Makeconfig

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