X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fulonglong.m4;h=dee10ccc3ee641a63153f7b29ae2339c1e56c723;hb=fa3d6ff6dda795a2d9a3a1fff4b0b7e18084b59d;hp=afc765a3eee2966dd06cf6a987cbf0e54d7217cd;hpb=5ee5377428346fa4f04fd2f12a68991bbaeb418c;p=gnulib.git

diff --git a/m4/ulonglong.m4 b/m4/ulonglong.m4
index afc765a3e..dee10ccc3 100644
--- a/m4/ulonglong.m4
+++ b/m4/ulonglong.m4
@@ -1,16 +1,23 @@
-#serial 1
+# ulonglong.m4 serial 4
+dnl Copyright (C) 1999-2004 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.
 
-AC_DEFUN(jm_AC_TYPE_UNSIGNED_LONG_LONG,
+# Define HAVE_UNSIGNED_LONG_LONG if 'unsigned long long' works.
+
+AC_DEFUN([gl_AC_TYPE_UNSIGNED_LONG_LONG],
 [
   AC_CACHE_CHECK([for unsigned long long], ac_cv_type_unsigned_long_long,
-  [AC_TRY_COMPILE([],
-    [unsigned long long i = (unsigned long long) -1;],
+  [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.])
+      [Define if you have the 'unsigned long long' type.])
   fi
 ])