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dnl -*- Autoconf -*-
dnl Copyright (C) 1993-2002, 2007-2008 Free Software Foundation, Inc.
dnl Copyright (C) 1993-2002 Free Software Foundation, Inc.
dnl This file is free software, distributed under the terms of the GNU
dnl General Public License.  As a special exception to the GNU General
dnl Public License, this file may be distributed as part of a program
dnl that contains a configuration script generated by Autoconf, under
dnl the same distribution terms as the rest of that program.

dnl From Bruno Haible, Marcus Daniels, Sam Steingold.
dnl From Bruno Haible, Marcus Daniels.

AC_PREREQ(2.13)

dnl CL_PROTO(IDENTIFIER, ACTION-IF-NOT-FOUND, FINAL-PROTOTYPE)
AC_DEFUN([CL_PROTO],
[AC_MSG_CHECKING([for $1 declaration])
AC_CACHE_VAL(cl_cv_proto_[$1], [$2
cl_cv_proto_$1="$3"])
cl_cv_proto_$1=`echo "[$]cl_cv_proto_$1" | tr -s ' ' | sed -e 's/( /(/'`
AC_MSG_RESULT([$]{ac_t:-
         }[$]cl_cv_proto_$1)
])

dnl CL_PROTO_RET(INCLUDES, DECL, CACHE-ID, TYPE-IF-OK, TYPE-IF-FAILS)
dnl CL_PROTO_RET(INCLUDES, ANSI-DECL, TRAD-DECL, CACHE-ID, TYPE-IF-OK, TYPE-IF-FAILS)
AC_DEFUN([CL_PROTO_RET],
[AC_TRY_COMPILE([$1]
AC_LANG_EXTERN
[#if defined(__STDC__) || defined(__cplusplus)
[$2
], [], $3="$4", $3="$5")
$2
#else
$3
#endif
], [], $4="$5", $4="$6")
])

dnl CL_PROTO_TRY(INCLUDES, DECL, ACTION-IF-OK, ACTION-IF-FAILS)
dnl CL_PROTO_TRY(INCLUDES, ANSI-DECL, TRAD-DECL, ACTION-IF-OK, ACTION-IF-FAILS)
AC_DEFUN([CL_PROTO_TRY],
[AC_TRY_COMPILE([$1]
AC_LANG_EXTERN
[#if defined(__STDC__) || defined(__cplusplus)
[$2
], [], [$3], [$4])
$2
#else
$3
#endif
], [], [$4], [$5])
])

dnl CL_PROTO_CONST(INCLUDES, DECL, CACHE-ID)
dnl CL_PROTO_CONST(INCLUDES, ANSI-DECL, TRAD-DECL, CACHE-ID)
AC_DEFUN([CL_PROTO_CONST],
[CL_PROTO_TRY([$1], [$2], $3="", $3="const")]
[CL_PROTO_TRY([$1], [$2], [$3], $4="", $4="const")]
)

dnl CL_PROTO_MISSING(function_name)
AC_DEFUN([CL_PROTO_MISSING],
[AC_MSG_FAILURE([please report the $1() declaration on your platform to $PACKAGE_NAME developers at $PACKAGE_BUGREPORT])])

m4_define([CONST_VARIANTS],['' 'const' '__const'])
m4_define([SIZE_VARIANTS],['unsigned int' 'int' 'unsigned long' 'long' 'size_t' 'socklen_t'])