; \
	 $(foreach h,$(abi-includes), echo '#include <$(h)>';) \
	 echo ''; \
	 $(foreach v,$(abi-variants),\
	 $(if $(abi-$(v)-condition),\
	 echo '#if $(abi-$(v)-condition)'; \
	 echo '# include <gnu/stubs-$(v).h>'); \
	 $(if $(abi-$(v)-condition),echo '#endif';) \
	 rm -f $(@:.d=.h).new$(v); \
	 ) \
	} > $(@:.d=.h).new
	mv -f $(@:.d=.h).new $(@:.d=.h)

install-others-nosubdir: $(installed-stubs)
endif


# Since stubs.h is never needed when building the library, we simplify the
# hairy installation process by producing it in place only as the last part
# of the top-level `make install'.  It depends on subdir_install, which
# iterates over all the subdirs; subdir_install in each subdir depends on
# the subdir's stubs file.  Having more direct dependencies would result in
# extra iterations over the list for subdirs and many recursive makes.
$(installed-stubs): include/stubs-prologue.h subdir_install
	$(make-target-directory)
	@rm -f $(objpfx)stubs.h
	(sed '/^@/d' $<; LC_ALL=C sort $(subdir-stubs)) > $(objpfx)stubs.h
	if test -r $@ && cmp -s $(objpfx)stubs.h $@; \
	then echo 'stubs.h unchanged'; \
	else $(INSTALL_DATA) $(objpfx)stubs.h $@; fi
	rm -f $(objpfx)stubs.h

# This makes the Info or DVI file of the documentation from the Texinfo source.
.PHONY: info dvi pdf html
info dvi pdf html:
	$(MAKE) $(PARALLELMFLAGS) -C manual $@

# This makes all the subdirectory targets.

# For each target, make it depend on DIR/target for each subdirectory DIR.
$(+subdir_targets): %: $(addsuffix /%,$(subdirs))

# Compute a list of all those targets.
all-subdirs-targets := $(foreach dir,$(subdirs),\
				 $(addprefix $(dir)/,$(+subdir_targets)))

# The action for each of those is to cd into the directory and make the
# target there.
$(all-subdirs-targets):
	$(MAKE) $(PARALLELMFLAGS) $(subdir-target-args) $(@F)

define subdir-target-args
subdir=$(@D)$(if $($(@D)-srcdir),\
-C $($(@D)-srcdir) ..=`pwd`/,\
-C $(@D) ..=../)
endef

.PHONY: $(+subdir_targets) $(all-subdirs-targets)

# Targets to clean things up to various degrees.

.PHONY: clean realclean distclean distclean-1 parent-clean parent-mostlyclean \
	tests-clean

# Subroutines of all cleaning targets.
parent-mostlyclean: common-mostlyclean # common-mostlyclean is in Makerules.
	-rm -f $(foreach o,$(object-suffixes-for-libc),\
		   $(common-objpfx)$(patsubst %,$(libtype$o),c)) \
	       $(addprefix $(objpfx),$(install-lib))
parent-clean: parent-mostlyclean common-clean

postclean = $(addprefix $(common-objpfx),$(postclean-generated)) \
	    $(addprefix $(objpfx),sysd-dirs sysd-rules) \
	    $(addprefix $(objpfx),sysd-sorted soversions.mk soversions.i)

clean: parent-clean
# This is done this way rather than having `subdir_clean' be a
# dependency of this target so that libc.a will be removed before the
# subdirectories are dealt with and so they won't try to remove object
# files from it when it's going to be removed anyway.
	@$(MAKE) subdir_clean no_deps=t
	-rm -f $(postclean)
mostlyclean: parent-mostlyclean
	@$(MAKE) subdir_mostlyclean no_deps=t
	-rm -f $(postclean)

tests-clean:
	@$(MAKE) subdir_testclean no_deps=t

ifneq (,$(CXX))
vpath c++-types.data $(+sysdep_dirs)

tests-special += $(objpfx)c++-types-check.out
$(objpfx)c++-types-check.out: c++-types.data scripts/check-c++-types.sh
	scripts/check-c++-types.sh $< $(CXX) $(filter-out -std=gnu11 $(+gccwarn-c),$(CFLAGS)) $(CPPFLAGS) > $@; \
	$(evaluate-test)
endif

tests-special += $(objpfx)check-local-headers.out
$(objpfx)check-local-headers.out: scripts/check-local-headers.sh
	AWK='$(AWK)' scripts/check-local-headers.sh \
	  "$(includedir)" "$(objpfx)" < /dev/null > $@; \
	$(evaluate-test)

