Makerules

   1 # Copyright (C) 1991-2012 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                                $(before-compile))
  94
  95 # Even before that, we need abi-versions.h which is generated right here.
  96 ifeq ($(versioning),yes)
  97 ifndef avoid-generated
  98 before-compile := $(common-objpfx)abi-versions.h $(before-compile)
  99 $(common-objpfx)abi-versions.h: $(..)scripts/abi-versions.awk \
 100                                 $(common-objpfx)Versions.all
 101         LC_ALL=C $(AWK) -v oldest_abi=$(oldest-abi) -f $^ > $@T
 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 endif # avoid-generated
 109 endif # $(versioning) = yes
 110
 111 ifndef avoid-generated
 112 before-compile := $(common-objpfx)libc-abis.h $(before-compile)
 113 $(common-objpfx)libc-abis.h: $(common-objpfx)libc-abis.stamp; @:
 114 $(common-objpfx)libc-abis.stamp: $(..)scripts/gen-libc-abis \
 115                              $(firstword $(wildcard $(sysdirs:=/libc-abis)) \
 116                                          $(..)libc-abis) \
 117                              $(..)Makerules
 118         $(SHELL) $< \
 119                  $(base-machine)-$(config-vendor)-$(config-os) \
 120                  < $(word 2,$^) > $(@:.stamp=.h)T
 121         $(move-if-change) $(@:.stamp=.h)T $(@:.stamp=.h)
 122         touch $@
 123 common-generated += $(common-objpfx)libc-abis.h
 124 endif # avoid-generated
 125
 126 # Make sure the subdirectory for object files gets created.
 127 ifdef objpfx
 128 ifeq (,$(wildcard $(objpfx).))
 129 before-compile += $(objpfx).
 130 $(objpfx).:
 131         $(make-target-directory)
 132 endif
 133 endif
 134
 135 # Remove existing files from `before-compile'.  Things are added there when
 136 # they must exist for dependency generation to work right, but once they
 137 # exist there is no further need for every single file to depend on them,
 138 # and those gratuitous dependencies result in many gratuitous
 139 # recompilations.
 140 before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
 141
 142 # Don't let any before-compile file be an intermediate and get removed.
 143 ifdef before-compile
 144 $(before-compile):
 145 endif
 146
 147 # We don't want $(common-objpfx) files to depend on miscellaneous stuff
 148 # in subdirs.
 149 ifdef subdir
 150 common-before-compile := $(filter-out $(objpfx)%,$(before-compile))
 151 else
 152 common-before-compile = $(before-compile)
 153 endif
 154
 155 ifndef subdir
 156 # If a makefile needs to do something conditional on something that
 157 # can only be figured out from headers, write a FOO.make.c input
 158 # file that uses cpp contructs and contains @@@ LINE @@@ for each LINE
 159 # to emit in the generated makefile, and use -include $(common-objpfx)FOO.make.
 160 #
 161 # We only generate these in the top-level makefile, to avoid any weirdness
 162 # from subdir-specific makefile tweaks creeping in on an update.
 163 $(common-objpfx)%.make: $(..)%.make.c $(..)Makerules $(common-before-compile)
 164         rm -f $@T $@.dT
 165         (echo '# Generated from $*.make.c by Makerules.'; \
 166          $(CC) $(CFLAGS) $(CPPFLAGS) -E -DASSEMBLER $< \
 167                -MD -MP -MT '$$(common-objpfx)$*.make' -MF $@.dT \
 168          | sed -n '/@@@/{s/@@@[  ]*\(.*\)@@@/\1/;s/[     ]*$$//p;}'; \
 169          echo 'common-generated += $(@F)'; \
 170          sed $(sed-remove-objpfx) $(sed-remove-dotdot) $@.dT; \
 171          rm -f $@.dT) > $@T
 172         mv -f $@T $@
 173 endif
 174
 175 ifdef subdir
 176 sed-remove-dotdot := -e 's@  *\.\.\/\([^        \]*\)@ $$(..)\1@g' \
 177                      -e 's@^\.\.\/\([^  \]*\)@$$(..)\1@g'
 178 else
 179 sed-remove-dotdot := -e 's@  *\([^      \/$$][^         \]*\)@ $$(..)\1@g' \
 180                      -e 's@^\([^        \/$$][^         \]*\)@$$(..)\1@g'
 181 endif
 182
 183
 184 ifdef gen-as-const-headers
 185 # Generating headers for assembly constants.
 186 # We need this defined early to get into before-compile before
 187 # it's used in sysd-rules, below.
 188 $(common-objpfx)%.h $(common-objpfx)%.h.d: $(..)scripts/gen-as-const.awk \
 189                                            %.sym $(common-before-compile)
 190         $(AWK) -f $< $(filter %.sym,$^) \
 191         | $(CC) -S -o $(@:.h.d=.h)T3 $(CFLAGS) $(CPPFLAGS) -x c - \
 192                 -MD -MP -MF $(@:.h=.h.d)T -MT '$(@:.h=.h.d) $(@:.h.d=.h)'
 193         sed -n 's/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*$$/#define \1 \2/p' \
 194                 $(@:.h.d=.h)T3 > $(@:.h.d=.h)T
 195         rm -f $(@:.h.d=.h)T3
 196         sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
 197             $(@:.h=.h.d)T > $(@:.h=.h.d)T2
 198         rm -f $(@:.h=.h.d)T
 199         mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d)
 200         mv -f $(@:.h.d=.h)T $(@:.h.d=.h)
 201 vpath %.sym $(sysdirs)
 202 before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 203
 204 tests += $(gen-as-const-headers:%.sym=test-as-const-%)
 205 generated += $(gen-as-const-headers:%.sym=test-as-const-%.c)
 206 $(objpfx)test-as-const-%.c: $(..)scripts/gen-as-const.awk $(..)Makerules \
 207                             %.sym $(common-objpfx)%.h
 208         ($(AWK) '{ sub(/^/, "asconst_", $$2); print; }' $(filter %.h,$^); \
 209          $(AWK) -v test=1 -f $< $(filter %.sym,$^); \
 210          echo '#include "$(..)test-skeleton.c"') > $@T
 211         mv -f $@T $@
 212 endif
 213 \f
 214 # Generate an ordered list of implicit rules which find the source files in
 215 # each sysdep directory.  The old method was to use vpath to search all the
 216 # sysdep directories.  However, that had the problem that a .S file in a
 217 # later directory would be chosen over a .c file in an earlier directory,
 218 # which does not preserve the desired sysdeps ordering behavior.
 219
 220 # System-dependent makefiles can put in `inhibit-sysdep-asm' wildcard
 221 # patterns matching sysdep directories whose assembly source files should
 222 # be suppressed.
 223 ifdef inhibit-sysdep-asm
 224 define check-inhibit-asm
 225 case $$sysdir in $(subst $(empty) ,|,$(inhibit-sysdep-asm))) asm= ;; esac;
 226 endef
 227 endif
 228
 229 -include $(common-objpfx)sysd-rules
 230 ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
 231 # The value of $(+sysdep_dirs) the sysd-rules was computed for
 232 # differs from the one we are using now.  So force a rebuild of sysd-rules.
 233 sysd-rules-force = FORCE
 234 FORCE:
 235 endif
 236 $(common-objpfx)sysd-rules: $(common-objpfx)config.make $(..)Makerules \
 237                             $(sysdep-makefiles) $(sysdep-makeconfigs) \
 238                             $(sysd-rules-force)
 239         -@rm -f $@T
 240         (echo 'sysd-rules-sysdirs := $(config-sysdirs)';                      \
 241          for dir in $(config-sysdirs); do                                     \
 242            case "$$dir" in                                                    \
 243            /*) ;;                                                             \
 244            *) dir="\$$(..)$$dir" ;;                                           \
 245            esac;                                                              \
 246            asm='.S';                                                          \
 247            $(check-inhibit-asm)                                               \
 248            for o in $(all-object-suffixes); do                                \
 249              set $(subst :, ,$(sysd-rules-patterns));                         \
 250              while [ $$# -ge 2 ]; do                                          \
 251                t=$$1; shift;                                                  \
 252                d=$$1; shift;                                                  \
 253                v=$${t%%%}; [ x"$$v" = x ] || v="\$$($${v}CPPFLAGS)";          \
 254                for s in $$asm .c; do                                          \
 255                  echo "\$$(objpfx)$$t$$o: $$dir/$$d$$s \$$(before-compile)";  \
 256                  echo " \$$(compile-command$$s) $$v";                         \
 257                done;                                                          \
 258              done;                                                            \
 259            done;                                                              \
 260            echo "\$$(inst_includedir)/%.h: $$dir/%.h \$$(+force)";            \
 261            echo "       \$$(do-install)";                                     \
 262          done;                                                                \
 263          echo 'sysd-rules-done = t') > $@T
 264         mv -f $@T $@
 265
 266 ifndef sysd-rules-done
 267 # Don't do deps until this exists, because it provides rules to make the deps.
 268 no_deps=t
 269 endif
 270
 271 define o-iterator-doit
 272 $(objpfx)%$o: %.S $(before-compile); $$(compile-command.S)
 273 endef
 274 object-suffixes-left := $(all-object-suffixes)
 275 include $(o-iterator)
 276
 277 define o-iterator-doit
 278 $(objpfx)%$o: %.c $(before-compile); $$(compile-command.c)
 279 endef
 280 object-suffixes-left := $(all-object-suffixes)
 281 include $(o-iterator)
 282
 283 define o-iterator-doit
 284 $(objpfx)%$o: %.cc $(before-compile); $$(compile-command.cc)
 285 endef
 286 object-suffixes-left := $(all-object-suffixes)
 287 include $(o-iterator)
 288
 289 # Omit the objpfx rules when building in the source tree, because
 290 # objpfx is empty and so these rules just override the ones above.
 291 ifdef objpfx
 292 # Define first rules to find the source files in $(objpfx).
 293 # Generated source files will end up there.
 294 define o-iterator-doit
 295 $(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S)
 296 endef
 297 object-suffixes-left := $(all-object-suffixes)
 298 include $(o-iterator)
 299
 300 define o-iterator-doit
 301 $(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
 302 endef
 303 object-suffixes-left := $(all-object-suffixes)
 304 include $(o-iterator)
 305 endif
 306
 307 # Generate version maps, but wait until sysdep-subdirs is known
 308 ifeq ($(sysd-sorted-done),t)
 309 ifeq ($(versioning),yes)
 310 -include $(common-objpfx)sysd-versions
 311 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
 312 common-generated += $(version-maps)
 313 postclean-generated += sysd-versions Versions.all abi-versions.h \
 314                        Versions.def.v.i Versions.def.v Versions.v.i Versions.v
 315
 316 ifndef avoid-generated
 317 ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
 318 sysd-versions-force = FORCE
 319 FORCE:
 320 endif
 321 # See %.v/%.v.i implicit rules in Makeconfig.
 322 $(common-objpfx)Versions.def.v.i: $(..)Versions.def \
 323                                   $(wildcard $(add-ons:%=$(..)%/Versions.def))
 324 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
 325                               $(common-objpfx)soversions.i \
 326                               $(common-objpfx)Versions.def.v
 327         { while read which lib version setname; do \
 328             test x"$$which" = xDEFAULT || continue; \
 329             test -z "$$setname" || echo "$$lib : $$setname"; \
 330           done < $(word 2,$^); \
 331           cat $(word 3,$^); \
 332         } | LC_ALL=C $(AWK) -f $< > $@T
 333         mv -f $@T $@
 334 # See %.v/%.v.i implicit rules in Makeconfig.
 335 $(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
 336                               $(wildcard $(sysdirs:%=%/Versions)) \
 337                               $(common-objpfx)abi-versions.h \
 338                               $(sysd-versions-force)
 339 $(common-objpfx)sysd-versions: $(common-objpfx)Versions.all \
 340                                $(common-objpfx)Versions.v \
 341                                $(..)scripts/versions.awk
 342         ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
 343           cat $(word 2,$^) \
 344           | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
 345                             -v move_if_change='$(move-if-change)' \
 346                             -f $(word 3,$^); \
 347         ) > $@T
 348         mv -f $@T $@
 349 endif # avoid-generated
 350 endif # $(versioning) = yes
 351 endif # sysd-sorted-done
 352
 353 # Generate .dT files as we compile.
 354 compile-mkdep-flags = -MD -MP -MF $@.dt -MT $@
 355 compile-command.S = $(compile.S) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 356 compile-command.c = $(compile.c) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 357 compile-command.cc = $(compile.cc) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 358
 359 # Like compile-mkdep-flags, but for use with $(BUILD_CC).  We don't want to
 360 # track system includes here, they may spuriously trigger an install rule,
 361 # and would cause the check-local-headers test to fail.
 362 native-compile-mkdep-flags = -MMD -MP -MF $@.dt -MT $@
 363
 364 # GCC can grok options after the file name, and it looks nicer that way.
 365 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
 366 compile.cc = $(CXX) $< -c $(CXXFLAGS) $(CPPFLAGS)
 367 compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \
 368                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 369 COMPILE.c = $(CC) -c $(CFLAGS) $(CPPFLAGS)
 370 COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \
 371                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 372
 373 # We need this for the output to go in the right place.  It will default to
 374 # empty if make was configured to work with a cc that can't grok -c and -o
 375 # together.  You can't compile the C library with such a compiler.
 376 OUTPUT_OPTION = -o $@
 377
 378 # This is the end of the pipeline for compiling generated C code.
 379 compile-stdin.c = $(COMPILE.c) -o $@ -x c - $(compile-mkdep-flags)
 380
 381 # We need the $(CFLAGS) to be in there to have the right predefines during
 382 # the dependency run for C sources.  But having it for assembly sources can
 383 # get the wrong predefines.
 384 S-CPPFLAGS = -DASSEMBLER $(asm-CPPFLAGS)
 385
 386 define +make-deps
 387 $(make-target-directory)
 388 $(+mkdep) $< $(if $(filter %.c,$<),$(CFLAGS)) \
 389              $(CPPFLAGS) $($(patsubst .%,%,$(suffix $(<F)))-CPPFLAGS) | sed -e\
 390 's,$(subst .,\.,$(@F:.d=.o)),$(foreach o,$(all-object-suffixes),$(@:.d=$o)) $@,' \
 391 $(sed-remove-objpfx) $(sed-remove-dotdot) > $(@:.d=.T)
 392 mv -f $(@:.d=.T) $@ $(generate-md5)
 393 endef
 394
 395 ifneq (,$(objpfx))
 396 # Continuation lines here are dangerous because they introduce spaces!
 397 define sed-remove-objpfx
 398 -e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
 399 -e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g'
 400 endef
 401 endif
 402 \f
 403 # Modify the list of routines we build for different targets
 404
 405 ifeq (yes,$(build-shared))
 406 ifndef libc.so-version
 407 # Undefine this because it can't work when we libc.so is unversioned.
 408 static-only-routines =
 409 endif
 410 endif
 411
 412 # Bounded pointer thunks are only built for *.ob
 413 elide-bp-thunks = $(addprefix $(bppfx),$(bp-thunks))
 414
 415 elide-routines.oS += $(filter-out $(static-only-routines),\
 416                                   $(routines) $(aux) $(sysdep_routines)) \
 417                      $(elide-bp-thunks)
 418 elide-routines.os += $(static-only-routines) $(elide-bp-thunks)
 419
 420 # If we have versioned code we don't need the old versions in any of the
 421 # static libraries.
 422 elide-routines.o  += $(shared-only-routines) $(elide-bp-thunks)
 423 elide-routines.op += $(shared-only-routines) $(elide-bp-thunks)
 424 elide-routines.og += $(shared-only-routines) $(elide-bp-thunks)
 425 elide-routines.ob += $(shared-only-routines)
 426 \f
 427 # Shared library building.
 428
 429 ifeq (yes,$(build-shared))
 430
 431 # Reference map file only when versioning is selected and a map file name
 432 # is given.
 433 ifeq ($(versioning),yes)
 434 map-file = $(firstword $($(@F:.so=-map)) \
 435                        $(addprefix $(common-objpfx), \
 436                                    $(filter $(@F:.so=.map),$(version-maps))))
 437 load-map-file = $(map-file:%=-Wl,--version-script=%)
 438 endif
 439
 440 # Pattern rule to build a shared object from an archive of PIC objects.
 441 # This must come after the installation rules so Make doesn't try to
 442 # build shared libraries in place from the installed *_pic.a files.
 443 # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
 444 # on other shared objects.
 445 lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(+interp)
 446         $(build-shlib)
 447
 448 define build-shlib-helper
 449 $(LINK.o) -shared $(static-libgcc) -Wl,-O1 $(sysdep-LDFLAGS) \
 450           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) $(config-LDFLAGS) \
 451           $(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \
 452           $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
 453           -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
 454           $(LDFLAGS.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
 455           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 456 endef
 457
 458 ifeq (yes,$(use-default-link))
 459 # If the linker is good enough, we can let it use its default linker script.
 460 shlib-lds =
 461 shlib-lds-flags =
 462 else
 463 # binutils only position loadable notes into the first page for binaries,
 464 # not for shared objects
 465 $(common-objpfx)shlib.lds: $(common-objpfx)config.make $(..)Makerules
 466         $(LINK.o) -shared -Wl,-O1 \
 467                   -nostdlib -nostartfiles \
 468                   $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS.so) \
 469                   -Wl,--verbose 2>&1 | \
 470           sed > $@T \
 471               -e '/^=========/,/^=========/!d;/^=========/d' \
 472               $(if $(filter yes,$(have-hash-style)), \
 473                    -e 's/^.*\.gnu\.hash[        ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 474                    -e '/^[      ]*\.hash[       ]*:.*$$/{h;d;}' \
 475                    -e '/DATA_SEGMENT_ALIGN/{H;g}' \
 476                 , \
 477                    -e 's/^.*\.hash[     ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 478                ) \
 479               -e 's/^.*\*(\.dynbss).*$$/& \
 480                  PROVIDE(__start___libc_freeres_ptrs = .); \
 481                  *(__libc_freeres_ptrs) \
 482                  PROVIDE(__stop___libc_freeres_ptrs = .);/'\
 483               -e 's@^.*\*(\.jcr).*$$@& \
 484                  PROVIDE(__start___libc_subfreeres = .);\
 485                  __libc_subfreeres : { *(__libc_subfreeres) }\
 486                  PROVIDE(__stop___libc_subfreeres = .);\
 487                  PROVIDE(__start___libc_atexit = .);\
 488                  __libc_atexit : { *(__libc_atexit) }\
 489                  PROVIDE(__stop___libc_atexit = .);\
 490                  PROVIDE(__start___libc_thread_subfreeres = .);\
 491                  __libc_thread_subfreeres : { *(__libc_thread_subfreeres) }\
 492                  PROVIDE(__stop___libc_thread_subfreeres = .);\
 493                  /DISCARD/ : { *(.gnu.glibc-stub.*) }@'
 494         test -s $@T
 495         mv -f $@T $@
 496 common-generated += shlib.lds
 497
 498 shlib-lds = $(common-objpfx)shlib.lds
 499 shlib-lds-flags = -T $(shlib-lds)
 500 endif
 501
 502 define build-shlib
 503 $(build-shlib-helper) -o $@ $(shlib-lds-flags) \
 504           $(csu-objpfx)abi-note.o $(build-shlib-objlist)
 505 endef
 506
 507 define build-module-helper
 508 $(LINK.o) -shared $(static-libgcc) $(sysdep-LDFLAGS) $(config-LDFLAGS) \
 509           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
 510           -B$(csu-objpfx) $(load-map-file) \
 511           $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
 512           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 513 endef
 514
 515 # This macro is similar to build-shlib but it does not define a soname
 516 # and it does not depend on the destination name to start with `lib'.
 517 # binutils only position loadable notes into the first page for binaries,
 518 # not for shared objects
 519 define build-module
 520 $(build-module-helper) -o $@ $(shlib-lds-flags) \
 521           $(csu-objpfx)abi-note.o $(build-module-objlist)
 522 endef
 523 define build-module-asneeded
 524 $(build-module-helper) -o $@ $(shlib-lds-flags) \
 525           $(csu-objpfx)abi-note.o \
 526           -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed
 527 endef
 528
 529 build-module-helper-objlist = \
 530         $(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\
 531                    $(filter-out %.lds $(map-file) $(+preinit) $(+postinit),$^))
 532
 533 build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so)
 534 build-shlib-objlist = $(build-module-helper-objlist) \
 535                       $(LDLIBS-$(@F:lib%.so=%).so)
 536
 537 # Don't try to use -lc when making libc.so itself.
 538 # Also omits crti.o and crtn.o, which we do not want
 539 # since we define our own `.init' section specially.
 540 LDFLAGS-c.so = -nostdlib -nostartfiles
 541 # But we still want to link libc.so against $(libc.so-gnulib).
 542 LDLIBS-c.so += $(libc.so-gnulib)
 543 # Give libc.so an entry point and make it directly runnable itself.
 544 LDFLAGS-c.so += -e __libc_main
 545 # If lazy relocation is disabled add the -z now flag.
 546 ifeq ($(bind-now),yes)
 547 LDFLAGS-c.so += -Wl,-z,now
 548 endif
 549 # Pre-link the objects of libc_pic.a so that we can locally resolve
 550 # COMMON symbols before we link against ld.so.  This is because ld.so
 551 # contains some of libc_pic.a already, which will prevent the COMMONs
 552 # from being allocated in libc.so, which introduces evil dependencies
 553 # between libc.so and ld.so, which can make it impossible to upgrade.
 554 $(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
 555         $(LINK.o) -nostdlib -nostartfiles -r -o $@ \
 556         $(LDFLAGS-c_pic.os) -Wl,-d $(whole-archive) $^ -o $@
 557
 558 ifeq (,$(strip $(shlib-lds-flags)))
 559 # Generate a list of -R options to excise .gnu.glibc-stub.* sections.
 560 $(common-objpfx)libc_pic.opts: $(common-objpfx)libc_pic.os
 561         $(OBJDUMP) -h $< | \
 562         $(AWK) '$$2 ~ /\.gnu\.glibc-stub\./ { print "-R", $$2 }' \
 563                 > $@T
 564         mv -f $@T $@
 565 # Apply those -R options.
 566 $(common-objpfx)libc_pic.os.clean: $(common-objpfx)libc_pic.opts \
 567                                    $(common-objpfx)libc_pic.os
 568         $(OBJCOPY) @$^ $@
 569 generated += libc_pic.opts libc_pic.os.clean
 570
 571 libc_pic_clean := .clean
 572 endif
 573
 574 # Use our own special initializer and finalizer files for libc.so.
 575 $(common-objpfx)libc.so: $(elfobjdir)/soinit.os \
 576                          $(common-objpfx)libc_pic.os$(libc_pic_clean) \
 577                          $(elfobjdir)/sofini.os \
 578                          $(elfobjdir)/interp.os $(elfobjdir)/ld.so \
 579                          $(shlib-lds)
 580         $(build-shlib)
 581 ifeq ($(versioning),yes)
 582 $(common-objpfx)libc.so: $(common-objpfx)libc.map
 583 endif
 584 common-generated += libc.so libc_pic.os
 585 ifdef libc.so-version
 586 $(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
 587         $(make-link)
 588 common-generated += libc.so$(libc.so-version)
 589 endif
 590 endif
 591 \f
 592 # Figure out the source filenames in this directory.
 593
 594 override sources := $(addsuffix .c,\
 595                         $(filter-out $(elided-routines),\
 596                             $(routines) $(aux) \
 597                             $(sysdep_routines)))
 598 sysdep_routines := $(sysdep_routines)
 599
 600 headers := $(headers) $(sysdep_headers)
 601
 602 # This is the list of all object files, gotten by
 603 # replacing every ".c" in `sources' with a ".o".
 604 # We also add bounded-pointer thunks, which are later
 605 # elided for all suffixes except for `.ob'.
 606 override objects := $(addprefix $(objpfx),$(sources:.c=.o) \
 607                       $(patsubst %,$(bppfx)%.o,\
 608                         $(filter $(routines) $(sysdep_routines),$(bp-thunks))))
 609
 610
 611 # The makefile may define $(extra-libs) with `libfoo libbar'
 612 # to build libfoo.a et al from the modules listed in $(libfoo-routines).
 613 ifdef extra-libs
 614 # extra-lib.mk is included once for each extra lib to define rules
 615 # to build it, and to add its objects to the various variables.
 616 # During its evaluation, $(lib) is set to the name of the library.
 617 extra-libs-left := $(extra-libs)
 618 include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
 619 endif
 620
 621
 622 # The makefile may define $(modules-names) to build additional modules.
 623 # These are built with $(build-module), except any in $(modules-names-nobuild).
 624 ifdef modules-names
 625 # extra-lib.mk is included once for each extra lib to define rules
 626 # to build it, and to add its objects to the various variables.
 627 # During its evaluation, $(lib) is set to the name of the library.
 628 extra-modules-left := $(modules-names)
 629 include $(patsubst %,$(..)extra-modules.mk,$(modules-names))
 630
 631 extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names))
 632 $(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \
 633                 $(objpfx)%.os $(shlib-lds) \
 634                 $(common-objpfx)libc.so $(common-objpfx)libc_nonshared.a
 635         $(build-module)
 636 endif
 637 \f
 638 +depfiles := $(sources:.c=.d) \
 639              $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \
 640              $(patsubst %.oS,%.d,$(filter %.oS,$(extra-objs))) \
 641              $(patsubst %.o,%.d,$(filter %.o,$(extra-test-objs:.os=.o))) \
 642              $(addsuffix .d,$(tests) $(xtests) $(test-srcs))
 643 ifeq ($(build-programs),yes)
 644 +depfiles += $(addsuffix .d,$(others) $(sysdep-others))
 645 endif
 646 +depfiles := $(addprefix $(objpfx),\
 647                          $(filter-out $(addsuffix .d,$(omit-deps)),\
 648                                       $(+depfiles)))
 649 all-dt-files := $(foreach o,$(object-suffixes-for-libc),$(+depfiles:.d=$o.dt))
 650 +depfiles := $(patsubst %.dt,%.d,$(wildcard $(all-dt-files))) \
 651              $(wildcard $(all-dt-files:.dt=.d))
 652
 653 # This is a funny rule in that it removes its input file.
 654 %.d: %.dt
 655         @sed $(sed-remove-objpfx) $< > $(@:.d=.T) && \
 656          mv -f $(@:.d=.T) $@ && \
 657          rm -f $<
 658
 659 # Avoid the .h.d files for any .sym files whose .h files don't exist yet.
 660 # They will be generated when they're needed, and trying too early won't work.
 661 +gen-as-const := $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 662 +depfiles += $(addsuffix .d,$(filter $(wildcard $(+gen-as-const)),\
 663                                                 $(+gen-as-const)))
 664
 665 ifdef +depfiles
 666 ifneq ($(no_deps),t)
 667 -include $(+depfiles)
 668 endif
 669 endif
 670 \f\f
 671 # Maximize efficiency by minimizing the number of rules.
 672 .SUFFIXES:      # Clear the suffix list.  We don't use suffix rules.
 673 # Don't define any builtin rules.
 674 MAKEFLAGS := $(MAKEFLAGS)r
 675
 676 # Generic rule for making directories.
 677 %/:
 678 # mkdir isn't smart enough to strip a trailing /.
 679 # We always require a mkdir which supports the -p option to avoid error
 680 # messages in case of races.
 681         mkdir -p $(@:%/=%)
 682 \f
 683 # Make sure that object files are not removed
 684 # when they are intermediates between sources and library members.
 685 .PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes))
 686
 687 # Make sure that the parent library archive is never removed.
 688 .PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 689 \f
 690 # Use the verbose option of ar and tar when not running silently.
 691 ifeq    "$(findstring s,$(MAKEFLAGS))" ""       # if not -s
 692 verbose := v
 693 else                                            # -s
 694 verbose :=
 695 endif                                           # not -s
 696
 697 ARFLAGS := r$(verbose)
 698 CREATE_ARFLAGS := cru$(verbose)
 699 \f
 700 # This makes all the object files in the parent library archive.
 701
 702 .PHONY: lib lib-noranlib
 703 lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 704 lib-noranlib: libobjs
 705
 706 # For object-suffix $o, the list of objects with that suffix.
 707 # Makefiles can define `elide-routines.so = foo' to leave foo.so out.
 708 o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
 709                                                        $(elide-routines$o)),\
 710                                             $(objects))) \
 711             $(addprefix $(objpfx),$(o-objects$o))
 712
 713 others: $(addprefix $(objpfx),$(install-lib))
 714
 715 ifndef objects
 716
 717 # Create the stamp$o files to keep the parent makefile happy.
 718 subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 719 $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o):
 720         $(make-target-directory)
 721         rm -f $@; > $@
 722 else
 723
 724 # Define explicit rules to update each $(objpfx)stamp.SUFFIX
 725 # timestamp file; these rules (one explicit rule is generated for each
 726 # object suffix) write a list of objects to update in the stamp file.
 727 # The parent will then actually add them all to the archive in the
 728 # archive rule, below.
 729 define o-iterator-doit
 730 $(objpfx)stamp$o: $(o-objects); $$(do-stamp)
 731 endef
 732 define do-stamp
 733 $(make-target-directory)
 734 echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T
 735 mv -f $@T $@
 736 endef
 737 object-suffixes-left := $(object-suffixes-for-libc)
 738 include $(o-iterator)
 739
 740 endif
 741
 742 # Now define explicit rules to build the library archives; these depend
 743 # on the stamp files built above.
 744 define o-iterator-doit
 745 $(common-objpfx)$(patsubst %,$(libtype$o),c): \
 746                 $(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib)
 747 endef
 748 define do-makelib
 749 cd $(common-objdir) && \
 750 $(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)`
 751 endef
 752 subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%)
 753 subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
 754 ifndef subdir
 755 $(subdirs-stamps): subdir_lib;
 756 endif
 757 object-suffixes-left = $(object-suffixes-for-libc)
 758 include $(o-iterator)
 759
 760
 761 # This makes all the object files.
 762 .PHONY: objects objs libobjs extra-objs
 763 objects objs: libobjs extra-objs
 764 libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 765 extra-objs: $(addprefix $(objpfx),$(extra-objs))
 766
 767 # Canned sequence for building an extra library archive.
 768 define build-extra-lib
 769 $(patsubst %/,cd % &&,$(objpfx)) \
 770 $(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \
 771       $(patsubst $(objpfx)%,%,$^)
 772 endef
 773 \f
 774 # Installation.
 775
 776 .PHONY: force-install
 777 force-install:
 778
 779 # $(install-lib) are installed from the object directory into $(libdir);
 780 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
 781 # unless they also appear in $(non-lib.a).  $(install-data) are installed as
 782 # they are into $(datadir).  $(headers) are installed as they are in
 783 # $(includedir).  $(install-bin), $(install-bin-script) and $(install-sbin)
 784 # are installed from the object directory into $(bindir), $(bindir) and
 785 # $(sbindir), respectively.  $(install-others) and $(install-others-programs)
 786 # are absolute path names of files to install; rules to install them are
 787 # defined elsewhere.
 788
 789 # The simple library name to install libc.a under.
 790 # This could be defined by a sysdep Makefile.
 791 ifndef libc-name
 792 libc-name := c
 793 endif
 794
 795 define do-install
 796 $(make-target-directory)
 797 $(INSTALL_DATA) $< $@
 798 endef
 799
 800 # Make the target directory if it doesn't exist, using the `mkinstalldirs'
 801 # script that does `mkdir -p' even if `mkdir' doesn't support that flag.
 802 define make-target-directory
 803 $(addprefix $(..)./scripts/mkinstalldirs ,\
 804             $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
 805 endef
 806
 807 # Any directory (parent or subdir) should install libc.a; this way
 808 # "make install" in a subdir is guaranteed to install everything it changes.
 809 installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
 810                              $(inst_libdir)/$(patsubst %,$(libtype$o),\
 811                                                      $(libprefix)$(libc-name)))
 812 install: $(installed-libcs)
 813 $(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
 814         $(make-target-directory)
 815         $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
 816
 817 define do-install-program
 818 $(make-target-directory)
 819 $(INSTALL_PROGRAM) $< $@.new
 820 mv -f $@.new $@
 821 endef
 822
 823 define do-install-script
 824 $(make-target-directory)
 825 $(INSTALL_SCRIPT) $< $@.new
 826 mv -f $@.new $@
 827 endef
 828
 829 install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
 830 install-lib := $(filter-out %.so %_pic.a,$(install-lib))
 831
 832 ifeq (yes,$(build-shared))
 833 # Find which .so's have versions.
 834 versioned := $(strip $(foreach so,$(install-lib.so),\
 835                                $(patsubst %,$(so),$($(so)-version))))
 836
 837 install-lib.so-versioned := $(filter $(versioned), $(install-lib.so))
 838 install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so))
 839
 840 # For versioned libraries, we install three files:
 841 #       $(inst_libdir)/libfoo.so        -- for linking, symlink or ld script
 842 #       $(inst_slibdir)/libfoo.so.NN    -- for loading by SONAME, symlink
 843 #       $(inst_slibdir)/libfoo-X.Y.Z.so -- the real shared object file
 844 lib-version := $(firstword $($(subdir)-version) $(version))
 845 install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \
 846                       $(foreach L,$(install-lib.so-versioned),\
 847                                 $(inst_libdir)/$L \
 848                                 $(inst_slibdir)/$(L:.so=)-$(lib-version).so \
 849                                 $(inst_slibdir)/$L$($L-version))
 850
 851 # Install all the unversioned shared libraries.
 852 $(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \
 853     $(objpfx)%.so $(+force)
 854         $(do-install-program)
 855
 856 ifneq ($(findstring -s,$(LN_S)),)
 857 define make-link
 858 rm -f $@.new
 859 $(SHELL) $(..)scripts/rellns-sh $< $@.new
 860 mv -f $@.new $@
 861 endef
 862 else
 863 # If we have no symbolic links don't bother with rellns-sh.
 864 define make-link
 865 rm -f $@.new
 866 $(LN_S) $< $@.new
 867 mv -f $@.new $@
 868 endef
 869 endif
 870
 871 ifeq (yes,$(build-shared))
 872 ifeq (no,$(cross-compiling))
 873 symbolic-link-prog := $(common-objpfx)elf/sln
 874 symbolic-link-list := $(common-objpfx)elf/symlink.list
 875 define make-shlib-link
 876 echo $(<F) $@ >> $(symbolic-link-list)
 877 endef
 878 else # cross-compiling
 879 # We need a definition that can be used by elf/Makefile's install rules.
 880 symbolic-link-prog = $(LN_S)
 881 endif
 882 endif
 883 ifndef make-shlib-link
 884 define make-shlib-link
 885 rm -f $@
 886 $(LN_S) $(<F) $@
 887 endef
 888 endif
 889
 890 ifdef libc.so-version
 891 # For a library specified to be version N, install three files:
 892 # libc.so       ->      libc.so.N       (e.g. libc.so.6)
 893 # libc.so.6     ->      libc-VERSION.so (e.g. libc-1.10.so)
 894
 895 $(inst_slibdir)/libc.so$(libc.so-version): $(inst_slibdir)/libc-$(version).so \
 896                                            $(+force)
 897         $(make-shlib-link)
 898 $(inst_slibdir)/libc-$(version).so: $(common-objpfx)libc.so $(+force)
 899         $(do-install-program)
 900 install: $(inst_slibdir)/libc.so$(libc.so-version)
 901
 902 # This fragment of linker script gives the OUTPUT_FORMAT statement
 903 # for the configuration we are building.  We put this statement into
 904 # the linker scripts we install for -lc et al so that they will not be
 905 # used by a link for a different format on a multi-architecture system.
 906 $(common-objpfx)format.lds: $(..)scripts/output-format.sed \
 907                             $(common-objpfx)config.make \
 908                             $(common-objpfx)config.h $(..)Makerules
 909 ifneq (unknown,$(output-format))
 910         echo > $@.new 'OUTPUT_FORMAT($(output-format))'
 911 else
 912         $(LINK.o) -shared $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS.so) \
 913                   -x c /dev/null -o $@.so -Wl,--verbose -v 2>&1 \
 914         | sed -n -f $< > $@.new
 915         test -s $@.new
 916         rm -f $@.so
 917 endif
 918         mv -f $@.new $@
 919 common-generated += format.lds
 920
 921 ifndef subdir
 922 # What we install as libc.so for programs to link against is in fact a
 923 # link script.  It contains references for the various libraries we need.
 924 # The libc.so object is not complete since some functions are only defined
 925 # in libc_nonshared.a.
 926 # We need to use absolute paths since otherwise local copies (if they exist)
 927 # of the files are taken by the linker.
 928 install: $(inst_libdir)/libc.so
 929 $(inst_libdir)/libc.so: $(common-objpfx)format.lds \
 930                         $(common-objpfx)libc.so$(libc.so-version) \
 931                         $(inst_libdir)/$(patsubst %,$(libtype.oS),\
 932                                                   $(libprefix)$(libc-name)) \
 933                         $(+force)
 934         (echo '/* GNU ld script';\
 935          echo '   Use the shared library, but some functions are only in';\
 936          echo '   the static library, so try that secondarily.  */';\
 937          cat $<; \
 938          echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \
 939               '$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\
 940               ' AS_NEEDED (' $(slibdir)/$(rtld-installed-name) ') )' \
 941         ) > $@.new
 942         mv -f $@.new $@
 943
 944 endif
 945
 946 else
 947 install: $(inst_slibdir)/libc.so
 948 $(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force)
 949         $(do-install-program)
 950 endif
 951
 952 ifneq (,$(versioned))
 953 # Produce three sets of rules as above for all the smaller versioned libraries.
 954
 955 define o-iterator-doit
 956 $(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link)
 957 endef
 958 object-suffixes-left := $(filter-out $(install-lib-ldscripts),$(versioned))
 959 ifneq (,$(object-suffixes-left))
 960 include $(o-iterator)
 961 endif
 962
 963 # Make symlinks in the build directory, because the versioned names might
 964 # be referenced by a DT_NEEDED in another library.
 965 define o-iterator-doit
 966 $(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
 967 endef
 968 object-suffixes-left := $(versioned)
 969 include $(o-iterator)
 970
 971 generated += $(foreach o,$(versioned),$o$($o-version))
 972
 973 ifeq (,$($(subdir)-version))
 974 define o-iterator-doit
 975 $(inst_slibdir)/$o$($o-version): $(inst_slibdir)/$(o:.so=)-$(version).so \
 976                                  $(+force);
 977         $$(make-shlib-link)
 978 endef
 979 object-suffixes-left := $(versioned)
 980 include $(o-iterator)
 981
 982 define o-iterator-doit
 983 $(inst_slibdir)/$(o:.so=)-$(version).so: $(objpfx)$o $(+force);
 984         $$(do-install-program)
 985 endef
 986 object-suffixes-left := $(versioned)
 987 include $(o-iterator)
 988 else
 989 define o-iterator-doit
 990 $(inst_slibdir)/$o$($o-version): \
 991   $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so $(+force);
 992         $$(make-shlib-link)
 993 endef
 994 object-suffixes-left := $(versioned)
 995 include $(o-iterator)
 996
 997 define o-iterator-doit
 998 $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so: $(objpfx)$o $(+force);
 999         $$(do-install-program)
1000 endef
1001 object-suffixes-left := $(versioned)
1002 include $(o-iterator)
1003 endif
1004 endif
1005
1006 define do-install-so
1007 $(do-install-program)
1008 $(patsubst %,ln -s -f $(@F) $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
1009            $(filter-out %.so,$@))
1010 endef
1011
1012 so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
1013 $(foreach v,$(so-versions),\
1014           $(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \
1015                                                $(+force)
1016         $(do-install-so)
1017 $(foreach v,$(so-versions),\
1018           $(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force)
1019         $(do-install-so)
1020 endif
1021
1022 ifdef install-bin
1023 $(addprefix $(inst_bindir)/,$(install-bin)): \
1024     $(inst_bindir)/%: $(objpfx)% $(+force)
1025         $(do-install-program)
1026 endif
1027 ifdef install-bin-script
1028 $(addprefix $(inst_bindir)/,$(install-bin-script)): \
1029     $(inst_bindir)/%: $(objpfx)% $(+force)
1030         $(do-install-script)
1031 endif
1032 ifdef install-rootsbin
1033 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \
1034    $(inst_rootsbindir)/%: $(objpfx)% $(+force)
1035         $(do-install-program)
1036 endif
1037 ifdef install-sbin
1038 $(addprefix $(inst_sbindir)/,$(install-sbin)): \
1039     $(inst_sbindir)/%: $(objpfx)% $(+force)
1040         $(do-install-program)
1041 endif
1042 ifdef install-lib
1043 install-lib.a := $(filter lib%.a,$(install-lib))
1044 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
1045 ifdef install-lib-non.a
1046 $(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
1047   $(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force)
1048         $(do-install)
1049 endif
1050 ifdef install-lib.a
1051 $(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \
1052   $(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force)
1053         $(do-install)
1054 endif
1055 endif
1056 ifdef install-data
1057 $(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force)
1058         $(do-install)
1059 endif
1060 headers := $(strip $(headers))
1061 ifdef headers
1062 # This implicit rule installs headers from the source directory.
1063 # It may be ignored in preference to rules from sysd-rules to find
1064 # headers in the sysdeps tree.
1065 $(inst_includedir)/%.h: $(objpfx)%.h $(+force)
1066         $(do-install)
1067 $(inst_includedir)/%.h: $(common-objpfx)%.h $(+force)
1068         $(do-install)
1069 $(inst_includedir)/%.h: %.h $(+force)
1070         $(do-install)
1071 $(inst_includedir)/%.h: $(..)include/%.h $(+force)
1072         $(do-install)
1073 headers-nonh := $(filter-out %.h,$(headers))
1074 ifdef headers-nonh
1075 $(addprefix $(inst_includedir)/,$(headers-nonh)): $(inst_includedir)/%: \
1076                                                  % $(+force)
1077         $(do-install)
1078 endif   # headers-nonh
1079 endif   # headers
1080
1081 .PHONY: install-bin-nosubdir install-bin-script-nosubdir \
1082         install-rootsbin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
1083         install-data-nosubdir install-headers-nosubdir
1084 install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin))
1085 install-bin-script-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin-script))
1086 install-rootsbin-nosubdir: \
1087         $(addprefix $(inst_rootsbindir)/,$(install-rootsbin))
1088 install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin))
1089 install-lib-nosubdir: $(addprefix $(inst_libdir)/,\
1090                        $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
1091                        $(addprefix $(libprefix),$(install-lib-non.a)))
1092 install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data))
1093 install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers))
1094 install-others-nosubdir: $(install-others)
1095 install-others-programs-nosubdir: $(install-others-programs)
1096
1097 # We need all the `-nosubdir' targets so that `install' in the parent
1098 # doesn't depend on several things which each iterate over the subdirs.
1099 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
1100 # subroutine.  Then in the parent `install-FOO' also causes subdir makes.
1101 install-%:: install-%-nosubdir ;
1102
1103 .PHONY: install install-no-libc.a-nosubdir
1104 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir \
1105                             install-lib-nosubdir install-others-nosubdir
1106 ifeq ($(build-programs),yes)
1107 install-no-libc.a-nosubdir: install-bin-nosubdir install-bin-script-nosubdir \
1108                             install-rootsbin-nosubdir install-sbin-nosubdir \
1109                             install-others-programs-nosubdir
1110 endif
1111 install: install-no-libc.a-nosubdir
1112 \f
1113 # Command to compile $< using the native libraries.
1114 define native-compile
1115 $(make-target-directory)
1116 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
1117             $< $(OUTPUT_OPTION) $(BUILD_LDFLAGS)
1118 endef
1119
1120 # We always want to use configuration definitions.
1121 ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) -D_GNU_SOURCE \
1122                    -DIS_IN_build -include $(common-objpfx)config.h
1123
1124 # Support the GNU standard name for this target.
1125 .PHONY: check
1126 check: tests
1127 # Special target to run tests which cannot be run unconditionally.
1128 # Maintainers should use this target.
1129 .PHONY: xcheck
1130 xcheck: xtests
1131
1132 all-nonlib = $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) $(others))
1133 ifneq (,$(all-nonlib))
1134 cpp-srcs-left = $(all-nonlib:=.c) $(all-nonlib:=.cc)
1135 lib := nonlib
1136 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
1137 endif
1138
1139 # The include magic above causes those files to use this variable for flags.
1140 CPPFLAGS-nonlib = -DNOT_IN_libc=1
1141
1142
1143 ifeq ($(versioning),yes)
1144 # Generate normalized lists of symbols, versions, and data sizes.
1145 # This is handy for checking against existing library binaries.
1146
1147 %.symlist: $(..)scripts/abilist.awk %.dynsym
1148         LC_ALL=C $(AWK) -f $^ > $@T
1149         mv -f $@T $@
1150
1151 %.dynsym: %.so
1152         LC_ALL=C $(OBJDUMP) --dynamic-syms $< > $@T
1153         mv -f $@T $@
1154
1155 vpath %.abilist $(+sysdep_dirs)
1156
1157 # The .PRECIOUS rule prevents the files built by an implicit rule whose
1158 # target pattern is %.symlist from being considered "intermediate files"
1159 # and automatically removed.  We only want these files to be removed by
1160 # 'make clean', which is handled by the 'generated' variable.
1161 .PRECIOUS: %.symlist
1162 generated += $(extra-libs:=.symlist)
1163
1164 check-abi-%: $(common-objpfx)config.make %.abilist $(objpfx)%.symlist
1165         $(check-abi)
1166 check-abi-%: $(common-objpfx)config.make %.abilist $(common-objpfx)%.symlist
1167         $(check-abi)
1168 define check-abi
1169         diff -p -U 0 $(filter %.abilist,$^) $(filter %.symlist,$^)
1170 endef
1171
1172 update-abi-%: $(objpfx)%.symlist %.abilist
1173         $(update-abi)
1174 update-abi-%: $(common-objpfx)%.symlist %.abilist
1175         $(update-abi)
1176 define update-abi
1177 @if cmp -s $^ 2> /dev/null; \
1178  then \
1179       echo '+++ $(filter %.abilist,$^) is unchanged'; \
1180  else cp -f $^; \
1181       echo '*** Now check $(filter %.abilist,$^) changes for correctness ***'; \
1182  fi
1183 endef
1184
1185 .PHONY: update-abi check-abi
1186 update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned))
1187 check-abi: $(patsubst %.so,check-abi-%,$(install-lib.so-versioned))
1188 ifdef subdir
1189 subdir_check-abi: check-abi
1190 subdir_update-abi: update-abi
1191 else
1192 check-abi: subdir_check-abi
1193 update-abi: subdir_update-abi
1194 endif
1195
1196 ifeq ($(subdir),elf)
1197 check-abi: check-abi-libc
1198 update-abi: update-abi-libc
1199 common-generated += libc.symlist
1200 endif
1201
1202 ifeq ($(build-shared),yes)
1203 ifdef subdir
1204 tests: check-abi
1205 endif
1206 endif
1207
1208 endif
1209
1210 # These will have been set by sysdeps/posix/Makefile.
1211 L_tmpnam  ?= 1
1212 TMP_MAX   ?= 0
1213 L_ctermid ?= 1
1214 L_cuserid ?= 1
1215
1216 stdio_lim = $(common-objpfx)bits/stdio_lim.h
1217
1218 $(stdio_lim:lim.h=%.h) $(stdio_lim:lim.h=%.d): $(stdio_lim:lim.h=%.st); @:
1219 $(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \
1220                    $(common-objpfx)config.make
1221         $(make-target-directory)
1222         { echo '#include "$(..)posix/bits/posix1_lim.h"';               \
1223           echo '#define _LIBC 1';                                       \
1224           echo '#include "$(..)misc/sys/uio.h"'; } |                    \
1225         $(CC) -E -dM -MD -MP -MF $(@:st=dT) -MT '$(@:st=h) $(@:st=d)'   \
1226               $(CPPUNDEFS) $(+includes) -xc - -o $(@:st=hT)
1227         sed $(sed-remove-objpfx) $(sed-remove-dotdot)                   \
1228             $(@:st=dT) > $(@:st=dt)
1229         mv -f $(@:st=dt) $(@:st=d)
1230         fopen_max=`sed -n 's/^#define OPEN_MAX //1p' $(@:st=hT)`;       \
1231         filename_max=`sed -n 's/^#define PATH_MAX //1p' $(@:st=hT)`;    \
1232         iov_max=`sed -n 's/^#define UIO_MAXIOV //p' $(@:st=hT)`;        \
1233         fopen_max=$${fopen_max:-16};                                    \
1234         filename_max=$${filename_max:-1024};                            \
1235         if [ -z "$$iov_max" ]; then                                     \
1236           define_iov_max="# undef IOV_MAX";                             \
1237         else                                                            \
1238           define_iov_max="# define IOV_MAX $$iov_max";                  \
1239         fi;                                                             \
1240         sed -e "s/@FOPEN_MAX@/$$fopen_max/"                             \
1241             -e "s/@FILENAME_MAX@/$$filename_max/"                       \
1242             -e "s/@L_tmpnam@/$(L_tmpnam)/"                              \
1243             -e "s/@TMP_MAX@/$(TMP_MAX)/"                                \
1244             -e "s/@L_ctermid@/$(L_ctermid)/"                            \
1245             -e "s/@L_cuserid@/$(L_cuserid)/"                            \
1246             -e "s/@define_IOV_MAX@/$$define_iov_max/"                   \
1247             $< > $(@:st=h.new)
1248         $(move-if-change) $(@:st=h.new) $(@:st=h)
1249 # Remove these last so that they can be examined if something went wrong.
1250         rm -f $(@:st=hT) $(@:st=dT) $(@:st=dt)
1251         touch $@
1252 # Get dependencies.
1253 ifndef no_deps
1254 -include $(stdio_lim:h=d)
1255 endif
1256 common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st
1257 \f
1258 FORCE:
1259
1260 .PHONY: echo-headers
1261 echo-headers:
1262         @echo $(headers)
1263
1264 %.bz2: %; bzip2 -9vk $<
1265 %.gz: %; gzip -9vnc $< > $@.new && mv -f $@.new $@
1266 %.xz: %; xz -9evk $<
1267 \f
1268 # Common cleaning targets.
1269
1270 .PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean
1271 clean: common-clean
1272 mostlyclean: common-mostlyclean
1273
1274 do-tests-clean:
1275         -rm -f $(addprefix $(objpfx),$(addsuffix .out,$(tests) $(xtests) \
1276                                                       $(test-srcs)) \
1277                                      $(addsuffix -bp.out,$(tests) $(xtests) \
1278                                                          $(test-srcs)))
1279
1280 # Remove the object files.
1281 common-mostlyclean:
1282         -rm -f $(addprefix $(objpfx),$(tests) $(xtests) $(test-srcs) \
1283                                      $(others) $(sysdep-others) stubs \
1284                                      $(addsuffix .o,$(tests) $(xtests) \
1285                                                     $(test-srcs) $(others) \
1286                                                     $(sysdep-others)) \
1287                                      $(addsuffix -bp,$(tests) $(xtests) \
1288                                                      $(test-srcs)) \
1289                                      $(addsuffix .out,$(tests) $(xtests) \
1290                                                       $(test-srcs)) \
1291                                      $(addsuffix -bp.out,$(tests) $(xtests) \
1292                                                          $(test-srcs)))
1293         -rm -f $(addprefix $(objpfx),$(extra-objs) $(extra-test-objs) \
1294                                      $(install-lib) $(install-lib.so) \
1295                                      $(install-lib.so:%.so=%_pic.a))
1296         -rm -f core
1297         -rm -f $(objpfx)rtld-*.os
1298         $(rmobjs)
1299 define rmobjs
1300 $(foreach o,$(object-suffixes-for-libc),
1301 -rm -f $(objpfx)stamp$o $(o-objects))
1302 endef
1303
1304 # Also remove the dependencies and generated source files.
1305 common-clean: common-mostlyclean
1306         -rm -f $(addprefix $(objpfx),$(generated))
1307         -rm -f $(objpfx)*.d $(objpfx)*.dt
1308         -rm -fr $(addprefix $(objpfx),$(generated-dirs))
1309         -rm -f $(addprefix $(common-objpfx),$(common-generated))
1310         -rm -f $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
1311 \f
1312 # Produce a file `stubs' which contains `#define __stub_FUNCTION'
1313 # for each function which is a stub.
1314
1315 ifdef objpfx
1316 .PHONY: stubs # The parent Makefile calls this target.
1317 stubs: $(objpfx)stubs
1318 endif
1319 objs-for-stubs := $(foreach o,$(object-suffixes-for-libc),$(o-objects)) \
1320                   $(addprefix $(objpfx),$(extra-objs))
1321 $(objpfx)stubs: $(objs-for-stubs)
1322 ifneq (,$(strip $(objs-for-stubs)))
1323         (cd $(objpfx).; $(OBJDUMP) -h $(patsubst $(objpfx)%,%,$^)) | \
1324         $(AWK) '/\.gnu\.glibc-stub\./ { \
1325                   sub(/\.gnu\.glibc-stub\./, "", $$2); \
1326                   stubs[$$2] = 1; } \
1327                 END { for (s in stubs) print "#define __stub_" s }' > $@T
1328         mv -f $@T $@
1329 else
1330         > $@
1331 endif
1332 \f
1333 ifneq (,$(strip $(gpl2lgpl)))
1334 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
1335 # Snarf from the master source and frob the copying notice.
1336 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
1337         sed -f $^ > $@-tmp
1338 # So I don't edit them by mistake.
1339         chmod a-w $@-tmp
1340         mv -f $@-tmp $@
1341 endif
1342 endif
1343
1344 # Local Variables:
1345 # mode: makefile
1346 # End: