diff -Nur db-4.1.24.orig/dist/configure.ac db-4.1.24/dist/configure.ac
--- db-4.1.24.orig/dist/configure.ac	Fri Sep  6 15:32:00 2002
+++ db-4.1.24/dist/configure.ac	Tue Nov 19 10:46:41 2002
@@ -474,27 +474,6 @@
 aux*)	ADDITIONAL_OBJS="getopt${o} $ADDITIONAL_OBJS";;
 esac
 
-# Linux has the O_DIRECT flag, but you can't actually use it.
-AC_CACHE_CHECK([for open/O_DIRECT], db_cv_open_o_direct, [
-echo "test for working open/O_DIRECT" > __o_direct_file
-AC_TRY_RUN([
-#include <sys/types.h>
-#include <fcntl.h>
-main() {
-int c, fd = open("__o_direct_file", O_RDONLY | O_DIRECT, 0);
-exit ((fd == -1) || (read(fd, &c, 1) != 1));
-}], [db_cv_open_o_direct=yes], [db_cv_open_o_direct=no],
-AC_TRY_LINK([
-#include <sys/types.h>   
-#include <fcntl.h>], [
-	open("__o_direct_file", O_RDONLY | O_DIRECT, 0);
-], [db_cv_open_o_direct=yes], [db_cv_open_o_direct=no]))
-rm -f __o_direct_file])
-if test "$db_cv_open_o_direct" = yes; then
-	AC_DEFINE(HAVE_O_DIRECT)
-	AH_TEMPLATE(HAVE_O_DIRECT, [Define to 1 if you have the O_DIRECT flag.])
-fi
-
 # Check for largefile support.
 AC_SYS_LARGEFILE