Makeconfig

   1 # Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98 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 #       Makefile configuration options for the GNU C library.
  21 #
  22 ifneq (,)
  23 This makefile requires GNU Make.
  24 endif
  25
  26 all: # Make this the default goal
  27
  28 ifneq "$(origin +included-Makeconfig)" "file"
  29
  30 +included-Makeconfig := yes
  31
  32 ifdef subdir
  33 .. := ../
  34 endif
  35
  36 # If config.make exists, the source directory was configured,
  37 # so don't try to be clever and find another directory to build in.
  38 ifneq (,$(wildcard $(..)config.make))
  39 ARCH =
  40 machine =
  41 else    # Not configured.
  42 ifndef ARCH
  43 ifdef machine
  44 ARCH = $(machine)
  45 endif # machine
  46 endif # ARCH
  47 endif # config.make
  48
  49 # Directory for object files and libc.a.  If this is not defined, the
  50 # object files live in the subdirectories where their sources live, and
  51 # libc.a lives in the parent directory (this probably doesn't work any
  52 # more).
  53 ifdef ARCH
  54 ifeq ($(filter /%,$(ARCH)),)
  55 objdir := $(..)$(ARCH)
  56 else
  57 objdir = $(ARCH)
  58 endif
  59 endif
  60
  61 # $(common-objdir) is the place to put objects and
  62 # such that are not specific to a single subdir.
  63 ifdef objdir
  64 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
  65 common-objpfx = $(objdir)/
  66 common-objdir = $(objdir)
  67 else
  68 objpfx :=
  69 ifdef ..
  70 common-objpfx = $(..)
  71 common-objdir = ..
  72 else
  73 # This is a kludge.  make wizards might grok.
  74 common-objpfx = sysdeps/../
  75 common-objdir = .
  76 endif
  77 endif
  78
  79 # Root of the sysdeps tree.
  80 sysdep_dir := $(..)sysdeps
  81 export sysdep_dir := $(sysdep_dir)
  82
  83 # Get the values defined by options to `configure'.
  84 include $(common-objpfx)config.make
  85
  86 # We have a special subdir for each binary format.
  87 # For now, only ELF is fully supported.
  88 ifeq ($(elf),yes)
  89 binfmt-subdir = elf
  90 else
  91 # This is probably better than nothing.
  92 binfmt-subdir = aout
  93 endif
  94
  95 # Complete path to sysdep dirs.
  96 full-config-sysdirs := $(filter /%, $(config-sysdirs)) \
  97                        $(addprefix $(..), $(filter-out /%, $(config-sysdirs)))
  98 export full-config-sysdirs := $(full-config-sysdirs)
  99
 100 # Run config.status to update config.make and config.h.  We don't show the
 101 # dependence of config.h to Make, because it is only touched when it
 102 # changes and so config.status would be run every time; the dependence of
 103 # config.make should suffice to force regeneration and re-exec, and the new
 104 # image will notice if config.h changed.
 105 $(common-objpfx)config.make: $(common-objpfx)config.status \
 106                              $(..)config.make.in $(..)config.h.in
 107         cd $(<D); $(SHELL) $(<F)
 108
 109 # Find all the sysdeps configure fragments, to make sure we re-run
 110 # configure when any of them changes.
 111 $(common-objpfx)config.status: $(..)version.h $(..)configure \
 112                                $(foreach dir,$(full-config-sysdirs),\
 113                                          $(wildcard \
 114                                            $(dir)/Implies) \
 115                                          $(patsubst %.in,%,\
 116                                                     $(firstword $(wildcard \
 117  $(addprefix $(dir)/,configure configure.in)))))
 118         @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
 119          echo The GNU C library has not been configured. >&2; \
 120          echo Run \`configure\' to configure it before building. >&2; \
 121          echo Try \`configure --help\' for more details. >&2; \
 122          exit 1; fi
 123
 124 # We don't want CPPFLAGS to be exported to the command running configure.
 125 unexport CPPFLAGS
 126
 127 # Get the user's configuration parameters.
 128 ifneq ($(wildcard $(..)configparms),)
 129 include $(..)configparms
 130 endif
 131 ifneq ($(objpfx),)
 132 ifneq ($(wildcard $(common-objpfx)configparms),)
 133 include $(common-objpfx)configparms
 134 endif
 135 endif
 136 \f
 137 ####
 138 ####    These are the configuration variables.  You can define values for
 139 ####    the variables below in the file `configparms'.
 140 ####    Do NOT edit this file.
 141 ####
 142
 143
 144 # Set this to either `stdio' or `libio', to compile in either GNU stdio
 145 # or GNU libio.
 146 ifndef stdio
 147 stdio = stdio
 148 endif
 149
 150 # Common prefix for machine-independent installation directories.
 151 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
 152 prefix = /usr/local
 153 endif
 154
 155 # Decide whether we shall build the programs or not.  We always do this
 156 # unless the user tells us (in configparms) or we are building for a
 157 # standalone target.
 158 ifndef build-programs
 159 ifneq ($(config-os),none)
 160 build-programs=yes
 161 else
 162 build-programs=no
 163 endif
 164 endif
 165
 166 # Common prefix for machine-dependent installation directories.
 167 ifeq ($(origin exec_prefix),undefined)
 168 exec_prefix = $(prefix)
 169 endif
 170
 171 # Where to install the library and object files.
 172 ifndef libdir
 173 libdir = $(exec_prefix)/lib
 174 endif
 175 inst_libdir = $(install_root)$(libdir)
 176
 177 # Where to install the shared library and dynamic linker.
 178 ifndef slibdir
 179 slibdir = $(exec_prefix)/lib
 180 endif
 181 inst_slibdir = $(install_root)$(slibdir)
 182
 183 # Prefix to put on files installed in $(libdir).  For libraries `libNAME.a',
 184 # the prefix is spliced between `lib' and the name, so the linker switch
 185 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
 186 # just prepended to the whole file name.
 187 ifeq ($(origin libprefix),undefined)
 188 libprefix =
 189 endif
 190
 191 # Where to install the header files.
 192 ifndef includedir
 193 includedir = $(exec_prefix)/include
 194 endif
 195 inst_includedir = $(install_root)$(includedir)
 196
 197 # Where to install machine-independent data files.
 198 # These are the timezone database, and the locale database.
 199 ifndef datadir
 200 datadir = $(prefix)/share
 201 endif
 202 inst_datadir = $(install_root)$(datadir)
 203
 204 # Where to install the timezone data files (which are machine-independent).
 205 ifndef zonedir
 206 zonedir = $(datadir)/zoneinfo
 207 endif
 208 inst_zonedir = $(install_root)$(zonedir)
 209
 210 # Where to install the locale and message catalog data files (which are
 211 # machine-independent).
 212 ifndef localedir
 213 localedir = $(datadir)/locale
 214 endif
 215 inst_localedir = $(install_root)$(localedir)
 216
 217 # Where to install the locale charmap source files.
 218 ifndef i18ndir
 219 i18ndir = $(datadir)/i18n
 220 endif
 221 inst_i18ndir = $(install_root)$(i18ndir)
 222
 223 # Where to install the shared object for charset transformation.
 224 ifndef gconvdir
 225 gconvdir = $(libdir)/gconv
 226 endif
 227 inst_gconvdir = $(install_root)$(gconvdir)
 228
 229 # Where to install programs.
 230 ifndef bindir
 231 bindir = $(exec_prefix)/bin
 232 endif
 233 inst_bindir = $(install_root)$(bindir)
 234
 235 # Where to install internal programs.
 236 ifndef libexecdir
 237 libexecdir = $(exec_prefix)/libexec
 238 endif
 239 inst_libexecdir = $(install_root)$(libexecdir)
 240
 241 # Where to install administrative programs.
 242 ifndef rootsbindir
 243 rootsbindir = $(exec_prefix)/sbin
 244 endif
 245 inst_rootsbindir = $(install_root)$(rootsbindir)
 246
 247 ifndef sbindir
 248 sbindir = $(exec_prefix)/sbin
 249 endif
 250 inst_sbindir = $(install_root)$(sbindir)
 251
 252 # Where to install the Info files.
 253 ifndef infodir
 254 infodir = $(prefix)/info
 255 endif
 256 inst_infodir = $(install_root)$(infodir)
 257
 258 # Where to install default configuration files.  These include the local
 259 # timezone specification and network data base files.
 260 ifndef sysconfdir
 261 sysconfdir = $(prefix)/etc
 262 endif
 263 inst_sysconfdir = $(install_root)$(sysconfdir)
 264
 265 # What timezone should be the installed default (e.g., US/Eastern).
 266 # Run `make -C time echo-zonenames' to see a list of available zone names.
 267 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
 268 ifndef localtime
 269 localtime = Factory
 270 endif
 271
 272 # Where to install the "localtime" timezone file; this is the file whose
 273 # contents $(localtime) specifies.  If this is a relative pathname, it is
 274 # relative to $(zonedir).  It is a good idea to put this somewhere
 275 # other than there, so the zoneinfo directory contains only universal data,
 276 # localizing the configuration data elsewhere.
 277 ifndef localtime-file
 278 localtime-file = $(sysconfdir)/localtime
 279 inst_localtime-file = $(install_root)$(localtime-file)
 280 endif
 281
 282 # What to use for leap second specifications in compiling the default
 283 # timezone files.  Set this to `/dev/null' for no leap second handling as
 284 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
 285 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
 286 # This variable determines the default: if it's `/dev/null',
 287 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
 288 ifndef leapseconds
 289 leapseconds = /dev/null
 290 endif
 291
 292 # What timezone's DST rules should be used when a POSIX-style TZ
 293 # environment variable doesn't specify any rules.  For 1003.1 compliance
 294 # this timezone must use rules that are as U.S. federal law defines DST.
 295 # Run `make -C time echo-zonenames' to see a list of available zone names.
 296 # This setting can be changed with `zic -p TIMEZONE' at any time.
 297 # If you want POSIX.1 compatibility, use `America/New_York'.
 298 ifndef posixrules
 299 posixrules = America/New_York
 300 endif
 301
 302 # Where to install the "posixrules" timezone file; this is file
 303 # whose contents $(posixrules) specifies.  If this is a relative
 304 # pathname, it is relative to $(zonedir).
 305 ifndef posixrules-file
 306 posixrules-file = posixrules
 307 endif
 308
 309
 310 # Directory where your system's native header files live.
 311 # This is used on Unix systems to generate some GNU libc header files.
 312 ifndef sysincludedir
 313 sysincludedir = /usr/include
 314 endif
 315
 316
 317 # Commands to install files.
 318 ifndef INSTALL_DATA
 319 INSTALL_DATA = $(INSTALL) -m 644
 320 endif
 321 ifndef INSTALL_PROGRAM
 322 INSTALL_PROGRAM = $(INSTALL)
 323 endif
 324 ifndef INSTALL
 325 INSTALL = install
 326 endif
 327
 328
 329 # The name of the C compiler.
 330 # If you've got GCC, and it works, use it.
 331 ifeq ($(origin CC),default)
 332 CC := gcc
 333 endif
 334
 335 # The name of the C compiler to use for compilations of programs to run on
 336 # the host that is building the library.  If you set CC to a
 337 # cross-compiler, you must set this to the normal compiler.
 338 ifndef BUILD_CC
 339 BUILD_CC = $(CC)
 340 endif
 341
 342 # Default flags to pass the C compiler.
 343 ifndef default_cflags
 344 default_cflags := -g -O
 345 endif
 346
 347 # Flags to pass the C compiler when assembling preprocessed assembly code
 348 # (`.S' files).  On some systems the assembler doesn't understand the `#' line
 349 # directives the preprocessor produces.  If you have troubling compiling
 350 # assembly code, try using -P here to suppress these directives.
 351 ifndef asm-CPPFLAGS
 352 asm-CPPFLAGS =
 353 endif
 354
 355 # ELF always supports init/fini sections
 356 ifeq ($(elf),yes)
 357 have-initfini = yes
 358 endif
 359
 360 # Installed name of the startup code.
 361 ifneq ($(have-initfini),yes)
 362 # When not having init/fini, there is just one startfile, called crt0.o.
 363 start-installed-name = crt0.o
 364 else
 365 # On systems having init/fini, crt0.o is called crt1.o, and there are
 366 # some additional bizarre files.
 367 start-installed-name = crt1.o
 368 endif
 369
 370
 371 # Command for linking programs with the C library.
 372 ifndef +link
 373 +link = $(CC) -nostdlib -nostartfiles -o $@ \
 374               $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS)  \
 375               $(addprefix $(csu-objpfx),$(start-installed-name)) \
 376               $(+preinit) $(+prector) \
 377               $(filter-out $(addprefix $(csu-objpfx),start.o \
 378                                                      $(start-installed-name))\
 379                            $(+preinit) $(link-extra-libs) \
 380                            $(common-objpfx)libc% $(+postinit),$^) \
 381               $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
 382 endif
 383 ifndef config-LDFLAGS
 384 ifeq (yes,$(build-shared))
 385 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
 386 endif
 387 endif
 388 ifndef link-libc
 389 ifeq (yes,$(build-shared))
 390 # We need the versioned name of libc.so in the deps of $(others) et al
 391 # so that the symlink to libc.so is created before anything tries to
 392 # run the linked programs.
 393 link-libc = -Wl,-rpath-link=$(rpath-link) \
 394             $(common-objpfx)libc.so$(libc.so-version) \
 395             $(elfobjdir)/$(rtld-installed-name) \
 396             $(common-objpfx)libc.a $(gnulib)
 397 # Choose the default search path for the dynamic linker based on
 398 # where we will install libraries.
 399 ifneq ($(libdir),$(slibdir))
 400 default-rpath = $(slibdir):$(libdir)
 401 else
 402 default-rpath = $(libdir)
 403 endif
 404 # This is how to find at build-time things that will be installed there.
 405 rpath-link = $(common-objdir):$(mathobjdir):$(elfobjdir):$(nssobjdir):$(dbobjdir)
 406 mathobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)math)
 407 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
 408 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
 409 dbobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)db2)
 410 else
 411 link-libc = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
 412 endif
 413 endif
 414
 415 ifndef link-extra-libs
 416 ifeq (yes,$(build-shared))
 417 ifneq ($(common-objpfx),$(objpfx))
 418 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),\
 419         $(wildcard $(common-objpfx)$(lib).so$($(notdir $(lib)).so-version) \
 420                    $(objpfx)$(lib).so$($(notdir $(lib)).so-version)))
 421 else
 422 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).so$($(notdir $(lib)).so-version))
 423 endif
 424 else
 425 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
 426 endif
 427 endif
 428 ifndef gnulib
 429 gnulib := -lgcc
 430 endif
 431 ifeq ($(elf),yes)
 432 +preinit = $(addprefix $(csu-objpfx),crti.o)
 433 +postinit = $(addprefix $(csu-objpfx),crtn.o)
 434 +prector = `$(CC) --print-file-name=crtbegin.o`
 435 +postctor = `$(CC) --print-file-name=crtend.o`
 436 endif
 437 csu-objpfx = $(common-objpfx)csu/
 438 elf-objpfx = $(common-objpfx)elf/
 439 db-objpfx = $(common-objpfx)db/
 440
 441 # How to run a program we just linked with our library.
 442 # The program binary is assumed to be $(word 2,$^).
 443 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
 444 ifneq (yes,$(build-shared))
 445 built-program-cmd = $(built-program-file)
 446 else
 447 comma = ,
 448 sysdep-library-path = \
 449 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
 450                                        $(filter -Wl$(comma)-rpath-link=%,\
 451                                                 $(sysdep-LDFLAGS)))))
 452 define built-program-cmd
 453 LD_LIBRARY_PATH=$(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
 454 $(elf-objpfx)$(rtld-installed-name) $(built-program-file)
 455 endef
 456 endif
 457
 458 ifndef LD
 459 LD := ld -X
 460 endif
 461
 462 ifndef  RANLIB
 463 RANLIB = ranlib
 464 endif
 465
 466 # Extra flags to pass to GCC.
 467 +gccwarn := -Wall -Wwrite-strings -Wno-parentheses -Winline -Wstrict-prototypes
 468
 469 # This is the program that generates makefile
 470 # dependencies from C source files.
 471 ifndef +mkdep
 472 +mkdep = $(CC) -M
 473 endif
 474
 475 # The program that makes Emacs-style TAGS files.
 476 ETAGS   := etags -T
 477
 478 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
 479 # perhaps others) to preprocess assembly code in some cases.
 480 M4 = m4
 481
 482 ####
 483 #### End of configuration variables.
 484 ####
 485 \f
 486 # This tells some versions of GNU make before 3.63 not to export all variables.
 487 .NOEXPORT:
 488
 489 # We want to echo the commands we're running without
 490 # umpteen zillion filenames along with it (we use `...' instead)
 491 # but we don't want this echoing done when the user has said
 492 # he doesn't want to see commands echoed by using -s.
 493 ifneq   "$(findstring s,$(MAKEFLAGS))" ""       # if -s
 494 +cmdecho        := echo >/dev/null
 495 else                                            # not -s
 496 +cmdecho        := echo
 497 endif                                           # -s
 498
 499 # These are the flags given to the compiler to tell
 500 # it what sort of optimization and/or debugging output to do.
 501 ifndef  +cflags
 502 # If `CFLAGS' was defined, use that.
 503 ifdef           CFLAGS
 504 +cflags := $(filter-out -I%,$(CFLAGS))
 505 endif           # CFLAGS
 506 endif   # +cflags
 507
 508 # If none of the above worked, default to "-g -O".
 509 ifeq    "$(strip $(+cflags))" ""
 510 +cflags := $(default_cflags)
 511 endif   # $(+cflags) == ""
 512
 513 +cflags := $(+cflags) $(+gccwarn)
 514 +gcc-nowarn := -w
 515
 516 # Don't duplicate options if we inherited variables from the parent.
 517 +cflags := $(sort $(+cflags))
 518
 519
 520 # These are flags given to the C compiler to tell it to look for include
 521 # files (including ones given in angle brackets) in the current directory,
 522 # in the parent library source directory and in the include directory.
 523 # `+sysdep-includes' will be defined by Makerules.
 524 +includes = -I. $(patsubst %/,-I%,$(objpfx)) $(patsubst %/,-I%,$(..)) \
 525             -I$(..)include $($(stdio)-include) $(includes) \
 526             $(+sysdep-includes) $(last-includes)
 527
 528 # Since libio has several internal header files, we use a -I instead
 529 # of many little headers in the include directory.
 530 libio-include = -I$(..)libio
 531
 532 # These are the variables that the implicit compilation rules use.
 533 CPPFLAGS = $(+includes) $(defines) -include $(..)include/libc-symbols.h \
 534            $(sysdep-CPPFLAGS) $(CPPFLAGS-$(suffix $@)) $(CPPFLAGS-$(<F)) \
 535            $(CPPFLAGS-$(@F))
 536 override CFLAGS = $(+cflags) $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) \
 537                   $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
 538
 539
 540 # This is the macro that the implicit linking rules use.
 541 ifneq "$(filter -g,$(+cflags))" "" # -g is in $(+cflags)
 542 LDFLAGS := -g
 543 endif
 544
 545
 546 # If everything is compiled with -fPIC (implicitly) we must tell this by
 547 # defining the PIC symbol.
 548 ifeq (yes,$(build-pic-default))
 549 pic-default = -DPIC
 550 endif
 551
 552 # Enable object files for different versions of the library.
 553 # Various things use $(object-suffixes) to know what all to make.
 554 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
 555 # to pass different flags for each flavor.
 556 libtypes = $(foreach o,$(object-suffixes),$(libtype$o))
 557 all-object-suffixes := .o .os .op .og .ob
 558 object-suffixes :=
 559 ifeq (yes,$(build-static))
 560 CPPFLAGS-.o = $(pic-default)
 561 libtype.o := lib%.a
 562 object-suffixes += .o
 563 endif
 564 ifeq (yes,$(build-shared))
 565 # Under --enable-shared, we will build a shared library of PIC objects.
 566 # The PIC object files are named foo.os.
 567 object-suffixes += .os
 568 CPPFLAGS-.os = -DPIC
 569 CFLAGS-.os = $(pic-ccflag)
 570 libtype.os := lib%_pic.a
 571 # This can be changed by a sysdep makefile
 572 pic-ccflag = -fPIC
 573 endif
 574 ifeq (yes,$(build-profile))
 575 # Under --enable-profile, we will build a static library of profiled objects.
 576 # The profiled object files are named foo.op.
 577 object-suffixes += .op
 578 CPPFLAGS-.op = -DPROF $(pic-default)
 579 CFLAGS-.op = -pg
 580 libtype.op = lib%_p.a
 581 endif
 582 ifeq (yes,$(build-omitfp))
 583 # Under --enable-omitfp, we build an the library optimized without
 584 # debugging information using -fomit-frame-pointer, and build an extra
 585 # library with debugging information.  The debuggable objects are named foo.og.
 586 object-suffixes += .og
 587 CPPFLAGS-.og = $(pic-default)
 588 CFLAGS-.og = -g
 589 CFLAGS-.o = -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
 590 CFLAGS-.os += $(CFLAGS-.o)
 591 libtype.og = lib%_g.a
 592 endif
 593 ifeq (yes,$(build-bounded))
 594 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
 595 # to runtime bounds checking.  The bounded-pointer objects are named foo.ob.
 596 object-suffixes += .ob
 597 CPPFLAGS-.ob = -DBOUNDED_POINTERS $(pic-default)
 598 CFLAGS-.ob = -g -fbounded-pointers
 599 libtype.ob = lib%_b.a
 600 endif
 601
 602
 603 +gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
 604
 605 ifndef BUILD_CC
 606 BUILD_CC = $(CC)
 607 endif
 608 \f
 609 # Figure out the version numbers from version.h.
 610
 611 $(common-objpfx)version.mk: $(..)version.h $(..)Makeconfig
 612         sed -n -e 's/^.*RELEASE.*"\([^"]*\)".*$$/release=\1/p' \
 613                -e 's/^.*VERSION.*"\([^"]*\)".*$$/version=\1/p' \
 614             < $< > $@-new
 615         mv -f $@-new $@
 616
 617 common-generated += version.mk
 618
 619 ifeq (yes, $(build-shared))
 620
 621 # Process the shlib-versions file, which tells us what shared library
 622 # version numbers to use when we install shared objects on this system.
 623 -include $(common-objpfx)soversions.mk
 624 ifndef avoid-generated
 625 $(common-objpfx)soversions.mk: $(..)shlib-versions $(..)Makeconfig \
 626                                $(wildcard $(patsubst %, $(..)%/shlib-versions,\
 627                                                         $(add-ons))) \
 628                                $(common-objpfx)config.make
 629         (file="$(wildcard $(patsubst %,$(..)%/shlib-versions,$(add-ons))) \
 630                $(..)shlib-versions"; \
 631          for f in $$file; do \
 632            sed 's/#.*$$//' $$f | while read conf versions; do \
 633              test -n "$$versions" && \
 634              test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
 635                         : "$$conf"` != 0 || continue; \
 636              for v in $$versions; do \
 637                lib=`echo $$v | sed 's/=.*$$//'`; \
 638                if eval "test -z \"\$$vers_lib$$lib\""; then \
 639                  eval vers_lib$${lib}=yes; \
 640                  number=`echo $$v | sed "s/^.*=//"`; \
 641                  case $$number in \
 642                    [0-9]*) echo "$$lib.so-version=.$$number"; \
 643                            echo "all-sonames+=$$lib.so\$$($$lib.so-version)";;\
 644                    *) echo "$$lib.so-version=$$number"; \
 645                       echo "all-sonames+=\$$($$lib.so-version)";;  \
 646                  esac; \
 647                fi; \
 648              done; \
 649            done; \
 650          done;) > $@T; exit 0
 651         mv -f $@T $@
 652 endif
 653
 654 postclean-generated += soversions.mk
 655
 656 ifndef avoid-generated
 657 # Get $(version) defined with the release version number.
 658 -include $(common-objpfx)version.mk
 659 endif
 660
 661 # Generate the header containing the names of all shared libraries.
 662 # We use a stamp file to avoid uncessary recompilations.
 663 before-compile += $(common-objpfx)gnu/lib-names.h
 664 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp
 665 $(common-objpfx)gnu/lib-names.stmp: $(common-objpfx)soversions.mk
 666         $(make-target-directory)
 667         @rm -f ${@:stmp=T} $@
 668         (echo '/* This file is automatically generated.';\
 669          echo '   It defines macros to allow user program to find the shared';\
 670          echo '   library files which come as part of GNU libc.  */';\
 671          echo '#ifndef __GNU_LIB_NAMES_H'; \
 672          echo '#define __GNU_LIB_NAMES_H        1'; \
 673          echo; \
 674          (libs='$(all-sonames)';\
 675           for l in $$libs; do \
 676             upname=`echo $$l | sed 's/[.]so.*//' | \
 677                     tr 'abcdefghijklmnopqrstuvwxyz-' \
 678                        'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`; \
 679             echo "#define       $${upname}_SO   \"$$l\""; \
 680           done;) | sort; \
 681          echo; \
 682          echo '#endif   /* gnu/lib-names.h */';) > ${@:stmp=T}
 683         if test -r ${@:stmp=h} && cmp -s ${@:stmp=h} ${@:stmp=T}; \
 684         then rm -f ${@:stmp=T}; \
 685         else mv -f ${@:stmp=T} ${@:stmp=h}; fi
 686         touch $@
 687
 688 common-generated += gnu/lib-names.h gnu/lib-names.stmp
 689
 690 # The name under which the run-time dynamic linker is installed.
 691 # We are currently going for the convention that `/lib/ld.so.1'
 692 # names the SVR4/ELF ABI-compliant dynamic linker.
 693 ifndef rtld-installed-name
 694 ifdef ld.so-version
 695 rtld-installed-name = $(ld.so-version)
 696 else
 697 rtld-installed-name = ld.so.1
 698 endif
 699 endif
 700
 701 ifndef rtld-version-installed-name
 702 rtld-version-installed-name = ld-$(version).so
 703 endif
 704
 705 # The librt must be linked with the thread library, at least
 706 # for now.
 707 ifneq (,$(findstring linuxthreads,$(add-ons)))
 708 shared-thread-library = $(common-objpfx)linuxthreads/libpthread.so
 709 # Yes, we can compile librt.
 710 rt = rt
 711 endif
 712
 713 endif # build-shared
 714
 715 endif # Makeconfig not yet included