Makeconfig

   1 # Copyright (C) 1991-2019 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 +sysdep_dirs = $(sysdirs)
  63 ifdef objdir
  64 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
  65 endif
  66
  67 # Run config.status to update config.make and config.h.  We don't show the
  68 # dependence of config.h to Make, because it is only touched when it
  69 # changes and so config.status would be run every time; the dependence of
  70 # config.make should suffice to force regeneration and re-exec, and the new
  71 # image will notice if config.h changed.
  72 $(common-objpfx)config.make: $(common-objpfx)config.status \
  73                              $(..)config.make.in $(..)config.h.in
  74         cd $(<D); $(SHELL) $(<F)
  75
  76 # Find all the sysdeps configure fragments, to make sure we re-run
  77 # configure when any of them changes.
  78 $(common-objpfx)config.status: $(..)version.h $(..)configure \
  79                                $(foreach dir,$(sysdirs),\
  80                                          $(wildcard $(dir)/Implies) \
  81                                          $(patsubst %.ac,%,\
  82                                                     $(firstword $(wildcard \
  83  $(addprefix $(dir)/,configure configure.ac))))) \
  84                                $(patsubst %.ac,%,\
  85  $(wildcard $(..)sysdeps/*/preconfigure $(..)sysdeps/*/preconfigure.ac))
  86         @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
  87          echo The GNU C library has not been configured. >&2; \
  88          echo Run \`configure\' to configure it before building. >&2; \
  89          echo Try \`configure --help\' for more details. >&2; \
  90          exit 1; fi
  91
  92 # We don't want CPPFLAGS to be exported to the command running configure.
  93 unexport CPPFLAGS
  94
  95 # Get the user's configuration parameters.
  96 ifneq ($(wildcard $(..)configparms),)
  97 include $(..)configparms
  98 endif
  99 ifneq ($(objpfx),)
 100 ifneq ($(wildcard $(common-objpfx)configparms),)
 101 include $(common-objpfx)configparms
 102 endif
 103 endif
 104 \f
 105 ####
 106 ####    These are the configuration variables.  You can define values for
 107 ####    the variables below in the file `configparms'.
 108 ####    Do NOT edit this file.
 109 ####
 110
 111
 112 # Common prefix for machine-independent installation directories.
 113 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
 114 prefix = /usr/local
 115 endif
 116
 117 # Decide whether we shall build the programs or not.  We always do this
 118 # unless the user tells us (in configparms) or we are building for a
 119 # standalone target.
 120 ifndef build-programs
 121 ifneq ($(config-os),none)
 122 build-programs=yes
 123 else
 124 build-programs=no
 125 endif
 126 endif
 127
 128 # Common prefix for machine-dependent installation directories.
 129 ifeq ($(origin exec_prefix),undefined)
 130 exec_prefix = $(prefix)
 131 endif
 132
 133 # Where to install the library and object files.
 134 ifndef libdir
 135 libdir = $(exec_prefix)/lib
 136 endif
 137 inst_libdir = $(install_root)$(libdir)
 138
 139 # Where to install the shared library.
 140 ifndef slibdir
 141 slibdir = $(exec_prefix)/lib
 142 endif
 143 inst_slibdir = $(install_root)$(slibdir)
 144
 145 # Where to install the dynamic linker.
 146 ifndef rtlddir
 147 rtlddir = $(slibdir)
 148 endif
 149 inst_rtlddir = $(install_root)$(rtlddir)
 150
 151 # Prefix to put on files installed in $(libdir).  For libraries `libNAME.a',
 152 # the prefix is spliced between `lib' and the name, so the linker switch
 153 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
 154 # just prepended to the whole file name.
 155 ifeq ($(origin libprefix),undefined)
 156 libprefix =
 157 endif
 158
 159 # Where to install the header files.
 160 ifndef includedir
 161 includedir = $(prefix)/include
 162 endif
 163 inst_includedir = $(install_root)$(includedir)
 164
 165 # Where to install machine-independent data files.
 166 # These are the timezone database, and the locale database.
 167 ifndef datadir
 168 datadir = $(prefix)/share
 169 endif
 170 inst_datadir = $(install_root)$(datadir)
 171
 172 # Where to install the timezone data files (which are machine-independent).
 173 ifndef zonedir
 174 zonedir = $(datadir)/zoneinfo
 175 endif
 176 inst_zonedir = $(install_root)$(zonedir)
 177
 178 # Where to install the compiled binary locale archive and compiled
 179 # binary locale files.
 180 ifndef complocaledir
 181 complocaledir = $(libdir)/locale
 182 endif
 183 inst_complocaledir = $(install_root)$(complocaledir)
 184
 185 # Where to install the message catalog data files (which are
 186 # machine-independent).
 187 ifndef localedir
 188 localedir = $(datadir)/locale
 189 endif
 190 inst_localedir = $(install_root)$(localedir)
 191
 192 # Where to install the locale charmap source files.
 193 ifndef i18ndir
 194 i18ndir = $(datadir)/i18n
 195 endif
 196 inst_i18ndir = $(install_root)$(i18ndir)
 197
 198 # Where to install the shared object for charset transformation.
 199 ifndef gconvdir
 200 gconvdir = $(libdir)/gconv
 201 endif
 202 inst_gconvdir = $(install_root)$(gconvdir)
 203
 204 # Where to install programs.
 205 ifndef bindir
 206 bindir = $(exec_prefix)/bin
 207 endif
 208 inst_bindir = $(install_root)$(bindir)
 209
 210 # Where to install internal programs.
 211 ifndef libexecdir
 212 libexecdir = $(exec_prefix)/libexec
 213 endif
 214 inst_libexecdir = $(install_root)$(libexecdir)
 215
 216 # Where to install administrative programs.
 217 ifndef rootsbindir
 218 rootsbindir = $(exec_prefix)/sbin
 219 endif
 220 inst_rootsbindir = $(install_root)$(rootsbindir)
 221
 222 ifndef sbindir
 223 sbindir = $(exec_prefix)/sbin
 224 endif
 225 inst_sbindir = $(install_root)$(sbindir)
 226
 227 # Where to install the Info files.
 228 ifndef infodir
 229 infodir = $(prefix)/info
 230 endif
 231 inst_infodir = $(install_root)$(infodir)
 232
 233 # Where to install audit libraries.
 234 ifndef auditdir
 235 auditdir = $(libdir)/audit
 236 endif
 237 inst_auditdir = $(install_root)$(auditdir)
 238
 239 # Where to install default configuration files.  These include the local
 240 # timezone specification and network data base files.
 241 ifndef sysconfdir
 242 sysconfdir = $(prefix)/etc
 243 endif
 244 inst_sysconfdir = $(install_root)$(sysconfdir)
 245
 246 # Directory for the database files and Makefile for nss_db.
 247 ifndef vardbdir
 248 vardbdir = $(localstatedir)/db
 249 endif
 250 inst_vardbdir = $(install_root)$(vardbdir)
 251
 252 # Where to install the "localtime" timezone file; this is the file whose
 253 # contents $(localtime) specifies.  If this is a relative pathname, it is
 254 # relative to $(zonedir).  It is a good idea to put this somewhere
 255 # other than there, so the zoneinfo directory contains only universal data,
 256 # localizing the configuration data elsewhere.
 257 ifndef localtime-file
 258 localtime-file = $(sysconfdir)/localtime
 259 endif
 260
 261 # What to use for leap second specifications in compiling the default
 262 # timezone files.  Set this to `/dev/null' for no leap second handling as
 263 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
 264 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
 265 # This variable determines the default: if it's `/dev/null',
 266 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
 267 ifndef leapseconds
 268 leapseconds = /dev/null
 269 endif
 270
 271 # What timezone's DST rules should be used when a POSIX-style TZ
 272 # environment variable doesn't specify any rules.  For 1003.1 compliance
 273 # this timezone must use rules that are as U.S. federal law defines DST.
 274 # Run `make -C time echo-zonenames' to see a list of available zone names.
 275 # This setting can be changed with `zic -p TIMEZONE' at any time.
 276 # If you want POSIX.1 compatibility, use `America/New_York'.
 277 ifndef posixrules
 278 posixrules = America/New_York
 279 endif
 280
 281 # Where to install the "posixrules" timezone file; this is file
 282 # whose contents $(posixrules) specifies.  If this is a relative
 283 # pathname, it is relative to $(zonedir).
 284 ifndef posixrules-file
 285 posixrules-file = posixrules
 286 endif
 287
 288
 289 # Directory where your system's native header files live.
 290 # This is used on Unix systems to generate some GNU libc header files.
 291 ifndef sysincludedir
 292 sysincludedir = /usr/include
 293 endif
 294
 295
 296 # Commands to install files.
 297 ifndef INSTALL_DATA
 298 INSTALL_DATA = $(INSTALL) -m 644
 299 endif
 300 ifndef INSTALL_SCRIPT
 301 INSTALL_SCRIPT = $(INSTALL)
 302 endif
 303 ifndef INSTALL_PROGRAM
 304 INSTALL_PROGRAM = $(INSTALL)
 305 endif
 306 ifndef INSTALL
 307 INSTALL = install
 308 endif
 309
 310
 311 # The name of the C compiler.
 312 # If you've got GCC, and it works, use it.
 313 ifeq ($(origin CC),default)
 314 CC := gcc
 315 endif
 316
 317 # The name of the C compiler to use for compilations of programs to run on
 318 # the host that is building the library.  If you set CC to a
 319 # cross-compiler, you must set this to the normal compiler.
 320 ifndef BUILD_CC
 321 BUILD_CC = $(CC)
 322 endif
 323
 324 # Default flags to pass the C compiler.
 325 ifndef default_cflags
 326 ifeq ($(release),stable)
 327 default_cflags := -g -O2
 328 else
 329 default_cflags := -g -O
 330 endif
 331 endif
 332
 333 # Flags to pass the C compiler when assembling preprocessed assembly code
 334 # (`.S' files).
 335 ifndef asm-CPPFLAGS
 336 asm-CPPFLAGS =
 337 endif
 338
 339 as-needed := -Wl,--as-needed
 340 no-as-needed := -Wl,--no-as-needed
 341
 342 # Must be supported by the linker.
 343 no-whole-archive = -Wl,--no-whole-archive
 344 whole-archive = -Wl,--whole-archive
 345
 346 # Installed name of the startup code.
 347 # The ELF convention is that the startfile is called crt1.o
 348 start-installed-name = crt1.o
 349 # On systems that do not need a special startfile for statically linked
 350 # binaries, simply set it to the normal name.
 351 ifndef static-start-installed-name
 352 static-start-installed-name = $(start-installed-name)
 353 endif
 354
 355 ifeq (yes,$(enable-static-pie))
 356 # Link with rcrt1.o, instead of crt1.o, to call _dl_relocate_static_pie
 357 # to relocate static PIE.
 358 real-static-start-installed-name = r$(static-start-installed-name)
 359 else
 360 real-static-start-installed-name = $(static-start-installed-name)
 361 endif
 362
 363 ifeq (yesyes,$(build-shared)$(have-z-combreloc))
 364 combreloc-LDFLAGS = -Wl,-z,combreloc
 365 LDFLAGS.so += $(combreloc-LDFLAGS)
 366 LDFLAGS-rtld += $(combreloc-LDFLAGS)
 367 endif
 368
 369 relro-LDFLAGS = -Wl,-z,relro
 370 LDFLAGS.so += $(relro-LDFLAGS)
 371 LDFLAGS-rtld += $(relro-LDFLAGS)
 372
 373 ifeq (yes,$(have-hash-style))
 374 # For the time being we unconditionally use 'both'.  At some time we
 375 # should declare statically linked code as 'out of luck' and compile
 376 # with --hash-style=gnu only.
 377 hashstyle-LDFLAGS = -Wl,--hash-style=both
 378 LDFLAGS.so += $(hashstyle-LDFLAGS)
 379 LDFLAGS-rtld += $(hashstyle-LDFLAGS)
 380 endif
 381
 382 ifeq (yes,$(enable-static-pie))
 383 pic-default = -DPIC
 384 # Compile libc.a and libc_p.a with -fPIE/-fpie for static PIE.
 385 pie-default = $(pie-ccflag)
 386 ifeq (yes,$(have-static-pie))
 387 default-pie-ldflag = -static-pie
 388 else
 389 # Static PIE can't have dynamic relocations in read-only segments since
 390 # static PIE is mapped into memory by kernel.  --eh-frame-hdr is needed
 391 # for PIE to support exception.
 392 default-pie-ldflag = -Wl,-pie,--no-dynamic-linker,--eh-frame-hdr,-z,text
 393 endif
 394 endif
 395
 396 # If lazy relocations are disabled, add the -z now flag.  Use
 397 # LDFLAGS-lib.so instead of LDFLAGS.so, to avoid adding the flag to
 398 # test modules.
 399 ifeq ($(bind-now),yes)
 400 LDFLAGS-lib.so += -Wl,-z,now
 401 # Extra flags for dynamically linked non-test main programs.
 402 link-extra-flags += -Wl,-z,now
 403 endif
 404
 405 # Command to run after every final link (executable or shared object).
 406 # This is invoked with $(call after-link,...), so it should operate on
 407 # the file $1.  This can be set to do some sort of post-processing on
 408 # binaries, or to perform some sort of static sanity check.
 409 ifndef after-link
 410 after-link =
 411 endif
 412
 413 # Additional libraries to link into every test.
 414 link-extra-libs-tests = $(libsupport)
 415
 416 # Command for linking PIE programs with the C library.
