autoconf/bin/autoconf.as

AS_INIT[]dnl                                            -*- shell-script -*-
m4_divert_push([HEADER-COPYRIGHT])dnl
# @configure_input@
# autoconf -- create 'configure' using m4 macros.

# Copyright (C) 1992-1994, 1996, 1999-2017, 2020 Free Software
# Foundation, Inc.

# 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 3 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, see <https://www.gnu.org/licenses/>.

m4_divert_pop([HEADER-COPYRIGHT])dnl back to BODY
AS_ME_PREPARE[]dnl

usage=["\
Usage: $0 [OPTION]... [TEMPLATE-FILE]

Generate a configuration script from a TEMPLATE-FILE if given, or
'configure.ac' if present, or else 'configure.in'.  Output is sent
to the standard output if TEMPLATE-FILE is given, else into
'configure'.

Operation modes:
  -h, --help                print this help, then exit
  -V, --version             print version number, then exit
  -v, --verbose             verbosely report processing
  -d, --debug               don't remove temporary files
  -f, --force               consider all files obsolete
  -o, --output=FILE         save output in FILE (stdout is the default)
  -W, --warnings=CATEGORY   report the warnings falling in CATEGORY [syntax]

Warning categories include:
  'cross'         cross compilation issues
  'obsolete'      obsolete constructs
  'syntax'        dubious syntactic constructs
  'all'           all the warnings
  'no-CATEGORY'   turn off the warnings on CATEGORY
  'none'          turn off all the warnings
  'error'         warnings are error

The environment variables 'M4' and 'WARNINGS' are honored.

Library directories:
  -B, --prepend-include=DIR  prepend directory DIR to search path
  -I, --include=DIR          append directory DIR to search path

Tracing:
  -t, --trace=MACRO[:FORMAT]  report the list of calls to MACRO
  -i, --initialization        also trace Autoconf's initialization process

In tracing mode, no configuration script is created.  FORMAT defaults
to '\$f:\$l:\$n:\$%'; see 'autom4te --help' for information about FORMAT.

Report bugs to <bug-autoconf@gnu.org>.
GNU Autoconf home page: <https://www.gnu.org/software/autoconf/>.
General help using GNU software: <https://www.gnu.org/gethelp/>."]

version=["\
autoconf (@PACKAGE_NAME@) @VERSION@
Copyright (C) @RELEASE_YEAR@ Free Software Foundation, Inc.
License GPLv3+/Autoconf: GNU GPL version 3 or later
<https://gnu.org/licenses/gpl.html>, <https://gnu.org/licenses/exceptions.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by David J. MacKenzie and Akim Demaille."]

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

exit_missing_arg='
  m4_bpatsubst([AS_ERROR([option '$[1]' requires an argument$as_nl$help])],
    ['], ['\\''])'
# restore font-lock: '

# Variables.
: ${AUTOM4TE='@bindir@/@autom4te-name@'}
: ${trailer_m4='@pkgdatadir@/autoconf/trailer.m4'}
autom4te_options=
outfile=
verbose=false

# Parse command line.
while test $# -gt 0 ; do
  option=[`expr "x$1" : 'x\(--[^=]*\)' \| \
	       "x$1" : 'x\(-.\)'`]
  optarg=[`expr "x$1" : 'x--[^=]*=\(.*\)' \| \
	       "x$1" : 'x-.\(.*\)'`]
  case $1 in
    --version | -V )
       echo "$version" ; exit ;;
    --help | -h )
       AS_ECHO(["$usage"]); exit ;;

    --verbose | -v )
       verbose=:
       autom4te_options="$autom4te_options $1"; shift ;;

    # Arguments passed as is to autom4te.
    --debug      | -d   | \
    --force      | -f   | \
    --include=*  | -I?* | \
    --prepend-include=* | -B?* | \
    --warnings=* | -W?* )
       case $1 in
	 *\'*) arg=`AS_ECHO(["$1"]) | sed "s/'/'\\\\\\\\''/g"` ;; #'
	 *) arg=$1 ;;
       esac
       autom4te_options="$autom4te_options '$arg'"; shift ;;
    # Options with separated arg passed as is to autom4te.
    --include  | -I | \
    --prepend-include  | -B | \
    --warnings | -W )
       test $# = 1 && eval "$exit_missing_arg"
       case $2 in
	 *\'*) arg=`AS_ECHO(["$2"]) | sed "s/'/'\\\\\\\\''/g"` ;; #'
	 *) arg=$2 ;;
       esac
       autom4te_options="$autom4te_options $option '$arg'"
       shift; shift ;;

    --trace=* | -t?* )
       traces="$traces --trace='"`AS_ECHO(["$optarg"]) | sed "s/'/'\\\\\\\\''/g"`"'"
       shift ;;
    --trace | -t )
       test $# = 1 && eval "$exit_missing_arg"
       traces="$traces --trace='"`AS_ECHO(["$[2]"]) | sed "s/'/'\\\\\\\\''/g"`"'"
       shift; shift ;;
    --initialization | -i )
       autom4te_options="$autom4te_options --melt"
       shift;;

    --output=* | -o?* )
       outfile=$optarg
       shift ;;
    --output | -o )
       test $# = 1 && eval "$exit_missing_arg"
       outfile=$2
       shift; shift ;;

    -- )     # Stop option processing
       shift; break ;;
    - )	# Use stdin as input.
       break ;;
    -* )
       exec >&2
       AS_ERROR([invalid option '$[1]'$as_nl$help]) ;;
    * )
       break ;;
  esac
done

# Find the input file.
case $# in
  0)
    if test -f configure.ac; then
      if test -f configure.in; then
	AS_ECHO(["$as_me: warning: both 'configure.ac' and 'configure.in' are present."]) >&2
	AS_ECHO(["$as_me: warning: proceeding with 'configure.ac'."]) >&2
      fi
      infile=configure.ac
    elif test -f configure.in; then
      infile=configure.in
    else
      AS_ERROR([no input file])
    fi
    test -z "$traces" && test -z "$outfile" && outfile=configure;;
  1)
    infile=$1 ;;
  *) exec >&2
     AS_ERROR([invalid number of arguments$as_nl$help]) ;;
esac

# Unless specified, the output is stdout.
test -z "$outfile" && outfile=-

# Don't read trailer.m4 if we are tracing.
if test -n "$traces"; then
    trailer_m4=""
else
    # The extra quotes will be stripped by eval.
    trailer_m4=\""$trailer_m4"\"
fi

# Run autom4te with expansion.
# trailer.m4 is read _before_ $infile, despite the name,
# because putting it afterward screws up autom4te's location tracing.
eval set x "$autom4te_options" \
  --language=autoconf --output=\"\$outfile\" "$traces" \
  $trailer_m4 \"\$infile\"
shift
$verbose && AS_ECHO(["$as_me: running $AUTOM4TE $*"]) >&2
exec "$AUTOM4TE" "$@"