Makeconfig

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