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authorKibum Kim <kb0929.kim@samsung.com>2012-01-07 00:46:38 +0900
committerKibum Kim <kb0929.kim@samsung.com>2012-01-07 00:46:38 +0900
commitf5660c6460a863b19f9ef745575780e37cc192a9 (patch)
tree0b478679da32d706de7b0de546d2e4daf03b160c /m4/ulonglong.m4
parent06b9124a4f9d38acc78e6af686bc49a06f6354f8 (diff)
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+# ulonglong.m4 serial 3
+dnl Copyright (C) 1999-2003 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License. As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+dnl From Paul Eggert.
+
+# 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 = 1ULL; 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
+])