1 # Copyright (C) 1991-2018 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) -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
109 # first-versions.h and ldbl-compat-choose.h provide macros used in
110 # various symbol versioning macro calls.
111 before-compile := $(common-objpfx)first-versions.h \
112 $(common-objpfx)ldbl-compat-choose.h $(before-compile)
113 $(common-objpfx)first-versions.h: $(common-objpfx)versions.stmp
114 $(common-objpfx)ldbl-compat-choose.h: $(common-objpfx)versions.stmp
115 endif # avoid-generated
116 endif # $(build-shared) = yes
118 ifndef avoid-generated
120 # If C++ headers <cstdlib> or <cmath> are used, GCC 6 will include
121 # /usr/include/stdlib.h or /usr/include/math.h from "#include_next"
122 # (instead of stdlib/stdlib.h or math/math.h in the glibc source
123 # directory), and this turns up as a make dependency. An implicit
124 # rule will kick in and make will try to install stdlib/stdlib.h or
125 # math/math.h as /usr/include/stdlib.h or /usr/include/math.h because
126 # the target is out of date. We make a copy of <cstdlib> and <cmath>
127 # in the glibc build directory so that stdlib/stdlib.h and math/math.h
128 # will be used instead of /usr/include/stdlib.h and /usr/include/math.h.
129 before-compile := $(common-objpfx)cstdlib $(common-objpfx)cmath \
131 $(common-objpfx)cstdlib: $(c++-cstdlib-header)
132 $(INSTALL_DATA) $< $@T
133 $(move-if-change) $@T $@
134 $(common-objpfx)cmath: $(c++-cmath-header)
135 $(INSTALL_DATA) $< $@T
136 $(move-if-change) $@T $@
137 ifneq (,$(c++-bits-std_abs-h))
138 # Also make a copy of <bits/std_abs.h> from GCC 7 to prevent it from
139 # including /usr/include/stdlib.h.
140 before-compile := $(common-objpfx)bits/std_abs.h $(before-compile)
141 $(common-objpfx)bits/std_abs.h: $(c++-bits-std_abs-h)
142 $(INSTALL_DATA) $< $@T
143 $(move-if-change) $@T $@
147 before-compile := $(common-objpfx)libc-abis.h $(before-compile)
148 $(common-objpfx)libc-abis.h: $(common-objpfx)libc-abis.stamp; @:
149 $(common-objpfx)libc-abis.stamp: $(..)scripts/gen-libc-abis \
150 $(firstword $(wildcard $(sysdirs:=/libc-abis)) \
154 $(base-machine)-$(config-vendor)-$(config-os) \
155 < $(word 2,$^) > $(@:.stamp=.h)T
156 $(move-if-change) $(@:.stamp=.h)T $(@:.stamp=.h)
158 common-generated += $(common-objpfx)libc-abis.h
159 endif # avoid-generated
161 ifeq (yes,$(build-shared))
162 $(common-objpfx)runtime-linker.h: $(common-objpfx)runtime-linker.stamp; @:
163 $(common-objpfx)runtime-linker.stamp: $(common-objpfx)config.make
164 $(make-target-directory)
165 echo '#define RUNTIME_LINKER "$(rtlddir)/$(rtld-installed-name)"' \
167 $(move-if-change) ${@:stamp=T} ${@:stamp=h}
171 # Make sure the subdirectory for object files gets created.
173 ifeq (,$(wildcard $(objpfx).))
174 before-compile += $(objpfx).
176 $(make-target-directory)
180 # Remove existing files from `before-compile'. Things are added there when
181 # they must exist for dependency generation to work right, but once they
182 # exist there is no further need for every single file to depend on them,
183 # and those gratuitous dependencies result in many gratuitous
185 before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
187 # Don't let any before-compile file be an intermediate and get removed.
192 # We don't want $(common-objpfx) files to depend on miscellaneous stuff
195 common-before-compile := $(filter-out $(objpfx)%,$(before-compile))
197 common-before-compile = $(before-compile)
201 # If a makefile needs to do something conditional on something that
202 # can only be figured out from headers, write a FOO.make.c input
203 # file that uses cpp contructs and contains @@@ LINE @@@ for each LINE
204 # to emit in the generated makefile, and use -include $(common-objpfx)FOO.make.
206 # We only generate these in the top-level makefile, to avoid any weirdness
207 # from subdir-specific makefile tweaks creeping in on an update.
208 $(common-objpfx)%.make: $(..)%.make.c $(..)Makerules $(common-before-compile)
210 (echo '# Generated from $*.make.c by Makerules.'; \
211 $(CC) $(CFLAGS) $(CPPFLAGS) -E -DASSEMBLER $< \
212 -MD -MP -MT '$$(common-objpfx)$*.make' -MF $@.dT \
213 | sed -n '/@@@/{s/@@@[ ]*\(.*\)@@@/\1/;s/[ ]*$$//p;}'; \
214 echo 'common-generated += $(@F)'; \
215 sed $(sed-remove-objpfx) $(sed-remove-dotdot) $@.dT; \
221 sed-remove-dotdot := -e 's@ *\.\.\/\([^ \]*\)@ $$(..)\1@g' \
222 -e 's@^\.\.\/\([^ \]*\)@$$(..)\1@g'
224 sed-remove-dotdot := -e 's@ *\([^ \/$$][^ \]*\)@ $$(..)\1@g' \
225 -e 's@^\([^ \/$$][^ \]*\)@$$(..)\1@g'
228 ifdef gen-py-const-headers
229 # We'll use a static pattern rule to match .pysym files with their
230 # corresponding generated .py files.
231 # The generated .py files go in the submodule's dir in the glibc build dir.
232 py-const-files := $(patsubst %.pysym,%.py,$(gen-py-const-headers))
233 py-const-dir := $(objpfx)
234 py-const := $(addprefix $(py-const-dir),$(py-const-files))
235 py-const-script := $(..)scripts/gen-py-const.awk
237 # This is a hack we use to generate .py files with constants for Python
238 # pretty printers. It works the same way as gen-as-const.
239 # See scripts/gen-py-const.awk for details on how the awk | gcc mechanism
242 # $@.tmp and $@.tmp2 are temporary files we use to store the partial contents
243 # of the target file. We do this instead of just writing on $@ because, if the
244 # build process terminates prematurely, re-running Make wouldn't run this rule
245 # since Make would see that the target file already exists (despite it being
248 # The sed line replaces "@name@SOME_NAME@value@SOME_VALUE@" strings from the
249 # output of 'gcc -S' with "SOME_NAME = SOME_VALUE" strings.
250 # The '-n' option, combined with the '/p' command, makes sed output only the
251 # modified lines instead of the whole input file. The output is redirected
252 # to a .py file; we'll import it in the pretty printers file to read
253 # the constants generated by gen-py-const.awk.
254 # The regex has two capturing groups, for SOME_NAME and SOME_VALUE
255 # respectively. Notice SOME_VALUE may be prepended by a special character,
256 # depending on the assembly syntax (e.g. immediates are prefixed by a '$'
257 # in AT&T x86, and by a '#' in ARM). We discard it using a complemented set
258 # before the second capturing group.
259 $(py-const): $(py-const-dir)%.py: %.pysym $(py-const-script) \
260 $(common-before-compile)
261 $(make-target-directory)
262 $(AWK) -f $(py-const-script) $< \
263 | $(CC) -S -o $@.tmp $(CFLAGS) $(CPPFLAGS) -x c -
264 echo '# GENERATED FILE\n' > $@.tmp2
265 echo '# Constant definitions for pretty printers.' >> $@.tmp2
266 echo '# See gen-py-const.awk for details.\n' >> $@.tmp2
267 sed -n -r 's/^.*@name@([^@]+)@value@[^[:xdigit:]Xx-]*([[:xdigit:]Xx-]+)@.*/\1 = \2/p' \
272 generated += $(py-const)
273 endif # gen-py-const-headers
275 ifdef gen-as-const-headers
276 # Generating headers for assembly constants.
277 # We need this defined early to get into before-compile before
278 # it's used in sysd-rules, below.
279 # Define GEN_AS_CONST_HEADERS to avoid circular dependency [BZ #22792].
280 # NB: <tcb-offsets.h> is generated from tcb-offsets.sym to define
281 # offsets and sizes of types in <tls.h> and maybe <pthread.h> which
282 # may include <tcb-offsets.h>. Target header files can check if
283 # GEN_AS_CONST_HEADERS is defined to avoid circular dependency which
284 # may lead to build hang on a many-core machine.
285 $(common-objpfx)%.h $(common-objpfx)%.h.d: $(..)scripts/gen-as-const.awk \
286 %.sym $(common-before-compile)
287 $(AWK) -f $< $(filter %.sym,$^) \
288 | $(CC) -S -o $(@:.h.d=.h)T3 $(CFLAGS) $(CPPFLAGS) \
289 -DGEN_AS_CONST_HEADERS -x c - \
290 -MD -MP -MF $(@:.h=.h.d)T -MT '$(@:.h=.h.d) $(@:.h.d=.h)'
291 sed -n 's/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*$$/#define \1 \2/p' \
292 $(@:.h.d=.h)T3 > $(@:.h.d=.h)T
294 sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
295 $(@:.h=.h.d)T > $(@:.h=.h.d)T2
297 mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d)
298 mv -f $(@:.h.d=.h)T $(@:.h.d=.h)
299 vpath %.sym $(sysdirs)
300 before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
302 tests-internal += $(gen-as-const-headers:%.sym=test-as-const-%)
303 generated += $(gen-as-const-headers:%.sym=test-as-const-%.c)
304 $(objpfx)test-as-const-%.c: $(..)scripts/gen-as-const.awk $(..)Makerules \
305 %.sym $(common-objpfx)%.h
306 ($(AWK) '{ sub(/^/, "asconst_", $$2); print; }' $(filter %.h,$^); \
307 $(AWK) -v test=1 -f $< $(filter %.sym,$^); \
308 echo '#include "$(..)test-skeleton.c"') > $@T
312 ifeq (yes,$(build-shared))
313 # Generate the header containing the names of all shared libraries.
314 # We use a stamp file to avoid unnecessary recompilations.
315 before-compile += $(common-objpfx)gnu/lib-names.h
316 ifeq ($(soversions.mk-done),t)
318 lib-names-h-abi = gnu/lib-names.h
319 lib-names-stmp-abi = gnu/lib-names.stmp
321 lib-names-h-abi = gnu/lib-names-$(default-abi).h
322 lib-names-stmp-abi = gnu/lib-names-$(default-abi).stmp
323 before-compile += $(common-objpfx)$(lib-names-h-abi)
324 common-generated += gnu/lib-names.h
325 install-others-nosubdir: $(inst_includedir)/$(lib-names-h-abi)
326 $(common-objpfx)gnu/lib-names.h:
327 $(make-target-directory)
329 echo '/* This file is automatically generated.';\
330 echo ' It defines macros to allow user program to find the shared'; \
331 echo ' library files which come as part of GNU libc. */'; \
332 echo '#ifndef __GNU_LIB_NAMES_H'; \
333 echo '#define __GNU_LIB_NAMES_H 1'; \
335 $(if $(abi-includes), \
336 $(foreach h,$(abi-includes), echo '#include <$(h)>';) \
338 $(foreach v,$(abi-variants),\
339 $(if $(abi-$(v)-condition),\
340 echo '#if $(abi-$(v)-condition)'; \
341 echo '# include <gnu/lib-names-$(v).h>'); \
342 $(if $(abi-$(v)-condition),echo '#endif';)) \
344 echo '#endif /* gnu/lib-names.h */'; \
347 $(common-objpfx)$(lib-names-h-abi): $(common-objpfx)$(lib-names-stmp-abi); @:
348 $(common-objpfx)$(lib-names-stmp-abi): $(..)scripts/lib-names.awk \
349 $(common-objpfx)soversions.i
350 $(make-target-directory)
352 $(if $(abi-variants), \
353 echo '/* This file is automatically generated. */';\
354 echo '#ifndef __GNU_LIB_NAMES_H'; \
355 echo '# error "Never use <$(lib-names-h-abi)> directly; include <gnu/lib-names.h> instead."'; \
357 echo '/* This file is automatically generated.';\
358 echo ' It defines macros to allow user program to find the shared'; \
359 echo ' library files which come as part of GNU libc. */'; \
360 echo '#ifndef __GNU_LIB_NAMES_H'; \
361 echo '#define __GNU_LIB_NAMES_H 1';) \
363 ($(foreach s,$(all-sonames), echo $(s);)) \
364 | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort; \
365 $(if $(abi-variants),, \
367 echo '#endif /* gnu/lib-names.h */';) \
369 $(move-if-change) ${@:stmp=T} ${@:stmp=h}
372 common-generated += $(lib-names-h-abi) $(lib-names-stmp-abi)
375 ###############################################################################
376 # NOTE! Everything adding to before-compile needs to come before this point! #
377 ###############################################################################
379 # Generate an ordered list of implicit rules which find the source files in
380 # each sysdep directory. The old method was to use vpath to search all the
381 # sysdep directories. However, that had the problem that a .S file in a
382 # later directory would be chosen over a .c file in an earlier directory,
383 # which does not preserve the desired sysdeps ordering behavior.
385 # System-dependent makefiles can put in `inhibit-sysdep-asm' regexps
386 # matching sysdep directories whose assembly source files should be
389 -include $(common-objpfx)sysd-rules
390 ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
391 # The value of $(+sysdep_dirs) the sysd-rules was computed for
392 # differs from the one we are using now. So force a rebuild of sysd-rules.
393 sysd-rules-force = FORCE
396 $(common-objpfx)sysd-rules: $(..)scripts/sysd-rules.awk \
397 $(common-objpfx)config.make $(..)Makerules \
398 $(sysdep-makefiles) $(sysdep-makeconfigs) \
401 LC_ALL=C $(AWK) -f $< > $@T \
402 -v all_object_suffixes='$(all-object-suffixes)' \
403 -v inhibit_sysdep_asm='$(inhibit-sysdep-asm)' \
404 -v sysd_rules_patterns='$(sysd-rules-patterns)' \
405 -v config_sysdirs='$(config-sysdirs)'
408 ifndef sysd-rules-done
409 # Don't do deps until this exists, because it provides rules to make the deps.
413 define o-iterator-doit
414 $(objpfx)%$o: %.S $(before-compile); $$(compile-command.S)
416 object-suffixes-left := $(all-object-suffixes)
417 include $(o-iterator)
419 define o-iterator-doit
420 $(objpfx)%$o: %.c $(before-compile); $$(compile-command.c)
422 object-suffixes-left := $(all-object-suffixes)
423 include $(o-iterator)
425 define o-iterator-doit
426 $(objpfx)%$o: %.cc $(before-compile); $$(compile-command.cc)
428 object-suffixes-left := $(all-object-suffixes)
429 include $(o-iterator)
431 # Omit the objpfx rules when building in the source tree, because
432 # objpfx is empty and so these rules just override the ones above.
434 # Define first rules to find the source files in $(objpfx).
435 # Generated source files will end up there.
436 define o-iterator-doit
437 $(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S)
439 object-suffixes-left := $(all-object-suffixes)
440 include $(o-iterator)
442 define o-iterator-doit
443 $(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
445 object-suffixes-left := $(all-object-suffixes)
446 include $(o-iterator)
449 # Generate .dT files as we compile.
450 compile-mkdep-flags = -MD -MP -MF $@.dt -MT $@
451 compile-command.S = $(compile.S) $(OUTPUT_OPTION) $(compile-mkdep-flags)
452 compile-command.c = $(compile.c) $(OUTPUT_OPTION) $(compile-mkdep-flags)
453 compile-command.cc = $(compile.cc) $(OUTPUT_OPTION) $(compile-mkdep-flags)
455 # Like compile-mkdep-flags, but for use with $(BUILD_CC). We don't want to
456 # track system includes here, they may spuriously trigger an install rule,
457 # and would cause the check-local-headers test to fail.
458 native-compile-mkdep-flags = -MMD -MP -MF $@.dt -MT $@
460 # GCC can grok options after the file name, and it looks nicer that way.
461 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
462 compile.cc = $(CXX) $< -c $(CXXFLAGS) $(CPPFLAGS)
463 compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \
464 $(ASFLAGS) $(ASFLAGS-$(suffix $@))
465 COMPILE.c = $(CC) -c $(CFLAGS) $(CPPFLAGS)
466 COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \
467 $(ASFLAGS) $(ASFLAGS-$(suffix $@))
469 # We need this for the output to go in the right place. It will default to
470 # empty if make was configured to work with a cc that can't grok -c and -o
471 # together. You can't compile the C library with such a compiler.
472 OUTPUT_OPTION = -o $@
474 # This is the end of the pipeline for compiling generated C code.
475 compile-stdin.c = $(COMPILE.c) -o $@ -x c - $(compile-mkdep-flags)
477 # We need the $(CFLAGS) to be in there to have the right predefines during
478 # the dependency run for C sources. But having it for assembly sources can
479 # get the wrong predefines.
480 S-CPPFLAGS = -DASSEMBLER $(asm-CPPFLAGS)
483 $(make-target-directory)
484 $(+mkdep) $< $(if $(filter %.c,$<),$(CFLAGS)) \
485 $(CPPFLAGS) $($(patsubst .%,%,$(suffix $(<F)))-CPPFLAGS) | sed -e\
486 's,$(subst .,\.,$(@F:.d=.o)),$(foreach o,$(all-object-suffixes),$(@:.d=$o)) $@,' \
487 $(sed-remove-objpfx) $(sed-remove-dotdot) > $(@:.d=.T)
488 mv -f $(@:.d=.T) $@ $(generate-md5)
492 # Continuation lines here are dangerous because they introduce spaces!
493 define sed-remove-objpfx
494 -e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
495 -e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g'
499 # Modify the list of routines we build for different targets
501 ifeq (yes,$(build-shared))
502 ifndef libc.so-version
503 # Undefine this because it can't work when we libc.so is unversioned.
504 static-only-routines =
508 elide-routines.oS += $(filter-out $(static-only-routines),\
509 $(routines) $(aux) $(sysdep_routines))
510 elide-routines.os += $(static-only-routines)
512 # If we have versioned code we don't need the old versions in any of the
514 elide-routines.o += $(shared-only-routines)
515 elide-routines.op += $(shared-only-routines)
517 # Shared library building.
519 ifeq (yes,$(build-shared))
521 # Reference map file only when shared libraries are built and a map file name
523 ifeq ($(build-shared),yes)
524 map-file = $(firstword $($(@F:.so=-map)) \
525 $(addprefix $(common-objpfx), \
526 $(filter $(@F:.so=.map),$(version-maps))))
527 load-map-file = $(map-file:%=-Wl,--version-script=%)
530 # Compiler arguments to use to link a shared object with libc and
531 # ld.so. This is intended to be as similar as possible to a default
532 # link with an installed libc.
533 link-libc-args = -Wl,--start-group \
535 $(common-objpfx)libc_nonshared.a \
536 $(as-needed) $(elf-objpfx)ld.so $(no-as-needed) \
539 # The corresponding shared libc to use. This may be modified for a
541 libc-for-link = $(common-objpfx)libc.so
543 # The corresponding dependencies. As these are used in dependencies,
544 # not just commands, they cannot use target-specific variables so need
545 # to name both possible libc.so objects.
546 link-libc-deps = $(common-objpfx)libc.so $(common-objpfx)linkobj/libc.so \
547 $(common-objpfx)libc_nonshared.a $(elf-objpfx)ld.so
549 # Pattern rule to build a shared object from an archive of PIC objects.
550 # This must come after the installation rules so Make doesn't try to
551 # build shared libraries in place from the installed *_pic.a files.
552 # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
553 # on other shared objects. The linking with libc and ld.so is intended
554 # to be as similar as possible to a default link with an installed libc.
555 lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(link-libc-deps)
556 $(build-shlib) $(link-libc-args)
557 $(call after-link,$@)
559 define build-shlib-helper
560 $(LINK.o) -shared -static-libgcc -Wl,-O1 $(sysdep-LDFLAGS) \
561 $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) $(rtld-LDFLAGS) \
562 $(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \
563 $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
564 -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
565 $(LDFLAGS.so) $(LDFLAGS-lib.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
566 -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
569 ifeq (yes,$(use-default-link))
570 # If the linker is good enough, we can let it use its default linker script.
574 # binutils only position loadable notes into the first page for binaries,
575 # not for shared objects
576 $(common-objpfx)shlib.lds: $(common-objpfx)config.make $(..)Makerules
577 $(LINK.o) -shared -Wl,-O1 \
578 -nostdlib -nostartfiles \
579 $(sysdep-LDFLAGS) $(rtld-LDFLAGS) $(LDFLAGS.so) \
580 -Wl,--verbose 2>&1 | \
582 -e '/^=========/,/^=========/!d;/^=========/d' \
583 $(if $(filter yes,$(have-hash-style)), \
584 -e 's/^.*\.gnu\.hash[ ]*:.*$$/ .note.ABI-tag : { *(.note.ABI-tag) } &/' \
585 -e '/^[ ]*\.hash[ ]*:.*$$/{h;d;}' \
586 -e '/DATA_SEGMENT_ALIGN/{H;g}' \
588 -e 's/^.*\.hash[ ]*:.*$$/ .note.ABI-tag : { *(.note.ABI-tag) } &/' \
590 -e 's/^.*\*(\.dynbss).*$$/& \
591 PROVIDE(__start___libc_freeres_ptrs = .); \
592 *(__libc_freeres_ptrs) \
593 PROVIDE(__stop___libc_freeres_ptrs = .);/'\
594 -e 's@^.*\*(\.jcr).*$$@& \
595 PROVIDE(__start___libc_subfreeres = .);\
596 __libc_subfreeres : { *(__libc_subfreeres) }\
597 PROVIDE(__stop___libc_subfreeres = .);\
598 PROVIDE(__start___libc_atexit = .);\
599 __libc_atexit : { *(__libc_atexit) }\
600 PROVIDE(__stop___libc_atexit = .);\
601 PROVIDE(__start___libc_IO_vtables = .);\
602 __libc_IO_vtables : { *(__libc_IO_vtables) }\
603 PROVIDE(__stop___libc_IO_vtables = .);\
604 /DISCARD/ : { *(.gnu.glibc-stub.*) }@'
607 common-generated += shlib.lds
609 shlib-lds = $(common-objpfx)shlib.lds
610 shlib-lds-flags = -T $(shlib-lds)
614 $(build-shlib-helper) -o $@ $(shlib-lds-flags) \
615 $(csu-objpfx)abi-note.o $(build-shlib-objlist)
618 define build-module-helper
619 $(LINK.o) -shared -static-libgcc $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
620 $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
621 -B$(csu-objpfx) $(load-map-file) \
622 $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
623 -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
626 # This macro is similar to build-shlib but it does not define a soname
627 # and it does not depend on the destination name to start with `lib'.
628 # binutils only position loadable notes into the first page for binaries,
629 # not for shared objects
631 $(build-module-helper) -o $@ $(shlib-lds-flags) \
632 $(csu-objpfx)abi-note.o $(build-module-objlist) $(link-libc-args)
633 $(call after-link,$@)
635 define build-module-asneeded
636 $(build-module-helper) -o $@ $(shlib-lds-flags) \
637 $(csu-objpfx)abi-note.o \
638 -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed \
640 $(call after-link,$@)
643 # sofini.os must be placed last since it terminates .eh_frame section.
644 build-module-helper-objlist = \
645 $(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\
646 $(filter-out %.lds $(map-file) $(+preinit) $(+postinit) \
647 $(elf-objpfx)sofini.os \
648 $(link-libc-deps),$^))
650 build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so)
651 build-shlib-objlist = $(build-module-helper-objlist) \
652 $(LDLIBS-$(@F:lib%.so=%).so) \
653 $(filter $(elf-objpfx)sofini.os,$^)
655 # Don't try to use -lc when making libc.so itself.
656 # Also omits crti.o and crtn.o, which we do not want
657 # since we define our own `.init' section specially.
658 LDFLAGS-c.so = -nostdlib -nostartfiles
659 # But we still want to link libc.so against $(libc.so-gnulib).
660 LDLIBS-c.so += $(libc.so-gnulib)
661 # Give libc.so an entry point and make it directly runnable itself.
662 LDFLAGS-c.so += -e __libc_main
663 # Pre-link the objects of libc_pic.a so that we can locally resolve
664 # COMMON symbols before we link against ld.so. This is because ld.so
665 # contains some of libc_pic.a already, which will prevent the COMMONs
666 # from being allocated in libc.so, which introduces evil dependencies
667 # between libc.so and ld.so, which can make it impossible to upgrade.
668 $(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
669 $(LINK.o) -nostdlib -nostartfiles -r -o $@ \
670 $(LDFLAGS-c_pic.os) -Wl,-d $(whole-archive) $^ -o $@
672 ifeq (,$(strip $(shlib-lds-flags)))
673 # Generate a list of -R options to excise .gnu.glibc-stub.* sections.
674 $(common-objpfx)libc_pic.opts: $(common-objpfx)libc_pic.os
676 $(AWK) '$$2 ~ /\.gnu\.glibc-stub\./ { print "-R", $$2 }' \
679 # Apply those -R options.
680 $(common-objpfx)libc_pic.os.clean: $(common-objpfx)libc_pic.opts \
681 $(common-objpfx)libc_pic.os
683 generated += libc_pic.opts libc_pic.os.clean
685 libc_pic_clean := .clean
688 # Build a possibly-modified version of libc_pic.a for use in building
690 ifeq (,$(filter sunrpc,$(subdirs)))
691 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a
692 $(make-target-directory)
695 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a \
696 $(common-objpfx)sunrpc/librpc_compat_pic.a
697 $(make-target-directory)
698 (cd $(common-objpfx)linkobj; \
699 $(AR) x ../libc_pic.a; \
700 rm $$($(AR) t ../sunrpc/librpc_compat_pic.a | sed 's/^compat-//'); \
701 $(AR) x ../sunrpc/librpc_compat_pic.a; \
702 $(AR) cr libc_pic.a *.os; \
704 endif # $(subdirs) contains sunrpc
706 # Clear link-libc-deps for the libc.so libraries so build-shlibs does not
707 # filter ld.so out of the list of linked objects.
708 $(common-objpfx)libc.so: link-libc-deps = # empty
709 $(common-objpfx)linkobj/libc.so: link-libc-deps = # empty
711 # Use our own special initializer and finalizer files for the libc.so
713 $(common-objpfx)libc.so: $(elf-objpfx)soinit.os \
714 $(common-objpfx)libc_pic.os$(libc_pic_clean) \
715 $(elf-objpfx)sofini.os \
716 $(elf-objpfx)interp.os \
720 $(call after-link,$@)
722 $(common-objpfx)linkobj/libc.so: $(elf-objpfx)soinit.os \
723 $(common-objpfx)linkobj/libc_pic.a \
724 $(elf-objpfx)sofini.os \
725 $(elf-objpfx)interp.os \
729 $(call after-link,$@)
731 ifeq ($(build-shared),yes)
732 $(common-objpfx)libc.so: $(common-objpfx)libc.map
734 common-generated += libc.so libc_pic.os
735 ifdef libc.so-version
736 $(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
738 common-generated += libc.so$(libc.so-version)
742 # Figure out the source filenames in this directory.
744 override sources := $(addsuffix .c,\
745 $(filter-out $(elided-routines),\
748 sysdep_routines := $(sysdep_routines)
750 headers := $(headers) $(sysdep_headers)
752 # This is the list of all object files, gotten by
753 # replacing every ".c" in `sources' with a ".o".
754 override objects := $(addprefix $(objpfx),$(sources:.c=.o))
757 # The makefile may define $(extra-libs) with `libfoo libbar'
758 # to build libfoo.a et al from the modules listed in $(libfoo-routines).
760 # extra-lib.mk is included once for each extra lib to define rules
761 # to build it, and to add its objects to the various variables.
762 # During its evaluation, $(lib) is set to the name of the library.
763 extra-libs-left := $(extra-libs)
764 include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
768 # The makefile may define $(modules-names) to build additional modules.
769 # These are built with $(build-module), except any in $(modules-names-nobuild).
770 # MODULE_NAME=extramodules, except any in $(modules-names-tests).
772 cpp-srcs-left := $(filter-out $(modules-names-tests),$(modules-names))
773 ifneq (,$(cpp-srcs-left))
775 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
778 ifdef modules-names-tests
779 cpp-srcs-left := $(filter $(modules-names-tests),$(modules-names))
780 ifneq (,$(cpp-srcs-left))
782 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
786 extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names))
787 $(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \
788 $(objpfx)%.os $(shlib-lds) $(link-libs-deps)
792 +depfiles := $(sources:.c=.d) \
793 $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \
794 $(patsubst %.oS,%.d,$(filter %.oS,$(extra-objs))) \
795 $(patsubst %.o,%.d,$(filter %.o,$(extra-test-objs:.os=.o))) \
796 $(addsuffix .d,$(tests) $(tests-internal) $(xtests) $(test-srcs))
797 ifeq ($(build-programs),yes)
798 +depfiles += $(addsuffix .d,$(others) $(sysdep-others))
800 +depfiles := $(addprefix $(objpfx),\
801 $(filter-out $(addsuffix .d,$(omit-deps)),\
803 all-dt-files := $(foreach o,$(object-suffixes-for-libc),$(+depfiles:.d=$o.dt))
804 +depfiles := $(patsubst %.dt,%.d,$(wildcard $(all-dt-files))) \
805 $(wildcard $(all-dt-files:.dt=.d))
807 # This is a funny rule in that it removes its input file.
809 @sed $(sed-remove-objpfx) $< > $(@:.d=.T) && \
810 mv -f $(@:.d=.T) $@ && \
813 # Avoid the .h.d files for any .sym files whose .h files don't exist yet.
814 # They will be generated when they're needed, and trying too early won't work.
815 +gen-as-const := $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
816 +depfiles += $(addsuffix .d,$(filter $(wildcard $(+gen-as-const)),\
821 -include $(+depfiles)
825 # Maximize efficiency by minimizing the number of rules.
826 .SUFFIXES: # Clear the suffix list. We don't use suffix rules.
827 # Don't define any builtin rules.
828 MAKEFLAGS := $(MAKEFLAGS)r
830 # Generic rule for making directories.
832 # mkdir isn't smart enough to strip a trailing /.
833 # We always require a mkdir which supports the -p option to avoid error
834 # messages in case of races.
837 # Make sure that object files are not removed
838 # when they are intermediates between sources and library members.
839 .PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes))
841 # Make sure that the parent library archive is never removed.
842 .PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
844 # Use the verbose option of ar and tar when not running silently.
845 ifeq "$(findstring s,$(MAKEFLAGS))" "" # if not -s
851 ARFLAGS := r$(verbose)
852 CREATE_ARFLAGS := cru$(verbose)
854 # This makes all the object files in the parent library archive.
856 .PHONY: lib lib-noranlib
857 lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
858 lib-noranlib: libobjs
860 # For object-suffix $o, the list of objects with that suffix.
861 # Makefiles can define `elide-routines.so = foo' to leave foo.so out.
862 o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
863 $(elide-routines$o)),\
865 $(addprefix $(objpfx),$(o-objects$o))
867 others: $(addprefix $(objpfx),$(install-lib))
871 # Create the stamp$o files to keep the parent makefile happy.
872 subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
873 $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o):
874 $(make-target-directory)
878 # Define explicit rules to update each $(objpfx)stamp.SUFFIX
879 # timestamp file; these rules (one explicit rule is generated for each
880 # object suffix) write a list of objects to update in the stamp file.
881 # The parent will then actually add them all to the archive in the
882 # archive rule, below.
883 define o-iterator-doit
884 $(objpfx)stamp$o: $(o-objects); $$(do-stamp)
887 $(make-target-directory)
888 echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T
891 object-suffixes-left := $(object-suffixes-for-libc)
892 include $(o-iterator)
896 # Now define explicit rules to build the library archives; these depend
897 # on the stamp files built above.
898 define o-iterator-doit
899 $(common-objpfx)$(patsubst %,$(libtype$o),c): \
900 $(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib)
903 cd $(common-objdir) && \
904 $(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)`
906 subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%)
907 subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
909 $(subdirs-stamps): subdir_lib;
911 object-suffixes-left = $(object-suffixes-for-libc)
912 include $(o-iterator)
915 # This makes all the object files.
916 .PHONY: objects objs libobjs extra-objs
917 objects objs: libobjs extra-objs
918 libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
919 extra-objs: $(addprefix $(objpfx),$(extra-objs))
921 # Canned sequence for building an extra library archive.
922 define build-extra-lib
923 $(patsubst %/,cd % &&,$(objpfx)) \
924 $(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \
925 $(patsubst $(objpfx)%,%,$^)
930 .PHONY: force-install
933 # $(install-lib) are installed from the object directory into $(libdir);
934 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
935 # unless they also appear in $(non-lib.a). $(install-data) are installed as
936 # they are into $(datadir). $(headers) are installed as they are in
937 # $(includedir). $(install-bin), $(install-bin-script) and $(install-sbin)
938 # are installed from the object directory into $(bindir), $(bindir) and
939 # $(sbindir), respectively. $(install-others) and $(install-others-programs)
940 # are absolute path names of files to install; rules to install them are
943 # The simple library name to install libc.a under.
944 # This could be defined by a sysdep Makefile.
950 $(make-target-directory)
951 $(INSTALL_DATA) $< $@
954 # Make the target directory if it doesn't exist, using the `mkinstalldirs'
955 # script that does `mkdir -p' even if `mkdir' doesn't support that flag.
956 define make-target-directory
957 $(addprefix $(..)./scripts/mkinstalldirs ,\
958 $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
961 # Any directory (parent or subdir) should install libc.a; this way
962 # "make install" in a subdir is guaranteed to install everything it changes.
963 installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
964 $(inst_libdir)/$(patsubst %,$(libtype$o),\
965 $(libprefix)$(libc-name)))
967 .PHONY: check-install-supported
968 check-install-supported:
970 # Check to see if the prefix or exec_prefix GNU standard variable
971 # has been overridden on the command line and, if so, fail with
972 # an error message since doing so is not supported (set DESTDIR
974 ifeq ($(origin prefix),command line)
975 check-install-supported:
976 $(error Overriding prefix is not supported. Set DESTDIR instead.)
979 ifeq ($(origin exec_prefix),command line)
980 check-install-supported:
981 $(error Overriding exec_prefix is not supported. Set DESTDIR instead.)
984 install: check-install-supported
986 install: $(installed-libcs)
987 $(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
988 $(make-target-directory)
989 $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
991 define do-install-program
992 $(make-target-directory)
993 $(INSTALL_PROGRAM) $< $@.new
997 define do-install-script
998 $(make-target-directory)
999 $(INSTALL_SCRIPT) $< $@.new
1003 install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
1004 install-lib := $(filter-out %.so %_pic.a,$(install-lib))
1006 ifeq (yes,$(build-shared))
1007 # Find which .so's have versions.
1008 versioned := $(strip $(foreach so,$(install-lib.so),\
1009 $(patsubst %,$(so),$($(so)-version))))
1011 install-lib.so-versioned := $(filter $(versioned), $(install-lib.so))
1012 install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so))
1014 # For versioned libraries, we install three files:
1015 # $(inst_libdir)/libfoo.so -- for linking, symlink or ld script
1016 # $(inst_slibdir)/libfoo.so.NN -- for loading by SONAME, symlink
1017 # $(inst_slibdir)/libfoo-X.Y.Z.so -- the real shared object file
1018 lib-version := $(firstword $($(subdir)-version) $(version))
1019 install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \
1020 $(foreach L,$(install-lib.so-versioned),\
1022 $(inst_slibdir)/$(L:.so=)-$(lib-version).so \
1023 $(inst_slibdir)/$L$($L-version))
1025 # Install all the unversioned shared libraries.
1026 $(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \
1027 $(objpfx)%.so $(+force)
1028 $(do-install-program)
1030 ifneq ($(findstring -s,$(LN_S)),)
1033 $(SHELL) $(..)scripts/rellns-sh $< $@.new
1036 define make-link-multidir
1037 $(patsubst %/,cd %,$(objpfx)); \
1038 $(addprefix $(abspath $(..)scripts/mkinstalldirs) ,$(dir $(multidir))); \
1039 $(LN_S) . $(multidir) 2> /dev/null; \
1043 # If we have no symbolic links don't bother with rellns-sh.
1049 define make-link-multidir
1050 $(make-target-directory)
1051 ln -f $(objpfx)/$(@F) $@
1055 ifeq (yes,$(build-shared))
1056 ifeq (no,$(cross-compiling))
1057 symbolic-link-prog := $(elf-objpfx)sln
1058 symbolic-link-list := $(elf-objpfx)symlink.list
1059 define make-shlib-link
1060 echo `$(..)scripts/rellns-sh -p $< $@` $@ >> $(symbolic-link-list)
1062 else # cross-compiling
1063 # We need a definition that can be used by elf/Makefile's install rules.
1064 symbolic-link-prog = $(LN_S)
1067 ifndef make-shlib-link
1068 define make-shlib-link
1070 $(LN_S) `$(..)scripts/rellns-sh -p $< $@` $@
1074 ifdef libc.so-version
1075 # For a library specified to be version N, install three files:
1076 # libc.so -> libc.so.N (e.g. libc.so.6)
1077 # libc.so.6 -> libc-VERSION.so (e.g. libc-1.10.so)
1079 $(inst_slibdir)/libc.so$(libc.so-version): $(inst_slibdir)/libc-$(version).so \
1082 $(inst_slibdir)/libc-$(version).so: $(common-objpfx)libc.so $(+force)
1083 $(do-install-program)
1084 install: $(inst_slibdir)/libc.so$(libc.so-version)
1086 # This fragment of linker script gives the OUTPUT_FORMAT statement
1087 # for the configuration we are building. We put this statement into
1088 # the linker scripts we install for -lc et al so that they will not be
1089 # used by a link for a different format on a multi-architecture system.
1090 $(common-objpfx)format.lds: $(..)scripts/output-format.sed \
1091 $(common-objpfx)config.make \
1092 $(common-objpfx)config.h $(..)Makerules
1093 ifneq (unknown,$(output-format))
1094 echo > $@.new 'OUTPUT_FORMAT($(output-format))'
1096 $(LINK.o) -shared $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
1097 $(LDFLAGS.so) $(LDFLAGS-lib.so) \
1098 -x c /dev/null -o $@.so -Wl,--verbose -v 2>&1 \
1099 | sed -n -f $< > $@.new
1104 common-generated += format.lds
1107 # What we install as libc.so for programs to link against is in fact a
1108 # link script. It contains references for the various libraries we need.
1109 # The libc.so object is not complete since some functions are only defined
1110 # in libc_nonshared.a.
1111 # We need to use absolute paths since otherwise local copies (if they exist)
1112 # of the files are taken by the linker.
1113 install: $(inst_libdir)/libc.so
1114 $(inst_libdir)/libc.so: $(common-objpfx)format.lds \
1115 $(common-objpfx)libc.so$(libc.so-version) \
1116 $(inst_libdir)/$(patsubst %,$(libtype.oS),\
1117 $(libprefix)$(libc-name)) \
1119 (echo '/* GNU ld script';\
1120 echo ' Use the shared library, but some functions are only in';\
1121 echo ' the static library, so try that secondarily. */';\
1123 echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \
1124 '$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\
1125 ' AS_NEEDED (' $(rtlddir)/$(rtld-installed-name) ') )' \
1132 install: $(inst_slibdir)/libc.so
1133 $(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force)
1134 $(do-install-program)
1137 ifneq (,$(versioned))
1138 # Produce three sets of rules as above for all the smaller versioned libraries.
1140 define o-iterator-doit
1141 $(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link)
1143 object-suffixes-left := $(filter-out $(install-lib-ldscripts),$(versioned))
1144 ifneq (,$(object-suffixes-left))
1145 include $(o-iterator)
1148 # Make symlinks in the build directory, because the versioned names might
1149 # be referenced by a DT_NEEDED in another library.
1150 define o-iterator-doit
1151 $(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
1153 object-suffixes-left := $(versioned)
1154 include $(o-iterator)
1156 generated += $(foreach o,$(versioned),$o$($o-version))
1158 ifeq (,$($(subdir)-version))
1159 define o-iterator-doit
1160 $(inst_slibdir)/$o$($o-version): $(inst_slibdir)/$(o:.so=)-$(version).so \
1164 object-suffixes-left := $(versioned)
1165 include $(o-iterator)
1167 define o-iterator-doit
1168 $(inst_slibdir)/$(o:.so=)-$(version).so: $(objpfx)$o $(+force);
1169 $$(do-install-program)
1171 object-suffixes-left := $(versioned)
1172 include $(o-iterator)
1174 define o-iterator-doit
1175 $(inst_slibdir)/$o$($o-version): \
1176 $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so $(+force);
1179 object-suffixes-left := $(versioned)
1180 include $(o-iterator)
1182 define o-iterator-doit
1183 $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so: $(objpfx)$o $(+force);
1184 $$(do-install-program)
1186 object-suffixes-left := $(versioned)
1187 include $(o-iterator)
1191 define do-install-so
1192 $(do-install-program)
1193 $(patsubst %,$(LN_S) -f $(@F) \
1194 $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
1195 $(filter-out %.so,$@))
1198 so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
1199 $(foreach v,$(so-versions),\
1200 $(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \
1203 $(foreach v,$(so-versions),\
1204 $(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force)
1209 $(addprefix $(inst_bindir)/,$(install-bin)): \
1210 $(inst_bindir)/%: $(objpfx)% $(+force)
1211 $(do-install-program)
1213 ifdef install-bin-script
1214 $(addprefix $(inst_bindir)/,$(install-bin-script)): \
1215 $(inst_bindir)/%: $(objpfx)% $(+force)
1216 $(do-install-script)
1218 ifdef install-rootsbin
1219 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \
1220 $(inst_rootsbindir)/%: $(objpfx)% $(+force)
1221 $(do-install-program)
1224 $(addprefix $(inst_sbindir)/,$(install-sbin)): \
1225 $(inst_sbindir)/%: $(objpfx)% $(+force)
1226 $(do-install-program)
1229 install-lib.a := $(filter lib%.a,$(install-lib))
1230 install-lib.a := $(filter-out $(install-lib-ldscripts),$(install-lib.a))
1231 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
1232 ifdef install-lib-non.a
1233 $(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
1234 $(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force)
1238 $(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \
1239 $(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force)
1244 $(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force)
1247 headers := $(strip $(headers))
1249 # This implicit rule installs headers from the source directory.
1250 # It may be ignored in preference to rules from sysd-rules to find
1251 # headers in the sysdeps tree.
1252 $(inst_includedir)/%.h: $(objpfx)%.h $(+force)
1254 $(inst_includedir)/%.h: $(common-objpfx)%.h $(+force)
1256 $(inst_includedir)/%.h: %.h $(+force)
1258 $(inst_includedir)/%.h: $(..)include/%.h $(+force)
1260 headers-nonh := $(filter-out %.h,$(headers))
1262 $(addprefix $(inst_includedir)/,$(headers-nonh)): $(inst_includedir)/%: \
1265 endif # headers-nonh
1268 .PHONY: install-bin-nosubdir install-bin-script-nosubdir \
1269 install-rootsbin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
1270 install-data-nosubdir install-headers-nosubdir
1271 install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin))
1272 install-bin-script-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin-script))
1273 install-rootsbin-nosubdir: \
1274 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin))
1275 install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin))
1276 install-lib-nosubdir: $(addprefix $(inst_libdir)/,\
1277 $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
1278 $(addprefix $(libprefix),$(install-lib-non.a)))
1279 install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data))
1280 install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers))
1281 install-others-nosubdir: $(install-others)
1282 install-others-programs-nosubdir: $(install-others-programs)
1284 # We need all the `-nosubdir' targets so that `install' in the parent
1285 # doesn't depend on several things which each iterate over the subdirs.
1286 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
1287 # subroutine. Then in the parent `install-FOO' also causes subdir makes.
1288 install-%:: install-%-nosubdir ;
1290 .PHONY: install install-no-libc.a-nosubdir
1291 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir \
1292 install-lib-nosubdir install-others-nosubdir
1293 ifeq ($(build-programs),yes)
1294 install-no-libc.a-nosubdir: install-bin-nosubdir install-bin-script-nosubdir \
1295 install-rootsbin-nosubdir install-sbin-nosubdir \
1296 install-others-programs-nosubdir
1298 install: install-no-libc.a-nosubdir
1300 # Command to compile $< using the native libraries.
1301 define native-compile
1302 $(make-target-directory)
1303 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
1304 $< $(OUTPUT_OPTION) $(BUILD_LDFLAGS)
1307 # We always want to use configuration definitions.
1308 ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) -D_GNU_SOURCE \
1309 -DIS_IN_build -include $(common-objpfx)config.h
1311 # Support the GNU standard name for this target.
1314 # Special target to run tests which cannot be run unconditionally.
1315 # Maintainers should use this target.
1319 # The only difference between MODULE_NAME=testsuite and MODULE_NAME=nonlib is
1320 # that almost all internal declarations from config.h, libc-symbols.h, and
1321 # include/*.h are not available to 'testsuite' code, but are to 'nonlib' code.
1322 all-testsuite := $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) \
1324 ifneq (,$(all-testsuite))
1325 cpp-srcs-left = $(all-testsuite)
1327 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
1330 all-nonlib := $(strip $(tests-internal) $(test-internal-extras) \
1331 $(others) $(others-extras))
1332 ifneq (,$(all-nonlib))
1333 cpp-srcs-left = $(all-nonlib)
1335 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
1339 ifeq ($(build-shared),yes)
1340 # Generate normalized lists of symbols, versions, and data sizes.
1341 # This is handy for checking against existing library binaries.
1343 %.symlist: $(..)scripts/abilist.awk %.dynsym
1344 LC_ALL=C $(AWK) -f $^ > $@T
1348 LC_ALL=C $(OBJDUMP) --dynamic-syms $< > $@T
1351 # A sysdeps/.../Makefile can set abilist-pattern to something like
1352 # %-foo.abilist to look for libc-foo.abilist instead of libc.abilist.
1353 # This makes sense if multiple ABIs can be most cleanly supported by a
1354 # configuration without using separate sysdeps directories for each.
1355 ifdef abilist-pattern
1356 vpath $(abilist-pattern) $(+sysdep_dirs)
1359 vpath %.abilist $(+sysdep_dirs)
1361 # The .PRECIOUS rule prevents the files built by an implicit rule whose
1362 # target pattern is %.symlist from being considered "intermediate files"
1363 # and automatically removed. We only want these files to be removed by
1364 # 'make clean', which is handled by the 'generated' variable.
1365 .PRECIOUS: %.symlist
1366 generated += $(extra-libs:=.symlist)
1368 ifdef abilist-pattern
1369 $(objpfx)check-abi-%.out: $(common-objpfx)config.make $(abilist-pattern) \
1371 $(check-abi-pattern); \
1373 $(objpfx)check-abi-%.out: $(common-objpfx)config.make $(abilist-pattern) \
1374 $(common-objpfx)%.symlist
1375 $(check-abi-pattern); \
1378 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1382 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1383 $(common-objpfx)%.symlist
1386 define check-abi-pattern
1387 diff -p -U 0 $(filter $(abilist-pattern),$^) $(filter %.symlist,$^) \
1391 diff -p -U 0 $(filter %.abilist,$^) $(filter %.symlist,$^) > $@
1394 ifdef abilist-pattern
1395 update-abi-%: $(objpfx)%.symlist $(abilist-pattern)
1396 $(update-abi-pattern)
1397 update-abi-%: $(common-objpfx)%.symlist $(abilist-pattern)
1398 $(update-abi-pattern)
1400 update-abi-%: $(objpfx)%.symlist %.abilist
1402 update-abi-%: $(common-objpfx)%.symlist %.abilist
1404 define update-abi-pattern
1405 @if cmp -s $^ 2> /dev/null; \
1407 echo '+++ $(filter $(abilist-pattern),$^) is unchanged'; \
1409 echo '*** Now check $(filter $(abilist-pattern),$^) changes for correctness ***'; \
1413 @if cmp -s $^ 2> /dev/null; \
1415 echo '+++ $(filter %.abilist,$^) is unchanged'; \
1417 echo '*** Now check $(filter %.abilist,$^) changes for correctness ***'; \
1421 # Patch all .abilist files for one DSO. The find command locates
1422 # abilist files for all architectures. The regular expression in the
1423 # find invocation is needed to separate libc.abilist and
1424 # libcrypt.abilist, for example. It assumes that abilist-pattern, if
1425 # set, is of the form "%-SUFFIX", and not "%SUFFIX", that is, there is
1426 # a non-alphanumeric seperator between the pattern and the suffix
1427 # added. The abilist files in /generic/ are filtered out because
1428 # these are expected to remain empty.
1429 define update-all-abi
1430 $(SHELL) $(..)scripts/update-abilist.sh $^ \
1431 $$(find $(..)sysdeps \
1432 -regextype posix-egrep -regex '.*/$*([^a-z0-9].*)?\.abilist$$' \
1433 \! -regex '.*/generic/.*')
1435 ifdef abilist-pattern
1436 update-all-abi-%: $(abilist-pattern) $(objpfx)%.symlist
1438 update-all-abi-%: $(abilist-pattern) $(common-objpfx)%.symlist
1441 update-all-abi-%: %.abilist $(objpfx)%.symlist
1443 update-all-abi-%: %.abilist $(common-objpfx)%.symlist
1446 .PHONY: update-abi update-all-abi check-abi
1447 update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned))
1448 update-all-abi: $(patsubst %.so,update-all-abi-%,$(install-lib.so-versioned))
1449 check-abi-list = $(patsubst %.so,$(objpfx)check-abi-%.out, \
1450 $(install-lib.so-versioned))
1451 check-abi: $(check-abi-list)
1453 subdir_check-abi: check-abi
1454 subdir_update-abi: update-abi
1455 subdir_update-all-abi: update-all-abi
1457 check-abi: subdir_check-abi
1458 if grep -q '^FAIL:' $(objpfx)*/check-abi*.test-result; then \
1459 cat $(objpfx)*/check-abi*.out && exit 1; fi
1460 update-abi: subdir_update-abi
1461 update-all-abi: subdir_update-all-abi
1464 ifeq ($(subdir),elf)
1465 check-abi: $(objpfx)check-abi-libc.out
1466 tests-special += $(objpfx)check-abi-libc.out
1467 update-abi: update-abi-libc
1468 update-all-abi: update-all-abi-libc
1469 common-generated += libc.symlist
1472 ifeq ($(build-shared),yes)
1474 tests-special += $(check-abi-list)
1480 # These will have been set by sysdeps/posix/Makefile.
1486 stdio_lim = $(common-objpfx)bits/stdio_lim.h
1488 $(stdio_lim:lim.h=%.h) $(stdio_lim:lim.h=%.d): $(stdio_lim:lim.h=%.st); @:
1489 $(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \
1490 $(common-objpfx)config.make
1491 $(make-target-directory)
1492 { echo '#include "$(..)posix/bits/posix1_lim.h"'; \
1494 $(CC) -E -dM -MD -MP -MF $(@:st=dT) -MT '$(@:st=h) $(@:st=d)' \
1495 $(CPPUNDEFS) $(+includes) -xc - -o $(@:st=hT)
1496 sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
1497 $(@:st=dT) > $(@:st=dt)
1498 mv -f $(@:st=dt) $(@:st=d)
1499 fopen_max=`sed -n 's/^#define OPEN_MAX //1p' $(@:st=hT)`; \
1500 filename_max=`sed -n 's/^#define PATH_MAX //1p' $(@:st=hT)`; \
1501 fopen_max=$${fopen_max:-16}; \
1502 filename_max=$${filename_max:-1024}; \
1503 sed -e "s/@FOPEN_MAX@/$$fopen_max/" \
1504 -e "s/@FILENAME_MAX@/$$filename_max/" \
1505 -e "s/@L_tmpnam@/$(L_tmpnam)/" \
1506 -e "s/@TMP_MAX@/$(TMP_MAX)/" \
1507 -e "s/@L_ctermid@/$(L_ctermid)/" \
1508 -e "s/@L_cuserid@/$(L_cuserid)/" \
1510 $(move-if-change) $(@:st=h.new) $(@:st=h)
1511 # Remove these last so that they can be examined if something went wrong.
1512 rm -f $(@:st=hT) $(@:st=dT) $(@:st=dt)
1516 -include $(stdio_lim:h=d)
1518 common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st
1522 .PHONY: echo-headers
1526 %.bz2: %; bzip2 -9vk $<
1527 %.gz: %; gzip -9vnc $< > $@.new && mv -f $@.new $@
1528 %.xz: %; xz -9evk $<
1530 # Common cleaning targets.
1532 .PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean
1534 mostlyclean: common-mostlyclean
1537 -rm -f $(addprefix $(objpfx),$(addsuffix .out,$(tests) \
1541 $(addsuffix .test-result,$(tests) \
1546 # Remove the object files.
1548 -rm -f $(addprefix $(objpfx),$(tests) $(tests-internal) $(xtests) \
1550 $(others) $(sysdep-others) stubs \
1551 $(addsuffix .o,$(tests) \
1557 $(addsuffix .out,$(tests) \
1561 $(addsuffix .test-result,$(tests) \
1565 -rm -f $(addprefix $(objpfx),$(extra-objs) $(extra-test-objs) \
1566 $(install-lib) $(install-lib.so) \
1567 $(install-lib.so:%.so=%_pic.a))
1569 -rm -f $(objpfx)rtld-*.os
1572 $(foreach o,$(object-suffixes-for-libc),
1573 -rm -f $(objpfx)stamp$o $(o-objects))
1576 # Also remove the dependencies and generated source files.
1577 common-clean: common-mostlyclean
1578 -rm -f $(addprefix $(objpfx),$(generated))
1579 -rm -f $(objpfx)*.d $(objpfx)*.dt
1580 -rm -fr $(addprefix $(objpfx),$(generated-dirs))
1581 -rm -f $(addprefix $(common-objpfx),$(common-generated))
1582 -rm -f $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
1584 # Produce a file `stubs' which contains `#define __stub_FUNCTION'
1585 # for each function which is a stub.
1588 .PHONY: stubs # The parent Makefile calls this target.
1589 stubs: $(objpfx)stubs
1591 objs-for-stubs := $(foreach o,$(object-suffixes-for-libc),$(o-objects)) \
1592 $(addprefix $(objpfx),$(extra-objs))
1593 $(objpfx)stubs: $(objs-for-stubs)
1594 ifneq (,$(strip $(objs-for-stubs)))
1595 (cd $(objpfx).; $(OBJDUMP) -h $(patsubst $(objpfx)%,%,$^)) | \
1596 $(AWK) '/\.gnu\.glibc-stub\./ { \
1597 sub(/\.gnu\.glibc-stub\./, "", $$2); \
1599 END { for (s in stubs) print "#define __stub_" s }' > $@T
1605 ifneq (,$(strip $(gpl2lgpl)))
1606 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
1607 # Snarf from the master source and frob the copying notice.
1608 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
1610 # So I don't edit them by mistake.