Makeconfig

   1 # Copyright (C) 1991-2017 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, see
  16 # <http://www.gnu.org/licenses/>.
  17
  18 #
  19 #       Makefile configuration options for the GNU C library.
  20 #
  21 ifneq (,)
  22 This makefile requires GNU Make.
  23 endif
  24
  25 all: # Make this the default goal
  26
  27 ifneq "$(origin +included-Makeconfig)" "file"
  28
  29 +included-Makeconfig := yes
  30
  31 ifdef subdir
  32 .. := ../
  33 endif
  34
  35 # $(common-objdir) is the place to put objects and
  36 # such that are not specific to a single subdir.
  37 ifdef objdir
  38 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
  39 common-objpfx = $(objdir)/
  40 common-objdir = $(objdir)
  41 else
  42 objdir must be defined by the build-directory Makefile.
  43 endif
  44
  45 # Root of the sysdeps tree.
  46 sysdep_dir := $(..)sysdeps
  47 export sysdep_dir := $(sysdep_dir)
  48
  49 # Get the values defined by options to `configure'.
  50 include $(common-objpfx)config.make
  51
  52 # What flags to give to sources which call user provided callbacks
  53 uses-callbacks = -fexceptions
  54
  55 # What flags to give to tests which test stack alignment
  56 stack-align-test-flags =
  57
  58 # Complete path to sysdep dirs.
  59 # `configure' writes a definition of `config-sysdirs' in `config.make'.
  60 sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
  61
  62 # Add-ons that contribute sysdeps trees get added to the include list
  63 # after sysdeps/generic.  This makes #include <sysdeps/...> work right
  64 # to find specific add-on files without assuming the add-on directory name.
  65 # It also means that headers can go into an add-on's base directory
  66 # instead of the add-on needing a sysdeps/generic of its own.
  67 sysdeps-srcdirs := $(foreach add-on,$(sysdeps-add-ons),\
  68                              $(firstword $(filter /%,$(add-on)) \
  69                                          $(..)$(add-on)))
  70 +sysdep_dirs = $(sysdirs) $(sysdeps-srcdirs)
  71 ifdef objdir
  72 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
  73 endif
  74
  75 # Run config.status to update config.make and config.h.  We don't show the
  76 # dependence of config.h to Make, because it is only touched when it
  77 # changes and so config.status would be run every time; the dependence of
  78 # config.make should suffice to force regeneration and re-exec, and the new
  79 # image will notice if config.h changed.
  80 $(common-objpfx)config.make: $(common-objpfx)config.status \
  81                              $(..)config.make.in $(..)config.h.in
  82         cd $(<D); $(SHELL) $(<F)
  83
  84 # Find all the add-on and sysdeps configure fragments, to make sure we
  85 # re-run configure when any of them changes.
  86 $(common-objpfx)config.status: $(..)version.h $(..)configure \
  87                                $(foreach dir,$(sysdirs),\
  88                                          $(wildcard $(dir)/Implies) \
  89                                          $(patsubst %.ac,%,\
  90                                                     $(firstword $(wildcard \
  91  $(addprefix $(dir)/,configure configure.ac))))) \
  92                                $(patsubst %.ac,%,\
  93  $(wildcard $(..)sysdeps/*/preconfigure $(..)sysdeps/*/preconfigure.ac)) \
  94                                $(patsubst %.ac,%,\
  95                                           $(foreach add-on,$(add-ons),\
  96                                                     $(firstword $(wildcard \
  97  $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
  98              configure configure.ac))) \
  99  $(wildcard $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
 100                         sysdeps/*/preconfigure sysdeps/*/preconfigure.ac))))
 101         @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
 102          echo The GNU C library has not been configured. >&2; \
 103          echo Run \`configure\' to configure it before building. >&2; \
 104          echo Try \`configure --help\' for more details. >&2; \
 105          exit 1; fi
 106
 107 # We don't want CPPFLAGS to be exported to the command running configure.
 108 unexport CPPFLAGS
 109
 110 # Get the user's configuration parameters.
 111 ifneq ($(wildcard $(..)configparms),)
 112 include $(..)configparms
 113 endif
 114 ifneq ($(objpfx),)
 115 ifneq ($(wildcard $(common-objpfx)configparms),)
 116 include $(common-objpfx)configparms
 117 endif
 118 endif
 119 \f
 120 ####
 121 ####    These are the configuration variables.  You can define values for
 122 ####    the variables below in the file `configparms'.
 123 ####    Do NOT edit this file.
 124 ####
 125
 126
 127 # Common prefix for machine-independent installation directories.
 128 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
 129 prefix = /usr/local
 130 endif
 131
 132 # Decide whether we shall build the programs or not.  We always do this
 133 # unless the user tells us (in configparms) or we are building for a
 134 # standalone target.
 135 ifndef build-programs
 136 ifneq ($(config-os),none)
 137 build-programs=yes
 138 else
 139 build-programs=no
 140 endif
 141 endif
 142
 143 # Common prefix for machine-dependent installation directories.
 144 ifeq ($(origin exec_prefix),undefined)
 145 exec_prefix = $(prefix)
 146 endif
 147
 148 # Where to install the library and object files.
 149 ifndef libdir
 150 libdir = $(exec_prefix)/lib
 151 endif
 152 inst_libdir = $(install_root)$(libdir)
 153
 154 # Where to install the shared library.
 155 ifndef slibdir
 156 slibdir = $(exec_prefix)/lib
 157 endif
 158 inst_slibdir = $(install_root)$(slibdir)
 159
 160 # Where to install the dynamic linker.
 161 ifndef rtlddir
 162 rtlddir = $(slibdir)
 163 endif
 164 inst_rtlddir = $(install_root)$(rtlddir)
 165
 166 # Prefix to put on files installed in $(libdir).  For libraries `libNAME.a',
 167 # the prefix is spliced between `lib' and the name, so the linker switch
 168 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
 169 # just prepended to the whole file name.
 170 ifeq ($(origin libprefix),undefined)
 171 libprefix =
 172 endif
 173
 174 # Where to install the header files.
 175 ifndef includedir
 176 includedir = $(prefix)/include
 177 endif
 178 inst_includedir = $(install_root)$(includedir)
 179
 180 # Where to install machine-independent data files.
 181 # These are the timezone database, and the locale database.
 182 ifndef datadir
 183 datadir = $(prefix)/share
 184 endif
 185 inst_datadir = $(install_root)$(datadir)
 186
 187 # Where to install the timezone data files (which are machine-independent).
 188 ifndef zonedir
 189 zonedir = $(datadir)/zoneinfo
 190 endif
 191 inst_zonedir = $(install_root)$(zonedir)
 192
 193 # Where to install the compiled binary locale archive and compiled
 194 # binary locale files.
 195 ifndef complocaledir
 196 complocaledir = $(libdir)/locale
 197 endif
 198 inst_complocaledir = $(install_root)$(complocaledir)
 199
 200 # Where to install the message catalog data files (which are
 201 # machine-independent).
 202 ifndef localedir
 203 localedir = $(datadir)/locale
 204 endif
 205 inst_localedir = $(install_root)$(localedir)
 206
 207 # Where to install the locale charmap source files.
 208 ifndef i18ndir
 209 i18ndir = $(datadir)/i18n
 210 endif
 211 inst_i18ndir = $(install_root)$(i18ndir)
 212
 213 # Where to install the shared object for charset transformation.
 214 ifndef gconvdir
 215 gconvdir = $(libdir)/gconv
 216 endif
 217 inst_gconvdir = $(install_root)$(gconvdir)
 218
 219 # Where to install programs.
 220 ifndef bindir
 221 bindir = $(exec_prefix)/bin
 222 endif
 223 inst_bindir = $(install_root)$(bindir)
 224
 225 # Where to install internal programs.
 226 ifndef libexecdir
 227 libexecdir = $(exec_prefix)/libexec
 228 endif
 229 inst_libexecdir = $(install_root)$(libexecdir)
 230
 231 # Where to install administrative programs.
 232 ifndef rootsbindir
 233 rootsbindir = $(exec_prefix)/sbin
 234 endif
 235 inst_rootsbindir = $(install_root)$(rootsbindir)
 236
 237 ifndef sbindir
 238 sbindir = $(exec_prefix)/sbin
 239 endif
 240 inst_sbindir = $(install_root)$(sbindir)
 241
 242 # Where to install the Info files.
 243 ifndef infodir
 244 infodir = $(prefix)/info
 245 endif
 246 inst_infodir = $(install_root)$(infodir)
 247
 248 # Where to install audit libraries.
 249 ifndef auditdir
 250 auditdir = $(libdir)/audit
 251 endif
 252 inst_auditdir = $(install_root)$(auditdir)
 253
 254 # Where to install default configuration files.  These include the local
 255 # timezone specification and network data base files.
 256 ifndef sysconfdir
 257 sysconfdir = $(prefix)/etc
 258 endif
 259 inst_sysconfdir = $(install_root)$(sysconfdir)
 260
 261 # Directory for the database files and Makefile for nss_db.
 262 ifndef vardbdir
 263 vardbdir = $(localstatedir)/db
 264 endif
 265 inst_vardbdir = $(install_root)$(vardbdir)
 266
 267 # Where to install the "localtime" timezone file; this is the file whose
 268 # contents $(localtime) specifies.  If this is a relative pathname, it is
 269 # relative to $(zonedir).  It is a good idea to put this somewhere
 270 # other than there, so the zoneinfo directory contains only universal data,
 271 # localizing the configuration data elsewhere.
 272 ifndef localtime-file
 273 localtime-file = $(sysconfdir)/localtime
 274 endif
 275
 276 # What to use for leap second specifications in compiling the default
 277 # timezone files.  Set this to `/dev/null' for no leap second handling as
 278 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
 279 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
 280 # This variable determines the default: if it's `/dev/null',
 281 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
 282 ifndef leapseconds
 283 leapseconds = /dev/null
 284 endif
 285
 286 # What timezone's DST rules should be used when a POSIX-style TZ
 287 # environment variable doesn't specify any rules.  For 1003.1 compliance
 288 # this timezone must use rules that are as U.S. federal law defines DST.
 289 # Run `make -C time echo-zonenames' to see a list of available zone names.
 290 # This setting can be changed with `zic -p TIMEZONE' at any time.
 291 # If you want POSIX.1 compatibility, use `America/New_York'.
 292 ifndef posixrules
 293 posixrules = America/New_York
 294 endif
 295
 296 # Where to install the "posixrules" timezone file; this is file
 297 # whose contents $(posixrules) specifies.  If this is a relative
 298 # pathname, it is relative to $(zonedir).
 299 ifndef posixrules-file
 300 posixrules-file = posixrules
 301 endif
 302
 303
 304 # Directory where your system's native header files live.
 305 # This is used on Unix systems to generate some GNU libc header files.
 306 ifndef sysincludedir
 307 sysincludedir = /usr/include
 308 endif
 309
 310
 311 # Commands to install files.
 312 ifndef INSTALL_DATA
 313 INSTALL_DATA = $(INSTALL) -m 644
 314 endif
 315 ifndef INSTALL_SCRIPT
 316 INSTALL_SCRIPT = $(INSTALL)
 317 endif
 318 ifndef INSTALL_PROGRAM
 319 INSTALL_PROGRAM = $(INSTALL)
 320 endif
 321 ifndef INSTALL
 322 INSTALL = install
 323 endif
 324
 325
 326 # The name of the C compiler.
 327 # If you've got GCC, and it works, use it.
 328 ifeq ($(origin CC),default)
 329 CC := gcc
 330 endif
 331
 332 # The name of the C compiler to use for compilations of programs to run on
 333 # the host that is building the library.  If you set CC to a
 334 # cross-compiler, you must set this to the normal compiler.
 335 ifndef BUILD_CC
 336 BUILD_CC = $(CC)
 337 endif
 338
 339 # Default flags to pass the C compiler.
 340 ifndef default_cflags
 341 ifeq ($(release),stable)
 342 default_cflags := -g -O2
 343 else
 344 default_cflags := -g -O
 345 endif
 346 endif
 347
 348 # Flags to pass the C compiler when assembling preprocessed assembly code
 349 # (`.S' files).
 350 ifndef asm-CPPFLAGS
 351 asm-CPPFLAGS =
 352 endif
 353
 354 as-needed := -Wl,--as-needed
 355 no-as-needed := -Wl,--no-as-needed
 356
 357 # Must be supported by the linker.
 358 no-whole-archive = -Wl,--no-whole-archive
 359 whole-archive = -Wl,--whole-archive
 360
 361 # Installed name of the startup code.
 362 # The ELF convention is that the startfile is called crt1.o
 363 start-installed-name = crt1.o
 364 # On systems that do not need a special startfile for statically linked
 365 # binaries, simply set it to the normal name.
 366 ifndef static-start-installed-name
 367 static-start-installed-name = $(start-installed-name)
 368 endif
 369
 370 ifeq (yesyes,$(build-shared)$(have-z-combreloc))
 371 combreloc-LDFLAGS = -Wl,-z,combreloc
 372 LDFLAGS.so += $(combreloc-LDFLAGS)
 373 LDFLAGS-rtld += $(combreloc-LDFLAGS)
 374 endif
 375
 376 relro-LDFLAGS = -Wl,-z,relro
 377 LDFLAGS.so += $(relro-LDFLAGS)
 378 LDFLAGS-rtld += $(relro-LDFLAGS)
 379
 380 ifeq (yes,$(have-hash-style))
 381 # For the time being we unconditionally use 'both'.  At some time we
 382 # should declare statically linked code as 'out of luck' and compile
 383 # with --hash-style=gnu only.
 384 hashstyle-LDFLAGS = -Wl,--hash-style=both
 385 LDFLAGS.so += $(hashstyle-LDFLAGS)
 386 LDFLAGS-rtld += $(hashstyle-LDFLAGS)
 387 endif
 388
 389 # Command to run after every final link (executable or shared object).
 390 # This is invoked with $(call after-link,...), so it should operate on
 391 # the file $1.  This can be set to do some sort of post-processing on
 392 # binaries, or to perform some sort of static sanity check.
 393 ifndef after-link
 394 after-link =
 395 endif
 396
 397 # Additional libraries to link into every test.
 398 link-extra-libs-tests = $(libsupport)
 399
 400 # Command for linking PIE programs with the C library.
 401 ifndef +link-pie
 402 +link-pie-before-libc = $(CC) -pie -Wl,-O1 -nostdlib -nostartfiles -o $@ \
 403              $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 404              $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 405              $(addprefix $(csu-objpfx),S$(start-installed-name)) \
 406              $(+preinit) $(+prectorS) \
 407              $(filter-out $(addprefix $(csu-objpfx),start.o \
 408                                                     S$(start-installed-name))\
 409                           $(+preinit) $(link-extra-libs) \
 410                           $(common-objpfx)libc% $(+postinit),$^) \
 411              $(link-extra-libs)
 412 +link-pie-after-libc = $(+postctorS) $(+postinit)
 413 define +link-pie
 414 $(+link-pie-before-libc) $(rtld-LDFLAGS) $(link-libc) $(+link-pie-after-libc)
 415 $(call after-link,$@)
 416 endef
 417 define +link-pie-tests
 418 $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
 419                          $(+link-pie-after-libc)
 420 $(call after-link,$@)
 421 endef
 422 define +link-pie-printers-tests
 423 $(+link-pie-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \
 424                          $(+link-pie-after-libc)
 425 $(call after-link,$@)
 426 endef
 427 endif
 428 # Command for statically linking programs with the C library.
 429 ifndef +link-static
 430 +link-static-before-libc = $(CC) -nostdlib -nostartfiles -static -o $@ \
 431               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F))  \
 432               $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
 433               $(+preinit) $(+prectorT) \
 434               $(filter-out $(addprefix $(csu-objpfx),start.o \
 435                                                      $(start-installed-name))\
 436                            $(+preinit) $(link-extra-libs-static) \
 437                            $(common-objpfx)libc% $(+postinit),$^) \
 438               $(link-extra-libs-static)
 439 +link-static-after-libc = $(+postctorT) $(+postinit)
 440 define +link-static
 441 $(+link-static-before-libc) $(link-libc-static) $(+link-static-after-libc)
 442 $(call after-link,$@)
 443 endef
 444 define +link-static-tests
 445 $(+link-static-before-libc) $(link-libc-static-tests) $(+link-static-after-libc)
 446 $(call after-link,$@)
 447 endef
 448 endif
 449 # Commands for linking programs with the C library.
 450 ifndef +link
 451 ifeq (yes,$(build-shared))
 452 ifeq (yes,$(build-pie-default))
 453 no-pie-ldflag = -no-pie
 454 +link = $(+link-pie)
 455 +link-tests = $(+link-pie-tests)
 456 +link-printers-tests = $(+link-pie-printers-tests)
 457 else  # not build-pie-default
 458 +link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \
 459               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 460               $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 461               $(addprefix $(csu-objpfx),$(start-installed-name)) \
 462               $(+preinit) $(+prector) \
 463               $(filter-out $(addprefix $(csu-objpfx),start.o \
 464                                                      $(start-installed-name))\
 465                            $(+preinit) $(link-extra-libs) \
 466                            $(common-objpfx)libc% $(+postinit),$^) \
 467               $(link-extra-libs)
 468 +link-after-libc = $(+postctor) $(+postinit)
 469 define +link
 470 $(+link-before-libc) $(rtld-LDFLAGS) $(link-libc) $(+link-after-libc)
 471 $(call after-link,$@)
 472 endef
 473 define +link-tests
 474 $(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
 475                      $(+link-after-libc)
 476 $(call after-link,$@)
 477 endef
 478 define +link-printers-tests
 479 $(+link-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \
 480                      $(+link-after-libc)
 481 $(call after-link,$@)
 482 endef
 483 endif  # build-pie-default
 484 else  # build-static
 485 +link = $(+link-static)
 486 +link-tests = $(+link-static-tests)
 487 +link-printers-tests = $(+link-static-tests)
 488 endif  # build-shared
 489 endif  # +link
 490
 491 # The pretty printer test programs need to be compiled without optimizations
 492 # so they won't confuse gdb.  We could use either the 'GCC optimize' pragma
 493 # or the 'optimize' function attribute to achieve this; however, at least on
 494 # ARM, gcc always produces different debugging symbols when invoked with
 495 # a -O greater than 0 than when invoked with -O0, regardless of anything else
 496 # we're using to suppress optimizations.  Therefore, we need to explicitly pass
 497 # -O0 to it through CFLAGS.
 498 # Additionally, the build system will try to -include $(common-objpfx)/config.h
 499 # when compiling the tests, which will throw an error if some special macros
 500 # (such as __OPTIMIZE__ and IS_IN_build) aren't defined.  To avoid this, we
 501 # tell gcc to define IS_IN_build.
 502 CFLAGS-printers-tests := -O0 -ggdb3 -DIS_IN_build
 503
 504 ifeq (yes,$(build-shared))
 505 # These indicate whether to link using the built ld.so or the installed one.
 506 installed-rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name)
 507 built-rtld-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so
 508
 509 ifndef rtld-LDFLAGS
 510 rtld-LDFLAGS = $(installed-rtld-LDFLAGS)
 511 endif
 512
 513 ifndef rtld-tests-LDFLAGS
 514 ifeq (yes,$(build-hardcoded-path-in-tests))
 515 rtld-tests-LDFLAGS = $(built-rtld-LDFLAGS)
 516 else
 517 rtld-tests-LDFLAGS = $(installed-rtld-LDFLAGS)
 518 endif  # build-hardcoded-path-in-tests
 519 endif  # rtld-tests-LDFLAGS
 520
 521 endif  # build-shared
 522
 523 ifndef link-libc
 524 ifeq (yes,$(build-shared))
 525 # We need the versioned name of libc.so in the deps of $(others) et al
 526 # so that the symlink to libc.so is created before anything tries to
 527 # run the linked programs.
 528 link-libc-rpath = -Wl,-rpath=$(rpath-link)
 529 link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
 530
 531 ifeq (yes,$(build-hardcoded-path-in-tests))
 532 link-libc-tests-rpath-link = $(link-libc-rpath)
 533 else
 534 link-libc-tests-rpath-link = $(link-libc-rpath-link)
 535 endif  # build-hardcoded-path-in-tests
 536
 537 link-libc-before-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
 538                           $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
 539                           $(as-needed) $(elf-objpfx)ld.so \
 540                           $(no-as-needed)
 541 link-libc = $(link-libc-rpath-link) $(link-libc-before-gnulib) $(gnulib)
 542
 543 link-libc-tests-after-rpath-link = $(link-libc-before-gnulib) $(gnulib-tests)
 544 link-libc-tests = $(link-libc-tests-rpath-link) \
 545                   $(link-libc-tests-after-rpath-link)
 546 # Pretty printer test programs always require rpath instead of rpath-link.
 547 link-libc-printers-tests = $(link-libc-rpath) \
 548                            $(link-libc-tests-after-rpath-link)
 549
 550 # This is how to find at build-time things that will be installed there.
 551 rpath-dirs = math elf dlfcn nss nis rt resolv crypt mathvec support
 552 rpath-link = \
 553 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
 554 else  # build-static
 555 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
 556 link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
 557 endif  # build-shared
 558 endif  # link-libc
 559
 560 # Differences in the linkers on the various platforms.
 561 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
 562 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
 563 LDFLAGS-rdynamic = -rdynamic
 564 LDFLAGS-Bsymbolic = -Bsymbolic
 565
 566 # Choose the default search path for the dynamic linker based on
 567 # where we will install libraries.
 568 ifneq ($(libdir),$(slibdir))
 569 default-rpath = $(slibdir):$(libdir)
 570 else
 571 default-rpath = $(libdir)
 572 endif
 573
 574 ifndef link-extra-libs
 575 link-extra-libs = $(LDLIBS-$(@F))
 576 link-extra-libs-static = $(link-extra-libs)
 577 endif
 578
 579 # The static libraries.
 580 link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
 581 link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
 582
 583 # How to link against libgcc.  Some libgcc functions, such as those
 584 # for "long long" arithmetic or software floating point, can always be
 585 # built without use of C library headers and do not have any global
 586 # state so can safely be linked statically into any executable or
 587 # shared library requiring them; these functions are in libgcc.a.
 588 # Other functions, relating to exception handling, may require C
 589 # library headers to build and it may not be safe to have more than
 590 # one copy of them in a process; these functions are only in
 591 # libgcc_s.so and libgcc_eh.a.
 592 #
 593 # To avoid circular dependencies when bootstrapping, it is desirable
 594 # to avoid use of libgcc_s and libgcc_eh in building glibc.  Where any
 595 # glibc functionality (in particular, thread cancellation) requires
 596 # exception handling, this is implemented through dlopen of libgcc_s
 597 # to avoid unnecessary dependencies on libgcc_s by programs not using
 598 # that functionality; executables built with glibc do not use
 599 # exception handling other than through thread cancellation.
 600 #
 601 # Undefined references to functions from libgcc_eh or libgcc_s may
 602 # arise for code built with -fexceptions.  In the case of statically
 603 # linked programs installed by glibc, unwinding will never actually
 604 # occur at runtime and the use of elf/static-stubs.c to resolve these
 605 # references is safe.  In the case of statically linked test programs
 606 # and test programs built with -fexceptions, unwinding may occur in
 607 # some cases and it is preferable to link with libgcc_eh or libgcc_s
 608 # so that the testing is as similar as possible to how programs will
 609 # be built with the installed glibc.
 610 #
 611 # Some architectures have architecture-specific systems for exception
 612 # handling that may involve undefined references to
 613 # architecture-specific functions.  On those architectures,
 614 # gnulib-arch and static-gnulib-arch may be defined in sysdeps
 615 # makefiles to use additional libraries for linking executables and
 616 # shared libraries built by glibc.
 617 ifndef gnulib
 618 ifneq ($(have-cc-with-libunwind),yes)
 619   libunwind =
 620 else
 621   libunwind = -lunwind
 622 endif
 623 libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
 624 gnulib-arch =
 625 gnulib = -lgcc $(gnulib-arch)
 626 gnulib-tests := -lgcc $(libgcc_eh)
 627 static-gnulib-arch =
 628 # By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
 629 # statically link programs.  When --disable-shared is used, we use
 630 # -lgcc_eh since elf/static-stubs.o isn't sufficient.
 631 ifeq (yes,$(build-shared))
 632 static-gnulib = -lgcc $(static-gnulib-arch)
 633 else
 634 static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
 635 endif
 636 static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
 637 libc.so-gnulib := -lgcc
 638 endif
 639 +preinit = $(addprefix $(csu-objpfx),crti.o)
 640 +postinit = $(addprefix $(csu-objpfx),crtn.o)
 641 +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
 642 +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 643 # Variants of the two previous definitions for linking PIE programs.
 644 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
 645 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
 646 # Variants of the two previous definitions for statically linking programs.
 647 +prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
 648 +postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 649 csu-objpfx = $(common-objpfx)csu/
 650 elf-objpfx = $(common-objpfx)elf/
 651
 652 # A command that, prepended to the name and arguments of a program,
 653 # and run on the build system, causes that program with those
 654 # arguments to be run on the host for which the library is built.
 655 ifndef test-wrapper
 656 test-wrapper =
 657 endif
 658 # Likewise, but the name of the program is preceded by
 659 # <variable>=<value> assignments for environment variables.
 660 ifndef test-wrapper-env
 661 test-wrapper-env = $(test-wrapper) env
 662 endif
 663 # Likewise, but the program's environment will be empty except for any
 664 # explicit <variable>=<value> assignments preceding the program name.
 665 ifndef test-wrapper-env-only
 666 test-wrapper-env-only = $(test-wrapper) env -i
 667 endif
 668
 669 # Whether to run test programs built for the library's host system.
 670 ifndef run-built-tests
 671 ifeq (yes|,$(cross-compiling)|$(test-wrapper))
 672 run-built-tests = no
 673 else
 674 run-built-tests = yes
 675 endif
 676 endif
 677
 678 # Whether to stop immediately when a test fails.  Nonempty means to
 679 # stop, empty means not to stop.
 680 ifndef stop-on-test-failure
 681 stop-on-test-failure =
 682 endif
 683
 684 # How to run a program we just linked with our library.
 685 # The program binary is assumed to be $(word 2,$^).
 686 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
 687 rtld-prefix = $(elf-objpfx)$(rtld-installed-name)                             \
 688               --library-path                                                  \
 689               $(rpath-link)$(patsubst %,:%,$(sysdep-library-path))
 690 ifeq (yes,$(build-shared))
 691 comma = ,
 692 sysdep-library-path = \
 693 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
 694                                        $(filter -Wl$(comma)-rpath-link=%,\
 695                                                 $(sysdep-LDFLAGS)))))
 696 # $(run-via-rtld-prefix) is a command that, when prepended to the name
 697 # of a program built with the newly built library, produces a command
 698 # that, executed on the host for which the library is built, runs that
 699 # program.  For tests listed in tests-static or xtests-static, it is
 700 # empty.
 701 run-via-rtld-prefix =                                                         \
 702   $(if $(strip $(filter $(notdir $(built-program-file)),                      \
 703                         $(tests-static) $(xtests-static))),, $(rtld-prefix))
 704 else
 705 run-via-rtld-prefix =
 706 endif
 707 # $(run-program-env) is the default environment variable settings to
 708 # use when running a program built with the newly built library.
 709 run-program-env = GCONV_PATH=$(common-objpfx)iconvdata \
 710                   LOCPATH=$(common-objpfx)localedata LC_ALL=C
 711 # $(run-program-prefix) is a command that, when prepended to the name
 712 # of a program built with the newly built library, produces a command
 713 # that, executed on the build system on which "make" is run, runs that
 714 # program.  $(run-program-prefix-before-env) and
 715 # $(run-program-prefix-after-env) are similar, but separate parts
 716 # before and after a list of environment variables.
 717 run-program-prefix-before-env = $(test-wrapper-env)
 718 run-program-prefix-after-env = $(run-via-rtld-prefix)
 719 run-program-prefix = $(run-program-prefix-before-env) $(run-program-env) \
 720                      $(run-program-prefix-after-env)
 721 # $(built-program-cmd) is a command that, executed on the build system
 722 # on which "make" is run, runs the newly built program that is the
 723 # second dependency of the makefile target in which
 724 # $(built-program-cmd) is used.  $(built-program-cmd-before-env) and
 725 # $(built-program-cmd-after-env) are similar, before and after a list
 726 # of environment variables.
 727 built-program-cmd-before-env = $(test-wrapper-env)
 728 built-program-cmd-after-env = $(run-via-rtld-prefix) $(built-program-file)
 729 built-program-cmd = $(built-program-cmd-before-env) $(run-program-env) \
 730                     $(built-program-cmd-after-env)
 731 # $(host-built-program-cmd) is a command that, executed on the host
 732 # for which the library is built, runs the newly built program that is
 733 # the second dependency of the makefile target in which
 734 # $(host-built-program-cmd) is used.
 735 host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
 736
 737 ifndef LD
 738 LD := ld -X
 739 endif
 740
 741 # $(test-via-rtld-prefix) is a command that, when prepended to the name
 742 # of a test program built with the newly built library, produces a command
 743 # that, executed on the host for which the library is built, runs that
 744 # program.  For tests listed in tests-static or xtests-static as well
 745 # as when test programs are hardcoded to the newly built libraries, it
 746 # is empty.
 747
 748 # $(test-program-prefix) is a command that, when prepended to the name
 749 # of a test program built with the newly built library, produces a command
 750 # that, executed on the build system on which "make" is run, runs that
 751 # test program.  $(test-program-prefix-before-env) and
 752 # $(test-program-prefix-after-env) are similar, before and after a
 753 # list of environment variables.
 754
 755 # $(test-program-cmd) is a command that, executed on the build system
 756 # on which "make" is run, runs the newly built test program that is the
 757 # second dependency of the makefile target in which
 758 # $(test-program-cmd) is used.  $(test-program-cmd-before-env) and
 759 # $(test-program-cmd-after-env) are similar, before and after a list
 760 # of environment variables.
 761
 762 # $(host-test-program-cmd) is a command that, executed on the host
 763 # for which the library is built, runs the newly built test program that
 764 # is the second dependency of the makefile target in which
 765 # $(host-test-program-cmd) is used.
 766
 767 ifeq (yes,$(build-hardcoded-path-in-tests))
 768 test-via-rtld-prefix =
 769 test-program-prefix-before-env = $(test-wrapper-env)
 770 test-program-prefix-after-env =
 771 test-program-prefix = $(test-program-prefix-before-env) $(run-program-env) \
 772                       $(test-program-prefix-after-env)
 773 test-program-cmd-before-env = $(test-wrapper-env)
 774 test-program-cmd-after-env = $(built-program-file)
 775 test-program-cmd = $(test-program-cmd-before-env) $(run-program-env) \
 776                    $(test-program-cmd-after-env)
 777 host-test-program-cmd = $(built-program-file)
 778 else
 779 test-via-rtld-prefix = $(run-via-rtld-prefix)
 780 test-program-prefix-before-env = $(run-program-prefix-before-env)
 781 test-program-prefix-after-env = $(run-program-prefix-after-env)
 782 test-program-prefix = $(run-program-prefix)
 783 test-program-cmd-before-env = $(built-program-cmd-before-env)
 784 test-program-cmd-after-env = $(built-program-cmd-after-env)
 785 test-program-cmd = $(built-program-cmd)
 786 host-test-program-cmd = $(host-built-program-cmd)
 787 endif
 788
 789 # Extra flags to pass to GCC.
 790 ifeq ($(all-warnings),yes)
 791 +gccwarn := -Wall -Wwrite-strings -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
 792 else
 793 +gccwarn := -Wall -Wwrite-strings
 794 endif
 795 +gccwarn += -Wundef
 796 ifeq ($(enable-werror),yes)
 797 +gccwarn += -Werror
 798 endif
 799 +gccwarn-c = -Wstrict-prototypes -Wold-style-definition
 800
 801 # We do not depend on the address of constants in different files to be
 802 # actually different, so allow the compiler to merge them all.
 803 +merge-constants = -fmerge-all-constants
 804
 805 # We have to assume that glibc functions are called in any rounding
 806 # mode and also change the rounding mode in a few functions. So,
 807 # disable any optimization that assume default rounding mode.
 808 +math-flags = -frounding-math
 809
 810 # We might want to compile with some stack-protection flag.
 811 ifneq ($(stack-protector),)
 812 +stack-protector=$(stack-protector)
 813 endif
 814
 815 # This is the program that generates makefile dependencies from C source files.
 816 # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
 817 # targets for headers so that removed headers don't break the build.
 818 ifndef +mkdep
 819 +mkdep = $(CC) -M -MP
 820 endif
 821
 822 # The program that makes Emacs-style TAGS files.
 823 ETAGS   := etags
 824
 825 # The `xgettext' program for producing .pot files from sources.
 826 ifndef XGETTEXT
 827 XGETTEXT = xgettext
 828 endif
 829
 830 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
 831 # perhaps others) to preprocess assembly code in some cases.
 832 M4 = m4
 833
 834 # To force installation of files even if they are older than the
 835 # installed files.  This variable is included in the dependency list
 836 # of all installation targets.
 837 ifeq ($(force-install),yes)
 838 +force = force-install
 839 else
 840 +force =
 841 endif
 842
 843 ####
 844 #### End of configuration variables.
 845 ####
 846 \f
 847 # This tells some versions of GNU make before 3.63 not to export all variables.
 848 .NOEXPORT:
 849
 850 # We want to echo the commands we're running without
 851 # umpteen zillion filenames along with it (we use `...' instead)
 852 # but we don't want this echoing done when the user has said
 853 # he doesn't want to see commands echoed by using -s.
 854 ifneq   "$(findstring s,$(MAKEFLAGS))" ""       # if -s
 855 +cmdecho        := echo >/dev/null
 856 else                                            # not -s
 857 +cmdecho        := echo
 858 endif                                           # -s
 859
 860 # These are the flags given to the compiler to tell
 861 # it what sort of optimization and/or debugging output to do.
 862 ifndef  +cflags
 863 # If `CFLAGS' was defined, use that.
 864 ifdef           CFLAGS
 865 +cflags := $(filter-out -I%,$(CFLAGS))
 866 endif           # CFLAGS
 867 endif   # +cflags
 868
 869 # If none of the above worked, default to "-g -O".
 870 ifeq    "$(strip $(+cflags))" ""
 871 +cflags := $(default_cflags)
 872 endif   # $(+cflags) == ""
 873
 874 +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) \
 875            $(+stack-protector)
 876 +gcc-nowarn := -w
 877
 878 # Don't duplicate options if we inherited variables from the parent.
 879 +cflags := $(sort $(+cflags))
 880
 881 # Each sysdeps directory can contain header files that both will be
 882 # used to compile and will be installed.  Each can also contain an
 883 # include/ subdirectory, whose header files will be used to compile
 884 # but will not be installed, and will take precedence over the
 885 # installed files.  This mirrors the top-level include/ subdirectory.
 886 +sysdep-includes := $(foreach dir,$(+sysdep_dirs),\
 887                               $(addprefix -I,$(wildcard $(dir)/include) $(dir)))
 888
 889 # These are flags given to the C compiler to tell it to look for
 890 # include files (including ones given in angle brackets) in the parent
 891 # library source directory, in the include directory, and in the
 892 # current directory.
 893 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
 894             $(+sysdep-includes) $(includes) \
 895             $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
 896
 897 # Since libio has several internal header files, we use a -I instead
 898 # of many little headers in the include directory.
 899 libio-include = -I$(..)libio
 900
 901 # List of non-library modules that we build.
 902 built-modules = iconvprogs iconvdata ldconfig lddlibc4 libmemusage \
 903                 libSegFault libpcprofile librpcsvc locale-programs \
 904                 memusagestat nonlib nscd extramodules libnldbl libsupport
 905
 906 in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
 907                                     $(libof-$(<F)) \
 908                                     $(libof-$(@F)) \
 909                                     libc))
 910
 911 # Build ld.so, libc.so and libpthread.so with -ftls-model=initial-exec
 912 tls-model = $(if $(filter libpthread rtld \
 913                           libc,$(in-module)),-ftls-model=initial-exec,)
 914
 915 module-cppflags-real = -include $(common-objpfx)libc-modules.h \
 916                        -DMODULE_NAME=$(in-module)
 917
 918 # We don't need libc-modules.h and the MODULE_NAME definition for .v.i
 919 # files.  These targets don't (and will likely never need to) use the IS_IN
 920 # facility.  In fact, shlib-versions should not use it because that will
 921 # create a circular dependency as libc-modules.h is generated from
 922 # shlib-versions.
 923 module-cppflags = $(if $(filter %.v.i,$(@F)),,$(module-cppflags-real))
 924
 925 # These are the variables that the implicit compilation rules use.
 926 # Note that we can't use -std=* in CPPFLAGS, because it overrides
 927 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
 928 # it causes cpp to stop predefining __ASSEMBLER__.
 929 CPPFLAGS = $(config-extra-cppflags) $(CPPUNDEFS) $(CPPFLAGS-config) \
 930            $($(subdir)-CPPFLAGS) \
 931            $(+includes) $(defines) $(module-cppflags) \
 932            -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
 933            $(CPPFLAGS-$(suffix $@)) \
 934            $(foreach lib,$(libof-$(basename $(@F))) \
 935                          $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
 936            $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
 937
 938 ifneq (no,$(have-tunables))
 939 CPPFLAGS += -DTOP_NAMESPACE=glibc
 940 endif
 941
 942 override CFLAGS = -std=gnu11 -fgnu89-inline $(config-extra-cflags) \
 943                   $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
 944                   $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
 945                   $(CFLAGS-$(@F)) $(tls-model) \
 946                   $(foreach lib,$(libof-$(basename $(@F))) \
 947                                 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
 948 # Use our copies of cstdlib and cmath.
 949 override CXXFLAGS = -I$(common-objpfx) $(c++-sysincludes) \
 950                     $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
 951                     $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
 952
 953 # If everything is compiled with -fPIC (implicitly) we must tell this by
 954 # defining the PIC symbol.
 955 ifeq (yes,$(build-pic-default))
 956 pic-default = -DPIC
 957 endif
 958
 959 # Enable object files for different versions of the library.
 960 # Various things use $(object-suffixes) to know what all to make.
 961 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
 962 # to pass different flags for each flavor.
 963 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
 964 # .op may be added to all-object-suffixes below.
 965 all-object-suffixes := .o .os .oS
 966 object-suffixes :=
 967 CPPFLAGS-.o = $(pic-default)
 968 CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
 969 libtype.o := lib%.a
 970 object-suffixes += .o
 971 ifeq (yes,$(build-shared))
 972 # Under --enable-shared, we will build a shared library of PIC objects.
 973 # The PIC object files are named foo.os.
 974 object-suffixes += .os
 975 CPPFLAGS-.os = -DPIC -DSHARED
 976 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
 977 libtype.os := lib%_pic.a
 978 # This can be changed by a sysdep makefile
 979 pic-ccflag = -fPIC
 980 # This one should always stay like this unless there is a very good reason.
 981 PIC-ccflag = -fPIC
 982 endif
 983 # This can be changed by a sysdep makefile
 984 pie-ccflag = -fpie
 985 # This one should always stay like this unless there is a very good reason.
 986 PIE-ccflag = -fPIE
 987 ifeq (yes,$(build-profile))
 988 # Under --enable-profile, we will build a static library of profiled objects.
 989 # The profiled object files are named foo.op.
 990 all-object-suffixes += .op
 991 object-suffixes += .op
 992 CPPFLAGS-.op = -DPROF $(pic-default)
 993 CFLAGS-.op = -pg
 994 libtype.op = lib%_p.a
 995 endif
 996
 997 # Convenience variable for when we want to treat shared-library cases
 998 # differently from the rest.
 999 object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
1000
1001 object-suffixes-for-libc := $(object-suffixes)
1002
1003 ifeq (yes,$(build-shared))
1004 # Build special library that contains the static-only routines for libc.
1005 object-suffixes-for-libc += .oS
1006
1007 # Must build the routines as PIC, though, because they can end up in (users')
1008 # shared objects.  We don't want to use CFLAGS-os because users may, for
1009 # example, make that processor-specific.
1010 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag)
1011 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
1012 libtype.oS = lib%_nonshared.a
1013 endif
1014
1015 # The assembler can generate debug information too.
1016 ifndef ASFLAGS
1017 ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
1018 endif
1019 ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
1020
1021 ifndef BUILD_CC
1022 BUILD_CC = $(CC)
1023 endif
1024
1025 move-if-change = $(SHELL) $(..)scripts/move-if-change
1026 \f
1027 -include $(common-objpfx)sysd-sorted
1028 subdirs = $(sorted-subdirs)
1029 subdir-srcdirs = $(foreach dir,$(subdirs),\
1030                            $(firstword $($(dir)-srcdir) $(..)$(dir)))
1031
1032 # This is a pair of implicit rules to preprocess a file with # comments,
1033 # %ifdef et al, based on config.h settings or other %include'd files.
1034 # We use chained rules instead of a pipeline here so that we can properly
1035 # check the exit status of cpp rather than using its bad output when there
1036 # is a preprocessing error.  Another rule should depend on the output file
1037 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
1038 # listing both its input files, and any header files that it may reference
1039 # (but no commands).
1040 %.v.i: $(common-objpfx)config.h $(..)Makeconfig
1041         sed '/^[        ]*%/!s/#.*$$//;/^[      ]*$$/d;s/^[     ]*%/#/' \
1042             $(filter-out FORCE %.h $(..)Makeconfig,$^) \
1043         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
1044                    > $@T
1045         mv -f $@T $@
1046 %.v: %.v.i
1047         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
1048         mv -f $@T $@
1049
1050 ifeq (yes, $(build-shared))
1051
1052 # To generate a header to support more than one ABI for different
1053 # architecture variants, the CPU/Makefile defines abi-variants to be a
1054 # list of names for those variants (e.g. 32 64), and, for each variant,
1055 # defines abi-$(variant)-condition to be the condition for those options
1056 # to use in a C #if condition.  abi-includes may be defined to a list of
1057 # headers to include in the generated header, if the default does not
1058 # suffice.  default-abi is defined to be the ABI for the current glibc
1059 # build.
1060
1061 ifndef abi-includes
1062 abi-includes := bits/wordsize.h
1063 endif
1064
1065 # Process the shlib-versions file, which tells us what shared library
1066 # version numbers to use when we install shared objects on this system.
1067 # We need to wait until $(subdirs) is complete.
1068 ifeq ($(sysd-sorted-done),t)
1069 -include $(common-objpfx)soversions.mk
1070 ifndef avoid-generated
1071 # This lets add-ons give more-specific matches that override defaults
1072 # in the top-level file.
1073 $(common-objpfx)shlib-versions.v.i: \
1074         $(wildcard $(+sysdep_dirs:=/shlib-versions) \
1075                    $(subdir-srcdirs:=/shlib-versions)) \
1076         $(..)shlib-versions
1077
1078 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
1079                               $(common-objpfx)shlib-versions.v
1080         $(AWK) -f $^ > $@T
1081         mv -f $@T $@
1082 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
1083         (while read which lib number setname; do \
1084            eval seen_$$which=1; \
1085            test x"$$which" = xDEFAULT || continue; \
1086            case $$number in \
1087              [0-9]*) echo "$$lib.so-version=.$$number"; \
1088                      echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
1089              *)      echo "$$lib.so-version=$$number"; \
1090                      echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
1091            esac; \
1092          done; \
1093          echo soversions.mk-done = t;) < $< > $@T; exit 0
1094         mv -f $@T $@
1095 endif
1096 endif
1097
1098 postclean-generated += soversions.mk soversions.i \
1099                        shlib-versions.v shlib-versions.v.i
1100
1101 before-compile += $(common-objpfx)libc-modules.h
1102 ifeq ($(soversions.mk-done),t)
1103 # Generate a header with macro definitions for use with the IS_IN macro.
1104 # These are the possible values for the MODULE_NAME macro defined when building
1105 # sources, to identify which module the translation unit is going to be built
1106 # into.
1107 $(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @:
1108 $(common-objpfx)libc-modules.stmp: $(..)scripts/gen-libc-modules.awk \
1109                                    $(common-objpfx)soversions.i
1110         $(AWK) -v buildlist="$(subst -,_,$(built-modules))" -f $^ > ${@:stmp=T}
1111         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1112         touch $@
1113
1114 endif
1115
1116 # Build the tunables list header early since it could be used by any module in
1117 # glibc.
1118 ifneq (no,$(have-tunables))
1119 before-compile += $(common-objpfx)dl-tunable-list.h
1120
1121 $(common-objpfx)dl-tunable-list.h: $(..)scripts/gen-tunables.awk \
1122                                    $(..)elf/dl-tunables.list
1123         $(AWK) -f $^ > $@.tmp
1124         mv $@.tmp $@
1125 endif
1126
1127 common-generated += libc-modules.h libc-modules.stmp
1128
1129 # The name under which the run-time dynamic linker is installed.
1130 # We are currently going for the convention that `/lib/ld.so.1'
1131 # names the SVR4/ELF ABI-compliant dynamic linker.
1132 ifndef rtld-installed-name
1133 ifdef ld.so-version
1134 rtld-installed-name = $(ld.so-version)
1135 else
1136 rtld-installed-name = ld.so.1
1137 endif
1138 endif
1139
1140 ifndef rtld-version-installed-name
1141 rtld-version-installed-name = ld-$(version).so
1142 endif
1143
1144 endif # build-shared
1145
1146
1147 ifeq ($(build-shared),yes)
1148 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
1149 else
1150 libdl = $(common-objpfx)dlfcn/libdl.a
1151 endif
1152
1153 ifeq ($(build-shared),yes)
1154 libm = $(common-objpfx)math/libm.so$(libm.so-version)
1155 libmvec = $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version)
1156 else
1157 libm = $(common-objpfx)math/libm.a
1158 libmvec = $(common-objpfx)mathvec/libmvec.a
1159 endif
1160
1161 ifeq ($(build-shared),yes)
1162 libsupport = $(common-objpfx)support/libsupport_nonshared.a
1163 else
1164 libsupport = $(common-objpfx)support/libsupport.a
1165 endif
1166
1167 # These are the subdirectories containing the library source.  The order
1168 # is more or less arbitrary.  The sorting step will take care of the
1169 # dependencies.
1170 all-subdirs = csu assert ctype locale intl catgets math setjmp signal       \
1171               stdlib stdio-common libio malloc string wcsmbs time dirent    \
1172               grp pwd posix io termios resource misc socket sysvipc gmon    \
1173               gnulib iconv iconvdata wctype manual shadow gshadow po argp   \
1174               crypt localedata timezone rt conform debug mathvec support    \
1175               $(add-on-subdirs) dlfcn elf
1176
1177 ifndef avoid-generated
1178 # sysd-sorted itself will contain rules making the sysd-sorted target
1179 # depend on Depend files.  But if you just added a Depend file to an
1180 # existing directory not in all-subdirs, then sysd-sorted needs to
1181 # be regenerated, so it depends on existing $(sorted-subdirs:=/Depend) files.
1182 all-Depend-files := $(wildcard $(sort \
1183                         $(foreach dir,$(all-subdirs),\
1184                                   $(firstword $($(dir)-srcdir) \
1185                                   $(..)$(dir))/Depend) \
1186                         $(sorted-subdirs:=/Depend)))
1187 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
1188                              $(common-objpfx)config.make $(..)Makeconfig \
1189                              $(wildcard $(sysdirs:=/Subdirs)) \
1190                              $(all-Depend-files)
1191         $(AWK) -f $< \
1192                -v subdirs='$(all-subdirs)' \
1193                -v srcpfx='$(..)' \
1194                $(filter %/Subdirs %/Depend,$^) > $@-tmp
1195         mv -f $@-tmp $@
1196 $(all-Depend-files): ;
1197 endif
1198
1199 # This gives partial TARGET:SOURCE pattern pairs to have rules
1200 # emitted into sysd-rules.  A sysdeps Makeconfig fragment can
1201 # add its own special object file prefix to this list with e.g. foo-%:%
1202 # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
1203 sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
1204
1205 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
1206 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
1207 ifneq (,$(sysdep-makeconfigs))
1208 include $(sysdep-makeconfigs)
1209 endif
1210
1211 # Compute just the target patterns.  Makeconfig has set sysd-rules-patterns.
1212 sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
1213                                          $(firstword $(subst :, ,$p))))
1214
1215 # A sysdeps Makeconfig fragment may set libc-reentrant to yes.
1216 ifeq (yes,$(libc-reentrant))
1217 defines += -D_LIBC_REENTRANT
1218
1219 libio-mtsafe = -D_IO_MTSAFE_IO
1220 endif
1221
1222 # The name to give to a test in test results summaries.
1223 test-name = $(strip $(patsubst %.out, %, $(patsubst $(common-objpfx)%, %, $@)))
1224
1225 # Likewise, in XFAIL variable names.
1226 test-xfail-name = $(strip $(patsubst %.out, %, $(patsubst $(objpfx)%, %, $@)))
1227
1228 # Command to output a test status line (such as PASS: test-name).  If
1229 # test-xfail-$(test-xfail-name) has a nonempty value, the status will be
1230 # XPASS or XFAIL rather than PASS or FAIL.
1231 evaluate-test = $(..)scripts/evaluate-test.sh $(test-name) $$? \
1232                   $(if $(test-xfail-$(test-xfail-name)),true,false) \
1233                   $(if $(stop-on-test-failure),true,false) \
1234                   > $(common-objpfx)$(test-name).test-result
1235
1236 endif # Makeconfig not yet included
1237
1238 # Local Variables:
1239 # mode: makefile
1240 # End: