ulonglong.m4 1.0 KB

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  1. # ulonglong.m4 serial 2 (fileutils-4.0.32, gettext-0.10.40)
  2. dnl Copyright (C) 1999-2002 Free Software Foundation, Inc.
  3. dnl This file is free software, distributed under the terms of the GNU
  4. dnl General Public License. As a special exception to the GNU General
  5. dnl Public License, this file may be distributed as part of a program
  6. dnl that contains a configuration script generated by Autoconf, under
  7. dnl the same distribution terms as the rest of that program.
  8. dnl From Paul Eggert.
  9. AC_DEFUN([jm_AC_TYPE_UNSIGNED_LONG_LONG],
  10. [
  11. AC_CACHE_CHECK([for unsigned long long], ac_cv_type_unsigned_long_long,
  12. [AC_TRY_LINK([unsigned long long ull = 1; int i = 63;],
  13. [unsigned long long ullmax = (unsigned long long) -1;
  14. return ull << i | ull >> i | ullmax / ull | ullmax % ull;],
  15. ac_cv_type_unsigned_long_long=yes,
  16. ac_cv_type_unsigned_long_long=no)])
  17. if test $ac_cv_type_unsigned_long_long = yes; then
  18. AC_DEFINE(HAVE_UNSIGNED_LONG_LONG, 1,
  19. [Define if you have the unsigned long long type.])
  20. fi
  21. ])