Makerules

   1 # Copyright (C) 1991-2002, 2003, 2004, 2005 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 # `configure' writes a definition of `config-sysdirs' in `config.make'.
  60 sysdirs = $(strip $(full_config_sysdirs))
  61
  62 +sysdir_pfx = $(common-objpfx)
  63
  64 export sysdirs := $(sysdirs)
  65
  66 +sysdep_dirs := $(full_config_sysdirs)
  67 ifdef objdir
  68 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
  69 endif
  70
  71 # Add -I switches to get the right sysdep directories.
  72 # `+includes' in Makeconfig references $(+sysdep-includes).
  73 +sysdep-includes := $(addprefix -I,$(+sysdep_dirs))
  74
  75 # This variable is used in ``include $(o-iterator)'' after defining
  76 # $(o-iterator-doit) to produce some desired rule using $o for the object
  77 # suffix, and setting $(object-suffixes-left) to $(object-suffixes); a copy
  78 # is produced for each object suffix in use.
  79 o-iterator = $(patsubst %,$(..)o-iterator.mk,$(object-suffixes-left))
  80 \f
  81 # Include any system-specific makefiles.
  82
  83 # This is here so things in sysdep Makefiles can easily depend on foo.h as
  84 # appropriate and not worry about where foo.h comes from, which may be
  85 # system dependent and not known by that Makefile.
  86 vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
  87                                       $(+sysdep_dirs) $(..)))
  88
  89 # The same is true for RPC source files.
  90 vpath %.x $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
  91                                       $(+sysdep_dirs) $(..)))
  92
  93 # Some sysdep makefiles use this to distinguish being included here from
  94 # being included individually by a subdir makefile (hurd/Makefile needs this).
  95 in-Makerules := yes
  96
  97 sysdep-makefiles := $(wildcard $(full_config_sysdirs:=/Makefile))
  98 ifneq (,$(sysdep-makefiles))
  99 include $(sysdep-makefiles)
 100 endif
 101
 102
 103 # Reorder before-compile so that mach things come first, and hurd things
 104 # second, before all else.  The mach and hurd subdirectories have many
 105 # generated header files which the much of rest of the library depends on,
 106 # so it is best to build them first (and mach before hurd, at that).
 107 before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\
 108                            $(before-compile)) \
 109                   $(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
 110                                $(before-compile))
 111
 112 # Even before that, we need abi-versions.h which is generated right here.
 113 ifeq ($(versioning),yes)
 114 ifndef avoid-generated
 115 before-compile := $(common-objpfx)abi-versions.h $(before-compile)
 116 $(common-objpfx)abi-versions.h: $(..)scripts/abi-versions.awk \
 117                                 $(common-objpfx)Versions.all
 118         LC_ALL=C $(AWK) -v oldest_abi=$(oldest-abi) -f $^ > $@T
 119         mv -f $@T $@
 120
 121 $(common-objpfx)%.latest: $(common-objpfx)abi-versions.h
 122         sed -n '/ VERSION_$*_/{s/^.*_\([A-Z0-9_]*\).*$$/\1/;h;};$${g;p;}' \
 123             $(common-objpfx)abi-versions.h > $@T
 124         mv -f $@T $@
 125 endif # avoid-generated
 126 endif # $(versioning) = yes
 127
 128 # Make sure the subdirectory for object files gets created.
 129 ifdef objpfx
 130 ifeq (,$(wildcard $(objpfx).))
 131 before-compile += $(objpfx).
 132 $(objpfx).:
 133         $(make-target-directory)
 134 endif
 135 endif
 136
 137 # Remove existing files from `before-compile'.  Things are added there when
 138 # they must exist for dependency generation to work right, but once they
 139 # exist there is no further need for every single file to depend on them,
 140 # and those gratuitous dependencies result in many gratuitous
 141 # recompilations.
 142 before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
 143
 144 # Don't let any before-compile file be an intermediate and get removed.
 145 ifdef before-compile
 146 $(before-compile):
 147 endif
 148
 149 # We don't want $(common-objpfx) files to depend on miscellaneous stuff
 150 # in subdirs.
 151 ifdef subdir
 152 common-before-compile := $(filter-out $(objpfx)%,$(before-compile))
 153 else
 154 common-before-compile = $(before-compile)
 155 endif
 156
 157 ifndef subdir
 158 # If a makefile needs to do something conditional on something that
 159 # can only be figured out from headers, write a FOO.make.c input
 160 # file that uses cpp contructs and contains @@@ LINE @@@ for each LINE
 161 # to emit in the generated makefile, and use -include $(common-objpfx)FOO.make.
 162 #
 163 # We only generate these in the top-level makefile, to avoid any weirdness
 164 # from subdir-specific makefile tweaks creeping in on an update.
 165 $(common-objpfx)%.make: $(..)%.make.c $(..)Makerules $(common-before-compile)
 166         rm -f $@T $@.dT
 167         (echo '# Generated from $*.make.c by Makerules.'; \
 168          $(CC) $(CFLAGS) $(CPPFLAGS) -E $< \
 169                -MD -MP -MT '$$(common-objpfx)$*.make' -MF $@.dT \
 170          | sed -n '/@@@/{s/@@@[  ]*\(.*\)@@@/\1/;s/[     ]*$$//p;}'; \
 171          echo 'common-generated += $(@F)'; \
 172          sed $(sed-remove-objpfx) $(sed-remove-dotdot) $@.dT; \
 173          rm -f $@.dT) > $@T
 174         mv -f $@T $@
 175 endif
 176
 177 ifdef subdir
 178 sed-remove-dotdot := -e 's@  *\.\.\/\([^        \]*\)@ $$(..)\1@g' \
 179                      -e 's@^\.\.\/\([^  \]*\)@$$(..)\1@g'
 180 else
 181 sed-remove-dotdot := -e 's@  *\([^      \/$$][^         \]*\)@ $$(..)\1@g' \
 182                      -e 's@^\([^        \/$$][^         \]*\)@$$(..)\1@g'
 183 endif
 184
 185
 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@@@.*$$/#define \1 \2/p' \
 195                 $(@:.h.d=.h)T3 > $(@:.h.d=.h)T
 196         rm -f $(@:.h.d=.h)T3
 197         sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
 198             $(@:.h=.h.d)T > $(@:.h=.h.d)T2
 199         rm -f $(@:.h=.h.d)T
 200         mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d)
 201         mv -f $(@:.h.d=.h)T $(@:.h.d=.h)
 202 vpath %.sym $(sysdirs)
 203 before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 204 \f
 205 # Generate an ordered list of implicit rules which find the source files in
 206 # each sysdep directory.  The old method was to use vpath to search all the
 207 # sysdep directories.  However, that had the problem that a .S file in a
 208 # later directory would be chosen over a .c file in an earlier directory,
 209 # which does not preserve the desired sysdeps ordering behavior.
 210
 211 # It matters that this set of rules, for compiling from sources in
 212 # the current directory (the $srcdir/$subdir) come before the
 213 # generated sysdep rules in included from sysd-rules below.  When
 214 # compiling in the source tree, generated sources go into the current
 215 # directory, and those should be chosen before any sources in sysdeps.
 216 define o-iterator-doit
 217 $(objpfx)%$o: %.S $(before-compile); $$(compile-command.S)
 218 endef
 219 object-suffixes-left := $(all-object-suffixes)
 220 include $(o-iterator)
 221
 222 define o-iterator-doit
 223 $(objpfx)%$o: %.s $(before-compile); $$(compile-command.s)
 224 endef
 225 object-suffixes-left := $(all-object-suffixes)
 226 include $(o-iterator)
 227
 228 define o-iterator-doit
 229 $(objpfx)%$o: %.c $(before-compile); $$(compile-command.c)
 230 endef
 231 object-suffixes-left := $(all-object-suffixes)
 232 include $(o-iterator)
 233
 234 # Omit the objpfx rules when building in the source tree, because
 235 # objpfx is empty and so these rules just override the ones above.
 236 ifdef objpfx
 237 # Define first rules to find the source files in $(objpfx).
 238 # Generated source files will end up there.
 239 define o-iterator-doit
 240 $(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S)
 241 endef
 242 object-suffixes-left := $(all-object-suffixes)
 243 include $(o-iterator)
 244
 245 define o-iterator-doit
 246 $(objpfx)%$o: $(objpfx)%.s $(before-compile); $$(compile-command.s)
 247 endef
 248 object-suffixes-left := $(all-object-suffixes)
 249 include $(o-iterator)
 250
 251 define o-iterator-doit
 252 $(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
 253 endef
 254 object-suffixes-left := $(all-object-suffixes)
 255 include $(o-iterator)
 256 endif
 257
 258 # System-dependent makefiles can put in `inhibit-sysdep-asm' wildcard
 259 # patterns matching sysdep directories whose assembly source files should
 260 # be suppressed.
 261 ifdef inhibit-sysdep-asm
 262 define open-check-inhibit-asm
 263 case $$sysdir in $(subst $(empty) ,|,$(inhibit-sysdep-asm))) : ;; *)
 264 endef
 265 close-check-inhibit-asm = ;; esac ;
 266 endif
 267
 268 -include $(+sysdir_pfx)sysd-rules
 269 ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
 270 # The value of $(+sysdep_dirs) the sysd-rules was computed for
 271 # differs from the one we are using now.  So force a rebuild of sysd-rules.
 272 sysd-rules-force = FORCE
 273 FORCE:
 274 endif
 275 $(+sysdir_pfx)sysd-rules: $(+sysdir_pfx)config.make $(..)Makerules \
 276                           $(wildcard $(foreach dir,$(sysdirs),\
 277                                                $(dir)/Makefile))\
 278                           $(sysd-rules-force)
 279         -@rm -f $@T
 280         (echo 'sysd-rules-sysdirs := $(config-sysdirs)';                      \
 281          for dir in $(config-sysdirs:%='$$(..)%'); do                         \
 282            for o in $(all-object-suffixes); do \
 283              $(open-check-inhibit-asm) \
 284              echo "\$$(objpfx)%$$o: $$dir/%.S \$$(before-compile); \
 285                   \$$(compile-command.S)";                                    \
 286              echo "\$$(objpfx)%$$o: $$dir/%.s \$$(before-compile); \
 287                   \$$(compile-command.s)";                                    \
 288              echo "\$$(objpfx)rtld-%$$o: $$dir/%.S \$$(before-compile); \
 289                   \$$(compile-command.S)";                                    \
 290              echo "\$$(objpfx)rtld-%$$o: $$dir/%.s \$$(before-compile); \
 291                   \$$(compile-command.s)";                                    \
 292              echo "\$$(objpfx)ptw-%$$o: $$dir/%.S \$$(before-compile); \
 293                   \$$(compile-command.S)";                                    \
 294              echo "\$$(objpfx)ptw-%$$o: $$dir/%.s \$$(before-compile); \
 295                   \$$(compile-command.s)";                                    \
 296              $(close-check-inhibit-asm) \
 297              echo "\$$(objpfx)%$$o: $$dir/%.c \$$(before-compile); \
 298                   \$$(compile-command.c)";                                    \
 299              echo "\$$(objpfx)rtld-%$$o: $$dir/%.c \$$(before-compile); \
 300                   \$$(compile-command.c)";                                    \
 301              echo "\$$(objpfx)ptw-%$$o: $$dir/%.c \$$(before-compile); \
 302                   \$$(compile-command.c)";                                    \
 303            done; \
 304            echo "\$$(objpfx)m_%.S: $$dir/s_%.S; \$$(+make-include-of-dep)";   \
 305            echo "\$$(objpfx)m_%.c: $$dir/s_%.c; \$$(+make-include-of-dep)";   \
 306          done;                                                                \
 307          echo 'sysd-rules-done = t') > $@T
 308         mv -f $@T $@
 309
 310 ifndef sysd-rules-done
 311 # Don't do deps until this exists, because it provides rules to make the deps.
 312 no_deps=t
 313 endif
 314
 315 # This is used by the m_%.[Sc] pattern rules in sysd-rules.
 316 define +make-include-of-dep
 317 echo '#include <$<>' > $@T
 318 mv -f $@T $@
 319 endef
 320
 321 # Generate version maps, but wait until sysdep-subdirs is known
 322 ifeq ($(sysd-sorted-done),t)
 323 ifeq ($(versioning),yes)
 324 -include $(common-objpfx)sysd-versions
 325 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
 326 common-generated += $(version-maps)
 327 postclean-generated += sysd-versions Versions.all abi-versions.h \
 328                        Versions.def.v.i Versions.def.v Versions.v.i Versions.v
 329
 330 ifndef avoid-generated
 331 ifneq ($(sysd-versions-subdirs),$(all-subdirs) $(config-sysdirs))
 332 sysd-versions-force = FORCE
 333 FORCE:
 334 endif
 335 # See %.v/%.v.i implicit rules in Makeconfig.
 336 $(common-objpfx)Versions.def.v.i: $(..)Versions.def \
 337                                   $(wildcard $(add-ons:%=$(..)%/Versions.def))
 338 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
 339                               $(common-objpfx)soversions.i \
 340                               $(common-objpfx)Versions.def.v
 341         { while read which lib version setname; do \
 342             test x"$$which" = xDEFAULT || continue; \
 343             test -z "$$setname" || echo "$$lib : $$setname"; \
 344           done < $(word 2,$^); \
 345           cat $(word 3,$^); \
 346         } | LC_ALL=C $(AWK) -f $< > $@T
 347         mv -f $@T $@
 348 # See %.v/%.v.i implicit rules in Makeconfig.
 349 $(common-objpfx)Versions.v.i: $(wildcard $(all-subdirs:%=$(..)%/Versions)) \
 350                               $(wildcard $(sysdirs:%=%/Versions)) \
 351                               $(common-objpfx)abi-versions.h \
 352                               $(sysd-versions-force)
 353 $(common-objpfx)sysd-versions: $(common-objpfx)Versions.all \
 354                                $(common-objpfx)Versions.v \
 355                                $(..)scripts/versions.awk
 356         ( echo 'sysd-versions-subdirs = $(all-subdirs) $(config-sysdirs)' ; \
 357           cat $(word 2,$^) \
 358           | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
 359                             -v move_if_change='$(move-if-change)' \
 360                             -f $(word 3,$^); \
 361         ) > $@T
 362         mv -f $@T $@
 363 endif # avoid-generated
 364 endif # $(versioning) = yes
 365 endif # sysd-sorted-done
 366
 367 # Generate .dT files as we compile.
 368 compile-mkdep-flags = -MD -MP -MF $@.dt -MT $@
 369 compile-command.S = $(compile.S) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 370 compile-command.s = $(COMPILE.s) $< $(OUTPUT_OPTION) $(compile-mkdep-flags)
 371 compile-command.c = $(compile.c) $(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.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \
 376                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 377 COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \
 378                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 379 COMPILE.s = $(filter-out -pipe,$(CC)) -c $(ASFLAGS)
 380
 381 # We need this for the output to go in the right place.  It will default to
 382 # empty if make was configured to work with a cc that can't grok -c and -o
 383 # together.  You can't compile the C library with such a compiler.
 384 OUTPUT_OPTION = -o $@
 385
 386 # We need the $(CFLAGS) to be in there to have the right predefines during
 387 # the dependency run for C sources.  But having it for assembly sources can
 388 # get the wrong predefines.
 389 S-CPPFLAGS = -DASSEMBLER $(asm-CPPFLAGS)
 390
 391 define +make-deps
 392 $(make-target-directory)
 393 $(+mkdep) $< $(if $(filter %.c,$<),$(CFLAGS)) \
 394              $(CPPFLAGS) $($(patsubst .%,%,$(suffix $(<F)))-CPPFLAGS) | sed -e\
 395 's,$(subst .,\.,$(@F:.d=.o)),$(foreach o,$(all-object-suffixes),$(@:.d=$o)) $@,' \
 396 $(sed-remove-objpfx) $(sed-remove-dotdot) > $(@:.d=.T)
 397 mv -f $(@:.d=.T) $@ $(generate-md5)
 398 endef
 399
 400 ifneq (,$(objpfx))
 401 # Continuation lines here are dangerous because they introduce spaces!
 402 define sed-remove-objpfx
 403 -e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
 404 -e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g'
 405 endef
 406 endif
 407 \f
 408 # Modify the list of routines we build for different targets
 409
 410 ifeq (yesyes,$(build-shared)$(elf))
 411 ifndef libc.so-version
 412 # Undefine this because it can't work when we libc.so is unversioned.
 413 static-only-routines =
 414 endif
 415 endif
 416
 417 # Bounded pointer thunks are only built for *.ob
 418 elide-bp-thunks = $(addprefix $(bppfx),$(bp-thunks))
 419
 420 elide-routines.oS += $(filter-out $(static-only-routines),\
 421                                   $(routines) $(aux) $(sysdep_routines)) \
 422                      $(elide-bp-thunks)
 423 elide-routines.os += $(static-only-routines) $(elide-bp-thunks)
 424
 425 # If we have versioned code we don't need the old versions in any of the
 426 # static libraries.
 427 elide-routines.o  += $(shared-only-routines) $(elide-bp-thunks)
 428 elide-routines.op += $(shared-only-routines) $(elide-bp-thunks)
 429 elide-routines.og += $(shared-only-routines) $(elide-bp-thunks)
 430 elide-routines.ob += $(shared-only-routines)
 431 \f
 432 # Shared library building.
 433
 434 ifeq (yes,$(build-shared))
 435
 436 # Reference map file only when versioning is selected and a map file name
 437 # is given.
 438 ifeq ($(versioning),yes)
 439 map-file = $(firstword $($(@F:.so=-map)) \
 440                        $(addprefix $(common-objpfx), \
 441                                    $(filter $(@F:.so=.map),$(version-maps))))
 442 load-map-file = $(map-file:%=-Wl,--version-script=%)
 443 endif
 444
 445 # Pattern rule to build a shared object from an archive of PIC objects.
 446 # This must come after the installation rules so Make doesn't try to
 447 # build shared libraries in place from the installed *_pic.a files.
 448 # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
 449 # on other shared objects.
 450 lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(+interp)
 451 ifneq (,$(findstring aix,$(config-os)))
 452         (echo '#!'; \
 453          dump -g $< | sed '1,6d' | cut -f2 | sort | uniq) > $(<:a=exp)
 454 endif
 455         $(build-shlib)
 456
 457 ifeq ($(elf),yes)
 458 define build-shlib-helper
 459 $(LINK.o) -shared $(static-libgcc) -Wl,-O1 $(sysdep-LDFLAGS) \
 460           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) $(config-LDFLAGS) \
 461           $(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \
 462           $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
 463           -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
 464           $(LDFLAGS.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
 465           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 466 endef
 467 else
 468 ifneq (,$(findstring aix,$(config-os)))
 469 define build-shlib-helper
 470 $(LINK.o) -Wl,-G,-bM:SRE,-bnoentry,-bE:$(<:a=exp) \
 471           $(sysdep-LDFLAGS) $(config-LDFLAGS) $(extra-B-$(@F:lib%.so=%).so) \
 472           $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
 473           $(LDFLAGS.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
 474           -L$(subst :, -L,$(rpath-link))
 475 endef
 476 else
 477 endif
 478 endif
 479
 480 ifeq (yes,$(elf))
 481 # binutils only position loadable notes into the first page for binaries,
 482 # not for shared objects
 483 $(common-objpfx)shlib.lds: $(common-objpfx)config.make $(..)Makerules
 484         $(LINK.o) -shared -Wl,-O1 \
 485                   -nostdlib -nostartfiles \
 486                   $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS.so) \
 487                   -Wl,--verbose 2>&1 | \
 488           sed > $@T \
 489               -e '/^=========/,/^=========/!d;/^=========/d' \
 490               -e 's/^.*\.hash[  ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 491               -e 's/^.*\*(\.dynbss).*$$/& \
 492                  PROVIDE(__start___libc_freeres_ptrs = .); \
 493                  *(__libc_freeres_ptrs) \
 494                  PROVIDE(__stop___libc_freeres_ptrs = .);/'\
 495               -e 's@^.*\*(\.jcr).*$$@& \
 496                  PROVIDE(__start___libc_subfreeres = .);\
 497                  __libc_subfreeres : { *(__libc_subfreeres) }\
 498                  PROVIDE(__stop___libc_subfreeres = .);\
 499                  PROVIDE(__start___libc_atexit = .);\
 500                  __libc_atexit : { *(__libc_atexit) }\
 501                  PROVIDE(__stop___libc_atexit = .);\
 502                  PROVIDE(__start___libc_thread_subfreeres = .);\
 503                  __libc_thread_subfreeres : { *(__libc_thread_subfreeres) }\
 504                  PROVIDE(__stop___libc_thread_subfreeres = .);\
 505                  /DISCARD/ : { *(.gnu.glibc-stub.*) }@'
 506         mv -f $@T $@
 507 common-generated += shlib.lds
 508
 509 define build-shlib
 510 $(build-shlib-helper) -o $@ -T $(common-objpfx)shlib.lds \
 511           $(csu-objpfx)abi-note.o $(build-shlib-objlist)
 512 endef
 513 else
 514 ifneq (,$(findstring aix,$(config-os)))
 515 define build-shlib
 516 $(build-shlib-helper) \
 517         -o $@ \
 518         $(filter-out $(map-file) $(+preinit) $(+postinit),$^) \
 519         $(no-whole-archive) $(LDLIBS-$(@F:lib%.so=%).so)
 520 endef
 521 define build-shlib
 522 $(build-shlib-helper) \
 523           $(build-shlib-objlist)
 524 endef
 525 endif
 526 endif
 527
 528 ifneq (,$(findstring aix,$(config-os)))
 529 define build-module-helper
 530 $(LINK.o) -Wl,-G -Wl,-bM:SRE -Wl,-bnoentry -Wl,-bexpall \
 531           $(sysdep-LDFLAGS) $(config-LDFLAGS) \
 532           $(load-map-file) \
 533           $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
 534           -L$(subst :, -L,$(rpath-link)) -Wl,-L=$(rpath-link)
 535 endef
 536 else
 537 define build-module-helper
 538 $(LINK.o) -shared $(static-libgcc) $(sysdep-LDFLAGS) $(config-LDFLAGS) \
 539           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
 540           -B$(csu-objpfx) $(load-map-file) \
 541           $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
 542           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 543 endef
 544 endif
 545
 546 # This macro is similar to build-shlib but it does not define a soname
 547 # and it does not depend on the destination name to start with `lib'.
