Makeconfig

   1 # Copyright (C) 1991-2024 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 # On systems that do not need a special startfile for statically linked
 364 # binaries, simply set it to the normal name.
 365 ifndef static-start-installed-name
 366 static-start-installed-name = $(start-installed-name)
 367 endif
 368
 369 ifeq (yes,$(enable-static-pie))
 370 # Link with rcrt1.o, instead of crt1.o, to call _dl_relocate_static_pie
 371 # to relocate static PIE.
 372 real-static-start-installed-name = r$(static-start-installed-name)
 373 else
 374 real-static-start-installed-name = $(static-start-installed-name)
 375 endif
 376
 377 relro-LDFLAGS = -Wl,-z,relro
 378 LDFLAGS.so += $(relro-LDFLAGS)
 379 LDFLAGS-rtld += $(relro-LDFLAGS)
 380
 381 # Linker options to enable and disable DT_RELR.
 382 ifeq ($(have-dt-relr),yes)
 383 dt-relr-ldflag = -Wl,-z,pack-relative-relocs
 384 no-dt-relr-ldflag = -Wl,-z,nopack-relative-relocs
 385 else
 386 dt-relr-ldflag =
 387 no-dt-relr-ldflag =
 388 endif
 389
 390 ifeq (no,$(build-pie-default))
 391 pie-default = $(no-pie-ccflag)
 392 else # build-pie-default
 393 pic-default = -DPIC
 394 # Compile libc.a and libc_p.a with -fPIE/-fpie for static PIE.
 395 pie-default = $(pie-ccflag)
 396
 397 ifeq (yes,$(enable-static-pie))
 398 static-pie-dt-relr-ldflag = $(dt-relr-ldflag)
 399 ifeq (yes,$(have-static-pie))
 400 static-pie-ldflag = -static-pie
 401 else
 402 # Static PIE can't have dynamic relocations in read-only segments since
 403 # static PIE is mapped into memory by kernel.  --eh-frame-hdr is needed
 404 # for PIE to support exception.
 405 static-pie-ldflag = -Wl,-pie,--no-dynamic-linker,--eh-frame-hdr,-z,text
 406 endif # have-static-pie
 407 endif # enable-static-pie
 408 endif # build-pie-default
 409
 410 # If lazy relocations are disabled, add the -z now flag.  Use
 411 # LDFLAGS-lib.so instead of LDFLAGS.so, to avoid adding the flag to
 412 # test modules.
 413 ifeq ($(bind-now),yes)
 414 LDFLAGS-lib.so += -Wl,-z,now
 415 # Extra flags for dynamically linked non-test main programs.
 416 link-extra-flags += -Wl,-z,now
 417 endif
 418
 419 # Command to run after every final link (executable or shared object).
 420 # This is invoked with $(call after-link,...), so it should operate on
 421 # the file $1.  This can be set to do some sort of post-processing on
 422 # binaries, or to perform some sort of static sanity check.
 423 ifndef after-link
 424 after-link =
 425 endif
 426
 427 # Additional libraries to link into every test.
 428 link-extra-libs-tests = $(libsupport)
 429
 430 # Command for linking PIE programs with the C library.
 431 ifndef +link-pie
 432 +link-pie-before-inputs = $(if $($(@F)-no-pie),$(no-pie-ldflag),-pie) \
 433              $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(dt-relr-ldflag)) \
 434              -Wl,-O1 -nostdlib -nostartfiles \
 435              $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 436              $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 437              $(firstword $(CRT-$(@F)) $(csu-objpfx)S$(start-installed-name)) \
 438              $(+preinit) $(+prectorS)
 439 +link-pie-before-libc = -o $@ $(+link-pie-before-inputs) \
 440              $(filter-out $(addprefix $(csu-objpfx),start.o \
 441                                                     S$(start-installed-name))\
 442                           $(+preinit) $(link-extra-libs) \
 443                           $(common-objpfx)libc% $(+postinit),$^) \
 444              $(link-extra-libs)
 445 +link-pie-after-libc = $(+postctorS) $(+postinit)
 446 define +link-pie
 447 $(CC) $(link-libc-rpath-link) $(+link-pie-before-libc) $(rtld-LDFLAGS) \
 448   $(link-extra-flags) $(link-libc) $(+link-pie-after-libc)
 449 $(call after-link,$@)
 450 endef
 451 define +link-pie-tests
 452 $(CC) $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
 453   $(+link-pie-after-libc)
 454 $(call after-link,$@)
 455 endef
 456 define +link-pie-printers-tests
 457 $(CC) $(+link-pie-before-libc) $(built-rtld-LDFLAGS) \
 458   $(link-libc-printers-tests) $(+link-pie-after-libc)
 459 $(call after-link,$@)
 460 endef
 461 endif
 462 # Command for statically linking programs with the C library.
 463 ifndef +link-static
 464 +link-static-before-inputs = -nostdlib -nostartfiles -static \
 465               $(if $($(@F)-no-pie),$(no-pie-ldflag),$(static-pie-ldflag)) \
 466               $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(static-pie-dt-relr-ldflag)) \
 467               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F))  \
 468               $(firstword $(CRT-$(@F)) $(csu-objpfx)$(real-static-start-installed-name)) \
 469               $(+preinit) $(+prectorT)
 470 +link-static-before-libc = -o $@ $(+link-static-before-inputs) \
 471               $(filter-out $(addprefix $(csu-objpfx),start.o \
 472                                                      $(start-installed-name))\
 473                            $(+preinit) $(link-extra-libs-static) \
 474                            $(common-objpfx)libc% $(+postinit),$^) \
 475               $(link-extra-libs-static)
 476 +link-static-after-libc = $(+postctorT) $(+postinit)
 477 define +link-static
 478 $(CC) $(+link-static-before-libc) $(link-extra-flags) $(link-libc-static) \
 479   $(+link-static-after-libc)
 480 $(call after-link,$@)
 481 endef
 482 define +link-static-tests
 483 $(CC) $(+link-static-before-libc) $(link-libc-static-tests) \
 484   $(+link-static-after-libc)
 485 $(call after-link,$@)
 486 endef
 487 endif
 488 # Commands for linking programs with the C library.
 489 ifndef +link
 490 ifeq (yes,$(build-shared))
 491 ifeq (yes,$(cc-pie-default))
 492 no-pie-ldflag = -no-pie
 493 endif
 494 ifeq (yes,$(build-pie-default))
 495 +link = $(+link-pie)
 496 +link-tests = $(+link-pie-tests)
 497 +link-tests-before-inputs = $(+link-pie-before-inputs) $(rtld-tests-LDFLAGS)
 498 +link-tests-after-inputs = $(link-libc-tests) $(+link-pie-after-libc)
 499 +link-printers-tests = $(+link-pie-printers-tests)
 500 else  # not build-pie-default
 501 +link-before-inputs = -nostdlib -nostartfiles $(no-pie-ldflag) \
 502               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 503               $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 504               $(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-installed-name)) \
 505               $(+preinit) $(+prector)
 506 +link-before-libc = -o $@ $(+link-before-inputs) \
 507               $(filter-out $(addprefix $(csu-objpfx),start.o \
 508                                                      $(start-installed-name))\
 509                            $(+preinit) $(link-extra-libs) \
 510                            $(common-objpfx)libc% $(+postinit),$^) \
 511               $(link-extra-libs)
 512 +link-after-libc = $(+postctor) $(+postinit)
 513 define +link
 514 $(CC) $(link-libc-rpath-link) $(+link-before-libc) $(rtld-LDFLAGS) \
 515   $(link-extra-flags) $(link-libc) $(+link-after-libc)
 516 $(call after-link,$@)
 517 endef
 518 +link-tests-before-inputs = $(+link-before-inputs) $(rtld-tests-LDFLAGS)
 519 +link-tests-after-inputs = $(link-libc-tests) $(+link-after-libc)
 520 define +link-tests
 521 $(CC) $(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
 522                      $(+link-after-libc)
 523 $(call after-link,$@)
 524 endef
 525 define +link-printers-tests
 526 $(CC) $(+link-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \
 527                      $(+link-after-libc)
 528 $(call after-link,$@)
 529 endef
 530 endif  # build-pie-default
 531 else  # build-static
 532 +link = $(+link-static)
 533 +link-tests = $(+link-static-tests)
 534 +link-tests-before-inputs = $(+link-static-before-inputs)
 535 +link-tests-after-inputs = $(link-libc-static-tests) $(+link-static-after-libc)
 536 +link-printers-tests = $(+link-static-tests)
 537 endif  # build-shared
 538 endif  # +link
 539
 540 # The pretty printer test programs need to be compiled without optimizations
 541 # so they won't confuse gdb.  We could use either the 'GCC optimize' pragma
 542 # or the 'optimize' function attribute to achieve this; however, at least on
 543 # ARM, gcc always produces different debugging symbols when invoked with
 544 # a -O greater than 0 than when invoked with -O0, regardless of anything else
 545 # we're using to suppress optimizations.  Therefore, we need to explicitly pass
 546 # -O0 to it through CFLAGS. As a result, any fortification needs to be disabled
 547 # as it needs -O greater than 0.
 548 # Additionally, the build system will try to -include $(common-objpfx)/config.h
 549 # when compiling the tests, which will throw an error if some special macros
 550 # (such as __OPTIMIZE__ and IS_IN_build) aren't defined.  To avoid this, we
 551 # tell gcc to define IS_IN_build.
 552 CFLAGS-printers-tests := -O0 -ggdb3 -DIS_IN_build $(no-fortify-source)
 553
 554 ifeq (yes,$(build-shared))
 555 # These indicate whether to link using the built ld.so or the installed one.
 556 installed-rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name)
 557 built-rtld-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so
 558
 559 ifndef rtld-LDFLAGS
 560 rtld-LDFLAGS = $(installed-rtld-LDFLAGS)
 561 endif
 562
 563 ifndef rtld-tests-LDFLAGS
 564 ifeq (yes,$(build-hardcoded-path-in-tests))
 565 rtld-tests-LDFLAGS = $(built-rtld-LDFLAGS)
 566 else
 567 rtld-tests-LDFLAGS = $(installed-rtld-LDFLAGS)
 568 endif  # build-hardcoded-path-in-tests
 569 endif  # rtld-tests-LDFLAGS
 570
 571 endif  # build-shared
 572
 573 ifndef link-libc
 574 ifeq (yes,$(build-shared))
 575 # We need the versioned name of libc.so in the deps of $(others) et al
 576 # so that the symlink to libc.so is created before anything tries to
 577 # run the linked programs.
 578 link-libc-rpath = -Wl,-rpath=$(rpath-link)
 579 link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
 580
 581 # For programs which are not tests, $(link-libc-rpath-link) is added
 582 # directly in $(+link), $(+link-pie) above, so that -Wl,-rpath-link
 583 # comes before the expansion of LDLIBS-* and affects libraries added
 584 # there.  For shared objects, -Wl,-rpath-link is added via
 585 # $(build-shlib-helper) and $(build-module-helper) in Makerules (also
 586 # before the expansion of LDLIBS-* variables).
 587
 588 # Tests use -Wl,-rpath instead of -Wl,-rpath-link for
 589 # build-hardcoded-path-in-tests.
 590 ifeq (yes,$(build-hardcoded-path-in-tests))
 591 link-libc-tests-rpath-link = $(link-libc-rpath)
 592 link-test-modules-rpath-link = $(link-libc-rpath)
 593 else
 594 link-libc-tests-rpath-link = $(link-libc-rpath-link)
 595 link-test-modules-rpath-link =
 596 endif  # build-hardcoded-path-in-tests
 597
 598 link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
 599                            $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
 600                            -Wl,--as-needed $(elf-objpfx)ld.so \
 601                            -Wl,--no-as-needed
 602 link-libc = $(link-libc-between-gnulib) $(gnulib)
 603
 604 link-libc-tests-after-rpath-link = $(gnulib-tests) $(link-libc-between-gnulib) $(gnulib-tests)
 605 link-libc-tests = $(link-libc-tests-rpath-link) \
 606                   $(link-libc-tests-after-rpath-link)
 607 # Pretty printer test programs always require rpath instead of rpath-link.
 608 link-libc-printers-tests = $(link-libc-rpath) \
 609                            $(link-libc-tests-after-rpath-link)
 610
 611 # This is how to find at build-time things that will be installed there.
 612 rpath-dirs = math elf dlfcn nss nis rt resolv mathvec support
 613 rpath-link = \
 614 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
 615 else  # build-static
 616 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
 617 link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
 618 endif  # build-shared
 619 endif  # link-libc
 620
 621 # Differences in the linkers on the various platforms.
 622 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
 623 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
 624 LDFLAGS-rdynamic = -rdynamic
 625 LDFLAGS-Bsymbolic = -Bsymbolic
 626
 627 # Choose the default search path for the dynamic linker based on
 628 # where we will install libraries.
 629 ifneq ($(libdir),$(slibdir))
 630 default-rpath = $(slibdir):$(libdir)
 631 else
 632 default-rpath = $(libdir)
 633 endif
 634
 635 ifndef link-extra-libs
 636 link-extra-libs = $(LDLIBS-$(@F))
 637 link-extra-libs-static = $(link-extra-libs)
 638 endif
 639
 640 # The static libraries.
 641 link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
 642 link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
 643
 644 # How to link against libgcc.  Some libgcc functions, such as those
 645 # for "long long" arithmetic or software floating point, can always be
 646 # built without use of C library headers and do not have any global
 647 # state so can safely be linked statically into any executable or
 648 # shared library requiring them; these functions are in libgcc.a.
 649 # Other functions, relating to exception handling, may require C
 650 # library headers to build and it may not be safe to have more than
 651 # one copy of them in a process; these functions are only in
 652 # libgcc_s.so and libgcc_eh.a.
 653 #
 654 # To avoid circular dependencies when bootstrapping, it is desirable
 655 # to avoid use of libgcc_s and libgcc_eh in building glibc.  Where any
 656 # glibc functionality (in particular, thread cancellation) requires
 657 # exception handling, this is implemented through dlopen of libgcc_s
 658 # to avoid unnecessary dependencies on libgcc_s by programs not using
 659 # that functionality; executables built with glibc do not use
 660 # exception handling other than through thread cancellation.
 661 #
 662 # Undefined references to functions from libgcc_eh or libgcc_s may
 663 # arise for code built with -fexceptions.  In the case of statically
 664 # linked programs installed by glibc, unwinding will never actually
 665 # occur at runtime and the use of elf/static-stubs.c to resolve these
 666 # references is safe.  In the case of statically linked test programs
 667 # and test programs built with -fexceptions, unwinding may occur in
 668 # some cases and it is preferable to link with libgcc_eh or libgcc_s
 669 # so that the testing is as similar as possible to how programs will
 670 # be built with the installed glibc.
 671 #
 672 # Some architectures have architecture-specific systems for exception
 673 # handling that may involve undefined references to
 674 # architecture-specific functions.  On those architectures,
 675 # gnulib-arch and static-gnulib-arch may be defined in sysdeps
 676 # makefiles to use additional libraries for linking executables and
 677 # shared libraries built by glibc.
 678 ifndef gnulib
 679 ifneq ($(have-cc-with-libunwind),yes)
 680   libunwind =
 681 else
 682   libunwind = -lunwind
 683 endif
 684 libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
 685 gnulib-arch =
 686 gnulib = -lgcc $(gnulib-arch)
 687 gnulib-tests := -lgcc $(libgcc_eh)
 688 static-gnulib-arch =
 689 # By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
 690 # statically link programs.  When --disable-shared is used, we use
 691 # -lgcc_eh since elf/static-stubs.o isn't sufficient.
 692 ifeq (yes,$(build-shared))
 693 static-gnulib = -lgcc $(static-gnulib-arch)
 694 else
 695 static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
 696 endif
 697 static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
 698 libc.so-gnulib := -lgcc
 699 endif
 700 +preinit = $(addprefix $(csu-objpfx),crti.o)
 701 +postinit = $(addprefix $(csu-objpfx),crtn.o)
 702 +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
 703 +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 704 # Variants of the two previous definitions for linking PIE programs.
 705 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
 706 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
 707 # Variants of the two previous definitions for statically linking programs.
 708 static-prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
 709 static-postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 710 ifeq (yes,$(enable-static-pie))
 711 # Static PIE must use PIE variants.
 712 +prectorT = $(if $($(@F)-no-pie),$(static-prector),$(+prectorS))
 713 +postctorT = $(if $($(@F)-no-pie),$(static-postctor),$(+postctorS))
 714 else
 715 +prectorT = $(static-prector)
 716 +postctorT =$(static-postctor)
 717 endif
 718 csu-objpfx = $(common-objpfx)csu/
 719 elf-objpfx = $(common-objpfx)elf/
 720
 721 # A command that, prepended to the name and arguments of a program,
 722 # and run on the build system, causes that program with those
 723 # arguments to be run on the host for which the library is built.
 724 ifndef test-wrapper
 725 test-wrapper =
 726 endif
 727 # Likewise, but the name of the program is preceded by
 728 # <variable>=<value> assignments for environment variables.
 729 ifndef test-wrapper-env
 730 test-wrapper-env = $(test-wrapper) env
 731 endif
 732 # Likewise, but the program's environment will be empty except for any
 733 # explicit <variable>=<value> assignments preceding the program name.
 734 ifndef test-wrapper-env-only
 735 test-wrapper-env-only = $(test-wrapper) env -i
 736 endif
 737
 738 # Whether to run test programs built for the library's host system.
 739 ifndef run-built-tests
 740 ifeq (yes|,$(cross-compiling)|$(test-wrapper))
 741 run-built-tests = no
 742 else
 743 run-built-tests = yes
 744 endif
 745 endif
 746
 747 # Whether to stop immediately when a test fails.  Nonempty means to
 748 # stop, empty means not to stop.
 749 ifndef stop-on-test-failure
 750 stop-on-test-failure =
 751 endif
 752
 753 # How to run a program we just linked with our library.
 754 # The program binary is assumed to be $(word 2,$^).
 755 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
 756 rtld-prefix = $(elf-objpfx)$(rtld-installed-name)                             \
 757               --library-path                                                  \
 758               $(rpath-link)$(patsubst %,:%,$(sysdep-library-path))
 759 ifeq (yes,$(build-shared))
 760 comma = ,
 761 sysdep-library-path = \
 762 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
 763                                        $(filter -Wl$(comma)-rpath-link=%,\
 764                                                 $(sysdep-LDFLAGS)))))
 765 # $(run-via-rtld-prefix) is a command that, when prepended to the name
 766 # of a program built with the newly built library, produces a command
 767 # that, executed on the host for which the library is built, runs that
 768 # program.  For tests listed in tests-static or xtests-static, it is
 769 # empty.
 770 run-via-rtld-prefix =                                                         \
 771   $(if $(strip $(filter $(notdir $(built-program-file)),                      \
 772                         $(tests-static) $(xtests-static))),, $(rtld-prefix))
 773 else
 774 run-via-rtld-prefix =
 775 endif
 776 # $(run-program-env) is the default environment variable settings to
 777 # use when running a program built with the newly built library.
 778 run-program-env = GCONV_PATH=$(common-objpfx)iconvdata \
 779                   LOCPATH=$(common-objpfx)localedata LC_ALL=C
 780 # $(run-program-prefix) is a command that, when prepended to the name
 781 # of a program built with the newly built library, produces a command
 782 # that, executed on the build system on which "make" is run, runs that
 783 # program.  $(run-program-prefix-before-env) and
 784 # $(run-program-prefix-after-env) are similar, but separate parts
 785 # before and after a list of environment variables.
 786 run-program-prefix-before-env = $(test-wrapper-env)
 787 run-program-prefix-after-env = $(run-via-rtld-prefix)
 788 run-program-prefix = $(run-program-prefix-before-env) $(run-program-env) \
 789                      $(run-program-prefix-after-env)
 790 # $(built-program-cmd) is a command that, executed on the build system
 791 # on which "make" is run, runs the newly built program that is the
 792 # second dependency of the makefile target in which
 793 # $(built-program-cmd) is used.  $(built-program-cmd-before-env) and
 794 # $(built-program-cmd-after-env) are similar, before and after a list
 795 # of environment variables.
 796 built-program-cmd-before-env = $(test-wrapper-env)
 797 built-program-cmd-after-env = $(run-via-rtld-prefix) $(built-program-file)
 798 built-program-cmd = $(built-program-cmd-before-env) $(run-program-env) \
 799                     $(built-program-cmd-after-env)
 800 # $(host-built-program-cmd) is a command that, executed on the host
 801 # for which the library is built, runs the newly built program that is
 802 # the second dependency of the makefile target in which
 803 # $(host-built-program-cmd) is used.
 804 host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
 805 # $(ld-library-path) is the common content to be set in LD_LIBRARY_PATH
 806 # for running static binaries that may load dynamic objects.
 807 ld-library-path = $(objpfx):$(common-objpfx)$(addprefix :,$(sysdep-ld-library-path))
 808
 809 ifndef LD
 810 LD := ld -X
 811 endif
 812
 813 # $(test-via-rtld-prefix) is a command that, when prepended to the name
 814 # of a test program built with the newly built library, produces a command
 815 # that, executed on the host for which the library is built, runs that
 816 # program.  For tests listed in tests-static or xtests-static as well
 817 # as when test programs are hardcoded to the newly built libraries, it
 818 # is empty.
 819
 820 # $(test-program-prefix) is a command that, when prepended to the name
 821 # of a test program built with the newly built library, produces a command
 822 # that, executed on the build system on which "make" is run, runs that
 823 # test program.  $(test-program-prefix-before-env) and
 824 # $(test-program-prefix-after-env) are similar, before and after a
 825 # list of environment variables.
 826
 827 # $(test-program-cmd) is a command that, executed on the build system
 828 # on which "make" is run, runs the newly built test program that is the
 829 # second dependency of the makefile target in which
 830 # $(test-program-cmd) is used.  $(test-program-cmd-before-env) and
 831 # $(test-program-cmd-after-env) are similar, before and after a list
 832 # of environment variables.
 833
 834 # $(host-test-program-cmd) is a command that, executed on the host
 835 # for which the library is built, runs the newly built test program that
 836 # is the second dependency of the makefile target in which
 837 # $(host-test-program-cmd) is used.
 838
 839 ifeq (yes,$(build-hardcoded-path-in-tests))
 840 test-via-rtld-prefix =
 841 test-program-prefix-before-env = $(test-wrapper-env)
 842 test-program-prefix-after-env =
 843 test-program-prefix = $(test-program-prefix-before-env) $(run-program-env) \
 844                       $(test-program-prefix-after-env)
 845 test-program-cmd-before-env = $(test-wrapper-env)
 846 test-program-cmd-after-env = $(built-program-file)
 847 test-program-cmd = $(test-program-cmd-before-env) $(run-program-env) \
 848                    $(test-program-cmd-after-env)
 849 host-test-program-cmd = $(built-program-file)
 850 else
 851 test-via-rtld-prefix = $(run-via-rtld-prefix)
 852 test-program-prefix-before-env = $(run-program-prefix-before-env)
 853 test-program-prefix-after-env = $(run-program-prefix-after-env)
 854 test-program-prefix = $(run-program-prefix)
 855 test-program-cmd-before-env = $(built-program-cmd-before-env)
 856 test-program-cmd-after-env = $(built-program-cmd-after-env)
 857 test-program-cmd = $(built-program-cmd)
 858 host-test-program-cmd = $(host-built-program-cmd)
 859 endif
 860
 861 # Extra flags to pass to GCC.
 862 +gccwarn := -Wall -Wwrite-strings -Wundef
 863 ifeq ($(enable-werror),yes)
 864 +gccwarn += -Werror
 865 endif
 866 +gccwarn-c = -Wstrict-prototypes -Wold-style-definition
 867
 868 # We do not depend on the address of constants in different files to be
 869 # actually different, so allow the compiler to merge them all.
 870 +merge-constants = -fmerge-all-constants
 871
 872 # We have to assume that glibc functions are called in any rounding
 873 # mode and also change the rounding mode in a few functions. So,
 874 # disable any optimization that assume default rounding mode.
 875 +math-flags = -frounding-math
 876
 877 # Logically only "libnldbl", "nonlib" and "testsuite" should be using
 878 # -fno-math-errno. However due to GCC bug #88576, only "libm" can use
 879 # -fno-math-errno.
 880 +extra-math-flags = $(if $(filter libm,$(in-module)),-fno-math-errno,-fmath-errno)
 881
 882 # Use 64 bit time_t support for installed programs
 883 installed-modules = nonlib nscd ldconfig locale_programs \
 884                     iconvprogs libnss_files libnss_compat libnss_db libnss_hesiod \
 885                     libutil libpcprofile libnsl
 886 +extra-time-flags = $(if $(filter $(installed-modules),\
 887                            $(in-module)),-D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64)
 888
 889 # We might want to compile with some stack-protection flag.
 890 ifneq ($(stack-protector),)
 891 +stack-protector=$(stack-protector)
 892 endif
 893
 894 # Some routines are unsafe to build with stack-protection since they're called
 895 # before the stack check guard is set up.  Provide a way to disable stack
 896 # protector.  The first argument is the extension (.o, .os, .oS) and the second
 897 # is a list of routines that this path should be applied to.
 898 define elide-stack-protector
 899 $(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-stack-protector))
 900 endef
 901
 902 # We might want to compile with fortify-source
 903 ifneq ($(fortify-source),)
 904 +fortify-source=$(fortify-source)
 905 endif
 906
 907 # Some routine can't be fortified like the ones used by fortify
 908 define elide-fortify-source
 909 $(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-fortify-source))
 910 endef
 911
 912 # The program that makes Emacs-style TAGS files.
 913 ETAGS   := etags
 914
 915 # The `xgettext' program for producing .pot files from sources.
 916 ifndef XGETTEXT
 917 XGETTEXT = xgettext
 918 endif
 919
 920 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
 921 # perhaps others) to preprocess assembly code in some cases.
 922 M4 = m4
 923
 924 # To force installation of files even if they are older than the
 925 # installed files.  This variable is included in the dependency list
 926 # of all installation targets.
 927 ifeq ($(force-install),yes)
 928 +force = force-install
 929 else
 930 +force =
 931 endif
 932
 933 ####
 934 #### End of configuration variables.
 935 ####
 936 \f
 937 # This tells some versions of GNU make before 3.63 not to export all variables.
 938 .NOEXPORT:
 939
 940 # We want to echo the commands we're running without
 941 # umpteen zillion filenames along with it (we use `...' instead)
 942 # but we don't want this echoing done when the user has said
 943 # he doesn't want to see commands echoed by using -s.
 944 ifeq ($(silent-make),yes)                       # if -s
 945 +cmdecho        := echo >/dev/null
 946 else                                            # not -s
 947 +cmdecho        := echo
 948 endif                                           # -s
 949
 950 # These are the flags given to the compiler to tell
 951 # it what sort of optimization and/or debugging output to do.
 952 ifndef  +cflags
 953 # If `CFLAGS' was defined, use that.
 954 ifdef           CFLAGS
 955 +cflags := $(filter-out -I%,$(CFLAGS))
 956 endif           # CFLAGS
 957 endif   # +cflags
 958
 959 # If none of the above worked, default to "-g -O".
 960 ifeq    "$(strip $(+cflags))" ""
 961 +cflags := $(default_cflags)
 962 endif   # $(+cflags) == ""
 963
 964 # Force building with -fno-common because hidden_def, compat_symbol
 965 # and other constructs do not work for common symbols (and would
 966 # otherwise require specifying __attribute__ ((nocommon)) on a
 967 # case-by-case basis).
 968 +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) \
 969            $(+stack-protector) -fno-common
 970 +gcc-nowarn := -w
 971
 972 # We must filter out elf because the early bootstrap of the dynamic loader
 973 # cannot be fortified. Likewise we exclude dlfcn because it is entangled
 974 # with the loader. We must filter out csu because early startup, like the
 975 # loader, cannot be fortified. Lastly debug is the fortification routines
 976 # themselves and they cannot be fortified.
 977 do-fortify = $(filter-out elf dlfcn csu debug,$(subdir))
 978 ifeq ($(do-fortify),$(subdir))
 979 +cflags += $(+fortify-source)
 980 else
 981 +cflags += $(no-fortify-source)
 982 endif
 983
 984 # Each sysdeps directory can contain header files that both will be
 985 # used to compile and will be installed.  Each can also contain an
 986 # include/ subdirectory, whose header files will be used to compile
 987 # but will not be installed, and will take precedence over the
 988 # installed files.  This mirrors the top-level include/ subdirectory.
 989 +sysdep-includes := $(foreach dir,$(+sysdep_dirs),\
 990                               $(addprefix -I,$(wildcard $(dir)/include) $(dir)))
 991
 992 # These are flags given to the C compiler to tell it to look for
 993 # include files (including ones given in angle brackets) in the parent
 994 # library source directory, in the include directory, and in the
 995 # current directory.
 996 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
 997             $(+sysdep-includes) $(includes) \
 998             $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
 999
1000 # Since libio has several internal header files, we use a -I instead
1001 # of many little headers in the include directory.
1002 libio-include = -I$(..)libio
1003
1004 # List of non-library modules that we build.
1005 built-modules = iconvprogs iconvdata ldconfig libmemusage \
1006                 libpcprofile librpcsvc locale-programs \
1007                 memusagestat nonlib nscd extramodules libnldbl libsupport \
1008                 testsuite testsuite-internal
1009
1010 in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
1011                                     $(libof-$(<F)) \
1012                                     $(libof-$(@F)) \
1013                                     libc))
1014
1015 # Build ld.so, libc.so and libpthread.so with -ftls-model=initial-exec
1016 tls-model = $(if $(filter libpthread rtld \
1017                           libc,$(in-module)),-ftls-model=initial-exec,)
1018
1019 module-cppflags-real = -include $(common-objpfx)libc-modules.h \
1020                        -DMODULE_NAME=$(in-module)
1021
1022 # We don't need libc-modules.h and the MODULE_NAME definition for .v.i
1023 # files.  These targets don't (and will likely never need to) use the IS_IN
1024 # facility.  In fact, shlib-versions should not use it because that will
1025 # create a circular dependency as libc-modules.h is generated from
1026 # shlib-versions.
1027 module-cppflags = $(if $(filter %.mk.i %.v.i,$(@F)),,$(module-cppflags-real))
1028
1029 # These are the variables that the implicit compilation rules use.
1030 # Note that we can't use -std=* in CPPFLAGS, because it overrides
1031 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
1032 # it causes cpp to stop predefining __ASSEMBLER__.
1033 CPPFLAGS = $(config-extra-cppflags) $(CPPFLAGS-config) \
1034            $($(subdir)-CPPFLAGS) \
1035            $(+includes) $(defines) $(module-cppflags) \
1036            -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
1037            $(CPPFLAGS-$(suffix $@)) \
1038            $(foreach lib,$(libof-$(basename $(@F))) \
1039                          $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
1040            $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F))) \
1041            -DTOP_NAMESPACE=glibc
1042
1043 override CFLAGS = -std=gnu11 -fgnu89-inline $(config-extra-cflags) \
1044                   $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
1045                   $(+extra-math-flags) $(+extra-time-flags) \
1046                   $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
1047                   $(CFLAGS-$(@F)) $(tls-model) \
1048                   $(foreach lib,$(libof-$(basename $(@F))) \
1049                                 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
1050 # Use our copies of cstdlib and cmath.
1051 override CXXFLAGS = -I$(common-objpfx) $(c++-sysincludes) \
1052                     $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
1053                     $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
1054
1055 # If everything is compiled with -fPIC (implicitly) we must tell this by
1056 # defining the PIC symbol.
1057 ifeq (yes,$(build-pic-default))
1058 pic-default = -DPIC
1059 endif
1060
1061 # Enable object files for different versions of the library.
1062 # Various things use $(object-suffixes) to know what all to make.
1063 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
1064 # to pass different flags for each flavor.
1065 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
1066 # .op may be added to all-object-suffixes below.
1067 all-object-suffixes := .o .os .oS
1068 object-suffixes :=
1069 CPPFLAGS-.o = $(pic-default)
1070 # libc.a must be compiled with -fPIE/-fpie for static PIE.
1071 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) $(pie-default)
1072 CFLAGS-.o += $(call elide-fortify-source,.o,$(routines_no_fortify))
1073 CFLAGS-.o += $(call elide-fortify-source,_chk.o,$(routines_no_fortify))
1074 libtype.o := lib%.a
1075 object-suffixes += .o
1076 ifeq (yes,$(build-shared))
1077 # Under --enable-shared, we will build a shared library of PIC objects.
1078 # The PIC object files are named foo.os.
1079 object-suffixes += .os
1080 pic-cppflags = -DPIC -DSHARED
1081 CPPFLAGS-.os = $(pic-cppflags)
1082 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
1083 CFLAGS-.os += $(call elide-fortify-source,.os,$(routines_no_fortify))
1084 CFLAGS-.os += $(call elide-fortify-source,_chk.os,$(routines_no_fortify))
1085 libtype.os := lib%_pic.a
1086 # This can be changed by a sysdep makefile
1087 pic-ccflag = -fPIC
1088 # This one should always stay like this unless there is a very good reason.
1089 PIC-ccflag = -fPIC
1090 endif
1091 # This can be changed by a sysdep makefile
1092 pie-ccflag = -fPIE
1093 no-pie-ccflag = -fno-pie
1094 # This one should always stay like this unless there is a very good reason.
1095 PIE-ccflag = -fPIE
1096 ifeq (yes,$(build-profile))
1097 # Under --enable-profile, we will build a static library of profiled objects.
1098 # The profiled object files are named foo.op.
1099 all-object-suffixes += .op
1100 object-suffixes += .op
1101 CPPFLAGS-.op = -DPROF $(pic-default)
1102 # libc_p.a must be compiled with -fPIE/-fpie for static PIE.
1103 CFLAGS-.op = -pg $(pie-default)
1104 CFLAGS-.op += $(call elide-fortify-source,.op,$(routines_no_fortify))
1105 CFLAGS-.op += $(call elide-fortify-source,_chk.op,$(routines_no_fortify))
1106 libtype.op = lib%_p.a
1107 endif
1108
1109 # Convenience variable for when we want to treat shared-library cases
1110 # differently from the rest.
1111 object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
1112
1113 object-suffixes-for-libc := $(object-suffixes)
1114
1115 ifeq (yes,$(build-shared))
1116 # Build special library that contains the static-only routines for libc.
1117 object-suffixes-for-libc += .oS
1118
1119 # Must build the routines as PIC, though, because they can end up in (users')
1120 # shared objects.  We don't want to use CFLAGS-os because users may, for
1121 # example, make that processor-specific.
1122 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag) $(extra-nonshared-cflags)
1123 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
1124 libtype.oS = lib%_nonshared.a
1125 endif
1126
1127 # The assembler can generate debug information too.
1128 ifndef ASFLAGS
1129 ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
1130 endif
1131 override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
1132
1133 ifndef BUILD_CC
1134 BUILD_CC = $(CC)
1135 endif
1136
1137 move-if-change = $(SHELL) $(..)scripts/move-if-change
1138 \f
1139 -include $(common-objpfx)sysd-sorted
1140 subdirs = $(sorted-subdirs)
1141 subdir-srcdirs = $(foreach dir,$(subdirs),\
1142                            $(firstword $($(dir)-srcdir) $(..)$(dir)))
1143
1144 # This is a pair of implicit rules to preprocess a file with # comments,
1145 # %ifdef et al, based on config.h settings or other %include'd files.
1146 # We use chained rules instead of a pipeline here so that we can properly
1147 # check the exit status of cpp rather than using its bad output when there
1148 # is a preprocessing error.  Another rule should depend on the output file
1149 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
1150 # listing both its input files, and any header files that it may reference
1151 # (but no commands).
1152 %.v.i: $(common-objpfx)config.h $(..)Makeconfig
1153         sed '/^[        ]*%/!s/#.*$$//;/^[      ]*$$/d;s/^[     ]*%/#/' \
1154             $(filter-out FORCE %.h $(..)Makeconfig,$^) \
1155         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
1156                    > $@T
1157         mv -f $@T $@
1158 %.v: %.v.i
1159         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
1160         mv -f $@T $@
1161
1162 ifeq (yes, $(build-shared))
1163
1164 # To generate a header to support more than one ABI for different
1165 # architecture variants, the CPU/Makefile defines abi-variants to be a
1166 # list of names for those variants (e.g. 32 64), and, for each variant,
1167 # defines abi-$(variant)-condition to be the condition for those options
1168 # to use in a C #if condition.  abi-includes may be defined to a list of
1169 # headers to include in the generated header, if the default does not
1170 # suffice.  default-abi is defined to be the ABI for the current glibc
1171 # build.
1172
1173 ifndef abi-includes
1174 abi-includes := bits/wordsize.h
1175 endif
1176
1177 # Process the shlib-versions file, which tells us what shared library
1178 # version numbers to use when we install shared objects on this system.
1179 # We need to wait until $(subdirs) is complete.
1180 ifeq ($(sysd-sorted-done),t)
1181 -include $(common-objpfx)soversions.mk
1182 ifndef avoid-generated
1183 $(common-objpfx)shlib-versions.v.i: \
1184         $(wildcard $(+sysdep_dirs:=/shlib-versions) \
1185                    $(subdir-srcdirs:=/shlib-versions)) \
1186         $(..)shlib-versions
1187
1188 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
1189                               $(common-objpfx)shlib-versions.v
1190         $(AWK) -f $^ > $@T
1191         mv -f $@T $@
1192 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
1193         (while read which lib number setname; do \
1194            eval seen_$$which=1; \
1195            test x"$$which" = xDEFAULT || continue; \
1196            case $$number in \
1197              [0-9]*) echo "$$lib.so-version=.$$number"; \
1198                      echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
1199              *)      echo "$$lib.so-version=$$number"; \
1200                      echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
1201            esac; \
1202          done; \
1203          echo soversions.mk-done = t;) < $< > $@T; exit 0
1204         mv -f $@T $@
1205 endif
1206 endif
1207
1208 postclean-generated += soversions.mk soversions.i \
1209                        shlib-versions.v shlib-versions.v.i
1210
1211 before-compile += $(common-objpfx)libc-modules.h
1212 common-generated += libc-modules.h libc-modules.stmp
1213 ifeq ($(soversions.mk-done),t)
1214 # Generate a header with macro definitions for use with the IS_IN macro.
1215 # These are the possible values for the MODULE_NAME macro defined when building
1216 # sources, to identify which module the translation unit is going to be built
1217 # into.
1218 $(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @:
1219 $(common-objpfx)libc-modules.stmp: $(..)scripts/gen-libc-modules.awk \
1220                                    $(common-objpfx)soversions.i
1221         $(AWK) -v buildlist="$(subst -,_,$(built-modules))" -f $^ > ${@:stmp=T}
1222         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1223         touch $@
1224
1225 endif
1226
1227 # Build the tunables list header early since it could be used by any module in
1228 # glibc.
1229 before-compile += $(common-objpfx)dl-tunable-list.h
1230 common-generated += dl-tunable-list.h dl-tunable-list.stmp
1231
1232 $(common-objpfx)dl-tunable-list.h: $(common-objpfx)dl-tunable-list.stmp; @:
1233 $(common-objpfx)dl-tunable-list.stmp: \
1234                 $(..)scripts/gen-tunables.awk \
1235                 $(..)elf/dl-tunables.list \
1236                 $(wildcard $(subdirs:%=$(..)%/dl-tunables.list)) \
1237                 $(wildcard $(sysdirs:%=%/dl-tunables.list))
1238         $(AWK) -f $^ > ${@:stmp=T}
1239         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1240         touch $@
1241
1242 # Dump the GCC macros used by the default compiler flags to a header
1243 # file, so that they can be inspected when using different compiler
1244 # flags.  Add the GCCMACRO prefix to make these macro names unique.
1245 $(common-objpfx)gcc-macros.h.in: $(common-objpfx)config.status
1246         $(CC) $(CFLAGS) $(CPPFLAGS) -E -dM -x c -o $@ /dev/null
1247 $(common-objpfx)gcc-macros.h: $(common-objpfx)gcc-macros.h.in
1248         sed 's/^#define /#define GCCMACRO/' < $< > $@
1249 before-compile += $(common-objpfx)gcc-macros.h
1250
1251 # Generate version maps, but wait until sysdep-subdirs is known
1252 ifeq ($(sysd-sorted-done),t)
1253 ifeq ($(build-shared),yes)
1254 -include $(common-objpfx)sysd-versions
1255 -include $(common-objpfx)Versions.mk
1256 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
1257 common-generated += $(version-maps)
1258 postclean-generated += sysd-versions Versions.all abi-versions.h \
1259                        Versions.def Versions.v.i Versions.v Versions.mk
1260
1261 ifndef avoid-generated
1262 ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
1263 sysd-versions-force = FORCE
1264 FORCE:
1265 endif
1266
1267 $(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
1268                               $(common-objpfx)Versions.v
1269         LC_ALL=C $(AWK) -f $^ > $@T
1270         mv -f $@T $@
1271
1272 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
1273                               $(common-objpfx)soversions.i \
1274                               $(common-objpfx)Versions.def
1275         { while read which lib version setname; do \
1276             test x"$$which" = xDEFAULT || continue; \
1277             test -z "$$setname" || echo "$$lib : $$setname"; \
1278           done < $(word 2,$^); \
1279           cat $(word 3,$^); \
1280         } | LC_ALL=C $(AWK) -f $< > $@T
1281         mv -f $@T $@
1282 $(common-objpfx)Versions.mk: $(..)scripts/haveversions.awk \
1283                              $(common-objpfx)Versions.all
1284         $(AWK) -f $^ > $@T
1285         mv -f $@T $@
1286 # See %.v/%.v.i implicit rules in Makeconfig.
1287 $(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
1288                               $(wildcard $(sysdirs:%=%/Versions)) \
1289                               $(sysd-versions-force)
1290 $(common-objpfx)sysd-versions: $(common-objpfx)versions.stmp
1291 $(common-objpfx)versions.stmp: $(common-objpfx)Versions.all \
1292                                $(common-objpfx)Versions.v \
1293                                $(..)scripts/versions.awk
1294         ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
1295           cat $(word 2,$^) \
1296           | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
1297                             -v move_if_change='$(move-if-change)' \
1298                             -f $(word 3,$^); \
1299         ) > $(common-objpfx)sysd-versionsT
1300         mv -f $(common-objpfx)sysd-versionsT $(common-objpfx)sysd-versions
1301         touch $@
1302 endif # avoid-generated
1303 endif # $(build-shared) = yes
1304
1305 -include $(common-objpfx)time64-compat.mk
1306 postclean-generated += time64-compat.mk
1307
1308 $(common-objpfx)time64-compat.mk: $(common-objpfx)time64-compat.mk.i \
1309                                   $(sysd-versions-force)
1310         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
1311         mv -f $@T $@
1312 $(common-objpfx)time64-compat.mk.i: $(..)Makeconfig
1313         printf "#include <time64-compat.h>\n#ifdef TIME64_NON_DEFAULT\nhave-time64-compat = yes\n#endif" \
1314         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - > $@T
1315         mv -f $@T $@
1316
1317
1318 endif # sysd-sorted-done
1319
1320 # The name under which the run-time dynamic linker is installed.
1321 # We are currently going for the convention that `/lib/ld.so.1'
1322 # names the SVR4/ELF ABI-compliant dynamic linker.
1323 ifndef rtld-installed-name
1324 ifdef ld.so-version
1325 rtld-installed-name = $(ld.so-version)
1326 else
1327 rtld-installed-name = ld.so.1
1328 endif
1329 endif
1330
1331 ifndef rtld-version-installed-name
1332 rtld-version-installed-name = ld-$(version).so
1333 endif
1334
1335 endif # build-shared
1336
1337
1338 ifeq ($(build-shared),yes)
1339 libm = $(common-objpfx)math/libm.so$(libm.so-version)
1340 libmvec = $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version)
1341 else
1342 libm = $(common-objpfx)math/libm.a
1343 libmvec = $(common-objpfx)mathvec/libmvec.a
1344 endif
1345
1346 ifeq ($(build-shared),yes)
1347 libsupport = $(common-objpfx)support/libsupport_nonshared.a
1348 else
1349 libsupport = $(common-objpfx)support/libsupport.a
1350 endif
1351
1352 # This is a partial list of subdirectories containing the library source.
1353 # The order is more or less arbitrary.  The sorting step will take care of the
1354 # dependencies and generate sorted-subdirs dynamically.
1355 all-subdirs = csu assert ctype locale intl catgets math setjmp signal       \
1356               stdlib stdio-common libio malloc string wcsmbs time dirent    \
1357               posix io termios resource misc socket sysvipc gmon            \
1358               gnulib iconv iconvdata wctype manual po argp                  \
1359               localedata timezone rt conform debug mathvec support          \
1360               dlfcn elf
1361
1362 ifndef avoid-generated
1363 # sysd-sorted itself will contain rules making the sysd-sorted target
1364 # depend on Depend files.  But if you just added a Depend file to an
1365 # existing directory not in all-subdirs, then sysd-sorted needs to
1366 # be regenerated, so it depends on existing $(sorted-subdirs:=/Depend) files.
1367 all-Depend-files := $(wildcard $(sort \
1368                         $(foreach dir,$(all-subdirs),\
1369                                   $(firstword $($(dir)-srcdir) \
1370                                   $(..)$(dir))/Depend) \
1371                         $(sorted-subdirs:=/Depend)))
1372 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
1373                              $(common-objpfx)config.make $(..)Makeconfig \
1374                              $(wildcard $(sysdirs:=/Subdirs)) \
1375                              $(all-Depend-files)
1376         $(AWK) -f $< \
1377                -v subdirs='$(all-subdirs)' \
1378                -v srcpfx='$(..)' \
1379                $(filter %/Subdirs %/Depend,$^) > $@-tmp
1380         mv -f $@-tmp $@
1381 $(all-Depend-files): ;
1382 endif
1383
1384 # This gives partial TARGET:SOURCE pattern pairs to have rules
1385 # emitted into sysd-rules.  A sysdeps Makeconfig fragment can
1386 # add its own special object file prefix to this list with e.g. foo-%:%
1387 # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
1388 sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
1389
1390 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
1391 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
1392 ifneq (,$(sysdep-makeconfigs))
1393 include $(sysdep-makeconfigs)
1394 endif
1395
1396 # Compute just the target patterns.  Makeconfig has set sysd-rules-patterns.
1397 sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
1398                                          $(firstword $(subst :, ,$p))))
1399
1400 # $(libpthread-routines-var) and $(librt-routines-var) are the make
1401 # variable to which pthread routines need to be added to land in the
1402 # right library.
1403 ifeq ($(pthread-in-libc),yes)
1404 libpthread-routines-var = routines
1405 librt-routines-var = routines
1406 libanl-routines-var = routines
1407 else
1408 libpthread-routines-var = libpthread-routines
1409 librt-routines-var = librt-routines
1410 libanl-routines-var = libanl-routines
1411 endif
1412
1413 # A sysdeps Makeconfig fragment may set libc-reentrant to yes.
1414 ifeq (yes,$(libc-reentrant))
1415 defines += -D_LIBC_REENTRANT
1416
1417 libio-mtsafe = -D_IO_MTSAFE_IO
1418 endif
1419
1420 # The name to give to a test in test results summaries.
1421 test-name = $(strip $(patsubst %.out, %, $(patsubst $(common-objpfx)%, %, $@)))
1422
1423 # Likewise, in XFAIL variable names.
1424 test-xfail-name = $(strip $(patsubst %.out, %, $(patsubst $(objpfx)%, %, $@)))
1425
1426 # Command to output a test status line (such as PASS: test-name).  If
1427 # test-xfail-$(test-xfail-name) has a nonempty value, the status will be
1428 # XPASS or XFAIL rather than PASS or FAIL.
1429 evaluate-test = $(..)scripts/evaluate-test.sh $(test-name) $$? \
1430                   $(if $(test-xfail-$(test-xfail-name)),true,false) \
1431                   $(if $(stop-on-test-failure),true,false) \
1432                   > $(common-objpfx)$(test-name).test-result
1433
1434 endif # Makeconfig not yet included
1435
1436 # Local Variables:
1437 # mode: makefile
1438 # End: