libstdc++-v3/configure.in

   1 # Process this file with autoconf to produce a configure script, like so:
   2 # aclocal && autoconf && autoheader && automake
   3
   4 AC_PREREQ(2.13)
   5 AC_INIT(src/ios.cc)
   6
   7 # This works around the fact that libtool configuration may change LD
   8 # for this particular configuration, but some shells, instead of
   9 # keeping the changes in LD private, export them just because LD is
  10 # exported.  Only used at the end of this file.
  11 ORIGINAL_LD_FOR_MULTILIBS=$LD
  12
  13 PACKAGE=libstdc++
  14 AC_SUBST(PACKAGE)
  15 # For libtool versioning info, format is CURRENT:REVISION:AGE
  16 libtool_VERSION=6:0:0
  17 AC_SUBST(libtool_VERSION)
  18
  19 GLIBCPP_TOPREL_CONFIGURE
  20
  21 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
  22 #
  23 # You will slowly go insane if you do not grok the following fact:  when
  24 # building v3 as part of the compiler, the top-level /target/ becomes the
  25 # library's /host/.  `configure' then causes --target to default to --host,
  26 # exactly like any other package using autoconf.  Therefore, 'target' and
  27 # 'host' will always be the same.  This makes sense both for native and
  28 # cross compilers, just think about it for a little while.  :-)
  29 #
  30 # Also, if v3 is being configured as part of a cross compiler, the top-level
  31 # configure script will pass the "real" host as $with_cross_host.
  32 #
  33 # AC 2.5x sets target_alias iff the user specified --target, but we use it
  34 # everywhere, so we set it here just to be sure.  In AC 2.13
  35 # AC_CANONICAL_TARGET was known as AC_CANONICAL_SYSTEM.
  36 AC_CANONICAL_SYSTEM
  37 target_alias=${target_alias-$target}
  38 AC_SUBST(target_alias)
  39
  40 # Runs configure.target, finds CC, CXX and assorted other critical bits.
  41 # Must run this before the GLIBCPP_ENABLE_* macros below.
  42 GLIBCPP_CONFIGURE(.)
  43
  44 AM_INIT_AUTOMAKE($PACKAGE, $gcc_version)
  45 AM_CONFIG_HEADER(config.h)
  46
  47 AC_LIBTOOL_DLOPEN
  48 AM_PROG_LIBTOOL
  49 AC_SUBST(enable_shared)
  50 AC_SUBST(enable_static)
  51
  52 # Check for c++ or library specific bits that don't require linking.
  53 #GLIBCPP_CHECK_COMPILER_VERSION
  54 GLIBCPP_CHECK_GNU_MAKE
  55
  56 # Enable all the variable C++ stuff.  C_MBCHAR must come early.
  57 GLIBCPP_ENABLE_CSTDIO
  58 GLIBCPP_ENABLE_CLOCALE
  59 GLIBCPP_ENABLE_CHEADERS([$c_model])
  60 GLIBCPP_ENABLE_C_MBCHAR([yes])
  61 GLIBCPP_ENABLE_C99([yes])
  62 GLIBCPP_ENABLE_LONG_LONG([yes])
  63 GLIBCPP_ENABLE_THREADS
  64 GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
  65 GLIBCPP_ENABLE_LIBUNWIND_EXCEPTIONS
  66 GLIBCPP_ENABLE_CONCEPT_CHECKS
  67 GLIBCPP_ENABLE_CXX_FLAGS
  68 GLIBCPP_ENABLE_DEBUG([no])
  69 GLIBCPP_ENABLE_DEBUG_FLAGS([none])
  70
  71 # Check for headers necessary for libsupc++ using dyn-string.c/cxa_demangle.c
  72 AC_CHECK_HEADERS(string.h stdlib.h)
  73
  74 # No surprises, no surprises...
