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# Process this file with autoreconf to produce a configure script.

AC_PREREQ(2.64)

AC_INIT(package-unused, version-unused,, libstdc++)

AC_CONFIG_SRCDIR(src/ios.cc)

AC_CONFIG_HEADER(config.h)

# This works around the fact that libtool configuration may change LD

# for this particular configuration, but some shells, instead of

# keeping the changes in LD private, export them just because LD is

# exported.  Only used at the end of this file.

### am handles this now?  ORIGINAL_LD_FOR_MULTILIBS=$LD

# For libtool versioning info, format is CURRENT:REVISION:AGE

libtool_VERSION=6:14:0

AC_SUBST(libtool_VERSION)

# Find the rest of the source tree framework.

AM_ENABLE_MULTILIB(, ..)

# Gets build, host, target, *_vendor, *_cpu, *_os, etc.

#

# You will slowly go insane if you do not grok the following fact:  when

# building v3 as part of the compiler, the top-level /target/ becomes the

# library's /host/.  configure then causes --target to default to --host,

# exactly like any other package using autoconf.  Therefore, 'target' and

# 'host' will always be the same.  This makes sense both for native and

# cross compilers, just think about it for a little while.  :-)

#

# Also, if v3 is being configured as part of a cross compiler, the top-level

# configure script will pass the "real" host as $with_cross_host.

#

# Do not delete or change the following two lines.  For why, see

# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html

AC_CANONICAL_SYSTEM

target_alias=${target_alias-$host_alias}

# Handy for debugging:

#AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5

if test "$build" != "$host"; then

  # We are being configured with some form of cross compiler.

  GLIBCXX_IS_NATIVE=false

  case "$host","$target" in

    # Darwin crosses can use the host system's libraries and headers,

    # because of the fat library support.  Of course, it must be the

    # same version of Darwin on both sides.  Allow the user to

    # just say --target=foo-darwin without a version number to mean

    # "the version on this system".

      *-*-darwin*,*-*-darwin*)

        hostos=`echo $host | sed 's/.*-darwin/darwin/'`

        targetos=`echo $target | sed 's/.*-darwin/darwin/'`

        if test $hostos = $targetos -o $targetos = darwin ; then

          GLIBCXX_IS_NATIVE=true

        fi

        ;;

      *)

        GCC_NO_EXECUTABLES

        ;;

  esac

else

  GLIBCXX_IS_NATIVE=true

fi

# Sets up automake.  Must come after AC_CANONICAL_SYSTEM.  Each of the

# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.

#  1.x:  minimum required version

#  no-define:  PACKAGE and VERSION will not be #define'd in config.h (a bunch

#              of other PACKAGE_* variables will, however, and there's nothing

#              we can do about that; they come from AC_INIT).

#  foreign:  we don't follow the normal rules for GNU packages (no COPYING

#            file in the top srcdir, etc, etc), so stop complaining.

#  no-dependencies:  turns off auto dependency generation (just for now)

#  -Wall:  turns on all automake warnings...

#  -Wno-portability:  ...except this one, since GNU make is now required.

AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies -Wall -Wno-portability -Wno-override])

AH_TEMPLATE(PACKAGE, [Name of package])

AH_TEMPLATE(VERSION, [Version number of package])

# -fno-builtin must be present here so that a non-conflicting form of

# std::exit can be guessed by AC_PROG_CXX, and used in later tests.

save_CXXFLAGS="$CXXFLAGS"

CXXFLAGS="$CXXFLAGS -fno-builtin"

AC_PROG_CC

AC_PROG_CXX

CXXFLAGS="$save_CXXFLAGS"

# Runs configure.host, and assorted other critical bits.  Sets

# up critical shell variables.

GLIBCXX_CONFIGURE

if test "x${with_newlib}" != "xyes"; then

  AC_LIBTOOL_DLOPEN

fi

AM_PROG_LIBTOOL

AC_SUBST(enable_shared)

AC_SUBST(enable_static)

# Eliminate -lstdc++ addition to postdeps for cross compiles.

postdeps_CXX=`echo " $postdeps_CXX " | sed 's, -lstdc++ ,,g'`

# Possibly disable most of the library.

## TODO: Consider skipping unncessary tests altogether in this case, rather

## than just ignoring the results.  Faster /and/ more correct, win win.

GLIBCXX_ENABLE_HOSTED

# Enable compiler support that doesn't require linking.

GLIBCXX_ENABLE_SJLJ_EXCEPTIONS

GLIBCXX_ENABLE_PCH($is_hosted)

GLIBCXX_ENABLE_THREADS

GLIBCXX_ENABLE_ATOMIC_BUILTINS

GLIBCXX_ENABLE_DECIMAL_FLOAT

# Checks for compiler support that doesn't require linking.

GLIBCXX_CHECK_COMPILER_FEATURES

# Enable all the variable C++ runtime options that don't require linking.

GLIBCXX_ENABLE_CSTDIO

GLIBCXX_ENABLE_CLOCALE

GLIBCXX_ENABLE_ALLOCATOR

GLIBCXX_ENABLE_CHEADERS($c_model)  dnl c_model from configure.host

GLIBCXX_ENABLE_LONG_LONG([yes])

GLIBCXX_ENABLE_WCHAR_T([yes])

GLIBCXX_ENABLE_C99([yes])

GLIBCXX_ENABLE_CONCEPT_CHECKS([no])

GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"])

GLIBCXX_ENABLE_DEBUG([no])

GLIBCXX_ENABLE_PARALLEL([yes])

GLIBCXX_ENABLE_CXX_FLAGS

GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])

# Checks for operating systems support that doesn't require linking.

GLIBCXX_CHECK_SYSTEM_ERROR

# For the streamoff typedef.

GLIBCXX_CHECK_INT64_T

# For LFS support.

GLIBCXX_CHECK_LFS

# For showmanyc_helper().

AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)

GLIBCXX_CHECK_POLL

GLIBCXX_CHECK_S_ISREG_OR_S_IFREG

# For xsputn_2().

AC_CHECK_HEADERS(sys/uio.h)

GLIBCXX_CHECK_WRITEV

# For C99 support to TR1.

GLIBCXX_CHECK_C99_TR1

# For common values of EOF, SEEK_CUR, SEEK_END.

GLIBCXX_CHECK_STDIO_MACROS

# For gettimeofday support.

GLIBCXX_CHECK_GETTIMEOFDAY

# For clock_gettime, nanosleep and sched_yield support.

# NB: The default is [no], because otherwise it requires linking.

GLIBCXX_ENABLE_LIBSTDCXX_TIME([no])

# For gthread support

GLIBCXX_CHECK_GTHREADS

AC_LC_MESSAGES

# Check for available headers.

AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \

locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \

strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \

sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \

wchar.h wctype.h])

# Only do link tests if native. Else, hardcode.

if $GLIBCXX_IS_NATIVE; then

  # We can do more elaborate tests that assume a working linker.

  CANADIAN=no

  GLIBCXX_CHECK_LINKER_FEATURES

  GLIBCXX_CHECK_MATH_SUPPORT

  GLIBCXX_CHECK_STDLIB_SUPPORT

  # For /dev/random and /dev/urandom for TR1.

  GLIBCXX_CHECK_RANDOM_TR1

  # For TLS support.

  GCC_CHECK_TLS

  # For iconv support.

  AM_ICONV

else

  # This lets us hard-code the functionality we know we'll have in the cross

  # target environment.  "Let" is a sugar-coated word placed on an especially

  # dull and tedious hack, actually.

  #

  # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros

  # that involve linking, can't be used:

  #    "cannot open sim-crt0.o"

  #    "cannot open crt0.o"

  # etc.  All this is because there currently exists no unified, consistent

  # way for top level CC information to be passed down to target directories:

  # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.

  # When all of that is done, all of this hokey, excessive AC_DEFINE junk for

  # crosses can be removed.

  # If Canadian cross, then don't pick up tools from the build directory.

  # Used only in GLIBCXX_EXPORT_INCLUDES.

  if test -n "$with_cross_host" &&

     test x"$build_alias" != x"$with_cross_host" &&

     test x"$build" != x"$target";

  then

    CANADIAN=yes

  else

    CANADIAN=no

  fi

  # Construct crosses by hand, eliminating bits that need ld...

  # GLIBCXX_CHECK_MATH_SUPPORT

  # First, test for "known" system libraries.  We may be using newlib even

  # on a hosted environment.

  if test "x${with_newlib}" = "xyes"; then

    os_include_dir="os/newlib"

    AC_DEFINE(HAVE_HYPOT)

    # GLIBCXX_CHECK_STDLIB_SUPPORT

    AC_DEFINE(HAVE_STRTOF)

    AC_DEFINE(HAVE_ACOSF)

    AC_DEFINE(HAVE_ASINF)

    AC_DEFINE(HAVE_ATAN2F)

    AC_DEFINE(HAVE_ATANF)

    AC_DEFINE(HAVE_CEILF)

    AC_DEFINE(HAVE_COSF)

    AC_DEFINE(HAVE_COSHF)

    AC_DEFINE(HAVE_EXPF)

    AC_DEFINE(HAVE_FABSF)

    AC_DEFINE(HAVE_FLOORF)

    AC_DEFINE(HAVE_FMODF)

    AC_DEFINE(HAVE_FREXPF)

    AC_DEFINE(HAVE_LDEXPF)

    AC_DEFINE(HAVE_LOG10F)

    AC_DEFINE(HAVE_LOGF)

    AC_DEFINE(HAVE_MODFF)

    AC_DEFINE(HAVE_POWF)

    AC_DEFINE(HAVE_SINF)

    AC_DEFINE(HAVE_SINHF)

    AC_DEFINE(HAVE_SQRTF)

    AC_DEFINE(HAVE_TANF)

    AC_DEFINE(HAVE_TANHF)

    AC_DEFINE(HAVE_ICONV)

  else

    GLIBCXX_CROSSCONFIG

  fi

  # At some point, we should differentiate between architectures

  # like x86, which have long double versions, and alpha/powerpc/etc.,

  # which don't. For the time being, punt.

  if test x"long_double_math_on_this_cpu" = x"yes"; then

    AC_DEFINE(HAVE_ACOSL)

    AC_DEFINE(HAVE_ASINL)

    AC_DEFINE(HAVE_ATAN2L)

    AC_DEFINE(HAVE_ATANL)

    AC_DEFINE(HAVE_CEILL)

    AC_DEFINE(HAVE_COSL)

    AC_DEFINE(HAVE_COSHL)

    AC_DEFINE(HAVE_EXPL)

    AC_DEFINE(HAVE_FABSL)

    AC_DEFINE(HAVE_FLOORL)

    AC_DEFINE(HAVE_FMODL)

    AC_DEFINE(HAVE_FREXPL)

    AC_DEFINE(HAVE_LDEXPL)

    AC_DEFINE(HAVE_LOG10L)

    AC_DEFINE(HAVE_LOGL)

    AC_DEFINE(HAVE_MODFL)

    AC_DEFINE(HAVE_POWL)

    AC_DEFINE(HAVE_SINCOSL)

    AC_DEFINE(HAVE_SINL)

    AC_DEFINE(HAVE_SINHL)

    AC_DEFINE(HAVE_SQRTL)

    AC_DEFINE(HAVE_TANL)

    AC_DEFINE(HAVE_TANHL)

  fi

fi

# Check for _Unwind_GetIPInfo.

GCC_CHECK_UNWIND_GETIPINFO

GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])])

GCC_HEADER_STDINT(include/gstdint.h)

# This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.

GLIBCXX_ENABLE_SYMVERS([yes])

GLIBCXX_ENABLE_VISIBILITY([yes])

ac_ldbl_compat=no

case "$target" in

  powerpc*-*-linux* | \

  powerpc*-*-gnu* | \

  sparc*-*-linux* | \

  s390*-*-linux* | \

  alpha*-*-linux*)

  AC_TRY_COMPILE(, [

#if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__))

#error no need for long double compatibility

#endif

  ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no])

  if test "$ac_ldbl_compat" = yes; then

    AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1,

              [Define if compatibility should be provided for -mlong-double-64.])

    port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"

  fi

esac

GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes)

# This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.

GLIBCXX_CONFIGURE_TESTSUITE

# Propagate the target-specific source directories through the build chain.

ATOMICITY_SRCDIR=config/${atomicity_dir}

ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}

ATOMIC_FLAGS=${atomic_flags}

CPU_DEFINES_SRCDIR=config/${cpu_defines_dir}

OS_INC_SRCDIR=config/${os_include_dir}

ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir}

ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}

AC_SUBST(ATOMICITY_SRCDIR)

AC_SUBST(ATOMIC_WORD_SRCDIR)

AC_SUBST(ATOMIC_FLAGS)

AC_SUBST(CPU_DEFINES_SRCDIR)

AC_SUBST(ABI_TWEAKS_SRCDIR)

AC_SUBST(OS_INC_SRCDIR)

AC_SUBST(ERROR_CONSTANTS_SRCDIR)

# Determine cross-compile flags and AM_CONDITIONALs.

#AC_SUBST(GLIBCXX_IS_NATIVE)

#AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)

GLIBCXX_EVALUATE_CONDITIONALS

AC_CACHE_SAVE

if test ${multilib} = yes; then

  multilib_arg="--enable-multilib"

else

  multilib_arg=

fi

# Export all the install information.

GLIBCXX_EXPORT_INSTALL_INFO

# Export all the include and flag information to Makefiles.

GLIBCXX_EXPORT_INCLUDES

GLIBCXX_EXPORT_FLAGS

if test "$enable_shared" = yes; then

  LIBSUPCXX_PICFLAGS="-prefer-pic"

else

  LIBSUPCXX_PICFLAGS=

fi

AC_SUBST(LIBSUPCXX_PICFLAGS)

dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,

dnl which can all be called multiple times as needed, plus one (different)

dnl AC_OUTPUT macro.  This one lists the files to be created:

AC_CONFIG_FILES(Makefile)

AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])

# Multilibs need MULTISUBDIR defined correctly in certain makefiles so

# that multilib installs will end up installed in the correct place.

# The testsuite needs it for multilib-aware ABI baseline files.

# To work around this not being passed down from config-ml.in ->

# srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually

# append it here.  Only modify Makefiles that have just been created.

#

# Also, get rid of this simulated-VPATH thing that automake does.

AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),

  [cat > vpsed$$ << \_EOF

s!`test -f '$<' || echo '$(srcdir)/'`!!

_EOF

   sed -f vpsed$$ $ac_file > tmp$$

   mv tmp$$ $ac_file

   rm vpsed$$

   echo 'MULTISUBDIR =' >> $ac_file

   ml_norecursion=yes

   . ${multi_basedir}/config-ml.in

   AS_UNSET([ml_norecursion])

])

AC_CONFIG_COMMANDS([generate-headers],

  [(cd include && ${MAKE-make} pch_build= )])

dnl And this actually makes things happen:

AC_OUTPUT