 548 ifeq (yes,$(elf))
 549 # binutils only position loadable notes into the first page for binaries,
 550 # not for shared objects
 551 define build-module
 552 $(build-module-helper) -o $@ -T $(common-objpfx)shlib.lds \
 553           $(csu-objpfx)abi-note.o $(build-module-objlist)
 554 endef
 555 else
 556 ifneq (,$(findstring aix,$(config-os)))
 557 define build-module
 558 $(build-module-helper) \
 559           -o $@ \
 560           $(filter-out $(map-file) $(+preinit) $(+postinit),$^) \
 561           $(no-whole-archive) $(LDLIBS-$(@F:%.so=%).so)
 562 endef
 563 else
 564 define build-module
 565 define build-module
 566 $(build-module-helper) \
 567           -o $@ \
 568           $(build-module-objlist)
 569 endef
 570 endif
 571 endif
 572
 573 build-module-helper-objlist = \
 574         $(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\
 575                    $(filter-out %.lds $(map-file) $(+preinit) $(+postinit),$^))
 576 whole-archive := -Wl,--whole-archive
 577
 578 build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so)
 579 build-shlib-objlist = $(build-module-helper-objlist) \
 580                       $(LDLIBS-$(@F:lib%.so=%).so)
 581
 582 # Don't try to use -lc when making libc.so itself.
 583 # Also omits crti.o and crtn.o, which we do not want
 584 # since we define our own `.init' section specially.
 585 LDFLAGS-c.so = -nostdlib -nostartfiles
 586 # But we still want to link libc.so against $(libc.so-gnulib).
 587 LDLIBS-c.so += $(libc.so-gnulib)
 588 # Give libc.so an entry point and make it directly runnable itself.
 589 LDFLAGS-c.so += -e __libc_main
 590 # If lazy relocation is disabled add the -z now flag.
 591 ifeq ($(bind-now),yes)
 592 LDFLAGS-c.so += -Wl,-z,now
 593 endif
 594 # Pre-link the objects of libc_pic.a so that we can locally resolve
 595 # COMMON symbols before we link against ld.so.  This is because ld.so
 596 # contains some of libc_pic.a already, which will prevent the COMMONs
 597 # from being allocated in libc.so, which introduces evil dependencies
 598 # between libc.so and ld.so, which can make it impossible to upgrade.
 599 ifeq ($(elf),yes)
 600 $(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
 601         $(LINK.o) -nostdlib -nostartfiles -r -o $@ \
 602         $(LDFLAGS-c_pic.os) -Wl,-d -Wl,--whole-archive $^
 603 # Use our own special initializer and finalizer files for libc.so.
 604 $(common-objpfx)libc.so: $(elfobjdir)/soinit.os \
 605                          $(common-objpfx)libc_pic.os \
 606                          $(elfobjdir)/sofini.os \
 607                          $(elfobjdir)/interp.os $(elfobjdir)/ld.so \
 608                          $(common-objpfx)shlib.lds
 609         $(build-shlib)
 610 ifeq ($(versioning),yes)
 611 $(common-objpfx)libc.so: $(common-objpfx)libc.map
 612 endif
 613 common-generated += libc.so libc_pic.os
 614 ifdef libc.so-version
 615 $(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
 616         $(make-link)
 617 common-generated += libc.so$(libc.so-version)
 618 endif
 619 endif
 620 else
 621 ifneq (,$(findstring aix,$(config-os)))
 622 $(common-objpfx)libc.so: $(common-objpfx)libc_pic.a
 623         @rm -f $@
 624         (echo '#!'; \
 625          dump -g $^ | sed '1,6d' | cut -f2 | sort | uniq) > $(^:a=exp)
 626         sed '/__mulh/d;/__mull/d;/__divss/d;/__divus/d;/__quoss/d;/__quous/d' \
 627             /lib/syscalls.exp > $(common-objpfx)syscalls.exp
 628         $(LINK.o) -G -bM:SRE -bnoentry -bE:$(^:a=exp) \
 629                   -bE:$(common-objpfx)syscalls.exp \
 630                   -bI:$(common-objpfx)syscalls.exp \
 631                   -L$(common-objpfx) -o $@ $^
 632 # AIX runtime ld wants libc.so to be libc.a(shr.o) hardwired
 633         cp $@ $(common-objpfx)shr.o
 634         $(AR) $(ARFLAGS) $(common-objpfx)libc.a $(common-objpfx)shr.o
 635 endif
 636 endif
 637 \f
 638 # Figure out the source filenames in this directory.
 639
 640 override sources := $(addsuffix .c,\
 641                         $(filter-out $(elided-routines),\
 642                             $(routines) $(aux) \
 643                             $(sysdep_routines)))
 644 sysdep_routines := $(sysdep_routines)
 645
 646 headers := $(headers) $(sysdep_headers)
 647
 648 # This is the list of all object files, gotten by
 649 # replacing every ".c" in `sources' with a ".o".
 650 # We also add bounded-pointer thunks, which are later
 651 # elided for all suffixes except for `.ob'.
 652 override objects := $(addprefix $(objpfx),$(sources:.c=.o) \
 653                       $(patsubst %,$(bppfx)%.o,\
 654                         $(filter $(routines) $(sysdep_routines),$(bp-thunks))))
 655
 656
 657 # The makefile may define $(extra-libs) with `libfoo libbar'
 658 # to build libfoo.a et al from the modules listed in $(libfoo-routines).
 659 ifdef extra-libs
 660 # extra-lib.mk is included once for each extra lib to define rules
 661 # to build it, and to add its objects to the various variables.
 662 # During its evaluation, $(lib) is set to the name of the library.
 663 extra-libs-left := $(extra-libs)
 664 include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
 665 endif
 666
 667
 668 # The makefile may define $(modules-names) to build additional modules.
 669 # These are built with $(build-module), except any in $(modules-names-nobuild).
 670 ifdef modules-names
 671 # extra-lib.mk is included once for each extra lib to define rules
 672 # to build it, and to add its objects to the various variables.
 673 # During its evaluation, $(lib) is set to the name of the library.
 674 extra-modules-left := $(modules-names)
 675 include $(patsubst %,$(..)extra-modules.mk,$(modules-names))
 676
 677 extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names))
 678 $(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \
 679                 $(objpfx)$(module).os $(common-objpfx)shlib.lds \
 680                 $(common-objpfx)libc.so $(common-objpfx)libc_nonshared.a
 681         $(build-module)
 682 endif
 683 \f
 684 +depfiles := $(sources:.c=.d) \
 685              $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \
 686              $(addsuffix .d,$(tests) $(xtests) $(test-srcs))
 687 ifeq ($(build-programs),yes)
 688 +depfiles += $(addsuffix .d,$(others) $(sysdep-others))
 689 endif
 690 +depfiles := $(addprefix $(objpfx),\
 691                          $(filter-out $(addsuffix .d,$(omit-deps)),\
 692                                       $(+depfiles)))
 693 all-dt-files := $(foreach o,$(object-suffixes-for-libc),$(+depfiles:.d=$o.dt))
 694 +depfiles := $(patsubst %.dt,%.d,$(wildcard $(all-dt-files))) \
 695              $(wildcard $(all-dt-files:.dt=.d))
 696
 697 # This is a funny rule in that it removes its input file.
 698 %.d: %.dt
 699         @sed $(sed-remove-objpfx) $< > $(@:.d=.T) && \
 700          mv -f $(@:.d=.T) $@ && \
 701          rm -f $<
 702
 703 # Avoid the .h.d files for any .sym files whose .h files don't exist yet.
 704 # They will be generated when they're needed, and trying too early won't work.
 705 +gen-as-const := $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 706 +depfiles += $(addsuffix .d,$(filter $(wildcard $(+gen-as-const)),\
 707                                                 $(+gen-as-const)))
 708
 709 ifdef +depfiles
 710 ifneq ($(no_deps),t)
 711 -include $(+depfiles)
 712 endif
 713 endif
 714 \f\f
 715 # Maximize efficiency by minimizing the number of rules.
 716 .SUFFIXES:      # Clear the suffix list.  We don't use suffix rules.
 717 # Don't define any builtin rules.
 718 MAKEFLAGS := $(MAKEFLAGS)r
 719
 720 # Generic rule for making directories.
 721 %/:
 722 # mkdir isn't smart enough to strip a trailing /.
 723         mkdir $(@:%/=%)
 724 \f
 725 # Make sure that object files are not removed
 726 # when they are intermediates between sources and library members.
 727 .PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes))
 728
 729 # Make sure that the parent library archive is never removed.
 730 .PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 731 \f
 732 # Use the verbose option of ar and tar when not running silently.
 733 ifeq    "$(findstring s,$(MAKEFLAGS))" ""       # if not -s
 734 verbose := v
 735 else                                            # -s
 736 verbose :=
 737 endif                                           # not -s
 738
 739 ARFLAGS := r$(verbose)
 740 CREATE_ARFLAGS := cru$(verbose)
 741 \f
 742 # This makes all the object files in the parent library archive.
 743
 744 .PHONY: lib lib-noranlib
 745 lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 746 lib-noranlib: libobjs
 747
 748 # For object-suffix $o, the list of objects with that suffix.
 749 # Makefiles can define `elide-routines.so = foo' to leave foo.so out.
 750 o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
 751                                                        $(elide-routines$o)),\
 752                                             $(objects))) \
 753             $(addprefix $(objpfx),$(o-objects$o))
 754
 755 others: $(addprefix $(objpfx),$(install-lib))
 756
 757 ifndef objects
 758
 759 # Create the stamp$o files to keep the parent makefile happy.
 760 subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 761 $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o):
 762         $(make-target-directory)
 763         rm -f $@; > $@
 764 else
 765
 766 # Define explicit rules to update each $(objpfx)stamp.SUFFIX
 767 # timestamp file; these rules (one explicit rule is generated for each
 768 # object suffix) write a list of objects to update in the stamp file.
 769 # The parent will then actually add them all to the archive in the
 770 # archive rule, below.
 771 define o-iterator-doit
 772 $(objpfx)stamp$o: $(o-objects); $$(do-stamp)
 773 endef
 774 define do-stamp
 775 $(make-target-directory)
 776 echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T
 777 mv -f $@T $@
 778 endef
 779 object-suffixes-left := $(object-suffixes-for-libc)
 780 include $(o-iterator)
 781
 782 endif
 783
 784 # Now define explicit rules to build the library archives; these depend
 785 # on the stamp files built above.
 786 define o-iterator-doit
 787 $(common-objpfx)$(patsubst %,$(libtype$o),c): \
 788                 $(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib)
 789 endef
 790 define do-makelib
 791 cd $(common-objdir) && \
 792 $(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)`
 793 $(RANLIB) $@
 794 endef
 795 subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%)
 796 subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
 797 ifndef subdir
 798 $(subdirs-stamps): subdir_lib;
 799 endif
 800 object-suffixes-left = $(object-suffixes-for-libc)
 801 include $(o-iterator)
 802
 803
 804 # This makes all the object files.
 805 .PHONY: objects objs libobjs extra-objs
 806 objects objs: libobjs extra-objs
 807 libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 808 extra-objs: $(addprefix $(objpfx),$(extra-objs))
 809
 810 # Canned sequence for building an extra library archive.
 811 define build-extra-lib
 812 $(patsubst %/,cd % &&,$(objpfx)) \
 813 $(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \
 814       $(patsubst $(objpfx)%,%,$^)
 815 $(RANLIB) $@
 816 endef
 817 \f
 818 # Installation.
 819
 820 .PHONY: force-install
 821 force-install:
 822
 823 # $(install-lib) are installed from the object directory into $(libdir);
 824 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
 825 # unless they also appear in $(non-lib.a).  $(install-data) are installed
 826 # as they are into $(datadir).  $(headers) are installed as they are in
 827 # $(includedir).  $(install-bin), $(install-bin-script) and $(install-sbin)
 828 # are installed from the object directory into $(bindir), $(bindir) and
 829 # $(sbindir), respectively.  $(install-others) are absolute path names of
 830 # files to install; rules to install them are defined elsewhere.
 831
 832 # The simple library name to install libc.a under.
 833 # This could be defined by a sysdep Makefile.
 834 ifndef libc-name
 835 libc-name := c
 836 endif
 837
 838 define do-install
 839 $(make-target-directory)
 840 $(INSTALL_DATA) $< $@
 841 endef
 842
 843 # Make the target directory if it doesn't exist, using the `mkinstalldirs'
 844 # script that does `mkdir -p' even if `mkdir' doesn't support that flag.
 845 define make-target-directory
 846 $(addprefix $(..)./scripts/mkinstalldirs ,\
 847             $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
 848 endef
 849
 850 # Any directory (parent or subdir) should install libc.a; this way
 851 # "make install" in a subdir is guaranteed to install everything it changes.
 852 installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
 853                              $(inst_libdir)/$(patsubst %,$(libtype$o),\
 854                                                      $(libprefix)$(libc-name)))
 855 install: $(installed-libcs)
 856 $(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
 857         $(make-target-directory)
 858         $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
 859 # Running ranlib after installing makes the __.SYMDEF time stamp up to
 860 # date, which avoids messages from some linkers.
 861         $(RANLIB) $@
 862
 863 define do-install-program
 864 $(make-target-directory)
 865 $(INSTALL_PROGRAM) $< $@.new
 866 mv -f $@.new $@
 867 endef
 868
 869 define do-install-script
 870 $(make-target-directory)
 871 $(INSTALL_SCRIPT) $< $@.new
 872 mv -f $@.new $@
 873 endef
 874
 875 install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
 876 install-lib := $(filter-out %.so %_pic.a,$(install-lib))
 877
 878 ifeq (yes,$(build-shared))
 879 # Find which .so's have versions.
 880 versioned := $(strip $(foreach so,$(install-lib.so),\
 881                                $(patsubst %,$(so),$($(so)-version))))
 882
 883 install-lib.so-versioned := $(filter $(versioned), $(install-lib.so))
 884 install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so))
 885
 886 # For versioned libraries, we install three files:
 887 #       $(inst_libdir)/libfoo.so        -- for linking, symlink or ld script
 888 #       $(inst_slibdir)/libfoo.so.NN    -- for loading by SONAME, symlink
 889 #       $(inst_slibdir)/libfoo-X.Y.Z.so -- the real shared object file
 890 V := $(firstword $($(subdir)-version) $(version))
 891 install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \
 892                       $(foreach L,$(install-lib.so-versioned),\
 893                                 $(inst_libdir)/$L \
 894                                 $(inst_slibdir)/$(L:.so=)-$V.so \
 895                                 $(inst_slibdir)/$L$($L-version))
 896
 897 # Install all the unversioned shared libraries.
 898 $(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \
 899     $(objpfx)%.so $(+force)
 900         $(do-install-program)
 901
 902 ifneq ($(findstring -s,$(LN_S)),)
 903 define make-link
 904 rm -f $@.new
 905 $(SHELL) $(..)scripts/rellns-sh $< $@.new
 906 mv -f $@.new $@
 907 endef
 908 else
 909 # If we have no symbolic links don't bother with rellns-sh.
 910 define make-link
 911 rm -f $@.new
 912 $(LN_S) $< $@.new
 913 mv -f $@.new $@
 914 endef
 915 endif
 916
 917 ifeq (yes,$(build-shared))
 918 ifeq (no,$(cross-compiling))
 919 symbolic-link-prog := $(common-objpfx)elf/sln
 920 symbolic-link-list := $(common-objpfx)elf/symlink.list
 921 define make-shlib-link
 922 echo $(<F) $@ >> $(symbolic-link-list)
 923 endef
 924 else # cross-compiling
 925 # We need a definition that can be used by elf/Makefile's install rules.
 926 symbolic-link-prog = $(LN_S)
 927 endif
 928 endif
 929 ifndef make-shlib-link
 930 define make-shlib-link
 931 rm -f $@
 932 $(LN_S) $(<F) $@
 933 endef
 934 endif
 935
 936 ifdef libc.so-version
 937 # For a library specified to be version N, install three files:
 938 # libc.so       ->      libc.so.N       (e.g. libc.so.6)
 939 # libc.so.6     ->      libc-VERSION.so (e.g. libc-1.10.so)
 940
 941 $(inst_slibdir)/libc.so$(libc.so-version): $(inst_slibdir)/libc-$(version).so \
 942                                            $(+force)
 943         $(make-shlib-link)
 944 $(inst_slibdir)/libc-$(version).so: $(common-objpfx)libc.so $(+force)
 945         $(do-install-program)
 946 install: $(inst_slibdir)/libc.so$(libc.so-version)
 947
 948 # This fragment of linker script gives the OUTPUT_FORMAT statement
 949 # for the configuration we are building.  We put this statement into
 950 # the linker scripts we install for -lc et al so that they will not be
 951 # used by a link for a different format on a multi-architecture system.
 952 $(common-objpfx)format.lds: $(..)scripts/output-format.sed \
 953                             $(common-objpfx)config.make \
 954                             $(common-objpfx)config.h $(..)Makerules
 955         $(LINK.o) -shared $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS.so) \
 956                   -x c /dev/null -o $@.so -Wl,--verbose -v 2>&1 \
 957         | sed -n -f $< > $@.new
 958         rm -f $@.so
 959         mv -f $@.new $@
 960 common-generated += format.lds
 961
 962 ifndef subdir
 963 # What we install as libc.so for programs to link against is in fact a
 964 # link script.  It contains references for the various libraries we need.
 965 # The libc.so object is not complete since some functions are only defined
 966 # in libc_nonshared.a.
 967 # We need to use absolute paths since otherwise local copies (if they exist)
 968 # of the files are taken by the linker.
 969 install: $(inst_libdir)/libc.so
 970 $(inst_libdir)/libc.so: $(common-objpfx)format.lds \
 971                         $(common-objpfx)libc.so$(libc.so-version) \
 972                         $(inst_libdir)/$(patsubst %,$(libtype.oS),\
 973                                                   $(libprefix)$(libc-name)) \
 974                         $(+force)
 975         (echo '/* GNU ld script';\
 976          echo '   Use the shared library, but some functions are only in';\
 977          echo '   the static library, so try that secondarily.  */';\
 978          cat $<; \
 979          echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \
 980               '$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\
 981               ' AS_NEEDED (' $(slibdir)/$(rtld-installed-name) ') )' \
 982         ) > $@.new
 983         mv -f $@.new $@
 984
 985 endif
 986
 987 else
 988 install: $(inst_slibdir)/libc.so
 989 $(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force)
 990         $(do-install-program)
 991 endif
 992
 993 ifneq (,$(versioned))
 994 # Produce three sets of rules as above for all the smaller versioned libraries.
 995
 996 define o-iterator-doit
 997 $(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link)
 998 endef
 999 object-suffixes-left := $(filter-out $(install-lib-ldscripts),$(versioned))
1000 ifneq (,$(object-suffixes-left))
1001 include $(o-iterator)
1002 endif
1003
1004 # Make symlinks in the build directory, because the versioned names might
1005 # be referenced by a DT_NEEDED in another library.
1006 define o-iterator-doit
1007 $(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
1008 endef
1009 object-suffixes-left := $(versioned)
1010 include $(o-iterator)
1011
1012 generated += $(foreach o,$(versioned),$o$($o-version))
1013
1014 ifeq (,$($(subdir)-version))
1015 define o-iterator-doit
1016 $(inst_slibdir)/$o$($o-version): $(inst_slibdir)/$(o:.so=)-$(version).so \
1017                                  $(+force);
1018         $$(make-shlib-link)
1019 endef
1020 object-suffixes-left := $(versioned)
1021 include $(o-iterator)
1022
1023 define o-iterator-doit
1024 $(inst_slibdir)/$(o:.so=)-$(version).so: $(objpfx)$o $(+force);
1025         $$(do-install-program)
1026 endef
1027 object-suffixes-left := $(versioned)
1028 include $(o-iterator)
1029 else
1030 define o-iterator-doit
1031 $(inst_slibdir)/$o$($o-version): \
1032   $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so $(+force);
1033         $$(make-shlib-link)
1034 endef
1035 object-suffixes-left := $(versioned)
1036 include $(o-iterator)
1037
1038 define o-iterator-doit
1039 $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so: $(objpfx)$o $(+force);
1040         $$(do-install-program)
1041 endef
1042 object-suffixes-left := $(versioned)
1043 include $(o-iterator)
1044 endif
1045 endif
1046
1047 define do-install-so
1048 $(do-install-program)
1049 $(patsubst %,ln -s -f $(@F) $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
1050            $(filter-out %.so,$@))
1051 endef
1052
1053 so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
1054 $(foreach v,$(so-versions),\
1055           $(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \
1056                                                $(+force)
1057         $(do-install-so)
1058 $(foreach v,$(so-versions),\
1059           $(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force)
1060         $(do-install-so)
1061 endif
1062
1063 ifdef install-bin
1064 $(addprefix $(inst_bindir)/,$(install-bin)): \
1065     $(inst_bindir)/%: $(objpfx)% $(+force)
1066         $(do-install-program)
1067 endif
1068 ifdef install-bin-script
1069 $(addprefix $(inst_bindir)/,$(install-bin-script)): \
1070     $(inst_bindir)/%: $(objpfx)% $(+force)
1071         $(do-install-script)
1072 endif
1073 ifdef install-rootsbin
1074 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \
1075    $(inst_rootsbindir)/%: $(objpfx)% $(+force)
1076         $(do-install-program)
1077 endif
1078 ifdef install-sbin
1079 $(addprefix $(inst_sbindir)/,$(install-sbin)): \
1080     $(inst_sbindir)/%: $(objpfx)% $(+force)
1081         $(do-install-program)
1082 endif
1083 ifdef install-lib
1084 install-lib.a := $(filter lib%.a,$(install-lib))
1085 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
1086 ifdef install-lib-non.a
1087 $(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
1088   $(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force)
1089         $(do-install)
1090 endif
1091 ifdef install-lib.a
1092 $(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \
1093   $(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force)
1094         $(do-install)
1095         $(patsubst %,$(RANLIB) $@,$(filter-out $(non-lib.a),$(<F)))
1096 endif
1097 endif
1098 ifdef install-data
1099 $(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force)
1100         $(do-install)
1101 endif
1102 headers := $(strip $(headers))
1103 ifdef headers
1104 $(addprefix $(inst_includedir)/,$(headers)): $(inst_includedir)/%: % $(+force)
1105         $(do-install)
1106 endif   # headers
1107
1108 .PHONY: install-bin-nosubdir install-bin-script-nosubdir \
1109         install-rootsbin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
1110         install-data-nosubdir install-headers-nosubdir
1111 install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin))
1112 install-bin-script-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin-script))
1113 install-rootsbin-nosubdir: \
1114         $(addprefix $(inst_rootsbindir)/,$(install-rootsbin))
1115 install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin))
1116 install-lib-nosubdir: $(addprefix $(inst_libdir)/,\
1117                        $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
1118                        $(addprefix $(libprefix),$(install-lib-non.a)))
1119 install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data))
1120 install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers))
1121 install-others-nosubdir: $(install-others)
1122
1123 # We need all the `-nosubdir' targets so that `install' in the parent
1124 # doesn't depend on several things which each iterate over the subdirs.
1125 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
1126 # subroutine.  Then in the parent `install-FOO' also causes subdir makes.
1127 install-%:: install-%-nosubdir ;
1128
1129 .PHONY: install install-no-libc.a-nosubdir
1130 ifeq ($(build-programs),yes)
1131 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir\
1132                             install-bin-nosubdir install-bin-script-nosubdir \
1133                             install-lib-nosubdir install-others-nosubdir \
1134                             install-rootsbin-nosubdir install-sbin-nosubdir
1135 else
1136 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir\
1137                             install-lib-nosubdir install-others-nosubdir
1138 endif
1139 install: install-no-libc.a-nosubdir
1140 \f
1141 # Command to compile $< in $(objdir) using the native libraries.
1142 define native-compile
1143 $(make-target-directory)
1144 $(patsubst %/,cd % &&,$(objpfx)) \
1145 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
1146             $(firstword $(filter /%,$< $(shell pwd)/$<)) -o $(@F)
1147 endef
1148
1149 # Command to compile $< in $(common-objdir) using the native libraries.
1150 # We must cd to $(objdir) anyway so that $(..)config.h is valid.
1151 define common-objdir-compile
1152 $(patsubst %/,cd % &&,$(objpfx)) \
1153 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
1154             $(firstword $(filter /%,$< $(shell pwd)/$<)) -o $(..)$(@F)
1155 endef
1156
1157 # We always want to use configuration definitions.
1158 # Note that this is only used for commands running in $(objpfx).
1159 ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) -include $(..)config.h
1160
1161 # Support the GNU standard name for this target.
1162 .PHONY: check
1163 check: tests
1164 # Special target to run tests which cannot be run unconditionally.
1165 # Maintainers should use this target.
1166 .PHONY: xcheck
1167 xcheck: xtests
1168
1169 all-nonlib = $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) $(others))
1170 ifneq (,$(all-nonlib))
1171 cpp-srcs-left = $(all-nonlib:=.c)
1172 lib := nonlib
1173 include $(patsubst %,$(..)cppflags-iterator.mk,$(all-nonlib))
1174 endif
1175
1176 # The include magic above causes those files to use this variable for flags.
1177 CPPFLAGS-nonlib = -DNOT_IN_libc=1
1178
1179
1180 ifeq ($(versioning),yes)
1181 # Generate normalized lists of symbols, versions, and data sizes.
1182 # This is handy for checking against existing library binaries.
1183
1184 %.symlist: $(..)scripts/abilist.awk %.dynsym
1185         LC_ALL=C $(AWK) -f $^ > $@T
1186         mv -f $@T $@
1187
1188 %.dynsym: %.so
1189         $(OBJDUMP) --dynamic-syms $< > $@T
1190         mv -f $@T $@
1191
1192 check-abi-%: $(..)scripts/extract-abilist.awk $(common-objpfx)config.make \
1193              $(..)abilist/%.abilist $(objpfx)%.symlist
1194         $(check-abi)
1195 check-abi-%: $(..)scripts/extract-abilist.awk $(common-objpfx)config.make \
1196              $(..)abilist/%.abilist $(common-objpfx)%.symlist
1197         $(check-abi)
1198 define check-abi
1199         LC_ALL=C \
1200         $(AWK) -f $< -v 'config=$(check-abi-config)' \
1201                $(patsubst %,-v 'lastversion=%',$($*-abi-frozen)) \
1202                $(filter %.abilist,$^) \
1203         | { diff -p -U 0 - $(filter %.symlist,$^) $(check-abi-warn) ; }
1204 endef
1205 ifeq ($(enable-check-abi),warn)
1206 check-abi-warn = || echo '*** WARNING: $*.so failed ABI check'
1207 endif
1208
1209 ifeq ($(firstword $(sysd-sorted-done) f)$(firstword $(generating) f),tf)
1210 -include $(common-objpfx)tls.make
1211 config-tls := notls
1212 ifeq ($(use-tls),yes)
1213 config-tls := tls
1214 endif
1215 ifeq ($(use-thread),yes)
1216 config-tls := thread
1217 endif
1218 check-abi-config := \
1219   $(config-machine)-$(config-vendor)-$(config-os)/$(config-tls)
1220 endif
1221
1222 update-abi-%: $(..)scripts/merge-abilist.awk $(..)abilist/%.abilist \
1223               $(objpfx)%.symlist
1224         $(update-abi)
1225 update-abi-%: $(..)scripts/merge-abilist.awk $(..)abilist/%.abilist \
1226               $(common-objpfx)%.symlist
1227         $(update-abi)
1228 ifndef update-abi-config
1229 define update-abi
1230         @echo 'Run $(MAKE) $@ update-abi-config=REGEXP'; exit 2
1231 endef
1232 else
1233 define update-abi
1234 LC_ALL=C $(AWK) -v config='$(update-abi-config)' -f $^ \
1235          > $(..)abilist/$*.abilist.new
1236 @if cmp -s $(..)abilist/$*.abilist.new $(..)abilist/$*.abilist 2> /dev/null; \
1237  then rm -f $(..)abilist/$*.abilist.new; \
1238       echo '+++ $(..)abilist/$*.abilist is unchanged'; \
1239  else mv -f $(..)abilist/$*.abilist.new $(..)abilist/$*.abilist; \
1240       echo '*** Now check $*.abilist changes for correctness ***'; \
1241  fi
1242 endef
1243 endif
1244
1245 .PHONY: update-abi check-abi
1246 update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned))
1247 check-abi: $(patsubst %.so,check-abi-%,$(install-lib.so-versioned))
1248 ifdef subdir
1249 subdir_check-abi: check-abi
1250 subdir_update-abi: update-abi
1251 else
1252 check-abi: subdir_check-abi
1253 update-abi: subdir_update-abi
1254 endif
1255
1256 ifeq ($(subdir),elf)
1257 check-abi: check-abi-libc
1258 update-abi: update-abi-libc
1259 common-generated += libc.symlist
1260 endif
1261
1262 ifeq ($(build-shared),yes)
1263 ifneq ($(enable-check-abi),no)
1264 ifdef subdir
1265 tests: check-abi
1266 endif
1267 endif
1268 endif
1269
1270 endif
1271
1272 # There's no good place to put this - here will do.
1273 ifeq ($(filter %posix, $(sysdirs)),)
1274 L_tmpnam  = 1
1275 TMP_MAX   = 0
1276 L_ctermid = 1
1277 L_cuserid = 1
1278 else
1279 L_tmpnam  = 20
1280 TMP_MAX   = 238328
1281 L_ctermid = 9
1282 L_cuserid = 9
1283 endif
1284 stdio_lim = $(common-objpfx)bits/stdio_lim.h
1285
1286 $(stdio_lim:lim.h=%.h) $(stdio_lim:lim.h=%.d): $(stdio_lim:lim.h=%.st); @:
1287 $(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \
1288                    $(common-objpfx)config.make
1289         $(make-target-directory)
1290         { echo '#include "$(..)posix/bits/posix1_lim.h"';               \
1291           echo '#define _LIBC 1';                                       \
1292           echo '#include "$(..)misc/sys/uio.h"'; } |                    \
1293         $(CC) -E -dM -MD -MP -MF $(@:st=dT) -MT '$(@:st=h) $(@:st=d)'   \
1294               $(+includes) -xc - -o $(@:st=hT)
1295         sed $(sed-remove-objpfx) $(sed-remove-dotdot)                   \
1296             $(@:st=dT) > $(@:st=dt)
1297         mv -f $(@:st=dt) $(@:st=d)
1298         fopen_max=`sed -n 's/^#define OPEN_MAX //1p' $(@:st=hT)`;       \
1299         filename_max=`sed -n 's/^#define PATH_MAX //1p' $(@:st=hT)`;    \
1300         iov_max=`sed -n 's/^#define UIO_MAXIOV //p' $(@:st=hT)`;        \
1301         fopen_max=$${fopen_max:-16};                                    \
1302         filename_max=$${filename_max:-1024};                            \
1303         if [ -z "$$iov_max" ]; then                                     \
1304           define_iov_max="# undef IOV_MAX";                             \
1305         else                                                            \
1306           define_iov_max="# define IOV_MAX $$iov_max";                  \
1307         fi;                                                             \
1308         sed -e "s/@FOPEN_MAX@/$$fopen_max/"                             \
1309             -e "s/@FILENAME_MAX@/$$filename_max/"                       \
1310             -e "s/@L_tmpnam@/$(L_tmpnam)/"                              \
1311             -e "s/@TMP_MAX@/$(TMP_MAX)/"                                \
1312             -e "s/@L_ctermid@/$(L_ctermid)/"                            \
1313             -e "s/@L_cuserid@/$(L_cuserid)/"                            \
1314             -e "s/@define_IOV_MAX@/$$define_iov_max/"                   \
1315             $< > $(@:st=h.new)
1316         $(move-if-change) $(@:st=h.new) $(@:st=h)
1317 # Remove these last so that they can be examined if something went wrong.
1318         rm -f $(@:st=hT) $(@:st=dT) $(@:st=dt)
1319         touch $@
1320 # Get dependencies.
1321 ifndef no_deps
1322 -include $(stdio_lim:h=d)
1323 endif
1324 common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st
1325 \f
1326 .PHONY: TAGS
1327 TAGS: $(objpfx)distinfo $(..)MakeTAGS
1328         $(MAKE) $(addprefix -f ,$^) $@
1329
1330 $(..)po/%.pot: $(objpfx)distinfo $(..)MakeTAGS FORCE
1331         $(MAKE) $(addprefix -f ,$(filter-out FORCE,$^)) $@
1332 FORCE:
1333
1334
1335 .PHONY: echo-headers
1336 echo-headers:
1337         @echo $(headers)
1338
1339 %.bz2: %; bzip2 -9vk $<
1340 %.gz: %; gzip -9vnc $< > $@.new && mv -f $@.new $@
1341 \f
1342 # Common cleaning targets.
1343
1344 .PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean
1345 clean: common-clean
1346 mostlyclean: common-mostlyclean
1347
1348 do-tests-clean:
1349         -rm -f $(addprefix $(objpfx),$(addsuffix .out,$(tests) $(xtests) \
1350                                                       $(test-srcs)) \
1351                                      $(addsuffix -bp.out,$(tests) $(xtests) \
1352                                                          $(test-srcs)))
1353
1354 # Remove the object files.
1355 common-mostlyclean:
1356         -rm -f $(addprefix $(objpfx),$(tests) $(xtests) $(test-srcs) \
1357                                      $(others) $(sysdep-others) stubs \
1358                                      $(addsuffix .o,$(tests) $(xtests) \
1359                                                     $(test-srcs) $(others) \
1360                                                     $(sysdep-others)) \
1361                                      $(addsuffix -bp,$(tests) $(xtests) \
1362                                                      $(test-srcs)) \
1363                                      $(addsuffix .out,$(tests) $(xtests) \
1364                                                       $(test-srcs)) \
1365                                      $(addsuffix -bp.out,$(tests) $(xtests) \
1366                                                          $(test-srcs)))
1367         -rm -f $(addprefix $(objpfx),$(extra-objs) $(install-lib) \
1368                                      $(install-lib.so) \
1369                                      $(install-lib.so:%.so=%_pic.a))
1370         -rm -f core
1371         -rm -f $(objpfx)rtld-*.os
1372         $(rmobjs)
1373 define rmobjs
1374 $(foreach o,$(object-suffixes-for-libc),
1375 -rm -f $(objpfx)stamp$o $(o-objects))
1376 endef
1377
1378 # Also remove the dependencies and generated source files.
1379 common-clean: common-mostlyclean
1380         -rm -f $(addprefix $(objpfx),$(generated))
1381         -rm -f $(objpfx)*.d $(objpfx)*.dt
1382         -rm -fr $(addprefix $(objpfx),$(generated-dirs))
1383         -rm -f $(addprefix $(common-objpfx),$(common-generated))
1384         -rm -f $(objpfx)distinfo
1385 \f
1386 # Produce a file `stubs' which contains `#define __stub_FUNCTION'
1387 # for each function which is a stub.  We grovel over all the .d files
1388 # looking for references to <stub-tag.h>.  Then we grovel over each
1389 # referenced source file to see what stub function it defines.
1390
1391 ifdef objpfx
1392 .PHONY: stubs # The parent Makefile calls this target.
1393 stubs: $(objpfx)stubs
1394 endif
1395 objs-for-stubs := $(foreach o,$(object-suffixes-for-libc),$(o-objects)) \
1396                   $(addprefix $(objpfx),$(extra-objs))
1397 $(objpfx)stubs: $(objs-for-stubs)
1398 ifneq (,$(strip $(objs-for-stubs)))
1399         (cd $(objpfx).; $(OBJDUMP) -h $(patsubst $(objpfx)%,%,$^)) | \
1400         $(AWK) '/\.gnu\.glibc-stub\./ { \
1401                   sub(/\.gnu\.glibc-stub\./, "", $$2); \
1402                   stubs[$$2] = 1; } \
1403                 END { for (s in stubs) print "#define __stub_" s }' > $@T
1404         mv -f $@T $@
1405 else
1406         > $@
1407 endif
1408 \f
1409 # This information is not used for making distributions any more.
1410 # But it's used by MakeTAGS for making TAGS files and the .pot files.
1411 $(objpfx)distinfo: Makefile $(..)Makerules \
1412                    $(wildcard $(foreach dir,$(sysdirs),$(dir)/Makefile))
1413         $(make-target-directory)
1414         $(distinfo-vars)
1415         mv -f $@.new $@
1416
1417 define distinfo-vars
1418 rm -f $@.new
1419 echo > $@.new 'subdir := $(subdir)'
1420 $(foreach var,subdir-dirs sources elided-routines sysdep_routines \
1421               headers sysdep_headers distribute dont_distribute generated \
1422               others tests xtests test-srcs extra-libs versioned \
1423               $(extra-libs:%=%-routines) \
1424               $(addprefix install-,lib lib.so data bin bin-script sbin others),
1425 echo >> $@.new '$(subdir)-$(var) := $($(var))'
1426 echo >> $@.new '$(var) = $$($(subdir)-$(var))')
1427 endef
1428 \f
1429 ifneq (,$(strip $(gpl2lgpl)))
1430 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
1431 # Snarf from the master source and frob the copying notice.
1432 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
1433         sed -f $^ > $@-tmp
1434 # So I don't edit them by mistake.
1435         chmod a-w $@-tmp
1436         mv -f $@-tmp $@
1437 ifeq ($(with-cvs),yes)
1438         test ! -d CVS || cvs $(CVSOPTS) commit -m'Updated from $^' $@
1439 endif
1440 endif
1441 endif
1442
1443 # Local Variables:
1444 # mode: makefile
1445 # End: