| # ulonglong.m4 serial 6 |
| dnl Copyright (C) 1999-2006 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_UNSIGNED_LONG_LONG_INT if 'unsigned long long int' works. |
| # This fixes a bug in Autoconf 2.60, but can be removed once we |
| # assume 2.61 everywhere. |
| |
| # Note: If the type 'unsigned long long int' exists but is only 32 bits |
| # large (as on some very old compilers), AC_TYPE_UNSIGNED_LONG_LONG_INT |
| # will not be defined. In this case you can treat 'unsigned long long int' |
| # like 'unsigned long int'. |
| |
| AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT], |
| [ |
| AC_CACHE_CHECK([for unsigned long long int], |
| [ac_cv_type_unsigned_long_long_int], |
| [AC_LINK_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[unsigned long long int ull = 18446744073709551615ULL; |
| typedef int a[(18446744073709551615ULL <= (unsigned long long int) -1 |
| ? 1 : -1)]; |
| int i = 63;]], |
| [[unsigned long long int ullmax = 18446744073709551615ull; |
| return (ull << 63 | ull >> 63 | ull << i | ull >> i |
| | ullmax / ull | ullmax % ull);]])], |
| [ac_cv_type_unsigned_long_long_int=yes], |
| [ac_cv_type_unsigned_long_long_int=no])]) |
| if test $ac_cv_type_unsigned_long_long_int = yes; then |
| AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], 1, |
| [Define to 1 if the system has the type `unsigned long long int'.]) |
| fi |
| ]) |
| |
| # This macro is obsolescent and should go away soon. |
| AC_DEFUN([gl_AC_TYPE_UNSIGNED_LONG_LONG], |
| [ |
| AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT]) |
| ac_cv_type_unsigned_long_long=$ac_cv_type_unsigned_long_long_int |
| 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 |
| ]) |