5 # Define HAVE_LONG_LONG if 'long long' works.
7 AC_DEFUN([jm_AC_TYPE_LONG_LONG],
9 AC_CACHE_CHECK([for long long], ac_cv_type_long_long,
10 [AC_TRY_LINK([long long ll = 1; int i = 63;],
11 [long long llmax = (long long) -1;
12 return ll << i | ll >> i | llmax / ll | llmax % ll;],
13 ac_cv_type_long_long=yes,
14 ac_cv_type_long_long=no)])
15 if test $ac_cv_type_long_long = yes; then
16 AC_DEFINE(HAVE_LONG_LONG, 1,
17 [Define if you have the long long type.])