Makeconfig

   1 # Copyright (C) 1991-2022 Free Software Foundation, Inc.
   2 # Copyright The GNU Toolchain Authors.
   3 # This file is part of the GNU C Library.
   4
   5 # The GNU C Library is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU Lesser General Public
   7 # License as published by the Free Software Foundation; either
   8 # version 2.1 of the License, or (at your option) any later version.
   9
  10 # The GNU C Library is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # Lesser General Public License for more details.
  14
  15 # You should have received a copy of the GNU Lesser General Public
  16 # License along with the GNU C Library; if not, see
  17 # <https://www.gnu.org/licenses/>.
  18
  19 #
  20 #       Makefile configuration options for the GNU C library.
  21 #
  22 ifneq (,)
  23 This makefile requires GNU Make.
  24 endif
  25
  26 all: # Make this the default goal
  27
  28 ifneq "$(origin +included-Makeconfig)" "file"
  29
  30 +included-Makeconfig := yes
  31
  32 ifdef subdir
  33 .. := ../
  34 endif
  35
  36 # $(common-objdir) is the place to put objects and
  37 # such that are not specific to a single subdir.
  38 ifdef objdir
  39 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
  40 common-objpfx = $(objdir)/
  41 common-objdir = $(objdir)
  42 else
  43 $(error objdir must be defined by the build-directory Makefile)
  44 endif
  45
  46 # Did we request 'make -s' run? "yes" or "no".
  47 # Starting from make-4.4 MAKEFLAGS now contains long
  48 # options like '--shuffle'. To detect presence of 's'
  49 # we pick first word with short options. Long options
  50 # are guaranteed to come after whitespace. We use '-'
  51 # prefix to always have a word before long options
  52 # even if no short options were passed.
  53 # Typical MAKEFLAGS values to watch for:
  54 #   "rs --shuffle=42" (silent)
  55 #   " --shuffle" (not silent)
  56 ifeq ($(findstring s, $(firstword -$(MAKEFLAGS))),)
  57 silent-make := no
  58 else
  59 silent-make := yes
  60 endif
  61
  62 # Root of the sysdeps tree.
  63 sysdep_dir := $(..)sysdeps
  64 export sysdep_dir := $(sysdep_dir)
  65
  66 # Get the values defined by options to `configure'.
  67 include $(common-objpfx)config.make
  68
  69 # What flags to give to sources which call user provided callbacks
  70 uses-callbacks = -fexceptions
  71
  72 # What flags to give to tests which test stack alignment
  73 stack-align-test-flags =
  74
  75 # Complete path to sysdep dirs.
  76 # `configure' writes a definition of `config-sysdirs' in `config.make'.
  77 sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
  78
  79 +sysdep_dirs = $(sysdirs)
  80 ifdef objdir
  81 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
  82 endif
  83
  84 # Run config.status to update config.make and config.h.  We don't show the
  85 # dependence of config.h to Make, because it is only touched when it
  86 # changes and so config.status would be run every time; the dependence of
  87 # config.make should suffice to force regeneration and re-exec, and the new
  88 # image will notice if config.h changed.
  89 $(common-objpfx)config.make: $(common-objpfx)config.status \
  90                              $(..)config.make.in $(..)config.h.in
  91         cd $(<D); $(SHELL) $(<F)
  92
  93 # Find all the sysdeps configure fragments, to make sure we re-run
  94 # configure when any of them changes.
  95 $(common-objpfx)config.status: $(..)version.h $(..)configure \
  96                                $(foreach dir,$(sysdirs),\
  97                                          $(wildcard $(dir)/Implies) \
  98                                          $(patsubst %.ac,%,\
  99                                                     $(firstword $(wildcard \
 100  $(addprefix $(dir)/,configure configure.ac))))) \
 101                                $(patsubst %.ac,%,\
 102  $(wildcard $(..)sysdeps/*/preconfigure $(..)sysdeps/*/preconfigure.ac))
 103         @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
 104          echo The GNU C library has not been configured. >&2; \
 105          echo Run \`configure\' to configure it before building. >&2; \
 106          echo Try \`configure --help\' for more details. >&2; \
 107          exit 1; fi
 108
 109 # We don't want CPPFLAGS to be exported to the command running configure.
 110 unexport CPPFLAGS
 111
 112 # Get the user's configuration parameters.
 113 ifneq ($(wildcard $(..)configparms),)
 114 include $(..)configparms
 115 endif
 116 ifneq ($(objpfx),)
 117 ifneq ($(wildcard $(common-objpfx)configparms),)
 118 include $(common-objpfx)configparms
 119 endif
 120 endif
 121 \f
 122 ####
 123 ####    These are the configuration variables.  You can define values for
 124 ####    the variables below in the file `configparms'.
 125 ####    Do NOT edit this file.
 126 ####
 127
 128
 129 # Common prefix for machine-independent installation directories.
 130 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
 131 prefix = /usr/local
 132 endif
 133
 134 # Decide whether we shall build the programs or not.  We always do this
 135 # unless the user tells us (in configparms) or we are building for a
 136 # standalone target.
 137 ifndef build-programs
 138 ifneq ($(config-os),none)
 139 build-programs=yes
 140 else
 141 build-programs=no
 142 endif
 143 endif
 144
 145 # Common prefix for machine-dependent installation directories.
 146 ifeq ($(origin exec_prefix),undefined)
 147 exec_prefix = $(prefix)
 148 endif
 149
 150 # Where to install the library and object files.
 151 ifndef libdir
 152 libdir = $(exec_prefix)/lib
 153 endif
 154 inst_libdir = $(install_root)$(libdir)
 155
 156 # Compat places to look for libraries
 157 ifndef extra_libdir
 158 extra_libdir = /lib:$(exec_prefix)/lib
 159 endif
 160
 161 # Where to install the shared library.
 162 ifndef slibdir
 163 slibdir = $(exec_prefix)/lib
 164 endif
 165 inst_slibdir = $(install_root)$(slibdir)
 166
 167 # Where to install the dynamic linker.
 168 ifndef rtlddir
 169 rtlddir = $(slibdir)
 170 endif
 171 inst_rtlddir = $(install_root)$(rtlddir)
 172
 173 # Prefix to put on files installed in $(libdir).  For libraries `libNAME.a',
 174 # the prefix is spliced between `lib' and the name, so the linker switch
 175 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
 176 # just prepended to the whole file name.
 177 ifeq ($(origin libprefix),undefined)
 178 libprefix =
 179 endif
 180
 181 # Where to install the header files.
 182 ifndef includedir
 183 includedir = $(prefix)/include
 184 endif
 185 inst_includedir = $(install_root)$(includedir)
 186
 187 # Where to install machine-independent data files.
 188 # These are the timezone database, and the locale database.
 189 ifndef datadir
 190 datadir = $(prefix)/share
 191 endif
 192 inst_datadir = $(install_root)$(datadir)
 193
 194 # Where to install the timezone data files (which are machine-independent).
 195 ifndef zonedir
 196 zonedir = $(datadir)/zoneinfo
 197 endif
 198 inst_zonedir = $(install_root)$(zonedir)
 199
 200 # Where to install the compiled binary locale archive and compiled
 201 # binary locale files.
 202 ifndef complocaledir
 203 complocaledir = $(libdir)/locale
 204 endif
 205 inst_complocaledir = $(install_root)$(complocaledir)
 206
 207 # Where to install the message catalog data files (which are
 208 # machine-independent).
 209 ifndef localedir
 210 localedir = $(datadir)/locale
 211 endif
 212 inst_localedir = $(install_root)$(localedir)
 213
 214 # Where to install the locale charmap source files.
 215 ifndef i18ndir
 216 i18ndir = $(datadir)/i18n
 217 endif
 218 inst_i18ndir = $(install_root)$(i18ndir)
 219
 220 # Where to install the shared object for charset transformation.
 221 ifndef gconvdir
 222 gconvdir = $(libdir)/gconv
 223 endif
 224 inst_gconvdir = $(install_root)$(gconvdir)
 225
 226 # Where to install programs.
 227 ifndef bindir
 228 bindir = $(exec_prefix)/bin
 229 endif
 230 inst_bindir = $(install_root)$(bindir)
 231
 232 # Where to install internal programs.
 233 ifndef libexecdir
 234 libexecdir = $(exec_prefix)/libexec
 235 endif
 236 inst_libexecdir = $(install_root)$(libexecdir)
 237
 238 # Where to install administrative programs.
 239 ifndef rootsbindir
 240 rootsbindir = $(exec_prefix)/sbin
 241 endif
 242 inst_rootsbindir = $(install_root)$(rootsbindir)
 243
 244 ifndef sbindir
 245 sbindir = $(exec_prefix)/sbin
 246 endif
 247 inst_sbindir = $(install_root)$(sbindir)
 248
 249 # Where to install the Info files.
 250 ifndef infodir
 251 infodir = $(prefix)/info
 252 endif
 253 inst_infodir = $(install_root)$(infodir)
 254
 255 # Where to install audit libraries.
 256 ifndef auditdir
 257 auditdir = $(libdir)/audit
 258 endif
 259 inst_auditdir = $(install_root)$(auditdir)
 260
 261 # Where to install default configuration files.  These include the local
 262 # timezone specification and network data base files.
 263 ifndef sysconfdir
 264 sysconfdir = $(prefix)/etc
 265 endif
 266 inst_sysconfdir = $(install_root)$(sysconfdir)
 267
 268 # Directory for the database files and Makefile for nss_db.
 269 ifndef vardbdir
 270 vardbdir = $(localstatedir)/db
 271 endif
 272 inst_vardbdir = $(install_root)$(vardbdir)
 273
 274 # Where to install the "localtime" timezone file; this is the file whose
 275 # contents $(localtime) specifies.  If this is a relative pathname, it is
 276 # relative to $(zonedir).  It is a good idea to put this somewhere
 277 # other than there, so the zoneinfo directory contains only universal data,
 278 # localizing the configuration data elsewhere.
 279 ifndef localtime-file
 280 localtime-file = $(sysconfdir)/localtime
 281 endif
 282
 283 # What to use for leap second specifications in compiling the default
 284 # timezone files.  Set this to `/dev/null' for no leap second handling as
 285 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
 286 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
 287 # This variable determines the default: if it's `/dev/null',
 288 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
 289 ifndef leapseconds
 290 leapseconds = /dev/null
 291 endif
 292
 293 # What timezone's DST rules should be used when a POSIX-style TZ
 294 # environment variable doesn't specify any rules.  For 1003.1 compliance
 295 # this timezone must use rules that are as U.S. federal law defines DST.
 296 # Run `make -C time echo-zonenames' to see a list of available zone names.
 297 # This setting can be changed with `zic -p TIMEZONE' at any time.
 298 # If you want POSIX.1 compatibility, use `America/New_York'.
 299 ifndef posixrules
 300 posixrules = America/New_York
 301 endif
 302
 303 # Where to install the "posixrules" timezone file; this is file
 304 # whose contents $(posixrules) specifies.  If this is a relative
 305 # pathname, it is relative to $(zonedir).
 306 ifndef posixrules-file
 307 posixrules-file = posixrules
 308 endif
 309
 310
 311 # Directory where your system's native header files live.
 312 # This is used on Unix systems to generate some GNU libc header files.
 313 ifndef sysincludedir
 314 sysincludedir = /usr/include
 315 endif
 316
 317
 318 # Commands to install files.
 319 ifndef INSTALL_DATA
 320 INSTALL_DATA = $(INSTALL) -m 644
 321 endif
 322 ifndef INSTALL_SCRIPT
 323 INSTALL_SCRIPT = $(INSTALL)
 324 endif
 325 ifndef INSTALL_PROGRAM
 326 INSTALL_PROGRAM = $(INSTALL)
 327 endif
 328 ifndef INSTALL
 329 INSTALL = install
 330 endif
 331
 332
 333 # The name of the C compiler.
 334 # If you've got GCC, and it works, use it.
 335 ifeq ($(origin CC),default)
 336 CC := gcc
 337 endif
 338
 339 # The name of the C compiler to use for compilations of programs to run on
 340 # the host that is building the library.  If you set CC to a
 341 # cross-compiler, you must set this to the normal compiler.
 342 ifndef BUILD_CC
 343 BUILD_CC = $(CC)
 344 endif
 345
 346 # Default flags to pass the C compiler.
 347 ifndef default_cflags
 348 ifeq ($(release),stable)
 349 default_cflags := -g -O2
 350 else
 351 default_cflags := -g -O
 352 endif
 353 endif
 354
 355 # Flags to pass the C compiler when assembling preprocessed assembly code
 356 # (`.S' files).
 357 ifndef asm-CPPFLAGS
 358 asm-CPPFLAGS =
 359 endif
 360
 361 # Must be supported by the linker.
 362 no-whole-archive = -Wl,--no-whole-archive
 363 whole-archive = -Wl,--whole-archive
 364
 365 # Installed name of the startup code.
 366 # The ELF convention is that the startfile is called crt1.o
 367 start-installed-name = crt1.o
 368 # On systems that do not need a special startfile for statically linked
 369 # binaries, simply set it to the normal name.
 370 ifndef static-start-installed-name
 371 static-start-installed-name = $(start-installed-name)
 372 endif
 373
 374 ifeq (yes,$(enable-static-pie))
 375 # Link with rcrt1.o, instead of crt1.o, to call _dl_relocate_static_pie
 376 # to relocate static PIE.
 377 real-static-start-installed-name = r$(static-start-installed-name)
 378 else
 379 real-static-start-installed-name = $(static-start-installed-name)
 380 endif
 381
 382 relro-LDFLAGS = -Wl,-z,relro
 383 LDFLAGS.so += $(relro-LDFLAGS)
 384 LDFLAGS-rtld += $(relro-LDFLAGS)
 385
 386 # Linker options to enable and disable DT_RELR.
 387 ifeq ($(have-dt-relr),yes)
 388 dt-relr-ldflag = -Wl,-z,pack-relative-relocs
 389 no-dt-relr-ldflag = -Wl,-z,nopack-relative-relocs
 390 else
 391 dt-relr-ldflag =
 392 no-dt-relr-ldflag =
 393 endif
 394
 395 ifeq (no,$(build-pie-default))
 396 pie-default = $(no-pie-ccflag)
 397 else # build-pie-default
 398 pic-default = -DPIC
 399 # Compile libc.a and libc_p.a with -fPIE/-fpie for static PIE.
 400 pie-default = $(pie-ccflag)
 401
 402 ifeq (yes,$(enable-static-pie))
 403 static-pie-dt-relr-ldflag = $(dt-relr-ldflag)
 404 ifeq (yes,$(have-static-pie))
 405 static-pie-ldflag = -static-pie
 406 else
 407 # Static PIE can't have dynamic relocations in read-only segments since
 408 # static PIE is mapped into memory by kernel.  --eh-frame-hdr is needed
 409 # for PIE to support exception.
 410 static-pie-ldflag = -Wl,-pie,--no-dynamic-linker,--eh-frame-hdr,-z,text
 411 endif # have-static-pie
 412 endif # enable-static-pie
 413 endif # build-pie-default
 414
 415 # If lazy relocations are disabled, add the -z now flag.  Use
 416 # LDFLAGS-lib.so instead of LDFLAGS.so, to avoid adding the flag to
 417 # test modules.
 418 ifeq ($(bind-now),yes)
 419 LDFLAGS-lib.so += -Wl,-z,now
 420 # Extra flags for dynamically linked non-test main programs.
 421 link-extra-flags += -Wl,-z,now
 422 endif
 423
 424 # Command to run after every final link (executable or shared object).
 425 # This is invoked with $(call after-link,...), so it should operate on
 426 # the file $1.  This can be set to do some sort of post-processing on
 427 # binaries, or to perform some sort of static sanity check.
 428 ifndef after-link
 429 after-link =
 430 endif
 431
 432 # Additional libraries to link into every test.
 433 link-extra-libs-tests = $(libsupport)
 434
 435 # Command for linking PIE programs with the C library.
 436 ifndef +link-pie
 437 +link-pie-before-inputs = $(if $($(@F)-no-pie),$(no-pie-ldflag),-pie) \
 438              $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(dt-relr-ldflag)) \
 439              -Wl,-O1 -nostdlib -nostartfiles \
 440              $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 441              $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 442              $(firstword $(CRT-$(@F)) $(csu-objpfx)S$(start-installed-name)) \
 443              $(+preinit) $(+prectorS)
 444 +link-pie-before-libc = -o $@ $(+link-pie-before-inputs) \
 445              $(filter-out $(addprefix $(csu-objpfx),start.o \
 446                                                     S$(start-installed-name))\
 447                           $(+preinit) $(link-extra-libs) \
 448                           $(common-objpfx)libc% $(+postinit),$^) \
 449              $(link-extra-libs)
 450 +link-pie-after-libc = $(+postctorS) $(+postinit)
 451 define +link-pie
 452 $(CC) $(link-libc-rpath-link) $(+link-pie-before-libc) $(rtld-LDFLAGS) \
 453   $(link-extra-flags) $(link-libc) $(+link-pie-after-libc)
 454 $(call after-link,$@)
 455 endef
 456 define +link-pie-tests
 457 $(CC) $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
 458   $(+link-pie-after-libc)
 459 $(call after-link,$@)
 460 endef
 461 define +link-pie-printers-tests
 462 $(CC) $(+link-pie-before-libc) $(built-rtld-LDFLAGS) \
 463   $(link-libc-printers-tests) $(+link-pie-after-libc)
 464 $(call after-link,$@)
 465 endef
 466 endif
 467 # Command for statically linking programs with the C library.
 468 ifndef +link-static
 469 +link-static-before-inputs = -nostdlib -nostartfiles -static \
 470               $(if $($(@F)-no-pie),$(no-pie-ldflag),$(static-pie-ldflag)) \
 471               $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(static-pie-dt-relr-ldflag)) \
 472               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F))  \
 473               $(firstword $(CRT-$(@F)) $(csu-objpfx)$(real-static-start-installed-name)) \
 474               $(+preinit) $(+prectorT)
 475 +link-static-before-libc = -o $@ $(+link-static-before-inputs) \
 476               $(filter-out $(addprefix $(csu-objpfx),start.o \
 477                                                      $(start-installed-name))\
 478                            $(+preinit) $(link-extra-libs-static) \
 479                            $(common-objpfx)libc% $(+postinit),$^) \
 480               $(link-extra-libs-static)
 481 +link-static-after-libc = $(+postctorT) $(+postinit)
 482 define +link-static
 483 $(CC) $(+link-static-before-libc) $(link-extra-flags) $(link-libc-static) \
 484   $(+link-static-after-libc)
 485 $(call after-link,$@)
 486 endef
 487 define +link-static-tests
 488 $(CC) $(+link-static-before-libc) $(link-libc-static-tests) \
 489   $(+link-static-after-libc)
 490 $(call after-link,$@)
 491 endef
 492 endif
 493 # Commands for linking programs with the C library.
 494 ifndef +link
 495 ifeq (yes,$(build-shared))
 496 ifeq (yes,$(cc-pie-default))
 497 no-pie-ldflag = -no-pie
 498 endif
 499 ifeq (yes,$(build-pie-default))
 500 +link = $(+link-pie)
 501 +link-tests = $(+link-pie-tests)
 502 +link-tests-before-inputs = $(+link-pie-before-inputs) $(rtld-tests-LDFLAGS)
 503 +link-tests-after-inputs = $(link-libc-tests) $(+link-pie-after-libc)
 504 +link-printers-tests = $(+link-pie-printers-tests)
 505 else  # not build-pie-default
 506 +link-before-inputs = -nostdlib -nostartfiles $(no-pie-ldflag) \
 507               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 508               $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 509               $(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-installed-name)) \
 510               $(+preinit) $(+prector)
 511 +link-before-libc = -o $@ $(+link-before-inputs) \
 512               $(filter-out $(addprefix $(csu-objpfx),start.o \
 513                                                      $(start-installed-name))\
 514                            $(+preinit) $(link-extra-libs) \
 515                            $(common-objpfx)libc% $(+postinit),$^) \
 516               $(link-extra-libs)
 517 +link-after-libc = $(+postctor) $(+postinit)
 518 define +link
 519 $(CC) $(link-libc-rpath-link) $(+link-before-libc) $(rtld-LDFLAGS) \
 520   $(link-extra-flags) $(link-libc) $(+link-after-libc)
 521 $(call after-link,$@)
 522 endef
 523 +link-tests-before-inputs = $(+link-before-inputs) $(rtld-tests-LDFLAGS)
 524 +link-tests-after-inputs = $(link-libc-tests) $(+link-after-libc)
 525 define +link-tests
 526 $(CC) $(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
 527                      $(+link-after-libc)
 528 $(call after-link,$@)
 529 endef
 530 define +link-printers-tests
 531 $(CC) $(+link-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \
 532                      $(+link-after-libc)
 533 $(call after-link,$@)
 534 endef
 535 endif  # build-pie-default
 536 else  # build-static
 537 +link = $(+link-static)
 538 +link-tests = $(+link-static-tests)
 539 +link-tests-before-inputs = $(+link-static-before-inputs)
 540 +link-tests-after-inputs = $(link-libc-static-tests) $(+link-static-after-libc)
 541 +link-printers-tests = $(+link-static-tests)
 542 endif  # build-shared
 543 endif  # +link
 544
 545 # The pretty printer test programs need to be compiled without optimizations
 546 # so they won't confuse gdb.  We could use either the 'GCC optimize' pragma
 547 # or the 'optimize' function attribute to achieve this; however, at least on
 548 # ARM, gcc always produces different debugging symbols when invoked with
 549 # a -O greater than 0 than when invoked with -O0, regardless of anything else
 550 # we're using to suppress optimizations.  Therefore, we need to explicitly pass
 551 # -O0 to it through CFLAGS.
 552 # Additionally, the build system will try to -include $(common-objpfx)/config.h
 553 # when compiling the tests, which will throw an error if some special macros
 554 # (such as __OPTIMIZE__ and IS_IN_build) aren't defined.  To avoid this, we
 555 # tell gcc to define IS_IN_build.
 556 CFLAGS-printers-tests := -O0 -ggdb3 -DIS_IN_build
 557
 558 ifeq (yes,$(build-shared))
 559 # These indicate whether to link using the built ld.so or the installed one.
 560 installed-rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name)
 561 built-rtld-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so
 562
 563 ifndef rtld-LDFLAGS
 564 rtld-LDFLAGS = $(installed-rtld-LDFLAGS)
 565 endif
 566
 567 ifndef rtld-tests-LDFLAGS
 568 ifeq (yes,$(build-hardcoded-path-in-tests))
 569 rtld-tests-LDFLAGS = $(built-rtld-LDFLAGS)
 570 else
 571 rtld-tests-LDFLAGS = $(installed-rtld-LDFLAGS)
 572 endif  # build-hardcoded-path-in-tests
 573 endif  # rtld-tests-LDFLAGS
 574
 575 endif  # build-shared
 576
 577 ifndef link-libc
 578 ifeq (yes,$(build-shared))
 579 # We need the versioned name of libc.so in the deps of $(others) et al
 580 # so that the symlink to libc.so is created before anything tries to
 581 # run the linked programs.
 582 link-libc-rpath = -Wl,-rpath=$(rpath-link)
 583 link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
 584
 585 # For programs which are not tests, $(link-libc-rpath-link) is added
 586 # directly in $(+link), $(+link-pie) above, so that -Wl,-rpath-link
 587 # comes before the expansion of LDLIBS-* and affects libraries added
 588 # there.  For shared objects, -Wl,-rpath-link is added via
 589 # $(build-shlib-helper) and $(build-module-helper) in Makerules (also
 590 # before the expansion of LDLIBS-* variables).
 591
 592 # Tests use -Wl,-rpath instead of -Wl,-rpath-link for
 593 # build-hardcoded-path-in-tests.
 594 ifeq (yes,$(build-hardcoded-path-in-tests))
 595 link-libc-tests-rpath-link = $(link-libc-rpath)
 596 link-test-modules-rpath-link = $(link-libc-rpath)
 597 else
 598 link-libc-tests-rpath-link = $(link-libc-rpath-link)
 599 link-test-modules-rpath-link =
 600 endif  # build-hardcoded-path-in-tests
 601
 602 link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
 603                            $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
 604                            -Wl,--as-needed $(elf-objpfx)ld.so \
 605                            -Wl,--no-as-needed
 606 link-libc = $(link-libc-between-gnulib) $(gnulib)
 607
 608 link-libc-tests-after-rpath-link = $(gnulib-tests) $(link-libc-between-gnulib) $(gnulib-tests)
 609 link-libc-tests = $(link-libc-tests-rpath-link) \
 610                   $(link-libc-tests-after-rpath-link)
 611 # Pretty printer test programs always require rpath instead of rpath-link.
 612 link-libc-printers-tests = $(link-libc-rpath) \
 613                            $(link-libc-tests-after-rpath-link)
 614
 615 # This is how to find at build-time things that will be installed there.
 616 rpath-dirs = math elf dlfcn nss nis rt resolv mathvec support
 617 rpath-link = \
 618 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
 619 else  # build-static
 620 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
 621 link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
 622 endif  # build-shared
 623 endif  # link-libc
 624
 625 # Differences in the linkers on the various platforms.
 626 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
 627 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
 628 LDFLAGS-rdynamic = -rdynamic
 629 LDFLAGS-Bsymbolic = -Bsymbolic
 630
 631 # Choose the default search path for the dynamic linker based on
 632 # where we will install libraries.
 633 ifneq ($(libdir),$(slibdir))
 634 default-rpath = $(slibdir):$(libdir)
 635 else
 636 default-rpath = $(libdir)
 637 endif
 638
 639 ifdef extra_libdir
 640 default-rpath += :$(extra_libdir)
 641 endif
 642
 643 ifndef link-extra-libs
 644 link-extra-libs = $(LDLIBS-$(@F))
 645 link-extra-libs-static = $(link-extra-libs)
 646 endif
 647
 648 # The static libraries.
 649 link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
 650 link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
 651
 652 # How to link against libgcc.  Some libgcc functions, such as those
 653 # for "long long" arithmetic or software floating point, can always be
 654 # built without use of C library headers and do not have any global
 655 # state so can safely be linked statically into any executable or
 656 # shared library requiring them; these functions are in libgcc.a.
 657 # Other functions, relating to exception handling, may require C
 658 # library headers to build and it may not be safe to have more than
 659 # one copy of them in a process; these functions are only in
 660 # libgcc_s.so and libgcc_eh.a.
 661 #
 662 # To avoid circular dependencies when bootstrapping, it is desirable
 663 # to avoid use of libgcc_s and libgcc_eh in building glibc.  Where any
 664 # glibc functionality (in particular, thread cancellation) requires
 665 # exception handling, this is implemented through dlopen of libgcc_s
 666 # to avoid unnecessary dependencies on libgcc_s by programs not using
 667 # that functionality; executables built with glibc do not use
 668 # exception handling other than through thread cancellation.
 669 #
 670 # Undefined references to functions from libgcc_eh or libgcc_s may
 671 # arise for code built with -fexceptions.  In the case of statically
 672 # linked programs installed by glibc, unwinding will never actually
 673 # occur at runtime and the use of elf/static-stubs.c to resolve these
 674 # references is safe.  In the case of statically linked test programs
 675 # and test programs built with -fexceptions, unwinding may occur in
 676 # some cases and it is preferable to link with libgcc_eh or libgcc_s
 677 # so that the testing is as similar as possible to how programs will
 678 # be built with the installed glibc.
 679 #
 680 # Some architectures have architecture-specific systems for exception
 681 # handling that may involve undefined references to
 682 # architecture-specific functions.  On those architectures,
 683 # gnulib-arch and static-gnulib-arch may be defined in sysdeps
 684 # makefiles to use additional libraries for linking executables and
 685 # shared libraries built by glibc.
 686 ifndef gnulib
 687 ifneq ($(have-cc-with-libunwind),yes)
 688   libunwind =
 689 else
 690   libunwind = -lunwind
 691 endif
 692 libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
 693 gnulib-arch =
 694 gnulib = -lgcc $(gnulib-arch)
 695 gnulib-tests := -lgcc $(libgcc_eh)
 696 static-gnulib-arch =
 697 # By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
 698 # statically link programs.  When --disable-shared is used, we use
 699 # -lgcc_eh since elf/static-stubs.o isn't sufficient.
 700 ifeq (yes,$(build-shared))
 701 static-gnulib = -lgcc $(static-gnulib-arch)
 702 else
 703 static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
 704 endif
 705 static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
 706 libc.so-gnulib := -lgcc
 707 endif
 708 +preinit = $(addprefix $(csu-objpfx),crti.o)
 709 +postinit = $(addprefix $(csu-objpfx),crtn.o)
 710 +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
 711 +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 712 # Variants of the two previous definitions for linking PIE programs.
 713 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
 714 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
 715 # Variants of the two previous definitions for statically linking programs.
 716 ifeq (yes,$(enable-static-pie))
 717 # Static PIE must use PIE variants.
 718 +prectorT = $(+prectorS)
 719 +postctorT = $(+postctorS)
 720 else
 721 +prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
 722 +postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 723 endif
 724 csu-objpfx = $(common-objpfx)csu/
 725 elf-objpfx = $(common-objpfx)elf/
 726
 727 # A command that, prepended to the name and arguments of a program,
 728 # and run on the build system, causes that program with those
 729 # arguments to be run on the host for which the library is built.
 730 ifndef test-wrapper
 731 test-wrapper =
 732 endif
 733 # Likewise, but the name of the program is preceded by
 734 # <variable>=<value> assignments for environment variables.
 735 ifndef test-wrapper-env
 736 test-wrapper-env = $(test-wrapper) env
 737 endif
 738 # Likewise, but the program's environment will be empty except for any
 739 # explicit <variable>=<value> assignments preceding the program name.
 740 ifndef test-wrapper-env-only
 741 test-wrapper-env-only = $(test-wrapper) env -i
 742 endif
 743
 744 # Whether to run test programs built for the library's host system.
 745 ifndef run-built-tests
 746 ifeq (yes|,$(cross-compiling)|$(test-wrapper))
 747 run-built-tests = no
 748 else
 749 run-built-tests = yes
 750 endif
 751 endif
 752
 753 # Whether to stop immediately when a test fails.  Nonempty means to
 754 # stop, empty means not to stop.
 755 ifndef stop-on-test-failure
 756 stop-on-test-failure =
 757 endif
 758
 759 # How to run a program we just linked with our library.
 760 # The program binary is assumed to be $(word 2,$^).
 761 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
 762 rtld-prefix = $(elf-objpfx)$(rtld-installed-name)                             \
 763               --library-path                                                  \
 764               $(rpath-link)$(patsubst %,:%,$(sysdep-library-path))
 765 ifeq (yes,$(build-shared))
 766 comma = ,
 767 sysdep-library-path = \
 768 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
 769                                        $(filter -Wl$(comma)-rpath-link=%,\
 770                                                 $(sysdep-LDFLAGS)))))
 771 # $(run-via-rtld-prefix) is a command that, when prepended to the name
 772 # of a program built with the newly built library, produces a command
 773 # that, executed on the host for which the library is built, runs that
 774 # program.  For tests listed in tests-static or xtests-static, it is
 775 # empty.
 776 run-via-rtld-prefix =                                                         \
 777   $(if $(strip $(filter $(notdir $(built-program-file)),                      \
 778                         $(tests-static) $(xtests-static))),, $(rtld-prefix))
 779 else
 780 run-via-rtld-prefix =
 781 endif
 782 # $(run-program-env) is the default environment variable settings to
 783 # use when running a program built with the newly built library.
 784 run-program-env = GCONV_PATH=$(common-objpfx)iconvdata \
 785                   LOCPATH=$(common-objpfx)localedata LC_ALL=C
 786 # $(run-program-prefix) is a command that, when prepended to the name
 787 # of a program built with the newly built library, produces a command
 788 # that, executed on the build system on which "make" is run, runs that
 789 # program.  $(run-program-prefix-before-env) and
 790 # $(run-program-prefix-after-env) are similar, but separate parts
 791 # before and after a list of environment variables.
 792 run-program-prefix-before-env = $(test-wrapper-env)
 793 run-program-prefix-after-env = $(run-via-rtld-prefix)
 794 run-program-prefix = $(run-program-prefix-before-env) $(run-program-env) \
 795                      $(run-program-prefix-after-env)
 796 # $(built-program-cmd) is a command that, executed on the build system
 797 # on which "make" is run, runs the newly built program that is the
 798 # second dependency of the makefile target in which
 799 # $(built-program-cmd) is used.  $(built-program-cmd-before-env) and
 800 # $(built-program-cmd-after-env) are similar, before and after a list
 801 # of environment variables.
 802 built-program-cmd-before-env = $(test-wrapper-env)
 803 built-program-cmd-after-env = $(run-via-rtld-prefix) $(built-program-file)
 804 built-program-cmd = $(built-program-cmd-before-env) $(run-program-env) \
 805                     $(built-program-cmd-after-env)
 806 # $(host-built-program-cmd) is a command that, executed on the host
 807 # for which the library is built, runs the newly built program that is
 808 # the second dependency of the makefile target in which
 809 # $(host-built-program-cmd) is used.
 810 host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
 811 # $(ld-library-path) is the common content to be set in LD_LIBRARY_PATH
 812 # for running static binaries that may load dynamic objects.
 813 ld-library-path = $(objpfx):$(common-objpfx)$(addprefix :,$(sysdep-ld-library-path))
 814
 815 ifndef LD
 816 LD := ld -X
 817 endif
 818
 819 # $(test-via-rtld-prefix) is a command that, when prepended to the name
 820 # of a test program built with the newly built library, produces a command
 821 # that, executed on the host for which the library is built, runs that
 822 # program.  For tests listed in tests-static or xtests-static as well
 823 # as when test programs are hardcoded to the newly built libraries, it
 824 # is empty.
 825
 826 # $(test-program-prefix) is a command that, when prepended to the name
 827 # of a test program built with the newly built library, produces a command
 828 # that, executed on the build system on which "make" is run, runs that
 829 # test program.  $(test-program-prefix-before-env) and
 830 # $(test-program-prefix-after-env) are similar, before and after a
 831 # list of environment variables.
 832
 833 # $(test-program-cmd) is a command that, executed on the build system
 834 # on which "make" is run, runs the newly built test program that is the
 835 # second dependency of the makefile target in which
 836 # $(test-program-cmd) is used.  $(test-program-cmd-before-env) and
 837 # $(test-program-cmd-after-env) are similar, before and after a list
 838 # of environment variables.
 839
 840 # $(host-test-program-cmd) is a command that, executed on the host
 841 # for which the library is built, runs the newly built test program that
 842 # is the second dependency of the makefile target in which
 843 # $(host-test-program-cmd) is used.
 844
 845 ifeq (yes,$(build-hardcoded-path-in-tests))
 846 test-via-rtld-prefix =
 847 test-program-prefix-before-env = $(test-wrapper-env)
 848 test-program-prefix-after-env =
 849 test-program-prefix = $(test-program-prefix-before-env) $(run-program-env) \
 850                       $(test-program-prefix-after-env)
 851 test-program-cmd-before-env = $(test-wrapper-env)
 852 test-program-cmd-after-env = $(built-program-file)
 853 test-program-cmd = $(test-program-cmd-before-env) $(run-program-env) \
 854                    $(test-program-cmd-after-env)
 855 host-test-program-cmd = $(built-program-file)
 856 else
 857 test-via-rtld-prefix = $(run-via-rtld-prefix)
 858 test-program-prefix-before-env = $(run-program-prefix-before-env)
 859 test-program-prefix-after-env = $(run-program-prefix-after-env)
 860 test-program-prefix = $(run-program-prefix)
 861 test-program-cmd-before-env = $(built-program-cmd-before-env)
 862 test-program-cmd-after-env = $(built-program-cmd-after-env)
 863 test-program-cmd = $(built-program-cmd)
 864 host-test-program-cmd = $(host-built-program-cmd)
 865 endif
 866
 867 # Extra flags to pass to GCC.
 868 ifeq ($(all-warnings),yes)
 869 +gccwarn := -Wall -Wwrite-strings -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
 870 else
 871 +gccwarn := -Wall -Wwrite-strings
 872 endif
 873 +gccwarn += -Wundef
 874 ifeq ($(enable-werror),yes)
 875 +gccwarn += -Werror
 876 endif
 877 +gccwarn-c = -Wstrict-prototypes -Wold-style-definition
 878
 879 # We do not depend on the address of constants in different files to be
 880 # actually different, so allow the compiler to merge them all.
 881 +merge-constants = -fmerge-all-constants
 882
 883 # We have to assume that glibc functions are called in any rounding
 884 # mode and also change the rounding mode in a few functions. So,
 885 # disable any optimization that assume default rounding mode.
 886 +math-flags = -frounding-math
 887
 888 # Logically only "libnldbl", "nonlib" and "testsuite" should be using
 889 # -fno-math-errno. However due to GCC bug #88576, only "libm" can use
 890 # -fno-math-errno.
 891 +extra-math-flags = $(if $(filter libm,$(in-module)),-fno-math-errno,-fmath-errno)
 892
 893 # Use 64 bit time_t support for installed programs
 894 installed-modules = nonlib nscd lddlibc4 ldconfig locale_programs \
 895                     iconvprogs libnss_files libnss_compat libnss_db libnss_hesiod \
 896                     libutil libpcprofile libSegFault libnsl
 897 +extra-time-flags = $(if $(filter $(installed-modules),\
 898                            $(in-module)),-D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64)
 899
 900 # We might want to compile with some stack-protection flag.
 901 ifneq ($(stack-protector),)
 902 +stack-protector=$(stack-protector)
 903 endif
 904
 905 # Some routines are unsafe to build with stack-protection since they're called
 906 # before the stack check guard is set up.  Provide a way to disable stack
 907 # protector.  The first argument is the extension (.o, .os, .oS) and the second
 908 # is a list of routines that this path should be applied to.
 909 define elide-stack-protector
 910 $(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-stack-protector))
 911 endef
 912
 913 # The program that makes Emacs-style TAGS files.
 914 ETAGS   := etags
 915
 916 # The `xgettext' program for producing .pot files from sources.
 917 ifndef XGETTEXT
 918 XGETTEXT = xgettext
 919 endif
 920
 921 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
 922 # perhaps others) to preprocess assembly code in some cases.
 923 M4 = m4
 924
 925 # To force installation of files even if they are older than the
 926 # installed files.  This variable is included in the dependency list
 927 # of all installation targets.
 928 ifeq ($(force-install),yes)
 929 +force = force-install
 930 else
 931 +force =
 932 endif
 933
 934 ####
 935 #### End of configuration variables.
 936 ####
 937 \f
 938 # This tells some versions of GNU make before 3.63 not to export all variables.
 939 .NOEXPORT:
 940
 941 # We want to echo the commands we're running without
 942 # umpteen zillion filenames along with it (we use `...' instead)
 943 # but we don't want this echoing done when the user has said
 944 # he doesn't want to see commands echoed by using -s.
 945 ifeq ($(silent-make),yes)                       # if -s
 946 +cmdecho        := echo >/dev/null
 947 else                                            # not -s
 948 +cmdecho        := echo
 949 endif                                           # -s
 950
 951 # These are the flags given to the compiler to tell
 952 # it what sort of optimization and/or debugging output to do.
 953 ifndef  +cflags
 954 # If `CFLAGS' was defined, use that.
 955 ifdef           CFLAGS
 956 +cflags := $(filter-out -I%,$(CFLAGS))
 957 endif           # CFLAGS
 958 endif   # +cflags
 959
 960 # If none of the above worked, default to "-g -O".
 961 ifeq    "$(strip $(+cflags))" ""
 962 +cflags := $(default_cflags)
 963 endif   # $(+cflags) == ""
 964
 965 # Force building with -fno-common because hidden_def, compat_symbol
 966 # and other constructs do not work for common symbols (and would
 967 # otherwise require specifying __attribute__ ((nocommon)) on a
 968 # case-by-case basis).
 969 +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) \
 970            $(+stack-protector) -fno-common
 971 +gcc-nowarn := -w
 972
 973 # Each sysdeps directory can contain header files that both will be
 974 # used to compile and will be installed.  Each can also contain an
 975 # include/ subdirectory, whose header files will be used to compile
 976 # but will not be installed, and will take precedence over the
 977 # installed files.  This mirrors the top-level include/ subdirectory.
 978 +sysdep-includes := $(foreach dir,$(+sysdep_dirs),\
 979                               $(addprefix -I,$(wildcard $(dir)/include) $(dir)))
 980
 981 # These are flags given to the C compiler to tell it to look for
 982 # include files (including ones given in angle brackets) in the parent
 983 # library source directory, in the include directory, and in the
 984 # current directory.
 985 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
 986             $(+sysdep-includes) $(includes) \
 987             $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
 988
 989 # Since libio has several internal header files, we use a -I instead
 990 # of many little headers in the include directory.
 991 libio-include = -I$(..)libio
 992
 993 # List of non-library modules that we build.
 994 built-modules = iconvprogs iconvdata ldconfig lddlibc4 libmemusage \
 995                 libSegFault libpcprofile librpcsvc locale-programs \
 996                 memusagestat nonlib nscd extramodules libnldbl libsupport \
 997                 testsuite testsuite-internal
 998
 999 in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
1000                                     $(libof-$(<F)) \
1001                                     $(libof-$(@F)) \
1002                                     libc))
1003
1004 # Build ld.so, libc.so and libpthread.so with -ftls-model=initial-exec
1005 tls-model = $(if $(filter libpthread rtld \
1006                           libc,$(in-module)),-ftls-model=initial-exec,)
1007
1008 module-cppflags-real = -include $(common-objpfx)libc-modules.h \
1009                        -DMODULE_NAME=$(in-module)
1010
1011 # We don't need libc-modules.h and the MODULE_NAME definition for .v.i
1012 # files.  These targets don't (and will likely never need to) use the IS_IN
1013 # facility.  In fact, shlib-versions should not use it because that will
1014 # create a circular dependency as libc-modules.h is generated from
1015 # shlib-versions.
1016 module-cppflags = $(if $(filter %.mk.i %.v.i,$(@F)),,$(module-cppflags-real))
1017
1018 # These are the variables that the implicit compilation rules use.
1019 # Note that we can't use -std=* in CPPFLAGS, because it overrides
1020 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
1021 # it causes cpp to stop predefining __ASSEMBLER__.
1022 CPPFLAGS = $(config-extra-cppflags) $(CPPUNDEFS) $(CPPFLAGS-config) \
1023            $($(subdir)-CPPFLAGS) \
1024            $(+includes) $(defines) $(module-cppflags) \
1025            -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
1026            $(CPPFLAGS-$(suffix $@)) \
1027            $(foreach lib,$(libof-$(basename $(@F))) \
1028                          $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
1029            $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
1030
1031 ifneq (no,$(have-tunables))
1032 CPPFLAGS += -DTOP_NAMESPACE=glibc
1033 endif
1034
1035 override CFLAGS = -std=gnu11 -fgnu89-inline $(config-extra-cflags) \
1036                   $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
1037                   $(+extra-math-flags) $(+extra-time-flags) \
1038                   $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
1039                   $(CFLAGS-$(@F)) $(tls-model) \
1040                   $(foreach lib,$(libof-$(basename $(@F))) \
1041                                 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
1042 # Use our copies of cstdlib and cmath.
1043 override CXXFLAGS = -I$(common-objpfx) $(c++-sysincludes) \
1044                     $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
1045                     $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
1046
1047 # If everything is compiled with -fPIC (implicitly) we must tell this by
1048 # defining the PIC symbol.
1049 ifeq (yes,$(build-pic-default))
1050 pic-default = -DPIC
1051 endif
1052
1053 # Enable object files for different versions of the library.
1054 # Various things use $(object-suffixes) to know what all to make.
1055 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
1056 # to pass different flags for each flavor.
1057 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
1058 # .op may be added to all-object-suffixes below.
1059 all-object-suffixes := .o .os .oS
1060 object-suffixes :=
1061 CPPFLAGS-.o = $(pic-default)
1062 # libc.a must be compiled with -fPIE/-fpie for static PIE.
1063 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) $(pie-default)
1064 libtype.o := lib%.a
1065 object-suffixes += .o
1066 ifeq (yes,$(build-shared))
1067 # Under --enable-shared, we will build a shared library of PIC objects.
1068 # The PIC object files are named foo.os.
1069 object-suffixes += .os
1070 pic-cppflags = -DPIC -DSHARED
1071 CPPFLAGS-.os = $(pic-cppflags)
1072 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
1073 libtype.os := lib%_pic.a
1074 # This can be changed by a sysdep makefile
1075 pic-ccflag = -fPIC
1076 # This one should always stay like this unless there is a very good reason.
1077 PIC-ccflag = -fPIC
1078 endif
1079 # This can be changed by a sysdep makefile
1080 pie-ccflag = -fpie
1081 no-pie-ccflag = -fno-pie
1082 # This one should always stay like this unless there is a very good reason.
1083 PIE-ccflag = -fPIE
1084 ifeq (yes,$(build-profile))
1085 # Under --enable-profile, we will build a static library of profiled objects.
1086 # The profiled object files are named foo.op.
1087 all-object-suffixes += .op
1088 object-suffixes += .op
1089 CPPFLAGS-.op = -DPROF $(pic-default)
1090 # libc_p.a must be compiled with -fPIE/-fpie for static PIE.
1091 CFLAGS-.op = -pg $(pie-default)
1092 libtype.op = lib%_p.a
1093 endif
1094
1095 # Convenience variable for when we want to treat shared-library cases
1096 # differently from the rest.
1097 object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
1098
1099 object-suffixes-for-libc := $(object-suffixes)
1100
1101 ifeq (yes,$(build-shared))
1102 # Build special library that contains the static-only routines for libc.
1103 object-suffixes-for-libc += .oS
1104
1105 # Must build the routines as PIC, though, because they can end up in (users')
1106 # shared objects.  We don't want to use CFLAGS-os because users may, for
1107 # example, make that processor-specific.
1108 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag) $(extra-nonshared-cflags)
1109 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
1110 libtype.oS = lib%_nonshared.a
1111 endif
1112
1113 # The assembler can generate debug information too.
1114 ifndef ASFLAGS
1115 ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
1116 endif
1117 override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
1118
1119 ifndef BUILD_CC
1120 BUILD_CC = $(CC)
1121 endif
1122
1123 move-if-change = $(SHELL) $(..)scripts/move-if-change
1124 \f
1125 -include $(common-objpfx)sysd-sorted
1126 subdirs = $(sorted-subdirs)
1127 subdir-srcdirs = $(foreach dir,$(subdirs),\
1128                            $(firstword $($(dir)-srcdir) $(..)$(dir)))
1129
1130 # This is a pair of implicit rules to preprocess a file with # comments,
1131 # %ifdef et al, based on config.h settings or other %include'd files.
1132 # We use chained rules instead of a pipeline here so that we can properly
1133 # check the exit status of cpp rather than using its bad output when there
1134 # is a preprocessing error.  Another rule should depend on the output file
1135 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
1136 # listing both its input files, and any header files that it may reference
1137 # (but no commands).
1138 %.v.i: $(common-objpfx)config.h $(..)Makeconfig
1139         sed '/^[        ]*%/!s/#.*$$//;/^[      ]*$$/d;s/^[     ]*%/#/' \
1140             $(filter-out FORCE %.h $(..)Makeconfig,$^) \
1141         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
1142                    > $@T
1143         mv -f $@T $@
1144 %.v: %.v.i
1145         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
1146         mv -f $@T $@
1147
1148 ifeq (yes, $(build-shared))
1149
1150 # To generate a header to support more than one ABI for different
1151 # architecture variants, the CPU/Makefile defines abi-variants to be a
1152 # list of names for those variants (e.g. 32 64), and, for each variant,
1153 # defines abi-$(variant)-condition to be the condition for those options
1154 # to use in a C #if condition.  abi-includes may be defined to a list of
1155 # headers to include in the generated header, if the default does not
1156 # suffice.  default-abi is defined to be the ABI for the current glibc
1157 # build.
1158
1159 ifndef abi-includes
1160 abi-includes := bits/wordsize.h
1161 endif
1162
1163 # Process the shlib-versions file, which tells us what shared library
1164 # version numbers to use when we install shared objects on this system.
1165 # We need to wait until $(subdirs) is complete.
1166 ifeq ($(sysd-sorted-done),t)
1167 -include $(common-objpfx)soversions.mk
1168 ifndef avoid-generated
1169 $(common-objpfx)shlib-versions.v.i: \
1170         $(wildcard $(+sysdep_dirs:=/shlib-versions) \
1171                    $(subdir-srcdirs:=/shlib-versions)) \
1172         $(..)shlib-versions
1173
1174 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
1175                               $(common-objpfx)shlib-versions.v
1176         $(AWK) -f $^ > $@T
1177         mv -f $@T $@
1178 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
1179         (while read which lib number setname; do \
1180            eval seen_$$which=1; \
1181            test x"$$which" = xDEFAULT || continue; \
1182            case $$number in \
1183              [0-9]*) echo "$$lib.so-version=.$$number"; \
1184                      echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
1185              *)      echo "$$lib.so-version=$$number"; \
1186                      echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
1187            esac; \
1188          done; \
1189          echo soversions.mk-done = t;) < $< > $@T; exit 0
1190         mv -f $@T $@
1191 endif
1192 endif
1193
1194 postclean-generated += soversions.mk soversions.i \
1195                        shlib-versions.v shlib-versions.v.i
1196
1197 before-compile += $(common-objpfx)libc-modules.h
1198 common-generated += libc-modules.h libc-modules.stmp
1199 ifeq ($(soversions.mk-done),t)
1200 # Generate a header with macro definitions for use with the IS_IN macro.
1201 # These are the possible values for the MODULE_NAME macro defined when building
1202 # sources, to identify which module the translation unit is going to be built
1203 # into.
1204 $(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @:
1205 $(common-objpfx)libc-modules.stmp: $(..)scripts/gen-libc-modules.awk \
1206                                    $(common-objpfx)soversions.i
1207         $(AWK) -v buildlist="$(subst -,_,$(built-modules))" -f $^ > ${@:stmp=T}
1208         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1209         touch $@
1210
1211 endif
1212
1213 # Build the tunables list header early since it could be used by any module in
1214 # glibc.
1215 ifneq (no,$(have-tunables))
1216 before-compile += $(common-objpfx)dl-tunable-list.h
1217 common-generated += dl-tunable-list.h dl-tunable-list.stmp
1218
1219 $(common-objpfx)dl-tunable-list.h: $(common-objpfx)dl-tunable-list.stmp; @:
1220 $(common-objpfx)dl-tunable-list.stmp: \
1221                 $(..)scripts/gen-tunables.awk \
1222                 $(..)elf/dl-tunables.list \
1223                 $(wildcard $(subdirs:%=$(..)%/dl-tunables.list)) \
1224                 $(wildcard $(sysdirs:%=%/dl-tunables.list))
1225         $(AWK) -f $^ > ${@:stmp=T}
1226         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1227         touch $@
1228 endif
1229
1230 # Dump the GCC macros used by the default compiler flags to a header
1231 # file, so that they can be inspected when using different compiler
1232 # flags.  Add the GCCMACRO prefix to make these macro names unique.
1233 $(common-objpfx)gcc-macros.h.in: $(common-objpfx)config.status
1234         $(CC) $(CFLAGS) $(CPPFLAGS) -E -dM -x c -o $@ /dev/null
1235 $(common-objpfx)gcc-macros.h: $(common-objpfx)gcc-macros.h.in
1236         sed 's/^#define /#define GCCMACRO/' < $< > $@
1237 before-compile += $(common-objpfx)gcc-macros.h
1238
1239 # Generate version maps, but wait until sysdep-subdirs is known
1240 ifeq ($(sysd-sorted-done),t)
1241 ifeq ($(build-shared),yes)
1242 -include $(common-objpfx)sysd-versions
1243 -include $(common-objpfx)Versions.mk
1244 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
1245 common-generated += $(version-maps)
1246 postclean-generated += sysd-versions Versions.all abi-versions.h \
1247                        Versions.def Versions.v.i Versions.v Versions.mk
1248
1249 ifndef avoid-generated
1250 ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
1251 sysd-versions-force = FORCE
1252 FORCE:
1253 endif
1254
1255 $(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
1256                               $(common-objpfx)Versions.v
1257         LC_ALL=C $(AWK) -f $^ > $@T
1258         mv -f $@T $@
1259
1260 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
1261                               $(common-objpfx)soversions.i \
1262                               $(common-objpfx)Versions.def
1263         { while read which lib version setname; do \
1264             test x"$$which" = xDEFAULT || continue; \
1265             test -z "$$setname" || echo "$$lib : $$setname"; \
1266           done < $(word 2,$^); \
1267           cat $(word 3,$^); \
1268         } | LC_ALL=C $(AWK) -f $< > $@T
1269         mv -f $@T $@
1270 $(common-objpfx)Versions.mk: $(..)scripts/haveversions.awk \
1271                              $(common-objpfx)Versions.all
1272         $(AWK) -f $^ > $@T
1273         mv -f $@T $@
1274 # See %.v/%.v.i implicit rules in Makeconfig.
1275 $(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
1276                               $(wildcard $(sysdirs:%=%/Versions)) \
1277                               $(sysd-versions-force)
1278 $(common-objpfx)sysd-versions: $(common-objpfx)versions.stmp
1279 $(common-objpfx)versions.stmp: $(common-objpfx)Versions.all \
1280                                $(common-objpfx)Versions.v \
1281                                $(..)scripts/versions.awk
1282         ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
1283           cat $(word 2,$^) \
1284           | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
1285                             -v move_if_change='$(move-if-change)' \
1286                             -f $(word 3,$^); \
1287         ) > $(common-objpfx)sysd-versionsT
1288         mv -f $(common-objpfx)sysd-versionsT $(common-objpfx)sysd-versions
1289         touch $@
1290 endif # avoid-generated
1291 endif # $(build-shared) = yes
1292
1293 -include $(common-objpfx)time64-compat.mk
1294 postclean-generated += time64-compat.mk
1295
1296 $(common-objpfx)time64-compat.mk: $(common-objpfx)time64-compat.mk.i \
1297                                   $(sysd-versions-force)
1298         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
1299         mv -f $@T $@
1300 $(common-objpfx)time64-compat.mk.i: $(..)Makeconfig
1301         printf "#include <time64-compat.h>\n#ifdef TIME64_NON_DEFAULT\nhave-time64-compat = yes\n#endif" \
1302         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - > $@T
1303         mv -f $@T $@
1304
1305
1306 endif # sysd-sorted-done
1307
1308 # The name under which the run-time dynamic linker is installed.
1309 # We are currently going for the convention that `/lib/ld.so.1'
1310 # names the SVR4/ELF ABI-compliant dynamic linker.
1311 ifndef rtld-installed-name
1312 ifdef ld.so-version
1313 rtld-installed-name = $(ld.so-version)
1314 else
1315 rtld-installed-name = ld.so.1
1316 endif
1317 endif
1318
1319 ifndef rtld-version-installed-name
1320 rtld-version-installed-name = ld-$(version).so
1321 endif
1322
1323 endif # build-shared
1324
1325
1326 ifeq ($(build-shared),yes)
1327 libm = $(common-objpfx)math/libm.so$(libm.so-version)
1328 libmvec = $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version)
1329 else
1330 libm = $(common-objpfx)math/libm.a
1331 libmvec = $(common-objpfx)mathvec/libmvec.a
1332 endif
1333
1334 ifeq ($(build-shared),yes)
1335 libsupport = $(common-objpfx)support/libsupport_nonshared.a
1336 else
1337 libsupport = $(common-objpfx)support/libsupport.a
1338 endif
1339
1340 # This is a partial list of subdirectories containing the library source.
1341 # The order is more or less arbitrary.  The sorting step will take care of the
1342 # dependencies and generate sorted-subdirs dynamically.
1343 all-subdirs = csu assert ctype locale intl catgets math setjmp signal       \
1344               stdlib stdio-common libio malloc string wcsmbs time dirent    \
1345               grp pwd posix io termios resource misc socket sysvipc gmon    \
1346               gnulib iconv iconvdata wctype manual shadow gshadow po argp   \
1347               localedata timezone rt conform debug mathvec support          \
1348               dlfcn elf
1349
1350 ifeq ($(build-crypt),yes)
1351 all-subdirs += crypt
1352 rpath-dirs += crypt
1353 endif
1354
1355 ifndef avoid-generated
1356 # sysd-sorted itself will contain rules making the sysd-sorted target
1357 # depend on Depend files.  But if you just added a Depend file to an
1358 # existing directory not in all-subdirs, then sysd-sorted needs to
1359 # be regenerated, so it depends on existing $(sorted-subdirs:=/Depend) files.
1360 all-Depend-files := $(wildcard $(sort \
1361                         $(foreach dir,$(all-subdirs),\
1362                                   $(firstword $($(dir)-srcdir) \
1363                                   $(..)$(dir))/Depend) \
1364                         $(sorted-subdirs:=/Depend)))
1365 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
1366                              $(common-objpfx)config.make $(..)Makeconfig \
1367                              $(wildcard $(sysdirs:=/Subdirs)) \
1368                              $(all-Depend-files)
1369         $(AWK) -f $< \
1370                -v subdirs='$(all-subdirs)' \
1371                -v srcpfx='$(..)' \
1372                $(filter %/Subdirs %/Depend,$^) > $@-tmp
1373         mv -f $@-tmp $@
1374 $(all-Depend-files): ;
1375 endif
1376
1377 # This gives partial TARGET:SOURCE pattern pairs to have rules
1378 # emitted into sysd-rules.  A sysdeps Makeconfig fragment can
1379 # add its own special object file prefix to this list with e.g. foo-%:%
1380 # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
1381 sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
1382
1383 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
1384 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
1385 ifneq (,$(sysdep-makeconfigs))
1386 include $(sysdep-makeconfigs)
1387 endif
1388
1389 # Compute just the target patterns.  Makeconfig has set sysd-rules-patterns.
1390 sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
1391                                          $(firstword $(subst :, ,$p))))
1392
1393 # $(libpthread-routines-var) and $(librt-routines-var) are the make
1394 # variable to which pthread routines need to be added to land in the
1395 # right library.
1396 ifeq ($(pthread-in-libc),yes)
1397 libpthread-routines-var = routines
1398 librt-routines-var = routines
1399 libanl-routines-var = routines
1400 else
1401 libpthread-routines-var = libpthread-routines
1402 librt-routines-var = librt-routines
1403 libanl-routines-var = libanl-routines
1404 endif
1405
1406 # A sysdeps Makeconfig fragment may set libc-reentrant to yes.
1407 ifeq (yes,$(libc-reentrant))
1408 defines += -D_LIBC_REENTRANT
1409
1410 libio-mtsafe = -D_IO_MTSAFE_IO
1411 endif
1412
1413 # The name to give to a test in test results summaries.
1414 test-name = $(strip $(patsubst %.out, %, $(patsubst $(common-objpfx)%, %, $@)))
1415
1416 # Likewise, in XFAIL variable names.
1417 test-xfail-name = $(strip $(patsubst %.out, %, $(patsubst $(objpfx)%, %, $@)))
1418
1419 # Command to output a test status line (such as PASS: test-name).  If
1420 # test-xfail-$(test-xfail-name) has a nonempty value, the status will be
1421 # XPASS or XFAIL rather than PASS or FAIL.
1422 evaluate-test = $(..)scripts/evaluate-test.sh $(test-name) $$? \
1423                   $(if $(test-xfail-$(test-xfail-name)),true,false) \
1424                   $(if $(stop-on-test-failure),true,false) \
1425                   > $(common-objpfx)$(test-name).test-result
1426
1427 endif # Makeconfig not yet included
1428
1429 # Local Variables:
1430 # mode: makefile
1431 # End: