status.m4

autoconf是一个产生可以自动配置源代码包

# mechanism is implemented to handle them.
#
# _AC_LINK_FILES_CNT is used to be robust to multiple calls.
AU_DEFUN([AC_LINK_FILES],
[m4_if($#, 2, ,
       [m4_fatal([$0: incorrect number of arguments])])dnl
m4_define_default([_AC_LINK_FILES_CNT], 0)dnl
m4_define([_AC_LINK_FILES_CNT], m4_incr(_AC_LINK_FILES_CNT))dnl
ac_sources="$1"
ac_dests="$2"
while test -n "$ac_sources"; do
  set $ac_dests; ac_dest=$[1]; shift; ac_dests=$[*]
  set $ac_sources; ac_source=$[1]; shift; ac_sources=$[*]
  [ac_config_links_]_AC_LINK_FILES_CNT="$[ac_config_links_]_AC_LINK_FILES_CNT $ac_dest:$ac_source"
done
AC_CONFIG_LINKS($[ac_config_links_]_AC_LINK_FILES_CNT)dnl
],
[It is technically impossible to `autoupdate' cleanly from AC_LINK_FILES
to AC_CONFIG_LINKS.  `autoupdate' provides a functional but inelegant
update, you should probably tune the result yourself.])# AC_LINK_FILES


# _AC_OUTPUT_LINK
# ---------------
# This macro is expanded inside a here document.  If the here document is
# closed, it has to be reopened with "cat >>$CONFIG_STATUS <<\_ACEOF".
m4_define([_AC_OUTPUT_LINK],
[
  #
  # CONFIG_LINK
  #

  AC_MSG_NOTICE([linking $srcdir/$ac_source to $ac_file])

  if test ! -r "$srcdir/$ac_source"; then
    AC_MSG_ERROR([$srcdir/$ac_source: file not found])
  fi
  rm -f "$ac_file"

  # Try a relative symlink, then a hard link, then a copy.
  case $srcdir in
  [[\\/$]]* | ?:[[\\/]]* ) ac_rel_source=$srcdir/$ac_source ;;
      *) ac_rel_source=$ac_top_build_prefix$srcdir/$ac_source ;;
  esac
  ln -s "$ac_rel_source" "$ac_file" 2>/dev/null ||
    ln "$srcdir/$ac_source" "$ac_file" 2>/dev/null ||
    cp -p "$srcdir/$ac_source" "$ac_file" ||
    AC_MSG_ERROR([cannot link or copy $srcdir/$ac_source to $ac_file])
])# _AC_OUTPUT_LINK



## ------------------------ ##
## Configuration commands.  ##
## ------------------------ ##


# AC_CONFIG_COMMANDS(NAME...,[COMMANDS], [INIT-CMDS])
# ---------------------------------------------------
#
# Specify additional commands to be run by config.status.  This
# commands must be associated with a NAME, which should be thought
# as the name of a file the COMMANDS create.
#
AC_DEFUN([AC_CONFIG_COMMANDS], [_AC_CONFIG_FOOS([COMMANDS], $@)])


# AC_OUTPUT_COMMANDS(EXTRA-CMDS, INIT-CMDS)
# -----------------------------------------
#
# Add additional commands for AC_OUTPUT to put into config.status.
#
# This macro is an obsolete version of AC_CONFIG_COMMANDS.  The only
# difficulty in mapping AC_OUTPUT_COMMANDS to AC_CONFIG_COMMANDS is
# to give a unique key.  The scheme we have chosen is `default-1',
# `default-2' etc. for each call.
#
# Unfortunately this scheme is fragile: bad things might happen
# if you update an included file and configure.ac: you might have
# clashes :(  On the other hand, I'd like to avoid weird keys (e.g.,
# depending upon __file__ or the pid).
AU_DEFUN([AC_OUTPUT_COMMANDS],
[m4_define_default([_AC_OUTPUT_COMMANDS_CNT], 0)dnl
m4_define([_AC_OUTPUT_COMMANDS_CNT], m4_incr(_AC_OUTPUT_COMMANDS_CNT))dnl
dnl Double quoted since that was the case in the original macro.
AC_CONFIG_COMMANDS([default-]_AC_OUTPUT_COMMANDS_CNT, [[$1]], [[$2]])dnl
])


# _AC_OUTPUT_COMMAND
# ------------------
# This macro is expanded inside a here document.  If the here document is
# closed, it has to be reopened with "cat >>$CONFIG_STATUS <<\_ACEOF".
m4_define([_AC_OUTPUT_COMMAND],
[  AC_MSG_NOTICE([executing $ac_file commands])
])



## -------------------------------------- ##
## Pre- and post-config.status commands.  ##
## -------------------------------------- ##


# AC_CONFIG_COMMANDS_PRE(CMDS)
# ----------------------------
# Commands to run right before config.status is created. Accumulates.
AC_DEFUN([AC_CONFIG_COMMANDS_PRE],
[m4_append([AC_OUTPUT_COMMANDS_PRE], [$1
])])


# AC_OUTPUT_COMMANDS_PRE
# ----------------------
# A *variable* in which we append all the actions that must be
# performed before *creating* config.status.  For a start, clean
# up all the LIBOBJ mess.
m4_define([AC_OUTPUT_COMMANDS_PRE],
[_AC_LIBOBJS_NORMALIZE
])


# AC_CONFIG_COMMANDS_POST(CMDS)
# -----------------------------
# Commands to run after config.status was created.  Accumulates.
AC_DEFUN([AC_CONFIG_COMMANDS_POST],
[m4_append([AC_OUTPUT_COMMANDS_POST], [$1
])])

# Initialize.
m4_define([AC_OUTPUT_COMMANDS_POST])



## ----------------------- ##
## Configuration subdirs.  ##
## ----------------------- ##


# AC_CONFIG_SUBDIRS(DIR ...)
# --------------------------
# We define two variables:
# - _AC_LIST_SUBDIRS
#   A statically built list, should contain *all* the arguments of
#   AC_CONFIG_SUBDIRS.  The final value is assigned to ac_subdirs_all in
#   the `default' section, and used for --help=recursive.
#   It is also used in _AC_CONFIG_UNIQUE.
#   It makes no sense for arguments which are sh variables.
# - subdirs
#   Shell variable built at runtime, so some of these dirs might not be
#   included, if for instance the user refused a part of the tree.
#   This is used in _AC_OUTPUT_SUBDIRS.
AC_DEFUN([AC_CONFIG_SUBDIRS],
[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
m4_foreach_w([_AC_Sub], [$1],
	     [_AC_CONFIG_UNIQUE([SUBDIRS],
				m4_bpatsubst(m4_defn([_AC_Sub]), [:.*]))])dnl
m4_append([_AC_LIST_SUBDIRS], [$1], [
])dnl
AS_LITERAL_IF([$1], [],
	      [AC_DIAGNOSE([syntax], [$0: you should use literals])])dnl
AC_SUBST([subdirs], ["$subdirs m4_normalize([$1])"])dnl
])


# _AC_OUTPUT_SUBDIRS
# ------------------
# This is a subroutine of AC_OUTPUT, but it does not go into
# config.status, rather, it is called after running config.status.
m4_define([_AC_OUTPUT_SUBDIRS],
[
#
# CONFIG_SUBDIRS section.
#
if test "$no_recursion" != yes; then

  # Remove --cache-file and --srcdir arguments so they do not pile up.
  ac_sub_configure_args=
  ac_prev=
  eval "set x $ac_configure_args"
  shift
  for ac_arg
  do
    if test -n "$ac_prev"; then
      ac_prev=
      continue
    fi
    case $ac_arg in
    -cache-file | --cache-file | --cache-fil | --cache-fi \
    | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
      ac_prev=cache_file ;;
    -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
    | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* \
    | --c=*)
      ;;
    --config-cache | -C)
      ;;
    -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
      ac_prev=srcdir ;;
    -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
      ;;
    -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
      ac_prev=prefix ;;
    -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
      ;;
    *)
      case $ac_arg in
      *\'*) ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
      esac
      ac_sub_configure_args="$ac_sub_configure_args '$ac_arg'" ;;
    esac
  done

  # Always prepend --prefix to ensure using the same prefix
  # in subdir configurations.
  ac_arg="--prefix=$prefix"
  case $ac_arg in
  *\'*) ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
  esac
  ac_sub_configure_args="$ac_arg $ac_sub_configure_args"

  ac_popdir=`pwd`
  for ac_dir in : $subdirs; do test "x$ac_dir" = x: && continue

    # Do not complain, so a configure script can configure whichever
    # parts of a large source tree are present.
    test -d "$srcdir/$ac_dir" || continue

    ac_msg="=== configuring in $ac_dir (`pwd`/$ac_dir)"
    _AS_ECHO_LOG([$ac_msg])
    _AS_ECHO([$ac_msg])
    AS_MKDIR_P(["$ac_dir"])
    _AC_SRCDIRS(["$ac_dir"])

    cd "$ac_dir"

    # Check for guested configure; otherwise get Cygnus style configure.
    if test -f "$ac_srcdir/configure.gnu"; then
      ac_sub_configure=$ac_srcdir/configure.gnu
    elif test -f "$ac_srcdir/configure"; then
      ac_sub_configure=$ac_srcdir/configure
    elif test -f "$ac_srcdir/configure.in"; then
      # This should be Cygnus configure.
      ac_sub_configure=$ac_aux_dir/configure
    else
      AC_MSG_WARN([no configuration information is in $ac_dir])
      ac_sub_configure=
    fi

    # The recursion is here.
    if test -n "$ac_sub_configure"; then
      # Make the cache file name correct relative to the subdirectory.
      case $cache_file in
      [[\\/]]* | ?:[[\\/]]* ) ac_sub_cache_file=$cache_file ;;
      *) # Relative name.
	ac_sub_cache_file=$ac_top_build_prefix$cache_file ;;
      esac

      AC_MSG_NOTICE([running $SHELL $ac_sub_configure $ac_sub_configure_args --cache-file=$ac_sub_cache_file --srcdir=$ac_srcdir])
      # The eval makes quoting arguments work.
      eval "\$SHELL \"\$ac_sub_configure\" $ac_sub_configure_args \
	   --cache-file=\"\$ac_sub_cache_file\" --srcdir=\"\$ac_srcdir\"" ||
	AC_MSG_ERROR([$ac_sub_configure failed for $ac_dir])
    fi

    cd "$ac_popdir"
  done
fi
])# _AC_OUTPUT_SUBDIRS




## -------------------------- ##
## Outputting config.status.  ##
## -------------------------- ##


# AU::AC_OUTPUT([CONFIG_FILES...], [EXTRA-CMDS], [INIT-CMDS])
# -----------------------------------------------------------
#
# If there are arguments given to AC_OUTPUT, dispatch them to the
# proper modern macros.
AU_DEFUN([AC_OUTPUT],
[m4_ifvaln([$1],
	   [AC_CONFIG_FILES([$1])])dnl
m4_ifvaln([$2$3],
	  [AC_CONFIG_COMMANDS(default, [$2], [$3])])dnl
[AC_OUTPUT]])


# AC_OUTPUT([CONFIG_FILES...], [EXTRA-CMDS], [INIT-CMDS])
# -------------------------------------------------------
# The big finish.
# Produce config.status, config.h, and links; and configure subdirs.
#
m4_define([AC_OUTPUT],
[dnl Dispatch the extra arguments to their native macros.
m4_ifvaln([$1],
	  [AC_CONFIG_FILES([$1])])dnl
m4_ifvaln([$2$3],
	  [AC_CONFIG_COMMANDS(default, [$2], [$3])])dnl
m4_ifval([$1$2$3],
	 [AC_DIAGNOSE([obsolete],
		      [$0 should be used without arguments.
You should run autoupdate.])])dnl
AC_CACHE_SAVE

test "x$prefix" = xNONE && prefix=$ac_default_prefix
# Let make expand exec_prefix.
test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'

m4_ifdef([_AC_SEEN_CONFIG(HEADERS)], [DEFS=-DHAVE_CONFIG_H], [AC_OUTPUT_MAKE_DEFS()])

dnl Commands to run before creating config.status.
AC_OUTPUT_COMMANDS_PRE()dnl

: ${CONFIG_STATUS=./config.status}
ac_clean_files_save=$ac_clean_files
ac_clean_files="$ac_clean_files $CONFIG_STATUS"
_AC_OUTPUT_CONFIG_STATUS()dnl
ac_clean_files=$ac_clean_files_save

dnl Commands to run after config.status was created
AC_OUTPUT_COMMANDS_POST()dnl

# configure is writing to config.log, and then calls config.status.
# config.status does its own redirection, appending to config.log.
# Unfortunately, on DOS this fails, as config.log is still kept open
# by configure, so config.status won't be able to write to it; its
# output is simply discarded.  So we exec the FD to /dev/null,
# effectively closing config.log, so it can be properly (re)opened and
# appended to by config.status.  When coming back to configure, we
# need to make the FD available again.
if test "$no_create" != yes; then
  ac_cs_success=:
  ac_config_status_args=
  test "$silent" = yes &&
    ac_config_status_args="$ac_config_status_args --quiet"
  exec AS_MESSAGE_LOG_FD>/dev/null
  $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false
  exec AS_MESSAGE_LOG_FD>>config.log
  # Use ||, not &&, to avoid exiting from the if with $? = 1, which
  # would make configure fail if this is the last instruction.
  $ac_cs_success || AS_EXIT([1])
fi
dnl config.status should not do recursion.
AC_PROVIDE_IFELSE([AC_CONFIG_SUBDIRS], [_AC_OUTPUT_SUBDIRS()])dnl
])# AC_OUTPUT


# _AC_OUTPUT_CONFIG_STATUS
# ------------------------
# Produce config.status.  Called by AC_OUTPUT.
# Pay special attention not to have too long here docs: some old
# shells die.  Unfortunately the limit is not known precisely...
m4_define([_AC_OUTPUT_CONFIG_STATUS],
[AC_MSG_NOTICE([creating $CONFIG_STATUS])
dnl AS_MESSAGE_LOG_FD is not available yet:
m4_rename([AS_MESSAGE_LOG_FD], [_AC_save_AS_MESSAGE_LOG_FD])dnl
cat >$CONFIG_STATUS <<_ACEOF
#! $SHELL
# Generated by $as_me.
# Run this file to recreate the current configuration.
# Compiler output produced by configure, useful for debugging
# configure, is in config.log if it exists.

debug=false
ac_cs_recheck=false
ac_cs_silent=false
SHELL=\${CONFIG_SHELL-$SHELL}
_ACEOF

cat >>$CONFIG_STATUS <<\_ACEOF
AS_SHELL_SANITIZE
dnl Watch out, this is directly the initializations, do not use
dnl AS_PREPARE, otherwise you'd get it output in the initialization
dnl of configure, not config.status.
_AS_PREPARE
exec AS_MESSAGE_FD>&1

# Save the log message, to keep $[0] and so on meaningful, and to
# report actual input values of CONFIG_FILES etc. instead of their