Makeconfig

   1 # Copyright (C) 1991-2003,2004,2005,2006,2007 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 Lesser General Public
   6 # License as published by the Free Software Foundation; either
   7 # version 2.1 of the 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 # Lesser General Public License for more details.
  13
  14 # You should have received a copy of the GNU Lesser General Public
  15 # License along with the GNU C Library; if not, write to the Free
  16 # Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17 # 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 # What flags to give to sources which call user provided callbacks
  87 uses-callbacks = $(exceptions)
  88
  89 # What flags to give to tests which test stack alignment
  90 stack-align-test-flags =
  91
  92 # We have a special subdir for each binary format.
  93 # For now, only ELF is fully supported.
  94 ifeq ($(elf),yes)
  95 binfmt-subdir = elf
  96 else
  97 # This is probably better than nothing.
  98 binfmt-subdir = aout
  99 endif
 100
 101 # Complete path to sysdep dirs.
 102 # `configure' writes a definition of `config-sysdirs' in `config.make'.
 103 sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
 104
 105 # Add-ons that contribute sysdeps trees get added to the include list
 106 # after sysdeps/generic.  This makes #include <sysdeps/...> work right
 107 # to find specific add-on files without assuming the add-on directory name.
 108 # It also means that headers can go into an add-on's base directory
 109 # instead of the add-on needing a sysdeps/generic of its own.
 110 sysdeps-srcdirs := $(foreach add-on,$(sysdeps-add-ons),\
 111                              $(firstword $(filter /%,$(add-on)) \
 112                                          $(..)$(add-on)))
 113 +sysdep_dirs = $(sysdirs) $(sysdeps-srcdirs)
 114 ifdef objdir
 115 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
 116 endif
 117
 118 # Run config.status to update config.make and config.h.  We don't show the
 119 # dependence of config.h to Make, because it is only touched when it
 120 # changes and so config.status would be run every time; the dependence of
 121 # config.make should suffice to force regeneration and re-exec, and the new
 122 # image will notice if config.h changed.
 123 $(common-objpfx)config.make: $(common-objpfx)config.status \
 124                              $(..)config.make.in $(..)config.h.in
 125         cd $(<D); $(SHELL) $(<F)
 126
 127 # Find all the add-on and sysdeps configure fragments, to make sure we
 128 # re-run configure when any of them changes.
 129 $(common-objpfx)config.status: $(..)version.h $(..)configure \
 130                                $(foreach dir,$(sysdirs),\
 131                                          $(wildcard $(dir)/Implies) \
 132                                          $(patsubst %.in,%,\
 133                                                     $(firstword $(wildcard \
 134  $(addprefix $(dir)/,configure configure.in))))) \
 135                                $(patsubst %.in,%,\
 136                                           $(foreach add-on,$(add-ons),\
 137                                                     $(firstword $(wildcard \
 138  $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
 139              configure configure.in)))))
 140         @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
 141          echo The GNU C library has not been configured. >&2; \
 142          echo Run \`configure\' to configure it before building. >&2; \
 143          echo Try \`configure --help\' for more details. >&2; \
 144          exit 1; fi
 145
 146 # We don't want CPPFLAGS to be exported to the command running configure.
 147 unexport CPPFLAGS
 148
 149 # Get the user's configuration parameters.
 150 ifneq ($(wildcard $(..)configparms),)
 151 include $(..)configparms
 152 endif
 153 ifneq ($(objpfx),)
 154 ifneq ($(wildcard $(common-objpfx)configparms),)
 155 include $(common-objpfx)configparms
 156 endif
 157 endif
 158 \f
 159 ####
 160 ####    These are the configuration variables.  You can define values for
 161 ####    the variables below in the file `configparms'.
 162 ####    Do NOT edit this file.
 163 ####
 164
 165
 166 # Common prefix for machine-independent installation directories.
 167 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
 168 prefix = /usr/local
 169 endif
 170
 171 # Decide whether we shall build the programs or not.  We always do this
 172 # unless the user tells us (in configparms) or we are building for a
 173 # standalone target.
 174 ifndef build-programs
 175 ifneq ($(config-os),none)
 176 build-programs=yes
 177 else
 178 build-programs=no
 179 endif
 180 endif
 181
 182 # Common prefix for machine-dependent installation directories.
 183 ifeq ($(origin exec_prefix),undefined)
 184 exec_prefix = $(prefix)
 185 endif
 186
 187 # Where to install the library and object files.
 188 ifndef libdir
 189 libdir = $(exec_prefix)/lib
 190 endif
 191 inst_libdir = $(install_root)$(libdir)
 192
 193 # Where to install the shared library and dynamic linker.
 194 ifndef slibdir
 195 slibdir = $(exec_prefix)/lib
 196 endif
 197 inst_slibdir = $(install_root)$(slibdir)
 198
 199 # Prefix to put on files installed in $(libdir).  For libraries `libNAME.a',
 200 # the prefix is spliced between `lib' and the name, so the linker switch
 201 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
 202 # just prepended to the whole file name.
 203 ifeq ($(origin libprefix),undefined)
 204 libprefix =
 205 endif
 206
 207 # Where to install the header files.
 208 ifndef includedir
 209 includedir = $(prefix)/include
 210 endif
 211 inst_includedir = $(install_root)$(includedir)
 212
 213 # Where to install machine-independent data files.
 214 # These are the timezone database, and the locale database.
 215 ifndef datadir
 216 datadir = $(prefix)/share
 217 endif
 218 inst_datadir = $(install_root)$(datadir)
 219
 220 # Where to install the timezone data files (which are machine-independent).
 221 ifndef zonedir
 222 zonedir = $(datadir)/zoneinfo
 223 endif
 224 inst_zonedir = $(install_root)$(zonedir)
 225
 226 # Where to install the locale files.
 227 ifndef localedir
 228 localedir = $(libdir)/locale
 229 endif
 230 inst_localedir = $(install_root)$(localedir)
 231
 232 # Where to install the message catalog data files (which are
 233 # machine-independent).
 234 ifndef msgcatdir
 235 msgcatdir = $(datadir)/locale
 236 endif
 237 inst_msgcatdir = $(install_root)$(msgcatdir)
 238
 239 # Where to install the locale charmap source files.
 240 ifndef i18ndir
 241 i18ndir = $(datadir)/i18n
 242 endif
 243 inst_i18ndir = $(install_root)$(i18ndir)
 244
 245 # Where to install the shared object for charset transformation.
 246 ifndef gconvdir
 247 gconvdir = $(libdir)/gconv
 248 endif
 249 inst_gconvdir = $(install_root)$(gconvdir)
 250
 251 # Where to install programs.
 252 ifndef bindir
 253 bindir = $(exec_prefix)/bin
 254 endif
 255 inst_bindir = $(install_root)$(bindir)
 256
 257 # Where to install internal programs.
 258 ifndef libexecdir
 259 libexecdir = $(exec_prefix)/libexec
 260 endif
 261 inst_libexecdir = $(install_root)$(libexecdir)
 262
 263 # Where to install administrative programs.
 264 ifndef rootsbindir
 265 rootsbindir = $(exec_prefix)/sbin
 266 endif
 267 inst_rootsbindir = $(install_root)$(rootsbindir)
 268
 269 ifndef sbindir
 270 sbindir = $(exec_prefix)/sbin
 271 endif
 272 inst_sbindir = $(install_root)$(sbindir)
 273
 274 # Where to install the Info files.
 275 ifndef infodir
 276 infodir = $(prefix)/info
 277 endif
 278 inst_infodir = $(install_root)$(infodir)
 279
 280 # Where to install default configuration files.  These include the local
 281 # timezone specification and network data base files.
 282 ifndef sysconfdir
 283 sysconfdir = $(prefix)/etc
 284 endif
 285 inst_sysconfdir = $(install_root)$(sysconfdir)
 286
 287 # What timezone should be the installed default (e.g., US/Eastern).
 288 # Run `make -C time echo-zonenames' to see a list of available zone names.
 289 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
 290 ifndef localtime
 291 localtime = Factory
 292 endif
 293
 294 # Where to install the "localtime" timezone file; this is the file whose
 295 # contents $(localtime) specifies.  If this is a relative pathname, it is
 296 # relative to $(zonedir).  It is a good idea to put this somewhere
 297 # other than there, so the zoneinfo directory contains only universal data,
 298 # localizing the configuration data elsewhere.
 299 ifndef localtime-file
 300 localtime-file = $(sysconfdir)/localtime
 301 inst_localtime-file = $(install_root)$(localtime-file)
 302 endif
 303
 304 # What to use for leap second specifications in compiling the default
 305 # timezone files.  Set this to `/dev/null' for no leap second handling as
 306 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
 307 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
 308 # This variable determines the default: if it's `/dev/null',
 309 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
 310 ifndef leapseconds
 311 leapseconds = /dev/null
 312 endif
 313
 314 # What timezone's DST rules should be used when a POSIX-style TZ
 315 # environment variable doesn't specify any rules.  For 1003.1 compliance
 316 # this timezone must use rules that are as U.S. federal law defines DST.
 317 # Run `make -C time echo-zonenames' to see a list of available zone names.
 318 # This setting can be changed with `zic -p TIMEZONE' at any time.
 319 # If you want POSIX.1 compatibility, use `America/New_York'.
 320 ifndef posixrules
 321 posixrules = America/New_York
 322 endif
 323
 324 # Where to install the "posixrules" timezone file; this is file
 325 # whose contents $(posixrules) specifies.  If this is a relative
 326 # pathname, it is relative to $(zonedir).
 327 ifndef posixrules-file
 328 posixrules-file = posixrules
 329 endif
 330
 331
 332 # Directory where your system's native header files live.
 333 # This is used on Unix systems to generate some GNU libc header files.
 334 ifndef sysincludedir
 335 sysincludedir = /usr/include
 336 endif
 337
 338
 339 # Commands to install files.
 340 ifndef INSTALL_DATA
 341 INSTALL_DATA = $(INSTALL) -m 644
 342 endif
 343 ifndef INSTALL_SCRIPT
 344 INSTALL_SCRIPT = $(INSTALL)
 345 endif
 346 ifndef INSTALL_PROGRAM
 347 INSTALL_PROGRAM = $(INSTALL)
 348 endif
 349 ifndef INSTALL
 350 INSTALL = install
 351 endif
 352
 353
 354 # The name of the C compiler.
 355 # If you've got GCC, and it works, use it.
 356 ifeq ($(origin CC),default)
 357 CC := gcc
 358 endif
 359
 360 # The name of the C compiler to use for compilations of programs to run on
 361 # the host that is building the library.  If you set CC to a
 362 # cross-compiler, you must set this to the normal compiler.
 363 ifndef BUILD_CC
 364 BUILD_CC = $(CC)
 365 endif
 366
 367 # Default flags to pass the C compiler.
 368 ifndef default_cflags
 369 ifeq ($(release),stable)
 370 default_cflags := -g -O2
 371 else
 372 default_cflags := -g -O
 373 endif
 374 endif
 375
 376 # Flags to pass the C compiler when assembling preprocessed assembly code
 377 # (`.S' files).  On some systems the assembler doesn't understand the `#' line
 378 # directives the preprocessor produces.  If you have troubling compiling
 379 # assembly code, try using -P here to suppress these directives.
 380 ifndef asm-CPPFLAGS
 381 asm-CPPFLAGS =
 382 endif
 383
 384 # ELF always supports init/fini sections
 385 ifeq ($(elf),yes)
 386 have-initfini = yes
 387 endif
 388
 389 # Installed name of the startup code.
 390 ifneq ($(have-initfini),yes)
 391 # When not having init/fini, there is just one startfile, called crt0.o.
 392 start-installed-name = crt0.o
 393 else
 394 # On systems having init/fini, crt0.o is called crt1.o, and there are
 395 # some additional bizarre files.
 396 start-installed-name = crt1.o
 397 endif
 398 # On systems that do not need a special startfile for statically linked
 399 # binaries, simply set it to the normal name.
 400 ifndef static-start-installed-name
 401 static-start-installed-name = $(start-installed-name)
 402 endif
 403
 404 ifeq (yesyesyes,$(build-shared)$(elf)$(have-z-combreloc))
 405 combreloc-LDFLAGS = -Wl,-z,combreloc
 406 LDFLAGS.so += $(combreloc-LDFLAGS)
 407 LDFLAGS-rtld += $(combreloc-LDFLAGS)
 408 endif
 409
 410 relro-LDFLAGS = -Wl,-z,relro
 411 LDFLAGS.so += $(relro-LDFLAGS)
 412 LDFLAGS-rtld += $(relro-LDFLAGS)
 413
 414 ifeq (yes,$(have-hash-style))
 415 # For the time being we unconditionally use 'both'.  At some time we
 416 # should declare statically linked code as 'out of luck' and compile
 417 # with --hash-style=gnu only.
 418 hashstyle-LDFLAGS = -Wl,--hash-style=both
 419 LDFLAGS.so += $(hashstyle-LDFLAGS)
 420 LDFLAGS-rtld += $(hashstyle-LDFLAGS)
 421 endif
 422
 423 # Command for linking programs with the C library.
 424 ifndef +link
 425 +link = $(CC) -nostdlib -nostartfiles -o $@ \
 426               $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 427               $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 428               $(addprefix $(csu-objpfx),$(start-installed-name)) \
 429               $(+preinit) $(+prector) \
 430               $(filter-out $(addprefix $(csu-objpfx),start.o \
 431                                                      $(start-installed-name))\
 432                            $(+preinit) $(link-extra-libs) \
 433                            $(common-objpfx)libc% $(+postinit),$^) \
 434               $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
 435 endif
 436 # Command for statically linking programs with the C library.
 437 ifndef +link-static
 438 +link-static = $(CC) -nostdlib -nostartfiles -static -o $@ \
 439               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F))  \
 440               $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
 441               $(+preinit) $(+prector) \
 442               $(filter-out $(addprefix $(csu-objpfx),start.o \
 443                                                      $(start-installed-name))\
 444                            $(+preinit) $(link-extra-libs-static) \
 445                            $(common-objpfx)libc% $(+postinit),$^) \
 446               $(link-extra-libs-static) $(link-libc-static) $(+postctor) $(+postinit)
 447 endif
 448 # Command for statically linking bounded-pointer programs with the C library.
 449 ifndef +link-bounded
 450 +link-bounded = $(CC) -nostdlib -nostartfiles -static -fbounded-pointers -o $@ \
 451               $(sysdep-LDFLAGS) $(LDFLAGS)  \
 452               $(addprefix $(csu-objpfx),b$(static-start-installed-name)) \
 453               $(+preinit) $(+prector) \
 454               $(filter-out $(addprefix $(csu-objpfx),start.ob \
 455                                                      $(start-installed-name))\
 456                            $(+preinit) $(link-extra-libs-bounded) \
 457                            $(common-objpfx)libc% $(+postinit),$^) \
 458               $(link-extra-libs-bounded) $(link-libc-bounded) $(+postctor) $(+postinit)
 459 endif
 460 ifndef config-LDFLAGS
 461 ifeq (yesyes,$(build-shared)$(elf))
 462 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
 463 endif
 464 endif
 465 ifndef link-libc
 466 ifeq (yes,$(build-shared))
 467 ifeq ($(elf),yes)
 468 # We need the versioned name of libc.so in the deps of $(others) et al
 469 # so that the symlink to libc.so is created before anything tries to
 470 # run the linked programs.
 471 link-libc = -Wl,-rpath-link=$(rpath-link) \
 472             $(common-objpfx)libc.so$(libc.so-version) \
 473             $(common-objpfx)$(patsubst %,$(libtype.oS),c) $(gnulib)
 474 # This is how to find at build-time things that will be installed there.
 475 rpath-dirs = math elf dlfcn nss nis rt resolv crypt
 476 endif
 477 rpath-link = \
 478 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
 479 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
 480 else
 481 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
 482 resolvobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)resolv)
 483 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
 484 endif
 485 endif
 486
 487 # Differences in the linkers on the various platforms.
 488 ifeq ($(elf),yes)
 489 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
 490 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
 491 LDFLAGS-rdynamic = -rdynamic
 492 LDFLAGS-Bsymbolic = -Bsymbolic
 493 endif
 494
 495 # Choose the default search path for the dynamic linker based on
 496 # where we will install libraries.
 497 ifneq ($(libdir),$(slibdir))
 498 default-rpath = $(slibdir):$(libdir)
 499 else
 500 default-rpath = $(libdir)
 501 endif
 502
 503 ifndef link-extra-libs
 504 link-extra-libs = $(LDLIBS-$(@F))
 505 link-extra-libs-static = $(link-extra-libs)
 506 link-extra-libs-bounded = $(link-extra-libs)
 507 endif
 508
 509 # The static libraries.
 510 ifeq (yes,$(build-static))
 511 link-libc-static = $(common-objpfx)libc.a $(static-gnulib) $(common-objpfx)libc.a
 512 else
 513 ifeq (yes,$(build-shared))
 514 # We can try to link the programs with lib*_pic.a...
 515 link-libc-static = $(static-gnulib) $(common-objpfx)libc_pic.a
 516 endif
 517 endif
 518 link-libc-bounded = $(common-objpfx)libc_b.a $(gnulib) $(common-objpfx)libc_b.a
 519
 520 ifndef gnulib
 521 ifneq ($(have-cc-with-libunwind),yes)
 522   libunwind =
 523 else
 524   libunwind = -lunwind
 525 endif
 526 ifneq ($(have-as-needed),yes)
 527  libgcc_eh := -lgcc_eh $(libunwind)
 528 else
 529  libgcc_eh := -Wl,--as-needed -lgcc_s$(libgcc_s_suffix) $(libunwind) -Wl,--no-as-needed
 530 endif
 531 gnulib := -lgcc $(libgcc_eh)
 532 static-gnulib := -lgcc -lgcc_eh $(libunwind)
 533 libc.so-gnulib := -lgcc
 534 endif
 535 ifeq ($(elf),yes)
 536 +preinit = $(addprefix $(csu-objpfx),crti.o)
 537 +postinit = $(addprefix $(csu-objpfx),crtn.o)
 538 +prector = `$(CC) --print-file-name=crtbegin.o`
 539 +postctor = `$(CC) --print-file-name=crtend.o`
 540 +interp = $(addprefix $(elf-objpfx),interp.os)
 541 endif
 542 csu-objpfx = $(common-objpfx)csu/
 543 elf-objpfx = $(common-objpfx)elf/
 544
 545 # How to run a program we just linked with our library.
 546 # The program binary is assumed to be $(word 2,$^).
 547 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
 548 ifeq (yesyes,$(build-shared)$(elf))
 549 comma = ,
 550 sysdep-library-path = \
 551 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
 552                                        $(filter -Wl$(comma)-rpath-link=%,\
 553                                                 $(sysdep-LDFLAGS)))))
 554 run-program-prefix = $(if $(filter $(notdir $(built-program-file)),\
 555                                    $(tests-static) $(xtests-static)),, \
 556                           $(elf-objpfx)$(rtld-installed-name) \
 557                           --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)))
 558 else
 559 run-program-prefix =
 560 endif
 561 # Never use $(run-program-prefix) for the statically-linked %-bp test programs
 562 built-program-cmd = $(patsubst %,$(run-program-prefix),\
 563                         $(filter-out %-bp,$(built-program-file))) \
 564                     $(built-program-file)
 565
 566 ifndef LD
 567 LD := ld -X
 568 endif
 569
 570 ifndef  RANLIB
 571 RANLIB = ranlib
 572 endif
 573
 574 # Extra flags to pass to GCC.
 575 ifeq ($(all-warnings),yes)
 576 +gccwarn := -Wall -Wwrite-strings -Winline -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
 577 else
 578 +gccwarn := -Wall -Wwrite-strings -Winline
 579 endif
 580 +gccwarn-c = -Wstrict-prototypes
 581
 582 # We do not depend on the address of constants in different files to be
 583 # actually different, so allow the compiler to merge them all.
 584 +merge-constants = -fmerge-all-constants
 585
 586 # This is the program that generates makefile dependencies from C source files.
 587 # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
 588 # targets for headers so that removed headers don't break the build.
 589 ifndef +mkdep
 590 +mkdep = $(CC) -M -MP
 591 endif
 592
 593 # The program that makes Emacs-style TAGS files.
 594 ETAGS   := etags
 595
 596 # The `xgettext' program for producing .pot files from sources.
 597 ifndef XGETTEXT
 598 XGETTEXT = xgettext
 599 endif
 600
 601 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
 602 # perhaps others) to preprocess assembly code in some cases.
 603 M4 = m4
 604
 605 # To force installation of files even if they are older than the
 606 # installed files.  This variable is included in the dependency list
 607 # of all installation targets.
 608 ifeq ($(force-install),yes)
 609 +force = force-install
 610 else
 611 +force =
 612 endif
 613
 614 ####
 615 #### End of configuration variables.
 616 ####
 617 \f
 618 # This tells some versions of GNU make before 3.63 not to export all variables.
 619 .NOEXPORT:
 620
 621 # We want to echo the commands we're running without
 622 # umpteen zillion filenames along with it (we use `...' instead)
 623 # but we don't want this echoing done when the user has said
 624 # he doesn't want to see commands echoed by using -s.
 625 ifneq   "$(findstring s,$(MAKEFLAGS))" ""       # if -s
 626 +cmdecho        := echo >/dev/null
 627 else                                            # not -s
 628 +cmdecho        := echo
 629 endif                                           # -s
 630
 631 # These are the flags given to the compiler to tell
 632 # it what sort of optimization and/or debugging output to do.
 633 ifndef  +cflags
 634 # If `CFLAGS' was defined, use that.
 635 ifdef           CFLAGS
 636 +cflags := $(filter-out -I%,$(CFLAGS))
 637 endif           # CFLAGS
 638 endif   # +cflags
 639
 640 # If none of the above worked, default to "-g -O".
 641 ifeq    "$(strip $(+cflags))" ""
 642 +cflags := $(default_cflags)
 643 endif   # $(+cflags) == ""
 644
 645 +cflags += $(addprefix -mcpu=,$(with-cpu)) $(+gccwarn) $(+merge-constants)
 646 +gcc-nowarn := -w
 647
 648 # Don't duplicate options if we inherited variables from the parent.
 649 +cflags := $(sort $(+cflags))
 650
 651
 652 # These are flags given to the C compiler to tell it to look for
 653 # include files (including ones given in angle brackets) in the parent
 654 # library source directory, in the include directory, and in the
 655 # current directory.
 656 +sysdep-includes = $(addprefix -I,$(+sysdep_dirs))
 657 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
 658             $(+sysdep-includes) $(includes) \
 659             $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
 660
 661 # Since libio has several internal header files, we use a -I instead
 662 # of many little headers in the include directory.
 663 libio-include = -I$(..)libio
 664
 665 # These are the variables that the implicit compilation rules use.
 666 # Note that we can't use -std=* in CPPFLAGS, because it overrides
 667 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
 668 # it causes cpp to stop predefining __ASSEMBLER__.
 669 CPPFLAGS = $($(subdir)-CPPFLAGS) $(+includes) $(defines) \
 670            -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
 671            $(CPPFLAGS-$(suffix $@)) \
 672            $(foreach lib,$(libof-$(basename $(@F))) \
 673                          $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
 674            $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
 675 override CFLAGS = -std=gnu99 $(gnu89-inline-CFLAGS) \
 676                   $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
 677                   $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
 678                   $(CFLAGS-$(@F))
 679 override CXXFLAGS = $(c++-sysincludes) \
 680                     $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
 681                     $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
 682
 683 # If everything is compiled with -fPIC (implicitly) we must tell this by
 684 # defining the PIC symbol.
 685 ifeq (yes,$(build-pic-default))
 686 pic-default = -DPIC
 687 endif
 688
 689 # Enable object files for different versions of the library.
 690 # Various things use $(object-suffixes) to know what all to make.
 691 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
 692 # to pass different flags for each flavor.
 693 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
 694 all-object-suffixes := .o .os .op .og .ob .oS
 695 object-suffixes :=
 696 CPPFLAGS-.o = $(pic-default)
 697 CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
 698 ifeq (yes,$(build-static))
 699 libtype.o := lib%.a
 700 object-suffixes += .o
 701 endif
 702 ifeq (yes,$(build-shared))
 703 # Under --enable-shared, we will build a shared library of PIC objects.
 704 # The PIC object files are named foo.os.
 705 object-suffixes += .os
 706 CPPFLAGS-.os = -DPIC -DSHARED
 707 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
 708 libtype.os := lib%_pic.a
 709 # This can be changed by a sysdep makefile
 710 pic-ccflag = -fPIC
 711 # This one should always stay like this unless there is a very good reason.
 712 PIC-ccflag = -fPIC
 713 endif
 714 ifeq (yes,$(build-profile))
 715 # Under --enable-profile, we will build a static library of profiled objects.
 716 # The profiled object files are named foo.op.
 717 object-suffixes += .op
 718 CPPFLAGS-.op = -DPROF $(pic-default)
 719 CFLAGS-.op = -pg
 720 libtype.op = lib%_p.a
 721 endif
 722 ifeq (yes,$(build-omitfp))
 723 # Under --enable-omitfp, we build the library optimized without
 724 # debugging information using -fomit-frame-pointer, and build an extra
 725 # library with debugging information.  The debuggable objects are named foo.og.
 726 object-suffixes += .og
 727 CPPFLAGS-.og = $(pic-default)
 728 CFLAGS-.og = -g
 729 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
 730 CFLAGS-.os += -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
 731 libtype.og = lib%_g.a
 732 endif
 733
 734 bppfx = BP-
 735 ifeq (yes,$(build-bounded))
 736 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
 737 # to runtime bounds checking.  The bounded-pointer objects are named foo.ob.
 738 # We disable sibling-call optimizations so that stack traces will be complete
 739 # and thus aid debugging, since after all, BPs are a debugging tool.
 740 object-suffixes += .ob
 741 CPPFLAGS-.ob = -fbounded-pointers $(pic-default)
 742 CFLAGS-.ob = -g -O2 -fno-optimize-sibling-calls -fno-strict-aliasing
 743 libtype.ob = lib%_b.a
 744 endif
 745
 746 object-suffixes-for-libc := $(object-suffixes)
 747
 748 ifeq (yes,$(build-shared))
 749 # Build special library that contains the static-only routines for libc.
 750 object-suffixes-for-libc += .oS
 751
 752 # Must build the routines as PIC, though, because they can end up in (users')
 753 # shared objects.  We don't want to use CFLAGS-os because users may, for
 754 # example, make that processor-specific.
 755 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag)
 756 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
 757 libtype.oS = lib%_nonshared.a
 758 endif
 759
 760 # The assembler can generate debug information too.
 761 ifndef ASFLAGS
 762 ifeq ($(have-cpp-asm-debuginfo),yes)
 763 ASFLAGS := $(filter -g%,$(CFLAGS))
 764 else
 765 ASFLAGS :=
 766 endif
 767 endif
 768 ASFLAGS += $(ASFLAGS-config)
 769
 770 ifndef BUILD_CC
 771 BUILD_CC = $(CC)
 772 endif
 773
 774 move-if-change = $(SHELL) $(..)scripts/move-if-change
 775 \f
 776 -include $(common-objpfx)sysd-sorted
 777 subdirs = $(sorted-subdirs)
 778 subdir-srcdirs = $(foreach dir,$(subdirs),\
 779                            $(firstword $($(dir)-srcdir) $(..)$(dir)))
 780
 781 ifeq (yes, $(build-shared))
 782
 783 # This is a pair of implicit rules to preprocess a file with # comments,
 784 # %ifdef et al, based on config.h settings or other %include'd files.
 785 # We use chained rules instead of a pipeline here so that we can properly
 786 # check the exit status of cpp rather than using its bad output when there
 787 # is a preprocessing error.  Another rule should depend on the output file
 788 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
 789 # listing both its input files, and any header files that it may reference
 790 # (but no commands).
 791 %.v.i: $(common-objpfx)config.h
 792         sed '/^[        ]*#/d;s/^[      ]*%/#/' $(filter-out FORCE %.h,$^) \
 793         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
 794                    > $@T
 795         mv -f $@T $@
 796 %.v: %.v.i
 797         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
 798         mv -f $@T $@
 799
 800 # Process the shlib-versions file, which tells us what shared library
 801 # version numbers to use when we install shared objects on this system.
 802 # We need to wait until $(subdirs) is complete.
 803 ifeq ($(sysd-sorted-done),t)
 804 -include $(common-objpfx)soversions.mk
 805 ifndef avoid-generated
 806 # This lets add-ons give more-specific matches that override defaults
 807 # in the top-level file.
 808 $(common-objpfx)shlib-versions.v.i: \
 809         $(wildcard $(+sysdep_dirs:=/shlib-versions) \
 810                    $(subdir-srcdirs:=/shlib-versions)) \
 811         $(..)shlib-versions
 812
 813 soversions-default-setname = $(patsubst %, %,\
 814                                         $(filter-out %_default,\
 815                                                      $(oldest-abi:%=GLIBC_%)))
 816 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
 817                               $(common-objpfx)shlib-versions.v
 818         $(AWK) -v default_setname='$(soversions-default-setname)' \
 819                -v cpu='$(config-machine)' \
 820                -v vendor='$(config-vendor)' \
 821                -v os='$(config-os)' \
 822                -f $^ > $@T
 823         mv -f $@T $@
 824 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
 825         (seen_DEFAULT=0; seen_WORDSIZE32=0; seen_WORDSIZE64=0; \
 826          while read which lib number setname; do \
 827            eval seen_$$which=1; \
 828            test x"$$which" = xDEFAULT || continue; \
 829            case $$number in \
 830              [0-9]*) echo "$$lib.so-version=.$$number"; \
 831                      echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
 832              *)      echo "$$lib.so-version=$$number"; \
 833                      echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
 834            esac; \
 835          done; \
 836          case "$$seen_DEFAULT$$seen_WORDSIZE32$$seen_WORDSIZE64" in \
 837            100) echo biarch = no;; \
 838            101) echo biarch = 32;; \
 839            ?1?) echo biarch = 64;; \
 840            *) echo >&2 BUG; exit 2;; \
 841          esac; \
 842          echo soversions.mk-done = t;) < $< > $@T; exit 0
 843         mv -f $@T $@
 844 endif
 845 endif
 846
 847 postclean-generated += soversions.mk soversions.i \
 848                        shlib-versions.v shlib-versions.v.i
 849
 850 # Generate the header containing the names of all shared libraries.
 851 # We use a stamp file to avoid unnecessary recompilations.
 852 before-compile += $(common-objpfx)gnu/lib-names.h
 853 ifeq ($(soversions.mk-done),t)
 854 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp; @:
 855 $(common-objpfx)gnu/lib-names.stmp: $(..)scripts/lib-names.awk \
 856                                     $(common-objpfx)soversions.i
 857         $(make-target-directory)
 858         @rm -f ${@:stmp=T} $@
 859         LC_ALL=C $(AWK) -f $^ > ${@:stmp=T}
 860         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
 861         touch $@
 862 endif
 863
 864 common-generated += gnu/lib-names.h gnu/lib-names.stmp
 865
 866 # The name under which the run-time dynamic linker is installed.
 867 # We are currently going for the convention that `/lib/ld.so.1'
 868 # names the SVR4/ELF ABI-compliant dynamic linker.
 869 ifndef rtld-installed-name
 870 ifdef ld.so-version
 871 rtld-installed-name = $(ld.so-version)
 872 else
 873 rtld-installed-name = ld.so.1
 874 endif
 875 endif
 876
 877 ifndef rtld-version-installed-name
 878 rtld-version-installed-name = ld-$(version).so
 879 endif
 880
 881 endif # build-shared
 882
 883
 884 ifeq ($(elf),yes)
 885 dlfcn = dlfcn
 886 ifeq ($(build-shared),yes)
 887 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
 888 else
 889 libdl = $(common-objpfx)dlfcn/libdl.a
 890 endif
 891 else
 892 ifneq (,$(findstring aix,$(config-os)))
 893 ifeq ($(build-shared),yes)
 894 dlfcn = dlfcn
 895 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
 896 else
 897 # No libdl without shared libs on AIX
 898 dlfcn =
 899 libdl =
 900 endif
 901 else
 902 # No ELF, no AIX - no libdl, at least for now.
 903 dlfcn =
 904 libdl =
 905 endif
 906 endif
 907
 908 # These are the subdirectories containing the library source.  The order
 909 # is more or less arbitrary.  The sorting step will take care of the
 910 # dependencies.
 911 all-subdirs = csu assert ctype locale intl catgets math setjmp signal       \
 912               stdlib stdio-common libio malloc string wcsmbs time dirent    \
 913               grp pwd posix io termios resource misc socket sysvipc gmon    \
 914               gnulib iconv iconvdata wctype manual shadow po argp           \
 915               crypt nss localedata timezone rt conform debug                \
 916               $(add-on-subdirs) $(dlfcn) $(binfmt-subdir)
 917
 918 ifndef avoid-generated
 919 all-Depend-files := $(wildcard $(foreach dir,$(all-subdirs),\
 920                                          $(firstword $($(dir)-srcdir) \
 921                                                      $(..)$(dir))/Depend))
 922 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
 923                              $(common-objpfx)config.make $(..)Makeconfig \
 924                              $(wildcard $(sysdirs:=/Subdirs)) \
 925                              $(all-Depend-files)
 926         $(AWK) -f $< \
 927                -v subdirs='$(all-subdirs)' \
 928                -v srcpfx='$(..)' \
 929                $(filter %/Subdirs %/Depend,$^) > $@-tmp
 930         mv -f $@-tmp $@
 931 $(all-Depend-files): ;
 932 endif
 933
 934 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
 935 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
 936 ifneq (,$(sysdep-makeconfigs))
 937 include $(sysdep-makeconfigs)
 938 endif
 939
 940
 941 endif # Makeconfig not yet included
 942
 943 # Local Variables:
 944 # mode: makefile
 945 # End: