Makeconfig

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