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