Makeconfig

   1 # Copyright (C) 1991-2003,2004,2005,2006,2007,2008,2009,2010,2011,2012
   2 #       Free Software Foundation, Inc.
   3 # This file is part of the GNU C Library.
   4
   5 # The GNU C Library is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU Lesser General Public
   7 # License as published by the Free Software Foundation; either
   8 # version 2.1 of the License, or (at your option) any later version.
   9
  10 # The GNU C Library is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # Lesser General Public License for more details.
  14
  15 # You should have received a copy of the GNU Lesser General Public
  16 # License along with the GNU C Library; if not, see
  17 # <http://www.gnu.org/licenses/>.
  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 # Complete path to sysdep dirs.
  93 # `configure' writes a definition of `config-sysdirs' in `config.make'.
  94 sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
  95
  96 # Add-ons that contribute sysdeps trees get added to the include list
  97 # after sysdeps/generic.  This makes #include <sysdeps/...> work right
  98 # to find specific add-on files without assuming the add-on directory name.
  99 # It also means that headers can go into an add-on's base directory
 100 # instead of the add-on needing a sysdeps/generic of its own.
 101 sysdeps-srcdirs := $(foreach add-on,$(sysdeps-add-ons),\
 102                              $(firstword $(filter /%,$(add-on)) \
 103                                          $(..)$(add-on)))
 104 +sysdep_dirs = $(sysdirs) $(sysdeps-srcdirs)
 105 ifdef objdir
 106 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
 107 endif
 108
 109 # Run config.status to update config.make and config.h.  We don't show the
 110 # dependence of config.h to Make, because it is only touched when it
 111 # changes and so config.status would be run every time; the dependence of
 112 # config.make should suffice to force regeneration and re-exec, and the new
 113 # image will notice if config.h changed.
 114 $(common-objpfx)config.make: $(common-objpfx)config.status \
 115                              $(..)config.make.in $(..)config.h.in
 116         cd $(<D); $(SHELL) $(<F)
 117
 118 # Find all the add-on and sysdeps configure fragments, to make sure we
 119 # re-run configure when any of them changes.
 120 $(common-objpfx)config.status: $(..)version.h $(..)configure \
 121                                $(foreach dir,$(sysdirs),\
 122                                          $(wildcard $(dir)/Implies) \
 123                                          $(patsubst %.in,%,\
 124                                                     $(firstword $(wildcard \
 125  $(addprefix $(dir)/,configure configure.in))))) \
 126                                $(patsubst %.in,%,\
 127                                           $(foreach add-on,$(add-ons),\
 128                                                     $(firstword $(wildcard \
 129  $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
 130              configure configure.in)))))
 131         @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
 132          echo The GNU C library has not been configured. >&2; \
 133          echo Run \`configure\' to configure it before building. >&2; \
 134          echo Try \`configure --help\' for more details. >&2; \
 135          exit 1; fi
 136
 137 # We don't want CPPFLAGS to be exported to the command running configure.
 138 unexport CPPFLAGS
 139
 140 # Get the user's configuration parameters.
 141 ifneq ($(wildcard $(..)configparms),)
 142 include $(..)configparms
 143 endif
 144 ifneq ($(objpfx),)
 145 ifneq ($(wildcard $(common-objpfx)configparms),)
 146 include $(common-objpfx)configparms
 147 endif
 148 endif
 149 \f
 150 ####
 151 ####    These are the configuration variables.  You can define values for
 152 ####    the variables below in the file `configparms'.
 153 ####    Do NOT edit this file.
 154 ####
 155
 156
 157 # Common prefix for machine-independent installation directories.
 158 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
 159 prefix = /usr/local
 160 endif
 161
 162 # Decide whether we shall build the programs or not.  We always do this
 163 # unless the user tells us (in configparms) or we are building for a
 164 # standalone target.
 165 ifndef build-programs
 166 ifneq ($(config-os),none)
 167 build-programs=yes
 168 else
 169 build-programs=no
 170 endif
 171 endif
 172
 173 # Common prefix for machine-dependent installation directories.
 174 ifeq ($(origin exec_prefix),undefined)
 175 exec_prefix = $(prefix)
 176 endif
 177
 178 # Where to install the library and object files.
 179 ifndef libdir
 180 libdir = $(exec_prefix)/lib
 181 endif
 182 inst_libdir = $(install_root)$(libdir)
 183
 184 # Where to install the shared library and dynamic linker.
 185 ifndef slibdir
 186 slibdir = $(exec_prefix)/lib
 187 endif
 188 inst_slibdir = $(install_root)$(slibdir)
 189
 190 # Prefix to put on files installed in $(libdir).  For libraries `libNAME.a',
 191 # the prefix is spliced between `lib' and the name, so the linker switch
 192 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
 193 # just prepended to the whole file name.
 194 ifeq ($(origin libprefix),undefined)
 195 libprefix =
 196 endif
 197
 198 # Where to install the header files.
 199 ifndef includedir
 200 includedir = $(prefix)/include
 201 endif
 202 inst_includedir = $(install_root)$(includedir)
 203
 204 # Where to install machine-independent data files.
 205 # These are the timezone database, and the locale database.
 206 ifndef datadir
 207 datadir = $(prefix)/share
 208 endif
 209 inst_datadir = $(install_root)$(datadir)
 210
 211 # Where to install the timezone data files (which are machine-independent).
 212 ifndef zonedir
 213 zonedir = $(datadir)/zoneinfo
 214 endif
 215 inst_zonedir = $(install_root)$(zonedir)
 216
 217 # Where to install the locale files.
 218 ifndef localedir
 219 localedir = $(libdir)/locale
 220 endif
 221 inst_localedir = $(install_root)$(localedir)
 222
 223 # Where to install the message catalog data files (which are
 224 # machine-independent).
 225 ifndef msgcatdir
 226 msgcatdir = $(datadir)/locale
 227 endif
 228 inst_msgcatdir = $(install_root)$(msgcatdir)
 229
 230 # Where to install the locale charmap source files.
 231 ifndef i18ndir
 232 i18ndir = $(datadir)/i18n
 233 endif
 234 inst_i18ndir = $(install_root)$(i18ndir)
 235
 236 # Where to install the shared object for charset transformation.
 237 ifndef gconvdir
 238 gconvdir = $(libdir)/gconv
 239 endif
 240 inst_gconvdir = $(install_root)$(gconvdir)
 241
 242 # Where to install programs.
 243 ifndef bindir
 244 bindir = $(exec_prefix)/bin
 245 endif
 246 inst_bindir = $(install_root)$(bindir)
 247
 248 # Where to install internal programs.
 249 ifndef libexecdir
 250 libexecdir = $(exec_prefix)/libexec
 251 endif
 252 inst_libexecdir = $(install_root)$(libexecdir)
 253
 254 # Where to install administrative programs.
 255 ifndef rootsbindir
 256 rootsbindir = $(exec_prefix)/sbin
 257 endif
 258 inst_rootsbindir = $(install_root)$(rootsbindir)
 259
 260 ifndef sbindir
 261 sbindir = $(exec_prefix)/sbin
 262 endif
 263 inst_sbindir = $(install_root)$(sbindir)
 264
 265 # Where to install the Info files.
 266 ifndef infodir
 267 infodir = $(prefix)/info
 268 endif
 269 inst_infodir = $(install_root)$(infodir)
 270
 271 # Where to install audit libraries.
 272 ifndef auditdir
 273 auditdir = $(libdir)/audit
 274 endif
 275 inst_auditdir = $(install_root)$(auditdir)
 276
 277 # Where to install default configuration files.  These include the local
 278 # timezone specification and network data base files.
 279 ifndef sysconfdir
 280 sysconfdir = $(prefix)/etc
 281 endif
 282 inst_sysconfdir = $(install_root)$(sysconfdir)
 283
 284 # Directory for the database files and Makefile for nss_db.
 285 ifndef vardbdir
 286 vardbdir = $(localstatedir)/db
 287 endif
 288 inst_vardbdir = $(install_root)$(vardbdir)
 289
 290 # Where to install the "localtime" timezone file; this is the file whose
 291 # contents $(localtime) specifies.  If this is a relative pathname, it is
 292 # relative to $(zonedir).  It is a good idea to put this somewhere
 293 # other than there, so the zoneinfo directory contains only universal data,
 294 # localizing the configuration data elsewhere.
 295 ifndef localtime-file
 296 localtime-file = $(sysconfdir)/localtime
 297 endif
 298
 299 # What to use for leap second specifications in compiling the default
 300 # timezone files.  Set this to `/dev/null' for no leap second handling as
 301 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
 302 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
 303 # This variable determines the default: if it's `/dev/null',
 304 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
 305 ifndef leapseconds
 306 leapseconds = /dev/null
 307 endif
 308
 309 # What timezone's DST rules should be used when a POSIX-style TZ
 310 # environment variable doesn't specify any rules.  For 1003.1 compliance
 311 # this timezone must use rules that are as U.S. federal law defines DST.
 312 # Run `make -C time echo-zonenames' to see a list of available zone names.
 313 # This setting can be changed with `zic -p TIMEZONE' at any time.
 314 # If you want POSIX.1 compatibility, use `America/New_York'.
 315 ifndef posixrules
 316 posixrules = America/New_York
 317 endif
 318
 319 # Where to install the "posixrules" timezone file; this is file
 320 # whose contents $(posixrules) specifies.  If this is a relative
 321 # pathname, it is relative to $(zonedir).
 322 ifndef posixrules-file
 323 posixrules-file = posixrules
 324 endif
 325
 326
 327 # Directory where your system's native header files live.
 328 # This is used on Unix systems to generate some GNU libc header files.
 329 ifndef sysincludedir
 330 sysincludedir = /usr/include
 331 endif
 332
 333
 334 # Commands to install files.
