Makerules

   1 # Copyright (C) 1991-2014 Free Software Foundation, Inc.
   2 # This file is part of the GNU C Library.
   3
   4 # The GNU C Library is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU Lesser General Public
   6 # License as published by the Free Software Foundation; either
   7 # version 2.1 of the License, or (at your option) any later version.
   8
   9 # The GNU C Library is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # Lesser General Public License for more details.
  13
  14 # You should have received a copy of the GNU Lesser General Public
  15 # License along with the GNU C Library; if not, see
  16 # <http://www.gnu.org/licenses/>.
  17
  18 #
  19 #       Common rules for making the GNU C library.  This file is included
  20 #       by the top-level Makefile and by all subdirectory makefiles
  21 #       (through Rules).
  22 #
  23 ifneq (,)
  24 This makefile requires GNU Make.
  25 endif
  26
  27 REQUIRED_MAKE_VERSION = 3.74
  28 REAL_MAKE_VERSION = $(firstword $(MAKE_VERSION))
  29
  30 ifneq ($(REQUIRED_MAKE_VERSION), \
  31        $(firstword $(sort $(REAL_MAKE_VERSION) $(REQUIRED_MAKE_VERSION))))
  32 Wrong GNU Make version.  See above for the version needed.
  33 endif
  34
  35
  36 ifdef   subdir
  37 ..      := ../
  38 endif   # subdir
  39
  40 # If `sources' was defined by the parent makefile, undefine it so
  41 # we will later get it from wildcard search in this directory.
  42 ifneq   "$(findstring env,$(origin sources))" ""
  43 sources :=
  44 endif
  45
  46 oPATH := $(PATH)
  47 PATH := this definition should take precedence over $(oPATH)
  48 ifeq ($(PATH),$(oPATH))
  49 You must not use the -e flag when building the GNU C library.
  50 else
  51 PATH := $(oPATH)
  52 endif
  53 \f
  54 ifndef +included-Makeconfig
  55 include $(..)Makeconfig
  56 endif
  57
  58 # This variable is used in ``include $(o-iterator)'' after defining
  59 # $(o-iterator-doit) to produce some desired rule using $o for the object
  60 # suffix, and setting $(object-suffixes-left) to $(object-suffixes); a copy
  61 # is produced for each object suffix in use.
  62 o-iterator = $(patsubst %,$(..)o-iterator.mk,$(object-suffixes-left))
  63 \f
  64 # Include any system-specific makefiles.
  65
  66 # This is here so things in sysdep Makefiles can easily depend on foo.h as
  67 # appropriate and not worry about where foo.h comes from, which may be
  68 # system dependent and not known by that Makefile.
  69 vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
  70                                       $(+sysdep_dirs) $(..)))
  71
  72 # The same is true for RPC source files.
  73 vpath %.x $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
  74                                       $(+sysdep_dirs) $(..)))
  75
  76 # Some sysdep makefiles use this to distinguish being included here from
  77 # being included individually by a subdir makefile (hurd/Makefile needs this).
  78 in-Makerules := yes
  79
  80 sysdep-makefiles := $(wildcard $(sysdirs:=/Makefile))
  81 ifneq (,$(sysdep-makefiles))
  82 include $(sysdep-makefiles)
  83 endif
  84
  85
  86 # Reorder before-compile so that mach things come first, and hurd things
  87 # second, before all else.  The mach and hurd subdirectories have many
  88 # generated header files which the much of rest of the library depends on,
  89 # so it is best to build them first (and mach before hurd, at that).
  90 before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\
  91                            $(before-compile)) \
  92                   $(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
  93                                $(before-compile))
  94
  95 # Even before that, we need abi-versions.h which is generated right here.
  96 ifeq ($(build-shared),yes)
  97 ifndef avoid-generated
  98 before-compile := $(common-objpfx)abi-versions.h $(before-compile)
  99 $(common-objpfx)abi-versions.h: $(..)scripts/abi-versions.awk \
 100                                 $(common-objpfx)Versions.all
 101         LC_ALL=C $(AWK) -v oldest_abi=$(oldest-abi) -f $^ > $@T
 102         mv -f $@T $@
 103
 104 $(common-objpfx)%.latest: $(common-objpfx)abi-versions.h
 105         sed -n '/ VERSION_$*_/{s/^.*_\([A-Z0-9_]*\).*$$/\1/;h;};$${g;p;}' \
 106             $(common-objpfx)abi-versions.h > $@T
 107         mv -f $@T $@
 108 endif # avoid-generated
 109 endif # $(build-shared) = yes
 110
 111 ifndef avoid-generated
 112 before-compile := $(common-objpfx)libc-abis.h $(before-compile)
 113 $(common-objpfx)libc-abis.h: $(common-objpfx)libc-abis.stamp; @:
 114 $(common-objpfx)libc-abis.stamp: $(..)scripts/gen-libc-abis \
 115                              $(firstword $(wildcard $(sysdirs:=/libc-abis)) \
 116                                          $(..)libc-abis) \
 117                              $(..)Makerules
 118         $(SHELL) $< \
 119                  $(base-machine)-$(config-vendor)-$(config-os) \
 120                  < $(word 2,$^) > $(@:.stamp=.h)T
 121         $(move-if-change) $(@:.stamp=.h)T $(@:.stamp=.h)
 122         touch $@
 123 common-generated += $(common-objpfx)libc-abis.h
 124 endif # avoid-generated
 125
 126 # Make sure the subdirectory for object files gets created.
 127 ifdef objpfx
 128 ifeq (,$(wildcard $(objpfx).))
 129 before-compile += $(objpfx).
 130 $(objpfx).:
 131         $(make-target-directory)
 132 endif
 133 endif
 134
 135 # Remove existing files from `before-compile'.  Things are added there when
 136 # they must exist for dependency generation to work right, but once they
 137 # exist there is no further need for every single file to depend on them,
 138 # and those gratuitous dependencies result in many gratuitous
 139 # recompilations.
 140 before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
 141
 142 # Don't let any before-compile file be an intermediate and get removed.
 143 ifdef before-compile
 144 $(before-compile):
 145 endif
 146
 147 # We don't want $(common-objpfx) files to depend on miscellaneous stuff
 148 # in subdirs.
 149 ifdef subdir
 150 common-before-compile := $(filter-out $(objpfx)%,$(before-compile))
 151 else
 152 common-before-compile = $(before-compile)
 153 endif
 154
 155 ifndef subdir
 156 # If a makefile needs to do something conditional on something that
 157 # can only be figured out from headers, write a FOO.make.c input
 158 # file that uses cpp contructs and contains @@@ LINE @@@ for each LINE
 159 # to emit in the generated makefile, and use -include $(common-objpfx)FOO.make.
 160 #
 161 # We only generate these in the top-level makefile, to avoid any weirdness
 162 # from subdir-specific makefile tweaks creeping in on an update.
 163 $(common-objpfx)%.make: $(..)%.make.c $(..)Makerules $(common-before-compile)
 164         rm -f $@T $@.dT
 165         (echo '# Generated from $*.make.c by Makerules.'; \
 166          $(CC) $(CFLAGS) $(CPPFLAGS) -E -DASSEMBLER $< \
 167                -MD -MP -MT '$$(common-objpfx)$*.make' -MF $@.dT \
 168          | sed -n '/@@@/{s/@@@[  ]*\(.*\)@@@/\1/;s/[     ]*$$//p;}'; \
 169          echo 'common-generated += $(@F)'; \
 170          sed $(sed-remove-objpfx) $(sed-remove-dotdot) $@.dT; \
 171          rm -f $@.dT) > $@T
 172         mv -f $@T $@
 173 endif
 174
 175 ifdef subdir
 176 sed-remove-dotdot := -e 's@  *\.\.\/\([^        \]*\)@ $$(..)\1@g' \
 177                      -e 's@^\.\.\/\([^  \]*\)@$$(..)\1@g'
 178 else
 179 sed-remove-dotdot := -e 's@  *\([^      \/$$][^         \]*\)@ $$(..)\1@g' \
 180                      -e 's@^\([^        \/$$][^         \]*\)@$$(..)\1@g'
 181 endif
 182
 183
 184 ifdef gen-as-const-headers
 185 # Generating headers for assembly constants.
 186 # We need this defined early to get into before-compile before
 187 # it's used in sysd-rules, below.
 188 $(common-objpfx)%.h $(common-objpfx)%.h.d: $(..)scripts/gen-as-const.awk \
 189                                            %.sym $(common-before-compile)
 190         $(AWK) -f $< $(filter %.sym,$^) \
 191         | $(CC) -S -o $(@:.h.d=.h)T3 $(CFLAGS) $(CPPFLAGS) -x c - \
 192                 -MD -MP -MF $(@:.h=.h.d)T -MT '$(@:.h=.h.d) $(@:.h.d=.h)'
 193         sed -n 's/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*$$/#define \1 \2/p' \
 194                 $(@:.h.d=.h)T3 > $(@:.h.d=.h)T
 195         rm -f $(@:.h.d=.h)T3
 196         sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
 197             $(@:.h=.h.d)T > $(@:.h=.h.d)T2
 198         rm -f $(@:.h=.h.d)T
 199         mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d)
 200         mv -f $(@:.h.d=.h)T $(@:.h.d=.h)
 201 vpath %.sym $(sysdirs)
 202 before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 203
 204 tests += $(gen-as-const-headers:%.sym=test-as-const-%)
 205 generated += $(gen-as-const-headers:%.sym=test-as-const-%.c)
 206 $(objpfx)test-as-const-%.c: $(..)scripts/gen-as-const.awk $(..)Makerules \
 207                             %.sym $(common-objpfx)%.h
 208         ($(AWK) '{ sub(/^/, "asconst_", $$2); print; }' $(filter %.h,$^); \
 209          $(AWK) -v test=1 -f $< $(filter %.sym,$^); \
 210          echo '#include "$(..)test-skeleton.c"') > $@T
 211         mv -f $@T $@
 212 endif
 213 \f
 214 # Generate an ordered list of implicit rules which find the source files in
 215 # each sysdep directory.  The old method was to use vpath to search all the
 216 # sysdep directories.  However, that had the problem that a .S file in a
 217 # later directory would be chosen over a .c file in an earlier directory,
 218 # which does not preserve the desired sysdeps ordering behavior.
 219
 220 # System-dependent makefiles can put in `inhibit-sysdep-asm' regexps
 221 # matching sysdep directories whose assembly source files should be
 222 # suppressed.
 223
 224 -include $(common-objpfx)sysd-rules
 225 ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
 226 # The value of $(+sysdep_dirs) the sysd-rules was computed for
 227 # differs from the one we are using now.  So force a rebuild of sysd-rules.
 228 sysd-rules-force = FORCE
 229 FORCE:
 230 endif
 231 $(common-objpfx)sysd-rules: $(..)scripts/sysd-rules.awk \
 232                             $(common-objpfx)config.make $(..)Makerules \
 233                             $(sysdep-makefiles) $(sysdep-makeconfigs) \
 234                             $(sysd-rules-force)
 235         -@rm -f $@T
 236         LC_ALL=C $(AWK) -f $< > $@T \
 237                         -v all_object_suffixes='$(all-object-suffixes)' \
 238                         -v inhibit_sysdep_asm='$(inhibit-sysdep-asm)' \
 239                         -v sysd_rules_patterns='$(sysd-rules-patterns)' \
 240                         -v config_sysdirs='$(config-sysdirs)'
 241         mv -f $@T $@
 242
 243 ifndef sysd-rules-done
 244 # Don't do deps until this exists, because it provides rules to make the deps.
 245 no_deps=t
 246 endif
 247
 248 define o-iterator-doit
 249 $(objpfx)%$o: %.S $(before-compile); $$(compile-command.S)
 250 endef
 251 object-suffixes-left := $(all-object-suffixes)
 252 include $(o-iterator)
 253
 254 define o-iterator-doit
 255 $(objpfx)%$o: %.c $(before-compile); $$(compile-command.c)
 256 endef
 257 object-suffixes-left := $(all-object-suffixes)
 258 include $(o-iterator)
 259
 260 define o-iterator-doit
 261 $(objpfx)%$o: %.cc $(before-compile); $$(compile-command.cc)
 262 endef
 263 object-suffixes-left := $(all-object-suffixes)
 264 include $(o-iterator)
 265
 266 # Omit the objpfx rules when building in the source tree, because
 267 # objpfx is empty and so these rules just override the ones above.
 268 ifdef objpfx
 269 # Define first rules to find the source files in $(objpfx).
 270 # Generated source files will end up there.
 271 define o-iterator-doit
 272 $(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S)
 273 endef
 274 object-suffixes-left := $(all-object-suffixes)
 275 include $(o-iterator)
 276
 277 define o-iterator-doit
 278 $(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
 279 endef
 280 object-suffixes-left := $(all-object-suffixes)
 281 include $(o-iterator)
 282 endif
 283
 284 # Generate version maps, but wait until sysdep-subdirs is known
 285 ifeq ($(sysd-sorted-done),t)
 286 ifeq ($(build-shared),yes)
 287 -include $(common-objpfx)sysd-versions
 288 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
 289 common-generated += $(version-maps)
 290 postclean-generated += sysd-versions Versions.all abi-versions.h \
 291                        Versions.def Versions.v.i Versions.v
 292
 293 ifndef avoid-generated
 294 ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
 295 sysd-versions-force = FORCE
 296 FORCE:
 297 endif
 298
 299 $(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
 300                               $(common-objpfx)Versions.v
 301         LC_ALL=C $(AWK) -f $^ > $@T
 302         mv -f $@T $@
 303
 304 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
 305                               $(common-objpfx)soversions.i \
 306                               $(common-objpfx)Versions.def
 307         { while read which lib version setname; do \
 308             test x"$$which" = xDEFAULT || continue; \
 309             test -z "$$setname" || echo "$$lib : $$setname"; \
 310           done < $(word 2,$^); \
 311           cat $(word 3,$^); \
 312         } | LC_ALL=C $(AWK) -f $< > $@T
 313         mv -f $@T $@
 314 # See %.v/%.v.i implicit rules in Makeconfig.
 315 $(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
 316                               $(wildcard $(sysdirs:%=%/Versions)) \
 317                               $(sysd-versions-force)
 318 $(common-objpfx)sysd-versions: $(common-objpfx)Versions.all \
 319                                $(common-objpfx)Versions.v \
 320                                $(..)scripts/versions.awk
 321         ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
 322           cat $(word 2,$^) \
 323           | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
 324                             -v move_if_change='$(move-if-change)' \
 325                             -f $(word 3,$^); \
 326         ) > $@T
 327         mv -f $@T $@
 328 endif # avoid-generated
 329 endif # $(build-shared) = yes
 330 endif # sysd-sorted-done
 331
 332 # Generate .dT files as we compile.
 333 compile-mkdep-flags = -MD -MP -MF $@.dt -MT $@
 334 compile-command.S = $(compile.S) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 335 compile-command.c = $(compile.c) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 336 compile-command.cc = $(compile.cc) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 337
 338 # Like compile-mkdep-flags, but for use with $(BUILD_CC).  We don't want to
 339 # track system includes here, they may spuriously trigger an install rule,
 340 # and would cause the check-local-headers test to fail.
 341 native-compile-mkdep-flags = -MMD -MP -MF $@.dt -MT $@
 342
 343 # GCC can grok options after the file name, and it looks nicer that way.
 344 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
 345 compile.cc = $(CXX) $< -c $(CXXFLAGS) $(CPPFLAGS)
 346 compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \
 347                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 348 COMPILE.c = $(CC) -c $(CFLAGS) $(CPPFLAGS)
 349 COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \
 350                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 351
 352 # We need this for the output to go in the right place.  It will default to
 353 # empty if make was configured to work with a cc that can't grok -c and -o
 354 # together.  You can't compile the C library with such a compiler.
 355 OUTPUT_OPTION = -o $@
 356
 357 # This is the end of the pipeline for compiling generated C code.
 358 compile-stdin.c = $(COMPILE.c) -o $@ -x c - $(compile-mkdep-flags)
 359
 360 # We need the $(CFLAGS) to be in there to have the right predefines during
 361 # the dependency run for C sources.  But having it for assembly sources can
 362 # get the wrong predefines.
 363 S-CPPFLAGS = -DASSEMBLER $(asm-CPPFLAGS)
 364
 365 define +make-deps
 366 $(make-target-directory)
 367 $(+mkdep) $< $(if $(filter %.c,$<),$(CFLAGS)) \
 368              $(CPPFLAGS) $($(patsubst .%,%,$(suffix $(<F)))-CPPFLAGS) | sed -e\
 369 's,$(subst .,\.,$(@F:.d=.o)),$(foreach o,$(all-object-suffixes),$(@:.d=$o)) $@,' \
 370 $(sed-remove-objpfx) $(sed-remove-dotdot) > $(@:.d=.T)
 371 mv -f $(@:.d=.T) $@ $(generate-md5)
 372 endef
 373
 374 ifneq (,$(objpfx))
 375 # Continuation lines here are dangerous because they introduce spaces!
 376 define sed-remove-objpfx
 377 -e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
 378 -e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g'
 379 endef
 380 endif
 381 \f
 382 # Modify the list of routines we build for different targets
 383
 384 ifeq (yes,$(build-shared))
 385 ifndef libc.so-version
 386 # Undefine this because it can't work when we libc.so is unversioned.
 387 static-only-routines =
 388 endif
 389 endif
 390
 391 elide-routines.oS += $(filter-out $(static-only-routines),\
 392                                   $(routines) $(aux) $(sysdep_routines))
 393 elide-routines.os += $(static-only-routines)
 394
 395 # If we have versioned code we don't need the old versions in any of the
 396 # static libraries.
 397 elide-routines.o  += $(shared-only-routines)
 398 elide-routines.op += $(shared-only-routines)
 399 elide-routines.og += $(shared-only-routines)
 400 \f
 401 # Shared library building.
 402
 403 ifeq (yes,$(build-shared))
 404
 405 # Reference map file only when shared libraries are built and a map file name
 406 # is given.
 407 ifeq ($(build-shared),yes)
 408 map-file = $(firstword $($(@F:.so=-map)) \
 409                        $(addprefix $(common-objpfx), \
 410                                    $(filter $(@F:.so=.map),$(version-maps))))
 411 load-map-file = $(map-file:%=-Wl,--version-script=%)
 412 endif
 413
 414 # Compiler arguments to use to link a shared object with libc and
 415 # ld.so.  This is intended to be as similar as possible to a default
 416 # link with an installed libc.
 417 link-libc-args = -Wl,--start-group \
 418                  $(libc-for-link) \
 419                  $(common-objpfx)libc_nonshared.a \
 420                  $(as-needed) $(elfobjdir)/ld.so $(no-as-needed) \
 421                  -Wl,--end-group
 422
 423 # The corresponding shared libc to use.  This may be modified for a
 424 # particular target.
 425 libc-for-link = $(common-objpfx)libc.so
 426
 427 # The corresponding dependencies.  As these are used in dependencies,
 428 # not just commands, they cannot use target-specific variables so need
 429 # to name both possible libc.so objects.
 430 link-libc-deps = $(common-objpfx)libc.so $(common-objpfx)linkobj/libc.so \
 431                  $(common-objpfx)libc_nonshared.a $(elfobjdir)/ld.so
 432
 433 # Pattern rule to build a shared object from an archive of PIC objects.
 434 # This must come after the installation rules so Make doesn't try to
 435 # build shared libraries in place from the installed *_pic.a files.
 436 # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
 437 # on other shared objects.  The linking with libc and ld.so is intended
 438 # to be as similar as possible to a default link with an installed libc.
 439 lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(+interp) $(link-libc-deps)
 440         $(build-shlib) $(link-libc-args)
 441
 442 define build-shlib-helper
 443 $(LINK.o) -shared $(static-libgcc) -Wl,-O1 $(sysdep-LDFLAGS) \
 444           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) $(rtld-LDFLAGS) \
 445           $(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \
 446           $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
 447           -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
 448           $(LDFLAGS.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
 449           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 450 endef
 451
 452 ifeq (yes,$(use-default-link))
 453 # If the linker is good enough, we can let it use its default linker script.
 454 shlib-lds =
 455 shlib-lds-flags =
 456 else
 457 # binutils only position loadable notes into the first page for binaries,
 458 # not for shared objects
 459 $(common-objpfx)shlib.lds: $(common-objpfx)config.make $(..)Makerules
 460         $(LINK.o) -shared -Wl,-O1 \
 461                   -nostdlib -nostartfiles \
 462                   $(sysdep-LDFLAGS) $(rtld-LDFLAGS) $(LDFLAGS.so) \
 463                   -Wl,--verbose 2>&1 | \
 464           sed > $@T \
 465               -e '/^=========/,/^=========/!d;/^=========/d' \
 466               $(if $(filter yes,$(have-hash-style)), \
 467                    -e 's/^.*\.gnu\.hash[        ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 468                    -e '/^[      ]*\.hash[       ]*:.*$$/{h;d;}' \
 469                    -e '/DATA_SEGMENT_ALIGN/{H;g}' \
 470                 , \
 471                    -e 's/^.*\.hash[     ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 472                ) \
 473               -e 's/^.*\*(\.dynbss).*$$/& \
 474                  PROVIDE(__start___libc_freeres_ptrs = .); \
 475                  *(__libc_freeres_ptrs) \
 476                  PROVIDE(__stop___libc_freeres_ptrs = .);/'\
 477               -e 's@^.*\*(\.jcr).*$$@& \
 478                  PROVIDE(__start___libc_subfreeres = .);\
 479                  __libc_subfreeres : { *(__libc_subfreeres) }\
 480                  PROVIDE(__stop___libc_subfreeres = .);\
 481                  PROVIDE(__start___libc_atexit = .);\
 482                  __libc_atexit : { *(__libc_atexit) }\
 483                  PROVIDE(__stop___libc_atexit = .);\
 484                  PROVIDE(__start___libc_thread_subfreeres = .);\
 485                  __libc_thread_subfreeres : { *(__libc_thread_subfreeres) }\
 486                  PROVIDE(__stop___libc_thread_subfreeres = .);\
 487                  /DISCARD/ : { *(.gnu.glibc-stub.*) }@'
 488         test -s $@T
 489         mv -f $@T $@
 490 common-generated += shlib.lds
 491
 492 shlib-lds = $(common-objpfx)shlib.lds
 493 shlib-lds-flags = -T $(shlib-lds)
 494 endif
 495
 496 define build-shlib
 497 $(build-shlib-helper) -o $@ $(shlib-lds-flags) \
 498           $(csu-objpfx)abi-note.o $(build-shlib-objlist)
 499 endef
 500
 501 define build-module-helper
 502 $(LINK.o) -shared $(static-libgcc) $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
 503           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
 504           -B$(csu-objpfx) $(load-map-file) \
 505           $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
 506           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 507 endef
 508
 509 # This macro is similar to build-shlib but it does not define a soname
 510 # and it does not depend on the destination name to start with `lib'.
 511 # binutils only position loadable notes into the first page for binaries,
 512 # not for shared objects
 513 define build-module
 514 $(build-module-helper) -o $@ $(shlib-lds-flags) \
 515           $(csu-objpfx)abi-note.o $(build-module-objlist) $(link-libc-args)
 516 endef
 517 define build-module-asneeded
 518 $(build-module-helper) -o $@ $(shlib-lds-flags) \
 519           $(csu-objpfx)abi-note.o \
 520           -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed \
 521           $(link-libc-args)
 522 endef
 523
 524 build-module-helper-objlist = \
 525         $(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\
 526                    $(filter-out %.lds $(map-file) $(+preinit) $(+postinit) \
 527                                 $(link-libc-deps),$^))
 528
 529 build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so)
 530 build-shlib-objlist = $(build-module-helper-objlist) \
 531                       $(LDLIBS-$(@F:lib%.so=%).so)
 532
 533 # Don't try to use -lc when making libc.so itself.
 534 # Also omits crti.o and crtn.o, which we do not want
 535 # since we define our own `.init' section specially.
 536 LDFLAGS-c.so = -nostdlib -nostartfiles
 537 # But we still want to link libc.so against $(libc.so-gnulib).
 538 LDLIBS-c.so += $(libc.so-gnulib)
 539 # Give libc.so an entry point and make it directly runnable itself.
 540 LDFLAGS-c.so += -e __libc_main
 541 # If lazy relocation is disabled add the -z now flag.
 542 ifeq ($(bind-now),yes)
 543 LDFLAGS-c.so += -Wl,-z,now
 544 endif
 545 # Pre-link the objects of libc_pic.a so that we can locally resolve
 546 # COMMON symbols before we link against ld.so.  This is because ld.so
 547 # contains some of libc_pic.a already, which will prevent the COMMONs
 548 # from being allocated in libc.so, which introduces evil dependencies
 549 # between libc.so and ld.so, which can make it impossible to upgrade.
 550 $(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
 551         $(LINK.o) -nostdlib -nostartfiles -r -o $@ \
 552         $(LDFLAGS-c_pic.os) -Wl,-d $(whole-archive) $^ -o $@
 553
 554 ifeq (,$(strip $(shlib-lds-flags)))
 555 # Generate a list of -R options to excise .gnu.glibc-stub.* sections.
 556 $(common-objpfx)libc_pic.opts: $(common-objpfx)libc_pic.os
 557         $(OBJDUMP) -h $< | \
 558         $(AWK) '$$2 ~ /\.gnu\.glibc-stub\./ { print "-R", $$2 }' \
 559                 > $@T
 560         mv -f $@T $@
 561 # Apply those -R options.
 562 $(common-objpfx)libc_pic.os.clean: $(common-objpfx)libc_pic.opts \
 563                                    $(common-objpfx)libc_pic.os
 564         $(OBJCOPY) @$^ $@
 565 generated += libc_pic.opts libc_pic.os.clean
 566
 567 libc_pic_clean := .clean
 568 endif
 569
 570 # Build a possibly-modified version of libc_pic.a for use in building
 571 # linkobj/libc.so.
 572 ifeq (,$(filter sunrpc,$(subdirs)))
 573 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a
 574         $(make-target-directory)
 575         ln -f $< $@
 576 else
 577 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a \
 578                                     $(common-objpfx)sunrpc/librpc_compat_pic.a
 579         $(make-target-directory)
 580         (cd $(common-objpfx)linkobj; \
 581          $(AR) x ../libc_pic.a; \
 582          rm $$($(AR) t ../sunrpc/librpc_compat_pic.a | sed 's/^compat-//'); \
 583          $(AR) x ../sunrpc/librpc_compat_pic.a; \
 584          $(AR) cr libc_pic.a *.os; \
 585          rm *.os)
 586 endif # $(subdirs) contains sunrpc
 587
 588 # Clear link-libc-deps for the libc.so libraries so build-shlibs does not
 589 # filter ld.so out of the list of linked objects.
 590 $(common-objpfx)libc.so: link-libc-deps = # empty
 591 $(common-objpfx)linkobj/libc.so: link-libc-deps = # empty
 592
 593 # Use our own special initializer and finalizer files for the libc.so
 594 # libraries.
 595 $(common-objpfx)libc.so: $(elfobjdir)/soinit.os \
 596                          $(common-objpfx)libc_pic.os$(libc_pic_clean) \
 597                          $(elfobjdir)/sofini.os \
 598                          $(elfobjdir)/interp.os \
 599                          $(elfobjdir)/ld.so \
 600                          $(shlib-lds)
 601         $(build-shlib)
 602
 603 $(common-objpfx)linkobj/libc.so: $(elfobjdir)/soinit.os \
 604                          $(common-objpfx)linkobj/libc_pic.a \
 605                          $(elfobjdir)/sofini.os \
 606                          $(elfobjdir)/interp.os \
 607                          $(elfobjdir)/ld.so \
 608                          $(shlib-lds)
 609         $(build-shlib)
 610
 611 ifeq ($(build-shared),yes)
 612 $(common-objpfx)libc.so: $(common-objpfx)libc.map
 613 endif
 614 common-generated += libc.so libc_pic.os
 615 ifdef libc.so-version
 616 $(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
 617         $(make-link)
 618 common-generated += libc.so$(libc.so-version)
 619 endif
 620 endif
 621 \f
 622 # Figure out the source filenames in this directory.
 623
 624 override sources := $(addsuffix .c,\
 625                         $(filter-out $(elided-routines),\
 626                             $(routines) $(aux) \
 627                             $(sysdep_routines)))
 628 sysdep_routines := $(sysdep_routines)
 629
 630 headers := $(headers) $(sysdep_headers)
 631
 632 # This is the list of all object files, gotten by
 633 # replacing every ".c" in `sources' with a ".o".
 634 override objects := $(addprefix $(objpfx),$(sources:.c=.o))
 635
 636
 637 # The makefile may define $(extra-libs) with `libfoo libbar'
 638 # to build libfoo.a et al from the modules listed in $(libfoo-routines).
 639 ifdef extra-libs
 640 # extra-lib.mk is included once for each extra lib to define rules
 641 # to build it, and to add its objects to the various variables.
 642 # During its evaluation, $(lib) is set to the name of the library.
 643 extra-libs-left := $(extra-libs)
 644 include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
 645 endif
 646
 647
 648 # The makefile may define $(modules-names) to build additional modules.
 649 # These are built with $(build-module), except any in $(modules-names-nobuild).
 650 ifdef modules-names
 651 # extra-lib.mk is included once for each extra lib to define rules
 652 # to build it, and to add its objects to the various variables.
 653 # During its evaluation, $(lib) is set to the name of the library.
 654 extra-modules-left := $(modules-names)
 655 include $(patsubst %,$(..)extra-modules.mk,$(modules-names))
 656
 657 extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names))
 658 $(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \
 659                 $(objpfx)%.os $(shlib-lds) $(link-libs-deps)
 660         $(build-module)
 661 endif
 662 \f
 663 +depfiles := $(sources:.c=.d) \
 664              $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \
 665              $(patsubst %.oS,%.d,$(filter %.oS,$(extra-objs))) \
 666              $(patsubst %.o,%.d,$(filter %.o,$(extra-test-objs:.os=.o))) \
 667              $(addsuffix .d,$(tests) $(xtests) $(test-srcs))
 668 ifeq ($(build-programs),yes)
 669 +depfiles += $(addsuffix .d,$(others) $(sysdep-others))
 670 endif
 671 +depfiles := $(addprefix $(objpfx),\
 672                          $(filter-out $(addsuffix .d,$(omit-deps)),\
 673                                       $(+depfiles)))
 674 all-dt-files := $(foreach o,$(object-suffixes-for-libc),$(+depfiles:.d=$o.dt))
 675 +depfiles := $(patsubst %.dt,%.d,$(wildcard $(all-dt-files))) \
 676              $(wildcard $(all-dt-files:.dt=.d))
 677
 678 # This is a funny rule in that it removes its input file.
 679 %.d: %.dt
 680         @sed $(sed-remove-objpfx) $< > $(@:.d=.T) && \
 681          mv -f $(@:.d=.T) $@ && \
 682          rm -f $<
 683
 684 # Avoid the .h.d files for any .sym files whose .h files don't exist yet.
 685 # They will be generated when they're needed, and trying too early won't work.
 686 +gen-as-const := $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 687 +depfiles += $(addsuffix .d,$(filter $(wildcard $(+gen-as-const)),\
 688                                                 $(+gen-as-const)))
 689
 690 ifdef +depfiles
 691 ifneq ($(no_deps),t)
 692 -include $(+depfiles)
 693 endif
 694 endif
 695 \f\f
 696 # Maximize efficiency by minimizing the number of rules.
 697 .SUFFIXES:      # Clear the suffix list.  We don't use suffix rules.
 698 # Don't define any builtin rules.
 699 MAKEFLAGS := $(MAKEFLAGS)r
 700
 701 # Generic rule for making directories.
 702 %/:
 703 # mkdir isn't smart enough to strip a trailing /.
 704 # We always require a mkdir which supports the -p option to avoid error
 705 # messages in case of races.
 706         mkdir -p $(@:%/=%)
 707 \f
 708 # Make sure that object files are not removed
 709 # when they are intermediates between sources and library members.
 710 .PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes))
 711
 712 # Make sure that the parent library archive is never removed.
 713 .PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 714 \f
 715 # Use the verbose option of ar and tar when not running silently.
 716 ifeq    "$(findstring s,$(MAKEFLAGS))" ""       # if not -s
 717 verbose := v
 718 else                                            # -s
 719 verbose :=
 720 endif                                           # not -s
 721
 722 ARFLAGS := r$(verbose)
 723 CREATE_ARFLAGS := cru$(verbose)
 724 \f
 725 # This makes all the object files in the parent library archive.
 726
 727 .PHONY: lib lib-noranlib
 728 lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 729 lib-noranlib: libobjs
 730
 731 # For object-suffix $o, the list of objects with that suffix.
 732 # Makefiles can define `elide-routines.so = foo' to leave foo.so out.
 733 o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
 734                                                        $(elide-routines$o)),\
 735                                             $(objects))) \
 736             $(addprefix $(objpfx),$(o-objects$o))
 737
 738 others: $(addprefix $(objpfx),$(install-lib))
 739
 740 ifndef objects
 741
 742 # Create the stamp$o files to keep the parent makefile happy.
 743 subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 744 $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o):
 745         $(make-target-directory)
 746         rm -f $@; > $@
 747 else
 748
 749 # Define explicit rules to update each $(objpfx)stamp.SUFFIX
 750 # timestamp file; these rules (one explicit rule is generated for each
 751 # object suffix) write a list of objects to update in the stamp file.
 752 # The parent will then actually add them all to the archive in the
 753 # archive rule, below.
 754 define o-iterator-doit
 755 $(objpfx)stamp$o: $(o-objects); $$(do-stamp)
 756 endef
 757 define do-stamp
 758 $(make-target-directory)
 759 echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T
 760 mv -f $@T $@
 761 endef
 762 object-suffixes-left := $(object-suffixes-for-libc)
 763 include $(o-iterator)
 764
 765 endif
 766
 767 # Now define explicit rules to build the library archives; these depend
 768 # on the stamp files built above.
 769 define o-iterator-doit
 770 $(common-objpfx)$(patsubst %,$(libtype$o),c): \
 771                 $(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib)
 772 endef
 773 define do-makelib
 774 cd $(common-objdir) && \
 775 $(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)`
 776 endef
 777 subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%)
 778 subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
 779 ifndef subdir
 780 $(subdirs-stamps): subdir_lib;
 781 endif
 782 object-suffixes-left = $(object-suffixes-for-libc)
 783 include $(o-iterator)
 784
 785
 786 # This makes all the object files.
 787 .PHONY: objects objs libobjs extra-objs
 788 objects objs: libobjs extra-objs
 789 libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 790 extra-objs: $(addprefix $(objpfx),$(extra-objs))
 791
 792 # Canned sequence for building an extra library archive.
 793 define build-extra-lib
 794 $(patsubst %/,cd % &&,$(objpfx)) \
 795 $(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \
 796       $(patsubst $(objpfx)%,%,$^)
 797 endef
 798 \f
 799 # Installation.
 800
 801 .PHONY: force-install
 802 force-install:
 803
 804 # $(install-lib) are installed from the object directory into $(libdir);
 805 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
 806 # unless they also appear in $(non-lib.a).  $(install-data) are installed as
 807 # they are into $(datadir).  $(headers) are installed as they are in
 808 # $(includedir).  $(install-bin), $(install-bin-script) and $(install-sbin)
 809 # are installed from the object directory into $(bindir), $(bindir) and
 810 # $(sbindir), respectively.  $(install-others) and $(install-others-programs)
 811 # are absolute path names of files to install; rules to install them are
 812 # defined elsewhere.
 813
 814 # The simple library name to install libc.a under.
 815 # This could be defined by a sysdep Makefile.
 816 ifndef libc-name
 817 libc-name := c
 818 endif
 819
 820 define do-install
 821 $(make-target-directory)
 822 $(INSTALL_DATA) $< $@
 823 endef
 824
 825 # Make the target directory if it doesn't exist, using the `mkinstalldirs'
 826 # script that does `mkdir -p' even if `mkdir' doesn't support that flag.
 827 define make-target-directory
 828 $(addprefix $(..)./scripts/mkinstalldirs ,\
 829             $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
 830 endef
 831
 832 # Any directory (parent or subdir) should install libc.a; this way
 833 # "make install" in a subdir is guaranteed to install everything it changes.
 834 installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
 835                              $(inst_libdir)/$(patsubst %,$(libtype$o),\
 836                                                      $(libprefix)$(libc-name)))
 837 install: $(installed-libcs)
 838 $(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
 839         $(make-target-directory)
 840         $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
 841
 842 define do-install-program
 843 $(make-target-directory)
 844 $(INSTALL_PROGRAM) $< $@.new
 845 mv -f $@.new $@
 846 endef
 847
 848 define do-install-script
 849 $(make-target-directory)
 850 $(INSTALL_SCRIPT) $< $@.new
 851 mv -f $@.new $@
 852 endef
 853
 854 install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
 855 install-lib := $(filter-out %.so %_pic.a,$(install-lib))
 856
 857 ifeq (yes,$(build-shared))
 858 # Find which .so's have versions.
 859 versioned := $(strip $(foreach so,$(install-lib.so),\
 860                                $(patsubst %,$(so),$($(so)-version))))
 861
 862 install-lib.so-versioned := $(filter $(versioned), $(install-lib.so))
 863 install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so))
 864
 865 # For versioned libraries, we install three files:
 866 #       $(inst_libdir)/libfoo.so        -- for linking, symlink or ld script
 867 #       $(inst_slibdir)/libfoo.so.NN    -- for loading by SONAME, symlink
 868 #       $(inst_slibdir)/libfoo-X.Y.Z.so -- the real shared object file
 869 lib-version := $(firstword $($(subdir)-version) $(version))
 870 install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \
 871                       $(foreach L,$(install-lib.so-versioned),\
 872                                 $(inst_libdir)/$L \
 873                                 $(inst_slibdir)/$(L:.so=)-$(lib-version).so \
 874                                 $(inst_slibdir)/$L$($L-version))
 875
 876 # Install all the unversioned shared libraries.
 877 $(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \
 878     $(objpfx)%.so $(+force)
 879         $(do-install-program)
 880
 881 ifneq ($(findstring -s,$(LN_S)),)
 882 define make-link
 883 rm -f $@.new
 884 $(SHELL) $(..)scripts/rellns-sh $< $@.new
 885 mv -f $@.new $@
 886 endef
 887 else
 888 # If we have no symbolic links don't bother with rellns-sh.
 889 define make-link
 890 rm -f $@.new
 891 $(LN_S) $< $@.new
 892 mv -f $@.new $@
 893 endef
 894 endif
 895
 896 ifeq (yes,$(build-shared))
 897 ifeq (no,$(cross-compiling))
 898 symbolic-link-prog := $(common-objpfx)elf/sln
 899 symbolic-link-list := $(common-objpfx)elf/symlink.list
 900 define make-shlib-link
 901 echo `$(..)scripts/rellns-sh -p $< $@` $@ >> $(symbolic-link-list)
 902 endef
 903 else # cross-compiling
 904 # We need a definition that can be used by elf/Makefile's install rules.
 905 symbolic-link-prog = $(LN_S)
 906 endif
 907 endif
 908 ifndef make-shlib-link
 909 define make-shlib-link
 910 rm -f $@
 911 $(LN_S) `$(..)scripts/rellns-sh -p $< $@` $@
 912 endef
 913 endif
 914
 915 ifdef libc.so-version
 916 # For a library specified to be version N, install three files:
 917 # libc.so       ->      libc.so.N       (e.g. libc.so.6)
 918 # libc.so.6     ->      libc-VERSION.so (e.g. libc-1.10.so)
 919
 920 $(inst_slibdir)/libc.so$(libc.so-version): $(inst_slibdir)/libc-$(version).so \
 921                                            $(+force)
 922         $(make-shlib-link)
 923 $(inst_slibdir)/libc-$(version).so: $(common-objpfx)libc.so $(+force)
 924         $(do-install-program)
 925 install: $(inst_slibdir)/libc.so$(libc.so-version)
 926
 927 # This fragment of linker script gives the OUTPUT_FORMAT statement
 928 # for the configuration we are building.  We put this statement into
 929 # the linker scripts we install for -lc et al so that they will not be
 930 # used by a link for a different format on a multi-architecture system.
 931 $(common-objpfx)format.lds: $(..)scripts/output-format.sed \
 932                             $(common-objpfx)config.make \
 933                             $(common-objpfx)config.h $(..)Makerules
 934 ifneq (unknown,$(output-format))
 935         echo > $@.new 'OUTPUT_FORMAT($(output-format))'
 936 else
 937         $(LINK.o) -shared $(sysdep-LDFLAGS) $(rtld-LDFLAGS) $(LDFLAGS.so) \
 938                   -x c /dev/null -o $@.so -Wl,--verbose -v 2>&1 \
 939         | sed -n -f $< > $@.new
 940         test -s $@.new
 941         rm -f $@.so
 942 endif
 943         mv -f $@.new $@
 944 common-generated += format.lds
 945
 946 ifndef subdir
 947 # What we install as libc.so for programs to link against is in fact a
 948 # link script.  It contains references for the various libraries we need.
 949 # The libc.so object is not complete since some functions are only defined
 950 # in libc_nonshared.a.
 951 # We need to use absolute paths since otherwise local copies (if they exist)
 952 # of the files are taken by the linker.
 953 install: $(inst_libdir)/libc.so
 954 $(inst_libdir)/libc.so: $(common-objpfx)format.lds \
 955                         $(common-objpfx)libc.so$(libc.so-version) \
 956                         $(inst_libdir)/$(patsubst %,$(libtype.oS),\
 957                                                   $(libprefix)$(libc-name)) \
 958                         $(+force)
 959         (echo '/* GNU ld script';\
 960          echo '   Use the shared library, but some functions are only in';\
 961          echo '   the static library, so try that secondarily.  */';\
 962          cat $<; \
 963          echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \
 964               '$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\
 965               ' AS_NEEDED (' $(rtlddir)/$(rtld-installed-name) ') )' \
 966         ) > $@.new
 967         mv -f $@.new $@
 968
 969 endif
 970
 971 else
 972 install: $(inst_slibdir)/libc.so
 973 $(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force)
 974         $(do-install-program)
 975 endif
 976
 977 ifneq (,$(versioned))
 978 # Produce three sets of rules as above for all the smaller versioned libraries.
 979
 980 define o-iterator-doit
 981 $(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link)
 982 endef
 983 object-suffixes-left := $(filter-out $(install-lib-ldscripts),$(versioned))
 984 ifneq (,$(object-suffixes-left))
 985 include $(o-iterator)
 986 endif
 987
 988 # Make symlinks in the build directory, because the versioned names might
 989 # be referenced by a DT_NEEDED in another library.
 990 define o-iterator-doit
 991 $(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
 992 endef
 993 object-suffixes-left := $(versioned)
 994 include $(o-iterator)
 995
 996 generated += $(foreach o,$(versioned),$o$($o-version))
 997
 998 ifeq (,$($(subdir)-version))
 999 define o-iterator-doit
1000 $(inst_slibdir)/$o$($o-version): $(inst_slibdir)/$(o:.so=)-$(version).so \
1001                                  $(+force);
1002         $$(make-shlib-link)
1003 endef
1004 object-suffixes-left := $(versioned)
1005 include $(o-iterator)
1006
1007 define o-iterator-doit
1008 $(inst_slibdir)/$(o:.so=)-$(version).so: $(objpfx)$o $(+force);
1009         $$(do-install-program)
1010 endef
1011 object-suffixes-left := $(versioned)
1012 include $(o-iterator)
1013 else
1014 define o-iterator-doit
1015 $(inst_slibdir)/$o$($o-version): \
1016   $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so $(+force);
1017         $$(make-shlib-link)
1018 endef
1019 object-suffixes-left := $(versioned)
1020 include $(o-iterator)
1021
1022 define o-iterator-doit
1023 $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so: $(objpfx)$o $(+force);
1024         $$(do-install-program)
1025 endef
1026 object-suffixes-left := $(versioned)
1027 include $(o-iterator)
1028 endif
1029 endif
1030
1031 define do-install-so
1032 $(do-install-program)
1033 $(patsubst %,ln -s -f $(@F) $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
1034            $(filter-out %.so,$@))
1035 endef
1036
1037 so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
1038 $(foreach v,$(so-versions),\
1039           $(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \
1040                                                $(+force)
1041         $(do-install-so)
1042 $(foreach v,$(so-versions),\
1043           $(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force)
1044         $(do-install-so)
1045 endif
1046
1047 ifdef install-bin
1048 $(addprefix $(inst_bindir)/,$(install-bin)): \
1049     $(inst_bindir)/%: $(objpfx)% $(+force)
1050         $(do-install-program)
1051 endif
1052 ifdef install-bin-script
1053 $(addprefix $(inst_bindir)/,$(install-bin-script)): \
1054     $(inst_bindir)/%: $(objpfx)% $(+force)
1055         $(do-install-script)
1056 endif
1057 ifdef install-rootsbin
1058 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \
1059    $(inst_rootsbindir)/%: $(objpfx)% $(+force)
1060         $(do-install-program)
1061 endif
1062 ifdef install-sbin
1063 $(addprefix $(inst_sbindir)/,$(install-sbin)): \
1064     $(inst_sbindir)/%: $(objpfx)% $(+force)
1065         $(do-install-program)
1066 endif
1067 ifdef install-lib
1068 install-lib.a := $(filter lib%.a,$(install-lib))
1069 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
1070 ifdef install-lib-non.a
1071 $(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
1072   $(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force)
1073         $(do-install)
1074 endif
1075 ifdef install-lib.a
1076 $(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \
1077   $(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force)
1078         $(do-install)
1079 endif
1080 endif
1081 ifdef install-data
1082 $(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force)
1083         $(do-install)
1084 endif
1085 headers := $(strip $(headers))
1086 ifdef headers
1087 # This implicit rule installs headers from the source directory.
1088 # It may be ignored in preference to rules from sysd-rules to find
1089 # headers in the sysdeps tree.
1090 $(inst_includedir)/%.h: $(objpfx)%.h $(+force)
1091         $(do-install)
1092 $(inst_includedir)/%.h: $(common-objpfx)%.h $(+force)
1093         $(do-install)
1094 $(inst_includedir)/%.h: %.h $(+force)
1095         $(do-install)
1096 $(inst_includedir)/%.h: $(..)include/%.h $(+force)
1097         $(do-install)
1098 headers-nonh := $(filter-out %.h,$(headers))
1099 ifdef headers-nonh
1100 $(addprefix $(inst_includedir)/,$(headers-nonh)): $(inst_includedir)/%: \
1101                                                  % $(+force)
1102         $(do-install)
1103 endif   # headers-nonh
1104 endif   # headers
1105
1106 .PHONY: install-bin-nosubdir install-bin-script-nosubdir \
1107         install-rootsbin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
1108         install-data-nosubdir install-headers-nosubdir
1109 install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin))
1110 install-bin-script-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin-script))
1111 install-rootsbin-nosubdir: \
1112         $(addprefix $(inst_rootsbindir)/,$(install-rootsbin))
1113 install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin))
1114 install-lib-nosubdir: $(addprefix $(inst_libdir)/,\
1115                        $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
1116                        $(addprefix $(libprefix),$(install-lib-non.a)))
1117 install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data))
1118 install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers))
1119 install-others-nosubdir: $(install-others)
1120 install-others-programs-nosubdir: $(install-others-programs)
1121
1122 # We need all the `-nosubdir' targets so that `install' in the parent
1123 # doesn't depend on several things which each iterate over the subdirs.
1124 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
1125 # subroutine.  Then in the parent `install-FOO' also causes subdir makes.
1126 install-%:: install-%-nosubdir ;
1127
1128 .PHONY: install install-no-libc.a-nosubdir
1129 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir \
1130                             install-lib-nosubdir install-others-nosubdir
1131 ifeq ($(build-programs),yes)
1132 install-no-libc.a-nosubdir: install-bin-nosubdir install-bin-script-nosubdir \
1133                             install-rootsbin-nosubdir install-sbin-nosubdir \
1134                             install-others-programs-nosubdir
1135 endif
1136 install: install-no-libc.a-nosubdir
1137 \f
1138 # Command to compile $< using the native libraries.
1139 define native-compile
1140 $(make-target-directory)
1141 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
1142             $< $(OUTPUT_OPTION) $(BUILD_LDFLAGS)
1143 endef
1144
1145 # We always want to use configuration definitions.
1146 ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) -D_GNU_SOURCE \
1147                    -DIS_IN_build -include $(common-objpfx)config.h
1148
1149 # Support the GNU standard name for this target.
1150 .PHONY: check
1151 check: tests
1152 # Special target to run tests which cannot be run unconditionally.
1153 # Maintainers should use this target.
1154 .PHONY: xcheck
1155 xcheck: xtests
1156
1157 all-nonlib = $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) $(others))
1158 ifneq (,$(all-nonlib))
1159 cpp-srcs-left = $(all-nonlib:=.c) $(all-nonlib:=.cc)
1160 lib := nonlib
1161 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
1162 endif
1163
1164 # The include magic above causes those files to use this variable for flags.
1165 CPPFLAGS-nonlib = -DNOT_IN_libc=1
1166
1167
1168 ifeq ($(build-shared),yes)
1169 # Generate normalized lists of symbols, versions, and data sizes.
1170 # This is handy for checking against existing library binaries.
1171
1172 %.symlist: $(..)scripts/abilist.awk %.dynsym
1173         LC_ALL=C $(AWK) -f $^ > $@T
1174         mv -f $@T $@
1175
1176 %.dynsym: %.so
1177         LC_ALL=C $(OBJDUMP) --dynamic-syms $< > $@T
1178         mv -f $@T $@
1179
1180 # A sysdeps/.../Makefile can set abilist-pattern to something like
1181 # %-foo.abilist to look for libc-foo.abilist instead of libc.abilist.
1182 # This makes sense if multiple ABIs can be most cleanly supported by a
1183 # configuration without using separate sysdeps directories for each.
1184 ifdef abilist-pattern
1185 vpath $(abilist-pattern) $(+sysdep_dirs)
1186 endif
1187
1188 vpath %.abilist $(+sysdep_dirs)
1189
1190 # The .PRECIOUS rule prevents the files built by an implicit rule whose
1191 # target pattern is %.symlist from being considered "intermediate files"
1192 # and automatically removed.  We only want these files to be removed by
1193 # 'make clean', which is handled by the 'generated' variable.
1194 .PRECIOUS: %.symlist
1195 generated += $(extra-libs:=.symlist)
1196
1197 ifdef abilist-pattern
1198 $(objpfx)check-abi-%.out: $(common-objpfx)config.make $(abilist-pattern) \
1199                           $(objpfx)%.symlist
1200         $(check-abi-pattern); \
1201         $(evaluate-test)
1202 $(objpfx)check-abi-%.out: $(common-objpfx)config.make $(abilist-pattern) \
1203                           $(common-objpfx)%.symlist
1204         $(check-abi-pattern); \
1205         $(evaluate-test)
1206 endif
1207 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1208                           $(objpfx)%.symlist
1209         $(check-abi); \
1210         $(evaluate-test)
1211 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1212                           $(common-objpfx)%.symlist
1213         $(check-abi); \
1214         $(evaluate-test)
1215 define check-abi-pattern
1216         diff -p -U 0 $(filter $(abilist-pattern),$^) $(filter %.symlist,$^) \
1217              > $@
1218 endef
1219 define check-abi
1220         diff -p -U 0 $(filter %.abilist,$^) $(filter %.symlist,$^) > $@
1221 endef
1222
1223 ifdef abilist-pattern
1224 update-abi-%: $(objpfx)%.symlist $(abilist-pattern)
1225         $(update-abi-pattern)
1226 update-abi-%: $(common-objpfx)%.symlist $(abilist-pattern)
1227         $(update-abi-pattern)
1228 endif
1229 update-abi-%: $(objpfx)%.symlist %.abilist
1230         $(update-abi)
1231 update-abi-%: $(common-objpfx)%.symlist %.abilist
1232         $(update-abi)
1233 define update-abi-pattern
1234 @if cmp -s $^ 2> /dev/null; \
1235  then \
1236       echo '+++ $(filter $(abilist-pattern),$^) is unchanged'; \
1237  else cp -f $^; \
1238       echo '*** Now check $(filter $(abilist-pattern),$^) changes for correctness ***'; \
1239  fi
1240 endef
1241 define update-abi
1242 @if cmp -s $^ 2> /dev/null; \
1243  then \
1244       echo '+++ $(filter %.abilist,$^) is unchanged'; \
1245  else cp -f $^; \
1246       echo '*** Now check $(filter %.abilist,$^) changes for correctness ***'; \
1247  fi
1248 endef
1249
1250 .PHONY: update-abi check-abi
1251 update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned))
1252 check-abi-list = $(patsubst %.so,$(objpfx)check-abi-%.out, \
1253                                  $(install-lib.so-versioned))
1254 check-abi: $(check-abi-list)
1255 ifdef subdir
1256 subdir_check-abi: check-abi
1257 subdir_update-abi: update-abi
1258 else
1259 check-abi: subdir_check-abi
1260         if grep -q '^FAIL:' $(objpfx)*/check-abi*.test-result; then exit 1; fi
1261 update-abi: subdir_update-abi
1262 endif
1263
1264 ifeq ($(subdir),elf)
1265 check-abi: $(objpfx)check-abi-libc.out
1266 tests-special += $(objpfx)check-abi-libc.out
1267 update-abi: update-abi-libc
1268 common-generated += libc.symlist
1269 endif
1270
1271 ifeq ($(build-shared),yes)
1272 ifdef subdir
1273 tests-special += $(check-abi-list)
1274 endif
1275 endif
1276
1277 endif
1278
1279 # These will have been set by sysdeps/posix/Makefile.
1280 L_tmpnam  ?= 1
1281 TMP_MAX   ?= 0
1282 L_ctermid ?= 1
1283 L_cuserid ?= 1
1284
1285 stdio_lim = $(common-objpfx)bits/stdio_lim.h
1286
1287 $(stdio_lim:lim.h=%.h) $(stdio_lim:lim.h=%.d): $(stdio_lim:lim.h=%.st); @:
1288 $(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \
1289                    $(common-objpfx)config.make
1290         $(make-target-directory)
1291         { echo '#include "$(..)posix/bits/posix1_lim.h"';               \
1292           echo '#define _LIBC 1';                                       \
1293           echo '#include "$(..)misc/sys/uio.h"'; } |                    \
1294         $(CC) -E -dM -MD -MP -MF $(@:st=dT) -MT '$(@:st=h) $(@:st=d)'   \
1295               $(CPPUNDEFS) $(+includes) -xc - -o $(@:st=hT)
1296         sed $(sed-remove-objpfx) $(sed-remove-dotdot)                   \
1297             $(@:st=dT) > $(@:st=dt)
1298         mv -f $(@:st=dt) $(@:st=d)
1299         fopen_max=`sed -n 's/^#define OPEN_MAX //1p' $(@:st=hT)`;       \
1300         filename_max=`sed -n 's/^#define PATH_MAX //1p' $(@:st=hT)`;    \
1301         iov_max=`sed -n 's/^#define UIO_MAXIOV //p' $(@:st=hT)`;        \
1302         fopen_max=$${fopen_max:-16};                                    \
1303         filename_max=$${filename_max:-1024};                            \
1304         if [ -z "$$iov_max" ]; then                                     \
1305           define_iov_max="# undef IOV_MAX";                             \
1306         else                                                            \
1307           define_iov_max="# define IOV_MAX $$iov_max";                  \
1308         fi;                                                             \
1309         sed -e "s/@FOPEN_MAX@/$$fopen_max/"                             \
1310             -e "s/@FILENAME_MAX@/$$filename_max/"                       \
1311             -e "s/@L_tmpnam@/$(L_tmpnam)/"                              \
1312             -e "s/@TMP_MAX@/$(TMP_MAX)/"                                \
1313             -e "s/@L_ctermid@/$(L_ctermid)/"                            \
1314             -e "s/@L_cuserid@/$(L_cuserid)/"                            \
1315             -e "s/@define_IOV_MAX@/$$define_iov_max/"                   \
1316             $< > $(@:st=h.new)
1317         $(move-if-change) $(@:st=h.new) $(@:st=h)
1318 # Remove these last so that they can be examined if something went wrong.
1319         rm -f $(@:st=hT) $(@:st=dT) $(@:st=dt)
1320         touch $@
1321 # Get dependencies.
1322 ifndef no_deps
1323 -include $(stdio_lim:h=d)
1324 endif
1325 common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st
1326 \f
1327 FORCE:
1328
1329 .PHONY: echo-headers
1330 echo-headers:
1331         @echo $(headers)
1332
1333 %.bz2: %; bzip2 -9vk $<
1334 %.gz: %; gzip -9vnc $< > $@.new && mv -f $@.new $@
1335 %.xz: %; xz -9evk $<
1336 \f
1337 # Common cleaning targets.
1338
1339 .PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean
1340 clean: common-clean
1341 mostlyclean: common-mostlyclean
1342
1343 do-tests-clean:
1344         -rm -f $(addprefix $(objpfx),$(addsuffix .out,$(tests) $(xtests) \
1345                                                       $(test-srcs)) \
1346                                      $(addsuffix .test-result,$(tests) \
1347                                                               $(xtests) \
1348                                                               $(test-srcs)))
1349
1350 # Remove the object files.
1351 common-mostlyclean:
1352         -rm -f $(addprefix $(objpfx),$(tests) $(xtests) $(test-srcs) \
1353                                      $(others) $(sysdep-others) stubs \
1354                                      $(addsuffix .o,$(tests) $(xtests) \
1355                                                     $(test-srcs) $(others) \
1356                                                     $(sysdep-others)) \
1357                                      $(addsuffix .out,$(tests) $(xtests) \
1358                                                       $(test-srcs)) \
1359                                      $(addsuffix .test-result,$(tests) \
1360                                                               $(xtests) \
1361                                                               $(test-srcs)))
1362         -rm -f $(addprefix $(objpfx),$(extra-objs) $(extra-test-objs) \
1363                                      $(install-lib) $(install-lib.so) \
1364                                      $(install-lib.so:%.so=%_pic.a))
1365         -rm -f core
1366         -rm -f $(objpfx)rtld-*.os
1367         $(rmobjs)
1368 define rmobjs
1369 $(foreach o,$(object-suffixes-for-libc),
1370 -rm -f $(objpfx)stamp$o $(o-objects))
1371 endef
1372
1373 # Also remove the dependencies and generated source files.
1374 common-clean: common-mostlyclean
1375         -rm -f $(addprefix $(objpfx),$(generated))
1376         -rm -f $(objpfx)*.d $(objpfx)*.dt
1377         -rm -fr $(addprefix $(objpfx),$(generated-dirs))
1378         -rm -f $(addprefix $(common-objpfx),$(common-generated))
1379         -rm -f $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
1380 \f
1381 # Produce a file `stubs' which contains `#define __stub_FUNCTION'
1382 # for each function which is a stub.
1383
1384 ifdef objpfx
1385 .PHONY: stubs # The parent Makefile calls this target.
1386 stubs: $(objpfx)stubs
1387 endif
1388 objs-for-stubs := $(foreach o,$(object-suffixes-for-libc),$(o-objects)) \
1389                   $(addprefix $(objpfx),$(extra-objs))
1390 $(objpfx)stubs: $(objs-for-stubs)
1391 ifneq (,$(strip $(objs-for-stubs)))
1392         (cd $(objpfx).; $(OBJDUMP) -h $(patsubst $(objpfx)%,%,$^)) | \
1393         $(AWK) '/\.gnu\.glibc-stub\./ { \
1394                   sub(/\.gnu\.glibc-stub\./, "", $$2); \
1395                   stubs[$$2] = 1; } \
1396                 END { for (s in stubs) print "#define __stub_" s }' > $@T
1397         mv -f $@T $@
1398 else
1399         > $@
1400 endif
1401 \f
1402 ifneq (,$(strip $(gpl2lgpl)))
1403 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
1404 # Snarf from the master source and frob the copying notice.
1405 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
1406         sed -f $^ > $@-tmp
1407 # So I don't edit them by mistake.
1408         chmod a-w $@-tmp
1409         mv -f $@-tmp $@
1410 endif
1411 endif
1412
1413 # Local Variables:
1414 # mode: makefile
1415 # End: