Makeconfig

   1 # Copyright (C) 1991-2021 Free Software Foundation, Inc.
   2 # This file is part of the GNU C Library.
   3
   4 # The GNU C Library is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU Lesser General Public
   6 # License as published by the Free Software Foundation; either
   7 # version 2.1 of the License, or (at your option) any later version.
   8
   9 # The GNU C Library is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # Lesser General Public License for more details.
  13
  14 # You should have received a copy of the GNU Lesser General Public
  15 # License along with the GNU C Library; if not, see
  16 # <https://www.gnu.org/licenses/>.
  17
  18 #
  19 #       Makefile configuration options for the GNU C library.
  20 #
  21 ifneq (,)
  22 This makefile requires GNU Make.
  23 endif
  24
  25 all: # Make this the default goal
  26
  27 ifneq "$(origin +included-Makeconfig)" "file"
  28
  29 +included-Makeconfig := yes
  30
  31 ifdef subdir
  32 .. := ../
  33 endif
  34
  35 # $(common-objdir) is the place to put objects and
  36 # such that are not specific to a single subdir.
  37 ifdef objdir
  38 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
  39 common-objpfx = $(objdir)/
  40 common-objdir = $(objdir)
  41 else
  42 $(error objdir must be defined by the build-directory Makefile)
  43 endif
  44
  45 # Root of the sysdeps tree.
  46 sysdep_dir := $(..)sysdeps
  47 export sysdep_dir := $(sysdep_dir)
  48
  49 # Get the values defined by options to `configure'.
  50 include $(common-objpfx)config.make
  51
  52 # What flags to give to sources which call user provided callbacks
  53 uses-callbacks = -fexceptions
  54
  55 # What flags to give to tests which test stack alignment
  56 stack-align-test-flags =
  57
  58 # Complete path to sysdep dirs.
  59 # `configure' writes a definition of `config-sysdirs' in `config.make'.
  60 sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
  61
  62 +sysdep_dirs = $(sysdirs)
  63 ifdef objdir
  64 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
  65 endif
  66
  67 # Run config.status to update config.make and config.h.  We don't show the
  68 # dependence of config.h to Make, because it is only touched when it
  69 # changes and so config.status would be run every time; the dependence of
  70 # config.make should suffice to force regeneration and re-exec, and the new
  71 # image will notice if config.h changed.
  72 $(common-objpfx)config.make: $(common-objpfx)config.status \
  73                              $(..)config.make.in $(..)config.h.in
  74         cd $(<D); $(SHELL) $(<F)
  75
  76 # Find all the sysdeps configure fragments, to make sure we re-run
  77 # configure when any of them changes.
  78 $(common-objpfx)config.status: $(..)version.h $(..)configure \
  79                                $(foreach dir,$(sysdirs),\
  80                                          $(wildcard $(dir)/Implies) \
  81                                          $(patsubst %.ac,%,\
  82                                                     $(firstword $(wildcard \
  83  $(addprefix $(dir)/,configure configure.ac))))) \
  84                                $(patsubst %.ac,%,\
  85  $(wildcard $(..)sysdeps/*/preconfigure $(..)sysdeps/*/preconfigure.ac))
  86         @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
  87          echo The GNU C library has not been configured. >&2; \
  88          echo Run \`configure\' to configure it before building. >&2; \
  89          echo Try \`configure --help\' for more details. >&2; \
  90          exit 1; fi
  91
  92 # We don't want CPPFLAGS to be exported to the command running configure.
  93 unexport CPPFLAGS
  94
  95 # Get the user's configuration parameters.
  96 ifneq ($(wildcard $(..)configparms),)
  97 include $(..)configparms
  98 endif
  99 ifneq ($(objpfx),)
 100 ifneq ($(wildcard $(common-objpfx)configparms),)
 101 include $(common-objpfx)configparms
 102 endif
 103 endif
 104 \f
 105 ####
 106 ####    These are the configuration variables.  You can define values for
 107 ####    the variables below in the file `configparms'.
 108 ####    Do NOT edit this file.
 109 ####
 110
 111
 112 # Common prefix for machine-independent installation directories.
 113 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
 114 prefix = /usr/local
 115 endif
 116
 117 # Decide whether we shall build the programs or not.  We always do this
 118 # unless the user tells us (in configparms) or we are building for a
 119 # standalone target.
 120 ifndef build-programs
 121 ifneq ($(config-os),none)
 122 build-programs=yes
 123 else
 124 build-programs=no
 125 endif
 126 endif
 127
 128 # Common prefix for machine-dependent installation directories.
 129 ifeq ($(origin exec_prefix),undefined)
 130 exec_prefix = $(prefix)
 131 endif
 132
 133 # Where to install the library and object files.
 134 ifndef libdir
 135 libdir = $(exec_prefix)/lib
 136 endif
 137 inst_libdir = $(install_root)$(libdir)
 138
 139 # Where to install the shared library.
 140 ifndef slibdir
 141 slibdir = $(exec_prefix)/lib
 142 endif
 143 inst_slibdir = $(install_root)$(slibdir)
 144
 145 # Where to install the dynamic linker.
 146 ifndef rtlddir
 147 rtlddir = $(slibdir)
 148 endif
 149 inst_rtlddir = $(install_root)$(rtlddir)
 150
 151 # Prefix to put on files installed in $(libdir).  For libraries `libNAME.a',
 152 # the prefix is spliced between `lib' and the name, so the linker switch
 153 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
 154 # just prepended to the whole file name.
 155 ifeq ($(origin libprefix),undefined)
 156 libprefix =
 157 endif
 158
 159 # Where to install the header files.
 160 ifndef includedir
 161 includedir = $(prefix)/include
 162 endif
 163 inst_includedir = $(install_root)$(includedir)
 164
 165 # Where to install machine-independent data files.
 166 # These are the timezone database, and the locale database.
 167 ifndef datadir
 168 datadir = $(prefix)/share
 169 endif
 170 inst_datadir = $(install_root)$(datadir)
 171
 172 # Where to install the timezone data files (which are machine-independent).
 173 ifndef zonedir
 174 zonedir = $(datadir)/zoneinfo
 175 endif
 176 inst_zonedir = $(install_root)$(zonedir)
 177
 178 # Where to install the compiled binary locale archive and compiled
 179 # binary locale files.
 180 ifndef complocaledir
 181 complocaledir = $(libdir)/locale
 182 endif
 183 inst_complocaledir = $(install_root)$(complocaledir)
 184
 185 # Where to install the message catalog data files (which are
 186 # machine-independent).
 187 ifndef localedir
 188 localedir = $(datadir)/locale
 189 endif
 190 inst_localedir = $(install_root)$(localedir)
 191
 192 # Where to install the locale charmap source files.
 193 ifndef i18ndir
 194 i18ndir = $(datadir)/i18n
 195 endif
 196 inst_i18ndir = $(install_root)$(i18ndir)
 197
 198 # Where to install the shared object for charset transformation.
 199 ifndef gconvdir
 200 gconvdir = $(libdir)/gconv
 201 endif
 202 inst_gconvdir = $(install_root)$(gconvdir)
 203
 204 # Where to install programs.
 205 ifndef bindir
 206 bindir = $(exec_prefix)/bin
 207 endif
 208 inst_bindir = $(install_root)$(bindir)
 209
 210 # Where to install internal programs.
 211 ifndef libexecdir
 212 libexecdir = $(exec_prefix)/libexec
 213 endif
 214 inst_libexecdir = $(install_root)$(libexecdir)
 215
 216 # Where to install administrative programs.
 217 ifndef rootsbindir
 218 rootsbindir = $(exec_prefix)/sbin
 219 endif
 220 inst_rootsbindir = $(install_root)$(rootsbindir)
 221
 222 ifndef sbindir
 223 sbindir = $(exec_prefix)/sbin
 224 endif
 225 inst_sbindir = $(install_root)$(sbindir)
 226
 227 # Where to install the Info files.
 228 ifndef infodir
 229 infodir = $(prefix)/info
 230 endif
 231 inst_infodir = $(install_root)$(infodir)
 232
 233 # Where to install audit libraries.
 234 ifndef auditdir
 235 auditdir = $(libdir)/audit
 236 endif
 237 inst_auditdir = $(install_root)$(auditdir)
 238
 239 # Where to install default configuration files.  These include the local
 240 # timezone specification and network data base files.
 241 ifndef sysconfdir
 242 sysconfdir = $(prefix)/etc
 243 endif
 244 inst_sysconfdir = $(install_root)$(sysconfdir)
 245
 246 # Directory for the database files and Makefile for nss_db.
 247 ifndef vardbdir
 248 vardbdir = $(localstatedir)/db
 249 endif
 250 inst_vardbdir = $(install_root)$(vardbdir)
 251
 252 # Where to install the "localtime" timezone file; this is the file whose
 253 # contents $(localtime) specifies.  If this is a relative pathname, it is
 254 # relative to $(zonedir).  It is a good idea to put this somewhere
 255 # other than there, so the zoneinfo directory contains only universal data,
 256 # localizing the configuration data elsewhere.
 257 ifndef localtime-file
 258 localtime-file = $(sysconfdir)/localtime
 259 endif
 260
 261 # What to use for leap second specifications in compiling the default
 262 # timezone files.  Set this to `/dev/null' for no leap second handling as
 263 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
 264 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
 265 # This variable determines the default: if it's `/dev/null',
 266 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
 267 ifndef leapseconds
 268 leapseconds = /dev/null
 269 endif
 270
 271 # What timezone's DST rules should be used when a POSIX-style TZ
 272 # environment variable doesn't specify any rules.  For 1003.1 compliance
 273 # this timezone must use rules that are as U.S. federal law defines DST.
 274 # Run `make -C time echo-zonenames' to see a list of available zone names.
 275 # This setting can be changed with `zic -p TIMEZONE' at any time.
 276 # If you want POSIX.1 compatibility, use `America/New_York'.
 277 ifndef posixrules
 278 posixrules = America/New_York
 279 endif
 280
 281 # Where to install the "posixrules" timezone file; this is file
 282 # whose contents $(posixrules) specifies.  If this is a relative
 283 # pathname, it is relative to $(zonedir).
 284 ifndef posixrules-file
 285 posixrules-file = posixrules
 286 endif
 287
 288
 289 # Directory where your system's native header files live.
 290 # This is used on Unix systems to generate some GNU libc header files.
 291 ifndef sysincludedir
 292 sysincludedir = /usr/include
 293 endif
 294
 295
 296 # Commands to install files.
 297 ifndef INSTALL_DATA
 298 INSTALL_DATA = $(INSTALL) -m 644
 299 endif
 300 ifndef INSTALL_SCRIPT
 301 INSTALL_SCRIPT = $(INSTALL)
 302 endif
 303 ifndef INSTALL_PROGRAM
 304 INSTALL_PROGRAM = $(INSTALL)
 305 endif
 306 ifndef INSTALL
 307 INSTALL = install
 308 endif
 309
 310
 311 # The name of the C compiler.
 312 # If you've got GCC, and it works, use it.
 313 ifeq ($(origin CC),default)
 314 CC := gcc
 315 endif
 316
 317 # The name of the C compiler to use for compilations of programs to run on
 318 # the host that is building the library.  If you set CC to a
 319 # cross-compiler, you must set this to the normal compiler.
 320 ifndef BUILD_CC
 321 BUILD_CC = $(CC)
 322 endif
 323
 324 # Default flags to pass the C compiler.
 325 ifndef default_cflags
 326 ifeq ($(release),stable)
 327 default_cflags := -g -O2
 328 else
 329 default_cflags := -g -O
 330 endif
 331 endif
 332
 333 # Flags to pass the C compiler when assembling preprocessed assembly code
 334 # (`.S' files).
 335 ifndef asm-CPPFLAGS
 336 asm-CPPFLAGS =
 337 endif
 338
 339 # Must be supported by the linker.
 340 no-whole-archive = -Wl,--no-whole-archive
 341 whole-archive = -Wl,--whole-archive
 342
 343 # Installed name of the startup code.
 344 # The ELF convention is that the startfile is called crt1.o
 345 start-installed-name = crt1.o
 346 # On systems that do not need a special startfile for statically linked
 347 # binaries, simply set it to the normal name.
 348 ifndef static-start-installed-name
 349 static-start-installed-name = $(start-installed-name)
 350 endif
 351
 352 ifeq (yes,$(enable-static-pie))
 353 # Link with rcrt1.o, instead of crt1.o, to call _dl_relocate_static_pie
 354 # to relocate static PIE.
 355 real-static-start-installed-name = r$(static-start-installed-name)
 356 else
 357 real-static-start-installed-name = $(static-start-installed-name)
 358 endif
 359
 360 ifeq (yesyes,$(build-shared)$(have-z-combreloc))
 361 combreloc-LDFLAGS = -Wl,-z,combreloc
 362 LDFLAGS.so += $(combreloc-LDFLAGS)
 363 LDFLAGS-rtld += $(combreloc-LDFLAGS)
 364 endif
 365
 366 relro-LDFLAGS = -Wl,-z,relro
 367 LDFLAGS.so += $(relro-LDFLAGS)
 368 LDFLAGS-rtld += $(relro-LDFLAGS)
 369
 370 ifeq (yes,$(have-hash-style))
 371 # For the time being we unconditionally use 'both'.  At some time we
 372 # should declare statically linked code as 'out of luck' and compile
 373 # with --hash-style=gnu only.
 374 hashstyle-LDFLAGS = -Wl,--hash-style=both
 375 LDFLAGS.so += $(hashstyle-LDFLAGS)
 376 LDFLAGS-rtld += $(hashstyle-LDFLAGS)
 377 endif
 378
 379 ifeq (yes,$(enable-static-pie))
 380 pic-default = -DPIC
 381 # Compile libc.a and libc_p.a with -fPIE/-fpie for static PIE.
 382 pie-default = $(pie-ccflag)
 383 ifeq (yes,$(have-static-pie))
 384 default-pie-ldflag = -static-pie
 385 else
 386 # Static PIE can't have dynamic relocations in read-only segments since
 387 # static PIE is mapped into memory by kernel.  --eh-frame-hdr is needed
 388 # for PIE to support exception.
 389 default-pie-ldflag = -Wl,-pie,--no-dynamic-linker,--eh-frame-hdr,-z,text
 390 endif
 391 endif
 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              $(combreloc-LDFLAGS) $(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),$(no-pie-ldflag),$(default-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 \
 483               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 484               $(combreloc-LDFLAGS) $(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 else
 573 link-libc-tests-rpath-link = $(link-libc-rpath-link)
 574 endif  # build-hardcoded-path-in-tests
 575
 576 link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
 577                            $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
 578                            -Wl,--as-needed $(elf-objpfx)ld.so \
 579                            -Wl,--no-as-needed
 580 link-libc = $(link-libc-between-gnulib) $(gnulib)
 581
 582 link-libc-tests-after-rpath-link = $(gnulib-tests) $(link-libc-between-gnulib) $(gnulib-tests)
 583 link-libc-tests = $(link-libc-tests-rpath-link) \
 584                   $(link-libc-tests-after-rpath-link)
 585 # Pretty printer test programs always require rpath instead of rpath-link.
 586 link-libc-printers-tests = $(link-libc-rpath) \
 587                            $(link-libc-tests-after-rpath-link)
 588
 589 # This is how to find at build-time things that will be installed there.
 590 rpath-dirs = math elf dlfcn nss nis rt resolv mathvec support
 591 rpath-link = \
 592 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
 593 else  # build-static
 594 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
 595 link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
 596 endif  # build-shared
 597 endif  # link-libc
 598
 599 # Differences in the linkers on the various platforms.
 600 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
 601 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
 602 LDFLAGS-rdynamic = -rdynamic
 603 LDFLAGS-Bsymbolic = -Bsymbolic
 604
 605 # Choose the default search path for the dynamic linker based on
 606 # where we will install libraries.
 607 ifneq ($(libdir),$(slibdir))
 608 default-rpath = $(slibdir):$(libdir)
 609 else
 610 default-rpath = $(libdir)
 611 endif
 612
 613 ifndef link-extra-libs
 614 link-extra-libs = $(LDLIBS-$(@F))
 615 link-extra-libs-static = $(link-extra-libs)
 616 endif
 617
 618 # The static libraries.
 619 link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
 620 link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
 621
 622 # How to link against libgcc.  Some libgcc functions, such as those
 623 # for "long long" arithmetic or software floating point, can always be
 624 # built without use of C library headers and do not have any global
 625 # state so can safely be linked statically into any executable or
 626 # shared library requiring them; these functions are in libgcc.a.
 627 # Other functions, relating to exception handling, may require C
 628 # library headers to build and it may not be safe to have more than
 629 # one copy of them in a process; these functions are only in
 630 # libgcc_s.so and libgcc_eh.a.
 631 #
 632 # To avoid circular dependencies when bootstrapping, it is desirable
 633 # to avoid use of libgcc_s and libgcc_eh in building glibc.  Where any
 634 # glibc functionality (in particular, thread cancellation) requires
 635 # exception handling, this is implemented through dlopen of libgcc_s
 636 # to avoid unnecessary dependencies on libgcc_s by programs not using
 637 # that functionality; executables built with glibc do not use
 638 # exception handling other than through thread cancellation.
 639 #
 640 # Undefined references to functions from libgcc_eh or libgcc_s may
 641 # arise for code built with -fexceptions.  In the case of statically
 642 # linked programs installed by glibc, unwinding will never actually
 643 # occur at runtime and the use of elf/static-stubs.c to resolve these
 644 # references is safe.  In the case of statically linked test programs
 645 # and test programs built with -fexceptions, unwinding may occur in
 646 # some cases and it is preferable to link with libgcc_eh or libgcc_s
 647 # so that the testing is as similar as possible to how programs will
 648 # be built with the installed glibc.
 649 #
 650 # Some architectures have architecture-specific systems for exception
 651 # handling that may involve undefined references to
 652 # architecture-specific functions.  On those architectures,
 653 # gnulib-arch and static-gnulib-arch may be defined in sysdeps
 654 # makefiles to use additional libraries for linking executables and
 655 # shared libraries built by glibc.
 656 ifndef gnulib
 657 ifneq ($(have-cc-with-libunwind),yes)
 658   libunwind =
 659 else
 660   libunwind = -lunwind
 661 endif
 662 libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
 663 gnulib-arch =
 664 gnulib = -lgcc $(gnulib-arch)
 665 gnulib-tests := -lgcc $(libgcc_eh)
 666 static-gnulib-arch =
 667 # By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
 668 # statically link programs.  When --disable-shared is used, we use
 669 # -lgcc_eh since elf/static-stubs.o isn't sufficient.
 670 ifeq (yes,$(build-shared))
 671 static-gnulib = -lgcc $(static-gnulib-arch)
 672 else
 673 static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
 674 endif
 675 static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
 676 libc.so-gnulib := -lgcc
 677 endif
 678 +preinit = $(addprefix $(csu-objpfx),crti.o)
 679 +postinit = $(addprefix $(csu-objpfx),crtn.o)
 680 +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
 681 +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 682 # Variants of the two previous definitions for linking PIE programs.
 683 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
 684 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
 685 # Variants of the two previous definitions for statically linking programs.
 686 ifeq (yes,$(enable-static-pie))
 687 # Static PIE must use PIE variants.
 688 +prectorT = $(+prectorS)
 689 +postctorT = $(+postctorS)
 690 else
 691 +prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
 692 +postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 693 endif
 694 csu-objpfx = $(common-objpfx)csu/
 695 elf-objpfx = $(common-objpfx)elf/
 696
 697 # A command that, prepended to the name and arguments of a program,
 698 # and run on the build system, causes that program with those
 699 # arguments to be run on the host for which the library is built.
 700 ifndef test-wrapper
 701 test-wrapper =
 702 endif
 703 # Likewise, but the name of the program is preceded by
 704 # <variable>=<value> assignments for environment variables.
 705 ifndef test-wrapper-env
 706 test-wrapper-env = $(test-wrapper) env
 707 endif
 708 # Likewise, but the program's environment will be empty except for any
 709 # explicit <variable>=<value> assignments preceding the program name.
 710 ifndef test-wrapper-env-only
 711 test-wrapper-env-only = $(test-wrapper) env -i
 712 endif
 713
 714 # Whether to run test programs built for the library's host system.
 715 ifndef run-built-tests
 716 ifeq (yes|,$(cross-compiling)|$(test-wrapper))
 717 run-built-tests = no
 718 else
 719 run-built-tests = yes
 720 endif
 721 endif
 722
 723 # Whether to stop immediately when a test fails.  Nonempty means to
 724 # stop, empty means not to stop.
 725 ifndef stop-on-test-failure
 726 stop-on-test-failure =
 727 endif
 728
 729 # How to run a program we just linked with our library.
 730 # The program binary is assumed to be $(word 2,$^).
 731 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
 732 rtld-prefix = $(elf-objpfx)$(rtld-installed-name)                             \
 733               --library-path                                                  \
 734               $(rpath-link)$(patsubst %,:%,$(sysdep-library-path))
 735 ifeq (yes,$(build-shared))
 736 comma = ,
 737 sysdep-library-path = \
 738 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
 739                                        $(filter -Wl$(comma)-rpath-link=%,\
 740                                                 $(sysdep-LDFLAGS)))))
 741 # $(run-via-rtld-prefix) is a command that, when prepended to the name
 742 # of a program built with the newly built library, produces a command
 743 # that, executed on the host for which the library is built, runs that
 744 # program.  For tests listed in tests-static or xtests-static, it is
 745 # empty.
 746 run-via-rtld-prefix =                                                         \
 747   $(if $(strip $(filter $(notdir $(built-program-file)),                      \
 748                         $(tests-static) $(xtests-static))),, $(rtld-prefix))
 749 else
 750 run-via-rtld-prefix =
 751 endif
 752 # $(run-program-env) is the default environment variable settings to
 753 # use when running a program built with the newly built library.
 754 run-program-env = GCONV_PATH=$(common-objpfx)iconvdata \
 755                   LOCPATH=$(common-objpfx)localedata LC_ALL=C
 756 # $(run-program-prefix) is a command that, when prepended to the name
 757 # of a program built with the newly built library, produces a command
 758 # that, executed on the build system on which "make" is run, runs that
 759 # program.  $(run-program-prefix-before-env) and
 760 # $(run-program-prefix-after-env) are similar, but separate parts
 761 # before and after a list of environment variables.
 762 run-program-prefix-before-env = $(test-wrapper-env)
 763 run-program-prefix-after-env = $(run-via-rtld-prefix)
 764 run-program-prefix = $(run-program-prefix-before-env) $(run-program-env) \
 765                      $(run-program-prefix-after-env)
 766 # $(built-program-cmd) is a command that, executed on the build system
 767 # on which "make" is run, runs the newly built program that is the
 768 # second dependency of the makefile target in which
 769 # $(built-program-cmd) is used.  $(built-program-cmd-before-env) and
 770 # $(built-program-cmd-after-env) are similar, before and after a list
 771 # of environment variables.
 772 built-program-cmd-before-env = $(test-wrapper-env)
 773 built-program-cmd-after-env = $(run-via-rtld-prefix) $(built-program-file)
 774 built-program-cmd = $(built-program-cmd-before-env) $(run-program-env) \
 775                     $(built-program-cmd-after-env)
 776 # $(host-built-program-cmd) is a command that, executed on the host
 777 # for which the library is built, runs the newly built program that is
 778 # the second dependency of the makefile target in which
 779 # $(host-built-program-cmd) is used.
 780 host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
 781 # $(ld-library-path) is the common content to be set in LD_LIBRARY_PATH
 782 # for running static binaries that may load dynamic objects.
 783 ld-library-path = $(objpfx):$(common-objpfx)$(addprefix :,$(sysdep-ld-library-path))
 784
 785 ifndef LD
 786 LD := ld -X
 787 endif
 788
 789 # $(test-via-rtld-prefix) is a command that, when prepended to the name
 790 # of a test program built with the newly built library, produces a command
 791 # that, executed on the host for which the library is built, runs that
 792 # program.  For tests listed in tests-static or xtests-static as well
 793 # as when test programs are hardcoded to the newly built libraries, it
 794 # is empty.
 795
 796 # $(test-program-prefix) is a command that, when prepended to the name
 797 # of a test program built with the newly built library, produces a command
 798 # that, executed on the build system on which "make" is run, runs that
 799 # test program.  $(test-program-prefix-before-env) and
 800 # $(test-program-prefix-after-env) are similar, before and after a
 801 # list of environment variables.
 802
 803 # $(test-program-cmd) is a command that, executed on the build system
 804 # on which "make" is run, runs the newly built test program that is the
 805 # second dependency of the makefile target in which
 806 # $(test-program-cmd) is used.  $(test-program-cmd-before-env) and
 807 # $(test-program-cmd-after-env) are similar, before and after a list
 808 # of environment variables.
 809
 810 # $(host-test-program-cmd) is a command that, executed on the host
 811 # for which the library is built, runs the newly built test program that
 812 # is the second dependency of the makefile target in which
 813 # $(host-test-program-cmd) is used.
 814
 815 ifeq (yes,$(build-hardcoded-path-in-tests))
 816 test-via-rtld-prefix =
 817 test-program-prefix-before-env = $(test-wrapper-env)
 818 test-program-prefix-after-env =
 819 test-program-prefix = $(test-program-prefix-before-env) $(run-program-env) \
 820                       $(test-program-prefix-after-env)
 821 test-program-cmd-before-env = $(test-wrapper-env)
 822 test-program-cmd-after-env = $(built-program-file)
 823 test-program-cmd = $(test-program-cmd-before-env) $(run-program-env) \
 824                    $(test-program-cmd-after-env)
 825 host-test-program-cmd = $(built-program-file)
 826 else
 827 test-via-rtld-prefix = $(run-via-rtld-prefix)
 828 test-program-prefix-before-env = $(run-program-prefix-before-env)
 829 test-program-prefix-after-env = $(run-program-prefix-after-env)
 830 test-program-prefix = $(run-program-prefix)
 831 test-program-cmd-before-env = $(built-program-cmd-before-env)
 832 test-program-cmd-after-env = $(built-program-cmd-after-env)
 833 test-program-cmd = $(built-program-cmd)
 834 host-test-program-cmd = $(host-built-program-cmd)
 835 endif
 836
 837 # Extra flags to pass to GCC.
 838 ifeq ($(all-warnings),yes)
 839 +gccwarn := -Wall -Wwrite-strings -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
 840 else
 841 +gccwarn := -Wall -Wwrite-strings
 842 endif
 843 +gccwarn += -Wundef
 844 ifeq ($(enable-werror),yes)
 845 +gccwarn += -Werror
 846 endif
 847 +gccwarn-c = -Wstrict-prototypes -Wold-style-definition
 848
 849 # We do not depend on the address of constants in different files to be
 850 # actually different, so allow the compiler to merge them all.
 851 +merge-constants = -fmerge-all-constants
 852
 853 # We have to assume that glibc functions are called in any rounding
 854 # mode and also change the rounding mode in a few functions. So,
 855 # disable any optimization that assume default rounding mode.
 856 +math-flags = -frounding-math
 857
 858 # Logically only "libnldbl", "nonlib" and "testsuite" should be using
 859 # -fno-math-errno. However due to GCC bug #88576, only "libm" can use
 860 # -fno-math-errno.
 861 +extra-math-flags = $(if $(filter libm,$(in-module)),-fno-math-errno,-fmath-errno)
 862
 863 # We might want to compile with some stack-protection flag.
 864 ifneq ($(stack-protector),)
 865 +stack-protector=$(stack-protector)
 866 endif
 867
 868 # Some routines are unsafe to build with stack-protection since they're called
 869 # before the stack check guard is set up.  Provide a way to disable stack
 870 # protector.  The first argument is the extension (.o, .os, .oS) and the second
 871 # is a list of routines that this path should be applied to.
 872 define elide-stack-protector
 873 $(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-stack-protector))
 874 endef
 875
 876 # The program that makes Emacs-style TAGS files.
 877 ETAGS   := etags
 878
 879 # The `xgettext' program for producing .pot files from sources.
 880 ifndef XGETTEXT
 881 XGETTEXT = xgettext
 882 endif
 883
 884 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
 885 # perhaps others) to preprocess assembly code in some cases.
 886 M4 = m4
 887
 888 # To force installation of files even if they are older than the
 889 # installed files.  This variable is included in the dependency list
 890 # of all installation targets.
 891 ifeq ($(force-install),yes)
 892 +force = force-install
 893 else
 894 +force =
 895 endif
 896
 897 ####
 898 #### End of configuration variables.
 899 ####
 900 \f
 901 # This tells some versions of GNU make before 3.63 not to export all variables.
 902 .NOEXPORT:
 903
 904 # We want to echo the commands we're running without
 905 # umpteen zillion filenames along with it (we use `...' instead)
 906 # but we don't want this echoing done when the user has said
 907 # he doesn't want to see commands echoed by using -s.
 908 ifneq   "$(findstring s,$(MAKEFLAGS))" ""       # if -s
 909 +cmdecho        := echo >/dev/null
 910 else                                            # not -s
 911 +cmdecho        := echo
 912 endif                                           # -s
 913
 914 # These are the flags given to the compiler to tell
 915 # it what sort of optimization and/or debugging output to do.
 916 ifndef  +cflags
 917 # If `CFLAGS' was defined, use that.
 918 ifdef           CFLAGS
 919 +cflags := $(filter-out -I%,$(CFLAGS))
 920 endif           # CFLAGS
 921 endif   # +cflags
 922
 923 # If none of the above worked, default to "-g -O".
 924 ifeq    "$(strip $(+cflags))" ""
 925 +cflags := $(default_cflags)
 926 endif   # $(+cflags) == ""
 927
 928 # Force building with -fno-common because hidden_def, compat_symbol
 929 # and other constructs do not work for common symbols (and would
 930 # otherwise require specifying __attribute__ ((nocommon)) on a
 931 # case-by-case basis).
 932 +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) \
 933            $(+stack-protector) -fno-common
 934 +gcc-nowarn := -w
 935
 936 # Each sysdeps directory can contain header files that both will be
 937 # used to compile and will be installed.  Each can also contain an
 938 # include/ subdirectory, whose header files will be used to compile
 939 # but will not be installed, and will take precedence over the
 940 # installed files.  This mirrors the top-level include/ subdirectory.
 941 +sysdep-includes := $(foreach dir,$(+sysdep_dirs),\
 942                               $(addprefix -I,$(wildcard $(dir)/include) $(dir)))
 943
 944 # These are flags given to the C compiler to tell it to look for
 945 # include files (including ones given in angle brackets) in the parent
 946 # library source directory, in the include directory, and in the
 947 # current directory.
 948 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
 949             $(+sysdep-includes) $(includes) \
 950             $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
 951
 952 # Since libio has several internal header files, we use a -I instead
 953 # of many little headers in the include directory.
 954 libio-include = -I$(..)libio
 955
 956 # List of non-library modules that we build.
 957 built-modules = iconvprogs iconvdata ldconfig lddlibc4 libmemusage \
 958                 libSegFault libpcprofile librpcsvc locale-programs \
 959                 memusagestat nonlib nscd extramodules libnldbl libsupport \
 960                 testsuite
 961
 962 in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
 963                                     $(libof-$(<F)) \
 964                                     $(libof-$(@F)) \
 965                                     libc))
 966
 967 # Build ld.so, libc.so and libpthread.so with -ftls-model=initial-exec
 968 tls-model = $(if $(filter libpthread rtld \
 969                           libc,$(in-module)),-ftls-model=initial-exec,)
 970
 971 module-cppflags-real = -include $(common-objpfx)libc-modules.h \
 972                        -DMODULE_NAME=$(in-module)
 973
 974 # We don't need libc-modules.h and the MODULE_NAME definition for .v.i
 975 # files.  These targets don't (and will likely never need to) use the IS_IN
 976 # facility.  In fact, shlib-versions should not use it because that will
 977 # create a circular dependency as libc-modules.h is generated from
 978 # shlib-versions.
 979 module-cppflags = $(if $(filter %.mk.i %.v.i,$(@F)),,$(module-cppflags-real))
 980
 981 # These are the variables that the implicit compilation rules use.
 982 # Note that we can't use -std=* in CPPFLAGS, because it overrides
 983 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
 984 # it causes cpp to stop predefining __ASSEMBLER__.
 985 CPPFLAGS = $(config-extra-cppflags) $(CPPUNDEFS) $(CPPFLAGS-config) \
 986            $($(subdir)-CPPFLAGS) \
 987            $(+includes) $(defines) $(module-cppflags) \
 988            -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
 989            $(CPPFLAGS-$(suffix $@)) \
 990            $(foreach lib,$(libof-$(basename $(@F))) \
 991                          $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
 992            $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
 993
 994 ifneq (no,$(have-tunables))
 995 CPPFLAGS += -DTOP_NAMESPACE=glibc
 996 endif
 997
 998 override CFLAGS = -std=gnu11 -fgnu89-inline $(config-extra-cflags) \
 999                   $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
1000                   $(+extra-math-flags) \
1001                   $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
1002                   $(CFLAGS-$(@F)) $(tls-model) \
1003                   $(foreach lib,$(libof-$(basename $(@F))) \
1004                                 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
1005 # Use our copies of cstdlib and cmath.
1006 override CXXFLAGS = -I$(common-objpfx) $(c++-sysincludes) \
1007                     $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
1008                     $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
1009
1010 # If everything is compiled with -fPIC (implicitly) we must tell this by
1011 # defining the PIC symbol.
1012 ifeq (yes,$(build-pic-default))
1013 pic-default = -DPIC
1014 endif
1015
1016 # Enable object files for different versions of the library.
1017 # Various things use $(object-suffixes) to know what all to make.
1018 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
1019 # to pass different flags for each flavor.
1020 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
1021 # .op may be added to all-object-suffixes below.
1022 all-object-suffixes := .o .os .oS
1023 object-suffixes :=
1024 CPPFLAGS-.o = $(pic-default)
1025 # libc.a must be compiled with -fPIE/-fpie for static PIE.
1026 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) $(pie-default)
1027 libtype.o := lib%.a
1028 object-suffixes += .o
1029 ifeq (yes,$(build-shared))
1030 # Under --enable-shared, we will build a shared library of PIC objects.
1031 # The PIC object files are named foo.os.
1032 object-suffixes += .os
1033 CPPFLAGS-.os = -DPIC -DSHARED
1034 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
1035 libtype.os := lib%_pic.a
1036 # This can be changed by a sysdep makefile
1037 pic-ccflag = -fPIC
1038 # This one should always stay like this unless there is a very good reason.
1039 PIC-ccflag = -fPIC
1040 endif
1041 # This can be changed by a sysdep makefile
1042 pie-ccflag = -fpie
1043 # This one should always stay like this unless there is a very good reason.
1044 PIE-ccflag = -fPIE
1045 ifeq (yes,$(build-profile))
1046 # Under --enable-profile, we will build a static library of profiled objects.
1047 # The profiled object files are named foo.op.
1048 all-object-suffixes += .op
1049 object-suffixes += .op
1050 CPPFLAGS-.op = -DPROF $(pic-default)
1051 # libc_p.a must be compiled with -fPIE/-fpie for static PIE.
1052 CFLAGS-.op = -pg $(pie-default)
1053 libtype.op = lib%_p.a
1054 endif
1055
1056 # Convenience variable for when we want to treat shared-library cases
1057 # differently from the rest.
1058 object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
1059
1060 object-suffixes-for-libc := $(object-suffixes)
1061
1062 ifeq (yes,$(build-shared))
1063 # Build special library that contains the static-only routines for libc.
1064 object-suffixes-for-libc += .oS
1065
1066 # Must build the routines as PIC, though, because they can end up in (users')
1067 # shared objects.  We don't want to use CFLAGS-os because users may, for
1068 # example, make that processor-specific.
1069 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag) $(extra-nonshared-cflags)
1070 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
1071 libtype.oS = lib%_nonshared.a
1072 endif
1073
1074 # The assembler can generate debug information too.
1075 ifndef ASFLAGS
1076 ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
1077 endif
1078 override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
1079
1080 ifndef BUILD_CC
1081 BUILD_CC = $(CC)
1082 endif
1083
1084 move-if-change = $(SHELL) $(..)scripts/move-if-change
1085 \f
1086 -include $(common-objpfx)sysd-sorted
1087 subdirs = $(sorted-subdirs)
1088 subdir-srcdirs = $(foreach dir,$(subdirs),\
1089                            $(firstword $($(dir)-srcdir) $(..)$(dir)))
1090
1091 # This is a pair of implicit rules to preprocess a file with # comments,
1092 # %ifdef et al, based on config.h settings or other %include'd files.
1093 # We use chained rules instead of a pipeline here so that we can properly
1094 # check the exit status of cpp rather than using its bad output when there
1095 # is a preprocessing error.  Another rule should depend on the output file
1096 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
1097 # listing both its input files, and any header files that it may reference
1098 # (but no commands).
1099 %.v.i: $(common-objpfx)config.h $(..)Makeconfig
1100         sed '/^[        ]*%/!s/#.*$$//;/^[      ]*$$/d;s/^[     ]*%/#/' \
1101             $(filter-out FORCE %.h $(..)Makeconfig,$^) \
1102         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
1103                    > $@T
1104         mv -f $@T $@
1105 %.v: %.v.i
1106         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
1107         mv -f $@T $@
1108
1109 ifeq (yes, $(build-shared))
1110
1111 # To generate a header to support more than one ABI for different
1112 # architecture variants, the CPU/Makefile defines abi-variants to be a
1113 # list of names for those variants (e.g. 32 64), and, for each variant,
1114 # defines abi-$(variant)-condition to be the condition for those options
1115 # to use in a C #if condition.  abi-includes may be defined to a list of
1116 # headers to include in the generated header, if the default does not
1117 # suffice.  default-abi is defined to be the ABI for the current glibc
1118 # build.
1119
1120 ifndef abi-includes
1121 abi-includes := bits/wordsize.h
1122 endif
1123
1124 # Process the shlib-versions file, which tells us what shared library
1125 # version numbers to use when we install shared objects on this system.
1126 # We need to wait until $(subdirs) is complete.
1127 ifeq ($(sysd-sorted-done),t)
1128 -include $(common-objpfx)soversions.mk
1129 ifndef avoid-generated
1130 $(common-objpfx)shlib-versions.v.i: \
1131         $(wildcard $(+sysdep_dirs:=/shlib-versions) \
1132                    $(subdir-srcdirs:=/shlib-versions)) \
1133         $(..)shlib-versions
1134
1135 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
1136                               $(common-objpfx)shlib-versions.v
1137         $(AWK) -f $^ > $@T
1138         mv -f $@T $@
1139 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
1140         (while read which lib number setname; do \
1141            eval seen_$$which=1; \
1142            test x"$$which" = xDEFAULT || continue; \
1143            case $$number in \
1144              [0-9]*) echo "$$lib.so-version=.$$number"; \
1145                      echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
1146              *)      echo "$$lib.so-version=$$number"; \
1147                      echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
1148            esac; \
1149          done; \
1150          echo soversions.mk-done = t;) < $< > $@T; exit 0
1151         mv -f $@T $@
1152 endif
1153 endif
1154
1155 postclean-generated += soversions.mk soversions.i \
1156                        shlib-versions.v shlib-versions.v.i
1157
1158 before-compile += $(common-objpfx)libc-modules.h
1159 common-generated += libc-modules.h libc-modules.stmp
1160 ifeq ($(soversions.mk-done),t)
1161 # Generate a header with macro definitions for use with the IS_IN macro.
1162 # These are the possible values for the MODULE_NAME macro defined when building
1163 # sources, to identify which module the translation unit is going to be built
1164 # into.
1165 $(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @:
1166 $(common-objpfx)libc-modules.stmp: $(..)scripts/gen-libc-modules.awk \
1167                                    $(common-objpfx)soversions.i
1168         $(AWK) -v buildlist="$(subst -,_,$(built-modules))" -f $^ > ${@:stmp=T}
1169         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1170         touch $@
1171
1172 endif
1173
1174 # Build the tunables list header early since it could be used by any module in
1175 # glibc.
1176 ifneq (no,$(have-tunables))
1177 before-compile += $(common-objpfx)dl-tunable-list.h
1178 common-generated += dl-tunable-list.h dl-tunable-list.stmp
1179
1180 $(common-objpfx)dl-tunable-list.h: $(common-objpfx)dl-tunable-list.stmp; @:
1181 $(common-objpfx)dl-tunable-list.stmp: \
1182                 $(..)scripts/gen-tunables.awk \
1183                 $(..)elf/dl-tunables.list \
1184                 $(wildcard $(subdirs:%=$(..)%/dl-tunables.list)) \
1185                 $(wildcard $(sysdirs:%=%/dl-tunables.list))
1186         $(AWK) -f $^ > ${@:stmp=T}
1187         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1188         touch $@
1189 endif
1190
1191 # Generate version maps, but wait until sysdep-subdirs is known
1192 ifeq ($(sysd-sorted-done),t)
1193 ifeq ($(build-shared),yes)
1194 -include $(common-objpfx)sysd-versions
1195 -include $(common-objpfx)Versions.mk
1196 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
1197 common-generated += $(version-maps)
1198 postclean-generated += sysd-versions Versions.all abi-versions.h \
1199                        Versions.def Versions.v.i Versions.v Versions.mk
1200
1201 ifndef avoid-generated
1202 ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
1203 sysd-versions-force = FORCE
1204 FORCE:
1205 endif
1206
1207 $(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
1208                               $(common-objpfx)Versions.v
1209         LC_ALL=C $(AWK) -f $^ > $@T
1210         mv -f $@T $@
1211
1212 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
1213                               $(common-objpfx)soversions.i \
1214                               $(common-objpfx)Versions.def
1215         { while read which lib version setname; do \
1216             test x"$$which" = xDEFAULT || continue; \
1217             test -z "$$setname" || echo "$$lib : $$setname"; \
1218           done < $(word 2,$^); \
1219           cat $(word 3,$^); \
1220         } | LC_ALL=C $(AWK) -f $< > $@T
1221         mv -f $@T $@
1222 $(common-objpfx)Versions.mk: $(..)scripts/haveversions.awk \
1223                              $(common-objpfx)Versions.all
1224         $(AWK) -f $^ > $@T
1225         mv -f $@T $@
1226 # See %.v/%.v.i implicit rules in Makeconfig.
1227 $(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
1228                               $(wildcard $(sysdirs:%=%/Versions)) \
1229                               $(sysd-versions-force)
1230 $(common-objpfx)sysd-versions: $(common-objpfx)versions.stmp
1231 $(common-objpfx)versions.stmp: $(common-objpfx)Versions.all \
1232                                $(common-objpfx)Versions.v \
1233                                $(..)scripts/versions.awk
1234         ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
1235           cat $(word 2,$^) \
1236           | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
1237                             -v move_if_change='$(move-if-change)' \
1238                             -f $(word 3,$^); \
1239         ) > $(common-objpfx)sysd-versionsT
1240         mv -f $(common-objpfx)sysd-versionsT $(common-objpfx)sysd-versions
1241         touch $@
1242 endif # avoid-generated
1243 endif # $(build-shared) = yes
1244
1245 -include $(common-objpfx)time64-compat.mk
1246 postclean-generated += time64-compat.mk
1247
1248 $(common-objpfx)time64-compat.mk: $(common-objpfx)time64-compat.mk.i \
1249                                   $(sysd-versions-force)
1250         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
1251         mv -f $@T $@
1252 $(common-objpfx)time64-compat.mk.i: $(..)Makeconfig
1253         printf "#include <time64-compat.h>\n#ifdef TIME64_NON_DEFAULT\nhave-time64-compat = yes\n#endif" \
1254         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - > $@T
1255         mv -f $@T $@
1256
1257
1258 endif # sysd-sorted-done
1259
1260 # The name under which the run-time dynamic linker is installed.
1261 # We are currently going for the convention that `/lib/ld.so.1'
1262 # names the SVR4/ELF ABI-compliant dynamic linker.
1263 ifndef rtld-installed-name
1264 ifdef ld.so-version
1265 rtld-installed-name = $(ld.so-version)
1266 else
1267 rtld-installed-name = ld.so.1
1268 endif
1269 endif
1270
1271 ifndef rtld-version-installed-name
1272 rtld-version-installed-name = ld-$(version).so
1273 endif
1274
1275 endif # build-shared
1276
1277
1278 ifeq ($(build-shared),yes)
1279 libm = $(common-objpfx)math/libm.so$(libm.so-version)
1280 libmvec = $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version)
1281 else
1282 libm = $(common-objpfx)math/libm.a
1283 libmvec = $(common-objpfx)mathvec/libmvec.a
1284 endif
1285
1286 ifeq ($(build-shared),yes)
1287 libsupport = $(common-objpfx)support/libsupport_nonshared.a
1288 else
1289 libsupport = $(common-objpfx)support/libsupport.a
1290 endif
1291
1292 # This is a partial list of subdirectories containing the library source.
1293 # The order is more or less arbitrary.  The sorting step will take care of the
1294 # dependencies and generate sorted-subdirs dynamically.
1295 all-subdirs = csu assert ctype locale intl catgets math setjmp signal       \
1296               stdlib stdio-common libio malloc string wcsmbs time dirent    \
1297               grp pwd posix io termios resource misc socket sysvipc gmon    \
1298               gnulib iconv iconvdata wctype manual shadow gshadow po argp   \
1299               localedata timezone rt conform debug mathvec support          \
1300               dlfcn elf
1301
1302 ifeq ($(build-crypt),yes)
1303 all-subdirs += crypt
1304 rpath-dirs += crypt
1305 endif
1306
1307 ifndef avoid-generated
1308 # sysd-sorted itself will contain rules making the sysd-sorted target
1309 # depend on Depend files.  But if you just added a Depend file to an
1310 # existing directory not in all-subdirs, then sysd-sorted needs to
1311 # be regenerated, so it depends on existing $(sorted-subdirs:=/Depend) files.
1312 all-Depend-files := $(wildcard $(sort \
1313                         $(foreach dir,$(all-subdirs),\
1314                                   $(firstword $($(dir)-srcdir) \
1315                                   $(..)$(dir))/Depend) \
1316                         $(sorted-subdirs:=/Depend)))
1317 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
1318                              $(common-objpfx)config.make $(..)Makeconfig \
1319                              $(wildcard $(sysdirs:=/Subdirs)) \
1320                              $(all-Depend-files)
1321         $(AWK) -f $< \
1322                -v subdirs='$(all-subdirs)' \
1323                -v srcpfx='$(..)' \
1324                $(filter %/Subdirs %/Depend,$^) > $@-tmp
1325         mv -f $@-tmp $@
1326 $(all-Depend-files): ;
1327 endif
1328
1329 # This gives partial TARGET:SOURCE pattern pairs to have rules
1330 # emitted into sysd-rules.  A sysdeps Makeconfig fragment can
1331 # add its own special object file prefix to this list with e.g. foo-%:%
1332 # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
1333 sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
1334
1335 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
1336 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
1337 ifneq (,$(sysdep-makeconfigs))
1338 include $(sysdep-makeconfigs)
1339 endif
1340
1341 # Compute just the target patterns.  Makeconfig has set sysd-rules-patterns.
1342 sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
1343                                          $(firstword $(subst :, ,$p))))
1344
1345 # $(libpthread-routines-var) and $(librt-routines-var) are the make
1346 # variable to which pthread routines need to be added to land in the
1347 # right library.
1348 ifeq ($(pthread-in-libc),yes)
1349 libpthread-routines-var = routines
1350 librt-routines-var = routines
1351 libanl-routines-var = routines
1352 else
1353 libpthread-routines-var = libpthread-routines
1354 librt-routines-var = librt-routines
1355 libanl-routines-var = libanl-routines
1356 endif
1357
1358 # A sysdeps Makeconfig fragment may set libc-reentrant to yes.
1359 ifeq (yes,$(libc-reentrant))
1360 defines += -D_LIBC_REENTRANT
1361
1362 libio-mtsafe = -D_IO_MTSAFE_IO
1363 endif
1364
1365 # The name to give to a test in test results summaries.
1366 test-name = $(strip $(patsubst %.out, %, $(patsubst $(common-objpfx)%, %, $@)))
1367
1368 # Likewise, in XFAIL variable names.
1369 test-xfail-name = $(strip $(patsubst %.out, %, $(patsubst $(objpfx)%, %, $@)))
1370
1371 # Command to output a test status line (such as PASS: test-name).  If
1372 # test-xfail-$(test-xfail-name) has a nonempty value, the status will be
1373 # XPASS or XFAIL rather than PASS or FAIL.
1374 evaluate-test = $(..)scripts/evaluate-test.sh $(test-name) $$? \
1375                   $(if $(test-xfail-$(test-xfail-name)),true,false) \
1376                   $(if $(stop-on-test-failure),true,false) \
1377                   > $(common-objpfx)$(test-name).test-result
1378
1379 endif # Makeconfig not yet included
1380
1381 # Local Variables:
1382 # mode: makefile
1383 # End: