diff options
Diffstat (limited to 'm4/ulonglong.m4')
| -rw-r--r-- | m4/ulonglong.m4 | 43 |
1 files changed, 34 insertions, 9 deletions
diff --git a/m4/ulonglong.m4 b/m4/ulonglong.m4 index dee10ccc..9fae98e3 100644 --- a/m4/ulonglong.m4 +++ b/m4/ulonglong.m4 @@ -1,21 +1,46 @@ -# ulonglong.m4 serial 4 -dnl Copyright (C) 1999-2004 Free Software Foundation, Inc. +# 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 if 'unsigned long long' works. +# 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 $ac_cv_type_unsigned_long_long_int = yes; then + AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], 1, + [Define to 1 if the system has the type `unsigned long long int'.]) + fi +]) + +# This macro is obsolescent and should go away soon. AC_DEFUN([gl_AC_TYPE_UNSIGNED_LONG_LONG], [ - AC_CACHE_CHECK([for unsigned long long], ac_cv_type_unsigned_long_long, - [AC_TRY_LINK([unsigned long long ull = 1ULL; int i = 63;], - [unsigned long long ullmax = (unsigned long long) -1; - return ull << i | ull >> i | ullmax / ull | ullmax % ull;], - ac_cv_type_unsigned_long_long=yes, - ac_cv_type_unsigned_long_long=no)]) + AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT]) + ac_cv_type_unsigned_long_long=$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.]) |