[thirdparty/gcc.git] / libstdc++-v3 / configure.ac

# 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/shared/hashtable-aux.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

# 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)
#  no-dist:  we don't want 'dist' and related rules.
#  -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 no-dist -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
ACX_LT_HOST_FLAGS
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
GLIBCXX_ENABLE_INT128_FLOAT128

# 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(["-gdwarf-4 -g3 -O0"])
GLIBCXX_ENABLE_DEBUG([no])
GLIBCXX_ENABLE_PARALLEL([yes])
GLIBCXX_ENABLE_CXX_FLAGS
GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
GLIBCXX_ENABLE_EXTERN_TEMPLATE([yes])
GLIBCXX_ENABLE_PYTHON

# Checks for operating systems support that doesn't require linking.
GLIBCXX_CHECK_MATH_PROTO
GLIBCXX_CHECK_STDLIB_PROTO
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 the EOF, SEEK_CUR, and SEEK_END integer constants.
GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS

# 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

# For hardware_concurrency
AC_CHECK_HEADERS(sys/sysinfo.h)
GLIBCXX_CHECK_GET_NPROCS
AC_CHECK_HEADERS(unistd.h)
GLIBCXX_CHECK_SC_NPROCESSORS_ONLN
GLIBCXX_CHECK_SC_NPROC_ONLN
GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP
GLIBCXX_CHECK_SYSCTL_HW_NCPU

# 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)

GLIBCXX_ENABLE_SYMVERS([yes])
AC_SUBST(libtool_VERSION)

GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY([yes])

ac_ldbl_compat=no
case "$target" in
  powerpc*-*-linux* | \
  sparc*-*-linux* | \
  s390*-*-linux* | \
  alpha*-*-linux*)
  AC_TRY_COMPILE(, [
#if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__))
#error no need for long double compatibility
#endif
  ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no])
  if test "$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

# Define documentation rules conditionally.

# See if makeinfo has been installed and is modern enough
# that we can use it.
ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
		   [GNU texinfo.* \([0-9][0-9.]*\)],
		   [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")

# Check for doxygen
AC_CHECK_PROG([DOXYGEN], doxygen, yes, no)
AC_CHECK_PROG([DOT], dot, yes, no)

# Check for docbook
AC_CHECK_PROG([XSLTPROC], xsltproc, yes, no)
AC_CHECK_PROG([XMLLINT], xmllint, yes, no)
GLIBCXX_CONFIGURE_DOCBOOK

# Check for xml/html dependencies.
AM_CONDITIONAL(BUILD_XML,
	       test $ac_cv_prog_DOXYGEN = "yes" &&
	       test $ac_cv_prog_DOT = "yes" &&
	       test $ac_cv_prog_XSLTPROC = "yes" &&
	       test $ac_cv_prog_XMLLINT = "yes" &&
	       test $glibcxx_stylesheets = "yes")

AM_CONDITIONAL(BUILD_HTML,
	       test $ac_cv_prog_DOXYGEN = "yes" &&
	       test $ac_cv_prog_DOT = "yes" &&
	       test $ac_cv_prog_XSLTPROC = "yes" &&
	       test $ac_cv_prog_XMLLINT = "yes" &&
	       test $glibcxx_stylesheets = "yes")

# Check for man dependencies.
AM_CONDITIONAL(BUILD_MAN,
	       test $ac_cv_prog_DOXYGEN = "yes" &&
	       test $ac_cv_prog_DOT = "yes")

# Check for pdf dependencies.
AC_CHECK_PROG([DBLATEX], dblatex, yes, no)
AC_CHECK_PROG([PDFLATEX], pdflatex, yes, no)
AM_CONDITIONAL(BUILD_PDF,
	       test $ac_cv_prog_DBLATEX = "yes" &&
	       test $ac_cv_prog_PDFLATEX = "yes")


# 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
  PIC_CXXFLAGS="-prefer-pic"
else
  PIC_CXXFLAGS=
fi
AC_SUBST(PIC_CXXFLAGS)

