Makerules

   1 # Copyright (C) 1991, 1992, 1993, 1994, 1995 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
  16 # not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 # Cambridge, MA 02139, 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
  29 ifdef   subdir
  30 ..      := ../
  31 endif   # subdir
  32
  33 # If `sources' was defined by the parent makefile, undefine it so
  34 # we will later get it from wildcard search in this directory.
  35 ifneq   "$(findstring env,$(origin sources))" ""
  36 sources :=
  37 endif
  38
  39 headers := $(headers) $(sysdep_headers)
  40
  41 oPATH := $(PATH)
  42 PATH := this definition should take precedence over $(oPATH)
  43 ifeq ($(PATH),$(oPATH))
  44 You must not use the -e flag when building the GNU C library.
  45 else
  46 PATH := $(oPATH)
  47 endif
  48 \f
  49 ifndef +included-Makeconfig
  50 include $(..)Makeconfig
  51 endif
  52
  53 # `configure' writes a definition of `config-sysdirs' in `config.make'.
  54 sysdirs = $(config-sysdirs)
  55
  56 +sysdir_pfx = $(common-objpfx)
  57
  58 export sysdirs := $(sysdirs)
  59
  60 +sysdep_dirs := $(addprefix $(sysdep_dir)/,$(sysdirs))
  61 ifdef objdir
  62 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
  63 endif
  64
  65 # Add -I switches to get the right sysdep directories.
  66 # `+includes' in Makeconfig references $(+sysdep-includes).
  67 +sysdep-includes := $(addprefix -I,$(+sysdep_dirs))
  68 \f
  69 # Include any system-specific makefiles.
  70
  71 # This is here so things in sysdep Makefiles can easily depend on foo.h as
  72 # appropriate and not worry about where foo.h comes from, which may be
  73 # system dependent and not known by that Makefile.
  74 vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) \
  75                                       $(addprefix $(sysdep_dir)/,$(sysdirs)) \
  76                                       $(..)))
  77
  78 ifeq ($(wildcard $(+sysdir_pfx)sysd-Makefile),)
  79 # Don't do deps until this exists, because it might change the sources list.
  80 no_deps=t
  81 endif
  82
  83 # Some sysdep makefiles use this to distinguish being included here from
  84 # being included individually by a subdir makefile (hurd/Makefile needs this).
  85 in-Makerules := yes
  86
  87 ifndef avoid-generated
  88 include $(+sysdir_pfx)sysd-Makefile
  89 $(+sysdir_pfx)sysd-Makefile: $(+sysdir_pfx)config.make $(..)Makerules
  90         -@rm -f $@T
  91         (for dir in $(sysdirs); do                                            \
  92            file=sysdeps/$$dir/Makefile;                                       \
  93            if [ -f $(..)$$file ]; then                                        \
  94              echo include "\$$(..)$$file";                                    \
  95            else true; fi;                                                     \
  96          done; \
  97          echo 'sysd-Makefile-done=t') > $@T
  98         mv -f $@T $@
  99 endif
 100
 101 # Reorder before-compile so that mach things come first, and hurd things
 102 # second, before all else.  The mach and hurd subdirectories have many
 103 # generated header files which the much of rest of the library depends on,
 104 # so it is best to build them first (and mach before hurd, at that).
 105 before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\
 106                            $(before-compile)) \
 107                   $(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
 108                                $(before-compile))
 109
 110 # Remove existing files from `before-compile'.  Things are added there when
 111 # they must exist for dependency generation to work right, but once they
 112 # exist there is no further need for every single file to depend on them,
 113 # and those gratuitous dependencies result in many gratuitous
 114 # recompilations.
 115 before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
 116
 117 # Don't let any before-compile file be an intermediate and get removed.
 118 ifdef before-compile
 119 $(before-compile):
 120 endif
 121 \f
 122 # Generate an ordered list of implicit rules which find the source files in
 123 # each sysdep directory.  The old method was to use vpath to search all the
 124 # sysdep directories.  However, that had the problem that a .S file in a
 125 # later directory would be chosen over a .c file in an earlier directory,
 126 # which does not preserve the desired sysdeps ordering behavior.
 127
 128 # When making the list of .d files to include, we can't know which ones
 129 # have source in .s files, and thus do not in fact need a .d file.
 130 # So we must define rules to make .d files for .s files.
 131 define make-dummy-dep
 132 $(addprefix ln $(objpfx)dummy.d ,$(filter-out $(wildcard $@),$@))
 133 endef
 134 $(objpfx)dummy.d:
 135         echo '# .s files cannot contain includes, so they need no deps.' > $@
 136
 137 # It matters that this set of rules, for compiling from sources in
 138 # the current directory (the $srcdir/$subdir) come before the
 139 # generated sysdep rules in included from sysd-rules below.  When
 140 # compiling in the source tree, generated sources go into the current
 141 # directory, and those should be chosen before any sources in sysdeps.
 142 $(objpfx)%.o: %.S $(before-compile); $(compile-command.S)
 143 $(objpfx)%.d: %.S $(before-compile); $(+make-deps)
 144 $(objpfx)%.o: %.s $(before-compile); $(compile-command.s)
 145 $(objpfx)%.d: %.s $(objpfx)dummy.d; $(make-dummy-dep)
 146 $(objpfx)%.o: %.c $(before-compile); $(compile-command.c)
 147 $(objpfx)%.d: %.c $(before-compile); $(+make-deps)
 148
 149 # Omit the objpfx rules when building in the source tree, because
 150 # objpfx is empty and so these rules just override the ones above.
 151 ifdef objpfx
 152 # Define first rules to find the source files in $(objpfx).
 153 # Generated source files will end up there.
 154 $(objpfx)%.o: $(objpfx)%.S $(before-compile); $(compile-command.S)
 155 $(objpfx)%.d: $(objpfx)%.S $(before-compile); $(+make-deps)
 156 $(objpfx)%.o: $(objpfx)%.s $(before-compile); $(compile-command.s)
 157 $(objpfx)%.d: $(objpfx)%.s $(objpfx)dummy.d; $(make-dummy-dep)
 158 $(objpfx)%.o: $(objpfx)%.c $(before-compile); $(compile-command.c)
 159 $(objpfx)%.d: $(objpfx)%.c $(before-compile); $(+make-deps)
 160 endif
 161
 162 # System-dependent makefiles can put in `inhibit-sysdep-asm' wildcard
 163 # patterns matching sysdep directories whose assembly source files should
 164 # be suppressed.
 165 ifdef inhibit-sysdep-asm
 166 define open-check-inhibit-asm
 167 case $$sysdir in $(subst $(empty) ,|,$(inhibit-sysdep-asm))) : ;; *)
 168 endef
 169 close-check-inhibit-asm = ;; esac
 170 endif
 171
 172 # Don't include sysd-rules until sysd-Makefile is already there and has been
 173 # included.  It might define inhibit-sysdep-asm, which would affect the
 174 # contents of sysd-rules.
 175 ifdef sysd-Makefile-done
 176 include $(+sysdir_pfx)sysd-rules
 177 endif
 178 $(+sysdir_pfx)sysd-rules: $(+sysdir_pfx)config.make $(..)Makerules \
 179                           $(wildcard $(foreach dir,$(sysdirs),\
 180                                                $(sysdep_dir)/$(dir)/Makefile))
 181         -@rm -f $@T
 182         (for sysdir in $(sysdirs); do                                         \
 183            dir="\$$(sysdep_dir)/$$sysdir";                                    \
 184            $(open-check-inhibit-asm) \
 185            echo "\$$(objpfx)%.o: $$dir/%.S \$$(before-compile); \
 186                 \$$(compile-command.S)";                                      \
 187            echo "\$$(objpfx)%.d: $$dir/%.S \$$(before-compile); \
 188                 \$$(+make-deps)";                                             \
 189            echo "\$$(objpfx)%.o: $$dir/%.s \$$(before-compile); \
 190                 \$$(compile-command.s)";                                      \
 191            echo "\$$(objpfx)%.d: $$dir/%.s \$$(objpfx)dummy.d; \
 192                 \$$(make-dummy-dep)" $(close-check-inhibit-asm);        \
 193            echo "\$$(objpfx)%.o: $$dir/%.c \$$(before-compile); \
 194                 \$$(compile-command.c)";                                      \
 195            echo "\$$(objpfx)%.d: $$dir/%.c \$$(before-compile); \
 196                 \$$(+make-deps)";                                             \
 197          done) > $@T
 198         mv -f $@T $@
 199
 200 ifndef compile-command.S
 201 compile-command.S = $(compile.S) $(OUTPUT_OPTION)
 202 endif
 203 ifndef compile-command.s
 204 compile-command.s = $(COMPILE.s) $< $(OUTPUT_OPTION)
 205 endif
 206 ifndef compile-command.c
 207 compile-command.c = $(compile.c) $(OUTPUT_OPTION)
 208 endif
 209
 210 ifneq ($(filter %gcc,$(notdir $(firstword $(CC)))),)
 211 # GCC can grok options after the file name, and it looks nicer that way.
 212 compile.S = $(CC) $< -c $(CPPFLAGS) -DASSEMBLER $(asm-CPPFLAGS)
 213 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
 214 else
 215 compile.S = $(COMPILE.S) -DASSEMBLER $(asm-CPPFLAGS) $<
 216 compile.c = $(COMPILE.c) $<
 217 endif
 218
 219 ifndef OUTPUT_OPTION
 220 ifdef objpfx
 221 # We need this for the output to go in the right place.  It will default to
 222 # empty if make was configured to work with a cc that can't grok -c and -o
 223 # together.  You can't compile the C library with such a compiler.
 224 OUTPUT_OPTION = -o $@
 225 endif
 226 endif
 227
 228 S-CPPFLAGS = $(asm-CPPFLAGS)
 229 define +make-deps
 230 -@rm -f $@
 231 $(+mkdep) $< $(CPPFLAGS) $($(<:$*.%=%)-CPPFLAGS) | \
 232 sed -e 's,$*\.o,$(@:.d=.o) $@,' $(sed-remove-objpfx) > $(@:.d=.T)
 233 mv -f $(@:.d=.T) $@
 234 endef
 235 ifneq (,$(objpfx))
 236 sed-remove-objpfx = -e 's@ $(subst @,\@,$(objpfx))@ $$(objpfx)@g' \
 237                     -e 's@^$(subst @,\@,$(objpfx))@$$(objpfx)@g'
 238 endif
 239 \f
 240 # Figure out the source filenames in this directory.
 241
 242 override sources        := $(addsuffix .c,$(filter-out $(elided-routines),\
 243                                                        $(routines) $(aux) \
 244                                                        $(sysdep_routines)))
 245 sysdep_routines := $(sysdep_routines)
 246
 247 # This is the list of all object files, gotten by
 248 # replacing every ".c" in `sources' with a ".o".
 249 override objects        := $(addprefix $(objpfx),$(sources:.c=.o))
 250 \f
 251 +depfiles := $(strip $(sources:.c=.d) \
 252                      $(patsubst %.o,%.d,$(filter %.o,$(extra-objs))) \
 253                      $(addsuffix .d,$(others) $(tests)))
 254 +depfiles := $(addprefix $(objpfx),\
 255                          $(filter-out $(addsuffix .d,$(omit-deps)),\
 256                                       $(+depfiles)))
 257
 258 $(objpfx)depend-$(subdir): Makefile
 259 ifdef +depfiles
 260         for file in $(+depfiles:$(objpfx)%=%); do \
 261           echo "include \$$(objpfx)$$file";     \
 262         done > $@-tmp
 263         mv -f $@-tmp $@
 264 else
 265         cp /dev/null $@
 266 endif
 267
 268 ifneq ($(no_deps),t)
 269 # Include the generated dependencies of the sources in this directory.
 270 include $(objpfx)depend-$(subdir)
 271 endif
 272 \f\f
 273 # Maximize efficiency by minimizing the number of rules.
 274 .SUFFIXES:      # Clear the suffix list.
 275 # Add the suffixes we use.
 276 .SUFFIXES: .a .o .S .s .c .h .d
 277
 278 # Generic rule for making directories.
 279 %/:
 280 # mkdir isn't smart enough to strip a trailing /.
 281         mkdir $(@:%/=%)
 282 \f
 283 # Make sure that object files are not removed
 284 # when they are intermediates between sources and library members.
 285 # This can go away with make v4.
 286 .PRECIOUS: %.o
 287
 288 # Make sure that the parent library archive is never removed.
 289 .PRECIOUS: $(libc.a)
 290 \f
 291 # Use the verbose option of ar and tar when not running silently.
 292 ifeq    "$(findstring s,$(MAKEFLAGS))" ""       # if not -s
 293 verbose := v
 294 else                                            # -s
 295 verbose :=
 296 endif                                           # not -s
 297
 298 ARFLAGS := r$(verbose)
 299 \f
 300 # This makes all the object files in the parent library archive.
 301
 302 .PHONY: lib libobjs lib-noranlib
 303 $(libc.a): $(libc.a)(__.SYMDEF)
 304 lib: $(libc.a)
 305
 306 +libobjs := $(patsubst %,$(libc.a)(%),$(notdir $(objects)))
 307 libobjs: $(+libobjs)
 308 lib-noranlib: libobjs
 309
 310 # Define a pattern rule that will match many targets libc.%(foo.o), for
 311 # each foo in $(objects) (% will just happen always to match `a').  This is
 312 # the only way to define a rule that updates many targets at once with one
 313 # sequence of commands.
 314 ifdef objects
 315 $(patsubst %,$(libc.a:a=)\%(%),$(notdir $(objects))): $(objpfx)stamp-$(subdir);
 316 $(objpfx)stamp-$(subdir): $(objects)
 317 #       $(+libc_lock_open)
 318 ifdef objdir
 319         cd $(objdir); $(AR) cru$(verbose) libc.a $(patsubst $(objpfx)%,%,$^)
 320 else
 321         $(AR) cru$(verbose) $(..)libc.a $^
 322 endif
 323 #       $(+libc_lock_close)
 324         touch $@
 325 endif
 326
 327 $(libc.a)(__.SYMDEF): $(+libobjs)
 328         $(RANLIB) $@
 329
 330 define +libc_lock_open
 331 @. $(..)libc-lock-open
 332 endef
 333 define +libc_lock_close
 334 @rm -f $(..)LOCK-libc.a
 335 endef
 336
 337 # This makes all the object files.
 338 .PHONY: objects objs
 339 objects objs: $(objects) $(addprefix $(objpfx),$(extra-objs))
 340 \f
 341 # Installation.
 342
 343 # $(install-lib) are installed from the object directory into $(libdir);
 344 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
 345 # unless they also appear in $(non-lib.a).  $(install-data) are installed
 346 # as they are into $(datadir).  $(headers) are installed as they are in
 347 # $(includedir).  $(install-bin) and $(install-sbin) are installed from the
 348 # object directory into $(bindir) and $(sbindir), respectively.
 349 # $(install-others) are absolute path names of files to install; rules to
 350 # install them are defined elsewhere.
 351
 352 # The simple library name to install libc.a under.
 353 # This could be defined by a sysdep Makefile.
 354 ifndef libc-name
 355 libc-name := c
 356 endif
 357
 358 define do-install
 359 $(make-target-directory)
 360 $(INSTALL_DATA) $< $@
 361 endef
 362
 363 # Make the target directory if it doesn't exist.  Because of make's
 364 # directory cache, this will produce the `mkdir' command when the directory
 365 # already exists, if it didn't exist at the start of the `make' run.  The
 366 # `-' prefix ignores errors from mkdir, so there will just be some
 367 # gratuitous but harmless `File exists' messages.
 368 define make-target-directory
 369 $(addprefix -mkdir ,$(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
 370 endef
 371
 372 # Any directory (parent or subdir) that has any object files to build
 373 # should install libc.a; this way "make install" in a subdir is guaranteed
 374 # to install everything it changes.
 375 ifdef objects
 376 install: $(libdir)/lib$(libprefix)$(libc-name).a
 377 # We avoid depending on lib-noranlib because that makes the parent make
 378 # subdir_lib in all the subdirs, when the make install run they do will
 379 # update the library anyway.  Running ranlib after installing makes the
 380 # __.SYMDEF time stamp up to date, which avoids messages from some linkers.
 381 # Depending on subdir_install gets all the subdirs to update the library,
 382 # and is optimal for `make install' at top level.
 383 $(libdir)/lib$(libprefix)$(libc-name).a: libobjs subdir_install
 384         $(make-target-directory)
 385         $(INSTALL_DATA) $(libc.a) $@
 386         $(RANLIB) $@
 387 endif
 388
 389 ifdef install-bin
 390 $(addprefix $(bindir)/,$(install-bin)): $(bindir)/%: $(objpfx)%
 391         $(make-target-directory)
 392         $(INSTALL_PROGRAM) $< $@
 393 endif
 394 ifdef install-sbin
 395 $(addprefix $(sbindir)/,$(install-sbin)): $(sbindir)/%: $(objpfx)%
 396         $(make-target-directory)
 397         $(INSTALL_PROGRAM) $< $@
 398 endif
 399 ifdef install-lib
 400 install-lib.a := $(filter lib%.a,$(install-lib))
 401 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
 402 ifdef install-lib-non.a
 403 $(addprefix $(libdir)/$(libprefix),$(install-lib-non.a)): \
 404   $(libdir)/$(libprefix)%: $(objpfx)%
 405         $(do-install)
 406 endif
 407 ifdef install-lib.a
 408 $(install-lib.a:lib%.a=$(libdir)/lib$(libprefix)%.a): \
 409   $(libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a
 410         $(do-install)
 411         $(patsubst %,$(RANLIB) $@,$(filter-out $(non-lib.a),$(<F)))
 412 endif
 413 endif
 414 ifdef install-data
 415 $(addprefix $(datadir)/,$(install-data)): $(datadir)/%: %;$(do-install)
 416 endif
 417 headers := $(strip $(headers))
 418 ifdef headers
 419 $(addprefix $(includedir)/,$(headers)): \
 420         $(includedir)/%: %;$(do-install)
 421 endif   # headers
 422
 423 .PHONY: install-bin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
 424         install-data-nosubdir install-headers-nosubdir
 425 install-bin-nosubdir: $(addprefix $(bindir)/,$(install-bin))
 426 install-sbin-nosubdir: $(addprefix $(sbindir)/,$(install-sbin))
 427 install-lib-nosubdir: $(addprefix $(libdir)/,\
 428                        $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
 429                        $(addprefix $(libprefix),$(install-lib-non.a)))
 430 install-data-nosubdir: $(addprefix $(datadir)/,$(install-data))
 431 install-headers-nosubdir: $(addprefix $(includedir)/,$(headers))
 432 install-others-nosubdir: $(install-others)
 433
 434 # We need all the `-nosubdir' targets so that `install' in the parent
 435 # doesn't depend on several things which each iterate over the subdirs.
 436 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
 437 # subroutine.  Then in the parent `install-FOO' also causes subdir makes.
 438 install-%:: install-%-nosubdir ;
 439
 440 .PHONY: install install-no-libc.a-nosubdir
 441 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir\
 442                             install-bin-nosubdir install-lib-nosubdir   \
 443                             install-others-nosubdir install-sbin-nosubdir
 444 install: install-no-libc.a-nosubdir
 445 \f
 446 # Command to compile $< in $(objdir) using the native libraries.
 447 define native-compile
 448 cwd=`pwd`; cd $(@D); $(BUILD_CC) $(BUILD_CFLAGS) \
 449            $(addprefix $$cwd/,$^) -o $(@F)
 450 endef
 451
 452 # Command to compile $< in $(common-objdir) using the native libraries.
 453 define common-objdir-compile
 454 cd $(@D); $(BUILD_CC) $(BUILD_CFLAGS) $(<:$(common-objpfx)%=%) -o $(@F)
 455 endef
 456
 457 # We always want to use configuration definitions.
 458 BUILD_CFLAGS = -include $(common-objpfx)config.h
 459
 460 # Support the GNU standard name for this target.
 461 .PHONY: check
 462 check: tests
 463 \f
 464 .PHONY: TAGS
 465 TAGS: distinfo $(..)MakeTAGS
 466         $(MAKE) $(addprefix -f ,$^)
 467
 468 .PHONY: echo-headers
 469 echo-headers:
 470         @echo $(headers)
 471
 472 \f
 473 # Common cleaning targets.
 474
 475 .PHONY: common-mostlyclean common-clean mostlyclean clean
 476 clean: common-clean
 477 mostlyclean: common-mostlyclean
 478
 479 # Remove the object files.
 480 common-mostlyclean:
 481         -rm -f $(addprefix $(objpfx),$(tests) $(others) \
 482                                      $(addsuffix .o,$(tests) $(others)) \
 483                                      $(addsuffix .out,$(tests)))
 484         -rm -f $(objects) $(addprefix $(objpfx),$(extra-objs) stamp-$(subdir))
 485         -rm -f core TAGS
 486
 487 # Also remove the dependencies and generated source files.
 488 common-clean: common-mostlyclean
 489         -rm -f $(objpfx)depend-$(subdir) $(+depfiles)
 490         -rm -f $(addprefix $(objpfx),$(generated))
 491 \f
 492 # Produce a file `stub-$(subdir)' which contains `#define __stub_FUNCTION'
 493 # for each function which is a stub.  We grovel over all the .d files
 494 # looking for references to source files in sysdeps/stub.  Then we grovel
 495 # over each referenced source file to see what stub function it defines.
 496
 497 .PHONY: stubs # The parent Makefile calls this target.
 498 stubs: $(common-objpfx)stub-$(subdir)
 499 s = $(sysdep_dir)/stub
 500 $(common-objpfx)stub-$(subdir): $(+depfiles)
 501 # Use /dev/null since `...` might expand to empty.
 502         s=`cd $s; /bin/pwd`; \
 503         $(patsubst %,cd %;,$(objdir)) \
 504         sed -n 's/^stub_warning *(\([^)]*\).*$$/#define __stub_\1/p' \
 505             `sed -n 's@^.*$s/\([a-z0-9_-]*\.c\).*$$@'"$$s"/'\1@p' \
 506                  $(patsubst $(objpfx)%,%,$^) /dev/null` \
 507             /dev/null > $@T
 508         mv -f $@T $@
 509 \f
 510 # Make the distribution tar file.
 511
 512 .PHONY: dist
 513 dist: distinfo $(..)Make-dist
 514         $(MAKE) -f $< -f $(word 2,$^) $(Make-dist-args)
 515
 516 dist: $(distribute)
 517
 518 # We used to simply export all these variables, but that frequently made the
 519 # environment get too large.  Instead, we write all the information into
 520 # a generated makefile fragment `distinfo', and then include it with -f in
 521 # the sub-make that makes the distribution (above).
 522 distinfo: Makefile $(..)Makerules
 523         $(distinfo-vars)
 524         mv -f $@.new $@
 525
 526 define distinfo-vars
 527 rm -f $@.new
 528 $(foreach var,subdir sources elided-routines headers distribute \
 529               dont_distribute generated others tests,
 530 echo >> $@.new '$(var)  := $($(var))')
 531 echo >> $@.new 'sources := $$(sources) $$(addsuffix .c,$$(elided-routines))'
 532 endef
 533 \f
 534 ifneq (,$(strip $(gpl2lgpl)))
 535 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
 536 # Snarf from the master source and frob the copying notice.
 537 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
 538         sed -f $^ > $@-tmp
 539 # So I don't edit them by mistake.
 540         chmod a-w $@-tmp
 541         mv -f $@-tmp $@
 542         test -d CVS && cvs commit -m'Updated from $^' $@
 543 endif
 544 endif