Makerules

   1 # Copyright (C) 1991-2024 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 # <https://www.gnu.org/licenses/>.
  17
  18 #
  19 #       Common rules for making the GNU C library.  This file is included
  20 #       by the top-level Makefile and by all subdirectory makefiles
  21 #       (through Rules).
  22 #
  23 ifneq (,)
  24 This makefile requires GNU Make.
  25 endif
  26
  27 REQUIRED_MAKE_VERSION = 3.74
  28 REAL_MAKE_VERSION = $(firstword $(MAKE_VERSION))
  29
  30 ifneq ($(REQUIRED_MAKE_VERSION), \
  31        $(firstword $(sort $(REAL_MAKE_VERSION) $(REQUIRED_MAKE_VERSION))))
  32 Wrong GNU Make version.  See above for the version needed.
  33 endif
  34
  35
  36 ifdef   subdir
  37 ..      := ../
  38 endif   # subdir
  39
  40 # If `sources' was defined by the parent makefile, undefine it so
  41 # we will later get it from wildcard search in this directory.
  42 ifneq   "$(findstring env,$(origin sources))" ""
  43 sources :=
  44 endif
  45
  46 oPATH := $(PATH)
  47 PATH := this definition should take precedence over $(oPATH)
  48 ifeq ($(PATH),$(oPATH))
  49 You must not use the -e flag when building the GNU C library.
  50 else
  51 PATH := $(oPATH)
  52 endif
  53 \f
  54 ifndef +included-Makeconfig
  55 include $(..)Makeconfig
  56 endif
  57
  58 # This variable is used in ``include $(o-iterator)'' after defining
  59 # $(o-iterator-doit) to produce some desired rule using $o for the object
  60 # suffix, and setting $(object-suffixes-left) to $(object-suffixes); a copy
  61 # is produced for each object suffix in use.
  62 o-iterator = $(patsubst %,$(..)o-iterator.mk,$(object-suffixes-left))
  63 \f
  64 # Include any system-specific makefiles.
  65
  66 # This is here so things in sysdep Makefiles can easily depend on foo.h as
  67 # appropriate and not worry about where foo.h comes from, which may be
  68 # system dependent and not known by that Makefile.
  69 vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
  70                                       $(+sysdep_dirs) $(..)))
  71
  72 # The same is true for RPC source files.
  73 vpath %.x $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
  74                                       $(+sysdep_dirs) $(..)))
  75
  76 # Some sysdep makefiles use this to distinguish being included here from
  77 # being included individually by a subdir makefile (hurd/Makefile needs this).
  78 in-Makerules := yes
  79
  80 sysdep-makefiles := $(wildcard $(sysdirs:=/Makefile))
  81 ifneq (,$(sysdep-makefiles))
  82 include $(sysdep-makefiles)
  83 endif
  84
  85
  86 # Reorder before-compile so that mach things come first, and hurd things
  87 # second, before all else.  The mach and hurd subdirectories have many
  88 # generated header files which the much of rest of the library depends on,
  89 # so it is best to build them first (and mach before hurd, at that).
  90 before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\
  91                            $(before-compile)) \
  92                   $(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
  93                                $(before-compile))
  94
  95 # Even before that, we need abi-versions.h which is generated right here.
  96 ifeq ($(build-shared),yes)
  97 ifndef avoid-generated
  98 before-compile := $(common-objpfx)abi-versions.h $(before-compile)
  99 $(common-objpfx)abi-versions.h: $(..)scripts/abi-versions.awk \
 100                                 $(common-objpfx)Versions.all
 101         LC_ALL=C $(AWK) -f $^ > $@T
 102         mv -f $@T $@
 103
 104 $(common-objpfx)%.latest: $(common-objpfx)abi-versions.h
 105         sed -n '/ VERSION_$*_/{s/^.*_\([A-Z0-9_]*\).*$$/\1/;h;};$${g;p;}' \
 106             $(common-objpfx)abi-versions.h > $@T
 107         mv -f $@T $@
 108
 109 # first-versions.h and ldbl-compat-choose.h provide macros used in
 110 # various symbol versioning macro calls.
 111 before-compile := $(common-objpfx)first-versions.h \
 112                   $(common-objpfx)ldbl-compat-choose.h $(before-compile)
 113 $(common-objpfx)first-versions.h: $(common-objpfx)versions.stmp
 114 $(common-objpfx)ldbl-compat-choose.h: $(common-objpfx)versions.stmp
 115 endif # avoid-generated
 116 endif # $(build-shared) = yes
 117
 118 ifndef avoid-generated
 119 ifneq (,$(CXX))
 120 # If C++ headers <cstdlib> or <cmath> are used, GCC 6 will include
 121 # /usr/include/stdlib.h or /usr/include/math.h from "#include_next"
 122 # (instead of stdlib/stdlib.h or math/math.h in the glibc source
 123 # directory), and this turns up as a make dependency.  An implicit
 124 # rule will kick in and make will try to install stdlib/stdlib.h or
 125 # math/math.h as /usr/include/stdlib.h or /usr/include/math.h because
 126 # the target is out of date.  We make a copy of <cstdlib> and <cmath>
 127 # in the glibc build directory so that stdlib/stdlib.h and math/math.h
 128 # will be used instead of /usr/include/stdlib.h and /usr/include/math.h.
 129 before-compile := $(common-objpfx)cstdlib $(common-objpfx)cmath \
 130                   $(before-compile)
 131 $(common-objpfx)cstdlib: $(c++-cstdlib-header)
 132         $(INSTALL_DATA) $< $@T
 133         $(move-if-change) $@T $@
 134 $(common-objpfx)cmath: $(c++-cmath-header)
 135         $(INSTALL_DATA) $< $@T
 136         $(move-if-change) $@T $@
 137 ifneq (,$(c++-bits-std_abs-h))
 138 # Also make a copy of <bits/std_abs.h> from GCC 7 to prevent it from
 139 # including /usr/include/stdlib.h.
 140 before-compile := $(common-objpfx)bits/std_abs.h $(before-compile)
 141 $(common-objpfx)bits/std_abs.h: $(c++-bits-std_abs-h)
 142         $(INSTALL_DATA) $< $@T
 143         $(move-if-change) $@T $@
 144 endif
 145 endif
 146
 147 before-compile := $(common-objpfx)libc-abis.h $(before-compile)
 148 $(common-objpfx)libc-abis.h: $(common-objpfx)libc-abis.stamp; @:
 149 $(common-objpfx)libc-abis.stamp: $(..)scripts/gen-libc-abis \
 150                              $(firstword $(wildcard $(sysdirs:=/libc-abis)) \
 151                                          $(..)libc-abis) \
 152                              $(..)Makerules
 153         $(SHELL) $< \
 154                  $(base-machine)-$(config-vendor)-$(config-os) \
 155                  < $(word 2,$^) > $(@:.stamp=.h)T
 156         $(move-if-change) $(@:.stamp=.h)T $(@:.stamp=.h)
 157         touch $@
 158 common-generated += $(common-objpfx)libc-abis.h
 159 endif # avoid-generated
 160
 161 ifeq (yes,$(build-shared))
 162 $(common-objpfx)runtime-linker.h: $(common-objpfx)runtime-linker.stamp; @:
 163 $(common-objpfx)runtime-linker.stamp: $(common-objpfx)config.make
 164         $(make-target-directory)
 165         echo '#define RUNTIME_LINKER "$(rtlddir)/$(rtld-installed-name)"' \
 166                 > ${@:stamp=T}
 167         $(move-if-change) ${@:stamp=T} ${@:stamp=h}
 168         touch $@
 169 endif
 170
 171 # Make sure the subdirectory for object files gets created.
 172 ifdef objpfx
 173 ifeq (,$(wildcard $(objpfx).))
 174 before-compile += $(objpfx).
 175 $(objpfx).:
 176         $(make-target-directory)
 177 endif
 178 endif
 179
 180 # Remove existing files from `before-compile'.  Things are added there when
 181 # they must exist for dependency generation to work right, but once they
 182 # exist there is no further need for every single file to depend on them,
 183 # and those gratuitous dependencies result in many gratuitous
 184 # recompilations.
 185 before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
 186
 187 # Don't let any before-compile file be an intermediate and get removed.
 188 ifdef before-compile
 189 $(before-compile):
 190 endif
 191
 192 # We don't want $(common-objpfx) files to depend on miscellaneous stuff
 193 # in subdirs.
 194 ifdef subdir
 195 common-before-compile := $(filter-out $(objpfx)%,$(before-compile))
 196 else
 197 common-before-compile = $(before-compile)
 198 endif
 199
 200 ifndef subdir
 201 # If a makefile needs to do something conditional on something that
 202 # can only be figured out from headers, write a FOO.make.c input
 203 # file that uses cpp constructs and contains @@@ LINE @@@ for each LINE
 204 # to emit in the generated makefile, and use -include $(common-objpfx)FOO.make.
 205 #
 206 # We only generate these in the top-level makefile, to avoid any weirdness
 207 # from subdir-specific makefile tweaks creeping in on an update.
 208 $(common-objpfx)%.make: $(..)%.make.c $(..)Makerules $(common-before-compile)
 209         rm -f $@T $@.dT
 210         (echo '# Generated from $*.make.c by Makerules.'; \
 211          $(CC) $(CFLAGS) $(CPPFLAGS) -E -DASSEMBLER $< \
 212                -MD -MP -MT '$$(common-objpfx)$*.make' -MF $@.dT \
 213          | sed -n '/@@@/{s/@@@[  ]*\(.*\)@@@/\1/;s/[     ]*$$//p;}'; \
 214          echo 'common-generated += $(@F)'; \
 215          sed $(sed-remove-objpfx) $(sed-remove-dotdot) $@.dT; \
 216          rm -f $@.dT) > $@T
 217         mv -f $@T $@
 218 endif
 219
 220 ifdef subdir
 221 sed-remove-dotdot := -e 's@  *\.\.\/\([^        \]*\)@ $$(..)\1@g' \
 222                      -e 's@^\.\.\/\([^  \]*\)@$$(..)\1@g'
 223 else
 224 sed-remove-dotdot := -e 's@  *\([^      \/$$][^         \]*\)@ $$(..)\1@g' \
 225                      -e 's@^\([^        \/$$][^         \]*\)@$$(..)\1@g'
 226 endif
 227
 228 ifdef gen-py-const-headers
 229 # We'll use a static pattern rule to match .pysym files with their
 230 # corresponding generated .py files.
 231 # The generated .py files go in the submodule's dir in the glibc build dir.
 232 py-const-files := $(patsubst %.pysym,%.py,$(gen-py-const-headers))
 233 py-const-dir := $(objpfx)
 234 py-const := $(addprefix $(py-const-dir),$(py-const-files))
 235 py-const-script := $(..)scripts/gen-as-const.py
 236
 237 # This is a hack we use to generate .py files with constants for
 238 # Python code.
 239 #
 240 # $@.tmp is a temporary file we use to store the partial contents of
 241 # the target file.  We do this instead of just writing on $@ because,
 242 # if the build process terminates prematurely, re-running Make
 243 # wouldn't run this rule since Make would see that the target file
 244 # already exists (despite it being incomplete).
 245 #
 246 # The output is redirected to a .py file; we'll import it in the main
 247 # Python code to read the constants generated by gen-as-const.py.
 248 $(py-const): $(py-const-dir)%.py: %.pysym $(py-const-script) \
 249              $(common-before-compile)
 250         $(make-target-directory)
 251         $(PYTHON) $(py-const-script) --python \
 252                   --cc="$(CC) $(CFLAGS) $(CPPFLAGS)" $< \
 253                   > $@.tmp
 254         mv -f $@.tmp $@
 255
 256 generated += $(py-const)
 257 endif  # gen-py-const-headers
 258
 259 ifdef gen-as-const-headers
 260 # Generating headers for assembly constants.
 261 # We need this defined early to get into before-compile before
 262 # it's used in sysd-rules, below.
 263 # Define GEN_AS_CONST_HEADERS to avoid circular dependency [BZ #22792].
 264 # NB: <tcb-offsets.h> is generated from tcb-offsets.sym to define
 265 # offsets and sizes of types in <tls.h> and maybe <pthread.h> which
 266 # may include <tcb-offsets.h>.  Target header files can check if
 267 # GEN_AS_CONST_HEADERS is defined to avoid circular dependency which
 268 # may lead to build hang on a many-core machine.
 269 $(common-objpfx)%.h $(common-objpfx)%.h.d: $(..)scripts/gen-as-const.py \
 270                                            %.sym $(common-before-compile)
 271         $(PYTHON) $< --cc="$(CC) $(CFLAGS) $(CPPFLAGS) -DGEN_AS_CONST_HEADERS \
 272                            -MD -MP -MF $(@:.h=.h.d)T \
 273                            -MT '$(@:.h=.h.d) $(@:.h.d=.h)'" \
 274                   $(filter %.sym,$^) > $(@:.h.d=.h)T
 275         sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
 276             $(@:.h=.h.d)T > $(@:.h=.h.d)T2
 277         rm -f $(@:.h=.h.d)T
 278         mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d)
 279         mv -f $(@:.h.d=.h)T $(@:.h.d=.h)
 280 vpath %.sym $(sysdirs)
 281 before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 282
 283 tests-internal += $(gen-as-const-headers:%.sym=test-as-const-%)
 284 generated += $(gen-as-const-headers:%.sym=test-as-const-%.c)
 285 $(objpfx)test-as-const-%.c: $(..)scripts/gen-as-const.py $(..)Makerules \
 286                             %.sym $(common-objpfx)%.h
 287         ($(AWK) '{ sub(/^/, "asconst_", $$2); print; }' $(filter %.h,$^); \
 288          $(PYTHON) $< --test $(filter %.sym,$^)) > $@T
 289         mv -f $@T $@
 290 endif
 291 \f
 292 ifeq (yes,$(build-shared))
 293 # Generate the header containing the names of all shared libraries.
 294 # We use a stamp file to avoid unnecessary recompilations.
 295 before-compile += $(common-objpfx)gnu/lib-names.h
 296 ifeq ($(soversions.mk-done),t)
 297 ifndef abi-variants
 298 lib-names-h-abi = gnu/lib-names.h
 299 lib-names-stmp-abi = gnu/lib-names.stmp
 300 else
 301 lib-names-h-abi = gnu/lib-names-$(default-abi).h
 302 lib-names-stmp-abi = gnu/lib-names-$(default-abi).stmp
 303 before-compile += $(common-objpfx)$(lib-names-h-abi)
 304 common-generated += gnu/lib-names.h
 305 install-others-nosubdir: $(inst_includedir)/$(lib-names-h-abi)
 306 $(common-objpfx)gnu/lib-names.h:
 307         $(make-target-directory)
 308         { \
 309          echo '/* This file is automatically generated.';\
 310          echo '   It defines macros to allow user program to find the shared'; \
 311          echo '   library files which come as part of GNU libc.  */'; \
 312          echo '#ifndef __GNU_LIB_NAMES_H'; \
 313          echo '#define __GNU_LIB_NAMES_H        1'; \
 314          echo ''; \
 315          $(if $(abi-includes), \
 316           $(foreach h,$(abi-includes), echo '#include <$(h)>';) \
 317           echo '';) \
 318          $(foreach v,$(abi-variants),\
 319          $(if $(abi-$(v)-condition),\
 320          echo '#if $(abi-$(v)-condition)'; \
 321          echo '# include <gnu/lib-names-$(v).h>'); \
 322          $(if $(abi-$(v)-condition),echo '#endif';)) \
 323          echo ''; \
 324          echo '#endif   /* gnu/lib-names.h */'; \
 325         } >  $@
 326 endif
 327 $(common-objpfx)$(lib-names-h-abi): $(common-objpfx)$(lib-names-stmp-abi); @:
 328 $(common-objpfx)$(lib-names-stmp-abi): $(..)scripts/lib-names.awk \
 329                                        $(common-objpfx)soversions.i
 330         $(make-target-directory)
 331         { \
 332          $(if $(abi-variants), \
 333          echo '/* This file is automatically generated.  */';\
 334          echo '#ifndef __GNU_LIB_NAMES_H'; \
 335          echo '# error "Never use <$(lib-names-h-abi)> directly; include <gnu/lib-names.h> instead."'; \
 336          echo '#endif';, \
 337          echo '/* This file is automatically generated.';\
 338          echo '   It defines macros to allow user program to find the shared'; \
 339          echo '   library files which come as part of GNU libc.  */'; \
 340          echo '#ifndef __GNU_LIB_NAMES_H'; \
 341          echo '#define __GNU_LIB_NAMES_H        1';) \
 342          echo ''; \
 343          ($(foreach s,$(all-sonames), echo $(s);)) \
 344          | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort; \
 345          $(if $(abi-variants),, \
 346          echo ''; \
 347          echo '#endif   /* gnu/lib-names.h */';) \
 348         } >  ${@:stmp=T}
 349         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
 350         touch $@
 351 endif
 352 common-generated += $(lib-names-h-abi) $(lib-names-stmp-abi)
 353 endif
 354 \f
 355 ###############################################################################
 356 # NOTE!  Everything adding to before-compile needs to come before this point! #
 357 ###############################################################################
 358
 359 # Generate an ordered list of implicit rules which find the source files in
 360 # each sysdep directory.  The old method was to use vpath to search all the
 361 # sysdep directories.  However, that had the problem that a .S file in a
 362 # later directory would be chosen over a .c file in an earlier directory,
 363 # which does not preserve the desired sysdeps ordering behavior.
 364
 365 # System-dependent makefiles can put in `inhibit-sysdep-asm' regexps
 366 # matching sysdep directories whose assembly source files should be
 367 # suppressed.
 368
 369 -include $(common-objpfx)sysd-rules
 370 ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
 371 # The value of $(+sysdep_dirs) the sysd-rules was computed for
 372 # differs from the one we are using now.  So force a rebuild of sysd-rules.
 373 sysd-rules-force = FORCE
 374 FORCE:
 375 endif
 376 $(common-objpfx)sysd-rules: $(..)scripts/sysd-rules.awk \
 377                             $(common-objpfx)config.make $(..)Makerules \
 378                             $(sysdep-makefiles) $(sysdep-makeconfigs) \
 379                             $(sysd-rules-force)
 380         -@rm -f $@T
 381         LC_ALL=C $(AWK) -f $< > $@T \
 382                         -v all_object_suffixes='$(all-object-suffixes)' \
 383                         -v inhibit_sysdep_asm='$(inhibit-sysdep-asm)' \
 384                         -v sysd_rules_patterns='$(sysd-rules-patterns)' \
 385                         -v config_sysdirs='$(config-sysdirs)'
 386         mv -f $@T $@
 387
 388 ifndef sysd-rules-done
 389 # Don't do deps until this exists, because it provides rules to make the deps.
 390 no_deps=t
 391 endif
 392
 393 define o-iterator-doit
 394 $(objpfx)%$o: %.S $(before-compile); $$(compile-command.S)
 395 endef
 396 object-suffixes-left := $(all-object-suffixes)
 397 include $(o-iterator)
 398
 399 define o-iterator-doit
 400 $(objpfx)%$o: %.c $(before-compile); $$(compile-command.c)
 401 endef
 402 object-suffixes-left := $(all-object-suffixes)
 403 include $(o-iterator)
 404
 405 define o-iterator-doit
 406 $(objpfx)%$o: %.cc $(before-compile); $$(compile-command.cc)
 407 endef
 408 object-suffixes-left := $(all-object-suffixes)
 409 include $(o-iterator)
 410
 411 # Omit the objpfx rules when building in the source tree, because
 412 # objpfx is empty and so these rules just override the ones above.
 413 ifdef objpfx
 414 # Define first rules to find the source files in $(objpfx).
 415 # Generated source files will end up there.
 416 define o-iterator-doit
 417 $(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S)
 418 endef
 419 object-suffixes-left := $(all-object-suffixes)
 420 include $(o-iterator)
 421
 422 define o-iterator-doit
 423 $(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
 424 endef
 425 object-suffixes-left := $(all-object-suffixes)
 426 include $(o-iterator)
 427
 428 define o-iterator-doit
 429 $(objpfx)%$o: $(objpfx)%.cc $(before-compile); $$(compile-command.cc)
 430 endef
 431 object-suffixes-left := $(all-object-suffixes)
 432 include $(o-iterator)
 433 endif
 434
 435 # Generate .dT files as we compile.
 436 compile-mkdep-flags = -MD -MP -MF $@.dt -MT $@
 437 compile-command.S = $(compile.S) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 438 compile-command.c = $(compile.c) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 439 compile-command.cc = $(compile.cc) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 440
 441 # Like compile-mkdep-flags, but for use with $(BUILD_CC).  We don't want to
 442 # track system includes here, they may spuriously trigger an install rule,
 443 # and would cause the check-local-headers test to fail.
 444 native-compile-mkdep-flags = -MMD -MP -MF $@.dt -MT $@
 445
 446 # GCC can grok options after the file name, and it looks nicer that way.
 447 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
 448 compile.cc = $(CXX) $< -c $(CXXFLAGS) $(CPPFLAGS)
 449 compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \
 450                   $(ASFLAGS) $(ASFLAGS-$(suffix $@)) $(sysdep-ASFLAGS) \
 451                   $(ASFLAGS-$(<F)) $(ASFLAGS-$(@F))
 452 COMPILE.c = $(CC) -c $(CFLAGS) $(CPPFLAGS)
 453 COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \
 454                   $(ASFLAGS) $(ASFLAGS-$(suffix $@)) $(sysdep-ASFLAGS) \
 455                   $(ASFLAGS-$(<F)) $(ASFLAGS-$(@F))
 456
 457 # We need this for the output to go in the right place.  It will default to
 458 # empty if make was configured to work with a cc that can't grok -c and -o
 459 # together.  You can't compile the C library with such a compiler.
 460 OUTPUT_OPTION = -o $@
 461
 462 # This is the end of the pipeline for compiling generated C code.
 463 compile-stdin.c = $(COMPILE.c) -o $@ -x c - $(compile-mkdep-flags)
 464
 465 # We need the $(CFLAGS) to be in there to have the right predefines during
 466 # the dependency run for C sources.  But having it for assembly sources can
 467 # get the wrong predefines.
 468 S-CPPFLAGS = -DASSEMBLER $(asm-CPPFLAGS)
 469
 470 ifneq (,$(objpfx))
 471 # Continuation lines here are dangerous because they introduce spaces!
 472 define sed-remove-objpfx
 473 -e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
 474 -e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g'
 475 endef
 476 endif
 477 \f
 478 # Modify the list of routines we build for different targets
 479
 480 ifeq (yes,$(build-shared))
 481 ifndef libc.so-version
 482 # Undefine this because it can't work when we libc.so is unversioned.
 483 static-only-routines =
 484 endif
 485 endif
 486
 487 elide-routines.oS += $(filter-out $(static-only-routines),\
 488                                   $(routines) $(aux) $(sysdep_routines))
 489 elide-routines.os += $(static-only-routines)
 490
 491 # If we have versioned code we don't need the old versions in any of the
 492 # static libraries.
 493 elide-routines.o  += $(shared-only-routines)
 494 elide-routines.op += $(shared-only-routines)
 495 \f
 496 # Shared library building.
 497
 498 ifeq (yes,$(build-shared))
 499
 500 # Reference map file only when shared libraries are built and a map file name
 501 # is given.
 502 ifeq ($(build-shared),yes)
 503 map-file = $(firstword $($(@F:.so=-map)) \
 504                        $(addprefix $(common-objpfx), \
 505                                    $(filter $(@F:.so=.map),$(version-maps))))
 506 load-map-file = $(map-file:%=-Wl,--version-script=%)
 507 endif
 508
 509 # Compiler arguments to use to link a shared object with libc and
 510 # ld.so.  This is intended to be as similar as possible to a default
 511 # link with an installed libc.
 512 link-libc-args = -Wl,--start-group \
 513                  $(libc-for-link) \
 514                  $(common-objpfx)libc_nonshared.a \
 515                  -Wl,--as-needed $(elf-objpfx)ld.so -Wl,--no-as-needed \
 516                  -Wl,--end-group
 517
 518 # The corresponding shared libc to use.  This may be modified for a
 519 # particular target.
 520 libc-for-link = $(common-objpfx)libc.so
 521
 522 # The corresponding dependencies.  As these are used in dependencies,
 523 # not just commands, they cannot use target-specific variables so need
 524 # to name both possible libc.so objects.
 525 link-libc-deps = $(common-objpfx)libc.so $(common-objpfx)linkobj/libc.so \
 526                  $(common-objpfx)libc_nonshared.a $(elf-objpfx)ld.so
 527
 528 # Pattern rule to build a shared object from an archive of PIC objects.
 529 # This must come after the installation rules so Make doesn't try to
 530 # build shared libraries in place from the installed *_pic.a files.
 531 # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
 532 # on other shared objects.  The linking with libc and ld.so is intended
 533 # to be as similar as possible to a default link with an installed libc.
 534 lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(link-libc-deps)
 535         $(build-shlib) $(link-libc-args)
 536         $(call after-link,$@)
 537
 538 define build-shlib-helper
 539 $(LINK.o) -shared -static-libgcc -Wl,-O1 $(sysdep-LDFLAGS) \
 540           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) $(rtld-LDFLAGS) \
 541           $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(dt-relr-ldflag)) \
 542           $(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \
 543           $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
 544           -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
 545           $(LDFLAGS.so) $(LDFLAGS-lib.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
 546           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 547 endef
 548
 549 define build-shlib
 550 $(build-shlib-helper) -o $@ \
 551           $(csu-objpfx)abi-note.o $(build-shlib-objlist)
 552 endef
 553
 554 define build-module-helper
 555 $(LINK.o) -shared -static-libgcc $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
 556           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
 557           $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(dt-relr-ldflag)) \
 558           -B$(csu-objpfx) $(load-map-file) \
 559           $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
 560           $(link-test-modules-rpath-link) \
 561           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 562 endef
 563
 564 # This macro is similar to build-shlib but it does not define a soname
 565 # and it does not depend on the destination name to start with `lib'.
 566 # binutils only position loadable notes into the first page for binaries,
 567 # not for shared objects
 568 define build-module
 569 $(build-module-helper) -o $@ \
 570           $(csu-objpfx)abi-note.o $(build-module-objlist) $(link-libc-args)
 571 $(call after-link,$@)
 572 endef
 573 define build-module-asneeded
 574 $(build-module-helper) -o $@ \
 575           $(csu-objpfx)abi-note.o \
 576           -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed \
 577           $(link-libc-args)
 578 $(call after-link,$@)
 579 endef
 580
 581 # sofini.os must be placed last since it terminates .eh_frame section.
 582 build-module-helper-objlist = \
 583         $(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\
 584                    $(filter-out %.lds $(map-file) $(+preinit) $(+postinit) \
 585                                 $(elf-objpfx)sofini.os \
 586                                 $(link-libc-deps),$^))
 587
 588 build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so)
 589 build-shlib-objlist = $(build-module-helper-objlist) \
 590                       $(LDLIBS-$(@F:lib%.so=%).so) \
 591                       $(filter $(elf-objpfx)sofini.os,$^)
 592
 593 # Don't try to use -lc when making libc.so itself.
 594 # Also omits crti.o and crtn.o, which we do not want
 595 # since we define our own `.init' section specially.
 596 LDFLAGS-c.so = -nostdlib -nostartfiles
 597 # But we still want to link libc.so against $(libc.so-gnulib).
 598 LDLIBS-c.so += $(libc.so-gnulib)
 599 # Give libc.so an entry point and make it directly runnable itself.
 600 LDFLAGS-c.so += -e __libc_main
 601 # Pre-link the objects of libc_pic.a for .gnu.glibc-stub.* processing.
 602 $(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
 603         $(LINK.o) -nostdlib -nostartfiles -r -o $@ \
 604         $(LDFLAGS-c_pic.os) $(whole-archive) $^ -o $@
 605
 606 # Generate a list of -R options to excise .gnu.glibc-stub.* sections.
 607 $(common-objpfx)libc_pic.opts: $(common-objpfx)libc_pic.os
 608         $(OBJDUMP) -h $< | \
 609         $(AWK) '$$2 ~ /\.gnu\.glibc-stub\./ { print "-R", $$2 }' \
 610                 > $@T
 611         mv -f $@T $@
 612 # Apply those -R options.
 613 $(common-objpfx)libc_pic.os.clean: $(common-objpfx)libc_pic.opts \
 614                                    $(common-objpfx)libc_pic.os
 615         $(OBJCOPY) @$^ $@
 616 generated += libc_pic.opts libc_pic.os.clean
 617
 618 libc_pic_clean := .clean
 619
 620 # Build a possibly-modified version of libc_pic.a for use in building
 621 # linkobj/libc.so.
 622 ifeq (,$(filter sunrpc,$(subdirs)))
 623 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a
 624         $(make-target-directory)
 625         ln -f $< $@
 626 else
 627 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a \
 628                                     $(common-objpfx)sunrpc/librpc_compat_pic.a
 629         $(make-target-directory)
 630         (cd $(common-objpfx)linkobj; \
 631          $(AR) x ../libc_pic.a; \
 632          rm $$($(AR) t ../sunrpc/librpc_compat_pic.a | sed 's/^compat-//'); \
 633          $(AR) x ../sunrpc/librpc_compat_pic.a; \
 634          $(AR) cr libc_pic.a *.os; \
 635          rm *.os)
 636 endif # $(subdirs) contains sunrpc
 637
 638 # Clear link-libc-deps for the libc.so libraries so build-shlibs does not
 639 # filter ld.so out of the list of linked objects.
 640 $(common-objpfx)libc.so: link-libc-deps = # empty
 641 $(common-objpfx)linkobj/libc.so: link-libc-deps = # empty
 642
 643 # Use our own special initializer and finalizer files for the libc.so
 644 # libraries.
 645 $(common-objpfx)libc.so: $(common-objpfx)libc_pic.os$(libc_pic_clean) \
 646                          $(elf-objpfx)sofini.os \
 647                          $(elf-objpfx)interp.os \
 648                          $(elf-objpfx)ld.so
 649         $(build-shlib)
 650         $(call after-link,$@)
 651
 652 $(common-objpfx)linkobj/libc.so: $(common-objpfx)linkobj/libc_pic.a \
 653                          $(elf-objpfx)sofini.os \
 654                          $(elf-objpfx)interp.os \
 655                          $(elf-objpfx)ld.so
 656         $(build-shlib)
 657         $(call after-link,$@)
 658
 659 ifeq ($(build-shared),yes)
 660 $(common-objpfx)libc.so: $(common-objpfx)libc.map
 661 endif
 662 common-generated += libc.so libc_pic.os
 663 ifdef libc.so-version
 664 $(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
 665         $(make-link)
 666 common-generated += libc.so$(libc.so-version)
 667 endif
 668 endif
 669 \f
 670 # Figure out the source filenames in this directory.
 671
 672 override sources := $(addsuffix .c,\
 673                         $(filter-out $(elided-routines),\
 674                             $(routines) $(aux) \
 675                             $(sysdep_routines)))
 676 sysdep_routines := $(sysdep_routines)
 677
 678 headers := $(headers) $(sysdep_headers)
 679
 680 # This is the list of all object files, gotten by
 681 # replacing every ".c" in `sources' with a ".o".
 682 override objects := $(addprefix $(objpfx),$(sources:.c=.o))
 683
 684
 685 # The makefile may define $(extra-libs) with `libfoo libbar'
 686 # to build libfoo.a et al from the modules listed in $(libfoo-routines).
 687 ifdef extra-libs
 688 # extra-lib.mk is included once for each extra lib to define rules
 689 # to build it, and to add its objects to the various variables.
 690 # During its evaluation, $(lib) is set to the name of the library.
 691 extra-libs-left := $(extra-libs)
 692 include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
 693 endif
 694
 695
 696 # The makefile may define $(modules-names) to build additional modules.
 697 # These are built with $(build-module), except any in $(modules-names-nobuild).
 698 # MODULE_NAME=extramodules, except any in $(modules-names-tests).
 699 ifdef modules-names
 700 cpp-srcs-left := $(filter-out $(modules-names-tests),$(modules-names))
 701 ifneq (,$(cpp-srcs-left))
 702 lib := extramodules
 703 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
 704 endif
 705
 706 ifdef modules-names-tests
 707 cpp-srcs-left := $(filter $(modules-names-tests),$(modules-names))
 708 ifneq (,$(cpp-srcs-left))
 709 lib := testsuite
 710 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
 711 endif
 712 endif
 713
 714 extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names))
 715 $(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \
 716                 $(objpfx)%.os $(link-libs-deps)
 717         $(build-module)
 718 endif
 719 \f
 720 +depfiles := $(sources:.c=.d) \
 721              $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \
 722              $(patsubst %.oS,%.d,$(filter %.oS,$(extra-objs))) \
 723              $(patsubst %.o,%.d,$(filter %.o,$(extra-test-objs:.os=.o))) \
 724              $(addsuffix .d,$(tests) $(tests-internal) $(xtests) \
 725                 $(tests-container) $(tests-printers) \
 726                 $(test-srcs) $(tests-time64) $(xtests-time64))
 727 ifeq ($(build-programs),yes)
 728 +depfiles += $(addsuffix .d,$(others) $(sysdep-others))
 729 endif
 730 +depfiles := $(addprefix $(objpfx),\
 731                          $(filter-out $(addsuffix .d,$(omit-deps)),\
 732                                       $(+depfiles)))
 733 all-dt-files := $(foreach o,$(object-suffixes-for-libc),$(+depfiles:.d=$o.dt))
 734 +depfiles := $(patsubst %.dt,%.d,$(wildcard $(all-dt-files))) \
 735              $(wildcard $(all-dt-files:.dt=.d))
 736
 737 # This is a funny rule in that it removes its input file.
 738 %.d: %.dt
 739         @sed $(sed-remove-objpfx) $< > $(@:.d=.T) && \
 740          mv -f $(@:.d=.T) $@ && \
 741          rm -f $<
 742
 743 # Avoid the .h.d files for any .sym files whose .h files don't exist yet.
 744 # They will be generated when they're needed, and trying too early won't work.
 745 +gen-as-const := $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 746 +depfiles += $(addsuffix .d,$(filter $(wildcard $(+gen-as-const)),\
 747                                                 $(+gen-as-const)))
 748
 749 ifdef +depfiles
 750 ifneq ($(no_deps),t)
 751 -include $(+depfiles)
 752 endif
 753 endif
 754 \f\f
 755 # Maximize efficiency by minimizing the number of rules.
 756 .SUFFIXES:      # Clear the suffix list.  We don't use suffix rules.
 757 # Don't define any builtin rules.
 758 MAKEFLAGS := $(MAKEFLAGS) -r
 759
 760 # Generic rule for making directories.
 761 %/:
 762 # mkdir isn't smart enough to strip a trailing /.
 763 # We always require a mkdir which supports the -p option to avoid error
 764 # messages in case of races.
 765         mkdir -p $(@:%/=%)
 766 \f
 767 # Make sure that object files are not removed
 768 # when they are intermediates between sources and library members.
 769 .PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes))
 770
 771 # Make sure that the parent library archive is never removed.
 772 .PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 773 \f
 774 # Use the verbose option of ar and tar when not running silently.
 775 ifeq ($(silent-make),no)                        # if not -s
 776 verbose := v
 777 else                                            # -s
 778 verbose :=
 779 endif                                           # not -s
 780
 781 ARFLAGS := r$(verbose)
 782 CREATE_ARFLAGS := cru$(verbose)
 783 \f
 784 # This makes all the object files in the parent library archive.
 785
 786 .PHONY: lib lib-noranlib
 787 lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 788 lib-noranlib: libobjs
 789
 790 # For object-suffix $o, the list of objects with that suffix.
 791 # Makefiles can define `elide-routines.so = foo' to leave foo.so out.
 792 o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
 793                                                        $(elide-routines$o)),\
 794                                             $(objects))) \
 795             $(addprefix $(objpfx),$(o-objects$o))
 796
 797 others: $(addprefix $(objpfx),$(install-lib))
 798
 799 ifndef objects
 800
 801 # Create the stamp$o files to keep the parent makefile happy.
 802 subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 803 $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o):
 804         $(make-target-directory)
 805         rm -f $@; > $@
 806 else
 807
 808 # Define explicit rules to update each $(objpfx)stamp.SUFFIX
 809 # timestamp file; these rules (one explicit rule is generated for each
 810 # object suffix) write a list of objects to update in the stamp file.
 811 # The parent will then actually add them all to the archive in the
 812 # archive rule, below.
 813 define o-iterator-doit
 814 $(objpfx)stamp$o: $(o-objects); $$(do-stamp)
 815 endef
 816 define do-stamp
 817 $(make-target-directory)
 818 echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T
 819 mv -f $@T $@
 820 endef
 821 object-suffixes-left := $(object-suffixes-for-libc)
 822 include $(o-iterator)
 823
 824 endif
 825
 826 # Now define explicit rules to build the library archives; these depend
 827 # on the stamp files built above.
 828 define o-iterator-doit
 829 $(common-objpfx)$(patsubst %,$(libtype$o),c): \
 830                 $(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib)
 831 endef
 832 define do-makelib
 833 cd $(common-objdir) && \
 834 $(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)`
 835 endef
 836 subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%)
 837 subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
 838 ifndef subdir
 839 $(subdirs-stamps): subdir_lib;
 840 endif
 841 object-suffixes-left = $(object-suffixes-for-libc)
 842 include $(o-iterator)
 843
 844
 845 # This makes all the object files.
 846 .PHONY: objects objs libobjs extra-objs
 847 objects objs: libobjs extra-objs
 848 libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 849 extra-objs: $(addprefix $(objpfx),$(extra-objs))
 850
 851 # Canned sequence for building an extra library archive.
 852 define build-extra-lib
 853 $(patsubst %/,cd % &&,$(objpfx)) \
 854 $(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \
 855       $(patsubst $(objpfx)%,%,$^)
 856 endef
 857 \f
 858 # Installation.
 859
 860 .PHONY: force-install
 861 force-install:
 862
 863 # $(install-lib) are installed from the object directory into $(libdir);
 864 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
 865 # unless they also appear in $(non-lib.a).  $(install-data) are installed as
 866 # they are into $(datadir).  $(headers) are installed as they are in
 867 # $(includedir).  $(install-bin), $(install-bin-script) and $(install-sbin)
 868 # are installed from the object directory into $(bindir), $(bindir) and
 869 # $(sbindir), respectively.  $(install-others) and $(install-others-programs)
 870 # are absolute path names of files to install; rules to install them are
 871 # defined elsewhere.
 872
 873 # The simple library name to install libc.a under.
 874 # This could be defined by a sysdep Makefile.
 875 ifndef libc-name
 876 libc-name := c
 877 endif
 878
 879 define do-install
 880 $(make-target-directory)
 881 $(INSTALL_DATA) $< $@
 882 endef
 883
 884 # Make the target directory if it doesn't exist, using the `mkinstalldirs'
 885 # script that does `mkdir -p' even if `mkdir' doesn't support that flag.
 886 define make-target-directory
 887 $(addprefix $(..)./scripts/mkinstalldirs ,\
 888             $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
 889 endef
 890
 891 # Any directory (parent or subdir) should install libc.a; this way
 892 # "make install" in a subdir is guaranteed to install everything it changes.
 893 installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
 894                              $(inst_libdir)/$(patsubst %,$(libtype$o),\
 895                                                      $(libprefix)$(libc-name)))
 896
 897 .PHONY: check-install-supported
 898 check-install-supported:
 899
 900 # Check to see if the prefix or exec_prefix GNU standard variable
 901 # has been overridden on the command line and, if so, fail with
 902 # an error message since doing so is not supported (set DESTDIR
 903 # instead).
 904 ifeq ($(origin prefix),command line)
 905 check-install-supported:
 906         $(error Overriding prefix is not supported. Set DESTDIR instead.)
 907 endif
 908
 909 ifeq ($(origin exec_prefix),command line)
 910 check-install-supported:
 911         $(error Overriding exec_prefix is not supported. Set DESTDIR instead.)
 912 endif
 913
 914 install: check-install-supported
 915
 916 install: $(installed-libcs)
 917 $(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
 918         $(make-target-directory)
 919         $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
 920
 921 define do-install-program
 922 $(make-target-directory)
 923 $(INSTALL_PROGRAM) $< $@.new
 924 mv -f $@.new $@
 925 endef
 926
 927 define do-install-script
 928 $(make-target-directory)
 929 $(INSTALL_SCRIPT) $< $@.new
 930 mv -f $@.new $@
 931 endef
 932
 933 install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
 934 install-lib := $(filter-out %.so %_pic.a,$(install-lib))
 935
 936 ifeq (yes,$(build-shared))
 937 # Find which .so's have a version number in their soname.
 938 versioned := $(strip $(foreach so,$(install-lib.so),\
 939                                $(patsubst %,$(so),$($(so)-version))))
 940
 941 install-lib.so-versioned := $(filter $(versioned), $(install-lib.so))
 942 install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so))
 943
 944 # For libraries whose soname have version numbers, we install two files:
 945 #       $(inst_libdir)/libfoo.so        -- for linking, symlink or ld script
 946 #       $(inst_slibdir)/libfoo.so.NN    -- for loading by SONAME
 947 install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \
 948                       $(foreach L,$(install-lib.so-versioned),\
 949                                 $(inst_libdir)/$L \
 950                                 $(inst_slibdir)/$L$($L-version))
 951
 952 # Install all the unversioned shared libraries.
 953 $(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \
 954     $(objpfx)%.so $(+force)
 955         $(do-install-program)
 956
 957 ifneq ($(findstring -s,$(LN_S)),)
 958 define make-link
 959 rm -f $@.new
 960 $(SHELL) $(..)scripts/rellns-sh $< $@.new
 961 mv -f $@.new $@
 962 endef
 963 define make-link-multidir
 964 $(patsubst %/,cd %,$(objpfx)); \
 965   $(addprefix $(abspath $(..)scripts/mkinstalldirs) ,$(dir $(multidir))); \
 966   $(LN_S) . $(multidir) 2> /dev/null; \
 967   test -L $(multidir)
 968 endef
 969 else
 970 # If we have no symbolic links don't bother with rellns-sh.
 971 define make-link
 972 rm -f $@.new
 973 $(LN_S) $< $@.new
 974 mv -f $@.new $@
 975 endef
 976 define make-link-multidir
 977 $(make-target-directory)
 978 ln -f $(objpfx)/$(@F) $@
 979 endef
 980 endif
 981
 982 ifdef libc.so-version
 983 $(inst_slibdir)/libc.so$(libc.so-version): $(common-objpfx)libc.so $(+force)
 984         $(do-install-program)
 985
 986 install: $(inst_slibdir)/libc.so$(libc.so-version)
 987
 988 # This fragment of linker script gives the OUTPUT_FORMAT statement
 989 # for the configuration we are building.  We put this statement into
 990 # the linker scripts we install for -lc et al so that they will not be
 991 # used by a link for a different format on a multi-architecture system.
 992 $(common-objpfx)format.lds: $(common-objpfx)config.make \
 993                             $(common-objpfx)config.h $(..)Makerules
 994         $(LINK.o) -shared -nostdlib -nostartfiles \
 995                   -x assembler /dev/null -o $@.so
 996         $(OBJDUMP) -f $@.so | sed -n 's/.*file format \(.*\)/OUTPUT_FORMAT(\1)/;T;p' > $@
 997         rm -f $@.so
 998 common-generated += format.lds
 999
1000 ifndef subdir
1001 # What we install as libc.so for programs to link against is in fact a
1002 # link script.  It contains references for the various libraries we need.
1003 # The libc.so object is not complete since some functions are only defined
1004 # in libc_nonshared.a.
1005 # We need to use absolute paths since otherwise local copies (if they exist)
1006 # of the files are taken by the linker.
1007 install: $(inst_libdir)/libc.so
1008 $(inst_libdir)/libc.so: $(common-objpfx)format.lds \
1009                         $(common-objpfx)libc.so$(libc.so-version) \
1010                         $(inst_libdir)/$(patsubst %,$(libtype.oS),\
1011                                                   $(libprefix)$(libc-name)) \
1012                         $(+force)
1013         (echo '/* GNU ld script';\
1014          echo '   Use the shared library, but some functions are only in';\
1015          echo '   the static library, so try that secondarily.  */';\
1016          cat $<; \
1017          echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \
1018               '$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\
1019               ' AS_NEEDED (' $(rtlddir)/$(rtld-installed-name) ') )' \
1020         ) > $@.new
1021         mv -f $@.new $@
1022
1023 endif
1024
1025 else
1026 install: $(inst_slibdir)/libc.so
1027 $(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force)
1028         $(do-install-program)
1029 endif
1030
1031 ifneq (,$(versioned))
1032 # Produce three sets of rules as above for all the smaller versioned libraries.
1033
1034 define o-iterator-doit
1035 $(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link)
1036 endef
1037 object-suffixes-left := $(filter-out $(install-lib-ldscripts),$(versioned))
1038 ifneq (,$(object-suffixes-left))
1039 include $(o-iterator)
1040 endif
1041
1042 # Make symlinks in the build directory, because the versioned names might
1043 # be referenced by a DT_NEEDED in another library.
1044 define o-iterator-doit
1045 $(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
1046 endef
1047 object-suffixes-left := $(versioned)
1048 include $(o-iterator)
1049
1050 generated += $(foreach o,$(versioned),$o$($o-version))
1051
1052 define o-iterator-doit
1053 $(inst_slibdir)/$o$($o-version): $(objpfx)$o $(+force);
1054         $$(do-install-program)
1055 endef
1056 object-suffixes-left := $(versioned)
1057 include $(o-iterator)
1058 endif # ifneq (,$(versioned))
1059
1060 define do-install-so
1061 $(do-install-program)
1062 $(patsubst %,$(LN_S) -f $(@F) \
1063                         $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
1064            $(filter-out %.so,$@))
1065 endef
1066
1067 so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
1068 $(foreach v,$(so-versions),\
1069           $(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \
1070                                                $(+force)
1071         $(do-install-so)
1072 $(foreach v,$(so-versions),\
1073           $(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force)
1074         $(do-install-so)
1075 endif
1076
1077 ifdef install-bin
1078 $(addprefix $(inst_bindir)/,$(install-bin)): \
1079     $(inst_bindir)/%: $(objpfx)% $(+force)
1080         $(do-install-program)
1081 endif
1082 ifdef install-bin-script
1083 $(addprefix $(inst_bindir)/,$(install-bin-script)): \
1084     $(inst_bindir)/%: $(objpfx)% $(+force)
1085         $(do-install-script)
1086 endif
1087 ifdef install-rootsbin
1088 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \
1089    $(inst_rootsbindir)/%: $(objpfx)% $(+force)
1090         $(do-install-program)
1091 endif
1092 ifdef install-sbin
1093 $(addprefix $(inst_sbindir)/,$(install-sbin)): \
1094     $(inst_sbindir)/%: $(objpfx)% $(+force)
1095         $(do-install-program)
1096 endif
1097 ifdef install-lib
1098 install-lib.a := $(filter lib%.a,$(install-lib))
1099 install-lib.a := $(filter-out $(install-lib-ldscripts),$(install-lib.a))
1100 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
1101 ifdef install-lib-non.a
1102 $(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
1103   $(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force)
1104         $(do-install)
1105 endif
1106 ifdef install-lib.a
1107 $(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \
1108   $(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force)
1109         $(do-install)
1110 endif
1111 endif
1112 ifdef install-data
1113 $(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force)
1114         $(do-install)
1115 endif
1116 headers := $(strip $(headers))
1117 ifdef headers
1118 # This implicit rule installs headers from the source directory.
1119 # It may be ignored in preference to rules from sysd-rules to find
1120 # headers in the sysdeps tree.
1121 $(inst_includedir)/%.h: $(objpfx)%.h $(+force)
1122         $(do-install)
1123 $(inst_includedir)/%.h: $(common-objpfx)%.h $(+force)
1124         $(do-install)
1125 $(inst_includedir)/%.h: %.h $(+force)
1126         $(do-install)
1127 headers-nonh := $(filter-out %.h,$(headers))
1128 ifdef headers-nonh
1129 $(addprefix $(inst_includedir)/,$(headers-nonh)): $(inst_includedir)/%: \
1130                                                  % $(+force)
1131         $(do-install)
1132 endif   # headers-nonh
1133 endif   # headers
1134
1135 .PHONY: install-bin-nosubdir install-bin-script-nosubdir \
1136         install-rootsbin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
1137         install-data-nosubdir install-headers-nosubdir
1138 install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin))
1139 install-bin-script-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin-script))
1140 install-rootsbin-nosubdir: \
1141         $(addprefix $(inst_rootsbindir)/,$(install-rootsbin))
1142 install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin))
1143 install-lib-nosubdir: $(addprefix $(inst_libdir)/,\
1144                        $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
1145                        $(addprefix $(libprefix),$(install-lib-non.a)))
1146 install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data))
1147 install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers))
1148 install-others-nosubdir: $(install-others)
1149 install-others-programs-nosubdir: $(install-others-programs)
1150
1151 # We need all the `-nosubdir' targets so that `install' in the parent
1152 # doesn't depend on several things which each iterate over the subdirs.
1153 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
1154 # subroutine.  Then in the parent `install-FOO' also causes subdir makes.
1155 install-%:: install-%-nosubdir ;
1156
1157 .PHONY: install install-no-libc.a-nosubdir
1158 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir \
1159                             install-lib-nosubdir install-others-nosubdir
1160 ifeq ($(build-programs),yes)
1161 install-no-libc.a-nosubdir: install-bin-nosubdir install-bin-script-nosubdir \
1162                             install-rootsbin-nosubdir install-sbin-nosubdir \
1163                             install-others-programs-nosubdir
1164 endif
1165 install: install-no-libc.a-nosubdir
1166 \f
1167 # Command to compile $< using the native libraries.
1168 define native-compile
1169 $(make-target-directory)
1170 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
1171             $< $(OUTPUT_OPTION) $(BUILD_LDFLAGS)
1172 endef
1173
1174 # We always want to use configuration definitions.
1175 ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) -D_GNU_SOURCE \
1176                    -DIS_IN_build -include $(common-objpfx)config.h
1177
1178 # Support the GNU standard name for this target.
1179 .PHONY: check
1180 check: tests
1181 # Special target to run tests which cannot be run unconditionally.
1182 # Maintainers should use this target.
1183 .PHONY: xcheck
1184 xcheck: xtests
1185
1186 # Handle tests-time64 and xtests-time64 that should built with LFS
1187 # and 64-bit time support.
1188 include $(o-iterator)
1189 define o-iterator-doit
1190 $(foreach f,$(tests-time64) $(xtests-time64),\
1191             $(objpfx)$(f)$(o)): CFLAGS += -D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64
1192 endef
1193 object-suffixes-left := $(all-object-suffixes)
1194 include $(o-iterator)
1195
1196 ifeq ($(have-time64-compat),yes)
1197 tests += $(foreach t,$(tests-time64),$(t))
1198 xtests += $(foreach t,$(xtests-time64),$(t))
1199 endif
1200
1201 # The only difference between MODULE_NAME=testsuite and MODULE_NAME=nonlib is
1202 # that almost all internal declarations from config.h, libc-symbols.h, and
1203 # include/*.h are not available to 'testsuite' code, but are to 'nonlib' code.
1204 all-testsuite := $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) \
1205                  $(tests-container))
1206 ifneq (,$(all-testsuite))
1207 cpp-srcs-left = $(all-testsuite)
1208 lib := testsuite
1209 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
1210 endif
1211
1212 all-nonlib := $(strip $(others) $(others-extras))
1213 ifneq (,$(all-nonlib))
1214 cpp-srcs-left = $(all-nonlib)
1215 lib := nonlib
1216 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
1217 endif
1218
1219 # All internal tests use testsuite-internal module since for 64 bit time
1220 # support is set as default for MODULE_NAME=nonlib (which include some
1221 # installed programs).
1222 all-testsuite-internal := $(strip $(tests-internal) $(test-internal-extras))
1223 ifneq (,$(all-testsuite-internal))
1224 cpp-srcs-left = $(all-testsuite-internal)
1225 lib := testsuite-internal
1226 include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
1227 endif
1228
1229 ifeq ($(build-shared),yes)
1230 # Generate normalized lists of symbols, versions, and data sizes.
1231 # This is handy for checking against existing library binaries.
1232
1233 %.symlist: $(..)scripts/abilist.awk %.dynsym
1234         LC_ALL=C $(AWK) -f $^ > $@T
1235         mv -f $@T $@
1236
1237 %.dynsym: %.so
1238         LC_ALL=C $(OBJDUMP) --dynamic-syms $< > $@T
1239         mv -f $@T $@
1240
1241 vpath %.abilist $(+sysdep_dirs)
1242
1243 # The .PRECIOUS rule prevents the files built by an implicit rule whose
1244 # target pattern is %.symlist from being considered "intermediate files"
1245 # and automatically removed.  We only want these files to be removed by
1246 # 'make clean', which is handled by the 'generated' variable.
1247 .PRECIOUS: %.symlist
1248 generated += $(extra-libs:=.symlist)
1249
1250 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1251                           $(objpfx)%.symlist
1252         $(check-abi); \
1253         $(evaluate-test)
1254 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1255                           $(common-objpfx)%.symlist
1256         $(check-abi); \
1257         $(evaluate-test)
1258 define check-abi
1259         diff -p -U 0 $(filter %.abilist,$^) $(filter %.symlist,$^) > $@
1260 endef
1261
1262 update-abi-%: $(objpfx)%.symlist %.abilist
1263         $(update-abi)
1264 update-abi-%: $(common-objpfx)%.symlist %.abilist
1265         $(update-abi)
1266 define update-abi
1267 @if cmp -s $^ 2> /dev/null; \
1268  then \
1269       echo '+++ $(filter %.abilist,$^) is unchanged'; \
1270  else cp -f $^; \
1271       echo '*** Now check $(filter %.abilist,$^) changes for correctness ***'; \
1272  fi
1273 endef
1274
1275 # Patch all .abilist files for one DSO.  The find command locates abilist
1276 # files for all architectures.  The abilist files in /generic/ are
1277 # filtered out because these are expected to remain empty.
1278 define update-all-abi
1279 $(SHELL) $(..)scripts/update-abilist.sh $^ \
1280   $$(find $(..)sysdeps -name '$*.abilist' \! -path '*/generic/*')
1281 endef
1282 update-all-abi-%: %.abilist $(objpfx)%.symlist
1283         $(update-all-abi)
1284 update-all-abi-%: %.abilist $(common-objpfx)%.symlist
1285         $(update-all-abi)
1286
1287 .PHONY: update-abi update-all-abi check-abi
1288 update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned))
1289 update-all-abi: $(patsubst %.so,update-all-abi-%,$(install-lib.so-versioned))
1290 check-abi-list = $(patsubst %.so,$(objpfx)check-abi-%.out, \
1291                                  $(install-lib.so-versioned))
1292 check-abi: $(check-abi-list)
1293 ifdef subdir
1294 subdir_check-abi: check-abi
1295 subdir_update-abi: update-abi
1296 subdir_update-all-abi: update-all-abi
1297 else
1298 check-abi: subdir_check-abi
1299         if grep -q '^FAIL:' $(objpfx)*/check-abi*.test-result; then \
1300                 cat $(objpfx)*/check-abi*.out && exit 1; fi
1301 update-abi: subdir_update-abi
1302 update-all-abi: subdir_update-all-abi
1303 endif
1304
1305 ifeq ($(subdir),elf)
1306 check-abi: $(objpfx)check-abi-libc.out
1307 tests-special += $(objpfx)check-abi-libc.out
1308 update-abi: update-abi-libc
1309 update-all-abi: update-all-abi-libc
1310 common-generated += libc.symlist
1311 endif
1312
1313 ifeq ($(build-shared),yes)
1314 ifdef subdir
1315 tests-special += $(check-abi-list)
1316 endif
1317 endif
1318
1319 endif
1320 \f
1321 FORCE:
1322
1323 .PHONY: echo-headers
1324 echo-headers:
1325         @echo $(headers)
1326
1327 %.bz2: %; bzip2 -9vk $<
1328 %.gz: %; gzip -9vnc $< > $@.new && mv -f $@.new $@
1329 %.xz: %; xz -9evk $<
1330 \f
1331 # Common cleaning targets.
1332
1333 .PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean
1334 clean: common-clean
1335 mostlyclean: common-mostlyclean
1336
1337 # Remove test artifacts from a given directory
1338 do-tests-clean:
1339         -find $(objpfx) -name '*.out' -delete
1340         -find $(objpfx) -name '*.test-result' -delete
1341
1342 # Remove the object files.
1343 common-mostlyclean: do-tests-clean
1344         -rm -f $(addprefix $(objpfx),$(tests) $(tests-internal) $(xtests) \
1345                                      $(test-srcs) \
1346                                      $(others) $(sysdep-others) stubs \
1347                                      $(addsuffix .o,$(tests) \
1348                                                     $(tests-internal) \
1349                                                     $(xtests) \
1350                                                     $(test-srcs) \
1351                                                     $(others) \
1352                                                     $(sysdep-others)))
1353         -rm -f $(addprefix $(objpfx),$(extra-objs) $(extra-test-objs) \
1354                                      $(install-lib) $(install-lib.so) \
1355                                      $(install-lib.so:%.so=%_pic.a))
1356         -rm -f core
1357         -rm -f $(objpfx)rtld-*.os
1358         $(rmobjs)
1359 define rmobjs
1360 $(foreach o,$(object-suffixes-for-libc),
1361 -rm -f $(objpfx)stamp$o $(o-objects))
1362 endef
1363
1364 # Also remove the dependencies and generated source files.
1365 common-clean: common-mostlyclean
1366         -rm -f $(addprefix $(objpfx),$(generated))
1367         -rm -f $(objpfx)*.d $(objpfx)*.dt
1368         -rm -fr $(addprefix $(objpfx),$(generated-dirs))
1369         -rm -f $(addprefix $(common-objpfx),$(common-generated))
1370         -rm -f $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
1371 \f
1372 # Produce a file `stubs' which contains `#define __stub_FUNCTION'
1373 # for each function which is a stub.
1374
1375 ifdef objpfx
1376 .PHONY: stubs # The parent Makefile calls this target.
1377 stubs: $(objpfx)stubs
1378 endif
1379 objs-for-stubs := $(foreach o,$(object-suffixes-for-libc),$(o-objects)) \
1380                   $(addprefix $(objpfx),$(extra-objs))
1381 $(objpfx)stubs: $(objs-for-stubs)
1382 ifneq (,$(strip $(objs-for-stubs)))
1383         (cd $(objpfx).; $(OBJDUMP) -h $(patsubst $(objpfx)%,%,$^)) | \
1384         $(AWK) '/\.gnu\.glibc-stub\./ { \
1385                   sub(/\.gnu\.glibc-stub\./, "", $$2); \
1386                   stubs[$$2] = 1; } \
1387                 END { for (s in stubs) print "#define __stub_" s }' > $@T
1388         mv -f $@T $@
1389 else
1390         > $@
1391 endif
1392 \f
1393 ifneq (,$(strip $(gpl2lgpl)))
1394 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
1395 # Snarf from the master source and frob the copying notice.
1396 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
1397         sed -f $^ > $@-tmp
1398 # So I don't edit them by mistake.
1399         chmod a-w $@-tmp
1400         mv -f $@-tmp $@
1401 endif
1402 endif
1403
1404 # Local Variables:
1405 # mode: makefile
1406 # End: