# This file is part of Autoconf.                       -*- Autoconf -*-# Checking for programs.# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002# 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 2, 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, write to the Free Software# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA# 02111-1307, USA.# As a special exception, the Free Software Foundation gives unlimited# permission to copy, distribute and modify the configure scripts that# are the output of Autoconf.  You need not follow the terms of the GNU# General Public License when using or distributing such scripts, even# though portions of the text of Autoconf appear in them.  The GNU# General Public License (GPL) does govern all other use of the material# that constitutes the Autoconf program.## Certain portions of the Autoconf source text are designed to be copied# (in certain cases, depending on the input) into the output of# Autoconf.  We call these the "data" portions.  The rest of the Autoconf# source text consists of comments plus executable code that decides which# of the data portions to output in any given case.  We call these# comments and executable code the "non-data" portions.  Autoconf never# copies any of the non-data portions into its output.## This special exception to the GPL applies to versions of Autoconf# released by the Free Software Foundation.  When you make and# distribute a modified version of Autoconf, you may extend this special# exception to the GPL to apply to your modified version as well, *unless*# your modified version has the potential to copy into its output some# of the text that was the non-data portion of the version that you started# with.  (In other words, unless your change moves or copies text from# the non-data portions to the data portions.)  If your modification has# such potential, you must delete any notice of this special exception# to the GPL from your modified version.## Written by David MacKenzie, with help from# Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,# Roland McGrath, Noah Friedman, david d zuhn, and many others.## ----------------------------- #### Generic checks for programs.  #### ----------------------------- ### AC_CHECK_PROG(VARIABLE, PROG-TO-CHECK-FOR,#               [VALUE-IF-FOUND], [VALUE-IF-NOT-FOUND],#               [PATH], [REJECT])# -----------------------------------------------------AC_DEFUN([AC_CHECK_PROG],[# Extract the first word of "$2", so it can be a program name with args.set dummy $2; ac_word=$[2]AC_MSG_CHECKING([for $ac_word])AC_CACHE_VAL(ac_cv_prog_$1,[if test -n "$$1"; then  ac_cv_prog_$1="$$1" # Let the user override the test.elsem4_ifvaln([$6],[  ac_prog_rejected=no])dnl_AS_PATH_WALK([$5],[for ac_exec_ext in '' $ac_executable_extensions; do  if AS_EXECUTABLE_P(["$as_dir/$ac_word$ac_exec_ext"]); thenm4_ifvaln([$6],[    if test "$as_dir/$ac_word$ac_exec_ext" = "$6"; then       ac_prog_rejected=yes       continue     fi])dnl    ac_cv_prog_$1="$3"    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&AS_MESSAGE_LOG_FD    break 2  fidone])m4_ifvaln([$6],[if test $ac_prog_rejected = yes; then  # We found a bogon in the path, so make sure we never use it.  set dummy $ac_cv_prog_$1  shift  if test $[@%:@] != 0; then    # We chose a different compiler from the bogus one.    # However, it has the same basename, so the bogon will be chosen    # first if we set $1 to just the basename; use the full file name.    shift    ac_cv_prog_$1="$as_dir/$ac_word${1+' '}$[@]"m4_if([$2], [$4],[  else    # Default is a loser.    AC_MSG_ERROR([$1=$6 unacceptable, but no other $4 found in dnlm4_default([$5], [\$PATH])])])dnl  fifi])dnldnl If no 4th arg is given, leave the cache variable unset,dnl so AC_CHECK_PROGS will keep looking.m4_ifvaln([$4],[  test -z "$ac_cv_prog_$1" && ac_cv_prog_$1="$4"])dnlfi])dnl$1=$ac_cv_prog_$1if test -n "$$1"; then  AC_MSG_RESULT([$$1])else  AC_MSG_RESULT([no])fiAC_SUBST($1)dnl])# AC_CHECK_PROG# AC_CHECK_PROGS(VARIABLE, PROGS-TO-CHECK-FOR, [VALUE-IF-NOT-FOUND],#                [PATH])# ------------------------------------------------------------------AC_DEFUN([AC_CHECK_PROGS],[for ac_prog in $2do  AC_CHECK_PROG([$1], [$ac_prog], [$ac_prog], , [$4])  test -n "$$1" && breakdonem4_ifvaln([$3], [test -n "$$1" || $1="$3"])])# AC_PATH_PROG(VARIABLE, PROG-TO-CHECK-FOR, [VALUE-IF-NOT-FOUND], [PATH])# -----------------------------------------------------------------------AC_DEFUN([AC_PATH_PROG],[# Extract the first word of "$2", so it can be a program name with args.set dummy $2; ac_word=$[2]AC_MSG_CHECKING([for $ac_word])AC_CACHE_VAL([ac_cv_path_$1],[case $$1 in  [[\\/]]* | ?:[[\\/]]*)  ac_cv_path_$1="$$1" # Let the user override the test with a path.  ;;  *)  _AS_PATH_WALK([$4],[for ac_exec_ext in '' $ac_executable_extensions; do  if AS_EXECUTABLE_P(["$as_dir/$ac_word$ac_exec_ext"]); then    ac_cv_path_$1="$as_dir/$ac_word$ac_exec_ext"    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&AS_MESSAGE_LOG_FD    break 2  fidone])dnl If no 3rd arg is given, leave the cache variable unset,dnl so AC_PATH_PROGS will keep looking.m4_ifvaln([$3],[  test -z "$ac_cv_path_$1" && ac_cv_path_$1="$3"])dnl  ;;esac])dnlAC_SUBST([$1], [$ac_cv_path_$1])if test -n "$$1"; then  AC_MSG_RESULT([$$1])else  AC_MSG_RESULT([no])fi])# AC_PATH_PROG# AC_PATH_PROGS(VARIABLE, PROGS-TO-CHECK-FOR, [VALUE-IF-NOT-FOUND],#               [PATH])# -----------------------------------------------------------------AC_DEFUN([AC_PATH_PROGS],[for ac_prog in $2do  AC_PATH_PROG([$1], [$ac_prog], , [$4])  test -n "$$1" && breakdonem4_ifvaln([$3], [test -n "$$1" || $1="$3"])dnl])## -------------------------- #### Generic checks for tools.  #### -------------------------- ### AC_CHECK_TOOL_PREFIX# --------------------AU_DEFUN([AC_CHECK_TOOL_PREFIX])# AC_PATH_TOOL(VARIABLE, PROG-TO-CHECK-FOR, [VALUE-IF-NOT-FOUND], [PATH])# -----------------------------------------------------------------------# (Use different variables $1 and ac_pt_$1 so that cache vars don't conflict.)AC_DEFUN([AC_PATH_TOOL],[if test -n "$ac_tool_prefix"; then  AC_PATH_PROG([$1], [${ac_tool_prefix}$2], , [$4])fiif test -z "$ac_cv_path_$1"; then  ac_pt_$1=$$1  AC_PATH_PROG([ac_pt_$1], [$2], [$3], [$4])  $1=$ac_pt_$1else  $1="$ac_cv_path_$1"fi])# AC_PATH_TOOL# AC_CHECK_TOOL(VARIABLE, PROG-TO-CHECK-FOR, [VALUE-IF-NOT-FOUND], [PATH])# ------------------------------------------------------------------------# (Use different variables $1 and ac_ct_$1 so that cache vars don't conflict.)AC_DEFUN([AC_CHECK_TOOL],[if test -n "$ac_tool_prefix"; then  AC_CHECK_PROG([$1], [${ac_tool_prefix}$2], [${ac_tool_prefix}$2], , [$4])fiif test -z "$ac_cv_prog_$1"; then  ac_ct_$1=$$1  AC_CHECK_PROG([ac_ct_$1], [$2], [$2], [$3], [$4])  $1=$ac_ct_$1else  $1="$ac_cv_prog_$1"fi])# AC_CHECK_TOOL# AC_CHECK_TOOLS(VARIABLE, PROGS-TO-CHECK-FOR, [VALUE-IF-NOT-FOUND],#                [PATH])# ------------------------------------------------------------------# Check for each tool in PROGS-TO-CHECK-FOR with the cross prefix. If# none can be found with a cross prefix, then use the first one that# was found without the cross prefix.AC_DEFUN([AC_CHECK_TOOLS],[if test -n "$ac_tool_prefix"; then  for ac_prog in $2  do    AC_CHECK_PROG([$1],                  [$ac_tool_prefix$ac_prog], [$ac_tool_prefix$ac_prog],,                  [$4])    test -n "$$1" && break  donefiif test -z "$$1"; then  ac_ct_$1=$$1  AC_CHECK_PROGS([ac_ct_$1], [$2], [$3], [$4])  $1=$ac_ct_$1fi])# AC_CHECK_TOOLS## ---------------- #### Specific tests.  #### ---------------- ### Please, keep this section sorted.# (But of course when keeping related things together).