ifneq "$(headers)" ""
# Special test of all the installed headers in this directory.
tests-special += $(objpfx)check-installed-headers-c.out
libof-check-installed-headers-c := testsuite
$(objpfx)check-installed-headers-c.out: \
    scripts/check-installed-headers.sh $(headers)
	$(SHELL) $(..)scripts/check-installed-headers.sh c \
	  "$(CC) $(filter-out -std=%,$(CFLAGS)) -D_ISOMAC $(+includes)" \
	  $(headers) > $@; \
	$(evaluate-test)

ifneq "$(CXX)" ""
tests-special += $(objpfx)check-installed-headers-cxx.out
libof-check-installed-headers-cxx := testsuite
$(objpfx)check-installed-headers-cxx.out: \
    scripts/check-installed-headers.sh $(headers)
	$(SHELL) $(..)scripts/check-installed-headers.sh c++ \
	  "$(CXX) $(filter-out -std=%,$(CXXFLAGS)) -D_ISOMAC $(+includes)" \
	  $(headers) > $@; \
	$(evaluate-test)
endif # $(CXX)

tests-special += $(objpfx)check-wrapper-headers.out
$(objpfx)check-wrapper-headers.out: scripts/check-wrapper-headers.py $(headers)
	$(PYTHON) $< --root=. --subdir=. $(headers) \
	  --generated $(common-generated) > $@; $(evaluate-test)
endif # $(headers)

define summarize-tests
@egrep -v '^(PASS|XFAIL):' $(objpfx)$1 || true
@echo "Summary of test results$2:"
@sed 's/:.*//' < $(objpfx)$1 | sort | uniq -c
@! egrep -q -v '^(X?PASS|XFAIL|UNSUPPORTED):' $(objpfx)$1
endef

# The intention here is to do ONE install of our build into the
# testroot.pristine/ directory, then rsync (internal to
# support/test-container) that to testroot.root/ at the start of each
# test.  That way we can promise each test a "clean" install, without
# having to do the install for each test.
#
# In addition, we have to copy some files (which we build) into this
# root in addition to what glibc installs.  For example, many tests
# require additional programs including /bin/sh, /bin/true, and
# /bin/echo, all of which we build below to limit library dependencies
# to just those things in glibc and language support libraries which
# we also copy into the into the rootfs.  To determine what language
# support libraries we need we build a "test" program in either C or
# (if available) C++ just so we can copy in any shared objects
# (which we do not build) that GCC-compiled programs depend on.


ifeq (,$(CXX))
LINKS_DSO_PROGRAM = links-dso-program-c
else
LINKS_DSO_PROGRAM = links-dso-program
endif

$(tests-container) $(addsuffix /tests,$(subdirs)) : \
		$(objpfx)testroot.pristine/install.stamp
$(objpfx)testroot.pristine/install.stamp :
	test -d $(objpfx)testroot.pristine || \
	  mkdir $(objpfx)testroot.pristine
	# We need a working /bin/sh for some of the tests.
	test -d $(objpfx)testroot.pristine/bin || \
	  mkdir $(objpfx)testroot.pristine/bin
	cp $(objpfx)support/shell-container $(objpfx)testroot.pristine/bin/sh
	cp $(objpfx)support/echo-container $(objpfx)testroot.pristine/bin/echo
	cp $(objpfx)support/true-container $(objpfx)testroot.pristine/bin/true
ifeq ($(run-built-tests),yes)
	# Copy these DSOs first so we can overwrite them with our own.
	for dso in `$(test-wrapper-env) LD_TRACE_LOADED_OBJECTS=1  \
		$(rtld-prefix) \
		$(objpfx)testroot.pristine/bin/sh \
	        | grep / | sed 's/^[^/]*//' | sed 's/ .*//'` ;\
	  do \
	    test -d `dirname $(objpfx)testroot.pristine$$dso` || \
	      mkdir -p `dirname $(objpfx)testroot.pristine$$dso` ;\
	    $(test-wrapper) cp $$dso $(objpfx)testroot.pristine$$dso ;\
	  done
	for dso in `$(test-wrapper-env) LD_TRACE_LOADED_OBJECTS=1  \
		$(rtld-prefix) \
		$(objpfx)support/$(LINKS_DSO_PROGRAM) \
	        | grep / | sed 's/^[^/]*//' | sed 's/ .*//'` ;\
	  do \
	    test -d `dirname $(objpfx)testroot.pristine$$dso` || \
	      mkdir -p `dirname $(objpfx)testroot.pristine$$dso` ;\
	    $(test-wrapper) cp $$dso $(objpfx)testroot.pristine$$dso ;\
	  done
endif
	$(MAKE) install DESTDIR=$(objpfx)testroot.pristine \
	  subdirs='$(sorted-subdirs)'
	touch $(objpfx)testroot.pristine/install.stamp

tests-special-notdir = $(patsubst $(objpfx)%, %, $(tests-special))
tests: $(tests-special)
	$(..)scripts/merge-test-results.sh -s $(objpfx) "" \
	  $(sort $(tests-special-notdir:.out=)) \
	  > $(objpfx)subdir-tests.sum
	$(..)scripts/merge-test-results.sh -t $(objpfx) subdir-tests.sum \
	  $(sort $(subdirs) .) \
	  > $(objpfx)tests.sum
	$(call summarize-tests,tests.sum)
xtests:
	$(..)scripts/merge-test-results.sh -t $(objpfx) subdir-xtests.sum \
	  $(sort $(subdirs)) \
	  > $(objpfx)xtests.sum
	$(call summarize-tests,xtests.sum, for extra tests)

# The realclean target is just like distclean for the parent, but we want
# the subdirs to know the difference in case they care.
realclean distclean: parent-clean
# This is done this way rather than having `subdir_distclean' be a
# dependency of this target so that libc.a will be removed before the
# subdirectories are dealt with and so they won't try to remove object
# files from it when it's going to be removed anyway.
	@$(MAKE) distclean-1 no_deps=t distclean-1=$@ avoid-generated=yes \
		 sysdep-subdirs="$(sysdep-subdirs)"
	-rm -f $(postclean)

# Subroutine of distclean and realclean.
distclean-1: subdir_$(distclean-1)
	-rm -f $(config-generated)
	-rm -f $(addprefix $(objpfx),config.status config.cache config.log)
	-rm -f $(addprefix $(objpfx),config.make config-name.h config.h)
ifdef objdir
	-rm -f $(objpfx)Makefile
endif
	-rm -f $(sysdep-$(distclean-1))

# Make the TAGS file for Emacs users.

.PHONY: TAGS
TAGS:
	scripts/list-sources.sh | sed -n -e '/Makefile/p' \
	  $(foreach S,[chsSyl] cxx sh bash pl,\
		    $(subst .,\.,-e '/.$S\(.in\)*$$/p')) \
	| $(ETAGS) -o $@ -

# Make the distribution tarfile.
.PHONY: dist dist-prepare

generated := $(generated) stubs.h

files-for-dist := README INSTALL configure ChangeLog NEWS

# Regenerate stuff, then error if these things are not committed yet.
dist-prepare: $(files-for-dist)
	conf=`find sysdeps -name configure`; \
	$(MAKE) $$conf && \
	git diff --stat HEAD -- $^ $$conf \
	| $(AWK) '{ print; rc=1 } END { exit rc }'

%.tar: FORCE
	git archive --prefix=$*/ $* > $@.new
	mv -f $@.new $@

# Do `make dist dist-version=X.Y.Z' to make tar files of an older version.

ifneq (,$(strip $(dist-version)))
dist: $(foreach Z,.bz2 .gz .xz,$(dist-version).tar$Z)
	md5sum $^
else
dist: dist-prepare
	@if v=`git describe`; then \
	  echo Distribution version $$v; \
	  $(MAKE) dist dist-version=$$v; \
	else \
	  false; \
	fi
endif

INSTALL: manual/install-plain.texi manual/macros.texi \
	 $(common-objpfx)manual/pkgvers.texi manual/install.texi
	makeinfo --no-validate --plaintext --no-number-sections \
		 -I$(common-objpfx)manual $< -o $@-tmp
	$(AWK) 'NF == 0 { ++n; next } \
		NF != 0 { while (n-- > 0) print ""; n = 0; print }' \
	  < $@-tmp > $@-tmp2
	rm -f $@-tmp
	-chmod a-w $@-tmp2
	mv -f $@-tmp2 $@
$(common-objpfx)manual/%: FORCE
	$(MAKE) $(PARALLELMFLAGS) -C manual $@
FORCE:

iconvdata/% localedata/% po/%: FORCE
	$(MAKE) $(PARALLELMFLAGS) -C $(@D) $(@F)

# Convenience target to rerun one test, from the top of the build tree
# Example: make test t=wcsmbs/test-wcsnlen
.PHONY: test
test :
	@-rm -f $(objpfx)$t.out
	$(MAKE) subdir=$(dir $t) -C $(dir $t) ..=../ $(objpfx)$t.out
	@cat $(objpfx)$t.test-result
	@cat $(objpfx)$t.out