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
  $rm conftest*
  echo > conftest.c
  save_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS $pic_flag -DPIC"
  echo "$progname:547: checking if $compiler PIC flag $pic_flag works" >&5
  if { (eval echo $progname:548: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>conftest.err; } && test -s conftest.o; 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:591: checking if $compiler static flag $link_static_flag works" >&5
if { (eval echo $progname:592: \"$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:624: 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:642: checking for GNU ld" >&5
  else
    echo $ac_n "checking for non-GNU ld""... $ac_c" 1>&6
    echo "$progname:645: 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=
hardcode_libdir_flag_spec=
hardcode_libdir_separator=
hardcode_direct=no
hardcode_minus_L=no
hardcode_shlibpath_var=unsupported
runpath_var=

case "$host_os" in
amigaos* | sunos4*)
  # On these operating systems, we should treat GNU ld like the system ld.
  gnu_ld_acts_native=yes
  ;;
*)
  gnu_ld_acts_native=no
  ;;
esac

ld_shlibs=yes
if test "$with_gnu_ld" = yes && test "$gnu_ld_acts_native" != yes; then

  # See if GNU ld supports shared libraries.
  if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
    archive_cmds='$CC -shared ${wl}-soname $wl$soname -o $lib$libobjs'
    runpath_var=LD_RUN_PATH
    ld_shlibs=yes
  else
    ld_shlibs=no
  fi

  if test "$ld_shlibs" = yes; then
    hardcode_libdir_flag_spec='${wl}--rpath ${wl}$libdir'
    export_dynamic_flag_spec='${wl}--export-dynamic'
  fi
else
  # PORTME fill in a description of your system's linker (not GNU ld)
  case "$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
    ;;

  # 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=yes
    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*)
    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*)
    archive_cmds='$LD -shared -o $lib -soname $soname -set_version $verstring$libobjs'
    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*)
    if test "$with_gcc" = yes; then
      archive_cmds='$CC -shared -o $lib$libobjs'
    else
      archive_cmds='$LD -assert pure-text -Bstatic -o $lib$libobjs'
    fi

    if test "$with_gnu_ld" = yes; then
      export_dynamic_flag_spec='${wl}-export-dynamic'
    fi
    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]'
  ;;
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

# 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:971: checking if global_symbol_pipe works" >&5
if { (eval echo $progname:972: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; } && test -s conftest.o; then
  # Now try to grab the symbols.
  nlist=conftest.nm
  if { echo "$progname:975: eval \"$NM conftest.o | $global_symbol_pipe > $nlist\"" >&5; eval "$NM conftest.o | $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. */