 417 ifndef +link-pie
 418 +link-pie-before-libc = $(if $($(@F)-no-pie),$(no-pie-ldflag),-pie) \
 419              -Wl,-O1 -nostdlib -nostartfiles -o $@ \
 420              $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 421              $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 422              $(firstword $(CRT-$(@F)) $(csu-objpfx)S$(start-installed-name)) \
 423              $(+preinit) $(+prectorS) \
 424              $(filter-out $(addprefix $(csu-objpfx),start.o \
 425                                                     S$(start-installed-name))\
 426                           $(+preinit) $(link-extra-libs) \
 427                           $(common-objpfx)libc% $(+postinit),$^) \
 428              $(link-extra-libs)
 429 +link-pie-after-libc = $(+postctorS) $(+postinit)
 430 define +link-pie
 431 $(CC) $(link-libc-rpath-link) $(+link-pie-before-libc) $(rtld-LDFLAGS) \
 432   $(link-extra-flags) $(link-libc) $(+link-pie-after-libc)
 433 $(call after-link,$@)
 434 endef
 435 define +link-pie-tests
 436 $(CC) $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
 437   $(+link-pie-after-libc)
 438 $(call after-link,$@)
 439 endef
 440 define +link-pie-printers-tests
 441 $(CC) $(+link-pie-before-libc) $(built-rtld-LDFLAGS) \
 442   $(link-libc-printers-tests) $(+link-pie-after-libc)
 443 $(call after-link,$@)
 444 endef
 445 endif
 446 # Command for statically linking programs with the C library.
 447 ifndef +link-static
 448 +link-static-before-libc = -nostdlib -nostartfiles -static -o $@ \
 449               $(if $($(@F)-no-pie),$(no-pie-ldflag),$(default-pie-ldflag)) \
 450               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F))  \
 451               $(firstword $(CRT-$(@F)) $(csu-objpfx)$(real-static-start-installed-name)) \
 452               $(+preinit) $(+prectorT) \
 453               $(filter-out $(addprefix $(csu-objpfx),start.o \
 454                                                      $(start-installed-name))\
 455                            $(+preinit) $(link-extra-libs-static) \
 456                            $(common-objpfx)libc% $(+postinit),$^) \
 457               $(link-extra-libs-static)
 458 +link-static-after-libc = $(+postctorT) $(+postinit)
 459 define +link-static
 460 $(CC) $(+link-static-before-libc) $(link-extra-flags) $(link-libc-static) \
 461   $(+link-static-after-libc)
 462 $(call after-link,$@)
 463 endef
 464 define +link-static-tests
 465 $(CC) $(+link-static-before-libc) $(link-libc-static-tests) \
 466   $(+link-static-after-libc)
 467 $(call after-link,$@)
 468 endef
 469 endif
 470 # Commands for linking programs with the C library.
 471 ifndef +link
 472 ifeq (yes,$(build-shared))
 473 ifeq (yes,$(cc-pie-default))
 474 no-pie-ldflag = -no-pie
 475 endif
 476 ifeq (yes,$(build-pie-default))
 477 +link = $(+link-pie)
 478 +link-tests = $(+link-pie-tests)
 479 +link-printers-tests = $(+link-pie-printers-tests)
 480 else  # not build-pie-default
 481 +link-before-libc = -nostdlib -nostartfiles -o $@ \
 482               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 483               $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 484               $(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-installed-name)) \
 485               $(+preinit) $(+prector) \
 486               $(filter-out $(addprefix $(csu-objpfx),start.o \
 487                                                      $(start-installed-name))\
 488                            $(+preinit) $(link-extra-libs) \
 489                            $(common-objpfx)libc% $(+postinit),$^) \
 490               $(link-extra-libs)
 491 +link-after-libc = $(+postctor) $(+postinit)
 492 define +link
 493 $(CC) $(link-libc-rpath-link) $(+link-before-libc) $(rtld-LDFLAGS) \
 494   $(link-extra-flags) $(link-libc) $(+link-after-libc)
 495 $(call after-link,$@)
 496 endef
 497 define +link-tests
 498 $(CC) $(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
 499                      $(+link-after-libc)
 500 $(call after-link,$@)
 501 endef
 502 define +link-printers-tests
 503 $(CC) $(+link-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \
 504                      $(+link-after-libc)
 505 $(call after-link,$@)
 506 endef
 507 endif  # build-pie-default
 508 else  # build-static
 509 +link = $(+link-static)
 510 +link-tests = $(+link-static-tests)
 511 +link-printers-tests = $(+link-static-tests)
 512 endif  # build-shared
 513 endif  # +link
 514
 515 # The pretty printer test programs need to be compiled without optimizations
 516 # so they won't confuse gdb.  We could use either the 'GCC optimize' pragma
 517 # or the 'optimize' function attribute to achieve this; however, at least on
 518 # ARM, gcc always produces different debugging symbols when invoked with
 519 # a -O greater than 0 than when invoked with -O0, regardless of anything else
 520 # we're using to suppress optimizations.  Therefore, we need to explicitly pass
 521 # -O0 to it through CFLAGS.
 522 # Additionally, the build system will try to -include $(common-objpfx)/config.h
 523 # when compiling the tests, which will throw an error if some special macros
 524 # (such as __OPTIMIZE__ and IS_IN_build) aren't defined.  To avoid this, we
 525 # tell gcc to define IS_IN_build.
 526 CFLAGS-printers-tests := -O0 -ggdb3 -DIS_IN_build
 527
 528 ifeq (yes,$(build-shared))
 529 # These indicate whether to link using the built ld.so or the installed one.
 530 installed-rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name)
 531 built-rtld-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so
 532
 533 ifndef rtld-LDFLAGS
 534 rtld-LDFLAGS = $(installed-rtld-LDFLAGS)
 535 endif
 536
 537 ifndef rtld-tests-LDFLAGS
 538 ifeq (yes,$(build-hardcoded-path-in-tests))
 539 rtld-tests-LDFLAGS = $(built-rtld-LDFLAGS)
 540 else
 541 rtld-tests-LDFLAGS = $(installed-rtld-LDFLAGS)
 542 endif  # build-hardcoded-path-in-tests
 543 endif  # rtld-tests-LDFLAGS
 544
 545 endif  # build-shared
 546
 547 ifndef link-libc
 548 ifeq (yes,$(build-shared))
 549 # We need the versioned name of libc.so in the deps of $(others) et al
 550 # so that the symlink to libc.so is created before anything tries to
 551 # run the linked programs.
 552 link-libc-rpath = -Wl,-rpath=$(rpath-link)
 553 link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
 554
 555 # For programs which are not tests, $(link-libc-rpath-link) is added
 556 # directly in $(+link), $(+link-pie) above, so that -Wl,-rpath-link
 557 # comes before the expansion of LDLIBS-* and affects libraries added
 558 # there.  For shared objects, -Wl,-rpath-link is added via
 559 # $(build-shlib-helper) and $(build-module-helper) in Makerules (also
 560 # before the expansion of LDLIBS-* variables).
 561
 562 # Tests use -Wl,-rpath instead of -Wl,-rpath-link for
 563 # build-hardcoded-path-in-tests.
 564 ifeq (yes,$(build-hardcoded-path-in-tests))
 565 link-libc-tests-rpath-link = $(link-libc-rpath)
 566 else
 567 link-libc-tests-rpath-link = $(link-libc-rpath-link)
 568 endif  # build-hardcoded-path-in-tests
 569
 570 link-libc-before-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
 571                           $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
 572                           $(as-needed) $(elf-objpfx)ld.so \
 573                           $(no-as-needed)
 574 link-libc = $(link-libc-before-gnulib) $(gnulib)
 575
 576 link-libc-tests-after-rpath-link = $(link-libc-before-gnulib) $(gnulib-tests)
 577 link-libc-tests = $(link-libc-tests-rpath-link) \
 578                   $(link-libc-tests-after-rpath-link)
 579 # Pretty printer test programs always require rpath instead of rpath-link.
 580 link-libc-printers-tests = $(link-libc-rpath) \
 581                            $(link-libc-tests-after-rpath-link)
 582
 583 # This is how to find at build-time things that will be installed there.
 584 rpath-dirs = math elf dlfcn nss nis rt resolv mathvec support
 585 rpath-link = \
 586 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
 587 else  # build-static
 588 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
 589 link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
 590 endif  # build-shared
 591 endif  # link-libc
 592
 593 # Differences in the linkers on the various platforms.
 594 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
 595 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
 596 LDFLAGS-rdynamic = -rdynamic
 597 LDFLAGS-Bsymbolic = -Bsymbolic
 598
 599 # Choose the default search path for the dynamic linker based on
 600 # where we will install libraries.
 601 ifneq ($(libdir),$(slibdir))
 602 default-rpath = $(slibdir):$(libdir)
 603 else
 604 default-rpath = $(libdir)
 605 endif
 606
 607 ifndef link-extra-libs
 608 link-extra-libs = $(LDLIBS-$(@F))
 609 link-extra-libs-static = $(link-extra-libs)
 610 endif
 611
 612 # The static libraries.
 613 link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
 614 link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
 615
 616 # How to link against libgcc.  Some libgcc functions, such as those
 617 # for "long long" arithmetic or software floating point, can always be
 618 # built without use of C library headers and do not have any global
 619 # state so can safely be linked statically into any executable or
 620 # shared library requiring them; these functions are in libgcc.a.
 621 # Other functions, relating to exception handling, may require C
 622 # library headers to build and it may not be safe to have more than
 623 # one copy of them in a process; these functions are only in
 624 # libgcc_s.so and libgcc_eh.a.
 625 #
 626 # To avoid circular dependencies when bootstrapping, it is desirable
 627 # to avoid use of libgcc_s and libgcc_eh in building glibc.  Where any
 628 # glibc functionality (in particular, thread cancellation) requires
 629 # exception handling, this is implemented through dlopen of libgcc_s
 630 # to avoid unnecessary dependencies on libgcc_s by programs not using
 631 # that functionality; executables built with glibc do not use
 632 # exception handling other than through thread cancellation.
 633 #
 634 # Undefined references to functions from libgcc_eh or libgcc_s may
 635 # arise for code built with -fexceptions.  In the case of statically
 636 # linked programs installed by glibc, unwinding will never actually
 637 # occur at runtime and the use of elf/static-stubs.c to resolve these
 638 # references is safe.  In the case of statically linked test programs
 639 # and test programs built with -fexceptions, unwinding may occur in
 640 # some cases and it is preferable to link with libgcc_eh or libgcc_s
 641 # so that the testing is as similar as possible to how programs will
 642 # be built with the installed glibc.
 643 #
 644 # Some architectures have architecture-specific systems for exception
 645 # handling that may involve undefined references to
 646 # architecture-specific functions.  On those architectures,
 647 # gnulib-arch and static-gnulib-arch may be defined in sysdeps
 648 # makefiles to use additional libraries for linking executables and
 649 # shared libraries built by glibc.
 650 ifndef gnulib
 651 ifneq ($(have-cc-with-libunwind),yes)
 652   libunwind =
 653 else
 654   libunwind = -lunwind
 655 endif
 656 libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
 657 gnulib-arch =
 658 gnulib = -lgcc $(gnulib-arch)
 659 gnulib-tests := -lgcc $(libgcc_eh)
 660 static-gnulib-arch =
 661 # By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
 662 # statically link programs.  When --disable-shared is used, we use
 663 # -lgcc_eh since elf/static-stubs.o isn't sufficient.
 664 ifeq (yes,$(build-shared))
 665 static-gnulib = -lgcc $(static-gnulib-arch)
 666 else
 667 static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
 668 endif
 669 static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
 670 libc.so-gnulib := -lgcc
 671 endif
 672 +preinit = $(addprefix $(csu-objpfx),crti.o)
 673 +postinit = $(addprefix $(csu-objpfx),crtn.o)
 674 +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
 675 +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 676 # Variants of the two previous definitions for linking PIE programs.
 677 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
 678 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
 679 # Variants of the two previous definitions for statically linking programs.
 680 ifeq (yes,$(enable-static-pie))
 681 # Static PIE must use PIE variants.
 682 +prectorT = $(+prectorS)
 683 +postctorT = $(+postctorS)
 684 else
 685 +prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
 686 +postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 687 endif
 688 csu-objpfx = $(common-objpfx)csu/
 689 elf-objpfx = $(common-objpfx)elf/
 690
 691 # A command that, prepended to the name and arguments of a program,
 692 # and run on the build system, causes that program with those
 693 # arguments to be run on the host for which the library is built.
 694 ifndef test-wrapper
 695 test-wrapper =
 696 endif
 697 # Likewise, but the name of the program is preceded by
 698 # <variable>=<value> assignments for environment variables.
 699 ifndef test-wrapper-env
 700 test-wrapper-env = $(test-wrapper) env
 701 endif
 702 # Likewise, but the program's environment will be empty except for any
 703 # explicit <variable>=<value> assignments preceding the program name.
 704 ifndef test-wrapper-env-only
 705 test-wrapper-env-only = $(test-wrapper) env -i
 706 endif
 707
 708 # Whether to run test programs built for the library's host system.
 709 ifndef run-built-tests
 710 ifeq (yes|,$(cross-compiling)|$(test-wrapper))
 711 run-built-tests = no
 712 else
 713 run-built-tests = yes
 714 endif
 715 endif
 716
 717 # Whether to stop immediately when a test fails.  Nonempty means to
 718 # stop, empty means not to stop.
 719 ifndef stop-on-test-failure
 720 stop-on-test-failure =
 721 endif
 722
 723 # How to run a program we just linked with our library.
 724 # The program binary is assumed to be $(word 2,$^).
 725 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
 726 rtld-prefix = $(elf-objpfx)$(rtld-installed-name)                             \
 727               --library-path                                                  \
 728               $(rpath-link)$(patsubst %,:%,$(sysdep-library-path))
 729 ifeq (yes,$(build-shared))
 730 comma = ,
 731 sysdep-library-path = \
 732 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
 733                                        $(filter -Wl$(comma)-rpath-link=%,\
 734                                                 $(sysdep-LDFLAGS)))))
 735 # $(run-via-rtld-prefix) is a command that, when prepended to the name
 736 # of a program built with the newly built library, produces a command
 737 # that, executed on the host for which the library is built, runs that
 738 # program.  For tests listed in tests-static or xtests-static, it is
 739 # empty.
 740 run-via-rtld-prefix =                                                         \
 741   $(if $(strip $(filter $(notdir $(built-program-file)),                      \
 742                         $(tests-static) $(xtests-static))),, $(rtld-prefix))
 743 else
 744 run-via-rtld-prefix =
 745 endif
 746 # $(run-program-env) is the default environment variable settings to
 747 # use when running a program built with the newly built library.
 748 run-program-env = GCONV_PATH=$(common-objpfx)iconvdata \
 749                   LOCPATH=$(common-objpfx)localedata LC_ALL=C
 750 # $(run-program-prefix) is a command that, when prepended to the name
 751 # of a program built with the newly built library, produces a command
 752 # that, executed on the build system on which "make" is run, runs that
 753 # program.  $(run-program-prefix-before-env) and
 754 # $(run-program-prefix-after-env) are similar, but separate parts
 755 # before and after a list of environment variables.
 756 run-program-prefix-before-env = $(test-wrapper-env)
 757 run-program-prefix-after-env = $(run-via-rtld-prefix)
 758 run-program-prefix = $(run-program-prefix-before-env) $(run-program-env) \
 759                      $(run-program-prefix-after-env)
 760 # $(built-program-cmd) is a command that, executed on the build system
 761 # on which "make" is run, runs the newly built program that is the
 762 # second dependency of the makefile target in which
 763 # $(built-program-cmd) is used.  $(built-program-cmd-before-env) and
 764 # $(built-program-cmd-after-env) are similar, before and after a list
 765 # of environment variables.
 766 built-program-cmd-before-env = $(test-wrapper-env)
 767 built-program-cmd-after-env = $(run-via-rtld-prefix) $(built-program-file)
 768 built-program-cmd = $(built-program-cmd-before-env) $(run-program-env) \
 769                     $(built-program-cmd-after-env)
 770 # $(host-built-program-cmd) is a command that, executed on the host
 771 # for which the library is built, runs the newly built program that is
 772 # the second dependency of the makefile target in which
 773 # $(host-built-program-cmd) is used.
 774 host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
 775
 776 ifndef LD
 777 LD := ld -X
 778 endif
 779
 780 # $(test-via-rtld-prefix) is a command that, when prepended to the name
 781 # of a test program built with the newly built library, produces a command
 782 # that, executed on the host for which the library is built, runs that
 783 # program.  For tests listed in tests-static or xtests-static as well
 784 # as when test programs are hardcoded to the newly built libraries, it
 785 # is empty.
 786
 787 # $(test-program-prefix) is a command that, when prepended to the name
 788 # of a test program built with the newly built library, produces a command
 789 # that, executed on the build system on which "make" is run, runs that
 790 # test program.  $(test-program-prefix-before-env) and
 791 # $(test-program-prefix-after-env) are similar, before and after a
 792 # list of environment variables.
 793
 794 # $(test-program-cmd) is a command that, executed on the build system
 795 # on which "make" is run, runs the newly built test program that is the
 796 # second dependency of the makefile target in which
 797 # $(test-program-cmd) is used.  $(test-program-cmd-before-env) and
 798 # $(test-program-cmd-after-env) are similar, before and after a list
 799 # of environment variables.
 800
 801 # $(host-test-program-cmd) is a command that, executed on the host
 802 # for which the library is built, runs the newly built test program that
 803 # is the second dependency of the makefile target in which
 804 # $(host-test-program-cmd) is used.
 805
 806 ifeq (yes,$(build-hardcoded-path-in-tests))
 807 test-via-rtld-prefix =
 808 test-program-prefix-before-env = $(test-wrapper-env)
 809 test-program-prefix-after-env =
 810 test-program-prefix = $(test-program-prefix-before-env) $(run-program-env) \
 811                       $(test-program-prefix-after-env)
 812 test-program-cmd-before-env = $(test-wrapper-env)
 813 test-program-cmd-after-env = $(built-program-file)
 814 test-program-cmd = $(test-program-cmd-before-env) $(run-program-env) \
 815                    $(test-program-cmd-after-env)
 816 host-test-program-cmd = $(built-program-file)
 817 else
 818 test-via-rtld-prefix = $(run-via-rtld-prefix)
 819 test-program-prefix-before-env = $(run-program-prefix-before-env)
 820 test-program-prefix-after-env = $(run-program-prefix-after-env)
 821 test-program-prefix = $(run-program-prefix)
 822 test-program-cmd-before-env = $(built-program-cmd-before-env)
 823 test-program-cmd-after-env = $(built-program-cmd-after-env)
 824 test-program-cmd = $(built-program-cmd)
 825 host-test-program-cmd = $(host-built-program-cmd)
 826 endif
 827
 828 # Extra flags to pass to GCC.
 829 ifeq ($(all-warnings),yes)
 830 +gccwarn := -Wall -Wwrite-strings -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
 831 else
 832 +gccwarn := -Wall -Wwrite-strings
 833 endif
 834 +gccwarn += -Wundef
 835 ifeq ($(enable-werror),yes)
 836 +gccwarn += -Werror
 837 endif
 838 +gccwarn-c = -Wstrict-prototypes -Wold-style-definition
 839
 840 # We do not depend on the address of constants in different files to be
 841 # actually different, so allow the compiler to merge them all.
 842 +merge-constants = -fmerge-all-constants
 843
 844 # We have to assume that glibc functions are called in any rounding
 845 # mode and also change the rounding mode in a few functions. So,
 846 # disable any optimization that assume default rounding mode.
 847 +math-flags = -frounding-math
 848
 849 # Logically only "libnldbl", "nonlib" and "testsuite" should be using
 850 # -fno-math-errno. However due to GCC bug #88576, only "libm" can use
 851 # -fno-math-errno.
 852 +extra-math-flags = $(if $(filter libm,$(in-module)),-fno-math-errno,-fmath-errno)
 853
 854 # We might want to compile with some stack-protection flag.
 855 ifneq ($(stack-protector),)
 856 +stack-protector=$(stack-protector)
 857 endif
 858
 859 # This is the program that generates makefile dependencies from C source files.
 860 # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
 861 # targets for headers so that removed headers don't break the build.
 862 ifndef +mkdep
 863 +mkdep = $(CC) -M -MP
 864 endif
 865
 866 # The program that makes Emacs-style TAGS files.
 867 ETAGS   := etags
 868
 869 # The `xgettext' program for producing .pot files from sources.
 870 ifndef XGETTEXT
 871 XGETTEXT = xgettext
 872 endif
 873
 874 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
 875 # perhaps others) to preprocess assembly code in some cases.
 876 M4 = m4
 877
 878 # To force installation of files even if they are older than the
 879 # installed files.  This variable is included in the dependency list
 880 # of all installation targets.
 881 ifeq ($(force-install),yes)
 882 +force = force-install
 883 else
 884 +force =
 885 endif
 886
 887 ####
 888 #### End of configuration variables.
 889 ####
 890 \f
 891 # This tells some versions of GNU make before 3.63 not to export all variables.
 892 .NOEXPORT:
 893
 894 # We want to echo the commands we're running without
 895 # umpteen zillion filenames along with it (we use `...' instead)
 896 # but we don't want this echoing done when the user has said
 897 # he doesn't want to see commands echoed by using -s.
 898 ifneq   "$(findstring s,$(MAKEFLAGS))" ""       # if -s
 899 +cmdecho        := echo >/dev/null
 900 else                                            # not -s
 901 +cmdecho        := echo
 902 endif                                           # -s
 903
 904 # These are the flags given to the compiler to tell
 905 # it what sort of optimization and/or debugging output to do.
 906 ifndef  +cflags
 907 # If `CFLAGS' was defined, use that.
 908 ifdef           CFLAGS
 909 +cflags := $(filter-out -I%,$(CFLAGS))
 910 endif           # CFLAGS
 911 endif   # +cflags
 912
 913 # If none of the above worked, default to "-g -O".
 914 ifeq    "$(strip $(+cflags))" ""
 915 +cflags := $(default_cflags)
 916 endif   # $(+cflags) == ""
 917
 918 +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) \
 919            $(+stack-protector)
 920 +gcc-nowarn := -w
 921
 922 # Each sysdeps directory can contain header files that both will be
 923 # used to compile and will be installed.  Each can also contain an
 924 # include/ subdirectory, whose header files will be used to compile
 925 # but will not be installed, and will take precedence over the
 926 # installed files.  This mirrors the top-level include/ subdirectory.
 927 +sysdep-includes := $(foreach dir,$(+sysdep_dirs),\
 928                               $(addprefix -I,$(wildcard $(dir)/include) $(dir)))
 929
 930 # These are flags given to the C compiler to tell it to look for
 931 # include files (including ones given in angle brackets) in the parent
 932 # library source directory, in the include directory, and in the
 933 # current directory.
 934 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
 935             $(+sysdep-includes) $(includes) \
 936             $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
 937
 938 # Since libio has several internal header files, we use a -I instead
 939 # of many little headers in the include directory.
 940 libio-include = -I$(..)libio
 941
 942 # List of non-library modules that we build.
 943 built-modules = iconvprogs iconvdata ldconfig lddlibc4 libmemusage \
 944                 libSegFault libpcprofile librpcsvc locale-programs \
 945                 memusagestat nonlib nscd extramodules libnldbl libsupport \
 946                 testsuite
 947
 948 in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
 949                                     $(libof-$(<F)) \
 950                                     $(libof-$(@F)) \
 951                                     libc))
 952
 953 # Build ld.so, libc.so and libpthread.so with -ftls-model=initial-exec
 954 tls-model = $(if $(filter libpthread rtld \
 955                           libc,$(in-module)),-ftls-model=initial-exec,)
 956
 957 module-cppflags-real = -include $(common-objpfx)libc-modules.h \
 958                        -DMODULE_NAME=$(in-module)
 959
 960 # We don't need libc-modules.h and the MODULE_NAME definition for .v.i
 961 # files.  These targets don't (and will likely never need to) use the IS_IN
 962 # facility.  In fact, shlib-versions should not use it because that will
 963 # create a circular dependency as libc-modules.h is generated from
 964 # shlib-versions.
 965 module-cppflags = $(if $(filter %.v.i,$(@F)),,$(module-cppflags-real))
 966
 967 # These are the variables that the implicit compilation rules use.
 968 # Note that we can't use -std=* in CPPFLAGS, because it overrides
 969 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
 970 # it causes cpp to stop predefining __ASSEMBLER__.
 971 CPPFLAGS = $(config-extra-cppflags) $(CPPUNDEFS) $(CPPFLAGS-config) \
 972            $($(subdir)-CPPFLAGS) \
 973            $(+includes) $(defines) $(module-cppflags) \
 974            -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
 975            $(CPPFLAGS-$(suffix $@)) \
 976            $(foreach lib,$(libof-$(basename $(@F))) \
 977                          $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
 978            $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
 979
 980 ifneq (no,$(have-tunables))
 981 CPPFLAGS += -DTOP_NAMESPACE=glibc
 982 endif
 983
 984 override CFLAGS = -std=gnu11 -fgnu89-inline $(config-extra-cflags) \
 985                   $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
 986                   $(+extra-math-flags) \
 987                   $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
 988                   $(CFLAGS-$(@F)) $(tls-model) \
 989                   $(foreach lib,$(libof-$(basename $(@F))) \
 990                                 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
 991 # Use our copies of cstdlib and cmath.
 992 override CXXFLAGS = -I$(common-objpfx) $(c++-sysincludes) \
 993                     $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
 994                     $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
 995
 996 # If everything is compiled with -fPIC (implicitly) we must tell this by
 997 # defining the PIC symbol.
 998 ifeq (yes,$(build-pic-default))
 999 pic-default = -DPIC
1000 endif
1001
1002 # Enable object files for different versions of the library.
1003 # Various things use $(object-suffixes) to know what all to make.
1004 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
1005 # to pass different flags for each flavor.
1006 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
1007 # .op may be added to all-object-suffixes below.
1008 all-object-suffixes := .o .os .oS
1009 object-suffixes :=
1010 CPPFLAGS-.o = $(pic-default)
1011 # libc.a must be compiled with -fPIE/-fpie for static PIE.
1012 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) $(pie-default)
1013 libtype.o := lib%.a
1014 object-suffixes += .o
1015 ifeq (yes,$(build-shared))
1016 # Under --enable-shared, we will build a shared library of PIC objects.
1017 # The PIC object files are named foo.os.
1018 object-suffixes += .os
1019 CPPFLAGS-.os = -DPIC -DSHARED
1020 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
1021 libtype.os := lib%_pic.a
1022 # This can be changed by a sysdep makefile
1023 pic-ccflag = -fPIC
1024 # This one should always stay like this unless there is a very good reason.
1025 PIC-ccflag = -fPIC
1026 endif
1027 # This can be changed by a sysdep makefile
1028 pie-ccflag = -fpie
1029 # This one should always stay like this unless there is a very good reason.
1030 PIE-ccflag = -fPIE
1031 ifeq (yes,$(build-profile))
1032 # Under --enable-profile, we will build a static library of profiled objects.
1033 # The profiled object files are named foo.op.
1034 all-object-suffixes += .op
1035 object-suffixes += .op
1036 CPPFLAGS-.op = -DPROF $(pic-default)
1037 # libc_p.a must be compiled with -fPIE/-fpie for static PIE.
1038 CFLAGS-.op = -pg $(pie-default)
1039 libtype.op = lib%_p.a
1040 endif
1041
1042 # Convenience variable for when we want to treat shared-library cases
1043 # differently from the rest.
1044 object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
1045
1046 object-suffixes-for-libc := $(object-suffixes)
1047
1048 ifeq (yes,$(build-shared))
1049 # Build special library that contains the static-only routines for libc.
1050 object-suffixes-for-libc += .oS
1051
1052 # Must build the routines as PIC, though, because they can end up in (users')
1053 # shared objects.  We don't want to use CFLAGS-os because users may, for
1054 # example, make that processor-specific.
1055 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag) $(extra-nonshared-cflags)
1056 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
1057 libtype.oS = lib%_nonshared.a
1058 endif
1059
1060 # The assembler can generate debug information too.
1061 ifndef ASFLAGS
1062 ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
1063 endif
1064 override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
1065
1066 ifndef BUILD_CC
1067 BUILD_CC = $(CC)
1068 endif
1069
1070 move-if-change = $(SHELL) $(..)scripts/move-if-change
1071 \f
1072 -include $(common-objpfx)sysd-sorted
1073 subdirs = $(sorted-subdirs)
1074 subdir-srcdirs = $(foreach dir,$(subdirs),\
1075                            $(firstword $($(dir)-srcdir) $(..)$(dir)))
1076
1077 # This is a pair of implicit rules to preprocess a file with # comments,
1078 # %ifdef et al, based on config.h settings or other %include'd files.
1079 # We use chained rules instead of a pipeline here so that we can properly
1080 # check the exit status of cpp rather than using its bad output when there
1081 # is a preprocessing error.  Another rule should depend on the output file
1082 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
1083 # listing both its input files, and any header files that it may reference
1084 # (but no commands).
1085 %.v.i: $(common-objpfx)config.h $(..)Makeconfig
1086         sed '/^[        ]*%/!s/#.*$$//;/^[      ]*$$/d;s/^[     ]*%/#/' \
1087             $(filter-out FORCE %.h $(..)Makeconfig,$^) \
1088         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
1089                    > $@T
1090         mv -f $@T $@
1091 %.v: %.v.i
1092         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
1093         mv -f $@T $@
1094
1095 ifeq (yes, $(build-shared))
1096
1097 # To generate a header to support more than one ABI for different
1098 # architecture variants, the CPU/Makefile defines abi-variants to be a
1099 # list of names for those variants (e.g. 32 64), and, for each variant,
1100 # defines abi-$(variant)-condition to be the condition for those options
1101 # to use in a C #if condition.  abi-includes may be defined to a list of
1102 # headers to include in the generated header, if the default does not
1103 # suffice.  default-abi is defined to be the ABI for the current glibc
1104 # build.
1105
1106 ifndef abi-includes
1107 abi-includes := bits/wordsize.h
1108 endif
1109
1110 # Process the shlib-versions file, which tells us what shared library
1111 # version numbers to use when we install shared objects on this system.
1112 # We need to wait until $(subdirs) is complete.
1113 ifeq ($(sysd-sorted-done),t)
1114 -include $(common-objpfx)soversions.mk
1115 ifndef avoid-generated
1116 $(common-objpfx)shlib-versions.v.i: \
1117         $(wildcard $(+sysdep_dirs:=/shlib-versions) \
1118                    $(subdir-srcdirs:=/shlib-versions)) \
1119         $(..)shlib-versions
1120
1121 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
1122                               $(common-objpfx)shlib-versions.v
1123         $(AWK) -f $^ > $@T
1124         mv -f $@T $@
1125 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
1126         (while read which lib number setname; do \
1127            eval seen_$$which=1; \
1128            test x"$$which" = xDEFAULT || continue; \
1129            case $$number in \
1130              [0-9]*) echo "$$lib.so-version=.$$number"; \
1131                      echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
1132              *)      echo "$$lib.so-version=$$number"; \
1133                      echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
1134            esac; \
1135          done; \
1136          echo soversions.mk-done = t;) < $< > $@T; exit 0
1137         mv -f $@T $@
1138 endif
1139 endif
1140
1141 postclean-generated += soversions.mk soversions.i \
1142                        shlib-versions.v shlib-versions.v.i
1143
1144 before-compile += $(common-objpfx)libc-modules.h
1145 common-generated += libc-modules.h libc-modules.stmp
1146 ifeq ($(soversions.mk-done),t)
1147 # Generate a header with macro definitions for use with the IS_IN macro.
1148 # These are the possible values for the MODULE_NAME macro defined when building
1149 # sources, to identify which module the translation unit is going to be built
1150 # into.
1151 $(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @:
1152 $(common-objpfx)libc-modules.stmp: $(..)scripts/gen-libc-modules.awk \
1153                                    $(common-objpfx)soversions.i
1154         $(AWK) -v buildlist="$(subst -,_,$(built-modules))" -f $^ > ${@:stmp=T}
1155         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1156         touch $@
1157
1158 endif
1159
1160 # Build the tunables list header early since it could be used by any module in
1161 # glibc.
1162 ifneq (no,$(have-tunables))
1163 before-compile += $(common-objpfx)dl-tunable-list.h
1164 common-generated += dl-tunable-list.h dl-tunable-list.stmp
1165
1166 $(common-objpfx)dl-tunable-list.h: $(common-objpfx)dl-tunable-list.stmp; @:
1167 $(common-objpfx)dl-tunable-list.stmp: \
1168                 $(..)scripts/gen-tunables.awk \
1169                 $(..)elf/dl-tunables.list \
1170                 $(wildcard $(subdirs:%=$(..)%/dl-tunables.list)) \
1171                 $(wildcard $(sysdirs:%=%/dl-tunables.list))
1172         $(AWK) -f $^ > ${@:stmp=T}
1173         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1174         touch $@
1175 endif
1176
1177 # Generate version maps, but wait until sysdep-subdirs is known
1178 ifeq ($(sysd-sorted-done),t)
1179 ifeq ($(build-shared),yes)
1180 -include $(common-objpfx)sysd-versions
1181 -include $(common-objpfx)Versions.mk
1182 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
1183 common-generated += $(version-maps)
1184 postclean-generated += sysd-versions Versions.all abi-versions.h \
1185                        Versions.def Versions.v.i Versions.v Versions.mk
1186
1187 ifndef avoid-generated
1188 ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
1189 sysd-versions-force = FORCE
1190 FORCE:
1191 endif
1192
1193 $(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
1194                               $(common-objpfx)Versions.v
1195         LC_ALL=C $(AWK) -f $^ > $@T
1196         mv -f $@T $@
1197
1198 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
1199                               $(common-objpfx)soversions.i \
1200                               $(common-objpfx)Versions.def
1201         { while read which lib version setname; do \
1202             test x"$$which" = xDEFAULT || continue; \
1203             test -z "$$setname" || echo "$$lib : $$setname"; \
1204           done < $(word 2,$^); \
1205           cat $(word 3,$^); \
1206         } | LC_ALL=C $(AWK) -f $< > $@T
1207         mv -f $@T $@
1208 $(common-objpfx)Versions.mk: $(..)scripts/haveversions.awk \
1209                              $(common-objpfx)Versions.all
1210         $(AWK) -f $^ > $@T
1211         mv -f $@T $@
1212 # See %.v/%.v.i implicit rules in Makeconfig.
1213 $(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
1214                               $(wildcard $(sysdirs:%=%/Versions)) \
1215                               $(sysd-versions-force)
1216 $(common-objpfx)sysd-versions: $(common-objpfx)versions.stmp
1217 $(common-objpfx)versions.stmp: $(common-objpfx)Versions.all \
1218                                $(common-objpfx)Versions.v \
1219                                $(..)scripts/versions.awk
1220         ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
1221           cat $(word 2,$^) \
1222           | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
1223                             -v move_if_change='$(move-if-change)' \
1224                             -f $(word 3,$^); \
1225         ) > $(common-objpfx)sysd-versionsT
1226         mv -f $(common-objpfx)sysd-versionsT $(common-objpfx)sysd-versions
1227         touch $@
1228 endif # avoid-generated
1229 endif # $(build-shared) = yes
1230 endif # sysd-sorted-done
1231
1232 # The name under which the run-time dynamic linker is installed.
1233 # We are currently going for the convention that `/lib/ld.so.1'
1234 # names the SVR4/ELF ABI-compliant dynamic linker.
1235 ifndef rtld-installed-name
1236 ifdef ld.so-version
1237 rtld-installed-name = $(ld.so-version)
1238 else
1239 rtld-installed-name = ld.so.1
1240 endif
1241 endif
1242
1243 ifndef rtld-version-installed-name
1244 rtld-version-installed-name = ld-$(version).so
1245 endif
1246
1247 endif # build-shared
1248
1249
1250 ifeq ($(build-shared),yes)
1251 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
1252 else
1253 libdl = $(common-objpfx)dlfcn/libdl.a
1254 endif
1255
1256 ifeq ($(build-shared),yes)
1257 libm = $(common-objpfx)math/libm.so$(libm.so-version)
1258 libmvec = $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version)
1259 else
1260 libm = $(common-objpfx)math/libm.a
1261 libmvec = $(common-objpfx)mathvec/libmvec.a
1262 endif
1263
1264 ifeq ($(build-shared),yes)
1265 libsupport = $(common-objpfx)support/libsupport_nonshared.a
1266 else
1267 libsupport = $(common-objpfx)support/libsupport.a
1268 endif
1269
1270 # This is a partial list of subdirectories containing the library source.
1271 # The order is more or less arbitrary.  The sorting step will take care of the
1272 # dependencies and generate sorted-subdirs dynamically.
1273 all-subdirs = csu assert ctype locale intl catgets math setjmp signal       \
1274               stdlib stdio-common libio malloc string wcsmbs time dirent    \
1275               grp pwd posix io termios resource misc socket sysvipc gmon    \
1276               gnulib iconv iconvdata wctype manual shadow gshadow po argp   \
1277               localedata timezone rt conform debug mathvec support          \
1278               dlfcn elf
1279
1280 ifeq ($(build-crypt),yes)
1281 all-subdirs += crypt
1282 rpath-dirs += crypt
1283 endif
1284
1285 ifndef avoid-generated
1286 # sysd-sorted itself will contain rules making the sysd-sorted target
1287 # depend on Depend files.  But if you just added a Depend file to an
1288 # existing directory not in all-subdirs, then sysd-sorted needs to
1289 # be regenerated, so it depends on existing $(sorted-subdirs:=/Depend) files.
1290 all-Depend-files := $(wildcard $(sort \
1291                         $(foreach dir,$(all-subdirs),\
1292                                   $(firstword $($(dir)-srcdir) \
1293                                   $(..)$(dir))/Depend) \
1294                         $(sorted-subdirs:=/Depend)))
1295 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
1296                              $(common-objpfx)config.make $(..)Makeconfig \
1297                              $(wildcard $(sysdirs:=/Subdirs)) \
1298                              $(all-Depend-files)
1299         $(AWK) -f $< \
1300                -v subdirs='$(all-subdirs)' \
1301                -v srcpfx='$(..)' \
1302                $(filter %/Subdirs %/Depend,$^) > $@-tmp
1303         mv -f $@-tmp $@
1304 $(all-Depend-files): ;
1305 endif
1306
1307 # This gives partial TARGET:SOURCE pattern pairs to have rules
1308 # emitted into sysd-rules.  A sysdeps Makeconfig fragment can
1309 # add its own special object file prefix to this list with e.g. foo-%:%
1310 # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
1311 sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
1312
1313 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
1314 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
1315 ifneq (,$(sysdep-makeconfigs))
1316 include $(sysdep-makeconfigs)
1317 endif
1318
1319 # Compute just the target patterns.  Makeconfig has set sysd-rules-patterns.
1320 sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
1321                                          $(firstword $(subst :, ,$p))))
1322
1323 # A sysdeps Makeconfig fragment may set libc-reentrant to yes.
1324 ifeq (yes,$(libc-reentrant))
1325 defines += -D_LIBC_REENTRANT
1326
1327 libio-mtsafe = -D_IO_MTSAFE_IO
1328 endif
1329
1330 # The name to give to a test in test results summaries.
1331 test-name = $(strip $(patsubst %.out, %, $(patsubst $(common-objpfx)%, %, $@)))
1332
1333 # Likewise, in XFAIL variable names.
1334 test-xfail-name = $(strip $(patsubst %.out, %, $(patsubst $(objpfx)%, %, $@)))
1335
1336 # Command to output a test status line (such as PASS: test-name).  If
1337 # test-xfail-$(test-xfail-name) has a nonempty value, the status will be
1338 # XPASS or XFAIL rather than PASS or FAIL.
1339 evaluate-test = $(..)scripts/evaluate-test.sh $(test-name) $$? \
1340                   $(if $(test-xfail-$(test-xfail-name)),true,false) \
1341                   $(if $(stop-on-test-failure),true,false) \
1342                   > $(common-objpfx)$(test-name).test-result
1343
1344 endif # Makeconfig not yet included
1345
1346 # Local Variables:
1347 # mode: makefile
1348 # End: