Makeconfig

   1 # Copyright (C) 1991-2025 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 # Where to install the shared library.
 157 ifndef slibdir
 158 slibdir = $(exec_prefix)/lib
 159 endif
 160 inst_slibdir = $(install_root)$(slibdir)
 161
 162 # Where to install the dynamic linker.
 163 ifndef rtlddir
 164 rtlddir = $(slibdir)
 165 endif
 166 inst_rtlddir = $(install_root)$(rtlddir)
 167
 168 # Prefix to put on files installed in $(libdir).  For libraries `libNAME.a',
 169 # the prefix is spliced between `lib' and the name, so the linker switch
 170 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
 171 # just prepended to the whole file name.
 172 ifeq ($(origin libprefix),undefined)
 173 libprefix =
 174 endif
 175
 176 # Where to install the header files.
 177 ifndef includedir
 178 includedir = $(prefix)/include
 179 endif
 180 inst_includedir = $(install_root)$(includedir)
 181
 182 # Where to install machine-independent data files.
 183 # These are the timezone database, and the locale database.
 184 ifndef datadir
 185 datadir = $(prefix)/share
 186 endif
 187 inst_datadir = $(install_root)$(datadir)
 188
 189 # Where to install the timezone data files (which are machine-independent).
 190 ifndef zonedir
 191 zonedir = $(datadir)/zoneinfo
 192 endif
 193 inst_zonedir = $(install_root)$(zonedir)
 194
 195 # Where to install the compiled binary locale archive and compiled
 196 # binary locale files.
 197 ifndef complocaledir
 198 complocaledir = $(libdir)/locale
 199 endif
 200 inst_complocaledir = $(install_root)$(complocaledir)
 201
 202 # Where to install the message catalog data files (which are
 203 # machine-independent).
 204 ifndef localedir
 205 localedir = $(datadir)/locale
 206 endif
 207 inst_localedir = $(install_root)$(localedir)
 208
 209 # Where to install the locale charmap source files.
 210 ifndef i18ndir
 211 i18ndir = $(datadir)/i18n
 212 endif
 213 inst_i18ndir = $(install_root)$(i18ndir)
 214
 215 # Where to install the shared object for charset transformation.
 216 ifndef gconvdir
 217 gconvdir = $(libdir)/gconv
 218 endif
 219 inst_gconvdir = $(install_root)$(gconvdir)
 220
 221 # Where to install programs.
 222 ifndef bindir
 223 bindir = $(exec_prefix)/bin
 224 endif
 225 inst_bindir = $(install_root)$(bindir)
 226
 227 # Where to install internal programs.
 228 ifndef libexecdir
 229 libexecdir = $(exec_prefix)/libexec
 230 endif
 231 inst_libexecdir = $(install_root)$(libexecdir)
 232
 233 # Where to install administrative programs.
 234 ifndef rootsbindir
 235 rootsbindir = $(exec_prefix)/sbin
 236 endif
 237 inst_rootsbindir = $(install_root)$(rootsbindir)
 238
 239 ifndef sbindir
 240 sbindir = $(exec_prefix)/sbin
 241 endif
 242 inst_sbindir = $(install_root)$(sbindir)
 243
 244 # Where to install the Info files.
 245 ifndef infodir
 246 infodir = $(prefix)/info
 247 endif
 248 inst_infodir = $(install_root)$(infodir)
 249
 250 # Where to install audit libraries.
 251 ifndef auditdir
 252 auditdir = $(libdir)/audit
 253 endif
 254 inst_auditdir = $(install_root)$(auditdir)
 255
 256 # Where to install default configuration files.  These include the local
 257 # timezone specification and network data base files.
 258 ifndef sysconfdir
 259 sysconfdir = $(prefix)/etc
 260 endif
 261 inst_sysconfdir = $(install_root)$(sysconfdir)
 262
 263 # Directory for the database files and Makefile for nss_db.
 264 ifndef vardbdir
 265 vardbdir = $(localstatedir)/db
 266 endif
 267 inst_vardbdir = $(install_root)$(vardbdir)
 268
 269 # Where to install the "localtime" timezone file; this is the file whose
 270 # contents $(localtime) specifies.  If this is a relative pathname, it is
 271 # relative to $(zonedir).  It is a good idea to put this somewhere
 272 # other than there, so the zoneinfo directory contains only universal data,
 273 # localizing the configuration data elsewhere.
 274 ifndef localtime-file
 275 localtime-file = $(sysconfdir)/localtime
 276 endif
 277
 278 # What to use for leap second specifications in compiling the default
 279 # timezone files.  Set this to `/dev/null' for no leap second handling as
 280 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
 281 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
 282 # This variable determines the default: if it's `/dev/null',
 283 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
 284 ifndef leapseconds
 285 leapseconds = /dev/null
 286 endif
 287
 288 # What timezone's DST rules should be used when a POSIX-style TZ
 289 # environment variable doesn't specify any rules.  For 1003.1 compliance
 290 # this timezone must use rules that are as U.S. federal law defines DST.
 291 # Run `make -C time echo-zonenames' to see a list of available zone names.
 292 # This setting can be changed with `zic -p TIMEZONE' at any time.
 293 # If you want POSIX.1 compatibility, use `America/New_York'.
 294 ifndef posixrules
 295 posixrules = America/New_York
 296 endif
 297
 298 # Where to install the "posixrules" timezone file; this is file
 299 # whose contents $(posixrules) specifies.  If this is a relative
 300 # pathname, it is relative to $(zonedir).
 301 ifndef posixrules-file
 302 posixrules-file = posixrules
 303 endif
 304
 305
 306 # Directory where your system's native header files live.
 307 # This is used on Unix systems to generate some GNU libc header files.
 308 ifndef sysincludedir
 309 sysincludedir = /usr/include
 310 endif
 311
 312
 313 # Commands to install files.
 314 ifndef INSTALL_DATA
 315 INSTALL_DATA = $(INSTALL) -m 644
 316 endif
 317 ifndef INSTALL_SCRIPT
 318 INSTALL_SCRIPT = $(INSTALL)
 319 endif
 320 ifndef INSTALL_PROGRAM
 321 INSTALL_PROGRAM = $(INSTALL)
 322 endif
 323 ifndef INSTALL
 324 INSTALL = install
 325 endif
 326
 327
 328 # The name of the C compiler.
 329 # If you've got GCC, and it works, use it.
 330 ifeq ($(origin CC),default)
 331 CC := gcc
 332 endif
 333
 334 # The name of the C compiler to use for compilations of programs to run on
 335 # the host that is building the library.  If you set CC to a
 336 # cross-compiler, you must set this to the normal compiler.
 337 ifndef BUILD_CC
 338 BUILD_CC = $(CC)
 339 endif
 340
 341 # Default flags to pass the C compiler.
 342 ifndef default_cflags
 343 ifeq ($(release),stable)
 344 default_cflags := -g -O2
 345 else
 346 default_cflags := -g -O
 347 endif
 348 endif
 349
 350 # Flags to pass the C compiler when assembling preprocessed assembly code
 351 # (`.S' files).
 352 ifndef asm-CPPFLAGS
 353 asm-CPPFLAGS =
 354 endif
 355
 356 # Must be supported by the linker.
 357 no-whole-archive = -Wl,--no-whole-archive
 358 whole-archive = -Wl,--whole-archive
 359
 360 # Installed name of the startup code.
 361 # The ELF convention is that the startfile is called crt1.o
 362 start-installed-name = crt1.o
 363 # Similar to crt1.o, but without _IO_stdin_used.
 364 start-name-2.0 = crt1-2.0.o
 365 # On systems that do not need a special startfile for statically linked
 366 # binaries, simply set it to the normal name.
 367 ifndef static-start-installed-name
 368 static-start-installed-name = $(start-installed-name)
 369 endif
 370
 371 ifeq (yes,$(enable-static-pie))
 372 # Link with rcrt1.o, instead of crt1.o, to call _dl_relocate_static_pie
 373 # to relocate static PIE.
 374 real-static-start-installed-name = r$(static-start-installed-name)
 375 else
 376 real-static-start-installed-name = $(static-start-installed-name)
 377 endif
 378
 379 relro-LDFLAGS = -Wl,-z,relro
 380 LDFLAGS.so += $(relro-LDFLAGS)
 381 LDFLAGS-rtld += $(relro-LDFLAGS)
 382
 383 # Linker options to enable and disable DT_RELR.
 384 ifeq ($(have-dt-relr),yes)
 385 dt-relr-ldflag = -Wl,-z,pack-relative-relocs
 386 no-dt-relr-ldflag = -Wl,-z,nopack-relative-relocs
 387 else
 388 dt-relr-ldflag =
 389 no-dt-relr-ldflag =
 390 endif
 391
 392 ifeq (no,$(build-pie-default))
 393 pie-default = $(no-pie-ccflag)
 394 else # build-pie-default
 395 pic-default = -DPIC
 396 # Compile libc.a and libc_p.a with -fPIE/-fpie for static PIE.
 397 pie-default = $(pie-ccflag)
 398
 399 ifeq (yes,$(enable-static-pie))
 400 static-pie-dt-relr-ldflag = $(dt-relr-ldflag)
 401 ifeq (yes,$(have-static-pie))
 402 static-pie-ldflag = -static-pie
 403 else
 404 # Static PIE can't have dynamic relocations in read-only segments since
 405 # static PIE is mapped into memory by kernel.  --eh-frame-hdr is needed
 406 # for PIE to support exception.
 407 static-pie-ldflag = -Wl,-pie,--no-dynamic-linker,--eh-frame-hdr,-z,text
 408 endif # have-static-pie
 409 endif # enable-static-pie
 410 endif # build-pie-default
 411
 412 # If lazy relocations are disabled, add the -z now flag.  Use
 413 # LDFLAGS-lib.so instead of LDFLAGS.so, to avoid adding the flag to
 414 # test modules.
 415 ifeq ($(bind-now),yes)
 416 LDFLAGS-lib.so += -Wl,-z,now
 417 # Extra flags for dynamically linked non-test main programs.
 418 link-extra-flags += -Wl,-z,now
 419 endif
 420
 421 # Command to run after every final link (executable or shared object).
 422 # This is invoked with $(call after-link,...), so it should operate on
 423 # the file $1.  This can be set to do some sort of post-processing on
 424 # binaries, or to perform some sort of static sanity check.
 425 ifndef after-link
 426 after-link =
 427 endif
 428
 429 # Additional libraries to link into every test.
 430 link-extra-libs-tests = $(libsupport)
 431
 432 # Command for linking PIE programs with the C library.
 433 ifndef +link-pie
 434 +link-pie-before-inputs = $(if $($(@F)-no-pie),$(no-pie-ldflag),-pie) \
 435              $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(dt-relr-ldflag)) \
 436              -Wl,-O1 -nostdlib -nostartfiles \
 437              $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 438              $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 439              $(firstword $(CRT-$(@F)) $(csu-objpfx)S$(start-installed-name)) \
 440              $(+preinit) $(+prectorS)
 441 +link-pie-before-libc = -o $@ $(+link-pie-before-inputs) \
 442              $(filter-out $(addprefix $(csu-objpfx),start.o \
 443                                                     S$(start-installed-name))\
 444                           $(+preinit) $(link-extra-libs) \
 445                           $(common-objpfx)libc% $(+postinit) \
 446                           $(+nolink-deps),$^) \
 447              $(link-extra-libs)
 448 +link-pie-after-libc = $(+postctorS) $(+postinit)
 449 define +link-pie
 450 $(CC) $(link-libc-rpath-link) $(+link-pie-before-libc) $(rtld-LDFLAGS) \
 451   $(link-extra-flags) $(link-libc) $(+link-pie-after-libc)
 452 $(call after-link,$@)
 453 endef
 454 define +link-pie-tests
 455 $(CC) $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
 456   $(+link-pie-after-libc)
 457 $(call after-link,$@)
 458 endef
 459 define +link-pie-printers-tests
 460 $(CC) $(+link-pie-before-libc) $(built-rtld-LDFLAGS) \
 461   $(link-libc-printers-tests) $(+link-pie-after-libc)
 462 $(call after-link,$@)
 463 endef
 464 endif
 465 # Command for statically linking programs with the C library.
 466 ifndef +link-static
 467 +link-static-before-inputs = -nostdlib -nostartfiles -static \
 468               $(if $($(@F)-no-pie),$(no-pie-ldflag),$(static-pie-ldflag)) \
 469               $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(static-pie-dt-relr-ldflag)) \
 470               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F))  \
 471               $(firstword $(CRT-$(@F)) $(csu-objpfx)$(real-static-start-installed-name)) \
 472               $(+preinit) $(+prectorT)
 473 +link-static-before-libc = -o $@ $(+link-static-before-inputs) \
 474               $(filter-out $(addprefix $(csu-objpfx),start.o \
 475                                                      $(start-installed-name))\
 476                            $(+preinit) $(link-extra-libs-static) \
 477                            $(common-objpfx)libc% $(+postinit) \
 478                            $(+nolink-deps), $^) \
 479               $(link-extra-libs-static)
 480 +link-static-after-libc = $(+postctorT) $(+postinit)
 481 define +link-static
 482 $(CC) $(+link-static-before-libc) $(link-extra-flags) $(link-libc-static) \
 483   $(+link-static-after-libc)
 484 $(call after-link,$@)
 485 endef
 486 define +link-static-tests
 487 $(CC) $(+link-static-before-libc) $(link-libc-static-tests) \
 488   $(+link-static-after-libc)
 489 $(call after-link,$@)
 490 endef
 491 endif
 492 # Commands for linking programs with the C library.
 493 ifndef +link
 494 ifeq (yes,$(build-shared))
 495 ifeq (yes,$(cc-pie-default))
 496 no-pie-ldflag = -no-pie
 497 endif
 498 ifeq (yes,$(build-pie-default))
 499 +link = $(+link-pie)
 500 +link-tests = $(+link-pie-tests)
 501 +link-tests-before-inputs = $(+link-pie-before-inputs) $(rtld-tests-LDFLAGS)
 502 +link-tests-after-inputs = $(link-libc-tests) $(+link-pie-after-libc)
 503 +link-printers-tests = $(+link-pie-printers-tests)
 504 else  # not build-pie-default
 505 +link-before-inputs = -nostdlib -nostartfiles $(no-pie-ldflag) \
 506               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 507               $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 508               $(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-installed-name)) \
 509               $(+preinit) $(+prector)
 510 +link-before-libc = -o $@ $(+link-before-inputs) \
 511               $(filter-out $(addprefix $(csu-objpfx),start.o \
 512                                                      $(start-installed-name))\
 513                            $(+preinit) $(link-extra-libs) \
 514                            $(common-objpfx)libc% $(+postinit) \
 515                            $(+nolink-deps),$^) \
 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 # Command for linking test programs with crt1.o from glibc 2.0.
 546 +link-2.0-before-inputs = -nostdlib -nostartfiles $(no-pie-ldflag) \
 547               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 548               $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 549               $(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-name-2.0)) \
 550               $(+preinit) $(+prector)
 551 +link-2.0-before-libc = -o $@ $(+link-2.0-before-inputs) \
 552               $(filter-out $(addprefix $(csu-objpfx),start.o \
 553                                                      $(start-name-2.0))\
 554                            $(+preinit) $(link-extra-libs) \
 555                            $(common-objpfx)libc% $(+postinit) \
 556                            $(+nolink-deps),$^) \
 557               $(link-extra-libs)
 558 +link-after-libc = $(+postctor) $(+postinit)
 559 define +link-2.0-tests
 560 $(CC) $(+link-2.0-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
 561   $(+link-after-libc)
 562 $(call after-link,$@)
 563 endef
 564
 565 # The pretty printer test programs need to be compiled without optimizations
 566 # so they won't confuse gdb.  We could use either the 'GCC optimize' pragma
 567 # or the 'optimize' function attribute to achieve this; however, at least on
 568 # ARM, gcc always produces different debugging symbols when invoked with
 569 # a -O greater than 0 than when invoked with -O0, regardless of anything else
 570 # we're using to suppress optimizations.  Therefore, we need to explicitly pass
 571 # -O0 to it through CFLAGS. As a result, any fortification needs to be disabled
 572 # as it needs -O greater than 0.
 573 # Additionally, the build system will try to -include $(common-objpfx)/config.h
 574 # when compiling the tests, which will throw an error if some special macros
 575 # (such as __OPTIMIZE__ and IS_IN_build) aren't defined.  To avoid this, we
 576 # tell gcc to define IS_IN_build.
 577 CFLAGS-printers-tests := -O0 -ggdb3 -DIS_IN_build $(no-fortify-source)
 578
 579 ifeq (yes,$(build-shared))
 580 # These indicate whether to link using the built ld.so or the installed one.
 581 installed-rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name)
 582 built-rtld-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so
 583
 584 ifndef rtld-LDFLAGS
 585 rtld-LDFLAGS = $(installed-rtld-LDFLAGS)
 586 endif
 587
 588 ifndef rtld-tests-LDFLAGS
 589 ifeq (yes,$(build-hardcoded-path-in-tests))
 590 rtld-tests-LDFLAGS = $(built-rtld-LDFLAGS)
 591 else
 592 rtld-tests-LDFLAGS = $(installed-rtld-LDFLAGS)
 593 endif  # build-hardcoded-path-in-tests
 594 endif  # rtld-tests-LDFLAGS
 595
 596 endif  # build-shared
 597
 598 ifndef link-libc
 599 ifeq (yes,$(build-shared))
 600 # We need the versioned name of libc.so in the deps of $(others) et al
 601 # so that the symlink to libc.so is created before anything tries to
 602 # run the linked programs.
 603 link-libc-rpath = -Wl,-rpath=$(rpath-link)
 604 link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
 605
 606 # For programs which are not tests, $(link-libc-rpath-link) is added
 607 # directly in $(+link), $(+link-pie) above, so that -Wl,-rpath-link
 608 # comes before the expansion of LDLIBS-* and affects libraries added
 609 # there.  For shared objects, -Wl,-rpath-link is added via
 610 # $(build-shlib-helper) and $(build-module-helper) in Makerules (also
 611 # before the expansion of LDLIBS-* variables).
 612
 613 # Tests use -Wl,-rpath instead of -Wl,-rpath-link for
 614 # build-hardcoded-path-in-tests.  Add -Wl,--disable-new-dtags to force
 615 # DT_RPATH instead of DT_RUNPATH which only applies to DT_NEEDED entries
 616 # in the executable and doesn't applies to DT_NEEDED entries in shared
 617 # libraries which are loaded via DT_NEEDED entries in the executable.
 618 ifeq (yes,$(build-hardcoded-path-in-tests))
 619 link-libc-tests-rpath-link = $(link-libc-rpath) -Wl,--disable-new-dtags
 620 link-test-modules-rpath-link = $(link-libc-rpath) -Wl,--disable-new-dtags
 621 else
 622 link-libc-tests-rpath-link = $(link-libc-rpath-link)
 623 link-test-modules-rpath-link =
 624 endif  # build-hardcoded-path-in-tests
 625
 626 link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
 627                            $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
 628                            -Wl,--as-needed $(elf-objpfx)ld.so \
 629                            -Wl,--no-as-needed
 630 link-libc = $(link-libc-between-gnulib) $(gnulib)
 631
 632 link-libc-tests-after-rpath-link = $(gnulib-tests) $(link-libc-between-gnulib) $(gnulib-tests)
 633 link-libc-tests = $(link-libc-tests-rpath-link) \
 634                   $(link-libc-tests-after-rpath-link)
 635 # Pretty printer test programs always require rpath instead of rpath-link.
 636 link-libc-printers-tests = $(link-libc-rpath) \
 637                            $(link-libc-tests-after-rpath-link)
 638
 639 # This is how to find at build-time things that will be installed there.
 640 rpath-dirs = math elf dlfcn nss nis rt resolv mathvec support misc debug
 641 rpath-link = \
 642 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%))):$(gnulib-extralibdir)
 643 else  # build-static
 644 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
 645 link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
 646 endif  # build-shared
 647 endif  # link-libc
 648
 649 # Differences in the linkers on the various platforms.
 650 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
 651 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
 652 LDFLAGS-rdynamic = -rdynamic
 653 LDFLAGS-Bsymbolic = -Bsymbolic
 654
 655 # Choose the default search path for the dynamic linker based on
 656 # where we will install libraries.
 657 ifneq ($(libdir),$(slibdir))
 658 default-rpath = $(slibdir):$(libdir)
 659 else
 660 default-rpath = $(libdir)
 661 endif
 662
 663 ifndef link-extra-libs
 664 link-extra-libs = $(LDLIBS-$(@F))
 665 link-extra-libs-static = $(link-extra-libs)
 666 endif
 667
 668 # The static libraries.
 669 link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
 670 link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
 671
 672 # How to link against libgcc.  Some libgcc functions, such as those
 673 # for "long long" arithmetic or software floating point, can always be
 674 # built without use of C library headers and do not have any global
 675 # state so can safely be linked statically into any executable or
 676 # shared library requiring them; these functions are in libgcc.a.
 677 # Other functions, relating to exception handling, may require C
 678 # library headers to build and it may not be safe to have more than
 679 # one copy of them in a process; these functions are only in
 680 # libgcc_s.so and libgcc_eh.a.
 681 #
 682 # To avoid circular dependencies when bootstrapping, it is desirable
 683 # to avoid use of libgcc_s and libgcc_eh in building glibc.  Where any
 684 # glibc functionality (in particular, thread cancellation) requires
 685 # exception handling, this is implemented through dlopen of libgcc_s
 686 # to avoid unnecessary dependencies on libgcc_s by programs not using
 687 # that functionality; executables built with glibc do not use
 688 # exception handling other than through thread cancellation.
 689 #
 690 # Undefined references to functions from libgcc_eh or libgcc_s may
 691 # arise for code built with -fexceptions.  In the case of statically
 692 # linked programs installed by glibc, unwinding will never actually
 693 # occur at runtime and the use of elf/static-stubs.c to resolve these
 694 # references is safe.  In the case of statically linked test programs
 695 # and test programs built with -fexceptions, unwinding may occur in
 696 # some cases and it is preferable to link with libgcc_eh or libgcc_s
 697 # so that the testing is as similar as possible to how programs will
 698 # be built with the installed glibc.
 699 # This leads to moderate difficulties, also since distributions may
 700 # install libgcc_s.so in directories only found via ld.so.conf, e.g.
 701 # to be able to switch between gcc versions. We need to add the
 702 # corresponding directory to the library search path to make sure
 703 # our test programs can find it.
 704 #
 705 # Some architectures have architecture-specific systems for exception
 706 # handling that may involve undefined references to
 707 # architecture-specific functions.  On those architectures,
 708 # gnulib-arch and static-gnulib-arch may be defined in sysdeps
 709 # makefiles to use additional libraries for linking executables and
 710 # shared libraries built by glibc.
 711 ifndef gnulib
 712 ifneq ($(have-cc-with-libunwind),yes)
 713   libunwind =
 714 else
 715   libunwind = -lunwind
 716 endif
 717 libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
 718 gnulib-arch =
 719 gnulib = -lgcc $(gnulib-arch)
 720 gnulib-tests := -lgcc $(libgcc_eh)
 721 gnulib-extralibdir = $(shell $(CC) -print-file-name=libgcc_s.so$(libgcc_s.so-version) | sed 's#/[^/]*$$##')
 722 static-gnulib-arch =
 723 # By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
 724 # statically link programs.  When --disable-shared is used, we use
 725 # -lgcc_eh since elf/static-stubs.o isn't sufficient.
 726 ifeq (yes,$(build-shared))
 727 static-gnulib = -lgcc $(static-gnulib-arch)
 728 else
 729 static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
 730 endif
 731 static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
 732 libc.so-gnulib := -lgcc
 733 endif
 734 +preinit = $(addprefix $(csu-objpfx),crti.o)
 735 +postinit = $(addprefix $(csu-objpfx),crtn.o)
 736 +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
 737 +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 738 # Variants of the two previous definitions for linking PIE programs.
 739 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
 740 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
 741 # Variants of the two previous definitions for statically linking programs.
 742 static-prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
 743 static-postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 744 ifeq (yes,$(enable-static-pie))
 745 # Static PIE must use PIE variants.
 746 +prectorT = $(if $($(@F)-no-pie),$(static-prector),$(+prectorS))
 747 +postctorT = $(if $($(@F)-no-pie),$(static-postctor),$(+postctorS))
 748 else
 749 +prectorT = $(static-prector)
 750 +postctorT =$(static-postctor)
 751 endif
 752 csu-objpfx = $(common-objpfx)csu/
 753 elf-objpfx = $(common-objpfx)elf/
 754
 755 # A command that, prepended to the name and arguments of a program,
 756 # and run on the build system, causes that program with those
 757 # arguments to be run on the host for which the library is built.
 758 ifndef test-wrapper
 759 test-wrapper =
 760 endif
 761 # Likewise, but the name of the program is preceded by
 762 # <variable>=<value> assignments for environment variables.
 763 ifndef test-wrapper-env
 764 test-wrapper-env = $(test-wrapper) env
 765 endif
 766 # Likewise, but the program's environment will be empty except for any
 767 # explicit <variable>=<value> assignments preceding the program name.
 768 ifndef test-wrapper-env-only
 769 test-wrapper-env-only = $(test-wrapper) env -i
 770 endif
 771
 772 # Whether to run test programs built for the library's host system.
 773 ifndef run-built-tests
 774 ifeq (yes|,$(cross-compiling)|$(test-wrapper))
 775 run-built-tests = no
 776 else
 777 run-built-tests = yes
 778 endif
 779 endif
 780
 781 # Whether to build the static math tests
 782 ifndef build-math-static-tests
 783 build-math-static-tests = no
 784 endif
 785
 786 # Whether to stop immediately when a test fails.  Nonempty means to
 787 # stop, empty means not to stop.
 788 ifndef stop-on-test-failure
 789 stop-on-test-failure =
 790 endif
 791
 792 # How to run a program we just linked with our library.
 793 # The program binary is assumed to be $(word 2,$^).
 794 # We may require additional libraries from gcc (e.g. libgcc_s.so for exception
 795 # handling), which unfortunately somewhat breaks the isolation.
 796 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
 797 rtld-prefix = $(elf-objpfx)$(rtld-installed-name)                             \
 798               --library-path                                                  \
 799               $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)):$(gnulib-extralibdir)
 800 ifeq (yes,$(build-shared))
 801 comma = ,
 802 sysdep-library-path = \
 803 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
 804                                        $(filter -Wl$(comma)-rpath-link=%,\
 805                                                 $(sysdep-LDFLAGS)))))
 806 # $(run-via-rtld-prefix) is a command that, when prepended to the name
 807 # of a program built with the newly built library, produces a command
 808 # that, executed on the host for which the library is built, runs that
 809 # program.  For tests listed in tests-static or xtests-static, it is
 810 # empty.
 811 run-via-rtld-prefix =                                                         \
 812   $(if $(strip $(filter $(notdir $(built-program-file)),                      \
 813                         $(tests-static) $(xtests-static))),, $(rtld-prefix))
 814 else
 815 run-via-rtld-prefix =
 816 endif
 817 # $(run-program-env) is the default environment variable settings to
 818 # use when running a program built with the newly built library.
 819 run-program-env = GCONV_PATH=$(common-objpfx)iconvdata \
 820                   LOCPATH=$(common-objpfx)localedata LC_ALL=C
 821 # $(run-program-prefix) is a command that, when prepended to the name
 822 # of a program built with the newly built library, produces a command
 823 # that, executed on the build system on which "make" is run, runs that
 824 # program.  $(run-program-prefix-before-env) and
 825 # $(run-program-prefix-after-env) are similar, but separate parts
 826 # before and after a list of environment variables.
 827 run-program-prefix-before-env = $(test-wrapper-env)
 828 run-program-prefix-after-env = $(run-via-rtld-prefix)
 829 run-program-prefix = $(run-program-prefix-before-env) $(run-program-env) \
 830                      $(run-program-prefix-after-env)
 831 # $(built-program-cmd) is a command that, executed on the build system
 832 # on which "make" is run, runs the newly built program that is the
 833 # second dependency of the makefile target in which
 834 # $(built-program-cmd) is used.  $(built-program-cmd-before-env) and
 835 # $(built-program-cmd-after-env) are similar, before and after a list
 836 # of environment variables.
 837 built-program-cmd-before-env = $(test-wrapper-env)
 838 built-program-cmd-after-env = $(run-via-rtld-prefix) $(built-program-file)
 839 built-program-cmd = $(built-program-cmd-before-env) $(run-program-env) \
 840                     $(built-program-cmd-after-env)
 841 # $(host-built-program-cmd) is a command that, executed on the host
 842 # for which the library is built, runs the newly built program that is
 843 # the second dependency of the makefile target in which
 844 # $(host-built-program-cmd) is used.
 845 host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
 846 # $(ld-library-path) is the common content to be set in LD_LIBRARY_PATH
 847 # for running static binaries that may load dynamic objects.
 848 ld-library-path = $(objpfx):$(common-objpfx)$(addprefix :,$(sysdep-ld-library-path))
 849
 850 ifndef LD
 851 LD := ld -X
 852 endif
 853
 854 # $(test-via-rtld-prefix) is a command that, when prepended to the name
 855 # of a test program built with the newly built library, produces a command
 856 # that, executed on the host for which the library is built, runs that
 857 # program.  For tests listed in tests-static or xtests-static as well
 858 # as when test programs are hardcoded to the newly built libraries, it
 859 # is empty.
 860
 861 # $(test-program-prefix) is a command that, when prepended to the name
 862 # of a test program built with the newly built library, produces a command
 863 # that, executed on the build system on which "make" is run, runs that
 864 # test program.  $(test-program-prefix-before-env) and
 865 # $(test-program-prefix-after-env) are similar, before and after a
 866 # list of environment variables.
 867
 868 # $(test-program-cmd) is a command that, executed on the build system
 869 # on which "make" is run, runs the newly built test program that is the
 870 # second dependency of the makefile target in which
 871 # $(test-program-cmd) is used.  $(test-program-cmd-before-env) and
 872 # $(test-program-cmd-after-env) are similar, before and after a list
 873 # of environment variables.
 874
 875 # $(host-test-program-cmd) is a command that, executed on the host
 876 # for which the library is built, runs the newly built test program that
 877 # is the second dependency of the makefile target in which
 878 # $(host-test-program-cmd) is used.
 879
 880 ifeq (yes,$(build-hardcoded-path-in-tests))
 881 test-via-rtld-prefix =
 882 test-program-prefix-before-env = $(test-wrapper-env)
 883 test-program-prefix-after-env =
 884 test-program-prefix = $(test-program-prefix-before-env) $(run-program-env) \
 885                       $(test-program-prefix-after-env)
 886 test-program-cmd-before-env = $(test-wrapper-env)
 887 test-program-cmd-after-env = $(built-program-file)
 888 test-program-cmd = $(test-program-cmd-before-env) $(run-program-env) \
 889                    $(test-program-cmd-after-env)
 890 host-test-program-cmd = $(built-program-file)
 891 else
 892 test-via-rtld-prefix = $(run-via-rtld-prefix)
 893 test-program-prefix-before-env = $(run-program-prefix-before-env)
 894 test-program-prefix-after-env = $(run-program-prefix-after-env)
 895 test-program-prefix = $(run-program-prefix)
 896 test-program-cmd-before-env = $(built-program-cmd-before-env)
 897 test-program-cmd-after-env = $(built-program-cmd-after-env)
 898 test-program-cmd = $(built-program-cmd)
 899 host-test-program-cmd = $(host-built-program-cmd)
 900 endif
 901
 902 # Extra flags to pass to GCC.
 903 +gccwarn := -Wall -Wwrite-strings -Wundef $(cc-option-wimplicit-fallthrough)
 904 ifeq ($(enable-werror),yes)
 905 +gccwarn += -Werror
 906 endif
 907 +gccwarn-c = -Wstrict-prototypes -Wold-style-definition \
 908   $(cc-option-wfree-labels) $(cc-option-wmissing-parameter-name)
 909
 910 # We do not depend on the address of constants in different files to be
 911 # actually different, so allow the compiler to merge them all.
 912 +merge-constants = -fmerge-all-constants
 913
 914 # We have to assume that glibc functions are called in any rounding
 915 # mode and also change the rounding mode in a few functions. So,
 916 # disable any optimization that assume default rounding mode.
 917 +math-flags = -frounding-math
 918
 919 # Logically only "libnldbl", "nonlib" and "testsuite" should be using
 920 # -fno-math-errno. However due to GCC bug #88576, only "libm" and
 921 # "libmvec" can use -fno-math-errno.
 922 +extra-math-flags = $(if $(filter libmvec libm,$(in-module)),\
 923                       -fno-math-errno,-fmath-errno)
 924
 925 # Use 64 bit time_t support for installed programs
 926 installed-modules = nonlib nscd ldconfig locale_programs \
 927                     iconvprogs libnss_files libnss_compat libnss_db libnss_hesiod \
 928                     libutil libpcprofile libnsl
 929 +extra-time-flags = $(if $(filter $(installed-modules),\
 930                            $(in-module)),-D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64)
 931
 932 # We might want to compile with some stack-protection flag.
 933 ifneq ($(stack-protector),)
 934 +stack-protector=$(stack-protector)
 935 endif
 936
 937 # Some routines are unsafe to build with stack-protection since they're called
 938 # before the stack check guard is set up.  Provide a way to disable stack
 939 # protector.  The first argument is the extension (.o, .os, .oS) and the second
 940 # is a list of routines that this path should be applied to.
 941 define elide-stack-protector
 942 $(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-stack-protector))
 943 endef
 944
 945 # We might want to compile with fortify-source
 946 ifneq ($(fortify-source),)
 947 +fortify-source=$(fortify-source)
 948 endif
 949
 950 # Some routine can't be fortified like the ones used by fortify
 951 define elide-fortify-source
 952 $(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-fortify-source))
 953 endef
 954
 955 # The program that makes Emacs-style TAGS files.
 956 ETAGS   := etags
 957
 958 # The `xgettext' program for producing .pot files from sources.
 959 ifndef XGETTEXT
 960 XGETTEXT = xgettext
 961 endif
 962
 963 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
 964 # perhaps others) to preprocess assembly code in some cases.
 965 M4 = m4
 966
 967 # To force installation of files even if they are older than the
 968 # installed files.  This variable is included in the dependency list
 969 # of all installation targets.
 970 ifeq ($(force-install),yes)
 971 +force = force-install
 972 else
 973 +force =
 974 endif
 975
 976 ####
 977 #### End of configuration variables.
 978 ####
 979 \f
 980 # This tells some versions of GNU make before 3.63 not to export all variables.
 981 .NOEXPORT:
 982
 983 # We want to echo the commands we're running without
 984 # umpteen zillion filenames along with it (we use `...' instead)
 985 # but we don't want this echoing done when the user has said
 986 # he doesn't want to see commands echoed by using -s.
 987 ifeq ($(silent-make),yes)                       # if -s
 988 +cmdecho        := echo >/dev/null
 989 else                                            # not -s
 990 +cmdecho        := echo
 991 endif                                           # -s
 992
 993 # These are the flags given to the compiler to tell
 994 # it what sort of optimization and/or debugging output to do.
 995 ifndef  +cflags
 996 # If `CFLAGS' was defined, use that.
 997 ifdef           CFLAGS
 998 +cflags := $(filter-out -I%,$(CFLAGS))
 999 endif           # CFLAGS
1000 endif   # +cflags
1001
1002 # If none of the above worked, default to "-g -O".
1003 ifeq    "$(strip $(+cflags))" ""
1004 +cflags := $(default_cflags)
1005 endif   # $(+cflags) == ""
1006
1007 # Force building with -fno-common because hidden_def, compat_symbol
1008 # and other constructs do not work for common symbols (and would
1009 # otherwise require specifying __attribute__ ((nocommon)) on a
1010 # case-by-case basis).
1011 +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) \
1012            $(+stack-protector) -fno-common
1013 +gcc-nowarn := -w
1014
1015 # We must filter out elf because the early bootstrap of the dynamic loader
1016 # cannot be fortified. Likewise we exclude dlfcn because it is entangled
1017 # with the loader. We must filter out csu because early startup, like the
1018 # loader, cannot be fortified. Lastly debug is the fortification routines
1019 # themselves and they cannot be fortified.
1020 do-fortify = $(filter-out elf dlfcn csu debug,$(subdir))
1021 ifeq ($(do-fortify),$(subdir))
1022 +cflags += $(+fortify-source)
1023 else
1024 +cflags += $(no-fortify-source)
1025 endif
1026
1027 # Filter out LFS flags if compiler defines it by default.
1028 +cflags += $(no-file-offset-bits-source)
1029
1030 # Filter out 64 bit time_t flags if compiler defines it by default.
1031 +cflags += $(no-time-bits-source)
1032
1033 # Each sysdeps directory can contain header files that both will be
1034 # used to compile and will be installed.  Each can also contain an
1035 # include/ subdirectory, whose header files will be used to compile
1036 # but will not be installed, and will take precedence over the
1037 # installed files.  This mirrors the top-level include/ subdirectory.
1038 +sysdep-includes := $(foreach dir,$(+sysdep_dirs),\
1039                               $(addprefix -I,$(wildcard $(dir)/include) $(dir)))
1040
1041 # These are flags given to the C compiler to tell it to look for
1042 # include files (including ones given in angle brackets) in the parent
1043 # library source directory, in the include directory, and in the
1044 # current directory.
1045 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
1046             $(+sysdep-includes) $(includes) \
1047             $(patsubst %/,-I%,$(..)) $(libio-include) \
1048             $(if $($(<F)-no-include-dot),,-I.) $(sysincludes)
1049
1050 # Since libio has several internal header files, we use a -I instead
1051 # of many little headers in the include directory.
1052 libio-include = -I$(..)libio
1053
1054 # List of non-library modules that we build.
1055 built-modules = iconvprogs iconvdata ldconfig libmemusage \
1056                 libpcprofile librpcsvc locale-programs \
1057                 memusagestat nonlib nscd extramodules libnldbl libsupport \
1058                 testsuite testsuite-internal
1059
1060 in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
1061                                     $(libof-$(<F)) \
1062                                     $(libof-$(@F)) \
1063                                     libc))
1064
1065 # Build ld.so, libc.so and libpthread.so with -ftls-model=initial-exec
1066 tls-model = $(if $(filter libpthread rtld \
1067                           libc,$(in-module)),-ftls-model=initial-exec,)
1068
1069 module-cppflags-real = -include $(common-objpfx)libc-modules.h \
1070                        -DMODULE_NAME=$(in-module)
1071
1072 # We don't need libc-modules.h and the MODULE_NAME definition for .v.i
1073 # files.  These targets don't (and will likely never need to) use the IS_IN
1074 # facility.  In fact, shlib-versions should not use it because that will
1075 # create a circular dependency as libc-modules.h is generated from
1076 # shlib-versions.
1077 module-cppflags = $(if $(filter %.mk.i %.v.i,$(@F)),,$(module-cppflags-real))
1078
1079 # These are the variables that the implicit compilation rules use.
1080 # Note that we can't use -std=* in CPPFLAGS, because it overrides
1081 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
1082 # it causes cpp to stop predefining __ASSEMBLER__.
1083 CPPFLAGS = $(config-extra-cppflags) $(CPPFLAGS-config) \
1084            $($(subdir)-CPPFLAGS) \
1085            $(+includes) $(defines) $(module-cppflags) \
1086            -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
1087            $(CPPFLAGS-$(suffix $@)) \
1088            $(foreach lib,$(libof-$(basename $(@F))) \
1089                          $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
1090            $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F))) \
1091            -DTOP_NAMESPACE=glibc
1092
1093 override CFLAGS = -std=gnu11 -fgnu89-inline $(config-extra-cflags) \
1094                   $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
1095                   $(+extra-math-flags) $(+extra-time-flags) \
1096                   $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
1097                   $(CFLAGS-$(@F)) $(tls-model) \
1098                   $(foreach lib,$(libof-$(basename $(@F))) \
1099                                 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
1100 # Use our copies of cstdlib and cmath.
1101 override CXXFLAGS = -I$(common-objpfx) $(c++-sysincludes) \
1102                     $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
1103                     $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
1104
1105 # If everything is compiled with -fPIC (implicitly) we must tell this by
1106 # defining the PIC symbol.
1107 ifeq (yes,$(build-pic-default))
1108 pic-default = -DPIC
1109 endif
1110
1111 # Enable object files for different versions of the library.
1112 # Various things use $(object-suffixes) to know what all to make.
1113 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
1114 # to pass different flags for each flavor.
1115 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
1116 # .op may be added to all-object-suffixes below.
1117 all-object-suffixes := .o .os .oS
1118 object-suffixes :=
1119 CPPFLAGS-.o = $(pic-default)
1120 # libc.a must be compiled with -fPIE/-fpie for static PIE.
1121 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) $(pie-default)
1122 CFLAGS-.o += $(call elide-fortify-source,.o,$(routines_no_fortify))
1123 CFLAGS-.o += $(call elide-fortify-source,_chk.o,$(routines_no_fortify))
1124 libtype.o := lib%.a
1125 object-suffixes += .o
1126 ifeq (yes,$(build-shared))
1127 # Under --enable-shared, we will build a shared library of PIC objects.
1128 # The PIC object files are named foo.os.
1129 object-suffixes += .os
1130 pic-cppflags = -DPIC -DSHARED
1131 CPPFLAGS-.os = $(pic-cppflags)
1132 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
1133 CFLAGS-.os += $(call elide-fortify-source,.os,$(routines_no_fortify))
1134 CFLAGS-.os += $(call elide-fortify-source,_chk.os,$(routines_no_fortify))
1135 libtype.os := lib%_pic.a
1136 # This can be changed by a sysdep makefile
1137 pic-ccflag = -fPIC
1138 # This one should always stay like this unless there is a very good reason.
1139 PIC-ccflag = -fPIC
1140 endif
1141 # This can be changed by a sysdep makefile
1142 pie-ccflag = -fPIE
1143 no-pie-ccflag = -fno-pie
1144 # This one should always stay like this unless there is a very good reason.
1145 PIE-ccflag = -fPIE
1146 ifeq (yes,$(build-profile))
1147 # Under --enable-profile, we will build a static library of profiled objects.
1148 # The profiled object files are named foo.op.
1149 all-object-suffixes += .op
1150 object-suffixes += .op
1151 CPPFLAGS-.op = -DPROF $(pic-default)
1152 # libc_p.a must be compiled with -fPIE/-fpie for static PIE.
1153 CFLAGS-.op = -pg $(pie-default)
1154 CFLAGS-.op += $(call elide-fortify-source,.op,$(routines_no_fortify))
1155 CFLAGS-.op += $(call elide-fortify-source,_chk.op,$(routines_no_fortify))
1156 libtype.op = lib%_p.a
1157 endif
1158
1159 # Convenience variable for when we want to treat shared-library cases
1160 # differently from the rest.
1161 object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
1162
1163 object-suffixes-for-libc := $(object-suffixes)
1164
1165 ifeq (yes,$(build-shared))
1166 # Build special library that contains the static-only routines for libc.
1167 object-suffixes-for-libc += .oS
1168
1169 # Must build the routines as PIC, though, because they can end up in (users')
1170 # shared objects.  We don't want to use CFLAGS-os because users may, for
1171 # example, make that processor-specific.
1172 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag) $(extra-nonshared-cflags)
1173 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
1174 libtype.oS = lib%_nonshared.a
1175 endif
1176
1177 # The assembler can generate debug information too.
1178 ifndef ASFLAGS
1179 ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
1180 endif
1181 override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
1182
1183 move-if-change = $(SHELL) $(..)scripts/move-if-change
1184 \f
1185 -include $(common-objpfx)sysd-sorted
1186 subdirs = $(sorted-subdirs)
1187 subdir-srcdirs = $(foreach dir,$(subdirs),\
1188                            $(firstword $($(dir)-srcdir) $(..)$(dir)))
1189
1190 # This is a pair of implicit rules to preprocess a file with # comments,
1191 # %ifdef et al, based on config.h settings or other %include'd files.
1192 # We use chained rules instead of a pipeline here so that we can properly
1193 # check the exit status of cpp rather than using its bad output when there
1194 # is a preprocessing error.  Another rule should depend on the output file
1195 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
1196 # listing both its input files, and any header files that it may reference
1197 # (but no commands).
1198 %.v.i: $(common-objpfx)config.h $(..)Makeconfig
1199         sed '/^[        ]*%/!s/#.*$$//;/^[      ]*$$/d;s/^[     ]*%/#/' \
1200             $(filter-out FORCE %.h $(..)Makeconfig,$^) \
1201         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
1202                    > $@T
1203         mv -f $@T $@
1204 %.v: %.v.i
1205         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
1206         mv -f $@T $@
1207
1208 ifeq (yes, $(build-shared))
1209
1210 # To generate a header to support more than one ABI for different
1211 # architecture variants, the CPU/Makefile defines abi-variants to be a
1212 # list of names for those variants (e.g. 32 64), and, for each variant,
1213 # defines abi-$(variant)-condition to be the condition for those options
1214 # to use in a C #if condition.  abi-includes may be defined to a list of
1215 # headers to include in the generated header, if the default does not
1216 # suffice.  default-abi is defined to be the ABI for the current glibc
1217 # build.
1218
1219 ifndef abi-includes
1220 abi-includes := bits/wordsize.h
1221 endif
1222
1223 # Process the shlib-versions file, which tells us what shared library
1224 # version numbers to use when we install shared objects on this system.
1225 # We need to wait until $(subdirs) is complete.
1226 ifeq ($(sysd-sorted-done),t)
1227 -include $(common-objpfx)soversions.mk
1228 ifndef avoid-generated
1229 $(common-objpfx)shlib-versions.v.i: \
1230         $(wildcard $(+sysdep_dirs:=/shlib-versions) \
1231                    $(subdir-srcdirs:=/shlib-versions)) \
1232         $(..)shlib-versions
1233
1234 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
1235                               $(common-objpfx)shlib-versions.v
1236         $(AWK) -f $^ > $@T
1237         mv -f $@T $@
1238 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
1239         (while read which lib number setname; do \
1240            eval seen_$$which=1; \
1241            test x"$$which" = xDEFAULT || continue; \
1242            case $$number in \
1243              [0-9]*) echo "$$lib.so-version=.$$number"; \
1244                      echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
1245              *)      echo "$$lib.so-version=$$number"; \
1246                      echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
1247            esac; \
1248          done; \
1249          echo soversions.mk-done = t;) < $< > $@T; exit 0
1250         mv -f $@T $@
1251 endif
1252 endif
1253
1254 postclean-generated += soversions.mk soversions.i \
1255                        shlib-versions.v shlib-versions.v.i
1256
1257 before-compile += $(common-objpfx)libc-modules.h
1258 common-generated += libc-modules.h libc-modules.stmp
1259 ifeq ($(soversions.mk-done),t)
1260 # Generate a header with macro definitions for use with the IS_IN macro.
1261 # These are the possible values for the MODULE_NAME macro defined when building
1262 # sources, to identify which module the translation unit is going to be built
1263 # into.
1264 $(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @:
1265 $(common-objpfx)libc-modules.stmp: $(..)scripts/gen-libc-modules.awk \
1266                                    $(common-objpfx)soversions.i
1267         $(AWK) -v buildlist="$(subst -,_,$(built-modules))" -f $^ > ${@:stmp=T}
1268         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1269         touch $@
1270
1271 endif
1272
1273 # Build the tunables list header early since it could be used by any module in
1274 # glibc.
1275 before-compile += $(common-objpfx)dl-tunable-list.h
1276 common-generated += dl-tunable-list.h dl-tunable-list.stmp
1277
1278 $(common-objpfx)dl-tunable-list.h: $(common-objpfx)dl-tunable-list.stmp; @:
1279 $(common-objpfx)dl-tunable-list.stmp: \
1280                 $(..)scripts/gen-tunables.awk \
1281                 $(..)elf/dl-tunables.list \
1282                 $(wildcard $(subdirs:%=$(..)%/dl-tunables.list)) \
1283                 $(wildcard $(sysdirs:%=%/dl-tunables.list))
1284         LC_ALL=C $(AWK) -f $^ > ${@:stmp=T}
1285         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1286         touch $@
1287
1288 # Dump the GCC macros used by the default compiler flags to a header
1289 # file, so that they can be inspected when using different compiler
1290 # flags.  Add the GCCMACRO prefix to make these macro names unique.
1291 $(common-objpfx)gcc-macros.h.in: $(common-objpfx)config.status
1292         $(CC) $(CFLAGS) $(CPPFLAGS) -E -dM -x c -o $@ /dev/null
1293 $(common-objpfx)gcc-macros.h: $(common-objpfx)gcc-macros.h.in
1294         sed 's/^#define /#define GCCMACRO/' < $< > $@
1295 before-compile += $(common-objpfx)gcc-macros.h
1296
1297 # Generate version maps, but wait until sysdep-subdirs is known
1298 ifeq ($(sysd-sorted-done),t)
1299 ifeq ($(build-shared),yes)
1300 -include $(common-objpfx)sysd-versions
1301 -include $(common-objpfx)Versions.mk
1302 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
1303 common-generated += $(version-maps)
1304 postclean-generated += sysd-versions Versions.all abi-versions.h \
1305                        Versions.def Versions.v.i Versions.v Versions.mk
1306
1307 ifndef avoid-generated
1308 ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
1309 sysd-versions-force = FORCE
1310 FORCE:
1311 endif
1312
1313 $(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
1314                               $(common-objpfx)Versions.v
1315         LC_ALL=C $(AWK) -f $^ > $@T
1316         mv -f $@T $@
1317
1318 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
1319                               $(common-objpfx)soversions.i \
1320                               $(common-objpfx)Versions.def
1321         { while read which lib version setname; do \
1322             test x"$$which" = xDEFAULT || continue; \
1323             test -z "$$setname" || echo "$$lib : $$setname"; \
1324           done < $(word 2,$^); \
1325           cat $(word 3,$^); \
1326         } | LC_ALL=C $(AWK) -f $< > $@T
1327         mv -f $@T $@
1328 $(common-objpfx)Versions.mk: $(..)scripts/haveversions.awk \
1329                              $(common-objpfx)Versions.all
1330         $(AWK) -f $^ > $@T
1331         mv -f $@T $@
1332 # See %.v/%.v.i implicit rules in Makeconfig.
1333 $(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
1334                               $(wildcard $(sysdirs:%=%/Versions)) \
1335                               $(sysd-versions-force)
1336 $(common-objpfx)sysd-versions: $(common-objpfx)versions.stmp
1337 $(common-objpfx)versions.stmp: $(common-objpfx)Versions.all \
1338                                $(common-objpfx)Versions.v \
1339                                $(..)scripts/versions.awk
1340         ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
1341           cat $(word 2,$^) \
1342           | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
1343                             -v move_if_change='$(move-if-change)' \
1344                             -f $(word 3,$^); \
1345         ) > $(common-objpfx)sysd-versionsT
1346         mv -f $(common-objpfx)sysd-versionsT $(common-objpfx)sysd-versions
1347         touch $@
1348 endif # avoid-generated
1349 endif # $(build-shared) = yes
1350
1351 -include $(common-objpfx)time64-compat.mk
1352 postclean-generated += time64-compat.mk
1353
1354 $(common-objpfx)time64-compat.mk: $(common-objpfx)time64-compat.mk.i \
1355                                   $(sysd-versions-force)
1356         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
1357         mv -f $@T $@
1358 $(common-objpfx)time64-compat.mk.i: $(..)Makeconfig
1359         printf "#include <time64-compat.h>\n#ifdef TIME64_NON_DEFAULT\nhave-time64-compat = yes\n#endif" \
1360         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - > $@T
1361         mv -f $@T $@
1362
1363
1364 endif # sysd-sorted-done
1365
1366 # The name under which the run-time dynamic linker is installed.
1367 # We are currently going for the convention that `/lib/ld.so.1'
1368 # names the SVR4/ELF ABI-compliant dynamic linker.
1369 ifndef rtld-installed-name
1370 ifdef ld.so-version
1371 rtld-installed-name = $(ld.so-version)
1372 else
1373 rtld-installed-name = ld.so.1
1374 endif
1375 endif
1376
1377 ifndef rtld-version-installed-name
1378 rtld-version-installed-name = ld-$(version).so
1379 endif
1380
1381 endif # build-shared
1382
1383
1384 ifeq ($(build-shared),yes)
1385 libm = $(common-objpfx)math/libm.so$(libm.so-version)
1386 libmvec = $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version)
1387 else
1388 libm = $(common-objpfx)math/libm.a
1389 libmvec = $(common-objpfx)mathvec/libmvec.a
1390 endif
1391
1392 ifeq ($(build-shared),yes)
1393 libsupport = $(common-objpfx)support/libsupport_nonshared.a
1394 else
1395 libsupport = $(common-objpfx)support/libsupport.a
1396 endif
1397
1398 # This is a partial list of subdirectories containing the library source.
1399 # The order is more or less arbitrary.  The sorting step will take care of the
1400 # dependencies and generate sorted-subdirs dynamically.
1401 all-subdirs = csu assert ctype locale intl catgets math setjmp signal       \
1402               stdlib stdio-common libio malloc string wcsmbs time dirent    \
1403               posix io termios resource misc socket sysvipc gmon            \
1404               gnulib iconv iconvdata wctype manual po argp                  \
1405               localedata timezone rt conform debug mathvec support          \
1406               dlfcn elf
1407
1408 ifndef avoid-generated
1409 # sysd-sorted itself will contain rules making the sysd-sorted target
1410 # depend on Depend files.  But if you just added a Depend file to an
1411 # existing directory not in all-subdirs, then sysd-sorted needs to
1412 # be regenerated, so it depends on existing $(sorted-subdirs:=/Depend) files.
1413 all-Depend-files := $(wildcard $(sort \
1414                         $(foreach dir,$(all-subdirs),\
1415                                   $(firstword $($(dir)-srcdir) \
1416                                   $(..)$(dir))/Depend) \
1417                         $(sorted-subdirs:=/Depend)))
1418 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
1419                              $(common-objpfx)config.make $(..)Makeconfig \
1420                              $(wildcard $(sysdirs:=/Subdirs)) \
1421                              $(all-Depend-files)
1422         $(AWK) -f $< \
1423                -v subdirs='$(all-subdirs)' \
1424                -v srcpfx='$(..)' \
1425                $(filter %/Subdirs %/Depend,$^) > $@-tmp
1426         mv -f $@-tmp $@
1427 $(all-Depend-files): ;
1428 endif
1429
1430 # This gives partial TARGET:SOURCE pattern pairs to have rules
1431 # emitted into sysd-rules.  A sysdeps Makeconfig fragment can
1432 # add its own special object file prefix to this list with e.g. foo-%:%
1433 # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
1434 sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
1435
1436 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
1437 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
1438 ifneq (,$(sysdep-makeconfigs))
1439 include $(sysdep-makeconfigs)
1440 endif
1441
1442 # Compute just the target patterns.  Makeconfig has set sysd-rules-patterns.
1443 sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
1444                                          $(firstword $(subst :, ,$p))))
1445
1446 # $(libpthread-routines-var) and $(librt-routines-var) are the make
1447 # variable to which pthread routines need to be added to land in the
1448 # right library.
1449 ifeq ($(pthread-in-libc),yes)
1450 libpthread-routines-var = routines
1451 librt-routines-var = routines
1452 libanl-routines-var = routines
1453 else
1454 libpthread-routines-var = libpthread-routines
1455 librt-routines-var = librt-routines
1456 libanl-routines-var = libanl-routines
1457 endif
1458
1459 # A sysdeps Makeconfig fragment may set libc-reentrant to yes.
1460 ifeq (yes,$(libc-reentrant))
1461 defines += -D_LIBC_REENTRANT
1462
1463 libio-mtsafe = -D_IO_MTSAFE_IO
1464 endif
1465
1466 # The name to give to a test in test results summaries.
1467 test-name = $(strip $(patsubst %.out, %, $(patsubst $(common-objpfx)%, %, $@)))
1468
1469 # Likewise, in XFAIL variable names.
1470 test-xfail-name = $(strip $(patsubst %.out, %, $(patsubst $(objpfx)%, %, $@)))
1471
1472 # Command to output a test status line (such as PASS: test-name).  If
1473 # test-xfail-$(test-xfail-name) has a nonempty value, the status will be
1474 # XPASS or XFAIL rather than PASS or FAIL.
1475 evaluate-test = $(..)scripts/evaluate-test.sh $(test-name) $$? \
1476                   $(if $(test-xfail-$(test-xfail-name)),true,false) \
1477                   $(if $(stop-on-test-failure),true,false) \
1478                   > $(common-objpfx)$(test-name).test-result
1479
1480 endif # Makeconfig not yet included
1481
1482 # Local Variables:
1483 # mode: makefile
1484 # End: