Makerules

   1 # Copyright (C) 1991-2017 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) -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 # $(build-shared) = yes
 110
 111 ifndef avoid-generated
 112 ifneq (,$(CXX))
 113 # If C++ headers <cstdlib> or <cmath> are used, GCC 6 will include
 114 # /usr/include/stdlib.h or /usr/include/math.h from "#include_next"
 115 # (instead of stdlib/stdlib.h or math/math.h in the glibc source
 116 # directory), and this turns up as a make dependency.  An implicit
 117 # rule will kick in and make will try to install stdlib/stdlib.h or
 118 # math/math.h as /usr/include/stdlib.h or /usr/include/math.h because
 119 # the target is out of date.  We make a copy of <cstdlib> and <cmath>
 120 # in the glibc build directory so that stdlib/stdlib.h and math/math.h
 121 # will be used instead of /usr/include/stdlib.h and /usr/include/math.h.
 122 before-compile := $(common-objpfx)cstdlib $(common-objpfx)cmath \
 123                   $(before-compile)
 124 $(common-objpfx)cstdlib: $(c++-cstdlib-header)
 125         $(INSTALL_DATA) $< $@T
 126         $(move-if-change) $@T $@
 127 $(common-objpfx)cmath: $(c++-cmath-header)
 128         $(INSTALL_DATA) $< $@T
 129         $(move-if-change) $@T $@
 130 endif
 131
 132 before-compile := $(common-objpfx)libc-abis.h $(before-compile)
 133 $(common-objpfx)libc-abis.h: $(common-objpfx)libc-abis.stamp; @:
 134 $(common-objpfx)libc-abis.stamp: $(..)scripts/gen-libc-abis \
 135                              $(firstword $(wildcard $(sysdirs:=/libc-abis)) \
 136                                          $(..)libc-abis) \
 137                              $(..)Makerules
 138         $(SHELL) $< \
 139                  $(base-machine)-$(config-vendor)-$(config-os) \
 140                  < $(word 2,$^) > $(@:.stamp=.h)T
 141         $(move-if-change) $(@:.stamp=.h)T $(@:.stamp=.h)
 142         touch $@
 143 common-generated += $(common-objpfx)libc-abis.h
 144 endif # avoid-generated
 145
 146 ifeq (yes,$(build-shared))
 147 $(common-objpfx)runtime-linker.h: $(common-objpfx)runtime-linker.stamp; @:
 148 $(common-objpfx)runtime-linker.stamp: $(common-objpfx)config.make
 149         $(make-target-directory)
 150         echo '#define RUNTIME_LINKER "$(rtlddir)/$(rtld-installed-name)"' \
 151                 > ${@:stamp=T}
 152         $(move-if-change) ${@:stamp=T} ${@:stamp=h}
 153         touch $@
 154 endif
 155
 156 # Make sure the subdirectory for object files gets created.
 157 ifdef objpfx
 158 ifeq (,$(wildcard $(objpfx).))
 159 before-compile += $(objpfx).
 160 $(objpfx).:
 161         $(make-target-directory)
 162 endif
 163 endif
 164
 165 # Remove existing files from `before-compile'.  Things are added there when
 166 # they must exist for dependency generation to work right, but once they
 167 # exist there is no further need for every single file to depend on them,
 168 # and those gratuitous dependencies result in many gratuitous
 169 # recompilations.
 170 before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
 171
 172 # Don't let any before-compile file be an intermediate and get removed.
 173 ifdef before-compile
 174 $(before-compile):
 175 endif
 176
 177 # We don't want $(common-objpfx) files to depend on miscellaneous stuff
 178 # in subdirs.
 179 ifdef subdir
 180 common-before-compile := $(filter-out $(objpfx)%,$(before-compile))
 181 else
 182 common-before-compile = $(before-compile)
 183 endif
 184
 185 ifndef subdir
 186 # If a makefile needs to do something conditional on something that
 187 # can only be figured out from headers, write a FOO.make.c input
 188 # file that uses cpp contructs and contains @@@ LINE @@@ for each LINE
 189 # to emit in the generated makefile, and use -include $(common-objpfx)FOO.make.
 190 #
 191 # We only generate these in the top-level makefile, to avoid any weirdness
 192 # from subdir-specific makefile tweaks creeping in on an update.
 193 $(common-objpfx)%.make: $(..)%.make.c $(..)Makerules $(common-before-compile)
 194         rm -f $@T $@.dT
 195         (echo '# Generated from $*.make.c by Makerules.'; \
 196          $(CC) $(CFLAGS) $(CPPFLAGS) -E -DASSEMBLER $< \
 197                -MD -MP -MT '$$(common-objpfx)$*.make' -MF $@.dT \
 198          | sed -n '/@@@/{s/@@@[  ]*\(.*\)@@@/\1/;s/[     ]*$$//p;}'; \
 199          echo 'common-generated += $(@F)'; \
 200          sed $(sed-remove-objpfx) $(sed-remove-dotdot) $@.dT; \
 201          rm -f $@.dT) > $@T
 202         mv -f $@T $@
 203 endif
 204
 205 ifdef subdir
 206 sed-remove-dotdot := -e 's@  *\.\.\/\([^        \]*\)@ $$(..)\1@g' \
 207                      -e 's@^\.\.\/\([^  \]*\)@$$(..)\1@g'
 208 else
 209 sed-remove-dotdot := -e 's@  *\([^      \/$$][^         \]*\)@ $$(..)\1@g' \
 210                      -e 's@^\([^        \/$$][^         \]*\)@$$(..)\1@g'
 211 endif
 212
 213 ifdef gen-py-const-headers
 214 # We'll use a static pattern rule to match .pysym files with their
 215 # corresponding generated .py files.
 216 # The generated .py files go in the submodule's dir in the glibc build dir.
 217 py-const-files := $(patsubst %.pysym,%.py,$(gen-py-const-headers))
 218 py-const-dir := $(objpfx)
 219 py-const := $(addprefix $(py-const-dir),$(py-const-files))
 220 py-const-script := $(..)scripts/gen-py-const.awk
 221
 222 # This is a hack we use to generate .py files with constants for Python
 223 # pretty printers.  It works the same way as gen-as-const.
 224 # See scripts/gen-py-const.awk for details on how the awk | gcc mechanism
 225 # works.
 226 #
 227 # $@.tmp and $@.tmp2 are temporary files we use to store the partial contents
 228 # of the target file.  We do this instead of just writing on $@ because, if the
 229 # build process terminates prematurely, re-running Make wouldn't run this rule
 230 # since Make would see that the target file already exists (despite it being
 231 # incomplete).
 232 #
 233 # The sed line replaces "@name@SOME_NAME@value@SOME_VALUE@" strings from the
 234 # output of 'gcc -S' with "SOME_NAME = SOME_VALUE" strings.
 235 # The '-n' option, combined with the '/p' command, makes sed output only the
 236 # modified lines instead of the whole input file.  The output is redirected
 237 # to a .py file; we'll import it in the pretty printers file to read
 238 # the constants generated by gen-py-const.awk.
 239 # The regex has two capturing groups, for SOME_NAME and SOME_VALUE
 240 # respectively.  Notice SOME_VALUE may be prepended by a special character,
 241 # depending on the assembly syntax (e.g. immediates are prefixed by a '$'
 242 # in AT&T x86, and by a '#' in ARM).  We discard it using a complemented set
 243 # before the second capturing group.
 244 $(py-const): $(py-const-dir)%.py: %.pysym $(py-const-script) \
 245              $(common-before-compile)
 246         $(make-target-directory)
 247         $(AWK) -f $(py-const-script) $< \
 248                | $(CC) -S -o $@.tmp $(CFLAGS) $(CPPFLAGS) -x c -
 249         echo '# GENERATED FILE\n' > $@.tmp2
 250         echo '# Constant definitions for pretty printers.' >> $@.tmp2
 251         echo '# See gen-py-const.awk for details.\n' >> $@.tmp2
 252         sed -n -r 's/^.*@name@([^@]+)@value@[^[:xdigit:]Xx-]*([[:xdigit:]Xx-]+)@.*/\1 = \2/p' \
 253             $@.tmp >> $@.tmp2
 254         mv -f $@.tmp2 $@
 255         rm -f $@.tmp
 256
 257 generated += $(py-const)
 258 endif  # gen-py-const-headers
 259
 260 ifdef gen-as-const-headers
 261 # Generating headers for assembly constants.
 262 # We need this defined early to get into before-compile before
 263 # it's used in sysd-rules, below.
 264 $(common-objpfx)%.h $(common-objpfx)%.h.d: $(..)scripts/gen-as-const.awk \
 265                                            %.sym $(common-before-compile)
 266         $(AWK) -f $< $(filter %.sym,$^) \
 267         | $(CC) -S -o $(@:.h.d=.h)T3 $(CFLAGS) $(CPPFLAGS) -x c - \
 268                 -MD -MP -MF $(@:.h=.h.d)T -MT '$(@:.h=.h.d) $(@:.h.d=.h)'
 269         sed -n 's/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*$$/#define \1 \2/p' \
 270                 $(@:.h.d=.h)T3 > $(@:.h.d=.h)T
 271         rm -f $(@:.h.d=.h)T3
 272         sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
 273             $(@:.h=.h.d)T > $(@:.h=.h.d)T2
 274         rm -f $(@:.h=.h.d)T
 275         mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d)
 276         mv -f $(@:.h.d=.h)T $(@:.h.d=.h)
 277 vpath %.sym $(sysdirs)
 278 before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 279
 280 tests += $(gen-as-const-headers:%.sym=test-as-const-%)
 281 generated += $(gen-as-const-headers:%.sym=test-as-const-%.c)
 282 $(objpfx)test-as-const-%.c: $(..)scripts/gen-as-const.awk $(..)Makerules \
 283                             %.sym $(common-objpfx)%.h
 284         ($(AWK) '{ sub(/^/, "asconst_", $$2); print; }' $(filter %.h,$^); \
 285          $(AWK) -v test=1 -f $< $(filter %.sym,$^); \
 286          echo '#include "$(..)test-skeleton.c"') > $@T
 287         mv -f $@T $@
 288 endif
 289 \f
 290 ifeq (yes,$(build-shared))
 291 # Generate the header containing the names of all shared libraries.
 292 # We use a stamp file to avoid unnecessary recompilations.
 293 before-compile += $(common-objpfx)gnu/lib-names.h
 294 ifeq ($(soversions.mk-done),t)
 295 ifndef abi-variants
 296 lib-names-h-abi = gnu/lib-names.h
 297 lib-names-stmp-abi = gnu/lib-names.stmp
 298 else
 299 lib-names-h-abi = gnu/lib-names-$(default-abi).h
 300 lib-names-stmp-abi = gnu/lib-names-$(default-abi).stmp
 301 before-compile += $(common-objpfx)$(lib-names-h-abi)
 302 common-generated += gnu/lib-names.h
 303 install-others-nosubdir: $(inst_includedir)/$(lib-names-h-abi)
 304 $(common-objpfx)gnu/lib-names.h:
 305         $(make-target-directory)
 306         { \
 307          echo '/* This file is automatically generated.';\
 308          echo '   It defines macros to allow user program to find the shared'; \
 309          echo '   library files which come as part of GNU libc.  */'; \
 310          echo '#ifndef __GNU_LIB_NAMES_H'; \
 311          echo '#define __GNU_LIB_NAMES_H        1'; \
 312          echo ''; \
 313          $(if $(abi-includes), \
 314           $(foreach h,$(abi-includes), echo '#include <$(h)>';) \
 315           echo '';) \
 316          $(foreach v,$(abi-variants),\
 317          $(if $(abi-$(v)-condition),\
 318          echo '#if $(abi-$(v)-condition)'; \
 319          echo '# include <gnu/lib-names-$(v).h>'); \
 320          $(if $(abi-$(v)-condition),echo '#endif';)) \
 321          echo ''; \
 322          echo '#endif   /* gnu/lib-names.h */'; \
 323         } >  $@
 324 endif
 325 $(common-objpfx)$(lib-names-h-abi): $(common-objpfx)$(lib-names-stmp-abi); @:
 326 $(common-objpfx)$(lib-names-stmp-abi): $(..)scripts/lib-names.awk \
 327                                        $(common-objpfx)soversions.i
 328         $(make-target-directory)
 329         { \
 330          $(if $(abi-variants), \
 331          echo '/* This file is automatically generated.  */';\
 332          echo '#ifndef __GNU_LIB_NAMES_H'; \
 333          echo '# error "Never use <$(lib-names-h-abi)> directly; include <gnu/lib-names.h> instead."'; \
 334          echo '#endif';, \
 335          echo '/* This file is automatically generated.';\
 336          echo '   It defines macros to allow user program to find the shared'; \
 337          echo '   library files which come as part of GNU libc.  */'; \
 338          echo '#ifndef __GNU_LIB_NAMES_H'; \
 339          echo '#define __GNU_LIB_NAMES_H        1';) \
 340          echo ''; \
 341          ($(foreach s,$(all-sonames), echo $(s);)) \
 342          | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort; \
 343          $(if $(abi-variants),, \
 344          echo ''; \
 345          echo '#endif   /* gnu/lib-names.h */';) \
 346         } >  ${@:stmp=T}
 347         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
 348         touch $@
 349 endif
 350 common-generated += $(lib-names-h-abi) $(lib-names-stmp-abi)
 351 endif
 352 \f
 353 ###############################################################################
 354 # NOTE!  Everything adding to before-compile needs to come before this point! #
 355 ###############################################################################
 356
 357 # Generate an ordered list of implicit rules which find the source files in
 358 # each sysdep directory.  The old method was to use vpath to search all the
 359 # sysdep directories.  However, that had the problem that a .S file in a
 360 # later directory would be chosen over a .c file in an earlier directory,
 361 # which does not preserve the desired sysdeps ordering behavior.
 362
 363 # System-dependent makefiles can put in `inhibit-sysdep-asm' regexps
 364 # matching sysdep directories whose assembly source files should be
 365 # suppressed.
 366
 367 -include $(common-objpfx)sysd-rules
 368 ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
 369 # The value of $(+sysdep_dirs) the sysd-rules was computed for
 370 # differs from the one we are using now.  So force a rebuild of sysd-rules.
 371 sysd-rules-force = FORCE
 372 FORCE:
 373 endif
 374 $(common-objpfx)sysd-rules: $(..)scripts/sysd-rules.awk \
 375                             $(common-objpfx)config.make $(..)Makerules \
 376                             $(sysdep-makefiles) $(sysdep-makeconfigs) \
 377                             $(sysd-rules-force)
 378         -@rm -f $@T
 379         LC_ALL=C $(AWK) -f $< > $@T \
 380                         -v all_object_suffixes='$(all-object-suffixes)' \
 381                         -v inhibit_sysdep_asm='$(inhibit-sysdep-asm)' \
 382                         -v sysd_rules_patterns='$(sysd-rules-patterns)' \
 383                         -v config_sysdirs='$(config-sysdirs)'
 384         mv -f $@T $@
 385
 386 ifndef sysd-rules-done
 387 # Don't do deps until this exists, because it provides rules to make the deps.
 388 no_deps=t
 389 endif
 390
 391 define o-iterator-doit
 392 $(objpfx)%$o: %.S $(before-compile); $$(compile-command.S)
 393 endef
 394 object-suffixes-left := $(all-object-suffixes)
 395 include $(o-iterator)
 396
 397 define o-iterator-doit
 398 $(objpfx)%$o: %.c $(before-compile); $$(compile-command.c)
 399 endef
 400 object-suffixes-left := $(all-object-suffixes)
 401 include $(o-iterator)
 402
 403 define o-iterator-doit
 404 $(objpfx)%$o: %.cc $(before-compile); $$(compile-command.cc)
 405 endef
 406 object-suffixes-left := $(all-object-suffixes)
 407 include $(o-iterator)
 408
 409 # Omit the objpfx rules when building in the source tree, because
 410 # objpfx is empty and so these rules just override the ones above.
 411 ifdef objpfx
 412 # Define first rules to find the source files in $(objpfx).
 413 # Generated source files will end up there.
 414 define o-iterator-doit
 415 $(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S)
 416 endef
 417 object-suffixes-left := $(all-object-suffixes)
 418 include $(o-iterator)
 419
 420 define o-iterator-doit
 421 $(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
 422 endef
 423 object-suffixes-left := $(all-object-suffixes)
 424 include $(o-iterator)
 425 endif
 426
 427 # Generate version maps, but wait until sysdep-subdirs is known
 428 ifeq ($(sysd-sorted-done),t)
 429 ifeq ($(build-shared),yes)
 430 -include $(common-objpfx)sysd-versions
 431 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
 432 common-generated += $(version-maps)
 433 postclean-generated += sysd-versions Versions.all abi-versions.h \
 434                        Versions.def Versions.v.i Versions.v
 435
 436 ifndef avoid-generated
 437 ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
 438 sysd-versions-force = FORCE
 439 FORCE:
 440 endif
 441
 442 $(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
 443                               $(common-objpfx)Versions.v
 444         LC_ALL=C $(AWK) -f $^ > $@T
 445         mv -f $@T $@
 446
 447 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
 448                               $(common-objpfx)soversions.i \
 449                               $(common-objpfx)Versions.def
 450         { while read which lib version setname; do \
 451             test x"$$which" = xDEFAULT || continue; \
 452             test -z "$$setname" || echo "$$lib : $$setname"; \
 453           done < $(word 2,$^); \
 454           cat $(word 3,$^); \
 455         } | LC_ALL=C $(AWK) -f $< > $@T
 456         mv -f $@T $@
 457 # See %.v/%.v.i implicit rules in Makeconfig.
 458 $(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
 459                               $(wildcard $(sysdirs:%=%/Versions)) \
 460                               $(sysd-versions-force)
 461 $(common-objpfx)sysd-versions: $(common-objpfx)Versions.all \
 462                                $(common-objpfx)Versions.v \
 463                                $(..)scripts/versions.awk
 464         ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
 465           cat $(word 2,$^) \
 466           | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
 467                             -v move_if_change='$(move-if-change)' \
 468                             -f $(word 3,$^); \
 469         ) > $@T
 470         mv -f $@T $@
 471 endif # avoid-generated
 472 endif # $(build-shared) = yes
 473 endif # sysd-sorted-done
 474
 475 # Generate .dT files as we compile.
 476 compile-mkdep-flags = -MD -MP -MF $@.dt -MT $@
 477 compile-command.S = $(compile.S) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 478 compile-command.c = $(compile.c) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 479 compile-command.cc = $(compile.cc) $(OUTPUT_OPTION) $(compile-mkdep-flags)
 480
 481 # Like compile-mkdep-flags, but for use with $(BUILD_CC).  We don't want to
 482 # track system includes here, they may spuriously trigger an install rule,
 483 # and would cause the check-local-headers test to fail.
 484 native-compile-mkdep-flags = -MMD -MP -MF $@.dt -MT $@
 485
 486 # GCC can grok options after the file name, and it looks nicer that way.
 487 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
 488 compile.cc = $(CXX) $< -c $(CXXFLAGS) $(CPPFLAGS)
 489 compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \
 490                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 491 COMPILE.c = $(CC) -c $(CFLAGS) $(CPPFLAGS)
 492 COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \
 493                   $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 494
 495 # We need this for the output to go in the right place.  It will default to
 496 # empty if make was configured to work with a cc that can't grok -c and -o
 497 # together.  You can't compile the C library with such a compiler.
 498 OUTPUT_OPTION = -o $@
 499
 500 # This is the end of the pipeline for compiling generated C code.
 501 compile-stdin.c = $(COMPILE.c) -o $@ -x c - $(compile-mkdep-flags)
 502
 503 # We need the $(CFLAGS) to be in there to have the right predefines during
 504 # the dependency run for C sources.  But having it for assembly sources can
 505 # get the wrong predefines.
 506 S-CPPFLAGS = -DASSEMBLER $(asm-CPPFLAGS)
 507
 508 define +make-deps
 509 $(make-target-directory)
 510 $(+mkdep) $< $(if $(filter %.c,$<),$(CFLAGS)) \
 511              $(CPPFLAGS) $($(patsubst .%,%,$(suffix $(<F)))-CPPFLAGS) | sed -e\
 512 's,$(subst .,\.,$(@F:.d=.o)),$(foreach o,$(all-object-suffixes),$(@:.d=$o)) $@,' \
 513 $(sed-remove-objpfx) $(sed-remove-dotdot) > $(@:.d=.T)
 514 mv -f $(@:.d=.T) $@ $(generate-md5)
 515 endef
 516
 517 ifneq (,$(objpfx))
 518 # Continuation lines here are dangerous because they introduce spaces!
 519 define sed-remove-objpfx
 520 -e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
 521 -e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g'
 522 endef
 523 endif
 524 \f
 525 # Modify the list of routines we build for different targets
 526
 527 ifeq (yes,$(build-shared))
 528 ifndef libc.so-version
 529 # Undefine this because it can't work when we libc.so is unversioned.
 530 static-only-routines =
 531 endif
 532 endif
 533
 534 elide-routines.oS += $(filter-out $(static-only-routines),\
 535                                   $(routines) $(aux) $(sysdep_routines))
 536 elide-routines.os += $(static-only-routines)
 537
 538 # If we have versioned code we don't need the old versions in any of the
 539 # static libraries.
 540 elide-routines.o  += $(shared-only-routines)
 541 elide-routines.op += $(shared-only-routines)
 542 \f
 543 # Shared library building.
 544
 545 ifeq (yes,$(build-shared))
 546
 547 # Reference map file only when shared libraries are built and a map file name
 548 # is given.
 549 ifeq ($(build-shared),yes)
 550 map-file = $(firstword $($(@F:.so=-map)) \
 551                        $(addprefix $(common-objpfx), \
 552                                    $(filter $(@F:.so=.map),$(version-maps))))
 553 load-map-file = $(map-file:%=-Wl,--version-script=%)
 554 endif
 555
 556 # Compiler arguments to use to link a shared object with libc and
 557 # ld.so.  This is intended to be as similar as possible to a default
 558 # link with an installed libc.
 559 link-libc-args = -Wl,--start-group \
 560                  $(libc-for-link) \
 561                  $(common-objpfx)libc_nonshared.a \
 562                  $(as-needed) $(elf-objpfx)ld.so $(no-as-needed) \
 563                  -Wl,--end-group
 564
 565 # The corresponding shared libc to use.  This may be modified for a
 566 # particular target.
 567 libc-for-link = $(common-objpfx)libc.so
 568
 569 # The corresponding dependencies.  As these are used in dependencies,
 570 # not just commands, they cannot use target-specific variables so need
 571 # to name both possible libc.so objects.
 572 link-libc-deps = $(common-objpfx)libc.so $(common-objpfx)linkobj/libc.so \
 573                  $(common-objpfx)libc_nonshared.a $(elf-objpfx)ld.so
 574
 575 # Pattern rule to build a shared object from an archive of PIC objects.
 576 # This must come after the installation rules so Make doesn't try to
 577 # build shared libraries in place from the installed *_pic.a files.
 578 # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
 579 # on other shared objects.  The linking with libc and ld.so is intended
 580 # to be as similar as possible to a default link with an installed libc.
 581 lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(link-libc-deps)
 582         $(build-shlib) $(link-libc-args)
 583         $(call after-link,$@)
 584
 585 define build-shlib-helper
 586 $(LINK.o) -shared -static-libgcc -Wl,-O1 $(sysdep-LDFLAGS) \
 587           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) $(rtld-LDFLAGS) \
 588           $(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \
 589           $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
 590           -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
 591           $(LDFLAGS.so) $(LDFLAGS-lib.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
 592           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 593 endef
 594
 595 ifeq (yes,$(use-default-link))
 596 # If the linker is good enough, we can let it use its default linker script.
 597 shlib-lds =
 598 shlib-lds-flags =
 599 else
 600 # binutils only position loadable notes into the first page for binaries,
 601 # not for shared objects
 602 $(common-objpfx)shlib.lds: $(common-objpfx)config.make $(..)Makerules
 603         $(LINK.o) -shared -Wl,-O1 \
 604                   -nostdlib -nostartfiles \
 605                   $(sysdep-LDFLAGS) $(rtld-LDFLAGS) $(LDFLAGS.so) \
 606                   -Wl,--verbose 2>&1 | \
 607           sed > $@T \
 608               -e '/^=========/,/^=========/!d;/^=========/d' \
 609               $(if $(filter yes,$(have-hash-style)), \
 610                    -e 's/^.*\.gnu\.hash[        ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 611                    -e '/^[      ]*\.hash[       ]*:.*$$/{h;d;}' \
 612                    -e '/DATA_SEGMENT_ALIGN/{H;g}' \
 613                 , \
 614                    -e 's/^.*\.hash[     ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 615                ) \
 616               -e 's/^.*\*(\.dynbss).*$$/& \
 617                  PROVIDE(__start___libc_freeres_ptrs = .); \
 618                  *(__libc_freeres_ptrs) \
 619                  PROVIDE(__stop___libc_freeres_ptrs = .);/'\
 620               -e 's@^.*\*(\.jcr).*$$@& \
 621                  PROVIDE(__start___libc_subfreeres = .);\
 622                  __libc_subfreeres : { *(__libc_subfreeres) }\
 623                  PROVIDE(__stop___libc_subfreeres = .);\
 624                  PROVIDE(__start___libc_atexit = .);\
 625                  __libc_atexit : { *(__libc_atexit) }\
 626                  PROVIDE(__stop___libc_atexit = .);\
 627                  PROVIDE(__start___libc_thread_subfreeres = .);\
 628                  __libc_thread_subfreeres : { *(__libc_thread_subfreeres) }\
 629                  PROVIDE(__stop___libc_thread_subfreeres = .);\
 630                  PROVIDE(__start___libc_IO_vtables = .);\
 631                  __libc_IO_vtables : { *(__libc_IO_vtables) }\
 632                  PROVIDE(__stop___libc_IO_vtables = .);\
 633                  /DISCARD/ : { *(.gnu.glibc-stub.*) }@'
 634         test -s $@T
 635         mv -f $@T $@
 636 common-generated += shlib.lds
 637
 638 shlib-lds = $(common-objpfx)shlib.lds
 639 shlib-lds-flags = -T $(shlib-lds)
 640 endif
 641
 642 define build-shlib
 643 $(build-shlib-helper) -o $@ $(shlib-lds-flags) \
 644           $(csu-objpfx)abi-note.o $(build-shlib-objlist)
 645 endef
 646
 647 define build-module-helper
 648 $(LINK.o) -shared -static-libgcc $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
 649           $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
 650           -B$(csu-objpfx) $(load-map-file) \
 651           $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
 652           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 653 endef
 654
 655 # This macro is similar to build-shlib but it does not define a soname
 656 # and it does not depend on the destination name to start with `lib'.
 657 # binutils only position loadable notes into the first page for binaries,
 658 # not for shared objects
 659 define build-module
 660 $(build-module-helper) -o $@ $(shlib-lds-flags) \
 661           $(csu-objpfx)abi-note.o $(build-module-objlist) $(link-libc-args)
 662 $(call after-link,$@)
 663 endef
 664 define build-module-asneeded
 665 $(build-module-helper) -o $@ $(shlib-lds-flags) \
 666           $(csu-objpfx)abi-note.o \
 667           -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed \
 668           $(link-libc-args)
 669 $(call after-link,$@)
 670 endef
 671
 672 build-module-helper-objlist = \
 673         $(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\
 674                    $(filter-out %.lds $(map-file) $(+preinit) $(+postinit) \
 675                                 $(link-libc-deps),$^))
 676
 677 build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so)
 678 build-shlib-objlist = $(build-module-helper-objlist) \
 679                       $(LDLIBS-$(@F:lib%.so=%).so)
 680
 681 # Don't try to use -lc when making libc.so itself.
 682 # Also omits crti.o and crtn.o, which we do not want
 683 # since we define our own `.init' section specially.
 684 LDFLAGS-c.so = -nostdlib -nostartfiles
 685 # But we still want to link libc.so against $(libc.so-gnulib).
 686 LDLIBS-c.so += $(libc.so-gnulib)
 687 # Give libc.so an entry point and make it directly runnable itself.
 688 LDFLAGS-c.so += -e __libc_main
 689 # Pre-link the objects of libc_pic.a so that we can locally resolve
 690 # COMMON symbols before we link against ld.so.  This is because ld.so
 691 # contains some of libc_pic.a already, which will prevent the COMMONs
 692 # from being allocated in libc.so, which introduces evil dependencies
 693 # between libc.so and ld.so, which can make it impossible to upgrade.
 694 $(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
 695         $(LINK.o) -nostdlib -nostartfiles -r -o $@ \
 696         $(LDFLAGS-c_pic.os) -Wl,-d $(whole-archive) $^ -o $@
 697
 698 ifeq (,$(strip $(shlib-lds-flags)))
 699 # Generate a list of -R options to excise .gnu.glibc-stub.* sections.
 700 $(common-objpfx)libc_pic.opts: $(common-objpfx)libc_pic.os
 701         $(OBJDUMP) -h $< | \
 702         $(AWK) '$$2 ~ /\.gnu\.glibc-stub\./ { print "-R", $$2 }' \
 703                 > $@T
 704         mv -f $@T $@
 705 # Apply those -R options.
 706 $(common-objpfx)libc_pic.os.clean: $(common-objpfx)libc_pic.opts \
 707                                    $(common-objpfx)libc_pic.os
 708         $(OBJCOPY) @$^ $@
 709 generated += libc_pic.opts libc_pic.os.clean
 710
 711 libc_pic_clean := .clean
 712 endif
 713
 714 # Build a possibly-modified version of libc_pic.a for use in building
 715 # linkobj/libc.so.
 716 ifeq (,$(filter sunrpc,$(subdirs)))
 717 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a
 718         $(make-target-directory)
 719         ln -f $< $@
 720 else
 721 $(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a \
 722                                     $(common-objpfx)sunrpc/librpc_compat_pic.a
 723         $(make-target-directory)
 724         (cd $(common-objpfx)linkobj; \
 725          $(AR) x ../libc_pic.a; \
 726          rm $$($(AR) t ../sunrpc/librpc_compat_pic.a | sed 's/^compat-//'); \
 727          $(AR) x ../sunrpc/librpc_compat_pic.a; \
 728          $(AR) cr libc_pic.a *.os; \
 729          rm *.os)
 730 endif # $(subdirs) contains sunrpc
 731
 732 # Clear link-libc-deps for the libc.so libraries so build-shlibs does not
 733 # filter ld.so out of the list of linked objects.
 734 $(common-objpfx)libc.so: link-libc-deps = # empty
 735 $(common-objpfx)linkobj/libc.so: link-libc-deps = # empty
 736
 737 # Use our own special initializer and finalizer files for the libc.so
 738 # libraries.
 739 $(common-objpfx)libc.so: $(elf-objpfx)soinit.os \
 740                          $(common-objpfx)libc_pic.os$(libc_pic_clean) \
 741                          $(elf-objpfx)sofini.os \
 742                          $(elf-objpfx)interp.os \
 743                          $(elf-objpfx)ld.so \
 744                          $(shlib-lds)
 745         $(build-shlib)
 746         $(call after-link,$@)
 747
 748 $(common-objpfx)linkobj/libc.so: $(elf-objpfx)soinit.os \
 749                          $(common-objpfx)linkobj/libc_pic.a \
 750                          $(elf-objpfx)sofini.os \
 751                          $(elf-objpfx)interp.os \
 752                          $(elf-objpfx)ld.so \
 753                          $(shlib-lds)
 754         $(build-shlib)
 755         $(call after-link,$@)
 756
 757 ifeq ($(build-shared),yes)
 758 $(common-objpfx)libc.so: $(common-objpfx)libc.map
 759 endif
 760 common-generated += libc.so libc_pic.os
 761 ifdef libc.so-version
 762 $(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
 763         $(make-link)
 764 common-generated += libc.so$(libc.so-version)
 765 endif
 766 endif
 767 \f
 768 # Figure out the source filenames in this directory.
 769
 770 override sources := $(addsuffix .c,\
 771                         $(filter-out $(elided-routines),\
 772                             $(routines) $(aux) \
 773                             $(sysdep_routines)))
 774 sysdep_routines := $(sysdep_routines)
 775
 776 headers := $(headers) $(sysdep_headers)
 777
 778 # This is the list of all object files, gotten by
 779 # replacing every ".c" in `sources' with a ".o".
 780 override objects := $(addprefix $(objpfx),$(sources:.c=.o))
 781
 782
 783 # The makefile may define $(extra-libs) with `libfoo libbar'
 784 # to build libfoo.a et al from the modules listed in $(libfoo-routines).
 785 ifdef extra-libs
 786 # extra-lib.mk is included once for each extra lib to define rules
 787 # to build it, and to add its objects to the various variables.
 788 # During its evaluation, $(lib) is set to the name of the library.
 789 extra-libs-left := $(extra-libs)
 790 include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
 791 endif
 792
 793
 794 # The makefile may define $(modules-names) to build additional modules.
 795 # These are built with $(build-module), except any in $(modules-names-nobuild).
 796 ifdef modules-names
 797 # extra-lib.mk is included once for each extra lib to define rules
 798 # to build it, and to add its objects to the various variables.
 799 # During its evaluation, $(lib) is set to the name of the library.
 800 extra-modules-left := $(modules-names)
 801 include $(patsubst %,$(..)extra-modules.mk,$(modules-names))
 802
 803 extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names))
 804 $(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \
 805                 $(objpfx)%.os $(shlib-lds) $(link-libs-deps)
 806         $(build-module)
 807 endif
 808 \f
 809 +depfiles := $(sources:.c=.d) \
 810              $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \
 811              $(patsubst %.oS,%.d,$(filter %.oS,$(extra-objs))) \
 812              $(patsubst %.o,%.d,$(filter %.o,$(extra-test-objs:.os=.o))) \
 813              $(addsuffix .d,$(tests) $(xtests) $(test-srcs))
 814 ifeq ($(build-programs),yes)
 815 +depfiles += $(addsuffix .d,$(others) $(sysdep-others))
 816 endif
 817 +depfiles := $(addprefix $(objpfx),\
 818                          $(filter-out $(addsuffix .d,$(omit-deps)),\
 819                                       $(+depfiles)))
 820 all-dt-files := $(foreach o,$(object-suffixes-for-libc),$(+depfiles:.d=$o.dt))
 821 +depfiles := $(patsubst %.dt,%.d,$(wildcard $(all-dt-files))) \
 822              $(wildcard $(all-dt-files:.dt=.d))
 823
 824 # This is a funny rule in that it removes its input file.
 825 %.d: %.dt
 826         @sed $(sed-remove-objpfx) $< > $(@:.d=.T) && \
 827          mv -f $(@:.d=.T) $@ && \
 828          rm -f $<
 829
 830 # Avoid the .h.d files for any .sym files whose .h files don't exist yet.
 831 # They will be generated when they're needed, and trying too early won't work.
 832 +gen-as-const := $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
 833 +depfiles += $(addsuffix .d,$(filter $(wildcard $(+gen-as-const)),\
 834                                                 $(+gen-as-const)))
 835
 836 ifdef +depfiles
 837 ifneq ($(no_deps),t)
 838 -include $(+depfiles)
 839 endif
 840 endif
 841 \f\f
 842 # Maximize efficiency by minimizing the number of rules.
 843 .SUFFIXES:      # Clear the suffix list.  We don't use suffix rules.
 844 # Don't define any builtin rules.
 845 MAKEFLAGS := $(MAKEFLAGS)r
 846
 847 # Generic rule for making directories.
 848 %/:
 849 # mkdir isn't smart enough to strip a trailing /.
 850 # We always require a mkdir which supports the -p option to avoid error
 851 # messages in case of races.
 852         mkdir -p $(@:%/=%)
 853 \f
 854 # Make sure that object files are not removed
 855 # when they are intermediates between sources and library members.
 856 .PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes))
 857
 858 # Make sure that the parent library archive is never removed.
 859 .PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 860 \f
 861 # Use the verbose option of ar and tar when not running silently.
 862 ifeq    "$(findstring s,$(MAKEFLAGS))" ""       # if not -s
 863 verbose := v
 864 else                                            # -s
 865 verbose :=
 866 endif                                           # not -s
 867
 868 ARFLAGS := r$(verbose)
 869 CREATE_ARFLAGS := cru$(verbose)
 870 \f
 871 # This makes all the object files in the parent library archive.
 872
 873 .PHONY: lib lib-noranlib
 874 lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 875 lib-noranlib: libobjs
 876
 877 # For object-suffix $o, the list of objects with that suffix.
 878 # Makefiles can define `elide-routines.so = foo' to leave foo.so out.
 879 o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
 880                                                        $(elide-routines$o)),\
 881                                             $(objects))) \
 882             $(addprefix $(objpfx),$(o-objects$o))
 883
 884 others: $(addprefix $(objpfx),$(install-lib))
 885
 886 ifndef objects
 887
 888 # Create the stamp$o files to keep the parent makefile happy.
 889 subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 890 $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o):
 891         $(make-target-directory)
 892         rm -f $@; > $@
 893 else
 894
 895 # Define explicit rules to update each $(objpfx)stamp.SUFFIX
 896 # timestamp file; these rules (one explicit rule is generated for each
 897 # object suffix) write a list of objects to update in the stamp file.
 898 # The parent will then actually add them all to the archive in the
 899 # archive rule, below.
 900 define o-iterator-doit
 901 $(objpfx)stamp$o: $(o-objects); $$(do-stamp)
 902 endef
 903 define do-stamp
 904 $(make-target-directory)
 905 echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T
 906 mv -f $@T $@
 907 endef
 908 object-suffixes-left := $(object-suffixes-for-libc)
 909 include $(o-iterator)
 910
 911 endif
 912
 913 # Now define explicit rules to build the library archives; these depend
 914 # on the stamp files built above.
 915 define o-iterator-doit
 916 $(common-objpfx)$(patsubst %,$(libtype$o),c): \
 917                 $(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib)
 918 endef
 919 define do-makelib
 920 cd $(common-objdir) && \
 921 $(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)`
 922 endef
 923 subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%)
 924 subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
 925 ifndef subdir
 926 $(subdirs-stamps): subdir_lib;
 927 endif
 928 object-suffixes-left = $(object-suffixes-for-libc)
 929 include $(o-iterator)
 930
 931
 932 # This makes all the object files.
 933 .PHONY: objects objs libobjs extra-objs
 934 objects objs: libobjs extra-objs
 935 libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 936 extra-objs: $(addprefix $(objpfx),$(extra-objs))
 937
 938 # Canned sequence for building an extra library archive.
 939 define build-extra-lib
 940 $(patsubst %/,cd % &&,$(objpfx)) \
 941 $(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \
 942       $(patsubst $(objpfx)%,%,$^)
 943 endef
 944 \f
 945 # Installation.
 946
 947 .PHONY: force-install
 948 force-install:
 949
 950 # $(install-lib) are installed from the object directory into $(libdir);
 951 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
 952 # unless they also appear in $(non-lib.a).  $(install-data) are installed as
 953 # they are into $(datadir).  $(headers) are installed as they are in
 954 # $(includedir).  $(install-bin), $(install-bin-script) and $(install-sbin)
 955 # are installed from the object directory into $(bindir), $(bindir) and
 956 # $(sbindir), respectively.  $(install-others) and $(install-others-programs)
 957 # are absolute path names of files to install; rules to install them are
 958 # defined elsewhere.
 959
 960 # The simple library name to install libc.a under.
 961 # This could be defined by a sysdep Makefile.
 962 ifndef libc-name
 963 libc-name := c
 964 endif
 965
 966 define do-install
 967 $(make-target-directory)
 968 $(INSTALL_DATA) $< $@
 969 endef
 970
 971 # Make the target directory if it doesn't exist, using the `mkinstalldirs'
 972 # script that does `mkdir -p' even if `mkdir' doesn't support that flag.
 973 define make-target-directory
 974 $(addprefix $(..)./scripts/mkinstalldirs ,\
 975             $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
 976 endef
 977
 978 # Any directory (parent or subdir) should install libc.a; this way
 979 # "make install" in a subdir is guaranteed to install everything it changes.
 980 installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
 981                              $(inst_libdir)/$(patsubst %,$(libtype$o),\
 982                                                      $(libprefix)$(libc-name)))
 983
 984 .PHONY: check-install-supported
 985 check-install-supported:
 986
 987 # Check to see if the prefix or exec_prefix GNU standard variable
 988 # has been overridden on the command line and, if so, fail with
 989 # an error message since doing so is not supported (set DESTDIR
 990 # instead).
 991 ifeq ($(origin prefix),command line)
 992 check-install-supported:
 993         $(error Overriding prefix is not supported. Set DESTDIR instead.)
 994 endif
 995
 996 ifeq ($(origin exec_prefix),command line)
 997 check-install-supported:
 998         $(error Overriding exec_prefix is not supported. Set DESTDIR instead.)
 999 endif
1000
1001 install: check-install-supported
1002
1003 install: $(installed-libcs)
1004 $(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
1005         $(make-target-directory)
1006         $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
1007
1008 define do-install-program
1009 $(make-target-directory)
1010 $(INSTALL_PROGRAM) $< $@.new
1011 mv -f $@.new $@
1012 endef
1013
1014 define do-install-script
1015 $(make-target-directory)
1016 $(INSTALL_SCRIPT) $< $@.new
1017 mv -f $@.new $@
1018 endef
1019
1020 install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
1021 install-lib := $(filter-out %.so %_pic.a,$(install-lib))
1022
1023 ifeq (yes,$(build-shared))
1024 # Find which .so's have versions.
1025 versioned := $(strip $(foreach so,$(install-lib.so),\
1026                                $(patsubst %,$(so),$($(so)-version))))
1027
1028 install-lib.so-versioned := $(filter $(versioned), $(install-lib.so))
1029 install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so))
1030
1031 # For versioned libraries, we install three files:
1032 #       $(inst_libdir)/libfoo.so        -- for linking, symlink or ld script
1033 #       $(inst_slibdir)/libfoo.so.NN    -- for loading by SONAME, symlink
1034 #       $(inst_slibdir)/libfoo-X.Y.Z.so -- the real shared object file
1035 lib-version := $(firstword $($(subdir)-version) $(version))
1036 install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \
1037                       $(foreach L,$(install-lib.so-versioned),\
1038                                 $(inst_libdir)/$L \
1039                                 $(inst_slibdir)/$(L:.so=)-$(lib-version).so \
1040                                 $(inst_slibdir)/$L$($L-version))
1041
1042 # Install all the unversioned shared libraries.
1043 $(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \
1044     $(objpfx)%.so $(+force)
1045         $(do-install-program)
1046
1047 ifneq ($(findstring -s,$(LN_S)),)
1048 define make-link
1049 rm -f $@.new
1050 $(SHELL) $(..)scripts/rellns-sh $< $@.new
1051 mv -f $@.new $@
1052 endef
1053 else
1054 # If we have no symbolic links don't bother with rellns-sh.
1055 define make-link
1056 rm -f $@.new
1057 $(LN_S) $< $@.new
1058 mv -f $@.new $@
1059 endef
1060 endif
1061
1062 ifeq (yes,$(build-shared))
1063 ifeq (no,$(cross-compiling))
1064 symbolic-link-prog := $(elf-objpfx)sln
1065 symbolic-link-list := $(elf-objpfx)symlink.list
1066 define make-shlib-link
1067 echo `$(..)scripts/rellns-sh -p $< $@` $@ >> $(symbolic-link-list)
1068 endef
1069 else # cross-compiling
1070 # We need a definition that can be used by elf/Makefile's install rules.
1071 symbolic-link-prog = $(LN_S)
1072 endif
1073 endif
1074 ifndef make-shlib-link
1075 define make-shlib-link
1076 rm -f $@
1077 $(LN_S) `$(..)scripts/rellns-sh -p $< $@` $@
1078 endef
1079 endif
1080
1081 ifdef libc.so-version
1082 # For a library specified to be version N, install three files:
1083 # libc.so       ->      libc.so.N       (e.g. libc.so.6)
1084 # libc.so.6     ->      libc-VERSION.so (e.g. libc-1.10.so)
1085
1086 $(inst_slibdir)/libc.so$(libc.so-version): $(inst_slibdir)/libc-$(version).so \
1087                                            $(+force)
1088         $(make-shlib-link)
1089 $(inst_slibdir)/libc-$(version).so: $(common-objpfx)libc.so $(+force)
1090         $(do-install-program)
1091 install: $(inst_slibdir)/libc.so$(libc.so-version)
1092
1093 # This fragment of linker script gives the OUTPUT_FORMAT statement
1094 # for the configuration we are building.  We put this statement into
1095 # the linker scripts we install for -lc et al so that they will not be
1096 # used by a link for a different format on a multi-architecture system.
1097 $(common-objpfx)format.lds: $(..)scripts/output-format.sed \
1098                             $(common-objpfx)config.make \
1099                             $(common-objpfx)config.h $(..)Makerules
1100 ifneq (unknown,$(output-format))
1101         echo > $@.new 'OUTPUT_FORMAT($(output-format))'
1102 else
1103         $(LINK.o) -shared $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
1104                   $(LDFLAGS.so) $(LDFLAGS-lib.so) \
1105                   -x c /dev/null -o $@.so -Wl,--verbose -v 2>&1 \
1106         | sed -n -f $< > $@.new
1107         test -s $@.new
1108         rm -f $@.so
1109 endif
1110         mv -f $@.new $@
1111 common-generated += format.lds
1112
1113 ifndef subdir
1114 # What we install as libc.so for programs to link against is in fact a
1115 # link script.  It contains references for the various libraries we need.
1116 # The libc.so object is not complete since some functions are only defined
1117 # in libc_nonshared.a.
1118 # We need to use absolute paths since otherwise local copies (if they exist)
1119 # of the files are taken by the linker.
1120 install: $(inst_libdir)/libc.so
1121 $(inst_libdir)/libc.so: $(common-objpfx)format.lds \
1122                         $(common-objpfx)libc.so$(libc.so-version) \
1123                         $(inst_libdir)/$(patsubst %,$(libtype.oS),\
1124                                                   $(libprefix)$(libc-name)) \
1125                         $(+force)
1126         (echo '/* GNU ld script';\
1127          echo '   Use the shared library, but some functions are only in';\
1128          echo '   the static library, so try that secondarily.  */';\
1129          cat $<; \
1130          echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \
1131               '$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\
1132               ' AS_NEEDED (' $(rtlddir)/$(rtld-installed-name) ') )' \
1133         ) > $@.new
1134         mv -f $@.new $@
1135
1136 endif
1137
1138 else
1139 install: $(inst_slibdir)/libc.so
1140 $(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force)
1141         $(do-install-program)
1142 endif
1143
1144 ifneq (,$(versioned))
1145 # Produce three sets of rules as above for all the smaller versioned libraries.
1146
1147 define o-iterator-doit
1148 $(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link)
1149 endef
1150 object-suffixes-left := $(filter-out $(install-lib-ldscripts),$(versioned))
1151 ifneq (,$(object-suffixes-left))
1152 include $(o-iterator)
1153 endif
1154
1155 # Make symlinks in the build directory, because the versioned names might
1156 # be referenced by a DT_NEEDED in another library.
1157 define o-iterator-doit
1158 $(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
1159 endef
1160 object-suffixes-left := $(versioned)
1161 include $(o-iterator)
1162
1163 generated += $(foreach o,$(versioned),$o$($o-version))
1164
1165 ifeq (,$($(subdir)-version))
1166 define o-iterator-doit
1167 $(inst_slibdir)/$o$($o-version): $(inst_slibdir)/$(o:.so=)-$(version).so \
1168                                  $(+force);
1169         $$(make-shlib-link)
1170 endef
1171 object-suffixes-left := $(versioned)
1172 include $(o-iterator)
1173
1174 define o-iterator-doit
1175 $(inst_slibdir)/$(o:.so=)-$(version).so: $(objpfx)$o $(+force);
1176         $$(do-install-program)
1177 endef
1178 object-suffixes-left := $(versioned)
1179 include $(o-iterator)
1180 else
1181 define o-iterator-doit
1182 $(inst_slibdir)/$o$($o-version): \
1183   $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so $(+force);
1184         $$(make-shlib-link)
1185 endef
1186 object-suffixes-left := $(versioned)
1187 include $(o-iterator)
1188
1189 define o-iterator-doit
1190 $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so: $(objpfx)$o $(+force);
1191         $$(do-install-program)
1192 endef
1193 object-suffixes-left := $(versioned)
1194 include $(o-iterator)
1195 endif
1196 endif
1197
1198 define do-install-so
1199 $(do-install-program)
1200 $(patsubst %,$(LN_S) -f $(@F) \
1201                         $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
1202            $(filter-out %.so,$@))
1203 endef
1204
1205 so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
1206 $(foreach v,$(so-versions),\
1207           $(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \
1208                                                $(+force)
1209         $(do-install-so)
1210 $(foreach v,$(so-versions),\
1211           $(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force)
1212         $(do-install-so)
1213 endif
1214
1215 ifdef install-bin
1216 $(addprefix $(inst_bindir)/,$(install-bin)): \
1217     $(inst_bindir)/%: $(objpfx)% $(+force)
1218         $(do-install-program)
1219 endif
1220 ifdef install-bin-script
1221 $(addprefix $(inst_bindir)/,$(install-bin-script)): \
1222     $(inst_bindir)/%: $(objpfx)% $(+force)
1223         $(do-install-script)
1224 endif
1225 ifdef install-rootsbin
1226 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \
1227    $(inst_rootsbindir)/%: $(objpfx)% $(+force)
1228         $(do-install-program)
1229 endif
1230 ifdef install-sbin
1231 $(addprefix $(inst_sbindir)/,$(install-sbin)): \
1232     $(inst_sbindir)/%: $(objpfx)% $(+force)
1233         $(do-install-program)
1234 endif
1235 ifdef install-lib
1236 install-lib.a := $(filter lib%.a,$(install-lib))
1237 install-lib.a := $(filter-out $(install-lib-ldscripts),$(install-lib.a))
1238 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
1239 ifdef install-lib-non.a
1240 $(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
1241   $(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force)
1242         $(do-install)
1243 endif
1244 ifdef install-lib.a
1245 $(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \
1246   $(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force)
1247         $(do-install)
1248 endif
1249 endif
1250 ifdef install-data
1251 $(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force)
1252         $(do-install)
1253 endif
1254 headers := $(strip $(headers))
1255 ifdef headers
1256 # This implicit rule installs headers from the source directory.
1257 # It may be ignored in preference to rules from sysd-rules to find
1258 # headers in the sysdeps tree.
1259 $(inst_includedir)/%.h: $(objpfx)%.h $(+force)
1260         $(do-install)
1261 $(inst_includedir)/%.h: $(common-objpfx)%.h $(+force)
1262         $(do-install)
1263 $(inst_includedir)/%.h: %.h $(+force)
1264         $(do-install)
1265 $(inst_includedir)/%.h: $(..)include/%.h $(+force)
1266         $(do-install)
1267 headers-nonh := $(filter-out %.h,$(headers))
1268 ifdef headers-nonh
1269 $(addprefix $(inst_includedir)/,$(headers-nonh)): $(inst_includedir)/%: \
1270                                                  % $(+force)
1271         $(do-install)
1272 endif   # headers-nonh
1273 endif   # headers
1274
1275 .PHONY: install-bin-nosubdir install-bin-script-nosubdir \
1276         install-rootsbin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
1277         install-data-nosubdir install-headers-nosubdir
1278 install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin))
1279 install-bin-script-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin-script))
1280 install-rootsbin-nosubdir: \
1281         $(addprefix $(inst_rootsbindir)/,$(install-rootsbin))
1282 install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin))
1283 install-lib-nosubdir: $(addprefix $(inst_libdir)/,\
1284                        $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
1285                        $(addprefix $(libprefix),$(install-lib-non.a)))
1286 install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data))
1287 install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers))
1288 install-others-nosubdir: $(install-others)
1289 install-others-programs-nosubdir: $(install-others-programs)
1290
1291 # We need all the `-nosubdir' targets so that `install' in the parent
1292 # doesn't depend on several things which each iterate over the subdirs.
1293 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
1294 # subroutine.  Then in the parent `install-FOO' also causes subdir makes.
1295 install-%:: install-%-nosubdir ;
1296
1297 .PHONY: install install-no-libc.a-nosubdir
1298 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir \
1299                             install-lib-nosubdir install-others-nosubdir
1300 ifeq ($(build-programs),yes)
1301 install-no-libc.a-nosubdir: install-bin-nosubdir install-bin-script-nosubdir \
1302                             install-rootsbin-nosubdir install-sbin-nosubdir \
1303                             install-others-programs-nosubdir
1304 endif
1305 install: install-no-libc.a-nosubdir
1306 \f
1307 # Command to compile $< using the native libraries.
1308 define native-compile
1309 $(make-target-directory)
1310 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
1311             $< $(OUTPUT_OPTION) $(BUILD_LDFLAGS)
1312 endef
1313
1314 # We always want to use configuration definitions.
1315 ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) -D_GNU_SOURCE \
1316                    -DIS_IN_build -include $(common-objpfx)config.h
1317
1318 # Support the GNU standard name for this target.
1319 .PHONY: check
1320 check: tests
1321 # Special target to run tests which cannot be run unconditionally.
1322 # Maintainers should use this target.
1323 .PHONY: xcheck
1324 xcheck: xtests
1325
1326 all-nonlib = $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) $(others))
1327 ifneq (,$(all-nonlib))
1328 cpp-srcs-left = $(all-nonlib)
1329 lib := nonlib
1330 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
1331 endif
1332
1333
1334 ifeq ($(build-shared),yes)
1335 # Generate normalized lists of symbols, versions, and data sizes.
1336 # This is handy for checking against existing library binaries.
1337
1338 %.symlist: $(..)scripts/abilist.awk %.dynsym
1339         LC_ALL=C $(AWK) -f $^ > $@T
1340         mv -f $@T $@
1341
1342 %.dynsym: %.so
1343         LC_ALL=C $(OBJDUMP) --dynamic-syms $< > $@T
1344         mv -f $@T $@
1345
1346 # A sysdeps/.../Makefile can set abilist-pattern to something like
1347 # %-foo.abilist to look for libc-foo.abilist instead of libc.abilist.
1348 # This makes sense if multiple ABIs can be most cleanly supported by a
1349 # configuration without using separate sysdeps directories for each.
1350 ifdef abilist-pattern
1351 vpath $(abilist-pattern) $(+sysdep_dirs)
1352 endif
1353
1354 vpath %.abilist $(+sysdep_dirs)
1355
1356 # The .PRECIOUS rule prevents the files built by an implicit rule whose
1357 # target pattern is %.symlist from being considered "intermediate files"
1358 # and automatically removed.  We only want these files to be removed by
1359 # 'make clean', which is handled by the 'generated' variable.
1360 .PRECIOUS: %.symlist
1361 generated += $(extra-libs:=.symlist)
1362
1363 ifdef abilist-pattern
1364 $(objpfx)check-abi-%.out: $(common-objpfx)config.make $(abilist-pattern) \
1365                           $(objpfx)%.symlist
1366         $(check-abi-pattern); \
1367         $(evaluate-test)
1368 $(objpfx)check-abi-%.out: $(common-objpfx)config.make $(abilist-pattern) \
1369                           $(common-objpfx)%.symlist
1370         $(check-abi-pattern); \
1371         $(evaluate-test)
1372 endif
1373 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1374                           $(objpfx)%.symlist
1375         $(check-abi); \
1376         $(evaluate-test)
1377 $(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
1378                           $(common-objpfx)%.symlist
1379         $(check-abi); \
1380         $(evaluate-test)
1381 define check-abi-pattern
1382         diff -p -U 0 $(filter $(abilist-pattern),$^) $(filter %.symlist,$^) \
1383              > $@
1384 endef
1385 define check-abi
1386         diff -p -U 0 $(filter %.abilist,$^) $(filter %.symlist,$^) > $@
1387 endef
1388
1389 ifdef abilist-pattern
1390 update-abi-%: $(objpfx)%.symlist $(abilist-pattern)
1391         $(update-abi-pattern)
1392 update-abi-%: $(common-objpfx)%.symlist $(abilist-pattern)
1393         $(update-abi-pattern)
1394 endif
1395 update-abi-%: $(objpfx)%.symlist %.abilist
1396         $(update-abi)
1397 update-abi-%: $(common-objpfx)%.symlist %.abilist
1398         $(update-abi)
1399 define update-abi-pattern
1400 @if cmp -s $^ 2> /dev/null; \
1401  then \
1402       echo '+++ $(filter $(abilist-pattern),$^) is unchanged'; \
1403  else cp -f $^; \
1404       echo '*** Now check $(filter $(abilist-pattern),$^) changes for correctness ***'; \
1405  fi
1406 endef
1407 define update-abi
1408 @if cmp -s $^ 2> /dev/null; \
1409  then \
1410       echo '+++ $(filter %.abilist,$^) is unchanged'; \
1411  else cp -f $^; \
1412       echo '*** Now check $(filter %.abilist,$^) changes for correctness ***'; \
1413  fi
1414 endef
1415
1416 # Patch all .abilist files for one DSO.  The find command locates
1417 # abilist files for all architectures.  The regular expression in the
1418 # find invocation is needed to separate libc.abilist and
1419 # libcrypt.abilist, for example.  It assumes that abilist-pattern, if
1420 # set, is of the form "%-SUFFIX", and not "%SUFFIX", that is, there is
1421 # a non-alphanumeric seperator between the pattern and the suffix
1422 # added.  The abilist files in /generic/ are filtered out because
1423 # these are expected to remain empty.
1424 define update-all-abi
1425 $(SHELL) $(..)scripts/update-abilist.sh $^ \
1426   $$(find $(..)sysdeps \
1427     -regextype posix-egrep -regex '.*/$*([^a-z0-9].*)?\.abilist$$' \
1428     \! -regex '.*/generic/.*')
1429 endef
1430 ifdef abilist-pattern
1431 update-all-abi-%: $(abilist-pattern) $(objpfx)%.symlist
1432         $(update-all-abi)
1433 update-all-abi-%: $(abilist-pattern) $(common-objpfx)%.symlist
1434         $(update-all-abi)
1435 endif
1436 update-all-abi-%: %.abilist $(objpfx)%.symlist
1437         $(update-all-abi)
1438 update-all-abi-%: %.abilist $(common-objpfx)%.symlist
1439         $(update-all-abi)
1440
1441 .PHONY: update-abi update-all-abi check-abi
1442 update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned))
1443 update-all-abi: $(patsubst %.so,update-all-abi-%,$(install-lib.so-versioned))
1444 check-abi-list = $(patsubst %.so,$(objpfx)check-abi-%.out, \
1445                                  $(install-lib.so-versioned))
1446 check-abi: $(check-abi-list)
1447 ifdef subdir
1448 subdir_check-abi: check-abi
1449 subdir_update-abi: update-abi
1450 subdir_update-all-abi: update-all-abi
1451 else
1452 check-abi: subdir_check-abi
1453         if grep -q '^FAIL:' $(objpfx)*/check-abi*.test-result; then \
1454                 cat $(objpfx)*/check-abi*.out && exit 1; fi
1455 update-abi: subdir_update-abi
1456 update-all-abi: subdir_update-all-abi
1457 endif
1458
1459 ifeq ($(subdir),elf)
1460 check-abi: $(objpfx)check-abi-libc.out
1461 tests-special += $(objpfx)check-abi-libc.out
1462 update-abi: update-abi-libc
1463 update-all-abi: update-all-abi-libc
1464 common-generated += libc.symlist
1465 endif
1466
1467 ifeq ($(build-shared),yes)
1468 ifdef subdir
1469 tests-special += $(check-abi-list)
1470 endif
1471 endif
1472
1473 endif
1474 \f
1475 # These will have been set by sysdeps/posix/Makefile.
1476 L_tmpnam  ?= 1
1477 TMP_MAX   ?= 0
1478 L_ctermid ?= 1
1479 L_cuserid ?= 1
1480
1481 stdio_lim = $(common-objpfx)bits/stdio_lim.h
1482
1483 $(stdio_lim:lim.h=%.h) $(stdio_lim:lim.h=%.d): $(stdio_lim:lim.h=%.st); @:
1484 $(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \
1485                    $(common-objpfx)config.make
1486         $(make-target-directory)
1487         { echo '#include "$(..)posix/bits/posix1_lim.h"';               \
1488           echo '#define _LIBC 1';                                       \
1489           echo '#include "$(..)misc/sys/uio.h"'; } |                    \
1490         $(CC) -E -dM -MD -MP -MF $(@:st=dT) -MT '$(@:st=h) $(@:st=d)'   \
1491               $(CPPUNDEFS) $(+includes) -xc - -o $(@:st=hT)
1492         sed $(sed-remove-objpfx) $(sed-remove-dotdot)                   \
1493             $(@:st=dT) > $(@:st=dt)
1494         mv -f $(@:st=dt) $(@:st=d)
1495         fopen_max=`sed -n 's/^#define OPEN_MAX //1p' $(@:st=hT)`;       \
1496         filename_max=`sed -n 's/^#define PATH_MAX //1p' $(@:st=hT)`;    \
1497         iov_max=`sed -n 's/^#define UIO_MAXIOV //p' $(@:st=hT)`;        \
1498         fopen_max=$${fopen_max:-16};                                    \
1499         filename_max=$${filename_max:-1024};                            \
1500         if [ -z "$$iov_max" ]; then                                     \
1501           define_iov_max="# undef IOV_MAX";                             \
1502         else                                                            \
1503           define_iov_max="# define IOV_MAX $$iov_max";                  \
1504         fi;                                                             \
1505         sed -e "s/@FOPEN_MAX@/$$fopen_max/"                             \
1506             -e "s/@FILENAME_MAX@/$$filename_max/"                       \
1507             -e "s/@L_tmpnam@/$(L_tmpnam)/"                              \
1508             -e "s/@TMP_MAX@/$(TMP_MAX)/"                                \
1509             -e "s/@L_ctermid@/$(L_ctermid)/"                            \
1510             -e "s/@L_cuserid@/$(L_cuserid)/"                            \
1511             -e "s/@define_IOV_MAX@/$$define_iov_max/"                   \
1512             $< > $(@:st=h.new)
1513         $(move-if-change) $(@:st=h.new) $(@:st=h)
1514 # Remove these last so that they can be examined if something went wrong.
1515         rm -f $(@:st=hT) $(@:st=dT) $(@:st=dt)
1516         touch $@
1517 # Get dependencies.
1518 ifndef no_deps
1519 -include $(stdio_lim:h=d)
1520 endif
1521 common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st
1522 \f
1523 FORCE:
1524
1525 .PHONY: echo-headers
1526 echo-headers:
1527         @echo $(headers)
1528
1529 %.bz2: %; bzip2 -9vk $<
1530 %.gz: %; gzip -9vnc $< > $@.new && mv -f $@.new $@
1531 %.xz: %; xz -9evk $<
1532 \f
1533 # Common cleaning targets.
1534
1535 .PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean
1536 clean: common-clean
1537 mostlyclean: common-mostlyclean
1538
1539 do-tests-clean:
1540         -rm -f $(addprefix $(objpfx),$(addsuffix .out,$(tests) $(xtests) \
1541                                                       $(test-srcs)) \
1542                                      $(addsuffix .test-result,$(tests) \
1543                                                               $(xtests) \
1544                                                               $(test-srcs)))
1545
1546 # Remove the object files.
1547 common-mostlyclean:
1548         -rm -f $(addprefix $(objpfx),$(tests) $(xtests) $(test-srcs) \
1549                                      $(others) $(sysdep-others) stubs \
1550                                      $(addsuffix .o,$(tests) $(xtests) \
1551                                                     $(test-srcs) $(others) \
1552                                                     $(sysdep-others)) \
1553                                      $(addsuffix .out,$(tests) $(xtests) \
1554                                                       $(test-srcs)) \
1555                                      $(addsuffix .test-result,$(tests) \
1556                                                               $(xtests) \
1557                                                               $(test-srcs)))
1558         -rm -f $(addprefix $(objpfx),$(extra-objs) $(extra-test-objs) \
1559                                      $(install-lib) $(install-lib.so) \
1560                                      $(install-lib.so:%.so=%_pic.a))
1561         -rm -f core
1562         -rm -f $(objpfx)rtld-*.os
1563         $(rmobjs)
1564 define rmobjs
1565 $(foreach o,$(object-suffixes-for-libc),
1566 -rm -f $(objpfx)stamp$o $(o-objects))
1567 endef
1568
1569 # Also remove the dependencies and generated source files.
1570 common-clean: common-mostlyclean
1571         -rm -f $(addprefix $(objpfx),$(generated))
1572         -rm -f $(objpfx)*.d $(objpfx)*.dt
1573         -rm -fr $(addprefix $(objpfx),$(generated-dirs))
1574         -rm -f $(addprefix $(common-objpfx),$(common-generated))
1575         -rm -f $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
1576 \f
1577 # Produce a file `stubs' which contains `#define __stub_FUNCTION'
1578 # for each function which is a stub.
1579
1580 ifdef objpfx
1581 .PHONY: stubs # The parent Makefile calls this target.
1582 stubs: $(objpfx)stubs
1583 endif
1584 objs-for-stubs := $(foreach o,$(object-suffixes-for-libc),$(o-objects)) \
1585                   $(addprefix $(objpfx),$(extra-objs))
1586 $(objpfx)stubs: $(objs-for-stubs)
1587 ifneq (,$(strip $(objs-for-stubs)))
1588         (cd $(objpfx).; $(OBJDUMP) -h $(patsubst $(objpfx)%,%,$^)) | \
1589         $(AWK) '/\.gnu\.glibc-stub\./ { \
1590                   sub(/\.gnu\.glibc-stub\./, "", $$2); \
1591                   stubs[$$2] = 1; } \
1592                 END { for (s in stubs) print "#define __stub_" s }' > $@T
1593         mv -f $@T $@
1594 else
1595         > $@
1596 endif
1597 \f
1598 ifneq (,$(strip $(gpl2lgpl)))
1599 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
1600 # Snarf from the master source and frob the copying notice.
1601 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
1602         sed -f $^ > $@-tmp
1603 # So I don't edit them by mistake.
1604         chmod a-w $@-tmp
1605         mv -f $@-tmp $@
1606 endif
1607 endif
1608
1609 # Local Variables:
1610 # mode: makefile
1611 # End: