Makerules

   1 # Copyright (C) 1991, 92, 93, 94, 95, 96 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 oPATH := $(PATH)
  40 PATH := this definition should take precedence over $(oPATH)
  41 ifeq ($(PATH),$(oPATH))
  42 You must not use the -e flag when building the GNU C library.
  43 else
  44 PATH := $(oPATH)
  45 endif
  46 \f
  47 ifndef +included-Makeconfig
  48 include $(..)Makeconfig
  49 endif
  50
  51 # `configure' writes a definition of `config-sysdirs' in `config.make'.
  52 sysdirs = $(config-sysdirs)
  53
  54 +sysdir_pfx = $(common-objpfx)
  55
  56 export sysdirs := $(sysdirs)
  57
  58 +sysdep_dirs := $(addprefix $(sysdep_dir)/,$(sysdirs))
  59 ifdef objdir
  60 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
  61 endif
  62
  63 # Add -I switches to get the right sysdep directories.
  64 # `+includes' in Makeconfig references $(+sysdep-includes).
  65 +sysdep-includes := $(addprefix -I,$(+sysdep_dirs))
  66
  67 # The name of the symbol table archive member.  The default is suitable for
  68 # BSD style archives.  It can be overridden in sysdep Makefiles when SYSV
  69 # style archive are used.
  70 ifeq (no,$(elf))
  71 ar-symtab-name = __.SYMDEF
  72 else
  73 ar-symtab-name = # The null name is used in ELF archives.
  74 endif
  75 \f
  76 # Include any system-specific makefiles.
  77
  78 # This is here so things in sysdep Makefiles can easily depend on foo.h as
  79 # appropriate and not worry about where foo.h comes from, which may be
  80 # system dependent and not known by that Makefile.
  81 vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) \
  82                                       $(addprefix $(sysdep_dir)/,$(sysdirs)) \
  83                                       $(..)))
  84
  85 # Some sysdep makefiles use this to distinguish being included here from
  86 # being included individually by a subdir makefile (hurd/Makefile needs this).
  87 in-Makerules := yes
  88
  89 ifndef avoid-generated
  90 -include $(+sysdir_pfx)sysd-Makefile
  91 ifneq ($(sysd-Makefile-sysdirs),$(sysdirs))
  92 sysd-Makefile-force = FORCE
  93 FORCE:
  94 endif
  95 $(+sysdir_pfx)sysd-Makefile: $(+sysdir_pfx)config.make $(..)Makerules \
  96                              $(sysd-Makefile-force)
  97         -@rm -f $@T
  98         (echo 'sysd-Makefile-sysdirs := $(sysdirs)';                          \
  99          for dir in $(sysdirs); do                                            \
 100            file=sysdeps/$$dir/Makefile;                                       \
 101            if [ -f $(..)$$file ]; then                                        \
 102              echo include "\$$(..)$$file";                                    \
 103            else true; fi;                                                     \
 104          done; \
 105          echo 'sysd-Makefile-done=t') > $@T
 106         mv -f $@T $@
 107 endif
 108
 109 ifndef sysd-Makefile-done
 110 # Don't do deps until this exists, because it might change the sources list.
 111 no_deps=t
 112 endif
 113
 114
 115 # Reorder before-compile so that mach things come first, and hurd things
 116 # second, before all else.  The mach and hurd subdirectories have many
 117 # generated header files which the much of rest of the library depends on,
 118 # so it is best to build them first (and mach before hurd, at that).
 119 before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\
 120                            $(before-compile)) \
 121                   $(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
 122                                $(before-compile))
 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 $(objpfx)dummy.d ,$(filter-out $(wildcard $@),$@))
 147 endef
 148 $(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 $(objpfx)%.o: %.S $(before-compile); $(compile-command.S)
 157 $(objpfx)%.so: %.S $(before-compile); $(compile-command.S)
 158 $(objpfx)%.po: %.S $(before-compile); $(compile-command.S)
 159 $(objpfx)%.go: %.S $(before-compile); $(compile-command.S)
 160 $(objpfx)%.d: %.S $(before-compile); $(+make-deps)
 161 $(objpfx)%.o: %.s $(before-compile); $(compile-command.s)
 162 $(objpfx)%.so: %.s $(before-compile); $(compile-command.s)
 163 $(objpfx)%.po: %.s $(before-compile); $(compile-command.s)
 164 $(objpfx)%.go: %.s $(before-compile); $(compile-command.s)
 165 $(objpfx)%.d: %.s $(objpfx)dummy.d; $(make-dummy-dep)
 166 $(objpfx)%.o: %.c $(before-compile); $(compile-command.c)
 167 $(objpfx)%.so: %.c $(before-compile); $(compile-command.c)
 168 $(objpfx)%.po: %.c $(before-compile); $(compile-command.c)
 169 $(objpfx)%.go: %.c $(before-compile); $(compile-command.c)
 170 $(objpfx)%.d: %.c $(before-compile); $(+make-deps)
 171
 172 # Omit the objpfx rules when building in the source tree, because
 173 # objpfx is empty and so these rules just override the ones above.
 174 ifdef objpfx
 175 # Define first rules to find the source files in $(objpfx).
 176 # Generated source files will end up there.
 177 $(objpfx)%.o: $(objpfx)%.S $(before-compile); $(compile-command.S)
 178 $(objpfx)%.so: $(objpfx)%.S $(before-compile); $(compile-command.S)
 179 $(objpfx)%.po: $(objpfx)%.S $(before-compile); $(compile-command.S)
 180 $(objpfx)%.go: $(objpfx)%.S $(before-compile); $(compile-command.S)
 181 $(objpfx)%.d: $(objpfx)%.S $(before-compile); $(+make-deps)
 182 $(objpfx)%.o: $(objpfx)%.s $(before-compile); $(compile-command.s)
 183 $(objpfx)%.so: $(objpfx)%.s $(before-compile); $(compile-command.s)
 184 $(objpfx)%.po: $(objpfx)%.s $(before-compile); $(compile-command.s)
 185 $(objpfx)%.go: $(objpfx)%.s $(before-compile); $(compile-command.s)
 186 $(objpfx)%.d: $(objpfx)%.s $(objpfx)dummy.d; $(make-dummy-dep)
 187 $(objpfx)%.o: $(objpfx)%.c $(before-compile); $(compile-command.c)
 188 $(objpfx)%.so: $(objpfx)%.c $(before-compile); $(compile-command.c)
 189 $(objpfx)%.po: $(objpfx)%.c $(before-compile); $(compile-command.c)
 190 $(objpfx)%.go: $(objpfx)%.c $(before-compile); $(compile-command.c)
 191 $(objpfx)%.d: $(objpfx)%.c $(before-compile); $(+make-deps)
 192 endif
 193
 194 # System-dependent makefiles can put in `inhibit-sysdep-asm' wildcard
 195 # patterns matching sysdep directories whose assembly source files should
 196 # be suppressed.
 197 ifdef inhibit-sysdep-asm
 198 define open-check-inhibit-asm
 199 case $$sysdir in $(subst $(empty) ,|,$(inhibit-sysdep-asm))) : ;; *)
 200 endef
 201 close-check-inhibit-asm = ;; esac ;
 202 endif
 203
 204 # Don't include sysd-rules until sysd-Makefile is already there and has been
 205 # included.  It might define inhibit-sysdep-asm, which would affect the
 206 # contents of sysd-rules.
 207 ifdef sysd-Makefile-done
 208 -include $(+sysdir_pfx)sysd-rules
 209 ifneq ($(sysd-rules-sysdirs),$(sysdirs))
 210 # The value of $(sysdirs) the sysd-rules was computed for
 211 # differs from the one we are using now.  So force a rebuild of sysd-rules.
 212 sysd-rules-force = FORCE
 213 FORCE:
 214 endif
 215 endif
 216 $(+sysdir_pfx)sysd-rules: $(+sysdir_pfx)config.make $(..)Makerules \
 217                           $(wildcard $(foreach dir,$(sysdirs),\
 218                                                $(sysdep_dir)/$(dir)/Makefile))\
 219                           $(sysd-rules-force)
 220         -@rm -f $@T
 221         (echo 'sysd-rules-sysdirs := $(sysdirs)';                             \
 222          for sysdir in $(sysdirs); do                                         \
 223            dir="\$$(sysdep_dir)/$$sysdir";                                    \
 224            for o in $(object-suffixes); do \
 225              $(open-check-inhibit-asm) \
 226              echo "\$$(objpfx)%$$o: $$dir/%.S \$$(before-compile); \
 227                   \$$(compile-command.S)";                                    \
 228              echo "\$$(objpfx)%$$o: $$dir/%.s \$$(before-compile); \
 229                   \$$(compile-command.s)";                                    \
 230              $(close-check-inhibit-asm) \
 231              echo "\$$(objpfx)%$$o: $$dir/%.c \$$(before-compile); \
 232                   \$$(compile-command.c)";                                    \
 233            done; \
 234            $(open-check-inhibit-asm) \
 235            echo "\$$(objpfx)%.d: $$dir/%.s \$$(objpfx)dummy.d; \
 236                 \$$(make-dummy-dep)";                          \
 237            echo "\$$(objpfx)%.d: $$dir/%.S \$$(before-compile); \
 238                 \$$(+make-deps)";                                             \
 239            $(close-check-inhibit-asm)   \
 240            echo "\$$(objpfx)%.d: $$dir/%.c \$$(before-compile); \
 241                 \$$(+make-deps)";                                             \
 242          done;                                                                \
 243          echo 'sysd-rules-done = t') > $@T
 244         mv -f $@T $@
 245
 246 ifndef sysd-rules-done
 247 # Don't do deps until this exists, because it provides rules to make the deps.
 248 no_deps=t
 249 endif
 250
 251
 252 ifndef compile-command.S
 253 compile-command.S = $(compile.S) $(OUTPUT_OPTION)
 254 endif
 255 ifndef compile-command.s
 256 compile-command.s = $(COMPILE.s) $< $(OUTPUT_OPTION)
 257 endif
 258 ifndef compile-command.c
 259 compile-command.c = $(compile.c) $(OUTPUT_OPTION)
 260 endif
 261
 262 # GCC can grok options after the file name, and it looks nicer that way.
 263 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
 264 compile.S = $(CC) $< -c $(CPPFLAGS) -DASSEMBLER $(asm-CPPFLAGS)
 265 COMPILE.S = $(CC) -c $(CPPFLAGS) -DASSEMBLER $(asm-CPPFLAGS)
 266 COMPILE.s = $(filter-out -pipe,$(CC)) -c $(ASFLAGS)
 267
 268 # We need this for the output to go in the right place.  It will default to
 269 # empty if make was configured to work with a cc that can't grok -c and -o
 270 # together.  You can't compile the C library with such a compiler.
 271 OUTPUT_OPTION = -o $@
 272
 273 S-CPPFLAGS = $(asm-CPPFLAGS)
 274 define +make-deps
 275 -@rm -f $@
 276 $(+mkdep) $< $(CPPFLAGS) $($(<:$*.%=%)-CPPFLAGS) | \
 277 sed -e 's,$(subst .,\.,$*)\.o,$(foreach o,$(object-suffixes),$(@:.d=$o)) $@,' \
 278 $(sed-remove-objpfx) > $(@:.d=.T)
 279 mv -f $(@:.d=.T) $@
 280 endef
 281 ifneq (,$(objpfx))
 282 # Continuation lines here are dangerous because they introduce spaces!
 283 define sed-remove-objpfx
 284 -e 's@ $(subst .,\.,$(subst @,\@,$(objpfx)))@ $$(objpfx)@g' \
 285 -e 's@^$(subst .,\.,$(subst @,\@,$(objpfx)))@$$(objpfx)@g'
 286 endef
 287 endif
 288 \f
 289 # Figure out the source filenames in this directory.
 290
 291 override sources        := $(addsuffix .c,$(filter-out $(elided-routines),\
 292                                                        $(routines) $(aux) \
 293                                                        $(sysdep_routines)))
 294 sysdep_routines := $(sysdep_routines)
 295
 296 headers := $(headers) $(sysdep_headers)
 297
 298 # This is the list of all object files, gotten by
 299 # replacing every ".c" in `sources' with a ".o".
 300 override objects        := $(addprefix $(objpfx),$(sources:.c=.o))
 301
 302
 303 # This variable is used in ``include $(o-iterator)'' after defining
 304 # $(o-iterator-doit) to produce some desired rule using $o for the object
 305 # suffix, and setting $(object-suffixes-left) to $(object-suffixes); a copy
 306 # is produced for each object suffix in use.
 307 o-iterator = $(patsubst %,$(..)o-iterator.mk,$(object-suffixes-left))
 308
 309 # The makefile may define $(extra-libs) with `libfoo libbar'
 310 # to build libfoo.a et al from the modules listed in $(libfoo-routines).
 311 ifdef extra-libs
 312 # extra-lib.mk is included once for each extra lib to define rules
 313 # to build it, and to add its objects to the various variables.
 314 # During its evaluation, $(lib) is set to the name of the library.
 315 extra-libs-left := $(extra-libs)
 316 include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
 317 endif
 318 \f
 319 +depfiles := $(strip $(sources:.c=.d) \
 320                      $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.so=.o))) \
 321                      $(addsuffix .d,$(others) $(tests)))
 322 +depfiles := $(addprefix $(objpfx),\
 323                          $(filter-out $(addsuffix .d,$(omit-deps)),\
 324                                       $(+depfiles)))
 325
 326 ifdef +depfiles
 327 ifneq ($(no_deps),t)
 328 -include $(+depfiles)
 329 endif
 330 endif
 331 \f\f
 332 # Maximize efficiency by minimizing the number of rules.
 333 .SUFFIXES:      # Clear the suffix list.
 334 # Add the suffixes we use.
 335 .SUFFIXES: .a $(object-suffixes) .S .s .c .h .d
 336
 337 # Generic rule for making directories.
 338 %/:
 339 # mkdir isn't smart enough to strip a trailing /.
 340         mkdir $(@:%/=%)
 341 \f
 342 # Make sure that object files are not removed
 343 # when they are intermediates between sources and library members.
 344 .PRECIOUS: $(addprefix $(objpfx)%,$(object-suffixes))
 345
 346 # Make sure that the parent library archive is never removed.
 347 .PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 348 \f
 349 # Use the verbose option of ar and tar when not running silently.
 350 ifeq    "$(findstring s,$(MAKEFLAGS))" ""       # if not -s
 351 verbose := v
 352 else                                            # -s
 353 verbose :=
 354 endif                                           # not -s
 355
 356 ARFLAGS := r$(verbose)
 357 \f
 358 # This makes all the object files in the parent library archive.
 359
 360 .PHONY: lib libobjs lib-noranlib
 361 lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
 362
 363 # Pattern rule for libraries: depend on the __.SYMDEF member updated by ranlib.
 364 lib%.a: lib%.a($(ar-symtab-name)) ;
 365
 366 # For object-suffix $o, the list of objects with that suffix.
 367 # Makefiles can define `elide-routines.so = foo' to leave foo.so out.
 368 o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
 369                                                        $(elide-routines$o)),\
 370                                             $(objects)))
 371
 372 libobjs: $(foreach o,$(object-suffixes),\
 373                    $(common-objpfx)$(patsubst %,$(libtype$o),c)(\
 374                    $(notdir $(o-objects))))
 375 lib-noranlib: libobjs
 376 others: $(addprefix $(objpfx),$(install-lib))
 377
 378 ifdef objects
 379
 380 # Define a pattern rule that will match many targets libc.a(foo.%), for
 381 # each foo.o in $(objects) (% will just happen always to match `o').  This is
 382 # the only way to define a rule that updates many targets at once with one
 383 # sequence of commands.
 384 define o-iterator-doit
 385 $(common-objpfx)$(patsubst %,$(libtype$o),c)(\
 386 $(addsuffix .%,$(filter-out $(elide-routines$o),$(notdir $(objects:.o=))))): \
 387   $(objpfx)stamp.%-$(subdir) ;
 388 endef
 389 object-suffixes-left := $(object-suffixes)
 390 include $(o-iterator)
 391
 392 # The pattern rule tells Make to remake $(objpfx)stamp.%-$(subdir) as
 393 # the way to update all the foo.% object files in $(objects).  Now we
 394 # define explicit rules to update each $(objpfx)stamp.SUFFIX-$(subdir)
 395 # timestamp file; these rules (one explicit rule is generated for each
 396 # object suffix) will update the parent archive with ar.  Use a static
 397 # pattern rule so $* is set to the object type during the commands.
 398 define o-iterator-doit
 399 $(objpfx)stamp$o-$(subdir): $(objpfx)stamp%-$(subdir): $(o-objects); $$(do-ar)
 400 endef
 401 object-suffixes-left := $(object-suffixes)
 402 include $(o-iterator)
 403 define do-ar
 404 $(patsubst %,cd %;,$(objdir)) \
 405 $(AR) cru$(verbose) ${O%-lib} \
 406       $(patsubst $(objpfx)%,%,$^)
 407 rm -f $@
 408 touch $@
 409 endef
 410 ifdef subdir
 411 O%-lib = $(filter ../,$(firstword $(objdir) ../))$(patsubst %,$(libtype$*),c)
 412 else
 413 O%-lib = $(patsubst %,$(libtype$*),c)
 414 endif
 415
 416 endif
 417
 418 # Rules to update the $(ar-symtab-name) member with ranlib,
 419 # one for each object flavor.
 420 define o-iterator-doit
 421 $(common-objpfx)$(patsubst %,$(libtype$o),c)($(ar-symtab-name)): \
 422           $(common-objpfx)$(patsubst %,$(libtype$o),c)(\
 423             $(patsubst $(objpfx)%,%,$(o-objects))) $(subdirs-stamp-o); \
 424         $$(RANLIB) $$(common-objpfx)$$(patsubst %,$$(libtype$o),c)
 425 endef
 426 ifndef subdir
 427 subdirs-stamps := $(foreach d,$(subdirs),\
 428                             $(firstword $(objdir) $(subdir))/stamp%-$d)
 429 subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
 430 $(subdirs-stamps): subdir_lib;
 431 endif
 432 object-suffixes-left = $(object-suffixes)
 433 include $(o-iterator)
 434
 435
 436 # This makes all the object files.
 437 .PHONY: objects objs
 438 objects objs: $(foreach o,$(object-suffixes),$(o-objects)) \
 439               $(addprefix $(objpfx),$(extra-objs))
 440
 441 # Canned sequence for building an extra library archive.
 442 define build-extra-lib
 443 $(patsubst %,cd %;,$(objdir)) \
 444 $(AR) cru$(verbose) $(@:$(objpfx)%=%) \
 445       $(patsubst $(objpfx)%,%,$^)
 446 $(RANLIB) $@
 447 endef
 448 \f
 449 # Shared library building.
 450
 451 ifeq (yes,$(build-shared))
 452
 453 # Process the shlib-versions file, which tells us what shared library
 454 # version numbers to use when we install shared objects on this system.
 455 -include $(common-objpfx)soversions.mk
 456 $(common-objpfx)soversions.mk: $(..)shlib-versions $(..)Makerules \
 457                                $(common-objpfx)config.make
 458         sed 's/#.*$$//' $< | while read conf versions; do \
 459           test -n "$$versions" || continue; \
 460           case '$(config-machine)-$(config-vendor)-$(config-os)' in $$conf)\
 461             for v in $$versions; do \
 462               lib="$${v%%=*}"; if eval "test -z \"\$$vers_lib$$lib\""; then \
 463                 eval vers_lib$${lib}=yes; \
 464                 echo $$lib.so-version=.$${v##$$lib=}; fi; \
 465           done ;; esac; done > $@T
 466         mv -f $@T $@
 467
 468 # Get $(version) defined with the release version number.
 469 -include $(common-objpfx)version.mk
 470
 471
 472 # Pattern rule to build a shared object from an archive of PIC objects.
 473 # This must come after the installation rules so Make doesn't try to
 474 # build shared libraries in place from the installed *_pic.a files.
 475 # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
 476 # on other shared objects.
 477 lib%.so: lib%_pic.a; $(build-shlib)
 478
 479 ifeq ($(have-no-whole-archive),yes)
 480 no-whole-archive = -Wl,--no-whole-archive
 481 else
 482 no-whole-archive =
 483 endif
 484
 485 define build-shlib
 486 $(LINK.o) -shared -o $@ $(sysdep-LDFLAGS) $(config-LDFLAGS)  \
 487           -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
 488           $(LDFLAGS.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
 489           -Wl,-rpath-link=$(common-objdir) \
 490           -Wl,--whole-archive $^ $(no-whole-archive) \
 491           $(LDLIBS-$(@F:lib%.so=%).so)
 492 endef
 493
 494 # Don't try to use -lc when making libc.so itself.
 495 # Also omits crti.o and crtn.o, which we do not want
 496 # since we define our own `.init' section specially.
 497 LDFLAGS-c.so = -nostdlib -nostartfiles
 498 # Give libc.so an entry point and make it directly runnable itself.
 499 LDFLAGS-c.so += -e __libc_main
 500 # Use our own special initializer and finalizer files for libc.so.
 501 elfobjdir := $(firstword $(objdir) $(patsubst ../$(subdir),.,$(..)elf))
 502 $(common-objpfx)libc.so: $(elfobjdir)/soinit.so \
 503                          $(common-objpfx)libc_pic.a \
 504                          $(elfobjdir)/sofini.so $(elfobjdir)/ld.so
 505         $(build-shlib)
 506
 507 ifdef libc.so-version
 508 $(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
 509         rm -f $@
 510         ln -s $(<F) $@ || ln $< $@
 511 endif
 512 endif
 513 \f
 514 # Installation.
 515
 516 # $(install-lib) are installed from the object directory into $(libdir);
 517 # files in $(install-lib) matching `lib%.a' are ranlib'd after installation
 518 # unless they also appear in $(non-lib.a).  $(install-data) are installed
 519 # as they are into $(datadir).  $(headers) are installed as they are in
 520 # $(includedir).  $(install-bin) and $(install-sbin) are installed from the
 521 # object directory into $(bindir) and $(sbindir), respectively.
 522 # $(install-others) are absolute path names of files to install; rules to
 523 # install them are defined elsewhere.
 524
 525 # The simple library name to install libc.a under.
 526 # This could be defined by a sysdep Makefile.
 527 ifndef libc-name
 528 libc-name := c
 529 endif
 530
 531 define do-install
 532 $(make-target-directory)
 533 $(INSTALL_DATA) $< $@
 534 endef
 535
 536 # Make the target directory if it doesn't exist, using the `mkinstalldirs'
 537 # script that does `mkdir -p' even if `mkdir' doesn't support that flag.
 538 define make-target-directory
 539 $(addprefix $(..)./mkinstalldirs ,\
 540             $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
 541 endef
 542
 543 # Any directory (parent or subdir) that has any object files to build
 544 # should install libc.a; this way "make install" in a subdir is guaranteed
 545 # to install everything it changes.
 546 ifdef objects
 547 installed-libcs := $(foreach o,$(object-suffixes),\
 548                              $(libdir)/$(patsubst %,$(libtype$o),\
 549                                                   $(libprefix)$(libc-name)))
 550 installed-libcs := $(filter-out %_pic.a,$(installed-libcs))
 551 install: $(installed-libcs)
 552 $(installed-libcs): $(libdir)/lib$(libprefix)%: lib
 553         $(make-target-directory)
 554         $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
 555 # Running ranlib after installing makes the __.SYMDEF time stamp up to
 556 # date, which avoids messages from some linkers.
 557         $(RANLIB) $@
 558 endif
 559
 560 define do-install-program
 561 $(make-target-directory)
 562 $(INSTALL_PROGRAM) $< $@.new
 563 mv -f $@.new $@
 564 endef
 565
 566 install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
 567 install-lib := $(filter-out %.so %_pic.a,$(install-lib))
 568 ifeq (yes,$(build-shared))
 569
 570 install-lib-nosubdir: $(install-lib.so:%=$(libdir)/%)
 571
 572 # Find which .so's have versions.
 573 versioned := $(strip $(foreach so,$(install-lib.so),\
 574                                $(patsubst %,$(so),$($(so)-version))))
 575
 576 # Install all the unversioned shared libraries.
 577 $(addprefix $(libdir)/,$(filter-out $(versioned),$(install-lib.so))): \
 578 $(libdir)/%.so: $(objpfx)%.so; $(do-install-program)
 579
 580 make-link = cd $(@D); rm -f $(@F); $(LN_S) $(<F) $(@F)
 581
 582 ifdef libc.so-version
 583 # For a library specified to be version N, install three files:
 584 # libc.so       ->      libc.so.N       (e.g. libc.so.6)
 585 # libc.so.6     ->      libc-VERSION.so (e.g. libc-1.10.so)
 586
 587 $(slibdir)/libc.so$(libc.so-version): $(slibdir)/libc-$(version).so
 588         $(make-link)
 589 $(slibdir)/libc-$(version).so: $(common-objpfx)libc.so; $(do-install-program)
 590 install: $(slibdir)/libc.so$(libc.so-version)
 591
 592 ifndef subdir
 593 # What we install as libc.so for programs to link against is in fact an
 594 # archive.  It contains the various $(static-only-routines) objects, and
 595 # the special object libc-syms.so that contains just the dynamic symbol
 596 # table of the shared libc object.
 597 install: $(libdir)/libc.so
 598 $(libdir)/libc.so: $(common-objpfx)libc.so$(libc.so-version) \
 599                    $(elfobjdir)/$(rtld-installed-name) \
 600                    $(common-objpfx)libc.a
 601         (echo '/* Use the shared library, but some functions are only in';\
 602          echo '   the static library, so try that secondarily.'; \
 603          echo '   The dynamic linker defines some functions used by $(<F),';\
 604          echo '   but ld uses definitions from libc.a before the examining';\
 605          echo '    dependencies of $(<F) to find $(rtld-installed-name).  */';\
 606          echo 'GROUP ( $(^F) )') > $@.new
 607         mv -f $@.new $@
 608
 609 endif
 610
 611 else
 612 install: $(slibdir)/libc.so
 613 $(slibdir)/libc.so: $(common-objpfx)libc.so; $(do-install-program)
 614 endif
 615
 616
 617 ifneq (,$(versioned))
 618 # Produce three sets of rules as above for all the smaller versioned libraries.
 619
 620 define o-iterator-doit
 621 $(libdir)/$o: $(libdir)/$o$($o-version); $$(make-link)
 622 endef
 623 object-suffixes-left := $(versioned)
 624 include $(o-iterator)
 625
 626 # Make symlinks in the build directory, because the versioned names might
 627 # be referenced by a DT_NEEDED in another library.
 628 define o-iterator-doit
 629 $(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
 630 endef
 631 object-suffixes-left := $(versioned)
 632 include $(o-iterator)
 633
 634
 635 define o-iterator-doit
 636 $(libdir)/$o$($o-version): $(libdir)/$(o:.so=)-$(version).so; $$(make-link)
 637 endef
 638 object-suffixes-left := $(versioned)
 639 include $(o-iterator)
 640
 641 define o-iterator-doit
 642 $(libdir)/$(o:.so=)-$(version).so: $(objpfx)$o; $$(do-install-program)
 643 endef
 644 object-suffixes-left := $(versioned)
 645 include $(o-iterator)
 646 endif
 647
 648 define do-install-so
 649 $(do-install-program)
 650 $(patsubst %,ln -s -f $(@F) $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
 651            $(filter-out %.so,$@))
 652 endef
 653
 654 so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
 655 $(foreach v,$(so-versions),\
 656           $(libdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so
 657         $(do-install-so)
 658 $(foreach v,$(so-versions),\
 659           $(libdir)/$(libprefix)%$v): $(common-objpfx)%.so
 660         $(do-install-so)
 661 endif
 662
 663 ifdef install-bin
 664 $(addprefix $(bindir)/,$(install-bin)): $(bindir)/%: $(objpfx)%
 665         $(do-install-program)
 666 endif
 667 ifdef install-sbin
 668 $(addprefix $(sbindir)/,$(install-sbin)): $(sbindir)/%: $(objpfx)%
 669         $(do-install-program)
 670 endif
 671 ifdef install-lib
 672 install-lib.a := $(filter lib%.a,$(install-lib))
 673 install-lib-non.a := $(filter-out lib%.a,$(install-lib))
 674 ifdef install-lib-non.a
 675 $(addprefix $(libdir)/$(libprefix),$(install-lib-non.a)): \
 676   $(libdir)/$(libprefix)%: $(objpfx)%
 677         $(do-install)
 678 endif
 679 ifdef install-lib.a
 680 $(install-lib.a:lib%.a=$(libdir)/lib$(libprefix)%.a): \
 681   $(libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a
 682         $(do-install)
 683         $(patsubst %,$(RANLIB) $@,$(filter-out $(non-lib.a),$(<F)))
 684 endif
 685 endif
 686 ifdef install-data
 687 $(addprefix $(datadir)/,$(install-data)): $(datadir)/%: %;$(do-install)
 688 endif
 689 headers := $(strip $(headers))
 690 ifdef headers
 691 $(addprefix $(includedir)/,$(headers)): \
 692         $(includedir)/%: %;$(do-install)
 693 endif   # headers
 694
 695 .PHONY: install-bin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
 696         install-data-nosubdir install-headers-nosubdir
 697 install-bin-nosubdir: $(addprefix $(bindir)/,$(install-bin))
 698 install-sbin-nosubdir: $(addprefix $(sbindir)/,$(install-sbin))
 699 install-lib-nosubdir: $(addprefix $(libdir)/,\
 700                        $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
 701                        $(addprefix $(libprefix),$(install-lib-non.a)))
 702 install-data-nosubdir: $(addprefix $(datadir)/,$(install-data))
 703 install-headers-nosubdir: $(addprefix $(includedir)/,$(headers))
 704 install-others-nosubdir: $(install-others)
 705
 706 # We need all the `-nosubdir' targets so that `install' in the parent
 707 # doesn't depend on several things which each iterate over the subdirs.
 708 # This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
 709 # subroutine.  Then in the parent `install-FOO' also causes subdir makes.
 710 install-%:: install-%-nosubdir ;
 711
 712 .PHONY: install install-no-libc.a-nosubdir
 713 install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir\
 714                             install-bin-nosubdir install-lib-nosubdir   \
 715                             install-others-nosubdir install-sbin-nosubdir
 716 install: install-no-libc.a-nosubdir
 717 \f
 718 # Command to compile $< in $(objdir) using the native libraries.
 719 define native-compile
 720 cwd=`pwd`; cd $(@D); $(BUILD_CC) $(BUILD_CFLAGS) \
 721            $(addprefix $$cwd/,$^) -o $(@F)
 722 endef
 723
 724 # Command to compile $< in $(common-objdir) using the native libraries.
 725 define common-objdir-compile
 726 cd $(@D); $(BUILD_CC) $(BUILD_CFLAGS) $(<:$(common-objpfx)%=%) -o $(@F)
 727 endef
 728
 729 # We always want to use configuration definitions.
 730 ifdef objdir
 731 # This is always used in $(common-objdir), so we use no directory name.
 732 BUILD_CFLAGS = -include config.h
 733 else
 734 BUILD_CFLAGS = -include $(..)config.h
 735 endif
 736
 737 # Support the GNU standard name for this target.
 738 .PHONY: check
 739 check: tests
 740 \f
 741 .PHONY: TAGS
 742 TAGS: distinfo $(..)MakeTAGS
 743         $(MAKE) $(addprefix -f ,$^) $@
 744
 745 $(..)po/%.pot: distinfo $(..)MakeTAGS FORCE
 746         $(MAKE) $(addprefix -f ,$(filter-out FORCE,$^)) $@
 747 FORCE:
 748
 749
 750 .PHONY: echo-headers
 751 echo-headers:
 752         @echo $(headers)
 753
 754 \f
 755 # Common cleaning targets.
 756
 757 .PHONY: common-mostlyclean common-clean mostlyclean clean
 758 clean: common-clean
 759 mostlyclean: common-mostlyclean
 760
 761 # Remove the object files.
 762 common-mostlyclean:
 763         -rm -f $(addprefix $(objpfx),$(tests) $(others) \
 764                                      $(addsuffix .o,$(tests) $(others)) \
 765                                      $(addsuffix .out,$(tests)))
 766         -rm -f $(addprefix $(objpfx),$(extra-objs) $(install-lib))
 767         -rm -f core $(objpfx)stub-$(subdir)
 768         $(rmobjs)
 769 define rmobjs
 770 $(foreach o,$(object-suffixes),
 771 -rm -f $(addprefix $(objpfx),stamp$o-$(subdir)) $(o-objects))
 772 endef
 773
 774 # Also remove the dependencies and generated source files.
 775 common-clean: common-mostlyclean
 776         -rm -f $(addprefix $(objpfx),$(generated)) $(+depfiles)
 777 \f
 778 # Produce a file `stub-$(subdir)' which contains `#define __stub_FUNCTION'
 779 # for each function which is a stub.  We grovel over all the .d files
 780 # looking for references to source files in sysdeps/stub.  Then we grovel
 781 # over each referenced source file to see what stub function it defines.
 782
 783 .PHONY: stubs # The parent Makefile calls this target.
 784 stubs: $(common-objpfx)stub-$(subdir)
 785 s = $(sysdep_dir)/stub
 786 $(common-objpfx)stub-$(subdir): $(+depfiles)
 787 # Use /dev/null since `...` might expand to empty.
 788         (s=`cd $s; /bin/pwd`; \
 789          $(patsubst %,cd %;,$(objdir)) \
 790          sed -n 's/^stub_warning *(\([^)]*\).*$$/#define __stub_\1/p' \
 791              `sed -n 's@^.*$s/\([a-z0-9_-]*\.c\).*$$@'"$$s"/'\1@p' \
 792                   $(patsubst $(objpfx)%,%,$^) /dev/null` \
 793              /dev/null) > $@T
 794         mv -f $@T $@
 795 \f
 796 # Make the distribution tar file.
 797
 798 .PHONY: dist
 799 dist: distinfo $(..)Make-dist
 800         $(MAKE) -f $< -f $(word 2,$^) $(Make-dist-args)
 801
 802 # Avoid depending on source files found in sysdeps dirs,
 803 # because the references affect implicit rule selection.
 804 dist: $(filter-out %.c %.S %.s,$(distribute))
 805
 806 # We used to simply export all these variables, but that frequently made the
 807 # environment get too large.  Instead, we write all the information into
 808 # a generated makefile fragment `distinfo', and then include it with -f in
 809 # the sub-make that makes the distribution (above).
 810 distinfo: Makefile $(..)Makerules
 811         $(distinfo-vars)
 812         mv -f $@.new $@
 813
 814 define distinfo-vars
 815 rm -f $@.new
 816 $(foreach var,subdir subdir-dirs sources elided-routines sysdep_routines \
 817               headers sysdep_headers distribute dont_distribute generated \
 818               others tests extra-libs $(extra-libs:%=%-routines) \
 819               $(addprefix install-,lib data bin sbin others),
 820 echo >> $@.new '$(subdir)-$(var) := $($(var))'
 821 echo >> $@.new '$(var) = $$($(subdir)-$(var))')
 822 endef
 823 \f
 824 ifneq (,$(strip $(gpl2lgpl)))
 825 ifneq (,$(wildcard $(..)gpl2lgpl.sed))
 826 # Snarf from the master source and frob the copying notice.
 827 $(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
 828         sed -f $^ > $@-tmp
 829 # So I don't edit them by mistake.
 830         chmod a-w $@-tmp
 831         mv -f $@-tmp $@
 832         test ! -d CVS || cvs commit -m'Updated from $^' $@
 833 endif
 834 endif