Makerules

   1 # Copyright (C) 1991-2010, 2011 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, write to the Free
  16 # Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17 # 02111-1307 USA.
  18
  19 #
  20 #       Common rules for making the GNU C library.  This file is included
  21 #       by the top-level Makefile and by all subdirectory makefiles
  22 #       (through Rules).
  23 #
  24 ifneq (,)
  25 This makefile requires GNU Make.
  26 endif
  27
  28 REQUIRED_MAKE_VERSION = 3.74
  29 REAL_MAKE_VERSION = $(firstword $(MAKE_VERSION))
  30
  31 ifneq ($(REQUIRED_MAKE_VERSION), \
  32        $(firstword $(sort $(REAL_MAKE_VERSION) $(REQUIRED_MAKE_VERSION))))
  33 Wrong GNU Make version.  See above for the version needed.
  34 endif
  35
  36
  37 ifdef   subdir
  38 ..      := ../
  39 endif   # subdir
  40
  41 # If `sources' was defined by the parent makefile, undefine it so
  42 # we will later get it from wildcard search in this directory.
  43 ifneq   "$(findstring env,$(origin sources))" ""
  44 sources :=
  45 endif
  46
  47 oPATH := $(PATH)
  48 PATH := this definition should take precedence over $(oPATH)
  49 ifeq ($(PATH),$(oPATH))
  50 You must not use the -e flag when building the GNU C library.
  51 else
  52 PATH := $(oPATH)
  53 endif
  54 \f
  55 ifndef +included-Makeconfig
  56 include $(..)Makeconfig
  57 endif
  58
  59 # This variable is used in ``include $(o-iterator)'' after defining
  60 # $(o-iterator-doit) to produce some desired rule using $o for the object
  61 # suffix, and setting $(object-suffixes-left) to $(object-suffixes); a copy
  62 # is produced for each object suffix in use.
  63 o-iterator = $(patsubst %,$(..)o-iterator.mk,$(object-suffixes-left))
  64 \f
  65 # Include any system-specific makefiles.
  66
  67 # This is here so things in sysdep Makefiles can easily depend on foo.h as
  68 # appropriate and not worry about where foo.h comes from, which may be
  69 # system dependent and not known by that Makefile.
  70 vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
  71                                       $(+sysdep_dirs) $(..)))
  72
  73 # The same is true for RPC source files.
  74 vpath %.x $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
  75                                       $(+sysdep_dirs) $(..)))
  76
  77 # Some sysdep makefiles use this to distinguish being included here from
  78 # being included individually by a subdir makefile (hurd/Makefile needs this).
  79 in-Makerules := yes
  80
  81 sysdep-makefiles := $(wildcard $(sysdirs:=/Makefile))
  82 ifneq (,$(sysdep-makefiles))
  83 include $(sysdep-makefiles)
  84 endif
  85
  86
  87 # Reorder before-compile so that mach things come first, and hurd things
  88 # second, before all else.  The mach and hurd subdirectories have many
  89 # generated header files which the much of rest of the library depends on,
  90 # so it is best to build them first (and mach before hurd, at that).
  91 before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\
  92                            $(before-compile)) \
  93                   $(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
  94                                $(before-compile))
  95
  96 # Even before that, we need abi-versions.h which is generated right here.
  97 ifeq ($(versioning),yes)
  98 ifndef avoid-generated
  99 before-compile := $(common-objpfx)abi-versions.h $(before-compile)
 100 $(common-objpfx)abi-versions.h: $(..)scripts/abi-versions.awk \
 101                                 $(common-objpfx)Versions.all
 102         LC_ALL=C $(AWK) -v oldest_abi=$(oldest-abi) -f $^ > $@T
 103         mv -f $@T $@
 104
 105 $(common-objpfx)%.latest: $(common-objpfx)abi-versions.h
 106         sed -n '/ VERSION_$*_/{s/^.*_\([A-Z0-9_]*\).*$$/\1/;h;};$${g;p;}' \
 107             $(common-objpfx)abi-versions.h > $@T
 108         mv -f $@T $@
 109 endif # avoid-generated
 110 endif # $(versioning) = yes
 111
 112 ifndef avoid-generated
 113 before-compile := $(common-objpfx)libc-abis.h $(before-compile)
 114 $(common-objpfx)libc-abis.h: $(common-objpfx)libc-abis.stamp; @:
 115 $(common-objpfx)libc-abis.stamp: $(..)scripts/gen-libc-abis \
 116                              $(firstword $(wildcard $(sysdirs:=/libc-abis)) \
 117                                          $(..)libc-abis) \
 118                              $(..)Makerules
 119         $(SHELL) $< \
 120                  $(base-machine)-$(config-vendor)-$(config-os) \
 121                  < $(word 2,$^) > $(@:.stamp=.h)T
 122         $(move-if-change) $(@:.stamp=.h)T $(@:.stamp=.h)
 123         touch $@
 124 common-generated += $(common-objpfx)libc-abis.h
 125 endif # avoid-generated
 126
 127 # Make sure the subdirectory for object files gets created.
 128 ifdef objpfx
 129 ifeq (,$(wildcard $(objpfx).))
 130 before-compile += $(objpfx).
 131 $(objpfx).:
 132         $(make-target-directory)
 133 endif
 134 endif
 135
 136 # Remove existing files from `before-compile'.  Things are added there when
 137 # they must exist for dependency generation to work right, but once they
 138 # exist there is no further need for every single file to depend on them,
 139 # and those gratuitous dependencies result in many gratuitous
 140 # recompilations.
 141 before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
 142
 143 # Don't let any before-compile file be an intermediate and get removed.
 144 ifdef before-compile
 145 $(before-compile):
 146 endif
 147
 148 # We don't want $(common-objpfx) files to depend on miscellaneous stuff
 149 # in subdirs.
 150 ifdef subdir
 151 common-before-compile := $(filter-out $(objpfx)%,$(before-compile))
 152 else
 153 common-before-compile = $(before-compile)
 154 endif
 155
 156 ifndef subdir
 157 # If a makefile needs to do something conditional on something that
 158 # can only be figured out from headers, write a FOO.make.c input
 159 # file that uses cpp contructs and contains @@@ LINE @@@ for each LINE
 160 # to emit in the generated makefile, and use -include $(common-objpfx)FOO.make.
 161 #
 162 # We only generate these in the top-level makefile, to avoid any weirdness
 163 # from subdir-specific makefile tweaks creeping in on an update.
 164 $(common-objpfx)%.make: $(..)%.make.c $(..)Makerules $(common-before-compile)
 165         rm -f $@T $@.dT
 166         (echo '# Generated from $*.make.c by Makerules.'; \
 167          $(CC) $(CFLAGS) $(CPPFLAGS) -E -DASSEMBLER $< \
 168                -MD -MP -MT '$$(common-objpfx)$*.make' -MF $@.dT \
 169          | sed -n '/@@@/{s/@@@[  ]*\(.*\)@@@/\1/;s/[     ]*$$//p;}'; \
 170          echo 'common-generated += $(@F)'; \
 171          sed $(sed-remove-objpfx) $(sed-remove-dotdot) $@.dT; \
 172          rm -f $@.dT) > $@T
 173         mv -f $@T $@
 174 endif
 175
 176 ifdef subdir
 177 sed-remove-dotdot := -e 's@  *\.\.\/\([^        \]*\)@ $$(..)\1@g' \
 178                      -e 's@^\.\.\/\([^  \]*\)@$$(..)\1@g'
 179 else
 180 sed-remove-dotdot := -e 's@  *\([^      \/$$][^         \]*\)@ $$(..)\1@g' \
 181                      -e 's@^\([^        \/$$][^         \]*\)@$$(..)\1@g'
 182 endif
 183
 184
 185 ifdef gen-as-const-headers
 186 # Generating headers for assembly constants.
 187 # We need this defined early to get into before-compile before
 188 # it's used in sysd-rules, below.
 189 $(common-objpfx)%.h $(common-objpfx)%.h.d: $(..)scripts/gen-as-const.awk \
 190                                            %.sym $(common-before-compile)
 191         $(AWK) -f $< $(filter %.sym,$^) \
 192         | $(CC) -S -o $(@:.h.d=.h)T3 $(CFLAGS) $(CPPFLAGS) -x c - \
 193                 -MD -MP -MF $(@:.h=.h.d)T -MT '$(@:.h=.h.d) $(@:.h.d=.h)'
 194         sed -n 's/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*$$/#define \1 \2/p' \
 195                 $(@:.h.d=.h)T3 > $(@:.h.d=.h)T
 196         rm -f $(@:.h.d=.h)T3
 197         sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
 198             $(@:.h=.h.d)T > $(@:.h=.h.d)T2
 199         rm -f $(@:.h=.h.d)T
 200         mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d)
 201         mv -f $(@:.h.d=.h)T $(@:.h.d=.h)
 202 vpath %.sym $(sysdirs)
 203 before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 204
 205 tests += $(gen-as-const-headers:%.sym=test-as-const-%)
 206 generated += $(gen-as-const-headers:%.sym=test-as-const-%.c)
 207 $(objpfx)test-as-const-%.c: $(..)scripts/gen-as-const.awk $(..)Makerules \
 208                             %.sym $(common-objpfx)%.h
 209         ($(AWK) '{ sub(/^/, "asconst_", $$2); print; }' $(filter %.h,$^); \
 210          $(AWK) -v test=1 -f $< $(filter %.sym,$^); \
 211          echo '#include "$(..)test-skeleton.c"') > $@T
 212         mv -f $@T $@
 213 endif
 214 \f
 215 # Generate an ordered list of implicit rules which find the source files in
 216 # each sysdep directory.  The old method was to use vpath to search all the
 217 # sysdep directories.  However, that had the problem that a .S file in a
 218 # later directory would be chosen over a .c file in an earlier directory,
 219 # which does not preserve the desired sysdeps ordering behavior.
 220
 221 # System-dependent makefiles can put in `inhibit-sysdep-asm' wildcard
 222 # patterns matching sysdep directories whose assembly source files should
 223 # be suppressed.
 224 ifdef inhibit-sysdep-asm
 225 define check-inhibit-asm
 226 case $$sysdir in $(subst $(empty) ,|,$(inhibit-sysdep-asm))) asm= ;; esac;
 227 endef
 228 endif
 229
 230 -include $(common-objpfx)sysd-rules
 231 ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
 232 # The value of $(+sysdep_dirs) the sysd-rules was computed for
 233 # differs from the one we are using now.  So force a rebuild of sysd-rules.
 234 sysd-rules-force = FORCE
 235 FORCE:
 236 endif
 237 $(common-objpfx)sysd-rules: $(common-objpfx)config.make $(..)Makerules \
 238                             $(sysdep-makefiles) $(sysdep-makeconfigs) \
 239                             $(sysd-rules-force)
 240         -@rm -f $@T
 241         (echo 'sysd-rules-sysdirs := $(config-sysdirs)';                      \
 242          for dir in $(config-sysdirs); do                                     \
 243            case "$$dir" in                                                    \
 244            /*) ;;                                                             \
 245            *) dir="\$$(..)$$dir" ;;                                           \
 246            esac;                                                              \
 247            asm='.S .s';                                                       \
 248            $(check-inhibit-asm)                                               \
 249            for o in $(all-object-suffixes); do                                \
 250              set $(subst :, ,$(sysd-rules-patterns));                         \
 251              while [ $$# -ge 2 ]; do                                          \
 252                t=$$1; shift;                                                  \
 253                d=$$1; shift;                                                  \
 254                v=$${t%%%}; [ x"$$v" = x ] || v="\$$($${v}CPPFLAGS)";          \
 255                for s in $$asm .c; do                                          \
 256                  echo "\$$(objpfx)$$t$$o: $$dir/$$d$$s \$$(before-compile)";  \
 257                  echo " \$$(compile-command$$s) $$v";                         \
 258                done;                                                          \
 259              done;                                                            \
 260            done;                                                              \
 261            echo "\$$(inst_includedir)/%.h: $$dir/%.h \$$(+force)";            \
 262            echo "       \$$(do-install)";                                     \
 263          done;                                                                \
 264          echo 'sysd-rules-done = t') > $@T
 265         mv -f $@T $@
 266
 267 ifndef sysd-rules-done
 268 # Don't do deps until this exists, because it provides rules to make the deps.
 269 no_deps=t
 270 endif
 271
 272 define o-iterator-doit
 273 $(objpfx)%$o: %.S $(before-compile); $$(compile-command.S)
 274 endef
 275 object-suffixes-left := $(all-object-suffixes)
 276 include $(o-iterator)
 277
 278 define o-iterator-doit
 279 $(objpfx)%$o: %.s $(before-compile); $$(compile-command.s)
 280 endef
 281 object-suffixes-left := $(all-object-suffixes)
 282 include $(o-iterator)
 283
 284 define o-iterator-doit
 285 $(objpfx)%$o: %.c $(before-compile); $$(compile-command.c)
 286 endef
 287 object-suffixes-left := $(all-object-suffixes)
 288 include $(o-iterator)
 289
 290 define o-iterator-doit
 291 $(objpfx)%$o: %.cc $(before-compile); $$(compile-command.cc)
 292 endef
 293 object-suffixes-left := $(all-object-suffixes)
 294 include $(o-iterator)
 295
 296 # Omit the objpfx rules when building in the source tree, because
 297 # objpfx is empty and so these rules just override the ones above.
 298 ifdef objpfx
 299 # Define first rules to find the source files in $(objpfx).
 300 # Generated source files will end up there.
 301 define o-iterator-doit
 302 $(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S)
 303 endef
 304 object-suffixes-left := $(all-object-suffixes)
 305 include $(o-iterator)
 306
 307 define o-iterator-doit
 308 $(objpfx)%$o: $(objpfx)%.s $(before-compile); $$(compile-command.s)
 309 endef
 310 object-suffixes-left := $(all-object-suffixes)
 311 include $(o-iterator)
 312
 313 define o-iterator-doit
 314 $(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
 315 endef
 316 object-suffixes-left := $(all-object-suffixes)
 317 include $(o-iterator)
 318 endif
 319
 320 # Generate version maps, but wait until sysdep-subdirs is known
 321 ifeq ($(sysd-sorted-done),t)
 322 ifeq ($(versioning),yes)
 323 -include $(common-objpfx)sysd-versions
 324 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
 325 common-generated += $(version-maps)
 326 postclean-generated += sysd-versions Versions.all abi-versions.h \
 327                        Versions.def.v.i Versions.def.v Versions.v.i Versions.v
 328
 329 ifndef avoid-generated
 330 ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
 331 sysd-versions-force = FORCE
 332 FORCE:
 333 endif
 334 # See %.v/%.v.i implicit rules in Makeconfig.
 335 $(common-objpfx)Versions.def.v.i: $(..)Versions.def \
 336                                   $(wildcard $(add-ons:%=$(..)%/Versions.def))
 337 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
 338                               $(common-objpfx)soversions.i \
 339                               $(common-objpfx)Versions.def.v
 340         { while read which lib version setname; do \
 341             test x"$$which" = xDEFAULT || continue; \
 342             test -z "$$setname" || echo "$$lib : $$setname"; \
 343           done < $(word 2,$^); \
 344           cat $(word 3,$^); \
 345         } | LC_ALL=C $(AWK) -f $< > $@T
 346         mv -f $@T $@
 347 # See %.v/%.v.i implicit rules in Makeconfig.
 348 $(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
 349                               $(wildcard $(sysdirs:%=%/Versions)) \
 350                               $(common-objpfx)abi-versions.h \
 351                               $(sysd-versions-force)
 352 $(common-objpfx)sysd-versions: $(common-objpfx)Versions.all \
 353                                $(common-objpfx)Versions.v \
 354                                $(..)scripts/versions.awk
 355         ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
 356           cat $(word 2,$^) \
 357           | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
 358                             -v move_if_change='$(move-if-change)' \
 359                             -f $(word 3,$^); \
 360         ) > $@T
 361         mv -f $@T $@
 362 endif # avoid-generated
 363 endif # $(versioning) = yes
 364 endif # sysd-sorted-done
 365
 366 # Generate .dT files as we compile.
 367 compile-mkdep-flags = -MD -MP -MF $@.dt -MT $@
 368 compile-command.S = $(compile.S) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 369 compile-command.s = $(COMPILE.s) $< $(OUTPUT_OPTION) $(compile-mkdep-flags)
 370 compile-command.c = $(compile.c) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 371 compile-command.cc = $(compile.cc) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 372
 373 # GCC can grok options after the file name, and it looks nicer that way.
 374 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
 375 compile.cc = $(CXX) $< -c $(CXXFLAGS) $(CPPFLAGS)
 376 compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \
 377                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 378 COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \
 379                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 380 COMPILE.s = $(filter-out -pipe,$(CC)) -c $(ASFLAGS)
 381
 382 # We need this for the output to go in the right place.  It will default to
 383 # empty if make was configured to work with a cc that can't grok -c and -o
 384 # together.  You can't compile the C library with such a compiler.
 385 OUTPUT_OPTION = -o $@
 386
 387 # We need the $(CFLAGS) to be in there to have the right predefines during
 388 # the dependency run for C sources.  But having it for assembly sources can
 389 # get the wrong predefines.
 390 S-CPPFLAGS = -DASSEMBLER $(asm-CPPFLAGS)
 391
 392 define +make-deps
 393 $(make-target-directory)
 394 $(+mkdep) $< $(if $(filter %.c,$<),$(CFLAGS)) \
 395              $(CPPFLAGS) $($(patsubst .%,%,$(suffix $(<F)))-CPPFLAGS) | sed -e\
 396 's,$(subst .,\.,$(@F:.d=.o)),$(foreach o,$(all-object-suffixes),$(@:.d=$o)) $@,' \
 397 $(sed-remove-objpfx) $(sed-remove-dotdot) > $(@:.d=.T)
 398 mv -f $(@:.d=.T) $@ $(generate-md5)
 399 endef
 400
 401 ifneq (,$(objpfx))
 402 # Continuation lines here are dangerous because they introduce spaces!
 403 define sed-remove-objpfx
 404 -e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
 405 -e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g'
 406 endef
 407 endif
 408 \f
 409 # Modify the list of routines we build for different targets
 410
 411 ifeq (yesyes,$(build-shared)$(elf))
 412 ifndef libc.so-version
 413 # Undefine this because it can't work when we libc.so is unversioned.
 414 static-only-routines =
 415 endif
 416 endif
 417
 418 # Bounded pointer thunks are only built for *.ob
 419 elide-bp-thunks = $(addprefix $(bppfx),$(bp-thunks))
 420
 421 elide-routines.oS += $(filter-out $(static-only-routines),\
 422                                   $(routines) $(aux) $(sysdep_routines)) \
 423                      $(elide-bp-thunks)
 424 elide-routines.os += $(static-only-routines) $(elide-bp-thunks)
 425
 426 # If we have versioned code we don't need the old versions in any of the
 427 # static libraries.
 428 elide-routines.o  += $(shared-only-routines) $(elide-bp-thunks)
 429 elide-routines.op += $(shared-only-routines) $(elide-bp-thunks)
 430 elide-routines.og += $(shared-only-routines) $(elide-bp-thunks)
 431 elide-routines.ob += $(shared-only-routines)
 432 \f
 433 # Shared library building.
 434
 435 ifeq (yes,$(build-shared))
 436
 437 # Reference map file only when versioning is selected and a map file name
 438 # is given.
 439 ifeq ($(versioning),yes)
 440 map-file = $(firstword $($(@F:.so=-map)) \
 441                        $(addprefix $(common-objpfx), \
 442                                    $(filter $(@F:.so=.map),$(version-maps))))
 443 load-map-file = $(map-file:%=-Wl,--version-script=%)
 444 endif
 445
 446 # Pattern rule to build a shared object from an archive of PIC objects.
 447 # This must come after the installation rules so Make doesn't try to
 448 # build shared libraries in place from the installed *_pic.a files.
 449 # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
 450 # on other shared objects.
 451 lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(+interp)
 452 ifneq (,$(findstring aix,$(config-os)))
 453         (echo '#!'; \
 454          dump -g $< | sed '1,6d' | cut -f2 | sort | uniq) > $(<:a=exp)
 455 endif
 456         $(build-shlib)
 457
 458 ifeq ($(elf),yes)
 459 define build-shlib-helper
 460 $(LINK.o) -shared $(static-libgcc) -Wl,-O1 $(sysdep-LDFLAGS) \
 461           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) $(config-LDFLAGS) \
 462           $(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \
 463           $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
 464           -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
 465           $(LDFLAGS.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
 466           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 467 endef
 468 else
 469 ifneq (,$(findstring aix,$(config-os)))
 470 define build-shlib-helper
 471 $(LINK.o) -Wl,-G,-bM:SRE,-bnoentry,-bE:$(<:a=exp) \
 472           $(sysdep-LDFLAGS) $(config-LDFLAGS) $(extra-B-$(@F:lib%.so=%).so) \
 473           $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
 474           $(LDFLAGS.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
 475           -L$(subst :, -L,$(rpath-link))
 476 endef
 477 else
 478 endif
 479 endif
 480
 481 ifeq (yes,$(elf))
 482 ifeq (yes,$(use-default-link))
 483 # If the linker is good enough, we can let it use its default linker script.
 484 shlib-lds =
 485 shlib-lds-flags =
 486 else
 487 # binutils only position loadable notes into the first page for binaries,
 488 # not for shared objects
 489 $(common-objpfx)shlib.lds: $(common-objpfx)config.make $(..)Makerules
 490         $(LINK.o) -shared -Wl,-O1 \
 491                   -nostdlib -nostartfiles \
 492                   $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS.so) \
 493                   -Wl,--verbose 2>&1 | \
 494           sed > $@T \
 495               -e '/^=========/,/^=========/!d;/^=========/d' \
 496               $(if $(filter yes,$(have-hash-style)), \
 497                    -e 's/^.*\.gnu\.hash[        ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 498                    -e '/^[      ]*\.hash[       ]*:.*$$/{h;d;}' \
 499                    -e '/DATA_SEGMENT_ALIGN/{H;g}' \
 500                 , \
 501                    -e 's/^.*\.hash[     ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 502                ) \
 503               -e 's/^.*\*(\.dynbss).*$$/& \
 504                  PROVIDE(__start___libc_freeres_ptrs = .); \
 505                  *(__libc_freeres_ptrs) \
 506                  PROVIDE(__stop___libc_freeres_ptrs = .);/'\
 507               -e 's@^.*\*(\.jcr).*$$@& \
 508                  PROVIDE(__start___libc_subfreeres = .);\
 509                  __libc_subfreeres : { *(__libc_subfreeres) }\
 510                  PROVIDE(__stop___libc_subfreeres = .);\
 511                  PROVIDE(__start___libc_atexit = .);\
 512                  __libc_atexit : { *(__libc_atexit) }\
 513                  PROVIDE(__stop___libc_atexit = .);\
 514                  PROVIDE(__start___libc_thread_subfreeres = .);\
 515                  __libc_thread_subfreeres : { *(__libc_thread_subfreeres) }\
 516                  PROVIDE(__stop___libc_thread_subfreeres = .);\
 517                  /DISCARD/ : { *(.gnu.glibc-stub.*) }@'
 518         test -s $@T
 519         mv -f $@T $@
 520 common-generated += shlib.lds
 521
 522 shlib-lds = $(common-objpfx)shlib.lds
 523 shlib-lds-flags = -T $(shlib-lds)
 524 endif
 525
 526 define build-shlib
 527 $(build-shlib-helper) -o $@ $(shlib-lds-flags) \
 528           $(csu-objpfx)abi-note.o $(build-shlib-objlist)
 529 endef
 530 else
 531 ifneq (,$(findstring aix,$(config-os)))
 532 define build-shlib
 533 $(build-shlib-helper) \
 534         -o $@ \
 535         $(filter-out $(map-file) $(+preinit) $(+postinit),$^) \
 536         $(no-whole-archive) $(LDLIBS-$(@F:lib%.so=%).so)
 537 endef
 538 define build-shlib
 539 $(build-shlib-helper) \
 540           $(build-shlib-objlist)
 541 endef
 542 endif
 543 endif
 544
 545 ifneq (,$(findstring aix,$(config-os)))
 546 define build-module-helper
 547 $(LINK.o) -Wl,-G -Wl,-bM:SRE -Wl,-bnoentry -Wl,-bexpall \
 548           $(sysdep-LDFLAGS) $(config-LDFLAGS) \
 549           $(load-map-file) \
 550           $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
 551           -L$(subst :, -L,$(rpath-link)) -Wl,-L=$(rpath-link)
 552 endef
 553 else
 554 define build-module-helper
 555 $(LINK.o) -shared $(static-libgcc) $(sysdep-LDFLAGS) $(config-LDFLAGS) \
 556           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
 557           -B$(csu-objpfx) $(load-map-file) \
 558           $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
 559           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 560 endef
 561 endif
 562
 563 # This macro is similar to build-shlib but it does not define a soname
 564 # and it does not depend on the destination name to start with `lib'.
 565 ifeq (yes,$(elf))
 566 # binutils only position loadable notes into the first page for binaries,
 567 # not for shared objects
 568 define build-module
 569 $(build-module-helper) -o $@ $(shlib-lds-flags) \
 570           $(csu-objpfx)abi-note.o $(build-module-objlist)
 571 endef
 572 define build-module-asneeded
 573 $(build-module-helper) -o $@ $(shlib-lds-flags) \
 574           $(csu-objpfx)abi-note.o \
 575           -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed
 576 endef
 577 else
 578 ifneq (,$(findstring aix,$(config-os)))
 579 define build-module
 580 $(build-module-helper) \
 581           -o $@ \
 582           $(filter-out $(map-file) $(+preinit) $(+postinit),$^) \
 583           $(no-whole-archive) $(LDLIBS-$(@F:%.so=%).so)
 584 endef
 585 else
 586 define build-module
 587 define build-module
 588 $(build-module-helper) \
 589           -o $@ \
 590           $(build-module-objlist)
 591 endef
 592 endif
 593 endif
 594
 595 build-module-helper-objlist = \
 596         $(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\
 597                    $(filter-out %.lds $(map-file) $(+preinit) $(+postinit),$^))
 598
 599 build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so)
 600 build-shlib-objlist = $(build-module-helper-objlist) \
 601                       $(LDLIBS-$(@F:lib%.so=%).so)
 602
 603 # Don't try to use -lc when making libc.so itself.
 604 # Also omits crti.o and crtn.o, which we do not want
 605 # since we define our own `.init' section specially.
 606 LDFLAGS-c.so = -nostdlib -nostartfiles
 607 # But we still want to link libc.so against $(libc.so-gnulib).
 608 LDLIBS-c.so += $(libc.so-gnulib)
 609 # Give libc.so an entry point and make it directly runnable itself.
 610 LDFLAGS-c.so += -e __libc_main
 611 # If lazy relocation is disabled add the -z now flag.
 612 ifeq ($(bind-now),yes)
 613 LDFLAGS-c.so += -Wl,-z,now
 614 endif
 615 # Pre-link the objects of libc_pic.a so that we can locally resolve
 616 # COMMON symbols before we link against ld.so.  This is because ld.so
 617 # contains some of libc_pic.a already, which will prevent the COMMONs
 618 # from being allocated in libc.so, which introduces evil dependencies
 619 # between libc.so and ld.so, which can make it impossible to upgrade.
 620 ifeq ($(elf),yes)
 621 $(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
 622         $(LINK.o) -nostdlib -nostartfiles -r -o $@ \
 623         $(LDFLAGS-c_pic.os) -Wl,-d $(whole-archive) $^ -o $@
 624
 625 ifeq (,$(strip $(shlib-lds-flags)))
 626 # Generate a list of -R options to excise .gnu.glibc-stub.* sections.
 627 $(common-objpfx)libc_pic.opts: $(common-objpfx)libc_pic.os
 628         $(OBJDUMP) -h $< | \
 629         $(AWK) '$$2 ~ /\.gnu\.glibc-stub\./ { print "-R", $$2 }' \
 630                 > $@T
 631         mv -f $@T $@
 632 # Apply those -R options.
 633 $(common-objpfx)libc_pic.os.clean: $(common-objpfx)libc_pic.opts \
 634                                    $(common-objpfx)libc_pic.os
 635         $(OBJCOPY) @$^ $@
 636 generated += libc_pic.opts libc_pic.os.clean
 637
 638 libc_pic_clean := .clean
 639 endif
 640
 641 # Use our own special initializer and finalizer files for libc.so.
 642 $(common-objpfx)libc.so: $(elfobjdir)/soinit.os \
 643                          $(common-objpfx)libc_pic.os$(libc_pic_clean) \
 644                          $(elfobjdir)/sofini.os \
 645                          $(elfobjdir)/interp.os $(elfobjdir)/ld.so \
 646                          $(shlib-lds)
 647         $(build-shlib)
 648 ifeq ($(versioning),yes)
 649 $(common-objpfx)libc.so: $(common-objpfx)libc.map
 650 endif
 651 common-generated += libc.so libc_pic.os
 652 ifdef libc.so-version
 653 $(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
 654         $(make-link)
 655 common-generated += libc.so$(libc.so-version)
 656 endif
 657 endif
 658 else
 659 ifneq (,$(findstring aix,$(config-os)))
 660 $(common-objpfx)libc.so: $(common-objpfx)libc_pic.a
 661         @rm -f $@
 662         (echo '#!'; \
 663          dump -g $^ | sed '1,6d' | cut -f2 | sort | uniq) > $(^:a=exp)
 664         sed '/__mulh/d;/__mull/d;/__divss/d;/__divus/d;/__quoss/d;/__quous/d' \
 665             /lib/syscalls.exp > $(common-objpfx)syscalls.exp
 666         $(LINK.o) -G -bM:SRE -bnoentry -bE:$(^:a=exp) \
 667                   -bE:$(common-objpfx)syscalls.exp \
 668                   -bI:$(common-objpfx)syscalls.exp \
 669                   -L$(common-objpfx) -o $@ $^
 670 # AIX runtime ld wants libc.so to be libc.a(shr.o) hardwired
 671         cp $@ $(common-objpfx)shr.o
 672         $(AR) $(ARFLAGS) $(common-objpfx)libc.a $(common-objpfx)shr.o
 673 endif
 674 endif
 675 \f
 676 # Figure out the source filenames in this directory.
 677
 678 override sources := $(addsuffix .c,\
 679                         $(filter-out $(elided-routines),\
 680                             $(routines) $(aux) \
 681                             $(sysdep_routines)))
 682 sysdep_routines := $(sysdep_routines)
 683
 684 headers := $(headers) $(sysdep_headers)
 685
 686 # This is the list of all object files, gotten by
 687 # replacing every ".c" in `sources' with a ".o".
 688 # We also add bounded-pointer thunks, which are later
 689 # elided for all suffixes except for `.ob'.
 690 override objects := $(addprefix $(objpfx),$(sources:.c=.o) \
 691                       $(patsubst %,$(bppfx)%.o,\
 692                         $(filter $(routines) $(sysdep_routines),$(bp-thunks))))
 693
 694
 695 # The makefile may define $(extra-libs) with `libfoo libbar'
 696 # to build libfoo.a et al from the modules listed in $(libfoo-routines).
 697 ifdef extra-libs
 698 # extra-lib.mk is included once for each extra lib to define rules
 699 # to build it, and to add its objects to the various variables.
 700 # During its evaluation, $(lib) is set to the name of the library.
 701 extra-libs-left := $(extra-libs)
 702 include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
 703 endif
 704
 705
 706 # The makefile may define $(modules-names) to build additional modules.
 707 # These are built with $(build-module), except any in $(modules-names-nobuild).
 708 ifdef modules-names
 709 # extra-lib.mk is included once for each extra lib to define rules
 710 # to build it, and to add its objects to the various variables.
 711 # During its evaluation, $(lib) is set to the name of the library.
 712 extra-modules-left := $(modules-names)
 713 include $(patsubst %,$(..)extra-modules.mk,$(modules-names))
 714
 715 extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names))
 716 $(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \
 717                 $(objpfx)%.os $(shlib-lds) \
 718                 $(common-objpfx)libc.so $(common-objpfx)libc_nonshared.a
 719         $(build-module)
 720 endif
 721 \f
 722 +depfiles := $(sources:.c=.d) \
 723              $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \
 724              $(patsubst %.o,%.d,$(filter %.o,$(extra-test-objs:.os=.o))) \
 725              $(addsuffix .d,$(tests) $(xtests) $(test-srcs))
 726 ifeq ($(build-programs),yes)
 727 +depfiles += $(addsuffix .d,$(others) $(sysdep-others))
 728 endif
 729 +depfiles := $(addprefix $(objpfx),\
 730                          $(filter-out $(addsuffix .d,$(omit-deps)),\
 731                                       $(+depfiles)))
 732 all-dt-files := $(foreach o,$(object-suffixes-for-libc),$(+depfiles:.d=$o.dt))
 733 +depfiles := $(patsubst %.dt,%.d,$(wildcard $(all-dt-files))) \
 734              $(wildcard $(all-dt-files:.dt=.d))
 735
 736 # This is a funny rule in that it removes its input file.
 737 %.d: %.dt
 738         @sed $(sed-remove-objpfx) $< > $(@:.d=.T) && \
 739          mv -f $(@:.d=.T) $@ && \
 740          rm -f $<
 741
 742 # Avoid the .h.d files for any .sym files whose .h files don't exist yet.
 743 # They will be generated when they're needed, and trying too early won't work.
 744 +gen-as-const := $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 745 +depfiles += $(addsuffix .d,$(filter $(wildcard $(+gen-as-const)),\
 746                                                 $(+gen-as-const)))
 747
 748 ifdef +depfiles
 749 ifneq ($(no_deps),t)
 750 -include $(+depfiles)
 751 endif
 752 endif
 753 \f\f
 754 # Maximize efficiency by minimizing the number of rules.
 755 .SUFFIXES:      # Clear the suffix list.  We don't use suffix rules.
 756 # Don't define any builtin rules.
 757 MAKEFLAGS := $(MAKEFLAGS)r
 758
 759 # Generic rule for making directories.
 760 %/:
 761 # mkdir isn't smart enough to strip a trailing /.
 762 # We always require a mkdir which supports the -p option to avoid error
 763 # messages in case of races.
 764         mkdir -p $(@:%/=%)
 765 \f
 766 # Make sure that object files are not removed
 767 # when they are intermediates between sources and library members.
 768 .PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes))
 769
 770 # Make sure that the parent library archive is never removed.
 771 .PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 772 \f
 773 # Use the verbose option of ar and tar when not running silently.
 774 ifeq    "$(findstring s,$(MAKEFLAGS))" ""       # if not -s
 775 verbose := v
 776 else                                            # -s
 777 verbose :=
 778 endif                                           # not -s
 779
 780 ARFLAGS := r$(verbose)
 781 CREATE_ARFLAGS := cru$(verbose)
 782 \f
 783 # This makes all the object files in the parent library archive.
 784
 785 .PHONY: lib lib-noranlib
 786 lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 787 lib-noranlib: libobjs
 788
 789 # For object-suffix $o, the list of objects with that suffix.
 790 # Makefiles can define `elide-routines.so = foo' to leave foo.so out.
 791 o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
 792                                                        $(elide-routines$o)),\
 793                                             $(objects))) \
 794             $(addprefix $(objpfx),$(o-objects$o))
 795
 796 others: $(addprefix $(objpfx),$(install-lib))
 797
 798 ifndef objects
 799
 800 # Create the stamp$o files to keep the parent makefile happy.
 801 subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 802 $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o):
 803         $(make-target-directory)
 804         rm -f $@; > $@
 805 else
 806
 807 # Define explicit rules to update each $(objpfx)stamp.SUFFIX
 808 # timestamp file; these rules (one explicit rule is generated for each
 809 # object suffix) write a list of objects to update in the stamp file.
 810 # The parent will then actually add them all to the archive in the
 811 # archive rule, below.
 812 define o-iterator-doit
 813 $(objpfx)stamp$o: $(o-objects); $$(do-stamp)
 814 endef
 815 define do-stamp
 816 $(make-target-directory)
 817 echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T
 818 mv -f $@T $@
 819 endef
 820 object-suffixes-left := $(object-suffixes-for-libc)
 821 include $(o-iterator)
 822
 823 endif
 824
 825 # Now define explicit rules to build the library archives; these depend
 826 # on the stamp files built above.
 827 define o-iterator-doit
 828 $(common-objpfx)$(patsubst %,$(libtype$o),c): \
 829                 $(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib)
 830 endef
 831 define do-makelib
 832 cd $(common-objdir) && \
 833 $(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)`
 834 endef
 835 subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%)
 836 subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
 837 ifndef subdir
 838 $(subdirs-stamps): subdir_lib;
 839 endif
 840 object-suffixes-left = $(object-suffixes-for-libc)
 841 include $(o-iterator)
 842
 843
 844 # This makes all the object files.
 845 .PHONY: objects objs libobjs extra-objs
 846 objects objs: libobjs extra-objs
 847 libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 848 extra-objs: $(addprefix $(objpfx),$(extra-objs))
 849
 850 # Canned sequence for building an extra library archive.
 851 define build-extra-lib
 852 $(patsubst %/,cd % &&,$(objpfx)) \
 853 $(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \
 854       $(patsubst $(objpfx)%,%,$^)
 855 endef
 856 \f
 857 # Installation.
 858
 859 .PHONY: force-install
 860 force-install:
 861
 862 # $(install-lib) are installed from the object directory into $(libdir);
 863 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
 864 # unless they also appear in $(non-lib.a).  $(install-data) are installed as
 865 # they are into $(datadir).  $(headers) are installed as they are in
 866 # $(includedir).  $(install-bin), $(install-bin-script) and $(install-sbin)
 867 # are installed from the object directory into $(bindir), $(bindir) and
 868 # $(sbindir), respectively.  $(install-others) and $(install-others-programs)
 869 # are absolute path names of files to install; rules to install them are
 870 # defined elsewhere.
 871
 872 # The simple library name to install libc.a under.
 873 # This could be defined by a sysdep Makefile.
 874 ifndef libc-name
 875 libc-name := c
 876 endif
 877
 878 define do-install
 879 $(make-target-directory)
 880 $(INSTALL_DATA) $< $@
 881 endef
 882
 883 # Make the target directory if it doesn't exist, using the `mkinstalldirs'
 884 # script that does `mkdir -p' even if `mkdir' doesn't support that flag.
 885 define make-target-directory
 886 $(addprefix $(..)./scripts/mkinstalldirs ,\
 887             $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
 888 endef
 889
 890 # Any directory (parent or subdir) should install libc.a; this way
 891 # "make install" in a subdir is guaranteed to install everything it changes.
 892 installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
 893                              $(inst_libdir)/$(patsubst %,$(libtype$o),\
 894                                                      $(libprefix)$(libc-name)))
 895 install: $(installed-libcs)
 896 $(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
 897         $(make-target-directory)
 898         $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
 899
 900 define do-install-program
 901 $(make-target-directory)
 902 $(INSTALL_PROGRAM) $< $@.new
 903 mv -f $@.new $@
 904 endef
 905
 906 define do-install-script
 907 $(make-target-directory)
 908 $(INSTALL_SCRIPT) $< $@.new
 909 mv -f $@.new $@
 910 endef
 911
 912 install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
 913 install-lib := $(filter-out %.so %_pic.a,$(install-lib))
 914
 915 ifeq (yes,$(build-shared))
 916 # Find which .so's have versions.
 917 versioned := $(strip $(foreach so,$(install-lib.so),\
 918                                $(patsubst %,$(so),$($(so)-version))))
 919
 920 install-lib.so-versioned := $(filter $(versioned), $(install-lib.so))
 921 install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so))
 922
 923 # For versioned libraries, we install three files:
 924 #       $(inst_libdir)/libfoo.so        -- for linking, symlink or ld script
 925 #       $(inst_slibdir)/libfoo.so.NN    -- for loading by SONAME, symlink
 926 #       $(inst_slibdir)/libfoo-X.Y.Z.so -- the real shared object file
 927 V := $(firstword $($(subdir)-version) $(version))
 928 install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \
 929                       $(foreach L,$(install-lib.so-versioned),\
 930                                 $(inst_libdir)/$L \
 931                                 $(inst_slibdir)/$(L:.so=)-$V.so \
 932                                 $(inst_slibdir)/$L$($L-version))
 933
 934 # Install all the unversioned shared libraries.
 935 $(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \
 936     $(objpfx)%.so $(+force)
 937         $(do-install-program)
 938
 939 ifneq ($(findstring -s,$(LN_S)),)
 940 define make-link
 941 rm -f $@.new
 942 $(SHELL) $(..)scripts/rellns-sh $< $@.new
 943 mv -f $@.new $@
 944 endef
 945 else
 946 # If we have no symbolic links don't bother with rellns-sh.
 947 define make-link
 948 rm -f $@.new
 949 $(LN_S) $< $@.new
 950 mv -f $@.new $@
 951 endef
 952 endif
 953
 954 ifeq (yes,$(build-shared))
 955 ifeq (no,$(cross-compiling))
 956 symbolic-link-prog := $(common-objpfx)elf/sln
 957 symbolic-link-list := $(common-objpfx)elf/symlink.list
 958 define make-shlib-link
 959 echo $(<F) $@ >> $(symbolic-link-list)
 960 endef
 961 else # cross-compiling
 962 # We need a definition that can be used by elf/Makefile's install rules.
 963 symbolic-link-prog = $(LN_S)
 964 endif
 965 endif
 966 ifndef make-shlib-link
 967 define make-shlib-link
 968 rm -f $@
 969 $(LN_S) $(<F) $@
 970 endef
 971 endif
 972
 973 ifdef libc.so-version
 974 # For a library specified to be version N, install three files:
 975 # libc.so       ->      libc.so.N       (e.g. libc.so.6)
 976 # libc.so.6     ->      libc-VERSION.so (e.g. libc-1.10.so)
 977
 978 $(inst_slibdir)/libc.so$(libc.so-version): $(inst_slibdir)/libc-$(version).so \
 979                                            $(+force)
 980         $(make-shlib-link)
 981 $(inst_slibdir)/libc-$(version).so: $(common-objpfx)libc.so $(+force)
 982         $(do-install-program)
 983 install: $(inst_slibdir)/libc.so$(libc.so-version)
 984
 985 # This fragment of linker script gives the OUTPUT_FORMAT statement
 986 # for the configuration we are building.  We put this statement into
 987 # the linker scripts we install for -lc et al so that they will not be
 988 # used by a link for a different format on a multi-architecture system.
 989 $(common-objpfx)format.lds: $(..)scripts/output-format.sed \
 990                             $(common-objpfx)config.make \
 991                             $(common-objpfx)config.h $(..)Makerules
 992 ifneq (unknown,$(output-format))
 993         echo > $@.new 'OUTPUT_FORMAT($(output-format))'
 994 else
 995         $(LINK.o) -shared $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS.so) \
 996                   -x c /dev/null -o $@.so -Wl,--verbose -v 2>&1 \
 997         | sed -n -f $< > $@.new
 998         test -s $@.new
 999         rm -f $@.so
1000 endif
1001         mv -f $@.new $@
1002 common-generated += format.lds
1003
1004 ifndef subdir
1005 # What we install as libc.so for programs to link against is in fact a
1006 # link script.  It contains references for the various libraries we need.
1007 # The libc.so object is not complete since some functions are only defined
1008 # in libc_nonshared.a.
1009 # We need to use absolute paths since otherwise local copies (if they exist)
1010 # of the files are taken by the linker.
1011 install: $(inst_libdir)/libc.so
1012 $(inst_libdir)/libc.so: $(common-objpfx)format.lds \
1013                         $(common-objpfx)libc.so$(libc.so-version) \
1014                         $(inst_libdir)/$(patsubst %,$(libtype.oS),\
1015                                                   $(libprefix)$(libc-name)) \
1016                         $(+force)
1017         (echo '/* GNU ld script';\
1018          echo '   Use the shared library, but some functions are only in';\
1019          echo '   the static library, so try that secondarily.  */';\
1020          cat $<; \
1021          echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \
1022               '$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\
1023               ' AS_NEEDED (' $(slibdir)/$(rtld-installed-name) ') )' \
1024         ) > $@.new
1025         mv -f $@.new $@
1026
1027 endif
1028
1029 else
1030 install: $(inst_slibdir)/libc.so
1031 $(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force)
1032         $(do-install-program)
1033 endif
1034
1035 ifneq (,$(versioned))
1036 # Produce three sets of rules as above for all the smaller versioned libraries.
1037
1038 define o-iterator-doit
1039 $(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link)
1040 endef
1041 object-suffixes-left := $(filter-out $(install-lib-ldscripts),$(versioned))
1042 ifneq (,$(object-suffixes-left))
1043 include $(o-iterator)
1044 endif
1045
1046 # Make symlinks in the build directory, because the versioned names might
1047 # be referenced by a DT_NEEDED in another library.
1048 define o-iterator-doit
1049 $(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
1050 endef
1051 object-suffixes-left := $(versioned)
1052 include $(o-iterator)
1053
1054 generated += $(foreach o,$(versioned),$o$($o-version))
1055
1056 ifeq (,$($(subdir)-version))
1057 define o-iterator-doit
1058 $(inst_slibdir)/$o$($o-version): $(inst_slibdir)/$(o:.so=)-$(version).so \
1059                                  $(+force);
1060         $$(make-shlib-link)
1061 endef
1062 object-suffixes-left := $(versioned)
1063 include $(o-iterator)
1064
1065 define o-iterator-doit
1066 $(inst_slibdir)/$(o:.so=)-$(version).so: $(objpfx)$o $(+force);
1067         $$(do-install-program)
1068 endef
1069 object-suffixes-left := $(versioned)
1070 include $(o-iterator)
1071 else
1072 define o-iterator-doit
1073 $(inst_slibdir)/$o$($o-version): \
1074   $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so $(+force);
1075         $$(make-shlib-link)
1076 endef
1077 object-suffixes-left := $(versioned)
1078 include $(o-iterator)
1079
1080 define o-iterator-doit
1081 $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so: $(objpfx)$o $(+force);
1082         $$(do-install-program)
1083 endef
1084 object-suffixes-left := $(versioned)
1085 include $(o-iterator)
1086 endif
1087 endif
1088
1089 define do-install-so
1090 $(do-install-program)
1091 $(patsubst %,ln -s -f $(@F) $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
1092            $(filter-out %.so,$@))
1093 endef
1094
1095 so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
1096 $(foreach v,$(so-versions),\
1097           $(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \
1098                                                $(+force)
1099         $(do-install-so)
1100 $(foreach v,$(so-versions),\
1101           $(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force)
1102         $(do-install-so)
1103 endif
1104
1105 ifdef install-bin
1106 $(addprefix $(inst_bindir)/,$(install-bin)): \
1107     $(inst_bindir)/%: $(objpfx)% $(+force)
1108         $(do-install-program)
1109 endif
1110 ifdef install-bin-script
1111 $(addprefix $(inst_bindir)/,$(install-bin-script)): \
1112     $(inst_bindir)/%: $(objpfx)% $(+force)
1113         $(do-install-script)
1114 endif
1115 ifdef install-rootsbin
1116 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \
1117    $(inst_rootsbindir)/%: $(objpfx)% $(+force)
1118         $(do-install-program)
1119 endif
1120 ifdef install-sbin
1121 $(addprefix $(inst_sbindir)/,$(install-sbin)): \
1122     $(inst_sbindir)/%: $(objpfx)% $(+force)
1123         $(do-install-program)
1124 endif
1125 ifdef install-lib
1126 install-lib.a := $(filter lib%.a,$(install-lib))
1127 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
1128 ifdef install-lib-non.a
1129 $(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
1130   $(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force)
1131         $(do-install)
1132 endif
1133 ifdef install-lib.a
1134 $(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \
1135   $(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force)
1136         $(do-install)
1137 endif
1138 endif
1139 ifdef install-data
1140 $(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force)
1141         $(do-install)
1142 endif
1143 headers := $(strip $(headers))
1144 ifdef headers
1145 # This implicit rule installs headers from the source directory.
1146 # It may be ignored in preference to rules from sysd-rules to find
1147 # headers in the sysdeps tree.
1148 $(inst_includedir)/%.h: $(objpfx)%.h $(+force)
1149         $(do-install)
1150 $(inst_includedir)/%.h: %.h $(+force)
1151         $(do-install)
1152 $(inst_includedir)/%.h: $(..)include/%.h $(+force)
1153         $(do-install)
1154 headers-nonh := $(filter-out %.h,$(headers))
1155 ifdef headers-nonh
1156 $(addprefix $(inst_includedir)/,$(headers-nonh)): $(inst_includedir)/%: \
1157                                                  % $(+force)
1158         $(do-install)
1159 endif   # headers-nonh
1160 endif   # headers
1161
1162 .PHONY: install-bin-nosubdir install-bin-script-nosubdir \
1163         install-rootsbin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
1164         install-data-nosubdir install-headers-nosubdir
1165 install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin))
1166 install-bin-script-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin-script))
1167 install-rootsbin-nosubdir: \
1168         $(addprefix $(inst_rootsbindir)/,$(install-rootsbin))
1169 install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin))
1170 install-lib-nosubdir: $(addprefix $(inst_libdir)/,\
1171                        $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
1172                        $(addprefix $(libprefix),$(install-lib-non.a)))
1173 install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data))
1174 install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers))
1175 install-others-nosubdir: $(install-others)
1176 install-others-programs-nosubdir: $(install-others-programs)
1177
1178 # We need all the `-nosubdir' targets so that `install' in the parent
1179 # doesn't depend on several things which each iterate over the subdirs.
1180 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
1181 # subroutine.  Then in the parent `install-FOO' also causes subdir makes.
1182 install-%:: install-%-nosubdir ;
1183
1184 .PHONY: install install-no-libc.a-nosubdir
1185 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir \
1186                             install-lib-nosubdir install-others-nosubdir
1187 ifeq ($(build-programs),yes)
1188 install-no-libc.a-nosubdir: install-bin-nosubdir install-bin-script-nosubdir \
1189                             install-rootsbin-nosubdir install-sbin-nosubdir \
1190                             install-others-programs-nosubdir
1191 endif
1192 install: install-no-libc.a-nosubdir
1193 \f
1194 # Command to compile $< in $(objdir) using the native libraries.
1195 define native-compile
1196 $(make-target-directory)
1197 $(patsubst %/,cd % &&,$(objpfx)) \
1198 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
1199             $(firstword $(filter /%,$< $(shell pwd)/$<)) -o $(@F)
1200 endef
1201
1202 # Command to compile $< in $(common-objdir) using the native libraries.
1203 # We must cd to $(objdir) anyway so that $(..)config.h is valid.
1204 define common-objdir-compile
1205 $(patsubst %/,cd % &&,$(objpfx)) \
1206 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
1207             $(firstword $(filter /%,$< $(shell pwd)/$<)) -o $(..)$(@F)
1208 endef
1209
1210 # We always want to use configuration definitions.
1211 # Note that this is only used for commands running in $(objpfx).
1212 ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) -include $(..)config.h
1213
1214 # Support the GNU standard name for this target.
1215 .PHONY: check
1216 check: tests
1217 # Special target to run tests which cannot be run unconditionally.
1218 # Maintainers should use this target.
1219 .PHONY: xcheck
1220 xcheck: xtests
1221
1222 all-nonlib = $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) $(others))
1223 ifneq (,$(all-nonlib))
1224 cpp-srcs-left = $(all-nonlib:=.c) $(all-nonlib:=.cc)
1225 lib := nonlib
1226 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
1227 endif
1228
1229 # The include magic above causes those files to use this variable for flags.
1230 CPPFLAGS-nonlib = -DNOT_IN_libc=1
1231
1232
1233 ifeq ($(versioning),yes)
1234 # Generate normalized lists of symbols, versions, and data sizes.
1235 # This is handy for checking against existing library binaries.
1236
1237 %.symlist: $(..)scripts/abilist.awk %.dynsym
1238         LC_ALL=C $(AWK) -f $^ > $@T
1239         mv -f $@T $@
1240
1241 %.dynsym: %.so
1242         $(OBJDUMP) --dynamic-syms $< > $@T
1243         mv -f $@T $@
1244
1245 check-abi-%: $(..)scripts/extract-abilist.awk $(common-objpfx)config.make \
1246              $(..)abilist/%.abilist $(objpfx)%.symlist
1247         $(check-abi)
1248 check-abi-%: $(..)scripts/extract-abilist.awk $(common-objpfx)config.make \
1249              $(..)abilist/%.abilist $(common-objpfx)%.symlist
1250         $(check-abi)
1251 define check-abi
1252         LC_ALL=C \
1253         $(AWK) -f $< -v 'config=$(check-abi-config)' \
1254                $(patsubst %,-v 'lastversion=%',$($*-abi-frozen)) \
1255                $(filter %.abilist,$^) \
1256         | { diff -p -U 0 - $(filter %.symlist,$^) $(check-abi-warn) ; }
1257 endef
1258 ifeq ($(enable-check-abi),warn)
1259 check-abi-warn = || echo '*** WARNING: $*.so failed ABI check'
1260 endif
1261
1262 ifeq ($(firstword $(sysd-sorted-done) f)$(firstword $(generating) f),tf)
1263 -include $(common-objpfx)tls.make
1264 config-tls := tls
1265 ifeq ($(use-thread),yes)
1266 config-tls := thread
1267 endif
1268 check-abi-config := \
1269   $(config-machine)-$(config-vendor)-$(config-os)/$(config-tls)
1270 endif
1271
1272 update-abi-%: $(..)scripts/merge-abilist.awk $(..)abilist/%.abilist \
1273               $(objpfx)%.symlist
1274         $(update-abi)
1275 update-abi-%: $(..)scripts/merge-abilist.awk $(..)abilist/%.abilist \
1276               $(common-objpfx)%.symlist
1277         $(update-abi)
1278 ifndef update-abi-config
1279 define update-abi
1280         @echo 'Run $(MAKE) $@ update-abi-config=REGEXP'; exit 2
1281 endef
1282 else
1283 define update-abi
1284 LC_ALL=C $(AWK) -v config='$(update-abi-config)' -f $^ \
1285          > $(..)abilist/$*.abilist.new
1286 @if cmp -s $(..)abilist/$*.abilist.new $(..)abilist/$*.abilist 2> /dev/null; \
1287  then rm -f $(..)abilist/$*.abilist.new; \
1288       echo '+++ $(..)abilist/$*.abilist is unchanged'; \
1289  else mv -f $(..)abilist/$*.abilist.new $(..)abilist/$*.abilist; \
1290       echo '*** Now check $*.abilist changes for correctness ***'; \
1291  fi
1292 endef
1293 endif
1294
1295 .PHONY: update-abi check-abi
1296 update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned))
1297 check-abi: $(patsubst %.so,check-abi-%,$(install-lib.so-versioned))
1298 ifdef subdir
1299 subdir_check-abi: check-abi
1300 subdir_update-abi: update-abi
1301 else
1302 check-abi: subdir_check-abi
1303 update-abi: subdir_update-abi
1304 endif
1305
1306 ifeq ($(subdir),elf)
1307 check-abi: check-abi-libc
1308 update-abi: update-abi-libc
1309 common-generated += libc.symlist
1310 endif
1311
1312 ifeq ($(build-shared),yes)
1313 ifneq ($(enable-check-abi),no)
1314 ifdef subdir
1315 tests: check-abi
1316 endif
1317 endif
1318 endif
1319
1320 endif
1321
1322 # These will have been set by sysdeps/posix/Makefile.
1323 L_tmpnam  ?= 1
1324 TMP_MAX   ?= 0
1325 L_ctermid ?= 1
1326 L_cuserid ?= 1
1327
1328 stdio_lim = $(common-objpfx)bits/stdio_lim.h
1329
1330 $(stdio_lim:lim.h=%.h) $(stdio_lim:lim.h=%.d): $(stdio_lim:lim.h=%.st); @:
1331 $(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \
1332                    $(common-objpfx)config.make
1333         $(make-target-directory)
1334         { echo '#include "$(..)posix/bits/posix1_lim.h"';               \
1335           echo '#define _LIBC 1';                                       \
1336           echo '#include "$(..)misc/sys/uio.h"'; } |                    \
1337         $(CC) -E -dM -MD -MP -MF $(@:st=dT) -MT '$(@:st=h) $(@:st=d)'   \
1338               $(+includes) -xc - -o $(@:st=hT)
1339         sed $(sed-remove-objpfx) $(sed-remove-dotdot)                   \
1340             $(@:st=dT) > $(@:st=dt)
1341         mv -f $(@:st=dt) $(@:st=d)
1342         fopen_max=`sed -n 's/^#define OPEN_MAX //1p' $(@:st=hT)`;       \
1343         filename_max=`sed -n 's/^#define PATH_MAX //1p' $(@:st=hT)`;    \
1344         iov_max=`sed -n 's/^#define UIO_MAXIOV //p' $(@:st=hT)`;        \
1345         fopen_max=$${fopen_max:-16};                                    \
1346         filename_max=$${filename_max:-1024};                            \
1347         if [ -z "$$iov_max" ]; then                                     \
1348           define_iov_max="# undef IOV_MAX";                             \
1349         else                                                            \
1350           define_iov_max="# define IOV_MAX $$iov_max";                  \
1351         fi;                                                             \
1352         sed -e "s/@FOPEN_MAX@/$$fopen_max/"                             \
1353             -e "s/@FILENAME_MAX@/$$filename_max/"                       \
1354             -e "s/@L_tmpnam@/$(L_tmpnam)/"                              \
1355             -e "s/@TMP_MAX@/$(TMP_MAX)/"                                \
1356             -e "s/@L_ctermid@/$(L_ctermid)/"                            \
1357             -e "s/@L_cuserid@/$(L_cuserid)/"                            \
1358             -e "s/@define_IOV_MAX@/$$define_iov_max/"                   \
1359             $< > $(@:st=h.new)
1360         $(move-if-change) $(@:st=h.new) $(@:st=h)
1361 # Remove these last so that they can be examined if something went wrong.
1362         rm -f $(@:st=hT) $(@:st=dT) $(@:st=dt)
1363         touch $@
1364 # Get dependencies.
1365 ifndef no_deps
1366 -include $(stdio_lim:h=d)
1367 endif
1368 common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st
1369 \f
1370 FORCE:
1371
1372 .PHONY: echo-headers
1373 echo-headers:
1374         @echo $(headers)
1375
1376 %.bz2: %; bzip2 -9vk $<
1377 %.gz: %; gzip -9vnc $< > $@.new && mv -f $@.new $@
1378 %.xz: %; xz -9evk $<
1379 \f
1380 # Common cleaning targets.
1381
1382 .PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean
1383 clean: common-clean
1384 mostlyclean: common-mostlyclean
1385
1386 do-tests-clean:
1387         -rm -f $(addprefix $(objpfx),$(addsuffix .out,$(tests) $(xtests) \
1388                                                       $(test-srcs)) \
1389                                      $(addsuffix -bp.out,$(tests) $(xtests) \
1390                                                          $(test-srcs)))
1391
1392 # Remove the object files.
1393 common-mostlyclean:
1394         -rm -f $(addprefix $(objpfx),$(tests) $(xtests) $(test-srcs) \
1395                                      $(others) $(sysdep-others) stubs \
1396                                      $(addsuffix .o,$(tests) $(xtests) \
1397                                                     $(test-srcs) $(others) \
1398                                                     $(sysdep-others)) \
1399                                      $(addsuffix -bp,$(tests) $(xtests) \
1400                                                      $(test-srcs)) \
1401                                      $(addsuffix .out,$(tests) $(xtests) \
1402                                                       $(test-srcs)) \
1403                                      $(addsuffix -bp.out,$(tests) $(xtests) \
1404                                                          $(test-srcs)))
1405         -rm -f $(addprefix $(objpfx),$(extra-objs) $(extra-test-objs) \
1406                                      $(install-lib) $(install-lib.so) \
1407                                      $(install-lib.so:%.so=%_pic.a))
1408         -rm -f core
1409         -rm -f $(objpfx)rtld-*.os
1410         $(rmobjs)
1411 define rmobjs
1412 $(foreach o,$(object-suffixes-for-libc),
1413 -rm -f $(objpfx)stamp$o $(o-objects))
1414 endef
1415
1416 # Also remove the dependencies and generated source files.
1417 common-clean: common-mostlyclean
1418         -rm -f $(addprefix $(objpfx),$(generated))
1419         -rm -f $(objpfx)*.d $(objpfx)*.dt
1420         -rm -fr $(addprefix $(objpfx),$(generated-dirs))
1421         -rm -f $(addprefix $(common-objpfx),$(common-generated))
1422 \f
1423 # Produce a file `stubs' which contains `#define __stub_FUNCTION'
1424 # for each function which is a stub.  We grovel over all the .d files
1425 # looking for references to <stub-tag.h>.  Then we grovel over each
1426 # referenced source file to see what stub function it defines.
1427
1428 ifdef objpfx
1429 .PHONY: stubs # The parent Makefile calls this target.
1430 stubs: $(objpfx)stubs
1431 endif
1432 objs-for-stubs := $(foreach o,$(object-suffixes-for-libc),$(o-objects)) \
1433                   $(addprefix $(objpfx),$(extra-objs))
1434 $(objpfx)stubs: $(objs-for-stubs)
1435 ifneq (,$(strip $(objs-for-stubs)))
1436         (cd $(objpfx).; $(OBJDUMP) -h $(patsubst $(objpfx)%,%,$^)) | \
1437         $(AWK) '/\.gnu\.glibc-stub\./ { \
1438                   sub(/\.gnu\.glibc-stub\./, "", $$2); \
1439                   stubs[$$2] = 1; } \
1440                 END { for (s in stubs) print "#define __stub_" s }' > $@T
1441         mv -f $@T $@
1442 else
1443         > $@
1444 endif
1445 \f
1446 ifneq (,$(strip $(gpl2lgpl)))
1447 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
1448 # Snarf from the master source and frob the copying notice.
1449 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
1450         sed -f $^ > $@-tmp
1451 # So I don't edit them by mistake.
1452         chmod a-w $@-tmp
1453         mv -f $@-tmp $@
1454 endif
1455 endif
1456
1457 # Local Variables:
1458 # mode: makefile
1459 # End: