ltconfig

#! /bin/sh

# ltconfig - Create a system-specific libtool.
# Copyright (C) 1996-1998 Free Software Foundation, Inc.
# Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# As a special exception to the GNU General Public License, if you
# distribute this file as part of a program that contains a
# configuration script generated by Autoconf, you may include it under
# the same distribution terms that you use for the rest of that program.

# A lot of this script is taken from autoconf-2.10.

# Check that we are running under the correct shell.
SHELL=${CONFIG_SHELL-/bin/sh}
echo=echo
if test "X$1" = X--no-reexec; then
  # Discard the --no-reexec flag, and continue.
  shift
elif test "X`($echo '\t') 2>/dev/null`" = 'X\t'; then
  # Yippee, $echo works!
  :
else
  # Restart under the correct shell.
  exec "$SHELL" "$0" --no-reexec ${1+"$@"}
fi

# The HP-UX ksh and POSIX shell print the target directory to stdout
# if CDPATH is set.
if test "${CDPATH+set}" = set; then CDPATH=; export CDPATH; fi

if test "X`($echo '\t') 2>/dev/null`" != 'X\t'; then
  # The Solaris, AIX, and Digital Unix default echo programs unquote
  # backslashes.  This makes it impossible to quote backslashes using
  #   echo "$something" | sed 's/\\/\\\\/g'
  #
  # So, first we look for a working echo in the user's PATH.
  IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
  for dir in $PATH /usr/ucb; do
    if test -f $dir/echo && test "X`($dir/echo '\t') 2>/dev/null`" = 'X\t'; then
      echo="$dir/echo"
      break
    fi
  done
  IFS="$save_ifs"

  if test "X$echo" = Xecho; then
    # We didn't find a better echo, so look for alternatives.
    if test "X`(print -r '\t') 2>/dev/null`" = 'X\t'; then
      # This shell has a builtin print -r that does the trick.
      echo='print -r'
    elif test -f /bin/ksh && test "X$CONFIG_SHELL" != X/bin/ksh; then
      # If we have ksh, try running ltconfig again with it.
      CONFIG_SHELL=/bin/ksh
      export CONFIG_SHELL
      exec "$CONFIG_SHELL" "$0" --no-reexec ${1+"$@"}
    else
      # Try using printf.
      echo='printf %s\n'
      if test "X`($echo '\t') 2>/dev/null`" != 'X\t'; then
        # Oops.  We lost completely, so just stick with echo.
        echo=echo
      fi
    fi
  fi
fi

# Sed substitution that helps us do robust quoting.  It backslashifies
# metacharacters that are still active within double-quoted strings.
Xsed='sed -e s/^X//'
sed_quote_subst='s/\([\\"\\`$\\\\]\)/\\\1/g'

# Same as above, but do not quote variable references.
double_quote_subst='s/\([\\"\\`\\\\]\)/\\\1/g'

# The name of this program.
progname=`$echo "X$0" | $Xsed -e 's%^.*/%%'`

# Constants:
PROGRAM=ltconfig
PACKAGE=libtool
VERSION=1.2b
ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.c 1>&5'
ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.c $LIBS 1>&5'
rm="rm -f"

help="Try \`$progname --help' for more information."

# Global variables:
default_ofile=libtool
can_build_shared=yes
enable_shared=yes
# All known linkers require a `.a' archive for static linking.
enable_static=yes
ltmain=
silent=
srcdir=
ac_config_guess=
ac_config_sub=
host=
nonopt=
ofile="$default_ofile"
verify_host=yes
with_gcc=no
with_gnu_ld=no
objext=o
libext=a

old_AR="$AR"
old_CC="$CC"
old_CFLAGS="$CFLAGS"
old_CPPFLAGS="$CPPFLAGS"
old_LD="$LD"
old_LN_S="$LN_S"
old_NM="$NM"
old_RANLIB="$RANLIB"
old_DLLTOOL="$DLLTOOL"
old_AS="$AS"

# Parse the command line options.
args=
prev=
for option
do
  case "$option" in
  -*=*) optarg=`echo "$option" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
  *) optarg= ;;
  esac

  # If the previous option needs an argument, assign it.
  if test -n "$prev"; then
    eval "$prev=\$option"
    prev=
    continue
  fi

  case "$option" in
  --help) cat <<EOM
Usage: $progname [OPTION]... LTMAIN [HOST]

Generate a system-specific libtool script.

    --debug                enable verbose shell tracing
    --disable-shared       do not build shared libraries
    --disable-static       do not build static libraries
    --help                 display this help and exit
    --no-verify            do not verify that HOST is a valid host type
-o, --output=FILE          specify the output file [default=$default_ofile]
    --quiet                same as \`--silent'
    --silent               do not print informational messages
    --srcdir=DIR           find \`config.guess' in DIR
    --version              output version information and exit
    --with-gcc             assume that the GNU C compiler will be used
    --with-gnu-ld          assume that the C compiler uses the GNU linker

LTMAIN is the \`ltmain.sh' shell script fragment that provides basic libtool
functionality.

HOST is the canonical host system name [default=guessed].
EOM
  exit 0
  ;;

  --debug)
    echo "$progname: enabling shell trace mode"
    set -x
    ;;

  --disable-shared) enable_shared=no ;;

  --disable-static) enable_static=no ;;

  --quiet | --silent) silent=yes ;;

  --srcdir) prev=srcdir ;;
  --srcdir=*) srcdir="$optarg" ;;

  --no-verify) verify_host=no ;;

  --output | -o) prev=ofile ;;
  --output=*) ofile="$optarg" ;;

  --version) echo "$PROGRAM (GNU $PACKAGE) $VERSION"; exit 0 ;;

  --with-gcc) with_gcc=yes ;;
  --with-gnu-ld) with_gnu_ld=yes ;;

  -*)
    echo "$progname: unrecognized option \`$option'" 1>&2
    echo "$help" 1>&2
    exit 1
    ;;

  *)
    if test -z "$ltmain"; then
      ltmain="$option"
    elif test -z "$host"; then
# This generates an unnecessary warning for sparc-sun-solaris4.1.3_U1
#      if test -n "`echo $option| sed 's/[-a-z0-9.]//g'`"; then
#        echo "$progname: warning \`$option' is not a valid host type" 1>&2
#      fi
      host="$option"
    else
      echo "$progname: too many arguments" 1>&2
      echo "$help" 1>&2
      exit 1
    fi ;;
  esac
done

if test -z "$ltmain"; then
  echo "$progname: you must specify a LTMAIN file" 1>&2
  echo "$help" 1>&2
  exit 1
fi

if test ! -f "$ltmain"; then
  echo "$progname: \`$ltmain' does not exist" 1>&2
  echo "$help" 1>&2
  exit 1
fi

# Quote any args containing shell metacharacters.
ltconfig_args=
for arg
do
  case "$arg" in
  *" "*|*"	"*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?]*)
  ltconfig_args="$ltconfig_args '$arg'" ;;
  *) ltconfig_args="$ltconfig_args $arg" ;;
  esac
done

# A relevant subset of AC_INIT.

# File descriptor usage:
# 0 standard input
# 1 file creation
# 2 errors and warnings
# 3 some systems may open it to /dev/tty
# 4 used on the Kubota Titan
# 5 compiler messages saved in config.log
# 6 checking for... messages and results
if test "$silent" = yes; then
  exec 6>/dev/null
else
  exec 6>&1
fi
exec 5>>./config.log

# NLS nuisances.
# Only set LANG and LC_ALL to C if already set.
# These must not be set unconditionally because not all systems understand
# e.g. LANG=C (notably SCO).
if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi
if test "${LANG+set}"   = set; then LANG=C;   export LANG;   fi

if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
  # Stardent Vistra SVR4 grep lacks -e, says ghazi@caip.rutgers.edu.
  if (echo -n testing; echo 1,2,3) | sed s/-n/xn/ | grep xn >/dev/null; then
    ac_n= ac_c='
' ac_t='	'
  else
    ac_n=-n ac_c= ac_t=
  fi
else
  ac_n= ac_c='\c' ac_t=
fi

if test -z "$srcdir"; then
  # Assume the source directory is the same one as the path to ltmain.sh.
  srcdir=`$echo "$ltmain" | $Xsed -e 's%/[^/]*$%%'`
  test "$srcdir" = "$ltmain" && srcdir=.
fi

trap "$rm conftest*; exit 1" 1 2 15
if test "$verify_host" = yes; then
  # Check for config.guess and config.sub.
  ac_aux_dir=
  for ac_dir in $srcdir $srcdir/.. $srcdir/../..; do
    if test -f $ac_dir/config.guess; then
      ac_aux_dir=$ac_dir
      break
    fi
  done
  if test -z "$ac_aux_dir"; then
    echo "$progname: cannot find config.guess in $srcdir $srcdir/.. $srcdir/../.." 1>&2
    echo "$help" 1>&2
    exit 1
  fi
  ac_config_guess=$ac_aux_dir/config.guess
  ac_config_sub=$ac_aux_dir/config.sub

  # Make sure we can run config.sub.
  if $SHELL $ac_config_sub sun4 >/dev/null 2>&1; then :
  else
    echo "$progname: cannot run $ac_config_sub" 1>&2
    echo "$help" 1>&2
    exit 1
  fi

  echo $ac_n "checking host system type""... $ac_c" 1>&6

  host_alias=$host
  case "$host_alias" in
  "")
    if host_alias=`$SHELL $ac_config_guess`; then :
    else
      echo "$progname: cannot guess host type; you must specify one" 1>&2
      echo "$help" 1>&2
      exit 1
    fi ;;
  esac
  host=`$SHELL $ac_config_sub $host_alias`
  echo "$ac_t$host" 1>&6

  # Make sure the host verified.
  test -z "$host" && exit 1

elif test -z "$host"; then
  echo "$progname: you must specify a host type if you use \`--no-verify'" 1>&2
  echo "$help" 1>&2
  exit 1
else
  host_alias=$host
fi

# Transform linux* to *-*-linux-gnu*, to support old configure scripts.
case "$host_os" in
linux-gnu*) ;;
linux*) host=`echo $host | sed 's/^\(.*-.*-linux\)\(.*\)$/\1-gnu\2/'`
esac

host_cpu=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\1/'`
host_vendor=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\2/'`
host_os=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`

case "$host_os" in
aix3*)
  # AIX sometimes has problems with the GCC collect2 program.  For some
  # reason, if we set the COLLECT_NAMES environment variable, the problems
  # vanish in a puff of smoke.
  if test "${COLLECT_NAMES+set}" != set; then
    COLLECT_NAMES=
    export COLLECT_NAMES
  fi
  ;;
esac

# Determine commands to create old-style static archives.
old_archive_cmds='$AR cru $oldlib$oldobjs'
old_postinstall_cmds='chmod 644 $oldlib'
old_postuninstall_cmds=

# Set a sane default for `AR'.
test -z "$AR" && AR=ar

# If RANLIB is not set, then run the test.
if test "${RANLIB+set}" != "set"; then
  result=no

  echo $ac_n "checking for ranlib... $ac_c" 1>&6
  IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
  for dir in $PATH; do
    test -z "$dir" && dir=.
    if test -f $dir/ranlib; then
      RANLIB="ranlib"
      result="ranlib"
      break
    fi
  done
  IFS="$save_ifs"

  echo "$ac_t$result" 1>&6
fi

if test -n "$RANLIB"; then
  old_archive_cmds="$old_archive_cmds;\$RANLIB \$oldlib"
  old_postinstall_cmds="\$RANLIB \$oldlib;$old_postinstall_cmds"
fi

# Set sane defaults for `DLLTOOL' and `AS', used on cygwin32.
test -z "$DLLTOOL" && DLLTOOL=dlltool
test -z "$AS" && AS=as

# Check to see if we are using GCC.
if test "$with_gcc" != yes || test -z "$CC"; then
  # If CC is not set, then try to find GCC or a usable CC.
  if test -z "$CC"; then
    echo $ac_n "checking for gcc... $ac_c" 1>&6
    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
    for dir in $PATH; do
      IFS="$save_ifs"
      test -z "$dir" && dir=.
      if test -f $dir/gcc; then
	CC="gcc"
	break
      fi
    done
    IFS="$save_ifs"

    if test -n "$CC"; then
      echo "$ac_t$CC" 1>&6
    else
      echo "$ac_t"no 1>&6
    fi
  fi

  # Not "gcc", so try "cc", rejecting "/usr/ucb/cc".
  if test -z "$CC"; then
    echo $ac_n "checking for cc... $ac_c" 1>&6
    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
    cc_rejected=no
    for dir in $PATH; do
      test -z "$dir" && dir=.
      if test -f $dir/cc; then
	if test "$dir/cc" = "/usr/ucb/cc"; then
	  cc_rejected=yes
	  continue
	fi
	CC="cc"
	break
      fi
    done
    IFS="$save_ifs"
    if test $cc_rejected = yes; then
      # We found a bogon in the path, so make sure we never use it.
      set dummy $CC
      shift
      if test $# -gt 0; then
	# We chose a different compiler from the bogus one.
	# However, it has the same name, so the bogon will be chosen
	# first if we set CC to just the name; use the full file name.
	shift
	set dummy "$dir/cc" "$@"
	shift
	CC="$@"
      fi
    fi

    if test -n "$CC"; then
      echo "$ac_t$CC" 1>&6
    else
      echo "$ac_t"no 1>&6
    fi

    if test -z "$CC"; then
      echo "$progname: error: no acceptable cc found in \$PATH" 1>&2
      exit 1
    fi
  fi

  # Now see if the compiler is really GCC.
  with_gcc=no
  echo $ac_n "checking whether we are using GNU C... $ac_c" 1>&6
  echo "$progname:470: checking whether we are using GNU C" >&5

  $rm conftest.c
  cat > conftest.c <<EOF
#ifdef __GNUC__
  yes;
#endif
EOF
  if { ac_try='${CC-cc} -E conftest.c'; { (eval echo $progname:478: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
    with_gcc=yes
  fi
  $rm conftest.c
  echo "$ac_t$with_gcc" 1>&6
fi

# Allow CC to be a program name with arguments.
set dummy $CC
compiler="$2"

echo $ac_n "checking for object suffix... $ac_c" 1>&6
$rm conftest*
echo 'int i = 1;' > conftest.c
echo "$progname:492: checking for object suffix" >& 5
if { (eval echo $progname:493: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>conftest.err; }; then
  # Append any warnings to the config.log.
  cat conftest.err 1>&5

  for ac_file in conftest.*; do
    case $ac_file in
    *.c) ;;
    *) objext=`echo $ac_file | sed -e s/conftest.//` ;;
    esac
  done
else
  cat conftest.err 1>&5
  echo "$progname: failed program was:" >&5
  cat conftest.c >&5
fi
$rm conftest*
echo "$ac_t$objext" 1>&6

echo $ac_n "checking for $compiler option to produce PIC... $ac_c" 1>&6
pic_flag=
special_shlib_compile_flags=
wl=
link_static_flag=
no_builtin_flag=

if test "$with_gcc" = yes; then
  wl='-Wl,'
  link_static_flag='-static'
  no_builtin_flag=' -fno-builtin'

  case "$host_os" in
  aix3* | aix4* | irix5* | irix6* | osf3* | osf4*)
    # PIC is the default for these OSes.
    ;;
  cygwin32* | mingw32* | os2*)
    # We can build DLLs from non-PIC.
    ;;
  amigaos*)
    # FIXME: we need at least 68020 code to build shared libraries, but
    # adding the `-m68020' flag to GCC prevents building anything better,
    # like `-m68040'.
    pic_flag='-m68020 -resident32 -malways-restore-a4'
    ;;
  *)
    pic_flag='-fPIC'
    ;;
  esac
else
  # PORTME Check for PIC flags for the system compiler.
  case "$host_os" in
  aix3* | aix4*)
    # All AIX code is PIC.
    link_static_flag='-bnso -bI:/lib/syscalls.exp'
    ;;

  hpux9* | hpux10* | hpux11*)
    # Is there a better link_static_flag that works with the bundled CC?
    wl='-Wl,'
    link_static_flag="${wl}-a ${wl}archive"
    pic_flag='+Z'
    ;;

  irix5* | irix6*)
    wl='-Wl,'
    link_static_flag='-non_shared'
    # PIC (with -KPIC) is the default.
    ;;

  cygwin32* | mingw32* | os2*)
    # We can build DLLs from non-PIC.
    ;;

  osf3* | osf4*)
    # All OSF/1 code is PIC.
    wl='-Wl,'
    link_static_flag='-non_shared'
    ;;

  sco3.2v5*)
    pic_flag='-Kpic'
    link_static_flag='-dn'
    special_shlib_compile_flags='-belf'
    ;;

  solaris2*)
    pic_flag='-KPIC'
    link_static_flag='-Bstatic'
    wl='-Wl,'
    ;;

  sunos4*)
    pic_flag='-PIC'
    link_static_flag='-Bstatic'
    wl='-Qoption ld '
    ;;

  sysv4.2uw2*)
    pic_flag='-KPIC'
    link_static_flag='-Bstatic'
    wl='-Wl,'
    ;;

  uts4*)
    pic_flag='-pic'
    link_static_flag='-Bstatic'
    ;;

  *)
    can_build_shared=no
    ;;
  esac
fi

if test -n "$pic_flag"; then
  echo "$ac_t$pic_flag" 1>&6

  # Check to make sure the pic_flag actually works.
  echo $ac_n "checking if $compiler PIC flag $pic_flag works... $ac_c" 1>&6
  $rm conftest*
  echo "int some_variable = 0;" > conftest.c
  save_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS $pic_flag -DPIC"
  echo "$progname:615: checking if $compiler PIC flag $pic_flag works" >&5
  if { (eval echo $progname:616: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>conftest.err; } && test -s conftest.$objext; then
    # Append any warnings to the config.log.
    cat conftest.err 1>&5

    # On HP-UX, both CC and GCC only warn that PIC is supported... then they
    # create non-PIC objects.  So, if there were any warnings, we assume that
    # PIC is not supported.
    if test -s conftest.err; then
      echo "$ac_t"no 1>&6
      can_build_shared=no
      pic_flag=
    else
      echo "$ac_t"yes 1>&6
      pic_flag=" $pic_flag"
    fi
  else
    # Append any errors to the config.log.
    cat conftest.err 1>&5
    can_build_shared=no
    pic_flag=
    echo "$ac_t"no 1>&6
  fi
  CFLAGS="$save_CFLAGS"
  $rm conftest*
else
  echo "$ac_t"none 1>&6
fi

# Check for any special shared library compilation flags.
if test -n "$special_shlib_compile_flags"; then
  echo "$progname: warning: \`$CC' requires \`$special_shlib_compile_flags' to build shared libraries" 1>&2
  if echo "$old_CC $old_CFLAGS " | egrep -e "[ 	]$special_shlib_compile_flags[ 	]" >/dev/null; then :
  else
    echo "$progname: add \`$special_shlib_compile_flags' to the CC or CFLAGS env variable and reconfigure" 1>&2
    can_build_shared=no
  fi
fi

echo $ac_n "checking if $compiler static flag $link_static_flag works... $ac_c" 1>&6
$rm conftest*
echo 'main(){return(0);}' > conftest.c
save_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS $link_static_flag"
echo "$progname:659: checking if $compiler static flag $link_static_flag works" >&5
if { (eval echo $progname:660: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
  echo "$ac_t$link_static_flag" 1>&6
else
  echo "$ac_t"none 1>&6
  link_static_flag=
fi
LDFLAGS="$save_LDFLAGS"
$rm conftest*

if test -z "$LN_S"; then
  # Check to see if we can use ln -s, or we need hard links.
  echo $ac_n "checking whether ln -s works... $ac_c" 1>&6
  $rm conftestdata
  if ln -s X conftestdata 2>/dev/null; then
    $rm conftestdata
    LN_S="ln -s"
  else
    LN_S=ln
  fi
  if test "$LN_S" = "ln -s"; then
    echo "$ac_t"yes 1>&6
  else
    echo "$ac_t"no 1>&6
  fi
fi

# Make sure LD is an absolute path.
if test -z "$LD"; then
  ac_prog=ld
  if test "$with_gcc" = yes; then
    # Check if gcc -print-prog-name=ld gives a path.
    echo $ac_n "checking for ld used by GCC... $ac_c" 1>&6
    echo "$progname:692: checking for ld used by GCC" >&5
    ac_prog=`($CC -print-prog-name=ld) 2>&5`
    case "$ac_prog" in
    # Accept absolute paths.
    /* | [A-Za-z]:[/\\]*)
      test -z "$LD" && LD="$ac_prog"
      ;;
    "")
      # If it fails, then pretend we are not using GCC.
      ac_prog=ld
      ;;
    *)
      # If it is relative, then search for the first ld in PATH.
      with_gnu_ld=unknown
      ;;
    esac
  elif test "$with_gnu_ld" = yes; then
    echo $ac_n "checking for GNU ld... $ac_c" 1>&6
    echo "$progname:710: checking for GNU ld" >&5
  else
    echo $ac_n "checking for non-GNU ld""... $ac_c" 1>&6
    echo "$progname:713: checking for non-GNU ld" >&5
  fi

  if test -z "$LD"; then
    IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
    for ac_dir in $PATH; do
      test -z "$ac_dir" && ac_dir=.
      if test -f "$ac_dir/$ac_prog"; then
	LD="$ac_dir/$ac_prog"
	# Check to see if the program is GNU ld.  I'd rather use --version,
	# but apparently some GNU ld's only accept -v.
	# Break only if it was the GNU/non-GNU ld that we prefer.
	if "$LD" -v 2>&1 < /dev/null | egrep '(GNU|with BFD)' > /dev/null; then
	  test "$with_gnu_ld" != no && break
	else
	  test "$with_gnu_ld" != yes && break
	fi
      fi
    done
    IFS="$ac_save_ifs"
  fi

  if test -n "$LD"; then
    echo "$ac_t$LD" 1>&6
  else
    echo "$ac_t"no 1>&6
  fi

  if test -z "$LD"; then
    echo "$progname: error: no acceptable ld found in \$PATH" 1>&2
    exit 1
  fi
fi

# Check to see if it really is or is not GNU ld.
echo $ac_n "checking if the linker ($LD) is GNU ld... $ac_c" 1>&6
# I'd rather use --version here, but apparently some GNU ld's only accept -v.
if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
  with_gnu_ld=yes
else
  with_gnu_ld=no
fi
echo "$ac_t$with_gnu_ld" 1>&6

# See if the linker supports building shared libraries.
echo $ac_n "checking whether the linker ($LD) supports shared libraries... $ac_c" 1>&6

allow_undefined_flag=
no_undefined_flag=
archive_cmds=
old_archive_from_new_cmds=
export_dynamic_flag_spec=
whole_archive_flag_spec=
hardcode_libdir_flag_spec=
hardcode_libdir_separator=
hardcode_direct=no
hardcode_minus_L=no
hardcode_shlibpath_var=unsupported
runpath_var=
fix_srcfile_path=

case "$host_os" in
aix3* | aix4*)
  # On AIX, the GNU linker works like the native linker.
  with_gnu_ld=no
  ;;
esac

ld_shlibs=yes
if test "$with_gnu_ld" = yes; then

  # See if GNU ld supports shared libraries.
  case "$host_os" in
  amigaos*)
    archive_cmds='$rm $objdir/a2ixlibrary.data;$echo "#define NAME $libname" > $objdir/a2ixlibrary.data;$echo "#define LIBRARY_ID 1" >> $objdir/a2ixlibrary.data;$echo "#define VERSION $major" >> $objdir/a2ixlibrary.data;$echo "#define REVISION $revision" >> $objdir/a2ixlibrary.data;$AR cru $lib$libobjs;$RANLIB $lib;(cd $objdir && a2ixlibrary -32)'
    hardcode_libdir_flag_spec='-L$libdir'
    hardcode_minus_L=yes
    ;;

  sunos4*)
    archive_cmds='$LD -assert pure-text -Bstatic -o $lib$libobjs'
    hardcode_direct=yes
    # The GNU linker will only hardcode -L options if -rpath is not
    # used, but we will be using -rpath because we set
    # hardcode_libdir_flag_spec below.
    hardcode_minus_L=no
    hardcode_shlibpath_var=no
    ;;

  cygwin32* | mingw32*)
    if test "$with_gcc" = yes; then
      # hardcode_libdir_flag_spec is actually meaningless, as there is
      # no search path for DLLs.
      hardcode_libdir_flag_spec='-L$libdir'
      allow_undefined_flag=unsupported
      # Very, very bogus.
      echo '
#include <windows.h>

struct _reent *_impure_ptr;
extern struct _reent *__imp_reent_data;
BOOL APIENTRY
__dll_entry (HINSTANCE hinst, DWORD reason, LPVOID reserved)
{
  _impure_ptr = __imp_reent_data;
}
' > libtool.c
      archive_cmds='$CC -c '"`pwd`"'/libtool.c;echo EXPORTS > $soname-def;$NM$libobjs | $global_symbol_pipe | sed '\''s/.* //'\'' >> $soname-def;$LD -s --base-file $soname-base --dll -e ___dll_entry@12 -o $lib libtool.$objext$libobjs$deplibs;$DLLTOOL --as=$AS --dllname $soname --def $soname-def --base-file $soname-base --output-exp $soname-exp;$LD -s --base-file $soname-base $soname-exp --dll -e ___dll_entry@12 -o $lib libtool.$objext$libobjs$deplibs;$DLLTOOL --as=$AS --dllname $soname --def $soname-def --base-file $soname-base --output-exp $soname-exp;$LD $soname-exp --dll -e ___dll_entry@12 -o $lib libtool.$objext$libobjs$deplibs;$rm libtool.$objext $soname-base $soname-exp'
      old_archive_from_new_cmds='$DLLTOOL --as=$AS --dllname $soname --def $soname-def --output-lib $objdir/$libname.a;$rm $soname-def'
    else
      # When not using gcc, we currently assume that we are using
      # Microsoft Visual C++.
      with_gnu_ld=no
      # hardcode_libdir_flag_spec is actually meaningless, as there is
      # no search path for DLLs.
      hardcode_libdir_flag_spec=' '
      allow_undefined_flag=unsupported
      # Tell ltmain to make .lib files, not .a files.
      libext=lib
      # FIXME: Setting linknames here is a bad hack.
      archive_cmds='$CC -o $lib$libobjs`echo "$deplibs" | sed -e '\''s/ -lc$//'\''` -link -dll;linknames='
      # The linker will automatically build a .lib file if we build a DLL.
      old_archive_from_new_cmds='true'
      # FIXME: Should let the user specify the lib program.
      old_archive_cmds='lib /OUT:$oldlib$oldobjs'
      fix_srcfile_path='`cygpath -w $srcfile`'
    fi
    ;;

  *)
    if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
      archive_cmds='$CC -shared ${wl}-soname $wl$soname -o $lib$libobjs'
    else
      ld_shlibs=no
    fi
    ;;
  esac

  if test "$ld_shlibs" = yes && test "$with_gnu_ld" = yes; then
    runpath_var=LD_RUN_PATH
    hardcode_libdir_flag_spec='${wl}--rpath ${wl}$libdir'
    export_dynamic_flag_spec='${wl}--export-dynamic'
    whole_archive_flag_spec='${wl}--whole-archive$convenience ${wl}--no-whole-archive'
  fi
else
  # PORTME fill in a description of your system's linker (not GNU ld)
  case "$host_os" in
  aix3*)
    allow_undefined_flag=unsupported
    archive_cmds='$NM$libobjs | $global_symbol_pipe | sed '\''s/.* //'\'' > $lib.exp;$LD -o $objdir/$soname$libobjs -bE:$lib.exp -T512 -H512 -bM:SRE;$AR cru $lib $objdir/$soname'
    # Note: this linker hardcodes the directories in LIBPATH if there
    # are no directories specified by -L.
    hardcode_minus_L=yes
    if test "$with_gcc" = yes && test -z "$link_static_flag"; then
      # Neither direct hardcoding nor static linking is supported with a
      # broken collect2.
      hardcode_direct=unsupported
    fi
    ;;

  aix4*)
    allow_undefined_flag=unsupported
    archive_cmds='$NM$libobjs | $global_symbol_pipe | sed '\''s/.* //'\'' > $lib.exp;$CC -o $objdir/$soname$libobjs ${wl}-bE:$lib.exp ${wl}-bM:SRE ${wl}-bnoentry;$AR cru $lib $objdir/$soname'
    hardcode_direct=yes
    hardcode_minus_L=yes
    ;;

  amigaos*)
    archive_cmds='$rm $objdir/a2ixlibrary.data;$echo "#define NAME $libname" > $objdir/a2ixlibrary.data;$echo "#define LIBRARY_ID 1" >> $objdir/a2ixlibrary.data;$echo "#define VERSION $major" >> $objdir/a2ixlibrary.data;$echo "#define REVISION $revision" >> $objdir/a2ixlibrary.data;$AR cru $lib$libobjs;$RANLIB $lib;(cd $objdir && a2ixlibrary -32)'
    hardcode_libdir_flag_spec='-L$libdir'
    hardcode_minus_L=yes
    ;;

  cygwin32* | mingw32*)
    if test "$with_gcc" = yes; then
      # hardcode_libdir_flag_spec is actually meaningless, as there is
      # no search path for DLLs.
      hardcode_libdir_flag_spec='-L$libdir'
      allow_undefined_flag=unsupported
      # Very, very bogus.
      echo '
#include <windows.h>

struct _reent *_impure_ptr;
extern struct _reent *__imp_reent_data;
BOOL APIENTRY
__dll_entry (HINSTANCE hinst, DWORD reason, LPVOID reserved)
{
  _impure_ptr = __imp_reent_data;
}
' > libtool.c
      archive_cmds='$CC -c '"`pwd`"'/libtool.c;echo EXPORTS > $soname-def;$NM$libobjs | $global_symbol_pipe | sed '\''s/.* //'\'' >> $soname-def;$LD -s --base-file $soname-base --dll -e ___dll_entry@12 -o $lib libtool.$objext$libobjs$deplibs;$DLLTOOL --as=$AS --dllname $soname --def $soname-def --base-file $soname-base --output-exp $soname-exp;$LD -s --base-file $soname-base $soname-exp --dll -e ___dll_entry@12 -o $lib libtool.$objext$libobjs$deplibs;$DLLTOOL --as=$AS --dllname $soname --def $soname-def --base-file $soname-base --output-exp $soname-exp;$LD $soname-exp --dll -e ___dll_entry@12 -o $lib libtool.$objext$libobjs$deplibs;$rm libtool.$objext $soname-base $soname-exp'
      old_archive_from_new_cmds='$DLLTOOL --as=$AS --dllname $soname --def $soname-def --output-lib $objdir/$libname.a;$rm $soname-def'
    else
      # When not using gcc, we currently assume that we are using
      # Microsoft Visual C++.
      # hardcode_libdir_flag_spec is actually meaningless, as there is
      # no search path for DLLs.
      hardcode_libdir_flag_spec=' '
      allow_undefined_flag=unsupported
      # Tell ltmain to make .lib files, not .a files.
      libext=lib
      # FIXME: Setting linknames here is a bad hack.
      archive_cmds='$CC -o $lib$libobjs`echo "$deplibs" | sed -e '\''s/ -lc$//'\''` -link -dll;linknames='
      # The linker will automatically build a .lib file if we build a DLL.
      old_archive_from_new_cmds='true'
      # FIXME: Should let the user specify the lib program.
      old_archive_cmds='lib /OUT:$oldlib$oldobjs'
      fix_srcfile_path='`cygpath -w $srcfile`'
    fi
    ;;

  # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor
  # support.  Future versions do this automatically, but an explicit c++rt0.o
  # does not break anything, and helps significantly (at the cost of a little
  # extra space).
  freebsd2.2*)
    archive_cmds='$LD -Bshareable -o $lib$libobjs /usr/lib/c++rt0.o'
    hardcode_libdir_flag_spec='-R$libdir'
    hardcode_direct=yes
    hardcode_minus_L=yes
    hardcode_shlibpath_var=no
    ;;

  # Unfortunately, older versions of FreeBSD 2 do not have this feature.
  freebsd2*)
    archive_cmds='$LD -Bshareable -o $lib$libobjs'
    hardcode_direct=yes
    hardcode_minus_L=yes
    hardcode_shlibpath_var=no
    ;;

  # FreeBSD 3, at last, uses gcc -shared to do shared libraries.
  freebsd3*)
    archive_cmds='$CC -shared -o $lib$libobjs'
    hardcode_libdir_flag_spec='-R$libdir'
    hardcode_direct=yes
    hardcode_minus_L=no
    hardcode_shlibpath_var=no
    ;;

  hpux9*)
    archive_cmds='$rm $objdir/$soname;$LD -b +s +b $install_libdir -o $objdir/$soname$libobjs;mv $objdir/$soname $lib'
    hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
    hardcode_direct=yes
    hardcode_minus_L=yes
    export_dynamic_flag_spec='${wl}-E'
    ;;

  hpux10* | hpux11*)
    archive_cmds='$LD -b +h $soname +s +b $install_libdir -o $lib$libobjs'
    hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
    hardcode_direct=yes
    hardcode_minus_L=yes
    export_dynamic_flag_spec='${wl}-E'
    ;;

  irix5* | irix6*)
    if test "$with_gcc" = yes; then
      archive_cmds='$CC -shared -o $lib ${wl}-soname ${wl}$soname ${wl}-set_version ${wl}$verstring$libobjs'
    else
      archive_cmds='$LD -shared -o $lib -soname $soname -set_version $verstring$libobjs'
    fi
    hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
    ;;

  netbsd*)
    # Tested with NetBSD 1.2 ld
    archive_cmds='$LD -Bshareable -o $lib$libobjs'
    hardcode_libdir_flag_spec='-R$libdir'
    hardcode_direct=yes
    hardcode_shlibpath_var=no
    ;;

  openbsd*)
    archive_cmds='$LD -Bshareable -o $lib$libobjs'
    hardcode_libdir_flag_spec='-R$libdir'
    hardcode_direct=yes
    hardcode_shlibpath_var=no
    ;;

  os2*)
    hardcode_libdir_flag_spec='-L$libdir'
    hardcode_minus_L=yes
    allow_undefined_flag=unsupported
    archive_cmds='$echo "LIBRARY $libname INITINSTANCE" > $objdir/$libname.def;$echo "DESCRIPTION \"$libname\"" >> $objdir/$libname.def;$echo DATA >> $objdir/$libname.def;$echo " SINGLE NONSHARED" >> $objdir/$libname.def;$echo EXPORTS >> $objdir/$libname.def;emxexp$libobjs >> $objdir/$libname.def;$CC -Zdll -Zcrtdll -o $lib$libobjs $objdir/$libname.def'
    old_archive_from_new_cmds='emximp -o $objdir/$libname.a $objdir/$libname.def'
    ;;

  osf3* | osf4*)
    allow_undefined_flag=' -expect_unresolved \*'
    archive_cmds='$LD -shared${allow_undefined_flag} -o $lib -soname $soname -set_version $verstring$libobjs$deplibs'
    hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
    hardcode_libdir_separator=:
    ;;

  sco3.2v5*)
    archive_cmds='$LD -G -o $lib$libobjs'
    hardcode_direct=yes
    ;;

  solaris2*)
    no_undefined_flag=' -z text'
    archive_cmds='$LD -G${allow_undefined_flag} -h $soname -o $lib$libobjs'
    hardcode_libdir_flag_spec='-R$libdir'
    hardcode_shlibpath_var=no

    # Solaris 2 before 2.5 hardcodes -L paths.
    case "$host_os" in
    solaris2.[0-4]*)
      hardcode_minus_L=yes
      ;;
    esac
    ;;

  sunos4*)
    archive_cmds='$LD -assert pure-text -Bstatic -o $lib$libobjs'
    hardcode_libdir_flag_spec='-L$libdir'
    hardcode_direct=yes
    hardcode_minus_L=yes
    hardcode_shlibpath_var=no
    ;;

  uts4*)
    archive_cmds='$LD -G -h $soname -o $lib$libobjs'
    hardcode_libdir_flag_spec='-L$libdir'
    hardcode_direct=no
    hardcode_minus_L=no
    hardcode_shlibpath_var=no
    ;;

  *)
    ld_shlibs=no
    can_build_shared=no
    ;;
  esac
fi
echo "$ac_t$ld_shlibs" 1>&6

if test -z "$NM"; then
  echo $ac_n "checking for BSD-compatible nm... $ac_c" 1>&6
  case "$NM" in
  /* | [A-Za-z]:[/\\]*) ;; # Let the user override the test with a path.
  *)
    IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
    for ac_dir in /usr/ucb /usr/ccs/bin $PATH /bin; do
      test -z "$ac_dir" && ac_dir=.
      if test -f $ac_dir/nm; then
        # Check to see if the nm accepts a BSD-compat flag.
        # Adding the `sed 1q' prevents false positives on HP-UX, which says:
        #   nm: unknown option "B" ignored
        if ($ac_dir/nm -B /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
          NM="$ac_dir/nm -B"
        elif ($ac_dir/nm -p /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
          NM="$ac_dir/nm -p"
	else
          NM="$ac_dir/nm"
	fi
        break
      fi
    done
    IFS="$ac_save_ifs"
    test -z "$NM" && NM=nm
    ;;
  esac
  echo "$ac_t$NM" 1>&6
fi

# Check for command to grab the raw symbol name followed by C symbol from nm.
echo $ac_n "checking command to parse $NM output... $ac_c" 1>&6

# These are sane defaults that work on at least a few old systems.
# [They come from Ultrix.  What could be older than Ultrix?!! ;)]

# Character class describing NM global symbol codes.
symcode='[BCDEGRSTU]'

# Regexp to match symbols that can be accessed directly from C.
sympat='\([_A-Za-z][_A-Za-z0-9]*\)'

# Transform the above into a raw symbol and a C symbol.
symxfrm='\1 \1'

# Define system-specific variables.
case "$host_os" in
aix*)
  symcode='[BCDTU]'
  ;;
cygwin32* | mingw32*)
  sympat='_\([_A-Za-z][_A-Za-z0-9]*\)'
  symxfrm='_\1 \1'
  ;;
irix*)
  # Cannot use undefined symbols on IRIX because inlined functions mess us up.
  symcode='[BCDEGRST]'
  ;;
solaris2*)
  symcode='[BDTU]'
  ;;
esac

# If we're using GNU nm, then use its standard symbol codes.
if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then
  symcode='[ABCDGISTUW]'
fi

case "$host_os" in
cygwin32* | mingw32*)
  # We do not want undefined symbols on cygwin32.  The user must
  # arrange to define them via -l arguments.
  symcode='[ABCDGISTW]'
  ;;
esac

# Write the raw and C identifiers.
global_symbol_pipe="sed -n -e 's/^.* $symcode $sympat$/$symxfrm/p'"

# Check to see that the pipe works correctly.
pipe_works=no
$rm conftest*
cat > conftest.c <<EOF
#ifdef __cplusplus
extern "C" {
#endif
char nm_test_var;
void nm_test_func(){}
#ifdef __cplusplus
}
#endif
main(){nm_test_var='a';nm_test_func();return(0);}
EOF

echo "$progname:1145: checking if global_symbol_pipe works" >&5
if { (eval echo $progname:1146: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; } && test -s conftest.$objext; then
  # Now try to grab the symbols.
  nlist=conftest.nm
  if { echo "$progname:1149: eval \"$NM conftest.$objext | $global_symbol_pipe > $nlist\"" >&5; eval "$NM conftest.$objext | $global_symbol_pipe > $nlist 2>&5"; } && test -s "$nlist"; then

    # Try sorting and uniquifying the output.
    if sort "$nlist" | uniq > "$nlist"T; then
      mv -f "$nlist"T "$nlist"
      wcout=`wc "$nlist" 2>/dev/null`
      count=`$echo "X$wcout" | $Xsed -e 's/^[ 	]*\([0-9][0-9]*\).*$/\1/'`
      (test "$count" -ge 0) 2>/dev/null || count=-1
    else
      rm -f "$nlist"T
      count=-1
    fi

    # Make sure that we snagged all the symbols we need.
    if egrep ' nm_test_var$' "$nlist" >/dev/null; then
      if egrep ' nm_test_func$' "$nlist" >/dev/null; then
	cat <<EOF > conftest.c
#ifdef __cplusplus
extern "C" {
#endif

EOF
        # Now generate the symbol file.
        sed 's/^.* \(.*\)$/extern char \1;/' < "$nlist" >> conftest.c

	cat <<EOF >> conftest.c
#if defined (__STDC__) && __STDC__
# define __ptr_t void *
#else
# define __ptr_t char *
#endif

/* The number of symbols in dld_preloaded_symbols, -1 if unsorted. */
int dld_preloaded_symbol_count = $count;

/* The mapping between symbol names and symbols. */
struct {
  char *name;
  __ptr_t address;
}
dld_preloaded_symbols[] =
{
EOF
        sed 's/^\(.*\) \(.*\)$/  {"\1", (__ptr_t) \&\2},/' < "$nlist" >> conftest.c
        cat <<\EOF >> conftest.c
  {0, (__ptr_t) 0}
};

#ifdef __cplusplus
}
#endif
EOF
        # Now try linking the two files.
        mv conftest.$objext conftestm.$objext
	save_LIBS="$LIBS"
	save_CFLAGS="$CFLAGS"
        LIBS="conftestm.$objext"
	CFLAGS="$CFLAGS$no_builtin_flag"
        if { (eval echo $progname:1207: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
          pipe_works=yes
        else
          echo "$progname: failed program was:" >&5
          cat conftest.c >&5
        fi
        LIBS="$save_LIBS"
      else
        echo "cannot find nm_test_func in $nlist" >&5
      fi
    else
      echo "cannot find nm_test_var in $nlist" >&5
    fi
  else
    echo "cannot run $global_symbol_pipe" >&5
  fi
else
  echo "$progname: failed program was:" >&5
  cat conftest.c >&5
fi
$rm conftest*

# Do not use the global_symbol_pipe unless it works.
echo "$ac_t$pipe_works" 1>&6
test "$pipe_works" = yes || global_symbol_pipe=

# Check hardcoding attributes.
echo $ac_n "checking how to hardcode library paths into programs... $ac_c" 1>&6
hardcode_action=
if test -n "$hardcode_libdir_flag_spec" || \
   test -n "$runpath_var"; then

  # We can hardcode non-existant directories.
  if test "$hardcode_direct" != no && \
     test "$hardcode_minus_L" != no && \
     test "$hardcode_shlibpath_var" != no; then

    # Linking always hardcodes the temporary library directory.
    hardcode_action=relink
  else
    # We can link without hardcoding, and we can hardcode nonexisting dirs.
    hardcode_action=immediate
  fi
else
  # We cannot hardcode anything, or else we can only hardcode existing
  # directories.
  hardcode_action=unsupported
fi
echo "$ac_t$hardcode_action" 1>&6


reload_flag=
reload_cmds='$LD$reload_flag -o $output$reload_objs'
echo $ac_n "checking for $LD option to reload object files... $ac_c" 1>&6
# PORTME Some linkers may need a different reload flag.
reload_flag='-r'
echo "$ac_t$reload_flag" 1>&6
test -n "$reload_flag" && reload_flag=" $reload_flag"

# PORTME Fill in your ld.so characteristics
library_names_spec=
libname_spec='lib$name'
soname_spec=
postinstall_cmds=
postuninstall_cmds=
finish_cmds=
finish_eval=
shlibpath_var=
version_type=none
dynamic_linker="$host_os ld.so"

echo $ac_n "checking dynamic linker characteristics... $ac_c" 1>&6
case "$host_os" in
aix3* | aix4*)
  version_type=linux
  library_names_spec='${libname}${release}.so$versuffix $libname.a'
  shlibpath_var=LIBPATH

  # AIX has no versioning support, so we append a major version to the name.
  soname_spec='${libname}${release}.so$major'
  ;;

amigaos*)
  library_names_spec='$libname.ixlibrary $libname.a'
  # Create ${libname}_ixlibrary.a entries in /sys/libs.
  finish_eval='for lib in `ls $libdir/*.ixlibrary 2>/dev/null`; do libname=`$echo "X$lib" | $Xsed -e '\''s%^.*/\([^/]*\)\.ixlibrary$%\1%'\''`; test $rm /sys/libs/${libname}_ixlibrary.a; $show "(cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a)"; (cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a) || exit 1; done'
  ;;

cygwin32* | mingw32*)
  version_type=windows
  if test "$with_gcc" = yes; then
    library_names_spec='${libname}`echo ${release} | sed -e 's/[.]/-/g'`${versuffix}.dll $libname.a'
  else
    library_names_spec='${libname}`echo ${release} | sed -e 's/[.]/-/g'`${versuffix}.dll $libname.lib'
  fi
  dynamic_linker='Win32 ld.exe'
  shlibpath_var=PATH
  ;;

freebsd2* | freebsd3*)
  version_type=sunos
  library_names_spec='${libname}${release}.so$versuffix $libname.so'
  finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
  shlibpath_var=LD_LIBRARY_PATH
  ;;

gnu*)
  version_type=linux
  library_names_spec='${libname}${release}.so$versuffix ${libname}.so'
  shlibpath_var=LD_LIBRARY_PATH
  ;;

hpux9* | hpux10* | hpux11*)
  # Give a soname corresponding to the major version so that dld.sl refuses to
  # link against other versions.
  dynamic_linker="$host_os dld.sl"
  version_type=sunos
  shlibpath_var=SHLIB_PATH
  library_names_spec='${libname}${release}.sl$versuffix ${libname}${release}.sl$major $libname.sl'
  soname_spec='${libname}${release}.sl$major'
  # HP-UX runs *really* slowly unless shared libraries are mode 555.
  postinstall_cmds='chmod 555 $lib'
  ;;

irix5* | irix6*)
  version_type=osf
  soname_spec='${libname}${release}.so'
  library_names_spec='${libname}${release}.so$versuffix $libname.so'
  shlibpath_var=LD_LIBRARY_PATH
  ;;

# No shared lib support for Linux oldld, aout, or coff.
linux-gnuoldld* | linux-gnuaout* | linux-gnucoff*)
  dynamic_linker=no
  ;;

# This must be Linux ELF.
linux-gnu*)
  version_type=linux
  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
  soname_spec='${libname}${release}.so$major'
  finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir'
  shlibpath_var=LD_LIBRARY_PATH

  if test -f /lib/ld.so.1; then
    dynamic_linker='GNU ld.so'
  else
    # Only the GNU ld.so supports shared libraries on MkLinux.
    case "$host_cpu" in
    powerpc*) dynamic_linker=no ;;
    *) dynamic_linker='Linux ld.so' ;;
    esac
  fi
  ;;

netbsd* | openbsd*)
  version_type=sunos
  library_names_spec='${libname}${release}.so$versuffix'
  finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
  shlibpath_var=LD_LIBRARY_PATH
  ;;

os2*)
  libname_spec='$name'
  library_names_spec='$libname.dll $libname.a'
  dynamic_linker='OS/2 ld.exe'
  shlibpath_var=LIBPATH
  ;;

osf3* | osf4*)
  version_type=osf
  soname_spec='${libname}${release}.so'
  library_names_spec='${libname}${release}.so$versuffix $libname.so'
  shlibpath_var=LD_LIBRARY_PATH
  ;;

sco3.2v5*)
  version_type=osf
  soname_spec='${libname}${release}.so$major'
  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
  shlibpath_var=LD_LIBRARY_PATH
  ;;

solaris2*)
  version_type=linux
  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
  soname_spec='${libname}${release}.so$major'
  shlibpath_var=LD_LIBRARY_PATH
  # ldd complains unless libraries are executable
  postinstall_cmds='chmod +x $lib'
  ;;

sunos4*)
  version_type=sunos
  library_names_spec='${libname}${release}.so$versuffix ${libname}.so$versuffix'
  finish_cmds='PATH="\$PATH:/usr/etc" ldconfig $libdir'
  shlibpath_var=LD_LIBRARY_PATH
  ;;

sysv4.2uw2*)
  version_type=linux
  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
  soname_spec='${libname}${release}.so$major'
  shlibpath_var=LD_LIBRARY_PATH
  ;;

uts4*)
  version_type=linux
  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
  soname_spec='${libname}${release}.so$major'
  shlibpath_var=LD_LIBRARY_PATH
  ;;

*)
  dynamic_linker=no
  ;;
esac
echo "$ac_t$dynamic_linker"
test "$dynamic_linker" = no && can_build_shared=no

# Report the final consequences.
echo "checking if libtool supports shared libraries... $can_build_shared" 1>&6

echo $ac_n "checking whether to build shared libraries... $ac_c" 1>&6
test "$can_build_shared" = "no" && enable_shared=no

# On AIX, shared libraries and static libraries use the same namespace, and
# are all built from PIC.
case "$host_os" in
aix*)
  test "$enable_shared" = yes && enable_static=no
  if test -n "$RANLIB"; then
    archive_cmds="$archive_cmds;\$RANLIB \$lib"
    postinstall_cmds='$RANLIB $lib'
  fi
  ;;
esac

echo "$ac_t$enable_shared" 1>&6

# Make sure either enable_shared or enable_static is yes.
test "$enable_shared" = yes || enable_static=yes

echo "checking whether to build static libraries... $enable_static" 1>&6

echo $ac_n "checking for objdir... $ac_c" 1>&6
rm -f .libs 2>/dev/null
mkdir .libs 2>/dev/null
if test -d .libs; then
  objdir=.libs
else
  # MS-DOS does not allow filenames that begin with a dot.
  objdir=_libs
fi
rmdir .libs 2>/dev/null
echo "$ac_t$objdir" 1>&6

# Copy echo and quote the copy, instead of the original, because it is
# used later.
ltecho="$echo"

# Now quote all the things that may contain metacharacters.
for var in ltecho old_CC old_CFLAGS old_CPPFLAGS old_LD old_NM old_RANLIB \
  old_LN_S old_DLLTOOL old_AS AR CC LD LN_S NM DLLTOOL AS reload_flag \
  reload_cmds wl pic_flag link_static_flag no_builtin_flag \
  export_dynamic_flag_spec whole_archive_flag_spec libname_spec \
  library_names_spec soname_spec RANLIB \
  old_archive_cmds old_archive_from_new_cmds old_postinstall_cmds \
  old_postuninstall_cmds archive_cmds postinstall_cmds postuninstall_cmds \
  allow_undefined_flag no_undefined_flag objext libext \
  finish_cmds finish_eval global_symbol_pipe fix_srcfile_path \
  hardcode_libdir_flag_spec hardcode_libdir_separator; do

  case "$var" in
  reload_cmds | old_archive_cmds | old_archive_from_new_cmds | \
  old_postinstall_cmds | old_postuninstall_cmds | archive_cmds | \
  postinstall_cmds | postuninstall_cmds | finish_cmds)
    # Double-quote double-evaled strings.
    eval "$var=\`\$echo \"X\$$var\" | \$Xsed -e \"\$double_quote_subst\" -e \"\$sed_quote_subst\"\`"
    ;;
  *)
    eval "$var=\`\$echo \"X\$$var\" | \$Xsed -e \"\$sed_quote_subst\"\`"
    ;;
  esac
done

trap "$rm \"$ofile\"; exit 1" 1 2 15
echo "creating $ofile"
$rm "$ofile"
cat <<EOF > "$ofile"
#! $SHELL

# `$echo "$ofile" | sed 's%^.*/%%'` - Provide generalized library-building support services.
# Generated automatically by $PROGRAM - GNU $PACKAGE $VERSION
# NOTE: Changes made to this file will be lost: look at ltconfig or ltmain.sh.
#
# Copyright (C) 1996-1998 Free Software Foundation, Inc.
# Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# As a special exception to the GNU General Public License, if you
# distribute this file as part of a program that contains a
# configuration script generated by Autoconf, you may include it under
# the same distribution terms that you use for the rest of that program.

# Sed that helps us avoid accidentally triggering echo(1) options like -n.
Xsed="sed -e s/^X//"

# The HP-UX ksh and POSIX shell print the target directory to stdout
# if CDPATH is set.
if test "\${CDPATH+set}" = set; then CDPATH=; export CDPATH; fi

### BEGIN LIBTOOL CONFIG
# Libtool was configured as follows, on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
#
# CC="$old_CC" CFLAGS="$old_CFLAGS" CPPFLAGS="$old_CPPFLAGS" \\
# LD="$old_LD" NM="$old_NM" RANLIB="$old_RANLIB" LN_S="$old_LN_S" \\
# DLLTOOL="$old_DLLTOOL" AS="$old_AS" \\
#   $0$ltconfig_args
#
# Compiler and other test output produced by $progname, useful for
# debugging $progname, is in ./config.log if it exists.

# The version of $progname that generated this script.
LTCONFIG_VERSION="$VERSION"

# Shell to use when invoking shell scripts.
SHELL="$SHELL"

# Whether or not to build shared libraries.
build_libtool_libs=$enable_shared

# Whether or not to build static libraries.
build_old_libs=$enable_static

# The host system.
host_alias="$host_alias"
host="$host"

# An echo program that does not interpret backslashes.
echo="$ltecho"

# The archiver.
AR="$AR"

# The default C compiler.
CC="$CC"

# The linker used to build libraries.
LD="$LD"

# Whether we need hard or soft links.
LN_S="$LN_S"

# A BSD-compatible nm program.
NM="$NM"

# Used on cygwin32: DLL creation program.
DLLTOOL="$DLLTOOL"

# Used on cygwin32: assembler.
AS="$AS"

# The name of the directory that contains temporary libtool files.
objdir="$objdir"

# How to create reloadable object files.
reload_flag="$reload_flag"
reload_cmds="$reload_cmds"

# How to pass a linker flag through the compiler.
wl="$wl"

# Object file suffix (normally "o").
objext="$objext"

# Old archive suffix (normally "a").
libext="$libext"

# Additional compiler flags for building library objects.
pic_flag="$pic_flag"

# Compiler flag to prevent dynamic linking.
link_static_flag="$link_static_flag"

# Compiler flag to turn off builtin functions.
no_builtin_flag="$no_builtin_flag"

# Compiler flag to allow reflexive dlopens.
export_dynamic_flag_spec="$export_dynamic_flag_spec"

# Compiler flag to generate shared objects directly from archives.
whole_archive_flag_spec="$whole_archive_flag_spec"

# Library versioning type.
version_type=$version_type

# Format of library name prefix.
libname_spec="$libname_spec"

# List of archive names.  First name is the real one, the rest are links.
# The last name is the one that the linker finds with -lNAME.
library_names_spec="$library_names_spec"

# The coded name of the library, if different from the real name.
soname_spec="$soname_spec"

# Commands used to build and install an old-style archive.
RANLIB="$RANLIB"
old_archive_cmds="$old_archive_cmds"
old_postinstall_cmds="$old_postinstall_cmds"
old_postuninstall_cmds="$old_postuninstall_cmds"

# Create an old-style archive from a shared archive.
old_archive_from_new_cmds="$old_archive_from_new_cmds"

# Commands used to build and install a shared archive.
archive_cmds="$archive_cmds"
postinstall_cmds="$postinstall_cmds"
postuninstall_cmds="$postuninstall_cmds"

# Flag that allows shared libraries with undefined symbols to be built.
allow_undefined_flag="$allow_undefined_flag"

# Flag that forces no undefined symbols.
no_undefined_flag="$no_undefined_flag"

# Commands used to finish a libtool library installation in a directory.
finish_cmds="$finish_cmds"

# Same as above, but a single script fragment to be evaled but not shown.
finish_eval="$finish_eval"

# Take the output of nm and produce a listing of raw symbols and C names.
global_symbol_pipe="$global_symbol_pipe"

# This is the shared library runtime path variable.
runpath_var=$runpath_var

# This is the shared library path variable.
shlibpath_var=$shlibpath_var

# How to hardcode a shared library path into an executable.
hardcode_action=$hardcode_action

# Flag to hardcode \$libdir into a binary during linking.
# This must work even if \$libdir does not exist.
hardcode_libdir_flag_spec="$hardcode_libdir_flag_spec"

# Whether we need a single -rpath flag with a separated argument.
hardcode_libdir_separator="$hardcode_libdir_separator"

# Set to yes if using DIR/libNAME.so during linking hardcodes DIR into the
# resulting binary.
hardcode_direct=$hardcode_direct

# Set to yes if using the -LDIR flag during linking hardcodes DIR into the
# resulting binary.
hardcode_minus_L=$hardcode_minus_L

# Set to yes if using SHLIBPATH_VAR=DIR during linking hardcodes DIR into
# the resulting binary.
hardcode_shlibpath_var=$hardcode_shlibpath_var

# Fix the shell variable \$srcfile for the compiler.
fix_srcfile_path="$fix_srcfile_path"
EOF

case "$host_os" in
aix3*)
  cat <<\EOF >> "$ofile"

# AIX sometimes has problems with the GCC collect2 program.  For some
# reason, if we set the COLLECT_NAMES environment variable, the problems
# vanish in a puff of smoke.
if test "${COLLECT_NAMES+set}" != set; then
  COLLECT_NAMES=
  export COLLECT_NAMES
fi
EOF
  ;;
esac

echo '### END LIBTOOL CONFIG' >> "$ofile"
echo >> "$ofile"

# Append the ltmain.sh script.
cat "$ltmain" >> "$ofile" || (rm -f "$ofile"; exit 1)

chmod +x "$ofile"
exit 0

# Local Variables:
# mode:shell-script
# sh-indentation:2
# End: