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