1 # Copyright (C) 1991-2014 Free Software Foundation, Inc.
2 # This file is part of the GNU C Library.
4 # The GNU C Library is free software; you can redistribute it and/or
5 # modify it under the terms of the GNU Lesser General Public
6 # License as published by the Free Software Foundation; either
7 # version 2.1 of the License, or (at your option) any later version.
9 # The GNU C Library 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 GNU
12 # Lesser General Public License for more details.
14 # You should have received a copy of the GNU Lesser General Public
15 # License along with the GNU C Library; if not, see
16 # <http://www.gnu.org/licenses/>.
19 # Common rules for making the GNU C library. This file is included
20 # by the top-level Makefile and by all subdirectory makefiles
24 This makefile requires GNU Make.
27 REQUIRED_MAKE_VERSION = 3.74
28 REAL_MAKE_VERSION = $(firstword $(MAKE_VERSION))
30 ifneq ($(REQUIRED_MAKE_VERSION), \
31 $(firstword $(sort $(REAL_MAKE_VERSION) $(REQUIRED_MAKE_VERSION))))
32 Wrong GNU Make version. See above for the version needed.
40 # If `sources' was defined by the parent makefile, undefine it so
41 # we will later get it from wildcard search in this directory.
42 ifneq "$(findstring env,$(origin sources))" ""
47 PATH := this definition should take precedence over $(oPATH)
48 ifeq ($(PATH),$(oPATH))
49 You must not use the -e flag when building the GNU C library.
54 ifndef +included-Makeconfig
55 include $(..)Makeconfig
58 # This variable is used in ``include $(o-iterator)'' after defining
59 # $(o-iterator-doit) to produce some desired rule using $o for the object
60 # suffix, and setting $(object-suffixes-left) to $(object-suffixes); a copy
61 # is produced for each object suffix in use.
62 o-iterator = $(patsubst %,$(..)o-iterator.mk,$(object-suffixes-left))
64 # Include any system-specific makefiles.
66 # This is here so things in sysdep Makefiles can easily depend on foo.h as
67 # appropriate and not worry about where foo.h comes from, which may be
68 # system dependent and not known by that Makefile.
69 vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
70 $(+sysdep_dirs) $(..)))
72 # The same is true for RPC source files.
73 vpath %.x $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
74 $(+sysdep_dirs) $(..)))
76 # Some sysdep makefiles use this to distinguish being included here from
77 # being included individually by a subdir makefile (hurd/Makefile needs this).
80 sysdep-makefiles := $(wildcard $(sysdirs:=/Makefile))
81 ifneq (,$(sysdep-makefiles))
82 include $(sysdep-makefiles)
86 # Reorder before-compile so that mach things come first, and hurd things
87 # second, before all else. The mach and hurd subdirectories have many
88 # generated header files which the much of rest of the library depends on,
89 # so it is best to build them first (and mach before hurd, at that).
90 before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\
92 $(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
95 # Even before that, we need abi-versions.h which is generated right here.
96 ifeq ($(build-shared),yes)
97 ifndef avoid-generated
98 before-compile := $(common-objpfx)abi-versions.h $(before-compile)
99 $(common-objpfx)abi-versions.h: $(..)scripts/abi-versions.awk \
100 $(common-objpfx)Versions.all
101 LC_ALL=C $(AWK) -v oldest_abi=$(oldest-abi) -f $^ > $@T
104 $(common-objpfx)%.latest: $(common-objpfx)abi-versions.h
105 sed -n '/ VERSION_$*_/{s/^.*_\([A-Z0-9_]*\).*$$/\1/;h;};$${g;p;}' \
106 $(common-objpfx)abi-versions.h > $@T
108 endif # avoid-generated
109 endif # $(build-shared) = yes
111 ifndef avoid-generated
112 before-compile := $(common-objpfx)libc-abis.h $(before-compile)
113 $(common-objpfx)libc-abis.h: $(common-objpfx)libc-abis.stamp; @:
114 $(common-objpfx)libc-abis.stamp: $(..)scripts/gen-libc-abis \
115 $(firstword $(wildcard $(sysdirs:=/libc-abis)) \
119 $(base-machine)-$(config-vendor)-$(config-os) \
120 < $(word 2,$^) > $(@:.stamp=.h)T
121 $(move-if-change) $(@:.stamp=.h)T $(@:.stamp=.h)
123 common-generated += $(common-objpfx)libc-abis.h
124 endif # avoid-generated
126 # Make sure the subdirectory for object files gets created.
128 ifeq (,$(wildcard $(objpfx).))
129 before-compile += $(objpfx).
131 $(make-target-directory)
135 # Remove existing files from `before-compile'. Things are added there when
136 # they must exist for dependency generation to work right, but once they
137 # exist there is no further need for every single file to depend on them,
138 # and those gratuitous dependencies result in many gratuitous
140 before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
142 # Don't let any before-compile file be an intermediate and get removed.
147 # We don't want $(common-objpfx) files to depend on miscellaneous stuff
150 common-before-compile := $(filter-out $(objpfx)%,$(before-compile))
152 common-before-compile = $(before-compile)
156 # If a makefile needs to do something conditional on something that
157 # can only be figured out from headers, write a FOO.make.c input
158 # file that uses cpp contructs and contains @@@ LINE @@@ for each LINE
159 # to emit in the generated makefile, and use -include $(common-objpfx)FOO.make.
161 # We only generate these in the top-level makefile, to avoid any weirdness
162 # from subdir-specific makefile tweaks creeping in on an update.
163 $(common-objpfx)%.make: $(..)%.make.c $(..)Makerules $(common-before-compile)
165 (echo '# Generated from $*.make.c by Makerules.'; \
166 $(CC) $(CFLAGS) $(CPPFLAGS) -E -DASSEMBLER $< \
167 -MD -MP -MT '$$(common-objpfx)$*.make' -MF $@.dT \
168 | sed -n '/@@@/{s/@@@[ ]*\(.*\)@@@/\1/;s/[ ]*$$//p;}'; \
169 echo 'common-generated += $(@F)'; \
170 sed $(sed-remove-objpfx) $(sed-remove-dotdot) $@.dT; \
176 sed-remove-dotdot := -e 's@ *\.\.\/\([^ \]*\)@ $$(..)\1@g' \
177 -e 's@^\.\.\/\([^ \]*\)@$$(..)\1@g'
179 sed-remove-dotdot := -e 's@ *\([^ \/$$][^ \]*\)@ $$(..)\1@g' \
180 -e 's@^\([^ \/$$][^ \]*\)@$$(..)\1@g'
184 ifdef gen-as-const-headers
185 # Generating headers for assembly constants.
186 # We need this defined early to get into before-compile before
187 # it's used in sysd-rules, below.
188 $(common-objpfx)%.h $(common-objpfx)%.h.d: $(..)scripts/gen-as-const.awk \
189 %.sym $(common-before-compile)
190 $(AWK) -f $< $(filter %.sym,$^) \
191 | $(CC) -S -o $(@:.h.d=.h)T3 $(CFLAGS) $(CPPFLAGS) -x c - \
192 -MD -MP -MF $(@:.h=.h.d)T -MT '$(@:.h=.h.d) $(@:.h.d=.h)'
193 sed -n 's/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*$$/#define \1 \2/p' \
194 $(@:.h.d=.h)T3 > $(@:.h.d=.h)T
196 sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
197 $(@:.h=.h.d)T > $(@:.h=.h.d)T2
199 mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d)
200 mv -f $(@:.h.d=.h)T $(@:.h.d=.h)
201 vpath %.sym $(sysdirs)
202 before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
204 tests += $(gen-as-const-headers:%.sym=test-as-const-%)
205 generated += $(gen-as-const-headers:%.sym=test-as-const-%.c)
206 $(objpfx)test-as-const-%.c: $(..)scripts/gen-as-const.awk $(..)Makerules \
207 %.sym $(common-objpfx)%.h
208 ($(AWK) '{ sub(/^/, "asconst_", $$2); print; }' $(filter %.h,$^); \
209 $(AWK) -v test=1 -f $< $(filter %.sym,$^); \
210 echo '#include "$(..)test-skeleton.c"') > $@T
214 # Generate an ordered list of implicit rules which find the source files in
215 # each sysdep directory. The old method was to use vpath to search all the
216 # sysdep directories. However, that had the problem that a .S file in a
217 # later directory would be chosen over a .c file in an earlier directory,
218 # which does not preserve the desired sysdeps ordering behavior.
220 # System-dependent makefiles can put in `inhibit-sysdep-asm' regexps
221 # matching sysdep directories whose assembly source files should be
224 -include $(common-objpfx)sysd-rules
225 ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
226 # The value of $(+sysdep_dirs) the sysd-rules was computed for
227 # differs from the one we are using now. So force a rebuild of sysd-rules.
228 sysd-rules-force = FORCE
231 $(common-objpfx)sysd-rules: $(..)scripts/sysd-rules.awk \
232 $(common-objpfx)config.make $(..)Makerules \
233 $(sysdep-makefiles) $(sysdep-makeconfigs) \
236 LC_ALL=C $(AWK) -f $< > $@T \
237 -v all_object_suffixes='$(all-object-suffixes)' \
238 -v inhibit_sysdep_asm='$(inhibit-sysdep-asm)' \
239 -v sysd_rules_patterns='$(sysd-rules-patterns)' \
240 -v config_sysdirs='$(config-sysdirs)'
243 ifndef sysd-rules-done
244 # Don't do deps until this exists, because it provides rules to make the deps.
248 define o-iterator-doit
249 $(objpfx)%$o: %.S $(before-compile); $$(compile-command.S)
251 object-suffixes-left := $(all-object-suffixes)
252 include $(o-iterator)
254 define o-iterator-doit
255 $(objpfx)%$o: %.c $(before-compile); $$(compile-command.c)
257 object-suffixes-left := $(all-object-suffixes)
258 include $(o-iterator)
260 define o-iterator-doit
261 $(objpfx)%$o: %.cc $(before-compile); $$(compile-command.cc)
263 object-suffixes-left := $(all-object-suffixes)
264 include $(o-iterator)
266 # Omit the objpfx rules when building in the source tree, because
267 # objpfx is empty and so these rules just override the ones above.
269 # Define first rules to find the source files in $(objpfx).
270 # Generated source files will end up there.
271 define o-iterator-doit
272 $(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S)
274 object-suffixes-left := $(all-object-suffixes)
275 include $(o-iterator)
277 define o-iterator-doit
278 $(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
280 object-suffixes-left := $(all-object-suffixes)
281 include $(o-iterator)
284 # Generate version maps, but wait until sysdep-subdirs is known
285 ifeq ($(sysd-sorted-done),t)
286 ifeq ($(build-shared),yes)
287 -include $(common-objpfx)sysd-versions
288 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
289 common-generated += $(version-maps)
290 postclean-generated += sysd-versions Versions.all abi-versions.h \
291 Versions.def Versions.v.i Versions.v
293 ifndef avoid-generated
294 ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
295 sysd-versions-force = FORCE
299 $(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
300 $(common-objpfx)Versions.v
301 LC_ALL=C $(AWK) -f $^ > $@T
304 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
305 $(common-objpfx)soversions.i \
306 $(common-objpfx)Versions.def
307 { while read which lib version setname; do \
308 test x"$$which" = xDEFAULT || continue; \
309 test -z "$$setname" || echo "$$lib : $$setname"; \
310 done < $(word 2,$^); \
312 } | LC_ALL=C $(AWK) -f $< > $@T
314 # See %.v/%.v.i implicit rules in Makeconfig.
315 $(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
316 $(wildcard $(sysdirs:%=%/Versions)) \
317 $(sysd-versions-force)
318 $(common-objpfx)sysd-versions: $(common-objpfx)Versions.all \
319 $(common-objpfx)Versions.v \
320 $(..)scripts/versions.awk
321 ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
323 | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
324 -v move_if_change='$(move-if-change)' \
328 endif # avoid-generated
329 endif # $(build-shared) = yes
330 endif # sysd-sorted-done
332 # Generate .dT files as we compile.
333 compile-mkdep-flags = -MD -MP -MF $@.dt -MT $@
334 compile-command.S = $(compile.S) $(OUTPUT_OPTION) $(compile-mkdep-flags)
335 compile-command.c = $(compile.c) $(OUTPUT_OPTION) $(compile-mkdep-flags)
336 compile-command.cc = $(compile.cc) $(OUTPUT_OPTION) $(compile-mkdep-flags)
338 # Like compile-mkdep-flags, but for use with $(BUILD_CC). We don't want to
339 # track system includes here, they may spuriously trigger an install rule,
340 # and would cause the check-local-headers test to fail.
341 native-compile-mkdep-flags = -MMD -MP -MF $@.dt -MT $@
343 # GCC can grok options after the file name, and it looks nicer that way.
344 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
345 compile.cc = $(CXX) $< -c $(CXXFLAGS) $(CPPFLAGS)
346 compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \
347 $(ASFLAGS) $(ASFLAGS-$(suffix $@))
348 COMPILE.c = $(CC) -c $(CFLAGS) $(CPPFLAGS)
349 COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \
350 $(ASFLAGS) $(ASFLAGS-$(suffix $@))
352 # We need this for the output to go in the right place. It will default to
353 # empty if make was configured to work with a cc that can't grok -c and -o
354 # together. You can't compile the C library with such a compiler.
355 OUTPUT_OPTION = -o $@
357 # This is the end of the pipeline for compiling generated C code.
358 compile-stdin.c = $(COMPILE.c) -o $@ -x c - $(compile-mkdep-flags)
360 # We need the $(CFLAGS) to be in there to have the right predefines during
361 # the dependency run for C sources. But having it for assembly sources can
362 # get the wrong predefines.
363 S-CPPFLAGS = -DASSEMBLER $(asm-CPPFLAGS)
366 $(make-target-directory)
367 $(+mkdep) $< $(if $(filter %.c,$<),$(CFLAGS)) \
368 $(CPPFLAGS) $($(patsubst .%,%,$(suffix $(<F)))-CPPFLAGS) | sed -e\
369 's,$(subst .,\.,$(@F:.d=.o)),$(foreach o,$(all-object-suffixes),$(@:.d=$o)) $@,' \
370 $(sed-remove-objpfx) $(sed-remove-dotdot) > $(@:.d=.T)
371 mv -f $(@:.d=.T) $@ $(generate-md5)
375 # Continuation lines here are dangerous because they introduce spaces!
376 define sed-remove-objpfx
377 -e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
378 -e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g'
382 # Modify the list of routines we build for different targets
384 ifeq (yes,$(build-shared))
385 ifndef libc.so-version
386 # Undefine this because it can't work when we libc.so is unversioned.
387 static-only-routines =
391 elide-routines.oS += $(filter-out $(static-only-routines),\
392 $(routines) $(aux) $(sysdep_routines))
393 elide-routines.os += $(static-only-routines)
395 # If we have versioned code we don't need the old versions in any of the
397 elide-routines.o += $(shared-only-routines)
398 elide-routines.op += $(shared-only-routines)
399 elide-routines.og += $(shared-only-routines)
401 # Shared library building.
403 ifeq (yes,$(build-shared))
405 # Reference map file only when shared libraries are built and a map file name
407 ifeq ($(build-shared),yes)
408 map-file = $(firstword $($(@F:.so=-map)) \
409 $(addprefix $(common-objpfx), \
410 $(filter $(@F:.so=.map),$(version-maps))))
411 load-map-file = $(map-file:%=-Wl,--version-script=%)
414 # Compiler arguments to use to link a shared object with libc and
415 # ld.so. This is intended to be as similar as possible to a default
416 # link with an installed libc.
417 link-libc-args = -Wl,--start-group \
419 $(common-objpfx)libc_nonshared.a \
420 $(as-needed) $(elfobjdir)/ld.so $(no-as-needed) \
423 # The corresponding shared libc to use. This may be modified for a
425 libc-for-link = $(common-objpfx)libc.so
427 # The corresponding dependencies. As these are used in dependencies,
428 # not just commands, they cannot use target-specific variables so need
429 # to name both possible libc.so objects.
430 link-libc-deps = $(common-objpfx)libc.so $(common-objpfx)linkobj/libc.so \
431 $(common-objpfx)libc_nonshared.a $(elfobjdir)/ld.so
433 # Pattern rule to build a shared object from an archive of PIC objects.
434 # This must come after the installation rules so Make doesn't try to
435 # build shared libraries in place from the installed *_pic.a files.
436 # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
437 # on other shared objects. The linking with libc and ld.so is intended
438 # to be as similar as possible to a default link with an installed libc.
439 lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(+interp) $(link-libc-deps)
440 $(build-shlib) $(link-libc-args)
442 define build-shlib-helper
443 $(LINK.o) -shared $(static-libgcc) -Wl,-O1 $(sysdep-LDFLAGS) \
444 $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) $(rtld-LDFLAGS) \
445 $(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \
446 $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
447 -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
448 $(LDFLAGS.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
449 -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
452 ifeq (yes,$(use-default-link))
453 # If the linker is good enough, we can let it use its default linker script.
457 # binutils only position loadable notes into the first page for binaries,
458 # not for shared objects
459 $(common-objpfx)shlib.lds: $(common-objpfx)config.make $(..)Makerules
460 $(LINK.o) -shared -Wl,-O1 \
461 -nostdlib -nostartfiles \
462 $(sysdep-LDFLAGS) $(rtld-LDFLAGS) $(LDFLAGS.so) \
463 -Wl,--verbose 2>&1 | \
465 -e '/^=========/,/^=========/!d;/^=========/d' \
466 $(if $(filter yes,$(have-hash-style)), \
467 -e 's/^.*\.gnu\.hash[ ]*:.*$$/ .note.ABI-tag : { *(.note.ABI-tag) } &/' \
468 -e '/^[ ]*\.hash[ ]*:.*$$/{h;d;}' \
469 -e '/DATA_SEGMENT_ALIGN/{H;g}' \
471 -e 's/^.*\.hash[ ]*:.*$$/ .note.ABI-tag : { *(.note.ABI-tag) } &/' \
473 -e 's/^.*\*(\.dynbss).*$$/& \
474 PROVIDE(__start___libc_freeres_ptrs = .); \
475 *(__libc_freeres_ptrs) \
476 PROVIDE(__stop___libc_freeres_ptrs = .);/'\
477 -e 's@^.*\*(\.jcr).*$$@& \
478 PROVIDE(__start___libc_subfreeres = .);\
479 __libc_subfreeres : { *(__libc_subfreeres) }\
480 PROVIDE(__stop___libc_subfreeres = .);\
481 PROVIDE(__start___libc_atexit = .);\
482 __libc_atexit : { *(__libc_atexit) }\
483 PROVIDE(__stop___libc_atexit = .);\
484 PROVIDE(__start___libc_thread_subfreeres = .);\
485 __libc_thread_subfreeres : { *(__libc_thread_subfreeres) }\
486 PROVIDE(__stop___libc_thread_subfreeres = .);\
487 /DISCARD/ : { *(.gnu.glibc-stub.*) }@'
490 common-generated += shlib.lds
492 shlib-lds = $(common-objpfx)shlib.lds
493 shlib-lds-flags = -T $(shlib-lds)
497 $(build-shlib-helper) -o $@ $(shlib-lds-flags) \
498 $(csu-objpfx)abi-note.o $(build-shlib-objlist)
501 define build-module-helper
502 $(LINK.o) -shared $(static-libgcc) $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
503 $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
504 -B$(csu-objpfx) $(load-map-file) \
505 $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
506 -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
509 # This macro is similar to build-shlib but it does not define a soname
510 # and it does not depend on the destination name to start with `lib'.
