#serial 2 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 = 1; 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 ]) # Define HAVE_UNSIGNED_LONG_LONG if 'unsigned long long' works. AC_DEFUN([jm_AC_TYPE_UNSIGNED_LONG_LONG], [ AC_CACHE_CHECK([for unsigned long long], ac_cv_type_unsigned_long_long, [AC_TRY_LINK([unsigned long long ull = 1; int i = 63;], [unsigned long long ullmax = (unsigned long long) -1; return ull << i | ull >> i | ullmax / ull | ullmax % ull;], ac_cv_type_unsigned_long_long=yes, ac_cv_type_unsigned_long_long=no)]) if test $ac_cv_type_unsigned_long_long = yes; then AC_DEFINE(HAVE_UNSIGNED_LONG_LONG, 1, [Define if you have the unsigned long long type.]) fi ])