1#serial 2
2
3dnl From Paul Eggert.
4
5# Define HAVE_LONG_LONG if 'long long' works.
6
7AC_DEFUN([jm_AC_TYPE_LONG_LONG],
8[
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.])
18  fi
19])
20
21# Define HAVE_UNSIGNED_LONG_LONG if 'unsigned long long' works.
22
23AC_DEFUN([jm_AC_TYPE_UNSIGNED_LONG_LONG],
24[
25  AC_CACHE_CHECK([for unsigned long long], ac_cv_type_unsigned_long_long,
26  [AC_TRY_LINK([unsigned long long ull = 1; int i = 63;],
27    [unsigned long long ullmax = (unsigned long long) -1;
28     return ull << i | ull >> i | ullmax / ull | ullmax % ull;],
29    ac_cv_type_unsigned_long_long=yes,
30    ac_cv_type_unsigned_long_long=no)])
31  if test $ac_cv_type_unsigned_long_long = yes; then
32    AC_DEFINE(HAVE_UNSIGNED_LONG_LONG, 1,
33      [Define if you have the unsigned long long type.])
34  fi
35])
36