ltmain.sh

PPP协议的实现演示

	  done
	  tmp_libs=
	  for deplib in $new_libs; do
	    case "$deplib" in
	    -L*)
	      case " $tmp_libs " in
	      *" $deplib "*) ;;
	      *) tmp_libs="$tmp_libs $deplib" ;;
	      esac
	      ;;
	    *) tmp_libs="$tmp_libs $deplib" ;;
	    esac
	  done
	  eval $var=\"$tmp_libs\"
	done
      fi
    done
    if test $linkmode = prog; then
      dlfiles="$newdlfiles"
      dlprefiles="$newdlprefiles"
    fi

    case $linkmode in
    oldlib)
      if test -n "$deplibs"; then
	$echo "$modename: warning: \`-l' and \`-L' are ignored for archives" 1>&2
      fi

      if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then
	$echo "$modename: warning: \`-dlopen' is ignored for archives" 1>&2
      fi

      if test -n "$rpath"; then
	$echo "$modename: warning: \`-rpath' is ignored for archives" 1>&2
      fi

      if test -n "$xrpath"; then
	$echo "$modename: warning: \`-R' is ignored for archives" 1>&2
      fi

      if test -n "$vinfo"; then
	$echo "$modename: warning: \`-version-info' is ignored for archives" 1>&2
      fi

      if test -n "$release"; then
	$echo "$modename: warning: \`-release' is ignored for archives" 1>&2
      fi

      if test -n "$export_symbols" || test -n "$export_symbols_regex"; then
	$echo "$modename: warning: \`-export-symbols' is ignored for archives" 1>&2
      fi

      # Now set the variables for building old libraries.
      build_libtool_libs=no
      oldlibs="$output"
      objs="$objs$old_deplibs"
      ;;

    lib)
      # Make sure we only generate libraries of the form `libNAME.la'.
      case "$outputname" in
      lib*)
	name=`$echo "X$outputname" | $Xsed -e 's/\.la$//' -e 's/^lib//'`
	eval libname=\"$libname_spec\"
	;;
      *)
	if test "$module" = no; then
	  $echo "$modename: libtool library \`$output' must begin with \`lib'" 1>&2
	  $echo "$help" 1>&2
	  exit 1
	fi
	if test "$need_lib_prefix" != no; then
	  # Add the "lib" prefix for modules if required
	  name=`$echo "X$outputname" | $Xsed -e 's/\.la$//'`
	  eval libname=\"$libname_spec\"
	else
	  libname=`$echo "X$outputname" | $Xsed -e 's/\.la$//'`
	fi
	;;
      esac

      if test -n "$objs"; then
	if test "$deplibs_check_method" != pass_all; then
	  $echo "$modename: cannot build libtool library \`$output' from non-libtool objects on this host:$objs" 2>&1
	  exit 1
	else
	  echo
	  echo "*** Warning: Linking the shared library $output against the non-libtool"
	  echo "*** objects $objs is not portable!"
	  libobjs="$libobjs $objs"
	fi
      fi

      if test "$dlself" != no; then
	$echo "$modename: warning: \`-dlopen self' is ignored for libtool libraries" 1>&2
      fi

      set dummy $rpath
      if test $# -gt 2; then
	$echo "$modename: warning: ignoring multiple \`-rpath's for a libtool library" 1>&2
      fi
      install_libdir="$2"

      oldlibs=
      if test -z "$rpath"; then
	if test "$build_libtool_libs" = yes; then
	  # Building a libtool convenience library.
	  libext=al
	  oldlibs="$output_objdir/$libname.$libext $oldlibs"
	  build_libtool_libs=convenience
	  build_old_libs=yes
	fi

	if test -n "$vinfo"; then
	  $echo "$modename: warning: \`-version-info' is ignored for convenience libraries" 1>&2
	fi

	if test -n "$release"; then
	  $echo "$modename: warning: \`-release' is ignored for convenience libraries" 1>&2
	fi
      else

	# Parse the version information argument.
	IFS="${IFS= 	}"; save_ifs="$IFS"; IFS=':'
	set dummy $vinfo 0 0 0
	IFS="$save_ifs"

	if test -n "$8"; then
	  $echo "$modename: too many parameters to \`-version-info'" 1>&2
	  $echo "$help" 1>&2
	  exit 1
	fi

	current="$2"
	revision="$3"
	age="$4"

	# Check that each of the things are valid numbers.
	case "$current" in
	0 | [1-9] | [1-9][0-9]*) ;;
	*)
	  $echo "$modename: CURRENT \`$current' is not a nonnegative integer" 1>&2
	  $echo "$modename: \`$vinfo' is not valid version information" 1>&2
	  exit 1
	  ;;
	esac

	case "$revision" in
	0 | [1-9] | [1-9][0-9]*) ;;
	*)
	  $echo "$modename: REVISION \`$revision' is not a nonnegative integer" 1>&2
	  $echo "$modename: \`$vinfo' is not valid version information" 1>&2
	  exit 1
	  ;;
	esac

	case "$age" in
	0 | [1-9] | [1-9][0-9]*) ;;
	*)
	  $echo "$modename: AGE \`$age' is not a nonnegative integer" 1>&2
	  $echo "$modename: \`$vinfo' is not valid version information" 1>&2
	  exit 1
	  ;;
	esac

	if test $age -gt $current; then
	  $echo "$modename: AGE \`$age' is greater than the current interface number \`$current'" 1>&2
	  $echo "$modename: \`$vinfo' is not valid version information" 1>&2
	  exit 1
	fi

	# Calculate the version variables.
	major=
	versuffix=
	verstring=
	case "$version_type" in
	none) ;;

	irix)
	  major=`expr $current - $age + 1`
	  versuffix="$major.$revision"
	  verstring="sgi$major.$revision"

	  # Add in all the interfaces that we are compatible with.
	  loop=$revision
	  while test $loop != 0; do
	    iface=`expr $revision - $loop`
	    loop=`expr $loop - 1`
	    verstring="sgi$major.$iface:$verstring"
	  done
	  ;;

	linux)
	  major=.`expr $current - $age`
	  versuffix="$major.$age.$revision"
	  ;;

	osf)
	  major=`expr $current - $age`
	  versuffix=".$current.$age.$revision"
	  verstring="$current.$age.$revision"

	  # Add in all the interfaces that we are compatible with.
	  loop=$age
	  while test $loop != 0; do
	    iface=`expr $current - $loop`
	    loop=`expr $loop - 1`
	    verstring="$verstring:${iface}.0"
	  done

	  # Make executables depend on our current version.
	  verstring="$verstring:${current}.0"
	  ;;

	sunos)
	  major=".$current"
	  versuffix=".$current.$revision"
	  ;;

	freebsd-aout)
	  major=".$current"
	  versuffix=".$current.$revision";
	  ;;

	freebsd-elf)
	  major=".$current"
	  versuffix=".$current";
	  ;;

	windows)
	  # Like Linux, but with '-' rather than '.', since we only
	  # want one extension on Windows 95.
	  major=`expr $current - $age`
	  versuffix="-$major-$age-$revision"
	  ;;

	*)
	  $echo "$modename: unknown library version type \`$version_type'" 1>&2
	  echo "Fatal configuration error.  See the $PACKAGE docs for more information." 1>&2
	  exit 1
	  ;;
	esac

	# Clear the version info if we defaulted, and they specified a release.
	if test -z "$vinfo" && test -n "$release"; then
	  major=
	  verstring="0.0"
	  if test "$need_version" = no; then
	    versuffix=
	  else
	    versuffix=".0.0"
	  fi
	fi

	# Remove version info from name if versioning should be avoided
	if test "$avoid_version" = yes && test "$need_version" = no; then
	  major=
	  versuffix=
	  verstring=""
	fi

	# Check to see if the archive will have undefined symbols.
	if test "$allow_undefined" = yes; then
	  if test "$allow_undefined_flag" = unsupported; then
	    $echo "$modename: warning: undefined symbols not allowed in $host shared libraries" 1>&2
	    build_libtool_libs=no
	    build_old_libs=yes
	  fi
	else
	  # Don't allow undefined symbols.
	  allow_undefined_flag="$no_undefined_flag"
	fi
      fi

      if test "$mode" != relink; then
	# Remove our outputs.
	$show "${rm}r $output_objdir/$outputname $output_objdir/$libname.* $output_objdir/${libname}${release}.*"
	$run ${rm}r $output_objdir/$outputname $output_objdir/$libname.* $output_objdir/${libname}${release}.*
      fi

      # Now set the variables for building old libraries.
      if test "$build_old_libs" = yes && test "$build_libtool_libs" != convenience ; then
	oldlibs="$oldlibs $output_objdir/$libname.$libext"

	# Transform .lo files to .o files.
	oldobjs="$objs "`$echo "X$libobjs" | $SP2NL | $Xsed -e '/\.'${libext}'$/d' -e "$lo2o" | $NL2SP`
      fi

      # Eliminate all temporary directories.
      for path in $uninst_path; do
	lib_search_path=`echo "$lib_search_path " | sed -e 's% $path % %g'`
	deplibs=`echo "$deplibs " | sed -e 's% -L$path % %g'`
	dependency_libs=`echo "$dependency_libs " | sed -e 's% -L$path % %g'`
      done

      if test -n "$xrpath"; then
	# If the user specified any rpath flags, then add them.
	temp_xrpath=
	for libdir in $xrpath; do
	  temp_xrpath="$temp_xrpath -R$libdir"
	  case "$finalize_rpath " in
	  *" $libdir "*) ;;
	  *) finalize_rpath="$finalize_rpath $libdir" ;;
	  esac
	done
	if test "$hardcode_into_libs" = no || test $build_old_libs = yes; then
	  dependency_libs="$temp_xrpath $dependency_libs"
	fi
      fi

      # Make sure dlfiles contains only unique files that won't be dlpreopened
      old_dlfiles="$dlfiles"
      dlfiles=
      for lib in $old_dlfiles; do
	case " $dlprefiles $dlfiles " in
	*" $lib "*) ;;
	*) dlfiles="$dlfiles $lib" ;;
	esac
      done

      # Make sure dlprefiles contains only unique files
      old_dlprefiles="$dlprefiles"
      dlprefiles=
      for lib in $old_dlprefiles; do
	case "$dlprefiles " in
	*" $lib "*) ;;
	*) dlprefiles="$dlprefiles $lib" ;;
	esac
      done

      if test "$build_libtool_libs" = yes; then
	if test -n "$rpath"; then
	  case "$host" in
	  *-*-cygwin* | *-*-mingw* | *-*-os2* | *-*-beos*)
	    # these systems don't actually have a c library (as such)!
	    ;;
	  *)
	    # Add libc to deplibs on all other systems.
	    deplibs="$deplibs -lc"
	    ;;
	  esac
	fi

	# Transform deplibs into only deplibs that can be linked in shared.
	name_save=$name
	libname_save=$libname
	release_save=$release
	versuffix_save=$versuffix
	major_save=$major
	# I'm not sure if I'm treating the release correctly.  I think
	# release should show up in the -l (ie -lgmp5) so we don't want to
	# add it in twice.  Is that correct?
	release=""
	versuffix=""
	major=""
	newdeplibs=
	droppeddeps=no
	case "$deplibs_check_method" in
	pass_all)
	  # Don't check for shared/static.  Everything works.
	  # This might be a little naive.  We might want to check
	  # whether the library exists or not.  But this is on
	  # osf3 & osf4 and I'm not really sure... Just
	  # implementing what was already the behaviour.
	  newdeplibs=$deplibs
	  ;;
	test_compile)
	  # This code stresses the "libraries are programs" paradigm to its
	  # limits. Maybe even breaks it.  We compile a program, linking it
	  # against the deplibs as a proxy for the library.  Then we can check
	  # whether they linked in statically or dynamically with ldd.
	  $rm conftest.c
	  cat > conftest.c <<EOF
	  int main() { return 0; }
EOF
	  $rm conftest
	  $CC -o conftest conftest.c $deplibs
	  if test $? -eq 0 ; then
	    ldd_output=`ldd conftest`
	    for i in $deplibs; do
	      name="`expr $i : '-l\(.*\)'`"
	      # If $name is empty we are operating on a -L argument.
	      if test "$name" != "" ; then
		libname=`eval \\$echo \"$libname_spec\"`
		deplib_matches=`eval \\$echo \"$library_names_spec\"`
		set dummy $deplib_matches
		deplib_match=$2
		if test `expr "$ldd_output" : ".*$deplib_match"` -ne 0 ; then
		  newdeplibs="$newdeplibs $i"
		else
		  droppeddeps=yes
		  echo
		  echo "*** Warning: This library needs some functionality provided by $i."
		  echo "*** I have the capability to make that library automatically link in when"
		  echo "*** you link to this library.  But I can only do this if you have a"
		  echo "*** shared version of the library, which you do not appear to have."
		fi
	      else
		newdeplibs="$newdeplibs $i"
	      fi
	    done
	  else
	    # Error occured in the first compile.  Let's try to salvage the situation:
	    # Compile a seperate program for each library.
	    for i in $deplibs; do
	      name="`expr $i : '-l\(.*\)'`"
	     # If $name is empty we are operating on a -L argument.
	      if test "$name" != "" ; then
		$rm conftest
		$CC -o conftest conftest.c $i
		# Did it work?
		if test $? -eq 0 ; then
		  ldd_output=`ldd conftest`
		  libname=`eval \\$echo \"$libname_spec\"`
		  deplib_matches=`eval \\$echo \"$library_names_spec\"`
		  set dummy $deplib_matches
		  deplib_match=$2
		  if test `expr "$ldd_output" : ".*$deplib_match"` -ne 0 ; then
		    newdeplibs="$newdeplibs $i"
		  else
		    droppeddeps=yes
		    echo
		    echo "*** Warning: This library needs some functionality provided by $i."
		    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."
		  fi
		else
		  droppeddeps=yes
		  echo
		  echo "*** Warning!  Library $i is needed by this library but I was not able to"
		  echo "***  make it link in!  You will probably need to install it or some"
		  echo "*** library that it depends on before this library will be fully"
		  echo "*** functional.  Installing it before continuing would be even better."
		fi
	      else
		newdeplibs="$newdeplibs $i"
	      fi
	    done
	  fi
	  ;;
	file_magic*)
	  set dummy $deplibs_check_method
	  file_magic_regex=`expr "$deplibs_check_method" : "$2 \(.*\)"`
	  for a_deplib in $deplibs; do
	    name="`expr $a_deplib : '-l\(.*\)'`"
	    # If $name is empty we are operating on a -L argument.
	    if test "$name" != "" ; then
	      libname=`eval \\$echo \"$libname_spec\"`
	      for i in $lib_search_path; do
		    potential_libs=`ls $i/$libname[.-]* 2>/dev/null`
		    for potent_lib in $potential_libs; do
		      # Follow soft links.
		      if ls -lLd "$potent_lib" 2>/dev/null \
			 | grep " -> " >/dev/null; then
			continue
		      fi
		      # The statement above tries to avoid entering an
		      # endless loop below, in case of cyclic links.
		      # We might still enter an endless loop, since a link
		      # loop can be closed while we follow links,
		      # but so what?
		      potlib="$potent_lib"
		      while test -h "$potlib" 2>/dev/null; do
			potliblink=`ls -ld $potlib | sed 's/.* -> //'`
			case "$potliblink" in
			[\\/]* | [A-Za-z]:[\\/]*) potlib="$potliblink";;
			*) potlib=`$echo "X$potlib" | $Xsed -e 's,[^/]*$,,'`"$potliblink";;
			esac
		      done
		      if eval $file_magic_cmd \"\$potlib\" 2>/dev/null \
			 | sed 10q \
			 | egrep "$file_magic_regex" > /dev/null; then
			newdeplibs="$newdeplibs $a_deplib"
			a_deplib=""
			break 2
		      fi
		    done
	      done
	      if test -n "$a_deplib" ; then
		droppeddeps=yes
		echo
		echo "*** Warning: This library needs some functionality provided by $a_deplib."
		echo "*** I have the capability to make that library automatically link in when"
		echo "*** you link to this library.  But I can only do this if you have a"
		echo "*** shared version of the library, which you do not appear to have."
	      fi
	    else
	      # Add a -L argument.
	      newdeplibs="$newdeplibs $a_deplib"
	    fi
	  done # Gone through all deplibs.
	  ;;
	none | unknown | *)
	  newdeplibs=""
	  if $echo "X $deplibs" | $Xsed -e