libtool/libltdl/config/general.m4sh

m4_if([general.m4sh -- general shell script boiler plate -*- Autoconf -*-

   Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
   Written by Gary V. Vaughan, 2004

   This file is part of GNU Cvs-utils.

GNU Cvs-utils 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 you option) any later version.

As a special exception to the GNU General Public License, if you
distribute this file as part of a program or library that contains
a configuration script generated by Autoconf, you may include this
file under the same distribution terms that you use for the rest
of that program.

GNU Cvs-utils is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNES 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 GNU Libtool; see the file COPYING.  If not, a copy
can be downloaded from  http://www.gnu.org/licenses/gpl.html,
or obtained by writing to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
])dnl

m4_define([M4SH_VERBATIM], [$1])dnl

m4_ifndef([M4SH_IN_HEADER],
[m4_define([M4SH_IN_HEADER],
[m4_divert_text([HEADER-COPYRIGHT], [$1])])])

M4SH_IN_HEADER([dnl
# Work around backward compatibility issue on IRIX 6.5. On IRIX 6.4+, sh
# is ksh but when the shell is invoked as "sh" and the current value of
# the _XPG environment variable is not equal to 1 (one), the special
# positional parameter $0, within a function call, is the name of the
# function.
progpath="$0"
])

M4SH_VERBATIM([[
: ${CP="cp -f"}
: ${ECHO=$as_echo}
: ${EGREP="@EGREP@"}
: ${FGREP="@FGREP@"}
: ${GREP="@GREP@"}
: ${LN_S="@LN_S@"}
: ${MAKE="make"}
: ${MKDIR="mkdir"}
: ${MV="mv -f"}
: ${RM="rm -f"}
: ${SED="@SED@"}
: ${SHELL="${CONFIG_SHELL-/bin/sh}"}
: ${Xsed="$SED -e 1s/^X//"}

# Global variables:
EXIT_SUCCESS=0
EXIT_FAILURE=1
EXIT_MISMATCH=63  # $? = 63 is used to indicate version mismatch to missing.
EXIT_SKIP=77	  # $? = 77 is used to indicate a skipped test to automake.

exit_status=$EXIT_SUCCESS

# Make sure IFS has a sensible default
lt_nl='
'
IFS=" 	$lt_nl"

dirname="s,/[^/]*$,,"
basename="s,^.*/,,"

# func_dirname_and_basename file append nondir_replacement
# perform func_basename and func_dirname in a single function
# call:
#   dirname:  Compute the dirname of FILE.  If nonempty,
#             add APPEND to the result, otherwise set result
#             to NONDIR_REPLACEMENT.
#             value returned in "$func_dirname_result"
#   basename: Compute filename of FILE.
#             value retuned in "$func_basename_result"
# Implementation must be kept synchronized with func_dirname
# and func_basename. For efficiency, we do not delegate to
# those functions but instead duplicate the functionality here.
func_dirname_and_basename ()
{
  # Extract subdirectory from the argument.
  func_dirname_result=`$ECHO "X${1}" | $Xsed -e "$dirname"`
  if test "X$func_dirname_result" = "X${1}"; then
    func_dirname_result="${3}"
  else
    func_dirname_result="$func_dirname_result${2}"
  fi
  func_basename_result=`$ECHO "X${1}" | $Xsed -e "$basename"`
}

# Generated shell functions inserted here.

# The name of this program:
# In the unlikely event $progname began with a '-', it would play havoc with
# func_echo (imagine progname=-n), so we prepend ./ in that case:
func_dirname_and_basename "$progpath"
progname=$func_basename_result
case $progname in
  -*) progname=./$progname ;;
esac

# Make sure we have an absolute path for reexecution:
case $progpath in
  [\\/]*|[A-Za-z]:\\*) ;;
  *[\\/]*)
     progdir=$func_dirname_result
     progdir=`cd "$progdir" && pwd`
     progpath="$progdir/$progname"
     ;;
  *)
     save_IFS="$IFS"
     IFS=:
     for progdir in $PATH; do
       IFS="$save_IFS"
       test -x "$progdir/$progname" && break
     done
     IFS="$save_IFS"
     test -n "$progdir" || progdir=`pwd`
     progpath="$progdir/$progname"
     ;;
esac

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

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

# Re-`\' parameter expansions in output of double_quote_subst that were
# `\'-ed in input to the same.  If an odd number of `\' preceded a '$'
# in input to double_quote_subst, that '$' was protected from expansion.
# Since each input `\' is now two `\'s, look for any number of runs of
# four `\'s followed by two `\'s and then a '$'.  `\' that '$'.
bs='\\'
bs2='\\\\'
bs4='\\\\\\\\'
dollar='\$'
sed_double_backslash="\
  s/$bs4/&\\
/g
  s/^$bs2$dollar/$bs&/
  s/\\([^$bs]\\)$bs2$dollar/\\1$bs2$bs$dollar/g
  s/\n//g"

# Standard options:
opt_dry_run=false
opt_help=false
opt_quiet=false
opt_verbose=false
opt_warning=:

# func_echo arg...
# Echo program name prefixed message, along with the current mode
# name if it has been set yet.
func_echo ()
{
    $ECHO "$progname${mode+: }$mode: $*"
}

# func_verbose arg...
# Echo program name prefixed message in verbose mode only.
func_verbose ()
{
    $opt_verbose && func_echo ${1+"$@"}

    # A bug in bash halts the script if the last line of a function
    # fails when set -e is in force, so we need another command to
    # work around that:
    :
}

# func_error arg...
# Echo program name prefixed message to standard error.
func_error ()
{
    $ECHO "$progname${mode+: }$mode: "${1+"$@"} 1>&2
}

# func_warning arg...
# Echo program name prefixed warning message to standard error.
func_warning ()
{
    $opt_warning && $ECHO "$progname${mode+: }$mode: warning: "${1+"$@"} 1>&2

    # bash bug again:
    :
}

# func_fatal_error arg...
# Echo program name prefixed message to standard error, and exit.
func_fatal_error ()
{
    func_error ${1+"$@"}
    exit $EXIT_FAILURE
}

# func_fatal_help arg...
# Echo program name prefixed message to standard error, followed by
# a help hint, and exit.
func_fatal_help ()
{
    func_error ${1+"$@"}
    func_fatal_error "$help"
}
help="Try \`$progname --help' for more information."  ## default


# func_grep expression filename
# Check whether EXPRESSION matches any line of FILENAME, without output.
func_grep ()
{
    $GREP "$1" "$2" >/dev/null 2>&1
}


# func_mkdir_p directory-path
# Make sure the entire path to DIRECTORY-PATH is available.
func_mkdir_p ()
{
    my_directory_path="$1"
    my_dir_list=

    if test -n "$my_directory_path" && test "$opt_dry_run" != ":"; then

      # Protect directory names starting with `-'
      case $my_directory_path in
        -*) my_directory_path="./$my_directory_path" ;;
      esac

      # While some portion of DIR does not yet exist...
      while test ! -d "$my_directory_path"; do
        # ...make a list in topmost first order.  Use a colon delimited
	# list incase some portion of path contains whitespace.
        my_dir_list="$my_directory_path:$my_dir_list"

        # If the last portion added has no slash in it, the list is done
        case $my_directory_path in */*) ;; *) break ;; esac

        # ...otherwise throw away the child directory and loop
        my_directory_path=`$ECHO "X$my_directory_path" | $Xsed -e "$dirname"`
      done
      my_dir_list=`$ECHO "X$my_dir_list" | $Xsed -e 's,:*$,,'`

      save_mkdir_p_IFS="$IFS"; IFS=':'
      for my_dir in $my_dir_list; do
	IFS="$save_mkdir_p_IFS"
        # mkdir can fail with a `File exist' error if two processes
        # try to create one of the directories concurrently.  Don't
        # stop in that case!
        $MKDIR "$my_dir" 2>/dev/null || :
      done
      IFS="$save_mkdir_p_IFS"

      # Bail out if we (or some other process) failed to create a directory.
      test -d "$my_directory_path" || \
        func_fatal_error "Failed to create \`$1'"
    fi
}


# func_mktempdir [string]
# Make a temporary directory that won't clash with other running
# libtool processes, and avoids race conditions if possible.  If
# given, STRING is the basename for that directory.
func_mktempdir ()
{
    my_template="${TMPDIR-/tmp}/${1-$progname}"

    if test "$opt_dry_run" = ":"; then
      # Return a directory name, but don't create it in dry-run mode
      my_tmpdir="${my_template}-$$"
    else

      # If mktemp works, use that first and foremost
      my_tmpdir=`mktemp -d "${my_template}-XXXXXXXX" 2>/dev/null`

      if test ! -d "$my_tmpdir"; then
        # Failing that, at least try and use $RANDOM to avoid a race
        my_tmpdir="${my_template}-${RANDOM-0}$$"

        save_mktempdir_umask=`umask`
        umask 0077
        $MKDIR "$my_tmpdir"
        umask $save_mktempdir_umask
      fi

      # If we're not in dry-run mode, bomb out on failure
      test -d "$my_tmpdir" || \
        func_fatal_error "cannot create temporary directory \`$my_tmpdir'"
    fi

    $ECHO "X$my_tmpdir" | $Xsed
}


# func_quote_for_eval arg
# Aesthetically quote ARG to be evaled later.
# This function returns two values: FUNC_QUOTE_FOR_EVAL_RESULT
# is double-quoted, suitable for a subsequent eval, whereas
# FUNC_QUOTE_FOR_EVAL_UNQUOTED_RESULT has merely all characters
# which are still active within double quotes backslashified.
func_quote_for_eval ()
{
    case $1 in
      *[\\\`\"\$]*)
	func_quote_for_eval_unquoted_result=`$ECHO "X$1" | $Xsed -e "$sed_quote_subst"` ;;
      *)
        func_quote_for_eval_unquoted_result="$1" ;;
    esac

    case $func_quote_for_eval_unquoted_result in
      # Double-quote args containing shell metacharacters to delay
      # word splitting, command substitution and and variable
      # expansion for a subsequent eval.
      # Many Bourne shells cannot handle close brackets correctly
      # in scan sets, so we specify it separately.
      *[\@<:@\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*@:>@*|"")
        func_quote_for_eval_result="\"$func_quote_for_eval_unquoted_result\""
        ;;
      *)
        func_quote_for_eval_result="$func_quote_for_eval_unquoted_result"
    esac
}


# func_quote_for_expand arg
# Aesthetically quote ARG to be evaled later; same as above,
# but do not quote variable references.
func_quote_for_expand ()
{
    case $1 in
      *[\\\`\"]*)
	my_arg=`$ECHO "X$1" | $Xsed \
	    -e "$double_quote_subst" -e "$sed_double_backslash"` ;;
      *)
        my_arg="$1" ;;
    esac

    case $my_arg in
      # Double-quote args containing shell metacharacters to delay
      # word splitting and command substitution for a subsequent eval.
      # Many Bourne shells cannot handle close brackets correctly
      # in scan sets, so we specify it separately.
      *[\@<:@\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*@:>@*|"")
        my_arg="\"$my_arg\""
        ;;
    esac

    func_quote_for_expand_result="$my_arg"
}


# func_show_eval cmd [fail_exp]
# Unless opt_silent is true, then output CMD.  Then, if opt_dryrun is
# not true, evaluate CMD.  If the evaluation of CMD fails, and FAIL_EXP
# is given, then evaluate it.
func_show_eval ()
{
    my_cmd="$1"
    my_fail_exp="${2-:}"

    ${opt_silent-false} || {
      func_quote_for_expand "$my_cmd"
      eval "func_echo $func_quote_for_expand_result"
    }

    if ${opt_dry_run-false}; then :; else
      eval "$my_cmd"
      my_status=$?
      if test "$my_status" -eq 0; then :; else
	eval "(exit $my_status); $my_fail_exp"
      fi
    fi
}


# func_show_eval_locale cmd [fail_exp]
# Unless opt_silent is true, then output CMD.  Then, if opt_dryrun is
# not true, evaluate CMD.  If the evaluation of CMD fails, and FAIL_EXP
# is given, then evaluate it.  Use the saved locale for evaluation.
func_show_eval_locale ()
{
    my_cmd="$1"
    my_fail_exp="${2-:}"

    ${opt_silent-false} || {
      func_quote_for_expand "$my_cmd"
      eval "func_echo $func_quote_for_expand_result"
    }

    if ${opt_dry_run-false}; then :; else
      eval "$lt_user_locale
	    $my_cmd"
      my_status=$?
      eval "$lt_safe_locale"
      if test "$my_status" -eq 0; then :; else
	eval "(exit $my_status); $my_fail_exp"
      fi
    fi
}
]])