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

# 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
Commit	Line	Data
3a24bf5d	1	# Process this file with autoreconf to produce a configure script.
b2dad0e3	2
df58e648	3	AC_PREREQ(2.64)
fbe057bb	4	AC_INIT(package-unused, version-unused,, libstdc++)
8bae34da	5	AC_CONFIG_SRCDIR(src/shared/hashtable-aux.cc)
ff66d28f	6	AC_CONFIG_HEADER(config.h)
e2c20fae	7
6706f116 AO	8	# This works around the fact that libtool configuration may change LD
	9	# for this particular configuration, but some shells, instead of
	10	# keeping the changes in LD private, export them just because LD is
2c839a4e	11	# exported. Only used at the end of this file.
ff66d28f	12	### am handles this now? ORIGINAL_LD_FOR_MULTILIBS=$LD
6706f116	13
ff66d28f	14	# Find the rest of the source tree framework.
076e5443	15	AM_ENABLE_MULTILIB(, ..)
aebb8c22	16
58b08ac3	17	# Gets build, host, target, _vendor, _cpu, *_os, etc.
2c839a4e PE	18	#
	19	# You will slowly go insane if you do not grok the following fact: when
	20	# building v3 as part of the compiler, the top-level /target/ becomes the
ff66d28f	21	# library's /host/. configure then causes --target to default to --host,
2c839a4e PE	22	# exactly like any other package using autoconf. Therefore, 'target' and
	23	# 'host' will always be the same. This makes sense both for native and
	24	# cross compilers, just think about it for a little while. :-)
	25	#
	26	# Also, if v3 is being configured as part of a cross compiler, the top-level
	27	# configure script will pass the "real" host as $with_cross_host.
	28	#
ff66d28f PE	29	# Do not delete or change the following two lines. For why, see
ff66d28f PE	30	# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
b2dad0e3	31	AC_CANONICAL_SYSTEM
ff66d28f PE	32	target_alias=${target_alias-$host_alias}
	33
	34	# Handy for debugging:
	35	#AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5
	36
0df3f383 PE	37	if test "$build" != "$host"; then
	38	# We are being configured with some form of cross compiler.
	39	GLIBCXX_IS_NATIVE=false
0646b059 GK	40	case "$host","$target" in
	41	# Darwin crosses can use the host system's libraries and headers,
	42	# because of the fat library support. Of course, it must be the
	43	# same version of Darwin on both sides. Allow the user to
	44	# just say --target=foo-darwin without a version number to mean
	45	# "the version on this system".
	46	--darwin,--darwin)
	47	hostos=`echo $host \| sed 's/.*-darwin/darwin/'`
	48	targetos=`echo $target \| sed 's/.*-darwin/darwin/'`
	49	if test $hostos = $targetos -o $targetos = darwin ; then
	50	GLIBCXX_IS_NATIVE=true
	51	fi
	52	;;
	53
	54	*)
	55	GCC_NO_EXECUTABLES
	56	;;
	57	esac
0df3f383 PE	58	else
	59	GLIBCXX_IS_NATIVE=true
	60	fi
	61
ff66d28f PE	62	# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
	63	# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
	64	# 1.x: minimum required version
	65	# no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
	66	# of other PACKAGE_* variables will, however, and there's nothing
fbe057bb	67	# we can do about that; they come from AC_INIT).
ff66d28f PE	68	# foreign: we don't follow the normal rules for GNU packages (no COPYING
	69	# file in the top srcdir, etc, etc), so stop complaining.
	70	# no-dependencies: turns off auto dependency generation (just for now)
13917ae3	71	# no-dist: we don't want 'dist' and related rules.
2d52e9e3 PE	72	# -Wall: turns on all automake warnings...
2d52e9e3 PE	73	# -Wno-portability: ...except this one, since GNU make is now required.
13917ae3	74	AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies no-dist -Wall -Wno-portability -Wno-override])
3a24bf5d KC	75	AH_TEMPLATE(PACKAGE, [Name of package])
3a24bf5d KC	76	AH_TEMPLATE(VERSION, [Version number of package])
ff66d28f	77
ae66da3b RW	78	# -fno-builtin must be present here so that a non-conflicting form of
	79	# std::exit can be guessed by AC_PROG_CXX, and used in later tests.
	80
ae66da3b RW	81	save_CXXFLAGS="$CXXFLAGS"
	82	CXXFLAGS="$CXXFLAGS -fno-builtin"
	83	AC_PROG_CC
	84	AC_PROG_CXX
	85	CXXFLAGS="$save_CXXFLAGS"
ae66da3b RW	86
ae66da3b RW	87	# Runs configure.host, and assorted other critical bits. Sets
ff66d28f PE	88	# up critical shell variables.
	89	GLIBCXX_CONFIGURE
	90
be95b355 BS	91	if test "x${with_newlib}" != "xyes"; then
	92	AC_LIBTOOL_DLOPEN
	93	fi
5780a46b	94	AM_PROG_LIBTOOL
7de6ba7a	95	ACX_LT_HOST_FLAGS
34791641 PE	96	AC_SUBST(enable_shared)
34791641 PE	97	AC_SUBST(enable_static)
04e78786	98
a6918ffd RW	99	# Eliminate -lstdc++ addition to postdeps for cross compiles.
	100	postdeps_CXX=`echo " $postdeps_CXX " \| sed 's, -lstdc++ ,,g'`
	101
92eabea2	102	# Possibly disable most of the library.
347669a0	103	## TODO: Consider skipping unncessary tests altogether in this case, rather
92eabea2 PE	104	## than just ignoring the results. Faster /and/ more correct, win win.
	105	GLIBCXX_ENABLE_HOSTED
	106
0646d8a3	107	# Enable compiler support that doesn't require linking.
3d7c150e	108	GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
92eabea2	109	GLIBCXX_ENABLE_PCH($is_hosted)
e55d0e35	110	GLIBCXX_ENABLE_THREADS
f958e3ca	111	GLIBCXX_ENABLE_ATOMIC_BUILTINS
4cdc8761	112	GLIBCXX_ENABLE_DECIMAL_FLOAT
6d585f01	113	GLIBCXX_ENABLE_INT128_FLOAT128
e55d0e35	114
b8c41c8e	115	# Checks for compiler support that doesn't require linking.
e55d0e35	116	GLIBCXX_CHECK_COMPILER_FEATURES
b2dad0e3	117
1894e4c5	118	# Enable all the variable C++ runtime options that don't require linking.
3d7c150e BK	119	GLIBCXX_ENABLE_CSTDIO
3d7c150e BK	120	GLIBCXX_ENABLE_CLOCALE
8b0d6051	121	GLIBCXX_ENABLE_ALLOCATOR
ff66d28f	122	GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
3d7c150e	123	GLIBCXX_ENABLE_LONG_LONG([yes])
347669a0	124	GLIBCXX_ENABLE_WCHAR_T([yes])
8a9b2875	125	GLIBCXX_ENABLE_C99([yes])
ff66d28f	126	GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
56378d0e	127	GLIBCXX_ENABLE_DEBUG_FLAGS(["-gdwarf-4 -g3 -O0"])
3d7c150e	128	GLIBCXX_ENABLE_DEBUG([no])
6995087d	129	GLIBCXX_ENABLE_PARALLEL([yes])
ff66d28f	130	GLIBCXX_ENABLE_CXX_FLAGS
1165dc50	131	GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
ed4f96af	132	GLIBCXX_ENABLE_EXTERN_TEMPLATE([yes])
2a5d011c	133	GLIBCXX_ENABLE_PYTHON
b2dad0e3	134
b8c41c8e	135	# Checks for operating systems support that doesn't require linking.
09fae88d RO	136	GLIBCXX_CHECK_MATH_PROTO
09fae88d RO	137	GLIBCXX_CHECK_STDLIB_PROTO
0646d8a3	138	GLIBCXX_CHECK_SYSTEM_ERROR
974e336b	139
0f24e8de PC	140	# For the streamoff typedef.
	141	GLIBCXX_CHECK_INT64_T
	142
74745ec5 PC	143	# For LFS support.
	144	GLIBCXX_CHECK_LFS
	145
	146	# For showmanyc_helper().
	147	AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
	148	GLIBCXX_CHECK_POLL
	149	GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
	150
	151	# For xsputn_2().
	152	AC_CHECK_HEADERS(sys/uio.h)
	153	GLIBCXX_CHECK_WRITEV
	154
0f24e8de PC	155	# For C99 support to TR1.
	156	GLIBCXX_CHECK_C99_TR1
	157
ddc9c40d PC	158	# For the EOF, SEEK_CUR, and SEEK_END integer constants.
ddc9c40d PC	159	GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS
974e336b	160
610870b2 PC	161	# For gettimeofday support.
	162	GLIBCXX_CHECK_GETTIMEOFDAY
	163
959d14e1	164	# For clock_gettime, nanosleep and sched_yield support.
610870b2	165	# NB: The default is [no], because otherwise it requires linking.
959d14e1	166	GLIBCXX_ENABLE_LIBSTDCXX_TIME([no])
610870b2	167
b8c41c8e CF	168	# For gthread support
	169	GLIBCXX_CHECK_GTHREADS
	170
99bf8d16 PC	171	AC_LC_MESSAGES
99bf8d16 PC	172
43653c33 JW	173	# For hardware_concurrency
	174	AC_CHECK_HEADERS(sys/sysinfo.h)
	175	GLIBCXX_CHECK_GET_NPROCS
	176	AC_CHECK_HEADERS(unistd.h)
	177	GLIBCXX_CHECK_SC_NPROCESSORS_ONLN
5ee360d0 JW	178	GLIBCXX_CHECK_SC_NPROC_ONLN
	179	GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP
	180	GLIBCXX_CHECK_SYSCTL_HW_NCPU
43653c33	181
74745ec5	182	# Check for available headers.
a1360f57 SR	183	AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \
a1360f57 SR	184	locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \
74745ec5 PC	185	strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \
	186	sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
	187	wchar.h wctype.h])
	188
6995087d	189	# Only do link tests if native. Else, hardcode.
0df3f383	190	if $GLIBCXX_IS_NATIVE; then
b2dad0e3	191
0df3f383 PE	192	# We can do more elaborate tests that assume a working linker.
	193	CANADIAN=no
	194
0df3f383 PE	195	GLIBCXX_CHECK_LINKER_FEATURES
0df3f383 PE	196	GLIBCXX_CHECK_MATH_SUPPORT
0df3f383 PE	197	GLIBCXX_CHECK_STDLIB_SUPPORT
0df3f383 PE	198
1894e4c5	199	# For /dev/random and /dev/urandom for TR1.
d8bc9819 PC	200	GLIBCXX_CHECK_RANDOM_TR1
d8bc9819 PC	201
cddfb1c7 BK	202	# For TLS support.
	203	GCC_CHECK_TLS
	204
5f34ed87 BK	205	# For iconv support.
	206	AM_ICONV
	207
0df3f383	208	else
eebc608e	209
2c839a4e PE	210	# This lets us hard-code the functionality we know we'll have in the cross
	211	# target environment. "Let" is a sugar-coated word placed on an especially
	212	# dull and tedious hack, actually.
	213	#
3d7c150e	214	# Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
2c839a4e PE	215	# that involve linking, can't be used:
	216	# "cannot open sim-crt0.o"
	217	# "cannot open crt0.o"
	218	# etc. All this is because there currently exists no unified, consistent
	219	# way for top level CC information to be passed down to target directories:
	220	# newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
	221	# When all of that is done, all of this hokey, excessive AC_DEFINE junk for
	222	# crosses can be removed.
	223
	224	# If Canadian cross, then don't pick up tools from the build directory.
0df3f383	225	# Used only in GLIBCXX_EXPORT_INCLUDES.
ff66d28f	226	if test -n "$with_cross_host" &&
f5cf58dd	227	test x"$build_alias" != x"$with_cross_host" &&
ff66d28f PE	228	test x"$build" != x"$target";
ff66d28f PE	229	then
b2dad0e3	230	CANADIAN=yes
b2dad0e3 BK	231	else
b2dad0e3 BK	232	CANADIAN=no
b2dad0e3 BK	233	fi
b2dad0e3 BK	234
75940b88	235	# Construct crosses by hand, eliminating bits that need ld...
3d7c150e	236	# GLIBCXX_CHECK_MATH_SUPPORT
75940b88	237
ff66d28f PE	238	# First, test for "known" system libraries. We may be using newlib even
	239	# on a hosted environment.
	240	if test "x${with_newlib}" = "xyes"; then
	241	os_include_dir="os/newlib"
	242	AC_DEFINE(HAVE_HYPOT)
	243
	244	# GLIBCXX_CHECK_STDLIB_SUPPORT
b25e6b79	245	AC_DEFINE(HAVE_STRTOF)
ff66d28f PE	246
	247	AC_DEFINE(HAVE_ACOSF)
	248	AC_DEFINE(HAVE_ASINF)
	249	AC_DEFINE(HAVE_ATAN2F)
	250	AC_DEFINE(HAVE_ATANF)
	251	AC_DEFINE(HAVE_CEILF)
ff66d28f PE	252	AC_DEFINE(HAVE_COSF)
	253	AC_DEFINE(HAVE_COSHF)
	254	AC_DEFINE(HAVE_EXPF)
	255	AC_DEFINE(HAVE_FABSF)
	256	AC_DEFINE(HAVE_FLOORF)
	257	AC_DEFINE(HAVE_FMODF)
	258	AC_DEFINE(HAVE_FREXPF)
	259	AC_DEFINE(HAVE_LDEXPF)
	260	AC_DEFINE(HAVE_LOG10F)
	261	AC_DEFINE(HAVE_LOGF)
	262	AC_DEFINE(HAVE_MODFF)
	263	AC_DEFINE(HAVE_POWF)
	264	AC_DEFINE(HAVE_SINF)
	265	AC_DEFINE(HAVE_SINHF)
	266	AC_DEFINE(HAVE_SQRTF)
	267	AC_DEFINE(HAVE_TANF)
	268	AC_DEFINE(HAVE_TANHF)
517da0ce	269
5f34ed87	270	AC_DEFINE(HAVE_ICONV)
ff66d28f	271	else
c41f82b2	272	GLIBCXX_CROSSCONFIG
ff66d28f	273	fi
75940b88 SE	274
	275	# At some point, we should differentiate between architectures
	276	# like x86, which have long double versions, and alpha/powerpc/etc.,
	277	# which don't. For the time being, punt.
	278	if test x"long_double_math_on_this_cpu" = x"yes"; then
	279	AC_DEFINE(HAVE_ACOSL)
	280	AC_DEFINE(HAVE_ASINL)
	281	AC_DEFINE(HAVE_ATAN2L)
	282	AC_DEFINE(HAVE_ATANL)
	283	AC_DEFINE(HAVE_CEILL)
75940b88 SE	284	AC_DEFINE(HAVE_COSL)
	285	AC_DEFINE(HAVE_COSHL)
	286	AC_DEFINE(HAVE_EXPL)
	287	AC_DEFINE(HAVE_FABSL)
75940b88 SE	288	AC_DEFINE(HAVE_FLOORL)
	289	AC_DEFINE(HAVE_FMODL)
	290	AC_DEFINE(HAVE_FREXPL)
75940b88 SE	291	AC_DEFINE(HAVE_LDEXPL)
	292	AC_DEFINE(HAVE_LOG10L)
	293	AC_DEFINE(HAVE_LOGL)
	294	AC_DEFINE(HAVE_MODFL)
	295	AC_DEFINE(HAVE_POWL)
	296	AC_DEFINE(HAVE_SINCOSL)
	297	AC_DEFINE(HAVE_SINL)
	298	AC_DEFINE(HAVE_SINHL)
	299	AC_DEFINE(HAVE_SQRTL)
	300	AC_DEFINE(HAVE_TANL)
	301	AC_DEFINE(HAVE_TANHL)
	302	fi
b2dad0e3 BK	303	fi
b2dad0e3 BK	304
bc3f0248 SE	305	# Check for _Unwind_GetIPInfo.
	306	GCC_CHECK_UNWIND_GETIPINFO
	307
0f3e711e JJ	308	GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])])
0f3e711e JJ	309
ed0840ba AT	310	GCC_HEADER_STDINT(include/gstdint.h)
ed0840ba AT	311
3d7c150e	312	GLIBCXX_ENABLE_SYMVERS([yes])
2799d972 BK	313	AC_SUBST(libtool_VERSION)
2799d972 BK	314
dbe17524	315	GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY([yes])
fe413112	316
6defecc2 JJ	317	ac_ldbl_compat=no
6defecc2 JJ	318	case "$target" in
f7cc5390	319	powerpc--linux* \| \
6defecc2 JJ	320	sparc--linux* \| \
	321	s390--linux* \| \
	322	alpha--linux*)
	323	AC_TRY_COMPILE(, [
	324	#if !defined __LONG_DOUBLE_128__ \|\| (defined(__sparc__) && defined(__arch64__))
	325	#error no need for long double compatibility
	326	#endif
	327	], [ac_ldbl_compat=yes], [ac_ldbl_compat=no])
	328	if test "$ac_ldbl_compat" = yes; then
	329	AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1,
	330	[Define if compatibility should be provided for -mlong-double-64.])
	331	port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"
	332	fi
	333	esac
	334	GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes)
	335
ff66d28f	336	# This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
3d7c150e	337	GLIBCXX_CONFIGURE_TESTSUITE
c4c064e7	338
b25e6b79 BK	339	# Define documentation rules conditionally.
	340
	341	# See if makeinfo has been installed and is modern enough
	342	# that we can use it.
	343	ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
	344	[GNU texinfo.* \([0-9][0-9.]*\)],
	345	[4.[4-9]\|4.[1-9][0-9]\|[5-9]\|[1-9][0-9]])
	346	AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
	347
	348	# Check for doxygen
	349	AC_CHECK_PROG([DOXYGEN], doxygen, yes, no)
	350	AC_CHECK_PROG([DOT], dot, yes, no)
	351
	352	# Check for docbook
	353	AC_CHECK_PROG([XSLTPROC], xsltproc, yes, no)
	354	AC_CHECK_PROG([XMLLINT], xmllint, yes, no)
b329dd10	355	GLIBCXX_CONFIGURE_DOCBOOK
b25e6b79 BK	356
	357	# Check for xml/html dependencies.
	358	AM_CONDITIONAL(BUILD_XML,
	359	test $ac_cv_prog_DOXYGEN = "yes" &&
	360	test $ac_cv_prog_DOT = "yes" &&
	361	test $ac_cv_prog_XSLTPROC = "yes" &&
	362	test $ac_cv_prog_XMLLINT = "yes" &&
	363	test $glibcxx_stylesheets = "yes")
	364
	365	AM_CONDITIONAL(BUILD_HTML,
	366	test $ac_cv_prog_DOXYGEN = "yes" &&
	367	test $ac_cv_prog_DOT = "yes" &&
	368	test $ac_cv_prog_XSLTPROC = "yes" &&
	369	test $ac_cv_prog_XMLLINT = "yes" &&
	370	test $glibcxx_stylesheets = "yes")
	371
	372	# Check for man dependencies.
	373	AM_CONDITIONAL(BUILD_MAN,
	374	test $ac_cv_prog_DOXYGEN = "yes" &&
	375	test $ac_cv_prog_DOT = "yes")
	376
43fe49ec	377	# Check for pdf dependencies.
b25e6b79 BK	378	AC_CHECK_PROG([DBLATEX], dblatex, yes, no)
	379	AC_CHECK_PROG([PDFLATEX], pdflatex, yes, no)
	380	AM_CONDITIONAL(BUILD_PDF,
	381	test $ac_cv_prog_DBLATEX = "yes" &&
	382	test $ac_cv_prog_PDFLATEX = "yes")
	383
b25e6b79	384
4a9d5109	385	# Propagate the target-specific source directories through the build chain.
2c5d0ae8 BK	386	ATOMICITY_SRCDIR=config/${atomicity_dir}
2c5d0ae8 BK	387	ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
c2ba9709	388	ATOMIC_FLAGS=${atomic_flags}
4b90c838	389	CPU_DEFINES_SRCDIR=config/${cpu_defines_dir}
cc5112c9	390	OS_INC_SRCDIR=config/${os_include_dir}
e4bf5dfc	391	ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir}
1568430f	392	ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}
2c5d0ae8 BK	393	AC_SUBST(ATOMICITY_SRCDIR)
2c5d0ae8 BK	394	AC_SUBST(ATOMIC_WORD_SRCDIR)
c2ba9709	395	AC_SUBST(ATOMIC_FLAGS)
4b90c838	396	AC_SUBST(CPU_DEFINES_SRCDIR)
1568430f	397	AC_SUBST(ABI_TWEAKS_SRCDIR)
cc5112c9	398	AC_SUBST(OS_INC_SRCDIR)
e4bf5dfc	399	AC_SUBST(ERROR_CONSTANTS_SRCDIR)
cc5112c9	400
9268b7cb	401
ff66d28f PE	402	# Determine cross-compile flags and AM_CONDITIONALs.
ff66d28f PE	403	#AC_SUBST(GLIBCXX_IS_NATIVE)
0df3f383	404	#AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
92eabea2	405	GLIBCXX_EVALUATE_CONDITIONALS
b25e6b79	406
5e53dba6	407	AC_CACHE_SAVE
b2dad0e3	408
ff66d28f	409	if test ${multilib} = yes; then
b2dad0e3 BK	410	multilib_arg="--enable-multilib"
	411	else
	412	multilib_arg=
	413	fi
	414
0df3f383	415	# Export all the install information.
3d7c150e	416	GLIBCXX_EXPORT_INSTALL_INFO
1fd2f510	417
6aa43d99	418	# Export all the include and flag information to Makefiles.
3d7c150e BK	419	GLIBCXX_EXPORT_INCLUDES
3d7c150e BK	420	GLIBCXX_EXPORT_FLAGS
e466dc8a	421
94872c09	422	if test "$enable_shared" = yes; then
8bae34da	423	PIC_CXXFLAGS="-prefer-pic"
f8e4b51d	424	else
8bae34da	425	PIC_CXXFLAGS=
f8e4b51d	426	fi
8bae34da	427	AC_SUBST(PIC_CXXFLAGS)
f8e4b51d	428
ff66d28f PE	429	dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
ff66d28f PE	430	dnl which can all be called multiple times as needed, plus one (different)
65fc9769	431	dnl AC_OUTPUT macro. This one lists the files to be created:
6330e1d9	432	AC_CONFIG_FILES(Makefile)
ff66d28f	433	AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
e1208a57	434	AC_CONFIG_FILES([scripts/extract_symvers],[chmod +x scripts/extract_symvers])
ff66d28f	435
6330e1d9 RW	436	# Multilibs need MULTISUBDIR defined correctly in certain makefiles so
	437	# that multilib installs will end up installed in the correct place.
	438	# The testsuite needs it for multilib-aware ABI baseline files.
	439	# To work around this not being passed down from config-ml.in ->
	440	# srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
	441	# append it here. Only modify Makefiles that have just been created.
	442	#
	443	# Also, get rid of this simulated-VPATH thing that automake does.
	444	AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
	445	[cat > vpsed$$ << \_EOF
0df3f383 PE	446	s!`test -f '$<' \|\| echo '$(srcdir)/'`!!
0df3f383 PE	447	_EOF
6330e1d9	448	sed -f vpsed$$ $ac_file > tmp$$
6330e1d9 RW	449	mv tmp$$ $ac_file
6330e1d9 RW	450	rm vpsed$$
d4e0a1c0 L	451	echo 'MULTISUBDIR =' >> $ac_file
	452	ml_norecursion=yes
	453	. ${multi_basedir}/config-ml.in
	454	AS_UNSET([ml_norecursion])
ff66d28f PE	455	])
ff66d28f PE	456
6330e1d9 RW	457	AC_CONFIG_COMMANDS([generate-headers],
	458	[(cd include && ${MAKE-make} pch_build= )])
	459
ff66d28f PE	460	dnl And this actually makes things happen:
ff66d28f PE	461	AC_OUTPUT