summaryrefslogtreecommitdiff
path: root/Makerules
blob: 76ed429e9d7469cf1d2907e16e52b52bdbeed3ff (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
539
540
541
542
543
544
# Copyright (C) 1991, 1992, 1993, 1994, 1995 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 Library General Public License as
# published by the Free Software Foundation; either version 2 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
# Library General Public License for more details.

# You should have received a copy of the GNU Library General Public
# License along with the GNU C Library; see the file COPYING.LIB.  If
# not, write to the Free Software Foundation, Inc., 675 Mass Ave,
# Cambridge, MA 02139, USA.

#
#	Common rules for making the GNU C library.  This file is included
#	by the top-level Makefile and by all subdirectory makefiles
#	(through Rules).
#
ifneq (,)
This makefile requires GNU Make.
endif


ifdef	subdir
..	:= ../
endif	# subdir

# If `sources' was defined by the parent makefile, undefine it so
# we will later get it from wildcard search in this directory.
ifneq	"$(findstring env,$(origin sources))" ""
sources :=
endif

headers := $(headers) $(sysdep_headers)

oPATH := $(PATH)
PATH := this definition should take precedence over $(oPATH)
ifeq ($(PATH),$(oPATH))
You must not use the -e flag when building the GNU C library.
else
PATH := $(oPATH)
endif

ifndef +included-Makeconfig
include $(..)Makeconfig
endif

# `configure' writes a definition of `config-sysdirs' in `config.make'.
sysdirs = $(config-sysdirs)

+sysdir_pfx = $(common-objpfx)

export sysdirs := $(sysdirs)

+sysdep_dirs := $(addprefix $(sysdep_dir)/,$(sysdirs))
ifdef objdir
+sysdep_dirs := $(objdir) $(+sysdep_dirs)
endif

# Add -I switches to get the right sysdep directories.
# `+includes' in Makeconfig references $(+sysdep-includes).
+sysdep-includes := $(addprefix -I,$(+sysdep_dirs))

# Include any system-specific makefiles.

# This is here so things in sysdep Makefiles can easily depend on foo.h as
# appropriate and not worry about where foo.h comes from, which may be
# system dependent and not known by that Makefile.
vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) \
				      $(addprefix $(sysdep_dir)/,$(sysdirs)) \
				      $(..)))

ifeq ($(wildcard $(+sysdir_pfx)sysd-Makefile),)
# Don't do deps until this exists, because it might change the sources list.
no_deps=t
endif

# Some sysdep makefiles use this to distinguish being included here from
# being included individually by a subdir makefile (hurd/Makefile needs this).
in-Makerules := yes

ifndef avoid-generated
include $(+sysdir_pfx)sysd-Makefile
$(+sysdir_pfx)sysd-Makefile: $(+sysdir_pfx)config.make $(..)Makerules
	-@rm -f $@T
	(for dir in $(sysdirs); do		   			      \
	   file=sysdeps/$$dir/Makefile;					      \
	   if [ -f $(..)$$file ]; then					      \
	     echo include "\$$(..)$$file";				      \
	   else true; fi;						      \
	 done; \
	 echo 'sysd-Makefile-done=t') > $@T
	mv -f $@T $@
endif

# Reorder before-compile so that mach things come first, and hurd things
# second, before all else.  The mach and hurd subdirectories have many
# generated header files which the much of rest of the library depends on,
# so it is best to build them first (and mach before hurd, at that).
before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\
			   $(before-compile)) \
		  $(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
			       $(before-compile))

# Remove existing files from `before-compile'.  Things are added there when
# they must exist for dependency generation to work right, but once they
# exist there is no further need for every single file to depend on them,
# and those gratuitous dependencies result in many gratuitous
# recompilations.
before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))

# Don't let any before-compile file be an intermediate and get removed.
ifdef before-compile
$(before-compile):
endif

# Generate an ordered list of implicit rules which find the source files in
# each sysdep directory.  The old method was to use vpath to search all the
# sysdep directories.  However, that had the problem that a .S file in a
# later directory would be chosen over a .c file in an earlier directory,
# which does not preserve the desired sysdeps ordering behavior.

# When making the list of .d files to include, we can't know which ones
# have source in .s files, and thus do not in fact need a .d file.
# So we must define rules to make .d files for .s files.
define make-dummy-dep
$(addprefix ln $(objpfx)dummy.d ,$(filter-out $(wildcard $@),$@))
endef
$(objpfx)dummy.d:
	echo '# .s files cannot contain includes, so they need no deps.' > $@

# It matters that this set of rules, for compiling from sources in
# the current directory (the $srcdir/$subdir) come before the
# generated sysdep rules in included from sysd-rules below.  When
# compiling in the source tree, generated sources go into the current
# directory, and those should be chosen before any sources in sysdeps.
$(objpfx)%.o: %.S $(before-compile); $(compile-command.S)
$(objpfx)%.d: %.S $(before-compile); $(+make-deps)
$(objpfx)%.o: %.s $(before-compile); $(compile-command.s)
$(objpfx)%.d: %.s $(objpfx)dummy.d; $(make-dummy-dep)
$(objpfx)%.o: %.c $(before-compile); $(compile-command.c)
$(objpfx)%.d: %.c $(before-compile); $(+make-deps)

# Omit the objpfx rules when building in the source tree, because
# objpfx is empty and so these rules just override the ones above.
ifdef objpfx
# Define first rules to find the source files in $(objpfx).
# Generated source files will end up there.
$(objpfx)%.o: $(objpfx)%.S $(before-compile); $(compile-command.S)
$(objpfx)%.d: $(objpfx)%.S $(before-compile); $(+make-deps)
$(objpfx)%.o: $(objpfx)%.s $(before-compile); $(compile-command.s)
$(objpfx)%.d: $(objpfx)%.s $(objpfx)dummy.d; $(make-dummy-dep)
$(objpfx)%.o: $(objpfx)%.c $(before-compile); $(compile-command.c)
$(objpfx)%.d: $(objpfx)%.c $(before-compile); $(+make-deps)
endif

# System-dependent makefiles can put in `inhibit-sysdep-asm' wildcard
# patterns matching sysdep directories whose assembly source files should
# be suppressed.
ifdef inhibit-sysdep-asm
define open-check-inhibit-asm
case $$sysdir in $(subst $(empty) ,|,$(inhibit-sysdep-asm))) : ;; *)
endef
close-check-inhibit-asm = ;; esac
endif

# Don't include sysd-rules until sysd-Makefile is already there and has been
# included.  It might define inhibit-sysdep-asm, which would affect the
# contents of sysd-rules.
ifdef sysd-Makefile-done
include $(+sysdir_pfx)sysd-rules
endif
$(+sysdir_pfx)sysd-rules: $(+sysdir_pfx)config.make $(..)Makerules \
			  $(wildcard $(foreach dir,$(sysdirs),\
					       $(sysdep_dir)/$(dir)/Makefile))
	-@rm -f $@T
	(for sysdir in $(sysdirs); do		   			      \
	   dir="\$$(sysdep_dir)/$$sysdir";				      \
	   $(open-check-inhibit-asm) \
	   echo "\$$(objpfx)%.o: $$dir/%.S \$$(before-compile); \
		\$$(compile-command.S)";				      \
	   echo "\$$(objpfx)%.d: $$dir/%.S \$$(before-compile); \
		\$$(+make-deps)";					      \
	   echo "\$$(objpfx)%.o: $$dir/%.s \$$(before-compile); \
		\$$(compile-command.s)";				      \
	   echo "\$$(objpfx)%.d: $$dir/%.s \$$(objpfx)dummy.d; \
		\$$(make-dummy-dep)" $(close-check-inhibit-asm);	\
	   echo "\$$(objpfx)%.o: $$dir/%.c \$$(before-compile); \
		\$$(compile-command.c)";				      \
	   echo "\$$(objpfx)%.d: $$dir/%.c \$$(before-compile); \
		\$$(+make-deps)";					      \
	 done) > $@T
	mv -f $@T $@

ifndef compile-command.S
compile-command.S = $(compile.S) $(OUTPUT_OPTION)
endif
ifndef compile-command.s
compile-command.s = $(COMPILE.s) $< $(OUTPUT_OPTION)
endif
ifndef compile-command.c
compile-command.c = $(compile.c) $(OUTPUT_OPTION)
endif

ifneq ($(filter %gcc,$(notdir $(firstword $(CC)))),)
# GCC can grok options after the file name, and it looks nicer that way.
compile.S = $(CC) $< -c $(CPPFLAGS) -DASSEMBLER $(asm-CPPFLAGS)
compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
else
compile.S = $(COMPILE.S) -DASSEMBLER $(asm-CPPFLAGS) $<
compile.c = $(COMPILE.c) $<
endif

ifndef OUTPUT_OPTION
ifdef objpfx
# We need this for the output to go in the right place.  It will default to
# empty if make was configured to work with a cc that can't grok -c and -o
# together.  You can't compile the C library with such a compiler.
OUTPUT_OPTION = -o $@
endif
endif

S-CPPFLAGS = $(asm-CPPFLAGS)
define +make-deps
-@rm -f $@
$(+mkdep) $< $(CPPFLAGS) $($(<:$*.%=%)-CPPFLAGS) | \
sed -e 's,$*\.o,$(@:.d=.o) $@,' $(sed-remove-objpfx) > $(@:.d=.T)
mv -f $(@:.d=.T) $@
endef
ifneq (,$(objpfx))
sed-remove-objpfx = -e 's@ $(subst @,\@,$(objpfx))@ $$(objpfx)@g' \
		    -e 's@^$(subst @,\@,$(objpfx))@$$(objpfx)@g'
endif

# Figure out the source filenames in this directory.

override sources	:= $(addsuffix .c,$(filter-out $(elided-routines),\
						       $(routines) $(aux) \
						       $(sysdep_routines)))
sysdep_routines := $(sysdep_routines)

# This is the list of all object files, gotten by
# replacing every ".c" in `sources' with a ".o".
override objects	:= $(addprefix $(objpfx),$(sources:.c=.o))

+depfiles := $(strip $(sources:.c=.d) \
		     $(patsubst %.o,%.d,$(filter %.o,$(extra-objs))) \
		     $(addsuffix .d,$(others) $(tests)))
+depfiles := $(addprefix $(objpfx),\
			 $(filter-out $(addsuffix .d,$(omit-deps)),\
				      $(+depfiles)))

$(objpfx)depend-$(subdir): Makefile
ifdef +depfiles
	for file in $(+depfiles:$(objpfx)%=%); do \
	  echo "include \$$(objpfx)$$file";	\
	done > $@-tmp
	mv -f $@-tmp $@
else
	cp /dev/null $@
endif

ifneq ($(no_deps),t)
# Include the generated dependencies of the sources in this directory.
include $(objpfx)depend-$(subdir)
endif

# Maximize efficiency by minimizing the number of rules.
.SUFFIXES:	# Clear the suffix list.
# Add the suffixes we use.
.SUFFIXES: .a .o .S .s .c .h .d

# Generic rule for making directories.
%/:
# mkdir isn't smart enough to strip a trailing /.
	mkdir $(@:%/=%)

# Make sure that object files are not removed
# when they are intermediates between sources and library members.
# This can go away with make v4.
.PRECIOUS: %.o

# Make sure that the parent library archive is never removed.
.PRECIOUS: $(libc.a)

# Use the verbose option of ar and tar when not running silently.
ifeq	"$(findstring s,$(MAKEFLAGS))" ""	# if not -s
verbose := v
else	   					# -s
verbose	:=
endif						# not -s

ARFLAGS := r$(verbose)

# This makes all the object files in the parent library archive.

.PHONY: lib libobjs lib-noranlib
$(libc.a): $(libc.a)(__.SYMDEF)
lib: $(libc.a)

+libobjs := $(patsubst %,$(libc.a)(%),$(notdir $(objects)))
libobjs: $(+libobjs)
lib-noranlib: libobjs

# Define a pattern rule that will match many targets libc.%(foo.o), for
# each foo in $(objects) (% will just happen always to match `a').  This is
# the only way to define a rule that updates many targets at once with one
# sequence of commands.
ifdef objects
$(patsubst %,$(libc.a:a=)\%(%),$(notdir $(objects))): $(objpfx)stamp-$(subdir);
$(objpfx)stamp-$(subdir): $(objects)
#	$(+libc_lock_open)
ifdef objdir
	cd $(objdir); $(AR) cru$(verbose) libc.a $(patsubst $(objpfx)%,%,$^)
else
	$(AR) cru$(verbose) $(..)libc.a $^
endif
#	$(+libc_lock_close)
	touch $@
endif

$(libc.a)(__.SYMDEF): $(+libobjs)
	$(RANLIB) $@

define +libc_lock_open
@. $(..)libc-lock-open
endef
define +libc_lock_close
@rm -f $(..)LOCK-libc.a
endef

# This makes all the object files.
.PHONY: objects objs
objects objs: $(objects) $(addprefix $(objpfx),$(extra-objs))

# Installation.

# $(install-lib) are installed from the object directory into $(libdir);
# files in $(install-lib) matching `lib%.a' are ranlib'd after installation
# unless they also appear in $(non-lib.a).  $(install-data) are installed
# as they are into $(datadir).  $(headers) are installed as they are in
# $(includedir).  $(install-bin) and $(install-sbin) are installed from the
# object directory into $(bindir) and $(sbindir), respectively.
# $(install-others) are absolute path names of files to install; rules to
# install them are defined elsewhere.

# The simple library name to install libc.a under.
# This could be defined by a sysdep Makefile.
ifndef libc-name
libc-name := c
endif

define do-install
$(make-target-directory)
$(INSTALL_DATA) $< $@
endef

# Make the target directory if it doesn't exist.  Because of make's
# directory cache, this will produce the `mkdir' command when the directory
# already exists, if it didn't exist at the start of the `make' run.  The
# `-' prefix ignores errors from mkdir, so there will just be some
# gratuitous but harmless `File exists' messages.
define make-target-directory
$(addprefix -mkdir ,$(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
endef

# Any directory (parent or subdir) that has any object files to build
# should install libc.a; this way "make install" in a subdir is guaranteed
# to install everything it changes.
ifdef objects
install: $(libdir)/lib$(libprefix)$(libc-name).a
# We avoid depending on lib-noranlib because that makes the parent make
# subdir_lib in all the subdirs, when the make install run they do will
# update the library anyway.  Running ranlib after installing makes the
# __.SYMDEF time stamp up to date, which avoids messages from some linkers.
# Depending on subdir_install gets all the subdirs to update the library,
# and is optimal for `make install' at top level.
$(libdir)/lib$(libprefix)$(libc-name).a: libobjs subdir_install
	$(make-target-directory)
	$(INSTALL_DATA) $(libc.a) $@
	$(RANLIB) $@
endif

ifdef install-bin
$(addprefix $(bindir)/,$(install-bin)): $(bindir)/%: $(objpfx)%
	$(make-target-directory)
	$(INSTALL_PROGRAM) $< $@
endif
ifdef install-sbin
$(addprefix $(sbindir)/,$(install-sbin)): $(sbindir)/%: $(objpfx)%
	$(make-target-directory)
	$(INSTALL_PROGRAM) $< $@
endif
ifdef install-lib
install-lib.a := $(filter lib%.a,$(install-lib))
install-lib-non.a := $(filter-out lib%.a,$(install-lib))
ifdef install-lib-non.a
$(addprefix $(libdir)/$(libprefix),$(install-lib-non.a)): \
  $(libdir)/$(libprefix)%: $(objpfx)%
	$(do-install)
endif
ifdef install-lib.a
$(install-lib.a:lib%.a=$(libdir)/lib$(libprefix)%.a): \
  $(libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a
	$(do-install)
	$(patsubst %,$(RANLIB) $@,$(filter-out $(non-lib.a),$(<F)))
endif
endif
ifdef install-data
$(addprefix $(datadir)/,$(install-data)): $(datadir)/%: %;$(do-install)
endif
headers := $(strip $(headers))
ifdef headers
$(addprefix $(includedir)/,$(headers)): \
	$(includedir)/%: %;$(do-install)
endif	# headers

.PHONY: install-bin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
	install-data-nosubdir install-headers-nosubdir
install-bin-nosubdir: $(addprefix $(bindir)/,$(install-bin))
install-sbin-nosubdir: $(addprefix $(sbindir)/,$(install-sbin))
install-lib-nosubdir: $(addprefix $(libdir)/,\
		       $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
		       $(addprefix $(libprefix),$(install-lib-non.a)))
install-data-nosubdir: $(addprefix $(datadir)/,$(install-data))
install-headers-nosubdir: $(addprefix $(includedir)/,$(headers))
install-others-nosubdir: $(install-others)

# We need all the `-nosubdir' targets so that `install' in the parent
# doesn't depend on several things which each iterate over the subdirs.
# This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
# subroutine.  Then in the parent `install-FOO' also causes subdir makes.
install-%:: install-%-nosubdir ;

.PHONY: install install-no-libc.a-nosubdir
install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir\
			    install-bin-nosubdir install-lib-nosubdir	\
			    install-others-nosubdir install-sbin-nosubdir
install: install-no-libc.a-nosubdir

# Command to compile $< in $(objdir) using the native libraries.
define native-compile
cwd=`pwd`; cd $(@D); $(BUILD_CC) $(BUILD_CFLAGS) \
	   $(addprefix $$cwd/,$^) -o $(@F)
endef

# Command to compile $< in $(common-objdir) using the native libraries.
define common-objdir-compile
cd $(@D); $(BUILD_CC) $(BUILD_CFLAGS) $(<:$(common-objpfx)%=%) -o $(@F)
endef

# We always want to use configuration definitions.
BUILD_CFLAGS = -include $(common-objpfx)config.h

# Support the GNU standard name for this target.
.PHONY: check
check: tests

.PHONY: TAGS
TAGS: distinfo $(..)MakeTAGS
	$(MAKE) $(addprefix -f ,$^)

.PHONY: echo-headers
echo-headers:
	@echo $(headers)


# Common cleaning targets.

.PHONY: common-mostlyclean common-clean mostlyclean clean
clean: common-clean
mostlyclean: common-mostlyclean

# Remove the object files.
common-mostlyclean:
	-rm -f $(addprefix $(objpfx),$(tests) $(others) \
				     $(addsuffix .o,$(tests) $(others)) \
				     $(addsuffix .out,$(tests)))
	-rm -f $(objects) $(addprefix $(objpfx),$(extra-objs) stamp-$(subdir))
	-rm -f core TAGS

# Also remove the dependencies and generated source files.
common-clean: common-mostlyclean
	-rm -f $(objpfx)depend-$(subdir) $(+depfiles)
	-rm -f $(addprefix $(objpfx),$(generated))

# Produce a file `stub-$(subdir)' which contains `#define __stub_FUNCTION'
# for each function which is a stub.  We grovel over all the .d files
# looking for references to source files in sysdeps/stub.  Then we grovel
# over each referenced source file to see what stub function it defines.

.PHONY: stubs # The parent Makefile calls this target.
stubs: $(common-objpfx)stub-$(subdir)
s = $(sysdep_dir)/stub
$(common-objpfx)stub-$(subdir): $(+depfiles)
# Use /dev/null since `...` might expand to empty.
	s=`cd $s; /bin/pwd`; \
	$(patsubst %,cd %;,$(objdir)) \
	sed -n 's/^stub_warning *(\([^)]*\).*$$/#define __stub_\1/p' \
	    `sed -n 's@^.*$s/\([a-z0-9_-]*\.c\).*$$@'"$$s"/'\1@p' \
		 $(patsubst $(objpfx)%,%,$^) /dev/null` \
	    /dev/null > $@T
	mv -f $@T $@

# Make the distribution tar file.

.PHONY: dist
dist: distinfo $(..)Make-dist 
	$(MAKE) -f $< -f $(word 2,$^) $(Make-dist-args)

dist: $(distribute)

# We used to simply export all these variables, but that frequently made the
# environment get too large.  Instead, we write all the information into
# a generated makefile fragment `distinfo', and then include it with -f in
# the sub-make that makes the distribution (above).
distinfo: Makefile $(..)Makerules
	$(distinfo-vars)
	mv -f $@.new $@

define distinfo-vars
rm -f $@.new
$(foreach var,subdir sources elided-routines headers distribute \
	      dont_distribute generated others tests,
echo >> $@.new '$(var)	:= $($(var))')
echo >> $@.new 'sources := $$(sources) $$(addsuffix .c,$$(elided-routines))'
endef

ifneq (,$(strip $(gpl2lgpl)))
ifneq (,$(wildcard $(..)gpl2lgpl.sed))
# Snarf from the master source and frob the copying notice.
$(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
	sed -f $^ > $@-tmp
# So I don't edit them by mistake.
	chmod a-w $@-tmp
	mv -f $@-tmp $@
	test -d CVS && cvs commit -m'Updated from $^' $@
endif
endif