 335 ifndef INSTALL_DATA
 336 INSTALL_DATA = $(INSTALL) -m 644
 337 endif
 338 ifndef INSTALL_SCRIPT
 339 INSTALL_SCRIPT = $(INSTALL)
 340 endif
 341 ifndef INSTALL_PROGRAM
 342 INSTALL_PROGRAM = $(INSTALL)
 343 endif
 344 ifndef INSTALL
 345 INSTALL = install
 346 endif
 347
 348
 349 # The name of the C compiler.
 350 # If you've got GCC, and it works, use it.
 351 ifeq ($(origin CC),default)
 352 CC := gcc
 353 endif
 354
 355 # The name of the C compiler to use for compilations of programs to run on
 356 # the host that is building the library.  If you set CC to a
 357 # cross-compiler, you must set this to the normal compiler.
 358 ifndef BUILD_CC
 359 BUILD_CC = $(CC)
 360 endif
 361
 362 # Default flags to pass the C compiler.
 363 ifndef default_cflags
 364 ifeq ($(release),stable)
 365 default_cflags := -g -O2
 366 else
 367 default_cflags := -g -O
 368 endif
 369 endif
 370
 371 # Flags to pass the C compiler when assembling preprocessed assembly code
 372 # (`.S' files).  On some systems the assembler doesn't understand the `#' line
 373 # directives the preprocessor produces.  If you have troubling compiling
 374 # assembly code, try using -P here to suppress these directives.
 375 ifndef asm-CPPFLAGS
 376 asm-CPPFLAGS =
 377 endif
 378
 379 as-needed := -Wl,--as-needed
 380 no-as-needed := -Wl,--no-as-needed
 381
 382 # Must be supported by the linker.
 383 no-whole-archive = -Wl,--no-whole-archive
 384 whole-archive = -Wl,--whole-archive
 385
 386 # Installed name of the startup code.
 387 # The ELF convention is that the startfile is called crt1.o
 388 start-installed-name = crt1.o
 389 # On systems that do not need a special startfile for statically linked
 390 # binaries, simply set it to the normal name.
 391 ifndef static-start-installed-name
 392 static-start-installed-name = $(start-installed-name)
 393 endif
 394
 395 ifeq (yesyes,$(build-shared)$(have-z-combreloc))
 396 combreloc-LDFLAGS = -Wl,-z,combreloc
 397 LDFLAGS.so += $(combreloc-LDFLAGS)
 398 LDFLAGS-rtld += $(combreloc-LDFLAGS)
 399 endif
 400
 401 relro-LDFLAGS = -Wl,-z,relro
 402 LDFLAGS.so += $(relro-LDFLAGS)
 403 LDFLAGS-rtld += $(relro-LDFLAGS)
 404
 405 ifeq (yes,$(have-hash-style))
 406 # For the time being we unconditionally use 'both'.  At some time we
 407 # should declare statically linked code as 'out of luck' and compile
 408 # with --hash-style=gnu only.
 409 hashstyle-LDFLAGS = -Wl,--hash-style=both
 410 LDFLAGS.so += $(hashstyle-LDFLAGS)
 411 LDFLAGS-rtld += $(hashstyle-LDFLAGS)
 412 endif
 413
 414 # Command for linking PIE programs with the C library.
 415 ifndef +link-pie
 416 +link-pie = $(CC) -pie -Wl,-O1 -nostdlib -nostartfiles -o $@ \
 417              $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 418              $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 419              $(addprefix $(csu-objpfx),S$(start-installed-name)) \
 420              $(+preinit) $(+prectorS) \
 421              $(filter-out $(addprefix $(csu-objpfx),start.o \
 422                                                     S$(start-installed-name))\
 423                           $(+preinit) $(link-extra-libs) \
 424                           $(common-objpfx)libc% $(+postinit),$^) \
 425              $(link-extra-libs) $(link-libc) $(+postctorS) $(+postinit)
 426 endif
 427 # Command for statically linking programs with the C library.
 428 ifndef +link-static
 429 +link-static-before-libc = $(CC) -nostdlib -nostartfiles -static -o $@ \
 430               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F))  \
 431               $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
 432               $(+preinit) $(+prectorT) \
 433               $(filter-out $(addprefix $(csu-objpfx),start.o \
 434                                                      $(start-installed-name))\
 435                            $(+preinit) $(link-extra-libs-static) \
 436                            $(common-objpfx)libc% $(+postinit),$^) \
 437               $(link-extra-libs-static)
 438 +link-static-after-libc = $(+postctorT) $(+postinit)
 439 +link-static = $(+link-static-before-libc) $(link-libc-static) \
 440                $(+link-static-after-libc)
 441 +link-static-tests = $(+link-static-before-libc) $(link-libc-static-tests) \
 442                      $(+link-static-after-libc)
 443 endif
 444 # Commands for linking programs with the C library.
 445 ifndef +link
 446 ifeq (yes,$(build-shared))
 447 +link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \
 448               $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 449               $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 450               $(addprefix $(csu-objpfx),$(start-installed-name)) \
 451               $(+preinit) $(+prector) \
 452               $(filter-out $(addprefix $(csu-objpfx),start.o \
 453                                                      $(start-installed-name))\
 454                            $(+preinit) $(link-extra-libs) \
 455                            $(common-objpfx)libc% $(+postinit),$^) \
 456               $(link-extra-libs)
 457 +link-after-libc = $(+postctor) $(+postinit)
 458 +link = $(+link-before-libc) $(link-libc) $(+link-after-libc)
 459 +link-tests = $(+link-before-libc) $(link-libc-tests) $(+link-after-libc)
 460 else
 461 +link = $(+link-static)
 462 +link-tests = $(+link-static-tests)
 463 endif
 464 endif
 465 # Command for statically linking bounded-pointer programs with the C library.
 466 ifndef +link-bounded
 467 +link-bounded = $(CC) -nostdlib -nostartfiles -static -fbounded-pointers -o $@ \
 468               $(sysdep-LDFLAGS) $(LDFLAGS)  \
 469               $(addprefix $(csu-objpfx),b$(static-start-installed-name)) \
 470               $(+preinit) $(+prectorT) \
 471               $(filter-out $(addprefix $(csu-objpfx),start.ob \
 472                                                      $(start-installed-name))\
 473                            $(+preinit) $(link-extra-libs-bounded) \
 474                            $(common-objpfx)libc% $(+postinit),$^) \
 475               $(link-extra-libs-bounded) $(link-libc-bounded) $(+postctorT) $(+postinit)
 476 endif
 477 ifndef config-LDFLAGS
 478 ifeq (yes,$(build-shared))
 479 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
 480 endif
 481 endif
 482 ifndef link-libc
 483 ifeq (yes,$(build-shared))
 484 # We need the versioned name of libc.so in the deps of $(others) et al
 485 # so that the symlink to libc.so is created before anything tries to
 486 # run the linked programs.
 487 link-libc-before-gnulib = -Wl,-rpath-link=$(rpath-link) \
 488             $(common-objpfx)libc.so$(libc.so-version) \
 489             $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
 490             $(as-needed) $(common-objpfx)elf/ld.so $(no-as-needed)
 491 link-libc = $(link-libc-before-gnulib) $(gnulib)
 492 link-libc-tests = $(link-libc-before-gnulib) $(gnulib-tests)
 493 # This is how to find at build-time things that will be installed there.
 494 rpath-dirs = math elf dlfcn nss nis rt resolv crypt
 495 rpath-link = \
 496 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
 497 else
 498 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
 499 link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
 500 endif
 501 endif
 502
 503 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
 504
 505 # Differences in the linkers on the various platforms.
 506 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
 507 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
 508 LDFLAGS-rdynamic = -rdynamic
 509 LDFLAGS-Bsymbolic = -Bsymbolic
 510
 511 # Choose the default search path for the dynamic linker based on
 512 # where we will install libraries.
 513 ifneq ($(libdir),$(slibdir))
 514 default-rpath = $(slibdir):$(libdir)
 515 else
 516 default-rpath = $(libdir)
 517 endif
 518
 519 ifndef link-extra-libs
 520 link-extra-libs = $(LDLIBS-$(@F))
 521 link-extra-libs-static = $(link-extra-libs)
 522 link-extra-libs-bounded = $(link-extra-libs)
 523 endif
 524
 525 # The static libraries.
 526 link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
 527 link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
 528 link-libc-bounded = $(common-objpfx)libc_b.a $(gnulib) $(common-objpfx)libc_b.a
 529
 530 # How to link against libgcc.  Some libgcc functions, such as those
 531 # for "long long" arithmetic or software floating point, can always be
 532 # built without use of C library headers and do not have any global
 533 # state so can safely be linked statically into any executable or
 534 # shared library requiring them; these functions are in libgcc.a.
 535 # Other functions, relating to exception handling, may require C
 536 # library headers to build and it may not be safe to have more than
 537 # one copy of them in a process; these functions are only in
 538 # libgcc_s.so and libgcc_eh.a.
 539 #
 540 # To avoid circular dependencies when bootstrapping, it is desirable
 541 # to avoid use of libgcc_s and libgcc_eh in building glibc.  Where any
 542 # glibc functionality (in particular, thread cancellation) requires
 543 # exception handling, this is implemented through dlopen of libgcc_s
 544 # to avoid unnecessary dependencies on libgcc_s by programs not using
 545 # that functionality; executables built with glibc do not use
 546 # exception handling other than through thread cancellation.
 547 #
 548 # Undefined references to functions from libgcc_eh or libgcc_s may
 549 # arise for code built with -fexceptions.  In the case of statically
 550 # linked programs installed by glibc, unwinding will never actually
 551 # occur at runtime and the use of elf/static-stubs.c to resolve these
 552 # references is safe.  In the case of statically linked test programs
 553 # and test programs built with -fexceptions, unwinding may occur in
 554 # some cases and it is preferable to link with libgcc_eh or libgcc_s
 555 # so that the testing is as similar as possible to how programs will
 556 # be built with the installed glibc.
 557 #
 558 # Some architectures have architecture-specific systems for exception
 559 # handling that may involve undefined references to
 560 # architecture-specific functions.  On those architectures,
 561 # gnulib-arch and static-gnulib-arch may be defined in sysdeps
 562 # makefiles to use additional libraries for linking executables and
 563 # shared libraries built by glibc.
 564 ifndef gnulib
 565 ifneq ($(have-cc-with-libunwind),yes)
 566   libunwind =
 567 else
 568   libunwind = -lunwind
 569 endif
 570 libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
 571 gnulib-arch =
 572 gnulib = -lgcc $(gnulib-arch)
 573 gnulib-tests := -lgcc $(libgcc_eh)
 574 static-gnulib-arch =
 575 # By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
 576 # statically link programs.  When --disable-shared is used, we use
 577 # -lgcc_eh since elf/static-stubs.o isn't sufficient.
 578 ifeq (yes,$(build-shared))
 579 static-gnulib = -lgcc $(static-gnulib-arch)
 580 else
 581 static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
 582 endif
 583 static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
 584 libc.so-gnulib := -lgcc
 585 endif
 586 +preinit = $(addprefix $(csu-objpfx),crti.o)
 587 +postinit = $(addprefix $(csu-objpfx),crtn.o)
 588 +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
 589 +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 590 # Variants of the two previous definitions for linking PIE programs.
 591 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
 592 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
 593 # Variants of the two previous definitions for statically linking programs.
 594 +prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
 595 +postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 596 +interp = $(addprefix $(elf-objpfx),interp.os)
 597 csu-objpfx = $(common-objpfx)csu/
 598 elf-objpfx = $(common-objpfx)elf/
 599
 600 # How to run a program we just linked with our library.
 601 # The program binary is assumed to be $(word 2,$^).
 602 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
 603 ifeq (yes,$(build-shared))
 604 comma = ,
 605 sysdep-library-path = \
 606 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
 607                                        $(filter -Wl$(comma)-rpath-link=%,\
 608                                                 $(sysdep-LDFLAGS)))))
 609 run-program-prefix = $(if $(filter $(notdir $(built-program-file)),\
 610                                    $(tests-static) $(xtests-static)),, \
 611                           $(elf-objpfx)$(rtld-installed-name) \
 612                           --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)))
 613 else
 614 run-program-prefix =
 615 endif
 616 # Never use $(run-program-prefix) for the statically-linked %-bp test programs
 617 built-program-cmd = $(patsubst %,$(run-program-prefix),\
 618                         $(filter-out %-bp,$(built-program-file))) \
 619                     $(built-program-file)
 620
 621 ifndef LD
 622 LD := ld -X
 623 endif
 624
 625 # Extra flags to pass to GCC.
 626 ifeq ($(all-warnings),yes)
 627 +gccwarn := -Wall -Wwrite-strings -Winline -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
 628 else
 629 +gccwarn := -Wall -Wwrite-strings -Winline
 630 endif
 631 +gccwarn-c = -Wstrict-prototypes
 632
 633 # We do not depend on the address of constants in different files to be
 634 # actually different, so allow the compiler to merge them all.
 635 +merge-constants = -fmerge-all-constants
 636
 637 # We have to assume that glibc functions are called in any rounding
 638 # mode and also change the rounding mode in a few functions. So,
 639 # disable any optimization that assume default rounding mode.
 640 +math-flags = -frounding-math
 641
 642 # This is the program that generates makefile dependencies from C source files.
 643 # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
 644 # targets for headers so that removed headers don't break the build.
 645 ifndef +mkdep
 646 +mkdep = $(CC) -M -MP
 647 endif
 648
 649 # The program that makes Emacs-style TAGS files.
 650 ETAGS   := etags
 651
 652 # The `xgettext' program for producing .pot files from sources.
 653 ifndef XGETTEXT
 654 XGETTEXT = xgettext
 655 endif
 656
 657 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
 658 # perhaps others) to preprocess assembly code in some cases.
 659 M4 = m4
 660
 661 # To force installation of files even if they are older than the
 662 # installed files.  This variable is included in the dependency list
 663 # of all installation targets.
 664 ifeq ($(force-install),yes)
 665 +force = force-install
 666 else
 667 +force =
 668 endif
 669
 670 ####
 671 #### End of configuration variables.
 672 ####
 673 \f
 674 # This tells some versions of GNU make before 3.63 not to export all variables.
 675 .NOEXPORT:
 676
 677 # We want to echo the commands we're running without
 678 # umpteen zillion filenames along with it (we use `...' instead)
 679 # but we don't want this echoing done when the user has said
 680 # he doesn't want to see commands echoed by using -s.
 681 ifneq   "$(findstring s,$(MAKEFLAGS))" ""       # if -s
 682 +cmdecho        := echo >/dev/null
 683 else                                            # not -s
 684 +cmdecho        := echo
 685 endif                                           # -s
 686
 687 # These are the flags given to the compiler to tell
 688 # it what sort of optimization and/or debugging output to do.
 689 ifndef  +cflags
 690 # If `CFLAGS' was defined, use that.
 691 ifdef           CFLAGS
 692 +cflags := $(filter-out -I%,$(CFLAGS))
 693 endif           # CFLAGS
 694 endif   # +cflags
 695
 696 # If none of the above worked, default to "-g -O".
 697 ifeq    "$(strip $(+cflags))" ""
 698 +cflags := $(default_cflags)
 699 endif   # $(+cflags) == ""
 700
 701 +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags)
 702 +gcc-nowarn := -w
 703
 704 # Don't duplicate options if we inherited variables from the parent.
 705 +cflags := $(sort $(+cflags))
 706
 707 # These are flags given to the C compiler to tell it to look for
 708 # include files (including ones given in angle brackets) in the parent
 709 # library source directory, in the include directory, and in the
 710 # current directory.
 711 +sysdep-includes = $(addprefix -I,$(+sysdep_dirs))
 712 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
 713             $(+sysdep-includes) $(includes) \
 714             $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
 715
 716 # Since libio has several internal header files, we use a -I instead
 717 # of many little headers in the include directory.
 718 libio-include = -I$(..)libio
 719
 720 # These are the variables that the implicit compilation rules use.
 721 # Note that we can't use -std=* in CPPFLAGS, because it overrides
 722 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
 723 # it causes cpp to stop predefining __ASSEMBLER__.
 724 CPPFLAGS = $(CPPUNDEFS) $(CPPFLAGS-config) $($(subdir)-CPPFLAGS) \
 725            $(+includes) $(defines) \
 726            -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
 727            $(CPPFLAGS-$(suffix $@)) \
 728            $(foreach lib,$(libof-$(basename $(@F))) \
 729                          $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
 730            $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
 731 override CFLAGS = -std=gnu99 $(gnu89-inline-CFLAGS) $(config-extra-cflags) \
 732                   $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
 733                   $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
 734                   $(CFLAGS-$(@F)) \
 735                   $(foreach lib,$(libof-$(basename $(@F))) \
 736                                 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
 737 override CXXFLAGS = $(c++-sysincludes) \
 738                     $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
 739                     $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
 740
 741 # If everything is compiled with -fPIC (implicitly) we must tell this by
 742 # defining the PIC symbol.
 743 ifeq (yes,$(build-pic-default))
 744 pic-default = -DPIC
 745 endif
 746
 747 # Enable object files for different versions of the library.
 748 # Various things use $(object-suffixes) to know what all to make.
 749 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
 750 # to pass different flags for each flavor.
 751 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
 752 all-object-suffixes := .o .os .op .og .ob .oS
 753 object-suffixes :=
 754 CPPFLAGS-.o = $(pic-default)
 755 CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
 756 libtype.o := lib%.a
 757 object-suffixes += .o
 758 ifeq (yes,$(build-shared))
 759 # Under --enable-shared, we will build a shared library of PIC objects.
 760 # The PIC object files are named foo.os.
 761 object-suffixes += .os
 762 CPPFLAGS-.os = -DPIC -DSHARED
 763 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
 764 libtype.os := lib%_pic.a
 765 # This can be changed by a sysdep makefile
 766 pic-ccflag = -fPIC
 767 # This one should always stay like this unless there is a very good reason.
 768 PIC-ccflag = -fPIC
 769 endif
 770 # This can be changed by a sysdep makefile
 771 pie-ccflag = -fpie
 772 # This one should always stay like this unless there is a very good reason.
 773 PIE-ccflag = -fPIE
 774 ifeq (yes,$(build-profile))
 775 # Under --enable-profile, we will build a static library of profiled objects.
 776 # The profiled object files are named foo.op.
 777 object-suffixes += .op
 778 CPPFLAGS-.op = -DPROF $(pic-default)
 779 CFLAGS-.op = -pg
 780 libtype.op = lib%_p.a
 781 endif
 782
 783 # Convenience variable for when we want to treat shared-library cases
 784 # differently from the rest.
 785 object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
 786
 787 bppfx = BP-
 788 ifeq (yes,$(build-bounded))
 789 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
 790 # to runtime bounds checking.  The bounded-pointer objects are named foo.ob.
 791 # We disable sibling-call optimizations so that stack traces will be complete
 792 # and thus aid debugging, since after all, BPs are a debugging tool.
 793 object-suffixes += .ob
 794 CPPFLAGS-.ob = -fbounded-pointers $(pic-default)
 795 CFLAGS-.ob = -g -O2 -fno-optimize-sibling-calls -fno-strict-aliasing
 796 libtype.ob = lib%_b.a
 797 endif
 798
 799 object-suffixes-for-libc := $(object-suffixes)
 800
 801 ifeq (yes,$(build-shared))
 802 # Build special library that contains the static-only routines for libc.
 803 object-suffixes-for-libc += .oS
 804
 805 # Must build the routines as PIC, though, because they can end up in (users')
 806 # shared objects.  We don't want to use CFLAGS-os because users may, for
 807 # example, make that processor-specific.
 808 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag)
 809 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
 810 libtype.oS = lib%_nonshared.a
 811 endif
 812
 813 # The assembler can generate debug information too.
 814 ifndef ASFLAGS
 815 ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
 816 endif
 817 ASFLAGS += $(ASFLAGS-config) $(asflags-cpu)
 818
 819 ifndef BUILD_CC
 820 BUILD_CC = $(CC)
 821 endif
 822
 823 move-if-change = $(SHELL) $(..)scripts/move-if-change
 824 \f
 825 -include $(common-objpfx)sysd-sorted
 826 subdirs = $(sorted-subdirs)
 827 subdir-srcdirs = $(foreach dir,$(subdirs),\
 828                            $(firstword $($(dir)-srcdir) $(..)$(dir)))
 829
 830 ifeq (yes, $(build-shared))
 831
 832 # This is a pair of implicit rules to preprocess a file with # comments,
 833 # %ifdef et al, based on config.h settings or other %include'd files.
 834 # We use chained rules instead of a pipeline here so that we can properly
 835 # check the exit status of cpp rather than using its bad output when there
 836 # is a preprocessing error.  Another rule should depend on the output file
 837 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
 838 # listing both its input files, and any header files that it may reference
 839 # (but no commands).
 840 %.v.i: $(common-objpfx)config.h $(..)Makeconfig
 841         sed '/^[        ]*%/!s/#.*$$//;/^[      ]*$$/d;s/^[     ]*%/#/' \
 842             $(filter-out FORCE %.h $(..)Makeconfig,$^) \
 843         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
 844                    > $@T
 845         mv -f $@T $@
 846 %.v: %.v.i
 847         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
 848         mv -f $@T $@
 849
 850 # To generate a header to support more than one ABI for different
 851 # architecture variants, the CPU/Makefile defines abi-variants to be a
 852 # list of names for those variants (e.g. 32 64), and, for each variant,
 853 # defines abi-$(variant)-condition to be the condition for those options
 854 # to use in a C #if condition.  abi-includes may be defined to a list of
 855 # headers to include in the generated header, if the default does not
 856 # suffice.  default-abi is defined to be the ABI for the current glibc
 857 # build.
 858
 859 ifndef abi-includes
 860 abi-includes := bits/wordsize.h
 861 endif
 862
 863 # Process the shlib-versions file, which tells us what shared library
 864 # version numbers to use when we install shared objects on this system.
 865 # We need to wait until $(subdirs) is complete.
 866 ifeq ($(sysd-sorted-done),t)
 867 -include $(common-objpfx)soversions.mk
 868 ifndef avoid-generated
 869 # This lets add-ons give more-specific matches that override defaults
 870 # in the top-level file.
 871 $(common-objpfx)shlib-versions.v.i: \
 872         $(wildcard $(+sysdep_dirs:=/shlib-versions) \
 873                    $(subdir-srcdirs:=/shlib-versions)) \
 874         $(..)shlib-versions
 875
 876 soversions-default-setname = $(patsubst %, %,\
 877                                         $(filter-out %_default,\
 878                                                      $(oldest-abi:%=GLIBC_%)))
 879 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
 880                               $(common-objpfx)shlib-versions.v
 881         $(AWK) -v default_setname='$(soversions-default-setname)' \
 882                -v cpu='$(config-machine)' \
 883                -v vendor='$(config-vendor)' \
 884                -v os='$(config-os)' \
 885                -f $^ > $@T
 886         mv -f $@T $@
 887 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
 888         (while read which lib number setname; do \
 889            eval seen_$$which=1; \
 890            test x"$$which" != xABI || echo abi-name = "$$lib"; \
 891            test x"$$which" = xDEFAULT || continue; \
 892            case $$number in \
 893              [0-9]*) echo "$$lib.so-version=.$$number"; \
 894                      echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
 895              *)      echo "$$lib.so-version=\$$(if \$$(abi-$(default-abi)-$$lib-soname),\$$(abi-$(default-abi)-$$lib-soname),$$number)"; \
 896                      echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
 897            esac; \
 898          done; \
 899          echo soversions.mk-done = t;) < $< > $@T; exit 0
 900         mv -f $@T $@
 901 endif
 902 endif
 903
 904 postclean-generated += soversions.mk soversions.i \
 905                        shlib-versions.v shlib-versions.v.i
 906
 907 # Generate the header containing the names of all shared libraries.
 908 # We use a stamp file to avoid unnecessary recompilations.
 909 before-compile += $(common-objpfx)gnu/lib-names.h
 910 ifeq ($(soversions.mk-done),t)
 911 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp; @:
 912 $(common-objpfx)gnu/lib-names.stmp: $(..)scripts/lib-names.awk \
 913                                     $(common-objpfx)soversions.i
 914         $(make-target-directory)
 915         { \
 916          echo '/* This file is automatically generated.';\
 917          echo '   It defines macros to allow user program to find the shared'; \
 918          echo '   library files which come as part of GNU libc.  */'; \
 919          echo '#ifndef __GNU_LIB_NAMES_H'; \
 920          echo '#define __GNU_LIB_NAMES_H        1'; \
 921          echo ''; \
 922          $(if $(abi-includes), \
 923           $(foreach h,$(abi-includes), echo '#include <$(h)>';) \
 924           echo '';) \
 925          $(if $(abi-variants), \
 926          $(foreach v,$(abi-variants),\
 927          $(if $(abi-$(v)-condition),\
 928          echo '#if $(abi-$(v)-condition)'; \
 929          ($(foreach s,$(all-sonames), \
 930            $(if $(abi-$(v)-$(firstword $(subst =, ,$(s)))-soname),\
 931              echo $(firstword $(subst =, ,$(s)))=$(abi-$(v)-$(firstword $(subst =, ,$(s)))-soname);, \
 932              echo $(s);))) \
 933          | LC_ALL=C $(AWK) -v multi=1 -f $(firstword $^) | LC_ALL=C sort;) \
 934          $(if $(abi-$(v)-condition),echo '#endif';)), \
 935          ($(foreach s,$(all-sonames), echo $(s);)) \
 936          | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort;) \
 937          echo ''; \
 938          echo '#endif   /* gnu/lib-names.h */'; \
 939         } >  ${@:stmp=T}
 940         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
 941         touch $@
 942 endif
 943
 944 common-generated += gnu/lib-names.h gnu/lib-names.stmp
 945
 946 # The name under which the run-time dynamic linker is installed.
 947 # We are currently going for the convention that `/lib/ld.so.1'
 948 # names the SVR4/ELF ABI-compliant dynamic linker.
 949 ifndef rtld-installed-name
 950 ifdef ld.so-version
 951 rtld-installed-name = $(ld.so-version)
 952 else
 953 rtld-installed-name = ld.so.1
 954 endif
 955 endif
 956
 957 ifndef rtld-version-installed-name
 958 rtld-version-installed-name = ld-$(version).so
 959 endif
 960
 961 endif # build-shared
 962
 963
 964 ifeq ($(build-shared),yes)
 965 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
 966 else
 967 libdl = $(common-objpfx)dlfcn/libdl.a
 968 endif
 969
 970 ifeq ($(build-shared),yes)
 971 libm = $(common-objpfx)math/libm.so$(libm.so-version)
 972 else
 973 libm = $(common-objpfx)math/libm.a
 974 endif
 975
 976 # These are the subdirectories containing the library source.  The order
 977 # is more or less arbitrary.  The sorting step will take care of the
 978 # dependencies.
 979 all-subdirs = csu assert ctype locale intl catgets math setjmp signal       \
 980               stdlib stdio-common libio malloc string wcsmbs time dirent    \
 981               grp pwd posix io termios resource misc socket sysvipc gmon    \
 982               gnulib iconv iconvdata wctype manual shadow gshadow po argp   \
 983               crypt nss localedata timezone rt conform debug                \
 984               $(add-on-subdirs) dlfcn elf
 985
 986 ifndef avoid-generated
 987 all-Depend-files := $(wildcard $(foreach dir,$(all-subdirs),\
 988                                          $(firstword $($(dir)-srcdir) \
 989                                                      $(..)$(dir))/Depend))
 990 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
 991                              $(common-objpfx)config.make $(..)Makeconfig \
 992                              $(wildcard $(sysdirs:=/Subdirs)) \
 993                              $(all-Depend-files)
 994         $(AWK) -f $< \
 995                -v subdirs='$(all-subdirs)' \
 996                -v srcpfx='$(..)' \
 997                $(filter %/Subdirs %/Depend,$^) > $@-tmp
 998         mv -f $@-tmp $@
 999 $(all-Depend-files): ;
1000 endif
1001
1002 # This gives partial TARGET:SOURCE pattern pairs to have rules
1003 # emitted into sysd-rules.  A sysdeps Makeconfig fragment can
1004 # add its own special object file prefix to this list with e.g. foo-%:%
1005 # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
1006 sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
1007
1008 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
1009 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
1010 ifneq (,$(sysdep-makeconfigs))
1011 include $(sysdep-makeconfigs)
1012 endif
1013
1014 # Compute just the target patterns.  Makeconfig has set sysd-rules-patterns.
1015 sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
1016                                          $(firstword $(subst :, ,$p))))
1017
1018 # A sysdeps Makeconfig fragment may set libc-reentrant to yes.
1019 ifeq (yes,$(libc-reentrant))
1020 defines += -D_LIBC_REENTRANT
1021
1022 libio-mtsafe = -D_IO_MTSAFE_IO
1023 endif
1024
1025 endif # Makeconfig not yet included
1026
1027 # Local Variables:
1028 # mode: makefile
1029 # End: