Makeconfig

   1 # Copyright (C) 1991-2003,2004,2005,2006,2007,2008,2009,2010,2011
   2 #       Free Software Foundation, Inc.
   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, write to the Free
  17 # Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18 # 02111-1307 USA.
  19
  20 #
  21 #       Makefile configuration options for the GNU C library.
  22 #
  23 ifneq (,)
  24 This makefile requires GNU Make.
  25 endif
  26
  27 all: # Make this the default goal
  28
  29 ifneq "$(origin +included-Makeconfig)" "file"
  30
  31 +included-Makeconfig := yes
  32
  33 ifdef subdir
  34 .. := ../
  35 endif
  36
  37 # If config.make exists, the source directory was configured,
  38 # so don't try to be clever and find another directory to build in.
  39 ifneq (,$(wildcard $(..)config.make))
  40 ARCH =
  41 machine =
  42 else    # Not configured.
  43 ifndef ARCH
  44 ifdef machine
  45 ARCH = $(machine)
  46 endif # machine
  47 endif # ARCH
  48 endif # config.make
  49
  50 # Directory for object files and libc.a.  If this is not defined, the
  51 # object files live in the subdirectories where their sources live, and
  52 # libc.a lives in the parent directory (this probably doesn't work any
  53 # more).
  54 ifdef ARCH
  55 ifeq ($(filter /%,$(ARCH)),)
  56 objdir := $(..)$(ARCH)
  57 else
  58 objdir = $(ARCH)
  59 endif
  60 endif
  61
  62 # $(common-objdir) is the place to put objects and
  63 # such that are not specific to a single subdir.
  64 ifdef objdir
  65 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
  66 common-objpfx = $(objdir)/
  67 common-objdir = $(objdir)
  68 else
  69 objpfx :=
  70 ifdef ..
  71 common-objpfx = $(..)
  72 common-objdir = ..
  73 else
  74 # This is a kludge.  make wizards might grok.
  75 common-objpfx = sysdeps/../
  76 common-objdir = .
  77 endif
  78 endif
  79
  80 # Root of the sysdeps tree.
  81 sysdep_dir := $(..)sysdeps
  82 export sysdep_dir := $(sysdep_dir)
  83
  84 # Get the values defined by options to `configure'.
  85 include $(common-objpfx)config.make
  86
  87 # What flags to give to sources which call user provided callbacks
  88 uses-callbacks = $(exceptions)
  89
  90 # What flags to give to tests which test stack alignment
  91 stack-align-test-flags =
  92
  93 # We have a special subdir for each binary format.
  94 # For now, only ELF is fully supported.
  95 ifeq ($(elf),yes)
  96 binfmt-subdir = elf
  97 else
  98 # This is probably better than nothing.
  99 binfmt-subdir = aout
 100 endif
 101
 102 # Complete path to sysdep dirs.
 103 # `configure' writes a definition of `config-sysdirs' in `config.make'.
 104 sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
 105
 106 # Add-ons that contribute sysdeps trees get added to the include list
 107 # after sysdeps/generic.  This makes #include <sysdeps/...> work right
 108 # to find specific add-on files without assuming the add-on directory name.
 109 # It also means that headers can go into an add-on's base directory
 110 # instead of the add-on needing a sysdeps/generic of its own.
 111 sysdeps-srcdirs := $(foreach add-on,$(sysdeps-add-ons),\
 112                              $(firstword $(filter /%,$(add-on)) \
 113                                          $(..)$(add-on)))
 114 +sysdep_dirs = $(sysdirs) $(sysdeps-srcdirs)
 115 ifdef objdir
 116 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
 117 endif
 118
 119 # Run config.status to update config.make and config.h.  We don't show the
 120 # dependence of config.h to Make, because it is only touched when it
 121 # changes and so config.status would be run every time; the dependence of
 122 # config.make should suffice to force regeneration and re-exec, and the new
 123 # image will notice if config.h changed.
 124 $(common-objpfx)config.make: $(common-objpfx)config.status \
 125                              $(..)config.make.in $(..)config.h.in
 126         cd $(<D); $(SHELL) $(<F)
 127
 128 # Find all the add-on and sysdeps configure fragments, to make sure we
 129 # re-run configure when any of them changes.
 130 $(common-objpfx)config.status: $(..)version.h $(..)configure \
 131                                $(foreach dir,$(sysdirs),\
 132                                          $(wildcard $(dir)/Implies) \
 133                                          $(patsubst %.in,%,\
 134                                                     $(firstword $(wildcard \
 135  $(addprefix $(dir)/,configure configure.in))))) \
 136                                $(patsubst %.in,%,\
 137                                           $(foreach add-on,$(add-ons),\
 138                                                     $(firstword $(wildcard \
 139  $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
 140              configure configure.in)))))
 141         @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
 142          echo The GNU C library has not been configured. >&2; \
 143          echo Run \`configure\' to configure it before building. >&2; \
 144          echo Try \`configure --help\' for more details. >&2; \
 145          exit 1; fi
 146
 147 # We don't want CPPFLAGS to be exported to the command running configure.
 148 unexport CPPFLAGS
 149
 150 # Get the user's configuration parameters.
 151 ifneq ($(wildcard $(..)configparms),)
 152 include $(..)configparms
 153 endif
 154 ifneq ($(objpfx),)
 155 ifneq ($(wildcard $(common-objpfx)configparms),)
 156 include $(common-objpfx)configparms
 157 endif
 158 endif
 159 \f
 160 ####
 161 ####    These are the configuration variables.  You can define values for
 162 ####    the variables below in the file `configparms'.
 163 ####    Do NOT edit this file.
 164 ####
 165
 166
 167 # Common prefix for machine-independent installation directories.
 168 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
 169 prefix = /usr/local
 170 endif
 171
 172 # Decide whether we shall build the programs or not.  We always do this
 173 # unless the user tells us (in configparms) or we are building for a
 174 # standalone target.
 175 ifndef build-programs
 176 ifneq ($(config-os),none)
 177 build-programs=yes
 178 else
 179 build-programs=no
 180 endif
 181 endif
 182
 183 # Common prefix for machine-dependent installation directories.
 184 ifeq ($(origin exec_prefix),undefined)
 185 exec_prefix = $(prefix)
 186 endif
 187
 188 # Where to install the library and object files.
 189 ifndef libdir
 190 libdir = $(exec_prefix)/lib
 191 endif
 192 inst_libdir = $(install_root)$(libdir)
 193
 194 # Where to install the shared library and dynamic linker.
 195 ifndef slibdir
 196 slibdir = $(exec_prefix)/lib
 197 endif
 198 inst_slibdir = $(install_root)$(slibdir)
 199
 200 # Prefix to put on files installed in $(libdir).  For libraries `libNAME.a',
 201 # the prefix is spliced between `lib' and the name, so the linker switch
 202 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
 203 # just prepended to the whole file name.
 204 ifeq ($(origin libprefix),undefined)
 205 libprefix =
 206 endif
 207
 208 # Where to install the header files.
 209 ifndef includedir
 210 includedir = $(prefix)/include
 211 endif
 212 inst_includedir = $(install_root)$(includedir)
 213
 214 # Where to install machine-independent data files.
 215 # These are the timezone database, and the locale database.
 216 ifndef datadir
 217 datadir = $(prefix)/share
 218 endif
 219 inst_datadir = $(install_root)$(datadir)
 220
 221 # Where to install the timezone data files (which are machine-independent).
 222 ifndef zonedir
 223 zonedir = $(datadir)/zoneinfo
 224 endif
 225 inst_zonedir = $(install_root)$(zonedir)
 226
 227 # Where to install the locale files.
 228 ifndef localedir
 229 localedir = $(libdir)/locale
 230 endif
 231 inst_localedir = $(install_root)$(localedir)
 232
 233 # Where to install the message catalog data files (which are
 234 # machine-independent).
 235 ifndef msgcatdir
 236 msgcatdir = $(datadir)/locale
 237 endif
 238 inst_msgcatdir = $(install_root)$(msgcatdir)
 239
 240 # Where to install the locale charmap source files.
 241 ifndef i18ndir
 242 i18ndir = $(datadir)/i18n
 243 endif
 244 inst_i18ndir = $(install_root)$(i18ndir)
 245
 246 # Where to install the shared object for charset transformation.
 247 ifndef gconvdir
 248 gconvdir = $(libdir)/gconv
 249 endif
 250 inst_gconvdir = $(install_root)$(gconvdir)
 251
 252 # Where to install programs.
 253 ifndef bindir
 254 bindir = $(exec_prefix)/bin
 255 endif
 256 inst_bindir = $(install_root)$(bindir)
 257
 258 # Where to install internal programs.
 259 ifndef libexecdir
 260 libexecdir = $(exec_prefix)/libexec
 261 endif
 262 inst_libexecdir = $(install_root)$(libexecdir)
 263
 264 # Where to install administrative programs.
 265 ifndef rootsbindir
 266 rootsbindir = $(exec_prefix)/sbin
 267 endif
 268 inst_rootsbindir = $(install_root)$(rootsbindir)
 269
 270 ifndef sbindir
 271 sbindir = $(exec_prefix)/sbin
 272 endif
 273 inst_sbindir = $(install_root)$(sbindir)
 274
 275 # Where to install the Info files.
 276 ifndef infodir
 277 infodir = $(prefix)/info
 278 endif
 279 inst_infodir = $(install_root)$(infodir)
 280
 281 # Where to install audit libraries.
 282 ifndef auditdir
 283 auditdir = $(libdir)/audit
 284 endif
 285 inst_auditdir = $(install_root)$(auditdir)
 286
 287 # Where to install default configuration files.  These include the local
 288 # timezone specification and network data base files.
 289 ifndef sysconfdir
 290 sysconfdir = $(prefix)/etc
 291 endif
 292 inst_sysconfdir = $(install_root)$(sysconfdir)
 293
 294 # Directory for the database files and Makefile for nss_db.
 295 ifndef vardbdir
 296 vardbdir = /var/db
 297 endif
 298 inst_vardbdir = $(install_root)$(vardbdir)
 299
 300 # What timezone should be the installed default (e.g., US/Eastern).
 301 # Run `make -C time echo-zonenames' to see a list of available zone names.
 302 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
 303 ifndef localtime
 304 localtime = Factory
 305 endif
 306
 307 # Where to install the "localtime" timezone file; this is the file whose
 308 # contents $(localtime) specifies.  If this is a relative pathname, it is
 309 # relative to $(zonedir).  It is a good idea to put this somewhere
 310 # other than there, so the zoneinfo directory contains only universal data,
 311 # localizing the configuration data elsewhere.
 312 ifndef localtime-file
 313 localtime-file = $(sysconfdir)/localtime
 314 inst_localtime-file = $(install_root)$(localtime-file)
 315 endif
 316
 317 # What to use for leap second specifications in compiling the default
 318 # timezone files.  Set this to `/dev/null' for no leap second handling as
 319 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
 320 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
 321 # This variable determines the default: if it's `/dev/null',
 322 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
 323 ifndef leapseconds
 324 leapseconds = /dev/null
 325 endif
 326
 327 # What timezone's DST rules should be used when a POSIX-style TZ
 328 # environment variable doesn't specify any rules.  For 1003.1 compliance
 329 # this timezone must use rules that are as U.S. federal law defines DST.
 330 # Run `make -C time echo-zonenames' to see a list of available zone names.
 331 # This setting can be changed with `zic -p TIMEZONE' at any time.
 332 # If you want POSIX.1 compatibility, use `America/New_York'.
 333 ifndef posixrules
 334 posixrules = America/New_York
 335 endif
 336
 337 # Where to install the "posixrules" timezone file; this is file
 338 # whose contents $(posixrules) specifies.  If this is a relative
 339 # pathname, it is relative to $(zonedir).
 340 ifndef posixrules-file
 341 posixrules-file = posixrules
 342 endif
 343
 344
 345 # Directory where your system's native header files live.
 346 # This is used on Unix systems to generate some GNU libc header files.
 347 ifndef sysincludedir
 348 sysincludedir = /usr/include
 349 endif
 350
 351
 352 # Commands to install files.
 353 ifndef INSTALL_DATA
 354 INSTALL_DATA = $(INSTALL) -m 644
 355 endif
 356 ifndef INSTALL_SCRIPT
 357 INSTALL_SCRIPT = $(INSTALL)
 358 endif
 359 ifndef INSTALL_PROGRAM
 360 INSTALL_PROGRAM = $(INSTALL)
 361 endif
 362 ifndef INSTALL
 363 INSTALL = install
 364 endif
 365
 366
 367 # The name of the C compiler.
 368 # If you've got GCC, and it works, use it.
 369 ifeq ($(origin CC),default)
 370 CC := gcc
 371 endif
 372
 373 # The name of the C compiler to use for compilations of programs to run on
 374 # the host that is building the library.  If you set CC to a
 375 # cross-compiler, you must set this to the normal compiler.
 376 ifndef BUILD_CC
 377 BUILD_CC = $(CC)
 378 endif
 379
 380 # Default flags to pass the C compiler.
 381 ifndef default_cflags
 382 ifeq ($(release),stable)
 383 default_cflags := -g -O2
 384 else
 385 default_cflags := -g -O
 386 endif
 387 endif
 388
 389 # Flags to pass the C compiler when assembling preprocessed assembly code
 390 # (`.S' files).  On some systems the assembler doesn't understand the `#' line
 391 # directives the preprocessor produces.  If you have troubling compiling
 392 # assembly code, try using -P here to suppress these directives.
 393 ifndef asm-CPPFLAGS
 394 asm-CPPFLAGS =
 395 endif
 396
 397 # ELF always supports init/fini sections
 398 ifeq ($(elf),yes)
 399 have-initfini = yes
 400 endif
 401
 402 ifeq ($(have-as-needed),yes)
 403 as-needed := -Wl,--as-needed
 404 no-as-needed := -Wl,--no-as-needed
 405 else
 406 as-needed :=
 407 no-as-needed :=
 408 endif
 409
 410 # Installed name of the startup code.
 411 ifneq ($(have-initfini),yes)
 412 # When not having init/fini, there is just one startfile, called crt0.o.
 413 start-installed-name = crt0.o
 414 else
 415 # On systems having init/fini, crt0.o is called crt1.o, and there are
 416 # some additional bizarre files.
 417 start-installed-name = crt1.o
 418 endif
 419 # On systems that do not need a special startfile for statically linked
 420 # binaries, simply set it to the normal name.
 421 ifndef static-start-installed-name
 422 static-start-installed-name = $(start-installed-name)
 423 endif
 424
 425 ifeq (yesyesyes,$(build-shared)$(elf)$(have-z-combreloc))
 426 combreloc-LDFLAGS = -Wl,-z,combreloc
 427 LDFLAGS.so += $(combreloc-LDFLAGS)
 428 LDFLAGS-rtld += $(combreloc-LDFLAGS)
 429 endif
 430
 431 relro-LDFLAGS = -Wl,-z,relro
 432 LDFLAGS.so += $(relro-LDFLAGS)
 433 LDFLAGS-rtld += $(relro-LDFLAGS)
 434
 435 ifeq (yes,$(have-hash-style))
 436 # For the time being we unconditionally use 'both'.  At some time we
 437 # should declare statically linked code as 'out of luck' and compile
 438 # with --hash-style=gnu only.
 439 hashstyle-LDFLAGS = -Wl,--hash-style=both
 440 LDFLAGS.so += $(hashstyle-LDFLAGS)
 441 LDFLAGS-rtld += $(hashstyle-LDFLAGS)
 442 endif
 443
 444 # Command for linking programs with the C library.
 445 ifndef +link
 446 +link = $(CC) -nostdlib -nostartfiles -o $@ \
 447               $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 448               $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 449               $(addprefix $(csu-objpfx),$(start-installed-name)) \
 450               $(+preinit) $(+prector) \
 451               $(filter-out $(addprefix $(csu-objpfx),start.o \
 452                                                      $(start-installed-name))\
 453                            $(+preinit) $(link-extra-libs) \
 454                            $(common-objpfx)libc% $(+postinit),$^) \
 455               $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
 456 endif
 457 # Command for linking PIE programs with the C library.
 458 ifndef +link-pie
 459 +link-pie = $(CC) -pie -Wl,-O1 -nostdlib -nostartfiles -o $@ \
 460              $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 461              $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
 462              $(addprefix $(csu-objpfx),S$(start-installed-name)) \
 463              $(+preinit) $(+prectorS) \
 464              $(filter-out $(addprefix $(csu-objpfx),start.o \
 465                                                     S$(start-installed-name))\
 466                           $(+preinit) $(link-extra-libs) \
 467                           $(common-objpfx)libc% $(+postinit),$^) \
 468              $(link-extra-libs) $(link-libc) $(+postctorS) $(+postinit)
 469 endif
 470 # Command for statically linking programs with the C library.
 471 ifndef +link-static
 472 +link-static = $(CC) -nostdlib -nostartfiles -static -o $@ \
 473               $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F))  \
 474               $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
 475               $(+preinit) $(+prector) \
 476               $(filter-out $(addprefix $(csu-objpfx),start.o \
 477                                                      $(start-installed-name))\
 478                            $(+preinit) $(link-extra-libs-static) \
 479                            $(common-objpfx)libc% $(+postinit),$^) \
 480               $(link-extra-libs-static) $(link-libc-static) $(+postctor) $(+postinit)
 481 endif
 482 # Command for statically linking bounded-pointer programs with the C library.
 483 ifndef +link-bounded
 484 +link-bounded = $(CC) -nostdlib -nostartfiles -static -fbounded-pointers -o $@ \
 485               $(sysdep-LDFLAGS) $(LDFLAGS)  \
 486               $(addprefix $(csu-objpfx),b$(static-start-installed-name)) \
 487               $(+preinit) $(+prector) \
 488               $(filter-out $(addprefix $(csu-objpfx),start.ob \
 489                                                      $(start-installed-name))\
 490                            $(+preinit) $(link-extra-libs-bounded) \
 491                            $(common-objpfx)libc% $(+postinit),$^) \
 492               $(link-extra-libs-bounded) $(link-libc-bounded) $(+postctor) $(+postinit)
 493 endif
 494 ifndef config-LDFLAGS
 495 ifeq (yesyes,$(build-shared)$(elf))
 496 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
 497 endif
 498 endif
 499 ifndef link-libc
 500 ifeq (yes,$(build-shared))
 501 ifeq ($(elf),yes)
 502 # We need the versioned name of libc.so in the deps of $(others) et al
 503 # so that the symlink to libc.so is created before anything tries to
 504 # run the linked programs.
 505 link-libc = -Wl,-rpath-link=$(rpath-link) \
 506             $(common-objpfx)libc.so$(libc.so-version) \
 507             $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
 508             $(as-needed) $(common-objpfx)elf/ld.so $(no-as-needed) $(gnulib)
 509 # This is how to find at build-time things that will be installed there.
 510 rpath-dirs = math elf dlfcn nss nis rt resolv crypt
 511 endif
 512 rpath-link = \
 513 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
 514 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
 515 else
 516 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
 517 resolvobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)resolv)
 518 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
 519 endif
 520 endif
 521
 522 # Differences in the linkers on the various platforms.
 523 ifeq ($(elf),yes)
 524 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
 525 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
 526 LDFLAGS-rdynamic = -rdynamic
 527 LDFLAGS-Bsymbolic = -Bsymbolic
 528 endif
 529
 530 # Choose the default search path for the dynamic linker based on
 531 # where we will install libraries.
 532 ifneq ($(libdir),$(slibdir))
 533 default-rpath = $(slibdir):$(libdir)
 534 else
 535 default-rpath = $(libdir)
 536 endif
 537
 538 ifndef link-extra-libs
 539 link-extra-libs = $(LDLIBS-$(@F))
 540 link-extra-libs-static = $(link-extra-libs)
 541 link-extra-libs-bounded = $(link-extra-libs)
 542 endif
 543
 544 # The static libraries.
 545 ifeq (yes,$(build-static))
 546 link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
 547 else
 548 ifeq (yes,$(build-shared))
 549 # We can try to link the programs with lib*_pic.a...
 550 link-libc-static = $(static-gnulib) $(common-objpfx)libc_pic.a
 551 endif
 552 endif
 553 link-libc-bounded = $(common-objpfx)libc_b.a $(gnulib) $(common-objpfx)libc_b.a
 554
 555 ifndef gnulib
 556 ifneq ($(have-cc-with-libunwind),yes)
 557   libunwind =
 558 else
 559   libunwind = -lunwind
 560 endif
 561 ifneq ($(have-as-needed),yes)
 562  libgcc_eh := -lgcc_eh $(libunwind)
 563 else
 564  libgcc_eh := -Wl,--as-needed -lgcc_s$(libgcc_s_suffix) $(libunwind) -Wl,--no-as-needed
 565 endif
 566 gnulib := -lgcc $(libgcc_eh)
 567 static-gnulib := -lgcc -lgcc_eh $(libunwind)
 568 libc.so-gnulib := -lgcc
 569 endif
 570 ifeq ($(elf),yes)
 571 +preinit = $(addprefix $(csu-objpfx),crti.o)
 572 +postinit = $(addprefix $(csu-objpfx),crtn.o)
 573 +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
 574 +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
 575 # Variants of the two previous definitions for linking PIE programs.
 576 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
 577 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
 578 +interp = $(addprefix $(elf-objpfx),interp.os)
 579 endif
 580 csu-objpfx = $(common-objpfx)csu/
 581 elf-objpfx = $(common-objpfx)elf/
 582
 583 # How to run a program we just linked with our library.
 584 # The program binary is assumed to be $(word 2,$^).
 585 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
 586 ifeq (yesyes,$(build-shared)$(elf))
 587 comma = ,
 588 sysdep-library-path = \
 589 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
 590                                        $(filter -Wl$(comma)-rpath-link=%,\
 591                                                 $(sysdep-LDFLAGS)))))
 592 run-program-prefix = $(if $(filter $(notdir $(built-program-file)),\
 593                                    $(tests-static) $(xtests-static)),, \
 594                           $(elf-objpfx)$(rtld-installed-name) \
 595                           --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)))
 596 else
 597 run-program-prefix =
 598 endif
 599 # Never use $(run-program-prefix) for the statically-linked %-bp test programs
 600 built-program-cmd = $(patsubst %,$(run-program-prefix),\
 601                         $(filter-out %-bp,$(built-program-file))) \
 602                     $(built-program-file)
 603
 604 ifndef LD
 605 LD := ld -X
 606 endif
 607
 608 # Extra flags to pass to GCC.
 609 ifeq ($(all-warnings),yes)
 610 +gccwarn := -Wall -Wwrite-strings -Winline -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
 611 else
 612 +gccwarn := -Wall -Wwrite-strings -Winline
 613 endif
 614 +gccwarn-c = -Wstrict-prototypes
 615
 616 # We do not depend on the address of constants in different files to be
 617 # actually different, so allow the compiler to merge them all.
 618 +merge-constants = -fmerge-all-constants
 619
 620 # This is the program that generates makefile dependencies from C source files.
 621 # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
 622 # targets for headers so that removed headers don't break the build.
 623 ifndef +mkdep
 624 +mkdep = $(CC) -M -MP
 625 endif
 626
 627 # The program that makes Emacs-style TAGS files.
 628 ETAGS   := etags
 629
 630 # The `xgettext' program for producing .pot files from sources.
 631 ifndef XGETTEXT
 632 XGETTEXT = xgettext
 633 endif
 634
 635 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
 636 # perhaps others) to preprocess assembly code in some cases.
 637 M4 = m4
 638
 639 # To force installation of files even if they are older than the
 640 # installed files.  This variable is included in the dependency list
 641 # of all installation targets.
 642 ifeq ($(force-install),yes)
 643 +force = force-install
 644 else
 645 +force =
 646 endif
 647
 648 ####
 649 #### End of configuration variables.
 650 ####
 651 \f
 652 # This tells some versions of GNU make before 3.63 not to export all variables.
 653 .NOEXPORT:
 654
 655 # We want to echo the commands we're running without
 656 # umpteen zillion filenames along with it (we use `...' instead)
 657 # but we don't want this echoing done when the user has said
 658 # he doesn't want to see commands echoed by using -s.
 659 ifneq   "$(findstring s,$(MAKEFLAGS))" ""       # if -s
 660 +cmdecho        := echo >/dev/null
 661 else                                            # not -s
 662 +cmdecho        := echo
 663 endif                                           # -s
 664
 665 # These are the flags given to the compiler to tell
 666 # it what sort of optimization and/or debugging output to do.
 667 ifndef  +cflags
 668 # If `CFLAGS' was defined, use that.
 669 ifdef           CFLAGS
 670 +cflags := $(filter-out -I%,$(CFLAGS))
 671 endif           # CFLAGS
 672 endif   # +cflags
 673
 674 # If none of the above worked, default to "-g -O".
 675 ifeq    "$(strip $(+cflags))" ""
 676 +cflags := $(default_cflags)
 677 endif   # $(+cflags) == ""
 678
 679 +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants)
 680 +gcc-nowarn := -w
 681
 682 # Don't duplicate options if we inherited variables from the parent.
 683 +cflags := $(sort $(+cflags))
 684
 685 # These are flags given to the C compiler to tell it to look for
 686 # include files (including ones given in angle brackets) in the parent
 687 # library source directory, in the include directory, and in the
 688 # current directory.
 689 +sysdep-includes = $(addprefix -I,$(+sysdep_dirs))
 690 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
 691             $(+sysdep-includes) $(includes) \
 692             $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
 693
 694 # Since libio has several internal header files, we use a -I instead
 695 # of many little headers in the include directory.
 696 libio-include = -I$(..)libio
 697
 698 # These are the variables that the implicit compilation rules use.
 699 # Note that we can't use -std=* in CPPFLAGS, because it overrides
 700 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
 701 # it causes cpp to stop predefining __ASSEMBLER__.
 702 CPPFLAGS = $($(subdir)-CPPFLAGS) $(+includes) $(defines) \
 703            -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
 704            $(CPPFLAGS-$(suffix $@)) \
 705            $(foreach lib,$(libof-$(basename $(@F))) \
 706                          $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
 707            $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
 708 override CFLAGS = -std=gnu99 $(gnu89-inline-CFLAGS) \
 709                   $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
 710                   $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
 711                   $(CFLAGS-$(@F)) \
 712                   $(foreach lib,$(libof-$(basename $(@F))) \
 713                                 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
 714 override CXXFLAGS = $(c++-sysincludes) \
 715                     $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
 716                     $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
 717
 718 # If everything is compiled with -fPIC (implicitly) we must tell this by
 719 # defining the PIC symbol.
 720 ifeq (yes,$(build-pic-default))
 721 pic-default = -DPIC
 722 endif
 723
 724 # Enable object files for different versions of the library.
 725 # Various things use $(object-suffixes) to know what all to make.
 726 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
 727 # to pass different flags for each flavor.
 728 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
 729 all-object-suffixes := .o .os .op .og .ob .oS
 730 object-suffixes :=
 731 CPPFLAGS-.o = $(pic-default)
 732 CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
 733 ifeq (yes,$(build-static))
 734 libtype.o := lib%.a
 735 object-suffixes += .o
 736 endif
 737 ifeq (yes,$(build-shared))
 738 # Under --enable-shared, we will build a shared library of PIC objects.
 739 # The PIC object files are named foo.os.
 740 object-suffixes += .os
 741 CPPFLAGS-.os = -DPIC -DSHARED
 742 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
 743 libtype.os := lib%_pic.a
 744 # This can be changed by a sysdep makefile
 745 pic-ccflag = -fPIC
 746 # This one should always stay like this unless there is a very good reason.
 747 PIC-ccflag = -fPIC
 748 endif
 749 # This can be changed by a sysdep makefile
 750 pie-ccflag = -fpie
 751 # This one should always stay like this unless there is a very good reason.
 752 PIE-ccflag = -fPIE
 753 ifeq (yes,$(build-profile))
 754 # Under --enable-profile, we will build a static library of profiled objects.
 755 # The profiled object files are named foo.op.
 756 object-suffixes += .op
 757 CPPFLAGS-.op = -DPROF $(pic-default)
 758 CFLAGS-.op = -pg
 759 libtype.op = lib%_p.a
 760 endif
 761 ifeq (yes,$(build-omitfp))
 762 # Under --enable-omitfp, we build the library optimized without
 763 # debugging information using -fomit-frame-pointer, and build an extra
 764 # library with debugging information.  The debuggable objects are named foo.og.
 765 object-suffixes += .og
 766 CPPFLAGS-.og = $(pic-default)
 767 CFLAGS-.og = -g
 768 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
 769 CFLAGS-.os += -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
 770 libtype.og = lib%_g.a
 771 endif
 772
 773 bppfx = BP-
 774 ifeq (yes,$(build-bounded))
 775 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
 776 # to runtime bounds checking.  The bounded-pointer objects are named foo.ob.
 777 # We disable sibling-call optimizations so that stack traces will be complete
 778 # and thus aid debugging, since after all, BPs are a debugging tool.
 779 object-suffixes += .ob
 780 CPPFLAGS-.ob = -fbounded-pointers $(pic-default)
 781 CFLAGS-.ob = -g -O2 -fno-optimize-sibling-calls -fno-strict-aliasing
 782 libtype.ob = lib%_b.a
 783 endif
 784
 785 object-suffixes-for-libc := $(object-suffixes)
 786
 787 ifeq (yes,$(build-shared))
 788 # Build special library that contains the static-only routines for libc.
 789 object-suffixes-for-libc += .oS
 790
 791 # Must build the routines as PIC, though, because they can end up in (users')
 792 # shared objects.  We don't want to use CFLAGS-os because users may, for
 793 # example, make that processor-specific.
 794 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag)
 795 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
 796 libtype.oS = lib%_nonshared.a
 797 endif
 798
 799 # The assembler can generate debug information too.
 800 ifndef ASFLAGS
 801 ifeq ($(have-cpp-asm-debuginfo),yes)
 802 ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
 803 else
 804 ASFLAGS :=
 805 endif
 806 endif
 807 ASFLAGS += $(ASFLAGS-config) $(asflags-cpu)
 808
 809 ifndef BUILD_CC
 810 BUILD_CC = $(CC)
 811 endif
 812
 813 move-if-change = $(SHELL) $(..)scripts/move-if-change
 814 \f
 815 -include $(common-objpfx)sysd-sorted
 816 subdirs = $(sorted-subdirs)
 817 subdir-srcdirs = $(foreach dir,$(subdirs),\
 818                            $(firstword $($(dir)-srcdir) $(..)$(dir)))
 819
 820 ifeq (yes, $(build-shared))
 821
 822 # This is a pair of implicit rules to preprocess a file with # comments,
 823 # %ifdef et al, based on config.h settings or other %include'd files.
 824 # We use chained rules instead of a pipeline here so that we can properly
 825 # check the exit status of cpp rather than using its bad output when there
 826 # is a preprocessing error.  Another rule should depend on the output file
 827 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
 828 # listing both its input files, and any header files that it may reference
 829 # (but no commands).
 830 %.v.i: $(common-objpfx)config.h $(..)Makeconfig
 831         sed '/^[        ]*%/!s/#.*$$//;/^[      ]*$$/d;s/^[     ]*%/#/' \
 832             $(filter-out FORCE %.h $(..)Makeconfig,$^) \
 833         | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
 834                    > $@T
 835         mv -f $@T $@
 836 %.v: %.v.i
 837         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
 838         mv -f $@T $@
 839
 840 # Process the shlib-versions file, which tells us what shared library
 841 # version numbers to use when we install shared objects on this system.
 842 # We need to wait until $(subdirs) is complete.
 843 ifeq ($(sysd-sorted-done),t)
 844 -include $(common-objpfx)soversions.mk
 845 ifndef avoid-generated
 846 # This lets add-ons give more-specific matches that override defaults
 847 # in the top-level file.
 848 $(common-objpfx)shlib-versions.v.i: \
 849         $(wildcard $(+sysdep_dirs:=/shlib-versions) \
 850                    $(subdir-srcdirs:=/shlib-versions)) \
 851         $(..)shlib-versions
 852
 853 soversions-default-setname = $(patsubst %, %,\
 854                                         $(filter-out %_default,\
 855                                                      $(oldest-abi:%=GLIBC_%)))
 856 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
 857                               $(common-objpfx)shlib-versions.v
 858         $(AWK) -v default_setname='$(soversions-default-setname)' \
 859                -v cpu='$(config-machine)' \
 860                -v vendor='$(config-vendor)' \
 861                -v os='$(config-os)' \
 862                -f $^ > $@T
 863         mv -f $@T $@
 864 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
 865         (seen_DEFAULT=0; seen_WORDSIZE32=0; seen_WORDSIZE64=0; \
 866          while read which lib number setname; do \
 867            eval seen_$$which=1; \
 868            test x"$$which" != xABI || echo abi-name = "$$lib"; \
 869            test x"$$which" = xDEFAULT || continue; \
 870            case $$number in \
 871              [0-9]*) echo "$$lib.so-version=.$$number"; \
 872                      echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
 873              *)      echo "$$lib.so-version=$$number"; \
 874                      echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
 875            esac; \
 876          done; \
 877          case "$$seen_DEFAULT$$seen_WORDSIZE32$$seen_WORDSIZE64" in \
 878            100) echo biarch = no;; \
 879            101) echo biarch = 32;; \
 880            ?1?) echo biarch = 64;; \
 881            *) echo >&2 BUG; exit 2;; \
 882          esac; \
 883          echo soversions.mk-done = t;) < $< > $@T; exit 0
 884         mv -f $@T $@
 885 endif
 886 endif
 887
 888 postclean-generated += soversions.mk soversions.i \
 889                        shlib-versions.v shlib-versions.v.i
 890
 891 # Generate the header containing the names of all shared libraries.
 892 # We use a stamp file to avoid unnecessary recompilations.
 893 before-compile += $(common-objpfx)gnu/lib-names.h
 894 ifeq ($(soversions.mk-done),t)
 895 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp; @:
 896 $(common-objpfx)gnu/lib-names.stmp: $(..)scripts/lib-names.awk \
 897                                     $(common-objpfx)soversions.i
 898         $(make-target-directory)
 899         @rm -f ${@:stmp=T} $@
 900         LC_ALL=C $(AWK) -f $^ > ${@:stmp=T}
 901         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
 902         touch $@
 903 endif
 904
 905 common-generated += gnu/lib-names.h gnu/lib-names.stmp
 906
 907 # The name under which the run-time dynamic linker is installed.
 908 # We are currently going for the convention that `/lib/ld.so.1'
 909 # names the SVR4/ELF ABI-compliant dynamic linker.
 910 ifndef rtld-installed-name
 911 ifdef ld.so-version
 912 rtld-installed-name = $(ld.so-version)
 913 else
 914 rtld-installed-name = ld.so.1
 915 endif
 916 endif
 917
 918 ifndef rtld-version-installed-name
 919 rtld-version-installed-name = ld-$(version).so
 920 endif
 921
 922 endif # build-shared
 923
 924
 925 ifeq ($(elf),yes)
 926 dlfcn = dlfcn
 927 ifeq ($(build-shared),yes)
 928 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
 929 else
 930 libdl = $(common-objpfx)dlfcn/libdl.a
 931 endif
 932 else
 933 ifneq (,$(findstring aix,$(config-os)))
 934 ifeq ($(build-shared),yes)
 935 dlfcn = dlfcn
 936 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
 937 else
 938 # No libdl without shared libs on AIX
 939 dlfcn =
 940 libdl =
 941 endif
 942 else
 943 # No ELF, no AIX - no libdl, at least for now.
 944 dlfcn =
 945 libdl =
 946 endif
 947 endif
 948
 949 # These are the subdirectories containing the library source.  The order
 950 # is more or less arbitrary.  The sorting step will take care of the
 951 # dependencies.
 952 all-subdirs = csu assert ctype locale intl catgets math setjmp signal       \
 953               stdlib stdio-common libio malloc string wcsmbs time dirent    \
 954               grp pwd posix io termios resource misc socket sysvipc gmon    \
 955               gnulib iconv iconvdata wctype manual shadow gshadow po argp   \
 956               crypt nss localedata timezone rt conform debug                \
 957               $(add-on-subdirs) $(dlfcn) $(binfmt-subdir)
 958
 959 ifndef avoid-generated
 960 all-Depend-files := $(wildcard $(foreach dir,$(all-subdirs),\
 961                                          $(firstword $($(dir)-srcdir) \
 962                                                      $(..)$(dir))/Depend))
 963 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
 964                              $(common-objpfx)config.make $(..)Makeconfig \
 965                              $(wildcard $(sysdirs:=/Subdirs)) \
 966                              $(all-Depend-files)
 967         $(AWK) -f $< \
 968                -v subdirs='$(all-subdirs)' \
 969                -v srcpfx='$(..)' \
 970                $(filter %/Subdirs %/Depend,$^) > $@-tmp
 971         mv -f $@-tmp $@
 972 $(all-Depend-files): ;
 973 endif
 974
 975 # This gives partial TARGET:SOURCE pattern pairs to have rules
 976 # emitted into sysd-rules.  A sysdeps Makeconfig fragment can
 977 # add its own special object file prefix to this list with e.g. foo-%:%
 978 # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
 979 sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
 980
 981 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
 982 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
 983 ifneq (,$(sysdep-makeconfigs))
 984 include $(sysdep-makeconfigs)
 985 endif
 986
 987 # Compute just the target patterns.  Makeconfig has set sysd-rules-patterns.
 988 sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
 989                                          $(firstword $(subst :, ,$p))))
 990
 991 endif # Makeconfig not yet included
 992
 993 # Local Variables:
 994 # mode: makefile
 995 # End: