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