511 # binutils only position loadable notes into the first page for binaries,
512 # not for shared objects
514 $(build-module-helper) -o $@ $(shlib-lds-flags) \
515 $(csu-objpfx)abi-note.o $(build-module-objlist) $(link-libc-args)
517 define build-module-asneeded
518 $(build-module-helper) -o $@ $(shlib-lds-flags) \
519 $(csu-objpfx)abi-note.o \
520 -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed \
524 build-module-helper-objlist = \
525 $(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\
526 $(filter-out %.lds $(map-file) $(+preinit) $(+postinit) \
527 $(link-libc-deps),$^))
529 build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so)
530 build-shlib-objlist = $(build-module-helper-objlist) \
531 $(LDLIBS-$(@F:lib%.so=%).so)
533 # Don't try to use -lc when making libc.so itself.
534 # Also omits crti.o and crtn.o, which we do not want
535 # since we define our own `.init' section specially.
536 LDFLAGS-c.so = -nostdlib -nostartfiles
537 # But we still want to link libc.so against $(libc.so-gnulib).
538 LDLIBS-c.so += $(libc.so-gnulib)
539 # Give libc.so an entry point and make it directly runnable itself.
540 LDFLAGS-c.so += -e __libc_main
541 # If lazy relocation is disabled add the -z now flag.
542 ifeq ($(bind-now),yes)
543 LDFLAGS-c.so += -Wl,-z,now
545 # Pre-link the objects of libc_pic.a so that we can locally resolve
546 # COMMON symbols before we link against ld.so. This is because ld.so
547 # contains some of libc_pic.a already, which will prevent the COMMONs
548 # from being allocated in libc.so, which introduces evil dependencies
549 # between libc.so and ld.so, which can make it impossible to upgrade.
550 $(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
551 $(LINK.o) -nostdlib -nostartfiles -r -o $@ \
552 $(LDFLAGS-c_pic.os) -Wl,-d $(whole-archive) $^ -o $@
554 ifeq (,$(strip $(shlib-lds-flags)))
555 # Generate a list of -R options to excise .gnu.glibc-stub.* sections.
556 $(common-objpfx)libc_pic.opts: $(common-objpfx)libc_pic.os
558 $(AWK) '$$2 ~ /\.gnu\.glibc-stub\./ { print "-R", $$2 }' \
561 # Apply those -R options.
562 $(common-objpfx)libc_pic.os.clean: $(common-objpfx)libc_pic.opts \
563 $(common-objpfx)libc_pic.os
565 generated += libc_pic.opts libc_pic.os.clean
567 libc_pic_clean := .clean
570 # Build a possibly-modified version of libc_pic.a for use in building
572 ifeq (,$(filter sunrpc,$(subdirs)))
573 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a
574 $(make-target-directory)
577 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a \
578 $(common-objpfx)sunrpc/librpc_compat_pic.a
579 $(make-target-directory)
580 (cd $(common-objpfx)linkobj; \
581 $(AR) x ../libc_pic.a; \
582 rm $$($(AR) t ../sunrpc/librpc_compat_pic.a | sed 's/^compat-//'); \
583 $(AR) x ../sunrpc/librpc_compat_pic.a; \
584 $(AR) cr libc_pic.a *.os; \
586 endif # $(subdirs) contains sunrpc
588 # Clear link-libc-deps for the libc.so libraries so build-shlibs does not
589 # filter ld.so out of the list of linked objects.
590 $(common-objpfx)libc.so: link-libc-deps = # empty
591 $(common-objpfx)linkobj/libc.so: link-libc-deps = # empty
593 # Use our own special initializer and finalizer files for the libc.so
595 $(common-objpfx)libc.so: $(elfobjdir)/soinit.os \
596 $(common-objpfx)libc_pic.os$(libc_pic_clean) \
597 $(elfobjdir)/sofini.os \
598 $(elfobjdir)/interp.os \
603 $(common-objpfx)linkobj/libc.so: $(elfobjdir)/soinit.os \
604 $(common-objpfx)linkobj/libc_pic.a \
605 $(elfobjdir)/sofini.os \
606 $(elfobjdir)/interp.os \
611 ifeq ($(build-shared),yes)
612 $(common-objpfx)libc.so: $(common-objpfx)libc.map
614 common-generated += libc.so libc_pic.os
615 ifdef libc.so-version
616 $(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
618 common-generated += libc.so$(libc.so-version)
622 # Figure out the source filenames in this directory.
624 override sources := $(addsuffix .c,\
625 $(filter-out $(elided-routines),\
628 sysdep_routines := $(sysdep_routines)
630 headers := $(headers) $(sysdep_headers)
632 # This is the list of all object files, gotten by
633 # replacing every ".c" in `sources' with a ".o".
634 override objects := $(addprefix $(objpfx),$(sources:.c=.o))
637 # The makefile may define $(extra-libs) with `libfoo libbar'
638 # to build libfoo.a et al from the modules listed in $(libfoo-routines).
640 # extra-lib.mk is included once for each extra lib to define rules
641 # to build it, and to add its objects to the various variables.
642 # During its evaluation, $(lib) is set to the name of the library.
643 extra-libs-left := $(extra-libs)
644 include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
648 # The makefile may define $(modules-names) to build additional modules.
649 # These are built with $(build-module), except any in $(modules-names-nobuild).
651 # extra-lib.mk is included once for each extra lib to define rules
652 # to build it, and to add its objects to the various variables.
653 # During its evaluation, $(lib) is set to the name of the library.
654 extra-modules-left := $(modules-names)
655 include $(patsubst %,$(..)extra-modules.mk,$(modules-names))
657 extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names))
658 $(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \
659 $(objpfx)%.os $(shlib-lds) $(link-libs-deps)
663 +depfiles := $(sources:.c=.d) \
664 $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \
665 $(patsubst %.oS,%.d,$(filter %.oS,$(extra-objs))) \
666 $(patsubst %.o,%.d,$(filter %.o,$(extra-test-objs:.os=.o))) \
667 $(addsuffix .d,$(tests) $(xtests) $(test-srcs))
668 ifeq ($(build-programs),yes)
669 +depfiles += $(addsuffix .d,$(others) $(sysdep-others))
671 +depfiles := $(addprefix $(objpfx),\
672 $(filter-out $(addsuffix .d,$(omit-deps)),\
674 all-dt-files := $(foreach o,$(object-suffixes-for-libc),$(+depfiles:.d=$o.dt))
675 +depfiles := $(patsubst %.dt,%.d,$(wildcard $(all-dt-files))) \
676 $(wildcard $(all-dt-files:.dt=.d))
678 # This is a funny rule in that it removes its input file.
680 @sed $(sed-remove-objpfx) $< > $(@:.d=.T) && \
681 mv -f $(@:.d=.T) $@ && \
684 # Avoid the .h.d files for any .sym files whose .h files don't exist yet.
685 # They will be generated when they're needed, and trying too early won't work.
686 +gen-as-const := $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
687 +depfiles += $(addsuffix .d,$(filter $(wildcard $(+gen-as-const)),\
692 -include $(+depfiles)
696 # Maximize efficiency by minimizing the number of rules.
697 .SUFFIXES: # Clear the suffix list. We don't use suffix rules.
698 # Don't define any builtin rules.
699 MAKEFLAGS := $(MAKEFLAGS)r
701 # Generic rule for making directories.
703 # mkdir isn't smart enough to strip a trailing /.
704 # We always require a mkdir which supports the -p option to avoid error
705 # messages in case of races.
708 # Make sure that object files are not removed
709 # when they are intermediates between sources and library members.
710 .PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes))
712 # Make sure that the parent library archive is never removed.
713 .PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
715 # Use the verbose option of ar and tar when not running silently.
716 ifeq "$(findstring s,$(MAKEFLAGS))" "" # if not -s
722 ARFLAGS := r$(verbose)
723 CREATE_ARFLAGS := cru$(verbose)
725 # This makes all the object files in the parent library archive.
727 .PHONY: lib lib-noranlib
728 lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
729 lib-noranlib: libobjs
731 # For object-suffix $o, the list of objects with that suffix.
732 # Makefiles can define `elide-routines.so = foo' to leave foo.so out.
733 o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
734 $(elide-routines$o)),\
736 $(addprefix $(objpfx),$(o-objects$o))
738 others: $(addprefix $(objpfx),$(install-lib))
742 # Create the stamp$o files to keep the parent makefile happy.
743 subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
744 $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o):
745 $(make-target-directory)
749 # Define explicit rules to update each $(objpfx)stamp.SUFFIX
750 # timestamp file; these rules (one explicit rule is generated for each
751 # object suffix) write a list of objects to update in the stamp file.
752 # The parent will then actually add them all to the archive in the
753 # archive rule, below.
754 define o-iterator-doit
755 $(objpfx)stamp$o: $(o-objects); $$(do-stamp)
758 $(make-target-directory)
759 echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T
762 object-suffixes-left := $(object-suffixes-for-libc)
763 include $(o-iterator)
767 # Now define explicit rules to build the library archives; these depend
768 # on the stamp files built above.
769 define o-iterator-doit
770 $(common-objpfx)$(patsubst %,$(libtype$o),c): \
771 $(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib)
774 cd $(common-objdir) && \
775 $(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)`
777 subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%)
778 subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
780 $(subdirs-stamps): subdir_lib;
782 object-suffixes-left = $(object-suffixes-for-libc)
783 include $(o-iterator)
786 # This makes all the object files.
787 .PHONY: objects objs libobjs extra-objs
788 objects objs: libobjs extra-objs
789 libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
790 extra-objs: $(addprefix $(objpfx),$(extra-objs))
792 # Canned sequence for building an extra library archive.
793 define build-extra-lib
794 $(patsubst %/,cd % &&,$(objpfx)) \
795 $(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \
796 $(patsubst $(objpfx)%,%,$^)
801 .PHONY: force-install
804 # $(install-lib) are installed from the object directory into $(libdir);
805 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
806 # unless they also appear in $(non-lib.a). $(install-data) are installed as
807 # they are into $(datadir). $(headers) are installed as they are in
808 # $(includedir). $(install-bin), $(install-bin-script) and $(install-sbin)
809 # are installed from the object directory into $(bindir), $(bindir) and
810 # $(sbindir), respectively. $(install-others) and $(install-others-programs)
811 # are absolute path names of files to install; rules to install them are
814 # The simple library name to install libc.a under.
815 # This could be defined by a sysdep Makefile.
821 $(make-target-directory)
822 $(INSTALL_DATA) $< $@
825 # Make the target directory if it doesn't exist, using the `mkinstalldirs'
826 # script that does `mkdir -p' even if `mkdir' doesn't support that flag.
827 define make-target-directory
828 $(addprefix $(..)./scripts/mkinstalldirs ,\
829 $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
832 # Any directory (parent or subdir) should install libc.a; this way
833 # "make install" in a subdir is guaranteed to install everything it changes.
834 installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
835 $(inst_libdir)/$(patsubst %,$(libtype$o),\
836 $(libprefix)$(libc-name)))
837 install: $(installed-libcs)
838 $(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
839 $(make-target-directory)
840 $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
842 define do-install-program
843 $(make-target-directory)
844 $(INSTALL_PROGRAM) $< $@.new
848 define do-install-script
849 $(make-target-directory)
850 $(INSTALL_SCRIPT) $< $@.new
854 install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
855 install-lib := $(filter-out %.so %_pic.a,$(install-lib))
857 ifeq (yes,$(build-shared))
858 # Find which .so's have versions.
859 versioned := $(strip $(foreach so,$(install-lib.so),\
860 $(patsubst %,$(so),$($(so)-version))))
862 install-lib.so-versioned := $(filter $(versioned), $(install-lib.so))
863 install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so))
865 # For versioned libraries, we install three files:
866 # $(inst_libdir)/libfoo.so -- for linking, symlink or ld script
867 # $(inst_slibdir)/libfoo.so.NN -- for loading by SONAME, symlink
868 # $(inst_slibdir)/libfoo-X.Y.Z.so -- the real shared object file
869 lib-version := $(firstword $($(subdir)-version) $(version))
870 install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \
871 $(foreach L,$(install-lib.so-versioned),\
873 $(inst_slibdir)/$(L:.so=)-$(lib-version).so \
874 $(inst_slibdir)/$L$($L-version))
876 # Install all the unversioned shared libraries.
877 $(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \
878 $(objpfx)%.so $(+force)
879 $(do-install-program)
881 ifneq ($(findstring -s,$(LN_S)),)
884 $(SHELL) $(..)scripts/rellns-sh $< $@.new
888 # If we have no symbolic links don't bother with rellns-sh.
896 ifeq (yes,$(build-shared))
897 ifeq (no,$(cross-compiling))
898 symbolic-link-prog := $(common-objpfx)elf/sln
899 symbolic-link-list := $(common-objpfx)elf/symlink.list
900 define make-shlib-link
901 echo `$(..)scripts/rellns-sh -p $< $@` $@ >> $(symbolic-link-list)
903 else # cross-compiling
904 # We need a definition that can be used by elf/Makefile's install rules.
905 symbolic-link-prog = $(LN_S)
908 ifndef make-shlib-link
909 define make-shlib-link
911 $(LN_S) `$(..)scripts/rellns-sh -p $< $@` $@
915 ifdef libc.so-version
916 # For a library specified to be version N, install three files:
917 # libc.so -> libc.so.N (e.g. libc.so.6)
918 # libc.so.6 -> libc-VERSION.so (e.g. libc-1.10.so)
920 $(inst_slibdir)/libc.so$(libc.so-version): $(inst_slibdir)/libc-$(version).so \
923 $(inst_slibdir)/libc-$(version).so: $(common-objpfx)libc.so $(+force)
924 $(do-install-program)
925 install: $(inst_slibdir)/libc.so$(libc.so-version)
927 # This fragment of linker script gives the OUTPUT_FORMAT statement
928 # for the configuration we are building. We put this statement into
929 # the linker scripts we install for -lc et al so that they will not be
930 # used by a link for a different format on a multi-architecture system.
931 $(common-objpfx)format.lds: $(..)scripts/output-format.sed \
932 $(common-objpfx)config.make \
933 $(common-objpfx)config.h $(..)Makerules
934 ifneq (unknown,$(output-format))
935 echo > $@.new 'OUTPUT_FORMAT($(output-format))'
937 $(LINK.o) -shared $(sysdep-LDFLAGS) $(rtld-LDFLAGS) $(LDFLAGS.so) \
938 -x c /dev/null -o $@.so -Wl,--verbose -v 2>&1 \
939 | sed -n -f $< > $@.new
944 common-generated += format.lds
947 # What we install as libc.so for programs to link against is in fact a
948 # link script. It contains references for the various libraries we need.
949 # The libc.so object is not complete since some functions are only defined
950 # in libc_nonshared.a.
951 # We need to use absolute paths since otherwise local copies (if they exist)
952 # of the files are taken by the linker.
953 install: $(inst_libdir)/libc.so
954 $(inst_libdir)/libc.so: $(common-objpfx)format.lds \
955 $(common-objpfx)libc.so$(libc.so-version) \
956 $(inst_libdir)/$(patsubst %,$(libtype.oS),\
957 $(libprefix)$(libc-name)) \
959 (echo '/* GNU ld script';\
960 echo ' Use the shared library, but some functions are only in';\
961 echo ' the static library, so try that secondarily. */';\
963 echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \
964 '$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\
965 ' AS_NEEDED (' $(rtlddir)/$(rtld-installed-name) ') )' \
972 install: $(inst_slibdir)/libc.so
973 $(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force)
974 $(do-install-program)
977 ifneq (,$(versioned))
978 # Produce three sets of rules as above for all the smaller versioned libraries.
980 define o-iterator-doit
981 $(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link)
983 object-suffixes-left := $(filter-out $(install-lib-ldscripts),$(versioned))
984 ifneq (,$(object-suffixes-left))
985 include $(o-iterator)
988 # Make symlinks in the build directory, because the versioned names might
989 # be referenced by a DT_NEEDED in another library.
990 define o-iterator-doit
991 $(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
993 object-suffixes-left := $(versioned)
994 include $(o-iterator)
996 generated += $(foreach o,$(versioned),$o$($o-version))
998 ifeq (,$($(subdir)-version))
999 define o-iterator-doit
1000 $(inst_slibdir)/$o$($o-version): $(inst_slibdir)/$(o:.so=)-$(version).so \
1004 object-suffixes-left := $(versioned)
1005 include $(o-iterator)
1007 define o-iterator-doit
1008 $(inst_slibdir)/$(o:.so=)-$(version).so: $(objpfx)$o $(+force);
1009 $$(do-install-program)
1011 object-suffixes-left := $(versioned)
1012 include $(o-iterator)
1014 define o-iterator-doit
1015 $(inst_slibdir)/$o$($o-version): \
1016 $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so $(+force);
1019 object-suffixes-left := $(versioned)
1020 include $(o-iterator)
1022 define o-iterator-doit
1023 $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so: $(objpfx)$o $(+force);
1024 $$(do-install-program)
1026 object-suffixes-left := $(versioned)
1027 include $(o-iterator)
1031 define do-install-so
1032 $(do-install-program)
1033 $(patsubst %,ln -s -f $(@F) $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
1034 $(filter-out %.so,$@))
1037 so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
1038 $(foreach v,$(so-versions),\
1039 $(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \
1042 $(foreach v,$(so-versions),\
1043 $(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force)
1048 $(addprefix $(inst_bindir)/,$(install-bin)): \
1049 $(inst_bindir)/%: $(objpfx)% $(+force)
1050 $(do-install-program)
1052 ifdef install-bin-script
1053 $(addprefix $(inst_bindir)/,$(install-bin-script)): \
1054 $(inst_bindir)/%: $(objpfx)% $(+force)
1055 $(do-install-script)
1057 ifdef install-rootsbin
1058 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \
1059 $(inst_rootsbindir)/%: $(objpfx)% $(+force)
1060 $(do-install-program)
1063 $(addprefix $(inst_sbindir)/,$(install-sbin)): \
1064 $(inst_sbindir)/%: $(objpfx)% $(+force)
1065 $(do-install-program)
1068 install-lib.a := $(filter lib%.a,$(install-lib))
1069 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
1070 ifdef install-lib-non.a
1071 $(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
1072 $(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force)
1076 $(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \
1077 $(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force)
1082 $(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force)
1085 headers := $(strip $(headers))
1087 # This implicit rule installs headers from the source directory.
1088 # It may be ignored in preference to rules from sysd-rules to find
1089 # headers in the sysdeps tree.
1090 $(inst_includedir)/%.h: $(objpfx)%.h $(+force)
1092 $(inst_includedir)/%.h: $(common-objpfx)%.h $(+force)
1094 $(inst_includedir)/%.h: %.h $(+force)
1096 $(inst_includedir)/%.h: $(..)include/%.h $(+force)
1098 headers-nonh := $(filter-out %.h,$(headers))
1100 $(addprefix $(inst_includedir)/,$(headers-nonh)): $(inst_includedir)/%: \
1103 endif # headers-nonh
1106 .PHONY: install-bin-nosubdir install-bin-script-nosubdir \
1107 install-rootsbin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
1108 install-data-nosubdir install-headers-nosubdir
1109 install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin))
1110 install-bin-script-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin-script))
1111 install-rootsbin-nosubdir: \
1112 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin))
1113 install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin))
1114 install-lib-nosubdir: $(addprefix $(inst_libdir)/,\
1115 $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
1116 $(addprefix $(libprefix),$(install-lib-non.a)))
1117 install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data))
1118 install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers))
1119 install-others-nosubdir: $(install-others)
1120 install-others-programs-nosubdir: $(install-others-programs)
1122 # We need all the `-nosubdir' targets so that `install' in the parent
1123 # doesn't depend on several things which each iterate over the subdirs.
1124 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
1125 # subroutine. Then in the parent `install-FOO' also causes subdir makes.
1126 install-%:: install-%-nosubdir ;
1128 .PHONY: install install-no-libc.a-nosubdir
1129 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir \
1130 install-lib-nosubdir install-others-nosubdir
1131 ifeq ($(build-programs),yes)
1132 install-no-libc.a-nosubdir: install-bin-nosubdir install-bin-script-nosubdir \
1133 install-rootsbin-nosubdir install-sbin-nosubdir \
1134 install-others-programs-nosubdir
1136 install: install-no-libc.a-nosubdir
1138 # Command to compile $< using the native libraries.
1139 define native-compile
1140 $(make-target-directory)
1141 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
1142 $< $(OUTPUT_OPTION) $(BUILD_LDFLAGS)
1145 # We always want to use configuration definitions.
1146 ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) -D_GNU_SOURCE \
1147 -DIS_IN_build -include $(common-objpfx)config.h
1149 # Support the GNU standard name for this target.
1152 # Special target to run tests which cannot be run unconditionally.
1153 # Maintainers should use this target.
1157 all-nonlib = $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) $(others))
1158 ifneq (,$(all-nonlib))
1159 cpp-srcs-left = $(all-nonlib:=.c) $(all-nonlib:=.cc)
1161 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
1164 # The include magic above causes those files to use this variable for flags.
1165 CPPFLAGS-nonlib = -DNOT_IN_libc=1
1168 ifeq ($(build-shared),yes)
1169 # Generate normalized lists of symbols, versions, and data sizes.
1170 # This is handy for checking against existing library binaries.
1172 %.symlist: $(..)scripts/abilist.awk %.dynsym
1173 LC_ALL=C $(AWK) -f $^ > $@T
1177 LC_ALL=C $(OBJDUMP) --dynamic-syms $< > $@T
1180 # A sysdeps/.../Makefile can set abilist-pattern to something like
1181 # %-foo.abilist to look for libc-foo.abilist instead of libc.abilist.
1182 # This makes sense if multiple ABIs can be most cleanly supported by a
1183 # configuration without using separate sysdeps directories for each.
1184 ifdef abilist-pattern
1185 vpath $(abilist-pattern) $(+sysdep_dirs)
1188 vpath %.abilist $(+sysdep_dirs)
1190 # The .PRECIOUS rule prevents the files built by an implicit rule whose
1191 # target pattern is %.symlist from being considered "intermediate files"
1192 # and automatically removed. We only want these files to be removed by
1193 # 'make clean', which is handled by the 'generated' variable.
1194 .PRECIOUS: %.symlist
1195 generated += $(extra-libs:=.symlist)
1197 ifdef abilist-pattern
1198 $(objpfx)check-abi-%.out: $(common-objpfx)config.make $(abilist-pattern) \
1200 $(check-abi-pattern); \
1202 $(objpfx)check-abi-%.out: $(common-objpfx)config.make $(abilist-pattern) \
1203 $(common-objpfx)%.symlist
1204 $(check-abi-pattern); \
1207 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1211 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1212 $(common-objpfx)%.symlist
1215 define check-abi-pattern
1216 diff -p -U 0 $(filter $(abilist-pattern),$^) $(filter %.symlist,$^) \
1220 diff -p -U 0 $(filter %.abilist,$^) $(filter %.symlist,$^) > $@
1223 ifdef abilist-pattern
1224 update-abi-%: $(objpfx)%.symlist $(abilist-pattern)
1225 $(update-abi-pattern)
1226 update-abi-%: $(common-objpfx)%.symlist $(abilist-pattern)
1227 $(update-abi-pattern)
1229 update-abi-%: $(objpfx)%.symlist %.abilist
1231 update-abi-%: $(common-objpfx)%.symlist %.abilist
1233 define update-abi-pattern
1234 @if cmp -s $^ 2> /dev/null; \
1236 echo '+++ $(filter $(abilist-pattern),$^) is unchanged'; \
1238 echo '*** Now check $(filter $(abilist-pattern),$^) changes for correctness ***'; \
1242 @if cmp -s $^ 2> /dev/null; \
1244 echo '+++ $(filter %.abilist,$^) is unchanged'; \
1246 echo '*** Now check $(filter %.abilist,$^) changes for correctness ***'; \
1250 .PHONY: update-abi check-abi
1251 update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned))
1252 check-abi-list = $(patsubst %.so,$(objpfx)check-abi-%.out, \
1253 $(install-lib.so-versioned))
1254 check-abi: $(check-abi-list)
1256 subdir_check-abi: check-abi
1257 subdir_update-abi: update-abi
1259 check-abi: subdir_check-abi
1260 update-abi: subdir_update-abi
1263 ifeq ($(subdir),elf)
1264 check-abi: $(objpfx)check-abi-libc.out
1265 tests-special += $(objpfx)check-abi-libc.out
1266 update-abi: update-abi-libc
1267 common-generated += libc.symlist
1270 ifeq ($(build-shared),yes)
1272 tests-special += $(check-abi-list)
1278 # These will have been set by sysdeps/posix/Makefile.
1284 stdio_lim = $(common-objpfx)bits/stdio_lim.h
1286 $(stdio_lim:lim.h=%.h) $(stdio_lim:lim.h=%.d): $(stdio_lim:lim.h=%.st); @:
1287 $(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \
1288 $(common-objpfx)config.make
1289 $(make-target-directory)
1290 { echo '#include "$(..)posix/bits/posix1_lim.h"'; \
1291 echo '#define _LIBC 1'; \
1292 echo '#include "$(..)misc/sys/uio.h"'; } | \
1293 $(CC) -E -dM -MD -MP -MF $(@:st=dT) -MT '$(@:st=h) $(@:st=d)' \
1294 $(CPPUNDEFS) $(+includes) -xc - -o $(@:st=hT)
1295 sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
1296 $(@:st=dT) > $(@:st=dt)
1297 mv -f $(@:st=dt) $(@:st=d)
1298 fopen_max=`sed -n 's/^#define OPEN_MAX //1p' $(@:st=hT)`; \
1299 filename_max=`sed -n 's/^#define PATH_MAX //1p' $(@:st=hT)`; \
1300 iov_max=`sed -n 's/^#define UIO_MAXIOV //p' $(@:st=hT)`; \
1301 fopen_max=$${fopen_max:-16}; \
1302 filename_max=$${filename_max:-1024}; \
1303 if [ -z "$$iov_max" ]; then \
1304 define_iov_max="# undef IOV_MAX"; \
1306 define_iov_max="# define IOV_MAX $$iov_max"; \
1308 sed -e "s/@FOPEN_MAX@/$$fopen_max/" \
1309 -e "s/@FILENAME_MAX@/$$filename_max/" \
1310 -e "s/@L_tmpnam@/$(L_tmpnam)/" \
1311 -e "s/@TMP_MAX@/$(TMP_MAX)/" \
1312 -e "s/@L_ctermid@/$(L_ctermid)/" \
1313 -e "s/@L_cuserid@/$(L_cuserid)/" \
1314 -e "s/@define_IOV_MAX@/$$define_iov_max/" \
1316 $(move-if-change) $(@:st=h.new) $(@:st=h)
1317 # Remove these last so that they can be examined if something went wrong.
1318 rm -f $(@:st=hT) $(@:st=dT) $(@:st=dt)
1322 -include $(stdio_lim:h=d)
1324 common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st
1328 .PHONY: echo-headers
1332 %.bz2: %; bzip2 -9vk $<
1333 %.gz: %; gzip -9vnc $< > $@.new && mv -f $@.new $@
1334 %.xz: %; xz -9evk $<
1336 # Common cleaning targets.
1338 .PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean
1340 mostlyclean: common-mostlyclean
1343 -rm -f $(addprefix $(objpfx),$(addsuffix .out,$(tests) $(xtests) \
1345 $(addsuffix .test-result,$(tests) \
1349 # Remove the object files.
1351 -rm -f $(addprefix $(objpfx),$(tests) $(xtests) $(test-srcs) \
1352 $(others) $(sysdep-others) stubs \
1353 $(addsuffix .o,$(tests) $(xtests) \
1354 $(test-srcs) $(others) \
1356 $(addsuffix .out,$(tests) $(xtests) \
1358 $(addsuffix .test-result,$(tests) \
1361 -rm -f $(addprefix $(objpfx),$(extra-objs) $(extra-test-objs) \
1362 $(install-lib) $(install-lib.so) \
1363 $(install-lib.so:%.so=%_pic.a))
1365 -rm -f $(objpfx)rtld-*.os
1368 $(foreach o,$(object-suffixes-for-libc),
1369 -rm -f $(objpfx)stamp$o $(o-objects))
1372 # Also remove the dependencies and generated source files.
1373 common-clean: common-mostlyclean
1374 -rm -f $(addprefix $(objpfx),$(generated))
1375 -rm -f $(objpfx)*.d $(objpfx)*.dt
1376 -rm -fr $(addprefix $(objpfx),$(generated-dirs))
1377 -rm -f $(addprefix $(common-objpfx),$(common-generated))
1378 -rm -f $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
1380 # Produce a file `stubs' which contains `#define __stub_FUNCTION'
1381 # for each function which is a stub.
1384 .PHONY: stubs # The parent Makefile calls this target.
1385 stubs: $(objpfx)stubs
1387 objs-for-stubs := $(foreach o,$(object-suffixes-for-libc),$(o-objects)) \
1388 $(addprefix $(objpfx),$(extra-objs))
1389 $(objpfx)stubs: $(objs-for-stubs)
1390 ifneq (,$(strip $(objs-for-stubs)))
1391 (cd $(objpfx).; $(OBJDUMP) -h $(patsubst $(objpfx)%,%,$^)) | \
1392 $(AWK) '/\.gnu\.glibc-stub\./ { \
1393 sub(/\.gnu\.glibc-stub\./, "", $$2); \
1395 END { for (s in stubs) print "#define __stub_" s }' > $@T
1401 ifneq (,$(strip $(gpl2lgpl)))
1402 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
1403 # Snarf from the master source and frob the copying notice.
1404 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
1406 # So I don't edit them by mistake.