Makerules

   1 # Copyright (C) 1991-1999, 2000,2001 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 Library General Public License as
   6 # published by the Free Software Foundation; either version 2 of the
   7 # 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 # Library General Public License for more details.
  13
  14 # You should have received a copy of the GNU Library General Public
  15 # License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16 # write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 # Boston, MA 02111-1307, USA.
  18
  19 #
  20 #       Common rules for making the GNU C library.  This file is included
  21 #       by the top-level Makefile and by all subdirectory makefiles
  22 #       (through Rules).
  23 #
  24 ifneq (,)
  25 This makefile requires GNU Make.
  26 endif
  27
  28 REQUIRED_MAKE_VERSION = 3.74
  29 REAL_MAKE_VERSION = $(firstword $(MAKE_VERSION))
  30
  31 ifneq ($(REQUIRED_MAKE_VERSION), \
  32        $(firstword $(sort $(REAL_MAKE_VERSION) $(REQUIRED_MAKE_VERSION))))
  33 Wrong GNU Make version.  See above for the version needed.
  34 endif
  35
  36
  37 ifdef   subdir
  38 ..      := ../
  39 endif   # subdir
  40
  41 # If `sources' was defined by the parent makefile, undefine it so
  42 # we will later get it from wildcard search in this directory.
  43 ifneq   "$(findstring env,$(origin sources))" ""
  44 sources :=
  45 endif
  46
  47 oPATH := $(PATH)
  48 PATH := this definition should take precedence over $(oPATH)
  49 ifeq ($(PATH),$(oPATH))
  50 You must not use the -e flag when building the GNU C library.
  51 else
  52 PATH := $(oPATH)
  53 endif
  54 \f
  55 ifndef +included-Makeconfig
  56 include $(..)Makeconfig
  57 endif
  58
  59 # `configure' writes a definition of `config-sysdirs' in `config.make'.
  60 sysdirs = $(strip $(full_config_sysdirs))
  61
  62 +sysdir_pfx = $(common-objpfx)
  63
  64 export sysdirs := $(sysdirs)
  65
  66 +sysdep_dirs := $(full_config_sysdirs)
  67 ifdef objdir
  68 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
  69 endif
  70
  71 # Add -I switches to get the right sysdep directories.
  72 # `+includes' in Makeconfig references $(+sysdep-includes).
  73 +sysdep-includes := $(addprefix -I,$(+sysdep_dirs))
  74
  75 # This variable is used in ``include $(o-iterator)'' after defining
  76 # $(o-iterator-doit) to produce some desired rule using $o for the object
  77 # suffix, and setting $(object-suffixes-left) to $(object-suffixes); a copy
  78 # is produced for each object suffix in use.
  79 o-iterator = $(patsubst %,$(..)o-iterator.mk,$(object-suffixes-left))
  80 \f
  81 # Include any system-specific makefiles.
  82
  83 # This is here so things in sysdep Makefiles can easily depend on foo.h as
  84 # appropriate and not worry about where foo.h comes from, which may be
  85 # system dependent and not known by that Makefile.
  86 vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
  87                                       $(+sysdep_dirs) $(..)))
  88
  89 # The same is true for RPC source files.
  90 vpath %.x $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
  91                                       $(+sysdep_dirs) $(..)))
  92
  93 # Some sysdep makefiles use this to distinguish being included here from
  94 # being included individually by a subdir makefile (hurd/Makefile needs this).
  95 in-Makerules := yes
  96
  97 sysdep-makefiles := $(wildcard $(full_config_sysdirs:=/Makefile))
  98 ifneq (,$(sysdep-makefiles))
  99 include $(sysdep-makefiles)
 100 endif
 101
 102
 103 # Reorder before-compile so that mach things come first, and hurd things
 104 # second, before all else.  The mach and hurd subdirectories have many
 105 # generated header files which the much of rest of the library depends on,
 106 # so it is best to build them first (and mach before hurd, at that).
 107 before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\
 108                            $(before-compile)) \
 109                   $(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
 110                                $(before-compile))
 111
 112 # Even before that, we need abi-versions.h which is generated right here.
 113 ifeq ($(versioning),yes)
 114 ifndef avoid-generated
 115 before-compile := $(common-objpfx)abi-versions.h $(before-compile)
 116 $(common-objpfx)abi-versions.h: $(..)scripts/abi-versions.awk \
 117                                 $(common-objpfx)Versions.all
 118         LC_ALL=C $(AWK) -v oldest_abi=$(oldest-abi) -f $^ > $@T
 119         mv -f $@T $@
 120 endif # avoid-generated
 121 endif # $(versioning) = yes
 122
 123
 124 # Remove existing files from `before-compile'.  Things are added there when
 125 # they must exist for dependency generation to work right, but once they
 126 # exist there is no further need for every single file to depend on them,
 127 # and those gratuitous dependencies result in many gratuitous
 128 # recompilations.
 129 before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
 130
 131 # Don't let any before-compile file be an intermediate and get removed.
 132 ifdef before-compile
 133 $(before-compile):
 134 endif
 135 \f
 136 # Generate an ordered list of implicit rules which find the source files in
 137 # each sysdep directory.  The old method was to use vpath to search all the
 138 # sysdep directories.  However, that had the problem that a .S file in a
 139 # later directory would be chosen over a .c file in an earlier directory,
 140 # which does not preserve the desired sysdeps ordering behavior.
 141
 142 # When making the list of .d files to include, we can't know which ones
 143 # have source in .s files, and thus do not in fact need a .d file.
 144 # So we must define rules to make .d files for .s files.
 145 define make-dummy-dep
 146 $(addprefix ln $(common-objpfx)dummy.d ,$(filter-out $(wildcard $@),$@))
 147 endef
 148 $(common-objpfx)dummy.d:
 149         echo '# .s files cannot contain includes, so they need no deps.' > $@
 150
 151 # It matters that this set of rules, for compiling from sources in
 152 # the current directory (the $srcdir/$subdir) come before the
 153 # generated sysdep rules in included from sysd-rules below.  When
 154 # compiling in the source tree, generated sources go into the current
 155 # directory, and those should be chosen before any sources in sysdeps.
 156 define o-iterator-doit
 157 $(objpfx)%$o: %.S $(before-compile); $$(compile-command.S)
 158 endef
 159 object-suffixes-left := $(all-object-suffixes)
 160 include $(o-iterator)
 161 $(objpfx)%.d: %.S $(before-compile); $(+make-deps)
 162
 163 define o-iterator-doit
 164 $(objpfx)%$o: %.s $(before-compile); $$(compile-command.s)
 165 endef
 166 object-suffixes-left := $(all-object-suffixes)
 167 include $(o-iterator)
 168 $(objpfx)%.d: %.s $(common-objpfx)dummy.d; $(make-dummy-dep)
 169
 170 define o-iterator-doit
 171 $(objpfx)%$o: %.c $(before-compile); $$(compile-command.c)
 172 endef
 173 object-suffixes-left := $(all-object-suffixes)
 174 include $(o-iterator)
 175 $(objpfx)%.d: %.c $(before-compile); $(+make-deps)
 176
 177 # Omit the objpfx rules when building in the source tree, because
 178 # objpfx is empty and so these rules just override the ones above.
 179 ifdef objpfx
 180 # Define first rules to find the source files in $(objpfx).
 181 # Generated source files will end up there.
 182 define o-iterator-doit
 183 $(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S)
 184 endef
 185 object-suffixes-left := $(all-object-suffixes)
 186 include $(o-iterator)
 187 $(objpfx)%.d: $(objpfx)%.S $(before-compile); $(+make-deps)
 188
 189 define o-iterator-doit
 190 $(objpfx)%$o: $(objpfx)%.s $(before-compile); $$(compile-command.s)
 191 endef
 192 object-suffixes-left := $(all-object-suffixes)
 193 include $(o-iterator)
 194 $(objpfx)%.d: $(objpfx)%.s $(common-objpfx)dummy.d; $(make-dummy-dep)
 195
 196 define o-iterator-doit
 197 $(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
 198 endef
 199 object-suffixes-left := $(all-object-suffixes)
 200 include $(o-iterator)
 201 $(objpfx)%.d: $(objpfx)%.c $(before-compile); $(+make-deps)
 202 endif
 203
 204 # System-dependent makefiles can put in `inhibit-sysdep-asm' wildcard
 205 # patterns matching sysdep directories whose assembly source files should
 206 # be suppressed.
 207 ifdef inhibit-sysdep-asm
 208 define open-check-inhibit-asm
 209 case $$sysdir in $(subst $(empty) ,|,$(inhibit-sysdep-asm))) : ;; *)
 210 endef
 211 close-check-inhibit-asm = ;; esac ;
 212 endif
 213
 214 -include $(+sysdir_pfx)sysd-rules
 215 ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
 216 # The value of $(+sysdep_dirs) the sysd-rules was computed for
 217 # differs from the one we are using now.  So force a rebuild of sysd-rules.
 218 sysd-rules-force = FORCE
 219 FORCE:
 220 endif
 221 $(+sysdir_pfx)sysd-rules: $(+sysdir_pfx)config.make $(..)Makerules \
 222                           $(wildcard $(foreach dir,$(sysdirs),\
 223                                                $(dir)/Makefile))\
 224                           $(sysd-rules-force)
 225         -@rm -f $@T
 226         (echo 'sysd-rules-sysdirs := $(config-sysdirs)';                      \
 227          for dir in $(config-sysdirs:%='$$(..)%'); do                         \
 228            for o in $(all-object-suffixes); do \
 229              $(open-check-inhibit-asm) \
 230              echo "\$$(objpfx)%$$o: $$dir/%.S \$$(before-compile); \
 231                   \$$(compile-command.S)";                                    \
 232              echo "\$$(objpfx)%$$o: $$dir/%.s \$$(before-compile); \
 233                   \$$(compile-command.s)";                                    \
 234              $(close-check-inhibit-asm) \
 235              echo "\$$(objpfx)%$$o: $$dir/%.c \$$(before-compile); \
 236                   \$$(compile-command.c)";                                    \
 237            done; \
 238            $(open-check-inhibit-asm) \
 239            echo "\$$(objpfx)%.d: $$dir/%.s \$$(common-objpfx)dummy.d; \
 240                 \$$(make-dummy-dep)";                          \
 241            echo "\$$(objpfx)%.d: $$dir/%.S \$$(before-compile); \
 242                 \$$(+make-deps)";                                             \
 243            $(close-check-inhibit-asm)   \
 244            echo "\$$(objpfx)%.d: $$dir/%.c \$$(before-compile); \
 245                 \$$(+make-deps)";                                             \
 246          done;                                                                \
 247          echo 'sysd-rules-done = t') > $@T
 248         mv -f $@T $@
 249
 250 ifndef sysd-rules-done
 251 # Don't do deps until this exists, because it provides rules to make the deps.
 252 no_deps=t
 253 endif
 254
 255 # Generate version maps, but wait until sysdep-subdirs is known
 256 ifeq ($(sysd-sorted-done),t)
 257 ifeq ($(versioning),yes)
 258 -include $(common-objpfx)sysd-versions
 259 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
 260 common-generated += $(version-maps)
 261 postclean-generated += sysd-versions Versions.all abi-versions.h
 262
 263 ifndef avoid-generated
 264 ifneq ($(sysd-versions-subdirs),$(all-subdirs) $(config-sysdirs))
 265 sysd-versions-force = FORCE
 266 FORCE:
 267 endif
 268 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
 269                               $(common-objpfx)soversions.i \
 270                               $(..)Versions.def \
 271                               $(wildcard $(add-ons:%=$(..)%/Versions.def))
 272         { while read lib version setname; do \
 273             test -z "$$setname" || echo "$$lib : $$setname"; \
 274           done < $(word 2,$^); \
 275           cat $(filter-out $< $(word 2,$^),$^) \
 276           | $(preprocess-versions); \
 277         } | LC_ALL=C $(AWK) -f $< > $@T
 278         mv -f $@T $@
 279 $(common-objpfx)sysd-versions: $(common-objpfx)Versions.all \
 280                                $(..)scripts/versions.awk \
 281                                $(wildcard $(all-subdirs:%=$(..)%/Versions)) \
 282                                $(wildcard $(sysdirs:%=%/Versions)) \
 283                                $(sysd-versions-force)
 284         ( echo 'sysd-versions-subdirs = $(all-subdirs) $(config-sysdirs)' ; \
 285           cat $(filter-out $< $(word 2,$^) $(sysd-versions-force),$^) \
 286           | $(preprocess-versions) \
 287           | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
 288                             -v move_if_change='$(move-if-change)' \
 289                             -f $(word 2,$^); \
 290         ) > $@T
 291         mv -f $@T $@
 292 endif # avoid-generated
 293 endif # $(versioning) = yes
 294 endif # sysd-sorted-done
 295
 296
 297 ifndef compile-command.S
 298 compile-command.S = $(compile.S) $(OUTPUT_OPTION)
 299 endif
 300 ifndef compile-command.s
 301 compile-command.s = $(COMPILE.s) $< $(OUTPUT_OPTION)
 302 endif
 303 ifndef compile-command.c
 304 compile-command.c = $(compile.c) $(OUTPUT_OPTION)
 305 endif
 306
 307 # GCC can grok options after the file name, and it looks nicer that way.
 308 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
 309 compile.S = \
 310   $(CC) $< -c $(CPPFLAGS) -DASSEMBLER $(asm-CPPFLAGS) $(ASFLAGS-$(suffix $@))
 311 COMPILE.S = \
 312   $(CC) -c $(CPPFLAGS) -DASSEMBLER $(asm-CPPFLAGS) $(ASFLAGS-$(suffix $@))
 313 COMPILE.s = $(filter-out -pipe,$(CC)) -c $(ASFLAGS)
 314
 315 # If we want to generate MD% checksums for the sources do this now.
 316 ifeq ($(md5),yes)
 317 generate-md5 = ; rm -f $(@:.d=.md5); \
 318 $(CC) -E $< $(CFLAGS) $(CPPFLAGS) $($(<:$*.%=%)-CPPFLAGS) | \
 319 sed '/^\#/d;/^[[:space:]]*$$/d' | md5sum > $(@:.d=.md5)
 320 else
 321 generate-md5 =
 322 endif
 323
 324 # We need this for the output to go in the right place.  It will default to
 325 # empty if make was configured to work with a cc that can't grok -c and -o
 326 # together.  You can't compile the C library with such a compiler.
 327 OUTPUT_OPTION = -o $@
 328
 329 S-CPPFLAGS = $(asm-CPPFLAGS)
 330 define +make-deps
 331 $(make-target-directory)
 332 -@rm -f $@
 333 $(+mkdep) $< $(CFLAGS) $(CPPFLAGS) $($(<:$*.%=%)-CPPFLAGS) | \
 334 sed \
 335 -e 's,$(subst .,\.,$*)\.o,$(foreach o,$(all-object-suffixes),$(@:.d=$o)) $@,' \
 336 $(sed-remove-objpfx) > $(@:.d=.T)
 337 mv -f $(@:.d=.T) $@ $(generate-md5)
 338 endef
 339 ifneq (,$(objpfx))
 340 # Continuation lines here are dangerous because they introduce spaces!
 341 define sed-remove-objpfx
 342 -e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
 343 -e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g'
 344 endef
 345 endif
 346 \f
 347 # Modify the list of routines we build for different targets
 348
 349 ifeq (yes,$(build-shared))
 350 ifndef libc.so-version
 351 # Undefine this because it can't work when we libc.so is unversioned.
 352 static-only-routines =
 353 endif
 354 endif
 355
 356 # Bounded pointer thunks are only built for *.ob
 357 elide-bp-thunks = $(addprefix $(bppfx),$(bp-thunks))
 358
 359 elide-routines.oS += $(filter-out $(static-only-routines),\
 360                                   $(routines) $(aux) $(sysdep_routines)) \
 361                      $(elide-bp-thunks)
 362 elide-routines.os += $(static-only-routines) $(elide-bp-thunks)
 363
 364 # If we have versioned code we don't need the old versions in any of the
 365 # static libraries.
 366 elide-routines.o  += $(shared-only-routines) $(elide-bp-thunks)
 367 elide-routines.op += $(shared-only-routines) $(elide-bp-thunks)
 368 elide-routines.og += $(shared-only-routines) $(elide-bp-thunks)
 369 elide-routines.ob += $(shared-only-routines)
 370 \f
 371 # Shared library building.
 372
 373 ifeq (yes,$(build-shared))
 374
 375 # Reference map file only when versioning is selected and a map file name
 376 # is given.
 377 ifeq ($(versioning),yes)
 378 map-file = $(firstword $($(@F:.so=-map)) \
 379                        $(addprefix $(common-objpfx), \
 380                                    $(filter $(@F:.so=.map),$(version-maps))))
 381 load-map-file = $(map-file:%=-Wl,--version-script=%)
 382 endif
 383
 384 # Pattern rule to build a shared object from an archive of PIC objects.
 385 # This must come after the installation rules so Make doesn't try to
 386 # build shared libraries in place from the installed *_pic.a files.
 387 # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
 388 # on other shared objects.
 389 lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(+interp)
 390         $(build-shlib)
 391
 392 define build-shlib-helper
 393 $(LINK.o) -shared -Wl,-O1 $(sysdep-LDFLAGS) $(config-LDFLAGS) \
 394           $(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \
 395           $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
 396           -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
 397           $(LDFLAGS.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
 398           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 399 endef
 400
 401 ifeq (yes,$(elf))
 402 # binutils only position loadable notes into the first page for binaries,
 403 # not for shared objects
 404 define build-shlib
 405 $(build-shlib-helper) \
 406           -o $@.new $(csu-objpfx)abi-note.o -Wl,--verbose \
 407           $(LDLIBS-$(@F:lib%.so=%).so) 2>&1 | \
 408           sed -e '/^=========/,/^=========/!d;/^=========/d' \
 409               -e 's/^.*\.hash[  ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 410           > $@.lds
 411 rm -f $@.new
 412 $(build-shlib-helper) -o $@ -T $@.lds \
 413           -Wl,--whole-archive $(csu-objpfx)abi-note.o \
 414           $(filter-out $(map-file) $(+preinit) $(+postinit),$^) \
 415           $(no-whole-archive) $(LDLIBS-$(@F:lib%.so=%).so)
 416 rm -f $@.lds
 417 endef
 418 else
 419 define build-shlib
 420 $(build-shlib-helper) \
 421           -o $@ -Wl,--whole-archive \
 422           $(filter-out $(map-file) $(+preinit) $(+postinit),$^) \
 423           $(no-whole-archive) $(LDLIBS-$(@F:lib%.so=%).so)
 424 endef
 425 endif
 426
 427 define build-module-helper
 428 $(LINK.o) -shared $(sysdep-LDFLAGS) $(config-LDFLAGS) \
 429           -B$(csu-objpfx) $(load-map-file) \
 430           $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
 431           -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
 432 endef
 433
 434 # This macro is similar to build-shlib but it does not define a soname
 435 # and it does not depend on the destination name to start with `lib'.
 436 ifeq (yes,$(elf))
 437 # binutils only position loadable notes into the first page for binaries,
 438 # not for shared objects
 439 define build-module
 440 $(build-module-helper) \
 441           -o $@.new $(csu-objpfx)abi-note.o -Wl,--verbose \
 442           $(LDLIBS-$(@F:lib%.so=%).so) 2>&1 | \
 443           sed -e '/^=========/,/^=========/!d;/^=========/d' \
 444               -e 's/^.*\.hash[  ]*:.*$$/  .note.ABI-tag : { *(.note.ABI-tag) } &/' \
 445           > $@.lds
 446 rm -f $@.new
 447 $(build-module-helper) -o $@ -T $@.lds \
 448           -Wl,--whole-archive $(csu-objpfx)abi-note.o \
 449           $(filter-out $(map-file) $(+preinit) $(+postinit),$^) \
 450           $(no-whole-archive) $(LDLIBS-$(@F:lib%.so=%).so)
 451 rm -f $@.lds
 452 endef
 453 else
 454 define build-module
 455 $(build-module-helper) \
 456           -o $@ -Wl,--whole-archive \
 457           $(filter-out $(map-file) $(+preinit) $(+postinit),$^) \
 458           $(no-whole-archive) $(LDLIBS-$(@F:%.so=%).so)
 459 endef
 460 endif
 461
 462 # Don't try to use -lc when making libc.so itself.
 463 # Also omits crti.o and crtn.o, which we do not want
 464 # since we define our own `.init' section specially.
 465 LDFLAGS-c.so = -nostdlib -nostartfiles
 466 # But we still want to link libc.so against $(gnulib).
 467 LDLIBS-c.so += $(gnulib)
 468 # Give libc.so an entry point and make it directly runnable itself.
 469 LDFLAGS-c.so += -e __libc_main
 470 # Force the backward compatibility EH functions to be linked.
 471 LDFLAGS-c.so += -u __register_frame
 472 # Pre-link the objects of libc_pic.a so that we can locally resolve
 473 # COMMON symbols before we link against ld.so.  This is because ld.so
 474 # contains some of libc_pic.a already, which will prevent the COMMONs
 475 # from being allocated in libc.so, which introduces evil dependencies
 476 # between libc.so and ld.so, which can make it impossible to upgrade.
 477 $(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
 478         $(LINK.o) -nostdlib -nostartfiles -r -o $@ \
 479         $(LDFLAGS-c_pic.os) -Wl,-d -Wl,--whole-archive $^
 480 # Use our own special initializer and finalizer files for libc.so.
 481 $(common-objpfx)libc.so: $(elfobjdir)/soinit.os \
 482                          $(common-objpfx)libc_pic.os \
 483                          $(elfobjdir)/sofini.os \
 484                          $(elfobjdir)/interp.os $(elfobjdir)/ld.so
 485         $(build-shlib)
 486 ifeq ($(versioning),yes)
 487 $(common-objpfx)libc.so: $(common-objpfx)libc.map
 488 endif
 489 common-generated += libc.so libc_pic.os
 490 ifdef libc.so-version
 491 $(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
 492         $(make-link)
 493 common-generated += libc.so$(libc.so-version)
 494 endif
 495 endif
 496 \f
 497 # Figure out the source filenames in this directory.
 498
 499 override sources := $(addsuffix .c,\
 500                         $(filter-out $(elided-routines),\
 501                             $(routines) $(aux) \
 502                             $(sysdep_routines)))
 503 sysdep_routines := $(sysdep_routines)
 504
 505 headers := $(headers) $(sysdep_headers)
 506
 507 # This is the list of all object files, gotten by
 508 # replacing every ".c" in `sources' with a ".o".
 509 # We also add bounded-pointer thunks, which are later
 510 # elided for all suffixes except for `.ob'.
 511 override objects := $(addprefix $(objpfx),$(sources:.c=.o) \
 512                       $(patsubst %,$(bppfx)%.o,\
 513                         $(filter $(routines) $(sysdep_routines),$(bp-thunks))))
 514
 515
 516 # The makefile may define $(extra-libs) with `libfoo libbar'
 517 # to build libfoo.a et al from the modules listed in $(libfoo-routines).
 518 ifdef extra-libs
 519 # extra-lib.mk is included once for each extra lib to define rules
 520 # to build it, and to add its objects to the various variables.
 521 # During its evaluation, $(lib) is set to the name of the library.
 522 extra-libs-left := $(extra-libs)
 523 include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
 524 endif
 525 \f
 526 +depfiles := $(sources:.c=.d) \
 527              $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \
 528              $(addsuffix .d,$(tests) $(test-srcs))
 529 ifeq ($(build-programs),yes)
 530 +depfiles += $(addsuffix .d,$(others) $(sysdep-others))
 531 endif
 532 +depfiles := $(addprefix $(objpfx),\
 533                          $(filter-out $(addsuffix .d,$(omit-deps)),\
 534                                       $(+depfiles)))
 535
 536 ifdef +depfiles
 537 ifneq ($(no_deps),t)
 538 -include $(+depfiles)
 539 endif
 540 endif
 541 \f\f
 542 # Maximize efficiency by minimizing the number of rules.
 543 .SUFFIXES:      # Clear the suffix list.  We don't use suffix rules.
 544 # Don't define any builtin rules.
 545 MAKEFLAGS := $(MAKEFLAGS)r
 546
 547 # Generic rule for making directories.
 548 %/:
 549 # mkdir isn't smart enough to strip a trailing /.
 550         mkdir $(@:%/=%)
 551 \f
 552 # Make sure that object files are not removed
 553 # when they are intermediates between sources and library members.
 554 .PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes))
 555
 556 # Make sure that the parent library archive is never removed.
 557 .PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 558 \f
 559 # Use the verbose option of ar and tar when not running silently.
 560 ifeq    "$(findstring s,$(MAKEFLAGS))" ""       # if not -s
 561 verbose := v
 562 else                                            # -s
 563 verbose :=
 564 endif                                           # not -s
 565
 566 ARFLAGS := r$(verbose)
 567 CREATE_ARFLAGS := cru$(verbose)
 568 \f
 569 # This makes all the object files in the parent library archive.
 570
 571 .PHONY: lib lib-noranlib
 572 lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 573 lib-noranlib: libobjs
 574
 575 # For object-suffix $o, the list of objects with that suffix.
 576 # Makefiles can define `elide-routines.so = foo' to leave foo.so out.
 577 o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
 578                                                        $(elide-routines$o)),\
 579                                             $(objects))) \
 580             $(addprefix $(objpfx),$(o-objects$o))
 581
 582 others: $(addprefix $(objpfx),$(install-lib))
 583
 584 ifndef objects
 585
 586 # Create the stamp$o files to keep the parent makefile happy.
 587 subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 588 $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o):
 589         $(make-target-directory)
 590         rm -f $@; > $@
 591 else
 592
 593 # Define explicit rules to update each $(objpfx)stamp.SUFFIX
 594 # timestamp file; these rules (one explicit rule is generated for each
 595 # object suffix) write a list of objects to update in the stamp file.
 596 # The parent will then actually add them all to the archive in the
 597 # archive rule, below.
 598 define o-iterator-doit
 599 $(objpfx)stamp$o: $(o-objects); $$(do-stamp)
 600 endef
 601 define do-stamp
 602 echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T
 603 mv -f $@T $@
 604 endef
 605 object-suffixes-left := $(object-suffixes-for-libc)
 606 include $(o-iterator)
 607
 608 endif
 609
 610 # Now define explicit rules to build the library archives; these depend
 611 # on the stamp files built above.
 612 define o-iterator-doit
 613 $(common-objpfx)$(patsubst %,$(libtype$o),c): \
 614                 $(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib)
 615 endef
 616 define do-makelib
 617 cd $(common-objdir) && \
 618 $(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)`
 619 $(RANLIB) $@
 620 endef
 621 subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%)
 622 subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
 623 ifndef subdir
 624 $(subdirs-stamps): subdir_lib;
 625 endif
 626 object-suffixes-left = $(object-suffixes-for-libc)
 627 include $(o-iterator)
 628
 629
 630 # This makes all the object files.
 631 .PHONY: objects objs libobjs extra-objs
 632 objects objs: libobjs extra-objs
 633 libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
 634 extra-objs: $(addprefix $(objpfx),$(extra-objs))
 635
 636 # Canned sequence for building an extra library archive.
 637 define build-extra-lib
 638 $(patsubst %/,cd % &&,$(objpfx)) \
 639 $(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \
 640       $(patsubst $(objpfx)%,%,$^)
 641 $(RANLIB) $@
 642 endef
 643 \f
 644 # Installation.
 645
 646 .PHONY: force-install
 647 force-install:
 648
 649 # $(install-lib) are installed from the object directory into $(libdir);
 650 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
 651 # unless they also appear in $(non-lib.a).  $(install-data) are installed
 652 # as they are into $(datadir).  $(headers) are installed as they are in
 653 # $(includedir).  $(install-bin) and $(install-sbin) are installed from the
 654 # object directory into $(bindir) and $(sbindir), respectively.
 655 # $(install-others) are absolute path names of files to install; rules to
 656 # install them are defined elsewhere.
 657
 658 # The simple library name to install libc.a under.
 659 # This could be defined by a sysdep Makefile.
 660 ifndef libc-name
 661 libc-name := c
 662 endif
 663
 664 define do-install
 665 $(make-target-directory)
 666 $(INSTALL_DATA) $< $@
 667 endef
 668
 669 # Make the target directory if it doesn't exist, using the `mkinstalldirs'
 670 # script that does `mkdir -p' even if `mkdir' doesn't support that flag.
 671 define make-target-directory
 672 $(addprefix $(..)./scripts/mkinstalldirs ,\
 673             $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
 674 endef
 675
 676 # Any directory (parent or subdir) should install libc.a; this way
 677 # "make install" in a subdir is guaranteed to install everything it changes.
 678 installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
 679                              $(inst_libdir)/$(patsubst %,$(libtype$o),\
 680                                                      $(libprefix)$(libc-name)))
 681 install: $(installed-libcs)
 682 $(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
 683         $(make-target-directory)
 684         $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
 685 # Running ranlib after installing makes the __.SYMDEF time stamp up to
 686 # date, which avoids messages from some linkers.
 687         $(RANLIB) $@
 688
 689 define do-install-program
 690 $(make-target-directory)
 691 $(INSTALL_PROGRAM) $< $@.new
 692 mv -f $@.new $@
 693 endef
 694
 695 install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
 696 install-lib := $(filter-out %.so %_pic.a,$(install-lib))
 697
 698 ifeq (yes,$(build-shared))
 699 # Find which .so's have versions.
 700 versioned := $(strip $(foreach so,$(install-lib.so),\
 701                                $(patsubst %,$(so),$($(so)-version))))
 702
 703 install-lib.so-versioned := $(filter $(versioned), $(install-lib.so))
 704 install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so))
 705
 706 install-lib-nosubdir: $(install-lib.so-versioned:%=$(inst_libdir)/%) \
 707                       $(install-lib.so-unversioned:%=$(inst_slibdir)/%)
 708
 709 # Install all the unversioned shared libraries.
 710 $(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \
 711     $(objpfx)%.so $(+force)
 712         $(do-install-program)
 713
 714 ifneq ($(findstring -s,$(LN_S)),)
 715 define make-link
 716 rm -f $@.new
 717 $(SHELL) $(..)scripts/rellns-sh $< $@.new
 718 mv -f $@.new $@
 719 endef
 720 else
 721 # If we have no symbolic links don't bother with rellns-sh.
 722 define make-link
 723 rm -f $@.new
 724 $(LN_S) $< $@.new
 725 mv -f $@.new $@
 726 endef
 727 endif
 728
 729 ifeq (yes,$(build-shared))
 730 ifeq (no,$(cross-compiling))
 731 symbolic-link-prog := $(common-objpfx)elf/sln
 732 symbolic-link-list := $(common-objpfx)elf/symlink.list
 733 define make-shlib-link
 734 echo $(<F) $@ >> $(symbolic-link-list)
 735 endef
 736 else # cross-compiling
 737 # We need a definition that can be used by elf/Makefile's install rules.
 738 symbolic-link-prog = $(LN_S)
 739 endif
 740 endif
 741 ifndef make-shlib-link
 742 define make-shlib-link
 743 rm -f $@
 744 $(LN_S) $(<F) $@
 745 endef
 746 endif
 747
 748 ifdef libc.so-version
 749 # For a library specified to be version N, install three files:
 750 # libc.so       ->      libc.so.N       (e.g. libc.so.6)
 751 # libc.so.6     ->      libc-VERSION.so (e.g. libc-1.10.so)
 752
 753 $(inst_slibdir)/libc.so$(libc.so-version): $(inst_slibdir)/libc-$(version).so \
 754                                            $(+force)
 755         $(make-shlib-link)
 756 $(inst_slibdir)/libc-$(version).so: $(common-objpfx)libc.so $(+force)
 757         $(do-install-program)
 758 install: $(inst_slibdir)/libc.so$(libc.so-version)
 759
 760 ifndef subdir
 761 # What we install as libc.so for programs to link against is in fact a
 762 # link script.  It contains references for the various libraries we need.
 763 # The libc.so object is not complete since some functions are only defined
 764 # in libc_nonshared.a.
 765 # We need to use absolute paths since otherwise local copies (if they exist)
 766 # of the files are taken by the linker.
 767 install: $(inst_libdir)/libc.so
 768 $(inst_libdir)/libc.so: $(common-objpfx)libc.so$(libc.so-version) \
 769                         $(inst_libdir)/$(patsubst %,$(libtype.oS),\
 770                                                   $(libprefix)$(libc-name)) \
 771                         $(+force)
 772         (echo '/* GNU ld script';\
 773          echo '   Use the shared library, but some functions are only in';\
 774          echo '   the static library, so try that secondarily.  */';\
 775          echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \
 776               '$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\
 777               ')' \
 778         ) > $@.new
 779         mv -f $@.new $@
 780
 781 endif
 782
 783 else
 784 install: $(inst_slibdir)/libc.so
 785 $(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force)
 786         $(do-install-program)
 787 endif
 788
 789 ifneq (,$(versioned))
 790 # Produce three sets of rules as above for all the smaller versioned libraries.
 791
 792 define o-iterator-doit
 793 $(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link)
 794 endef
 795 object-suffixes-left := $(versioned)
 796 include $(o-iterator)
 797
 798 # Make symlinks in the build directory, because the versioned names might
 799 # be referenced by a DT_NEEDED in another library.
 800 define o-iterator-doit
 801 $(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
 802 endef
 803 object-suffixes-left := $(versioned)
 804 include $(o-iterator)
 805
 806 generated += $(foreach o,$(versioned),$o$($o-version))
 807
 808 ifeq (,$($(subdir)-version))
 809 define o-iterator-doit
 810 $(inst_slibdir)/$o$($o-version): $(inst_slibdir)/$(o:.so=)-$(version).so \
 811                                  $(+force);
 812         $$(make-shlib-link)
 813 endef
 814 object-suffixes-left := $(versioned)
 815 include $(o-iterator)
 816
 817 define o-iterator-doit
 818 $(inst_slibdir)/$(o:.so=)-$(version).so: $(objpfx)$o $(+force);
 819         $$(do-install-program)
 820 endef
 821 object-suffixes-left := $(versioned)
 822 include $(o-iterator)
 823 else
 824 define o-iterator-doit
 825 $(inst_slibdir)/$o$($o-version): \
 826   $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so $(+force);
 827         $$(make-shlib-link)
 828 endef
 829 object-suffixes-left := $(versioned)
 830 include $(o-iterator)
 831
 832 define o-iterator-doit
 833 $(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so: $(objpfx)$o $(+force);
 834         $$(do-install-program)
 835 endef
 836 object-suffixes-left := $(versioned)
 837 include $(o-iterator)
 838 endif
 839 endif
 840
 841 define do-install-so
 842 $(do-install-program)
 843 $(patsubst %,ln -s -f $(@F) $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
 844            $(filter-out %.so,$@))
 845 endef
 846
 847 so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
 848 $(foreach v,$(so-versions),\
 849           $(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \
 850                                                $(+force)
 851         $(do-install-so)
 852 $(foreach v,$(so-versions),\
 853           $(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force)
 854         $(do-install-so)
 855 endif
 856
 857 ifdef install-bin
 858 $(addprefix $(inst_bindir)/,$(install-bin)): \
 859     $(inst_bindir)/%: $(objpfx)% $(+force)
 860         $(do-install-program)
 861 endif
 862 ifdef install-rootsbin
 863 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \
 864    $(inst_rootsbindir)/%: $(objpfx)% $(+force)
 865         $(do-install-program)
 866 endif
 867 ifdef install-sbin
 868 $(addprefix $(inst_sbindir)/,$(install-sbin)): \
 869     $(inst_sbindir)/%: $(objpfx)% $(+force)
 870         $(do-install-program)
 871 endif
 872 ifdef install-lib
 873 install-lib.a := $(filter lib%.a,$(install-lib))
 874 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
 875 ifdef install-lib-non.a
 876 $(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
 877   $(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force)
 878         $(do-install)
 879 endif
 880 ifdef install-lib.a
 881 $(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \
 882   $(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force)
 883         $(do-install)
 884         $(patsubst %,$(RANLIB) $@,$(filter-out $(non-lib.a),$(<F)))
 885 endif
 886 endif
 887 ifdef install-data
 888 $(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force)
 889         $(do-install)
 890 endif
 891 headers := $(strip $(headers))
 892 ifdef headers
 893 $(addprefix $(inst_includedir)/,$(headers)): $(inst_includedir)/%: % $(+force)
 894         $(do-install)
 895 endif   # headers
 896
 897 .PHONY: install-bin-nosubdir install-rootsbin-nosubdir install-sbin-nosubdir \
 898         install-lib-nosubdir install-data-nosubdir install-headers-nosubdir
 899 install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin))
 900 install-rootsbin-nosubdir: \
 901         $(addprefix $(inst_rootsbindir)/,$(install-rootsbin))
 902 install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin))
 903 install-lib-nosubdir: $(addprefix $(inst_libdir)/,\
 904                        $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
 905                        $(addprefix $(libprefix),$(install-lib-non.a)))
 906 install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data))
 907 install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers))
 908 install-others-nosubdir: $(install-others)
 909
 910 # We need all the `-nosubdir' targets so that `install' in the parent
 911 # doesn't depend on several things which each iterate over the subdirs.
 912 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
 913 # subroutine.  Then in the parent `install-FOO' also causes subdir makes.
 914 install-%:: install-%-nosubdir ;
 915
 916 .PHONY: install install-no-libc.a-nosubdir
 917 ifeq ($(build-programs),yes)
 918 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir\
 919                             install-bin-nosubdir install-lib-nosubdir   \
 920                             install-others-nosubdir install-rootsbin-nosubdir \
 921                             install-sbin-nosubdir
 922 else
 923 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir\
 924                             install-lib-nosubdir install-others-nosubdir
 925 endif
 926 install: install-no-libc.a-nosubdir
 927 \f
 928 # Command to compile $< in $(objdir) using the native libraries.
 929 define native-compile
 930 $(make-target-directory)
 931 $(patsubst %/,cd % &&,$(objpfx)) \
 932 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
 933             $(firstword $(filter /%,$< $(shell pwd)/$<)) -o $(@F)
 934 endef
 935
 936 # Command to compile $< in $(common-objdir) using the native libraries.
 937 # We must cd to $(objdir) anyway so that $(..)config.h is valid.
 938 define common-objdir-compile
 939 $(patsubst %/,cd % &&,$(objpfx)) \
 940 $(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
 941             $(firstword $(filter /%,$< $(shell pwd)/$<)) -o $(..)$(@F)
 942 endef
 943
 944 # We always want to use configuration definitions.
 945 # Note that this is only used for commands running in $(objpfx).
 946 ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) -include $(..)config.h
 947
 948 # Support the GNU standard name for this target.
 949 .PHONY: check
 950 check: tests
 951 \f
 952 .PHONY: TAGS
 953 TAGS: $(objpfx)distinfo $(..)MakeTAGS
 954         $(MAKE) $(addprefix -f ,$^) $@
 955
 956 $(..)po/%.pot: $(objpfx)distinfo $(..)MakeTAGS FORCE
 957         $(MAKE) $(addprefix -f ,$(filter-out FORCE,$^)) $@
 958 FORCE:
 959
 960
 961 .PHONY: echo-headers
 962 echo-headers:
 963         @echo $(headers)
 964
 965 \f
 966 # Common cleaning targets.
 967
 968 .PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean
 969 clean: common-clean
 970 mostlyclean: common-mostlyclean
 971
 972 do-tests-clean:
 973         -rm -f $(addprefix $(objpfx),$(addsuffix .out,$(tests) $(test-srcs)) \
 974                                      $(addsuffix -bp.out,$(tests) $(test-srcs)))
 975
 976 # Remove the object files.
 977 common-mostlyclean:
 978         -rm -f $(addprefix $(objpfx),$(tests) $(test-srcs) $(others) \
 979                                      $(sysdep-others) stubs \
 980                                      $(addsuffix .o,$(tests) $(test-srcs) \
 981                                                     $(others) \
 982                                                     $(sysdep-others)) \
 983                                      $(addsuffix -bp,$(tests) $(test-srcs)) \
 984                                      $(addsuffix .out,$(tests) $(test-srcs)) \
 985                                      $(addsuffix -bp.out,$(tests) $(test-srcs)))
 986         -rm -f $(addprefix $(objpfx),$(extra-objs) $(install-lib) \
 987                                      $(install-lib.so) \
 988                                      $(install-lib.so:%.so=%_pic.a))
 989         -rm -f core
 990         $(rmobjs)
 991 define rmobjs
 992 $(foreach o,$(object-suffixes-for-libc),
 993 -rm -f $(objpfx)stamp$o $(o-objects))
 994 endef
 995
 996 # Also remove the dependencies and generated source files.
 997 common-clean: common-mostlyclean
 998         -rm -f $(addprefix $(objpfx),$(generated)) $(+depfiles)
 999         -rm -fr $(addprefix $(objpfx),$(generated-dirs))
1000         -rm -f $(addprefix $(common-objpfx),$(common-generated))
1001         -rm -f $(objpfx)distinfo
1002 \f
1003 # Produce a file `stubs' which contains `#define __stub_FUNCTION'
1004 # for each function which is a stub.  We grovel over all the .d files
1005 # looking for references to <stub-tag.h>.  Then we grovel over each
1006 # referenced source file to see what stub function it defines.
1007
1008 ifdef objpfx
1009 .PHONY: stubs # The parent Makefile calls this target.
1010 stubs: $(objpfx)stubs
1011 endif
1012 s = $(sysdep_dir)/generic
1013 $(objpfx)stubs: $(+depfiles)
1014 # Use /dev/null since `...` might expand to empty.
1015         (s=`cd $s && $(PWD_P)`; \
1016          $(patsubst %/,cd % &&,$(objpfx)) \
1017          sed -n 's/^stub_warning *(\([^)]*\).*$$/#define __stub_\1/p' \
1018           `sed -n -e '\@ $s/[^ ]*\.c@{; s@^.* $s/\([^ ]*\.c\).*$$@'"$$s"'/\1@; h; }' \
1019                 -e '/stub-tag\.h/{; g; p; }' \
1020                   $(patsubst $(objpfx)%,%,$^) /dev/null` \
1021              /dev/null) > $@T
1022         mv -f $@T $@
1023 \f
1024 # Make the distribution tar file.
1025
1026 .PHONY: dist
1027 dist: $(objpfx)distinfo $(..)Make-dist
1028         $(MAKE) -f $< -f $(word 2,$^) $(Make-dist-args)
1029
1030 # Avoid depending on source files found in sysdeps dirs,
1031 # because the references affect implicit rule selection.
1032 dist: $(filter-out %.c %.S %.s,$(distribute))
1033
1034 # We used to simply export all these variables, but that frequently made the
1035 # environment get too large.  Instead, we write all the information into
1036 # a generated makefile fragment `distinfo', and then include it with -f in
1037 # the sub-make that makes the distribution (above).
1038 $(objpfx)distinfo: Makefile $(..)Makerules \
1039                    $(wildcard $(foreach dir,$(sysdirs),$(dir)/Makefile))
1040         $(make-target-directory)
1041         $(distinfo-vars)
1042         mv -f $@.new $@
1043 .PHONY: subdir_distinfo
1044 subdir_distinfo: $(objpfx)distinfo
1045
1046 define distinfo-vars
1047 rm -f $@.new
1048 echo > $@.new 'subdir := $(subdir)'
1049 $(foreach var,subdir-dirs sources elided-routines sysdep_routines \
1050               headers sysdep_headers distribute dont_distribute generated \
1051               others tests test-srcs extra-libs $(extra-libs:%=%-routines) \
1052               versioned \
1053               $(addprefix install-,lib lib.so data bin sbin others),
1054 echo >> $@.new '$(subdir)-$(var) := $($(var))'
1055 echo >> $@.new '$(var) = $$($(subdir)-$(var))')
1056 endef
1057 \f
1058 ifneq (,$(strip $(gpl2lgpl)))
1059 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
1060 # Snarf from the master source and frob the copying notice.
1061 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
1062         sed -f $^ > $@-tmp
1063 # So I don't edit them by mistake.
1064         chmod a-w $@-tmp
1065         mv -f $@-tmp $@
1066 ifeq ($(with-cvs),yes)
1067         test ! -d CVS || cvs $(CVSOPTS) commit -m'Updated from $^' $@
1068 endif
1069 endif
1070 endif