  75 if test $ATOMICITYH = cpu/generic ; then
  76   AC_MSG_WARN([No native atomic operations are provided yet for this platform.])
  77   if test $target_thread_file = single; then
  78     AC_MSG_WARN([They cannot be faked when thread support is disabled.])
  79     AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
  80   else
  81     AC_MSG_WARN([They will be faked using a mutex.])
  82     AC_MSG_WARN([Performance of certain classes will degrade as a result.])
  83   fi
  84 fi
  85
  86
  87 if test -n "$with_cross_host" || test x"$build" != x"$host"; then
  88
  89   # We are being configured with some form of cross compiler.
  90   GLIBCPP_IS_CROSS_COMPILING=1
  91
  92   # This lets us hard-code the functionality we know we'll have in the cross
  93   # target environment.  "Let" is a sugar-coated word placed on an especially
  94   # dull and tedious hack, actually.
  95   #
  96   # Here's why GLIBCPP_CHECK_MATH_SUPPORT, and other autoconf macros
  97   # that involve linking, can't be used:
  98   #    "cannot open sim-crt0.o"
  99   #    "cannot open crt0.o"
 100   # etc.  All this is because there currently exists no unified, consistent
 101   # way for top level CC information to be passed down to target directories:
 102   # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
 103   # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
 104   # crosses can be removed.
 105
 106   # If Canadian cross, then don't pick up tools from the build directory.
 107   # Used in GLIBCPP_EXPORT_INCLUDES (and nowhere else?).
 108   if test -n "$with_cross_host" && test x"$build" != x"$with_cross_host"; then
 109     CANADIAN=yes
 110   else
 111     CANADIAN=no
 112   fi
 113
 114   # Construct crosses by hand, eliminating bits that need ld...
 115   # GLIBCPP_CHECK_COMPILER_FEATURES
 116   # GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
 117   # GLIBCPP_CHECK_MATH_SUPPORT
 118
 119   case "$target" in
 120     *-linux*)
 121       os_include_dir="os/gnu-linux"
 122       AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h \
 123         machine/endian.h machine/param.h sys/machine.h sys/types.h \
 124         fp.h locale.h float.h inttypes.h])
 125       SECTION_FLAGS='-ffunction-sections -fdata-sections'
 126       AC_SUBST(SECTION_FLAGS)
 127       GLIBCPP_CHECK_LINKER_FEATURES
 128       GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 129       GLIBCPP_CHECK_WCHAR_T_SUPPORT
 130       AC_DEFINE(HAVE_COPYSIGN)
 131       AC_DEFINE(HAVE_COPYSIGNF)
 132       AC_DEFINE(HAVE_FINITE)
 133       AC_DEFINE(HAVE_FINITEF)
 134       AC_DEFINE(HAVE_FREXPF)
 135       AC_DEFINE(HAVE_HYPOTF)
 136       AC_DEFINE(HAVE_ISINF)
 137       AC_DEFINE(HAVE_ISINFF)
 138       AC_DEFINE(HAVE_ISNAN)
 139       AC_DEFINE(HAVE_ISNANF)
 140       AC_DEFINE(HAVE_SINCOS)
 141       AC_DEFINE(HAVE_SINCOSF)
 142       if test x"long_double_math_on_this_cpu" = x"yes"; then
 143         AC_DEFINE(HAVE_FINITEL)
 144         AC_DEFINE(HAVE_HYPOTL)
 145         AC_DEFINE(HAVE_ISINFL)
 146         AC_DEFINE(HAVE_ISNANL)
 147       fi
 148       ;;
 149     *-hpux*)
 150       # Check for available headers.
 151       AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h \
 152         machine/endian.h machine/param.h sys/machine.h sys/types.h \
 153         fp.h locale.h float.h inttypes.h])
 154       SECTION_FLAGS='-ffunction-sections -fdata-sections'
 155       AC_SUBST(SECTION_FLAGS)
 156       GLIBCPP_CHECK_LINKER_FEATURES
 157       GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 158       GLIBCPP_CHECK_WCHAR_T_SUPPORT
 159       os_include_dir="os/hpux"
 160       AC_DEFINE(HAVE_COPYSIGN)
 161       AC_DEFINE(HAVE_COPYSIGNF)
 162       AC_DEFINE(HAVE_FREXPF)
 163       AC_DEFINE(HAVE_HYPOT)
 164       case "$target" in
 165         *-hpux10*)
 166           AC_DEFINE(HAVE_FINITE)
 167           AC_DEFINE(HAVE_FINITEF)
 168           AC_DEFINE(HAVE_ISINF)
 169           AC_DEFINE(HAVE_ISINFF)
 170           AC_DEFINE(HAVE_ISNAN)
 171           AC_DEFINE(HAVE_ISNANF)
 172           ;;
 173       esac
 174
 175       ;;
 176     *-netbsd*)
 177       # Check for available headers.
 178       AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h \
 179         machine/endian.h machine/param.h sys/machine.h sys/types.h \
 180         fp.h locale.h float.h inttypes.h])
 181       SECTION_FLAGS='-ffunction-sections -fdata-sections'
 182       AC_SUBST(SECTION_FLAGS)
 183       GLIBCPP_CHECK_LINKER_FEATURES
 184       GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 185       GLIBCPP_CHECK_WCHAR_T_SUPPORT
 186       os_include_dir="os/bsd/netbsd"
 187       AC_DEFINE(HAVE_COPYSIGN)
 188       AC_DEFINE(HAVE_COPYSIGNF)
 189       AC_DEFINE(HAVE_FINITEF)
 190       AC_DEFINE(HAVE_FINITE)
 191       AC_DEFINE(HAVE_FREXPF)
 192       AC_DEFINE(HAVE_HYPOTF)
 193       AC_DEFINE(HAVE_ISINF)
 194       AC_DEFINE(HAVE_ISINFF)
 195       AC_DEFINE(HAVE_ISNAN)
 196       AC_DEFINE(HAVE_ISNANF)
 197       if test x"long_double_math_on_this_cpu" = x"yes"; then
 198         AC_DEFINE(HAVE_FINITEL)
 199         AC_DEFINE(HAVE_ISINFL)
 200         AC_DEFINE(HAVE_ISNANL)
 201       fi
 202       ;;
 203     *-freebsd*)
 204       # Check for available headers.
 205       AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h \
 206         machine/endian.h machine/param.h sys/machine.h sys/types.h \
 207         fp.h locale.h float.h inttypes.h sys/resource.h sys/stat.h \
 208         sys/time.h unistd.h])
 209       SECTION_FLAGS='-ffunction-sections -fdata-sections'
 210       AC_SUBST(SECTION_FLAGS)
 211       GLIBCPP_CHECK_LINKER_FEATURES
 212       GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 213       GLIBCPP_CHECK_WCHAR_T_SUPPORT
 214       os_include_dir="os/bsd/freebsd"
 215       AC_DEFINE(HAVE_LC_MESSAGES)
 216       AC_DEFINE(HAVE_DRAND48)
 217       AC_DEFINE(HAVE_GETPAGESIZE)
 218       AC_DEFINE(HAVE_SETENV)
 219       AC_DEFINE(HAVE_SIGSETJMP)
 220       AC_DEFINE(HAVE_COPYSIGN)
 221       AC_DEFINE(HAVE_COPYSIGNF)
 222       AC_DEFINE(HAVE_FINITEF)
 223       AC_DEFINE(HAVE_FINITE)
 224       AC_DEFINE(HAVE_FREXPF)
 225       AC_DEFINE(HAVE_HYPOT)
 226       AC_DEFINE(HAVE_HYPOTF)
 227       AC_DEFINE(HAVE_ISINF)
 228       AC_DEFINE(HAVE_ISNAN)
 229       AC_DEFINE(HAVE_ISNANF)
 230       if test x"long_double_math_on_this_cpu" = x"yes"; then
 231         AC_DEFINE(HAVE_FINITEL)
 232         AC_DEFINE(HAVE_ISINFL)
 233         AC_DEFINE(HAVE_ISNANL)
 234       fi
 235       ;;
 236     *-mingw32*)
 237       AC_CHECK_HEADERS([sys/types.h locale.h float.h])
 238       GLIBCPP_CHECK_LINKER_FEATURES
 239       GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 240       GLIBCPP_CHECK_WCHAR_T_SUPPORT
 241       os_include_dir="os/mingw32"
 242       ;;
 243     *-windiss*)
 244       os_include_dir="os/windiss"
 245       ;;
 246 changequote(,)dnl
 247     *-qnx6.[12]*)
 248 changequote([,])dnl
 249       SECTION_FLAGS='-ffunction-sections -fdata-sections'
 250       AC_SUBST(SECTION_FLAGS)
 251       GLIBCPP_CHECK_LINKER_FEATURES
 252       GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 253       GLIBCPP_CHECK_WCHAR_T_SUPPORT
 254       os_include_dir="os/qnx/qnx6.1"
 255       AC_DEFINE(HAVE_COSF)
 256       AC_DEFINE(HAVE_COSL)
 257       AC_DEFINE(HAVE_COSHF)
 258       AC_DEFINE(HAVE_COSHL)
 259       AC_DEFINE(HAVE_LOGF)
 260       AC_DEFINE(HAVE_LOGL)
 261       AC_DEFINE(HAVE_LOG10F)
 262       AC_DEFINE(HAVE_LOG10L)
 263       AC_DEFINE(HAVE_SINF)
 264       AC_DEFINE(HAVE_SINL)
 265       AC_DEFINE(HAVE_SINHF)
 266       AC_DEFINE(HAVE_SINHL)
 267       ;;
 268     *)
 269       os_include_dir="os/newlib"
 270       AC_DEFINE(HAVE_HYPOT)
 271       ;;
 272   esac
 273
 274   case "$target" in
 275     *-mingw32*)
 276       ;;
 277     *-windiss*)
 278       AC_DEFINE(HAVE_ACOSF)
 279       AC_DEFINE(HAVE_ASINF)
 280       AC_DEFINE(HAVE_ATAN2F)
 281       AC_DEFINE(HAVE_ATANF)
 282       AC_DEFINE(HAVE_CEILF)
 283       AC_DEFINE(HAVE_COPYSIGN)
 284       AC_DEFINE(HAVE_COPYSIGNF)
 285       AC_DEFINE(HAVE_COSF)
 286       AC_DEFINE(HAVE_COSHF)
 287       AC_DEFINE(HAVE_EXPF)
 288       AC_DEFINE(HAVE_FABSF)
 289       AC_DEFINE(HAVE_FLOORF)
 290       AC_DEFINE(HAVE_FMODF)
 291       AC_DEFINE(HAVE_FREXPF)
 292       AC_DEFINE(HAVE_LDEXPF)
 293       AC_DEFINE(HAVE_LOG10F)
 294       AC_DEFINE(HAVE_LOGF)
 295       AC_DEFINE(HAVE_MODFF)
 296       AC_DEFINE(HAVE_POWF)
 297       AC_DEFINE(HAVE_SINF)
 298       AC_DEFINE(HAVE_SINHF)
 299       AC_DEFINE(HAVE_SQRTF)
 300       AC_DEFINE(HAVE_TANF)
 301       AC_DEFINE(HAVE_TANHF)
 302       ;;
 303     *-freebsd*)
 304       # Must replicate generic section since we don't have strtof or strtold.
 305       AC_DEFINE(HAVE_MMAP)
 306       AC_DEFINE(HAVE_ACOSF)
 307       AC_DEFINE(HAVE_ASINF)
 308       AC_DEFINE(HAVE_ATAN2F)
 309       AC_DEFINE(HAVE_ATANF)
 310       AC_DEFINE(HAVE_CEILF)
 311       AC_DEFINE(HAVE_COPYSIGN)
 312       AC_DEFINE(HAVE_COPYSIGNF)
 313       AC_DEFINE(HAVE_COSF)
 314       AC_DEFINE(HAVE_COSHF)
 315       AC_DEFINE(HAVE_EXPF)
 316       AC_DEFINE(HAVE_FABSF)
 317       AC_DEFINE(HAVE_FLOORF)
 318       AC_DEFINE(HAVE_FMODF)
 319       AC_DEFINE(HAVE_FREXPF)
 320       AC_DEFINE(HAVE_LDEXPF)
 321       AC_DEFINE(HAVE_LOG10F)
 322       AC_DEFINE(HAVE_LOGF)
 323       AC_DEFINE(HAVE_MODFF)
 324       AC_DEFINE(HAVE_POWF)
 325       AC_DEFINE(HAVE_SINF)
 326       AC_DEFINE(HAVE_SINHF)
 327       AC_DEFINE(HAVE_SQRTF)
 328       AC_DEFINE(HAVE_TANF)
 329       AC_DEFINE(HAVE_TANHF)
 330       ;;
 331     *)
 332       # GLIBCPP_CHECK_STDLIB_SUPPORT
 333       AC_DEFINE(HAVE_STRTOF)
 334       AC_DEFINE(HAVE_STRTOLD)
 335       # AC_FUNC_MMAP
 336       AC_DEFINE(HAVE_MMAP)
 337
 338       AC_DEFINE(HAVE_ACOSF)
 339       AC_DEFINE(HAVE_ASINF)
 340       AC_DEFINE(HAVE_ATAN2F)
 341       AC_DEFINE(HAVE_ATANF)
 342       AC_DEFINE(HAVE_CEILF)
 343       AC_DEFINE(HAVE_COPYSIGN)
 344       AC_DEFINE(HAVE_COPYSIGNF)
 345       AC_DEFINE(HAVE_COSF)
 346       AC_DEFINE(HAVE_COSHF)
 347       AC_DEFINE(HAVE_EXPF)
 348       AC_DEFINE(HAVE_FABSF)
 349       AC_DEFINE(HAVE_FLOORF)
 350       AC_DEFINE(HAVE_FMODF)
 351       AC_DEFINE(HAVE_FREXPF)
 352       AC_DEFINE(HAVE_LDEXPF)
 353       AC_DEFINE(HAVE_LOG10F)
 354       AC_DEFINE(HAVE_LOGF)
 355       AC_DEFINE(HAVE_MODFF)
 356       AC_DEFINE(HAVE_POWF)
 357       AC_DEFINE(HAVE_SINF)
 358       AC_DEFINE(HAVE_SINHF)
 359       AC_DEFINE(HAVE_SQRTF)
 360       AC_DEFINE(HAVE_TANF)
 361       AC_DEFINE(HAVE_TANHF)
 362       ;;
 363   esac
 364
 365   # At some point, we should differentiate between architectures
 366   # like x86, which have long double versions, and alpha/powerpc/etc.,
 367   # which don't. For the time being, punt.
 368   if test x"long_double_math_on_this_cpu" = x"yes"; then
 369     AC_DEFINE(HAVE_ACOSL)
 370     AC_DEFINE(HAVE_ASINL)
 371     AC_DEFINE(HAVE_ATAN2L)
 372     AC_DEFINE(HAVE_ATANL)
 373     AC_DEFINE(HAVE_CEILL)
 374     AC_DEFINE(HAVE_COPYSIGNL)
 375     AC_DEFINE(HAVE_COSL)
 376     AC_DEFINE(HAVE_COSHL)
 377     AC_DEFINE(HAVE_EXPL)
 378     AC_DEFINE(HAVE_FABSL)
 379     AC_DEFINE(HAVE_FLOORL)
 380     AC_DEFINE(HAVE_FMODL)
 381     AC_DEFINE(HAVE_FREXPL)
 382     AC_DEFINE(HAVE_LDEXPL)
 383     AC_DEFINE(HAVE_LOG10L)
 384     AC_DEFINE(HAVE_LOGL)
 385     AC_DEFINE(HAVE_MODFL)
 386     AC_DEFINE(HAVE_POWL)
 387     AC_DEFINE(HAVE_SINCOSL)
 388     AC_DEFINE(HAVE_SINL)
 389     AC_DEFINE(HAVE_SINHL)
 390     AC_DEFINE(HAVE_SQRTL)
 391     AC_DEFINE(HAVE_TANL)
 392     AC_DEFINE(HAVE_TANHL)
 393   fi
 394
 395 else
 396
 397   # We are being configured natively. We can do more elaborate tests
 398   # that include AC_TRY_COMPILE now, as the linker is assumed to be
 399   # working.
 400   GLIBCPP_IS_CROSS_COMPILING=0
 401   CANADIAN=no
 402
 403   # Check for available headers.
 404   AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \
 405   machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h sys/types.h])
 406
 407   GLIBCPP_CHECK_COMPILER_FEATURES
 408   GLIBCPP_CHECK_LINKER_FEATURES
 409   GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
 410   GLIBCPP_CHECK_MATH_SUPPORT
 411   GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 412   GLIBCPP_CHECK_WCHAR_T_SUPPORT
 413   GLIBCPP_CHECK_STDLIB_SUPPORT
 414   AC_LC_MESSAGES
 415
 416   AC_TRY_COMPILE([
 417   #include <setjmp.h>
 418   ], [sigjmp_buf env; while (! sigsetjmp (env, 1)) siglongjmp (env, 1);],
 419   [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available.  ])
 420   ])
 421
 422   AC_FUNC_MMAP
 423
 424   # Establish limits on memory usage during 'make check'
 425   GLIBCPP_CONFIGURE_TESTSUITE
 426 fi
 427
 428 # This depends on the possibly-skipped linker test above.
 429 GLIBCPP_ENABLE_SYMVERS([yes])
 430
 431 # Propagate the target-specific source directories through the build chain.
 432 # (Nothing currently uses cpu_include_dir directly; only ATOMICITYH
 433 # uses it, and it only gets used in this file.)
 434 OS_INC_SRCDIR=config/${os_include_dir}
 435 ATOMICITY_INC_SRCDIR=config/${ATOMICITYH}
 436 AC_SUBST(OS_INC_SRCDIR)
 437 AC_SUBST(ATOMICITY_INC_SRCDIR)
 438
 439 # Set up cross-compile flags
 440 AC_SUBST(GLIBCPP_IS_CROSS_COMPILING)  dnl Unused so far.
 441 AM_CONDITIONAL(CANADIAN, test "$CANADIAN" = yes)
 442
 443 AC_CACHE_SAVE
 444
 445 if test "${multilib}" = "yes"; then
 446   multilib_arg="--enable-multilib"
 447 else
 448   multilib_arg=
 449 fi
 450
 451 # Export all the install information
 452 GLIBCPP_EXPORT_INSTALL_INFO
 453
 454 # Export all the include and flag information to Makefiles.
 455 GLIBCPP_EXPORT_INCLUDES
 456 GLIBCPP_EXPORT_FLAGS
 457
 458 if ${CONFIG_SHELL-/bin/sh} ./libtool --tag CXX --features |
 459    grep "enable shared" > /dev/null; then
 460   LIBSUPCXX_PICFLAGS=-prefer-pic
 461 else
 462   LIBSUPCXX_PICFLAGS=
 463 fi
 464 AC_SUBST(LIBSUPCXX_PICFLAGS)
 465
 466 # Generate the various Makefiles, include files, and scripts.
 467 # NB: Multilibs need MULTISUBDIR defined correctly in src/Makefile.am
 468 # and libsupc++/Makefile.am so that multilib installs will end up
 469 # installed in the correct place. To work around this not being passed
 470 # down from config-ml.in -> top_srcdir/Makefile.am ->
 471 # top_srcdir/{src,libsupc++}/Makefile.am, manually append it here.
 472 AC_OUTPUT(Makefile \
 473 include/Makefile src/Makefile \
 474 libmath/Makefile libio/Makefile libsupc++/Makefile \
 475 po/Makefile testsuite/Makefile mkcheck testsuite_flags,
 476 [test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
 477  if test -n "$CONFIG_FILES"; then
 478    if test -n "${with_build_subdir}" || test -n "${with_target_subdir}"; then
 479      LD="${ORIGINAL_LD_FOR_MULTILIBS}"
 480      # Ony modify Makefiles that are just being created.
 481      case " $CONFIG_FILES" in
 482        *" Makefile"*)
 483          ac_file=Makefile . ${glibcpp_basedir}/../config-ml.in
 484          ;;
 485      esac
 486      case $CONFIG_FILES in
 487        *src/Makefile*)
 488          grep '^MULTISUBDIR =' Makefile >> src/Makefile
 489          ;;
 490      esac
 491      case $CONFIG_FILES in
 492        *libsupc++/Makefile*)
 493          grep '^MULTISUBDIR =' Makefile >> libsupc++/Makefile
 494          ;;
 495      esac
 496    fi
 497  fi
 498  chmod +x mkcheck
 499  chmod +x testsuite_flags],
 500 srcdir=${srcdir}
 501 host=${host}
 502 target=${target}
 503 with_target_subdir=${with_target_subdir}
 504 with_build_subdir=${with_build_subdir}
 505 with_multisubdir=${with_multisubdir}
 506 ac_configure_args="${multilib_arg} ${ac_configure_args}"
 507 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 508 glibcpp_basedir=${glibcpp_basedir}
 509 CC="${CC}"
 510 CXX="${CXX}"
 511 ORIGINAL_LD_FOR_MULTILIBS="${ORIGINAL_LD_FOR_MULTILIBS}"
 512 )
 513 dnl  In autoconf 2.5x, AC_OUTPUT is replaced by three AC_ macros:
 514 dnl  AC_CONFIG_FILES(Makefile \
 515 dnl      include/Makefile src/Makefile \
 516 dnl      libmath/Makefile libio/Makefile libsupc++/Makefile \
 517 dnl      po/Makefile testsuite/Makefile mkcheck testsuite_flags)
 518 dnl  AC_CONFIG_COMMANDS([default],
 519 dnl  [if test -n "$CONFIG_FILES"; then
 520 dnl    # Ony modify Makefiles that are just being created.
 521 dnl    case " $CONFIG_FILES" in
 522 dnl      *" Makefile"*)
 523 dnl        ac_file=Makefile . ${glibcpp_basedir}/../config-ml.in
 524 dnl        ;;
 525 dnl    esac
 526 dnl    case $CONFIG_FILES in
 527 dnl      *src/Makefile*)
 528 dnl        grep '^MULTISUBDIR =' Makefile >> src/Makefile
 529 dnl        ;;
 530 dnl    esac
 531 dnl    case $CONFIG_FILES in
 532 dnl      *libsupc++/Makefile*)
 533 dnl        grep '^MULTISUBDIR =' Makefile >> libsupc++/Makefile
 534 dnl        ;;
 535 dnl    esac
 536 dnl  fi
 537 dnl  chmod +x mkcheck
 538 dnl  chmod +x testsuite_flags
 539 dnl  ],
 540 dnl  srcdir=${srcdir}
 541 dnl  host=${host}
 542 dnl  target=${target}
 543 dnl  with_multisubdir=${with_multisubdir}
 544 dnl  ac_configure_args="${multilib_arg} ${ac_configure_args}"
 545 dnl  CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 546 dnl  glibcpp_basedir=${glibcpp_basedir}
 547 dnl  CC="${CC}"
 548 dnl  CXX="${CXX}"
 549 dnl  )
 550 dnl  AC_OUTPUT
 551
 552
 553 # Sanity checking & User-visible messages.
 554 # Checks down here, otherwise they get scrolled off before
 555 # the user will notice.
 556
 557 # Trying to get more people to read documentation.  Possibly remove
 558 # check and warn all the time. There is no "informational" AC_MSG_
 559 # macro, so these are going to be printed even when --quiet/--silent
 560 # is given.
 561 if test ! -f stamp-sanity-warned; then
 562   touch stamp-sanity-warned
 563   echo ""
 564   echo "Please make certain that you read the installation information here:"
 565   echo "  faster => ${srcdir}/docs/html/install.html"
 566   echo "  slower => <URL:http://gcc.gnu.org/onlinedocs/libstdc++/install.html>"
 567   echo ""
 568   echo "and the configuration information here:"
 569   echo "  faster => ${srcdir}/docs/html/configopts.html"
 570   echo "  slower => <URL:http://gcc.gnu.org/onlinedocs/libstdc++/configopts.html>"
 571   echo ""
 572   echo "before proceeding with ${_cv_gnu_make_command}."
 573   echo ""
 574 fi