# longlong.m4 serial 4

dnl Copyright (C) 1999-2003 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 Paul Eggert.

# Define HAVE_LONG_LONG if 'long long' works.

AC_DEFUN([jm_AC_TYPE_LONG_LONG],

[

  AC_CACHE_CHECK([for long long], ac_cv_type_long_long,

  [AC_TRY_LINK([long long ll = 1LL; int i = 63;],

    [long long llmax = (long long) -1;

     return ll << i | ll >> i | llmax / ll | llmax % ll;],

    ac_cv_type_long_long=yes,

    ac_cv_type_long_long=no)])

  if test $ac_cv_type_long_long = yes; then

    AC_DEFINE(HAVE_LONG_LONG, 1,

      [Define if you have the 'long long' type.])

  fi

])