ulonglong.m4 (1882B)
1 # ulonglong.m4 serial 6 2 dnl Copyright (C) 1999-2006 Free Software Foundation, Inc. 3 dnl This file is free software; the Free Software Foundation 4 dnl gives unlimited permission to copy and/or distribute it, 5 dnl with or without modifications, as long as this notice is preserved. 6 7 dnl From Paul Eggert. 8 9 # Define HAVE_UNSIGNED_LONG_LONG_INT if 'unsigned long long int' works. 10 # This fixes a bug in Autoconf 2.60, but can be removed once we 11 # assume 2.61 everywhere. 12 13 # Note: If the type 'unsigned long long int' exists but is only 32 bits 14 # large (as on some very old compilers), AC_TYPE_UNSIGNED_LONG_LONG_INT 15 # will not be defined. In this case you can treat 'unsigned long long int' 16 # like 'unsigned long int'. 17 18 AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT], 19 [ 20 AC_CACHE_CHECK([for unsigned long long int], 21 [ac_cv_type_unsigned_long_long_int], 22 [AC_LINK_IFELSE( 23 [AC_LANG_PROGRAM( 24 [[unsigned long long int ull = 18446744073709551615ULL; 25 typedef int a[(18446744073709551615ULL <= (unsigned long long int) -1 26 ? 1 : -1)]; 27 int i = 63;]], 28 [[unsigned long long int ullmax = 18446744073709551615ull; 29 return (ull << 63 | ull >> 63 | ull << i | ull >> i 30 | ullmax / ull | ullmax % ull);]])], 31 [ac_cv_type_unsigned_long_long_int=yes], 32 [ac_cv_type_unsigned_long_long_int=no])]) 33 if test $ac_cv_type_unsigned_long_long_int = yes; then 34 AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], 1, 35 [Define to 1 if the system has the type `unsigned long long int'.]) 36 fi 37 ]) 38 39 # This macro is obsolescent and should go away soon. 40 AC_DEFUN([gl_AC_TYPE_UNSIGNED_LONG_LONG], 41 [ 42 AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT]) 43 ac_cv_type_unsigned_long_long=$ac_cv_type_unsigned_long_long_int 44 if test $ac_cv_type_unsigned_long_long = yes; then 45 AC_DEFINE(HAVE_UNSIGNED_LONG_LONG, 1, 46 [Define if you have the 'unsigned long long' type.]) 47 fi 48 ])