Makerules

   1 # Copyright (C) 1991-2019 Free Software Foundation, Inc.
   2 # This file is part of the GNU C Library.
   3
   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.
   8
   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.
  13
  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/>.
  17
  18 #
  19 #       Common rules for making the GNU C library.  This file is included
  20 #       by the top-level Makefile and by all subdirectory makefiles
  21 #       (through Rules).
  22 #
  23 ifneq (,)
  24 This makefile requires GNU Make.
  25 endif
  26
  27 REQUIRED_MAKE_VERSION = 3.74
  28 REAL_MAKE_VERSION = $(firstword $(MAKE_VERSION))
  29
  30 ifneq ($(REQUIRED_MAKE_VERSION), \
  31        $(firstword $(sort $(REAL_MAKE_VERSION) $(REQUIRED_MAKE_VERSION))))
  32 Wrong GNU Make version.  See above for the version needed.
  33 endif
  34
  35
  36 ifdef   subdir
  37 ..      := ../
  38 endif   # subdir
  39
  40 # If `sources' was defined by the parent makefile, undefine it so
  41 # we will later get it from wildcard search in this directory.
  42 ifneq   "$(findstring env,$(origin sources))" ""
  43 sources :=
  44 endif
  45
  46 oPATH := $(PATH)
  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.
  50 else
  51 PATH := $(oPATH)
  52 endif
  53 \f
  54 ifndef +included-Makeconfig
  55 include $(..)Makeconfig
  56 endif
  57
  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))
  63 \f
  64 # Include any system-specific makefiles.
  65
  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) $(..)))
  71
  72 # The same is true for RPC source files.
  73 vpath %.x $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
  74                                       $(+sysdep_dirs) $(..)))
  75
  76 # Some sysdep makefiles use this to distinguish being included here from
  77 # being included individually by a subdir makefile (hurd/Makefile needs this).
  78 in-Makerules := yes
  79
  80 sysdep-makefiles := $(wildcard $(sysdirs:=/Makefile))
  81 ifneq (,$(sysdep-makefiles))
  82 include $(sysdep-makefiles)
  83 endif
  84
  85
  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%,\
  91                            $(before-compile)) \
  92                   $(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
  93                                $(before-compile))
  94
  95 # Even before that, we need abi-versions.h which is generated right here.
  96 ifeq ($(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
 102         mv -f $@T $@
 103
 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
 107         mv -f $@T $@
 108
 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 # $(build-shared) = yes
 117
 118 ifndef avoid-generated
 119 ifneq (,$(CXX))
 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 \
 130                   $(before-compile)
 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 $@
 144 endif
 145 endif
 146
 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)) \
 151                                          $(..)libc-abis) \
 152                              $(..)Makerules
 153         $(SHELL) $< \
 154                  $(base-machine)-$(config-vendor)-$(config-os) \
 155                  < $(word 2,$^) > $(@:.stamp=.h)T
 156         $(move-if-change) $(@:.stamp=.h)T $(@:.stamp=.h)
 157         touch $@
 158 common-generated += $(common-objpfx)libc-abis.h
 159 endif # avoid-generated
 160
 161 ifeq (yes,$(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)"' \
 166                 > ${@:stamp=T}
 167         $(move-if-change) ${@:stamp=T} ${@:stamp=h}
 168         touch $@
 169 endif
 170
 171 # Make sure the subdirectory for object files gets created.
 172 ifdef objpfx
 173 ifeq (,$(wildcard $(objpfx).))
 174 before-compile += $(objpfx).
 175 $(objpfx).:
 176         $(make-target-directory)
 177 endif
 178 endif
 179
 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
 184 # recompilations.
 185 before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
 186
 187 # Don't let any before-compile file be an intermediate and get removed.
 188 ifdef before-compile
 189 $(before-compile):
 190 endif
 191
 192 # We don't want $(common-objpfx) files to depend on miscellaneous stuff
 193 # in subdirs.
 194 ifdef subdir
 195 common-before-compile := $(filter-out $(objpfx)%,$(before-compile))
 196 else
 197 common-before-compile = $(before-compile)
 198 endif
 199
 200 ifndef subdir
 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.
 205 #
 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)
 209         rm -f $@T $@.dT
 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; \
 216          rm -f $@.dT) > $@T
 217         mv -f $@T $@
 218 endif
 219
 220 ifdef subdir
 221 sed-remove-dotdot := -e 's@  *\.\.\/\([^        \]*\)@ $$(..)\1@g' \
 222                      -e 's@^\.\.\/\([^  \]*\)@$$(..)\1@g'
 223 else
 224 sed-remove-dotdot := -e 's@  *\([^      \/$$][^         \]*\)@ $$(..)\1@g' \
 225                      -e 's@^\([^        \/$$][^         \]*\)@$$(..)\1@g'
 226 endif
 227
 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-as-const.py
 236
 237 # This is a hack we use to generate .py files with constants for
 238 # Python code.
 239 #
 240 # $@.tmp is a temporary file we use to store the partial contents of
 241 # the target file.  We do this instead of just writing on $@ because,
 242 # if the build process terminates prematurely, re-running Make
 243 # wouldn't run this rule since Make would see that the target file
 244 # already exists (despite it being incomplete).
 245 #
 246 # The output is redirected to a .py file; we'll import it in the main
 247 # Python code to read the constants generated by gen-as-const.py.
 248 $(py-const): $(py-const-dir)%.py: %.pysym $(py-const-script) \
 249              $(common-before-compile)
 250         $(make-target-directory)
 251         $(PYTHON) $(py-const-script) --python \
 252                   --cc="$(CC) $(CFLAGS) $(CPPFLAGS)" $< \
 253                   > $@.tmp
 254         mv -f $@.tmp $@
 255
 256 generated += $(py-const)
 257 endif  # gen-py-const-headers
 258
 259 ifdef gen-as-const-headers
 260 # Generating headers for assembly constants.
 261 # We need this defined early to get into before-compile before
 262 # it's used in sysd-rules, below.
 263 # Define GEN_AS_CONST_HEADERS to avoid circular dependency [BZ #22792].
 264 # NB: <tcb-offsets.h> is generated from tcb-offsets.sym to define
 265 # offsets and sizes of types in <tls.h> and maybe <pthread.h> which
 266 # may include <tcb-offsets.h>.  Target header files can check if
 267 # GEN_AS_CONST_HEADERS is defined to avoid circular dependency which
 268 # may lead to build hang on a many-core machine.
 269 $(common-objpfx)%.h $(common-objpfx)%.h.d: $(..)scripts/gen-as-const.py \
 270                                            %.sym $(common-before-compile)
 271         $(PYTHON) $< --cc="$(CC) $(CFLAGS) $(CPPFLAGS) -DGEN_AS_CONST_HEADERS \
 272                            -MD -MP -MF $(@:.h=.h.d)T \
 273                            -MT '$(@:.h=.h.d) $(@:.h.d=.h)'" \
 274                   $(filter %.sym,$^) > $(@:.h.d=.h)T
 275         sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
 276             $(@:.h=.h.d)T > $(@:.h=.h.d)T2
 277         rm -f $(@:.h=.h.d)T
 278         mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d)
 279         mv -f $(@:.h.d=.h)T $(@:.h.d=.h)
 280 vpath %.sym $(sysdirs)
 281 before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 282
 283 tests-internal += $(gen-as-const-headers:%.sym=test-as-const-%)
 284 generated += $(gen-as-const-headers:%.sym=test-as-const-%.c)
 285 $(objpfx)test-as-const-%.c: $(..)scripts/gen-as-const.py $(..)Makerules \
 286                             %.sym $(common-objpfx)%.h
 287         ($(AWK) '{ sub(/^/, "asconst_", $$2); print; }' $(filter %.h,$^); \
 288          $(PYTHON) $< --test $(filter %.sym,$^)) > $@T
 289         mv -f $@T $@
 290 endif
 291 \f
 292 ifeq (yes,$(build-shared))
 293 # Generate the header containing the names of all shared libraries.
 294 # We use a stamp file to avoid unnecessary recompilations.
 295 before-compile += $(common-objpfx)gnu/lib-names.h
 296 ifeq ($(soversions.mk-done),t)
 297 ifndef abi-variants
 298 lib-names-h-abi = gnu/lib-names.h
 299 lib-names-stmp-abi = gnu/lib-names.stmp
 300 else
 301 lib-names-h-abi = gnu/lib-names-$(default-abi).h
 302 lib-names-stmp-abi = gnu/lib-names-$(default-abi).stmp
 303 before-compile += $(common-objpfx)$(lib-names-h-abi)
 304 common-generated += gnu/lib-names.h
 305 install-others-nosubdir: $(inst_includedir)/$(lib-names-h-abi)
 306 $(common-objpfx)gnu/lib-names.h:
 307         $(make-target-directory)
 308         { \
 309          echo '/* This file is automatically generated.';\
 310          echo '   It defines macros to allow user program to find the shared'; \
 311          echo '   library files which come as part of GNU libc.  */'; \
 312          echo '#ifndef __GNU_LIB_NAMES_H'; \
 313          echo '#define __GNU_LIB_NAMES_H        1'; \
 314          echo ''; \
 315          $(if $(abi-includes), \
 316           $(foreach h,$(abi-includes), echo '#include <$(h)>';) \
 317           echo '';) \
 318          $(foreach v,$(abi-variants),\
 319          $(if $(abi-$(v)-condition),\
 320          echo '#if $(abi-$(v)-condition)'; \
 321          echo '# include <gnu/lib-names-$(v).h>'); \
 322          $(if $(abi-$(v)-condition),echo '#endif';)) \
 323          echo ''; \
 324          echo '#endif   /* gnu/lib-names.h */'; \
 325         } >  $@
 326 endif
 327 $(common-objpfx)$(lib-names-h-abi): $(common-objpfx)$(lib-names-stmp-abi); @:
 328 $(common-objpfx)$(lib-names-stmp-abi): $(..)scripts/lib-names.awk \
 329                                        $(common-objpfx)soversions.i
 330         $(make-target-directory)
 331         { \
 332          $(if $(abi-variants), \
 333          echo '/* This file is automatically generated.  */';\
 334          echo '#ifndef __GNU_LIB_NAMES_H'; \
 335          echo '# error "Never use <$(lib-names-h-abi)> directly; include <gnu/lib-names.h> instead."'; \
 336          echo '#endif';, \
 337          echo '/* This file is automatically generated.';\
 338          echo '   It defines macros to allow user program to find the shared'; \
 339          echo '   library files which come as part of GNU libc.  */'; \
 340          echo '#ifndef __GNU_LIB_NAMES_H'; \
 341          echo '#define __GNU_LIB_NAMES_H        1';) \
 342          echo ''; \
 343          ($(foreach s,$(all-sonames), echo $(s);)) \
 344          | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort; \
 345          $(if $(abi-variants),, \
 346          echo ''; \
 347          echo '#endif   /* gnu/lib-names.h */';) \
 348         } >  ${@:stmp=T}
 349         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
 350         touch $@
 351 endif
 352 common-generated += $(lib-names-h-abi) $(lib-names-stmp-abi)
 353 endif
 354 \f
 355 ###############################################################################
 356 # NOTE!  Everything adding to before-compile needs to come before this point! #
 357 ###############################################################################
 358
 359 # Generate an ordered list of implicit rules which find the source files in
 360 # each sysdep directory.  The old method was to use vpath to search all the
 361 # sysdep directories.  However, that had the problem that a .S file in a
 362 # later directory would be chosen over a .c file in an earlier directory,
 363 # which does not preserve the desired sysdeps ordering behavior.
 364
 365 # System-dependent makefiles can put in `inhibit-sysdep-asm' regexps
 366 # matching sysdep directories whose assembly source files should be
 367 # suppressed.
 368
 369 -include $(common-objpfx)sysd-rules
 370 ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
 371 # The value of $(+sysdep_dirs) the sysd-rules was computed for
 372 # differs from the one we are using now.  So force a rebuild of sysd-rules.
 373 sysd-rules-force = FORCE
 374 FORCE:
 375 endif
 376 $(common-objpfx)sysd-rules: $(..)scripts/sysd-rules.awk \
 377                             $(common-objpfx)config.make $(..)Makerules \
 378                             $(sysdep-makefiles) $(sysdep-makeconfigs) \
 379                             $(sysd-rules-force)
 380         -@rm -f $@T
 381         LC_ALL=C $(AWK) -f $< > $@T \
 382                         -v all_object_suffixes='$(all-object-suffixes)' \
 383                         -v inhibit_sysdep_asm='$(inhibit-sysdep-asm)' \
 384                         -v sysd_rules_patterns='$(sysd-rules-patterns)' \
 385                         -v config_sysdirs='$(config-sysdirs)'
 386         mv -f $@T $@
 387
 388 ifndef sysd-rules-done
 389 # Don't do deps until this exists, because it provides rules to make the deps.
 390 no_deps=t
 391 endif
 392
 393 define o-iterator-doit
 394 $(objpfx)%$o: %.S $(before-compile); $$(compile-command.S)
 395 endef
 396 object-suffixes-left := $(all-object-suffixes)
 397 include $(o-iterator)
 398
 399 define o-iterator-doit
 400 $(objpfx)%$o: %.c $(before-compile); $$(compile-command.c)
 401 endef
 402 object-suffixes-left := $(all-object-suffixes)
 403 include $(o-iterator)
 404
 405 define o-iterator-doit
 406 $(objpfx)%$o: %.cc $(before-compile); $$(compile-command.cc)
 407 endef
 408 object-suffixes-left := $(all-object-suffixes)
 409 include $(o-iterator)
 410
 411 # Omit the objpfx rules when building in the source tree, because
 412 # objpfx is empty and so these rules just override the ones above.
 413 ifdef objpfx
 414 # Define first rules to find the source files in $(objpfx).
 415 # Generated source files will end up there.
 416 define o-iterator-doit
 417 $(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S)
 418 endef
 419 object-suffixes-left := $(all-object-suffixes)
 420 include $(o-iterator)
 421
 422 define o-iterator-doit
 423 $(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
 424 endef
 425 object-suffixes-left := $(all-object-suffixes)
 426 include $(o-iterator)
 427 endif
 428
 429 # Generate .dT files as we compile.
 430 compile-mkdep-flags = -MD -MP -MF $@.dt -MT $@
 431 compile-command.S = $(compile.S) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 432 compile-command.c = $(compile.c) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 433 compile-command.cc = $(compile.cc) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 434
 435 # Like compile-mkdep-flags, but for use with $(BUILD_CC).  We don't want to
 436 # track system includes here, they may spuriously trigger an install rule,
 437 # and would cause the check-local-headers test to fail.
 438 native-compile-mkdep-flags = -MMD -MP -MF $@.dt -MT $@
 439
 440 # GCC can grok options after the file name, and it looks nicer that way.
 441 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
 442 compile.cc = $(CXX) $< -c $(CXXFLAGS) $(CPPFLAGS)
 443 compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \
 444                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 445 COMPILE.c = $(CC) -c $(CFLAGS) $(CPPFLAGS)
 446 COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \
 447                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 448
 449 # We need this for the output to go in the right place.  It will default to
 450 # empty if make was configured to work with a cc that can't grok -c and -o
 451 # together.  You can't compile the C library with such a compiler.
 452 OUTPUT_OPTION = -o $@
 453
 454 # This is the end of the pipeline for compiling generated C code.
 455 compile-stdin.c = $(COMPILE.c) -o $@ -x c - $(compile-mkdep-flags)
 456
 457 # We need the $(CFLAGS) to be in there to have the right predefines during
 458 # the dependency run for C sources.  But having it for assembly sources can
 459 # get the wrong predefines.
 460 S-CPPFLAGS = -DASSEMBLER $(asm-CPPFLAGS)
 461
 462 define +make-deps
 463 $(make-target-directory)
 464 $(+mkdep) $< $(if $(filter %.c,$<),$(CFLAGS)) \
 465              $(CPPFLAGS) $($(patsubst .%,%,$(suffix $(<F)))-CPPFLAGS) | sed -e\
 466 's,$(subst .,\.,$(@F:.d=.o)),$(foreach o,$(all-object-suffixes),$(@:.d=$o)) $@,' \
 467 $(sed-remove-objpfx) $(sed-remove-dotdot) > $(@:.d=.T)
 468 mv -f $(@:.d=.T) $@ $(generate-md5)
 469 endef
 470
 471 ifneq (,$(objpfx))
 472 # Continuation lines here are dangerous because they introduce spaces!
 473 define sed-remove-objpfx
 474 -e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
 475 -e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g'
 476 endef
 477 endif
 478 \f
 479 # Modify the list of routines we build for different targets
 480
 481 ifeq (yes,$(build-shared))
 482 ifndef libc.so-version
 483 # Undefine this because it can't work when we libc.so is unversioned.
 484 static-only-routines =
 485 endif
 486 endif
 487
 488 elide-routines.oS += $(filter-out $(static-only-routines),\
 489                                   $(routines) $(aux) $(sysdep_routines))
 490 elide-routines.os += $(static-only-routines)
 491
 492 # If we have versioned code we don't need the old versions in any of the
 493 # static libraries.
 494 elide-routines.o  += $(shared-only-routines)
 495 elide-routines.op += $(shared-only-routines)
 496 \f
 497 # Shared library building.
 498
 499 ifeq (yes,$(build-shared))
 500
 501 # Reference map file only when shared libraries are built and a map file name
 502 # is given.
 503 ifeq ($(build-shared),yes)
 504 map-file = $(firstword $($(@F:.so=-map)) \
 505                        $(addprefix $(common-objpfx), \
 506                                    $(filter $(@F:.so=.map),$(version-maps))))
 507 load-map-file = $(map-file:%=-Wl,--version-script=%)
 508 endif
 509
 510 # Compiler arguments to use to link a shared object with libc and
 511 # ld.so.  This is intended to be as similar as possible to a default
 512 # link with an installed libc.
 513 link-libc-args = -Wl,--start-group \
 514                  $(libc-for-link) \
 515                  $(common-objpfx)libc_nonshared.a \
 516                  $(as-needed) $(elf-objpfx)ld.so $(no-as-needed) \
 517                  -Wl,--end-group
 518
 519 # The corresponding shared libc to use.  This may be modified for a
 520 # particular target.
 521 libc-for-link = $(common-objpfx)libc.so
 522
 523 # The corresponding dependencies.  As these are used in dependencies,
 524 # not just commands, they cannot use target-specific variables so need
 525 # to name both possible libc.so objects.
 526 link-libc-deps = $(common-objpfx)libc.so $(common-objpfx)linkobj/libc.so \
 527                  $(common-objpfx)libc_nonshared.a $(elf-objpfx)ld.so
 528
 529 # Pattern rule to build a shared object from an archive of PIC objects.
 530 # This must come after the installation rules so Make doesn't try to
 531 # build shared libraries in place from the installed *_pic.a files.
 532 # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
 533 # on other shared objects.  The linking with libc and ld.so is intended
 534 # to be as similar as possible to a default link with an installed libc.
 535 lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(link-libc-deps)
 536         $(build-shlib) $(link-libc-args)
 537         $(call after-link,$@)
 538
 539 define build-shlib-helper
 540 $(LINK.o) -shared -static-libgcc -Wl,-O1 $(sysdep-LDFLAGS) \
 541           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) $(rtld-LDFLAGS) \
 542           $(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \
 543           $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
 544           -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
 545           $(LDFLAGS.so) $(LDFLAGS-lib.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
 546           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 547 endef
 548
 549 ifeq (yes,$(use-default-link))
 550 # If the linker is good enough, we can let it use its default linker script.
 551 shlib-lds =
 552 shlib-lds-flags =
 553 else
 554 # binutils only position loadable notes into the first page for binaries,
 555 # not for shared objects
 556 $(common-objpfx)shlib.lds: $(common-objpfx)config.make $(..)Makerules
 557         $(LINK.o) -shared -Wl,-O1 \
 558                   -nostdlib -nostartfiles \
 559                   $(sysdep-LDFLAGS) $(rtld-LDFLAGS) $(LDFLAGS.so) \
 560                   -Wl,--verbose 2>&1 | \
 561           sed > $@T \
 562               -e '/^=========/,/^=========/!d;/^=========/d' \
 563               $(if $(filter yes,$(have-hash-style)), \
 564                    -e 's/^.*\.gnu\.hash[        ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 565                    -e '/^[      ]*\.hash[       ]*:.*$$/{h;d;}' \
 566                    -e '/DATA_SEGMENT_ALIGN/{H;g}' \
 567                 , \
 568                    -e 's/^.*\.hash[     ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 569                ) \
 570               -e 's/^.*\*(\.dynbss).*$$/& \
 571                  PROVIDE(__start___libc_freeres_ptrs = .); \
 572                  *(__libc_freeres_ptrs) \
 573                  PROVIDE(__stop___libc_freeres_ptrs = .);/'\
 574               -e 's@^.*\*(\.jcr).*$$@& \
 575                  PROVIDE(__start___libc_subfreeres = .);\
 576                  __libc_subfreeres : { *(__libc_subfreeres) }\
 577                  PROVIDE(__stop___libc_subfreeres = .);\
 578                  PROVIDE(__start___libc_atexit = .);\
 579                  __libc_atexit : { *(__libc_atexit) }\
 580                  PROVIDE(__stop___libc_atexit = .);\
 581                  PROVIDE(__start___libc_IO_vtables = .);\
 582                  __libc_IO_vtables : { *(__libc_IO_vtables) }\
 583                  PROVIDE(__stop___libc_IO_vtables = .);\
 584                  /DISCARD/ : { *(.gnu.glibc-stub.*) }@'
 585         test -s $@T
 586         mv -f $@T $@
 587 common-generated += shlib.lds
 588
 589 shlib-lds = $(common-objpfx)shlib.lds
 590 shlib-lds-flags = -T $(shlib-lds)
 591 endif
 592
 593 define build-shlib
 594 $(build-shlib-helper) -o $@ $(shlib-lds-flags) \
 595           $(csu-objpfx)abi-note.o $(build-shlib-objlist)
 596 endef
 597
 598 define build-module-helper
 599 $(LINK.o) -shared -static-libgcc $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
 600           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
 601           -B$(csu-objpfx) $(load-map-file) \
 602           $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
 603           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 604 endef
 605
 606 # This macro is similar to build-shlib but it does not define a soname
 607 # and it does not depend on the destination name to start with `lib'.
 608 # binutils only position loadable notes into the first page for binaries,
 609 # not for shared objects
 610 define build-module
 611 $(build-module-helper) -o $@ $(shlib-lds-flags) \
 612           $(csu-objpfx)abi-note.o $(build-module-objlist) $(link-libc-args)
 613 $(call after-link,$@)
 614 endef
 615 define build-module-asneeded
 616 $(build-module-helper) -o $@ $(shlib-lds-flags) \
 617           $(csu-objpfx)abi-note.o \
 618           -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed \
 619           $(link-libc-args)
 620 $(call after-link,$@)
 621 endef
 622
 623 # sofini.os must be placed last since it terminates .eh_frame section.
 624 build-module-helper-objlist = \
 625         $(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\
 626                    $(filter-out %.lds $(map-file) $(+preinit) $(+postinit) \
 627                                 $(elf-objpfx)sofini.os \
 628                                 $(link-libc-deps),$^))
 629
 630 build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so)
 631 build-shlib-objlist = $(build-module-helper-objlist) \
 632                       $(LDLIBS-$(@F:lib%.so=%).so) \
 633                       $(filter $(elf-objpfx)sofini.os,$^)
 634
 635 # Don't try to use -lc when making libc.so itself.
 636 # Also omits crti.o and crtn.o, which we do not want
 637 # since we define our own `.init' section specially.
 638 LDFLAGS-c.so = -nostdlib -nostartfiles
 639 # But we still want to link libc.so against $(libc.so-gnulib).
 640 LDLIBS-c.so += $(libc.so-gnulib)
 641 # Give libc.so an entry point and make it directly runnable itself.
 642 LDFLAGS-c.so += -e __libc_main
 643 # Pre-link the objects of libc_pic.a so that we can locally resolve
 644 # COMMON symbols before we link against ld.so.  This is because ld.so
 645 # contains some of libc_pic.a already, which will prevent the COMMONs
 646 # from being allocated in libc.so, which introduces evil dependencies
 647 # between libc.so and ld.so, which can make it impossible to upgrade.
 648 $(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
 649         $(LINK.o) -nostdlib -nostartfiles -r -o $@ \
 650         $(LDFLAGS-c_pic.os) -Wl,-d $(whole-archive) $^ -o $@
 651
 652 ifeq (,$(strip $(shlib-lds-flags)))
 653 # Generate a list of -R options to excise .gnu.glibc-stub.* sections.
 654 $(common-objpfx)libc_pic.opts: $(common-objpfx)libc_pic.os
 655         $(OBJDUMP) -h $< | \
 656         $(AWK) '$$2 ~ /\.gnu\.glibc-stub\./ { print "-R", $$2 }' \
 657                 > $@T
 658         mv -f $@T $@
 659 # Apply those -R options.
 660 $(common-objpfx)libc_pic.os.clean: $(common-objpfx)libc_pic.opts \
 661                                    $(common-objpfx)libc_pic.os
 662         $(OBJCOPY) @$^ $@
 663 generated += libc_pic.opts libc_pic.os.clean
 664
 665 libc_pic_clean := .clean
 666 endif
 667
 668 # Build a possibly-modified version of libc_pic.a for use in building
 669 # linkobj/libc.so.
 670 ifeq (,$(filter sunrpc,$(subdirs)))
 671 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a
 672         $(make-target-directory)
 673         ln -f $< $@
 674 else
 675 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a \
 676                                     $(common-objpfx)sunrpc/librpc_compat_pic.a
 677         $(make-target-directory)
 678         (cd $(common-objpfx)linkobj; \
 679          $(AR) x ../libc_pic.a; \
 680          rm $$($(AR) t ../sunrpc/librpc_compat_pic.a | sed 's/^compat-//'); \
 681          $(AR) x ../sunrpc/librpc_compat_pic.a; \
 682          $(AR) cr libc_pic.a *.os; \
 683          rm *.os)
 684 endif # $(subdirs) contains sunrpc
 685
 686 # Clear link-libc-deps for the libc.so libraries so build-shlibs does not
 687 # filter ld.so out of the list of linked objects.
 688 $(common-objpfx)libc.so: link-libc-deps = # empty
 689 $(common-objpfx)linkobj/libc.so: link-libc-deps = # empty
 690
 691 # Use our own special initializer and finalizer files for the libc.so
 692 # libraries.
 693 $(common-objpfx)libc.so: $(elf-objpfx)soinit.os \
 694                          $(common-objpfx)libc_pic.os$(libc_pic_clean) \
 695                          $(elf-objpfx)sofini.os \
 696                          $(elf-objpfx)interp.os \
 697                          $(elf-objpfx)ld.so \
 698                          $(shlib-lds)
 699         $(build-shlib)
 700         $(call after-link,$@)
 701
 702 $(common-objpfx)linkobj/libc.so: $(elf-objpfx)soinit.os \
 703                          $(common-objpfx)linkobj/libc_pic.a \
 704                          $(elf-objpfx)sofini.os \
 705                          $(elf-objpfx)interp.os \
 706                          $(elf-objpfx)ld.so \
 707                          $(shlib-lds)
 708         $(build-shlib)
 709         $(call after-link,$@)
 710
 711 ifeq ($(build-shared),yes)
 712 $(common-objpfx)libc.so: $(common-objpfx)libc.map
 713 endif
 714 common-generated += libc.so libc_pic.os
 715 ifdef libc.so-version
 716 $(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
 717         $(make-link)
 718 common-generated += libc.so$(libc.so-version)
 719 endif
 720 endif
 721 \f
 722 # Figure out the source filenames in this directory.
 723
 724 override sources := $(addsuffix .c,\
 725                         $(filter-out $(elided-routines),\
 726                             $(routines) $(aux) \
 727                             $(sysdep_routines)))
 728 sysdep_routines := $(sysdep_routines)
 729
 730 headers := $(headers) $(sysdep_headers)
 731
 732 # This is the list of all object files, gotten by
 733 # replacing every ".c" in `sources' with a ".o".
 734 override objects := $(addprefix $(objpfx),$(sources:.c=.o))
 735
 736
 737 # The makefile may define $(extra-libs) with `libfoo libbar'
 738 # to build libfoo.a et al from the modules listed in $(libfoo-routines).
 739 ifdef extra-libs
 740 # extra-lib.mk is included once for each extra lib to define rules
 741 # to build it, and to add its objects to the various variables.
 742 # During its evaluation, $(lib) is set to the name of the library.
 743 extra-libs-left := $(extra-libs)
 744 include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
 745 endif
 746
 747
 748 # The makefile may define $(modules-names) to build additional modules.
 749 # These are built with $(build-module), except any in $(modules-names-nobuild).
 750 # MODULE_NAME=extramodules, except any in $(modules-names-tests).
 751 ifdef modules-names
 752 cpp-srcs-left := $(filter-out $(modules-names-tests),$(modules-names))
 753 ifneq (,$(cpp-srcs-left))
 754 lib := extramodules
 755 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
 756 endif
 757
 758 ifdef modules-names-tests
 759 cpp-srcs-left := $(filter $(modules-names-tests),$(modules-names))
 760 ifneq (,$(cpp-srcs-left))
 761 lib := testsuite
 762 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
 763 endif
 764 endif
 765
 766 extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names))
 767 $(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \
 768                 $(objpfx)%.os $(shlib-lds) $(link-libs-deps)
 769         $(build-module)
 770 endif
 771 \f
 772 +depfiles := $(sources:.c=.d) \
 773              $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \
 774              $(patsubst %.oS,%.d,$(filter %.oS,$(extra-objs))) \
 775              $(patsubst %.o,%.d,$(filter %.o,$(extra-test-objs:.os=.o))) \
 776              $(addsuffix .d,$(tests) $(tests-internal) $(xtests) $(test-srcs))
 777 ifeq ($(build-programs),yes)
 778 +depfiles += $(addsuffix .d,$(others) $(sysdep-others))
 779 endif
 780 +depfiles := $(addprefix $(objpfx),\
 781                          $(filter-out $(addsuffix .d,$(omit-deps)),\
 782                                       $(+depfiles)))
 783 all-dt-files := $(foreach o,$(object-suffixes-for-libc),$(+depfiles:.d=$o.dt))
 784 +depfiles := $(patsubst %.dt,%.d,$(wildcard $(all-dt-files))) \
 785              $(wildcard $(all-dt-files:.dt=.d))
 786
 787 # This is a funny rule in that it removes its input file.
 788 %.d: %.dt
 789         @sed $(sed-remove-objpfx) $< > $(@:.d=.T) && \
 790          mv -f $(@:.d=.T) $@ && \
 791          rm -f $<
 792
 793 # Avoid the .h.d files for any .sym files whose .h files don't exist yet.
 794 # They will be generated when they're needed, and trying too early won't work.
 795 +gen-as-const := $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 796 +depfiles += $(addsuffix .d,$(filter $(wildcard $(+gen-as-const)),\
 797                                                 $(+gen-as-const)))
 798
 799 ifdef +depfiles
 800 ifneq ($(no_deps),t)
 801 -include $(+depfiles)
 802 endif
 803 endif
 804 \f\f
 805 # Maximize efficiency by minimizing the number of rules.
 806 .SUFFIXES:      # Clear the suffix list.  We don't use suffix rules.
 807 # Don't define any builtin rules.
 808 MAKEFLAGS := $(MAKEFLAGS)r
 809
 810 # Generic rule for making directories.
 811 %/:
 812 # mkdir isn't smart enough to strip a trailing /.
 813 # We always require a mkdir which supports the -p option to avoid error
 814 # messages in case of races.
 815         mkdir -p $(@:%/=%)
 816 \f
 817 # Make sure that object files are not removed
 818 # when they are intermediates between sources and library members.
 819 .PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes))
 820
 821 # Make sure that the parent library archive is never removed.
 822 .PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 823 \f
 824 # Use the verbose option of ar and tar when not running silently.
 825 ifeq    "$(findstring s,$(MAKEFLAGS))" ""       # if not -s
 826 verbose := v
 827 else                                            # -s
 828 verbose :=
 829 endif                                           # not -s
 830
 831 ARFLAGS := r$(verbose)
 832 CREATE_ARFLAGS := cru$(verbose)
 833 \f
 834 # This makes all the object files in the parent library archive.
 835
 836 .PHONY: lib lib-noranlib
 837 lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 838 lib-noranlib: libobjs
 839
 840 # For object-suffix $o, the list of objects with that suffix.
 841 # Makefiles can define `elide-routines.so = foo' to leave foo.so out.
 842 o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
 843                                                        $(elide-routines$o)),\
 844                                             $(objects))) \
 845             $(addprefix $(objpfx),$(o-objects$o))
 846
 847 others: $(addprefix $(objpfx),$(install-lib))
 848
 849 ifndef objects
 850
 851 # Create the stamp$o files to keep the parent makefile happy.
 852 subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 853 $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o):
 854         $(make-target-directory)
 855         rm -f $@; > $@
 856 else
 857
 858 # Define explicit rules to update each $(objpfx)stamp.SUFFIX
 859 # timestamp file; these rules (one explicit rule is generated for each
 860 # object suffix) write a list of objects to update in the stamp file.
 861 # The parent will then actually add them all to the archive in the
 862 # archive rule, below.
 863 define o-iterator-doit
 864 $(objpfx)stamp$o: $(o-objects); $$(do-stamp)
 865 endef
 866 define do-stamp
 867 $(make-target-directory)
 868 echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T
 869 mv -f $@T $@
 870 endef
 871 object-suffixes-left := $(object-suffixes-for-libc)
 872 include $(o-iterator)
 873
 874 endif
 875
 876 # Now define explicit rules to build the library archives; these depend
 877 # on the stamp files built above.
 878 define o-iterator-doit
 879 $(common-objpfx)$(patsubst %,$(libtype$o),c): \
 880                 $(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib)
 881 endef
 882 define do-makelib
 883 cd $(common-objdir) && \
 884 $(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)`
 885 endef
 886 subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%)
 887 subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
 888 ifndef subdir
 889 $(subdirs-stamps): subdir_lib;
 890 endif
 891 object-suffixes-left = $(object-suffixes-for-libc)
 892 include $(o-iterator)
 893
 894
 895 # This makes all the object files.
 896 .PHONY: objects objs libobjs extra-objs
 897 objects objs: libobjs extra-objs
 898 libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 899 extra-objs: $(addprefix $(objpfx),$(extra-objs))
 900
 901 # Canned sequence for building an extra library archive.
 902 define build-extra-lib
 903 $(patsubst %/,cd % &&,$(objpfx)) \
 904 $(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \
 905       $(patsubst $(objpfx)%,%,$^)
 906 endef
 907 \f
 908 # Installation.
 909
 910 .PHONY: force-install
 911 force-install:
 912
 913 # $(install-lib) are installed from the object directory into $(libdir);
 914 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
 915 # unless they also appear in $(non-lib.a).  $(install-data) are installed as
 916 # they are into $(datadir).  $(headers) are installed as they are in
 917 # $(includedir).  $(install-bin), $(install-bin-script) and $(install-sbin)
 918 # are installed from the object directory into $(bindir), $(bindir) and
 919 # $(sbindir), respectively.  $(install-others) and $(install-others-programs)
 920 # are absolute path names of files to install; rules to install them are
 921 # defined elsewhere.
 922
 923 # The simple library name to install libc.a under.
 924 # This could be defined by a sysdep Makefile.
 925 ifndef libc-name
 926 libc-name := c
 927 endif
 928
 929 define do-install
 930 $(make-target-directory)
 931 $(INSTALL_DATA) $< $@
 932 endef
 933
 934 # Make the target directory if it doesn't exist, using the `mkinstalldirs'
 935 # script that does `mkdir -p' even if `mkdir' doesn't support that flag.
 936 define make-target-directory
 937 $(addprefix $(..)./scripts/mkinstalldirs ,\
 938             $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
 939 endef
 940
 941 # Any directory (parent or subdir) should install libc.a; this way
 942 # "make install" in a subdir is guaranteed to install everything it changes.
 943 installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
 944                              $(inst_libdir)/$(patsubst %,$(libtype$o),\
 945                                                      $(libprefix)$(libc-name)))
 946
 947 .PHONY: check-install-supported
 948 check-install-supported:
 949
 950 # Check to see if the prefix or exec_prefix GNU standard variable
 951 # has been overridden on the command line and, if so, fail with
 952 # an error message since doing so is not supported (set DESTDIR
 953 # instead).
 954 ifeq ($(origin prefix),command line)
 955 check-install-supported:
 956         $(error Overriding prefix is not supported. Set DESTDIR instead.)
 957 endif
 958
 959 ifeq ($(origin exec_prefix),command line)
 960 check-install-supported:
 961         $(error Overriding exec_prefix is not supported. Set DESTDIR instead.)
 962 endif
 963
 964 install: check-install-supported
 965
 966 install: $(installed-libcs)
 967 $(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
 968         $(make-target-directory)
 969         $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
 970
 971 define do-install-program
 972 $(make-target-directory)
 973 $(INSTALL_PROGRAM) $< $@.new
 974 mv -f $@.new $@
 975 endef
 976
 977 define do-install-script
 978 $(make-target-directory)
 979 $(INSTALL_SCRIPT) $< $@.new
 980 mv -f $@.new $@
 981 endef
 982
 983 install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
 984 install-lib := $(filter-out %.so %_pic.a,$(install-lib))
 985
 986 ifeq (yes,$(build-shared))
 987 # Find which .so's have versions.
 988 versioned := $(strip $(foreach so,$(install-lib.so),\
 989                                $(patsubst %,$(so),$($(so)-version))))
 990
 991 install-lib.so-versioned := $(filter $(versioned), $(install-lib.so))
 992 install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so))
 993
 994 # For versioned libraries, we install three files:
 995 #       $(inst_libdir)/libfoo.so        -- for linking, symlink or ld script
 996 #       $(inst_slibdir)/libfoo.so.NN    -- for loading by SONAME, symlink
 997 #       $(inst_slibdir)/libfoo-X.Y.Z.so -- the real shared object file
 998 lib-version := $(firstword $($(subdir)-version) $(version))
 999 install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \
1000                       $(foreach L,$(install-lib.so-versioned),\
1001                                 $(inst_libdir)/$L \
1002                                 $(inst_slibdir)/$(L:.so=)-$(lib-version).so \
1003                                 $(inst_slibdir)/$L$($L-version))
1004
1005 # Install all the unversioned shared libraries.
1006 $(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \
1007     $(objpfx)%.so $(+force)
1008         $(do-install-program)
1009
1010 ifneq ($(findstring -s,$(LN_S)),)
1011 define make-link
1012 rm -f $@.new
1013 $(SHELL) $(..)scripts/rellns-sh $< $@.new
1014 mv -f $@.new $@
1015 endef
1016 define make-link-multidir
1017 $(patsubst %/,cd %,$(objpfx)); \
1018   $(addprefix $(abspath $(..)scripts/mkinstalldirs) ,$(dir $(multidir))); \
1019   $(LN_S) . $(multidir) 2> /dev/null; \
1020   test -L $(multidir)
1021 endef
1022 else
1023 # If we have no symbolic links don't bother with rellns-sh.
1024 define make-link
1025 rm -f $@.new
1026 $(LN_S) $< $@.new
1027 mv -f $@.new $@
1028 endef
1029 define make-link-multidir
1030 $(make-target-directory)
1031 ln -f $(objpfx)/$(@F) $@
1032 endef
1033 endif
1034
1035 ifeq (yes,$(build-shared))
1036 ifeq (no,$(cross-compiling))
1037 symbolic-link-prog := $(elf-objpfx)sln
1038 symbolic-link-list := $(elf-objpfx)symlink.list
1039 define make-shlib-link
1040 echo `$(..)scripts/rellns-sh -p $< $@` $@ >> $(symbolic-link-list)
1041 endef
1042 else # cross-compiling
1043 # We need a definition that can be used by elf/Makefile's install rules.
1044 symbolic-link-prog = $(LN_S)
1045 endif
1046 endif
1047 ifndef make-shlib-link
1048 define make-shlib-link
1049 rm -f $@
1050 $(LN_S) `$(..)scripts/rellns-sh -p $< $@` $@
1051 endef
1052 endif
1053
1054 ifdef libc.so-version
1055 # For a library specified to be version N, install three files:
1056 # libc.so       ->      libc.so.N       (e.g. libc.so.6)
1057 # libc.so.6     ->      libc-VERSION.so (e.g. libc-1.10.so)
1058
1059 $(inst_slibdir)/libc.so$(libc.so-version): $(inst_slibdir)/libc-$(version).so \
1060                                            $(+force)
1061         $(make-shlib-link)
1062 $(inst_slibdir)/libc-$(version).so: $(common-objpfx)libc.so $(+force)
1063         $(do-install-program)
1064 install: $(inst_slibdir)/libc.so$(libc.so-version)
1065
1066 # This fragment of linker script gives the OUTPUT_FORMAT statement
1067 # for the configuration we are building.  We put this statement into
1068 # the linker scripts we install for -lc et al so that they will not be
1069 # used by a link for a different format on a multi-architecture system.
1070 $(common-objpfx)format.lds: $(..)scripts/output-format.sed \
1071                             $(common-objpfx)config.make \
1072                             $(common-objpfx)config.h $(..)Makerules
1073 ifneq (unknown,$(output-format))
1074         echo > $@.new 'OUTPUT_FORMAT($(output-format))'
1075 else
1076         $(LINK.o) -shared $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
1077                   $(LDFLAGS.so) $(LDFLAGS-lib.so) \
1078                   -x c /dev/null -o $@.so -Wl,--verbose -v 2>&1 \
1079         | sed -n -f $< > $@.new
1080         test -s $@.new
1081         rm -f $@.so
1082 endif
1083         mv -f $@.new $@
1084 common-generated += format.lds
1085
1086 ifndef subdir
1087 # What we install as libc.so for programs to link against is in fact a
1088 # link script.  It contains references for the various libraries we need.
1089 # The libc.so object is not complete since some functions are only defined
1090 # in libc_nonshared.a.
1091 # We need to use absolute paths since otherwise local copies (if they exist)
1092 # of the files are taken by the linker.
1093 install: $(inst_libdir)/libc.so
1094 $(inst_libdir)/libc.so: $(common-objpfx)format.lds \
1095                         $(common-objpfx)libc.so$(libc.so-version) \
1096                         $(inst_libdir)/$(patsubst %,$(libtype.oS),\
1097                                                   $(libprefix)$(libc-name)) \
1098                         $(+force)
1099         (echo '/* GNU ld script';\
1100          echo '   Use the shared library, but some functions are only in';\
1101          echo '   the static library, so try that secondarily.  */';\
1102          cat $<; \
1103          echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \
1104               '$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\
1105               ' AS_NEEDED (' $(rtlddir)/$(rtld-installed-name) ') )' \
1106         ) > $@.new
1107         mv -f $@.new $@
1108
1109 endif
1110
1111 else
1112 install: $(inst_slibdir)/libc.so
1113 $(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force)
1114         $(do-install-program)
1115 endif
1116
1117 ifneq (,$(versioned))
1118 # Produce three sets of rules as above for all the smaller versioned libraries.
1119
1120 define o-iterator-doit
1121 $(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link)
1122 endef
1123 object-suffixes-left := $(filter-out $(install-lib-ldscripts),$(versioned))
1124 ifneq (,$(object-suffixes-left))
1125 include $(o-iterator)
1126 endif
1127
1128 # Make symlinks in the build directory, because the versioned names might
1129 # be referenced by a DT_NEEDED in another library.
1130 define o-iterator-doit
1131 $(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
1132 endef
1133 object-suffixes-left := $(versioned)
1134 include $(o-iterator)
1135
1136 generated += $(foreach o,$(versioned),$o$($o-version))
1137
1138 ifeq (,$($(subdir)-version))
1139 define o-iterator-doit
1140 $(inst_slibdir)/$o$($o-version): $(inst_slibdir)/$(o:.so=)-$(version).so \
1141                                  $(+force);
1142         $$(make-shlib-link)
1143 endef
1144 object-suffixes-left := $(versioned)
1145 include $(o-iterator)
1146
1147 define o-iterator-doit
1148 $(inst_slibdir)/$(o:.so=)-$(version).so: $(objpfx)$o $(+force);
1149         $$(do-install-program)
1150 endef
1151 object-suffixes-left := $(versioned)
1152 include $(o-iterator)
1153 else
1154 define o-iterator-doit
1155 $(inst_slibdir)/$o$($o-version): \
1156   $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so $(+force);
1157         $$(make-shlib-link)
1158 endef
1159 object-suffixes-left := $(versioned)
1160 include $(o-iterator)
1161
1162 define o-iterator-doit
1163 $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so: $(objpfx)$o $(+force);
1164         $$(do-install-program)
1165 endef
1166 object-suffixes-left := $(versioned)
1167 include $(o-iterator)
1168 endif
1169 endif
1170
1171 define do-install-so
1172 $(do-install-program)
1173 $(patsubst %,$(LN_S) -f $(@F) \
1174                         $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
1175            $(filter-out %.so,$@))
1176 endef
1177
1178 so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
1179 $(foreach v,$(so-versions),\
1180           $(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \
1181                                                $(+force)
1182         $(do-install-so)
1183 $(foreach v,$(so-versions),\
1184           $(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force)
1185         $(do-install-so)
1186 endif
1187
1188 ifdef install-bin
1189 $(addprefix $(inst_bindir)/,$(install-bin)): \
1190     $(inst_bindir)/%: $(objpfx)% $(+force)
1191         $(do-install-program)
1192 endif
1193 ifdef install-bin-script
1194 $(addprefix $(inst_bindir)/,$(install-bin-script)): \
1195     $(inst_bindir)/%: $(objpfx)% $(+force)
1196         $(do-install-script)
1197 endif
1198 ifdef install-rootsbin
1199 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \
1200    $(inst_rootsbindir)/%: $(objpfx)% $(+force)
1201         $(do-install-program)
1202 endif
1203 ifdef install-sbin
1204 $(addprefix $(inst_sbindir)/,$(install-sbin)): \
1205     $(inst_sbindir)/%: $(objpfx)% $(+force)
1206         $(do-install-program)
1207 endif
1208 ifdef install-lib
1209 install-lib.a := $(filter lib%.a,$(install-lib))
1210 install-lib.a := $(filter-out $(install-lib-ldscripts),$(install-lib.a))
1211 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
1212 ifdef install-lib-non.a
1213 $(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
1214   $(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force)
1215         $(do-install)
1216 endif
1217 ifdef install-lib.a
1218 $(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \
1219   $(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force)
1220         $(do-install)
1221 endif
1222 endif
1223 ifdef install-data
1224 $(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force)
1225         $(do-install)
1226 endif
1227 headers := $(strip $(headers))
1228 ifdef headers
1229 # This implicit rule installs headers from the source directory.
1230 # It may be ignored in preference to rules from sysd-rules to find
1231 # headers in the sysdeps tree.
1232 $(inst_includedir)/%.h: $(objpfx)%.h $(+force)
1233         $(do-install)
1234 $(inst_includedir)/%.h: $(common-objpfx)%.h $(+force)
1235         $(do-install)
1236 $(inst_includedir)/%.h: %.h $(+force)
1237         $(do-install)
1238 $(inst_includedir)/%.h: $(..)include/%.h $(+force)
1239         $(do-install)
1240 headers-nonh := $(filter-out %.h,$(headers))
1241 ifdef headers-nonh
1242 $(addprefix $(inst_includedir)/,$(headers-nonh)): $(inst_includedir)/%: \
1243                                                  % $(+force)
1244         $(do-install)
1245 endif   # headers-nonh
1246 endif   # headers
1247
1248 .PHONY: install-bin-nosubdir install-bin-script-nosubdir \
1249         install-rootsbin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
1250         install-data-nosubdir install-headers-nosubdir
1251 install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin))
1252 install-bin-script-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin-script))
1253 install-rootsbin-nosubdir: \
1254         $(addprefix $(inst_rootsbindir)/,$(install-rootsbin))
1255 install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin))
1256 install-lib-nosubdir: $(addprefix $(inst_libdir)/,\
1257                        $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
1258                        $(addprefix $(libprefix),$(install-lib-non.a)))
1259 install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data))
1260 install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers))
1261 install-others-nosubdir: $(install-others)
1262 install-others-programs-nosubdir: $(install-others-programs)
1263
1264 # We need all the `-nosubdir' targets so that `install' in the parent
1265 # doesn't depend on several things which each iterate over the subdirs.
1266 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
1267 # subroutine.  Then in the parent `install-FOO' also causes subdir makes.
1268 install-%:: install-%-nosubdir ;
1269
1270 .PHONY: install install-no-libc.a-nosubdir
1271 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir \
1272                             install-lib-nosubdir install-others-nosubdir
1273 ifeq ($(build-programs),yes)
1274 install-no-libc.a-nosubdir: install-bin-nosubdir install-bin-script-nosubdir \
1275                             install-rootsbin-nosubdir install-sbin-nosubdir \
1276                             install-others-programs-nosubdir
1277 endif
1278 install: install-no-libc.a-nosubdir
1279 \f
1280 # Command to compile $< using the native libraries.
1281 define native-compile
1282 $(make-target-directory)
1283 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
1284             $< $(OUTPUT_OPTION) $(BUILD_LDFLAGS)
1285 endef
1286
1287 # We always want to use configuration definitions.
1288 ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) -D_GNU_SOURCE \
1289                    -DIS_IN_build -include $(common-objpfx)config.h
1290
1291 # Support the GNU standard name for this target.
1292 .PHONY: check
1293 check: tests
1294 # Special target to run tests which cannot be run unconditionally.
1295 # Maintainers should use this target.
1296 .PHONY: xcheck
1297 xcheck: xtests
1298
1299 # The only difference between MODULE_NAME=testsuite and MODULE_NAME=nonlib is
1300 # that almost all internal declarations from config.h, libc-symbols.h, and
1301 # include/*.h are not available to 'testsuite' code, but are to 'nonlib' code.
1302 all-testsuite := $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) \
1303                  $(tests-container))
1304 ifneq (,$(all-testsuite))
1305 cpp-srcs-left = $(all-testsuite)
1306 lib := testsuite
1307 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
1308 endif
1309
1310 all-nonlib := $(strip $(tests-internal) $(test-internal-extras) \
1311                       $(others) $(others-extras))
1312 ifneq (,$(all-nonlib))
1313 cpp-srcs-left = $(all-nonlib)
1314 lib := nonlib
1315 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
1316 endif
1317
1318
1319 ifeq ($(build-shared),yes)
1320 # Generate normalized lists of symbols, versions, and data sizes.
1321 # This is handy for checking against existing library binaries.
1322
1323 %.symlist: $(..)scripts/abilist.awk %.dynsym
1324         LC_ALL=C $(AWK) -f $^ > $@T
1325         mv -f $@T $@
1326
1327 %.dynsym: %.so
1328         LC_ALL=C $(OBJDUMP) --dynamic-syms $< > $@T
1329         mv -f $@T $@
1330
1331 vpath %.abilist $(+sysdep_dirs)
1332
1333 # The .PRECIOUS rule prevents the files built by an implicit rule whose
1334 # target pattern is %.symlist from being considered "intermediate files"
1335 # and automatically removed.  We only want these files to be removed by
1336 # 'make clean', which is handled by the 'generated' variable.
1337 .PRECIOUS: %.symlist
1338 generated += $(extra-libs:=.symlist)
1339
1340 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1341                           $(objpfx)%.symlist
1342         $(check-abi); \
1343         $(evaluate-test)
1344 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1345                           $(common-objpfx)%.symlist
1346         $(check-abi); \
1347         $(evaluate-test)
1348 define check-abi
1349         diff -p -U 0 $(filter %.abilist,$^) $(filter %.symlist,$^) > $@
1350 endef
1351
1352 update-abi-%: $(objpfx)%.symlist %.abilist
1353         $(update-abi)
1354 update-abi-%: $(common-objpfx)%.symlist %.abilist
1355         $(update-abi)
1356 define update-abi
1357 @if cmp -s $^ 2> /dev/null; \
1358  then \
1359       echo '+++ $(filter %.abilist,$^) is unchanged'; \
1360  else cp -f $^; \
1361       echo '*** Now check $(filter %.abilist,$^) changes for correctness ***'; \
1362  fi
1363 endef
1364
1365 # Patch all .abilist files for one DSO.  The find command locates abilist
1366 # files for all architectures.  The abilist files in /generic/ are
1367 # filtered out because these are expected to remain empty.
1368 define update-all-abi
1369 $(SHELL) $(..)scripts/update-abilist.sh $^ \
1370   $$(find $(..)sysdeps -name '$*.abilist' \! -path '*/generic/*')
1371 endef
1372 update-all-abi-%: %.abilist $(objpfx)%.symlist
1373         $(update-all-abi)
1374 update-all-abi-%: %.abilist $(common-objpfx)%.symlist
1375         $(update-all-abi)
1376
1377 .PHONY: update-abi update-all-abi check-abi
1378 update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned))
1379 update-all-abi: $(patsubst %.so,update-all-abi-%,$(install-lib.so-versioned))
1380 check-abi-list = $(patsubst %.so,$(objpfx)check-abi-%.out, \
1381                                  $(install-lib.so-versioned))
1382 check-abi: $(check-abi-list)
1383 ifdef subdir
1384 subdir_check-abi: check-abi
1385 subdir_update-abi: update-abi
1386 subdir_update-all-abi: update-all-abi
1387 else
1388 check-abi: subdir_check-abi
1389         if grep -q '^FAIL:' $(objpfx)*/check-abi*.test-result; then \
1390                 cat $(objpfx)*/check-abi*.out && exit 1; fi
1391 update-abi: subdir_update-abi
1392 update-all-abi: subdir_update-all-abi
1393 endif
1394
1395 ifeq ($(subdir),elf)
1396 check-abi: $(objpfx)check-abi-libc.out
1397 tests-special += $(objpfx)check-abi-libc.out
1398 update-abi: update-abi-libc
1399 update-all-abi: update-all-abi-libc
1400 common-generated += libc.symlist
1401 endif
1402
1403 ifeq ($(build-shared),yes)
1404 ifdef subdir
1405 tests-special += $(check-abi-list)
1406 endif
1407 endif
1408
1409 endif
1410 \f
1411 # These will have been set by sysdeps/posix/Makefile.
1412 L_tmpnam  ?= 1
1413 TMP_MAX   ?= 0
1414 L_ctermid ?= 1
1415 L_cuserid ?= 1
1416
1417 stdio_lim = $(common-objpfx)bits/stdio_lim.h
1418
1419 $(stdio_lim:lim.h=%.h) $(stdio_lim:lim.h=%.d): $(stdio_lim:lim.h=%.st); @:
1420 $(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \
1421                    $(common-objpfx)config.make
1422         $(make-target-directory)
1423         { echo '#include "$(..)posix/bits/posix1_lim.h"';               \
1424         } |                                                             \
1425         $(CC) -E -dM -MD -MP -MF $(@:st=dT) -MT '$(@:st=h) $(@:st=d)'   \
1426               $(CPPUNDEFS) $(+includes) -xc - -o $(@:st=hT)
1427         sed $(sed-remove-objpfx) $(sed-remove-dotdot)                   \
1428             $(@:st=dT) > $(@:st=dt)
1429         mv -f $(@:st=dt) $(@:st=d)
1430         fopen_max=`sed -n 's/^#define OPEN_MAX //1p' $(@:st=hT)`;       \
1431         filename_max=`sed -n 's/^#define PATH_MAX //1p' $(@:st=hT)`;    \
1432         fopen_max=$${fopen_max:-16};                                    \
1433         filename_max=$${filename_max:-1024};                            \
1434         sed -e "s/@FOPEN_MAX@/$$fopen_max/"                             \
1435             -e "s/@FILENAME_MAX@/$$filename_max/"                       \
1436             -e "s/@L_tmpnam@/$(L_tmpnam)/"                              \
1437             -e "s/@TMP_MAX@/$(TMP_MAX)/"                                \
1438             -e "s/@L_ctermid@/$(L_ctermid)/"                            \
1439             -e "s/@L_cuserid@/$(L_cuserid)/"                            \
1440             $< > $(@:st=h.new)
1441         $(move-if-change) $(@:st=h.new) $(@:st=h)
1442 # Remove these last so that they can be examined if something went wrong.
1443         rm -f $(@:st=hT) $(@:st=dT) $(@:st=dt)
1444         touch $@
1445 # Get dependencies.
1446 ifndef no_deps
1447 -include $(stdio_lim:h=d)
1448 endif
1449 common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st
1450 \f
1451 FORCE:
1452
1453 .PHONY: echo-headers
1454 echo-headers:
1455         @echo $(headers)
1456
1457 %.bz2: %; bzip2 -9vk $<
1458 %.gz: %; gzip -9vnc $< > $@.new && mv -f $@.new $@
1459 %.xz: %; xz -9evk $<
1460 \f
1461 # Common cleaning targets.
1462
1463 .PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean
1464 clean: common-clean
1465 mostlyclean: common-mostlyclean
1466
1467 do-tests-clean:
1468         -rm -f $(addprefix $(objpfx),$(addsuffix .out,$(tests) \
1469                                                       $(tests-internal) \
1470                                                       $(xtests) \
1471                                                       $(test-srcs)) \
1472                                      $(addsuffix .test-result,$(tests) \
1473                                                               $(tests-internal) \
1474                                                               $(xtests) \
1475                                                               $(test-srcs)))
1476
1477 # Remove the object files.
1478 common-mostlyclean:
1479         -rm -f $(addprefix $(objpfx),$(tests) $(tests-internal) $(xtests) \
1480                                      $(test-srcs) \
1481                                      $(others) $(sysdep-others) stubs \
1482                                      $(addsuffix .o,$(tests) \
1483                                                     $(tests-internal) \
1484                                                     $(xtests) \
1485                                                     $(test-srcs) \
1486                                                     $(others) \
1487                                                     $(sysdep-others)) \
1488                                      $(addsuffix .out,$(tests) \
1489                                                       $(tests-internal) \
1490                                                       $(xtests) \
1491                                                       $(test-srcs)) \
1492                                      $(addsuffix .test-result,$(tests) \
1493                                                               $(tests-internal) \
1494                                                               $(xtests) \
1495                                                               $(test-srcs)))
1496         -rm -f $(addprefix $(objpfx),$(extra-objs) $(extra-test-objs) \
1497                                      $(install-lib) $(install-lib.so) \
1498                                      $(install-lib.so:%.so=%_pic.a))
1499         -rm -f core
1500         -rm -f $(objpfx)rtld-*.os
1501         $(rmobjs)
1502 define rmobjs
1503 $(foreach o,$(object-suffixes-for-libc),
1504 -rm -f $(objpfx)stamp$o $(o-objects))
1505 endef
1506
1507 # Also remove the dependencies and generated source files.
1508 common-clean: common-mostlyclean
1509         -rm -f $(addprefix $(objpfx),$(generated))
1510         -rm -f $(objpfx)*.d $(objpfx)*.dt
1511         -rm -fr $(addprefix $(objpfx),$(generated-dirs))
1512         -rm -f $(addprefix $(common-objpfx),$(common-generated))
1513         -rm -f $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
1514 \f
1515 # Produce a file `stubs' which contains `#define __stub_FUNCTION'
1516 # for each function which is a stub.
1517
1518 ifdef objpfx
1519 .PHONY: stubs # The parent Makefile calls this target.
1520 stubs: $(objpfx)stubs
1521 endif
1522 objs-for-stubs := $(foreach o,$(object-suffixes-for-libc),$(o-objects)) \
1523                   $(addprefix $(objpfx),$(extra-objs))
1524 $(objpfx)stubs: $(objs-for-stubs)
1525 ifneq (,$(strip $(objs-for-stubs)))
1526         (cd $(objpfx).; $(OBJDUMP) -h $(patsubst $(objpfx)%,%,$^)) | \
1527         $(AWK) '/\.gnu\.glibc-stub\./ { \
1528                   sub(/\.gnu\.glibc-stub\./, "", $$2); \
1529                   stubs[$$2] = 1; } \
1530                 END { for (s in stubs) print "#define __stub_" s }' > $@T
1531         mv -f $@T $@
1532 else
1533         > $@
1534 endif
1535 \f
1536 ifneq (,$(strip $(gpl2lgpl)))
1537 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
1538 # Snarf from the master source and frob the copying notice.
1539 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
1540         sed -f $^ > $@-tmp
1541 # So I don't edit them by mistake.
1542         chmod a-w $@-tmp
1543         mv -f $@-tmp $@
1544 endif
1545 endif
1546
1547 # Local Variables:
1548 # mode: makefile
1549 # End: