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# longlong.m4 serial 5
dnl Copyright (C) 1999-2004 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl From Paul Eggert.
# Define HAVE_LONG_LONG if 'long long' works.
AC_DEFUN([gl_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
])
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