libtool

PPP协议的实现演示

      # Now actually substitute the argument into the commands.
      if test -n "$arg"; then
	compile_command="$compile_command $arg"
	finalize_command="$finalize_command $arg"
      fi
    done

    if test -n "$prev"; then
      $echo "$modename: the \`$prevarg' option requires an argument" 1>&2
      $echo "$help" 1>&2
      exit 1
    fi

    if test "$export_dynamic" = yes && test -n "$export_dynamic_flag_spec"; then
      eval arg=\"$export_dynamic_flag_spec\"
      compile_command="$compile_command $arg"
      finalize_command="$finalize_command $arg"
    fi

    oldlibs=
    # calculate the name of the file, without its directory
    outputname=`$echo "X$output" | $Xsed -e 's%^.*/%%'`
    libobjs_save="$libobjs"

    if test -n "$shlibpath_var"; then
      # get the directories listed in $shlibpath_var
      eval shlib_search_path=\`\$echo \"X \${$shlibpath_var}\" \| \$Xsed -e \'s/:/ /g\'\`
    else
      shlib_search_path=
    fi
    eval sys_lib_search_path=\"$sys_lib_search_path_spec\"
    eval sys_lib_dlsearch_path=\"$sys_lib_dlsearch_path_spec\"
    lib_search_path="$lib_search_path $sys_lib_search_path $shlib_search_path"

    output_objdir=`$echo "X$output" | $Xsed -e 's%/[^/]*$%%'`
    if test "X$output_objdir" = "X$output"; then
      output_objdir="$objdir"
    else
      output_objdir="$output_objdir/$objdir"
    fi
    # Create the object directory.
    if test ! -d $output_objdir; then
      $show "$mkdir $output_objdir"
      $run $mkdir $output_objdir
      status=$?
      if test $status -ne 0 && test ! -d $output_objdir; then
	exit $status
      fi
    fi

    case "$output" in
    "")
      $echo "$modename: you must specify an output file" 1>&2
      $echo "$help" 1>&2
      exit 1
      ;;
    *.$libext)
      linkmode=oldlib ;;
    *.lo | *.$objext)
      linkmode=obj ;;
    *.la)
      linkmode=lib ;;
    *) # Anything else should be a program.
      linkmode=prog ;;
    esac

    specialdeplibs=
    libs=
    # Find all interdependent deplibs that
    # are linked more than once (e.g. -la -lb -la)
    for deplib in $deplibs; do
      case "$libs " in
      *" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;;
      esac
      libs="$libs $deplib"
    done
    deplibs=
    newdependency_libs=
    uninst_path= # paths that contain uninstalled libtool libraries
    new_lib_search_path=
    need_relink=no # whether we're linking any uninstalled libtool libraries
    case $linkmode in
    lib)
	passes="link"
	for file in $dlfiles $dlprefiles; do
	  case "$file" in
	  *.la) ;;
	  *)
	    $echo "$modename: libraries can \`-dlopen' only libtool libraries" 1>&2
	    exit 1
	    ;;
	  esac
	done
	;;
    prog)
	compile_deplibs=
	finalize_deplibs=
	alldeplibs=no
	newdlfiles=
	newdlprefiles=
	link_against_libtool_libs=
	passes="scan dlopen dlpreopen link"
	;;
    *)	passes="link"
	;;
    esac
    for pass in $passes; do
      if test $linkmode = prog; then
	case $pass in
	dlopen) libs="$dlfiles" ;;
	dlpreopen) libs="$dlprefiles" ;;
	link) libs="$deplibs %DEPLIBS% $dependency_libs" ;;
	esac
      fi
      if test $pass = dlopen; then
	# Collect dlpreopened libraries
	save_deplibs="$deplibs"
	deplibs=
      fi
      for deplib in $libs; do
	lib=
	found=no
	case "$deplib" in
	-l*)
	  if test $linkmode != lib && test $linkmode != prog; then
	    $echo "$modename: warning: \`-l' is ignored for archives/objects" 1>&2
	    continue
	  fi
	  name=`$echo "X$deplib" | $Xsed -e 's/^-l//'`
	  for searchdir in $lib_search_path; do
	    # Search the libtool library
	    lib="$searchdir/lib${name}.la"
	    if test -f "$lib"; then
	      found=yes
	      break
	    fi
	  done
	  if test "$found" != yes; then
	    if test "$linkmode,$pass" = "prog,link"; then
	      compile_deplibs="$deplib $compile_deplibs"
	      finalize_deplibs="$deplib $finalize_deplibs"
	    else
	      deplibs="$deplib $deplibs"
	      test $linkmode = lib && newdependency_libs="$deplib $newdependency_libs"
	    fi
	    continue
	  fi
	  ;;
	-L*)
	  case $linkmode in
	  lib)
	    deplibs="$deplib $deplibs"
	    newdependency_libs="$deplib $newdependency_libs"
	    new_lib_search_path="$new_lib_search_path "`$echo "X$deplib" | $Xsed -e 's/^-L//'`
	    ;;
	  prog)
	    if test $pass = scan; then
	      deplibs="$deplib $deplibs"
	      new_lib_search_path="$new_lib_search_path "`$echo "X$deplib" | $Xsed -e 's/^-L//'`
	    else
	      compile_deplibs="$deplib $compile_deplibs"
	      finalize_deplibs="$deplib $finalize_deplibs"
	    fi
	    ;;
	  *)
	    $echo "$modename: warning: \`-L' is ignored for archives/objects" 1>&2
	    ;;
	  esac
	  continue
	  ;;
	-R*)
	  if test "$linkmode,$pass" = "prog,link"; then
	    dir=`$echo "X$deplib" | $Xsed -e 's/^-R//'`
	    # Make sure the xrpath contains only unique directories.
	    case "$xrpath " in
	    *" $dir "*) ;;
	    *) xrpath="$xrpath $dir" ;;
	    esac
	  fi
	  continue
	  ;;
	*.la) lib="$deplib" ;;
	*.$libext)
	  case $linkmode in
	  lib)
	    if test "$deplibs_check_method" != pass_all; then
	      echo
	      echo "*** Warning: This library needs some functionality provided by $deplib."
	      echo "*** I have the capability to make that library automatically link in when"
	      echo "*** you link to this library.  But I can only do this if you have a"
	      echo "*** shared version of the library, which you do not appear to have."
	    else
	      echo
	      echo "*** Warning: Linking the shared library $output against the"
	      echo "*** static library $deplib is not portable!"
	      deplibs="$deplib $deplibs"
	    fi
	    continue
	    ;;
	  prog)
	    if test $pass != link; then
	      deplibs="$deplib $deplibs"
	    else
	      compile_deplibs="$deplib $compile_deplibs"
	      finalize_deplibs="$deplib $finalize_deplibs"
	    fi
	    continue
	    ;;
	  esac
	  ;;
	*.lo | *.$objext)
	  if test $linkmode = prog; then
	    if test $pass = dlpreopen || test "$dlopen_support" != yes || test "$build_libtool_libs" = no; then
	      # If there is no dlopen support or we're linking statically,
	      # we need to preload.
	      newdlprefiles="$newdlprefiles $deplib"
	      compile_deplibs="$deplib $compile_deplibs"
	      finalize_deplibs="$deplib $finalize_deplibs"
	    else
	      newdlfiles="$newdlfiles $deplib"
	    fi
	  fi
	  continue
	  ;;
	%DEPLIBS%)
	  alldeplibs=yes
	  continue
	  ;;
	esac
	if test $found = yes || test -f "$lib"; then :
	else
	  $echo "$modename: cannot find the library \`$lib'" 1>&2
	  exit 1
	fi

	# Check to see that this really is a libtool archive.
	if (sed -e '2q' $lib | egrep "^# Generated by .*$PACKAGE") >/dev/null 2>&1; then :
	else
	  $echo "$modename: \`$lib' is not a valid libtool archive" 1>&2
	  exit 1
	fi

	ladir=`$echo "X$lib" | $Xsed -e 's%/[^/]*$%%'`
	test "X$ladir" = "X$lib" && ladir="."

	dlname=
	dlopen=
	dlpreopen=
	libdir=
	library_names=
	old_library=
	# If the library was installed with an old release of libtool,
	# it will not redefine variable installed.
	installed=yes

	# Read the .la file
	case "$lib" in
	*/* | *\\*) . $lib ;;
	*) . ./$lib ;;
	esac

	if test $linkmode = lib || test "$linkmode,$pass" = "prog,scan"; then
	  test -n "$dlopen" && dlfiles="$dlfiles $dlopen"
	  test -n "$dlpreopen" && dlprefiles="$dlprefiles $dlpreopen"
	fi

	if test $linkmode != lib && test $linkmode != prog; then
	  # only check for convenience libraries
	  if test -z "$old_library"; then
	    $echo "$modename: cannot find name of link library for \`$lib'" 1>&2
	    exit 1
	  fi
	  if test -n "$libdir"; then
	    $echo "$modename: \`$lib' is not a convenience library" 1>&2
	    exit 1
	  fi
	  # It is a libtool convenience library, so add in its objects.
	  convenience="$convenience $ladir/$objdir/$old_library"
	  old_convenience="$old_convenience $ladir/$objdir/$old_library"
	  continue
	fi

	# Get the name of the library we link against.
	linklib=
	for l in $old_library $library_names; do
	  linklib="$l"
	done
	if test -z "$linklib"; then
	  $echo "$modename: cannot find name of link library for \`$lib'" 1>&2
	  exit 1
	fi

	# This library was specified with -dlopen.
	if test $pass = dlopen; then
	  if test -z "$dlname" || test "$dlopen_support" != yes || test "$build_libtool_libs" = no; then
	    # If there is no dlname, no dlopen support or we're linking statically,
	    # we need to preload.
	    dlprefiles="$dlprefiles $lib"
	  else
	    newdlfiles="$newdlfiles $lib"
	  fi
	  continue
	fi

	# We need an absolute path.
	case "$ladir" in
	[\\/]* | [A-Za-z]:[\\/]*) abs_ladir="$ladir" ;;
	*)
	  abs_ladir=`cd "$ladir" && pwd`
	  if test -z "$abs_ladir"; then
	    $echo "$modename: warning: cannot determine absolute directory name of \`$ladir'" 1>&2
	    $echo "$modename: passing it literally to the linker, although it might fail" 1>&2
	    abs_ladir="$ladir"
	  fi
	  ;;
	esac
	laname=`$echo "X$lib" | $Xsed -e 's%^.*/%%'`

	# Find the relevant object directory and library name.
	if test "X$installed" = Xyes; then
	  if test ! -f "$libdir/$linklib" && test -f "$abs_ladir/$linklib"; then
	    $echo "$modename: warning: library \`$lib' was moved." 1>&2
	    dir="$ladir"
	    absdir="$abs_ladir"
	    libdir="$abs_ladir"
	  else
	    dir="$libdir"
	    absdir="$libdir"
	  fi
	else
	  dir="$ladir/$objdir"
	  absdir="$abs_ladir/$objdir"
	  # Remove this search path later
	  uninst_path="$uninst_path $abs_ladir"
	fi
	name=`$echo "X$laname" | $Xsed -e 's/\.la$//' -e 's/^lib//'`

	# This library was specified with -dlpreopen.
	if test $pass = dlpreopen; then
	  # Prefer using a static library (so that no silly _DYNAMIC symbols
	  # are required to link).
	  if test -n "$old_library"; then
	    newdlprefiles="$newdlprefiles $dir/$old_library"
	  else
	    newdlprefiles="$newdlprefiles $dir/$linklib"
	  fi
	fi

	if test $linkmode = prog && test $pass != link; then
	  new_lib_search_path="$new_lib_search_path $ladir"
	  deplibs="$lib $deplibs"

	  linkalldeplibs=no
	  if test "$link_all_deplibs" != no || test "$fast_install" != no || \
	     test "$build_libtool_libs" = no || test -z "$library_names"; then
	    linkalldeplibs=yes
	  fi

	  tmp_libs=
	  for deplib in $dependency_libs; do
	    case "$deplib" in
	    -L*) new_lib_search_path="$new_lib_search_path "`$echo "X$deplib" | $Xsed -e 's/^-L//'`;; ### testsuite: skip nested quoting test
	    esac
	    # Need to link against all dependency_libs?
	    if test $linkalldeplibs = yes; then
	      deplibs="$deplib $deplibs"
	    else
	      # Need to hardcode shared library paths
	      # or/and link against static libraries
	      newdependency_libs="$deplib $newdependency_libs"
	    fi
	    case "$tmp_libs " in
	    *" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;;
	    esac
	    tmp_libs="$tmp_libs $deplib"
	  done
	  continue
	fi

	if test -z "$libdir"; then
	  # It is a libtool convenience library, so add in its objects.
	  convenience="$convenience $dir/$old_library"
	  old_convenience="$old_convenience $dir/$old_library"
	  if test $linkmode = lib; then
	    deplibs="$dir/$old_library $deplibs"
	    tmp_libs=
	    for deplib in $dependency_libs; do
	      newdependency_libs="$deplib $newdependency_libs"
	      case "$tmp_libs " in
	      *" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;;
	      esac
	      tmp_libs="$tmp_libs $deplib"
	    done
	  elif test "$linkmode,$pass" = "prog,link"; then
	    compile_deplibs="$dir/$old_library $compile_deplibs"
	    finalize_deplibs="$dir/$old_library $finalize_deplibs"
	  fi
	  continue
	fi

	if test "$linkmode,$pass" = "prog,link"; then
	  if test -n "$library_names" &&
	     { test "$hardcode_into_libs" != all || test "$alldeplibs" != yes; } &&
	     { test "$prefer_static_libs" = no || test -z "$old_library"; }; then
	    # We need to hardcode the library path
	    if test -n "$shlibpath_var"; then
	      # Make sure the rpath contains only unique directories.
	      case "$temp_rpath " in
	      *" $dir "*) ;;
	      *" $absdir "*) ;;
	      *) temp_rpath="$temp_rpath $dir" ;;
	      esac
	    fi

	    # Hardcode the library path.
	    # Skip directories that are in the system default run-time
	    # search path.
	    case " $sys_lib_dlsearch_path " in
	    *" $absdir "*) ;;
	    *)
	      case "$compile_rpath " in
	      *" $absdir "*) ;;
	      *) compile_rpath="$compile_rpath $absdir"
	      esac
	      ;;
	    esac

	    case " $sys_lib_dlsearch_path " in
	    *" $libdir "*) ;;
	    *)
	      case "$finalize_rpath " in
	      *" $libdir "*) ;;
	      *) finalize_rpath="$finalize_rpath $libdir"
	      esac
	      ;;
	    esac
	  fi

	  if test "$alldeplibs" = yes &&
	     { test "$deplibs_check_method" = pass_all ||
	       { test "$build_libtool_libs" = yes &&
		 test -n "$library_names"; }; }; then
	    # Do we only need to link against static libraries?
	    continue
	  fi
	fi

	link_static=no # Whether this library is linked statically
	if test -n "$library_names" &&
	   { test "$prefer_static_libs" = no || test -z "$old_library"; }; then
	  link_against_libtool_libs="$link_against_libtool_libs $lib"
	  test "X$installed" = xno && need_relink=yes
	  # This is a shared library
	  if test $linkmode = lib && test "$hardcode_into_libs" = all; then
	    # Hardcode the library path.
	    # Skip directories that are in the system default run-time
	    # search path.
	    case " $sys_lib_dlsearch_path " in
	    *" $absdir "*) ;;
	    *)
	      case "$compile_rpath " in
	      *" $absdir "*) ;;
	      *) compile_rpath="$compile_rpath $absdir"
	      esac
	      ;;
	    esac
	    case " $sys_lib_dlsearch_path " in
	    *" $libdir "*) ;;
	    *)
	      case "$finalize_rpath " in
	      *" $libdir "*) ;;
	      *) finalize_rpath="$finalize_rpath $libdir"
	      esac
	      ;;
	    esac
	  fi

	  if test -n "$old_archive_from_expsyms_cmds"; then
	    # figure out the soname
	    set dummy $library_names
	    realname="$2"
	    shift; shift
	    libname=`eval \\$echo \"$libname_spec\"`
	    if test -n "$soname_spec"; then
	      eval soname=\"$soname_spec\"
	    else
	      soname="$realname"
	    fi

	    # Make a new name for the extract_expsyms_cmds to use
	    newlib="libimp-`echo $soname | sed 's/^lib//;s/\.dll$//'`.a"

	    # If the library has no export list, then create one now
	    if test -f "$output_objdir/$soname-def"; then :
	    else
	      $show "extracting exported symbol list from \`$soname'"
	      IFS="${IFS= 	}"; save_ifs="$IFS"; IFS='~'
	      eval cmds=\"$extract_expsyms_cmds\"
	      for cmd in $cmds; do
		IFS="$save_ifs"
		$show "$cmd"
		$run eval "$cmd" || exit $?